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Frosted cover plastic product injection molding process

A frosted cover and plastic technology, which is applied in the field of injection molding of plastic products, can solve the problems of complex injection molding process parameter setting, poor internal bonding force of products, and difficulty in guaranteeing quality stability. The effect of industrialized production and reduction of scrap rate

Inactive Publication Date: 2018-12-18
浙江飞腾模塑股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Otherwise, the internal bonding force of the product is not good, and the quality stability is difficult to guarantee
Moreover, the parameter setting of the injection molding process is relatively complicated, and the control stability is not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In this embodiment, the injection molding process of the frosted lid plastic product includes at least the following processes: storage section, extrusion section, mold opening, mold closing, injection, and pressure holding. The temperature section of the hot runner of the injection molding mold is Including: the first section 277°C, the second section 277°C, the third section 270°C, the fourth section 285°C, the fifth section 278°C, and the sixth section 270°C. The samples are comprehensively counted in 3 consecutive batches, and the qualified rate of the sampled products is over 99%.

Embodiment 2

[0025] In this embodiment, the injection molding process of the frosted lid plastic product includes at least the following processes: storage section, extrusion section, mold opening, mold closing, injection, and pressure holding. The temperature section of the hot runner of the injection molding mold is Including: the first section 279°C, the second section 278°C, the third section 273°C, the fourth section 288°C, the fifth section 275°C, and the sixth section 274°C. The samples are comprehensively counted in 3 batches of discontinuous batches, and the qualified rate of the sampled products reaches more than 99%.

Embodiment 3

[0027] In this embodiment, the injection molding process of the frosted lid plastic product includes at least the following processes: storage section, extrusion section, mold opening, mold closing, injection, and pressure holding. The temperature section of the hot runner of the injection molding mold is Including: 280°C in the first section, 280°C in the second section, 275°C in the third section, 290°C in the fourth section, 273°C in the fifth section, and 275°C in the sixth section. The samples are comprehensively counted in 3 consecutive batches, and the qualified rate of the sampled products is over 99%.

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PUM

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Abstract

The invention discloses a frosted cover plastic product injection molding process which comprises at least the following process steps: a storage procedure; an extrusion procedure; mold opening; moldassembly; injection; and pressure maintaining, wherein a hot running of a mold used for injection molding comprises the following temperature sections: a first section of 277-280 DEG C, a second section of 277-280 DEG C, a third section of 270-275 DEG C, a fourth section of 285-290 DEG C, a fifth section of 273-278 DEG C, and a sixth section of 270-275 DEG C. Through the precise control of processparameters of all the sections in the frosted cover plastic product injection molding process disclosed by the invention, not only can the injection molding fluid quality control be achieved, but also the injection molding product quality and the injection molding efficiency can be improved, and the scrap rate can be lowered.

Description

Technical field [0001] The invention relates to an injection molding process for plastic products, in particular to an injection molding process for frosted lid plastic products. Background technique [0002] Injection molding is a method of industrial product production. Generally, an injection molding machine is used to make thermoplastic or thermosetting materials into various shapes of plastic products using plastic molding molds. In the existing injection molding process, a single material is used for injection molding, and some materials are used for injection molding. The co-injection of multiple materials requires that the chemical properties of the materials are similar, because the properties of various materials cannot be completely the same. In addition, some auxiliary materials, such as toner, dispersant, etc., must be added to the material. Otherwise, the internal bonding force of the product is not good, and the quality stability is difficult to guarantee. Moreov...

Claims

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Application Information

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IPC IPC(8): B29C45/76B29C45/77B29C45/78
CPCB29C45/76B29C45/77B29C45/78B29C2945/76498B29C2945/76531B29C2945/76561B29C2945/76568B29C2945/76595
Inventor 俞伟江
Owner 浙江飞腾模塑股份有限公司