Edgeless cylinder mold structure suitable for multi-sided molds

Abstract

The invention discloses a sideless cylinder type mold structure suitable for a polygonal mold, comprising a bottom plate, a lower mold on the bottom plate, a side mold, a top mold and an ejector plate, wherein the side molds form a relatively closed circle toward the middle of the bottom plate, triangular guide blocks are arranged between the side molds at positions toward the outer sides of the bottom plate, side mold guide grooves obliquely arranged toward the lower middle side of the bottom plate are arranged between the side molds and the triangular guide blocks, and a T-shaped sliding block is arranged at the upper end of the side mold; the design of the side molds forming a circle and controlling the overall core pulling through the ejector plate eliminates the original oil cylinder structure, which not only reduces the production cost, but also simplifies the equipment operation and improves the production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of mold casting, in particular to a borderless cylinder type mold structure suitable for a polygonal mold. Background Art

[0002] At present, most aluminum alloy wheels on the market are produced by low-pressure casting. Low-pressure casting equipment is required in production. The equipment is generally equipped with 2 or 4 sets of side core-pulling cylinders, which can complete core-pulling actions in 2 or 4 directions. When core-pulling actions in more than 4 directions are required, the casting equipment can only be modified or core-pulling cylinders can be installed on the mold or an inclined core-pulling structure can be designed. This method will lead to cumbersome on-site operations, cause production instability, and the cost of implementation is not low. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a borderless cylinder type mold structure suitable for a polygonal mold.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] The sideless cylinder mold structure suitable for a polygonal mold includes a bottom plate, a lower mold on the bottom plate, a side mold, a top mold, and an ejector plate. The side molds are arranged in a relatively closed circle toward the middle of the bottom plate. A triangular guide block is arranged between the side molds toward the outer side of the bottom plate. A side mold guide groove is arranged between the side molds and the triangular guide block, which is inclined toward the lower middle side of the bottom plate. A T-shaped slider is arranged at the upper end of the side mold, wherein the T-shaped slider includes a horizontal portion at the upper end and a vertical portion at the lower end, wherein the vertical portion is connected to the side mold, and the horizontal portion passes through the ejector plate upward. Trapezoidal guide blocks are arranged at both sides of the ejector plate corresponding to the horizontal portion, wherein the upper side of the trapezoidal guide block is a horizontal surface, and the trapezoidal guide block is an inclined surface toward the outer side of the bottom plate. Horizontal guide grooves are opened on both sides of the horizontal portion, wherein the horizontal guide grooves include a horizontal groove and a horizontal inclined groove, wherein the horizontal groove corresponds to the upper plane of the trapezoidal guide block, and the horizontal inclined groove corresponds to the inclined surface of the trapezoidal guide block.

[0006] As a preferred option, a wear-resistant strip is provided on the side mold guide groove of the triangular guide block, and a fine-tuning adjustment block is provided between the wear-resistant strip and the side mold guide groove.

[0007] As a preferred option, a casting heat node insert is provided on the side mold, and a cooling channel is provided in the casting heat node insert.

[0008] The beneficial effects of the present invention are: the design of forming a circle through the side molds and controlling the overall core pulling through the ejector plate eliminates the original oil cylinder structure, which not only reduces the production cost, but also simplifies the equipment operation and improves the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0010] Figure 1 is a stereogram of the present invention;

[0011] Figure 2 It is a three-dimensional diagram after removing some components such as the ejector plate in the present invention;

[0012] Figure 3 It is a schematic diagram of four side molds in the prior art;

[0013] Figure 4 It is a schematic diagram of an embodiment of the present invention with five side molds. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical scheme and advantages of the present application more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. In order to thoroughly understand the present invention, some specific details will be involved in the following description. In the absence of these specific details, the invention can still be implemented, that is, those skilled in the art can use these descriptions and statements here to more effectively introduce the essence of their work to other technicians in the field.

[0015] Reference Figure 1 , Figure 2 , a borderless cylinder mold structure suitable for a polygonal mold, including a bottom plate 1, a lower mold 2 on the bottom plate 1, a side mold 3, a top mold 4, and an ejector plate 5. The side mold 3 forms a relatively closed circle toward the middle of the bottom plate 1, and cooperates with the top mold 4 and the lower mold 2 to form a sufficiently sealed cavity space to form the casting. Under the action of external pressure, the aluminum liquid in the crucible flows upward along the riser pipe until it fills the entire cavity space; the external pressure is maintained continuously, and as time goes by, the casting completes the entire process of shrinkage compensation, solidification, and cooling. Reference Figure 3 Since the side mold cavity of the aluminum alloy wheel mold is arc-shaped, when the number of side molds is small, the curvature is large, and the distance of heat conduction from the core of the side mold to the outer periphery is long; when the curvature is large, the deformation of the side mold is also increased. Therefore, the number of side molds 3 of the aforementioned mold is more than four, for example, referring to Figure 4, when 5 side molds are used, the casting temperature field is more uniform, which is beneficial to improve the product qualification rate. At the same time, since the mold side mold casting has more heat nodes 10, and each heat node 10 is often staggered with the relative position of the side mold of the original technology. For example, some side molds have two heat nodes 10 facing each other, and some side molds have only one, and the positions are different, resulting in that the cooling block of the side mold can only be made larger, and there are many restrictions. Therefore, after the aforementioned mold increases the number of side molds, the number of side molds and the number of heat nodes 10 are easy to correspond to each other, and it is easy to ensure that the position corresponding to each heat node 10 and the side mold is one-to-one corresponding, and each cooling block can also be made the same, specifically, the position can be the same, the cooling block size and structure can be the same, that is, the side mold cooling block can also be made smaller and more precise accordingly, and it can ensure that the cooling of each heat node 10 position can be the same.

[0016] A triangular guide block 6 is arranged between the side molds 3 toward the outer side of the bottom plate 1, and a side mold guide groove 7 is arranged between the side mold 3 and the triangular guide block 6, which is inclined toward the lower middle side of the bottom plate and is used to fix the triangular guide block 6. Therefore, the triangular guide block 6 can guide the side mold 3 to slide and pull the core through the side mold guide groove 7.

[0017] A T-shaped slider 8 is provided at the upper end of the side mold 3, wherein the T-shaped slider 8 includes a horizontal portion 81 at the upper end and a vertical portion 82 at the lower end, wherein the vertical portion 82 is connected to the side mold 3, and the horizontal portion 81 passes through the ejection plate 5 upward, that is, the horizontal portion 81 of the T-shaped slider 8 is located above the ejection plate 5, and the side mold 3 is located below the ejection plate 5.

[0018] Trapezoidal guide blocks 51 are arranged on both sides of the ejector plate 5 corresponding to the horizontal portion 81. The upper side of the trapezoidal guide block 51 is a horizontal surface, and the trapezoidal guide block 51 is an inclined surface toward the outer side of the bottom plate. Horizontal guide grooves 9 are opened on both sides of the horizontal portion 81, wherein the horizontal guide grooves 9 include a horizontal groove 91 and a horizontal inclined groove 92. The horizontal groove 91 corresponds to the upper plane of the trapezoidal guide block 51, and the horizontal inclined groove 92 corresponds to the inclined surface of the trapezoidal guide block 51. When the ejector plate 5 is lifted, the inclined surface of the trapezoidal guide block 51 can guide the T-shaped slider 8 to retreat slightly until the upper side of the trapezoidal guide block 51 is attached to the horizontal groove 91 of the horizontal portion of the T-shaped slider 8. At this time, the side mold guide groove 7 can guide the side mold 3 to pull out the core, and the horizontal groove 91 of the horizontal portion can also guide the side mold 3 to pull out the core at the upper side of the side mold 3. When the mold is closed, the side mold guide groove 7 assembled on the side mold 3 touches the side mold guide groove 7 on the triangular guide block 6 to cooperate, forcing all the side molds 3 to move toward the center to complete the core pulling and closing action; when the mold is opened to a certain distance, the T-shaped slider 8 assembled on the top of the side mold 3 is acted upon by the ejection plate 5 and moves downward, forcing the side mold 3 to move downward holding the casting to complete the casting ejection action, and then the T-shaped slider 8 touches other parts on the mold, and the movement direction changes from vertical downward to horizontal divergent outward, forcing the side mold 3 to move outward to complete the core pulling action.

[0019] After the mold is opened, the casting moves upward a certain distance along with the top mold 4 and the side mold 3. Under the action of the ejection cylinder force of the equipment, the side mold 3 moves downward and pushes the casting out of the top mold 4. Then the side mold 3 moves laterally to complete the core pulling action. After breaking away from the restraint of the side mold 3, the casting falls freely into the receiving tray.

[0020] As a preferred method, a wear-resistant strip 71 is provided on the side mold guide groove 7, and the wear resistance of the wear-resistant strip 71 can be used to improve the life of the mold. After the wear-resistant strip 71 is installed, the outer surface of the wear-resistant strip 71 serves as the guide surface of the side mold guide groove 7. A wear-resistant strip 71 is provided on the side mold guide groove 7 of the triangular guide block 6, and a fine-tuning adjustment block 72 is provided between the wear-resistant strip 71 and the side mold guide groove 7, so that the fine-tuning adjustment block 72 can be moved back and forth to adjust the position of the wear-resistant strip 71, which is used to adjust the gap between the side mold 3 and the triangular guide block 6 and even the gap between the molds of the entire mold, so as to avoid casting flash caused by inadequate mold closing. The fine-tuning adjustment block 72 can be specifically connected to the side mold guide groove 7 by an elongated hole and a screw, and the position of the fine-tuning adjustment block 72 can be fine-tuned by adjusting the relative position of the elongated hole and the screw.

[0021] The side mold 3 is provided with a casting heat node insert 31 as a side mold cooling block, and a cooling channel is provided in the casting heat node insert 31. During production, the casting heat node insert 31 is directed to the casting heat node position, and the cooling medium passing into the cooling channel accelerates the removal of the heat of the casting, improves the quality of the casting, and improves the production efficiency. The heat absorbed and lost from the casting by each side mold 3 and the heat node insert 31 is the same, because the side mold and the heat node insert 31 correspond to the same heat node 10. Specifically in this embodiment, when there are 5 heat nodes 10, 5 side molds 3 are set. When there are 6 heat nodes 10, 3 or 6 side molds 3 are set, and when there are 4 or 8 heat nodes 10, 4 side molds 3 are set. Considering that the current casting equipment has only 4 core pulling cylinders, the aforementioned mold does not need to use the core pulling cylinder, can get rid of the limitation of the core pulling cylinder, and the adaptability can be improved.

[0022] According to the above principle, the present invention can also make appropriate changes and modifications to the above implementation. Therefore, the present invention is not limited to the specific implementation disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention.

[0023] Practice has proven that since the mold structure can realize the side mold core pulling movement and closing, the number of side molds that make up the circle can be flexibly designed according to casting needs. When the number of side molds is the same as the number of spokes, or in a certain proportion, the cooling structure of each side mold can be designed to be the same, so the casting temperature field of each side mold is consistent, which is conducive to producing castings with uniform internal quality and improving the casting yield rate. At the same time, the side mold core pulling does not require a cylinder, which also reduces production costs.

Claims

1. A borderless cylinder mold structure suitable for a polygonal mold, comprising a bottom plate (1), a lower mold (2) on the bottom plate (1), a side mold (3), a top mold (4), and an ejector plate (5), characterized in that: The side molds (3) are arranged in a relatively closed circle toward the middle of the bottom plate (1); a triangular guide block (6) is arranged between the side molds (3) at a position toward the outside of the bottom plate (1); and a side mold guide groove (7) is arranged between the side molds (3) and the triangular guide block (6) and is inclined toward the lower middle side of the bottom plate; A T-shaped slider (8) is provided at the upper end of the side mold (3), wherein the T-shaped slider (8) comprises a horizontal portion (81) at the upper end and a vertical portion (82) at the lower end, wherein the vertical portion (82) is connected to the side mold (3), and the horizontal portion (81) passes through the ejection plate (5) upwards. Trapezoidal guide blocks (51) are provided on the ejection plate (5) at both sides corresponding to the horizontal portion (81), wherein the upper side of the trapezoidal guide block (51) is a horizontal surface, and the trapezoidal guide block (51) is an inclined surface toward the outer side of the bottom plate; Horizontal guide grooves (9) are formed on both sides of the horizontal portion (81), wherein the horizontal guide grooves (9) include horizontal grooves (91) and horizontal inclined grooves (92), the horizontal grooves (91) correspond to the upper plane of the trapezoidal guide block (51), and the horizontal inclined grooves (92) correspond to the inclined surface of the trapezoidal guide block (51); The number of the side molds (3) is the same as the number of spokes; a casting hot node insert (31) is provided on the side mold (3); a cooling channel is provided in the casting hot node insert (31); each side mold (3) and the casting hot node insert (31) correspond to the hot node (10) of the casting; and the cooling structure of each side mold (3) is the same.

2. A borderless cylinder mold structure suitable for a polygonal mold according to claim 1, characterized in that: A wear-resistant strip (71) is provided on the side mold guide groove (7) of the triangular guide block (6), and a fine adjustment block (72) is provided between the wear-resistant strip (71) and the side mold guide groove (7).

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