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Pvc Pipe Fitting Injection Molding Machine
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Pvc Pipe Fitting Injection Molding Machine

PVC pipe fitting injection molding machine is a machine for producing pipe fittings of various shapes,A pipe fitting is a part that connects a pipe into a pipe run.

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Product Description

PVC pipe fitting injection molding machine is a machine for producing pipe fittings of various shapes,A pipe fitting is a part that connects a pipe into a pipe run.

Pvc Pipe Fitting Injection Molding Machine

PVC Pipe fitting injection molding machine parameter

Technical parameter

GF200EH

Screw Diameter

mm

45

50

55

Screw L/D Ratio

L/D

22.2

20

18.2

Max. Shot Weight(PS)

g

362

446

540

Injection Pressure

MPa

253

205

169

Screw Torque & Speed

rpm

0-190

Clamping Force

kN

2000

Opening Stroke

mm

490

Space Between Tie Bars (H*V)

mm

534X534

Max. Mold Height

mm

600

Min. Mold Height

mm

170

Ejector Stroke

mm

160

Ejector Force

kN

61

Hvdaulic System Pressure

MPa

16

Pump Motor Power

kW

21

Heater Power

kW

15

Oil Tank Capacity

L

320

Machine Dimensions(approx.)(L*W*H)

M

5.6X1.6X2.4


What is the injection molding process for PVC pipe fitting injection molding machine?

The heat source for melting PVC raw materials comes from two aspects, namely, the shear heat of plastic generated by screw motion and the resistance wire heating of the outer wall of the barrel, which is mainly the shear heat of screw motion, and the outer heating of the barrel is mainly the heat source provided when the PVC pipe fitting injection molding machine is started. Due to the poor heat conduction performance of PVC, although foreign plastics have been heated, the intermediate material is still in the condensed state, and even the peripheral part has been overheated and decomposed, and there may be unmelted parts inside. For all kinds of reasons, full attention must be paid to product design, mold design and injection molding process, especially the PVC special injection molding machine of excellent manufacturers, so as to produce ideal products.


PVC pipe fitting injection molding machine the following matters shall be noted in the injection molding process:

1. The back pressure shall be controlled at about 1MPa. Excessive back pressure will produce excessive shear force and overheat and decompose PVC. At the same time, multi-stage back pressure control shall be adopted in the glue melting process. At the beginning, the effective length of the screw is long and the back pressure should be low. With the decrease of the effective length of the screw, the back pressure should be appropriately increased to compensate for the decrease of heat. For a short period before the end of material return, the back pressure shall be reduced to prevent salivation leakage.

2. The PVC pipe fitting injection molding machine screw speed shall vary with different diameters. Generally, if the diameter is less than 60mm, the speed is 50-70rpm; If the diameter is > 70mm, the rotating speed is 20-50rpm to prevent PVC degradation due to excessive shear force.

3. In order to inject the plastic into the inspection cavity, the speed of each place is uniform. Generally, the injection speed should be controlled in multiple stages. The principle is to start the injection slowly. The injection rate must be increased with the gradual increase of the molding area. Until there are no cracks and shrinkage marks, the injection cannot be too fast to prevent the surface of the product from becoming denuded.

4. The temperature of the barrel during injection shall be controlled between 170-190 ℃. When the barrel temperature reaches the set temperature, the blower shall be started to cool down. When the temperature needs to rise, the blowing heating shall be stopped to prevent PVC from overheating and deterioration.


Due to the special performance of PVC, what should be paid attention to when using a special PVC pipe fitting injection molding machine for production?


1. The length diameter ratio of screw shall be 20:1, and the compression ratio shall be between 1:1.6-1:1.2.

2. The screw and nozzle shall be specially made of PVC and the surface shall be chrome plated.

3. Injection pressure, speed, back pressure and temperature can be controlled in multiple levels and precision. (the four cylinder direct lock two plate PVC injection molding machine produced by our company has the above performance, welcome to choose from guest rooms)


If you want to know more details about the PVC pipe fitting injection molding machine, please contact me.







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