Non Mark Injection Molding

Discussion for transparent plastic raw materials Jan 16, 2020
The types of transparent plastic raw materials usually are acrylic or PMMA, PC, PET, transparent nylon, etc. Among them, we have been exposed to three kinds of plastics: PMMA, PC and AS. Transparent materials usually used in six major application areas: (1) Daily commotidities: Transparent film: PE, PP, PS, PVC, PET, etc. for packaging, agricultural PE, PVC, PET, etc. Transparent sheet: PP, PVC, P...
- transparent part mold
- PMMA molding
- pet blister mold
Common injection molding product defects and solutions-5 Jan 16, 2020
Jetting the reason: 1.Injection speed is too slow or too fast. 2.The injection pressure is too low. 3.The holding time is too long. 4.The mold cooling has been uneven. 5.The temperature near the mold gate is low. 6.The mold surface temperature is too low. 7.The mold gate size is too small. 8.Gate position design is not reasonable. 9.The gate flow is too long. 10.The melt temperature is too low. So...
- mold Filling
- injection molding machine
- plastic mold Filling
Welding Technology of Plastic Mold Jan 16, 2020
The most commonly used welding methods for plastic mold engineering parts are: high temperature tool welding, rotary welding, vibration welding, ultrasonic welding, and other methods: high frequency welding, induction welding, hot gas welding, laser welding, etc. In order to obtain high-quality and reproducible welding quality, a suitable welding method needs to be selected to optimize the welding...
What's welding line? Jan 10, 2020
Welding Line is refers to the slim line disappear in which the plastic raw material melting and collecting. Why it happens? 1. Insufficient liquidity of melting raw materials 2. Have air or volatile component 3. Release agent or colorant 4. Defect of mold design How to improve? 1. Change raw material to better liquidlity 2. Check and improve the air venting, decrease the injection speed 3. Use les...
- welding line
- welding mark
- mold defect
What are the procedures for texture? Jan 16, 2020
Before, We have talked about the mould texture. There are 7 procedures for mould texture as below: 1.Cleaning the cavity surface 2.Covering the cavity surface which no need to be texture,or painting antiseptic paint on it 3.Drying the antiseptic paint 4.Using degrease cotton to clear the cavity surface which need to be texture, make sure that there's no any impurities and filth to effect texture. ...
- Etching Texture
- plastic injection molding
- mould texture
Defects analysis of injection molded products - Bubbles Jan 17, 2020
Bubbles are the phenomenon of small volume or series of pores formed inside the product. A large amount of gas is mixed into the melt and is formed by cooling the melt. 1. Venting system is bad or blocked 2. The cooling system is not setting properly, which makes the material cooling uneven or insufficient. 3. The injection speed is too fast 4. The material temperature is too high, which will caus...
- injection molded products
- mould cooling
- plastic filling analysis
Common injection molding product defects and solutions-6 Jan 17, 2020
Burr the reason: 1.Insufficient clamping force. 2.The injection pressure is too high. 3.Injection speed is too fast. 4.The holding pressure switch is too late. 5.Insufficient mold support. 6.Defect of mold parting surface. 7.The melt temperature is too high. 8.Low viscosity. Solution: 1.Reduce filling speed or holding pressure. 2.Improve the clamping force. 3. Change the position or method of hold...
- mold Filling
- injection molding machine
- plastic mold Filling
Two-color mold design and injection tips Mar 20, 2020
1. The water circiuts of the cavities and cores is designed as full as possible and balanced. 2. After the cavity rotates 180 ° from the center, it must match the core. 3. Usually, injecting the hard rubber part first, and then the soft rubber part, because soft rubber is easy to deform. 4. The nozzle of the three-plate mold should preferably be designed to automatically demolding. Special attenti...
- 2 color mould
- two-color mold injection
- twice molding

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