Clear dimension compression molding method for phenolic resin based complex profile product

A technology of phenolic resin and complex profile, which is applied in the field of phenolic resin-based molded composite material preparation, can solve the problems of high fiber content at the thin wall of the product, difficult machining, and long process, so as to improve the material rate and product quality, Good surface quality and interior quality, good surface quality effect

Inactive Publication Date: 2010-12-22
国营江北机械厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, it is very difficult to produce products by machining, and the products are easily damaged during machining, the process is long, raw materials are wasted, the cost is high and the product quality is unstable
[0003] However, if the net size product is directly molded without leaving a machine allowance, it is easy to exceed the surface quality and internal quality of the product, such as: lack of material at the change of the complex profile, loose interior of the relatively thick part of the product, and thin-walled part of the product. High fiber content, these defects will cause the product to be scrapped, so that the product qualification rate is not high

Method used

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  • Clear dimension compression molding method for phenolic resin based complex profile product
  • Clear dimension compression molding method for phenolic resin based complex profile product
  • Clear dimension compression molding method for phenolic resin based complex profile product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: A molding method of a certain type of wave-transparent product.

[0024] (1) Prepare the premix.

[0025] The conventional preparation method is adopted: the high-silica glass fiber cut-to-length yarn is immersed in the aminophenolic resin (616#), and the preparation is carried out according to the following weight ratio: high-silica glass fiber cut-to-length yarn: phenolic resin = 60: 40, repeatedly extruded Press until the impregnation is uniform, then dry, loosen, and dry to make a fibrous premix, and then cut the premix according to the required length.

[0026] (2) Preform 5 equivalent slabs.

[0027] First divide the corresponding 5 equivalent flat plates: determine the geometric dimensions of the wave-transparent product according to the requirements, and divide them into blocks, see figure 1 As shown, it is divided into 5 parts A, B, C, D, and E, and corresponds to 5 equivalent plates of A1, B1, C1, D1, and E1. It is required that A and A1, B and B1...

Embodiment 2

[0036] Example 2: A molding method of a certain type of wave-transparent insert.

[0037] (1) Prepare the premix.

[0038] Adopt conventional preparation method: impregnate high-silica glass fiber cut-to-length yarn in aminophenol-formaldehyde resin (616#), prepare according to the following weight ratio: high-silica glass fiber cut-to-length yarn: phenolic resin = 60: 40 and repeatedly extrude , until the impregnation is uniform, then dry, loosen, and dry to make a fibrous premix, and then cut the premix according to the required length.

[0039] (2) Preform 5 equivalent slabs.

[0040] First divide the corresponding 5 equivalent flat plates: determine the geometric size and block of the wave-transparent product according to the requirements, see figure 1 As shown, it is divided into 5 parts A, B, C, D, and E, and corresponds to 5 equivalent plates of A1, B1, C1, D1, and E1. It is required that A and A1, B and B1, C and C1, and D The thicknesses of D1, E, and E1 are basica...

Embodiment 3

[0045] Embodiment 3: The forming method of a certain type of protective cap.

[0046] (1) Premix preparation.

[0047]Adopt conventional preparation method: impregnate high-silica glass fiber cut-to-length yarn in aminophenol-formaldehyde resin (616#), prepare according to the following weight ratio: high-silica glass fiber cut-to-length yarn: phenolic resin = 60: 40 and repeatedly extrude , until the impregnation is uniform, then dry, loosen, and dry to make a fibrous premix, and then cut the premix according to the required length.

[0048] (2) Preform 5 equivalent slabs.

[0049] Divide the corresponding 5 equivalent plates first: determine the geometric size of the wave-transparent product according to the requirements and divide it into blocks, see figure 2 As shown, it is divided into five parts: F1, F2, F3, G, and H, and corresponds to five equivalent plates of F11, F21, F31, G1, and H1. The total thickness of F and F1+F2+F3, The thicknesses of G and G1, H and H1 ar...

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Abstract

The invention discloses a clear dimension compression molding method for a phenolic resin based complex profile product, which comprises the following steps of: firstly, preforming a plurality of equivalent flat plates, wherein each equivalent flat plate corresponds to one part of the phenolic resin based complex profile product; and then, superposing the equivalent flat plates, and matching the mold for molding to obtain the product. The method effectively improves the quality and the qualification rate of the product, reduces working procedures and material consumption, lowers cost and increases product efficiency.

Description

technical field [0001] The invention relates to the technical field of preparation of phenolic resin-based molding composite materials, in particular to a net-size molding method for phenolic resin-based products with complex profiles. Background technique [0002] Due to the high molding pressure of phenolic resin-based molding composite materials, small molecular substances are produced during the molding process. The existing phenolic resin-based molding technology obtains finished products by molding product blanks and machining, which is difficult to guarantee dimensional accuracy and surface quality. But at this stage, with the higher and higher technical requirements, the product profile is more and more complex, and the wall thickness difference is getting bigger and bigger. However, according to the traditional molding method, it is necessary to leave a large margin when molding products with complex profiles, and then obtain the finished product by machining. It i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/42B29C43/02B29C43/58
Inventor 杨恒邓德凤
Owner 国营江北机械厂
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