Low-pressure injection molding mold

Abstract

The utility model discloses a low-pressure injection molding die which comprises a fixed die, hydraulic rods are fixedly arranged on the two sides of the fixed die, a movable die is fixedly arranged at the top ends of the hydraulic rods, a positioning mechanism facilitating die assembly is arranged between the fixed die and the movable die, and a heat preservation mechanism is arranged on one side of the fixed die. The heat preservation mechanism comprises a storage box, a pump body, a first pipeline, a connecting valve, a corrugated pipe, an electromagnetic valve, a multi-head pipe and a second pipeline, and the pump body is fixed to the top end of the storage box. When in use, the pump body is started and injects hot oil in the storage box into the second pipeline through the first pipeline, the corrugated pipe, the electromagnetic valve and the multi-head pipe, so that the movable mold is heated and insulated, the flowability of injected raw materials is ensured, and then the hot oil flows back into the storage box through the multi-head pipe, the corrugated pipe and the first pipeline on the other side.

Description

Technical Field

[0001] The utility model relates to the field of die equipment, in particular to a low-pressure injection molding die. Background Technique

[0002] At present, when an injection mold is in use, the raw material is melted and then injected into the mold. For a low-pressure injection mold, after the raw material is injected, the pressure is relatively low, and the raw material cannot quickly fill the inside of the mold. When the raw material is flowing, there is no heat to heat the raw material at this time, which reduces the fluidity of the raw material. As a result, some raw materials will solidify in advance, causing defects or even scrapping of the product. Therefore, there is an urgent need for a device to solve the above problems. Content of the Utility Model

[0003] The purpose of the utility model is to provide a low-pressure injection molding die to solve the problems in the above background technique that for a low-pressure injection mold, after the raw material is injected, the pressure is relatively low, the raw material cannot quickly fill the inside of the mold, and when the raw material is flowing, there is no heat to heat the raw material at this time, which reduces the fluidity of the raw material. As a result, some raw materials will solidify in advance, causing defects or even scrapping of the product.

[0004] To achieve the above object, the present utility model provides the following technical solutions: A low-pressure injection molding die, including a fixed die, hydraulic rods are fixedly arranged on both sides of the fixed die, a movable die is fixedly arranged at the top of the hydraulic rods, a positioning mechanism for facilitating mold closing is arranged between the fixed die and the movable die. During use, the hydraulic rods drive the movable die to move up and down, thus controlling the opening and closing of the fixed die and the movable die. A heat preservation mechanism is arranged on one side of the fixed die, and a cooling mechanism is arranged on the other side. The heat preservation mechanism includes a storage tank, a pump body, a first pipeline, a connection valve, a corrugated pipe, an electromagnetic valve, a multi-head pipe and a second pipeline. The pump body is fixed on the top of the storage tank, the input end of the pump body extends into the storage tank through a pipeline, the first pipeline is installed on the top of the pump body, the connection valve is fixed on one side of the first pipeline, the corrugated pipe is fixed on one side of the first pipeline through the connection valve, the electromagnetic valve is fixed on one side of the corrugated pipe, the multi-head pipe is inlaid and fixed on one side of the electromagnetic valve, and the second pipeline is fixed on one side of the multi-head pipe. The heat preservation mechanism and the cooling mechanism have the same structure. The storage tank of the heat preservation mechanism stores heat preservation hot oil, and the storage tank of the cooling mechanism stores cooling cold oil. During use, the pump body is started, and the pump body injects the hot oil in the storage tank into the second pipeline through the first pipeline, the corrugated pipe, the electromagnetic valve and the multi-head pipe, thus heating and insulating the movable die to ensure the fluidity of the injected raw material. Then the hot oil flows back into the storage tank through the multi-head pipe, the corrugated pipe and the first pipeline on the other side. When cooling is required, at this time, the electromagnetic valve corresponding to the hot oil is closed, the electromagnetic valve corresponding to the cold oil is started, and the pump body is started to inject the cold oil into the second pipeline, and then flows back through the pipeline on the other side, thus quickly cooling the raw material injected into the die.

[0005] Preferably, the positioning mechanism includes a positioning groove and a positioning rod. The positioning groove is opened at the top of the fixed die, and the positioning rod is fixed at the bottom of the movable die. During use, the positioning rod penetrates into the positioning groove to assist the accurate mold closing of the fixed die and the movable die.

[0006] Preferably, the second pipeline is fixedly passed through the movable die.

[0007] Preferably, an electric heating tube is fixed inside the storage tank of the heat preservation mechanism.

[0008] Preferably, a refrigeration plate is inlaid and fixedly arranged at the side position of the storage tank of the cooling mechanism, and a heat dissipation fan is fixed at the heat generating end of the refrigeration plate.

[0009] Preferably, the number of the positioning rods is the same as that of the positioning grooves and they fit each other.

[0010] Compared with the prior art, the beneficial effects of the present utility model are:

[0011] When the utility model is in use, the pump body is started, and the hot oil inside the storage tank is injected into the second pipeline through the first pipeline, the corrugated pipe, the solenoid valve, and the multi-head pipe, so as to heat and keep warm the movable mold, ensure the fluidity of the injected raw material, and ensure that the raw material can fill the mold. Then, the hot oil flows back into the storage tank through the multi-head pipe, the corrugated pipe, and the first pipeline on the other side;

[0012] When the utility model needs to be cooled down, at this time, the solenoid valve corresponding to the hot oil is closed, the solenoid valve corresponding to the cold oil is started, and the pump body is started to inject the cold oil into the second pipeline, and then it flows back through the pipeline on the other side, so as to quickly cool the raw material injected into the mold. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the overall structure of a low-pressure injection molding mold of the utility model;

[0014] Figure 2 It is a bottom view of a low-pressure injection molding mold of the utility model;

[0015] Figure 3 It is an enlarged schematic view of A of a low-pressure injection molding mold of the utility model.

[0016] In the figure: 1. Fixed mold; 2. Movable mold; 3. Storage tank; 4. Pump body; 5. First pipeline; 6. Second pipeline; 7. Multi-head pipe; 8. Corrugated pipe; 9. Solenoid valve; 10. Positioning groove; 11. Positioning rod; 12. Connecting valve; 13. Hydraulic rod. Detailed Embodiment

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Please refer to Figures 1-3, the present utility model provides a technical solution: a low-pressure injection molding die, including a fixed die 1. Hydraulic rods 13 are fixed on both sides of the fixed die 1 through mounting frames. The top ends of the hydraulic rods 13 are fixed with a movable die 2 by bolts. There is a positioning mechanism between the fixed die 1 and the movable die 2 to facilitate mold closing. During use, the hydraulic rods 13 drive the movable die 2 to move up and down, thus controlling the opening and closing of the fixed die 1 and the movable die 2. One side of the fixed die 1 has a heat preservation mechanism, and the other side has a cooling mechanism. The heat preservation mechanism includes a storage tank 3, a pump body 4, a first pipeline 5, a connection valve 12, a corrugated pipe 8, a solenoid valve 9, a multi-head pipe 7, and a second pipeline 6. The pump body 4 is fixed on the top of the storage tank 3 through a mounting frame. The input end of the pump body 4 extends into the storage tank 3 through a pipeline. The first pipeline 5 is installed on the top of the pump body 4 by threading. The connection valve 12 is welded and fixed on one side of the first pipeline 5. The corrugated pipe 8 is fixed on one side of the first pipeline 5 through the connection valve 12. The solenoid valve 9 is fixed on one side of the corrugated pipe 8 by threading. The multi-head pipe 7 is embedded and fixed on one side of the solenoid valve 9. The second pipeline 6 is fixed on one side of the multi-head pipe 7 by threading. The second pipeline 6 is fixedly passed through the movable die 2. The heat preservation mechanism and the cooling mechanism have the same structure. The storage tank 3 of the heat preservation mechanism stores heat-preserving hot oil, and the storage tank 3 of the cooling mechanism stores cooling cold oil. An electric heating tube is fixed in the storage tank 3 of the heat preservation mechanism through a mounting frame. A refrigeration plate is embedded and fixed at the side position of the storage tank 3 of the cooling mechanism, and a heat dissipation fan is fixed at the heating end of the refrigeration plate through a mounting frame. During use, the pump body 4 is started. The pump body 4 injects the hot oil in the storage tank 3 into the second pipeline 6 through the first pipeline 5, the corrugated pipe 8, the solenoid valve 9, and the multi-head pipe 7, thus heating and insulating the movable die 2 to ensure the fluidity of the injected raw material. Then the hot oil flows back to the storage tank 3 through the multi-head pipe 7, the corrugated pipe 8, and the first pipeline 5 on the other side. When cooling is required, at this time, the solenoid valve 9 corresponding to the hot oil is closed, the solenoid valve 9 corresponding to the cold oil is started, and the pump body 4 is started to inject the cold oil into the second pipeline 6, and then flows back through the pipeline on the other side, thus quickly cooling the injected raw material inside the die.

[0019] In one case of this embodiment, the positioning mechanism includes a positioning groove 10 and a positioning rod 11. The positioning groove 10 is opened at the top of the fixed die 1. The positioning rod 11 is welded and fixed at the bottom end of the movable die 2. The number of the positioning rods 11 is the same as that of the positioning grooves 10 and they fit each other. During use, the positioning rod 11 penetrates into the positioning groove 10 to assist the accurate mold closing of the fixed die 1 and the movable die 2.

[0020] Working principle: When the utility model is in use, the pump body 4 is started. The pump body 4 injects the hot oil inside the storage tank 3 into the second pipeline 6 through the first pipeline 5, the corrugated pipe 8, the solenoid valve 9, and the multi-head pipe 7, so as to heat and keep warm the movable mold 2, ensuring the fluidity of the injected raw materials. Then, the hot oil flows back to the storage tank 3 through the multi-head pipe 7, the corrugated pipe 8, and the first pipeline 5 on the other side. When cooling is required, at this time, the solenoid valve 9 corresponding to the hot oil is closed, the solenoid valve 9 corresponding to the cold oil is started, and the pump body 4 is started to inject the cold oil into the second pipeline 6, and then it flows back through the pipeline on the other side, so as to quickly cool the raw materials injected into the mold. It has the advantages of simple structure, convenient use, and good use effect.

[0021] It should be noted that the hydraulic rod is an existing mature technology, so it is not described in detail. At the same time, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0022] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A low-pressure injection molding die, comprising a fixed die (1), characterized in that: On both sides of the fixed mold (1), hydraulic rods (13) are fixedly arranged. At the top of the hydraulic rods (13), a movable mold (2) is fixedly arranged. A positioning mechanism for facilitating mold closing is arranged between the fixed mold (1) and the movable mold (2). A heat preservation mechanism is arranged on one side of the fixed mold (1), and a cooling mechanism is arranged on the other side. The heat preservation mechanism includes a storage tank (3), a pump body (4), a first pipeline (5), a connection valve (12), a corrugated pipe (8), a solenoid valve (9), a multi-head pipe (7) and a second pipeline (6). The pump body (4) is fixed on the top of the storage tank (3). The input end of the pump body (4) extends into the storage tank (3) through a pipeline. The first pipeline (5) is installed on the top of the pump body (4). The connection valve (12) is fixed on one side of the first pipeline (5). The corrugated pipe (8) is fixed on one side of the first pipeline (5) through the connection valve (12). The solenoid valve (9) is fixed on one side of the corrugated pipe (8). The multi-head pipe (7) is fixedly embedded on one side of the solenoid valve (9). The second pipeline (6) is fixed on one side of the multi-head pipe (7). The heat preservation mechanism and the cooling mechanism have the same structure.

2. The low-pressure injection molding die according to claim 1, characterized in that: The positioning mechanism includes a positioning groove (10) and a positioning rod (11). The positioning groove (10) is opened at the top of the fixed mold (1). The positioning rod (11) is fixed at the bottom end of the movable mold (2).

3. A low-pressure injection molding die according to claim 2, characterized in that: The second pipeline (6) is fixedly passed through the movable mold (2).

4. A low-pressure injection molding die according to claim 3, characterized in that: An electric heating tube is fixed inside the storage tank (3) of the heat preservation mechanism.

5. A low-pressure injection molding die according to claim 4, characterized in that: A refrigeration plate is fixedly embedded at the side position of the storage tank (3) of the cooling mechanism, and a heat dissipation fan is fixed at the heat generating end of the refrigeration plate.

6. The low-pressure injection molding die according to claim 5, characterized in that: The number of the positioning rods (11) is the same as that of the positioning grooves (10), and they fit each other.

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