熱塑性片狀模塑料(Thermoplasticsheetmoldingcompound)

1、熱塑性片狀模塑料（Thermoplastic sheet molding compoundThis article is contributed by neiyunPpt documents mayexperience poor browsing on the WAPside. It is recommendedthat you first select TXT, or download the source file to the local view.The thirteenth chapter is thermoplastic sheet molding compound13 therm

2、oplastic 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.13.1.

3、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 forming pr

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

5、 than the ratio of strength to strength) plastic sheet molding high strength and the hand glass steel is similar to that of table 1313thermoplastic 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 thermop

6、lastic, 1.6 1.6 density strength thermosetting products are shownin table 13-2, when compared with thermoplastic, density of 1.6 2 g/cm3The thirteenth chapter is thermoplastic sheet molding compound Courseware2) can repeat processing molding 2) can repeat processing, forming, corner, waste materials

7、, 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 thermosetting mo

8、lding 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 press

9、ure 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 morethan a few years; thermoplastic sheet molding can be stor

10、ed for more than a few years thermosetting plastic sheet molding; can be stored for 3 months (at room temperature) thermosettingsheet 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 thermos

11、etting 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 lower th

12、an 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 and therm

13、oplastic CM must be mechanized and stable in quality. 9) 9) one-time investment of equipment equipment investment hot SMCand comparison of plastic injectionmoldingthermoplastic CMheat: comparison of plastic injectionmoldingof thermoplastic SMC and CM: compared with SMC and injection molding of therm

14、oplastic 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 product size is smal

15、l 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 compound(5) the m

16、olding 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 weight, low density

17、(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 thermoplastic composites 1

18、3.1.2 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 polyetheretherketone (PEEK

19、), 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 temperature below 200 DEG

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

21、ite2.2 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 compoundProcess and equi

22、pment for producing 13.13.2 thermoplastic sheet molding compoundLayer method, dry process, dispersion method, wet waterdispersion method, WTmethod, foam dispersion method, WTmethod (foam dispersion method)Courseware13.2.1 universal thermoplastic compositeFigure 13.1 manufacturing methods of thermopl

23、astic sheet molding compoundsThe thirteenth chapter is thermoplastic sheet molding compound1 raw materialsCourseware(1) resin, nylon, polyethylene, PVCand polypropylene etc. (1) resin, nylon, polyethylene, PVC and polypropylene etc. Only polypropylene and modified polypropylene resins are currently

24、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 resistance; (3) the use of

25、 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 ofglass fiber good liquidity thawing condition is good, good impregnation of glass fiber, after cooling rapi

26、dly 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 fiber roving, fiberglass mat

27、, continuous glass fiber mat and continuous glass fiber sizing agent is acupuncture has the difference,mat etc. It's just that the wetting agent makesa difference. (the glass fiber can be strongly bonded to polypropylene) and the fibers can be strongly bonded to the polypropylene.The thirteenth

28、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 continuous glass fiber mat an

29、d 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. Method for producing

30、 sheet molding plastics in cutting process. Advantages of extrusion machine "optional" plate machine "optional", powder resin directlyspread into the mat, easy to soak the fiber. Inside, easy to soak fiber.The thirteenth chapter is thermoplastic sheet molding compound213467Course

31、ware13.2.3 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- coolingfacilities; 7-

32、 composite material; cutting machine; 8-amputator; 9- finished productThe thirteenth chapter is thermoplastic sheet molding compound2) ) the process of producing sheet molding plastics by dispersion (2) dispersing process to produce sheet molding plasticsCourseware13.2.3 dry process technology and e

33、quipmentChoppedglass 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, the

34、 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 se

35、lectedThe 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 pro

36、duct is 1.27 6.35mmthickness 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