Injection mould and mould opening method thereof

Abstract

The invention discloses an injection mould and a mould opening method thereof. The mould opening method includes the steps that a part template to be subjected to injection moulding is manufactured, a part to be subjected to injection moulding is divided into at least two portions according to different shrinkage amounts, reserved shrinkage amounts are set on the portions with the large shrinkage amounts, and the at least two portions are in transition connection in sequence; and a mould cavity is manufactured according to the part template to be subjected to injection moulding. In the mould opening method mentioned above, differences between the shrinkage amounts of all the portions of the part to be subjected to injection moulding are taken into consideration, the part to be subjected to injection moulding is divided into the at least two portions, and in other words, the portions with the large shrinkage amounts are separated from the portion with the small shrinkage amount. When the template is manufactured, the reserved shrinkage amounts are set on the portions with the large shrinkage amounts, then, the portions with the large shrinkage amounts are in transition connection with the other portion in sequence, and therefore in the cooling shrinkage process, all the portions gradually tend to be consistent, in this way, it can be effectively ensured that injection moulding meets the design requirement, meanwhile, the appearance quality effect can be ensured, mould repair does not need to be repeatedly conducted in the production process, and cost control is facilitated.

Description

technical field [0001] The invention relates to the technical field of mold equipment, in particular to an injection mold and a mold opening method thereof. Background technique [0002] Injection molded parts are an important component of various equipment such as mobile phones and air conditioners. Since the injection molding material will shrink to a certain extent during the cooling process, the shrinkage rate of each part of the injection molded part is affected by factors such as wall thickness and inserts. Inconsistency will cause the injection molded parts not to meet the design requirements. At present, the above problems are often avoided by adjusting the injection molding parameters or repairing the mold. [0003] In the prior art, take the mobile phone insert cover as an example, please refer to figure 1 and figure 2 , figure 1 It is a split view of the mobile phone insert face shell in the prior art, figure 2 It is a schematic diagram of the structure of t...

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Problems solved by technology

[0002] Injection molded parts are an important component of various equipment such as mobile phones and air conditioners. Since the injection molding material will shrink to a certain extent during the cooling process, the shrinkage rate of each part of the injection molded part is affected by factors such as wall thickness and inserts. Inconsistency will cause the injection molded parts to not meet the design requirements. At present, the above problems are often avoided by adjusting the injection molding parameters or repairing the mold.

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