Exhaust mechanism for injection mold for household articles

Abstract

The exhaust mechanism for the injection mold for the household articles comprises a fixed mold and further comprises a movable mold and an exhaust mechanism, the movable mold is arranged on one side of the surface of the fixed mold in a matched mode, the exhaust mechanism is arranged in the fixed mold, and the exhaust mechanism comprises a mold cavity, an exhaust cavity, an exhaust hole, a fixing frame, a spring A, a hollow pipe, a connecting rod and a clamping cover. A mold cavity for product forming is formed in the movable mold, in the molten material injection process, along with movement of materials, the inner space of the mold cavity is continuously compressed, redundant air passes through the interior of the hollow pipe from the exhaust hole position and then is exhausted through the exhaust cavity, and gas is exhausted outwards; after the clamping cover is completely closed, the surface of the clamping cover is flush with the interior of the die cavity, the problem that materials leak out to block the exhaust assembly is avoided, and the maintenance frequency of the die is reduced on the premise that effective exhaust is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an venting mechanism for injection molds used in household products. Background Technology

[0002] Injection molds are tools used to produce plastic products. By injecting molten plastic material into the mold, and then pressing and cooling it, the product is formed into the desired shape. Injection molds typically consist of a mold base, mold core, mold cavity, cooling system, and discharge system. In everyday household goods, most plastic products are produced using injection molds in conjunction with injection molding machines, making them widely used.

[0003] Existing injection molds have the following drawbacks during use: In order to expel the gas inside the mold cavity during the injection molding process, injection molds are generally equipped with venting structures. Existing common venting structures usually have venting grooves directly opened at the venting position. After long-term use, the venting grooves often become clogged, requiring frequent unclogging. To address this, we propose a venting mechanism for injection molds used in household goods. Utility Model Content

[0004] The main purpose of this utility model is to provide a venting mechanism for injection molds used in household products. By setting the venting mechanism inside the fixed mold, it can effectively vent air and reduce the problem of material blockage, thus effectively solving the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A venting mechanism for an injection mold used in household goods includes a fixed mold, a moving mold, and a venting mechanism. The moving mold is fitted to one side of the fixed mold surface, and the venting mechanism is located inside the fixed mold. The venting mechanism includes a mold cavity, a venting chamber, a venting hole, a fixing frame, a spring A, a hollow tube, a connecting rod, and a cover. The moving mold has a mold cavity for forming the product. Venting chambers are located in the moving mold at positions away from the injection end of the mold cavity, and venting holes are provided at the ends of the venting chambers, communicating with the interior of the mold cavity. A fixing frame is fixedly connected inside the venting chamber, and a hollow tube is movably connected to the surface of the fixing frame via spring A. A connecting rod is welded to the end of the hollow tube away from spring A, and a cover corresponding to the specifications of the venting hole is installed on the top of the connecting rod.

[0007] Furthermore, it also includes an auxiliary mechanism. The fixed mold surface is provided with an auxiliary mechanism, which includes a diversion pipe, a venting pipe, and a suction pipe. The fixed mold surface is equipped with a diversion pipe that communicates with the end of the venting chamber. One end of the diversion pipe is provided with a venting pipe, and the other end of the diversion pipe is provided with a suction pipe. The fixed mold surface is provided with a diversion pipe that communicates with the interior of the venting chamber. Both ends of the diversion pipe are respectively provided with a venting pipe and a suction pipe. Under normal working conditions, venting is carried out directly through the venting pipe. When it is necessary to improve the venting quality and efficiency inside the mold cavity, an external suction device can be connected through the suction pipe to pressurize and extract the air inside the mold cavity after mold closing, thereby improving venting efficiency.

[0008] Furthermore, a crossbeam is welded to one end of the inner wall of the hollow tube, and the end of the connecting rod is connected to the crossbeam. A pivot is installed at the connection between the end of the connecting rod away from the crossbeam and the bottom of the cover. A pivot structure is provided at the connection between the connecting rod and the cover. The pivot structure does not affect the pulling of the cover by the connecting rod, and at the same time enables the cover to open and close normally.

[0009] Furthermore, limit grooves are provided on both sides of the inner wall of the vent hole. Springs B are installed at both ends of the card cover and pins inserted into the limit grooves are movably connected through springs B. After the card cover is installed in place, the pins are inserted into the limit grooves, and the card cover is connected to the inside of the mold cavity through the pins, so that the card cover can be rotated around the position of the pins.

[0010] Furthermore, a valve is installed inside the vent pipe; when using an air extraction device for venting, the valve can be closed to shut off the vent pipe.

[0011] Compared with the prior art, this utility model has the following beneficial effects: An venting chamber and a retaining cap structure are provided inside the mold cavity, away from the injection end. In the normal mold-closing state, spring A pushes the hollow tube, causing the retaining cap to rotate around the pin, opening on the side away from the injection point. During the molten material injection process, as the material moves, the internal space of the mold cavity is continuously compressed. Excess air passes through the hollow tube from the venting hole and is discharged through the venting chamber, achieving gas exhaust. When the molten material moves to the retaining cap position, it will contact the retaining cap from the pin side and continue flowing. The cover is continuously pressed until it closes. After it is fully closed, the surface of the cover is flush with the inside of the mold cavity, which avoids the problem of material leakage and blockage of the venting components. This ensures effective venting while reducing the number of mold maintenance operations. The fixed mold surface is equipped with a diversion pipe that communicates with the inside of the venting cavity. The two ends of the diversion pipe are respectively equipped with an air release pipe and an air extraction pipe. Under normal working conditions, venting is carried out directly through the air release pipe. When it is necessary to improve the venting quality and efficiency inside the mold cavity, an external air extraction device can be connected through the air extraction pipe to pressurize and extract the air inside the mold cavity after the mold is closed, thereby improving venting efficiency. Attached Figure Description

[0012] Figure 1This is a schematic diagram of the overall structure of an venting mechanism for an injection mold used in household products according to this utility model.

[0013] Figure 2 This is a schematic diagram of the internal structure of the fixed mold of an injection mold for household products according to the present invention.

[0014] Figure 3 This utility model relates to an venting mechanism for injection molds used in household goods. Figure 2 Enlarged structural diagram at point A in the middle.

[0015] Figure 4 This is a schematic diagram of the connection between the cover and the mold cavity of the venting mechanism for an injection mold used in household products according to this utility model.

[0016] In the diagram: 1. Fixed mold; 2. Moving mold; 3. Exhaust mechanism; 301. Mold cavity; 302. Exhaust chamber; 303. Exhaust hole; 304. Fixing frame; 305. Spring A; 306. Hollow tube; 307. Cross frame; 308. Connecting rod; 309. Rotating shaft; 310. Cover; 311. Limiting groove; 312. Spring B; 313. Pin; 4. Auxiliary mechanism; 401. Diverter pipe; 402. Vent pipe; 403. Extraction pipe; 404. Valve. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] like Figure 1-4 As shown, a venting mechanism for an injection mold used in household goods includes a fixed mold 1, a movable mold 2, and a venting mechanism 3. The movable mold 2 is fitted onto one side of the fixed mold 1, and the venting mechanism 3 is disposed inside the fixed mold 1. The venting mechanism 3 includes a mold cavity 301, a venting chamber 302, a venting hole 303, a fixing frame 304, a spring A 305, a hollow tube 306, a connecting rod 308, and a retaining cover 310. The movable mold 2 has a mold cavity 301 for forming the product. The mold cavity 301 is provided with venting chambers 302 located away from the injection end, and the end of the venting chamber 302 is provided with venting holes 303 that communicate with the inside of the mold cavity 301. A fixing frame 304 is fixedly connected inside the venting chamber 302, and a hollow tube 306 is movably connected to the surface of the fixing frame 304 through a spring A305. A connecting rod 308 is welded to the end of the hollow tube 306 away from the spring A305, and a clip cover 310 corresponding to the specification of the venting hole 303 is installed on the top of the connecting rod 308.

[0019] The system also includes an auxiliary mechanism 4. The surface of the fixed mold 1 is provided with the auxiliary mechanism 4, which includes a diversion pipe 401, a vent pipe 402, and a suction pipe 403. The surface of the fixed mold 1 is provided with a diversion pipe 401 that communicates with the end of the venting chamber 302. One end of the diversion pipe 401 is provided with a vent pipe 402, and the other end of the diversion pipe 401 is provided with a suction pipe 403. The surface of the fixed mold 1 is provided with a diversion pipe 401 that communicates with the interior of the venting chamber 302. The two ends of the diversion pipe 401 are respectively provided with a vent pipe 402 and a suction pipe 403. Under normal working conditions, venting is performed directly through the vent pipe 402. When it is necessary to improve the venting quality and efficiency inside the mold cavity 301, an external suction device can be connected through the suction pipe 403 to pressurize and extract the air inside the mold cavity 301 after mold closing, thereby improving venting efficiency.

[0020] The hollow tube 306 has a crossbeam 307 welded to one end of its inner wall, and the end of the connecting rod 308 is connected to the crossbeam 307. A rotating shaft 309 is installed at the connection between the end of the connecting rod 308 away from the crossbeam 307 and the bottom of the cover 310. Limiting grooves 311 are formed at corresponding positions on both sides of the inner wall of the exhaust hole 303. Springs B312 are installed at both ends of the cover 310, and springs B312 are movably connected to the limiting grooves 311. The internal pin 313; the connecting rod 308 and the cover 310 are connected by a rotating shaft 309 structure. The rotating shaft 309 structure does not affect the pulling of the connecting rod 308 on the cover 310, and at the same time enables the cover 310 to open and close normally. After the cover 310 is installed in place, the pin 313 is inserted into the limiting groove 311. The pin 313 connects the cover 310 to the inside of the mold cavity 301, and at the same time enables the cover 310 to rotate around the position of the pin 313.

[0021] The vent pipe 402 is equipped with a valve 404; when using a vacuum device for venting, the valve 404 can be closed to shut off the vent pipe 402.

[0022] It should be noted that this utility model is a venting mechanism for injection molds used in household products. During operation, a venting chamber 302 and a retaining cover 310 are provided inside the mold cavity 301, away from the injection end. In the normal mold-closed state, the spring A305 pushes the hollow tube 306, causing the retaining cover 310 to rotate around the pin 313, opening on the side away from the injection feeding position. During the molten material injection process, as the material moves, the internal space of the mold cavity 301 is continuously compressed. Excess air is discharged from the venting hole 303, passes through the hollow tube 306, and then exits through the venting chamber 302, achieving gas exhaust. When the molten material moves to the position of the retaining cover 310, it will contact the retaining cover from the side of the pin 313. 310 continues to flow, and the cap 310 is continuously pressed until it closes. After it is fully closed, the surface of the cap 310 is flush with the inside of the mold cavity 301, which avoids the problem of material leakage and blockage of the venting components, and reduces the number of mold maintenance while ensuring effective venting. The surface of the fixed mold 1 is provided with a diversion pipe 401 that communicates with the inside of the venting cavity 302. The two ends of the diversion pipe 401 are respectively provided with an air release pipe 402 and an air extraction pipe 403. Under normal working conditions, venting is carried out directly through the air release pipe 402. When it is necessary to improve the venting quality and efficiency inside the mold cavity 301, an external air extraction device can also be connected through the air extraction pipe 403 to pressurize and extract the air inside the mold cavity 301 after the mold is closed, thereby improving the venting efficiency.

[0023] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A venting mechanism for injection molds used in household goods, comprising a fixed mold (1), characterized in that, It also includes a moving mold (2) and an exhaust mechanism (3). The moving mold (2) is provided on one side of the surface of the fixed mold (1), and the exhaust mechanism (3) is provided inside the fixed mold (1). The exhaust mechanism (3) includes a mold cavity (301), an exhaust chamber (302), an exhaust hole (303), a fixing frame (304), a spring A (305), a hollow tube (306), a connecting rod (308), and a cover (310). The moving mold (2) has a mold cavity (301) for forming the product inside. The moving mold (2) is located inside the mold cavity (301). Venting chambers (302) are provided at positions away from the injection end, and venting holes (303) are provided at the ends of the venting chambers (302) and communicate with the interior of the mold cavity (301). A fixing frame (304) is fixedly connected inside the venting chamber (302), and a hollow tube (306) is movably connected to the surface of the fixing frame (304) through a spring A (305). A connecting rod (308) is welded to the end of the hollow tube (306) away from the spring A (305), and a clip cover (310) corresponding to the specification of the venting hole (303) is installed on the top of the connecting rod (308).

2. The venting mechanism for injection molds used in household goods according to claim 1, characterized in that: It also includes an auxiliary mechanism (4). The surface of the fixed mold (1) is provided with the auxiliary mechanism (4). The auxiliary mechanism (4) includes a diversion pipe (401), a vent pipe (402) and a suction pipe (403). The surface of the fixed mold (1) is provided with a diversion pipe (401) that communicates with the end of the exhaust chamber (302). One end of the diversion pipe (401) is provided with a vent pipe (402) and the other end of the diversion pipe (401) is provided with a suction pipe (403).

3. The venting mechanism for injection molds used in household goods according to claim 1, characterized in that: A crossbar (307) is welded to one end of the inner wall of the hollow tube (306), and the end of the connecting rod (308) is connected to the crossbar (307). A rotating shaft (309) is installed at the connection between the end of the connecting rod (308) away from the crossbar (307) and the bottom of the cover (310).

4. The venting mechanism for injection molds used in household goods according to claim 1, characterized in that: Limiting grooves (311) are provided on both sides of the inner wall of the exhaust hole (303). Springs B (312) are installed at both ends of the inside of the cover (310), and a pin (313) inserted into the limiting groove (311) is movably connected through the springs B (312).

5. The venting mechanism for injection molds used in household goods according to claim 2, characterized in that: A valve (404) is installed inside the vent pipe (402).

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