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Parting-line Flash: Guide for Avoiding

By |2020-06-29T02:25:22+00:00June 29th, 2020|For all, plastic industry|

Phenomenon A phenomenon in which the resin squeezes out and solidifies on the parting line of the mold. Cause There is a gap in the mold Foreign matter is attached between the mold plates Rising internal pressure(insufficient vent) High injection pressure Insufficient mold clamping force Large material supply High resin temperature Long injection pressure

Sink Marks: Tips For Solving The Problem

By |2020-06-24T00:29:16+00:00June 24th, 2020|For all, plastic industry|

Phenomenon The phenomenon that the surface of a molded product is dented due to shrinkage. It is often found in thick molded products. Cause Small gates, sprues and runners Poor gate position Insufficient cooling time Overly high or low mold temperature Low injection/holding pressure Short injection/holding time 3. Measures (1) Measures related to

The Use of Cable Tie : Most Comprehensive Collection (2020)

By |2020-07-17T09:49:19+00:00June 22nd, 2020|For all, plastic industry|

Speaking of cable tie, you may think it far away from our daily life, because it’s generally used in mechanical and eletrical products and industry. But if you get to know enough about it, you may fall in love with it. I will tell you why. Now, let’s explore the wonderful and magical world

How to deal with the warpage in injection molding?

By |2020-06-19T01:16:04+00:00June 19th, 2020|For all, plastic industry|

Phenomenon A phenomenon in which a molded product warps in a convex or a concave shape immediately after molding. Cause Unbalanced protrusion of molded products Bad mold release Uneven cooling Big gate Stick out quickly High injection pressure, high injection speed Short injection/holding time 3. Measures Prolong mold cooling time and balance mold

What are the causes of silver streaks in injection molding?

By |2020-07-22T01:18:27+00:00June 17th, 2020|For all, plastic industry|

Phenomenon A phenomenon in which silver streaks occur on the surface of a molded product. Cause Poor air release (gas release) Overly small gates, runners, and sprues Insufficient degassing of the mold Small slug well A lot of water adsorbed on the resin Insufficient injection pressure Overly low mold temperature High cylinder temperature Fast

How to avoid short shot in plastic products?

By |2020-07-08T02:38:04+00:00June 15th, 2020|For all, plastic industry|

Phenomenon An incomplete phenomenon in which the resin is not completely filled. And this is called short shot. Cause Overly runner/gate diameter Long runner Large flow resistance in cavity Poor degassing of sprue and runner Insufficient air escape in the mold Lack of supply Insufficient injection pressure Slow filling speed Low resin temperature Low

How would the weld line occur ?

By |2020-07-07T08:54:50+00:00June 12th, 2020|For all, plastic industry|

This article has showed the  phenomenon, causes and solutions of the weld line occuring in the prossess of injection molding. Phenomenon Materials flow in two or more directions. When they join again, the resin temperature drops and they don’t fuse, which results in a weld line. Cause Large flow resistance in sprue, runner

8 points for attention when injection molding PET preform

By |2020-07-22T01:16:36+00:00June 10th, 2020|For all, plastic industry|

Plastic processing PET macromolecules contain lipid groups and have a certain degree of hydrophilicity. Pellets are sensitive to water at high temperatures. When the moisture content exceeds the limit, the molecular weight of PET decreases and the products are colored and brittle during processing. Therefore, before processing, the materials must be dried with the temperature of 150 ℃ in more than 4

Ⅱ.What are the important parameters of the injection molding process?

By |2020-07-08T02:33:56+00:00June 8th, 2020|For all, plastic industry|

Injection process parameter settings 3. Injection pressure and speed The setting of injection pressure should follow the principle of being low rather than high. As long as it can provide enough power to achieve the required injection speed and allow the melt to fill the cavity smoothly, that would be ok. Excessively high pressure

Ⅰ.What are the important parameters of the injection molding process?

By |2020-08-11T06:49:47+00:00June 5th, 2020|For all, plastic industry|

Because the injection molding equipment and the  requirements for product quality continuously develop. Higher requirements for the injection molding process are put forward.  Correct selection of injection equipment, reasonable setting of molding process and optimization process conditions are the keys to improving product quality. Selection of injection molding machine specification When choosing the

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