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Combined mold and manufacturing method thereof

A technology of combining molds and manufacturing methods, applied in the field of molds, can solve the problems of cracking and spalling, low production efficiency, and high processing cost of metal male molds, and achieve the effects of improving service life, avoiding cracking and spalling, and expanding the scope of use.

Pending Publication Date: 2019-10-11
苏州华特时代碳纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention proposes a combination mold and its manufacturing method, aiming at solving the problem of high design and processing cost of the existing metal male mold and low production efficiency, while the silicone rubber in the silicone male mold is relatively soft and the edge after repeated expansion and pressure There will be cracking and peeling problems in the position

Method used

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  • Combined mold and manufacturing method thereof
  • Combined mold and manufacturing method thereof

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Experimental program
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Effect test

Embodiment 1

[0081] In step S1 of making the female mold, a metal female mold 1 is made according to the outer surface of the product 3, and the metal material can be aluminum, steel, etc.

[0082] Confirmation step S2 of metal embedded parts. In this embodiment, when the product wall thickness z is 2mm, the pressure F required for product molding is 0.6MPa, and the elastic modulus of the silica gel volume is K ΔT Is 721MPa, silica gel volume expansion coefficient α ΔT It is 5.6×〖10〗^(-4) / ℃, the empirical value of wall thickness C' is 5mm, and the temperature difference ΔT between the product curing temperature and room temperature is 120℃. First, use the following formula to calculate the expansion h of the silicone male mold 2 ΔT =1.486mm:

[0083] h ΔT =F / (K ΔT ×α ΔT ).

[0084] The following formula can be used to calculate the wall thickness h=27.144mm of the silicone male mold 2:

[0085] h=h ΔT / (α ΔT ×ΔT)+C',

[0086] Among them, ΔT is the temperature difference between p...

Embodiment 2

[0100] In step S1 of making the female mold, a metal female mold 1 is made according to the outer surface of the product 3, and the metal material can be aluminum, steel, etc.

[0101] Confirmation step S2 of metal embedded parts. In this embodiment, when the product wall thickness z is 2mm, the pressure F required for product molding is 1MPa, and the elastic modulus of the silica gel volume is K ΔT Is 721MPa, silica gel volume expansion coefficient α ΔT It is 5.6×〖10〗^(-4) / ℃, the empirical value of wall thickness C' is 5mm, and the temperature difference ΔT between the product curing temperature and room temperature is 120℃. First, use the following formula to calculate the expansion h of the silicone male mold 2 ΔT =1.486mm:

[0102] h ΔT =F / (K ΔT ×α ΔT ).

[0103] The following formula can be used to calculate the wall thickness h=23.144mm of the silicone male mold 2:

[0104] h=h ΔT / (α ΔT ×ΔT)+C',

[0105] Among them, ΔT is the temperature difference between pro...

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Abstract

The invention provides a combined mold and a manufacturing method thereof. The combined mold comprises a metal female mold and a silica gel male mold, wherein a first molding surface arranged on the metal female mold is matched with a second molding surface arranged on the silica gel male mold, and meanwhile, when in a combined molding state, between the first molding surface and the second molding surface is provided with a product cavity which is used for processing products; the silica gel male mold is internally embedded with a plurality of metal embedded parts arranged in parallel, whichare used for reducing shrinkage and deformation of the silica gel male mold. According to the combined mold and the manufacturing method thereof, the metal embedded parts are arranged in the silica gel male mold to control the wall thickness of the silica gel male mold, and further control the amount of swelling and shrinkage and deformation, thus the stress of the silica gel male mold are controllable; in this way, during the extrusion and solidification of a performed piece, the performed piece can be ensured to be stressed uniformly, namely, the silica gel male mold conducts a balanced stress on the performed piece, thus avoiding cracking and flaking of the silica gel male mold so as to further improve the service life of the silica gel male mold as well as expanding the use scope of the silica gel male mold.

Description

technical field [0001] The invention relates to the technical field of molds, in particular to a composite mold and a manufacturing method thereof. Background technique [0002] The molding process of carbon fiber composite materials generally uses metal female and male molds. For small-sized products, there is a characteristic structure with a small draft angle at the same time. The metal mold needs to design a slider to achieve demoulding. The mold design and processing costs are high. The cleaning and assembly of the mold in the non-automatic production process takes a long time, and the production efficiency is low. Low. [0003] When silicone is used as a male mold for compression molding, the silicone material is relatively soft. If the expansion rate is not controlled and the silicone mold is not strengthened, the edge of the silicone mold will crack and peel off after repeated expansion and pressure. Phenomenon, so the service life of silica gel as the positive mol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/46B29C33/40B29C33/12
CPCB29C70/46B29C33/405B29C33/12
Inventor 王克坚邸娥梅熊飞
Owner 苏州华特时代碳纤维有限公司
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