{"id":105,"date":"2026-07-14T09:56:16","date_gmt":"2026-07-14T09:56:16","guid":{"rendered":"https:\/\/onestepblowmoldingmachine.com\/how-does-an-injection-blow-molding-machine-work-step-by-step\/"},"modified":"2026-07-14T09:56:16","modified_gmt":"2026-07-14T09:56:16","slug":"how-does-an-injection-blow-molding-machine-work-step-by-step","status":"publish","type":"post","link":"https:\/\/onestepblowmoldingmachine.com\/fr\/how-does-an-injection-blow-molding-machine-work-step-by-step\/","title":{"rendered":"How Does an Injection Blow Molding Machine Work Step by Step?"},"content":{"rendered":"<p><script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\",\n    \"@graph\": [\n        {\n            \"@type\": \"Article\",\n            \"@id\": \"https:\\\/\\\/onestepblowmoldingmachine.com\\\/how-does-injection-blow-molding-machine-work\\\/#article\",\n            \"headline\": \"How Does an Injection Blow Molding Machine Work Step by Step?\",\n            \"description\": \"A complete guide to how injection blow molding machines work, covering every process step, key components, and technical parameters for buyers and engineers.\",\n            \"image\": \"https:\\\/\\\/onestepblowmoldingmachine.com\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/ibm-operating-principle.webp\",\n            \"author\": {\n                \"@type\": \"Organization\",\n                \"name\": \"One Step Blow Molding Machine\"\n            },\n            \"publisher\": {\n                \"@type\": \"Organization\",\n                \"name\": \"One Step Blow Molding Machine\",\n                \"logo\": {\n                    \"@type\": \"ImageObject\",\n                    \"url\": \"https:\\\/\\\/onestepblowmoldingmachine.com\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/ibm-machine-factory-1-scaled.webp\"\n                }\n            },\n            \"datePublished\": \"2026-07-01\",\n            \"dateModified\": \"2026-07-14\"\n        },\n        {\n            \"@type\": \"BreadcrumbList\",\n            \"itemListElement\": [\n                {\n                    \"@type\": \"ListItem\",\n                    \"position\": 1,\n                    \"name\": \"Home\",\n                    \"item\": \"https:\\\/\\\/onestepblowmoldingmachine.com\\\/\"\n                },\n                {\n                    \"@type\": \"ListItem\",\n                    \"position\": 2,\n                    \"name\": \"IBM Machine Blogs\",\n                    \"item\": \"https:\\\/\\\/onestepblowmoldingmachine.com\\\/ibm-machine-blogs\\\/\"\n                },\n                {\n                    \"@type\": \"ListItem\",\n                    \"position\": 3,\n                    \"name\": \"How Does an Injection Blow Molding Machine Work Step by Step?\"\n                }\n            ]\n        },\n        {\n            \"@type\": \"FAQPage\",\n            \"mainEntity\": [\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What is the basic principle of injection blow molding?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"The IBM process first injects molten plastic around a steel core rod to form a preform, then transfers the preform to a blow station where pressurised air expands it into the final bottle shape inside a blow mold.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"How long does one IBM cycle take?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"A typical cycle for small pharmaceutical bottles (10\\u201360 ml) runs 8\\u201318 seconds, depending on wall thickness, material, and cooling efficiency.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What materials can be processed on an IBM machine?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"IBM machines process PP, PE, PET, PVC, and PETG. PP and PE are most common for pharmaceutical and cosmetic bottles.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What is the difference between the injection station and the blow station?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"The injection station forms the parison (preform) by injecting molten resin into a closed mold around the core rod. The blow station uses compressed air through the core rod to expand the preform against the blow mold walls.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"Can an IBM machine run multiple cavities simultaneously?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Yes. Most IBM machines operate with 2, 4, 6, or more cavities per station, allowing simultaneous production of multiple bottles per cycle to maximise output.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"Why is cooling important in the IBM process?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Adequate cooling solidifies the bottle walls before ejection, preventing deformation and ensuring dimensional accuracy. Both the core rod and blow mold incorporate cooling channels.\"\n                    }\n                }\n            ]\n        }\n    ]\n}<\/script><\/p>\n<nav aria-label=\"chapelure\" style=\"font-size:13px;color:#555;margin-bottom:18px;\">\n  <a href=\"\/fr\/\" style=\"color:#0057a8;text-decoration:none;\">Maison<\/a> \u203a<br \/>\n  <a href=\"\/fr\/ibm-machine-blogs\/\" style=\"color:#0057a8;text-decoration:none;\">IBM Machine Blogs<\/a> \u203a<br \/>\n  <span>How Does an Injection Blow Molding Machine Work?<\/span><br \/>\n<\/nav>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:24px;\">\nUnderstanding exactly how an injection blow molding machine transforms raw plastic pellets into perfectly formed bottles is essential for anyone evaluating equipment, troubleshooting production issues, or optimising an existing line. This guide breaks the entire IBM process into clear, sequential steps \u2014 from material preparation through ejection \u2014 and explains the engineering behind each stage so you can make informed decisions about equipment, parameters, and molds.\n<\/p>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:32px;\">\nWhether you manufacture pharmaceutical vials, cosmetic jars, or food-grade containers, the fundamental IBM workflow remains the same. Master it, and you gain the insight to raise output quality, reduce scrap, and optimise cycle times on any machine you operate.\n<\/p>\n<div style=\"text-align:center;margin-bottom:36px;\">\n  <img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/onestepblowmoldingmachine.com\/wp-content\/uploads\/2026\/07\/ibm-operating-principle.webp\"\n       alt=\"Injection blow molding machine operating principle diagram showing all process stations\"\n       style=\"max-width:100%;height:auto;border-radius:8px;box-shadow:0 2px 12px rgba(0,0,0,0.10);\"\n       loading=\"eager\" width=\"900\" height=\"500\" \/><\/p>\n<p style=\"font-size:13px;color:#777;margin-top:8px;\">Fig 1 \u2014 Full IBM process cycle from injection station to ejection station<\/p>\n<\/div>\n<h2 style=\"font-size:24px;color:#1a3c6e;border-left:4px solid #0057a8;padding-left:14px;margin-top:40px;\">1. Why Understanding the IBM Process Matters for Buyers<\/h2>\n<p style=\"font-size:16px;line-height:1.8;color:#333;\">\nInjection blow molding machines represent a significant capital investment. Buyers who understand the mechanics can specify the right clamping tonnage, cavity count, and auxiliary equipment from the start \u2014 preventing costly mismatches between machine capability and product requirements. Engineers who know each process stage can diagnose defects at their root cause rather than guessing. And operations managers who understand cycle-time drivers can set realistic production targets and negotiate maintenance contracts intelligently.\n<\/p>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:28px;\">\nVisit our <a href=\"\/fr\/products\/ibm-machines\/\" style=\"color:#0057a8;text-decoration:underline;\">IBM machine product range<\/a> to see how different model sizes align with different production volumes and bottle geometries.\n<\/p>\n<h2 style=\"font-size:24px;color:#1a3c6e;border-left:4px solid #0057a8;padding-left:14px;margin-top:40px;\">2. Overview of the Injection Blow Molding Process<\/h2>\n<p style=\"font-size:16px;line-height:1.8;color:#333;\">\nThe IBM process is a three- or four-station rotary (or linear) operation in which a steel core rod acts as the central transfer mechanism. Molten plastic is first moulded around the rod, the rod then rotates or indexes to a blow station where compressed air inflates the bottle, and the finished container is stripped from the rod at the ejection station. On four-station machines a conditioning station between injection and blow allows fine temperature adjustment of the preform.\n<\/p>\n<div style=\"overflow-x:auto;margin:24px 0;\">\n<table style=\"width:100%;border-collapse:collapse;font-size:15px;\">\n<thead>\n<tr>\n<th style=\"background-color:#0057a8;color:white;padding:10px 14px;text-align:left;\">Station<\/th>\n<th style=\"background-color:#0057a8;color:white;padding:10px 14px;text-align:left;\">Action<\/th>\n<th style=\"background-color:#0057a8;color:white;padding:10px 14px;text-align:left;\">Key Variable<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background:#f4f8ff;\">\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Injection<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Form parison around core rod<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Melt temperature, injection pressure<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Conditioning (optional)<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Equilibrate preform temperature<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Heater band settings<\/td>\n<\/tr>\n<tr style=\"background:#f4f8ff;\">\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Blow<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Inflate preform to final shape<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Blow pressure, blow time<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:9px 14px;\">Ejection<\/td>\n<td style=\"padding:9px 14px;\">Strip finished bottle from rod<\/td>\n<td style=\"padding:9px 14px;\">Stripper plate timing<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2 style=\"font-size:24px;color:#1a3c6e;border-left:4px solid #0057a8;padding-left:14px;margin-top:40px;\">3. Step 1 \u2014 Material Preparation and Plasticising<\/h2>\n<p style=\"font-size:16px;line-height:1.8;color:#333;\">\nBefore any plastic enters the machine barrel, raw resin pellets must be dried to specified moisture levels. PP typically requires 2\u20134 hours at 80 \u00b0C; PE needs minimal drying; PET must reach below 50 ppm moisture \u2014 usually 4 hours at 160 \u00b0C in a desiccant dryer. Inadequate drying causes hydrolysis, surface splay, and mechanical weakness in the finished bottle.\n<\/p>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:24px;\">\nInside the plasticising barrel, a reciprocating screw rotates and advances, generating frictional and conductive heat to melt the pellets. The screw compresses the melt, vents any residual moisture, and accumulates a precise shot volume in front of the screw tip. Backpressure setting (commonly 5\u201315 bar) controls melt density and homogeneity.\n<\/p>\n<div style=\"text-align:center;margin-bottom:36px;\">\n  <img decoding=\"async\" src=\"https:\/\/onestepblowmoldingmachine.com\/wp-content\/uploads\/2026\/07\/ibm-machine-factory-1-scaled.webp\"\n       alt=\"IBM machine production facility showing injection blow molding equipment in operation\"\n       style=\"max-width:100%;height:auto;border-radius:8px;box-shadow:0 2px 12px rgba(0,0,0,0.10);\"\n       loading=\"lazy\" width=\"900\" height=\"500\" \/><\/p>\n<p style=\"font-size:13px;color:#777;margin-top:8px;\">Fig 2 \u2014 Modern IBM machine factory floor with multi-cavity production lines<\/p>\n<\/div>\n<h2 style=\"font-size:24px;color:#1a3c6e;border-left:4px solid #0057a8;padding-left:14px;margin-top:40px;\">4. Step 2 \u2014 Injection Moulding of the Preform<\/h2>\n<p style=\"font-size:16px;line-height:1.8;color:#333;\">\nWith the injection mold closed around the core rod, the plasticising unit shoots the metered melt through a hot runner or sprue into the mold cavity. Injection pressure (typically 800\u20131,800 bar at the nozzle) packs the cavity completely and compensates for material shrinkage during initial solidification. The mold is water-cooled to harden the outer skin of the preform while the core rod maintains the inner dimension.\n<\/p>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:24px;\">\nCritically, the neck finish \u2014 threads, sealing surface, and neck diameter \u2014 is fully formed at this injection stage and dimensionally locked in. This is one of IBM key advantages over extrusion blow molding: the neck finish needs no trimming and is consistent to very tight tolerances.\n<\/p>\n<div style=\"text-align:center;margin-bottom:36px;\">\n  <img decoding=\"async\" src=\"https:\/\/onestepblowmoldingmachine.com\/wp-content\/uploads\/2026\/07\/ibm-injection-mold.webp\"\n       alt=\"IBM injection mold showing core rod and cavity layout for pharmaceutical bottle production\"\n       style=\"max-width:100%;height:auto;border-radius:8px;box-shadow:0 2px 12px rgba(0,0,0,0.10);\"\n       loading=\"lazy\" width=\"900\" height=\"500\" \/><\/p>\n<p style=\"font-size:13px;color:#777;margin-top:8px;\">Fig 3 \u2014 Injection mold assembly with core rod: the foundation of dimensional precision<\/p>\n<\/div>\n<h2 style=\"font-size:24px;color:#1a3c6e;border-left:4px solid #0057a8;padding-left:14px;margin-top:40px;\">5. Step 3 \u2014 Transfer to the Blow Station<\/h2>\n<p style=\"font-size:16px;line-height:1.8;color:#333;\">\nOnce the preform skin has solidified sufficiently, the injection mold opens and the rotary table (or linear shuttle) indexes the core rod \u2014 with the preform still on it \u2014 to the blow station. This transfer happens with the preform at a carefully managed temperature: hot enough to be blown without re-heating, yet cool enough to retain the neck finish geometry. On three-station machines this balance is achieved by precise mold-cooling timing. Four-station machines add a conditioning station where heater bands can raise or equalise preform temperature zone by zone.\n<\/p>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:28px;\">\nRotary machines typically index through 120\u00b0 per station (three stations) or 90\u00b0 (four stations). The indexing speed must be fast enough to maintain short cycle times without mechanical shock to the preform.\n<\/p>\n<h2 style=\"font-size:24px;color:#1a3c6e;border-left:4px solid #0057a8;padding-left:14px;margin-top:40px;\">6. Step 4 \u2014 Blow Moulding and Bottle Forming<\/h2>\n<p style=\"font-size:16px;line-height:1.8;color:#333;\">\nAt the blow station the blow mold closes around the preform-on-rod assembly. Compressed air \u2014 at 6\u201310 bar for PP\/PE, up to 15 bar for PET \u2014 is introduced through the hollow core rod. The preform inflates radially outward until it contacts the blow mold cavity walls and takes the precise shape of the finished bottle body.\n<\/p>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:24px;\">\nBlow time is held for 2\u20138 seconds while the mold cooling channels chill the bottle walls to a stable temperature. Blow pressure must be maintained throughout this hold time to prevent elastic recovery (spring-back) that would distort the final shape. At the end of blow time, the air is vented, the blow mold opens, and the table indexes again.\n<\/p>\n<div style=\"text-align:center;margin-bottom:36px;\">\n  <img decoding=\"async\" src=\"https:\/\/onestepblowmoldingmachine.com\/wp-content\/uploads\/2026\/07\/ibm-blow-mold.webp\"\n       alt=\"IBM blow mold open showing bottle cavity and cooling channel layout\"\n       style=\"max-width:100%;height:auto;border-radius:8px;box-shadow:0 2px 12px rgba(0,0,0,0.10);\"\n       loading=\"lazy\" width=\"900\" height=\"500\" \/><\/p>\n<p style=\"font-size:13px;color:#777;margin-top:8px;\">Fig 4 \u2014 IBM blow mold halves with cooling channels for rapid bottle solidification<\/p>\n<\/div>\n<h2 style=\"font-size:24px;color:#1a3c6e;border-left:4px solid #0057a8;padding-left:14px;margin-top:40px;\">7. Step 5 \u2014 Ejection and Product Cooling<\/h2>\n<p style=\"font-size:16px;line-height:1.8;color:#333;\">\nAt the ejection station a stripper plate or cam-driven mechanism pushes the solidified bottle off the core rod. The bottle falls into a collection chute or onto a conveyor. On continuous rotary machines all three (or four) stations operate simultaneously \u2014 while one bottle is being ejected, the next preform is being injection moulded and another is being blown. This simultaneity is what makes IBM highly productive relative to its machine footprint.\n<\/p>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:28px;\">\nSome lines include in-line leak testing, vision inspection, or direct labelling after ejection to compress total cycle time from moulding through quality control.\n<\/p>\n<h2 style=\"font-size:24px;color:#1a3c6e;border-left:4px solid #0057a8;padding-left:14px;margin-top:40px;\">8. Key Components Involved at Each Stage<\/h2>\n<div style=\"display:flex;flex-wrap:wrap;gap:20px;margin-bottom:32px;\">\n<div style=\"flex:1;min-width:260px;background:#f0f5ff;border-radius:8px;padding:20px;\">\n<h3 style=\"font-size:17px;color:#1a3c6e;margin-top:0;\">Plasticising Barrel &amp; Screw<\/h3>\n<p style=\"font-size:15px;line-height:1.7;color:#444;margin:0;\">L\/D ratio typically 20:1 to 24:1. General-purpose screw geometry for PP\/PE; barrier screws for PET. Electrically heated barrel zones (3\u20135 zones) with PID temperature control.<\/p>\n<\/p><\/div>\n<div style=\"flex:1;min-width:260px;background:#f0f5ff;border-radius:8px;padding:20px;\">\n<h3 style=\"font-size:17px;color:#1a3c6e;margin-top:0;\">Core Rod Assembly<\/h3>\n<p style=\"font-size:15px;line-height:1.7;color:#444;margin:0;\">Hardened steel rods (H13 or S136) with internal cooling channel. Rod diameter sets bottle neck inner diameter. Surface finish Ra 0.4 \u00b5m or better for easy release.<\/p>\n<\/p><\/div>\n<div style=\"flex:1;min-width:260px;background:#f0f5ff;border-radius:8px;padding:20px;\">\n<h3 style=\"font-size:17px;color:#1a3c6e;margin-top:0;\">Injection Mold<\/h3>\n<p style=\"font-size:15px;line-height:1.7;color:#444;margin:0;\">2\u201312 cavities machined from P20 or H13 steel. Hot runner preferred for multi-cavity to eliminate cold sprue. Neck ring inserts define thread geometry with \u00b10.05 mm tolerance.<\/p>\n<\/p><\/div>\n<div style=\"flex:1;min-width:260px;background:#f0f5ff;border-radius:8px;padding:20px;\">\n<h3 style=\"font-size:17px;color:#1a3c6e;margin-top:0;\">Blow Mold<\/h3>\n<p style=\"font-size:15px;line-height:1.7;color:#444;margin:0;\">Split two-piece mold, often aluminium for faster cooling or P20 steel for longer life. Vent grooves (0.02\u20130.04 mm) prevent air trapping. Cavity surface texture transferred directly to bottle.<\/p>\n<\/p><\/div>\n<div style=\"flex:1;min-width:260px;background:#f0f5ff;border-radius:8px;padding:20px;\">\n<h3 style=\"font-size:17px;color:#1a3c6e;margin-top:0;\">Blowing Nozzle<\/h3>\n<p style=\"font-size:15px;line-height:1.7;color:#444;margin:0;\">Seats against the core rod head to deliver compressed air into the hollow preform. Must withstand cyclic pressure fatigue; hardened stainless steel recommended.<\/p>\n<\/p><\/div>\n<div style=\"flex:1;min-width:260px;background:#f0f5ff;border-radius:8px;padding:20px;\">\n<h3 style=\"font-size:17px;color:#1a3c6e;margin-top:0;\">Hydraulic \/ Servo Drive<\/h3>\n<p style=\"font-size:15px;line-height:1.7;color:#444;margin:0;\">Drives mold open\/close, injection unit advance, and table indexing. Servo-hydraulic systems reduce energy consumption 20\u201340% versus fixed-displacement pumps.<\/p>\n<\/p><\/div>\n<\/div>\n<div style=\"text-align:center;margin-bottom:36px;\">\n  <img decoding=\"async\" src=\"https:\/\/onestepblowmoldingmachine.com\/wp-content\/uploads\/2026\/07\/blowing-nozzle.webp\"\n       alt=\"IBM machine blowing nozzle component used in the blow station for air injection\"\n       style=\"max-width:100%;height:auto;border-radius:8px;box-shadow:0 2px 12px rgba(0,0,0,0.10);\"\n       loading=\"lazy\" width=\"900\" height=\"500\" \/><\/p>\n<p style=\"font-size:13px;color:#777;margin-top:8px;\">Fig 5 \u2014 Precision blowing nozzle: the component that delivers forming air into the preform<\/p>\n<\/div>\n<h2 style=\"font-size:24px;color:#1a3c6e;border-left:4px solid #0057a8;padding-left:14px;margin-top:40px;\">9. Common Process Parameters and How to Adjust Them<\/h2>\n<div style=\"overflow-x:auto;margin:24px 0;\">\n<table style=\"width:100%;border-collapse:collapse;font-size:15px;\">\n<thead>\n<tr>\n<th style=\"background-color:#0057a8;color:white;padding:10px 14px;text-align:left;\">Param\u00e8tre<\/th>\n<th style=\"background-color:#0057a8;color:white;padding:10px 14px;text-align:left;\">Typical Range (PP)<\/th>\n<th style=\"background-color:#0057a8;color:white;padding:10px 14px;text-align:left;\">Effect of Increasing<\/th>\n<th style=\"background-color:#0057a8;color:white;padding:10px 14px;text-align:left;\">Effect of Decreasing<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background:#f4f8ff;\">\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Melt Temperature<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">200\u2013240 \u00b0C<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Better flow, lower stress; risk of degradation<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Short shots, high stress, poor surface<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Injection Pressure<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">800\u20131,400 bar<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Fuller cavity, less sink; risk of flash<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Short shot, sink marks<\/td>\n<\/tr>\n<tr style=\"background:#f4f8ff;\">\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Blow Pressure<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">6\u201310 bar<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Better detail replication; risk of mold wear<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Incomplete inflation, soft corners<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Blow Time<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">2\u20136 s<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Better cooling, less spring-back; longer cycle<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Deformation on ejection<\/td>\n<\/tr>\n<tr style=\"background:#f4f8ff;\">\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Mold Temperature<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">10\u201330 \u00b0C<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Glossier surface; slower cycle<\/td>\n<td style=\"padding:9px 14px;border-bottom:1px solid #dde4f0;\">Faster cycle; risk of stress whitening<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:9px 14px;\">Cycle Time<\/td>\n<td style=\"padding:9px 14px;\">8\u201320 s<\/td>\n<td style=\"padding:9px 14px;\">\u2014<\/td>\n<td style=\"padding:9px 14px;\">Higher output; risk of defects<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2 style=\"font-size:24px;color:#1a3c6e;border-left:4px solid #0057a8;padding-left:14px;margin-top:40px;\">10. Advantages of the IBM Process vs Other Methods<\/h2>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:20px;\">\nIBM distinctive process architecture confers several competitive advantages:<\/p>\n<ul style=\"font-size:16px;line-height:1.8;color:#333;padding-left:20px;margin-bottom:28px;\">\n<li style=\"margin-bottom:10px;\"><strong>No flash or trimming required<\/strong> \u2014 the bottle is formed to net shape, saving secondary operations and material waste.<\/li>\n<li style=\"margin-bottom:10px;\"><strong>Tight neck-finish tolerances<\/strong> \u2014 \u00b10.1 mm or better, critical for pharmaceutical closure integrity.<\/li>\n<li style=\"margin-bottom:10px;\"><strong>Consistent wall thickness<\/strong> \u2014 injection around the core rod ensures controlled parison geometry before blowing.<\/li>\n<li style=\"margin-bottom:10px;\"><strong>High surface quality<\/strong> \u2014 the smooth injection mold surface is reproduced on the bottle body.<\/li>\n<li style=\"margin-bottom:10px;\"><strong>Suitable for complex neck geometries<\/strong> \u2014 roll-on closures, child-resistant caps, and tamper-evident bands are all achievable.<\/li>\n<\/ul>\n<div style=\"text-align:center;margin-bottom:36px;\">\n  <img decoding=\"async\" src=\"https:\/\/onestepblowmoldingmachine.com\/wp-content\/uploads\/2026\/07\/ibm-production-line-components.webp\"\n       alt=\"Complete IBM production line components layout including dryer, chiller and conveyor\"\n       style=\"max-width:100%;height:auto;border-radius:8px;box-shadow:0 2px 12px rgba(0,0,0,0.10);\"\n       loading=\"lazy\" width=\"900\" height=\"500\" \/><\/p>\n<p style=\"font-size:13px;color:#777;margin-top:8px;\">Fig 6 \u2014 Complete IBM production line: machine, dryer, chiller, and downstream handling<\/p>\n<\/div>\n<h2 style=\"font-size:24px;color:#1a3c6e;border-left:4px solid #0057a8;padding-left:14px;margin-top:40px;\">11. Frequently Asked Questions<\/h2>\n<details style=\"border:1px solid #dde4f0;border-radius:6px;padding:14px 18px;margin-bottom:12px;\">\n<summary style=\"font-size:16px;font-weight:600;color:#1a3c6e;cursor:pointer;\">What is the basic principle of injection blow molding?<\/summary>\n<p style=\"font-size:15px;line-height:1.8;color:#444;margin-top:10px;\">The IBM process first injects molten plastic around a steel core rod to form a preform, then transfers the preform to a blow station where pressurised air expands it into the final bottle shape inside a blow mold.<\/p>\n<\/details>\n<details style=\"border:1px solid #dde4f0;border-radius:6px;padding:14px 18px;margin-bottom:12px;\">\n<summary style=\"font-size:16px;font-weight:600;color:#1a3c6e;cursor:pointer;\">How long does one IBM cycle take?<\/summary>\n<p style=\"font-size:15px;line-height:1.8;color:#444;margin-top:10px;\">A typical cycle for small pharmaceutical bottles (10\u201360 ml) runs 8\u201318 seconds, depending on wall thickness, material, and cooling efficiency.<\/p>\n<\/details>\n<details style=\"border:1px solid #dde4f0;border-radius:6px;padding:14px 18px;margin-bottom:12px;\">\n<summary style=\"font-size:16px;font-weight:600;color:#1a3c6e;cursor:pointer;\">What materials can be processed on an IBM machine?<\/summary>\n<p style=\"font-size:15px;line-height:1.8;color:#444;margin-top:10px;\">IBM machines process PP, PE, PET, PVC, and PETG. PP and PE are most common for pharmaceutical and cosmetic bottles.<\/p>\n<\/details>\n<details style=\"border:1px solid #dde4f0;border-radius:6px;padding:14px 18px;margin-bottom:12px;\">\n<summary style=\"font-size:16px;font-weight:600;color:#1a3c6e;cursor:pointer;\">What is the difference between the injection station and the blow station?<\/summary>\n<p style=\"font-size:15px;line-height:1.8;color:#444;margin-top:10px;\">The injection station forms the parison by injecting molten resin into a closed mold around the core rod. The blow station uses compressed air through the core rod to expand the preform against the blow mold walls.<\/p>\n<\/details>\n<details style=\"border:1px solid #dde4f0;border-radius:6px;padding:14px 18px;margin-bottom:12px;\">\n<summary style=\"font-size:16px;font-weight:600;color:#1a3c6e;cursor:pointer;\">Can an IBM machine run multiple cavities simultaneously?<\/summary>\n<p style=\"font-size:15px;line-height:1.8;color:#444;margin-top:10px;\">Yes. Most IBM machines operate with 2, 4, 6, or more cavities per station, allowing simultaneous production of multiple bottles per cycle.<\/p>\n<\/details>\n<details style=\"border:1px solid #dde4f0;border-radius:6px;padding:14px 18px;margin-bottom:12px;\">\n<summary style=\"font-size:16px;font-weight:600;color:#1a3c6e;cursor:pointer;\">Why is cooling important in the IBM process?<\/summary>\n<p style=\"font-size:15px;line-height:1.8;color:#444;margin-top:10px;\">Adequate cooling solidifies the bottle walls before ejection, preventing deformation and ensuring dimensional accuracy. Both the core rod and blow mold incorporate cooling channels.<\/p>\n<\/details>\n<h2 style=\"font-size:24px;color:#1a3c6e;border-left:4px solid #0057a8;padding-left:14px;margin-top:40px;\">12. Conclusion<\/h2>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:16px;\">\nThe injection blow molding process is an elegantly integrated sequence where every station depends on the precision of the one before it. Mastering the relationship between material preparation, preform geometry, blow pressure, and cooling yields bottles that consistently meet tight dimensional and quality standards.\n<\/p>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:24px;\">\nReady to put this knowledge into practice? Explore our full range of <a href=\"\/fr\/products\/ibm-machines\/\" style=\"color:#0057a8;text-decoration:underline;\">injection blow molding machines<\/a> or <a href=\"\/fr\/contact-us\/\" style=\"color:#0057a8;text-decoration:underline;\">Contactez notre \u00e9quipe d'ing\u00e9nieurs<\/a> to discuss your specific bottle requirements and production volume.<\/p>","protected":false},"excerpt":{"rendered":"<p>Home &rsaquo; IBM Machine Blogs &rsaquo; How Does an Injection Blow Molding Machine Work? Understanding exactly how an injection blow molding machine transforms raw plastic pellets into perfectly formed bottles is essential for anyone evaluating equipment, troubleshooting production issues, or optimising an existing line. This guide breaks the entire IBM process into clear, sequential steps [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[36],"tags":[39,38,41,37,40],"class_list":["post-105","post","type-post","status-publish","format-standard","hentry","category-ibm-machine-blogs","tag-blow-molding-steps","tag-ibm-machine-working-principle","tag-injection-blow-mold","tag-injection-blow-molding-process","tag-plastic-bottle-manufacturing"],"_links":{"self":[{"href":"https:\/\/onestepblowmoldingmachine.com\/fr\/wp-json\/wp\/v2\/posts\/105","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/onestepblowmoldingmachine.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/onestepblowmoldingmachine.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/onestepblowmoldingmachine.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/onestepblowmoldingmachine.com\/fr\/wp-json\/wp\/v2\/comments?post=105"}],"version-history":[{"count":0,"href":"https:\/\/onestepblowmoldingmachine.com\/fr\/wp-json\/wp\/v2\/posts\/105\/revisions"}],"wp:attachment":[{"href":"https:\/\/onestepblowmoldingmachine.com\/fr\/wp-json\/wp\/v2\/media?parent=105"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/onestepblowmoldingmachine.com\/fr\/wp-json\/wp\/v2\/categories?post=105"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/onestepblowmoldingmachine.com\/fr\/wp-json\/wp\/v2\/tags?post=105"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}