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Solution technology and technique of plane plastic injection molding parts: medium plastic online http://info.21cp.com/industry/News/201608/1172642.htm

2016-8-6 15:34:38

Plane injection parts of large size, shrinkage is also great. Because of the large injection molding parts of the molecular orientation is extremely serious, and mold cooling is not uniform, makes injection parts in each direction shrinkage inconsistent, resulting in thin plane of injection molded parts is very easy to deformation and distortion of the phenomenon. Sometimes the large plane injection part of the design of a certain side of the supporting bone, then the injection parts will be bound to a bone in the side of the bend.

In order to solve the problem of the deformation of the large planar injection molding parts, we have summarized some effective measures to improve the deformation:
One will change the mold into more points into the water (usually three board), more than 24 of the machine above the plane to reach more than 4 points. This can reduce the degree of molecular alignment, reduce the gap between the anisotropic shrinkage.
Two. To improve the mold temperature, ABS material is usually maintained at more than 60 degrees Celsius, in order to reduce the cooling rate of the injection molding parts, reduce the temperature difference caused by the cooling transition, while reducing the degree of molecular alignment.
. is the most important one, increase plastic injection and holding pressure, and greatly extended rubber injection and holding pressure time, injection molded parts size increases, reduce its shrinkage, deformation degree therefore will get obvious improvement. Therefore, the extension of the plastic injection or holding time (such as the extension of 15 to 10 seconds), has become an important means to solve the problem of deformation.
Four. If the above three measures have failed to achieve the desired effect, only to take a way out of the mold. Because the average person is not very good, so it takes a little skill.
First of all, to injection molding early out of the mold, then take it is still in the tens of degrees high temperature conditions (should is still hot to the touch, this is a key point), placed in a jig setting, the key is shaping fixture design needs the right. While also taking into account the rebound degree of injection molded parts, usually 12 hours after the rebound will be stopped and mold temperature more keyed bomb is bigger. The so-called hypercorrection must be positive, so the production to study pressure is the amount of.
In the end, it is necessary to pay attention to the packaging and placement of the injection parts. This is very important, otherwise, all our efforts will come to naught. Under normal circumstances, can be the injection side of the packing, of course, also according to the shape of the injection parts to determine the form of display. In short, can not let the injection molding pieces of each other, and can not make a part of the injection molding part of the hanging, or a few days after the injection will begin to deformation
Bottle blowing machineProfessional manufacturerASNTO|SNTO|Xintai bottle blowing machineHuangyan Zhejiang Plastic Machinery Factory

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