Double-channel gas-assisted molding device for injection molding

Abstract

The utility model relates to the technical field of automobile trim panel forming, and discloses a double-channel gas-assisted forming device for injection molding, which comprises a base, a mold box is mounted at the top of the base, an alarm triggering mechanism is arranged at the top of the mold box, a conduction mechanism is arranged at the front part of the mold box, and the alarm triggering mechanism consists of a mounting component and a triggering component. The trigger assembly comprises a telescopic rod, the top of the telescopic rod is fixedly connected with a mounting frame, the inner wall of the mold box is slidably connected with an elastic rod, the right side of the elastic rod is connected with a bearing disc, the inner wall of the mold box is provided with a closing button, the mounting assembly comprises an anti-overflow cover, and the middle of the anti-overflow cover communicates with a conveying pipe. According to the gas filling device, under the action of the conveying pipe, the elastic rod and the closing button, when too much gas is injected, the gas filling device is closed in time, the quality problems of uneven wall thickness and deformation of a product caused by too much gas injection are avoided, and it is ensured that the product meets the design requirement and the quality standard.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile trim forming, especially to a double-channel gas-assisted forming device for injection molding. BACKGROUND

[0002] In the automobile industry, automobile trim is an important interior and exterior component, which not only needs to have an attractive appearance, but also must meet strict quality and performance standards. With the continuous innovation of automobile design and the increasing demand of consumers for automobile quality, the manufacturing process of automobile trim is facing more and more challenges. The traditional injection molding process has many problems in the production of automobile trim. Due to the uneven flow of plastic melt in the mold cavity, it is easy to cause the trim to have inconsistent wall thickness, local shrinkage, stress concentration and other defects, affecting the strength and appearance quality of the product. In order to solve these problems, gas-assisted injection molding technology has emerged. This technology injects gas during injection molding to form a hollow structure, thereby reducing product weight, optimizing internal stress distribution, and improving surface quality.

[0003] In the production of automobile trim by gas-assisted injection molding, the operator cannot know whether the gas is in a full state inside the mold. Only a fixed amount of gas can be introduced into the same batch or the same shape of automobile trim mold. However, the mold gradually hardens after it is in a flow state before forming. It cannot guarantee that the softness and hardness of each batch of mold are completely consistent when the gas is injected. Therefore, there will be errors between the same batch of molds. The same amount of gas injected into the same batch of molds will also cause individual mold rupture or deformation. Some areas become too thick due to excessive gas filling, while other areas are relatively thin. This greatly destroys the uniformity and stability of the product structure. At the same time, excessive gas injection also causes the product to deform. The designed accurate shape and size cannot be guaranteed. Therefore, a double-channel gas-assisted forming device for injection molding is proposed to solve the above problems. SUMMARY

[0004] In order to make up for the above shortcomings, the utility model provides a double-channel gas-assisted forming device for injection molding, which solves the problem of "mold errors, the same amount of gas injected into the same batch of molds will also cause individual mold rupture or deformation, and some areas become too thick due to excessive gas filling, while other areas are relatively thin" mentioned in the prior art.

[0005] In order to achieve the above object, the utility model discloses the following technical scheme: a kind of double-channel gas assisted forming device for injection molding, including base, the top of the base is installed with mould box, the top of the mould box is provided with alarm mechanism, the front of the mould box is provided with conduction mechanism, the alarm mechanism is composed of mounting assembly and trigger assembly, the trigger assembly includes telescopic link, the top of the telescopic link is fixedly connected with mounting frame, the inner wall of the mould box is slidably connected with elastic rod, the right side of the elastic rod is connected with bearing disc, the inner wall of the mould box is provided with closing knob.

[0006] As further description of the above technical solution: the mounting assembly includes anti-overflow cover, the middle part of the anti-overflow cover is communicated with transmission pipe.

[0007] As further description of the above technical solution: the surface of the telescopic link and the top of the mould box are elastically slidably connected, and the bottom of the mounting frame after moving is in contact with the top of the mould box.

[0008] As further description of the above technical solution: the bottom of the anti-overflow cover is fixedly connected with the top of the mounting frame, and the surface of the elastic rod after moving is in contact with the closing knob.

[0009] As further description of the above technical solution: the conduction mechanism includes gas delivery pipe, one end of the gas delivery pipe away from the mould box is communicated with mixing box, and the front of the mixing box is communicated with heating pipe.

[0010] As further description of the above technical solution: the conduction mechanism further includes circuit board, the output end of the circuit board is plugged with heat-conducting sheet through electric wire, and the front of the heating pipe is communicated with air pump.

[0011] As further description of the above technical solution: the surface of the gas delivery pipe is fixedly connected with the inner wall of the mould box.

[0012] As further description of the above technical solution: the circuit board is fixedly connected with the top of the mixing box, and the outer surface of the heat-conducting sheet is in contact with the inner wall of the heating pipe.

[0013] The utility model has the following beneficial effects:

[0014] 1、In the utility model, through the cooperation of transmission pipe, bearing disc, elastic rod, closing knob and other structures, when gas is injected into the automobile trim molding for forming, the gas filling equipment is closed in time when too much gas is injected, the quality problems of uneven wall thickness and deformation of products caused by too much gas injection are avoided, and the products meet the design requirements and quality standards.

[0015] 2. The utility model discloses, through the cooperation of operation between gas pipe, mixing box, heating tube, circuit board, realize the preheating before the gas injection, reduce the temperature difference between gas and melt, improve the fusion effect of both, reduce the product defect. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is whole structure schematic diagram of a kind of double-channel gas auxiliary forming device for injection molding in the utility model;

[0017] Figure 2 It is whole structure half cutaway view of a kind of double-channel gas auxiliary forming device for injection molding in the utility model;

[0018] Figure 3 It is elastic rod structure schematic diagram of a kind of double-channel gas auxiliary forming device for injection molding in the utility model;

[0019] Figure 4 It is heating tube structure half cutaway view of a kind of double-channel gas auxiliary forming device for injection molding in the utility model.

[0020] LEGEND:

[0021] 1, base;2, mould box;3, alarm mechanism;301, telescopic rod;302, mounting frame;303, anti-overflow cover;304, transmission pipe;305, bearing disc;306, elastic rod;307, closing knob;4, conduction mechanism;401, gas pipe;402, mixing box;403, heating tube;404, circuit board;405, heat-conducting sheet;406, air pump. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0023] Please refer to Figure 1 - Figure 2 The utility model provides a kind of double-channel gas auxiliary forming device for injection molding, including base 1, the top of base 1 is equipped with mould box 2, mould box 2 can be detached from the top of base 1, it is convenient to replace different automobile ornament mould, the top of mould box 2 is provided with alarm mechanism 3, the front of mould box 2 is provided with conduction mechanism 4, the device is individual mould, and pouring work needs external pouring equipment and it is used in cooperation.

[0024] Please refer to Figure 1 -Figure 3 The touch alarm mechanism 3 is composed of an installation assembly and a trigger assembly, the trigger assembly includes a telescopic rod 301, a spring is mounted on the surface of the telescopic rod 301, and the telescopic rod 301 is used for connecting a mold box 2 and an installation frame 302, the top of the telescopic rod 301 is fixedly connected with the installation frame 302, the installation frame 302 is driven to move downwards by the pressing of the infusion equipment, the inner wall of the mold box 2 is slidably connected with an elastic rod 306, the elastic rod 306 is pressed by a bearing disc 305 and is displaced, the right side of the elastic rod 306 is connected with the bearing disc 305, the inner wall of the mold box 2 is provided with a closing knob 307, the bearing disc 305 drives the elastic rod 306 to move, the surface of the elastic rod 306 after moving is in contact with the closing knob 307, the surface of the telescopic rod 301 is slidably connected with the top of the mold box 2, and the bottom of the installation frame 302 after moving is in contact with the top of the mold box 2.

[0025] Please refer to Figure 1 - Figure 3 The installation assembly includes the anti-overflow cover 303, the anti-overflow cover 303 is closed, and the anti-overflow cover 303 is used for preventing the plastic mold from overflowing, the middle part of the anti-overflow cover 303 is communicated with a transmission pipe 304, the transmission pipe 304 is connected with the infusion equipment, the bottom of the anti-overflow cover 303 is fixedly connected with the top of the installation frame 302, the surface of the elastic rod 306 after moving is in contact with the closing knob 307, and when the gas is injected into the plastic mold for forming, the gas injection equipment can be closed in time when the gas injection is too much, so that the quality problems of uneven wall thickness and deformation of products caused by excessive gas injection are avoided.

[0026] Please refer to Figure 4 The conduction mechanism 4 includes a gas conveying pipe 401, the gas conveying pipe 401 is communicated with the mold box 2 and can infuse the gas into the plastic mold, one end, away from the mold box 2, of the gas conveying pipe 401 is communicated with a mixing box 402, the mixing box 402 divides the heated gas into two parts for transmission, the front part of the mixing box 402 is communicated with a heating pipe 403, the heating pipe 403 is a metal object, receives heat conduction of a heat conduction sheet 405, and is heated, the surface of the gas conveying pipe 401 is fixedly connected with the inner wall of the mold box 2, the conduction mechanism 4 further includes a circuit board 404, the circuit board 404 is connected with the heat conduction sheet 405 and converts electric energy into heat energy, the output end of the circuit board 404 is plugged with the heat conduction sheet 405 through an electric wire, the heat conduction sheet 405 is also a metal object and can conduct heat to the heating pipe 403, the front part of the heating pipe 403 is communicated with a gas pump 406, the circuit board 404 is fixedly connected with the top of the mixing box 402, the outer surface of the heat conduction sheet 405 is in contact with the inner wall of the heating pipe 403, and the gas is preheated before being injected, the temperature difference between the gas and the melt is reduced, the fusion effect of the two is improved, and product defects are reduced.

[0027] Working principle: in use, the operator controls the plastic mold infusion device from top to bottom until the plastic mold infusion device is aligned with the transmission pipe 304, and by pressing the infusion device, the anti-overflow cover 303 drives the mounting frame 302 to move down, the mounting frame 302 moves down and contacts the top of the mold box 2, realizing the sealing effect, at this time the quantitative infusion work is carried out, the quantitative gel plastic mold flows from the transmission pipe 304 to the top of the bearing disc 305, then waits for the right time, and air is infused into the soft plastic mold that has not been fixed and shaped, when the air enters the soft plastic mold, the soft plastic mold becomes inflated and expands, and the bearing disc 305 is expanded and squeezed to move, the bearing disc 305 drives the elastic rod 306 to move, the surface of the elastic rod 306 after moving contacts the closing knob 307, so that the closing knob 307 closes the gas infusion device, realizes preheating before gas injection, reduces the temperature difference between the gas and the melt, improves the fusion effect of the two, reduces the product defects, and the specific principle of the gas infusion device is that the operator starts the air pump 406, the air pump 406 transmits the gas to the heating pipe 403, at this time the heat-conducting sheet 405 in the heating pipe 403 generates heat through the power input by the circuit board 404, the heat is conducted to the heating pipe 403, and the air passing through the heating pipe 403 is affected by the heat, so that the temperature of the air is increased, then the air enters the mixing box 402, and finally is pressurized to the plastic mold through the gas pipe 401 to assist in molding, realizes preheating before gas injection, reduces the temperature difference between the gas and the melt, improves the fusion effect of the two, reduces the product defects.

[0028] Finally, it should be pointed out that: the above only preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application, for the person skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of protection of the present application.

Claims

1. A dual-channel gas-assisted forming device for injection molding, comprising a base (1), characterized in that: The top of the base (1) is provided with a mold box (2), the top of the mold box (2) is provided with a alarm mechanism (3), the front of the mold box (2) is provided with a conduction mechanism (4), the alarm mechanism (3) is composed of an installation assembly and a trigger assembly, the trigger assembly comprises a telescopic rod (301), the top of the telescopic rod (301) is fixedly connected with a mounting frame (302), the inner wall of the mold box (2) is slidably connected with an elastic rod (306), the right side of the elastic rod (306) is connected with a bearing disc (305), and the inner wall of the mold box (2) is provided with a closing knob (307).

2. The dual-channel gas-assisted forming device for injection molding according to claim 1, characterized in that: The installation assembly comprises an anti-overflow cover (303), and the middle of the anti-overflow cover (303) is communicated with a transmission pipe (304).

3. The dual-channel gas-assisted forming device for injection molding according to claim 1, characterized in that: The surface of the telescopic rod (301) is elastically and slidably connected with the top of the mold box (2), and the bottom of the mounting frame (302) after movement is in contact with the top of the mold box (2).

4. The dual-channel gas-assisted forming device for injection molding according to claim 2, characterized in that: The bottom of the anti-overflow cover (303) is fixedly connected with the top of the mounting frame (302), and the surface of the elastic rod (306) after movement is in contact with the closing knob (307).

5. The dual-channel gas-assisted forming device for injection molding according to claim 1, characterized in that: The conduction mechanism (4) comprises a gas conveying pipe (401), one end of the gas conveying pipe (401) away from the mold box (2) is communicated with a mixing box (402), and the front of the mixing box (402) is communicated with a heating pipe (403).

6. The dual-channel gas-assisted forming device for injection molding according to claim 5, characterized in that: The conduction mechanism (4) further comprises a circuit board (404), the output end of the circuit board (404) is plugged with a heat-conducting sheet (405) through wires, and the front of the heating pipe (403) is communicated with an air pump (406).

7. The dual-channel gas-assisted forming device for injection molding according to claim 5, characterized in that: The surface of the gas conveying pipe (401) is fixedly connected with the inner wall of the mold box (2).

8. The dual-channel gas-assisted forming device for injection molding according to claim 6, characterized in that: The circuit board (404) is fixedly connected with the top of the mixing box (402), and the outer surface of the heat-conducting sheet (405) is in contact with the inner wall of the heating pipe (403).

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