Polishing Treatment for Plastic Molds
February 22, 2024
Polishing Treatment for Plastic Molds With the widespread application of plastic products, such as daily-use items and beverage packaging containers, there is often a requirement
The Reasons of the Demoulding Difficulty of Plastic Injection Mold
After the plastic part is injection molded, the plastic part is ejected from the mold cavity. Whether it is a single or multi-element ejection mechanism, the demolding work is generally completed at one time. But sometimes due to the special shape of the plastic part or the need of production automation, it can’t be finished at one time. There’s a situation that after a demolding work is completed, the plastic part is still difficult to be taken out from the cavity or cannot fall off automatically. At this time, another demoulding should be done to make the plastic part fall off. Demoulding difficulty is mainly because the gate or the plastic part is compressed in the mold. The reasons for that are mainly as follows:
Reasons of the demoulding difficulty
1. Equipment:
Insufficient ejector power
2. Molds
(1) Unreasonable demoulding structure or improper position.
(2) The draft angle is insufficient.
(3) Mold temperature is too high or poor ventilation.
(4) The sprue wall or cavity surface is rough.
(5) The nozzle does not conform to the mold inlet or the nozzle diameter is larger than the inlet diameter.
3. Process
(1) The barrel temperature is too high or the injection volume is too much.
(2) The injection pressure is too high or the holding and cooling time is too long.
4. Raw materials: insufficient lubricants
The traditional demoulding methods of plastic molded parts are roughly divided into four types: ejection, pushing, pulling, and spinning.
Now there is a newest demoulding technology that can easily solve the problem of plastic demoulding. In the plastic mold industry, there are many unsolvable problems, especially when a variety of resin compounds are used for highly complex designs and high-gloss finish processing.
Nano release coating can form a coating on the surface of the plastic mold, or even the insert of the plastic mold. It can significantly reduce the coefficient of friction of these surfaces. Besides, a highly glossy processing surface can be made without using traditional mold release agents. Even though the design and plastic compound make the machine/tool maintenance downtime longer, resulting in low production yield.
If the cost is limited, nano-release coating can also extend uninterrupted production time and significantly reduce machine/tool maintenance downtime. It maximizes the efficiency and role of plastic mold production and reduces waste. Nano release coating not only improves the smoothness and accuracy of the plastic mold surface, but also greatly improves the productivity of the plastic mold manufacturing industry!
Related Post
Injection Molding Techniques for TPE and TPR
January 23, 2024
Injection Molding Techniques for TPE and TPR Injection Molding Techniques for TPE and TPR 1. Dry the TPE and TPR material before injection molding It
Winter Maintenance Measures for Injection Molding Machines
January 10, 2024
Winter Maintenance Measures for Injection Molding Machines As winter approaches and temperatures gradually drop, a cold chill envelops the earth. While ensuring personal warmth, it
Assessment Regulations for Mold Trial Exceeding 3 Times
December 21, 2023
Assessment Regulations for Mold Trial Exceeding 3 Times Assessment Regulations for Mold Trial 1. Purpose The purpose of this regulation is to standardize the work of