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PET preform moulds are specialized, high-precision tools used in injection molding to produce test-tube-shaped polyethylene terephthalate (PET) intermediates, which are later stretched and blown into final bottles. These moulds are engineered with durable hardened tool steels, featuring high-cavitation (up to 144+ cavities) for mass production, hot runner systems for efficiency, and precise cooling channels to minimize cycle times. Common types include hot runner molds for reduced waste, valve-gate molds for high-quality neck finishes, and stack molds for maximum output.
Key Features of Tube Preform Moulds
- High Cavitation: Molds commonly feature 24 to 96 cavities, with some reaching over 144, enabling mass production of thousands of units.
- Material: Constructed from high-quality, hardened tool steel (like S136) to withstand high pressure and ensure a long lifespan of millions of cycles.
- Hot Runner System: Designed with a heated manifold to keep plastic molten to the gate, reducing waste and accelerating cycle times.
- Precision Cooling: Optimized water channels around the cavity and core pin ensure fast cooling, which is essential for consistent preform weight and structural integrity.
- Interchangeable Components: Many systems allow for the replacement of individual neck inserts and core pins.
Types of Preform Moulds
- Hot Runner Preform Molds: These are the most common in modern, high-volume manufacturing, using a heated system to eliminate runner waste and provide better quality control.
- Valve Gate Preform Molds: A specialized subset of hot runner systems that use a pin to close the gate, reducing gate marks and ensuring superior neck finish for high-quality, PET preforms.
- Stack Molds: Used for high-volume output, these have multiple parting surfaces stacked together, doubling production on a single machine.
- Cold Runner Molds: More conventional and generally cheaper, but produce more material waste.
Production Applications and Specifications
Preform moulds are critical for producing packaging for various industries:
- Beverages: 28mm PCO 1810/1881 for carbonated drinks and water.
- Hot-Fill: Specialized 38mm neck molds for juices and dairy.
- Wide-Mouth: For jars, often 55mm to 100mm+.
- Medical/Cosmetics: Smaller, specialized tubes or bottles.
Key specifications during production include the neck finish (e.g., PCO 1810, 30/25, 38mm), preform weight (from 10g to 700g+ for 5-gallon bottles), and the color of the preform.
For high-volume production, a hot runner valve gate mould (e.g., HITEK PACK 32-cavity) is standard for achieving low acetaldehyde (AA) levels and efficient cooling.
Would you like more information on the specific steel types used, or details about the hot runner system design?
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PET Preform Tube Molds - Precision and Efficiency
Alibaba.com
https://www.alibaba.com › Fabrication Services › Moulds
Alibaba.com
https://www.alibaba.com › Fabrication Services › Moulds
Find high-quality PET preform tube molds for various applications. Precision and durability for injection molding. Perfect for beverage bottles and medical ...
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Web results
PET Preform Mold
Guangzhou Huayan Precision Machinery Co., Ltd.
https://www.huayanpet.com › PET-Preform-Mold_c2
Guangzhou Huayan Precision Machinery Co., Ltd.
https://www.huayanpet.com › PET-Preform-Mold_c2
PET preform molds are crucial elements in the production of PET preforms, which are the foundational components for producing top-tier plastic bottles. Hot Tags ...Read more
What's the pet preform injection mold?
cavitymold.com
https://www.cavitymold.com › whats-the-pet-preform-i...
cavitymold.com
https://www.cavitymold.com › whats-the-pet-preform-i...
Sep 1, 2025 — A PET preform injection mold is a specialized tool used to make PET (Polyethylene Terephthalate) preforms. These preforms look like test tubes ...Read more
People also ask
What is a preform mould?
A preform mold is a specialized type of injection mold designed to produce "preforms." These preforms are an intermediate product, typically tube-shaped with a threaded neck finish, which will later be stretch blow molded into the final bottle or container shape.Sep 1, 2025
What's the pet preform injection mold?
cavitymold.com
https://www.cavitymold.com › whats-the-pet-preform-i...
cavitymold.com
https://www.cavitymold.com › whats-the-pet-preform-i...
How are tubes injection molded?
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3:44
Once the clamp pressure is at an optimum level the plastic is injected by a screw at high speed. AndMoreOnce the clamp pressure is at an optimum level the plastic is injected by a screw at high speed. And pressure into the cavity. A gate inside the tool helps to control the flow of the plastic.
Injection Moulding: How does it work? | Essentra Components - YouTube
YouTube
https://www.youtube.com · Essentra Components
YouTube
https://www.youtube.com · Essentra Components
Web results
Preform mould from China Manufacturers
GoldSupplier.com
https://yw-machinery.goldsupplier.com › 90439-Preform...
GoldSupplier.com
https://yw-machinery.goldsupplier.com › 90439-Preform...
2015 24 Cavities Hot Runner Plastic Pet Tube Preform Mould. US$ 5,000 - 200,000 /Set. 1 Set(MOQ).Read more
$3,000 to $5,000
preform mould: High Precision & Customizable Options
Accio
https://www.accio.com › plp › preform-mould
Accio
https://www.accio.com › plp › preform-mould
Looking for preform mould? Discover high-precision, customizable solutions with verified suppliers. Compare prices, MOQs, and features.
Precious Plastic Pet Bottle Injection Mold Preform Molds
Made-in-China.com
https://chinaruijie.en.made-in-china.com › product › Ch...
Made-in-China.com
https://chinaruijie.en.made-in-china.com › product › Ch...
RJ Mould is professional in making all kinds of PET preform moulds, we are very capable to provide Preform Design, Mold Design and Mold Manufacturing for our ...Read more
$800.00In stockReview by MIC_BUYERFree delivery
Test Tube Molds | International Standard Tubes - Pass Card
passcard.com.tw
https://www.passcard.com.tw › Products › Medical Molds
passcard.com.tw
https://www.passcard.com.tw › Products › Medical Molds
Pass Card's high-quality test tube molds are designed for various tube types, including conical, flat bottom, or cylindrical shapes.
China 72cavity PET bottle preform mold tube ...
AnsixTech Co., Ltd.
https://www.ansixtech.com › ... › PET Preform Mold
AnsixTech Co., Ltd.
https://www.ansixtech.com › ... › PET Preform Mold
72-cavity PET preform mold has high production efficiency and can reduce labor and equipment usage costs.Read more
