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Plastic processing plant analyzes the precautions in plastic processing

2019-04-02 15:31
I believe that many plastic processing plants will encounter some problems in the production process, such as: shortened plastic processing, thick plastic parts, etc. Below we have a plastic processing plant to analyze these problems for everyone.
 
1. One of the common problems in the processing of plastics in plastic processing plants is the shortening of plastic processing. This problem is a problem that shortens the plastic products with high surface quality requirements. Therefore, following the continuous improvement of the plastic processing technology, the problem of shortening the plastic processing is reduced to the utmost extent, and the quality of the advanced products is imperative.
 
2. There may be one or more reasons for shortening the plastic processing, including processing methods, component geometry, material selection, and mold planning. The choice of geometry and material is generally chosen by the raw material supplier and is not abbreviate. But moldmakers still have a lot of elements about mold planning that may affect the shortening of plastics processing. Cooling runner planning, gate type, gate size may have multiple effects. For example, small gates such as tubular gates cool much faster than tapered gates. Premature cooling at the gate reduces the moment of filling in the cavity and then increases the chance of shortening the attack. With regard to molding workers, adjusting the processing conditions is one way to deal with the problem of shortening plastic processing. Filling pressure and time have a significant impact on shortening. After the part is filled, the remaining material continues to fill the cavity to compensate for the shortening of the material. Too short a filling phase will result in a shortening of the shortening, which will eventually result in more or larger shortening marks. This method of processing the plastics processing shortening may not reduce the shortening marks to a satisfactory level by itself, but the molding worker can adjust the filling conditions to improve the shortening marks.
 
3. In the plastic processing process, the plastic parts are thicker, and the shortening of the ribs or protrusions is more severe than the nearby ones, because the thicker areas are cooled much more slowly than the surrounding areas. The difference in cooling rate results in a collapse at the joint surface, which is known as a shortening mark. This shortcoming severely limits the planning and molding of plastic products, especially large thick-walled products such as the beveled casing and display casing of television sets. In fact, it is necessary to eliminate the shortening marks on the demanding products such as household electrical appliances, and some products with low surface quality requirements such as toys promise to have the defects of plastic processing.
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