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Tube blank injection molding method and tube blank mold for large-capacity plastic bottle

An injection molding and plastic bottle technology, which is used in the field of tube blank injection molding and tube blank mold for large-capacity plastic bottles, can solve problems such as difficulty in ensuring quality, and achieve good appearance and performance, good plasticization, and good cooling effect.

Active Publication Date: 2016-09-28
湖南昊兴机械科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to propose a new one-step injection stretch blow molding method for the current domestic production of one-step injection stretch blow molding equipment, which has the problem that multi-station is difficult to ensure the quality

Method used

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  • Tube blank injection molding method and tube blank mold for large-capacity plastic bottle
  • Tube blank injection molding method and tube blank mold for large-capacity plastic bottle
  • Tube blank injection molding method and tube blank mold for large-capacity plastic bottle

Examples

Experimental program
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Effect test

Embodiment 1

[0036] as attached Figure 1-3 As shown, the preform mold of a preform injection molding method for large-capacity plastic bottles adopts a vertical mold opening, including a preform cavity 1 and a preform core 2, and the preform core 2 is installed on the core positioning sleeve 3; a cavity bottom 4 is connected under the tube embryo cavity 1, and a die 5 is pressed on the tube embryo cavity 1; the tube embryo cavity 1, the tube embryo mold core 2, the cavity bottom 4 and the die 5 combined to form a tube embryo mold, which is characterized in that a deep hole blind hole 6 is opened in the tube embryo mold core 2, and the deep hole blind hole 6 extends into the bottom of the tube embryo mold core 2, and is inserted into the deep hole blind hole 6 A cooling pipe 7, there is a gap between the cooling pipe 7 and the blind hole of the deep hole; the cooling medium is cooled by oil, and the cooling oil comes out of the oil temperature machine and is transported to the blind hole o...

Embodiment 2

[0043] The basic structure of the second embodiment is the same as that of the first embodiment, except that all the blocks are connected into one baffle plate 21, and the baffle plate 21 is axially embedded in all the annular grooves 22 of the mold core sleeve, and then misaligned on both sides of the baffle plate 21 Open the gap 23, so that the cooling oil flows according to the aforementioned flow direction (as attached figure 2 shown).

[0044] The part where the top of the first hot runner is in contact with the bottom mold of the cavity is provided with a heat insulation pad so that the high temperature of the first hot runner will not be transmitted to the bottom mold of the cavity. The heat insulation pad is a paper pad with a thickness of 0.5-2 mm.

Embodiment 3

[0046] Embodiment 3 has the same basic structure as Embodiment 1, except that the cooling channel 9 formed between the tube blank cavity 1 and the outer surface of the cavity bottom 4 adopts a spiral channel structure, and the cooling medium is oil-cooled or water-cooled. The medium forms a spiral circulating cooling channel in the tube embryo cavity and the outer periphery of the bottom of the cavity.

[0047] The tube embryo mold core is also cooled by oil or water, and the cooling medium comes out of the oil temperature machine and is transported to the deep hole blind hole of the tube embryo core through the cooling pipe, and then passes through the cooling pipe and the periphery of the deep hole blind hole. Some gaps return to realize temperature-controlled cooling of the tube blank mold core.

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Abstract

A tube preform injection molding method and tube preform mold for large-capacity plastic bottles. The injection molding method is used to inject injection material into a temperature-controlled tube preform mold for injection molding. The tube preform is characterized in that the tube preform mold adopts multiple channels as a whole The cooling structure, the preform mold core and the preform cavity are all cooled by temperature control, and the cooling medium is controlled by the temperature control equipment, so that the temperature of the cooling oil for the preform core is controlled at 50‑60 ° C, and the preform cavity is cooled The oil temperature is controlled at 45-55°C; at the same time, the hot runner at the bottom inlet is divided into three parts, each part adopts different heat preservation, so that the remaining material that does not enter the cavity is kept warm, and the remaining material will not flow out. The present invention adopts a multi-channel cooling structure as a whole, and implements different temperature controls on different parts through the temperature control device, which can effectively control the product forming temperature, ensure the product forming quality, and prevent the remaining material from hardening or flowing out.

Description

technical field [0001] The present invention relates to a method and device for processing and molding plastic products, in particular to a method and device for injection molding tube blanks in the integrated production process of injection, stretching and blowing of large-capacity plastic bottles, and is mainly used for making large-capacity plastic bottles , It can also be used in the production of other high-demand plastic bottles and plastic containers. The invention belongs to the technical field of plastic processing manufacturing methods and equipment. Background technique [0002] With the rapid development of plastics and their products, plastic processing and manufacturing has gradually developed into a huge industrial cluster, and almost all walks of life are using plastic products. With the continuous development of the demand for plastic parts, the methods of plastic processing are also constantly updated. Injection molding is one of the main plastic molding ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/26B29C45/27B29C45/73B29C45/78B29C49/06
CPCB29C45/26B29C45/2642B29C45/27B29C45/2737B29C45/78B29C49/06B29C2945/76531B29C2049/023
Inventor 李高虎李鑫水李晓清
Owner 湖南昊兴机械科技有限公司
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