Color plastic products manufacture method

• Main Author: ZHAO JIUYONG
• Format: Patent
• Language: Chinese; English
• Published: 29.04.2009
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention relates to a manufacturing method of a color plastic product. Before entering a mold for injection molding, pigments are added into plastic particles, particularly the pigments are paste-shaped; and the paste-shaped pigments are rationed accurately by a color paste metering pump, then flow into a screw of an injection molding machine and then are fully blended with the plastic particles in the screw of the injection molding machine. The paste-shaped pigments added by the invention can be fully blended with the plastic particles in the screw of the injection molding machine; therefore, the manufactured plastic product has better color. Besides, the method saves the stirring technique, simplifies the procedures and reduces the cost.