Cooling structure applied to mold

Abstract

The cooling structure comprises an upper die base, a lower die base, an upper die core, a lower die core, a sliding base assembly, a side drawing rod, a bottom drawing rod and an electromagnetic valve, the upper die core is located above the moving path of the sliding base assembly and is provided with a first air hole used for cooling the side drawing rod, and the lower die base is provided with a second air hole used for cooling the bottom drawing rod. The first air hole and the second air hole are externally connected with an air source through electromagnetic valves correspondingly, and when the upper mold base and the lower mold base are closed, the first air hole is blocked by the sliding base assembly, and the second air hole is blocked by the upper mold base / upper mold core. And the production efficiency of plastic parts is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to a cooling structure applied to a mold. Background Art

[0002] Injection molds usually consist of two parts: an upper mold base assembly and a lower mold base assembly. The material molten at high temperature is filled into each mold under high pressure to produce corresponding plastic parts according to the internal shape of the mold.

[0003] In order to improve the production efficiency of plastic parts, a cooling pipeline structure is usually added to the mold. Cooling water enters the mold through the pipeline structure, thereby reducing the temperature at the mold core and accelerating the cooling and shaping of the plastic parts.

[0004] However, in the mold design process, it is often encountered that the cooling water cannot reach the parts of the plastic parts that need to be cooled due to the limitations of the plastic parts structure. For example, the parts of the plastic parts that need to be formed by the core pulling structure cannot leave processing space for the cooling water to circulate effectively due to the small cross-section of the pulling rod. This also makes this part unable to be cooled by water cooling, causing the plastic parts to deform due to uneven cooling, thereby reducing the quality of the plastic parts. Summary of the invention

[0005] In order to overcome the shortcomings of the background technology, the technical solution adopted by the present invention is: a cooling structure applied to the mold, including an upper mold base, a lower mold base, an upper mold core, a lower mold core, a slide assembly, a side pull-out rod and a bottom pull-out rod, the upper mold base and the lower mold base are respectively connected to the upper mold core and the lower mold core, the upper mold core is slidably connected to the slide assembly, and the slide assembly is provided with a side pull-out rod for core pulling, the lower mold core is fixedly connected to the bottom pull-out rod vertically distributed with the side pull-out rod, and also includes a solenoid valve for controlling the on and off of the cooling gas, the solenoid valve is fixedly connected to one side of the upper mold base and / or the lower mold base, the upper mold core is located above the moving path of the slide assembly and is provided with a first air hole for cooling the side pull-out rod, the lower mold base is provided with a second air hole for cooling the bottom pull-out rod, the first air hole and the second air hole are respectively connected to an external air source through the solenoid valve, when the upper mold base and the lower mold base are molded, the slide assembly blocks the first air hole, and the upper mold base / upper mold core blocks the second air hole.

[0006] By adopting the above technical scheme, when the upper mold base and the lower mold base are molded together, the upper mold core and the lower mold core form a cavity for injection molding. At this time, the slide assembly controls the side pull-out rod to abut against the bottom pull-out rod, and vertically distributed air holes are formed in the plastic part through the side pull-out rod and the bottom pull-out rod, and the slide assembly and the upper mold core respectively block the first air hole and the second air hole to prevent the material from flowing into the first air hole and the second air hole; when the plastic part is cooled and formed, the upper mold base and the lower mold base are separated, and the slide assembly makes the side pull-out rod move away from the bottom pull-out rod through the action of the inclined ejector rod. At this time, the first air hole and the second air hole are opened accordingly, and the solenoid valve controls the cold air to flow out from the first air hole and the second air hole respectively, thereby cooling the upper mold core, the lower mold core and the plastic part, so that the plastic part is cooled evenly as a whole, the cooling time required for the mold is reduced, and the production efficiency of the plastic part is improved. Compared with the traditional mold, its production efficiency is improved by 22%.

[0007] The present invention is further configured as follows: the upper mold base is provided with a slide groove and a first air inlet duct, the slide seat assembly is provided with a side sliding block adapted to the slide groove, the solenoid valve is connected to the first air hole through the first air inlet duct, and the opening of the first air hole is vertically downward in the direction of the side pull-out rod, and the upper mold base is provided with a transfer cavity between the first air inlet duct and the first air hole, the cross-sectional area of ​​the transfer cavity is much larger than the first air inlet duct, and can adapt to upper mold cores with different air hole positions, so that the mold frame structure can be universal.

[0008] The present invention is further configured such that the diameter of the first air inlet duct is greater than the diameter of the first air hole, and by changing the cross-sectional areas of the first air inlet duct and the first air hole, the flow rate of the gas flowing out of the first air hole is increased, thereby increasing the cooling effect of air cooling.

[0009] The present invention is further configured such that the slide seat assembly includes an inclined top seat, a sliding seat and a bushing, the inclined top seat is provided with a side sliding block and a clamping groove, and an inclined hole for guiding the movement of the side pull-out rod, the sliding seat is provided with an I-shaped portion adapted to the clamping groove, and the sliding seat is provided with an inner hole passing through the I-shaped portion, the inner hole sleeve is provided with a bushing, the bushing is provided with a first countersunk hole for installing the side pull-out rod, and the side pull-out rod is clamped between the bushing and the inclined top seat.

[0010] The present invention is further configured such that the shaft sleeve is provided with a molding cavity, the side pull-out rod and the molding cavity are combined to form a first molding cavity of the side tube portion of the plastic part, the side pull-out rod is provided with a draft surface, and by replacing the shaft sleeve with a molding cavity structure of different structures, the structure of the side tube portion of the plastic part is made different, so that the plastic part can be connected to a quick connector of a corresponding model, and has a wide range of applications.

[0011] The present invention is further configured as follows: the lower mold base is provided with an adapter seat and a second air inlet, the adapter seat is provided with an inner cavity and a second air hole, the solenoid valve is connected with the second air inlet and the inner cavity in sequence, the lower mold core is provided with a second countersunk hole, the bottom pull-out rod is vertically distributed on the lower mold base through the second countersunk hole, the opening of the second air hole is facing the direction of the bottom pull-out rod, and the upper mold base is provided with a rectangular groove adapted to the adapter seat. This structure is suitable for a structure in which the vertical hole of the injection molded part is a blind hole. When the mold is demolded, the cold air from the second air hole blows toward and cools the plastic part. After demolding, the cold air from the second air hole blows toward and cools the bottom pull-out rod.

[0012] The present invention is further configured as follows: the lower mold base includes a mold frame, a positioning plate, an adapter plate and a bottom plate which are distributed in sequence from top to bottom, the lower mold core is fixedly connected to the mold frame, the positioning plate is provided with a third countersunk hole, the bottom pull-out rod is clamped between the adapter plate and the positioning plate through the third countersunk hole, and the bottom pull-out rod sequentially passes through the positioning plate and the mold frame and extends into the lower mold core, the adapter plate is provided with a second air inlet channel, the bottom pull-out rod is provided with a second air hole running through itself, the solenoid valve is connected to the second air hole through the second air inlet channel, and when the mold is closed, the bottom pull-out rod abuts against the upper mold core / upper mold frame. This structure is suitable for a structure in which the vertical hole of the injection molded part is a through hole. When demolding, the cold air from the second air hole blows toward and cools the plastic part, and quickly cools the bottom pull-out rod from the inside to the outside.

[0013] The present invention is further configured such that a gas nozzle portion for abutting against the upper mold core / upper mold frame is provided at the top of the bottom pull-out rod, and a spherical surface is provided above the gas nozzle portion. The guidance of the spherical surface facilitates the closing of the upper mold base and the lower mold base, thereby avoiding interference with the upper mold core / upper mold frame due to installation errors of the bottom pull-out rod.

[0014] The present invention is further configured such that the diameter of the second air inlet is greater than the diameter of the second air hole, and by changing the cross-sectional area of ​​the second air inlet and the second air hole, the flow rate of the gas flowing out of the second air hole is increased, thereby increasing the cooling effect of air cooling.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. When the plastic part is cooled, shaped and demolded, the slide assembly moves the side draw rod away from the bottom draw rod through the action of the inclined ejector rod. At this time, the first air hole and the second air hole are also opened with the demolding action. The solenoid valve controls the cold air to flow out from the first air hole and the second air hole respectively, thereby cooling the upper mold core, the lower mold core and the plastic part. The air-cooled cooling structure is adopted to reduce the cooling time required for the mold, and the plastic part is cooled evenly as a whole, thereby improving the production efficiency of the plastic part.

[0017] 2. After the upper die base and the lower die base are molded together, the slide assembly and the upper die core respectively block the first air hole and the second air hole to prevent the material from flowing into the first air hole and the second air hole;

[0018] The embodiments of the present invention are further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A top view of a first embodiment of the present invention;

[0020] Figure 2 For the present invention Figure 1 Sectional view of the A direction view;

[0021] Figure 3 For the present invention Figure 2 A partial enlarged view of point B in the middle;

[0022] Figure 4 It is a schematic structural diagram of the first embodiment of the present invention after removing the upper die base and the upper die core;

[0023] Figure 5 For the present invention Figure 4 A partial enlarged view of point C in the middle;

[0024] Figure 6 A three-dimensional diagram of the lower mold base structure of the first embodiment of the present invention;

[0025] Figure 7 A cross-sectional view of a lower die base structure according to a second embodiment of the present invention;

[0026] Figure 8 For the present invention Figure 7 A partial enlarged view of point D in the middle;

[0027] Among them: 1-upper die seat, 2-lower die seat, 3-upper die core, 4-lower die core, 5-slide seat assembly, 6-side draw rod, 7-bottom draw rod, 8-solenoid valve, 11-first air hole, 12-slide groove, 13-first air inlet, 14-adapter cavity, 15-rectangular groove, 21-second air hole, 22-adapter seat, 23-second air inlet, 24-inner cavity, 25-die frame, 26-positioning plate, 27-adapter plate, 28-bottom plate, 29-third countersunk hole, 41-second countersunk hole, 51-oblique top seat, 52-sliding seat, 53-shaft sleeve, 54-side slide block, 55-clamping groove, 56-oblique hole, 57-I-shaped part, 58-inner hole, 59-first countersunk hole, 60-molding cavity, 61-drafting surface, 71-air nozzle; DETAILED DESCRIPTION

[0028] like Figure 1 , 2As shown in Figures 4 and 5, the present invention provides a cooling structure applied to a mold, comprising an upper mold base 1, a lower mold base 2, an upper mold core 3, a lower mold core 4, a slide assembly 5, a side draw rod 6 and a bottom draw rod 7. The upper mold base 1 and the lower mold base 2 are respectively connected to the upper mold core 3 and the lower mold core 4. The upper mold core 3 is slidably connected to the slide assembly 5, and the slide assembly 5 is provided with a side draw rod 6 for core pulling. The lower mold core 4 is fixedly connected to the bottom draw rod 7 vertically distributed with the side draw rod 6, and also includes a control for controlling the on and off of the cooling gas. Solenoid valve 8, the solenoid valve 8 is fixedly connected to one side of the upper mold base 1 and / or the lower mold base 2, the upper mold core 3 is located above the moving path of the slide assembly 5 and is provided with a first air hole 11 for cooling the side draw rod 6, the lower mold base 2 is provided with a second air hole 21 for cooling the bottom draw rod 7, the first air hole 11 and the second air hole 21 are respectively connected to an external air source through the solenoid valve 8, when the upper mold base 1 and the lower mold base 2 are closed, the slide assembly 5 blocks the first air hole 11, and the upper mold base 1 / upper mold core 3 blocks the second air hole 21.

[0029] Combination Figure 3 As shown, in this embodiment, the upper mold base 1 is provided with a slide groove 12 and a first air inlet 13, the slide seat assembly 5 is provided with a side slider 54 adapted to the slide groove 12, the solenoid valve 8 is connected with the first air hole 11 through the first air inlet 13, and the opening of the first air hole 11 is vertically downward in the direction of the side draw rod 6, and the upper mold base 1 is provided with a transfer cavity 14 between the first air inlet 13 and the first air hole 11, the cross-sectional area of ​​the transfer cavity 14 is much larger than the first air inlet 13, the diameter of the first air inlet 13 is larger than the diameter of the first air hole 11, and the flow rate of the gas flowing out of the first air hole 11 is increased by changing the cross-sectional areas of the first air inlet 13 and the first air hole 11.

[0030] Combination Figure 5 As shown, in this embodiment, the slide assembly 5 includes an inclined top seat 51, a sliding seat 52 and a sleeve 53. The inclined top seat 51 is provided with a side slide block 54 and a clamping groove 55, and an inclined hole 56 for guiding the movement of the side pull-out rod 6. The sliding seat 52 is provided with an I-shaped portion 57 adapted to the clamping groove 55, and the sliding seat 52 is provided with an inner hole 58 passing through the I-shaped portion 57, the inner hole 58 is sleeved with the sleeve 53, the sleeve 53 is provided with a first countersunk hole 59 for installing the side pull-out rod 6, and the side pull-out rod 6 is clamped between the sleeve 53 and the inclined top seat 51, the sleeve 53 is provided with a molding cavity 60, the side pull-out rod 6 and the molding cavity 60 are combined to form a molding cavity of the side tube part of the plastic part, and the side pull-out rod 6 is provided with a draft surface 61, and the draft angle is 1°.

[0031] Combination Figure 6As shown, the present invention provides a first embodiment of the structure of the lower mold base 2, the lower mold base 2 is provided with a transfer seat 22 and a second air inlet 23, the transfer seat 22 is provided with an inner cavity 24 and a second air hole 21, the solenoid valve 8 is connected with the second air inlet 23 and the inner cavity 24 in sequence, the lower mold core 4 is provided with a second countersunk hole 41, the bottom pull rod 7 is vertically distributed on the lower mold base 2 through the second countersunk hole 41, the opening of the second air hole 21 is toward the direction of the bottom pull rod 7, the upper mold base 1 is provided with a rectangular groove 15 adapted to the transfer seat 22, and the structure is suitable for a structure in which the vertical hole of the injection molded part is a blind hole. When the mold is demolded, the cold air of the second air hole 21 blows toward and cools the plastic part. After demolding, the cold air of the second air hole 21 blows toward and cools the bottom pull rod 7. The diameter of the second air inlet 23 is greater than the diameter of the second air hole 21. By changing the cross-sectional area of ​​the second air inlet 23 and the second air hole 21, the flow rate of the gas flowing out of the second air hole 21 is increased.

[0032] Combination Figure 7 , 8 As shown, the present invention provides a second embodiment of the structure of the lower die base 2, the lower die base 2 includes a die frame 25, a positioning plate 26, an adapter plate 27 and a bottom plate 28 which are sequentially distributed from top to bottom, the lower die core 4 is fixedly connected to the die frame 25, the positioning plate 26 is provided with a third countersunk hole 29, the bottom draw rod 7 is clamped between the adapter plate 27 and the positioning plate 26 through the third countersunk hole 29, and the bottom draw rod 7 sequentially passes through the positioning plate 26 and the die frame 25 to extend into the lower die core 4, the adapter plate 27 is provided with a second air inlet 23, the bottom draw rod 7 is provided with a second air hole 21 which penetrates itself, and the solenoid valve 8 is connected to the second air hole 21 through the second air inlet 23. 1 is connected, and a nozzle portion 71 for abutting against the upper mold core 3 / upper mold frame 25 is provided on the top of the bottom draw rod 7. The diameter of the second air inlet 23 is larger than the diameter of the second air hole 21. When the mold is closed, the bottom draw rod 7 abuts against the upper mold core 3 / upper mold frame 25. This structure is suitable for the structure in which the vertical hole of the injection molded part is a through hole. When demolding, the cold air from the second air hole 21 blows to and cools the plastic part, and quickly cools the bottom draw rod 7 from the inside to the outside. The top of the nozzle portion 71 is a spherical surface 72. The guidance of the spherical surface 72 is conducive to the mold closing of the upper mold base 1 and the lower mold base 2, avoiding interference with the upper mold core 3 / upper mold frame 25 due to the installation error of the bottom draw rod 7.

[0033] The working principle of the present invention is that when the upper mold base 1 and the lower mold base 2 are molded together, the upper mold core 3 and the lower mold core 4 form a mold cavity for injection molding, at this time, the inclined ejector seat 51 controls the sliding seat 52 to move along the slide groove 12 through the transmission of the inclined ejector rod, and makes the side draw rod 6 abut against the bottom draw rod 7, and the side draw rod 6 and the bottom draw rod 7 form vertically distributed air holes in the plastic part, and the sliding seat 52, the upper mold core 3 / upper mold frame 25 respectively block the first air hole 11 and the second air hole 21 to prevent the material from flowing into the first air hole 11 and the second air hole 21; when the plastic After the part is cooled and initially shaped, the upper mold base 1 is separated from the lower mold base 2, and the slide assembly 5 uses the inclined ejector rod to make the side draw rod 6 move away from the bottom draw rod 7. At this time, the first air hole 11 and the second air hole 21 are opened, and the solenoid valve 8 controls the cold air to flow out from the first air hole 11 and the second air hole 21 respectively, so that while cooling the upper mold core 3, the lower mold core 4, the side draw rod 6, the bottom draw rod 7 and other components, the air flow blows to the surface of the cooled plastic part, so that the plastic part is cooled evenly as a whole, the cooling time required for the mold is reduced, and the production efficiency of the plastic part is improved.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cooling structure applied to a mold, comprising an upper mold base (1), a lower mold base (2), an upper mold core (3), a lower mold core (4), a slide assembly (5), a side draw rod (6) and a bottom draw rod (7), wherein the upper mold base (1) and the lower mold base (2) are respectively connected to the upper mold core (3) and the lower mold core (4), the upper mold core (3) is slidably connected to the slide assembly (5), and the slide assembly (5) is provided with a side draw rod (6) for core pulling, and the lower mold core (4) is fixedly connected to a bottom draw rod (7) vertically distributed with the side draw rod (6), characterized in that: The invention also includes a solenoid valve (8) for controlling the on and off of cooling gas. The solenoid valve (8) is fixedly connected to one side of the upper mold base (1) or / and the lower mold base (2). The upper mold core (3) is located above the moving path of the slide assembly (5) and is provided with a first air hole (11) for cooling the side draw rod (6). The lower mold base (2) is provided with a second air hole (21) for cooling the bottom draw rod (7). The first air hole (11) and the second air hole (21) are respectively connected to an external air source through the solenoid valve (8). When the upper mold base (1) and the lower mold base (2) are molded together, the slide assembly (5) blocks the first air hole (11) and the upper mold base (1) / upper mold core (3) blocks the second air hole (21).

2. The cooling structure applied to a mold according to claim 1, characterized in that: The upper mold base (1) is provided with a slide groove (12) and a first air inlet passage (13), the slide seat assembly (5) is provided with a side slider (54) adapted to the slide groove (12), the solenoid valve (8) is connected with the first air hole (11) through the first air inlet passage (13), and the opening of the first air hole (11) is vertically downward in the direction of the side draw rod (6), and the upper mold base (1) is provided with a transfer chamber (14) between the first air inlet passage (13) and the first air hole (11).

3. The cooling structure applied to a mold according to claim 2, characterized in that: The diameter of the first air inlet (13) is greater than the diameter of the first air hole (11).

4. The cooling structure applied to a mold according to claim 3, characterized in that: The slide seat assembly (5) comprises an inclined top seat (51), a sliding seat (52) and a shaft sleeve (53); the inclined top seat (51) is provided with a side slide block (54) and a clamping groove (55), and an inclined hole (56) for guiding the movement of the side pull rod (6); the sliding seat (52) is provided with an I-shaped portion (57) adapted to the clamping groove (55), and the sliding seat (52) is provided with an inner hole (58) penetrating the I-shaped portion (57); the inner hole (58) is sleeved with a shaft sleeve (53); the shaft sleeve (53) is provided with a first countersunk hole (59) for mounting the side pull rod (6), and the side pull rod (6) is clamped between the shaft sleeve (53) and the inclined top seat (51).

5. The cooling structure applied to a mold according to claim 4, characterized in that: The shaft sleeve (53) is provided with a fixed molding cavity (60), and the side draw rod (6) is combined with the fixed molding cavity (60) to form a molding cavity of the side tube part of the plastic part, and the side draw rod (6) is provided with a draft surface (61).

6. The cooling structure applied to a mold according to claim 1, characterized in that: The lower die base (2) is provided with an adapter seat (22) and a second air inlet (23); the adapter seat (22) is provided with an inner cavity (24) and a second air hole (21); the solenoid valve (8) is connected with the second air inlet (23) and the inner cavity (24) in sequence with the second air hole (21); the lower die core (4) is provided with a second countersunk hole (41); the bottom extraction rod (7) is vertically distributed on the lower die base (2) through the second countersunk hole (41); the opening of the second air hole (21) faces the direction of the bottom extraction rod (7); and the upper die base (1) is provided with a rectangular groove (15) adapted to the adapter seat (22).

7. The cooling structure applied to a mold according to claim 1, characterized in that: The lower mold base (2) comprises a mold frame (25), a positioning plate (26), an adapter plate (27) and a bottom plate (28) which are sequentially arranged from top to bottom. The lower mold core (4) is fixedly connected to the mold frame (25). The positioning plate (26) is provided with a third countersunk hole (29). The bottom pull-out rod (7) is clamped between the adapter plate (27) and the positioning plate (26) through the third countersunk hole (29). The bottom pull-out rod (7) sequentially passes through the positioning plate (26) and the mold frame (25) and extends into the lower mold core (4). The adapter plate (27) is provided with a second air inlet (23). The bottom pull-out rod (7) is provided with a second air hole (21) which penetrates the bottom pull-out rod (7). The solenoid valve (8) is connected to the second air hole (21) through the second air inlet (23).

8. The cooling structure applied to a mold according to claim 7, characterized in that: The top of the bottom draw rod (7) is provided with an air nozzle (71) for abutting against the upper mold core (3) / upper mold frame (25), and the upper part of the air nozzle (71) is a spherical surface (72).

9. A cooling structure applied to a mold according to any one of claims 6 to 8, characterized in that: The diameter of the second air inlet (23) is greater than the diameter of the second air hole (21).

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