Molding method for helicopter cockpit door sliding window U-shaped guide rail

A molding method and cockpit technology, applied to household components, household appliances, and other household appliances, to achieve the effects of less processing steps, time saving, and low cost

Inactive Publication Date: 2017-11-17
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a molding method for the U-shaped guide rail of the sliding window of the helicopter cockpit door aiming at the problems existing in the injection molding method of the existing U-shaped guide rail

Method used

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  • Molding method for helicopter cockpit door sliding window U-shaped guide rail
  • Molding method for helicopter cockpit door sliding window U-shaped guide rail
  • Molding method for helicopter cockpit door sliding window U-shaped guide rail

Examples

Experimental program
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Effect test

Embodiment

[0039] Taking the formed guide rail with double curvature, variable thickness and U-shaped thin-walled structure characteristics, the guide rail is 741.15mm long, 359.98mm wide, 62.39mm high, 2.2-4.4mm thick, and the guide rail groove width is 13mm as an example.

[0040] The high-precision molding method is injection molding for one-time overall molding. Haitian 1200T injection molding machine is used. The screw diameter is 110mm. The hot runner adopts the 5-point needle valve hot runner method of YUDO company. The resin particle raw material used is The grade produced by the French Akema company is Altuglas V040 plexiglass.

[0041] During molding, the screw temperature is set according to seven stages, which are 190°C, 210°C, 235°C, 240°C, 245°C, 245°C and 240°C; The holding pressure is 55MPa, the first-order holding time is 20s, the second-order holding time is 30s, and the cooling time is 20s; The waiting time until the opening of the fifth glue point is 0s, 2.5s, 2.5s, ...

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Abstract

The invention belongs to the technical field of injection molding and relates to a molding method for a helicopter cockpit door sliding window U-shaped guide rail. Moldflow is utilized for mold flow analysis to optimize the number and distribution of glue feeding points, a multi-point sequential glue feeding manner is adopted, a guide rail weld line is eliminated, the method that a temperature difference exists between the die temperature on the moving die side and the die temperature on the fixed die side is utilized, and buckling deformation of the guide rail is controlled. The molding method relates to less machining processes, production efficiency is greatly improved, time is saved, the cost is saved, product quality is greatly improved, and the appearance size and precision of a product are guaranteed. The appearance deviation of the product is less than or equal to + / -0.1 mm, the film pasting degree is less than or equal to 0.1 mm, and the opening deviation is less than or equal to 0.4 mm. The injection molding one-time integral forming technology for a complex structural component is utilized, the U-shaped guide rail high-precision molding method is high in efficiency, low in cost and high in qualified rate, the product molded by the method has the characteristics of being high in appearance quality and high in size precision and can meet the use requirements of a whole helicopter.

Description

technical field [0001] The invention belongs to the technical field of injection molding, and relates to a molding method for a U-shaped guide rail of a sliding window of a helicopter cockpit door. Background technique [0002] Due to its light weight, high strength, corrosion resistance, and low price, plastics are widely used in the fields of sliding window guide rails in construction, ships, automobiles, aerospace, etc., to realize sliding sliding of sliding windows in the guide rails. The shape and structural characteristics of the guide rail are directly related to the forming method of the guide rail, and the selection of the forming method is directly related to the quality, cost and progress of the product. Because the U-shaped guide rail of the sliding window of the helicopter driving window has the characteristics of double curvature, the bending is not on the same plane, and has a variable thickness and irregular U-shaped structure, its processing and forming is r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/76B29C45/77B29C45/78B29L31/30
CPCB29C45/7613B29C45/77B29C45/78B29C2945/76498B29C2945/76531B29C2945/76665B29C2945/76732B29C2945/76752B29C2945/76832B29C2945/76862B29L2031/3088
Inventor 葛勇郎建林王韬厉蕾霍仲祺
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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