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0769-85315080 |
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0769-85315046 |
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Mr.Dong |
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No,15 Xinle Road,Wusha Jiangbei village,Changan town,Dongguan city |
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Plastic mold design should pay attention to which points?
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| Time：2017.03.27 News Sources： Views： |
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1, product wall thickness
(1) all kinds of plastic has a certain thickness range is 0.5 ~ 4mm, when the wall thickness is more than 4mm, will cause the cooling time is too long, which reduce and other issues, should consider changing the product structure.
(2) uneven wall thickness will cause surface shrinkage.
(3) uneven wall thickness will cause pores and weld marks.
2, mold opening and parting line
In the beginning of the design of each injection molding products, we must first determine the direction of the mold and parting lines, to ensure that as far as possible to reduce the core pulling mechanism and eliminate the impact of the parting line on the appearance.
(1) the parting direction is determined, the products of rib, buckle, convex structure as much as possible consistent with the direction of mold design, in order to avoid pulling reduce joint line, prolongs the service life of the mould.
(2) to determine the direction of the mold, you can choose the appropriate parting line, to avoid the opening direction of the existing button to improve the appearance and performance.
3, stripping slope
(1) draft the appropriate product (Garland) can avoid napping. The draft should be greater than or equal to 0.5 degrees on the surface of smooth, fine skin texture (sand surface) surface is greater than 1 degrees, rough skin surface is greater than 1.5 degrees.
(2) the appropriate stripping slope can avoid the top injury, such as top white, top deformation, top broken.
(3) deep cavity structure design of products to the outer surface of the inner surface is greater than slope slope, in order to ensure the injection mould core products are no deviation, uniform wall thickness, strength of materials and ensure the opening part of the product.
4, reinforced
(1) the reasonable application of the stiffener can increase the rigidity of the product and reduce the deformation.
(2) must be less than or equal to the thickness of the stiffener (0.5 ~ 0.7) T wall thickness, otherwise cause surface shrinkage.
(3) reinforced (Shanghai mold design training school) single slope should be greater than 1.5 degrees, in order to avoid top injury.
5, fillet
(1) rounded corners are too small to cause stress concentration, resulting in cracking of the product.
(2) the fillet is too small to cause the stress concentration of the mould cavity, which leads to the cracking of the cavity.
(3) set up the reasonable fillet, also can improve the mold processing technology, such as cavity can be directly with the R knife milling processing, and to avoid the low efficiency of the electrical processing.
(4) different fillet may lead to the movement of parting line, should be combined with the actual situation to choose different rounded or clear angle.
Long power precision (Hongkong) Co., Ltd.
Dongguan wins Electronic Technology Co., Ltd.
Address: Dongguan city Changan town of Sha Jiang Pui Xinle Road No. 15
Telephone: 0769-85315080
Fax: 0769-85315046
Contact: Manager
Mobile: 15999779289
Website: http://www.js-dg.com/
Email: jiusheng@js-dg.com |
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