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Analysis of the Causes of Poor Surface Gloss of Injection Molding Products Jun 28, 2019
The surface gloss of the injection molding is poor, and there are two main reasons for the overall transparency. First, the mold surface is not polished well, and the second is that the melt is cooled prematurely. The specific solution is as follows: (1) Increase the material temperature, injection pressure and speed, especially mold temperature. The mold temperature has a significant effect on th...
- mold Filling
- plastic mold Filling
- injection molding machine
The short shot checkpoints Jun 28, 2019
The short shot checkpoints As mentioned that, when the melt is cooled down without filling the mold cavity, or the melt does not fill completely after running into the cavity, it is called the short shot injection molding. We analyse the reasons of short shot. So today let’s discuss how to improve the insufficient injection. Here lists short shot checkpoints: 1) Improper control of process conditi...
- mould temperature
- mold cavity
- short shot injection molding
There are undercuts around products'4 corner,should we make lifter or slider? Jul 08, 2019
As we know, During mold designing, If the product has inner undercut, we usually make lifter, If has outside undercut, we will make slider, But If it has undercut around the 4 corner, and couldn't be forced demoulding, what should we do? As below picture, should we make lifter or slider? 1. Design Analysis If so, first we will think about to make lifter, but after analyze, If make lifter the...
- Mold designing
- demould
- injection mould
The Classification of Plastic Raw Material Jul 19, 2019
The phrase plastic is familiar to us, but most people don't know much about plastic. Plastic materials can be divided into three categories: engineering plastics, general plastics, thermoplastic elastomer plastic materials. Engineering plastics: PC, PC/ABS, PBT, POM, PMMA, PA6, PA66, PPA, PET, PEI, PPS, PCTG, PETG, PPO, COC, LCP, PPE, etc. General plastics: ABS, PVC, EVA, PP, HIPS, HDPE, LDPE, LLD...
Annealing of plastic products Jul 12, 2019
The annealing treatment of plastic products refers to the plasticization unevenness of the plastic in the cylinder or the uneven cooling rate of the product in the cavity, which causes the internal stress of the product to cause deformation, cracking and aging of the product in the future. The annealing treatment is carried out indoors, using a hot liquid medium such as hot water, hot mineral oil,...
- mold Filling
- injection molding machine
- plastic mold Filling
What is snake mark and how to solve it? Jul 12, 2019
Snake mark is an indication when injection molding. So what will cause the snake mark? When injecting a plastic part, the Gate is smaller, while the space of the mold cavity is relatively larger. At this time, the temperature of resin is cooling down before it fullly injects into the whole mould cavity frame. Therefore, it will have a flowing marks remaining on the part surface like a snake crawli...
- injection molding
- snake mark
- mold cavity
What is 'Catch hook and thin-wall' of plastic mold products? Sep 18, 2019
What is 'Catch hook and thin-wall' of plastic mold products? 1. The Catch hook The catch surface and the amount of catch hook are the important basis for the test data during assembe. Once made any tiny mistake about these numbers, It would become a huge mistake of the product. Therefore, during mould design, We needs to pay special attentin to the catch hook assembly and testing. 2. The thin-wall...
- Mould design
- Plastic mould
- plastic injection mold
Actual Case Analysis of Poor Shrinkage (1) Jul 26, 2019
Today we are going to discuss one case for the sink mark, we will show what we would do when we face the sink mark problem. 1. Basic information: PE, Holder (car parts) shrinks poorly and snakes are bad. 2. Description: The plan to increase the injection pressure has not been solved. In order to make the resin pressure fully function, the gate thickness is increased and the sink mark is improved. ...
- injection mould design
- injection molding parts
- plastic auto molding

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