• How to Choose a Good Chinese Injection Mold Company? Nov 08, 2018
    It is very important to choose a good mold manufacturer, because they not only can provide you with satisfactory molds, but also can make the after-sales easy. When the customer encounters a production problem, they can also consult these professional mplasold manufacturer, they will provide good advice to customers in many aspects such as design, production, etc., can save costs, improve eff...
  • Injection Molding and Temperature Nov 08, 2018
    Based on the grade you are using, checking the coefficient of linear thermal expansion.  It will depend on which stage your weld lines are formed. If you have a high molecular weight material and the weld area is during the initial stages of filling, the weld strength may be good in both climates. If your weld area is towards the end of filling,  a grade with higher elongation property m...
  • Test questions of plastic injection molds (1) Nov 16, 2018
    The test is an essential part of the new mold before injection molding, or when the machine is replaced with other molds. The quality of the test results will directly affect whether the subsequent production of the factory is smooth or not. So, what are the common problems in the mold test? Today we will take a detailed inventory for a reference. 1.Short molding: mainly due to insufficient feedin...
  • Solution for surface burning of mold Nov 16, 2018
    Injection molds are often burned for some reason during production.Depending on the cause of the burn, such as machine, mold, or molding conditions, there are different solution. 1. Mechanical reasons: overheating of the cylinder due to abnormal conditions; or stagnation of the resin due to the nozzle and screw thread.At this time, the nozzle, screw and barrel should be cleaned. 2. The cause of th...
  • Test questions of plastic injection molds (2) Nov 23, 2018
    Let’s go on from last article about discussing the common problems in the mold test. 6.Gate sticking: due to mechanical resistance in the sprue bushing, insufficient cooling or failure of the pulling bar, the gate sticks in the sprue bushing. 7.Poor demolding: due to excessive filling, poor mold release performance, etc., the plastic parts are difficult to demold or the plastic parts are deformed ...
  • The solution of bubble issue during injection molding process Nov 23, 2018
    According to the causes of bubbles, the countermeasures are as follows: (1) When the wall thickness of the product is large, the cooling speed of its external surface is faster than that of the central plastic part. Therefore, as the cooling goes on, the resin at the central part shrinks and expands towards the surface, resulting in insufficient filling at the central part. This condition is calle...
  • Ten principles of mold design for P/L (1) Nov 30, 2018
    1. Consideration of clamping force The lateral clamping force of the mold is relatively small, so for a large product with a large projection area, the direction of the large projection area should be placed in the direction of the mold opening and closing. 2. Meet the product release requirements The parting surface is also for the product to be able to take out the mold smoothly. Therefore, the ...
  • How to improve the quality of molds? Nov 30, 2018
    There are 3 basic ways to improve the quality of molds. Firstly, mold design is the most important step to improve the mold quality. Many factors need to be taken into account, including the selection of steel materials, the usability and safety of mold structure, the machinability of  parts and the convenience of mold maintenance. All above factors should be considered at the very beginning ...
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A total of 28 pages

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