- +86-133 8657 7775 [Mr. Shen]
- No.9 Xiangguang Road, Beicheng Street, Huangyan District, Taizhou City, Zhejiang
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72 Cavity Hot Runner Plastic PET Preform Mould
Usually, the multi-cavity PET preform mold does use a hot runner system instead of a cold runner system, so the design of the hot runner system plays an important role in mold quality assurance. On the basis of drawing on foreign advanced technology and combining the needs of domestic customers, we adopted a valve gate design, each cavity has its own heating zone, and the temperature is measured by an independent thermocouple. (Advantages: easy to avoid problems such as white or wire drawing. Bottom). Here, the mold is produced automatically to reduce labor.
The main parts of the mold (mold core, mold cavity, threaded neck) are manufactured by injection molding process, and made of special mold steel (German steel 2316) after pre-heat treatment in the original German factory. In this way, a long-life, high-quality mold can be used 2 million times without any maintenance, and at the same time, the wall thickness is between the maximum. Parts and minutes. The part does not exceed 0.10mm. It adopts 50# steel mold base and 718# steel slider. The mold uses imported components such as high-quality lubricating copper plates, German heater HOTSET, and German standard PID temperature controller. In addition, the turning center process ensures that each part can be well matched; the appropriate distribution of cooling water channels improves productivity, and the molding cycle is only 15 seconds (requires appropriate chillers, bottle design and injection molding machines).
The template is made of stainless steel or P20 pre-hardened, and the P20 template is nickel-plated, with a Rockwell hardness of 38-40 degrees. -The core, cavity and screw are made of Sweden ASSAB S136 or Germany 2316, with Rockwell hardness of 48~52 degrees. -Graphite copper plates are inlaid between the slider and the pushing plate, between the guide post and the guide sleeve to achieve a better lubrication effect. -Each cavity heating ring adopts Italian ROTFEL or German HOTSET. -The thimble adopts Japanese SKD-61.
1. The weight tolerance of preform products is ±0.2g (increasing with product weight). 2. The eccentricity range of preform products is ±0.1mm (increasing with the length of the product). 3. Efficient cooling water circuit, shorter injection time. 4. Guarantee 3 million injection mould times. The main parts are matched with a double taper self-locking design, and the life of the mold in normal use can reach 3 million mold times. The optimized cooling system reduces the cycle molding time of the mold.
-Swedish ASSAB S136 or German 2316 are used for core, cavity and screw, with Rockwell hardness of 48~52 degrees. -Mold structure design superior to other molds. -Each cavity part adopts independent self-locking structure. -The parts in each cavity are interchangeable, the structure is reasonable, and the maintenance is convenient. -Ensure accurate product weight and low eccentricity. -Imitate the HUSKY gas seal mold hot runner system to ensure high product transparency.
In order to ensure the quality of CH preform molds, the company is equipped with a projector to check the size of the preform, a hardness tester for mold parts, and a stress tester, eccentricity tester, high-precision electronic scale for the preform after injection molding, etc. Professional testing equipment. The use of the above measuring equipment can ensure that our PCO1810, PCO1881, 30/25 and other standard preform calibers can reach the ISB standard.
| PET PREFORM MOULD SPECIFICATION | |
|---|---|
| Mould name | 72 cavity preform mould for PCO 1810 Neck 25g Preform |
| Mould cavity | 72 cavity |
| Neck finish | PCO 1810 CSD Neck finish |
| Preform weight | 25g |
| Insert materials | 2316 stain steel from German |
| Mould body | P20 steel material |
| Cycle time | 32 sec with general PET screw type of injection molding machine |
| Cycle time with two stage injection system and Post cooling system | 17 sec with 3 stage post cooling system |
| Hot runner design | Balanced Hot runner with valve gate system |
| Suitable injection molding machines | Husky, Netstal PET line, PET Master, General PET injection molding machine |
Material of preform mold
(1) The main parts of the mould are made of imported DIN 2316 materials.
(2) The mold base material is made of P20 material or No. 50 steel plating treatment, which improves the corrosion resistance of the mold and prolongs the service life of the mold.
(3) The heat treatment of the parts is processed by an imported vacuum furnace, and the hardness of the parts is guaranteed to be HRC45°-52°.
Advanced processing equipment
The company has imported processing equipment from the United States and Japan, such as machining centers, CNC lathes, EDM, etc., to ensure the machining accuracy of the parts and make the parts have good interchangeability. The product eccentricity value is ≤0.10mm (the length of the preform is within 100), The weight error is less than 0.3g. The cycle time of the 30/25 preform with 24 cavities and 16g is 18 seconds per mold, and the life span can reach 3 million molds.
Advanced detection methods
In order to ensure the quality of Chuanghong's preform mold, the company is equipped with a projector to check the size of the preform, a hardness tester for mold parts, and professional inspections for the stress detector, eccentricity detector, and high-precision electronic scale after the injection molding of the preform. equipment. The use of the above measuring equipment can ensure that our PCO1810, PCO1881, 30/25 and other standard preform calibers can reach the ISB standard.
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