A self-cooling casting mold for manufacturing a metal packaging can

Abstract

The present application relates to metal processing die technical field, specifically to a kind of self-cooling type casting mould for metal packaging can manufacturing;It contains upper die and lower die, upper die is made of upper die inner body and upper die outer body, lower die is made of lower die outer body and lower die inner body;Upper die and lower die, the inner body and outer body between each other are formed for the flow passage of cooling liquid flow, the face of the inner body and outer body of upper die and lower die is respectively provided with groove, two groups of groove are matched to form the flow passage for the flow of cooling liquid, upper die and lower die are respectively provided with liquid inlet and liquid outlet;In the present application, upper die and lower die are designed as the combined structure of inner body and outer body adhesion to form flow passage, so that cooling liquid is no longer limited to single external cooling, but directly internal heat exchange from mould heat source area, shorten heat transfer path, improve the cooling capacity to mould cavity, reduce the local thermal stress concentration caused by mould surface temperature difference too large in casting process.

Description

Technical Field

[0001] This invention relates to the field of metal processing mold technology, and specifically to a self-cooling casting mold for manufacturing metal packaging cans. Background Technology

[0002] Mold casting is a common method for forming metal packaging cans. However, due to the high temperature of the molten metal, the mold needs to be cooled in a timely manner during continuous casting until the product is shaped. Most existing casting molds use runners or direct external contact cooling. However, in these methods, heat is difficult to dissipate evenly. The contact area or the vicinity of the cooling runner will have a large temperature difference with other areas, which will affect the product. Furthermore, due to the size of the mold itself, only a few straight runners can be opened during the processing. The contact area between the coolant and the mold is small, which further increases the local temperature difference of the mold. Summary of the Invention

[0003] The purpose of this invention is to address the deficiencies and shortcomings of existing technologies by providing a reasonably designed self-cooling casting mold for manufacturing metal packaging cans, which can solve the aforementioned defects.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: it includes an upper mold and a lower mold, the upper mold being composed of an inner body and an outer body, and the lower mold being composed of an outer body and an inner body; a flow channel for coolant circulation is formed between the inner and outer bodies of both the upper and lower molds, and grooves are respectively opened on the surfaces where the inner and outer bodies of the upper and lower molds fit together, the two sets of grooves cooperating to form a flow channel for coolant circulation, and an inlet and an outlet are respectively provided on the upper and lower molds.

[0005] Preferably, the upper mold is a punch and the lower mold is a die.

[0006] Preferably, a connecting block is provided on the lower side of the upper mold outer body, and a connecting groove is opened in the inner body of the upper mold. The connecting block fits into the connecting groove. Multiple upper mold side flow channel grooves are opened on the outer side of the connecting block, and multiple upper mold side flow channel grooves are opened on the inner wall of the connecting groove. After the upper mold is installed, the upper mold side flow channel grooves one and two upper mold side flow channel grooves form the upper mold side flow channel. The number of upper mold side flow channels is even and they are evenly arranged around the circumference. A heat dissipation ring groove is opened in the upper mold outer body. Two isolation blocks are provided in the heat dissipation ring groove. The isolation blocks divide the heat dissipation ring groove into two symmetrical liquid inlet grooves and liquid outlet grooves. The upper mold outer body is provided with an upper mold liquid outlet and an upper mold liquid inlet, which are respectively connected to the liquid inlet groove and the liquid outlet groove. The number of upper mold side flow channels connected to the liquid inlet groove and the liquid outlet groove is the same. Several connecting flow channels are formed between the bottom surface of the connecting block and the bottom surface of the connecting groove. The bottom ends of the upper mold side flow channels connected to the liquid inlet groove and the liquid outlet groove are connected through the connecting flow channels.

[0007] Preferably, the upper mold side flow channel is spiral-shaped.

[0008] Preferably, the outer body of the upper mold is provided with an outer stepped groove II, and the inner body of the upper mold is provided with an inner stepped groove II that matches it; the outer stepped groove II is provided with an alignment groove III, and the inner stepped groove II is provided with an alignment groove IV that matches it.

[0009] Preferably, the lower mold outer body has a lower mold inlet and a lower mold outlet connected to its upper and lower ends respectively. The lower mold outer body and the lower mold inner body form an annular lower mold inlet channel, a lower mold confluence channel, and a lower mold outlet channel. The lower mold inlet is connected to the lower mold inlet channel. The lower mold inlet channel and the lower mold confluence channel are connected by several lower mold side heat dissipation channels. The lower mold confluence channel and the lower mold outlet channel are connected by several lower mold bottom channels. The lower mold outlet channel is connected to the lower mold outlet.

[0010] Preferably, a lower mold liquid inlet channel groove 1 is opened at the upper end of the lower mold outer body, and a lower mold liquid inlet channel groove 2 is opened on the lower mold inner body. The lower mold liquid inlet channel groove 1 and the lower mold liquid inlet channel groove 2 constitute the lower mold liquid inlet channel. A plurality of lower mold side channel grooves 2 are opened on the inner side of the lower mold outer body, and a plurality of lower mold side channel grooves 1 are opened on the lower mold inner body. The lower mold side channel grooves 1 and the lower mold side channel grooves 2 respectively constitute the lower mold side heat dissipation channel. A lower mold confluence channel groove 2 is opened at the lower end of the lower mold outer body, and a lower mold confluence channel groove 1 is opened on the lower mold inner body. The lower mold confluence channel groove 1 and the lower mold confluence channel groove 2 constitute an annular lower mold confluence channel.

[0011] Preferably, except for one lower mold side flow channel groove two that is far away from the lower mold inlet, the upper end of the other lower mold side flow channel groove two is provided with a fluid restrictor. The inner shape of the fluid restrictor matches the curvature of the inner wall of the lower mold body, and a vertically penetrating flow hole is opened in the fluid restrictor. Starting from the end close to the lower mold inlet, to the lower mold side flow channel groove two without a fluid restrictor, the flow holes on the fluid restrictor gradually decrease in size.

[0012] Preferably, the heat dissipation channel on the lower mold side is spiral-shaped, and the bottom channel of the lower mold is horizontal arc-shaped.

[0013] Preferably, the outer body of the lower mold has an inner stepped groove, and the inner body of the lower mold has an outer stepped groove that matches it; the inner stepped groove has an alignment groove, and the outer stepped groove has an alignment groove that matches the alignment groove.

[0014] The beneficial effects of the present invention after adopting the above structure are: 1. This application adopts an assembly design, which overcomes the defect that existing molds can only open simple holes as flow channels. The inner body and outer body are made separately, and the flow channel is opened by the contact surface between the two to form a flow channel with a larger heat dissipation volume.

[0015] 2. In this application, both the upper and lower molds are designed as a combined structure in which the inner and outer bodies fit together to form a flow channel, so that the coolant can directly exchange heat from the heat source area of ​​the mold, shorten the heat transfer path, improve the cooling capacity of the mold cavity, and thus reduce the local thermal stress concentration caused by the excessive temperature difference on the mold surface during the casting process.

[0016] 3. In this application, the side flow channels of the upper mold and the side heat dissipation flow channels of the lower mold are both arranged in a spiral shape to avoid the problem of insufficient heat exchange caused by the coolant having too short a path, increase the heat absorption time of the coolant, improve the overall cooling uniformity of the mold, and reduce defects in the product caused by local overheating and inconsistent cooling.

[0017] 4. In this application, the lower mold has a segmented structure consisting of a lower mold inlet channel, a lower mold side heat dissipation channel, a lower mold confluence channel, and a lower mold outlet channel, which allows the coolant to be collected at multiple locations to form a buffer zone, thereby ensuring uniform temperature and preventing heat from accumulating in the same area for a long time.

[0018] 5. In this application, a fluid limiter is provided at the upper end of the flow channel groove 2 on the lower mold side, and the diameter of the flow hole gradually changes along the liquid inlet direction, which can throttle the coolant, so that the flow rate near the liquid inlet area is not too large and the liquid supply far from the liquid inlet area is not insufficient, thereby improving the consistency of the heat dissipation flow channel at different positions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the structure of the upper mold outer body in this invention; Figure 4 This is a schematic diagram of the internal structure of the upper mold body in this invention; Figure 5 This is a cross-sectional view of the invention located at the heat dissipation ring groove; Figure 6 This is a schematic diagram of the structure of the lower mold inner body in this invention; Figure 7 This is a schematic diagram of the structure of the lower mold outer body in this invention; Figure 8 This is a cross-sectional view of the lower mold body in this invention; Figure 9 yes Figure 8 Enlarged view of section A; Figure 10 This is a top view of the lower mold body in this invention.

[0020] Explanation of reference numerals in the attached figures: 1. Mounting frame; 2. Lower mold outer body; 3. Lower mold liquid outlet; 4. Lower mold liquid inlet; 5. Lower mold inner body; 6. Lower mold side heat dissipation channel; 601. Lower mold side flow channel groove one; 602. Lower mold side flow channel groove two; 7. Lower mold liquid inlet channel; 701. Lower mold liquid inlet channel groove one; 702. Lower mold liquid inlet channel groove two; 8. Lower mold manifold; 801. Lower mold manifold channel groove one; 802. Lower mold manifold channel groove two; 9. Lower mold bottom flow channel; 10. Lower mold liquid outlet channel; 11. Inner stepped groove one; 12. Outer stepped groove one; 13. 14. Alignment groove 1; 15. Fluid limiting; 16. Flow hole; 17. Upper mold inner body; 18. Upper mold outer body; 19. Upper mold side flow channel; 1901. Upper mold side flow channel groove 1; 1902. Upper mold side flow channel groove 2; 20. Upper mold liquid outlet; 21. Upper mold liquid inlet; 22. Connecting block; 23. Connecting flow channel; 24. Heat dissipation ring groove; 2401. Liquid inlet groove; 2402. Liquid outlet groove; 25. Isolation block; 26. Connecting groove; 27. Outer stepped groove 2; 28. Inner stepped groove 2; 29. ​​Alignment groove 3; 30. Alignment groove 4. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] See Figures 1-2 As shown, it includes an upper mold and a lower mold. The upper mold is a punch, and the lower mold is a die. The upper mold is composed of an inner body 17 and an outer body 18, and the lower mold is composed of an outer body 2 and an inner body 5. The inner and outer bodies are connected by bolts. In both the upper and lower molds, a flow channel for coolant circulation is formed between the inner and outer bodies. Grooves are respectively opened on the surfaces where the inner and outer bodies of the upper and lower molds fit together. The two sets of grooves cooperate to form a flow channel for coolant circulation. The upper and lower molds are respectively provided with an inlet and an outlet.

[0023] See Figures 1-5As shown, a connecting block 22 is provided on the lower side of the upper mold outer body 18, and a connecting groove 26 is opened in the upper mold inner body 17. The connecting block 22 fits into the connecting groove 26. Multiple upper mold side flow channel grooves 1901 are opened on the outer side of the connecting block 22, and multiple upper mold side flow channel grooves 1902 are opened on the inner wall of the connecting groove 26. After the upper mold is installed, the upper mold side flow channel grooves 1901 and 1902 form the upper mold side flow channel 19. The upper mold side flow channel 19 is spiral-shaped to extend the flow path of the coolant inside the upper mold and improve the heat exchange uniformity of the circumferential area of ​​the upper mold. The number of upper mold side flow channels 19 is even and they are evenly arranged around the circumference. A heat dissipation ring groove 24 is opened in the upper mold outer body 18. Two isolation blocks 25 are provided in the heat dissipation ring groove 24. The isolation blocks 25 separate the heat dissipation ring groove. The upper mold is divided into two symmetrical inlet tanks 2401 and outlet tanks 2402. The upper mold body 18 is provided with an upper mold outlet 20 and an upper mold inlet 21, which are respectively connected to the inlet tank 2401 and the outlet tank 2402. The number of upper mold side flow channels 19 connected to the inlet tank 2401 and the outlet tank 2402 is the same. Several connecting flow channels 23 are formed between the bottom surface of the connecting block 22 and the bottom surface of the connecting groove 26. The bottom ends of the upper mold side flow channels 19 connected to the inlet tank 2401 and the outlet tank 2402 are connected by the connecting flow channels 23. The connection between the bottom ends of the corresponding side flow channels of the inlet tank 2401 and the outlet tank 2402 is realized through the connecting flow channels 23. By using multiple flow channels of the same shape, a complete channel for coolant to enter and exit can be formed. The outer body 18 of the upper mold is provided with an outer stepped groove 27, and the inner body 17 of the upper mold is provided with an inner stepped groove 28 that matches it; the outer stepped groove 27 is provided with an alignment groove 39, and the inner stepped groove 28 is provided with an alignment groove 40 that matches it.

[0024] See Figures 1-10 As shown, the lower mold outer body 2 is connected to the lower mold inlet 4 and the lower mold outlet 3 at its upper and lower ends respectively. The lower mold outer body 2 and the lower mold inner body 5 form an annular lower mold inlet channel 7, a lower mold confluence channel 8, and a lower mold outlet channel 10. The lower mold inlet 4 is connected to the lower mold inlet channel 7. The lower mold inlet channel 7 and the lower mold confluence channel 8 are connected by several lower mold side heat dissipation channels 6. The lower mold confluence channel 8 and the lower mold outlet channel 10 are connected by several lower mold bottom channels 9. The lower mold outlet channel 10 is connected to the lower mold outlet 3. The lower mold outer body 2 has a lower mold liquid inlet channel groove 701 at the upper end of its inner side, and the lower mold inner body 5 has a lower mold liquid inlet channel groove 702. The lower mold liquid inlet channel groove 701 and the lower mold liquid inlet channel groove 702 together form the lower mold liquid inlet channel 7. The lower mold outer body 2 has several lower mold side channel grooves 602 at its inner side, and the lower mold inner body 5 has several lower mold side channel grooves 601 at its inner side. The lower mold side channel grooves 601 and the lower mold side channel grooves 602 together form the lower mold side heat dissipation channel 6. The lower mold outer body 2 has a lower mold confluence channel groove 802 at the lower end of its inner side, and the lower mold inner body 5 has a lower mold confluence channel groove 801 at its inner side. The lower mold confluence channel grooves 801 and the lower mold confluence channel grooves 802 together form the annular lower mold confluence channel 8. Except for one lower mold side flow channel groove 602 far from the lower mold inlet 4, the upper ends of the other lower mold side flow channel grooves 602 are provided with fluid restrictors 15. The inner shape of the fluid restrictor 15 matches the curvature of the inner wall of the lower mold outer body 2. Vertical through-holes 16 are opened in the fluid restrictor 15. From the end close to the lower mold inlet 4 to the lower mold side flow channel groove 602 without fluid restrictors 15, the through-holes 16 on the fluid restrictor 15 gradually decrease in size to differentiate the flow distribution of the lower mold side heat dissipation channel 6 at different positions, thereby reducing the problem of insufficient liquid supply in areas far from the inlet. The specific diameter of the through-hole 16 is obtained by comprehensive calculation based on the actual operating environment temperature, coolant performance, flow channel diameter, pressure, etc., which will not be elaborated here. The heat dissipation channel 6 on the side of the lower mold is spiral-shaped, and the bottom channel 9 of the lower mold is horizontal arc-shaped, so that the coolant can first dissipate heat along the side wall of the lower mold, and then be discharged after being collected through the bottom arc-shaped channel; The lower mold outer body 2 has an inner stepped groove 11, and the lower mold inner body 5 has an outer stepped groove 12 that matches it. The inner stepped groove 11 has an alignment groove 13, and the outer stepped groove 12 has an alignment groove 14 that matches the alignment groove 13. The stepped groove ensures accurate installation position, while the alignment groove limits the angle to prevent angle deviation during installation. The same applies to the upper mold.

[0025] The installation, connection, or setting methods of the components not detailed above are all common mechanical methods, and the specific structure, model, and coefficient indicators of all their components are their own technologies. As long as they can achieve their beneficial effects, they can be implemented, so they will not be elaborated further.

[0026] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A self-cooling casting mold for manufacturing metal packaging cans, comprising an upper mold and a lower mold, characterized in that: The upper mold consists of an inner body (17) and an outer body (18), and the lower mold consists of an outer body (2) and an inner body (5). The upper mold and the lower mold each form a flow channel for coolant flow between their inner and outer bodies. The inner and outer bodies of the upper mold and the lower mold are respectively provided with grooves. The two sets of grooves cooperate to form a flow channel for coolant flow. The upper mold and the lower mold are respectively provided with an inlet and an outlet.

2. The self-cooling casting mold for manufacturing metal packaging cans according to claim 1, characterized in that: The upper mold is a punch, and the lower mold is a die.

3. The self-cooling casting mold for manufacturing metal packaging cans according to claim 2, characterized in that: The upper mold outer body (18) is provided with a connecting block (22) on its lower side. The upper mold inner body (17) has a connecting groove (26) inside. The connecting block (22) fits into the connecting groove (26). Multiple upper mold side flow channel grooves 1 (1901) are opened on the outer side of the connecting block (22). Multiple upper mold side flow channel grooves 2 (1902) are opened on the inner wall of the connecting groove (26). After the upper mold is installed, the upper mold side flow channel grooves 1 (1901) and 2 (1902) form the upper mold side flow channel (19). The number of upper mold side flow channels (19) is even and they are evenly arranged around the circumference. A heat dissipation ring groove (24) is provided in the upper mold outer body (18). Two isolation blocks (25) are provided in the heat dissipation ring groove (24). The separator (25) divides the heat dissipation ring groove (24) into two symmetrical liquid inlet grooves (2401) and liquid outlet grooves (2402). The upper mold body (18) is provided with an upper mold liquid outlet (20) and an upper mold liquid inlet (21), which are respectively connected to the liquid inlet groove (2401) and the liquid outlet groove (2402). The number of upper mold side flow channels (19) connected to the liquid inlet groove (2401) and the liquid outlet groove (2402) is the same. Several connecting flow channels (23) are formed between the bottom surface of the connecting block (22) and the bottom surface of the connecting groove (26). The bottom ends of the upper mold side flow channels (19) connected to the liquid inlet groove (2401) and the liquid outlet groove (2402) are connected through the connecting flow channels (23).

4. The self-cooling casting mold for manufacturing metal packaging cans according to claim 3, characterized in that: The upper mold side flow channel (19) is spiral-shaped.

5. The self-cooling casting mold for manufacturing metal packaging cans according to claim 3, characterized in that: The outer body (18) of the upper mold is provided with an outer stepped groove 2 (27), and the inner body (17) of the upper mold is provided with an inner stepped groove 2 (28) that matches it; the outer stepped groove 2 (27) is provided with an alignment groove 3 (29), and the inner stepped groove 2 (28) is provided with an alignment groove 4 (30) that matches it.

6. The self-cooling casting mold for manufacturing metal packaging cans according to claim 2, characterized in that: The lower mold outer body (2) is connected to the lower mold liquid inlet (4) and the lower mold liquid outlet (3) at the upper and lower ends of its side, respectively. The lower mold outer body (2) and the lower mold inner body (5) form an annular lower mold liquid inlet channel (7), a lower mold confluence channel (8) and a lower mold liquid outlet channel (10). The lower mold liquid inlet (4) is connected to the lower mold liquid inlet channel (7). The lower mold liquid inlet channel (7) and the lower mold confluence channel (8) are connected by several lower mold side heat dissipation channels (6). The lower mold confluence channel (8) and the lower mold liquid outlet channel (10) are connected by several lower mold bottom channels (9). The lower mold liquid outlet channel (10) is connected to the lower mold liquid outlet (3).

7. The self-cooling casting mold for manufacturing metal packaging cans according to claim 6, characterized in that: The lower mold outer body (2) has a lower mold liquid inlet channel groove 1 (701) at its upper end, and the lower mold inner body (5) has a lower mold liquid inlet channel groove 2 (702). The lower mold liquid inlet channel groove 1 (701) and the lower mold liquid inlet channel groove 2 (702) constitute the lower mold liquid inlet channel (7). The lower mold outer body (2) has several lower mold side channel grooves 2 (602) on its inner side, and the lower mold inner body (5) has several lower mold side channels. The first groove (601) and the second groove (602) on the lower mold side form a heat dissipation channel (6) on the lower mold side; the second groove (802) on the lower mold outer body (2) is opened at the lower end, and the first groove (801) on the lower mold inner body (5) is opened. The first groove (801) and the second groove (802) on the lower mold form an annular lower mold confluence channel (8).

8. The self-cooling casting mold for manufacturing metal packaging cans according to claim 7, characterized in that: Except for one lower mold side flow channel groove 2 (602) far away from the lower mold inlet (4), the upper end of the other lower mold side flow channel groove 2 (602) is provided with a fluid restrictor (15). The inner shape of the fluid restrictor (15) matches the inner wall curvature of the lower mold outer body (2). The fluid restrictor (15) has a vertically penetrating flow hole (16). Starting from the end close to the lower mold inlet (4) to the lower mold side flow channel groove 2 (602) without a fluid restrictor (15), the flow holes (16) on the fluid restrictor (15) gradually decrease in size.

9. A self-cooling casting mold for manufacturing metal packaging cans according to claim 6, characterized in that: The heat dissipation channel (6) on the lower mold side is spiral-shaped, and the bottom channel (9) of the lower mold is horizontal arc-shaped.

10. A self-cooling casting mold for manufacturing metal packaging cans according to claim 6, characterized in that: The lower mold outer body (2) is provided with an inner stepped groove (11), and the lower mold inner body (5) is provided with an outer stepped groove (12) that fits therewith; the inner stepped groove (11) is provided with a positioning groove (13), and the outer stepped groove (12) is provided with a positioning groove (14) that fits therewith.

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