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Manufacturing method of core mold

A manufacturing method and core mold technology, applied in the field of core mold manufacturing, can solve the problems of long time-consuming dissolution process, affecting product quality, low efficiency, etc., achieving the effects of repeated use, easy handling, and simple preparation method.

Pending Publication Date: 2022-01-21
SHAANXI TIANYI ANTENNA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The combined metal mandrel is complex in connection, heavy in weight, and difficult to disassemble and assemble. After repeated use, the matching accuracy of each movable block decreases, which affects product quality; the water-soluble mandrel cannot be reused, has a large weight, and the dissolution process takes a long time and is inefficient; Ordinary airbag molds cannot be used as core molds. Although they are easy to demould, due to the low rigidity of the mold, the surface quality of the inner cavity of the product cannot meet the requirements of high-end products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method of manufacturing a mandrel, the method comprising the steps of:

[0024] Step (101): preheating the epoxy SMP at 120° C. for 30 minutes to obtain the softened mandrel raw material.

[0025] Step (102): laying the softened epoxy SMP conformally in the mold cavity. Among them, it should be noted that the interface should be in the form of docking as much as possible.

[0026] Step (103): paving the first packaging vacuum bag film layer on the softened epoxy SMP surface in the mold cavity, and laying the second packaging vacuum bag film layer outside the mold, the first packaging vacuum bag film layer and the second packaging vacuum bag film layer The film layers of the two packaging vacuum bags are sealed and connected by a sealing strip to form a closed space to obtain a packaging mold. Among them, the vacuum bag film can be cut according to the mold cavity size and external size, and the first packaging vacuum bag film layer and the second packaging vacuum ba...

Embodiment 2

[0032] A method of manufacturing a mandrel, the method comprising the steps of:

[0033] Step (201): preheating polyurethane SMP at 130° C. for 40 minutes to obtain a softened mandrel raw material.

[0034] Step (202): laying the softened polyurethane SMP conformally in the mold cavity.

[0035] Step (203): paving the first packaging vacuum bag film layer on the softened polyurethane SMP surface in the mold cavity, and laying the second packaging vacuum bag film layer outside the mold, the first packaging vacuum bag film layer and the second packaging vacuum bag film layer The film layers of the packaging vacuum bag are sealed and connected by a sealing strip to form a closed space, and a packaging mold is obtained.

[0036] Step (204): Perform hot-press vulcanization molding on the packaging mold, the hot-press temperature is 160° C., the pressure is 0.4 MPa, and the vulcanization time is 20 minutes to obtain a core mold.

[0037] Step (205): Paste an isolation film on the ...

Embodiment 3

[0039] A method of manufacturing a mandrel, the method comprising the steps of:

[0040] Step (301): Preheating the polyester SMP at 140° C. for 50 minutes to obtain a softened mandrel raw material.

[0041] Step (302): laying the softened polyester SMP conformally in the mold cavity.

[0042] Step (303): paving the first packaging vacuum bag film layer on the softened polyester SMP surface in the mold cavity, and laying the second packaging vacuum bag film layer outside the mold, the first packaging vacuum bag film layer and the second packaging vacuum bag film layer The film layers of the two packaging vacuum bags are sealed and connected by a sealing strip to form a closed space to obtain a packaging mold.

[0043] Step (304): Perform hot-press vulcanization molding on the package mold, the hot-press temperature is 170° C., the pressure is 0.5 MPa, and the vulcanization time is 30 minutes to obtain a core mold.

[0044] Step (305): Paste an isolation film on the surface o...

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Abstract

The invention discloses a manufacturing method of a core mold, and belongs to the technical field of core mold manufacturing. The method comprises the following steps: preheating a core mold raw material to obtain a softened core mold raw material; laying the softened core mold raw material in a mold cavity in a shape follow-up mode; laying a first packaging film layer on the surface of the softened core mold raw material in the mold cavity, laying a second packaging film layer outside the mold, connecting the first packaging film layer and the second packaging film layer in a sealed mode to form a closed space, and obtaining a packaging mold; and carrying out hot-pressing vulcanization forming on the packaging mold to obtain the core mold. According to the invention, the rigidity of the core mold prepared through the mold and a shape memory polymer varies along with the temperature, the rigidity is kept in laying and forming processes for a composite workpiece, the hard and smooth surface of the core mold is provided, when the environment temperature reaches a material softening temperature or above, the rigidity of the core mold is rapidly reduced, and the core mold can be conveniently pulled out of an inner cavity of the complex composite workpiece to be demolded.

Description

technical field [0001] The invention relates to the technical field of core mold manufacturing, in particular to a core mold manufacturing method. Background technique [0002] With the improvement of the performance of composite materials and the development of design and manufacturing technology, the application of composite materials in high-precision products such as aerospace, military industry and national defense has gradually changed from simple decorative parts and secondary load-bearing components to main load-bearing components and functional components. Transition, open composite parts with complex cavity structure (single opening or double opening) are difficult to prepare, especially for aviation pipelines, engine intakes, fuel storage Cans, etc., put forward higher requirements for mold technology. The current mold technologies for forming parts with complex cavity structures mainly include combined metal core molds, water-soluble core molds and airbag molds....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/38B29C33/40B29C70/30B29C70/34B29C70/54B29L31/00
CPCB29C33/3842B29C33/40B29C70/342B29C70/30B29C70/54B29L2031/757
Inventor 赵晨曦许粉靳武刚李浩张晓
Owner SHAANXI TIANYI ANTENNA