Cooling device for injection mold of automobile plastic part

Abstract

The utility model belongs to the technical field of injection mold cooling devices, and discloses an automobile plastic part injection mold cooling device which comprises a bottom plate, a lower mold, a top plate, an upper mold, guide columns and a lifting mechanism, the lower mold is fixedly arranged on the bottom plate, the upper mold is fixedly arranged on the top plate, and the bottom plate is fixed to the top plate through the guide columns. The lifting mechanism is fixedly arranged on the top plate and used for driving the upper die to move in the vertical direction, every two guide columns form a set, center channels are formed in the two guide columns, a liquid inlet channel and a liquid outlet channel are formed in the bottom plate, a lower cooling inner cavity is formed in the lower die, and an upper cooling inner cavity is formed in the upper die. A liquid inlet guide pipe, a liquid return guide pipe and a circulating cooling mechanism are respectively arranged between the top plate and the upper die; according to the utility model, the molding rate of injection products can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to injection mold cooling device technical field, concretely is a kind of automobile plastic injection mold cooling device. BACKGROUND

[0002] In the process of automobile injection molding production, generally after the upper die and lower die are combined, since the temperature of injection product is higher, it needs to be cooled by cooling device, and the conventional cooling method is cooled by air cooling, but the cooling efficiency of this cooling method needs to be improved, and guide column is generally needed between the upper die and lower die to guide, to improve the stability of movement, but guide column also makes the temperature of the position contacted with upper die sharply rise in the process of upper die movement, keeps high temperature for a long time, which can affect the precision when upper die and lower die are combined, so the above technical problems need to be solved. UTILITY MODEL CONTENTS

[0003] In view of the above situation, to overcome the defects of prior art, the utility model provides a kind of automobile plastic injection mold cooling device, effectively solve the problem that the conventional cooling method is cooled by air cooling, but the cooling efficiency of this cooling method needs to be improved, and guide column also makes the temperature of the position contacted with upper die sharply rise in the process of upper die movement, keeps high temperature for a long time, which can affect the precision when upper die and lower die are combined.

[0004] To achieve the above purpose, the utility model provides the following technical scheme: a kind of automobile plastic injection mold cooling device, including bottom plate, lower die, top plate, upper die, guide column and lifting mechanism, lower die is fixedly arranged on bottom plate, upper die is fixedly arranged on top plate, bottom plate is fixed with top plate by multiple guide columns, lifting mechanism is fixedly arranged on top plate and is used to drive upper die to move in vertical direction, the guide column two are a group, two guide columns are all provided with central passage, bottom plate is provided with inlet passage and outlet passage, lower die is formed with lower cooling inner cavity, upper die is formed with upper cooling inner cavity, top plate and upper die are also respectively provided with inlet pipe, return pipe and circulating cooling mechanism, one end of circulating cooling mechanism and the central passage in one of guide columns are communicated, the central passage in one of guide columns is sequentially communicated with the other end of circulating cooling mechanism through inlet passage, lower cooling inner cavity, outlet passage, the central passage in the other guide column, inlet pipe, upper cooling inner cavity and return pipe.

[0005] Preferably, the lifting mechanism includes an electric push rod, which is fixedly arranged on the top plate, and the output end of the electric push rod is fixedly arranged with the upper die.

[0006] Preferably, the inside of the lower cooling inner cavity and the inside of the upper cooling inner cavity are both fixedly provided with a plurality of heat-conducting plates, and a plurality of through holes are formed in each heat-conducting plate.

[0007] Preferably, the circulating cooling mechanism comprises a cooling box and a pump body, the cooling box is fixedly arranged on the top plate, the pump body is fixedly arranged on the cooling box, one end of the pump body is fixedly communicated with the cooling box, the other end of the pump body is fixedly communicated with the liquid return pipe, the liquid return pipe is fixedly communicated with the inside of the cooling box; wherein the inside of the cooling box is communicated with the air outlet end of the external refrigeration equipment; and a pressure relief valve is fixedly arranged on the cooling box.

[0008] Preferably, the inside of the cooling box is divided into a water storage cavity and a cooling cavity by a partition plate, the water storage cavity is communicated with the cooling cavity, one end of the pump body is communicated with the water storage cavity, the liquid return pipe is communicated with the cooling cavity, and the air outlet end of the external refrigeration equipment is communicated with the cooling cavity.

[0009] Preferably, the guide column is provided with two groups, each group is provided with two guide columns, and the line between the two guide columns in the same group is parallel to the length direction of the top plate.

[0010] Preferably, the outer wall of the upper die is fixedly provided with a guide ring, the guide ring is slidingly matched with the guide column and is arranged one by one in correspondence, an inner cooling cavity is formed in the guide ring, a connecting hole is formed in the upper die, and the liquid inlet pipe is communicated with the upper cooling inner cavity through the inner cooling cavity and the connecting hole in sequence.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] In work, through the cooperation of the circulating cooling mechanism, the upper cooling inner cavity, the lower cooling inner cavity, the inner cooling cavity and the central channel, the cooling rate of the upper die and the lower die can be accelerated by liquid cooling after injection molding, so that the molding rate of the injection molded product is improved; and since the liquid flows through the guide ring and the guide column, the guide ring and the guide column can be cooled respectively, so that the temperature of the contact part is prevented from rising sharply due to friction, so that the long-term use performance of the guide ring and the guide column is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0013] The drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, and are used together with the embodiments of the utility model to explain the utility model, and do not constitute a limitation on the utility model.

[0014] In the drawings:

[0015] Figure 1 It is a structure schematic view of the cooling device of the automobile plastic part injection mold of the utility model;

[0016] Figure 2The sectional view structure schematic diagram of the utility model;

[0017] Figure 3 The cooling box internal structure schematic diagram of the utility model;

[0018] Figure 4 The cooling box internal structure schematic diagram of the utility model; Figure 2 The A place enlarged structure schematic diagram of the utility model;

[0019] Figure 5 The cooling box internal structure schematic diagram of the utility model; Figure 2 The B place enlarged structure schematic diagram of the utility model.

[0020] In the drawing: 1, bottom plate; 2, lower mould; 3, top plate; 4, guide column; 5, central passage; 6, liquid inlet passage; 7, liquid outlet passage; 8, lower cooling inner cavity; 9, upper cooling inner cavity; 10, liquid inlet guide pipe; 11, liquid return guide pipe; 12, cooling box; 13, pump body; 14, partition; 15, water storage cavity; 16, cooling cavity; 17, guide ring; 18, inner cooling cavity; 19, connecting hole; 20, electric push rod; 21, upper mould; 22, heat conduction plate; 23, through hole. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments; based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts fall within the protection scope of the utility model.

[0022] By Figures 1-5 The utility model relates to a kind of cooling device of automobile plastic injection mould, including bottom plate 1, lower mould 2, top plate 3, upper mould 21, guide column 4 and lifting mechanism, lower mould 2 is fixedly set on bottom plate 1, upper mould 21 is fixedly set on top plate 3, bottom plate 1 is fixed with top plate 3 by multiple guide columns 4, lifting mechanism is fixedly set on top plate 3 and is used to drive upper mould 21 movement in vertical direction;Such design, when using, upper mould 21 is driven to move down by lifting mechanism, so that guide ring 17 on upper mould 21 moves along guide column 4, when upper mould 21 and lower mould 2 are combined, it can be injected into the space formed by the combination of upper mould 21 on self injection port, when raw material is cooled, it can be driven to move up by lifting mechanism, so that upper mould 21 and lower mould 2 are separated, then injection product can be taken out after cooling, and ejection mechanism, such as telescopic pneumatic cylinder, can be set in the inside of lower mould 2, so that injection product is ejected from lower mould 2, to complete the injection molding operation of automobile plastic part.

[0023] Considering that the temperature of the raw material is high when injection molding, the cooling of the injection molded product needs to be further accelerated after the injection molding is completed, so that the two guide columns 4 are grouped, the center channel 5 is formed in each of the two guide columns 4, the liquid inlet channel 6 and the liquid outlet channel 7 are formed in the bottom plate 1, the lower cooling inner cavity 8 is formed in the lower mold 2, the upper cooling inner cavity 9 is formed in the upper mold 21, the liquid inlet pipe 10, the liquid return pipe 11 and the circulating cooling mechanism are further arranged between the top plate 3 and the upper mold 21, one end of the circulating cooling mechanism is communicated with the center channel 5 in one of the guide columns 4, and the center channel 5 in one of the guide columns 4 is communicated with the other end of the circulating cooling mechanism in sequence through the liquid inlet channel 6, the lower cooling inner cavity 8, the liquid outlet channel 7, the center channel 5 in the other guide column 4, the liquid inlet pipe 10, the upper cooling inner cavity 9 and the liquid return pipe 11.

[0024] In this way, when cooling is needed after the injection molding is completed, the liquid is injected into the inside of the lower cooling inner cavity 8 through the circulating cooling mechanism and the guide column 4 and the liquid inlet channel 6 in sequence, the lower mold 2 is cooled, then the liquid enters the upper cooling inner cavity 9 through the liquid outlet channel 7, the center channel 5 in the other guide column 4, the liquid inlet pipe 10 in sequence, the upper mold 21 is cooled, then the liquid returns to the inside of the circulating cooling mechanism through the liquid return pipe 11, the liquid with a high temperature is cooled, the liquid circulates to realize the rapid cooling process of the upper mold 21 and the lower mold 2; since the liquid flows through the guide column 4, the guide column 4 can also be cooled.

[0025] Specifically, the guide column 4 is provided with two groups, each group of guide columns 4 is provided with two, and the connecting line between the two guide columns 4 in the same group is parallel to the length direction of the top plate 3.

[0026] Specifically, the lifting mechanism includes an electric push rod 20, the electric push rod 20 is fixedly arranged on the top plate 3, and the output end of the electric push rod 20 is fixedly arranged with the upper mold 21.

[0027] Further, a plurality of heat conduction plates 22 are fixedly arranged in the inside of the lower cooling inner cavity 8 and the inside of the upper cooling inner cavity 9, and a plurality of through holes 23 are formed in each heat conduction plate 22; in this way, the contact area with the liquid can be expanded through the heat conduction plate 22, so as to accelerate the cooling rate, and the through holes 23 can slow down the flow rate of the liquid, so as to make the liquid maintain a certain contact time with the lower cooling inner cavity 8 or the upper cooling inner cavity 9, and ensure the cooling effect.

[0028] Specifically, the circulating cooling mechanism comprises a cooling box 12 and a pump body 13, the cooling box 12 is fixedly arranged on the top plate 3, the pump body 13 is fixedly arranged on the cooling box 12, one end of the pump body 13 is fixedly communicated with the cooling box 12, the other end of the pump body 13 is fixedly communicated with the liquid return pipe 11, the liquid return pipe 11 is fixedly communicated with the inside of the cooling box 12; wherein the inside of the cooling box 12 is communicated with the gas outlet end of the external refrigeration device; and the cooling box 12 is fixedly provided with a pressure relief valve; the inside of the cooling box 12 is divided into a water storage cavity 15 and a cooling cavity 16 by a partition plate 14, the water storage cavity 15 is communicated with the cooling cavity 16, wherein one end of the pump body 13 is communicated with the water storage cavity 15, the liquid return pipe 11 is communicated with the cooling cavity 16, and the gas outlet end of the external refrigeration device is communicated with the cooling cavity 16;

[0029] In this way, the liquid in the water storage cavity 15 is transported into the cooling circuit through the pump body 13, and finally the liquid after the cooling circuit returns to the inside of the cooling cavity 16 through the liquid return pipe 11, so that cold air is generated by the external refrigeration device to reduce the temperature of the liquid and ensure the cooling effect in the circulating cooling process.

[0030] Further, the outer wall of the upper die 21 is fixedly provided with a guide ring 17, the guide ring 17 is slidingly matched with the guide column 4 and is arranged one by one, the guide ring 17 is formed with an inner cooling cavity 18, the upper die 21 is provided with a connecting hole 19, and the liquid inlet pipe 10 is communicated with the upper cooling cavity 9 through the inner cooling cavity 18 and the connecting hole 19 in sequence; in this way, when the guide ring 17 and the guide column 4 move relatively, the temperature of the guide ring 17 will rise rapidly due to the small inner side area of the guide ring 17 and the friction with the guide column 4, and when the liquid flows through the inner cooling cavity 18 in the guide ring 17, the guide ring 17 can be cooled to ensure the use performance of the guide ring 17.

Claims

1. A cooling device for an injection mold of automotive plastic parts, comprising a base plate (1), a lower mold (2), a top plate (3), an upper mold (21), guide pillars (4), and a lifting mechanism, wherein the lower mold (2) is fixedly disposed on the base plate (1), the upper mold (21) is fixedly disposed on the top plate (3), the base plate (1) is fixed to the top plate (3) by a plurality of guide pillars (4), and the lifting mechanism is fixedly disposed on the top plate (3) and is used to drive the upper mold (21) to move in the vertical direction, characterized in that, The guide pillars (4) are arranged in pairs. A central channel (5) is provided in each of the two guide pillars (4). An inlet channel (6) and an outlet channel (7) are provided in the bottom plate (1). A lower cooling cavity (8) is formed in the lower mold (2). An upper cooling cavity (9) is formed in the upper mold (21). An inlet conduit (10), a return conduit (11) and a circulating cooling mechanism are respectively provided between the top plate (3) and the upper mold (21). One end of the circulating cooling mechanism is connected to the central channel (5) in one of the guide pillars (4). The central channel (5) in one of the guide pillars (4) is connected to the other end of the circulating cooling mechanism in sequence through the inlet channel (6), the lower cooling cavity (8), the outlet channel (7), the central channel (5) in the other guide pillar (4), the inlet conduit (10), the upper cooling cavity (9) and the return conduit (11).

2. The cooling device for an automotive plastic injection mold according to claim 1, characterized in that: The lifting mechanism includes an electric push rod (20), which is fixedly mounted on the top plate (3), and the output end of the electric push rod (20) is fixedly mounted on the upper mold (21).

3. The cooling device for an automotive plastic injection mold according to claim 1, characterized in that: Multiple heat-conducting plates (22) are fixedly installed inside the lower cooling cavity (8) and the upper cooling cavity (9), and multiple through holes (23) are opened on each heat-conducting plate (22).

4. The cooling device for an automotive plastic injection mold according to claim 1, characterized in that: The circulating cooling mechanism includes a cooling tank (12) and a pump body (13). The cooling tank (12) is fixedly installed on the top plate (3), and the pump body (13) is fixedly installed on the cooling tank (12). One end of the pump body (13) is fixedly connected to the cooling tank (12), and the other end of the pump body (13) is fixedly connected to the return liquid conduit (11). The return liquid conduit (11) is fixedly connected to the interior of the cooling tank (12). The interior of the cooling tank (12) is connected to the air outlet of the external refrigeration equipment. A pressure relief valve is fixedly installed on the cooling tank (12).

5. A cooling device for an automotive plastic injection mold according to claim 4, characterized in that: The interior of the cooling box (12) is divided into a water storage chamber (15) and a cooling chamber (16) by a partition (14). The water storage chamber (15) and the cooling chamber (16) are connected. One end of the pump body (13) is connected to the water storage chamber (15), the return pipe (11) is connected to the cooling chamber (16), and the outlet of the external refrigeration equipment is connected to the cooling chamber (16).

6. A cooling device for an automotive plastic injection mold according to claim 1, characterized in that: The guide pillars (4) are provided in two sets, with two guide pillars (4) in each set. The line connecting the two guide pillars (4) in the same set is parallel to the length direction of the top plate (3).

7. A cooling device for an automotive plastic injection mold according to claim 1, characterized in that: A guide ring (17) is fixedly provided on the outer wall of the upper mold (21). The guide ring (17) and the guide post (4) are slidably engaged and correspondingly provided. An inner cooling cavity (18) is formed inside the guide ring (17). A connecting hole (19) is provided on the upper mold (21). The liquid inlet conduit (10) communicates with the upper cooling inner cavity (9) through the inner cooling cavity (18) and the connecting hole (19) in sequence.

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