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  4. Common problems and solutions in the pro...

Common problems and solutions in the production of PVC wood-plastic building templates

Common problems and solutions in the production of PVC wood-plastic building templates

1. Yellow surface

a Insufficient stable dose

Increase the number of stabilizers

b Insufficient external slip and high friction, causing material decomposition

Increase the number of external slip agents

c Temperature setting is too high

Reduce the temperature

2. The middle of the surface of the plate yellows

a The mold local temperature is set high

Lower the temperature

b Insufficient external slip

Increase the number of external lubricants

c Extruder 5 zone high temperature

Lower the temperature

3. Uneven plate thickness

a Unreasonable gap in the die lips

Adjust the thickness of die lips

b Improper adjustment of choke block

Adjust the choke block

c Excessive slippage

Reduce the number of slippage

d Insufficient internal slip

Increase the number of internal slips

e Unreasonable mold temperature setting

Adjust the mold temperature

4. The plate is brittle

a The temperature setting of the extruder is too high

Reduce the temperature

b The temperature setting of the extruder is too low

increase temperature

c Unreasonable formula

Adjust the recipe

5. The surface of the plate is not smooth

a Insufficient external slip

Increase the number of external slip agents

b Insufficient processing aids

Increase the number of processing aids

c Insufficient dispersion of fillers or additives

Adjust the number of fillers or additives

d Mold temperature setting is too low

Increase mold temperature

e The temperature setting of the extruder is too low

Increase extruder temperature

f The temperature of the extruder and die is set too high

Reduce the temperature

6. There are stripes perpendicular to the extrusion direction

a The viscosity of the foaming regulator is too high

Adjust the brand of foam regulator

b The temperature setting of the extruder is too low

Increase extruder temperature

c Mold temperature setting is too low

Increase mold temperature

d Towing speed is too fast

Reduce traction speed

7. There are big bubbles in the plate

a Insufficient melt strength

Increase the amount of foam regulator

b Extruder 5 zone temperature is too high

Lower the temperature

c The mold temperature at the corresponding place is too high

Lower the temperature

e has impurities

Pay attention to raw material impurities

f Large return block

Regrind

g screw wear

Replace the screw

8. Curved surface (free foam)

a Unreasonable temperature setting of three rollers

Adjust the three-roller temperature setting

b The temperature difference inside the plant is large or the air convection is too fast

Improve plant environment

9. The foaming sheet has large cells

a The extruder temperature is set high

Reduce the temperature

b Low foaming adjustment dose

Increase the amount of foaming regulator

c Improper lubrication adjustment

Adjust lubricant ratio

10. The thickness of the board is not easy to control and moves back and forth

a Too much slippage

Reduce the amount of external slip agent

b Unstable mold temperature

Calibrate the thermometer to improve the control accuracy

c Screw wear

Replace the screw

11. The core of the sheet has large pores and small surface pores

a High host temperature

Reduce the host temperature

b Improper lubrication adjustment

Adjust lubricant ratio

c Insufficient melt strength

If you want to know more about it please do not hesitate to contact me. WhatsApp:+86-15966835076.


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    • PLASTIC ROOF TILE MACHINE
    • GEOMEMBRANE WATERPROOF MEMBRANE PRODUCTION LINE
    • HIGH SPEED FILM BLOWING MACHINE
    • PVC WIDE WIDTH FLOOR LEATHER MACHINERY
    • PLASTIC CUSHION MAT(CARPET)EXTRUSION LINE
    • CAST FILM MACHINE
    • EPE FOAM SHEET(FILM) EXTRUSION LINE
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    • XPS FOAM BOARD MACHINE
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  • PLASTIC PROFILE MACHINE
    • PE WPC OUTDOOR PRODUCT MACHINE
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    • PVC OUTDOOR SIDING BOARD PRODUCTION LINE
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    • PP、PE、PVC、PC、ABS PROFILE EXTRUSION MACHINE
  • PLASTIC PIPE MACHINE
    • PVC FIBER REINFORCED PIPE MACHINE
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    • COD CABLE BUNDLE TUBE PRODUCTION LINE
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    • ALUMINUM-PLASTIC COMPOSITE PIPE PRODUCTION LINE
    • PEX/PERT HEAT-RESISTANT FLOOR HEATING PIPE MACHINE
    • PE PRESTRESSED CORRUGATED PIPE MACHINE
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    • PE AERATION TUBE MACHINE
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  • PET PP PE STRAPPING BAND MACHINE
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  • RECYCLED PLASTIC GRANULATION MACHINE
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    • PE PP WPC GRANULE MAKING MACHINE
  • THE POLYMER MATTRESS CUSHION PILLOW MACHINE
  • BIODEGRADABLE PLASTICS MACHINERY
  • PLASTIC EXTRUSION AUXILIARY MACHINE
  • PLASTIC EXTRUDER
  • LAMINATING AND HOT STAMPING MACHINE
  • BOARD PROFILE UV PAINTING MACHINE
  • PLASTIC MONOFILAMENT MACHINE
  • PLASTIC NET MACHINE
  • MELTBLOWN CLOTH MACHINE
  • PLASTIC PRODUCT
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    • N95 KN95 FACE MASK MACHINE
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