热塑性片状模塑料（Thermoplastic sheet molding compound）

1、热塑性片状模塑料（Thermoplastic sheet molding compound）This article is contributed by neiyunPpt documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view.The thirteenth chapter is thermoplastic sheet molding compound13 t

2、hermoplastic sheet molding plastics and their products stamping forming process1.1 definitionsCoursewareIt is a continuous glass fiber felt, it is a continuous glass fiber mat, chopped glass fiber felt, cloth, roving and thermoplastic resin composite of a sheet mold plastic. Sheet molding compound.1

3、3.1.1 13.1.1 overviewThermoplastic sheet molding processing products - sheet stamping forming process of preheating material preheating; stamping; thermoplastic sheet molding processing products and process sheet stamping die preheating thermosetting sheet of plastic processing products - hot formin

4、g process. Hot pressing. Thermosetting plastic sheet molding processing products and process of hot press molding thermoplastic sheet molding plastic products and product characteristics: thermosetting thermoplastic sheet molding plastic products and thermosetting products characteristics: 1) is 1 h

5、igher than the ratio of strength to strength) plastic sheet molding high strength and the hand glass steel is similar to that of table 1313 thermoplastic of SMC strength and GRP similar, see table 13-2 density density (1.1 (1.1 1.6 g/cm3) strength thermosetting products are shown in table 1313 and t

6、hermoplastic, 1.6 1.6 density strength thermosetting products are shown in table 13-2, when compared with thermoplastic, density of 1.6 2 g/cm3The thirteenth chapter is thermoplastic sheet molding compoundCourseware2) can repeat processing molding 2) can repeat processing, forming, corner, waste mat

7、erials, waste, etc. can be repeated processing, save materials, reduce costs. Edges, leftover materials and waste materials can be repeatedly processed to save materials and reduce costs. 3) 3) short molding cycle short molding cycle SMC thermosetting molding cycle 6 SMC molding cycle SMC thermosett

8、ing molding cycle 6 15min SMC thermoplastic molding cycle 20 SMC molding cycle 20 thermoplastic molding cycle SMC 20 60s high production efficiency, easy to realize automation and mechanization of production. High production efficiency, easy to realize automation, mechanization production. 4) 4) low

9、 pressure molding molding pressure low plastic sheet molding stamping pressure 3 8MPa thermosetting sheet molding plastic molding pressure of 3 5 15MPa) long storage period 5) long storage period of thermoplastic sheet molding can be stored for more than a few years; thermoplastic sheet molding can

10、be stored for more than a few years thermosetting plastic sheet molding; can be stored for 3 months (at room temperature) thermosetting sheet molding can be stored for 3 months (at room temperature)13.1.1 13.1.1 overviewThe thirteenth chapter is thermoplastic sheet molding compoundCourseware6) than

11、thermosetting glass steel has high resistance to chemical corrosion, 6) than thermosetting glass steel has high resistance to chemical corrosion and water glass than thermosetting steel has high chemical corrosion resistance and air tightness of 7) sufficient raw materials cheap, low cost (about 20

12、lower than the hand with the original) sufficient material, 20%7) abundant raw materials, low price, low cost (about 20% lower than with the hand) 8) 8) a high degree of mechanization degree of mechanization of high plastic CM must adopt mechanized production, stable quality. CM must be mechanized a

13、nd thermoplastic CM must be mechanized and stable in quality. 9) 9) one-time investment of equipment equipment investment hot SMC and comparison of plastic injection molding thermoplastic CM heat: comparison of plastic injection molding of thermoplastic SMC and CM: compared with SMC and injection mo

14、lding of thermoplastic CM high strength and rigidity; (1), with strong high stiffness and good anti impact performance; (2), good anti impact performance; high precision products; (3), high precision products; products of small size made by injection molding (a short fiber reinforced) (4), the produ

15、ct size is small by injection molding (a short fiber reinforced) for larger products, can be molded by stamping (a continuous fiber reinforced) for larger products,It can be made by stamping (continuous fiber reinforcement)13.1.1 13.1.1 overviewThe thirteenth chapter is thermoplastic sheet molding c

16、ompound(5) the molding pressure is smaller, and the requirement of mould and press is lower than injection molding. The requirement of mould and press is lower than injection molding.Courseware13.1.1 13.1.1 overviewCompared with steel: compared with steel: light weight, small density; (1) light weig

17、ht, low density (2); corrosion resistance; corrosion resistance; shape design, shape design (3) is good, can be a molding of complex products (4) than the steel production less investmentThe thirteenth chapter is thermoplastic sheet molding compound1.2 basic properties of fiber reinforced thermoplas

18、tic composites 13.1.2 high performance compositeHigh performance composites; fiber reinforced thermoplastic composites; general purpose composites; 2.1 high performance composite materialsCoursewareWith carbon fiber, with carbon fiber, aramid fiber and high strength glass fiber reinforced polyethere

19、therketone (PEEK), poly (PEK) polyphenylene sulfide (PPS) and other high performance resin etc. (PEK), (PPS) high performance resin (PEEK), poly (PEK) and polyphenylene sulfide (PPS) and other high performance resin etc. 1, the use of high temperature (260 DEG C), thermosetting CM using a temperatur

20、e below 200 DEG C high temperature (260 DEG C), thermosetting CM using a temperature below 200 DEG C (260 DEG C) CM temperature is lower than 2, the carbon fiber reinforced thermoplastic composite material of low densityThe thirteenth chapter is thermoplastic sheet molding compound13.1.3 universal t

21、hermoplastic composite2.2 general purpose thermoplastic composites refer to glass fiber reinforced polypropylene and polyethylene, which refer to glass fiber reinforced polypropylene, polyethylene, nylon and other general FRTP FRTPCoursewareThe thirteenth chapter is thermoplastic sheet molding compo

22、undProcess and equipment for producing 13.13.2 thermoplastic sheet molding compoundLayer method, dry process, dispersion method, wet water dispersion method, WT method, foam dispersion method, WT method (foam dispersion method)Courseware13.2.1 universal thermoplastic compositeFigure 13.1 manufacturi

23、ng methods of thermoplastic sheet molding compoundsThe thirteenth chapter is thermoplastic sheet molding compound1 raw materialsCourseware(1) resin, nylon, polyethylene, PVC and polypropylene etc. (1) resin, nylon, polyethylene, PVC and polypropylene etc. Only polypropylene and modified polypropylen

24、e resins are currently used for production. Only polypropylene and modified polypropylene resins are used for the production.13.2.2 13.2.2 raw materialsPolypropylene has the advantages of small density; good impact resistance; polypropylene has the advantages of: (1) low density (2); good impact res

25、istance; (3) the use of a wide range of temperature of -40 to 100 DEG C good technology, the use of a wide range of temperature of -40 to 100 DEG C; (4) good technology, flow in the melting conditions, impregnation of glass fiber good liquidity thawing condition is good, good impregnation of glass f

26、iber, after cooling rapidly solidified, thus the production efficiency is high; wide material source, low price. The production efficiency is high; (5) material sources are wide and prices are low. (2) reinforcing material (2) reinforcement material for glass fiber roving, fiberglass mat, glass fibe

27、r roving, fiberglass mat, continuous glass fiber mat and continuous glass fiber sizing agent is acupuncture has the difference, mat etc. Its just that the wetting agent makes a difference. (the glass fiber can be strongly bonded to polypropylene) and the fibers can be strongly bonded to the polyprop

28、ylene.The thirteenth chapter is thermoplastic sheet molding compound13.2.3 dry process technology and equipment2, dry process and equipment (1) layer of legitimate production of thermoplastic sheet molding plastic (1) layer, the production of thermoplastic sheet molding plasticCoursewareThe continuo

29、us glass fiber mat and polypropylene (or other thermoplastics) is a continuous glass fiber mat and polypropylene (or other thermoplastic laminated sheet), through heating, pressurizing, impregnation, sheet laminated, after heating and pressurizing, dipping, cooling and cutting process sheet molding.

30、 Method for producing sheet molding plastics in cutting process. Advantages of extrusion machine optional plate machine optional, powder resin directly spread into the mat, easy to soak the fiber. Inside, easy to soak fiber.The thirteenth chapter is thermoplastic sheet molding compound213467Coursewa

31、re13.2.3 dry process technology and equipment13289Five1- plastic extrusion machine; 2- glass fiber; 3- sheet; 4- for plastic extrusion machine; glass fiber; plastic sheets; pressure; heating and cooling facilities; extrusion device; pressure; 5- heating and extruding device; 6- cooling facilities; 7

32、- composite material; cutting machine; 8- amputator; 9- finished productThe thirteenth chapter is thermoplastic sheet molding compound(2) the process of producing sheet molding plastics by dispersion (2) dispersing process to produce sheet molding plasticsCourseware13.2.3 dry process technology and

33、equipmentChopped glass fiber and polypropylene or nylon resin powder in special blender mixing, then according to the design thickness is spread evenly, but the blender mixing, then according to the design thickness is spread evenly, and then heated and pressed into tablet form plastic mold. Then, t

34、he molding plastics are pressed. Advantages: 1) reinforced materials a wide range of advantages: 1) enhance a wide range of materials 2) fiber content at 20 40%2) fiber content control in 20 to 40% in 203) fiber content of fiber layer can choose any direction 3) fiber orientation can be arbitrarily

35、selectedThe thirteenth chapter is thermoplastic sheet molding compoundWet process for producing 13.3.1 sheet molding compound1, with short cut fiber, resin powder and water or foam with short fiber suspensions, mixed slurry 2, fiber content is 20 70% fiber content up to 20 203, the thickness of the

36、product is 1.27 6.35mm thickness is 1.27 1.273 thermoplastic sheet molding wet production processCourseware50mm (glass fiber roving cut into 7 50mm (optimal length is about 13mm) short fiber, about mm 13mm) short fiber, in a blender and powdered resin mixing with water into a slurry suspension uniform, pump to deliver them to the transmission network, a slurry su