English
русский
The air trapping position in cavity and exhaust method
The air trapping in cavity is usually in the following places:
1. Thin-wall structure cavity, the end of melt flow;
2. The junction of two or more melts;
3. The last area where the melt in the cavity reaches;
4. The bottom of the blind hole of the mold cavity is mostly the end of a solid column in the part;
5. Reinforcing ribs of molded parts and the bottom of screw pillars;
6. Dead corners of complex mold cavities.
.png)
Exhaust method in injection mold include as following:
1. Parting surface (including venting slot);
2. The fitting surface of insert;
3. The fitting surface of the push rod or pipe with inner mold insert;
4. Exhaust from side core pulling mechanism;
5. Add a vent needle or insert to vent the air in the trapped area;
6. Breathable steel exhaust;
7. Air valve exhaust;
8. The mold is evacuated and exhausted.
Venting insert design of molded parts
Mar 13, 2022In the thin-walled cavity, the end of the melt flow, the bottom of the blind hole of the mold cavity, the end of the solid column of the plastic part, the bottom of the plastic part rib and screw...view
Key points of plastic injection mold runner system
Jan 12, 2022The sub-runner is a transitional channel between the main runner and the gate, as the sub-runner is the longgest part of gating system, so it is very important to enhance the parts quality and improve...view
Limitations of gas-assisted injection molding technology
Apr 25, 2022Gas-assisted injection molding technology has obvious advantages in thick wall thickness and pipe parts, but this technology still has many limitations, which are mainly reflected in the following...view
Gate position determination of plastic injection mold runner design system
Jan 17, 2022In the selection of gate location, the following issues should be paid attention to: 1. The gate position should be set at the maximum wall thickness of the plastic part, so that the plastic melt...view_20250317090912A017.jpg)
Several common process of water-assisted injection molding introduction
May 24, 2022According to the design of the injection molding machine and the casting system, the corresponding melt-returning process of water-assisted injection molding can be roughly divided into two types: the...view
Direct gate of plastic injection mold runner system design
Jan 19, 2022In order to get the best injection quality, the gate type must be selected carefully, the coommon gate tyeps are: direct gate, side gate, pin-point gate, sub gate,valve gate of hot runner etc. Among...view