PVC mold

What do I need to pay attention to for PCV mold injection?

  • Pay attention to cleaning the plastic in the barrel and screw before injection molding PVC mold to avoid raw material quality change with other materials, and cleaning the barrel and screw after injection molding PVC mold to prevent PVC materials from corroding the
  • Melt temperature 185-205 ℃
  • Injection speed should be slow, otherwise excessive shear will degrade the quality of the material
  • Screw speed, should match the molding cycle depends. Screw surface speed should not exceed 0.15-0.2m / s
  • Back pressure, 5bar -150bar, the lower the better.
  • Holding time, at a temperature of 200°C, the barrel dwell time should not exceed 5 minutes at most. When the temperature is 210℃, the barrel retention time should not exceed 3 minutes.

The following points should be noted in product design and mold design

  1. The product should not have sharp corners or abrupt changes as far as possible, and the thickness should strive to vary little to prevent the degradation of PVC.
  2. The mold should have a mold slope of more than 10 degrees and allow for about 0.5% shrinkage.
  3. Design round flow channel in order to reduce the pressure and easy to take off the mold, the diameter is between 6-10mm.
  1. The injection port of the mold should be slightly larger than the injection nozzle hole and larger than the diameter of the main flow channel intersection, so that the PVC material flows into the mold cavity without stagnation and the pressure can be balanced
  2. Cooling device to control the mold temperature between 30 ℃ ~ 60 ℃.
  3. The mold material is made of stainless steel such as H13 HRC 54-56, chrome plated to prevent corrosion and polished surface.

PVC material product advantages

– Good value for money

– Light weight

– High hardness

– Moisture resistant, fire resistant

– Excellent dimensional stability

– Strong impact toughness

– Acid and alkali resistant, corrosion resistant

– Stable dielectric properties

– High durability

– Recyclable

Applications of Injection Molded PVC

Some common products made from PVC using the injection molding process include

– Automotive parts

– Electrical appliances

– Bottle caps

– Machinery

– Toys

– Construction parts

– Furniture parts

Muyoung team has extensive experience in manufacturing high quality, inexpensive PVC to meet your needs, whether you need PVC mold or injection molded PVC products, we will provide fast service.

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We accept the 3D model with file formats: STEP(.stp), IGES(.igs), PRT(.prt),X_T(.xt),STL(.stl), 2D drawing format: PDF、DWG、DXF, The maximum supported file size is 80MB, for large or multiple files, please place into folder and compress into a ZIP or RAF files.

H13 steel is the most widely used and most representative hot work die steel grade, its main characteristics are

(1) High hardenability and high toughness.

(2) Excellent resistance to thermal cracking and can be water cooled in the workplace.

(3) Medium wear resistance, carburizing or nitriding can also be used to improve its surface hardness, but to slightly reduce the resistance to thermal cracking.

(4) Poor secondary hardening ability in tempering due to its low carbon content.

(5) Softening resistance at higher temperatures, but a rapid drop in hardness at operating temperatures above 540°C (1000°F) (i.e. a working temperature of 540°C can be tolerated).

(6) Small deformation from heat treatment.

(7) Moderate and high machinability.

(8) Medium resistance to decarburization.