CN110509644A - A kind of preparation method for the carpet that foams - Google Patents
A kind of preparation method for the carpet that foams Download PDFInfo
- Publication number
- CN110509644A CN110509644A CN201910753641.7A CN201910753641A CN110509644A CN 110509644 A CN110509644 A CN 110509644A CN 201910753641 A CN201910753641 A CN 201910753641A CN 110509644 A CN110509644 A CN 110509644A
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- Prior art keywords
- foaming
- carpet
- preparation
- layer
- die
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/08—Interconnection of layers by mechanical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N3/00—Arrangements or adaptations of other passenger fittings, not otherwise provided for
- B60N3/04—Arrangements or adaptations of other passenger fittings, not otherwise provided for of floor mats or carpets
- B60N3/048—Arrangements or adaptations of other passenger fittings, not otherwise provided for of floor mats or carpets characterised by their structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0253—Polyolefin fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0276—Polyester fibres
- B32B2262/0284—Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/0278—Polyurethane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2605/00—Vehicles
- B32B2605/003—Interior finishings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Carpets (AREA)
Abstract
The present invention relates to carpet making process technical fields, more particularly to a kind of preparation method of carpet that foams.The preparation method of foaming carpet (6) includes: S1: foamed material is injected into the foaming mould according to the shape design of the foaming layer (4) of foaming carpet (6), foaming is carried out, to obtain molding foaming layer (4)；S2: the foaming layer (4) and carpet body (5) stacking are placed in die cutting die, compression molding and cutting process are carried out, to obtain the molding foaming carpet (6).The preparation method of the foaming carpet is pressed and molded after handling by using first foaming, enable the independent foaming of foaming layer, improve the final product quality of foaming layer, reduce the risk that foaming layer has production defect, by the way that carpet body and qualified foaming layer are pressed and molded, the yield rate for improving foaming carpet, reduces production cost.
Description
Technical field
The present invention relates to carpet making process technical fields, more particularly to a kind of preparation method of carpet that foams.
Background technique
With the improvement of the quality of life, passenger requires automobile interior decoration higher and higher.Wherein, car carpeting as one compared with
For important inside gadget, the feature of environmental protection, NVH and the comfort of vehicle are directly influenced, people is received and greatly payes attention to.
In view of the cost performance of production, car carpeting is frequently with flowering structure at present: the tufting being sequentially stacked from top to bottom
Blanket+glue+re-coating layer EVA+PU foaming layer multi-layer compound structure, the construction car carpet comfort and sound insulation value are good, but at
This is higher, and is often first pressed and molded carries out PU foaming again in process of production, and the foaming mould of early investment is caused
Have larger (usually event carpet), and easily occurs if defective on the coating of carpet fabric backing layer when later period foaming
The unqualified situation such as material thoroughly, causes one integral piece carpet to be scrapped, causes the problems such as at high cost, yield rate is low.
Summary of the invention
The purpose of the invention is to overcome it is of the existing technology because car carpeting by be first pressed and molded again into
Row PU foaming production technology and caused by it is at high cost, yield rate is low the problems such as, provide it is a kind of foam carpet preparation method, should
The preparation method of foaming carpet improves yield rate, reduces costs by using being pressed and molded after first foaming processing.
To achieve the goals above, one aspect of the present invention provides a kind of preparation method of carpet that foams, the foaming carpet
Preparation method include:
S1: foamed material is injected into the foaming mould of the shape design of the foaming layer according to the foaming carpet, is carried out
Foaming, to obtain molding foaming layer；
S2: the foaming layer and carpet body stacking being placed in die cutting die, compression molding and cutting process are carried out, with
Obtain the molding foaming carpet.
Optionally, before the carpet body is put into the die cutting die, first heated the carpet body
Processing.
Optionally, the heating temperature setting of the heat treatment are as follows: 190 ° -210 °.
Optionally, in step s 2, the carpet body is set as planar structure.
Optionally, in step s 2, the carpet body is transferred in the die cutting die by chain transmitting device.
Optionally, the die cutting die includes the upper mold of adaptation and lower mold, step S2 include:
S21, first the foaming layer is placed in the lower mold, the carpet body is then placed on the foaming layer
On；
S22, the upper mold is driven to move down, until with the position of the lower mold cooperation.
Optionally, the die cutting die includes cutting member, and the cutting member is slidably attached at the upper mold, institute
It states cutting member to be configured to move down carry out cutting process along the lateral surface of the lower mold, wherein step S2 includes:
S23, when the upper mold moves to the position with the lower mold cooperation, move down the cutting member, will
The carpet body is cut along the outer boundary that the upper mold and lower mold cooperate, to obtain the molding foaming ground
Blanket.
Optionally, the carpet body is set as being sequentially stacked raising needle punched carpet fabric, polyethylene film from the top down
With the multi-layer compound structure of felt.
Optionally, the foaming mould includes the upper foaming mould and lower foaming mould of adaptation, and the upper foaming mould includes being used for
Accommodate the feeding inlet of foaming machine gun head, wherein step S1 includes: first to mold the upper foaming mould and lower foaming mould with shape
At accommodating chamber, then the foamed material is injected into the accommodating chamber by the foaming machine gun head, to the foamed material into
After row maturation stage, molding foaming layer is obtained.
Optionally, the foamed material is polyurethane material.
Through the above technical solutions, the present invention provides a kind of preparation method of carpet that foams, the preparation of the foaming carpet
Method is pressed and molded after handling by using first foaming, enables the independent foaming of foaming layer, improve foaming layer at
Quality reduces the risk that foaming layer has production defect, by the way that carpet body and qualified foaming layer to be molded into
Type improves the yield rate of foaming carpet, reduces production cost.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of carpet that foams provided by the invention.
Description of symbols
1, raising needle punched carpet fabric；2, polyethylene film；3, felt；4, foaming layer；5, carpet body；6, foam carpet.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The present invention provides a kind of preparation method of carpet that foams, the preparation method of the foaming carpet 6 includes:
S1: foamed material being injected into the foaming mould of the shape design of the foaming layer 4 according to the foaming carpet 6, into
Row foaming, to obtain molding foaming layer 4；
S2: the foaming layer 4 and the stacking of carpet body 5 being placed in die cutting die, compression molding and cutting process are carried out,
To obtain the molding foaming carpet 6.
Through the above technical solutions, the present invention provides a kind of preparation method of carpet that foams, the preparation of the foaming carpet
Method is pressed and molded after handling by using first foaming, enables the independent foaming of foaming layer, improve foaming layer at
Quality reduces the risk that foaming layer has production defect, by the way that carpet body and qualified foaming layer to be molded into
Type improves the yield rate of foaming carpet, reduces production cost.
For convenience carpet body 5 is pressed and molded, by the carpet body 5 be put into the die cutting die it
Before, first heated the carpet body 5, has thoroughly overturned traditional foaming carpet and needed in compression molding on ground
The technology pattern of adhesive coating between blanket ontology and foaming layer avoids the adhesive coating between carpet body and foaming layer
Either increase EVA coating, reduces the volatile quantity of volatile organic compounds VOC, reduce penetrating odor, it is more green
Environmental protection improves user experience.
In order to meet the process requirements of carpet body 5, the heating temperature setting of the heat treatment are as follows: 190 ° -210 °, with
Carpet body 5 is enabled to reach 190 ° -210 ° of processing temperature.It is understood that the carpet body 5 can be by various
Reasonable heating device is heated, for example, carrying out contact heating by heating furnace, is conducive to adding for carpet body 5
Hot temperature is more accurate.
In order to simplify foaming carpet production technology, into die cutting die before carpet body 5 can not have to carry out at
Type processing, for example, in step s 2, the carpet body 5 is set as planar structure, simplifies the processing technology of carpet body 5,
Using the carpet body 5 of plane, keeps its scope of selecting material more extensive, reduce production cost.
In the production process of foaming carpet, in order to continuously provide carpet body 5 for die cutting die, it can use
Transport device is that die cutting die supplies carpet body 5.For example, in step s 2, by chain transmitting device by the carpet sheet
Body 5 is transferred in the die cutting die.Specifically, the feed end of the chain transmitting device extends at heating device, chain is passed
The delivery end of defeated device extends at die cutting die, in order to which chain transmitting device can be by the carpet body 5 after heating in a steady stream
It is constantly transferred in die cutting die, improves the production efficiency of foaming carpet.
When die cutting die makes foaming carpet, in order to enable die cutting die can quickly and smoothly carry out punch forming,
The die cutting die includes the upper mold and lower mold of adaptation, step S2 include: S21, first the foaming layer 4 is placed on it is described
In lower mold, then the carpet body 5 is placed in the foaming layer 4, so that foaming layer 4 and carpet body 5 can be suitable
Benefit is placed in die cutting die, easy to process；S22, the upper mold is driven to move down, until with the lower mold cooperation
Until position, be conducive to carry out compression molding processing to foaming layer 4 and carpet body 5.
In entire production technology, foaming mould is designed according to the shape of the foaming layer 4 of foaming carpet, to add
Work obtains the foaming layer 4 of foaming carpet, it is, 4 shape of foaming layer of foaming mould prepared foaming layer 4 and foaming carpet
Shape coincide.In view of the carpet body entered in die cutting die is planar structure, be bound to the foaming carpet that will not be obtained with manufacture
The shape of carpet body match, for the yield rate for the carpet that guarantees to foam, then can select the carpet body of larger area into
It is processed in row die cutting die.In order to which carpet body extra around the carpet that foams smoothly is cut off, the die cutting die packet
Cutting member is included, the cutting member is slidably attached at the upper mold, and the cutting member is configured to along the lower die
The lateral surface of tool moves down carry out cutting process, wherein step S2 includes: S23, moves to and the lower die to the upper mold
When having the position of cooperation, the cutting member is moved down, the carpet body 5 is cooperated along the upper mold and lower mold
Outer boundary is cut, to obtain the molding foaming carpet 6.It is understood that foaming carpet only has part to need to set
Foaming layer 4 is set, therefore, die cutting die is set as matching with the shape of foaming carpet, and the lower mold of die cutting die is set as office
Portion matches with the shape of foaming layer, simplifies processing technology.Certainly, it is assumed that the foaming carpet is as automobile carpet next life
Produce, not only need to carry out above-mentioned side cutting, it is also necessary to carry out hole cutting, then the upper mold of die cutting die be used for and carpet
The interior frame of alloy structure, the shape of the interior frame and the hole shape one of automobile carpet are provided on the bottom wall of body contacts
Cause, when upper mold and lower mold close film, then cut the redundance of carpet body so that foaming carpet formed it is required
Pore structure.
In view of the comfort and sound absorption qualities of the carpet that foams, the carpet body 5 is set as being sequentially stacked from the top down
There is the multi-layer compound structure of raising needle punched carpet fabric 1, polyethylene film 2 and felt 3, optimizes the foot-operated comfort body of user
It tests.As shown in Figure 1, foaming carpet is set as the composite construction of the carpet body being sequentially stacked from the top down and foaming layer, such as Fig. 1
Shown, foaming carpet is set as being sequentially stacked raising needle punched carpet fabric 1, polyethylene film 2, felt 3 and foaming from the top down
The multi-layer compound structure of layer 4.Wherein, raising needle punched carpet fabric 1 is processed to obtain using fleece fabric by needle point method, rises
Velvet fabric is conventional fabric when making carpet, and felt 3 is set as conventional felt material, for example, PP/PET felt (polypropylene/poly- pair
Phthalic acids plastics felt), certainly, felt 3 and raising needle punched carpet fabric 1 can be set to planar structure.
Further, the foaming mould includes the upper foaming mould and lower foaming mould of adaptation, and the upper foaming mould includes using
In accommodate foaming machine gun head feeding inlet, wherein step S1 include: first by the upper foaming mould and lower foaming mould mold with
Accommodating chamber is formed, is then injected into the foamed material in the accommodating chamber by the foaming machine gun head, to the foamed material
After carrying out maturation stage, molding foaming layer 4 is obtained, since foaming mould is smaller than the volume of die cutting die, is more convenient to foaming
Layer is processed, and is significantly improved the yield rate of foaming layer, is reduced the production cost.
Further, the foamed material is polyurethane material, and at low cost, sound absorption qualities are good, and comfort is good.
A kind of specific embodiment according to the present invention, the preparation method for the carpet that foams, comprising the following steps:
S1: first passing through hydraulic press and move down foaming mould, until the upper foaming mould and lower foaming mould molded with
Accommodating chamber is formed, then, foamed material is injected into the foaming mould of the shape design of the foaming layer 4 according to the foaming carpet 6
In, foaming is carried out, after the foamed material carries out maturation stage, to obtain molding foaming layer 4；Wherein, foaming layer 4 is
PU bed course (polyurethane cushion), the working condition of foaming can be set to the routine life that polyurethane material carries out foaming
Production condition.
S2: the foaming layer 4 and the stacking of carpet body 5 being placed in die cutting die, compression molding and cutting process are carried out,
To obtain the molding foaming carpet 6.It is specific as follows:
S21, first the foaming layer 4 is placed in the lower mold, the carpet body 5 is then placed on the foaming
On layer 4；Wherein, before the carpet body 5 is put into the die cutting die, the carpet body 5 is first made to pass through heating dress
It sets progress contact heating processing and carpet body 5 is then transported to the feed end of chain transmitting device from heating device, pass through
The transport of chain transmitting device is crossed, which is moved to the delivery end of chain transmitting device, then from chain transmitting device
Delivery end is transported in the lower mold for being embedded with foaming layer 4.Certainly, foaming layer 4 is transported to the corresponding of lower mold from foaming mould
The process of model part can use manual operation, mechanized operation can also be used, for example, manipulator；Carpet body 5 from
During heating device is transported to chain transmitting device, heating device can be arranged in the feed end of chain transmitting device
Lower section realizes that carpet body is transported in lower mold from chain transmitting device by manipulator, can use manual operation, or
Person is mechanized operation, for example, either setting higher than the delivery end of chain transmitting device for lower mold using manipulator
Spend it is slightly lower, in order to which carpet body can be transported to automatically on lower mold from chain transmitting device.In addition, the heating of carpet body
Temperature setting is 190 ° -210 °, and the temperature in chain transmitting device transportational process is kept approximately constant.
S22, the upper mold is driven to move down by hydraulic press, until with the position of the lower mold cooperation.
S23, when the upper mold moves to the position with the lower mold cooperation, move down the cutting member, will
The carpet body 5 is cut along the outer boundary that the upper mold and lower mold cooperate, to obtain the molding foaming ground
Blanket 6.It is understood that driving upper mold to move up by hydraulic press, to open die-cutting mould, that is, molding hair can be taken off
Steep carpet.
It is noted that be used to prepare foaming carpet equipment be used to prepare in the art foam carpet routine set
Standby, details are not described herein, and still, which includes above-mentioned foaming mould, die cutting die, heating dress
Set with chain transmitting device etc., as long as example, foaming mould can complete in step S1 by foamed material carry out foaming with
To the foaming layer 4, as long as die cutting die can complete that foaming layer 4 and the stacking of carpet body 5 are placed on punching in step S2
It cuts and carries out compression molding and cutting process in mold to obtain molding foaming carpet 6, as long as heating device can be over the ground
Blanket ontology 5 is heated to 190 ° -210 ° in a manner of contact heating, as long as chain transmitting device can will be heated to be
In 190 ° -210 ° of 5 smooth delivery of power of carpet body to the lower mold for being embedded with foaming layer 4 of die cutting die.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited thereto.At this
It, can be with various simple variants of the technical solution of the present invention are made, in order to avoid unnecessary in the range of the technology design of invention
It repeats, the invention will not be further described in various possible combinations.But these simple variants and combination equally should be considered as
Content disclosed in this invention, all belongs to the scope of protection of the present invention.
Claims (10)
1. it is a kind of foam carpet preparation method, which is characterized in that it is described foaming carpet (6) preparation method include:
S1: foamed material is injected into the foaming mould according to the shape design of the foaming layer (4) of foaming carpet (6), into
Row foaming, to obtain molding foaming layer (4)；
S2: the foaming layer (4) and carpet body (5) stacking being placed in die cutting die, compression molding and cutting process are carried out,
To obtain the molding foaming carpet (6).
2. the preparation method of foaming carpet according to claim 1, which is characterized in that put by the carpet body (5)
To before the die cutting die, first heated the carpet body (5).
3. the preparation method of foaming carpet according to claim 2, which is characterized in that the heating temperature of the heat treatment
Setting are as follows: 190 ° -210 °.
4. the preparation method of foaming carpet according to claim 2, which is characterized in that in step s 2, the carpet sheet
Body (5) is set as planar structure.
5. the preparation method of foaming carpet according to claim 2, which is characterized in that in step s 2, passed by chain
The carpet body (5) are transferred in the die cutting die by defeated device.
6. the preparation method of foaming carpet according to claim 1, which is characterized in that the die cutting die includes adaptation
Upper mold and lower mold, step S2 include:
S21, first the foaming layer (4) is placed in the lower mold, the carpet body (5) is then placed on the foaming
On layer (4)；
S22, the upper mold is driven to move down, until with the position of the lower mold cooperation.
7. the preparation method of foaming carpet according to claim 6, which is characterized in that the die cutting die includes cutting
Part, the cutting member are slidably attached at the upper mold, and the cutting member is configured to along the outer of the lower mold
Side moves down carry out cutting process, wherein step S2 includes:
S23, when the upper mold moves to the position with the lower mold cooperation, move down the cutting member, will be described
Carpet body (5) is cut along the outer boundary that the upper mold and lower mold cooperate, to obtain the molding foaming carpet
(6)。
8. the preparation method of foaming carpet according to claim 1, which is characterized in that the carpet body (5) is set as
It is sequentially stacked the multi-layer compound structure of raising needle punched carpet fabric (1), polyethylene film (2) and felt (3) from the top down.
9. the preparation method of foaming carpet according to claim 1, which is characterized in that the foaming mould includes adaptation
Upper foaming mould and lower foaming mould, the upper foaming mould include the feeding inlet for accommodating foaming machine gun head, wherein step S1 packet
It includes: first molding the upper foaming mould and lower foaming mould to form accommodating chamber, the foamed material is then passed through into the hair
Bubble machine gun head is injected into the accommodating chamber, after the foamed material carries out maturation stage, obtains molding foaming layer (4).
10. the preparation method of foaming carpet according to claim 9, which is characterized in that the foamed material is polyurethane material
Material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910753641.7A CN110509644A (en) | 2019-08-15 | 2019-08-15 | A kind of preparation method for the carpet that foams |
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| CN204659531U (en) * | 2015-05-25 | 2015-09-23 | 广州传奇汽车配件有限公司 | Automobile ground mat |
| CN106476077A (en) * | 2015-08-28 | 2017-03-08 | 长城汽车股份有限公司 | The production technology of foaming carpet, production equipment and foaming die cutting die |
| CN205836616U (en) * | 2016-07-18 | 2016-12-28 | 重庆市久满汽车内饰件有限公司 | A kind of car carpeting |
| CN206357730U (en) * | 2017-03-22 | 2017-07-28 | 上海泰瑞电子科技有限公司 | Water falling groove of automobile sound-heat insulated cushion |
| CN109249672A (en) * | 2018-09-20 | 2019-01-22 | 无锡吉兴汽车部件有限公司 | The production technology of automobile ceiling head airbag weakened line |
| CN109823012A (en) * | 2018-12-29 | 2019-05-31 | 浙江华江科技股份有限公司 | Ultralight high sound-absorbing GMT enhancing PU Thermoplastic Automotive interior decorative composite board of one kind and preparation method thereof |
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Application publication date: 20191129 |