Special threaded rod check valve for polypropylene of injection molding machine

• Main Authors: CAI HENGZHI, CHENG XUEQIANG, ZHOU WANCHANG
• Format: Patent
• Language: Chinese; English
• Published: 27.06.2012
• Subjects: ACTUATING-FLOATS; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BLASTING; COCKS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TAPS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VALVES; WEAPONS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The utility model discloses a special threaded rod check valve for polypropylene of an injection molding machine. The special threaded rod check valve comprises a check valve body, a gluing head, a check gasket, a check ring and a slotted hole, wherein the check valve body is in transmission connection with a threaded rod, and the gluing head is fixedly arranged at the front end of the check valve body; the check gasket is arranged at the front part of the check valve body, and the check ring is arranged between the check gasket and the gluing head; and the slotted hole is arranged between the check ring and the check valve body. Two contact surfaces are arranged between the check gasket and the check ring, and the contact surfaces are flat surfaces or cylindrical surfaces. As the technical scheme is adopted, compared with the prior art, the special threaded rod check valve has the advantages that a check valve assembly is optimized, a spring design is added, a check valve needle can quickly close the check v