Ningbo haijiang machinery manufacturing co.,Ltd
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram |
| Supply Ability | 100 Set/Sets per Month |
| Delivery Time | 20-30days |
| Packaging Details | Standard Export Package for Injection Machine |
| Voltage | Customed Avaiable |
| Used for | Plasic Products |
| Motor | servo & standard & variable pump |
| Keyword | energy saving |
| Warranty | 18 months |
| Plastic type | Thermoplastic |
| Brand Name | HAIJIA |
| Model Number | HJF 240 |
| Certification | CE ISO9001 |
| Place of Origin | CHINA |
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Product Specification
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram | Supply Ability | 100 Set/Sets per Month |
| Delivery Time | 20-30days | Packaging Details | Standard Export Package for Injection Machine |
| Voltage | Customed Avaiable | Used for | Plasic Products |
| Motor | servo & standard & variable pump | Keyword | energy saving |
| Warranty | 18 months | Plastic type | Thermoplastic |
| Brand Name | HAIJIA | Model Number | HJF 240 |
| Certification | CE ISO9001 | Place of Origin | CHINA |
| High Light | all electric injection molding machines ，plastic products making machine | ||
1. Treatment of plastics
Because PET macromolecule contains lipid group, it has certain hydrophilicity. Particles are sensitive to water at high temperature. When the moisture content exceeds the limit, the molecular weight of PET decreases and the products become colored and brittle.
Therefore, before processing, the material must be dried, its drying temperature is 150 C, more than 4 hours; generally 170 C, 3-4 hours. It can be used to check whether the material is completely dry. The proportion of recycled PET bottle blank should not exceed 25%, and the recycled PET bottle blank should be thoroughly dried.
2. Selection of Injection Molding Machine
Because of the short time of stabilization after melting point and the high melting point of PET, the injection system with more temperature control section and less self-friction heat generation during plasticization should be selected, and the actual weight of the product (water-containing orifice) should not be less than 2/3 of the injection volume of the machine.
3. Mould and gate design
PET bottle embryo is usually formed by hot runner mould. It is better to have a heat insulation plate between the mould and the injection machine template. The thickness of the heat insulation plate is about 12 mm, and the heat insulation plate must be able to withstand high pressure. Exhaust must be sufficient to avoid local overheating or fragmentation, but the exhaust outlet depth should not exceed 0.03mm, otherwise it is easy to produce flash.
4. Melt temperature
It can be measured by air irradiation method, ranging from 270 to 295 degrees C, and the enhanced grade GF-PET can be set to 290 to 315 degrees C.
5. Injection speed
Generally, the injection speed should be fast to prevent premature coagulation during injection. But too fast and high shear rate make the material fragile. The projectile is usually completed in 4 seconds.
Company Details
Business Type:
Manufacturer
Year Established:
1992
Total Annual:
10000000-12000000
Employee Number:
100~120
Ecer Certification：
Verified Supplier
NINGBO HAIJIANG MACHINERY MANUFACTURING CO.,LTD., situated in Ningbo Yinzhou Investment & Innovation Center, coversa land of more than 50,000M2.It was established in 1992 and now employs a staff of more than 500 people. with CE and ISO9001 Haijiang Company is a hihg-tech enterprise specialize... NINGBO HAIJIANG MACHINERY MANUFACTURING CO.,LTD., situated in Ningbo Yinzhou Investment & Innovation Center, coversa land of more than 50,000M2.It was established in 1992 and now employs a staff of more than 500 people. with CE and ISO9001 Haijiang Company is a hihg-tech enterprise specialize...
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