A cast positioning mold structure with a spring pre-tightened knock-off surface

Abstract

The utility model discloses a kind of casting positioning die structure with spring pre-tightening knock dead surface, including fixed part, the inside of fixed part is penetrated and is provided with thimble, and the top of thimble is inserted with prop column, to realize thimble drive prop column to the pressing block of top and lift die opening operation, the outer wall of prop column is wrapped and is provided with spring, the top of fixed part is attached and is provided with pressing block, and pressing block is pressed in the end surface of spring and makes.The utility model is pre-tightening structure by spring, using the pre-tightening force generated when pressing block is attached fixed part to spring, effectively buffer die opening impact force, avoid casting deviation or drop, improve casting processing precision and die opening stability, by the aid of multiple positioning limiting structure of positioning pin and positioning hole, stop surface and stop block, ensure that each component of mould moves accurately, avoid circumferential rotation or lateral deviation, further guarantee casting positioning accuracy, prolong the service life of mould.

Description

Technical Field

[0001] This utility model relates to the field of mold processing and application technology, and in particular to a casting positioning mold structure with a spring preloaded dead surface. Background Technology

[0002] In the casting manufacturing process, molds are the core equipment for achieving casting forming and precise machining. Their positioning stability and mold opening smoothness directly affect the machining accuracy, production efficiency, and finished product qualification rate of the castings. Among them, the positioning mold, as a key component of casting machining, must ensure that the casting is fixed in position when the mold is closed and smoothly move the casting out of the mold cavity when the mold is opened to meet the needs of subsequent processing or assembly.

[0003] In the practical application of traditional casting positioning molds, there are generally two core technical problems: First, there is a lack of effective pre-tightening and buffering mechanisms. When the mold is closed, the casting is prone to slight displacement due to the poor fit of the positioning components. When the mold is opened, the driving force is transmitted directly and harshly, which can easily cause impact on the casting and mold components, resulting in surface damage to the casting or wear of internal mold components, thus shortening the mold's service life. Second, the positioning structure design is simple, relying only on simple mechanical limits, which makes it difficult to achieve high-precision coaxial positioning between the pressure block and the fixing component. During the mold opening process, the pressure block is prone to lateral displacement, which can lead to casting falling off or positional deviation, increasing the defect rate and failing to meet the mass production requirements of high-precision castings. Therefore, this utility model proposes a casting positioning mold structure with a spring pre-tightening dead surface. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a casting positioning mold structure with a spring preloaded dead surface, so as to solve the problems of unstable casting positioning and unstable transmission of driving force when the traditional mold is opened.

[0005] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: a casting positioning mold structure with a spring preloaded dead surface is provided, including a fixing member, an ejector pin is provided through the inside of the fixing member, and a support column is inserted into the top of the ejector pin, so as to realize the ejector pin driving the support column to lift the pressure block at the top for mold opening operation. The outer wall of the support column is wrapped with a spring, and the top of the fixing member is fitted with a pressure block, which presses against the end face of the spring. The pressure block is used to achieve the operation of the pressure block carrying the casting to open the mold stably.

[0006] The present invention is further configured such that: a settling groove is provided on the top of the fixing member, and a positioning hole is provided near the corner of the settling groove; an installation hole is provided at the center of the pressure block, and a positioning pin is threaded through near the corner; at the same time, the pressure block can be inserted into the corresponding positioning hole through the positioning pin until the pressure block fits against the inner bottom of the settling groove.

[0007] The above technical solution achieves precise engagement of the pressure block on the top of the fixing component by means of the settling groove, avoiding lateral displacement of the pressure block. The inner bottom of the settling groove also acts as a dead surface, allowing the pressure block to stop and be fixed when it contacts the inner bottom of the settling groove. At the same time, the position of the pressure block is further defined by the cooperation of the positioning pin and the positioning hole, ensuring the coaxiality and perpendicularity of the pressure block and the fixing component when they are in contact, laying the positioning foundation for subsequent spring pre-tensioning and stable mold opening.

[0008] The present invention is further configured such that: a push block is fixedly connected to the top of the ejector pin, and the push block is slidably connected to the inner wall of the movable cavity opened in the middle of the fixing member.

[0009] Through the above technical solution, the driving force of the ejector pin can be evenly transmitted to the support column through the push block. At the same time, the movable cavity provides guidance and limiting function for the push block, avoiding tilting or jamming of the push block during movement, ensuring the linearity and stability of the driving force transmission, and ensuring smooth mold opening operation.

[0010] The present invention is further configured such that: the push block is cylindrical, and its circumferential wall is provided with a stop surface, the stop surface being smoothly attached to the stop block fixedly connected to the inner wall of the movable cavity.

[0011] Through the above technical solution, the fit between the stop surface and the stop block can restrict the circumferential rotation of the push block in the active cavity, ensuring that the push block only slides along the axial direction, avoiding the displacement of the support column due to the rotation of the push block, thereby ensuring the stability of the casting positioning and the accuracy of the mold opening action.

[0012] The present invention is further configured such that: a through hole smaller than the inner diameter of the movable cavity is provided at the bottom of the inner side of the movable cavity, and the ejector pin passes through the through hole and is slidably connected thereto.

[0013] Through the above technical solution, the through hole guides the ejector pin, ensuring stable axial movement of the ejector pin; at the same time, the through hole, which is smaller than the inner diameter of the movable cavity, can axially limit the push block, preventing the push block from falling out of the movable cavity, thus ensuring the integrity of the mold structure and the safety of operation.

[0014] The present invention is further configured such that: a connecting column is fixedly connected to the bottom of the support column, and the connecting column is installed in the connecting hole opened on the top of the push block.

[0015] The above technical solution provides a detachable connection structure between the connecting column and the connecting hole, which facilitates the installation, disassembly, and replacement of the support column, reducing mold maintenance costs. At the same time, this connection method ensures a rigid connection between the support column and the push block, preventing relative displacement between the two and ensuring that the driving force of the ejector pin can be efficiently transmitted to the support column, thereby achieving stable lifting of the pressure block.

[0016] The present invention is further configured such that: the end face of the support column is flush with the inner bottom of the settling trough, and the end face of the spring wrapped around it abuts against the push block and the pressure block respectively.

[0017] With the above technical solution, the end face of the support column is flush with the bottom of the settling groove, which ensures that the support column and the bottom surface of the pressure block are in full contact when the pressure block is attached to the fixing part, providing stable support for the subsequent lifting action; at the same time, the two ends of the spring are respectively pressed against the push block and the pressure block. When the pressure block is attached to the fixing part, the spring is compressed to generate a preload force. This preload force can offset the impact force at the beginning of mold opening, making the mold opening action smoother, and can enhance the clamping stability of the pressure block on the casting, preventing the casting from shifting during the mold opening process.

[0018] The beneficial effects of this utility model are as follows: 1. The casting positioning mold structure with spring preload and dead surface proposed in this utility model effectively buffers the impact force of mold opening by utilizing the preload force generated by the spring when the pressure block is attached to the fixing part, thereby preventing the casting from shifting or falling off and improving the casting processing accuracy and mold opening stability. 2. The casting positioning mold structure with spring preload and dead surface proposed in this utility model ensures the precise movement of each component of the mold by means of multiple positioning and limiting structures such as positioning pins and positioning holes, and stop surfaces and stop blocks, avoiding circumferential rotation or lateral offset, further ensuring the positioning accuracy of the casting and extending the service life of the mold. Attached Figure Description

[0019] Figure 1 This is a structural diagram of a casting positioning mold structure with a spring preloaded dead surface according to the present invention; Figure 2 This is a cross-sectional view of a casting positioning mold structure with a spring preloaded dead surface according to the present invention; Figure 3 This is an exploded view of a casting positioning mold structure with a spring preloaded dead surface according to the present invention; Figure 4 This is a structural diagram of the fixing component in a casting positioning mold structure with a spring preloaded dead surface according to the present invention.

[0020] In the diagram: 1. Fixing component; 11. Settling tank; 12. Positioning hole; 13. Movable cavity; 14. Stop block; 15. Through hole; 2. Ejector pin; 21. Push block; 22. Stop surface; 23. Connecting hole; 3. Support column; 31. Connecting column; 4. Spring; 5. Pressure block; 51. Mounting hole; 52. Positioning pin. Detailed Implementation

[0021] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0022] like Figures 1-4 As shown, a casting positioning mold structure with a spring preloaded dead surface includes a fixing member 1. An ejector pin 2 is provided through the interior of the fixing member 1, and a support column 3 is inserted into the top of the ejector pin 2 to realize the ejector pin 2 driving the support column 3 to lift the pressure block 5 at the top for mold opening operation.

[0023] like Figure 3 and Figure 4 As shown, a settling groove 11 is provided on the top of the fixing component 1, and positioning holes 12 are provided near the corners of the settling groove 11. An installation hole 51 is provided at the center of the pressure block 5, and a positioning pin 52 is threaded through it near the corners. The pressure block 5 can be inserted into the corresponding positioning hole 12 through the positioning pin 52 until the pressure block 5 fits against the inner bottom of the settling groove 11. The settling groove 11 enables the pressure block 5 to be precisely fitted on the top of the fixing component 1, preventing the pressure block 5 from shifting laterally. The inner bottom of the settling groove 11 also acts as a dead surface, so that the pressure block 5 can stop and be fixed when it contacts the inner bottom of the settling groove 11. At the same time, the positioning... The engagement of pin 52 and positioning hole 12 further limits the position of pressure block 5, ensuring the coaxiality and perpendicularity of pressure block 5 and fixing part 1 when they are in contact. This lays the positioning foundation for the subsequent pre-tensioning of spring 4 and stable mold opening. The bottom of the movable cavity 13 is provided with a through hole 15 smaller than the inner diameter of the movable cavity 13. Ejector pin 2 passes through the through hole 15 and is slidably connected to it. The through hole 15 guides ejector pin 2, ensuring that ejector pin 2 moves stably along the axial direction. At the same time, the through hole 15 smaller than the inner diameter of the movable cavity 13 can axially limit the push block 21, preventing the push block 21 from falling out of the movable cavity 13, thus ensuring the integrity of the mold structure and the safety of operation. The top of the ejector pin 2 is fixedly connected to a push block 21, and the push block 21 is slidably connected to the inner wall of the movable cavity 13 opened in the middle of the fixing part 1. The driving force of the ejector pin 2 can be evenly transmitted to the support column 3 through the push block 21. At the same time, the movable cavity 13 provides guidance and limiting function for the push block 21, preventing the push block 21 from tilting or jamming during the movement, ensuring the linearity and stability of the driving force transmission, and ensuring smooth mold opening action. The push block 21 is cylindrical, and its circumferential wall is provided with a stop surface 22. The stop surface 22 is smoothly fitted to the stop block 14 fixedly connected to the inner wall of the movable cavity 13. The fit between the stop surface 22 and the stop block 14 can limit the circumferential rotation of the push block 21 in the movable cavity 13, ensuring that the push block 21 only slides along the axial direction, avoiding the offset of the support column 3 due to the rotation of the push block 21, thereby ensuring the stability of the casting positioning and the accuracy of the mold opening action. The bottom of the support column 3 is fixedly connected to the connecting column 31, and the connecting column 31 is installed in the connecting hole 23 opened on the top of the push block 21. The detachable connection structure between the connecting column 31 and the connecting hole 23 facilitates the installation, disassembly and replacement of the support column 3, reducing the mold maintenance cost. At the same time, this connection method can ensure the rigid connection between the support column 3 and the push block 21, avoid relative displacement between the two, and ensure that the driving force of the ejector pin 2 can be efficiently transmitted to the support column 3, so as to achieve the stable lifting of the pressure block 5.

[0024] like Figure 2 and Figure 3 As shown, a spring 4 is wrapped around the outer wall of the support column 3, and a pressure block 5 is attached to the top of the fixing member 1. The pressure block 5 is pressed against the end face of the spring 4. The preload force generated by the pressure block 5 on the spring 4 when it is attached to the fixing member 1 enables the pressure block 5 to carry the casting and open the mold stably. The end face of the support column 3 is flush with the bottom of the settling groove 11, and the end face of the spring 4 wrapped around it is pressed against the push block 21 and the pressure block 5 respectively. The flushness of the end face of the support column 3 with the bottom of the settling groove 11 ensures that the support column 3 and the bottom surface of the pressure block 5 are in full contact when the pressure block 5 is attached to the fixing member 1, providing stable support for the subsequent lifting action. At the same time, the two ends of the spring 4 are pressed against the push block 21 and the pressure block 5 respectively. When the pressure block 5 is attached to the fixing member 1, the spring 4 is compressed to generate a preload force. This preload force can offset the impact force at the beginning of the mold opening, making the mold opening action smoother and enhancing the clamping stability of the pressure block 5 on the casting, preventing the casting from shifting during the mold opening process.

[0025] In use, the casting is first installed in the mounting hole 51 of the pressure block 5. Then, the pressure block 5 is inserted into the positioning hole 12 of the settling groove 11 through the positioning pin 52 until the pressure block 5 fits against the bottom of the settling groove 11. At this time, the spring 4 is compressed to generate a pre-tightening force, which realizes the stable positioning of the casting. When the mold is opened, the ejector pin 2 is driven to move upward. The ejector pin 2 drives the push block 21 to slide along the axis of the movable cavity 13. The push block 21 pushes the pressure block 5 upward through the support column 3. At the same time, the pre-tightening force of the spring 4 assists in buffering, ensuring that the pressure block 5 carries the casting to open the mold smoothly. After the mold opening operation is completed, the ejector pin 2 is driven to reset in the opposite direction, and the next casting installation and mold opening cycle can be performed.

[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A casting positioning mold structure with a spring preloaded dead surface, comprising a fixing member (1), characterized in that: The fixing member (1) has a through-hole ejector pin (2), and a support column (3) is inserted into the top of the ejector pin (2) so that the ejector pin (2) drives the support column (3) to lift the top pressure block (5) to open the mold. The outer wall of the support column (3) is wrapped with a spring (4), and the top of the fixing member (1) is fitted with a pressure block (5), and the pressure block (5) is pressed against the end face of the spring (4). The pressure block (5) is used to apply the pre-tightening force to the spring (4) when it is fitted with the fixing member (1) to realize the operation of the pressure block (5) carrying the casting to open the mold stably.

2. The casting positioning mold structure with a spring preloaded dead surface according to claim 1, characterized in that: The top of the fastener (1) is provided with a settling groove (11), and the settling groove (11) is provided with positioning holes (12) near the corners. The center of the pressure block (5) is provided with an installation hole (51), and a positioning pin (52) is threaded through it near the corners. At the same time, the pressure block (5) can be inserted into the corresponding positioning hole (12) through the positioning pin (52) until the pressure block (5) fits against the inner bottom of the settling groove (11).

3. The casting positioning mold structure with a spring preloaded dead surface according to claim 2, characterized in that: The top of the ejector pin (2) is fixedly connected to a push block (21), and the push block (21) is slidably connected to the inner wall of the movable cavity (13) opened in the middle of the fixing member (1).

4. The casting positioning mold structure with a spring preloaded dead surface according to claim 3, characterized in that: The push block (21) is cylindrical, and its circumferential wall has a stop surface (22). The stop surface (22) is smoothly attached to the stop block (14) fixedly connected to the inner wall of the movable cavity (13).

5. A casting positioning mold structure with a spring-preloaded dead-end surface according to claim 4, characterized in that: The bottom of the movable cavity (13) has a through hole (15) smaller than the inner diameter of the movable cavity (13), and the ejector pin (2) passes through the through hole (15) and is slidably connected to it.

6. A casting positioning mold structure with a spring-preloaded dead-end surface according to claim 5, characterized in that: The bottom of the support column (3) is fixedly connected to a connecting column (31), and is installed in the connecting hole (23) opened on the top of the push block (21) through the connecting column (31).

7. A casting positioning mold structure with a spring-preloaded dead-end surface according to claim 6, characterized in that: The end face of the support column (3) is flush with the inner bottom of the settling trough (11), and the end face of the spring (4) wrapped around it is pressed against the push block (21) and the pressure block (5) respectively.

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