What are the preparations for injection molding services?
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What are the preparations for injection molding services?

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What are the preparations for injection molding services?

Injection molding service is a service that is a tool for producing plastic products, and a service that gives plastic products their complete structure and precise dimensions. So, what are the preparations before the injection molding service? Here are some of them.


Dosing

Drying of raw materials

Cleaning of the molds


Dosing

In general, the injection molding service has already adjusted the color of the products in the pre-production stage, and the ratio of the color powder and masterbatch has been formulated, and some color limit samples will be made, so the mass production stage only needs to strictly follow the material requirement table and the dosing according to the operation instruction. The key point of the dosing operation is that before dosing, the mixer should be cleaned with an air gun and a soft cloth to clean the inner wall of the hopper, and those mixed with color powder should be cleaned with mold washing water or kerosene. The best bag to fill the material is to keep the original material bag, no original material bag times with the material bag should be clean, to ensure no dust and no other raw materials.


Drying of raw materials

If the moisture in the raw materials exceeds a certain amount, the surface of the products produced will show material flowers (silver pattern), bubbles, shrinkage holes, and other defects, which will cause degradation and affect the appearance and internal quality of the products. Therefore, injection molding services before the need for plastic raw materials to dry treatment. Different kinds of plastic materials, their moisture absorption is different, therefore, can be divided into two categories: easy to absorb moisture and not easy to absorb moisture. Three factors affect the drying effect, namely, drying temperature, drying time, and material wall thickness. After drying, the raw materials will leave the dryer again after the moisture absorption, a long time without use, before using the same conditions to re-dry.


Cleaning of molds

Before injection molding service, the mold surface, cavity, the gap around the insert, the nozzle, runners, and other parts of the anti-rust oil should be cleaned to prevent oil from sticking to the products or blocking the exhaust of the mold due to oil, which affects the stability of molding. Mirror products, electroforming shell after processing the appearance of the more stringent requirements of the mold is strictly prohibited with drug cotton, rags old gloves wipe, to prevent the operation process caused by the mold surface damage, resulting in the surface of the product scratches. Generally, it is rinsed with mold washing water, while blowing with an air gun. During the operation of the injection molding service, we should prevent the air gun or other objects from touching the surface of the mold. When disassembling the mold for cleaning, pay special attention to the disassembled inserts, mold shells should be put away in a special plastic box, and if necessary, use pearl cotton sheet, soft cloth sheet to wrap and store. Dismantle the mold for cleaning, non-professional personnel should not operate. The best way to clean the mold is to do it before the machine, firstly, it is easy to clean and ensure quality, and secondly, it can save the time to turn the mold.


Team Rapid MFG Co., Ltd has been engaged in injection molding service for many years.