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A method of shortening the cycle time of injection molding

A technology of injection molding and cavity, which is applied in the field of injection molding technology, can solve problems such as unacceptable processing methods, and achieve the effects of reducing high pressure release time, shortening production cycle, and saving mold clamping time

Active Publication Date: 2019-01-25
东莞富强鑫塑胶机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the production of products whose cooling time is greater than the feeding time, if the existing processing method is used, the injection molding machine can inject materials into the mold after the three processes of releasing the mold pressure, ejecting the molded product, and closing the mold. Continue processing, considering the processing efficiency of the enterprise, such a processing method is obviously not advisable

Method used

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  • A method of shortening the cycle time of injection molding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment one: a kind of method of shortening injection molding cycle, comprising:

[0025] Step 1: mold closing step, the movable mold and the fixed mold are closed to form a cavity;

[0026] Step 2: Injection pressure holding step, the injection molding machine inserts the nozzle into the main channel of the fixed mold, and injects the heated and melted material into the cavity through the main channel;

[0027] Step 3: Cooling and feeding steps, the cooling system starts to cool the mold and perform feeding actions at the same time;

[0028] Step 4: Pre-mold opening step. During the cooling process of the product, adjust the clamping pressure to between 70% and 90% of the predetermined clamping pressure, and then open the movable mold and the fixed mold to a predetermined distance to release the moisture in the mold. High pressure, the predetermined distance is less than the mold opening distance, and increases with the predetermined clamping pressure;

[0029] St...

Embodiment 2

[0032] Embodiment 2: The difference from Embodiment 1 is that in this embodiment, in order to prevent the product in the cavity from being damaged by the movable mold when the mold is opened, the mold opening speed when the movable mold and the fixed mold are opened Adjusted to 35%; the rest of the content is the same as in Embodiment 1, so it will not be repeated.

Embodiment 3

[0033] Embodiment 3: The difference from Embodiment 1 is that in this embodiment, when the mold opening pressure is set to 70% in step 4, the predetermined distance between the movable mold and the fixed mold is 70 mm; the rest of the content and implementation Example 1 is the same, so it is not repeated here.

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Abstract

The invention provides a method for shortening an injection molding period. The method comprises the step one of mold assembly; the step two of ejection pressure maintaining; the step three of cooling and feeding; the step four of mold pre-opening, wherein mold locking pressure is adjusted to be 70%-90% of preset mold locking pressure, then a movable mold and a fixed mold are opened to the preset distance so as to relieve high pressure in the mold, the preset distance is smaller than the mold opening distance, and the preset distance is increased along with increase of the mold locking pressure; the step five of mold opening, wherein the mold is opened to the mold opening distance needed for taking out finished products, the finished products are ejected, and one forming period is finished; and the step six of reciprocating from step one to step five. The method has the beneficial effects that in the product cooling process, the mold locking pressure is adjusted to be 70%-90% of the preset mold locking pressure, the movable mold and the fixed mold are opened to the preset distance, high pressure relief time needing to be consumed by the products after cooling is shortened, high pressure relief time of the cooled products in the cavity is shortened, and the purpose of shortening the period of product production is achieved.

Description

technical field [0001] The invention relates to the technical field of injection molding technology, in particular to a method for shortening the cycle of injection molding. Background technique [0002] Injection mold is a tool for producing plastic products, which can mass-produce some parts with complex shapes through injection molds. [0003] The process of producing plastic products in the existing injection mold is: close the mold, and then inject the material into the mold through high pressure by the injection molding machine that has added the heated and molten material. After the material is cooled and solidified, the high pressure in the mold is released, and the mold is opened. Then eject the formed product to complete a set of processing procedures. [0004] In the process of processing, in order to improve the processing efficiency, the existing processing methods often add heated and melted materials to the barrel while the material in the mold cools and soli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/76B29C45/77B29C45/73
CPCB29C45/73B29C45/76B29C45/7653B29C45/77B29C2945/76498
Inventor 王伯埙
Owner 东莞富强鑫塑胶机械制造有限公司