CN109760280A

CN109760280A - A kind of bumper production technology and formula

Info

Publication number: CN109760280A
Application number: CN201910121429.9A
Authority: CN
Inventors: 张军
Original assignee: Nantong Yi Ying Machinery Technology Co Ltd
Current assignee: Nantong Yi Ying Machinery Technology Co Ltd
Priority date: 2019-02-19
Filing date: 2019-02-19
Publication date: 2019-05-17

Abstract

The invention discloses a kind of bumper production technology and formulas, technique goes out bumper, while providing formula precentagewise by preparation-injection molding-finishing-spraying-assembly are as follows: 40-50%EPDM, 10-20%PE, 10-20%TPR, 5-10% fiber filament, 0.8-1.5% are plasticized finish, 0.5-1.3% plasticizer, 0.4-0.8% activating agent.Present invention discloses a kind of bumper production technology and formulas, pass through the bumper material of formula preparation, hardness is high, toughness is strong, does not allow the secured intensity of easy fracture, moulding high, and impact resistance epistasis can control moulding defect kind to the greatest extent, improve paint strong adsorption, it is not easy to change with fall off, bumper precision is high, and simple process is convenient, artificial participation is reduced, cost is reduced.

Description

A kind of bumper production technology and formula

Technical field

The invention belongs to stamping areas, and in particular to a kind of bumper production technology and formula.

Background technique

Bumper is the safety device for absorbing and slowing down foreign impacts power, protect vehicle body front and rear part.Many years before Automobile front/rear collision bumper be with steel plate punched at channel steel, together with longitudinal beam rivet or weld, with vehicle body have one section compared with Big gap, it appears that very unsightly；Extensive application with engineering plastics in auto industry with the development of the automobile industry, vapour Vehicle bumper has also moved towards the road of innovation as a kind of important safety device.The car front/rear collision bumper of today is in addition to keeping Outside original defencive function, the harmony with car body moulding is also pursued with uniformly, pursues the lightweight of itself.The front and back of car is protected Dangerous thick stick is all made of plastics, and people are known as plastic bumper；The plastic bumper of general automobile is by outside plate, padded coaming It is formed with crossbeam three parts.Wherein outside plate and padded coaming are made of plastic, and crossbeam is stamped to form U-lag with flat cold-rolled sheet；Outside Plate and padded coaming are attached to crossbeam.

In the prior art, the strength of materials of bumper is poor, poor toughness and is easily broken off, and previous technique master Will there is following problems: Product Precision be poor；In working hour, process is excessive, waste of manpower, and then increases production cost.

Summary of the invention

Goal of the invention: the purpose of the present invention is to solve deficiencies in the prior art, and it is raw to provide a kind of bumper Production. art and formula, solve the above problems.

A kind of technical solution: bumper production technology of the present invention, comprising the following steps:

(1) prepare: EPDM, PE, TPR, fiber filament, plasticising finish, plasticizer, activating agent be put into kneading machine and mixed, Melting temperature is controlled at 270-290 DEG C, is put into barrel and is kept the temperature after being thoroughly mixed, holding temperature is at 230-260 DEG C；

(2) it is molded: mixed material being put into precise injection machine injection molding, wherein 220-240 DEG C of hot-fluid channel temp, mold 30-35 DEG C of surface temperature, screw speed 60-80 turns/min, mixed material injection speed 30-40,25-30,20-30mm/ S, injection time 10-20sec, injection pressure 480-500,280-310,100-120bar, cooling time 30-40sec；

(3) it modifies: deburring shaping inspection being carried out to injected molded polymeric material in step 2, while removing extra overlap and burr；

(4) spray: material clean-drying-and cools down-dedusting-spraying-baking-cooling-after modifying obtained in step 3 It examines；

(5) it assembles: product qualified in step 4 is subjected to assembly, after required adjutant is installed, packaging and warehousing.

Preferably, the spraying process washing and moisture content drying in the step 4: material after being modified obtained in step 3 Surface washing is carried out, then carries out baking process again, drying temperature is controlled at 55-70 DEG C；By the product of drying using cooling Channel cooling；By combusted gas generant thermal-flame after cooling, bumper surface is handled, flame temperature 2000 ℃；Surface dirt is removed by electrostatic precipitation；Bumper after electrostatic precipitation is carried out to the spray of priming paint, finishing coat and varnish It applies；Bumper after spray painting is put into drying tunnel, temperature is 70-80 DEG C；After product baking, by cooling duct, product surface Temperature is cooled to 25 DEG C；Appearance test is carried out to it respectively according to the product standard of different product, removes substandard product.

Preferably, the bumper material formula precentagewise are as follows: 40-50%EPDM, 10-20%PE, 10-20%TPR, 5- 10% fiber filament, 0.8-1.5% are plasticized finish, 0.5-1.3% plasticizer, 0.4-0.8% activating agent.

The utility model has the advantages that bumper material of the present invention by formula preparation, hardness is high, toughness is strong, does not allow easy fracture, injection molding The secured intensity of part is high, and impact resistance epistasis can control moulding defect kind to the greatest extent, improves paint strong adsorption, is not easy Change colour and fall off, bumper precision is high, and simple process is convenient, reduces artificial participation, reduces cost.

Specific embodiment

A kind of bumper production technology, comprising the following steps:

In this example, spraying process washing and moisture content drying in the step 4: material after being modified obtained in step 3 Material carries out surface washing, then carries out baking process again, and drying temperature is controlled at 55-70 DEG C；By the product of drying using cold But channel cools down；By combusted gas generant thermal-flame after cooling, bumper surface is handled, flame temperature is 2000℃；Surface dirt is removed by electrostatic precipitation；Bumper after electrostatic precipitation is subjected to priming paint, finishing coat and varnish Spraying；Bumper after spray painting is put into drying tunnel, temperature is 70-80 DEG C；After product baking, by cooling duct, product table Face temperature is cooled to 25 DEG C；Appearance test is carried out to it respectively according to the product standard of different product, removes substandard product.

In this example, the bumper material formula precentagewise are as follows: 40-50%EPDM, 10-20%PE, 10-20%TPR, 5-10% fiber filament, 0.8-1.5% are plasticized finish, 0.5-1.3% plasticizer, 0.4-0.8% activating agent.

The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification For the equivalent embodiment of equivalent variations, but anything that does not depart from the technical scheme of the invention content, according to the technical essence of the invention Any simple modification, equivalent change and modification to the above embodiments, all of which are still within the scope of the technical scheme of the invention.

Claims

1. a kind of bumper production technology, it is characterised in that: the following steps are included:

2. a kind of bumper production technology according to claim 1, it is characterised in that: the spraying in the step 4 Technique washing and moisture content drying: material carries out surface washing after modifying obtained in step 3, then carries out baking process again, Drying temperature is controlled at 55-70 DEG C；The product of drying is cooled down using cooling duct；By combusted gas generant after cooling Thermal-flame handles bumper surface, and flame temperature is 2000 DEG C；Surface dirt is removed by electrostatic precipitation；It will be through Bumper after crossing electrostatic precipitation carries out the spraying of priming paint, finishing coat and varnish；Bumper after spray painting is put into drying tunnel, temperature is 70-80℃；After product baking, by cooling duct, product surface temperature is cooled to 25 DEG C；According to the product mark of different product Standard carries out appearance test to it respectively, removes substandard product.

3. a kind of bumper formula, it is characterised in that: the bumper material formula precentagewise are as follows: 40-50%EPDM, 10-20%PE, 10-20%TPR, 5-10% fiber filament, 0.8-1.5% plasticising finish, 0.5-1.3% plasticizer, 0.4-0.8% activity Agent.