What is the difference between a PET preform injection molding machine and a PET blow molding machine?

The injection molding machine makes the preform from raw plastic pellets through melting and high-pressure injection into a mold. The blow molding machine takes that cooled, solid preform, reheats it in an infrared oven, stretches it with a stretch rod, and inflates it with high-pressure air (up to 35-40 bar) to form the final bottle. They operate in series as a two-stage process; Sailwin manufactures both machines for matched turnkey lines.

Can a PET preform injection molding machine process PP material as well?

Yes. While specifically optimized for PET processing, the SW-P machine can run Polypropylene (PP) and High-Density Polyethylene (HDPE) preforms with minor temperature setting adjustments on the PLC controller. For customers intending to switch frequently between PET and PP/HDPE, Sailwin supplies universal bimetallic screws tailored for multi-polymer processing.

How to choose a reliable PET preform injection molding machine manufacturer?

Key criteria when choosing a manufacturer include: 1) Verify that the screw is specifically designed for PET (not a generic plastic screw); 2) Check clamping force rigidity and enlarged ejector cylinder capacity; 3) Confirm brand authenticity for servo drives and hydraulic valves; 4) Ensure the manufacturer offers matched preform mold design and turnkey integration with downstream blow molders. Sailwin provides end-to-end support with over 15 years of bottle machinery export experience.

PET preform injection molding machine factory Sailwin SW-P series

SAILWIN · SW-P SERIES · CE CERTIFIED

PET Preform Injection Molding Machine — 14 Models, 170–5500 kN

Q: What is a PET preform injection molding machine?

A PET preform injection molding machine is a specialized plastic injection molding system designed exclusively to melt polyethylene terephthalate (PET) granules and inject them into precision multi-cavity molds to produce preforms (test-tube shaped intermediate parts). These preforms are subsequently reheated and blown into finished plastic bottles using a stretch blow molding machine (two-step method). Sailwin SW-P series preform machines feature dedicated high-mixing screws and far-infrared nano heaters to guarantee crystal clarity and low AA values.

Q: How much does a PET preform injection molding machine cost?

The price of a PET preform injection molding machine depends on clamping tonnage (170T to 550T), screw configuration, servo drive system and mold cavity count (8 to 64 cavities). Small-scale turnkey systems start from attractive factory-direct pricing, while high-output 48/64-cavity high-speed lines represent larger industrial capital investments. Contact Sailwin with your target preform weight, neck finish, and daily capacity for a customized FOB/CIF quotation within 24 hours.

Q: How many cavities can a PET preform injection molding machine accommodate?

Depending on clamping force and platen tie-bar spacing, Sailwin SW-P series supports from 4 to 64 cavities. For example, our SW-P170 typically accommodates 8 to 16 cavities; the SW-P228 runs 16 to 24 cavities; the SW-P300 handles 24 to 32 cavities; and our heavy-duty SW-P550-S5500 supports 48 to 64-cavity valve-gate hot runner molds.

Q: What is the typical cycle time of a PET preform injection molding machine?

Cycle time depends on preform wall thickness, neck diameter and cooling efficiency. For standard 14g to 20g water bottle preforms with optimized chilled-water mold circuits, typical cycle times range from 10 to 14 seconds. Heavier preforms (e.g. 35g CSD or 120g wide-mouth jars) require longer cooling times between 18 and 30 seconds. Models equipped with electric pre-plasticizing (PET-E) shorten cycles further by plasticizing during mold opening.

Q: Can I order preform molds together with the injection machine from Sailwin?

Yes, Sailwin supplies complete matched mold packages including valve-gate hot runner preform molds (P20/S136 stainless steel mold base, beryllium copper inserts), dehumidifying dryer, mold chiller, auto-loader, and robot arm. The entire line is fully assembled and tested together before dispatch, avoiding compatibility issues at your factory.

Engineered specifically for high-efficiency PET preform production. Shot weights from 354g up to 4,815g, dedicated plasticizing screw with far-infrared nano heaters, servo energy saving 30–50%, and up to 64-cavity hot runner mold support.

⚙️ Specifications 🧴 Applications 💡 Core Technology 🏭 Turnkey Line ❓ FAQ

💬 Chat on WhatsApp

14 Models

SW-P138 to SW-P550 Full Range

5,500 kN

Maximum Clamping Force

30%–50%

Servo Power Energy Saving

Up to 64 Cavity

Valve Gate Hot Runner Mold

FACTORY-DIRECT LINEUP

SW-P Series PET Preform Injection Molding Machine Models & Specifications

From flexible small-lot cosmetic jar runs to high-volume 64-cavity beverage bottle water plants, Sailwin offers 14 precision-engineered PET preform making machine models with clamping forces from 1,380 to 5,500 kN.

ENTRY-LEVEL BESTSELLER SW-P170 PET preform injection molding machine small to medium output

SW-P170

Ideal for startup preform producers, small water bottle plants and specialty bottle molders.

Clamping Force: 1,700 kN (170 T)

PET Shot Weight: 526 g (50mm screw)

Tie-Bar Space: 470 × 470 mm

Typical Mold: 8–16 Cavities

★ MOST POPULAR MODEL SW-P228 PET preform injection molding machine hot selling model

SW-P228

Optimal price-to-performance ratio for commercial 500ml/1.5L beverage and edible oil preforms.

Clamping Force: 2,280 kN (228 T)

PET Shot Weight: 826 g (60mm screw)

Tie-Bar Space: 530 × 530 mm

Typical Mold: 16–24 Cavities

HIGH OUTPUT PRODUCTION SW-P300 24-cavity PET preform injection molding machine high speed

SW-P300

Designed for large beverage plants demanding fast cycle times, 24-cavity molds and 24/7 reliability.

Clamping Force: 3,000 kN (300 T)

PET Shot Weight: 1,384 g (70mm screw)

Tie-Bar Space: 630 × 630 mm

Typical Mold: 24–32 Cavities

Table 1: Small to Medium Series (1,380 – 3,000 kN)

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Parameter	Unit	SW-P138	SW-P170	SW-P188	SW-P200	SW-P228	SW-P268	SW-P300
Screw Diameter	mm	45	50	55	55	60	65	70
Theoretical Shot Volume	cm³	273	439	460	499	635	928	1,154
PET Shot Weight	g	354	526	552	598	826	1,207	1,384
Injection Rate	g/s	280	356	408	408	486	561	595
Injection Pressure	MPa	147	118	110	110	103	112	115
Screw Speed	rpm	0–185	0–185	0–180	0–180	0–175	0–170	0–165
Clamping Force	kN	1,380	1,700	1,880	2,000	2,280	2,680	3,000
Opening Stroke	mm	395	450	440	445	490	550	590
Distance Between Tie Bars	mm	420×420	470×470	480×480	525×465	530×530	580×580	630×630
Max / Min Mold Thickness	mm	430 / 130	510 / 180	600 / 160	600 / 230	560 / 200	620 / 220	670 / 250
Ejector Stroke / Force	mm / kN	110 / 46	130 / 46	132 / 50	130 / 50	145 / 70	150 / 90	160 / 70
Pump Motor Power	kW	18.5	22	22	22	30	37	37
Machine Dimensions (L×W×H)	m	4.6×1.28×1.92	5.35×1.43×2.2	5.4×1.4×2.2	5.5×1.4×1.85	6.3×1.5×2.14	6.75×1.64×2.2	6.98×1.75×2.3
Machine Weight	T	3.9	5.5	5.4	6.6	7.1	8.3	9.6

Table 2: Large & High-Tonnage Series (3,680 – 5,500 kN)

Supports up to 48 & 64 cavity preform molds

Parameter	Unit	SW-P368	SW-P380	SW-P400	SW-P450	SW-P530	SW-P550	SW-P550-S5500
Screw Diameter	mm	75	80	85	90	90	95	110
Theoretical Shot Volume	cm³	1,413	1,708	2,099	2,416	2,416	2,763	3,705
PET Shot Weight	g	1,836	2,050	2,518	2,900	3,141	3,591	4,815
Injection Rate	g/s	615	650	714	765	803	803	803
Clamping Force	kN	3,680	3,800	4,000	4,500	5,300	5,500	5,500
Opening Stroke	mm	630	669	710	770	770	860	860
Distance Between Tie Bars	mm	680×680	730×670	730×730	760×760	830×830	870×810	870×810
Max / Min Mold Thickness	mm	700 / 280	720 / 270	750 / 250	800 / 300	810 / 350	830 / 330	830 / 330
Ejector Stroke / Force	mm / kN	160 / 89	160 / 70	180 / 110	200 / 110	240 / 150	226 / 150	226 / 150
Pump Motor Power	kW	45	45	55	55	75	75	75
Machine Dimensions (L×W×H)	m	7.3×1.92×2.3	7.3×1.92×2.3	7.8×2.0×2.35	8.3×2.0×2.4	8.4×2.1×2.45	9.4×2.1×2.45	9.4×2.1×2.45
Machine Weight	T	12.5	12.5	14.0	16.0	21.0	24.0	24.0

Need Custom Mold Design or Complete Auxiliaries Package?

Sailwin provides tailored screw geometries, valve-gate preform molds (8 to 64 cavity), hopper dryers, chillers and robot take-out arms.

VERSATILE PRODUCTION

PET Preform Injection Molding Machine Applications

Preform quality directly dictates bottle transparency, burst pressure and top-load strength. Sailwin SW-P series handles shot weights from 360g to 5,400g across beverage, food, cosmetics and heavy-duty industrial water container sectors.

PET preform samples produced by pet preform injection molding machine

Universal Neck Finish & Weight Adaptability

PCO 1810, 1881, 29/25, 38mm Bericap, 48mm, and 55mm 5-gallon neck preforms with low AA value and crystal clarity.

PET preform injection molding machine for water bottle preforms

BEVERAGE & WATER

Water & Mineral Bottle Preforms

For 330ml–2L still water bottles. Neck finish PCO 1881 / 29/25. Lightweight design with high plasticizing rate, low acetaldehyde (AA < 3 ppm) and maximum bottle transparency.

Downstream Match: PET Water Bottle Blowing Machine →

CARBONATED DRINKS

CSD Carbonated Bottle Preforms

Heavy-wall preforms engineered for high CO₂ retention and burst pressure. Uniform wall thickness distribution prevents bottom blow-out in carbonated soft drink containers.

Downstream Match: CSD Bottle Blow Molding Machine →

PET preform injection molding machine for wide-neck jar and cosmetic bottle preforms

COSMETICS & JARS

Wide-Neck Jars & Cosmetic Bottles

Handles wide-mouth preforms up to 83mm diameter. Specialized plasticizing unit supports pearlized, colored and glitter additives without streak defects or gate crystallization.

Downstream Match: Wide Neck PET Jar Machine →

PET preform injection molding machine for 5-gallon bottle preforms

LARGE CONTAINERS

5-Gallon Large Water Bottle Preforms

For 650g–800g heavy 5-gallon preforms with 55mm neck. High-clamping SW-P450 / SW-P550 models ensure bubble-free, stress-relieved thick-wall molding.

Downstream Match: 5-Gallon Blow Molding Machine →

PET preform injection molding machine for hot-fill and edible oil bottle preforms

EDIBLE OIL & HOT FILL

Edible Oil & Hot-Fill Preforms

Specially configured for 3L–5L cooking oil bottle preforms (integral or snap-on handle design) and crystallized neck finish preforms suitable for 85°C–92°C hot filling lines.

Downstream Match: Edible Oil Bottle Blow Machine →

PROVEN ENGINEERING

Core Technology of Our PET Preform Injection Molding Machine

Processing PET resin presents strict challenges: moisture sensitivity, thermal degradation, yellowing and high acetaldehyde generation. Sailwin's SW-P series integrates dedicated hardware to guarantee peak optical quality at minimal kWh per kilogram.

PLASTICIZING INNOVATION

1. Dedicated PET Screw & Far-Infrared Nano Heating Coils

Equipped with an optimal L/D ratio screw with enhanced barrier and mixing zones. Standard equipped with far-infrared nano heating bands that directly radiate thermal energy into the barrel, speeding up plasticizing by 25% while lowering surface radiation heat loss.

Lowers melt temperature to suppress Acetaldehyde (AA) value formation
Eliminates black specks and un-melted resin streaks
Improves preform optical transparency and eliminates bottom gate hazing
Saves up to 30% heating electrical consumption compared with ceramic bands

PET preform injection molding machine PET screw with far-infrared nano heating coil

PET preform injection molding machine electroplastic injection unit

CYCLE TIME REDUCTION

2. Electro-Plasticizing (PET-E) & High-Response Servo Power

On our electric pre-plasticizing configuration, plasticizing is driven by an independent servo electric motor. Plasticizing runs synchronously during mold opening, part ejection and mold clamping, drastically shaving idle cycle seconds off high-volume production.

High-precision load-sensing servo motor matches instantaneous hydraulic pressure demand
Overall machine power consumption cut by 30% to 50% compared with standard hydraulic pumps
Smooth mold clamping and rapid deceleration reduces mold maintenance frequency
Enlarged hydraulic oil cooler maintains stable oil temperature in 45°C ambient tropical climates

3. Reinforced Ejection Force & Stroke Tailored for Preform Stripping

Preforms feature steep taper angles and deep core pins that require significantly greater ejection torque than standard injection molded parts. Sailwin SW-P clamping platens feature enlarged multi-point ejector cylinders, extended ejector strokes (up to 240mm) and high ejection force (up to 150 kN), ensuring instantaneous, jam-free release on multi-cavity stripper plate molds.

SYSTEM ARCHITECTURE

Standard Configuration of the PET Preform Machine

Every SW-P machine leaves our assembly plant fully integrated with industrial-grade electrical, hydraulic and mechanical safeguards designed for continuous industrial operation.

⚡

Servo-Hydraulic Drive System

Permanent-magnet synchronous servo motor paired with internal gear pump. Near-instantaneous 0.05s pressure ramp-up, exceptionally low noise below 75 dB(A) and minimal hydraulic heating.

🖥️

Intelligent Computer Controller

10-inch color touchscreen with multi-language interface (English, Spanish, Arabic, Russian, French). 120-set mold data memory, real-time injection curve monitoring and USB recipe export.

🔥

Nano Infrared Temperature Zones

Independent PID multi-stage temperature control with solid-state relay (SSR). Precision ±1°C accuracy eliminates localized thermal degradation in temperature-sensitive PET polymers.

🛡️

Low-Pressure Mold Protection

High-sensitivity optical and hydraulic mold safety circuit halts platen movement instantly if any stuck preform or foreign object is detected between mold plates, safeguarding multi-cavity tooling.

💧

Automated Volumetric Lubrication

Centralized quantitative lubrication pump with oil-pressure feedback distributor delivers precise metered lubrication to all toggle pins and sliding bushings, extending linkage lifespan over 10 years.

🤖

Euromap 67 Robot Interface

Pre-wired standard Euromap 67 / Euromap 12 communication plug allows seamless plug-and-play synchronization with take-out robots, conveyor belts and visual inspection sorting equipment.

PREMIUM SUPPLY CHAIN

Key Components — Built for Long Service Life

Sailwin partners with world-renowned motion, hydraulic and electrical automation component suppliers. All machines utilize genuine tier-1 components ensuring worldwide availability of replacement parts.

1. PLC & Motion Controller

Available: Siemens / Mitsubishi / Techmation

Industrial-grade CPU with millisecond bus response, optical isolation and robust resistance against voltage fluctuations.

2. Servo Motors & Drives

Available: Inovance / Phase / Yaskawa / Delta

High-torque permanent magnet servo system delivering instant acceleration and precise closed-loop speed control.

3. Hydraulic Valves & Pumps

Available: Rexroth (Bosch) / Yuken / Vickers

Proportional direction and relief valves maintain laminar hydraulic flow with low pressure drop and long valve seal life.

4. Pneumatic & Air Control

Available: Festo / SMC / AirTAC

Precision pneumatic valves for core puller and mold valve gate actuation, tested for over 5 million cycle life.

5. Low-Voltage Electricals

Available: Schneider Electric / Omron / ABB

CE-certified contactors, circuit breakers, emergency stop relays and optical safety curtains.

6. Plasticizing Screw & Barrel

Bimetallic Alloy / Nitrided 38CrMoAlA

Tough alloy flight surfacing with Rockwell hardness > 60 HRC, resisting wear from PET resin friction and colorants.

🛡️

3-Year Warranty on Machine Platens & Toggle Linkages

12-month full machine warranty + lifetime overseas online technical dispatch and video diagnostic support.

END-TO-END TURNKEY SOLUTION

Complete PET Bottle Production Line — From Resin Pellets to Finished Bottles

Sourcing preform injection machines, stretch blow molders, and bottling lines from separate vendors often causes mold mismatch, interface disputes and post-sale finger-pointing. Sailwin supplies fully engineered complete turnkey lines under single-vendor responsibility.

complete pet bottle production line preform injection and blow molding Sailwin

STEP 01 Preform Injection Molding

Raw PET resin is dried in dehumidifying hopper dryers, fed into our SW-P series machine and molded into crystal-clear bottle preforms.

STEP 02 Stretch Blow Molding

Preforms are transferred into Sailwin fully automatic linear stretch blow molders (2 to 8 cavities, up to 12,000 BPH) and blown into final bottles.

STEP 03 Filling & Capping

Freshly blown bottles enter Sailwin monoblock rinsing-filling-capping lines for pure water, carbonated soft drinks, juice or cooking oil.

STEP 04 Labeling & Packaging

Rotary hot-melt OPP labelers or shrink sleeve labelers apply labels, followed by automatic case packers or film shrink wrappers.

Planning a New Bottled Water or Beverage Plant?

Provide your target bottle drawings, hourly capacity requirements and factory workshop dimensions — Sailwin engineers deliver a complete 2D/3D plant layout and machinery quotation within 48 hours.

INTERNATIONAL COMPLIANCE

Certified Quality & Global Manufacturing Strength

Based in Taizhou, China — the machinery manufacturing capital — Sailwin operates standardized ISO 9001 certified production lines with strict 72-hour continuous pre-shipment mold testing.

sailwin machinery CE ISO certification blow molding injection machine

60+

Export Countries Worldwide

72 Hours

Continuous Dry Run Testing

ISO 9001

Quality Management System

CE Directive

European Safety Certified

Every preform machine undergoes dry cycle test runs, hydraulic pressure load tests and mold trial validation with customer resin before packing. We support factory acceptance tests (FAT) via high-definition live video broadcast.

📹 Schedule a Live Video Factory Tour

KNOWLEDGE BASE

Frequently Asked Questions About PET Preform Injection Molding Machine

What is a PET preform injection molding machine? +

A PET preform injection molding machine is a specialized system that melts PET resin and injects it into precision multi-cavity molds to make test-tube shaped preforms. In two-step bottle production, these preforms are then blown into bottles on stretch blow molding machines. Sailwin SW-P models feature dedicated screws and far-infrared nano heaters to guarantee low AA values and crystal clarity.

How much does a PET preform injection molding machine cost? +

Pricing varies based on clamping force (1,380 to 5,500 kN), shot capacity and mold cavity count (8 to 64 cavity). Compact models (SW-P170) provide an economical entry point for growing startups, whereas large 48/64-cavity high-speed lines are designed for large bottling plants. Contact Sailwin for an itemized factory price quotation.

What is the difference between a preform injection machine and a blow molding machine? +

The injection machine molds the solid preform with precision threaded neck finish from plastic pellets. The stretch blow molding machine takes that preform, reheats it, and stretches it into the hollow bottle. They work hand-in-hand as a complete production line.

Learn about Sailwin PET Blow Molding Machines →

How many cavities can a PET preform injection molding machine have? +

Depending on platen dimensions and clamping tonnage, Sailwin SW-P models accommodate from 4 to 64 cavities. Our SW-P170 typically carries 8–16 cavities; SW-P228 runs 16–24 cavities; SW-P300 carries 24–32 cavities; and SW-P550-S5500 runs up to 64-cavity hot runner molds.

Can a PET preform machine process PP material as well? +

Yes. While optimized for PET, our machines easily mold Polypropylene (PP) and HDPE preforms by adjusting the barrel temperature settings. Bimetallic screws are available for operations running multi-resin products.

What is the typical cycle time of a PET preform injection molding machine? +

For standard 14g–20g water bottle preforms with mold water chilling, cycle times are 10 to 14 seconds (64-cavity production reaches over 500,000 preforms per day at 11s cycles). Heavier preforms (e.g. 5-gallon or wide-mouth jars) run between 20 and 32 seconds.

How to choose a reliable PET preform machine manufacturer? +

Inspect the manufacturer's dedicated PET screw design, clamping platen thickness, tier-1 servo drive sourcing, and ability to test the machine with your actual mold prior to container loading. Sailwin has over 15 years exporting to 60+ countries with full turnkey commissioning.

Can I order preform molds together with the injection machine? +

Yes. Sailwin builds high-precision needle valve gate hot runner preform molds (using S136 stainless steel and copper beryllium neck inserts) tailored to your exact bottle drawing. We run full mold-machine trials before shipping.

DOWNSTREAM MATCHING

Complete Your Bottle Line: Explore Matched PET Blow Molding Machines

PET blow molding machine Sailwin factory hero

CATEGORY HUB

PET Blow Molding Machine Hub

Full spectrum of linear stretch blow molders for 0.1L–20L bottles. Semi-auto to 12,000 BPH fully automatic.

View PET Blow Molders →

HIGH SPEED LINE

Automatic PET Blow Molding Machine

Servo-driven 2 to 8 cavity rotary and linear blow molding equipment. Pairs directly with SW-P preforms.

View Automatic Series →

LARGE JUG SPECIALIST

5-Gallon PET Blow Molding Machine

Engineered for 5-gallon water dispenser bottles. Pairs with SW-P450 / SW-P550 5-gallon preform molders.

View 5-Gallon Series →

READY TO PRODUCE PREMIUM PREFORMS?

Start Your PET Preform & Bottle Project with Sailwin

Tell us your preform weight, neck specification and daily production volume. Our senior extrusion & injection engineers will calculate clamping requirements and deliver a comprehensive factory-direct quote.

💬 WhatsApp: +86 151 6761 3775

⚡ Average quotation response time: within 2 hours · Direct factory sales · Full CE documentation support