CN108724545B - Production process of polyurethane leftover material mold making and three-dimensional core material structure polyurethane foaming passenger car air duct - Google Patents
Production process of polyurethane leftover material mold making and three-dimensional core material structure polyurethane foaming passenger car air duct Download PDFInfo
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- CN108724545B CN108724545B CN201810423297.0A CN201810423297A CN108724545B CN 108724545 B CN108724545 B CN 108724545B CN 201810423297 A CN201810423297 A CN 201810423297A CN 108724545 B CN108724545 B CN 108724545B
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
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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
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. 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
- B29C44/58—Moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
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- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Compared with the existing foaming mold manufacturing process, the production process has the advantages that the heat preservation performance of the mold can be better, the glass fiber has excellent toughness and strength, the service life of the mold can be prolonged after reasonable allocation, and the leftover material is added with resin to have coagulability and can promote mold forming. The polyurethane glass fiber reinforced hard foaming leftover materials are used as mold fillers, so that resource recycling can be realized, and the mold cost input is reduced. The polyurethane material is kept at a constant temperature in the process of transfer foaming by adding the heat-insulating layer through the mold, so that the polyurethane material has good fluidity; the use of the three-dimensional core material can reduce the use amount of the polyurethane material, realize the weight reduction of the product and shorten the production period.
Description
Technical Field
The invention relates to the field of automotive interior production, in particular to a production process of a polyurethane leftover material mold and a three-dimensional core material structure polyurethane foamed passenger car air duct.
Background
At present, the country puts more importance on environmental protection and advocates resource recycling, and in recent years, the rise of new energy automobiles leads to the lightweight becoming one of the channels for reducing weight, reducing consumption and increasing voyage.
In the air duct of the existing passenger car/bus, the main purposes are flax fiber board + PVC, glass fiber reinforced hard foaming + PVC, PVC extrusion molding and aluminum alloy air duct.
1) Flax fiber board + PVC: the product is obtained by adopting a hot-press forming process, namely the flax fiber board is heated and then is subjected to compression molding, the product is light in weight, but the strength and the hardness cannot meet the use requirements, the flame retardant property, the smoke density and the oxygen index are not easy to control, and the standard requirement of JT/T1095-2016 is not easy to meet.
2) Glass fiber reinforced hard foam + PVC: the general operation flow is that the fabric is laid, the PU material is sprayed on the fabric, then a layer of toughening and ventilating composite material is covered on the PU material, and the product is obtained by closing the die and foaming. The product has higher hardness, can meet the standard requirement of JT/1095-2016 by formula adjustment, but has unobvious weight reduction and long production period.
3) PVC extrusion molding wind channel: after plastic particles are cured at high temperature, the plastic particles are extruded and molded through equipment dies; the weight is relatively light, but the strength is insufficient, because the material is completely thermoplastic, and the material is easy to deform in a high-temperature environment.
Disclosure of Invention
The present invention aims to overcome the above-mentioned shortcomings and provide a technical solution to solve the above-mentioned problems. A polyurethane leftover material molding method comprises the following specific steps:
1) preparing a mold before manufacturing: intensively collecting polyurethane leftover materials, crushing the collected polyurethane leftover materials to process the polyurethane leftover materials into a particle material with the diameter of 3-5 mm, and fully stirring and infiltrating the crushed polyurethane leftover materials and resin;
2) model processing: manufacturing a workpiece model for die making through machine tool machining according to a pre-designed drawing, and determining a parting surface between an upper die and a lower die on the workpiece model;
3) manufacturing a lower-layer die: the manufacturing method comprises the following steps of (1) punching demolding wax on the surface of one side of a parting surface, spraying gel coat with the thickness of 0.8-1.0 mm on the demolding wax, pasting three layers of surface felts and two layers of glass fibers on the gel coat, paving ten layers of check cloth, smearing a mixture of polyurethane leftover material crushed aggregates and resin which are fully stirred and soaked on the check cloth, wherein the thickness of the mixture is 5-8 cm, meanwhile, paving heating pipes on the mixture layer of the polyurethane leftover material crushed aggregates and the resin at intervals of 10-12 cm, pasting one layer of glass fibers, finally pasting four layers of check cloth for four times, and preparing for curing and demolding;
4) manufacturing an upper layer die: adhering sponge glue with the same thickness as a product on the surface of the side, which is not molded, of a parting surface of a workpiece model for ensuring the thickness of the product, then pasting three layers of surface felts and two layers of glass fibers on the sponge glue, then paving ten layers of check cloth, then smearing a mixture of polyurethane leftover material crushed aggregates and resin which are fully stirred and soaked on the check cloth, wherein the thickness is 5-8 cm, meanwhile, paving heating pipes between the ten layers of check cloth and the polyurethane leftover material crushed aggregates according to the distance of 10-12 cm, pasting one layer of glass fibers, finally pasting four layers of check cloth, pasting four times, and then preparing for curing and demolding;
5) manufacturing a mold frame: fixing the periphery of the demoulded mould by using angle iron to prevent the mould from deforming;
6) and (3) fine trimming of the die: cutting, polishing and repairing the die;
7) trial production of products: trial production of 2-4 workpieces, and detection of whether the sizes of the workpieces meet the requirements of drawings or not;
as a further scheme of the invention: in the step 1), the collected polyurethane leftover materials are polyurethane glass fiber reinforced hard foaming recycled materials, the polyurethane glass fiber reinforced hard foaming leftover materials are made into particle materials with the diameter of 3-5 mm by using a crushing machine, special treatment is not needed, the particle materials and 191 resin are mixed and stirred, and after 20-30 minutes, the resin and the crushed materials are fully soaked.
As a further scheme of the invention: the difference between the workpiece model manufactured in the step 2) and the normal product workpiece is that a flange with the thickness of 3mm exists on the parting surface of the workpiece model besides the material difference, namely the workpiece model converts the conceptual workpiece parting surface into a physical separating flange.
As a further scheme of the invention: in the steps 3) and 4), the bottom layer of the mold is thick, mainly for enhancing the strength of the mold, the thickness of the bottom layer is close to that of the cavity layer, and the bottom layer is thin, mainly for ensuring the constant temperature and heat conduction of the mold in the product molding process, so that the product molding is facilitated.
As a further scheme of the invention: in step 5), the section of the mold frame is rectangular, and resin is filled between the outer surface of the mold and the mold frame.
As a further scheme of the invention: and 6), cutting and polishing the irregular edge of the demoulded mould, observing the inner wall of the cavity, repairing the damage caused by demoulding by using the same material, and finely polishing the inner wall of the cavity after repairing.
The process for producing the passenger car air duct foamed by polyurethane with the three-dimensional core material structure by using the mould prepared by the method has a composite structure, comprises a coating layer, a core material and a glass fiber reinforced polyurethane layer, and comprises the following specific production process steps:
s1, mold treatment: cleaning the die and preheating the die;
s2, laying fabric: laying a fabric on the lower die of the die, wherein the fabric can be PVC, PVC/ABS, novel PVC micro-foaming or aluminum film, and the purpose is to beautify the product and avoid painting;
s3, spraying polyurethane: spraying polyurethane on the fabric;
s4, laying a three-dimensional core material: laying a three-dimensional core material on the fabric sprayed with polyurethane;
the three-dimensional core material is a reticular honeycomb thermosetting material, the density of the material is 350-400 g/square meter, and the purpose is to realize a light structure and reduce the use of polyurethane materials;
s5, injecting a polyurethane material: spraying a polyurethane material on the three-dimensional core material;
s6, mold closing and foaming: after the polyurethane material is injected, die assembly is carried out, and the die assembly time is as follows: 5-8min, wherein the die closing pressure is as follows: 8-12 MPa;
s7, cooling and forming: and demolding after cooling.
As a further scheme of the invention: in the steps S3 and S5, the spraying operation is finished by a manipulator; after the material injection manipulator receives the instruction, the mixing head of the material injection manipulator automatically cuts the carbon fiber bundle, and after the carbon fiber bundle is fully infiltrated with the polyurethane material through the mixing cavity, the three-dimensional core material is sprayed at uniform speed so as to ensure that the core material can be completely sprayed to the polyurethane material.
The polyurethane material in the steps S3 and S5 is a two-component material, and the polyurethane material comprises the following raw materials in parts by weight: 80 parts of polyester polyol, 20 parts of polyether polyol, 1 part of monofluoro dichloroethane, 0.5 part of water, 0.9 part of pentamethyl diethylenetriamine, 0.9 part of N, N-dimethyl cyclohexylamine, 0.9 part of B8455 foam stabilizer, 0.9 part of B8510 foam stabilizer, 10 parts of tri (2-chloroethyl) phosphate and 125 parts of isocyanate, so that the flame retardant, oxygen index and smoke density effects of the product are optimal; the polyurethane spraying flow is 90 mg/s.
Compared with the prior art, the invention has the beneficial effects that:
compared with the existing foam mold manufacturing process, the polyurethane leftover material is a polyurethane glass fiber reinforced hard foam reclaimed material containing a large amount of glass fibers, polyurethane and resin. The polyurethane has excellent heat preservation characteristic, so that the heat preservation performance of the mold can be better, the glass fiber has excellent toughness and strength, the service life of the mold can be prolonged after reasonable blending, and the recycled material is added with resin, so that the mold has good coagulability and can promote mold forming. The polyurethane glass fiber reinforced hard foaming leftover materials are used as mold fillers, so that resource recycling can be realized, and the mold cost input is reduced.
The polyurethane material is kept at a constant temperature in the process of transfer foaming by adding the heat-insulating layer through the mold, so that the polyurethane material has good fluidity; the use of the three-dimensional core material can reduce the use amount of polyurethane materials, realize the weight reduction of products and shorten the production period, the two sides of the three-dimensional core material are both made of polyurethane, and the composite structure of the products is firm by utilizing the inherent viscosity of the polyurethane.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The production process of the passenger car air duct with the three-dimensional core material structure and the polyurethane foam comprises the following steps:
1. the method for manufacturing the mold by utilizing the polyurethane leftover material comprises the following specific steps:
1) preparing a mold before manufacturing: intensively collecting polyurethane leftover materials, crushing the collected polyurethane leftover materials to process the polyurethane leftover materials into a particle material with the diameter of 3-5 mm, and fully stirring and infiltrating the crushed polyurethane leftover materials and resin;
the collected polyurethane leftover materials are polyurethane glass fiber reinforced hard foaming recycled materials, the polyurethane glass fiber reinforced hard foaming leftover materials are made into particle materials with the diameter of 3-5 mm by using a crushing machine, special treatment is not needed, the particle materials and 191 resin are mixed and stirred, and after 20-30 minutes, the resin and crushed materials are fully soaked.
2) Model processing: manufacturing a workpiece model for die making through machine tool machining according to a pre-designed drawing, and determining a parting surface between an upper die and a lower die on the workpiece model;
the difference between this workpiece model and a normal production workpiece is, in addition to the material differences, the presence of a flange of 3mm thickness at the parting plane of the workpiece model, i.e. the workpiece model converts the notional workpiece parting plane into a physically separate flange.
3) Manufacturing a lower-layer die: the manufacturing method comprises the following steps of (1) punching demolding wax on the surface of one side of a parting surface, spraying gel coat with the thickness of 0.8-1.0 mm on the demolding wax, pasting three layers of surface felts and two layers of glass fibers on the gel coat, paving ten layers of check cloth, smearing a mixture of polyurethane leftover material crushed aggregates and resin which are fully stirred and soaked on the check cloth, wherein the thickness of the mixture is 5-8 cm, meanwhile, paving heating pipes on the mixture layer of the polyurethane leftover material crushed aggregates and the resin at intervals of 10-12 cm, pasting one layer of glass fibers, finally pasting four layers of check cloth for four times, and preparing for curing and demolding;
4) manufacturing an upper layer die: adhering sponge glue with the same thickness as a product on the surface of the side, which is not molded, of a parting surface of a workpiece model for ensuring the thickness of the product, then pasting three layers of surface felts and two layers of glass fibers on the sponge glue, then paving ten layers of check cloth, then smearing a mixture of polyurethane leftover material crushed aggregates and resin which are fully stirred and soaked on the check cloth, wherein the thickness is 5-8 cm, meanwhile, paving heating pipes between the ten layers of check cloth and the polyurethane leftover material crushed aggregates according to the distance of 10-12 cm, pasting one layer of glass fibers, finally pasting four layers of check cloth, pasting four times, and then preparing for curing and demolding;
when lower floor's mould was gone up in the system, the mould bottom is thicker, mainly is for reinforcing mould intensity, is close to the bed thickness on die cavity layer, and the thickness of lower floor is mainly for in the product forming process, guarantees mould constant temperature and heat conduction, the product shaping of being convenient for.
5) Manufacturing a mold frame: fixing the periphery of the demoulded mould by using angle iron to prevent the mould from deforming;
6) and (3) fine trimming of the die: cutting, polishing and repairing the die;
cutting and polishing the irregular edge of the demoulded mould, observing the inner wall of the cavity, repairing the damage caused by demoulding by using the same material, and finely polishing the inner wall of the cavity after the repairing is finished.
7) Trial production of products: trial production of 2-4 workpieces, and detection of whether the sizes of the workpieces meet the requirements of drawings or not;
the passenger car air duct with the three-dimensional core material structure and the polyurethane foam is produced after the mould is manufactured by the method, the structure of the passenger car air duct is a composite structure and comprises a coating layer, a core material and a glass fiber reinforced polyurethane layer, and the specific production process comprises the following steps:
s1, mold treatment: cleaning the die and preheating the die;
s2, laying fabric: laying a fabric on the lower die of the die, wherein the fabric can be PVC, PVC/ABS, novel PVC micro-foaming or aluminum film, and the purpose is to beautify the product and avoid painting;
s3, spraying polyurethane: spraying polyurethane on the fabric;
s4, laying a three-dimensional core material: laying a three-dimensional core material on the fabric sprayed with polyurethane;
the three-dimensional core material is a reticular honeycomb thermosetting material, the density of the material is 350-400 g/square meter, and the purpose is to realize a light structure and reduce the use of polyurethane materials;
s5, injecting a polyurethane material: spraying a polyurethane material on the three-dimensional core material;
s6, mold closing and foaming: after the polyurethane material is injected, die assembly is carried out, and the die assembly time is as follows: 5-8min, wherein the die closing pressure is as follows: 8-12 MPa;
s7, cooling and forming: and demolding after cooling.
In the above steps S3 and S5, the painting operation is completed by the robot; after the material injection manipulator receives the instruction, the mixing head of the material injection manipulator automatically cuts the carbon fiber bundle, and after the carbon fiber bundle is fully infiltrated with the polyurethane material through the mixing cavity, the three-dimensional core material is sprayed at uniform speed so as to ensure that the core material can be completely sprayed to the polyurethane material.
The polyurethane material is a two-component material, and comprises the following raw materials in parts by weight: 80 parts of polyester polyol, 20 parts of polyether polyol, 1 part of monofluoro dichloroethane, 0.5 part of water, 0.9 part of pentamethyl diethylenetriamine, 0.9 part of N, N-dimethyl cyclohexylamine, 0.9 part of B8455 foam stabilizer, 0.9 part of B8510 foam stabilizer, 10 parts of tri (2-chloroethyl) phosphate and 125 parts of isocyanate, so that the flame retardant, oxygen index and smoke density effects of the product are optimal; the polyurethane spraying flow is 90 mg/s.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (8)
1. A polyurethane leftover material molding method is characterized by comprising the following specific steps:
1) preparing a mold before manufacturing: intensively collecting polyurethane leftover materials, crushing the collected polyurethane leftover materials to process the polyurethane leftover materials into a particle material with the diameter of 3-5 mm, and fully stirring and infiltrating the crushed polyurethane leftover materials and resin;
2) model processing: manufacturing a workpiece model for die making through machine tool machining according to a pre-designed drawing, and determining a parting surface between an upper die and a lower die on the workpiece model;
3) manufacturing a lower-layer die: the manufacturing method comprises the following steps of (1) punching demolding wax on the surface of one side of a parting surface, spraying gel coat with the thickness of 0.8-1.0 mm on the demolding wax, pasting three layers of surface felts and two layers of glass fibers on the gel coat, paving ten layers of check cloth, smearing a mixture of polyurethane leftover material crushed aggregates and resin which are fully stirred and soaked on the check cloth, wherein the thickness of the mixture is 5-8 cm, meanwhile, paving heating pipes between the ten layers of check cloth and the polyurethane leftover material crushed aggregates at intervals of 10-12 cm, pasting one layer of glass fibers, finally pasting four layers of check cloth for four times, and preparing for curing and demolding;
4) manufacturing an upper layer die: sticking sponge glue with the same thickness as a product on the surface of the non-molded side of the parting surface of the workpiece model, then pasting three layers of surface felts and two layers of glass fibers on the sponge glue, then paving ten layers of check cloth, then smearing a mixture of the polyurethane leftover material crushed aggregates and resin which are fully stirred and soaked on the check cloth, wherein the thickness is 5-8 cm, meanwhile, paving heating pipes between the ten layers of check cloth and the polyurethane leftover material crushed aggregates at intervals of 10-12 cm, pasting one layer of glass fibers, finally pasting four layers of check cloth for four times, and then preparing for curing and demolding;
5) manufacturing a mold frame: fixing the periphery of the demoulded mould by using angle iron to prevent the mould from deforming;
6) and (3) fine trimming of the die: cutting, polishing and repairing the die;
7) trial production of products: 2-4 workpieces are produced in a trial mode, and whether the sizes of the workpieces meet the requirements of drawings or not is detected.
2. The method for molding the polyurethane leftover material as claimed in claim 1, wherein the collected polyurethane leftover material is a polyurethane glass fiber reinforced hard foam recycled material, the polyurethane glass fiber reinforced hard foam leftover material is made into a particle material with the diameter of 3-5 mm by using a crusher, the particle material is mixed with 191 resin and stirred without special treatment, and after 20-30 minutes, the resin and the crushed material are fully infiltrated.
3. The method for molding polyurethane offcut according to claim 1, wherein the difference between the workpiece model manufactured in step 2) and a normal product workpiece is that, in addition to the material difference, a flange having a thickness of 3mm is present at the parting surface of the workpiece model, i.e., the workpiece model converts the conceptual workpiece parting surface into a physically separating flange.
4. The method of molding polyurethane scrap according to claim 1, wherein in step 5), the mold frame has a rectangular cross section, and the space between the outer surface of the mold and the mold frame is filled with resin.
5. The method for molding polyurethane leftover material according to claim 1, wherein in the step 6), the irregular edge of the mold after demolding is cut and polished, the inner wall of the cavity is observed, the damage caused during demolding is repaired by using the same material, and the inner wall of the cavity is finely polished after the repair is completed.
6. The process for producing the passenger car air duct foamed by polyurethane with the three-dimensional core material structure by using the mold prepared by the method of claim 1, wherein the passenger car air duct is of a composite structure and comprises a coating layer, a core material and a glass fiber reinforced polyurethane layer, and is characterized by comprising the following specific process steps:
s1, mold treatment: cleaning the die and preheating the die;
s2, laying fabric: laying a fabric on the lower die of the die, wherein the fabric is one of PVC, PVC/ABS, PVC micro-foaming or aluminum films;
s3, spraying polyurethane: spraying polyurethane on the fabric;
s4, laying a three-dimensional core material: laying a three-dimensional core material on the fabric sprayed with polyurethane;
the three-dimensional core material is a reticular honeycomb thermosetting material, and the density of the material is 350-400 g per square meter;
s5, injecting a polyurethane material: spraying a polyurethane material on the three-dimensional core material;
s6, mold closing and foaming: after the polyurethane material is injected, die assembly is carried out, and the die assembly time is as follows: 5-8min, wherein the die closing pressure is as follows: 8-12 MPa;
s7, cooling and forming: and demolding after cooling.
7. The process for producing the air duct of the passenger car with the three-dimensional core material structure and the polyurethane foam according to claim 6, wherein the spraying operation is completed by a manipulator in the steps S3 and S5; after the material injection manipulator receives the instruction, the mixing head of the material injection manipulator automatically cuts the carbon fiber bundle, and after the carbon fiber bundle is fully infiltrated with the polyurethane material through the mixing cavity, the three-dimensional core material is sprayed at uniform speed so as to ensure that the core material can be completely sprayed to the polyurethane material.
8. The process for producing the air duct of the passenger car with the three-dimensional core material structure and the polyurethane foam according to claim 6, wherein the polyurethane material in the steps S3 and S5 is a two-component material, and the raw materials of the two-component material comprise the following components in parts by weight: 80 parts of polyester polyol, 20 parts of polyether polyol, 1 part of monofluoro dichloroethane, 0.5 part of water, 0.9 part of pentamethyl diethylenetriamine, 0.9 part of N, N-dimethyl cyclohexylamine, 0.9 part of B8455 foam stabilizer, 0.9 part of B8510 foam stabilizer, 10 parts of tri (2-chloroethyl) phosphate and 125 parts of isocyanate, so that the flame retardant, oxygen index and smoke density effects of the product are optimal; the polyurethane spraying flow is 90 mg/s.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1634697A (en) * | 2004-12-29 | 2005-07-06 | 刘明春 | Recovery and molding process for phenol-formaldehyde resin composite waste |
| DE102013222011A1 (en) * | 2013-10-30 | 2015-04-30 | Bayerische Motoren Werke Aktiengesellschaft | Method for producing an undercut molding |
| CN106985322A (en) * | 2017-04-18 | 2017-07-28 | 贵州华云汽车饰件制造有限公司 | A kind of production technology of the inlet vent of bus of use sandwich structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150081037A (en) * | 2014-01-03 | 2015-07-13 | 대주정공 주식회사 | Method forming stitch on foamed interior material surface for vehicle |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1634697A (en) * | 2004-12-29 | 2005-07-06 | 刘明春 | Recovery and molding process for phenol-formaldehyde resin composite waste |
| DE102013222011A1 (en) * | 2013-10-30 | 2015-04-30 | Bayerische Motoren Werke Aktiengesellschaft | Method for producing an undercut molding |
| CN106985322A (en) * | 2017-04-18 | 2017-07-28 | 贵州华云汽车饰件制造有限公司 | A kind of production technology of the inlet vent of bus of use sandwich structure |
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