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Fluororesin-coated member, mold comprising the member for polyester container molding, and method of regenerating the mold

A technology for forming molds and fluororesin, which is applied to other household appliances, coatings, household appliances, etc., can solve the problem of taking a long time, achieve the effects of easy regeneration, improve wear resistance, and prevent adhesion and accumulation

Inactive Publication Date: 2007-09-05
TOYO SEIKAN KAISHA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] Also, regarding the regeneration method of the mold release film in Patent Document 3, since the amorphous fluororesin film is washed and dissolved by using a fluorine-based inert liquid, it is impossible for the above-mentioned amorphous fluororesin film to be completely removed and reach the base. mirroring, otherwise it takes a considerable amount of time to process

Method used

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  • Fluororesin-coated member, mold comprising the member for polyester container molding, and method of regenerating the mold
  • Fluororesin-coated member, mold comprising the member for polyester container molding, and method of regenerating the mold
  • Fluororesin-coated member, mold comprising the member for polyester container molding, and method of regenerating the mold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] 1. Fabrication of Biaxial Stretch Blow Molding Mold

[0111] (1) Mold making

[0112] The aluminum 7075-T651 material (hardness Hv300g: 190) used as the base of the mold is cut and processed to make a mold (two divided master molds), which can be biaxially stretched and blow-molded to produce a bottle diameter: 65mm, removing the mouth Height: 185mm, content: 500ml Polyester bottle with a cylindrical cross section.

[0113] Afterwards, the surface of the mold is ground with a grinding wheel for precision processing, and then, the silicon carbide raw material powder with a particle size distribution of several μm to tens of μm is treated by blowing shot peening within a few seconds under a pressure of 0.1Mpa. To carry out rough surface processing until the mean square gradient Δq1 of surface roughness reaches 10 degrees.

[0114] (2) Formation of fluororesin layer

[0115] The above-mentioned mold was cleaned with alcohol, and an amorphous fluororesin [AF2400] (glass ...

Embodiment 2

[0120] Use the quenched and tempered material of 13 chromium (13Cr) manganese-containing stainless steel (Hitachi Metals (Co., Ltd.) HPM38, hardness Hv300g: 550) as the base of the mold, and perform rough surface processing until the mean square gradient Δq1 of the surface roughness is 6. degree, then in the formation of the mold base fluororesin layer, dissolve the solution of the fluororesin to make the concentration 0.6% by weight / volume, then spray it on the surface of the mold, and sinter the fluororesin in an electric furnace at 340°C for 30 minutes. Heating and melting, except for the formation of a coating amount of 5g / m 2 1. Except for the fluororesin layer whose mean square gradient Δq2 of surface roughness was 3 degrees, the same fluororesin coating mold and polyester container as in Example 1 were produced, and then similarly evaluated. Also, there was no change in the hardness of the base material after sintering.

Embodiment 3

[0122] In Example 1, the surface of the aluminum 7075-T651 material of the mold base is ground, and a hard layer with an average thickness of 20 μm formed by the electroless nickel-phosphorus alloy plating layer is set on the surface (hardness Hv25g: 600 ) as the base of the mould, the above-mentioned hard layer is subjected to precision processing with a grinding wheel, and then, except that the average average gradient Δq1 of the surface roughness reaches 2 degrees by shot blasting, it is made into the same as that of the embodiment 1 same mold.

[0123] In addition, in the formation of the fluororesin layer on the surface of the mold, the solution of the fluororesin is dissolved to make the concentration 0.6% by weight / volume, sprayed on the surface of the mold, and fired in an electric furnace at 360°C for one and a half hours to carry out the fluorine resin solution. Heated and melted, except for the formation of a coating amount of 0.5g / m 2 Except for the fluororesin la...

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Abstract

A fluoropolymer resin coated member in which the fluoropolymer resin layer has been improved in wear resistance and peeling resistance. When the coated member is used to form a mold for polyester container molding, part of a polyester resin or an oligomer ingredient or additive contained in the polyester resin is prevented from depositing on the mold surface. And a polyester container with excellent luster and transparency can be manufactured. The fluoropolymer resin coated member (1) comprise a foundation (10) and a fluoropolymer resin layer (20) formed thereon, the foundation (10) having a surface roughness of 2 to 10 degree in Root-mean-square slope of profile, the amount of the fluoropolymer resin of the fluoropolymer resin layer (20) being 0.5-8.5 g / m 2 , and the surface roughness of the fluoropolymer resin layer being 5 degree or less in Root-mean-square slope of profile q2. The metal mold for forming polyester resin container can be reproduced in such a manner that amorphous fluoropolymer resin layer 20 applied on the hard surface of foundation 10 of the metal mold for forming polyester resin container is removed by abrasive to obtain mirror finish, then a new amorphous fluoropolymer resin layer 20 is applied on the surface of foundation 10.A fluororesin-coated member in which the fluororesin layer has been improved in wearing resistance and adhesion to the base. When the coated member is used to form a mold for polyester container molding, part of a polyester resin or an oligomer ingredient or additive contained in the polyester resin is prevented from depositing on the mold surface and a polyester container excellent in gloss and transparency can be molded. The fluororesin-coated member (1) comprise a base (10) and a fluororesin layer (20) formed thereon, the base (10) having a surface roughness of 2-10 DEG in terms of mean square slope q1, the amount of the fluororesin deposit constituting the fluororesin layer (20) being 0.5-8.5 g / m<sup.

Description

technical field [0001] The present invention relates to a resin molding member for molding resin containers for beverages, food, cosmetics, etc., especially bottles, cups, and discs that can be filled with tea, water, fruit juice, wine, coffee, etc. A fluororesin-coated member for container molding such as polyester resin, a mold for forming a polyester container composed of the member, and a method for regenerating the mold. Background technique [0002] Polyester containers such as PET (polyvinyl terephthalate) resin can be represented by containers such as bottles, cups, and plates, which are excellent in transparency, impact resistance, and gas barrier properties. It is produced and used in various forms, and its manufacture has formed an important field in the industry. For example, a bottle in a polyester container is heated in a temperature range of 100°C to 180°C above the glass transition temperature (Tg) by injection molding the preform (Preform) in a molding mold...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/38B29C49/48B29L22/00B29K67/00
CPCB29B2911/1404Y10T428/24364B29B2911/14713Y10T428/1355B29B2911/14026B29B2911/1402B29C33/56B29K2067/00B29B11/08B29B2911/14906B29B2911/14533Y10T428/27B29L2031/7158B29B2911/14133Y10T428/31678B29K2027/12B29B2911/147B29C49/06Y10T428/3154B29B2911/14653B29B2911/14033Y10T428/273B29K2105/253B29B2911/14106B29C2949/24B29C2949/26B29C2949/28B29C2949/22B29C2949/3024B29C2949/3032B29C2949/0794B29C2949/082B29C2949/0827B29C2949/0829B29C2949/0862B29C2949/0715B29C33/38B29C49/48B29L2022/00
Inventor 佐野广喜高崎泰裕佐藤一弘
Owner TOYO SEIKAN KAISHA LTD
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