Thermosetting Materials Molding

Analysis of the Causes of the Shock Pattern of Injection Molding Products Sep 23, 2019
Rigid plastic parts such as PS form a dense corrugation on the surface near the gate, centered on the gate, sometimes called a shock pattern. The reason is that when the melt viscosity is too large and the mold is filled in a stagnant form, the front end material quickly condenses and shrinks as soon as it contacts the surface of the cavity, and the subsequent melt expands the contracted cold mate...
- mold Filling
- injection molding machine
- plastic mold Filling
Actual Case Analysis of Poor Shrinkage (4) Sep 23, 2019
1. Basic information: PMMA Case, shrinkage 2. Description: Using a injection machine with a clamping force of 70 tons (screw diameter of 32 mm, maximum injection amount of 115 g: GP-PS), whether a molded part with a weight of 179.6 g and a thickness of 17 mm can be molded is tested. do. The main problems are as follows: (1) The amount of injection is not enough. In order to solve this problem, we ...
- PMMA case mould
- PMMA injection molding
- plastic molded part
Analysis of the causes of swelling and bubbling of injection molded products Oct 12, 2019
Some plastic parts quickly swell or swell on the back of the metal insert or in a particularly thick part after the mold is demolded. This is because the plastic that is not completely cooled and hardened is caused by the expansion of the gas under the action of the internal pressure. solution: 1. Effective cooling. Reduce the mold temperature, extend the mold opening time, and reduce the drying a...
- injection molding machine
- mold Filling
Common injection molding product defects and solutions-1 Oct 25, 2019
Ejector marks the reason: 1. The thimble is too fast. 2. Cooling time is too long or too short. 3. The pressure holding switch position is too late. 4. The pressure is too high. 5. The pressure keeping time is too long. 6. The draft is not enough. 7. The thimble position design is unreasonable or too little. 8. The direction of demoulding is rough and the degree of polishing is not enough. Solutio...
- mold Filling
- injection molding machine
- plastic mold Filling
The common problems in injection molding of PC injection molds Nov 01, 2019
Everyone in the mold industry knows that pc injection molds will encounter some quality problems in one or the other during injection molding. Why do the same set of molds have different effects on products with different materials? This is due to the difference in the performance of the PC injection mold and the plastic material used for the injection molding. The pc material is relatively ...
- pc injection molds
- PC+ABS plastic molding
- Hot nozzle mould
Common injection molding product defects and solutions-2 Nov 08, 2019
Air traps the reason: 1. The injection speed is too fast. 2. Back pressure is too high. 3. Insufficient gas, gas encapsulation. 4. The flow channel size is too small. 5. The melt temperature is too high and it is necessary to reduce the shear. Solution: 1. Reduce the injection speed. 2. Clean the air trap in the trapped position. 3. Reduce the clamping force. 4. Reduce the pressure of holding pres...
- mold Filling
- plastic mold Filling
- injection molding machine
Design criteria for plastic injection mold runners Nov 08, 2019
Design criteria for plastic injection mold runners The runner is the first channel for plastic injection molding in the mold. Most of the plastic passes through here and then into the mold cavity and core. Therefore, the position of the runner should not affect the appearance of the product, and must meet the product assembly. When the mold uses pin-point gate, the hot runner plate should have a s...
- plastic injection molding
- hot runner mold
- plastic product mould
What is the difference between TPU extrusion and injection molding? Nov 20, 2019
Extrusion, also known as extrusion molding or extrusion, is also called extrusion in rubber processing. It means that the material passes through the action between the barrel and the screw of the extruder, and is plasticized while being pushed forward by the screw. A method of processing various cross-section articles or semi-finished articles by head. Injection molding is a method of prod...

1 ... 6 7 8 9 10 ... 16

A total of 16 pages

Categories

Blog

New Blog

Tags

Search