Die-casting die for wheelchair support

Abstract

The die-casting die for the wheelchair support comprises an upper die base and a lower die base which are oppositely arranged up and down, an upper die core and a lower die core which are installed in a stacked mode are installed between the upper die base and the lower die base, and a forming die cavity is formed between the upper die core and the lower die core. A first core pulling structure is installed on the right portion between the upper die base and the lower die base, a sprue structure is installed in the upper die base in an embedded mode, and a second core pulling structure is arranged at the bottom of the lower die base. An inner groove is formed in the position, under the sprue structure, of the lower mold core, a sprue spreader is connected to the middle of the inner groove in an inserted mode, a spherical cambered surface is arranged at the top of the sprue spreader, a plurality of demolding ejector pins are arranged in the sprue spreader and the lower mold core in a penetrating mode, and a plurality of shunting grooves extending to the forming mold cavity are formed in the periphery of the inner groove. The wheelchair support die-casting die can solve the problem that the quality of a wheelchair support is affected due to the defects of uneven flowing of molten metal, air holes, shrinkage cavities and the like existing in an existing wheelchair support die-casting die.

Description

TECHNICAL FIELD

[0001] The utility model relates to die casting die technical field, concretely is a kind of die casting die for wheelchair support. BACKGROUND

[0002] Wheelchair support is the important component of wheelchair, and its strength and stability are crucial to the performance of wheelchair.The traditional die casting die in the manufacture of wheelchair support, gate position and the periphery distance of wheelchair support is too long, resulting in long metal liquid flow path, metal liquid is not uniform when filling mold cavity, prone to porosity, shrinkage cavity and other defects, affect the quality of wheelchair support.Therefore, a new type of die casting die is developed. SUMMARY

[0003] The utility model provides a kind of die casting die for wheelchair support, can solve the problem that the quality of wheelchair support is affected by the defects such as porosity, shrinkage cavity and the like of existing wheelchair support die casting die.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of die casting die for wheelchair support, including the upper die holder and lower die holder being arranged oppositely, the upper die holder and lower die holder between being installed with the upper die core and lower die core being stacked installation, the upper die core and lower die core between forming forming mold cavity, the right part between the upper die holder and lower die holder is installed with first core-pulling structure, the upper die holder is embedded with gate structure, the bottom of lower die holder is provided with second core-pulling structure;The lower die core is provided with inner groove directly below the gate structure, the inner groove is inserted with shunt cone in middle part, the top of shunt cone is provided with spherical cam, to optimize the flow path of metal liquid, the shunt cone and lower die core are all provided with a plurality of demolding thimbles for facilitating demolding, the outer periphery of inner groove is provided with a plurality of shunt grooves extending to forming mold cavity, the shunt grooves are distributed radially, for guiding metal liquid from inner groove to each part of forming mold cavity, ensure that metal liquid fills cavity quickly and uniformly, reduce porosity and cold shut defects;The first core-pulling structure includes sliding seat and core-pulling slider arranged in sliding seat, one end of core-pulling slider is provided with forming insert block inserted into forming mold cavity, the front of forming insert block is provided with forming shaft, the rear end of core-pulling slider is provided with first drive oil cylinder for controlling the sliding of core-pulling slider.

[0005] As preferred, the lower die core is provided with a plurality of hole position forming pins inserted into forming mold cavity, to form hole position on support.

[0006] As preferred, the lower end surface of lower die holder is provided with die foot on both sides, die foot is provided with ejector plate between, ejector plate is vertically provided with a plurality of demolding thimbles, and lower die plate is fixedly arranged at the lower end of die foot.

[0007] As preferred, the second core-pulling structure comprises a second driving oil cylinder fixedly installed on the lower die plate, and a mounting plate is arranged at the movable end of the second driving oil cylinder, and a plurality of shaped core-pulling rods are arranged side by side on the mounting plate and inserted into the forming cavity, and the shaped core-pulling rods are used for forming the inner holes of the wheelchair support.

[0008] As preferred, a guide sleeve is arranged on the lower die core and in sliding fit with the shaped core-pulling rods, so as to guide the accurate movement of the shaped core-pulling rods.

[0009] As preferred, two forming inserts are arranged in the upper die core and used for forming specific structures on the support.

[0010] As preferred, a locking protrusion is detachably arranged on one side of the upper die core, and a locking groove corresponding to the locking protrusion is arranged on the lower die core, and the locking protrusion and the locking groove are matched to realize the accurate alignment and locking of the upper die core and the lower die core.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] The simple structure and the spherical head help the metal liquid to flow uniformly around the flow cone into the flow groove, improve the filling effect of the mold cavity, ensure the casting quality, improve the flow path of the metal liquid, and avoid defects such as pores and cold shuts. The existing wheelchair support die casting mold can solve the problems of uneven metal liquid flow, pores, shrinkage holes and other defects, and affect the quality of the wheelchair support. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a front view of the sectional structure of the utility model;

[0014] Figure 2 It is a perspective view of the utility model;

[0015] Figure 3 It is a structure schematic view of the lower die of the utility model;

[0016] Figure 4 It is a structure schematic view of the upper die of the utility model;

[0017] Figure 5 It is a perspective view of the lower die core of the utility model;

[0018] Figure 6 It is a structure schematic view of the first core-pulling structure of the utility model;

[0019] Figure 7 It is a sectional structure schematic view of the second core-pulling structure of the utility model;

[0020] Figure 8 The sectional structure schematic view of the forming bolt of the utility model.

[0021] Reference signs:

[0022] 1, upper die seat, 2, lower die seat, 3, upper die core, 4, lower die core, 5, forming cavity, 6, first core-pulling structure, 61, sliding seat, 62, core-pulling slider, 63, forming insert, 64, forming shaft, 65, first driving oil cylinder, 7, gate structure, 8, second core-pulling structure, 81, second driving oil cylinder, 82, mounting plate, 83, forming core-pulling rod, 84, guide sleeve, 9, hole site forming bolt, 10, inner groove, 11, flow dividing cone, 12, spherical arc surface, 13, ejection pin, 14, flow dividing groove, 15, forming insert, 16, locking protrusion, 17, locking groove, 18, die foot, 19, pin plate, 20, lower die plate. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0024] As Figures 1-8The utility model discloses to solve the uneven metal liquid flow, blowhole, shrinkage cavity and other defects of the existing wheelchair support die casting mould, affect the quality of wheelchair support problem, provide following technical scheme: a kind of die casting mould for wheelchair support, including upper die holder 1 and lower die holder 2 being arranged oppositely, the upper die holder 1 and lower die holder 2 between installation are stacked and installed upper die core 3 and lower die core 4, the upper die core 3 and lower die core 4 between form forming die cavity 5, the cavity formed by upper die core 3 and lower die core 4 are used to form wheelchair support, the right part between the upper die holder 1 and lower die holder 2 is equipped with first core-pulling structure 6, the upper die holder 1 is embedded and is equipped with gate structure 7, the bottom of lower die holder 2 is provided with second core-pulling structure 8;The lower die core 4 is located just below the gate structure 7 and is provided with inner groove 10, the middle part of inner groove 10 is inserted with shunt cone 11, the top of shunt cone 11 is provided with spherical arc face 12, to optimize the flow path of metal liquid, the shunt cone 11 and lower die core 4 are all provided with a plurality of demolding thimbles 13 for facilitating demolding, the outer periphery of inner groove 10 is provided with a plurality of shunt grooves 14 extending to forming die cavity 5, the shunt grooves 14 are radially distributed, for guiding metal liquid from inner groove 10 to each part of forming die cavity 5, ensuring that metal liquid fills the cavity quickly and evenly, reducing blowhole and cold shut defects;The first core-pulling structure 6 includes sliding seat 61 and core-pulling slider 62 arranged in sliding seat 61, one end of core-pulling slider 62 is provided with forming insert 63 inserted into forming die cavity 5, the front part of forming insert 63 is provided with forming shaft 64, the rear end of core-pulling slider 62 is provided with first drive oil cylinder 65 for controlling the sliding of core-pulling slider 62, the cooperation of first core-pulling structure 6 and second core-pulling structure 8 can quickly complete the forming and core-pulling action of complex structure, improve production efficiency.

[0025] Specifically, the lower die core 4 is arranged with a plurality of hole position forming pins 9 inserted into the forming die cavity 5 to form the hole positions on the support.

[0026] In the embodiment, as shown in Figure 1 and Figure 2 The lower end surface of the lower die holder 2 is provided with a mold foot 18 on both sides, a thimble plate 19 is arranged between the two mold feet 18, a plurality of demolding thimbles 13 are vertically arranged on the thimble plate 19, and a lower die plate 20 is fixedly arranged at the lower end of the two mold feet 18.

[0027] In the embodiment, as shown in Figure 1As shown, the second core-pulling structure 8 comprises a second driving oil cylinder 81 fixedly installed on the lower die plate 20, and the movable end of the second driving oil cylinder 81 is provided with a mounting plate 82, and the mounting plate 82 is provided with a plurality of shaped core-pulling rods 83 inserted into the forming cavity 5 in parallel, and the shaped core-pulling rods 83 are used for forming the inner holes of the wheelchair support.

[0028] In the embodiment, as shown in the drawings, Figure 7 As shown, the lower die core 4 is provided with a guide sleeve 84 in sliding fit with the shaped core-pulling rod 83, and the guide sleeve 84 guides the accurate movement of the shaped core-pulling rod 83.

[0029] In the embodiment, as shown in the drawings, Figure 1 As shown, two shaped inserts 15 are installed in the upper die core 3, and the shaped inserts 15 are used for forming specific structures on the support.

[0030] In the embodiment, as shown in the drawings, Figure 3 and Figure 4 As shown, one side of the upper die core 3 is detachably provided with a locking protrusion 16, and the lower die core 4 is provided with a locking groove 17 corresponding to the locking protrusion 16, and the locking protrusion 16 and the locking groove 17 are matched to realize the accurate alignment and locking of the upper die core 3 and the lower die core 4.

[0031] In the embodiment, as shown in the drawings, Figure 1 As shown, first, the whole mold is installed on the die casting machine, the metal solution enters into the mold from the gate structure 7, and then is distributed to the distribution groove 14 through the distribution cone 11 and the inner groove 10, and then the metal solution fills the mold cavity, and then the mold is opened, the upper die seat 1 and the upper die core 2 are moved upward, the shaped insert 63 and the shaped shaft 64 of the first core-pulling structure 6 are pulled out by the core-pulling slider 62 driven by the first driving oil cylinder 65 after the wheelchair support is formed, the shaped core-pulling rod 83 of the second core-pulling structure 8 is pulled out by the second driving oil cylinder 81 after the wheelchair support is formed, and then the ejector pin plate 19 controls the ejector pin 13 to eject the formed wheelchair support from the lower die core 4, and the demolding is completed.

[0032] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used for explaining the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0033] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description and cannot be understood as indicating or implying the relative importance of the technical features or implying the number of the technical features indicated. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0034] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the present application.

Claims

1. A die-casting mold for a wheelchair support, comprising an upper mold base (1) and a lower mold base (2) arranged vertically opposite each other, wherein an upper mold core (3) and a lower mold core (4) are installed between the upper mold base (1) and the lower mold base (2) in a stacked manner, and a molding cavity (5) is formed between the upper mold core (3) and the lower mold core (4), characterized in that: A first core-pulling structure (6) is installed on the right side between the upper mold base (1) and the lower mold base (2), a gate structure (7) is embedded in the upper mold base (1), and a second core-pulling structure (8) is provided at the bottom of the lower mold base (2). An inner groove (10) is provided on the lower mold core (4) directly below the gate structure (7). A flow divider cone (11) is inserted into the middle of the inner groove (10). A spherical arc surface (12) is provided on the top of the flow divider cone (11). Multiple ejector pins (13) are provided in both the flow divider cone (11) and the lower mold core (4). Multiple flow divider grooves (14) extending to the molding cavity (5) are provided on the outer periphery of the inner groove (10). The flow divider grooves (14) are radially distributed. The first core-pulling structure (6) includes a sliding seat (61) and a core-pulling slider (62) disposed in the sliding seat (61). One end of the core-pulling slider (62) is provided with a molding insert (63) inserted into the molding cavity (5). The front part of the molding insert (63) is provided with a molding shaft (64). The rear end of the core-pulling slider (62) is equipped with a first driving cylinder (65) for controlling the sliding of the core-pulling slider (62).

2. The die-casting mold for a wheelchair frame according to claim 1, characterized in that: The lower mold core (4) is provided with a number of hole forming pins (9) that are inserted into the forming mold cavity (5).

3. The die-casting mold for a wheelchair frame according to claim 1, characterized in that: The lower mold base (2) has mold feet (18) installed on both sides of its lower end face, and an ejector plate (19) is installed between the two mold feet (18). Multiple ejector pins (13) are vertically installed on the ejector plate (19), and a lower template (20) is fixedly provided at the lower end of the two mold feet (18).

4. The die-casting mold for a wheelchair frame according to claim 3, characterized in that: The second core-pulling structure (8) includes a second driving cylinder (81) fixedly installed on the lower template (20). The movable end of the second driving cylinder (81) is provided with a mounting plate (82). The mounting plate (82) is provided with forming core-pulling rods (83) inserted into the forming mold cavity (5) side by side.

5. The die-casting mold for a wheelchair frame according to claim 4, characterized in that: The lower mold core (4) is provided with a guide sleeve (84) that slides in cooperation with the forming core-pulling rod (83).

6. The die-casting mold for a wheelchair frame according to claim 1, characterized in that: Two molding inserts (15) are installed inside the upper mold core (3).

7. The die-casting mold for a wheelchair frame according to claim 1, characterized in that: The upper mold core (3) is detachably provided with a locking protrusion (16) on one side, and the lower mold core (4) is provided with a locking groove (17) corresponding to the locking protrusion (16).

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