A die-casting mold structure with increased ejection force

Abstract

The utility model relates to a die-casting mold structure for increasing ejection force, including an upper mold frame and a lower mold frame, an upper mold core and a lower mold core stacked up and down are installed between the upper mold frame and the lower mold frame, a bottom plate with upper and lower limit movable is installed at the lower ends of the upper and lower mold frames, outward extension plates are arranged on both sides of the lower mold frame, two auxiliary oil cylinders are installed in parallel at the upper end of each extension plate, the auxiliary oil cylinders are arranged vertically, the piston rods of the auxiliary oil cylinders pass through the extension plates and are connected to the bottom plate, a large core is installed on the bottom plate, four core pulling blocks are installed around the upper end of the lower mold frame, the four core pulling blocks surround the large core, a locking groove is provided at the bottom of each core pulling block, a locking block matching the locking groove is fixedly installed on the bottom plate below each core pulling block, and an inclined guide column is installed at the upper end of the locking block. Due to the simultaneous action of the four auxiliary oil cylinders and the ejection cylinder of the die-casting machine, the utility model can effectively solve the problem of insufficient ejection force of the original equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of die casting moulds, in particular to a die casting mould structure with increased ejection force. Background Art

[0002] like Figure 6 As shown, like this gearbox housing 18, the whole is cylindrical, and a cylindrical inner cavity 19 is provided in the center of the gearbox housing 18. Conventional molds are connected to the lower mold by the die-casting machine after the mold is opened, and the ejector rod is driven to eject the casting. However, because the inner cavity 19 in the center of the gearbox housing 18 has no demoulding slope, the clamping force is large, and the entire lower mold needs to be driven to move together during ejection, the required ejection force often exceeds the maximum ejection force of the equipment, and the casting cannot be ejected. It is necessary to replace a larger model of equipment to increase the ejection force to complete the production, resulting in a situation where a big horse pulls a small cart, resulting in a waste of resources. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a die-casting mold structure with increased ejection force. Due to the simultaneous action of four auxiliary oil cylinders and the ejection oil cylinder of the die-casting machine, the problem of insufficient ejection force of the original equipment can be effectively solved.

[0004] The utility model solves the technical problem by adopting the following technical solution: providing a die-casting mold structure with increased ejection force, including an upper mold frame and a lower mold frame, an upper mold core and a lower mold core stacked up and down are installed between the upper mold frame and the lower mold frame, a mold cavity is provided between the upper mold core and the lower mold core, a bottom plate with upper and lower limit movable is installed at the lower end of the lower mold frame, outward extension plates are arranged on both sides of the lower mold frame, and two auxiliary oil cylinders are installed in parallel at the upper end of each extension plate, the auxiliary oil cylinders are arranged vertically, and the auxiliary oil cylinders are arranged vertically. The piston rod of the oil cylinder is connected to the bottom plate through the extension plate, and a large core vertically penetrating the lower mold frame and the lower mold core is installed on the bottom plate. Four core pulling blocks are installed around the upper end of the lower mold frame and the lower mold core respectively. The four core pulling blocks surround the large core, and a locking groove is provided at the bottom of each core pulling block. A locking block matching the locking groove is fixedly installed on the bottom plate below each core pulling block, and an inclined guide column is installed on the upper end of the locking block. The upper end of the inclined guide column obliquely passes through the corresponding core pulling block and is inserted into the upper mold frame.

[0005] As a supplement to the technical solution described in the utility model, a limit plate is fixedly installed on each side of the base plate, and a straight through hole is vertically opened on the upper part of the limit plate. A limit bolt is inserted into the straight through hole, and one end of the limit bolt is fixedly connected to the side wall of the lower mold frame.

[0006] As a supplement to the technical solution of the utility model, a cooling channel is arranged inside the large core.

[0007] As a supplement to the technical solution described in the utility model, a barrel is installed on the upper part of the upper mold frame, and the lower port of the barrel is connected to the mold cavity.

[0008] As a supplement to the technical solution described in the utility model, the inner side wall of the upper part of the locking block is an inclined surface, and the cross-sectional shape of the locking groove is a right-angled trapezoid, and the shape of the locking groove matches the locking block.

[0009] Beneficial effects: The utility model relates to a die-casting mold structure for increasing ejection force, extending the two sides of the lower mold frame to form two extension plates, the two extension plates respectively fix four auxiliary oil cylinders, the piston rods of the auxiliary oil cylinders are connected to the bottom plate, when ejecting the casting, the ejection oil cylinder of the die-casting machine pulls the bottom plate, and at the same time, the four auxiliary oil cylinders on both sides of the lower mold frame also act to separate the bottom plate from the lower mold frame. Due to the simultaneous action of the four auxiliary oil cylinders and the ejection oil cylinder of the die-casting machine, the problem of insufficient ejection force of the original equipment can be effectively solved, and the large core will move with the bottom plate, so that the large core is separated from the inner cavity of the gearbox housing after molding. The utility model also has the advantages of simple structure, convenient use, and low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 It is a cross-sectional view of the utility model;

[0012] Figure 3 It is a structural schematic diagram of the lower mold frame and the bottom plate of the utility model;

[0013] Figure 4 It is a structural schematic diagram of the bottom plate, the locking block and the four auxiliary oil cylinders described in the utility model;

[0014] Figure 5 It is a structural schematic diagram of the core-pulling block described in the utility model;

[0015] Figure 6 It is a structural schematic diagram of the processed product of the utility model.

[0016] Illustration: 1. Upper mold frame, 2. Lower mold frame, 3. Bottom plate, 4. Extension plate, 5. Auxiliary oil cylinder, 6. Barrel, 7. Limit plate, 8. Slotted through hole, 9. Limit bolt, 10. Upper mold core, 11. Lower mold core, 12. Large core, 13. Core pulling block, 14. Locking block, 15. Oblique guide column, 16. Locking groove, 17. Inclined surface, 18. Gearbox housing, 19. Inner cavity. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0018] The embodiment of the utility model relates to a die-casting mold structure with increased ejection force, such as Figure 1-5 As shown, it includes an upper mold frame 1 and a lower mold frame 2, an upper mold core 10 and a lower mold core 11 stacked up and down are installed between the upper mold frame 1 and the lower mold frame 2, a mold cavity is provided between the upper mold core 10 and the lower mold core 11, and a bottom plate 3 with upper and lower limit movable is installed at the lower end of the lower mold frame 2. Both sides of the lower mold frame 2 are provided with outward extension plates 4, and two auxiliary oil cylinders 5 are installed in parallel at the upper end of each extension plate 4. The auxiliary oil cylinders 5 are arranged vertically, and the piston rods of the auxiliary oil cylinders 5 pass through the extension plates 4 and are connected to the bottom plate 3. A large core 12 is provided which vertically passes through the lower mold frame 2 and the lower mold core 11. Four core pulling blocks 13 are respectively installed around the upper end of the lower mold frame 2 and the lower mold core 11. The four core pulling blocks 13 surround the large core 12. A locking groove 16 is provided at the bottom of each core pulling block 13. A locking block 14 which cooperates with the locking groove 16 is fixedly installed on the bottom plate 3 below each core pulling block 13. An inclined guide column 15 is installed on the upper end of the locking block 14. The upper end of the inclined guide column 15 obliquely passes through the corresponding core pulling block 13 and is inserted into the upper mold frame 1.

[0019] The large core 12 is provided with a cooling channel inside, and the spot cooling machine controls the instantaneous water cooling before ejection, which rapidly reduces the temperature of the large core, causes the large core to shrink quickly, and reduces the clamping force. The large core 12 is fixedly connected to the bottom plate 3 by bolts.

[0020] The utility model extends the two sides of the lower mold frame 2 to form two extension plates 4, and the two extension plates 4 are respectively fixed with four auxiliary oil cylinders 5, and the piston rods of the auxiliary oil cylinders 5 are connected to the bottom plate 3; the oil circuit of the auxiliary oil cylinder 5 is connected in parallel with the ejection oil circuit of the die-casting machine; when ejecting the casting, the ejection oil cylinder of the die-casting machine pulls the bottom plate 3, and at the same time, the four auxiliary oil cylinders 5 on both sides of the lower mold frame 2 also act to separate the bottom plate 3 from the lower mold frame 2. Due to the simultaneous action of the four auxiliary oil cylinders 5 and the ejection oil cylinder of the die-casting machine, the problem of insufficient ejection force of the original equipment can be effectively solved. It will move with the bottom plate 3, so that the large core 12 is separated from the inner cavity 19 of the gearbox housing after molding; separate the bottom plate 3 and the lower mold frame 2, the locking block 14 disengages from the locking groove 16, and the core pulling block 13 is driven to be pulled out through the inclined guide column 15, and ejected a certain distance, the core pulling block 13 is completely pulled out, and the four core pulling blocks 13 are separated from the outer wall of the gearbox housing 18, and the casting is also completely detached and taken out; a cooling channel is designed inside the large core 12, and water cooling is passed before ejection, which sharply reduces the temperature of the large core 12, causes the large core 12 to shrink quickly, and reduces the clamping force.

[0021] The lower end of the inclined guide column 15 is inserted into the locking block 14 and fixedly connected with a long bolt.

[0022] A limit plate 7 is fixedly installed on each side of the bottom plate 3, and a through hole 8 is vertically provided on the upper part of the limit plate 7. A limit bolt 9 is inserted into the through hole 8, and one end of the limit bolt 9 is fixedly connected to the side wall of the lower mold frame 2; the limit bolt 9 cooperates with the through hole 8 of the limit plate 7 to realize the limiting movement between the lower mold frame 2 and the bottom plate 3. The lower part of the limit plate 7 is fixed to the side wall of the bottom plate 3 by ordinary bolts.

[0023] A barrel 6 is installed on the upper mold frame 1, and the lower end of the barrel 6 is connected to the mold cavity; the metal solution enters through the barrel 6, and then flows to the mold cavity through the pouring channel to fill the inside of the mold cavity.

[0024] The outer surface of the large core 12 is provided with a smooth coating, which can reduce the friction coefficient and reduce the friction force.

[0025] The inner side wall of the upper portion of the locking block 14 is an inclined surface 17 , and the cross-sectional shape of the locking groove 16 is a right-angled trapezoid, and the shape of the locking groove 16 matches that of the locking block 14 .

[0026] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0027] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0028] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0029] The above is a detailed introduction to a die-casting mold structure for increasing ejection force provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technicians in this field, according to the ideas of the present application, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A die-casting mold structure for increasing ejection force, comprising an upper mold frame (1) and a lower mold frame (2), wherein an upper mold core (10) and a lower mold core (11) stacked up and down are installed between the upper mold frame (1) and the lower mold frame (2), and a mold cavity is provided between the upper mold core (10) and the lower mold core (11), characterized in that: The lower end of the lower mold frame (2) is provided with a bottom plate (3) with upper and lower limit movements. Outward extension plates (4) are provided on both sides of the lower mold frame (2). Two auxiliary oil cylinders (5) are installed in parallel on the upper end of each extension plate (4). The auxiliary oil cylinders (5) are arranged vertically. The piston rods of the auxiliary oil cylinders (5) pass through the extension plates (4) and are connected to the bottom plate (3). A large core (12) vertically penetrating the lower mold frame (2) and the lower mold core (11) is installed on the bottom plate (3). The upper end of the lower mold frame (2) is located at Four core pulling blocks (13) are respectively installed around the lower mold core (11), and the four core pulling blocks (13) surround the large core (12). A locking groove (16) is provided at the bottom of each core pulling block (13). A locking block (14) matching the locking groove (16) is fixedly installed below each core pulling block (13) on the bottom plate (3), and an inclined guide column (15) is installed at the upper end of the locking block (14). The upper end of the inclined guide column (15) obliquely passes through the corresponding core pulling block (13) and is inserted into the upper mold frame (1).

2. A die-casting mold structure for increasing ejection force according to claim 1, characterized in that: A limit plate (7) is fixedly installed on each side of the bottom plate (3), and a straight through hole (8) is vertically opened on the upper part of the limit plate (7). A limit bolt (9) is inserted into the straight through hole (8), and one end of the limit bolt (9) is fixedly connected to the side wall of the lower mold frame (2).

3. The die-casting mold structure for increasing ejection force according to claim 1, characterized in that: A cooling channel is arranged inside the large core (12).

4. The die-casting mold structure for increasing ejection force according to claim 1, characterized in that: A barrel (6) is installed on the upper part of the upper mold frame (1), and the lower port of the barrel (6) is connected to the mold cavity.

5. The die-casting mold structure for increasing ejection force according to claim 1, characterized in that: The inner side wall of the upper part of the locking block (14) is an inclined surface (17), and the cross-sectional shape of the locking groove (16) is a right-angled trapezoid. The shape of the locking groove (16) matches that of the locking block (14).

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