CN103538448A

CN103538448A - Windshield glass manufacturing method

Info

Publication number: CN103538448A
Application number: CN201310540770.0A
Authority: CN
Inventors: 颜悦; 姜良宝; 郭新涛; 厉蕾; 李晓宇
Original assignee: BEIJING INSTITUTE OF AERONAUTICAL MATERIALS CHINA AVIATION INDUSTRY GROUP Corp
Current assignee: Beijing Aviation Materials Research Institute Co ltd
Priority date: 2013-11-05
Filing date: 2013-11-05
Publication date: 2014-01-29
Anticipated expiration: 2033-11-05
Also published as: CN103538448B

Abstract

The invention relates to a windshield glass manufacturing technology, in particular to a light and high-crashworthiness windshield glass manufacturing method. The method adopts a one-piece injection molding process to manufacture a polycarbonate bearing layer with a bolt hole connecting structure. The crashworthiness and the manufacturing efficiency of windshield glass are improved. The method uses the injection-molded polycarbonate as the bearing layer, the windshield glass is connected onto a car body framework in a bolt connecting mode, and a bolt connection hole in the polycarbonate and the bearing layer are subjected to one-piece injection molding. The windshield glass is light, high in crashworthiness, simple in structure and reliable in connection, and the manufacturing efficiency of the windshield glass is also improved greatly. A 1.8Kg flying bird cannot crash the bearing layer at the 500Km/h speed, and no debris drops. A 1Kg aluminum bullet impacts the windshield glass at the 600Km/h speed and cannot penetrate the bearing layer, and no bearing layer debris drops.

Description

A kind of manufacture method of windshield

Technical field

The present invention relates to the manufacturing technology of windshield, relate to the manufacture method of the windshield of a kind of lightweight, high crashworthiness.

Background technology

Windshield is not only wanted to bear structural load and the impact under various states as a part for vehicle body, also will be for chaufeur provides visual field and good optical visual effect clearly, also to there is the excellent performances such as anti-icing demist, rainwater-proof, electromagnetic screening are good simultaneously.The Shanghai Maglev operation demonstration line highest running speed 430Km/h that starts trail run on December 31st, 2002, the highest debugging speed per hour reaches 501Km.On December 2nd, 2003, the manned operation world's record of train of speed per hour 580Km was created in Ribenshanli County in the manned commissioning test of magnetic suspension train carrying out.Along with scientific and technical develop rapidly, the speed of train can be more and more faster, and this has brought huge challenge also to the manufacturing technology of windshield.On the one hand, need the crashworthiness level of windshield more and more higher, for the magnetic-levitation train front screen of maximum speed 500Km/h, need to consider that foreign matter clashes into relative velocity 600km/h.According to UIC Standards UIC651, adopt 1kg standard aluminium bomb, with 600km/h, carry out impact test, require forms not penetrated.Require on the other hand windshield to meet on the basis of structure function weight light as much as possible.Existing train windscreen glass is generally closed and is formed by multilayer tempering glassy layer, and adopts clamp structure to be connected with body framwork.This connection mode is owing to supporting that rigidity is large, when bird body bump stroke acts on underwork and continues to push frame forward, there is less resilience in frame clamp structure, and there is stress concentration phenomenon, thereby the anti-bird that greatly reduces windshield is hit level, is equally also unfavorable for the loss of weight of train.

Summary of the invention

The manufacture method that the object of this invention is to provide a kind of windshield.Adopt the train windscreen glass lightweight that the method produces, high crashworthiness, simple in structure, be connected reliably with body framwork.

The present invention is by the following technical solutions: (1) adopts injection molding forming method to produce the bearing layer of windshield; First, polycarbonate pellet is laid in air dry oven, pellet laying thickness is 10～15mm, dry 4～8h at 120 ℃; Then, polycarbonate is carried out to injection mo(u)lding, during injection mo(u)lding, melt temperature is 250-350 ℃, forming mould temperature is 50-120 ℃, and injection pressure is 50-150MPa, and hardening time is 10-60s, injection speed is 100-150mm/s, dwell pressure 50-70MPa, dwell time 10-60s, has prepared the bearing layer of windshield; (2) to being coated with the electro heat chemically reinforced glass of ITO film, cut edging; The thick polyurethane interlayer of electro heat chemically reinforced glass surface layer, 2-6mm that 1.5-4mm by cutting after edging is thick and the polycarbonate bearing layer of injection mo(u)lding carry out ultrasonic cleaning, use afterwards absorbent cotton to dip in its surface of ligroin wiping of 95%, dry for standby; (3) between bearing layer and surface layer, place interlayer, between interlayer and surface layer, place copper electrode, temperature sensor and wire, be assembled into windshield original paper; Then, windshield original paper being put into autoclave, is 80-180 ℃ in temperature, pressurize 30-120min under the condition that pressure is 1-3MPa, and hot pressing is laminated is windshield.

The thickness of described windshield is no more than 22mm.

The surrounding single injection-molded of described bearing layer goes out hold-down bolt hole.

Invention effect of the present invention is: the present invention adopts integral molded plastic technique to produce the polycarbonate bearing layer of strap bolt hole connection structure.Improved the crashworthiness level of windshield and manufactured efficiency.

It is bearing layer that the present invention selects injection mo(u)lding polycarbonate, and mode with bolts is connected to windshield on body framwork, and bolt connecting hole and bearing layer on polycarbonate is integral molded plastic moulding.This windshield is lightweight, high crashworthiness not only, and simple in structure, connect reliably, it is manufactured efficiency and also greatly improves.It is not cracked with 500Km/h shock bearing layer that crashworthiness level reaches 1.8Kg flying bird, without fragment, comes off.1Kg aluminium bomb impacts and does not penetrate bearing layer with 600Km/h.Speed strikes on windshield, and aluminium bomb does not penetrate bearing layer, and without fragment, comes off on bearing layer.

Accompanying drawing explanation

Fig. 1 is windshield structural representation lateral plan of the present invention;

Fig. 2 is windshield structural representation birds-eye view of the present invention.

The specific embodiment

Below in conjunction with drawings and Examples, the present invention is described in detail.

(1) adopt injection molding forming method to produce the bearing layer 4 of windshield: first, polycarbonate pellet is laid in air dry oven, pellet laying thickness is 10～15mm, dry 4～8h at 120 ℃; Then, polycarbonate is carried out to injection mo(u)lding, during injection mo(u)lding, melt temperature is 250-350 ℃, forming mould temperature is 50-120 ℃, and injection pressure is 50-150MPa, and hardening time is 10-60s, injection speed is 100-150mm/s, dwell pressure 50-70MPa, dwell time 10-60s, has prepared the bearing layer of windshield.Die injection moulding comprises the first mould and the second mould matching with the first mould, after injection mo(u)lding finishes, opens mould, ejects goods; (2) to being coated with the electro heat chemically reinforced glass 1 of ITO film, cut edging; The thick polyurethane interlayer 3 of electro heat chemically reinforced glass surface layer, 2-6mm that 1.5-4mm by cutting after edging is thick and the polycarbonate bearing layer of injection mo(u)lding carry out ultrasonic cleaning, use afterwards absorbent cotton to dip in its surface of ligroin wiping of 95%, dry for standby; (3) between bearing layer and surface layer, place interlayer, between interlayer and surface layer, place copper electrode 5, temperature sensor 6 and wire, be assembled into windshield original paper; Then, windshield original paper being put into autoclave, is 80-180 ℃ in temperature, pressurize 30-120min under the condition that pressure is 1-3MPa, and hot pressing is laminated is windshield.After the laminated end of hot pressing, along surface layer glass edge, unnecessary polyurethane pellicle is cut away, and equably with sealant by exposed interlayer and the chemical enhanced unorganic glass edges cover of electro heat outside.

Embodiment mono-

First PC pellet is put into air dry oven, pellet laying thickness is 15mm, dry 8h at 120 ℃; Then windshield polycarbonate bearing layer is carried out to injection mo(u)lding, during injection mo(u)lding, melt temperature is 290 ℃, and mold temperature is 100 ℃, and injection pressure is 80MPa, and hardening time is 20s, and injection speed is 110mm/s, dwell pressure 65MPa, dwell time 30s.The polycarbonate bearing layer of the chemical enhanced unorganic glass surface layer of electro heat, the thick polyurethane interlayer of 4mm and injection mo(u)lding that 2.2mm by cutting after edging is thick carries out ultrasonic cleaning, uses afterwards absorbent cotton to dip in its surface of ligroin wiping of 95%, dry for standby.The thick polyurethane pellicle of 4mm is clipped between polycarbonate and electrically heated glass, and at assigned address electrodes, temperature sensor and wire, then putting it in autoclave is 120 ℃ in temperature, pressurize 90min under the condition that pressure is 1.6MPa.Hot pressing is laminated complete after, windshield is carried out to the test of thickness and crashworthiness, test result is as follows:

Embodiment bis-

First PC pellet is put into air dry oven, pellet laying thickness is 15mm, dry 6h at 120 ℃; Then windshield polycarbonate bearing layer is carried out to injection mo(u)lding, during injection mo(u)lding, melt temperature is 280 ℃, and mold temperature is 110 ℃, and injection pressure is 70MPa, and hardening time is 30s, and injection speed is 120mm/s, dwell pressure 60MPa, dwell time 30s.The polycarbonate bearing layer of the chemical enhanced unorganic glass surface layer of electro heat, the thick polyurethane interlayer of 4mm and injection mo(u)lding that 2.2mm by cutting after edging is thick carries out ultrasonic cleaning, uses afterwards absorbent cotton to dip in its surface of ligroin wiping of 95%, dry for standby.The thick polyurethane pellicle of 4mm is clipped between polycarbonate and electrically heated glass, and at assigned address electrodes, temperature sensor and wire, then putting it in autoclave is 120 ℃ in temperature, pressurize 90min under the condition that pressure is 1.6MPa.Hot pressing is laminated complete after, windshield is carried out to the test of thickness and crashworthiness, test result is as follows:

Claims

1. a manufacture method for windshield, is characterized in that,

(1) adopt injection molding forming method to produce the bearing layer of windshield: first, polycarbonate pellet is laid in air dry oven, pellet laying thickness is 10～15mm, dry 4～8h at 120 ℃; Then, polycarbonate is carried out to injection mo(u)lding, during injection mo(u)lding, melt temperature is 250-350 ℃, forming mould temperature is 50-120 ℃, and injection pressure is 50-150MPa, and hardening time is 10-60s, injection speed is 100-150mm/s, dwell pressure 50-70MPa, dwell time 10-60s, has prepared the bearing layer of windshield;

(2) to being coated with the electro heat chemically reinforced glass of ITO film, cut edging; The thick polyurethane interlayer of electro heat chemically reinforced glass surface layer, 2-6mm that 1.5-4mm by cutting after edging is thick and the polycarbonate bearing layer of injection mo(u)lding carry out ultrasonic cleaning, use afterwards absorbent cotton to dip in its surface of ligroin wiping of 95%, dry for standby;

(3) between bearing layer and surface layer, place interlayer, between interlayer and surface layer, place copper electrode, temperature sensor and wire, be assembled into windshield original paper; Then, windshield original paper being put into autoclave, is 80-180 ℃ in temperature, pressurize 30-120min under the condition that pressure is 1-3MPa, and hot pressing is laminated is windshield.

2. the manufacture method of a kind of windshield as claimed in claim 1, is characterized in that, the thickness of described windshield is no more than 22mm.

3. the manufacture method of a kind of windshield as claimed in claim 1, is characterized in that, the surrounding single injection-molded of described bearing layer goes out hold-down bolt hole.

4. the manufacture method of a kind of windshield as claimed in claim 1, it is characterized in that, the preferred 250-300 ℃ of described melt temperature, the preferred 80-110 ℃ of mold temperature, the preferred 110-140MPa of injection pressure, the preferred 20-50s of hardening time, the preferred 120-140mm/s of injection speed, the preferred 60-70MPa of dwell pressure, preferred 30-50s of dwell time.