In the process of plastic production, various reasons lead to different defects of various products. The following are common product defects and solutions:
There are some non design reasons, such as mold temperature, material temperature, high temperature, insufficient holding time and residual stress, etc. when the deformed products are out of the mold. The product wall thickness and uneven shrinkage, improper gate position and ejector position, and mold sticking must be considered in the design.
The vacuum state caused by too much broken return material or filler, too small and too little ejector bar, too fast jacking speed, too low material temperature, die sticking, too small gap, etc. the insufficient preheating of inserts with inserts will also cause cracks. A few products have to be annealed for stress relief.
Wear demoulding angle is too small, demoulding is difficult, verticality is not good, there are machining residues at the wear, such as burr at the front corner of the cavity after the grinder, too rough, etc., which are easy to solve.
Bubble temperature is too low, too high, wall thickness is too wide or too thick, moisture is too high, containing solvent or volatile, pressure is too high, exhaust is not smooth, injection cycle is too long, resulting in plastic decomposition in the barrel.
The die locking pressure of flash can not match the injection pressure, the die plate is deformed and not closed tightly, the temperature is too high, the gap of core cavity is too large, and the position is deviated.
The Striped plastic is overheated and decomposed, the pressure is too low, the runner and gate are too small and the position is improper, or the gate design is unreasonable, the injection occurs, and the plastic is not fully dry. If the temperature is too low, the ripple will be formed during mold filling.
It is difficult to avoid the weld mark when the multi cores are broken together. The reasonable control of temperature and injection speed, and the design of gate and exhaust overflow position can improve the appearance of the product
About JasonMould Industrial Company Limited
Jasonmould is a China mold maker of plastic molds- injection mold, die casting moulds, plastic blow molding, rotational molding, medical plastic injection molding, two shot plastic injection molding, insert molding, overmolding, metal injection molding, micro injection molding, powder injection molding, ceramic injection molding, liquid injection molding, husky injection molding, household mold, casting mold, die mold tool, custom molds, china moulds, rapid prototyping tooling, plastic prototyping tooling, punch press tooling, die and tooling for mobile/ cell phone parts, automotive parts, vacuum cleaners, rechargeable tools, telephones, copiers, computers, multimedia speakers, and many other electronic products and household appliances. And also a plastic product manufacturer, mold manufacturer China– plastic parts, plastic water tank, plastic balls, plastic containers, plastic buckle, plastic anchor, plastic hanger, plastic spoon, plastic pipe fitting, plastic tumble, plastic tableware, plastic cups, plastic bottles, plastic tray, plastic cosmetic container, plastic case, plastic food container, plastic chairs, plastic caps, plastic cap closure, plastic tubes, plastic water pipes, plastic knobs, plastic tubing, plastic utility boxes, plastic racks and so on.
Contact:
Person: James Yuan
Company: JasonMould Industrial Company Limited
Add: LongGang Village,LongXi Town,BoLuo County,HuiZhou City,GuangDong Province, China
Tel: 86-752-6682869
Email: [email protected]
Site: https://www.jasonmolding.com/custom-injection-molding/
