Hydraulic mechanical die-casting punch

Abstract

The utility model discloses a hydraulic mechanical die-casting punch which comprises a punch body, an expansion and contraction body, a supporting block and an outer ring block. A cavity is formed in the punch body, and an expansion and contraction body is installed in the cavity and can move front and back in the cavity in the advancing direction of the punch body. A plurality of through grooves leading to the cavity are formed in the side wall of the cylindrical body of the punch body and evenly distributed with the center of the cross section of the punch body as the circle center. A supporting block is mounted in each through groove; the number of the outer ring blocks is consistent with that of the supporting blocks; the multiple outer ring blocks are encircled to form a closed ring layer to cover at least part of the outer wall of the punch body; one end of each supporting block is in contact with the expansion and contraction body, and the other end is in contact with an outer ring; when the expansion and contraction bodies move, the supporting blocks are driven to stretch out and draw back, and the diameter of the closed-loop layer is increased or decreased. According to the technical scheme, after the outer wall of the die-casting punch is abraded, the outer circle size of a product can be kept, and the service life of the product is prolonged by multiple times.

Description

Technical Field

[0001] This utility model belongs to the field of die casting technology, and in particular to a hydraulic mechanical die casting punch. Background Technology

[0002] Die casting is a precision casting method that uses high pressure to force molten metal into a complex-shaped metal mold. The die casting punch is a crucial component in the die casting process, used to push the molten metal into the mold cavity, where it cools and solidifies. Traditional die casting punches have a fixed diameter. During operation, the high temperature of the molten metal and the pressure inside the mold chamber cause the punch to wear down, reducing its diameter until it reaches the end of its service life and must be replaced. To extend the service life of die casting punches, it is necessary to improve existing technologies. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, a hydraulic mechanical die-casting punch is proposed.

[0004] A hydraulic die-casting punch includes a punch body, an expansion and contraction body, a support block, and an outer ring block; wherein:

[0005] The punch body is cylindrical in shape; a cavity is provided inside the punch body, and the expansion and contraction body is installed inside the cavity; the expansion and contraction body can move back and forth within the cavity along the travel direction of the punch body.

[0006] Multiple through slots leading to the cavity are provided on the columnar sidewall of the punch body, and the through slots are evenly distributed with the center of the cross-section of the punch body as the center; the support block is installed in each of the through slots;

[0007] The number of outer ring blocks is the same as the number of support blocks; multiple outer ring blocks form a closed ring layer covering at least a portion of the outer wall of the punch body;

[0008] One end of each support block is in contact with the expansion and contraction body, and the other end is in contact with an outer ring; when the expansion and contraction body moves, it drives the support block to extend or retract, thereby expanding or shrinking the diameter of the closed-loop layer.

[0009] Preferably, it also includes a head ring, which is sleeved on one end of the punch body.

[0010] Preferably, the number of through slots is six, and the number of support blocks and outer ring blocks is also six.

[0011] Preferably, the cavity is a cylinder; the expansion and contraction body is cylindrical and has multiple grooves that can partially accommodate the support block.

[0012] Preferably, the end of the support block that contacts the outer ring block is provided with at least one positioning hole, and the outer ring block is provided with a positioning post that matches and engages with the positioning hole; or, the end of the support block that contacts the outer ring block is provided with at least one positioning post, and the outer ring block is provided with a positioning hole that matches and engages with the positioning hole.

[0013] Preferably, the outer ring block is an arc-shaped piece, and multiple outer ring blocks are arranged to form a cylinder; the projection of each support block on the cross-section of the punch body overlaps with the radius of the cylinder.

[0014] The hydraulic die-casting punch provided by this utility model works by using an expanding and contracting body to move back and forth within a cavity, driving a support block to extend and retract vertically at a slot on the side wall of the punch body. This, in turn, causes the corresponding outer ring block to move up and down, thereby expanding or shrinking the diameter of the closed-loop layer formed by the outer ring block. During use, when the outer wall of the die-casting punch wears down, the forward and backward movement of the expanding and contracting body can maintain the outer diameter of the product for continued use, extending the product's service life many times over. Attached Figure Description

[0015] Figure 1 This is a perspective view of the hydraulic mechanical die-casting punch in the embodiment of this utility model;

[0016] Figure 2 This is another perspective view of the hydraulic mechanical die-casting punch in the embodiment of this utility model;

[0017] Figure 3 This is an exploded view of the hydraulic mechanical die-casting punch in an embodiment of this utility model;

[0018] Figure 4 This is a cross-sectional view of the punch body in an embodiment of the present invention;

[0019] The markings in the accompanying drawings are as follows:

[0020] 1. Punch body; 11. Cavity; 12. Through groove; 2. Expansion and contraction body; 21. Groove; 3. Support block; 31. Positioning hole; 4. Closed-loop layer; 41. Outer ring block; 42. Positioning post; 5. Head ring. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] Provides a hydraulic mechanical die-casting punch, such as Figures 1 to 4As shown, it includes a punch body 1, an expansion and contraction body 2, a support block 3, and an outer ring block 4; wherein:

[0023] The punch body is cylindrical in shape, such as a cylinder, but not limited to this. A cavity 11 is provided inside the punch body for housing the expansion and contraction element. In one implementation, the cavity is cylindrical, but not limited to this. The expansion and contraction element can move back and forth within the cavity along the direction of travel of the punch body.

[0024] Multiple through slots 12 leading to the cavity are provided on the columnar sidewall of the punch body. The through slots are used to install support blocks. The through slots are evenly distributed with the center of the cross-section of the punch body as the center. For example, the number of through slots is 3, 6 or more.

[0025] The number of outer ring blocks corresponds to the number of support blocks. Multiple outer ring blocks form a closed-loop layer covering at least part of the outer wall of the punch body; at the same time, one end of each support block contacts the expansion and contraction body, and the other end contacts an outer ring.

[0026] During use, when the expansion and contraction body moves, it drives the support block to extend and retract within the through slot, which in turn causes the outer ring block to extend and retract synchronously, thereby expanding or shrinking the diameter of the closed-loop layer. This ensures that even after wear occurs on the outer wall, the outer ring block moves outward to maintain the original outer diameter, thus extending the service life of the die-casting punch.

[0027] Furthermore, it also includes a head ring 5, which is fitted onto one end of the punch body to provide reinforcement.

[0028] Furthermore, the expandable / contractable body is cylindrical and has multiple grooves 21 that can partially accommodate the support block. These grooves ensure stability during the movement of the support block. Understandably, the specific shape of the expandable / contractable body can be flexibly set and is not limited to this.

[0029] Furthermore, at least one positioning hole 31 is provided at the end of the support block that contacts the outer ring block, and a positioning post 41 that matches and engages with the positioning hole is provided on the outer ring block. Through the cooperation of the positioning hole and the positioning post, a more stable connection can be formed between the support block and the outer ring block, resulting in greater stability during movement. Understandably, the positions of the positioning hole and the positioning post can also be interchanged, with at least one positioning post provided at the end of the support block that contacts the outer ring block, while the outer ring block has a positioning hole that matches and engages with the positioning hole; the effect is the same.

[0030] Furthermore, the outer ring block is an arc-shaped piece, and multiple outer ring blocks together form a cylinder; the projection of each support block on the cross-section of the punch body overlaps with the radius of the cylinder. That is, after the support block is inserted into the through slot, its projection on the cross-section of the punch body is equivalent to the radius of the cylinder, and the arc-shaped outer ring block is the arc-shaped edge corresponding to this radius, so that the expansion and contraction body can exert force evenly to push the support block to move when moving back and forth, and drive the outer ring block to move synchronously.

[0031] The above is a description of the present utility model to help understand it; however, the implementation of the present utility model is not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A hydraulic mechanical die-casting punch, characterized in that, It includes the punch body, the expansion and contraction body, the support block, and the outer ring block; wherein: The punch body is cylindrical in shape; a cavity is provided inside the punch body, and the expansion and contraction body is installed inside the cavity; the expansion and contraction body can move back and forth within the cavity along the travel direction of the punch body. Multiple through slots leading to the cavity are provided on the columnar sidewall of the punch body, and the through slots are evenly distributed with the center of the cross-section of the punch body as the center; the support block is installed in each of the through slots; The number of outer ring blocks is the same as the number of support blocks; multiple outer ring blocks form a closed ring layer covering at least a portion of the outer wall of the punch body; One end of each support block is in contact with the expansion and contraction body, and the other end is in contact with an outer ring; when the expansion and contraction body moves, it drives the support block to extend or retract, thereby expanding or shrinking the diameter of the closed-loop layer.

2. The hydraulic mechanical die-casting punch as described in claim 1, characterized in that, It also includes a head ring, which is sleeved on one end of the punch body.

3. The hydraulic mechanical die-casting punch as described in claim 1, characterized in that, The number of through slots is six, and the number of support blocks and outer ring blocks is also six.

4. The hydraulic mechanical die-casting punch as described in claim 1, characterized in that, The cavity is cylindrical; the expansion and contraction body is cylindrical and has multiple grooves that can partially accommodate the support block.

5. The hydraulic mechanical die-casting punch as described in claim 1, characterized in that, The support block has at least one positioning hole at one end that contacts the outer ring block, and the outer ring block has a positioning post that matches and engages with the positioning hole; or, the support block has at least one positioning post at one end that contacts the outer ring block, and the outer ring block has a positioning hole that matches and engages with the positioning hole.

6. The hydraulic mechanical die-casting punch as described in any one of claims 1 to 5, characterized in that, The outer ring block is an arc-shaped piece, and multiple outer ring blocks are combined to form a cylinder; the projection of each support block on the cross-section of the punch body overlaps with the radius of the cylinder.

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