PVC
Injection Molding Machine

Let’s take a look at our PVC Injection Molding Machine.
Including the PVC Pipe Fitting Production Line.

PVC Machine

Pipe Fitting Injection Molding Machines

The melted PVC with high viscosity and is easy to decompose. And the decomposition has a corrosive effect on iron. Tekwell’s Pipe fitting injection molding machines with special plasticizing parts and temperature control systems, includes

Screw& barrel set special for UPVC
Screw with chrome-plating, high corrosion resistance
Barrel with cooling fans to adjust the temperature of melting UPVC material
Special design for screw structure(UVPV powder)
Optimized design for machine safety door – Upgraded hydraulic motor with high torque
Upgraded motor and pump
Multi core pullers

Tips For Production Parameters Setting

Melting temperature: ranging from 185-205℃

The exact melting temperature of UPVC can be known from the smoothness of the injected material. If the material is rough and uneven after injection, it proves that the material is not uniform (insufficient plasticization), indicating that the set temperature is too low; if there is foam and a lot of smoke after injection, it indicates that the temperature is too high.

Injection speed

It must be slow, otherwise excessive shearing will degrade the material.

Back pressure

It is determined according to the molding cycle time. The screw surface speed should not exceed 0.15-0.2m/s.

Injection speed

It is up to 150bar, the lower the better, usually 5bar.

Retention time

At a temperature of 200 °C, the retention time of the barrel should not exceed 5 minutes at most. When the temperature is 210 ℃, the barrel retention time cannot exceed 3 minutes.

Brief Introduction

PVC

The melted PVC with high viscosity and poor fluidity. Even if the injection pressure and melt temperature are increased, the fluidity does not change much. In addition, the molding temperature of the resin is very close to the thermal decomposition temperature, making it difficult to mold.

1. Treatment of plastic: with water absorption less than 0.02%, no need to dry it. If dry, put them into a dryer at 80°C for 1-1.5 hours.

2. Percentage of recycled material is no more than 20%.