CN104057624B - A kind of preparation method of car duct - Google Patents
A kind of preparation method of car duct Download PDFInfo
- Publication number
- CN104057624B CN104057624B CN201410277849.3A CN201410277849A CN104057624B CN 104057624 B CN104057624 B CN 104057624B CN 201410277849 A CN201410277849 A CN 201410277849A CN 104057624 B CN104057624 B CN 104057624B
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- leather
- mould
- lower mold
- preparation
- mold
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
- B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3403—Foaming under special conditions, e.g. in sub-atmospheric pressure, in or on a liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
- B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
Abstract
The preparation method that the present invention provides a kind of car duct, including the upper and lower mould opening mould, and is heated to mould, cleans；Coating polishing: thermometric: open vacuum pump and the inner surface of lower mold is bled, leather is laid on the inner surface of lower mold simultaneously；Formation vacuum is sealed with between tape surrounding and lower mold leather；The glass mat identical with leather size fixing on upper mould inner surface is laid；From the leather upper hard polyurethane foam material being positioned in the middle of lower mold, then carry out toward the two ends of lower mold pouring into a mould, matched moulds；Open mold after 15-21min, close vacuum pump, lower mold, after opening tape, take out foaming air channel.The preparation technology of the present invention is simple, operation is few, and production efficiency is high, and the whole production time of every product is 30 ± 3min, and the production time before relatively reduces about 70%, weight reduction 62.5%, and reduces production cost.
Description
Technical field
The present invention relates to automobile technical field, the preparation method being specifically related to a kind of car duct.
Background technology
Car duct is the important component part of air conditioner ventilating system, the material in air channel, the shape of cross section, the technique in air channel and the requirement etc. of sealing property all directly affects the air-out effect of air outlet and the effect of defrosting-defogging, thus also just have impact on the comfort level of human body.If air channel is bad, even if the function of the regulating and controlling temperature of air-conditioning is good does not more also play effect, sometimes also can have a negative impact.
At present, it is commonly known that the air channel of passenger vehicle/bus is typically all the special-shaped pipeline being composited by multiple material.The base material in air channel adopts FRP material mostly, then makes coated with leather on its surface.The many employings of its preparation method manually paste, namely a kind of can on the mould of evacuation first paving cover leather after evacuation, unsaturated-resin it is coated with again on the back side of leather, then glass mat is laid, it is coated with unsaturated-resin, re-lays glass mat, such repetitive coatings unsaturated-resin and lay glass mat four times, laying time 40 ± 4min, on mould, hardening time is 60 ± 2min.The product density so produced is 1.6X103Kg/m3, cause the preponderance in air channel, and FRP material can not be recycled, cause waste with not environmentally；It addition, the mode of operation production efficiency of this repetitive coatings is low, often produce a needs 100 ± 5min.
Summary of the invention
The preparation method that it is an object of the invention to provide a kind of car duct, make the car duct for preparing not only lightweight, environmental protection is high, moreover it is possible to improve production efficiency.
Technical scheme is as follows: the preparation method of a kind of car duct, comprises the following steps:
(1) open the upper and lower mould of mould, and be heated to mould, clean；
(2) coating polishing: brush releasing agent at the inner surface of upper mould, is then being coated with the top mold surface method uniform grinding turn-taked of releasing agent；
(3) thermometric: stop heating after the temperature of upper and lower mould inner surface reaches 28 DEG C-30 DEG C；
(4) open vacuum pump the inner surface of lower mold is bled, being just from one end to the other side slowly pulled to uniformly facing to the inner surface of lower mold of leather is laid on the inner surface of lower mold completely simultaneously, and makes to fit completely between them；
(5) seal with between tape surrounding and lower mold leather, make formation vacuum between leather and bottom mold surface by vacuum pump；
(6) glass mat identical with leather size on upper mould inner surface is laid, and its surrounding is screwed on upper mould；
(7) from the leather upper hard polyurethane foam material being positioned in the middle of lower mold, then carry out toward the two ends of lower mold pouring into a mould, matched moulds；
(8) open mold after 15-21min, close vacuum pump, lower mold, after opening tape, take out foaming air channel.
Further, in described step (1), upper mould is multistage composition, and counterdie is an overall structure.
Further, described step (2) coating polishing adopts segmentation to brush, polishing carries out.
Further, the vacuum of described step (4) intermediate pump is not less than-0.06MPa；Leather is PVC leather, and its thickness is 1-1.4mm.
Further, in described step (5), the surrounding of leather is to be sealed against on the inner surface of lower mold by tape, the edge 18-22mm of the periphery distance lower mold of leather.
Further, described step (7) hard polyurethane foam material is to be made up of isocyanates and polyether polyol 1:1 in mass ratio, and the material temperature of hard polyurethane foam material is 25 ± 2 DEG C.
The present invention by leather upper hard polyurethane foam material, be covered with glass mat matched moulds again and foam, hard polyurethane foam material penetrates in glass mat, and molding prepares car duct.The preparation technology in its air channel is simple, operation is few, thus improve production efficiency, the whole production time of every product is 30 ± 3min, and the production time before relatively reduces about 70%, and reduces production cost.
Beneficial effects of the present invention has:
1, the present invention adopts mould in stagewise, in the middle of counterdie after one section of hard polyurethane foam material of cast, can be closed by the upper mould of this section rapidly, then carry out toward two ends pouring into a mould matched moulds more again；It is possible not only to the saving time, and need not add the cream time delaying catalyst to extend foamed material.
2, the present invention adopts hard polyurethane foam material to carry out producing air channel as foamed material, and it can be recycled, and solves environmental issue；And the density of hard polyaminoester foams is 0.6X103Kg/m3So that the weight reduction 62.5% of final products.
3, upper mould inner surface brush releasing agent, in order to avoid when die sinking can not die sinking so that use brute force just can open mould, What is more because not opening mould and mold damage.
4, the temperature of upper and lower mould inner surface is 28 DEG C-30 DEG C and uniformly, improves the quality in air channel, and because hard polyurethane foam is when mold temperature is high, expansion rate is very fast, sometimes has little time matched moulds, just foamed；And temperature is too low, expansion rate is relatively slow, affects productive temp, increases production cost.
5, the vacuum pressure of vacuum pump is not less than-0.06MPa, and otherwise leather cannot be adsorbed onto die surface, and product surface there will be the quality problems such as cavity, bulge.
6, when lay leather, leather must be fitted with die surface, and to smooth out, and the product surface otherwise produced there will be the mass defects such as surface irregularity, cavity, gauffer.
7, glass fibre knitting felt is fixed on upper mould can solve pouring foaming material after re-lay glass fibre knitting felt and time of producing, the burn close time of this time effects foaming, the mass defects such as product cavity can be caused.
8, the present invention adopts in stagewise mould and pours into a mould from the middle to both ends, is all for reducing burn close time, because burn close time is long, can cause that product has cavity, the mass defects such as hardness is not enough.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further illustrated.
Embodiment 1
The preparation method of a kind of car duct, comprises the following steps:
(1) open the upper and lower mould of mould, and be heated to mould, clean；Wherein going up mould is multistage composition, and counterdie is an overall structure；Upper mould can try totally with the clean cloth wiping without hair, counterdie pneumatic blowing rifle carries out cleaning foreign material along one end to the other end；
(2) coating polishing: the inner surface at upper mould first brushes the distance of releasing agent one section of 200mm length of 8# wax, is being coated with the top mold surface method uniform grinding turn-taked of releasing agent；Then brush successively, polishing stagewise carries out again；
(3) thermometric: use hand-held digital display infrared temperature measurement gun, respectively at every section of the upper and lower mould multiple point of uniform measurement, stops heating after the temperature of upper and lower mould inner surface reaches 28 DEG C；
(4) open the vacuum pump that vacuum is-0.06MPa the inner surface of lower mold is bled, just from one end to the other side slowly being pulled to uniformly facing to the inner surface of lower mold of PVC leather that thickness is 1mm is laid on the inner surface of lower mold completely simultaneously, and makes to fit completely between them；
(5) with tape, the surrounding of leather is sealed on the inner surface of lower mold, the edge 18mm of the periphery distance lower mold of leather, make formation vacuum between leather and bottom mold surface by vacuum pump；
(6) glass mat identical with leather size on upper mould inner surface is laid, and its surrounding is screwed on upper mould；
(7) the hard polyurethane foam material being made up of isocyanates and polyether polyol 1:1 in mass ratio from the leather upper being positioned in the middle of lower mold, its temperature is 23 DEG C, then carry out toward the two ends of lower mold pouring into a mould, matched moulds；
(8) open mold after 15min, close vacuum pump, lower mold, after opening tape, take out foaming air channel.
Embodiment 2:
The preparation method of a kind of car duct, comprises the following steps:
(1) open the upper and lower mould of mould, and be heated to mould, clean；Wherein going up mould is multistage composition, and counterdie is an overall structure；Upper mould can try totally with the clean cloth wiping without hair, counterdie pneumatic blowing rifle carries out cleaning foreign material along one end to the other end；
(2) coating polishing: the inner surface at upper mould first brushes the distance of releasing agent one section of 200mm length of 8# wax, is being coated with the top mold surface method uniform grinding turn-taked of releasing agent；Then brush successively, polishing stagewise carries out again；
(3) thermometric: use hand-held digital display infrared temperature measurement gun, respectively at every section of the upper and lower mould multiple point of uniform measurement, stops heating after the temperature of upper and lower mould inner surface reaches 30 DEG C；
(4) open the vacuum pump that vacuum is-0.1MPa the inner surface of lower mold is bled, just from one end to the other side slowly being pulled to uniformly facing to the inner surface of lower mold of PVC leather that thickness is 1-1.4mm is laid on the inner surface of lower mold completely simultaneously, and makes to fit completely between them；
(5) with tape, the surrounding of leather is sealed on the inner surface of lower mold, the edge 22mm of the periphery distance lower mold of leather, make formation vacuum between leather and bottom mold surface by vacuum pump；
(6) glass mat identical with leather size on upper mould inner surface is laid, and its surrounding is screwed on upper mould；
(7) the hard polyurethane foam material being made up of isocyanates and polyether polyol 1:1 in mass ratio from the leather upper being positioned in the middle of lower mold, its temperature is 27 DEG C, then carry out toward the two ends of lower mold pouring into a mould, matched moulds；
(8) open mold after 21min, close vacuum pump, lower mold, after opening tape, take out foaming air channel.
Above example is not limited only to protection scope of the present invention, all modify based on the basic thought of the present invention or change broadly fall into protection scope of the present invention.
Claims (6)
1. the preparation method of a car duct, it is characterised in that: comprise the following steps:
(1) open the upper and lower mould of mould, and be heated to mould, clean；
(2) coating polishing: brush releasing agent at the inner surface of upper mould, is then being coated with the top mold surface method uniform grinding turn-taked of releasing agent；
(3) thermometric: stop heating after the temperature making upper and lower mould inner surface reaches 28 DEG C-30 DEG C；
(4) open vacuum to be not less than the-0.06MPa vacuum pump inner surface to lower mold and bleed, just from one end to the other side slowly being pulled to uniformly facing to the inner surface of lower mold of leather is laid on the inner surface of lower mold completely simultaneously, and makes to fit completely between them；
(5) seal with between tape surrounding and lower mold leather, make formation vacuum between leather and bottom mold surface by vacuum pump；
(6) glass mat identical with leather size on upper mould inner surface is laid, and its surrounding is screwed on upper mould；
(7) from the leather upper hard polyurethane foam material being positioned in the middle of lower mold, then carry out toward the two ends of lower mold pouring into a mould, matched moulds；Described hard polyurethane foam material is to be made up of isocyanates and polyether polyol 1:1 in mass ratio；
(8) open mold after 15-21min, close vacuum pump, lower mold, after opening tape, take out foaming air channel.
2. the preparation method of a kind of car duct according to claim 1, it is characterised in that: in described step (1), upper mould is multistage composition, and counterdie is an overall structure.
3. the preparation method of a kind of car duct according to claim 1, it is characterised in that: described step (2) coating polishing adopts segmentation to brush, polishing carries out.
4. the preparation method of a kind of car duct according to claim 1, it is characterised in that: in described step (4), leather is PVC leather, and its thickness is 1-1.4mm.
5. the preparation method of a kind of car duct according to claim 1, it is characterised in that: in described step (5), the surrounding of leather is to be sealed against on the inner surface of lower mold by tape, the edge 18-22mm of the periphery distance lower mold of leather.
6. the preparation method of a kind of car duct according to claim 1, it is characterised in that: the material temperature of described hard polyurethane foam material is 25 ± 2 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410277849.3A CN104057624B (en) | 2014-06-20 | 2014-06-20 | A kind of preparation method of car duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410277849.3A CN104057624B (en) | 2014-06-20 | 2014-06-20 | A kind of preparation method of car duct |
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| Publication Number | Publication Date |
|---|---|
| CN104057624A CN104057624A (en) | 2014-09-24 |
| CN104057624B true CN104057624B (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410277849.3A Active CN104057624B (en) | 2014-06-20 | 2014-06-20 | A kind of preparation method of car duct |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106808671A (en) * | 2017-03-02 | 2017-06-09 | 浙江峻和橡胶科技有限公司 | One kind blowing foaming air channel technique and its process equipment |
| CN107089045A (en) * | 2017-06-27 | 2017-08-25 | 湖南亚太实业有限公司 | A kind of polyurethane closed-cell foam product and its manufacture craft |
| CN108790682B (en) * | 2018-05-23 | 2023-08-25 | 中国第一汽车股份有限公司 | Foaming material automobile air duct and processing method thereof |
| CN109571987B (en) * | 2018-11-09 | 2020-10-02 | 盐城市华悦汽车部件有限公司 | Preparation method of automobile air duct |
| CN113370556A (en) * | 2021-06-10 | 2021-09-10 | 威驰腾(福建)汽车有限公司 | Vacuum forming coating method |
| CN114425895A (en) * | 2022-01-12 | 2022-05-03 | 中国第一汽车股份有限公司 | Environment-friendly composite micro-foaming air duct and production process thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3787047T2 (en) * | 1986-04-25 | 1993-12-09 | Inoue Mtp Kk | Interior materials for vehicles and process for its manufacture. |
| JPS63239013A (en) * | 1987-02-05 | 1988-10-05 | Toyota Motor Corp | Method for integral foam molding |
| JPH05305631A (en) * | 1991-04-05 | 1993-11-19 | Sutaaraito Kogyo Kk | Manufacture of interior automotive trim |
| JPH06297502A (en) * | 1993-04-19 | 1994-10-25 | Toyo Tire & Rubber Co Ltd | Integrally foam molded form of shock absorbing material and its production |
| JP2000280272A (en) * | 1999-03-30 | 2000-10-10 | Hamani Kasei Kk | Foamed resin product and its molding method |
| CN100429074C (en) * | 2004-07-08 | 2008-10-29 | 郭学忠 | Shaping manufacturing method of automobile air flue plate and internal ceiling, ceiling plate |
| CN100443281C (en) * | 2006-07-13 | 2008-12-17 | 董升顺 | Auto air duct plate open-type foaming device and its air duct plate production method |
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