A plastic mold press device

Abstract

This application relates to the field of die-casting equipment technology and discloses a plastic mold die-casting device, including a worktable. A hydraulic rod is fixedly connected to the top of the worktable, and an upper mold is fixedly connected to the telescopic end of the hydraulic rod. A lower mold is attached to the bottom of the upper mold. A first loop-shaped pipe is provided inside the upper mold. A connector is fixedly connected to the top of the first loop-shaped pipe, and a spray pipe is fixedly connected to the top of the connector. Multiple water outlet limiting pipes are fixedly connected to the bottom of the first loop-shaped pipe. A receiving pipe is sleeved on the outer wall surface of the water outlet limiting pipe, and a second loop-shaped pipe is fixedly connected to the bottom of the receiving pipe. The loop-shaped pipe layout allows the cooling liquid to fully contact the inside of the mold, effectively remove heat, reduce the overall temperature of the mold, thereby shortening the cooling time after the casting is removed, improving production efficiency, ensuring the quality of the casting, and avoiding defects caused by local overheating.

Description

Technical Field

[0001] This application relates to the field of die-casting equipment technology, and in particular to a plastic mold die-casting equipment. Background Technology

[0002] A plastic mold is a special tool used for mass production of plastic products. It has a cavity inside that matches the shape of the product. Molten plastic is filled into the cavity through processes such as injection molding, die casting, or blow molding. After cooling and solidification, the mold is demolded to obtain a plastic part with a specific geometry and size.

[0003] In related technologies, plastic molds are mainly cooled by water or air. Cooling water is driven by a water pump to remove heat from the mold. This cooling method is simple and low-cost. However, because the mold is thick, the cooling water has difficulty reaching the inside of the mold. As a result, the surface of the casting still has a high temperature after the mold is opened. When the casting needs to be removed, it still takes a long time to cool it down. Utility Model Content

[0004] To address the problem of low mold cooling efficiency leading to long demolding cycles mentioned above, this application provides a plastic mold die-casting device.

[0005] The plastic mold die-casting device provided in this application adopts the following technical solution:

[0006] A plastic mold die-casting device includes a worktable. A hydraulic rod is fixedly connected to the top of the worktable. An upper mold is fixedly connected to the telescopic end of the hydraulic rod. A lower mold is attached to the bottom of the upper mold. A first loop-shaped pipe is provided inside the upper mold. A connector is fixedly connected to the top of the first loop-shaped pipe. A spray pipe is fixedly connected to the top of the connector. Multiple water outlet limiting pipes are fixedly connected to the bottom of the first loop-shaped pipe. A receiving pipe is sleeved on the outer wall surface of the water outlet limiting pipe. A second loop-shaped pipe is fixedly connected to the bottom of the receiving pipe. The second loop-shaped pipe is located inside the lower mold. A drain pipe is fixedly connected to the bottom of the lower mold and extends to the outside of the lower mold.

[0007] Preferably, the inlet is funnel-shaped, with the larger end of the inlet facing the spray pipe and the smaller end fixedly connected to the first loop pipe.

[0008] Preferably, the outlet limiting pipes are symmetrically distributed along the bottom of the first loop pipe, and the outlet limiting pipes and the receiving pipe form a sliding seal connection, with a sealing rubber ring provided at the connection between the outlet limiting pipes and the receiving pipe.

[0009] Preferably, the bottom of the drain pipe is provided with a filter screen, the bottom of the filter screen is fixedly connected to a water tank, one side of the water tank is connected to a chiller through a pipe, the side of the chiller away from the water tank is connected to a transmission pipe through a flange, one end of the transmission pipe is flanged to a water pump, the top flange of the water pump is connected to a water supply pipe, and one end of the water supply pipe is fixedly connected to a spray pipe.

[0010] Preferably, the bottom of the water tank is inclined, having a lower side and a horizontal side, wherein the lower side is close to the refrigeration unit.

[0011] Preferably, a baffle is provided on one side of the top of the workbench, and a sliding door is slidably connected to the top of the baffle. The sliding door is made of transparent material, and the top of the workbench is provided with multiple through holes, which are located above the filter screen.

[0012] Preferably, an electromagnetic temperature regulating valve is provided on the pipeline between the refrigeration unit and the water tank.

[0013] Preferably, the first loop pipe and the second loop pipe are made of the same material, copper alloy.

[0014] In summary, this application includes the following beneficial technical effects:

[0015] (i) When it is necessary to cool the mold, the cooling liquid enters the first loop pipe from the spray pipe through the inlet, directly contacts the inside of the upper mold and absorbs heat, then flows into the receiving pipe through the water outlet limit pipe, and then enters the second loop pipe to cool the inside of the lower mold. This loop pipe layout allows the cooling liquid to fully contact the inside of the mold, effectively remove heat, reduce the overall temperature of the mold, thereby shortening the cooling time after the casting is taken out, improving production efficiency, ensuring the quality of the casting, and avoiding defects caused by local overheating.

[0016] (ii) The cooling liquid discharged from the drain pipe carries the heat of the mold. It first passes through a filter screen, which intercepts impurities in the cooling liquid, allowing clean cooling liquid to enter the water tank. The water tank stores the cooling liquid, which then flows through pipes to the chiller, where it is cooled to lower its temperature. The cooled cooling liquid then flows through a transfer pipe to the water pump, which pressurizes the cooling liquid and delivers it back to the spray pipe through the supply pipe, forming a circulating cooling system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the workbench of this utility model.

[0019] Figure 3This is a schematic diagram of the cross-sectional structure of the upper and lower molds of this utility model.

[0020] Figure 4 This is a schematic diagram of the spray pipe structure of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Workbench; 101. Hydraulic rod; 102. Upper mold; 103. Lower mold; 2. Connection port; 201. First loop pipe; 202. Water outlet limit pipe; 203. Receiving pipe; 204. Second loop pipe; 205. Drain pipe; 3. Filter screen; 301. Water tank; 302. Refrigeration unit; 303. Transmission pipe; 304. Water pump; 305. Water supply pipe; 306. Spray pipe; 4. Baffle; 401. Through hole. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0023] Reference Figure 1-4 This utility model provides a plastic mold die-casting device, including a workbench 1. A hydraulic rod 101 is fixedly connected to the top of the workbench 1. An upper mold 102 is fixedly connected to the telescopic end of the hydraulic rod 101. A lower mold 103 is attached to the bottom of the upper mold 102. A first loop pipe 201 is provided inside the upper mold 102. A connector 2 is fixedly connected to the top of the first loop pipe 201. A spray pipe 306 is fixedly connected to the top of the connector 2. Multiple water outlet limiting pipes 202 are fixedly connected to the bottom of the first loop pipe 201. A receiving pipe 203 is sleeved on the outer wall surface of the water outlet limiting pipe 202. A second loop pipe 204 is fixedly connected to the bottom of the receiving pipe 203. The second loop pipe 204 is located inside the lower mold 103. A drain pipe 205 is fixedly connected to the bottom of the lower mold 103 and extends to the outside of the lower mold 103.

[0024] When plastic mold die casting is performed, the hydraulic rod 101 is activated, and its telescopic end drives the upper mold 102 to move downward until the upper mold 102 and the lower mold 103 are tightly fitted together, thus completing the die casting action.

[0025] After die casting is completed, cooling liquid flows in from the spray pipe 306 and enters the first loop pipe 201 through the inlet 2. The cooling liquid in the first loop pipe 201 absorbs heat from the upper mold 102 and then flows out through multiple outlet limiting pipes 202. The receiving pipe 203 outside the outlet limiting pipe 202 receives the cooling liquid flowing out from the outlet limiting pipe 202 and guides it to the second loop pipe 204. The cooling liquid in the second loop pipe 204 continues to absorb heat from the lower mold 103, and finally the cooling liquid is discharged from the drain pipe 205. The outlet limiting pipe 202 and the receiving pipe 203 are connected by a sliding seal to maintain the continuity of the pipeline. At the same time, this structure can play an auxiliary guiding role during mold closing, ensuring that the upper mold 102 and the lower mold 103 are accurately aligned and reducing the risk of misalignment.

[0026] Cooling liquid enters the first loop pipe 201 from the spray pipe 306 through the inlet 2, directly contacts the inside of the upper mold 102 and absorbs heat, then flows into the receiving pipe 203 through the water outlet limit pipe 202, and then enters the second loop pipe 204 to cool the inside of the lower mold 103. This loop pipe layout allows the cooling liquid to fully contact the inside of the mold, effectively remove heat, reduce the overall temperature of the mold, thereby shortening the cooling time after the casting is taken out, improving production efficiency, ensuring the quality of the casting, and avoiding defects caused by local overheating.

[0027] In a preferred embodiment, the inlet 2 is trumpet-shaped, with the larger end of the inlet 2 facing the spray pipe 306 and the smaller end fixedly connected to the first loop pipe 201.

[0028] The inlet 2 is funnel-shaped, with its larger end facing the spray pipe 306 and its smaller end fixedly connected to the first loop pipe 201. When the coolant flows out of the spray pipe 306, due to the guiding effect of the larger end of the inlet 2, the coolant can enter the inlet 2 more smoothly, and then enter the first loop pipe 201 through the smaller end. The funnel-shaped inlet 2 increases the inlet area for the coolant to enter the first loop pipe 201.

[0029] In a preferred embodiment, the outlet limiting pipe 202 is symmetrically distributed along the bottom of the first loop pipe 201, and the outlet limiting pipe 202 and the receiving pipe 203 form a sliding seal connection, with a sealing rubber ring provided at the connection between the outlet limiting pipe 202 and the receiving pipe 203.

[0030] The symmetrically distributed outlet limiting pipes 202 ensure that the cooling liquid flows evenly into the second loop pipe 204, improving the cooling effect. The sealing ring prevents cooling liquid leakage. The sealing ring is not shown in the attached diagram.

[0031] In a preferred embodiment, a filter screen 3 is provided at the bottom of the drain pipe 205, and a water tank 301 is fixedly connected to the bottom of the filter screen 3. A chiller 302 is connected to one side of the water tank 301 through a pipe. A transmission pipe 303 is connected to the side of the chiller 302 away from the water tank 301 through a flange. A water pump 304 is connected to one end of the transmission pipe 303 through a flange. A water supply pipe 305 is connected to the top flange of the water pump 304. One end of the water supply pipe 305 is fixedly connected to the spray pipe 306.

[0032] The coolant discharged from drain pipe 205 carries the heat from the mold. It first passes through filter screen 3, which intercepts impurities, allowing the clean coolant to enter water tank 301. Water tank 301 stores the coolant, which then flows through pipes to chiller 302, where it is cooled to lower its temperature. The cooled coolant then flows through transfer pipe 303 to water pump 304, which pressurizes the coolant and delivers it back to spray pipe 306 through supply pipe 305, forming a circulating cooling system.

[0033] The working principle of the refrigeration unit 302 is that the refrigerant is compressed into a high-temperature and high-pressure gas in the compressor, and then liquefied by cooling water or air after entering the condenser. After passing through the expansion valve, the pressure and temperature are reduced to a gas-liquid mixture. Finally, the gas absorbs the heat of the cooled medium in the evaporator and vaporizes to achieve heat transfer.

[0034] In a preferred embodiment, the bottom of the water tank 301 is inclined, having a lower side and a horizontal side, wherein the lower side is close to the refrigeration unit 302.

[0035] The sloping bottom design allows the coolant to collect naturally, reducing coolant residue in the water tank 301 and improving coolant utilization.

[0036] In a preferred embodiment, a baffle 4 is provided on one side of the top of the workbench 1, and a sliding door is slidably connected to the top of the baffle 4. The sliding door is made of transparent material, and a plurality of through holes 401 are provided on the top of the workbench 1. The through holes 401 are located above the filter screen 3.

[0037] A baffle 4 is provided on one side of the top of the workbench 1, and a transparent sliding door is slidably connected to the top of the baffle 4. During the plastic mold die casting process, the sliding door is closed to provide protection and prevent coolant from splashing out during the spraying process. At the same time, because the sliding door is made of transparent material, the operator can observe the die casting process and the working status of the mold through the sliding door, which is not shown in the figure.

[0038] In a preferred embodiment, an electromagnetic temperature regulating valve is provided on the pipeline between the refrigeration unit 302 and the water tank 301.

[0039] The electromagnetic temperature regulating valve can monitor the temperature of the coolant in the pipeline in real time and automatically adjust the valve opening according to the set temperature value. When the temperature of the coolant is higher than the set value, the electromagnetic temperature regulating valve increases the opening, increasing the flow rate of the coolant and allowing more coolant to enter the refrigeration unit 302 for cooling; when the temperature of the coolant is lower than the set value, the electromagnetic temperature regulating valve decreases the opening, reducing the flow rate of the coolant and avoiding over-cooling.

[0040] The electromagnetic temperature regulating valve is model MXG461.20-5.0, and the refrigeration unit 302 is model SS-56EG2-8A. Both are existing technologies and will not be described in detail here.

[0041] In a preferred embodiment, the first loop 201 and the second loop 204 are both made of copper alloy. Copper alloy has good thermal conductivity, and when the cooling liquid flows in the first loop 201 and the second loop 204, it can quickly transfer the cooling capacity carried by the cooling liquid to the upper mold 102 and the lower mold 103, thereby achieving effective cooling of the mold.

[0042] The foregoing description of an exemplary embodiment of a plastic mold die-casting apparatus provided by this disclosure refers to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the spirit of this disclosure, and various combinations can be made to the various technical features and structures proposed in this disclosure without exceeding the protection scope of this disclosure, which is determined by the appended claims.

Claims

1. A plastic mold die-casting device, comprising a worktable (1), characterized in that, A hydraulic rod (101) is fixedly connected to the top of the workbench (1). An upper mold (102) is fixedly connected to the telescopic end of the hydraulic rod (101). A lower mold (103) is attached to the bottom of the upper mold (102). A first loop pipe (201) is provided inside the upper mold (102). A connector (2) is fixedly connected to the top of the first loop pipe (201). A spray pipe (306) is fixedly connected to the top of the connector (2). Multiple water outlet limiting pipes (202) are fixedly connected to the bottom of the lower mold (103). A receiving pipe (203) is sleeved on the outer wall surface of the water outlet limiting pipe (202). A second loop pipe (204) is fixedly connected to the bottom of the receiving pipe (203). The second loop pipe (204) is located inside the lower mold (103). A drain pipe (205) is fixedly connected to the bottom of the lower mold (103). The drain pipe (205) extends to the outside of the lower mold (103).

2. The plastic mold die-casting device according to claim 1, characterized in that: The inlet (2) is trumpet-shaped, with the larger end of the inlet (2) facing the spray pipe (306) and the smaller end fixedly connected to the first loop pipe (201).

3. The plastic mold die-casting device according to claim 1, characterized in that: The outlet limiting pipe (202) is symmetrically distributed along the bottom of the first loop pipe (201), and the outlet limiting pipe (202) and the receiving pipe (203) form a sliding sealing connection. A sealing ring is provided at the connection between the outlet limiting pipe (202) and the receiving pipe (203).

4. The plastic mold die-casting device according to claim 1, characterized in that: The bottom of the drain pipe (205) is provided with a filter screen (3), and the bottom of the filter screen (3) is fixedly connected to a water tank (301). A chiller (302) is connected to one side of the water tank (301) through a pipe. A transmission pipe (303) is connected to the side of the chiller (302) away from the water tank (301) through a flange. A water pump (304) is connected to one end of the transmission pipe (303) through a flange. A water supply pipe (305) is connected to the top flange of the water pump (304). One end of the water supply pipe (305) is fixedly connected to a spray pipe (306).

5. A plastic mold die-casting device according to claim 4, characterized in that: The bottom of the water tank (301) is inclined, having a lower side and a horizontal side, wherein the lower side is close to the refrigeration unit (302).

6. The plastic mold die-casting device according to claim 1, characterized in that: The workbench (1) has a baffle (4) on one side of its top. The top of the baffle (4) is slidably connected to a sliding door, which is made of transparent material. The top of the workbench (1) has multiple through holes (401), which are located above the filter screen (3).

7. A plastic mold die-casting device according to claim 4, characterized in that: An electromagnetic temperature regulating valve is installed on the pipeline between the refrigeration unit (302) and the water tank (301).

8. The plastic mold die-casting device according to claim 1, characterized in that: The first loop pipe (201) and the second loop pipe (204) are made of the same material, copper alloy.

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