EPS vacuum forming process and forming system

A vacuum forming and process technology, which is applied in the field of expandable polystyrene molding, can solve the problems of easy hardening on the surface of EPS foam products, poor fusion of finished products, and slow penetration speed, etc., and achieve internal fusion of EPS foam products Excellent, reduce mold temperature, reduce the effect of heat transfer

Inactive Publication Date: 2016-11-09
HUIZHOU JINGHUA PACKAGING PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing positive pressure penetration heating method has the following disadvantages: firstly, the penetration speed is slow during diffusion penetration; The surface of the final EPS foam product is prone to compaction, resulting in poor internal fusion of the finished product

Method used

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  • EPS vacuum forming process and forming system
  • EPS vacuum forming process and forming system
  • EPS vacuum forming process and forming system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment provides an EPS vacuum forming process. The specific process flow is as follows, including: preheating, mold clamping, mold filling, heating, cooling and demoulding processes. In the prior art, the heating process adopts the positive pressure penetration heating method , In this embodiment, the negative pressure penetration heating method is adopted, and the negative pressure penetration heating method is specifically described as follows.

[0023] In the molding process of EPS foam products, the mold is preheated first, then the mold is closed, and the matured EPS foam particles are filled into the cavity of the mold, and then the heating process starts. Among them, in the heating process, high-temperature and high-pressure steam is passed into the mold 2 from the steam hole 4 on one side wall of the mold 2, and while the high-temperature and high-pressure steam is passed through, the steam hole 4 communicated with the steam hole 4 is provided on the mol...

Embodiment 2

[0054] The present embodiment provides a kind of EPS vacuum forming system, such as figure 1 As shown, the EPS vacuum forming system includes: a steam delivery device 1 , a valve 6 , a mold 2 , a vacuum valve 7 and a vacuum machine 3 . The side wall of the mold 2 is provided with a steam hole 4 and a vacuum hole 5, wherein the steam hole 4 is located on one side wall of the mold 2, and the vacuum hole 5 is located on the other side wall of the mold 2 opposite to one side wall. , the steam hole 4 communicates with the true air hole 5; the output end of the steam delivery device 1 communicates with the steam hole 4 through the valve 6, and the vacuum hole 5 is connected with the vacuum machine 3 through the vacuum valve 7. Here, there can be only one steam conveying device 1, and the output end of this steam conveying device 1 is respectively connected to different steam holes 4 through a valve 6, that is, each steam hole 4 is equipped with a valve 6, each The steam hole 4 is c...

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Abstract

The invention discloses an EPS vacuum forming process and forming system. The forming process comprises a heating procedure, wherein in the heating procedure, high-temperature and high-pressure steam is injected into a mold from steam holes in one side wall of the mold; meanwhile, through vacuum holes which communicate with the steam holes and are positioned in the other side wall, relative to the above side wall, of the mold, vacuum pumping treatment is performed on the interior of the mold, thereby forming a negative pressure difference between two relative sides of the mold; the steam linearly penetrates through the mold through the steam holes in one side wall of the mold, and reaches the vacuum holes on the other side, relative to the above side wall, of the mold; and when the steam linearly penetrates through the interior of the mold, the mold and EPS beads in the mold are heated. The EPS vacuum forming process and forming system have the advantages that a linear negative-pressure penetrating mode is adopted, thereby saving the penetrating time, reducing the heat exchange amount, and lowering the steam consumption; the linear penetrating speed is high, and the steam pressure almost remains unchanged in the penetrating process; and accordingly, almost no hardening phenomenon occurs on the surface of a formed EPS foam finished product, and the internal clinkering property is more excellent.

Description

technical field [0001] The invention relates to the field of forming expandable polystyrene, in particular to an EPS vacuum forming process and a forming system. Background technique [0002] In the molding process of EPS (Expandable Polystyrene) foam products, it is necessary to heat the matured EPS foam particles filled in the mold cavity. At present, the common heating method at home and abroad is positive pressure penetration heating. , when the positive pressure is penetrated and heated, the steam enters the mold from one side of the mold, the pressure increases continuously, and a positive pressure difference is formed on the opposite sides of the mold. The EPS beads filled in the mold cavity are heated to make the EPS beads expand and form. [0003] The existing positive pressure penetration heating method has the following disadvantages: firstly, the penetration speed is slow during diffusion penetration; The surface of the final EPS foam product is prone to harden...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C44/34B29C44/02B29C44/44
CPCB29C44/3426B29C44/02B29C44/445
Inventor 周振兴杨世东彭小敏
Owner HUIZHOU JINGHUA PACKAGING PROD CO LTD
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