A cooling structure applied to a mold

Abstract

The present invention relates to a cooling structure applied to a mold, which includes an upper mold base, a lower mold base, an upper mold core, a lower mold core, a slide base assembly, a side draw bar, a bottom draw bar and a solenoid valve. The upper mold core is provided with a first air hole for cooling the side draw bar above the moving path of the slide base assembly, and the lower mold base is provided with a second air hole for cooling the bottom draw bar. The first air hole and the second air hole are respectively externally connected to a gas source through the solenoid valve. When the upper mold base and the lower mold base are clamped, the slide base assembly blocks the first air hole, and the upper mold base / upper mold core blocks the second air hole. The purpose of the present invention is to adopt an air-cooled cooling structure, so that the plastic part is cooled evenly as a whole, reduce the cooling time required for the mold, and improve the production efficiency of the plastic part.

Description

Technical Field

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

[0002] An injection mold generally includes an upper mold base assembly and a lower mold base assembly. It fills the high-temperature molten material into each mold under high pressure, and then produces corresponding plastic parts according to the internal shape of the mold.

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

[0004] However, during the mold design process, it is often encountered that due to the limitations of the plastic part structure, the cooling water cannot reach the parts that need to be cooled in the plastic part. For example, in the parts that need to be formed by a core-pulling structure in the plastic part, due to the small cross-section of the core-pulling rod, there is no machining space for the effective circulation of the cooling water, which also makes this part unable to be cooled by water, resulting in deformation of the plastic part due to uneven cooling and reducing the quality of the plastic part. Summary of the Invention

[0005] In order to overcome the deficiencies of the background art, the technical solution adopted by the present invention is: a cooling structure applied to a mold, including an upper mold base, a lower mold base, an upper mold core, a lower mold core, a slide base assembly, a side core-pulling rod, and a bottom core-pulling rod. The upper mold base and the lower mold base are respectively connected with the upper mold core and the lower mold core. The upper mold core is slidably connected with the slide base assembly, and the slide base assembly is provided with a side core-pulling rod for core-pulling. The lower mold core is fixedly connected with a bottom core-pulling rod vertically distributed with the side core-pulling rod. It also includes a solenoid valve for controlling the on / off of the cooling gas. The solenoid valve is fixedly connected to one side of the upper mold base or / and the lower mold base. The upper mold core is provided with a first air hole for cooling the side core-pulling rod above the moving path of the slide base assembly. The lower mold base is provided with a second air hole for cooling the bottom core-pulling rod. The first air hole and the second air hole are respectively externally connected to a gas source through the solenoid valve. When the upper mold base and the lower mold base are closed, the slide base 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 such that the lower die base is provided with an adapter seat and a second air inlet passage. The adapter seat is provided with an inner cavity and a second air hole. The electromagnetic valve is communicated with the second air hole through the second air inlet passage and the inner cavity in sequence. The lower die core is provided with a second countersunk hole. The bottom ejector rod is vertically distributed on the lower die base through the second countersunk hole. The opening of the second air hole faces the direction of the bottom ejector rod. The upper die base is provided with a rectangular groove adapted to the adapter seat. This structure is applicable to the structure where 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 towards and cools the plastic part. After demolding, the cold air from the second air hole blows towards and cools the bottom ejector rod.

[0012] The present invention is further configured such that the lower die base includes a die carrier, a positioning plate, an adapter plate, and a bottom plate which are distributed in sequence from top to bottom. The lower die core is fixedly connected inside the die carrier. The positioning plate is provided with a third countersunk hole. The bottom ejector rod is clamped between the adapter plate and the positioning plate through the third countersunk hole, and the bottom ejector rod sequentially passes through the positioning plate and the die carrier and extends into the lower die core. The adapter plate is provided with a second air inlet passage. The bottom ejector rod is provided with a second air hole penetrating through itself. The electromagnetic valve is communicated with the second air hole through the second air inlet passage. When the mold is closed, the bottom ejector rod abuts against the upper die core / upper die carrier. This structure is applicable to the structure where the vertical hole of the injection molded part is a through hole. When demolding, the cold air from the second air hole blows towards and cools the plastic part, and quickly cools the bottom ejector rod from the inside to the outside.

[0013] The present invention is further configured such that the top of the bottom ejector rod is provided with a nozzle portion for abutting against the upper die core / upper die carrier. The upper part of the nozzle portion is spherical. The spherical surface guides the closing of the upper die base and the lower die base, avoiding interference with the upper die core / upper die carrier due to the installation error of the bottom ejector rod.

[0014] The present invention is further configured such that the diameter of the second air inlet passage is larger than the diameter of the second air hole. By changing the cross-sectional areas of the second air inlet passage and the second air hole, the flow rate of the gas flowing out of the second air hole is increased, enhancing the cooling effect of air cooling.

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

[0016] 1. When the plastic part is cooled and solidified and demolded, the slide seat assembly makes the side ejector rod move away from the bottom ejector rod through the action of the angled ejector rod. At this time, the first air hole and the second air hole are also opened along with the demolding action. The electromagnetic valve controls the cold air to flow out from the first air hole and the second air hole respectively, thereby cooling the upper die core, the lower die core, and the plastic part. The air-cooling structure is adopted, reducing the cooling time required for the mold and enabling the plastic part to be cooled evenly as a whole, improving the production efficiency of the plastic part.

[0017] 2. After the upper die base and the lower die base are closed, the slide seat assembly and the upper die core block the first air hole and the second air hole respectively, preventing the material from flowing into the first air hole and the second air hole.

[0018] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings. Description of the Drawings

[0019] Figure 1 Top view of the first embodiment of the present invention;

[0020] Figure 2 of the present invention Figure 1 Cross-sectional view of the view from direction A in

[0021] Figure 3 of the present invention Figure 2 Local enlarged view at position B in

[0022] Figure 4 Schematic structural view of the first embodiment of the present invention after removing the upper die holder and the upper die core;

[0023] Figure 5 of the present invention Figure 4 Local enlarged view at position C in

[0024] Figure 6 Stereogram of the lower die holder structure of the first embodiment of the present invention;

[0025] Figure 7 Cross-sectional view of the lower die holder structure of the second embodiment of the present invention;

[0026] Figure 8 of the present invention Figure 7 Local enlarged view at position D in

[0027] Wherein: 1 - upper die holder, 2 - lower die holder, 3 - upper die core, 4 - lower die core, 5 - slide seat assembly, 6 - side draw bar, 7 - bottom draw bar, 8 - solenoid valve, 11 - first air hole, 12 - chute, 13 - first air inlet channel, 14 - transfer cavity, 15 - rectangular groove, 21 - second air hole, 22 - transfer seat, 23 - second air inlet channel, 24 - inner cavity, 25 - die set, 26 - positioning plate, 27 - transfer plate, 28 - bottom plate, 29 - third counterbore, 41 - second counterbore, 51 - lifter seat, 52 - sliding seat, 53 - bushing, 54 - side slider, 55 - clamping groove, 56 - inclined hole, 57 - I-shaped part, 58 - inner hole, 59 - first counterbore, 60 - shaping cavity, 61 - draft surface, 71 - nozzle part; Detailed Embodiments

[0028] As 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 in the figure, the present invention provides a first embodiment of the structure of the lower die base 2. The lower die base 2 is provided with an adapter seat 22 and a second air inlet passage 23. The adapter seat 22 is provided with an inner cavity 24 and a second air hole 21. The solenoid valve 8 is communicated with the second air hole 21 through the second air inlet passage 23 and the inner cavity 24 in sequence. The lower die core 4 is provided with a second counterbore 41. The bottom ejector rod 7 is vertically distributed on the lower die base 2 through the second counterbore 41. The opening of the second air hole 21 faces the direction of the bottom ejector rod 7. The upper die base 1 is provided with a rectangular groove 15 adapted to the adapter seat 22. This structure is applicable to the structure where 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 21 blows towards and cools the plastic part. After demolding, the cold air from the second air hole 21 blows towards and cools the bottom ejector rod 7. The diameter of the second air inlet passage 23 is larger than that of the second air hole 21. By changing the cross-sectional areas of the second air inlet passage 23 and the second air hole 21, the flow rate of the gas flowing out of the second air hole 21 is increased.

[0032] Combined with Figure 7 , 8 As shown in the figure, the present invention provides a second embodiment of the structure of the lower die base 2. The lower die base 2 includes a die carrier 25, a positioning plate 26, an adapter plate 27, and a bottom plate 28 that are sequentially distributed from top to bottom. The lower die core 4 is fixedly connected inside the die carrier 25. The positioning plate 26 is provided with a third counterbore 29. The bottom ejector rod 7 is clamped between the adapter plate 27 and the positioning plate 26 through the third counterbore 29, and the bottom ejector rod 7 sequentially passes through the positioning plate 26 and the die carrier 25 and extends into the lower die core 4. The adapter plate 27 is provided with a second air inlet passage 23. The bottom ejector rod 7 is provided with a second air hole 21 penetrating through itself. The solenoid valve 8 is communicated with the second air hole 21 through the second air inlet passage 23. The top of the bottom ejector rod 7 is provided with a nozzle part 71 for abutting against the upper die core 3 / upper die carrier 25. The diameter of the second air inlet passage 23 is larger than that of the second air hole 21. When the mold is closed, the bottom ejector rod 7 abuts against the upper die core 3 / upper die carrier 25. This structure is applicable to the structure where the vertical hole of the injection molded part is a through hole. When demolding, the cold air from the second air hole 21 blows towards and cools the plastic part, and quickly cools the bottom ejector rod 7 from the inside to the outside. Above the nozzle part 71 is a spherical surface 72. Through the guidance of the spherical surface 72, it is beneficial for the upper die base 1 and the lower die base 2 to be closed, avoiding interference with the upper die core 3 / upper die carrier 25 due to the installation error of the bottom ejector rod 7.

[0033] The working principle of the present invention is that after the upper die base 1 and the lower die base 2 are closed, the upper die core 3 and the lower die core 4 form a cavity for injection molding. At this time, the angled ejector base 51 controls the sliding seat 52 to move along the chute 12 through the transmission of the angled ejector rod, and makes the side ejector rod 6 abut against the bottom ejector rod 7. Air holes vertically distributed inside the plastic part are formed by the side ejector rod 6 and the bottom ejector rod 7. Moreover, the sliding seat 52, the upper die core 3 / the upper die holder 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 part is initially shaped after cooling, the upper die base 1 and the lower die base 2 are separated. The slide seat assembly 5 makes the side ejector rod 6 move away from the bottom ejector rod 7 through the action of the angled ejector rod. At this time, the first air hole 11 and the second air hole 21 are opened accordingly. The solenoid valve 8 controls the cold air to flow out from the first air hole 11 and the second air hole 21 respectively. Thus, while cooling components such as the upper die core 3, the lower die core 4, the side ejector rod 6, and the bottom ejector rod 7, the air flow blows towards the surface of the cooling plastic part, enabling the plastic part to be cooled evenly as a whole, reducing the cooling time required for the mold, and improving the production efficiency of the plastic part.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within 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 block assembly (5), a side core-pulling rod (6) and a bottom core-pulling rod (7). The upper mold base (1) and the lower mold base (2) are respectively connected with the upper mold core (3) and the lower mold core (4). The upper mold core (3) is slidably connected with the slide block assembly (5), and the slide block assembly (5) is provided with a side core-pulling rod (6) for core-pulling. The lower mold core (4) is fixedly connected with a bottom core-pulling rod (7) vertically distributed with the side core-pulling rod (6), and it is characterized in that, It further includes a solenoid valve (8) for controlling the on / off of the cooling gas. The solenoid valve (8) is fixedly connected to one side of the upper die base (1) or / and the lower die base (2). Above the moving path of the slide block assembly (5), the upper die core (3) is provided with a first air hole (11) for cooling the side ejector rod (6), and the lower die base (2) is provided with a second air hole (21) for cooling the bottom ejector 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 die base (1) and the lower die base (2) are clamped, the slide block assembly (5) blocks the first air hole (11), and the upper die base (1) / upper die core (3) blocks the second air hole (21). The slide block assembly (5) includes an inclined ejector base (51), a sliding block (52) and a bushing (53). The inclined ejector base (51) is provided with a side slider (54) and a clamping groove (55), and an inclined hole (56) for guiding the movement of the side ejector rod (6). The sliding block (52) is provided with an I-shaped part (57) adapted to the clamping groove (55), and the sliding block (52) is provided with an inner hole (58) passing through the I-shaped part (57). The inner hole (58) is sleeved with a bushing (53). The bushing (53) is provided with a first counterbore (59) for installing the side ejector rod (6), and the side ejector rod (6) is clamped between the bushing (53) and the inclined ejector base (51).

2. The cooling structure applied to a mold according to claim 1, characterized in that: The upper die base (1) is provided with a chute (12) and a first air inlet passage (13). The slide block assembly (5) is provided with a side slider (54) adapted to the chute (12). The solenoid valve (8) is communicated with the first air hole (11) through the first air inlet passage (13). The opening of the first air hole (11) is vertically downward towards the direction of the side ejector rod (6). Between the first air inlet passage (13) and the first air hole (11), the upper die base (1) is provided with a transfer cavity (14).

3. The cooling structure applied to a mold according to claim 2, characterized in that: The diameter of the first air inlet passage (13) is larger 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 bushing (53) is provided with a shaping cavity (60). The side ejector rod (6) and the shaping cavity (60) form a cavity of the side tube part of the plastic part. The side ejector rod (6) is provided with a draft surface (61).

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

6. The cooling structure applied to a mold according to claim 1, characterized in that: The lower die base (2) includes a die holder (25), a positioning plate (26), an adapter plate (27) and a bottom plate (28) which are distributed in sequence from top to bottom. The lower die core (4) is fixedly connected within the die holder (25). The positioning plate (26) is provided with a third countersunk hole (29). The bottom ejector rod (7) is clamped between the adapter plate (27) and the positioning plate (26) through the third countersunk hole (29), and the bottom ejector rod (7) sequentially passes through the positioning plate (26) and the die holder (25) and extends into the lower die core (4). The adapter plate (27) is provided with a second air inlet passage (23), and the bottom ejector rod (7) is provided with a second air hole (21) penetrating through itself. The electromagnetic valve (8) is communicated with the second air hole (21) through the second air inlet passage (23).

7. The cooling structure applied to a mold according to claim 6, wherein: The top of the bottom ejector rod (7) is provided with a nozzle part (71) for abutting against the upper die core (3) / upper die holder (25), and above the nozzle part (71) is a spherical surface (72).

8. A cooling structure applied to a mold according to any one of claims 5-7, characterized in that: The diameter of the second air inlet passage (23) is larger than the diameter of the second air hole (21).

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