Processing & Design
Custom Injection Molding
The TempRite® CPVC Custom Injection Molding Guide was developed to assist processors in the successful injection molding of TempRite plastic custom injection molding compounds. The bulletin reviews the recommended injection molding equipment, processing parameters and appropriate mold design that will enable processors to be successful in the first molding trial and each succeeding production run.
We have combined improved resins with state of-the-art compounding technology to produce a family of compounds that offer an outstanding blend of physical properties and excellent processibility. Today, these high flow TempRite compounds are being molded into part configurations that were impossible to achieve just a few short years ago.
Significant advances in processibility now enable industrial designers and engineers to utilize the excellent physical properties that TempRite plastic offers, including:
- Elevated temperature performance
- Inherent flame retardance
- Excellent electrical properties
- Excellent toughness
- Excellent chemical resistance
- Excellent surface appearance
- Fluorescent UV stability
- Ease of post fabrication and weldability
- Ease of painting and decorating
- Excellent mechanical property balance
The TempRite CPVC compound family is the most complete line of compounds for injection molding. Included in this family are compounds that offer Underwriters Laboratories flammability and thermal index ratings and compliance with NSF listings.
Contact your representative for information on the appropriate compound for a specific application. The following products are recommended for use in custom injection molding applications:
Product Data Sheets
TempRite CPVC compounds exhibit dramatic advancements in improved melt flow, increased thermal stability and reduced shear sensitivity. Optimum results will be obtained when they are processed according to the recommendations contained herein. Reviewing the contents of this bulletin prior to start up will greatly facilitate achieving successful first-time runs.
The TempRite CPVC Custom Injection Molding Guide includes:
Introduction
Equipment
- Machine Type
- Machine Size
- Screw Design
- Screw Tip
- Nozzle
- Chrome Plating
Molds
- Construction
- Draft Angle
- Shrinkage Allowances
- Venting
- Sprue Bushing
- Runners
- Cold Slug Wells
- Gates
Processing
- Drying
- Mold Temperature
- Melt Temperature
- Regrind
- Heater Band Settings
- Screw Back Pressure
- Screw RPM
- Injection Speed
- Injection and Holding Pressures
- Processing Higher Viscosity TempRite® CPVC
- Plastics
- Processing Summary
- Processing Guide Start-Up Procedure
- Purging and Shutdown Procedure
