KR-20260063973-A - Heater Cover For Injection Molding

Abstract

The present invention relates to a heater cover for an injection molding machine, comprising a pair of heater covers having a semicircular arc shape that surrounds the injection molding machine, the heater covers comprising: a body portion (1) having an outer shape of a semicircular arc shape and containing a liquid inside; a heater receiving portion (5) provided at each end of the body portion (1) and receiving a heater in the longitudinal direction; a temperature sensor receiving portion (3) provided at the center of the body portion (1) and receiving a temperature sensor in the longitudinal direction; an insulating member (4) provided to surround the outside of the body portion (1); and a fastening portion (8) provided at the end of the body portion to fasten the pair of heater covers.

Inventors

• 문익주

Assignees

• 주식회사 건아

Dates

Publication Date

20260507

Application Date

20241031

Claims (2)

1. In a pair of heater covers in the shape of a semicircular arc that surround an injection molding machine, A body part (1) having a semicircular arc shape and containing liquid inside, and A heater receiving portion (5) provided at each end of the body portion (1) and receiving a heater in the longitudinal direction; A temperature sensor receiving portion (3) provided in the center of the upper body portion (1) and receiving a temperature sensor in the longitudinal direction; An insulating member (4) provided to wrap around the outside of the body part (1); A fastening portion (8) provided at the end of the body portion to fasten the above pair of heater covers, Heater cover for injection molding machine
2. In claim 1, The above-mentioned insulating member (4) is characterized by being made of Cerachrome material. Heater cover for injection molding machine

Description

Heater Cover for Injection Molding Machine The present invention relates to a heater cover for an injection molding machine, comprising a pair of heater covers having a semicircular arc shape that surrounds the injection molding machine, the heater covers comprising: a body portion (1) having an outer shape of a semicircular arc shape and containing a liquid inside; a heater receiving portion (5) provided at each end of the body portion (1) and receiving a heater in the longitudinal direction; a temperature sensor receiving portion (3) provided at the center of the body portion (1) and receiving a temperature sensor in the longitudinal direction; an insulating member (4) provided to surround the outside of the body portion (1); and a fastening portion (8) provided at the end of the body portion to fasten the pair of heater covers. Generally, an injection molding machine refers to a process that injects materials such as rubber to form a product into a predetermined shape. In the description of the configuration of the injection molding machine, unnecessary configurations, descriptions, and drawings that may obscure the essence of the present invention are omitted. The injection molding machine injects rubber material into the upper and lower molds to form a product of a predetermined shape. At the same time, to prevent defects in the molded product caused by air bubbles that may arise from external air entering the mold during pressurized molding in the atmosphere, and to separate and discharge odors and harmful gases generated during the process, the injection molding is performed under vacuum conditions within a vacuum chamber. As shown in FIG. 6, the conventional heater cover is configured such that the front and back surfaces of a resistance ribbon (54), to which terminals (50) and (52) are connected at both ends, are insulated with insulating plates (56) and (58) made of mica, and the front and back surfaces of the insulating plates (56) and (58) are wrapped with zinc plates (60) and (62), and then mounted around the nozzle of an injection molding machine using a tightening band (68) having a nut (64) and a tightening screw (66) at each end. Although such conventional heater covers have the advantages of being compact and lightweight, their insulation and structural strength are weak, and since the heating temperature is only about 250 to 300°C, they cannot be used in injection molding machines that require higher temperatures. Furthermore, molten resin that leaks from the nozzle of the injection molding machine during use penetrates into the interior of the heater cover, requiring frequent replacement with a new one. Additionally, expensive specialized manufacturing equipment is required to seal the edges, which inevitably leads to high manufacturing costs for the heater cover. Meanwhile, frequent movement of the wires could loosen the internal sealing treatment of the coupler, which was performed for the purpose of sealing the inside of the coupler and fixing the wires, and thus there was even a concern that it could impair the vacuum capacity of the vacuum chamber, and there was also a situation where repair work was difficult in the event of problems such as short circuits of the wires to the coupler or heater rods. In addition, when wiring to conventional heater rods, multiple wires were connected from the coupler to the heater rod with extra length to account for movement; however, this resulted in wiring complexity due to the extra length, and the entanglement of multiple wires caused interference with movement, thereby exacerbating the aforementioned problems. For reference, the above prior art can be more easily understood through the vacuum forming device of another injection molding machine described below. In addition, the injection molding machine is divided into a clamping section and an injection section. The clamping section consists of a clamping cylinder, a movable plate, a fixed plate, etc., which open and close the mold to prevent it from opening due to internal pressure caused by the injected molten resin. The injection section is the part where solid resin is poured in and melted, and then the molten resin is fed into the mold. It consists of a hopper for receiving the resin raw material, a heater for heating the cylinder, and a screw for transporting the raw material. In addition, the power and electrical control unit for controlling the injection molding machine performs the role of controlling temperature and power, and there is a hydraulic drive unit that moves the cylinder. The problem here is that a large amount of electrical energy is required to raise the temperature, and the electricity consumption is very high because a significant amount of thermal energy is needed for the process of melting the resin. [Patent Literature] KR 10-2007-0122244 A Figure 1 is a configuration diagram of an injection molding machine. Figure 2 is an explanatory diagram of the operation of an in