Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Silica gel mold material for casting metal ornament and its application

A technology of casting molding and mold materials, which is applied in casting molding equipment, metal processing equipment, casting molds, etc., can solve the problems of poor thermal conductivity of silicone rubber, affecting the quality of jewelry and production efficiency, and the service life of molds and inability to dissipate heat. Effects of extended service life, light and easy handling, good thermal conductivity

Inactive Publication Date: 2007-11-07
ZHEJIANG NEOGLORY JEWELRY CO LTD +1
View PDF0 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In addition, compared with metal materials, silicone rubber has poor thermal conductivity, and its thermal conductivity is generally only 0.16W / (m K), which cannot effectively and quickly dissipate the heat released during the casting and curing of metal ornaments to the surroundings. In the environment, it affects the quality and production efficiency of the jewelry and the service life of the mold

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Into 100 parts by weight of polymethylvinylsiloxane (terminated by trimethylsiloxane and made from 99.88% dimethylsiloxane units and 0.12% methylvinylsiloxane units) , mixed with the following substances in a kneader at room temperature: first with 30 parts of specific surface area of ​​200m 2 / g of fumed silica is mixed, then mixed with 20.0 parts by weight of heat-conducting additive alumina and 0.5 weight part of heat-resistant additive cerium oxide, and then mixed with 3.5 parts by weight of vulcanizing agent di-tert-butyl peroxide to obtain Mold material.

[0024] The mold material is press-molded at 160°C and 5MPa for 20 minutes, and then subjected to secondary vulcanization at 180°C for 4 hours to obtain a mold for metal jewelry casting. The obtained metal jewelry casting mold has the following physical properties: the Shore A hardness is 51; the elongation is 550%; the thermal conductivity is 0.34W / m·℃; the tensile strength remains after aging at 350℃ for 1 hou...

Embodiment 2

[0026] Into 100 parts by weight of polymethylvinylsiloxane (terminated by trimethylsiloxane and made of 99.65% dimethylsiloxane units and 0.35% methylvinylsiloxane units) , mixed with the following materials in a kneader at room temperature: first with 40 parts of specific surface area of ​​200m 2 / g of fumed silica and 10 parts of calcium carbonate are mixed, then mixed with 5 parts by weight of heat-conducting additive aluminum nitride and 0.5 parts by weight of heat-resistant additive cerium octoate, and then mixed with 2 parts by weight of vulcanizing agent diperoxide The cumene is mixed to obtain the mold material.

[0027] The mold material is press-molded at 170°C and 10MPa for 10 minutes, and then subjected to secondary vulcanization at 180°C for 4 hours to obtain a mold for pouring molding of metal ornaments. The obtained metal jewelry casting mold has the following physical properties: the Shore A hardness is 60; the elongation is 500%; the thermal conductivity is 0...

Embodiment 3

[0029] Into 100 parts by weight of polymethylvinylsiloxane (terminated by trimethylsiloxane and made from 99.88% dimethylsiloxane units and 0.12% methylvinylsiloxane units) , mixed with the following substances in a kneader at room temperature: first with 20 parts of specific surface area of ​​200m 2 / g of fumed silica is mixed, then mixed with 30 parts by weight of heat-conducting additive graphite and 3 parts by weight of heat-resistant additive iron oxide, and then mixed with 0.5 parts by weight of vulcanizing agent 2,5-dimethyl-2, 5-Di-tert-butylperoxyhexane mixed to obtain mold material.

[0030]The mold material is molded at 180° C. and 8 MPa for 8 minutes, and then subjected to secondary vulcanization at 200° C. for 4 hours to obtain a mold for pouring and molding metal ornaments. The obtained metal jewelry casting mold has the following physical properties: the Shore A hardness is 50; the elongation is 570%; the thermal conductivity is 0.39W / m·℃; after aging at 350℃ f...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The silicone rubber mold material for casting metal ornament consists of polysiloxane with vinyl radical 100 weight portions, reinforcing agent 10-80 weight portions, heat conducting assistant 5-30 weight portions, heat resisting assistant 0.3-5 weight portions and vulcanizing agent 0.5-5 weight portions. The mold of the material has high heat conductivity, high heat resistance, less temperature raise, and long service life. In addition, the mold is light and has easy demolding of the metal ornament.

Description

technical field [0001] The invention relates to a silicone rubber mold, in particular to a silicone rubber mold material for casting metal ornaments and its application. Background technique [0002] Metal ornaments with a specific shape, such as hairpins or brooches, are made by pouring the melt of a low-melting-point metal alloy, the raw material of the metal ornaments, into a mold with a specified shape, cooling and solidifying. Generally, molds made of metal materials are used as molds for pouring and molding metal ornaments. This kind of mold is processed by metal to make it have a specified shape. The production cost is high, and there are serious and difficult to operate problems. Additionally, the back and forth from room temperature to the temperature at which the metal is poured can distort the metal mold. [0003] The liquid silicone rubber successfully developed in the second half of the 20th century has the characteristics of excellent simulation, mold release ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B22C1/00
Inventor 申屠宝卿周晓光翁志学陆晓忠甘滕飞陶新姚
Owner ZHEJIANG NEOGLORY JEWELRY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com