CN112157909A - Manufacturing process of TPU (thermoplastic polyurethane) -based high-performance automobile instrument panel - Google Patents
Manufacturing process of TPU (thermoplastic polyurethane) -based high-performance automobile instrument panel Download PDFInfo
- Publication number
- CN112157909A CN112157909A CN202010926220.2A CN202010926220A CN112157909A CN 112157909 A CN112157909 A CN 112157909A CN 202010926220 A CN202010926220 A CN 202010926220A CN 112157909 A CN112157909 A CN 112157909A
- Authority
- CN
- China
- Prior art keywords
- instrument panel
- mass
- tpu
- parts
- powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/141—Processes of additive manufacturing using only solid materials
- B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
-
- 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
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- 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
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/35—Cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention provides a manufacturing process of a TPU-based high-performance automobile instrument panel. The process comprises the following steps: selecting industrial-grade equipment suitable for Selective Laser Sintering (SLS) of polymer materials for forming; designing three-dimensional models of all split bodies of the assembled automobile instrument panel; adding impact-resistant, sun exposure-resistant and functional fillers into TPU powder serving as a base material, and mechanically mixing to prepare functional TPU composite powder; setting technological parameters of SLS, carrying out SLS molding on the mixed powder, and printing a standard sample strip; carrying out performance test on the printed standard sample strip; and forming the automobile instrument panel (split), performing sand blasting, powder cleaning and other treatment on the automobile instrument panel (split) after SLS forming, and finally assembling to obtain a finished product. The process for SLS molding of the TPU-based high-performance automobile instrument panel has the advantages of simple operation and high flexibility, and the molded automobile instrument panel has better performances of impact resistance, sun exposure prevention and the like, and has wide application prospect in the field of automobile industry.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to a manufacturing process of a TPU (thermoplastic polyurethane) based high-performance automobile instrument panel.
Background
The automobile instrument panel is a frame for mounting automobile instruments, and is generally in an assembled type, namely formed by assembling various parts. Wherein, the middle part is a thin-wall large-volume part with a complex shape and provided with a plurality of holes and holes for mounting instruments, and the two side parts are composed of two thin plates. The instruments of different automobiles are different, and the conventional instruments of the common automobile comprise a speedometer, a tachometer, an engine oil pressure gauge, a water temperature gauge, a fuel gauge and the like, so that the instrument panel of the automobile is complex in shape and structure, and needs to meet certain impact resistance and insolation resistance.
According to the existing traditional technology for preparing the automobile instrument panel, the instrument panel is generally divided into a hard plastic instrument panel, a plastic-absorbing instrument panel, a semi-hard bubble instrument panel and the like. The preparation process of the hard plastic instrument board comprises the following steps: injection molding → welding → assembling; the preparation process of the plastic uptake instrument panel comprises the following steps: injection molding/pressing → plastic sucking → cutting → assembling; the preparation process of the semi-rigid foam instrument board comprises the following steps: injection vacuum molding/slush molding → foaming → cutting → welding → assembling.
The traditional forming process method comprises the following steps:
(1) and (3) injection molding. And heating the dried plastic particles in an injection molding machine through a charging barrel and shearing by a screw rod to gradually melt and plasticize, injecting the plastic particles into a mold for molding, and cooling and shaping to obtain the product. The method is the most common and the most extensive molding processing technology for the hard plastic instrument panel body. Polypropylene (PP) is mostly used as a hard plastic instrument panel material, and Polycarbonate (PC)/acrylonitrile-butadiene-styrene terpolymer (ABS), polypropylene (PP), styrene-maleic anhydride copolymer (SMA), polyphenylene oxide (PPO, or PPE), and the like are mainly used as a material of an instrument panel framework.
(2) And (3) performing a vacuum thermoforming process. The technology heats the surface sheet to softening temperature, then uses vacuum pump to pump out the air between the sheet and the mould, makes the sheet stick to the mould cavity under the action of atmospheric pressure to form, after cooling, blows the plastic piece out of the mould by means of compressed air, and obtains the product. The material is mainly used for producing instrument panel skins and parts with high appearance requirements, and is mainly polyvinyl chloride (PVC)/acrylonitrile-butadiene-styrene terpolymer (ABS).
(3) And (3) a slush molding process. Uniformly spreading the powder raw materials on the surface of a heated mould, melting the powder raw materials, keeping the powder raw materials for a certain time, fully carrying out physical and chemical double reactions, and then cooling and shaping to obtain a product in the shape of the mould. Different heating methods play a decisive role in product quality and die service life, and mainly adopt wind heating, oil heating, sand heating and other modes.
(4) And (3) a foaming process. The polyether and the isocyanate are fully mixed and then injected into the middle of the surface skin and the framework of the mould for crosslinking and curing, foam with a required shape is formed between the surface skin and the framework, and the foam is used for connecting the surface skin and the framework and improving the hand feeling of parts. The process is a necessary process for producing the soft instrument board, and the process comprises the step of mold pouring and closed mold pouring.
The Selective Laser Sintering (SLS) used by the invention is a material increase manufacturing (3D printing) technology taking powder as a raw material, the powder is melted by using energy provided by laser and then stacked layer by layer to finally form a printed product, functional parts with complex shapes and structures and parts with difficult processing can be prepared, and the Selective Laser Sintering (SLS) has the characteristics of high forming speed, high precision and the like, and is widely applied to the fields of aerospace, biomedical treatment, automobile manufacturing and the like. By selecting the TPU-based composite material with prominent bearing capacity, impact resistance and damping performance and utilizing the SLS process to form the automobile instrument panel, the advantages of simple SLS forming technology process, no need of a support structure, high forming precision and high material utilization rate can be fully exerted, and the characteristics of no need of designing a mold, integrated design and manufacture, diversified forming materials and random shape of a workpiece can be fully exerted.
The Chinese patent application No. 201310657875.4 discloses a preparation method of a PP composite material for an automobile instrument panel, which comprises the steps of uniformly stirring raw materials by a high-speed stirrer, then transferring the raw materials into a double-screw extruder for melt extrusion, cooling, and finally performing injection molding to obtain a product. The molding process is complex, and the product may have the defects of cracking, cratering and the like.
The Chinese patent application number of 201811490369.X discloses a manufacturing process of a high-adhesion polyurethane automobile instrument board, which comprises the steps of uniformly mixing required materials in a mixing area of a mixing head of a casting machine by using a foaming machine, and casting and molding; and (4) demolding, and cutting and finishing the polyurethane foam board to obtain the instrument desk shell. The method has the advantages of complex operation, high cost, low environmental protection and great environmental pollution.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the above disadvantages, the present invention provides a process for manufacturing a thermoplastic polyurethane elastomer (TPU) -based high performance instrument panel for automobiles by SLS molding, wherein the instrument panel is assembled and formed by assembling various parts, so that different parts are respectively constructed for designing and SLS molding. The invention strives to achieve the following advantages: the process is simple, the flexibility is high, the instrument panel can be complicated and diversified, the requirements of different automobile types on the market are met, and the automobile instrument panel prepared by the process is good in quality and has good performances of impact resistance, sun exposure prevention and the like.
The invention aims to realize the purpose by the following technical scheme, and the manufacturing process of the TPU-based high-performance automobile instrument panel comprises the following steps:
(1) selecting industrial-grade equipment suitable for Selective Laser Sintering (SLS) of polymer materials for forming;
(2) designing a split three-dimensional model of each assembled automobile instrument panel, converting the model into an STL file format, slicing and dividing the cross section of the STL file, and importing the STL file into an SLS (selective laser sintering) computer-aided system;
(3) preparing impact-resistant anti-exposure functional TPU composite powder;
(4) setting SLS technological parameters, wherein the printing temperature is 110-150 ℃, the scanning speed is 6000 mm/s-12000 mm/s, the laser power is 15-45W, the powder spreading thickness is 0.10-0.30 mm, and the scanning interval is 0.08-0.30 mm;
(5) filling the TPU composite powder into SLS equipment, and forming a standard sample strip through SLS;
(6) performing performance tests on the formed standard sample strip, wherein the performance tests comprise mechanical performance tests, density tests and precision tests;
(7) and SLS molding the automobile instrument panel split body, performing sand blasting, powder cleaning and other treatments on the molded automobile instrument panel split body, and finally assembling to obtain a finished product.
Compare in the forming process (pouring, moulding plastics etc.) of traditional motormeter panel, the motormeter panel who takes SLS technical molding not only quality guarantee, can form complicated various instrument panel moreover, can not reduce its performance simultaneously. The most important point is that the prepared functional TPU composite powder (mixing TPU powder with other functional fillers) is put into SLS equipment to be sintered and molded layer by layer, and the prepared product can effectively solve the defects of cracking, insufficient filling and the like in the traditional process.
Further, in the manufacturing process of the TPU-based high-performance automobile instrument panel, the impact-resistant and insolation-resistant functional TPU composite powder comprises the following components:
(1) 100 parts of TPU powder;
(2) 10-30 parts by mass of impact-resistant filler, preferably 10-20 parts by mass;
(3) 10-30 parts by mass of a sun exposure preventing filler, preferably 10-20 parts by mass;
(4) 2-10 parts by mass of a flow aid, preferably 5-10 parts by mass;
(5) 0.1-1.5 parts by mass of a stabilizer;
(6) 2-5 parts by mass of an antioxidant;
(7) 5-15 parts by mass of talcum powder, preferably 5-10 parts by mass;
(8) 2-5 parts by mass of a coupling agent;
(9) 0.1 to 1.5 parts by mass of a weather resistant agent, preferably 0.1 to 1 part by mass.
The preparation method of the impact-resistant anti-exposure functional TPU composite powder is characterized by adding the components into a high-speed mixer in proportion and mechanically mixing for 10-40 min to obtain the impact-resistant anti-exposure functional TPU composite powder, wherein the total volume of the powder accounts for 50% of the volume of the high-speed mixer.
Furthermore, according to the manufacturing process of the TPU-based high-performance automobile instrument panel, the automobile instrument panel is split, the surface of the automobile instrument panel is similar to that of a self-skinning structure, and the inner core of the automobile instrument panel is of a hollow structure.
Further, in the manufacturing process of the TPU-based high-performance automobile instrument panel, the impact-resistant filler is one or more of glass fiber, mica powder, aluminum powder, nano silica and impact-resistant modified filler.
Wherein the impact-resistant modified filler is prepared by the following method.
(1) The following raw materials were prepared.
(2) Soaking the attapulgite in 5-30% nitric acid solution for 10-35 min, washing with deionized water for 3-5 times, and drying at 350-420 ℃.
(3) Soaking montmorillonite in 1-15% oxalic acid solution for 30-60 min, performing ultrasonic oscillation treatment in the soaking process, washing with deionized water for 3-5 times, and drying at 350-420 ℃.
(4) According to the mass percentage, 15-35 wt% of polyethylene glycol, 5-25 wt% of polyvinyl alcohol, 0.5-8 wt% of expanded graphite, 3-20 wt% of glass fiber and deionized water with the content not less than 50 wt% of the components are placed in a stirring container and stirred for 1-2 hours at the temperature of 35-40 ℃ to obtain a mixed solution.
(5) Mixing the attapulgite prepared in the step (2), the montmorillonite prepared in the step (3) and the mixed solution obtained in the step (4) according to the weight ratio of 5-8: 1-1.5: 12-15, stirring for 20-25 min by using a magnetic stirrer at the rotating speed of 500-600 r/min, and then carrying out ultrasonic oscillation treatment for 1-2 h to obtain a mixture.
(6) And (5) carrying out suction filtration on the mixture obtained in the step (5), filtering out deionized water, and drying the filter residue in a vacuum drying oven at 80-120 ℃ for 2-8 h to obtain dried powder.
(7) And (3) mixing the dry powder obtained by the treatment in the step (6) with a silane coupling agent according to a mass ratio of 30-40: 1 at a speed of 1200r/min for 10-40 min in a high-speed mixer to obtain the impact-resistant modified filler.
Further, in the manufacturing process of the TPU-based high-performance automobile instrument panel, the anti-solarization filler is one or more of asbestos powder, silica gel powder, phenolic resin, titanium dioxide powder and anti-solarization modified filler.
Wherein the anti-solarization modified filler is prepared by the following method.
Adding styrene, maleic anhydride, azodiisobutyronitrile, dimethyl trithiocarbonate and 2-methyl-dithiobenzimidazole benzyl ester into solvent cyclohexanone to form a polymerization system, and carrying out polymerization reaction for 2-6 h at 60-120 ℃ under the protection of nitrogen; then cooling to 60 ℃, adding aniline, acetic anhydride and sodium acetate, heating to 100-150 ℃, and reacting for 2-6 h; and then cooling to room temperature, pouring the reactant into ethanol to precipitate a polymer, and filtering and drying to obtain the anti-exposure modified filler.
Further, in the manufacturing process of the TPU-based high-performance automobile instrument panel, the flow assistant is one or more of nano silicon dioxide, nano aluminum oxide and nano calcium oxide.
Further, in the manufacturing process of the TPU-based high-performance automobile instrument panel, the particle size of the talcum powder is 1000-1500 meshes.
Further, in the manufacturing process of the TPU-based high-performance automobile instrument panel, the coupling agent is a silane coupling agent.
Further, in the manufacturing process of the TPU-based high-performance automobile instrument panel, the stabilizer is an ultraviolet absorbent.
Further, in the manufacturing process of the TPU-based high-performance automobile instrument panel, the antioxidant is one or two of antioxidant 1010 and antioxidant 168.
Has the advantages that: compared with the prior art, the manufacturing process of the TPU-based high-performance automobile instrument panel provided by the invention has the following advantages:
(1) the process method for forming the TPU-based high-performance automobile instrument panel by adopting SLS disclosed by the invention is simple in process and flexible to operate, can form the automobile instrument panel with a complex shape and high quality, and meets the requirements of different types of automobile instrument panels.
(2) The surface of the automobile instrument panel is similar to self-skinning, the strength, toughness, ageing resistance and other properties are good, and the inner core can be designed into a hollow structure, so that the automobile instrument panel has a light weight effect and can save raw materials.
(3) The process method for forming the TPU-based high-performance automobile instrument panel by adopting the SLS, disclosed by the invention, has the advantages that the SLS process is utilized for forming, the production efficiency is high, the time can be saved to a certain extent, and the consumption of manpower and material resources is reduced.
(4) The invention discloses a process method for forming a TPU-based high-performance automobile instrument panel by SLS, and the formed automobile instrument panel has the performances of impact resistance, insolation resistance and the like.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to specific experimental data, 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.
The following examples provide a process for manufacturing a TPU-based high performance automotive instrument panel.
The impact-resistant filler is one or more of glass fiber, mica powder, aluminum powder, nano silicon dioxide and impact-resistant modified filler.
The anti-solarization filler is one or more of asbestos powder, silica gel powder, phenolic resin, titanium dioxide powder and anti-solarization modified filler.
The flow auxiliary agent is one or more of nano silicon dioxide, nano aluminum oxide and nano calcium oxide.
The particle size of the talcum powder is 1000-1500 meshes.
The coupling agent is a silane coupling agent.
The stabilizer is an ultraviolet absorbent.
The total amount of the special powder material for the base TPU and the functional filler added during mixing accounts for 50 percent of the total volume of the high-speed mixer.
The raw materials are stirred in a high-speed mixer for 10-40 min.
The antioxidant is one or two of antioxidant 1010 and antioxidant 168.
Example 1
(1) 100 parts by mass of TPU powder, 10 parts by mass of impact-resistant filler, 10 parts by mass of insolation-proof filler, 5 parts by mass of nano-silica, 2 parts by mass of antioxidant, 1 part by mass of stabilizer, 10 parts by mass of talcum powder, 2 parts by mass of coupling agent and 1 part by mass of weather-resistant agent are put into a high-speed mixer and mixed for 15min at a speed of 1200 r/min.
(2) SLS molding standard sample strips, wherein the molding process parameters are as follows: the printing temperature is set to be 110 ℃, the scanning speed is 6000mm/s, the laser power is 25W, the powder spreading thickness is 0.10mm, and the scanning distance is 0.08 mm.
(3) And (4) carrying out performance test on the SLS molded standard sample bar. The method comprises the steps of mechanical property testing (impact strength testing according to GB/T1043-93, spline tensile testing according to GB/T1040-92), density testing and precision testing.
(4) The SLS forming automobile instrument panel is split, and the forming technological parameters are as follows: the printing temperature is 110 ℃, the scanning speed is 6000mm/s, the laser power is 25W, the powder spreading thickness is 0.10mm, and the scanning distance is 0.08 mm.
(5) And carrying out sand blasting, powder cleaning and other treatments on the formed automobile instrument panel in a split manner, and finally splicing to obtain a finished product.
In this experimental example, the anti-solarization filler is the anti-solarization modified filler prepared in the above experiment, the impact-resistant filler is the impact-resistant modified filler prepared in the above experiment, the antioxidant is antioxidant 168, the stabilizer is an ultraviolet absorbent, the coupling agent is a silane coupling agent, and the weather-resistant agent is a polyamine antioxidant reducing agent.
Example 2
(1) 100 parts by mass of TPU powder, 10 parts by mass of impact-resistant filler, 10 parts by mass of insolation-proof filler, 5 parts by mass of nano-silica, 2 parts by mass of antioxidant, 1 part by mass of stabilizer, 10 parts by mass of talcum powder, 2 parts by mass of coupling agent and 1 part by mass of weather-resistant agent are put into a high-speed mixer and mixed for 15min at a speed of 1200 r/min.
(2) SLS molding standard sample strips, wherein the molding process parameters are as follows: the printing temperature is set to be 110 ℃, the scanning speed is 7000mm/s, the laser power is 25W, the powder spreading thickness is 0.10mm, and the scanning interval is 0.10 mm.
(3) And (4) carrying out performance test on the SLS molded standard sample bar. The method comprises the steps of mechanical property testing (impact strength testing according to GB/T1043-93, spline tensile testing according to GB/T1040-92), density testing and precision testing.
(4) The SLS forming automobile instrument panel is split, and the forming technological parameters are as follows: the printing temperature is 110 ℃, the scanning speed is 7000mm/s, the laser power is 25W, the powder spreading thickness is 0.10mm, and the scanning interval is 0.10 mm.
(5) And carrying out sand blasting, powder cleaning and other treatments on the formed automobile instrument panel in a split manner, and finally splicing to obtain a finished product.
In this experimental example, the anti-solarization filler is the anti-solarization modified filler prepared in the above experiment, the impact-resistant filler is the impact-resistant modified filler prepared in the above experiment, the antioxidant is antioxidant 168, the stabilizer is an ultraviolet absorbent, the coupling agent is a silane coupling agent, and the weather-resistant agent is a polyamine antioxidant reducing agent.
Example 3
(1) 100 parts by mass of TPU powder, 10 parts by mass of impact-resistant filler, 10 parts by mass of insolation-proof filler, 5 parts by mass of nano-silica, 2 parts by mass of antioxidant, 1 part by mass of stabilizer, 10 parts by mass of talcum powder, 2 parts by mass of coupling agent and 1 part by mass of weather-resistant agent are put into a high-speed mixer and mixed for 15min at a speed of 1200 r/min.
(2) SLS molding standard sample strips, wherein the molding process parameters are as follows: the printing temperature is set to be 120 ℃, the scanning speed is 7000mm/s, the laser power is 35W, the powder spreading thickness is 0.15mm, and the scanning interval is 0.30 mm.
(3) And (4) carrying out performance test on the SLS molded standard sample bar. The method comprises the steps of mechanical property testing (impact strength testing according to GB/T1043-93, spline tensile testing according to GB/T1040-92), density testing and precision testing.
(4) The SLS forming automobile instrument panel is split, and the forming technological parameters are as follows: the printing temperature is 120 ℃, the scanning speed is 7000mm/s, the laser power is 35W, the powder spreading thickness is 0.15mm, and the scanning interval is 0.30 mm.
(5) And carrying out sand blasting, powder cleaning and other treatments on the formed automobile instrument panel in a split manner, and finally splicing to obtain a finished product.
In this experimental example, the anti-solarization filler is the anti-solarization modified filler prepared in the above experiment, the impact-resistant filler is the impact-resistant modified filler prepared in the above experiment, the antioxidant is antioxidant 168, the stabilizer is an ultraviolet absorbent, the coupling agent is a silane coupling agent, and the weather-resistant agent is a polyamine antioxidant reducing agent.
Example 4
(1) 100 parts by mass of TPU powder, 10 parts by mass of impact-resistant filler, 10 parts by mass of insolation-proof filler, 5 parts by mass of nano-silica, 2 parts by mass of antioxidant, 1 part by mass of stabilizer, 10 parts by mass of talcum powder, 2 parts by mass of coupling agent and 1 part by mass of weather-resistant agent are put into a high-speed mixer and mixed for 15min at a speed of 1200 r/min.
(2) SLS molding standard sample strips, wherein the molding process parameters are as follows: the printing temperature is set to be 120 ℃, the scanning speed is 8000mm/s, the laser power is 20W, the powder spreading thickness is 0.20mm, and the scanning distance is 0.15 mm.
(3) And (4) carrying out performance test on the SLS molded standard sample bar. The method comprises the steps of mechanical property testing (impact strength testing according to GB/T1043-93, spline tensile testing according to GB/T1040-92), density testing and precision testing.
(4) The SLS forming automobile instrument panel is split, and the forming technological parameters are as follows: the printing temperature is 120 ℃, the scanning speed is 8000mm/s, the laser power is 20W, the powder spreading thickness is 0.20mm, and the scanning distance is 0.15 mm.
(5) And carrying out sand blasting, powder cleaning and other treatments on the formed automobile instrument panel in a split manner, and finally splicing to obtain a finished product.
In this experimental example, the anti-solarization filler is the anti-solarization modified filler prepared in the above experiment, the impact-resistant filler is the impact-resistant modified filler prepared in the above experiment, the antioxidant is antioxidant 168, the stabilizer is an ultraviolet absorbent, the coupling agent is a silane coupling agent, and the weather-resistant agent is a polyamine antioxidant reducing agent.
Example 5
(1) 100 parts by mass of TPU powder, 10 parts by mass of impact-resistant filler, 10 parts by mass of insolation-proof filler, 5 parts by mass of nano-silica, 2 parts by mass of antioxidant, 1 part by mass of stabilizer, 10 parts by mass of talcum powder, 2 parts by mass of coupling agent and 1 part by mass of weather-resistant agent are put into a high-speed mixer and mixed for 15min at a speed of 1200 r/min.
(2) SLS molding standard sample strips, wherein the molding process parameters are as follows: the printing temperature is set to 130 ℃, the scanning speed is 8000mm/s, the laser power is 15W, the powder spreading thickness is 0.20mm, and the scanning distance is 0.15 mm.
(3) And (4) carrying out performance test on the SLS molded standard sample bar. The method comprises the steps of mechanical property testing (impact strength testing according to GB/T1043-93, spline tensile testing according to GB/T1040-92), density testing and precision testing.
(4) The SLS forming automobile instrument panel is split, and the forming technological parameters are as follows: printing temperature 130 ℃, scanning speed 8000mm/s, laser power 15W, powder spreading thickness 0.20mm, and scanning distance 0.15 mm.
(5) And carrying out sand blasting, powder cleaning and other treatments on the formed automobile instrument panel in a split manner, and finally splicing to obtain a finished product.
In this experimental example, the anti-solarization filler is the anti-solarization modified filler prepared in the above experiment, the impact-resistant filler is the impact-resistant modified filler prepared in the above experiment, the antioxidant is antioxidant 168, the stabilizer is an ultraviolet absorbent, the coupling agent is a silane coupling agent, and the weather-resistant agent is a polyamine antioxidant reducing agent.
Example 6
(1) 100 parts by mass of TPU powder, 10 parts by mass of impact-resistant filler, 10 parts by mass of insolation-proof filler, 5 parts by mass of nano-silica, 2 parts by mass of antioxidant, 1 part by mass of stabilizer, 10 parts by mass of talcum powder, 2 parts by mass of coupling agent and 1 part by mass of weather-resistant agent are put into a high-speed mixer and mixed for 15min at a speed of 1200 r/min.
(2) SLS molding standard sample strips, wherein the molding process parameters are as follows: the printing temperature is set to 130 ℃, the scanning speed is 9000mm/s, the laser power is 30W, the powder spreading thickness is 0.25mm, and the scanning distance is 0.13 mm.
(3) And (4) carrying out performance test on the SLS molded standard sample bar. The method comprises the steps of mechanical property testing (impact strength testing according to GB/T1043-93, spline tensile testing according to GB/T1040-92), density testing and precision testing.
(4) The SLS forming automobile instrument panel is split, and the forming technological parameters are as follows: the printing temperature is 130 ℃, the scanning speed is 9000mm/s, the laser power is 30W, the powder spreading thickness is 0.25mm, and the scanning distance is 0.13 mm.
(5) And carrying out sand blasting, powder cleaning and other treatments on the formed automobile instrument panel in a split manner, and finally splicing to obtain a finished product.
In this experimental example, the anti-solarization filler is the anti-solarization modified filler prepared in the above experiment, the impact-resistant filler is the impact-resistant modified filler prepared in the above experiment, the antioxidant is antioxidant 168, the stabilizer is an ultraviolet absorbent, the coupling agent is a silane coupling agent, and the weather-resistant agent is a polyamine antioxidant reducing agent.
Example 7
(1) 100 parts by mass of TPU powder, 10 parts by mass of impact-resistant filler, 10 parts by mass of insolation-proof filler, 5 parts by mass of nano-silica, 2 parts by mass of antioxidant, 1 part by mass of stabilizer, 10 parts by mass of talcum powder, 2 parts by mass of coupling agent and 1 part by mass of weather-resistant agent are put into a high-speed mixer and mixed for 15min at a speed of 1200 r/min.
(2) SLS molding standard sample strips, wherein the molding process parameters are as follows: the printing temperature is set to be 140 ℃, the scanning speed is 9000mm/s, the laser power is 40W, the powder spreading thickness is 0.15mm, and the scanning distance is 0.28 mm.
(3) And (4) carrying out performance test on the SLS molded standard sample bar. The method comprises the steps of mechanical property testing (impact strength testing according to GB/T1043-93, spline tensile testing according to GB/T1040-92), density testing and precision testing.
(4) The SLS forming automobile instrument panel is split, and the forming technological parameters are as follows: the printing temperature is 140 ℃, the scanning speed is 9000mm/s, the laser power is 40W, the powder spreading thickness is 0.15mm, and the scanning distance is 0.28 mm.
(5) And carrying out sand blasting, powder cleaning and other treatments on the formed automobile instrument panel in a split manner, and finally splicing to obtain a finished product.
In this experimental example, the anti-solarization filler is the anti-solarization modified filler prepared in the above experiment, the impact-resistant filler is the impact-resistant modified filler prepared in the above experiment, the antioxidant is antioxidant 168, the stabilizer is an ultraviolet absorbent, the coupling agent is a silane coupling agent, and the weather-resistant agent is a polyamine antioxidant reducing agent. Example 8
(1) 100 parts by mass of TPU powder, 10 parts by mass of impact-resistant filler, 10 parts by mass of insolation-proof filler, 5 parts by mass of nano-silica, 2 parts by mass of antioxidant, 1 part by mass of stabilizer, 10 parts by mass of talcum powder, 2 parts by mass of coupling agent and 1 part by mass of weather-resistant agent are put into a high-speed mixer and mixed for 15min at a speed of 1200 r/min.
(2) SLS molding standard sample strips, wherein the molding process parameters are as follows: the printing temperature is set to be 140 ℃, the scanning speed is 10000mm/s, the laser power is 35W, the powder spreading thickness is 0.15mm, and the scanning distance is 0.25 mm.
(3) And (4) carrying out performance test on the SLS molded standard sample bar. The method comprises the steps of mechanical property testing (impact strength testing according to GB/T1043-93, spline tensile testing according to GB/T1040-92), density testing and precision testing.
(4) The SLS forming automobile instrument panel is split, and the forming technological parameters are as follows: printing temperature is 140 ℃, scanning speed is 10000mm/s, laser power is 35W, powder spreading thickness is 0.15mm, and scanning distance is 0.25 mm.
(5) And carrying out sand blasting, powder cleaning and other treatments on the formed automobile instrument panel in a split manner, and finally splicing to obtain a finished product.
In this experimental example, the anti-solarization filler is the anti-solarization modified filler prepared in the above experiment, the impact-resistant filler is the impact-resistant modified filler prepared in the above experiment, the antioxidant is antioxidant 168, the stabilizer is an ultraviolet absorbent, the coupling agent is a silane coupling agent, and the weather-resistant agent is a polyamine antioxidant reducing agent.
Example 9
(1) 100 parts by mass of TPU powder, 10 parts by mass of impact-resistant filler, 10 parts by mass of insolation-proof filler, 5 parts by mass of nano-silica, 2 parts by mass of antioxidant, 1 part by mass of stabilizer, 10 parts by mass of talcum powder, 2 parts by mass of coupling agent and 1 part by mass of weather-resistant agent are put into a high-speed mixer and mixed for 15min at a speed of 1200 r/min.
(2) SLS molding standard sample strips, wherein the molding process parameters are as follows: the printing temperature is set to 150 ℃, the scanning speed is 10000mm/s, the laser power is 15W, the powder spreading thickness is 0.25mm, and the scanning distance is 0.30 mm.
(3) And (4) carrying out performance test on the SLS molded standard sample bar. The method comprises the steps of mechanical property testing (impact strength testing according to GB/T1043-93, spline tensile testing according to GB/T1040-92), density testing and precision testing.
(4) The SLS forming automobile instrument panel is split, and the forming technological parameters are as follows: printing temperature 150 ℃, scanning speed 10000mm/s, laser power 15W, powder spreading thickness 0.25mm, and scanning interval 0.30 mm.
(5) And carrying out sand blasting, powder cleaning and other treatments on the formed automobile instrument panel in a split manner, and finally splicing to obtain a finished product.
In this experimental example, the anti-solarization filler is the anti-solarization modified filler prepared in the above experiment, the impact-resistant filler is the impact-resistant modified filler prepared in the above experiment, the antioxidant is antioxidant 168, the stabilizer is an ultraviolet absorbent, the coupling agent is a silane coupling agent, and the weather-resistant agent is a polyamine antioxidant reducing agent.
Example 10
(1) 100 parts by mass of TPU powder, 10 parts by mass of impact-resistant filler, 10 parts by mass of insolation-proof filler, 5 parts by mass of nano-silica, 2 parts by mass of antioxidant, 1 part by mass of stabilizer, 10 parts by mass of talcum powder, 2 parts by mass of coupling agent and 1 part by mass of weather-resistant agent are put into a high-speed mixer and mixed for 15min at a speed of 1200 r/min.
(2) SLS molding standard sample strips, wherein the molding process parameters are as follows: the printing temperature is set to 150 ℃, the scanning speed is 11000mm/s, the laser power is 40W, the powder spreading thickness is 0.25mm, and the scanning interval is 0.15 mm.
(3) And (4) carrying out performance test on the SLS molded standard sample bar. The method comprises the steps of mechanical property testing (impact strength testing according to GB/T1043-93, spline tensile testing according to GB/T1040-92), density testing and precision testing.
(4) The SLS forming automobile instrument panel is split, and the forming technological parameters are as follows: the printing temperature is 150 ℃, the scanning speed is 11000mm/s, the laser power is 40W, the powder spreading thickness is 0.25mm, and the scanning interval is 0.15 mm.
(5) And carrying out sand blasting, powder cleaning and other treatments on the formed automobile instrument panel in a split manner, and finally splicing to obtain a finished product.
In this experimental example, the anti-solarization filler is the anti-solarization modified filler prepared in the above experiment, the impact-resistant filler is the impact-resistant modified filler prepared in the above experiment, the antioxidant is antioxidant 168, the stabilizer is an ultraviolet absorbent, the coupling agent is a silane coupling agent, and the weather-resistant agent is a polyamine antioxidant reducing agent.
Example 11
(1) 100 parts by mass of TPU powder, 10 parts by mass of impact-resistant filler, 10 parts by mass of insolation-proof filler, 5 parts by mass of nano-silica, 2 parts by mass of antioxidant, 1 part by mass of stabilizer, 10 parts by mass of talcum powder, 2 parts by mass of coupling agent and 1 part by mass of weather-resistant agent are put into a high-speed mixer and mixed for 15min at a speed of 1200 r/min.
(2) SLS molding standard sample strips, wherein the molding process parameters are as follows: the printing temperature is set to be 140 ℃, the scanning speed is 11000mm/s, the laser power is 45W, the powder spreading thickness is 0.10mm, and the scanning interval is 0.15 mm.
(3) And (4) carrying out performance test on the SLS molded standard sample bar. The method comprises the steps of mechanical property testing (impact strength testing according to GB/T1043-93, spline tensile testing according to GB/T1040-92), density testing and precision testing.
(4) The SLS forming automobile instrument panel is split, and the forming technological parameters are as follows: the printing temperature is 140 ℃, the scanning speed is 11000mm/s, the laser power is 45W, the powder spreading thickness is 0.10mm, and the scanning interval is 0.15 mm.
(5) And carrying out sand blasting, powder cleaning and other treatments on the formed automobile instrument panel in a split manner, and finally splicing to obtain a finished product.
In this experimental example, the anti-solarization filler is the anti-solarization modified filler prepared in the above experiment, the impact-resistant filler is the impact-resistant modified filler prepared in the above experiment, the antioxidant is antioxidant 168, the stabilizer is an ultraviolet absorbent, the coupling agent is a silane coupling agent, and the weather-resistant agent is a polyamine antioxidant reducing agent.
Example 12
(1) 100 parts by mass of TPU powder, 10 parts by mass of impact-resistant filler, 10 parts by mass of insolation-proof filler, 5 parts by mass of nano-silica, 2 parts by mass of antioxidant, 1 part by mass of stabilizer, 10 parts by mass of talcum powder, 2 parts by mass of coupling agent and 1 part by mass of weather-resistant agent are put into a high-speed mixer and mixed for 15min at a speed of 1200 r/min.
(2) SLS molding standard sample strips, wherein the molding process parameters are as follows: the printing temperature is set to be 140 ℃, the scanning speed is 12000mm/s, the laser power is 15W, the powder spreading thickness is 0.30mm, and the scanning interval is 0.30 mm.
(3) And (4) carrying out performance test on the SLS molded standard sample bar. The method comprises the steps of mechanical property testing (impact strength testing according to GB/T1043-93, spline tensile testing according to GB/T1040-92), density testing and precision testing.
(4) The SLS forming automobile instrument panel is split, and the forming technological parameters are as follows: the printing temperature is 140 ℃, the scanning speed is 12000mm/s, the laser power is 15W, the powder spreading thickness is 0.30mm, and the scanning interval is 0.30 mm.
(5) And carrying out sand blasting, powder cleaning and other treatments on the formed automobile instrument panel in a split manner, and finally splicing to obtain a finished product.
In this experimental example, the anti-solarization filler is the anti-solarization modified filler prepared in the above experiment, the impact-resistant filler is the impact-resistant modified filler prepared in the above experiment, the antioxidant is antioxidant 168, the stabilizer is an ultraviolet absorbent, the coupling agent is a silane coupling agent, and the weather-resistant agent is a polyamine antioxidant reducing agent.
Effect verification
The SLS samples obtained by performing the performance tests of examples 1 to 12 described above according to the following criteria were subjected to the mechanical property test results shown in Table 1.
The impact strength was tested according to GB/T1043-93. The length of the sample is 80mm, the width is 10mm, and the gap is an I-shaped gap of 0.25 mm.
The tensile test of the bars was carried out according to GB/T1040-92. The test sample is a dumbbell type sample, the total length of the sample is 150mm, the distance between clamps is 115mm, the gauge length is 50mm, and the stretching speed is 50 mm/min.
All samples were thermostated at 25 ℃ for 24 hours before testing. The test temperature was 25 ℃.
TABLE 1 results of mechanical Properties test of standard samples of examples
The SLS sample density and accuracy test results obtained for each example are shown in Table 2.
Table 2 results of measuring density and molding accuracy of standard sample of each example
The invention has many applications, and the above description is only a preferred embodiment of the invention. It should be noted that the above examples are only for illustrating the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications can be made without departing from the principles of the invention and these modifications are to be considered within the scope of the invention.
Claims (10)
1. A manufacturing process of a TPU-based high-performance automobile instrument panel is characterized by comprising the following steps: the method comprises the following steps:
(1) selecting industrial-grade equipment suitable for Selective Laser Sintering (SLS) of polymer materials for forming;
(2) designing a split three-dimensional model of each assembled automobile instrument panel, converting the model into an STL file format, slicing and dividing the cross section of the STL file, and importing the STL file into an SLS (selective laser sintering) computer-aided system;
(3) preparing impact-resistant anti-exposure functional TPU composite powder;
(4) setting SLS technological parameters, wherein the printing temperature is 110-150 ℃, the scanning speed is 6000 mm/s-12000 mm/s, the laser power is 15-45W, the powder spreading thickness is 0.10-0.30 mm, and the scanning interval is 0.08-0.30 mm;
(5) filling the TPU composite powder into SLS equipment, and forming a standard sample strip through SLS;
(6) performing performance tests on the formed standard sample strip, wherein the performance tests comprise mechanical performance tests, density tests and precision tests;
(7) and SLS molding the automobile instrument panel split body, performing sand blasting, powder cleaning and other treatments on the molded automobile instrument panel split body, and finally assembling to obtain a finished product.
2. The process of manufacturing a TPU-based high performance automotive instrument panel as set forth in claim 1 wherein: the impact-resistant anti-exposure functional TPU composite powder comprises the following components:
(1) 100 parts of TPU powder;
(2) 10-30 parts by mass of impact-resistant filler, preferably 10-20 parts by mass;
(3) 10-30 parts by mass of a sun exposure preventing filler, preferably 10-20 parts by mass;
(4) 2-10 parts by mass of a flow aid, preferably 5-10 parts by mass;
(5) 0.1-1.5 parts by mass of a stabilizer;
(6) 2-5 parts by mass of an antioxidant;
(7) 5-15 parts by mass of talcum powder, preferably 5-10 parts by mass;
(8) 2-5 parts by mass of a coupling agent;
(9) 0.1 to 1.5 parts by mass of a weather resistant agent, preferably 0.1 to 1 part by mass;
the preparation method of the impact-resistant anti-exposure functional TPU composite powder is characterized by adding the components into a high-speed mixer in proportion and mechanically mixing for 10-40 min to obtain the impact-resistant anti-exposure functional TPU composite powder, wherein the total volume of the powder accounts for 50% of the volume of the high-speed mixer.
3. The process of manufacturing a TPU-based high performance automotive instrument panel as set forth in claim 1 wherein: the automobile instrument panel is split, and the inner core is of a hollow structure.
4. The process of manufacturing a TPU-based high performance automotive instrument panel as set forth in claim 2 wherein: the impact-resistant filler is one or more of glass fiber, mica powder, aluminum powder, nano silicon dioxide and impact-resistant modified filler.
5. The process of manufacturing a TPU-based high performance automotive instrument panel as set forth in claim 2 wherein: the anti-solarization filler is one or more of asbestos powder, silica gel powder, phenolic resin, titanium dioxide powder and anti-solarization modified filler.
6. The process of manufacturing a TPU-based high performance automotive instrument panel as set forth in claim 2 wherein: the flow auxiliary agent is one or more of nano silicon dioxide, nano aluminum oxide and nano calcium oxide.
7. The process of manufacturing a TPU-based high performance automotive instrument panel as set forth in claim 2 wherein: the particle size of the talcum powder is 1000-1500 meshes.
8. The process of manufacturing a TPU-based high performance automotive instrument panel as set forth in claim 2 wherein: the coupling agent is a silane coupling agent.
9. The process of manufacturing a TPU-based high performance automotive instrument panel as set forth in claim 2 wherein: the stabilizer is an ultraviolet absorbent.
10. The process of manufacturing a TPU-based high performance automotive instrument panel as set forth in claim 2 wherein: the antioxidant is one or two of antioxidant 1010 and antioxidant 168.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010926220.2A CN112157909A (en) | 2020-09-07 | 2020-09-07 | Manufacturing process of TPU (thermoplastic polyurethane) -based high-performance automobile instrument panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010926220.2A CN112157909A (en) | 2020-09-07 | 2020-09-07 | Manufacturing process of TPU (thermoplastic polyurethane) -based high-performance automobile instrument panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112157909A true CN112157909A (en) | 2021-01-01 |
Family
ID=73857454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010926220.2A Pending CN112157909A (en) | 2020-09-07 | 2020-09-07 | Manufacturing process of TPU (thermoplastic polyurethane) -based high-performance automobile instrument panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112157909A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113715327A (en) * | 2021-08-02 | 2021-11-30 | 华东理工大学 | 3D printing manufacturing process of TPU flexible heat-conducting automobile seat liner material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103709737A (en) * | 2013-12-05 | 2014-04-09 | 吴江中瑞机电科技有限公司 | High-molecular composite powder material for SLS and preparation method therefor |
| CN104211848A (en) * | 2014-09-02 | 2014-12-17 | 江苏科利新材料有限公司 | Preparation method of N-phenyl maleimide heat-resistant modifier |
| CN105985632A (en) * | 2015-10-28 | 2016-10-05 | 合肥学院 | Powder material for selective laser sintering and preparation method thereof |
| CN109233272A (en) * | 2018-09-27 | 2019-01-18 | 盱眙欧佰特粘土材料有限公司 | Nylon/attapulgite/carbon fiber composite granule and preparation method thereof and the application in Selective Laser Sintering |
| CN109265746A (en) * | 2018-09-14 | 2019-01-25 | 蚌埠创特新材料科技有限公司 | It is a kind of for improving the preparation method of the compounded mix of plastics shock resistance |
-
2020
- 2020-09-07 CN CN202010926220.2A patent/CN112157909A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103709737A (en) * | 2013-12-05 | 2014-04-09 | 吴江中瑞机电科技有限公司 | High-molecular composite powder material for SLS and preparation method therefor |
| CN104211848A (en) * | 2014-09-02 | 2014-12-17 | 江苏科利新材料有限公司 | Preparation method of N-phenyl maleimide heat-resistant modifier |
| CN105985632A (en) * | 2015-10-28 | 2016-10-05 | 合肥学院 | Powder material for selective laser sintering and preparation method thereof |
| CN109265746A (en) * | 2018-09-14 | 2019-01-25 | 蚌埠创特新材料科技有限公司 | It is a kind of for improving the preparation method of the compounded mix of plastics shock resistance |
| CN109233272A (en) * | 2018-09-27 | 2019-01-18 | 盱眙欧佰特粘土材料有限公司 | Nylon/attapulgite/carbon fiber composite granule and preparation method thereof and the application in Selective Laser Sintering |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113715327A (en) * | 2021-08-02 | 2021-11-30 | 华东理工大学 | 3D printing manufacturing process of TPU flexible heat-conducting automobile seat liner material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110757722B (en) | Forming method of thermoplastic continuous fiber reinforced composite material part | |
| CN100411843C (en) | Multipurpose polymer forming machine | |
| CN109501107B (en) | Low-density high-foaming-rate polymer foam material and preparation method thereof | |
| CN102294830B (en) | Method for manufacturing thermoplastic fibre reinforced building template | |
| CN112063032B (en) | Wood-plastic composite material for 3D printing and preparation method and application thereof | |
| CN112157909A (en) | Manufacturing process of TPU (thermoplastic polyurethane) -based high-performance automobile instrument panel | |
| CN111117028A (en) | High-density pearl cotton and preparation method thereof | |
| CN110862673A (en) | Foaming thermoplastic elastomer material for 3D printing and preparation method thereof | |
| CN111267327A (en) | Skin stretch forming die and manufacturing method thereof | |
| CN110549707B (en) | Foamed polypropylene composite sheet and preparation method thereof | |
| CN108948623A (en) | A kind of auto sound energy-absorbing interior trim fretting map polyester alloy plastics and preparation method thereof | |
| CN101266788B (en) | A compound material shell sound reflection board and its making method | |
| CN106891589A (en) | A kind of composite for engine hood of passenger train and preparation method thereof | |
| CN112063155A (en) | Special functional TPU powder for SLS forming impact-resistant and insolation-proof automobile instrument panel and preparation method thereof | |
| CN115216088A (en) | Lightweight modification method of plastic and modified product | |
| CN110624225B (en) | Racket | |
| CN112092363A (en) | Selective laser sintering forming process of heat-resistant flame-retardant polypropylene automobile intake manifold | |
| CN107042624A (en) | The preparation method of automobile spoiler | |
| CN103275393A (en) | Glass fiber composite material applied to thin-walled part and preparation method thereof | |
| CN105504754A (en) | Microcellular foam polycarbonate box and preparation method thereof | |
| CN112662125A (en) | High-strength pressure-resistant notebook computer cover and injection molding process thereof | |
| CN113183375A (en) | Method for manufacturing crystal ecological plate containing three-dimensional inner ornaments | |
| CN110733209A (en) | engineering plastic and alloy composite plastic template and preparation method thereof | |
| CN219007096U (en) | Die for molding high-performance thermoplastic composite material thick plate | |
| CN113072790B (en) | Polydicyclopentadiene composite material for testing tool and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |