quality control
TW molder utilizes the most sophisticated measuring technologies available. High precision micro-scopes, lapra-scopes, and traditional measurement equipment are used by our highly trained quality engineers.
All of our injection plastic mold is built according to our Quality Policy, and our operating policy is to encourage and train all employees to pursue never-ending improvement in the productivity and quality of the products we manufacture.
Molding samples check reports.after we finished initial sample sizes check,then will delivery the samples to customers for final check.After the samples are ok by customers,then we delivey mould.
Plastic mold building process check
plastic mold size check plastic mold size check
Plastic trial size check
TW plastic mold QC 3 main steps:
>>1.Incoming quality control:
all steel material and outsourcing standard components will be checked to ensure that they confirm with the demands for the custom mold;
>>2.Inprocess quality control:
all the machining and assembling process is under control,we have QC team to check and supervise the tolerance and processed surface to satisfy the requirments;
>>3.Final quality control:
upon the completion of the plastic mold,we will have a thorough check for the main size of the trial plastic sample and mold to ensure the every steps havn't be overlooked and plastic quality is ok .
Plastic Mold Building Standard:
taper lock side lock taper lock
LKM insert
Plastic Mold steel and its treatment:
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specification
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CHINA
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U.S.
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JAPAN
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SWEDEN
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GERMANY
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USAGE FIELD
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PLASTIC MOLD STEEL
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B30
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2738
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for the mold or mold base of small run,low load,tolerance and surface requirments are not high
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B20
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50
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1050
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S50C
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C50
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45
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1045
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S48C
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C45
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45
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1045
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S45C
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C45
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B610SM1
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40Cr
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G51400
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SCr440
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SUPER MIRROR-EFFECT MOLD STEEL
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3-4Cr13
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420
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S-136
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2083
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for the plastic mold for PVC,transparent plastic molding and high polishing surface.
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3Cr2Mo
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P20
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40CrMo74
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high purity,good machining property,close tolerance,never deform for large and complex plastic mold.
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P4410
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P20tNi
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PDS5S
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718
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2738
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Mold cooling system Benefits :
Improve Part Quality (even cooling)
Increase Productivity (efficient cooling)
Adopted methods:
SelectPlastic Material with large thermal diffusivity
usa a thin and uniform part thickness
layout cooling channels around cavities
remove airgap and pockets from heat transfer path
balance coolant flow
check cooling efficiently
make cooling evenly
select appropriate equipment
Entrapment of gases during plastic injection is a problem that continues to challenge the design capabilities of moldmakers. The increasing complexity of tooling demanded by today's manufacturers dictates that many areas inside molds are quite difficult to vent adequately. Gases compressed in these remote pockets can scorch finished plastic parts and cause "short shots" or incomplete filling of the mold. Trapped air also causes shrinkage that produces ripples or depressions in finished parts. Additionally, the strong back pressure produced when filling molds that incorporate conventional venting channels can retard plastic flow rate. Conventional methods employs parting-line vents, vent plugs ， pins and runners.
Plastic Mold base system:
plastic mold manufacturer quality contorl
injection plastic mold
