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Manufacture method of helicopter cabin cover windshield positioning pad

A manufacturing method and positioning pad technology, which is applied to aircraft accessories and other directions, can solve problems such as large differences in expansion coefficients, cracks in windshield glass, and high hardness of nylon, so as to ensure flight safety and avoid cracks

Inactive Publication Date: 2015-05-27
HARBIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high hardness of nylon, the expansion coefficient of HF256 sealant used for bonding glass is quite different. When the ambient temperature changes sharply, the internal stress generated will easily cause cracks in the windshield, which will cause safety hazards.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Manufacture of ZX windshield positioning pad.

[0019] 1. Manufacture film mold: adopt an open rectangular metal die, the depth of the cavity is equal to the thickness of the positioning pad, and the area of ​​the cavity is about the sum of the area of ​​20 positioning pads;

[0020] 2. Manufacture film: first, spread polyethylene film on the inner surface of the mold cavity, the thickness of the film is 0.15mm; then pour HF256 sealant into the cavity to fill the cavity with a scraper, scrape it flat with a scraper, and seal it The surface of the glue is covered with a layer of polyethylene film, and it is flattened with a rubber roller;

[0021] 3. Drying: After the mold is parked at room temperature for 48 hours, the mold is demoulded, and the film is taken out;

[0022] 4. Punching: use manual punching die to punch the film into positioning pad;

[0023] 5. Drying: Park the punched positioning pad at room temperature for 312 hours.

Embodiment 2

[0024] Embodiment 2: Manufacture of windshield glass positioning pad of HXXX type machine.

[0025] 1. Manufacture film mold: adopt an open rectangular metal die, the depth of the cavity is equal to the thickness of the positioning pad, and the area of ​​the cavity is about the sum of the area of ​​25 positioning pads;

[0026] 2. Manufacture film: First, spread polyethylene film on the inner surface of the mold cavity, the thickness of the film is 0.18mm; then pour HF256 sealant into the cavity to fill the cavity with a scraper, scrape it flat with a scraper, and seal it The surface of the glue is covered with a layer of polyethylene film, and it is flattened with a rubber roller;

[0027] 3. Drying: Park the mold at room temperature for 50 hours, demould, and take out the film;

[0028] 4. Punching: use manual punching die to punch the film into positioning pad;

[0029] .5. Drying: Park the punched positioning pad at room temperature for 320 hours.

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PUM

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Abstract

The invention belongs to the technology of resin moulding, and relates to a manufacture method of helicopter cabin cover windshield positioning pad. The manufacture steps of the positioning pad are as follows: manufacturing film, air drying, punching out and drying. The invention provides a manufacture method of the helicopter cabin cover windshield positioning pad, thereby the crack generated on the windshield when the temperature changes violently is avoided and flight safety is guaranteed.

Description

technical field [0001] The invention belongs to resin molding technology, and relates to a method for manufacturing a windshield glass positioning pad of a helicopter cockpit cover. Background technique [0002] A certain type of helicopter canopy windshield has been supported and positioned by machine-added nylon pads. Due to the high hardness of nylon, the expansion coefficient of the HF256 sealant used for bonding glass is quite different. When the ambient temperature changes sharply, the internal stress generated will easily cause cracks in the windshield, forming a safety hazard. Contents of the invention [0003] The object of the present invention is to propose a method for manufacturing the windshield glass positioning pad of a helicopter cockpit cover, so as to avoid cracks in the windshield glass when the temperature changes sharply and ensure flight safety. [0004] The technical solution of the present invention is: the manufacture method of helicopter cockpit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C1/14
Inventor 毛英坤张朵姜春玉于四龙高玉娥陈艳梅李晖万杰
Owner HARBIN