{"id":448,"date":"2026-04-20T07:16:03","date_gmt":"2026-04-20T07:16:03","guid":{"rendered":"https:\/\/isbm-blow-molding.com\/?post_type=product&p=448"},"modified":"2026-04-20T07:16:04","modified_gmt":"2026-04-20T07:16:04","slug":"custom-one-step-injection-stretch-blow-moulds-isbm","status":"publish","type":"product","link":"https:\/\/isbm-blow-molding.com\/et\/product\/custom-one-step-injection-stretch-blow-moulds-isbm\/","title":{"rendered":"Kohandatud \u00fcheetapilise sissepritsega venituspuhumisvormid (ISBM)"},"content":{"rendered":"
\n

Toote \u00fclevaade<\/h2>\n

The difference between a mediocre and an excellent bottle production line is almost always the tooling. The machine supplies the clamping force, the heat, and the air pressure \u2014 but the shape, clarity, wall thickness, and neck thread accuracy of every bottle you ship comes from the mould. Ever-Power designs and manufactures custom one-step injection stretch blow moulds<\/strong> for Korean and East Asian packaging factories that have outgrown off-the-shelf tooling and need dimensionally precise, machine-matched moulds that drop directly onto their existing ISBM platforms without adapter plates, no re-machining of locating bushings, and no trial-and-error commissioning.<\/p>\n

\"Vorm<\/p>\n

Every injection stretch blow mould<\/strong> we ship is built in-house at our 30,000 square meter Guangdong tool shop, on German 5-axis CNC machining centers and Sodick precision EDM wire-cutters. We hold steel inventory in seven standard mould-base grades \u2014 S136, H13, 718H, 2316, P20, NAK80, and Aluminum 7075 \u2014 so we can start pre-machining within 48 hours of design sign-off. The full cycle from approved CAD to validated mould typically runs 35 to 55 working days depending on cavity count and geometric complexity, which is roughly 40 percent faster than the Japanese OEM equivalent and 60 percent faster than European moulds. Every finished mould undergoes a trial-molding validation run on our in-house ISBM machine with your specified resin before it leaves the factory.<\/p>\n

\"Sissepritsega<\/p>\n

Machine compatibility is the single question Korean buyers ask most often. We build custom moulds that drop directly onto all common ISBM platforms including Japanese ASB-12M, ASB-50MB, ASB-70DPH, ASB-70DPW, Nissei ASB, AOKI 250, AOKI 350, as well as Ever-Power’s own HGY and BPET machine families. When you upgrade from an aging Japanese machine to a new Korean-accessible Ever-Power platform, the investment you have in existing moulds does not need to be written off \u2014 we verify dimensional compatibility from your legacy tooling drawings and, if needed, build platen adapter plates at cost. For greenfield projects where you bring only the finished-bottle drawing, our engineering team runs stretch-ratio simulation, preform weight optimization, and cavitation planning before cutting any steel.<\/p>\n

Cavity count capability ranges from single-cavity 5 L bulk water gallon moulds up to 28-cavity micro-dropper tooling for pharmaceutical applications, limited only by the physical platen dimensions of your receiving machine. Typical Korean cosmetic and pharma applications sit in the 4 to 12 cavity range, while high-volume beverage and household chemical plants often run 8 to 16 cavity tooling. Wall thickness holds within 0.05 mm variance across cavity sets, neck thread tolerance stays within 0.02 mm on critical dimensions, and surface finish reaches SPI A-1 (Ra 0.05) mirror polish on cavities where glass-like clarity is required for premium PETG and PCTG cosmetic packaging.<\/p>\n

<\/p>\n

Mould Components Anatomy \u2014 The Four Critical Assemblies<\/h2>\n

A complete one-step ISBM mould set comprises four distinct assemblies, each machined from different steel grades for different mechanical requirements. Understanding how these assemblies work together is the first step in specifying the right mould for your application.<\/p>\n

\"survevalu-venitus-puhumisvormimise-paigutus-1\"<\/p>\n

1. Preform Injection Cavity<\/h3>\n

This is where molten resin is injection-moulded around the core rod to form the preform \u2014 the test-tube-shaped intermediate that will become the final bottle. The cavity defines the preform body profile, wall thickness, and neck finish geometry. Because the neck finish is fully formed at this stage and never reshaped later, this is the single most critical mould component for thread tolerance and capping reliability. We machine preform cavities from S136 stainless steel vacuum-quenched to HRC 48-52, polished to Ra 0.05 on clarity-critical surfaces. For heavy-duty PET and rPET applications exceeding 3 million shots annually, we upgrade to H13 tool steel at HRC 52-54 for extended wear life.<\/p>\n

2. Core Rod Assembly (Mandrel)<\/h3>\n

The core rod carries the hot preform from the injection station through the subsequent stretch-blow stations, and it also forms the interior of the preform during injection. Dimensional precision here is absolute: any deviation on the core rod diameter translates directly into bottle wall thickness variance. We manufacture core rods from 718H pre-hardened tool steel (HRC 30-35) for most applications, stepping up to Cr12MoV cold-work steel at HRC 58-60 for aggressive high-cycle production. Internal cooling channels inside each core rod are deep-hole-drilled on a Mori Seiki BTA machine to maintain straightness within 0.03 mm over the full length.<\/p>\n

3. Blow Cavity Mould<\/h3>\n

The blow cavity defines the final external bottle shape \u2014 body profile, base geometry, label panel, grip contours. It opens and closes on every cycle to release the finished bottle, so mating surface precision determines whether flashing appears at parting lines. We machine blow cavities from either S136 stainless (for long-life production) or Aluminum 7075-T6 (for short-run or rapidly-changing cosmetic geometries where weight reduction matters for the machine’s servo indexing system). Conformal cooling channels wrap around complex bottle contours to extract heat 15 to 20 percent faster than straight-drilled lines, directly reducing cycle time.<\/p>\n

4. Hot Runner Manifold System<\/h3>\n

The hot runner system distributes molten resin from the machine’s plasticizing screw to each cavity in a multi-cavity mould. In single-cavity moulds this is a simpler nozzle, but in 12-cavity or 24-cavity tooling the manifold becomes the single largest determinant of fill balance and bottle-to-bottle consistency. We use a standard S45C mounting base in dimensions matched to the customer’s machine \u2014 for example, one 15 ml dropper bottle mould we recently built for a Korean pharmaceutical client used a 430 \u00d7 140 \u00d7 30 mm hot runner base with 4 through-bore mounting holes of \u00d814 mm, dimensioned for direct drop-onto an ASB-12M platen. The manifold itself integrates Yudo or Hasco-equivalent hot runner nozzles with PID-controlled heating and chrome-plated internal flow paths to prevent resin degradation at the mould’s idle zones.<\/p>\n

Mould Steel Materials \u2014 Picking the Right Grade<\/h2>\n

Mould steel selection is the single biggest factor in long-term production economics. A premium steel costs 30 to 50 percent more upfront but lasts 3 to 5 times longer in production, reducing total cost of ownership substantially. We keep the following seven grades in inventory for Korean customer orders, with steel grade specified per-component based on your annual production volume and resin characteristics.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n
Terase klass<\/th>\nEquivalent Standard<\/th>\nK\u00f5vadus<\/th>\nParima jaoks<\/th>\n<\/tr>\n<\/thead>\n
S136<\/td>\nDIN 1.2083<\/td>\nHRC 48-52<\/td>\nClarity-critical cosmetic PETG cavities, mirror-polish applications<\/td>\n<\/tr>\n
H13<\/td>\nDIN 1.2344<\/td>\nHRC 52-54<\/td>\nHeavy-duty PET and rPET, high-cycle beverage production<\/td>\n<\/tr>\n
718H<\/td>\nDIN 1.2738H<\/td>\nHRC 30-35<\/td>\nCore rods and mid-life preform cavities, general-purpose<\/td>\n<\/tr>\n
2316<\/td>\nDIN 1.2316<\/td>\nHRC 30-34<\/td>\nCorrosion-resistant applications, PVC and acid-reactive resins<\/td>\n<\/tr>\n
P20<\/td>\nDIN 1.2311<\/td>\nHRC 28-33<\/td>\nMould bases, platen backing plates<\/td>\n<\/tr>\n
NAK80<\/td>\nJIS G4404<\/td>\nHRC 37-43<\/td>\nAlternative to S136 where weldability matters for rework<\/td>\n<\/tr>\n
Al 7075-T6<\/td>\nEN AW-7075<\/td>\nHB 150<\/td>\nShort-run cosmetic blow cavities, weight-reduction priority<\/td>\n<\/tr>\n
S45C<\/td>\nJIS G4051<\/td>\nHB 190-230<\/td>\nHot runner mounting bases, non-critical structural components<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

A well-specified mould set typically mixes four to five steel grades across different components \u2014 S136 for the clarity-critical preform cavity, H13 for the blow cavity on long-cycle production, 718H for core rods, P20 for the base plates, and S45C for the hot runner mounting base. Our engineering team recommends the optimal combination for your specific bottle drawing and annual volume after reviewing your resin specification and target production schedule.<\/p>\n

<\/p>\n

Machine Compatibility Matrix<\/h2>\n

Every kohandatud ISBM vorm<\/strong> we build is dimensioned for a specific receiving machine. Below is the compatibility matrix covering the Japanese, European, and Korean platforms most commonly encountered in East Asian packaging factories. If your machine is not listed, send us the platen drawings and we will verify tie-bar spacing, core-rod pitch, and nozzle interface before quoting.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n
Masina platvorm<\/th>\nP\u00e4ritolu<\/th>\nJaamad<\/th>\nDrop-In Compatibility<\/th>\n<\/tr>\n<\/thead>\n
ASB-12M<\/td>\nJapan (Nissei ASB)<\/td>\n4<\/td>\nFull drop-in; native platen interface<\/td>\n<\/tr>\n
ASB-50MB<\/td>\nJapan (Nissei ASB)<\/td>\n3 \/ 4<\/td>\nFull drop-in; verified for both 3-station and 4-station configurations<\/td>\n<\/tr>\n
ASB-70DPH<\/td>\nJapan (Nissei ASB)<\/td>\n4<\/td>\nFull drop-in; heavy-duty version of ASB-70 series<\/td>\n<\/tr>\n
ASB-70DPW<\/td>\nJapan (Nissei ASB)<\/td>\n4<\/td>\nFull drop-in; wide-mouth variant up to 148 mm neck<\/td>\n<\/tr>\n
AOKI 250<\/td>\nJapan (AOKI)<\/td>\n3<\/td>\nFull drop-in; matched neck ring and core rod pitch<\/td>\n<\/tr>\n
AOKI 350<\/td>\nJapan (AOKI)<\/td>\n3 \/ 4<\/td>\nFull drop-in; custom flange adapter available if needed<\/td>\n<\/tr>\n
Legacy European 3\/4-station<\/td>\nEurope (various)<\/td>\n3 \/ 4<\/td>\nAdapter plates built at cost; drawings required for verification<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

Cavity Count Range & Typical Bottle Specifications<\/h2>\n

Cavitation is a joint decision between the mould designer, the machine specifications, and the customer’s annual production volume. The table below summarizes the practical envelope we typically deliver, though custom configurations outside these ranges are feasible with specialized machine platforms.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n
\u00d5\u00f5nsuste arv<\/th>\nTypical Bottle Volume<\/th>\nT\u00fc\u00fcpiline rakendus<\/th>\nRecommended Machine<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\n2 L \u2013 5 L<\/td>\nBulk water gallons, food jars, chemical containers<\/td>\nBPET-125V4, HGY250-V4<\/td>\n<\/tr>\n
2<\/td>\n1 L \u2013 3 L<\/td>\nKimchi jars, cooking oil, bulk detergent<\/td>\nBPET-94V3, HGY200-V4<\/td>\n<\/tr>\n
4<\/td>\n500 ml \u2013 1.5 L<\/td>\nBeverage bottles, cosmetic lotion, household chemical<\/td>\nBPET-70V4, HGY150-V4<\/td>\n<\/tr>\n
6<\/td>\n250 ml \u2013 800 ml<\/td>\nK-beauty serum, pharmaceutical vials, spray bottles<\/td>\nHGY150-V4, BPET-94V3<\/td>\n<\/tr>\n
8<\/td>\n100 ml \u2013 500 ml<\/td>\nSmall cosmetic bottles, eye-drop vials, sample bottles<\/td>\nHGY200-V4, BPET-94V3, HGYS280-V6<\/td>\n<\/tr>\n
12<\/td>\n50 ml \u2013 200 ml<\/td>\nPharmaceutical dropper bottles, travel-size cosmetics<\/td>\nBPET-125V4, HGYS280-V6<\/td>\n<\/tr>\n
16<\/td>\n30 ml \u2013 120 ml<\/td>\nHotel amenity bottles, injection ampoules, small dropper<\/td>\nHGY250-V4, HGY650-V4<\/td>\n<\/tr>\n
24 \u2013 28<\/td>\n5 ml \u2013 50 ml<\/td>\nMicro pharmaceutical vials, unit-dose eye drops<\/td>\nHGY650-V4, specialty platforms<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

6-Step Custom Manufacturing Workflow<\/h2>\n

From the day your bottle design is signed off, the full custom injection stretch blow mould<\/strong> manufacturing cycle runs 35 to 55 working days depending on cavity count and geometric complexity. The six-step workflow below is what every project goes through, with documented sign-off checkpoints between each phase.<\/p>\n

Step 1 \u2014 Design Review & Feasibility Analysis (2 \u2013 5 Days)<\/h3>\n

You send us a 3D STEP file or physical bottle sample, plus target annual volume, resin specification, and receiving machine model. Our engineering team reviews the geometry for stretch-blow feasibility, flags any unusual design features (sharp corners, extreme aspect ratios, thin wall sections), and recommends the optimal cavity count for your volume target. A written feasibility report with preform-weight calculation returns within 3 working days.<\/p>\n

Step 2 \u2014 3D CAD Modeling & Flow Simulation (3 \u2013 7 Days)<\/h3>\n

With the feasibility sign-off, our CAD team builds the full 3D mould model including preform cavity, core rod profile, blow cavity, hot runner manifold, and cooling channel layout. Moldflow and stretch-ratio simulation identify potential wall-thickness issues before any steel is cut. You receive the 3D model for design approval, typically with one round of revisions before proceeding.<\/p>\n

Step 3 \u2014 Steel Procurement & Pre-Machining (5 \u2013 10 Days)<\/h3>\n

We hold inventory of S136, H13, 718H, P20, NAK80, and S45C in common block sizes, so pre-machining starts within 48 hours of CAD approval. Rough machining removes 90 percent of material on 5-axis CNC centers with automated tool changers, after which the blanks move to deep-hole drilling for cooling channels. For premium S136 and H13 grades on critical cavity components, vacuum quenching follows to reach the target hardness.<\/p>\n

Step 4 \u2014 Precision 5-Axis CNC Machining & EDM (15 \u2013 20 Days)<\/h3>\n

Finish machining on German DMG Mori 5-axis centers brings dimensional tolerances within \u00b10.01 mm on critical neck and gate geometries. Sodick wire-cut EDM handles the fine features that milling cannot reach, including ejector holes, vent slots, and radius details. Every CNC-finished component passes through our Zeiss CMM measurement station for dimensional verification before moving to the polishing cell.<\/p>\n

Step 5 \u2014 Polishing & Heat Treatment (7 \u2013 10 Days)<\/h3>\n

Clarity-critical surfaces on preform cavities and blow cavities undergo manual diamond-paste polishing to reach SPI A-1 (Ra 0.05) optical mirror finish. This step cannot be automated \u2014 it depends on trained hand-polishers who spend 8 to 20 hours per cavity depending on complexity. Non-critical surfaces receive SPI B-2 or B-3 finish. Final heat treatment stabilizes dimensional accuracy before assembly.<\/p>\n

Step 6 \u2014 Trial Molding & Validation (3 \u2013 5 Days)<\/h3>\n

Before shipment, every mould runs a trial-molding validation on our in-house ISBM machine using your specified resin and target preform weight. First-article bottles go through dimensional CMM inspection, wall-thickness profiling, and optical clarity assessment. The validation report \u2014 including sample bottles, measurement data, and cycle-time verification \u2014 ships with the mould to your factory for final acceptance.<\/p>\n

\"Vorm<\/p>\n

Applications by Industry<\/h2>\n

Over the past three years, Korean and East Asian customer orders have clustered into five industry verticals, each with distinct technical priorities. Below is how we approach the custom bottle mould<\/strong> specification differently for each sector.<\/p>\n

K-ilu- ja esmaklassiliste kosmeetikatoodete pakendid<\/h3>\n

Korean cosmetic brands demand glass-clarity surface finish on PETG and PCTG serum bottles, cream jars, and toner flacons. For this sector we specify S136 stainless cavities polished to Ra 0.05 on all clarity-critical surfaces, with special attention to neck-thread precision for automated capping line compatibility. Short-run K-beauty product launches (20,000 to 100,000 units per campaign) are typical, so we optimize changeover-friendliness with quick-release clamps on the preform mould. Typical configurations are 4 to 8 cavity on bottles between 30 ml and 200 ml.<\/p>\n

\u00a0\u00a0 \"pudel-8\"<\/p>\n

Pharmaceutical Eye-Drop & Syrup Vials<\/h3>\n

Pharmaceutical packaging requires absolute dimensional precision for tamper-evident sealing and child-proof closures. Neck-thread tolerance is held within 0.02 mm using Zeiss CMM verification on every cavity before shipment. For GMP cleanroom-compatible production, we specify 2316 corrosion-resistant stainless steel for any components that contact wash-down solutions. Typical Korean pharma projects run 8 to 16 cavity on 5 ml to 120 ml vials, and the example 15 ml 12M 1\u00d76 dropper bottle mould we recently built for a Daejeon pharmaceutical client is a representative specimen of this category.<\/p>\n

\"pudel-3\"<\/p>\n

Beverage & Mineral Water Bottles<\/h3>\n

High-volume beverage production (1 million+ bottles per year per SKU) demands long-life tooling with robust wear resistance. Here we specify H13 tool steel at HRC 52-54 for preform cavities and blow cavities, with deep-hole-drilled conformal cooling channels to minimize cycle time. For recycled PET (rPET) processing, chrome-plated internal surfaces on the hot runner manifold protect against abrasive contaminants. Typical configurations are 4 to 8 cavity on bottles between 500 ml and 2 L.<\/p>\n

\"pudel-4\"<\/p>\n

Wide-Mouth Food Jars & Kimchi Containers<\/h3>\n

Korean kimchi, gochujang, honey, and sauce jars with neck diameters up to 148 mm present a structurally different tooling challenge. The projected mould area is 3 to 5 times larger than standard cosmetic bottles, which means the blow clamping force must hold correspondingly. We build P20 mould bases thick enough to resist deflection under 300+ KN blow clamping, and we specify oversized parting-line gaps with fine-tuned venting to prevent flashing. Typical configurations are 1 to 2 cavity on jars between 500 ml and 3 L.<\/p>\n

\"pudel-6\"<\/p>\n

BPA-Free Baby Bottles & Infant Care Packaging<\/h3>\n

Tritan, PCTG, and PPSU baby bottle production demands thermally stable hot runner systems because these resins process within narrow temperature windows (typically 260 to 340 Celsius depending on grade). We specify Yudo-equivalent hot runner nozzles with individual PID control per cavity, chrome-plated flow paths to eliminate dead zones, and nickel-alloy barrel liners for PPSU applications exceeding 310 Celsius. Typical configurations are 4 to 8 cavity on bottles between 150 ml and 330 ml.<\/p>\n

\"pudel-5\"<\/p>\n

<\/p>\n

Quality Control & Pre-Shipment Testing<\/h2>\n

Every injection stretch blow mould<\/strong> leaves our factory only after passing four dimensional and functional verification steps. The written QC report ships with the mould to your factory, and all data is retained in our QMS for warranty traceability.<\/p>\n