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Mold for molding expanded resin and process for producing same

A technology of foaming resin and manufacturing method, applied in the direction of coating, etc., can solve problems such as lack of adhesion to aluminum molds, difficulties in mold construction, construction difficulties, etc., and achieve good constructability, good thermal efficiency, and high thermal insulation performance Effect

Inactive Publication Date: 2016-09-14
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the EPDM rubber inner liner has no adhesion to the aluminum mold, it is fixed to the mold back plate by combining bolts with the aluminum plate, which is costly and difficult to construct.
Furthermore, the construction of the entire mold is difficult, and usually only a part of the moving side of the back plate can be constructed, so there is also a problem that sufficient heat insulation cannot be provided to the entire mold.

Method used

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  • Mold for molding expanded resin and process for producing same
  • Mold for molding expanded resin and process for producing same

Examples

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Embodiment 1

[0052] 50 parts by mass of linear dimethyl polysiloxane with a viscosity of 20,000 mPa·s at 25° C., 50 parts by mass of calcium carbonate, methyl tri(methyl trimethylpolysiloxane) and 10 parts by mass of ethyl ethyl ketoxime) silane, 1 part by mass of 3-aminopropyltriethoxysilane, and 0.1 part by mass of dibutyltin dilaurate until uniform, and then mixed with 30 parts by mass of xylene to prepare the viscosity at 25°C A liquid room temperature curable silicone rubber composition of 5 Pa·s.

[0053] In the mold cavity volume is 0.05m 3 , The inner wall surface (whole surface) of the aluminum foamed polystyrene molding mold main body with a thickness of 20 mm is coated with the above-mentioned liquid room temperature curable silicone rubber composition by 2 coats of brushes, and placed in the air at room temperature ( 25° C.) for 24 hours, a silicone rubber layer (coating layer) with a thickness of 2 mm and a JIS-A hardness of 60 specified in JIS K 6249 was formed on the inner ...

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Abstract

A mold for molding an expanded resin, wherein a silicone rubber layer (40) having a JIS-A hardness of 20 to 70 is formed as a heat-insulating layer at least on a part or the whole of the inner wall surface that forms a cavity (20) of a mold main body (10) which is for use in molding an expanded resin and which is made of an aluminum material. This mold for molding an expanded resin is effectively usable in molding expanded polystyrene or the like by a bead molding method, and can produce a molded product of an expanded resin with high thermal efficiency by virtue of high heat insulation performance. Further, the mold can be easily produced with good execution efficiency.

Description

technical field [0001] The present invention relates to a mold for molding foamed resin such as foamed polystyrene made of aluminum material and a manufacturing method thereof. Background technique [0002] Conventionally, an expanded bead molding method is known for molding expanded polystyrene. It is to fill EPS (expanded polystyrene, bead method expanded polystyrene) raw materials into the aluminum mold cavity, usually introduce steam at 100°C and about 1 pressure, heat and melt the EPS beads, and obtain foam. Styrofoam molded body. [0003] However, since aluminum molds have good thermal conductivity, the heat released from the mold during the heating process is large. Usually, in order to maintain the prescribed mold temperature in the molding process, it is necessary to use a large amount of heat medium such as steam to heat the mold. Heating-insulation, so the thermal efficiency is reduced, and the cost of raw materials is thus increased. [0004] Because, in order...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C44/00B29K25/00B29K105/04
CPCB29K2105/048B29K2025/06B29K2995/0015B29K2995/007B29C33/38B29C33/405B29C33/56B29C44/445B29C44/58B29K2883/005B29K2905/02B29C44/3426B29C44/3461B29C44/583B29C44/60
Inventor 石本龙太萩原隆上山正人敕使河原守坂本隆文
Owner SHIN ETSU CHEM IND CO LTD
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