A casting mold with a squeezing and pre-extraction linkage mechanism

Abstract

The utility model discloses a castings mould with extrusion and pre -extraction linkage mechanical mechanism, including the pre -extraction mechanism of being installed inside upper die and lower die and mutually adaptive movement, to realize the pre -extraction disengagement operation of castings product when opening mould, the extrusion mechanism of being connected to pre -extraction mechanism, to realize the extrusion formation operation of castings product after filling type slant face hole, pre -extraction mechanism includes bolt connection in upper die's guide pillar and movable connection in lower die's guide slide block, and guide pillar is inserted in guide slide block, one end of guide slide block is connected with the push plate of sliding, and extrusion mechanism part is installed in the inside of push plate, and is fixed through the fixed plate limit of bolt connection in push plate end face simultaneously. The utility model only realizes extrusion action through a group of oil cylinder, and pre -extraction action is completed through the mechanical linkage of guide pillar and guide slide block when opening mould, and the use number of oil cylinder is reduced greatly, and the problem that die -casting machine signal valve control is difficult, interface can not be connected is solved.

Description

Technical Field

[0001] This utility model relates to the field of mold application technology, and in particular to a casting mold with a mechanical mechanism that links extrusion and pre-extraction. Background Technology

[0002] In the casting production process, castings with side or beveled holes are prone to quality defects such as internal shrinkage cavities after filling due to their special hole structure, affecting the performance of the casting. To solve this problem, existing technologies often use multiple sets of hydraulic cylinders to drive the extrusion component and the pre-extraction component separately to achieve hole extrusion forming and casting pre-extraction separation.

[0003] However, this method has obvious shortcomings: on the one hand, the use of multiple hydraulic cylinders increases the difficulty of controlling the signal valves of the die casting machine, and problems such as signal delay and malfunction are likely to occur; on the other hand, some die casting machines are limited by the number of interfaces and installation space, and cannot be effectively connected with multiple sets of hydraulic cylinders, resulting in complex mold operation and poor stability, which makes it difficult to meet the needs of efficient and high-quality casting production. Therefore, this utility model proposes a casting mold with a mechanical mechanism that links extrusion and pre-extraction. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a casting mold with a mechanical mechanism that links extrusion and pre-extraction, which is relatively convenient and stable to operate, effectively reduces the use of hydraulic cylinders, and solves the problems of difficult control and inability to connect signal valves in die casting machines.

[0005] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: a casting mold with a mechanical mechanism for extrusion and pre-extraction linkage is provided, including a pre-extraction mechanism installed inside the upper mold and the lower mold and adapted to each other to move, so as to realize the pre-extraction and separation operation of the casting product when the mold is opened; The extrusion mechanism connected to the pre-extraction mechanism enables the extrusion forming operation of the inclined holes in the casting product after filling.

[0006] The present invention is further configured such that: the pre-extraction mechanism includes a guide post bolted to the upper mold and a guide slider movably connected to the lower mold, and the guide post is inserted through the guide slider. One end of the guide slider is slidably connected to a push plate, and a part of the extrusion mechanism is installed inside the push plate. At the same time, it is limited and fixed by a fixing plate bolted to the end face of the push plate.

[0007] Through the above technical solutions, the bolted connection between the guide post and the upper mold ensures that the two move rigidly and synchronously. The movable connection between the guide slider and the lower mold provides it with lateral sliding space. The design of the guide post penetrating into the guide slider can directly transmit the vertical movement of the upper mold opening or closing to the guide slider. The sliding connection between the guide slider and the push plate realizes the secondary transmission of movement. At the same time, the extrusion mechanism is assembled in the push plate and fixed by the bolts of the fixed plate. This not only avoids the displacement deviation of the extrusion mechanism during movement, but also ensures that it moves synchronously with the push plate, laying the structural foundation for the linkage between the pre-extrusion mechanism and the extrusion mechanism.

[0008] The present invention is further configured such that: the bottom of the guide post is inclined, and the inside of the guide slider is provided with a shoe groove that is adapted to the inclined part of the guide post.

[0009] Through the above technical solution, the inclined structure at the bottom of the guide pillar and the matching inclined groove inside the guide slider form an inclined surface mating pair. When the mold is opened, the upper mold drives the guide pillar to move vertically upward. The inclined side wall of the pillar and the inner wall of the inclined groove generate an interaction force, which converts the vertical driving force into the lateral sliding driving force of the guide slider along the lower mold. This design does not require an additional power source and can realize the automatic movement of the guide slider through mechanical structure alone, providing power transmission logic for the pre-extraction action. At the same time, the inclined surface mating can reduce the impact of movement and ensure the smoothness of the guide slider sliding.

[0010] The present invention is further configured such that the connection between the guide slider and the push plate is provided in an inclined plane through mutually adapted sliding grooves.

[0011] Through the above technical solution, the lateral sliding of the guide slider is transmitted to the push plate through the inclined slide groove. The inclined structure can decompose the lateral force into a driving force along the preset trajectory of the push plate, so that the push plate moves smoothly along the inclined surface. On the one hand, the inclined surface can buffer the impact force of the lateral movement of the guide slider, avoiding damage to the push plate and the extrusion mechanism assembled therein. On the other hand, by designing the angle of the inclined surface, the movement stroke and speed of the push plate can be precisely controlled to ensure that the pre-extraction action force is moderate, which can not only achieve complete separation of the casting from the mold, but also prevent damage to the casting due to excessive action.

[0012] The present invention is further configured such that: the extrusion mechanism includes a hydraulic cylinder installed inside the push plate, the driving end of the hydraulic cylinder passes through the fixed plate and is fixedly connected to a connector, and a connecting sleeve is sleeved through the connector, and an extrusion pin is movably arranged inside the connecting sleeve, and the extrusion pin passes through one end of the connecting sleeve, while its end is extruded into the interior of the casting body.

[0013] Through the above technical solution, the hydraulic cylinder provides extrusion driving force as a single power source. After its driving end passes through the fixed plate, it forms a power transmission chain of "hydraulic cylinder-connector-connecting sleeve-extrusion pin" through the sleeve engagement of the connector and the connecting sleeve, directly transmitting the driving force of the hydraulic cylinder to the extrusion pin. The design of the extrusion pin passing through the connecting sleeve and extruding its end into the interior of the casting body can be used to target the inclined hole area of ​​the casting, eliminating quality defects such as internal shrinkage holes after filling through extrusion. At the same time, the extrusion mechanism is integrated into the push plate and can participate in the pre-extrusion action synchronously with the push plate, realizing seamless linkage of "extrusion forming-pre-extrusion release" without the need for additional control steps.

[0014] The present invention is further configured such that: a plug is provided inside the connecting sleeve, and the end face of the plug abuts against the connecting head and the T-shaped end of the extrusion pin located inside the connecting sleeve.

[0015] Through the above technical solution, the plug forms a rigid support structure inside the connecting sleeve. Its two ends abut against the connecting head and the T-shaped end of the extrusion pin, respectively, which can completely eliminate the gap between the connecting head and the extrusion pin, avoid energy loss or impact during power transmission, and ensure that the driving force of the hydraulic cylinder is fully applied to the extrusion pin. At the same time, the tight fit between the T-shaped end of the extrusion pin and the plug can limit the axial displacement of the extrusion pin in the connecting sleeve, prevent the extrusion pin from falling off in the non-working state or moving during the extrusion process, and ensure that the extrusion pin is always aligned with the target position of the inclined hole in the casting body, thereby improving the extrusion molding accuracy and reliability.

[0016] The present invention is further configured such that: a pin sleeve is slidably connected to the extrusion pin near the top position, and the pin sleeve is installed inside the lower mold.

[0017] Through the above technical solution, the pin sleeve is fixed inside the lower die and forms a sliding fit with the extrusion pin, providing a fixed guide trajectory for the extension and retraction movement of the extrusion pin, avoiding radial offset or wobbling during the movement of the extrusion pin, ensuring that the extrusion pin always moves along the axial direction of the inclined hole of the casting body, and further improving the accuracy of the extrusion position; at the same time, the pin sleeve can isolate the direct contact friction between the extrusion pin and the lower die, reduce the wear of the extrusion pin in high-frequency movement, extend the service life of the extrusion pin, and ensure the stability and consistency of the extrusion action in long-term use.

[0018] The beneficial effects of this utility model are as follows: 1. The casting mold proposed in this utility model has a mechanical mechanism that links extrusion and pre-extraction. After the casting is filled, the extrusion mechanism actively extrudes the inclined holes, which can effectively eliminate defects such as shrinkage cavities in the holes and significantly improve the forming quality and mechanical properties of the holes in the casting. 2. The casting mold with extrusion and pre-extraction linkage mechanism proposed in this utility model achieves extrusion and pre-extraction actions through mechanical linkage, eliminating the need for additional manual intervention. The overall operation process of the mold is simplified, and the components are connected by inclined planes and sliding grooves, resulting in high motion accuracy and strong long-term stability. 3. The casting mold with extrusion and pre-extraction linkage mechanism proposed in this utility model adopts the "single oil cylinder + mechanical linkage" design, which realizes the extrusion action with only one set of oil cylinders. The pre-extraction action is completed by the mechanical linkage of the guide pillar and the guide slide during mold opening, which greatly reduces the number of oil cylinders used and solves the problems of difficult control of signal valves and incompatible interface connection in die casting machines. Attached Figure Description

[0019] Figure 1 This is a first structural diagram of a casting mold with a mechanical mechanism for extrusion and pre-extraction linked together according to the present invention; Figure 2 This is a second structural diagram of a casting mold with a linkage mechanism for extrusion and pre-extraction according to the present invention; Figure 3 This is a front view of a casting mold with a linkage mechanism for extrusion and pre-extraction according to the present invention. Figure 4 This is a cross-sectional view of a casting mold with a linkage mechanism for extrusion and pre-extraction according to the present invention. Figure 5 This is a cross-sectional view of the extrusion mechanism in a casting mold with a linkage mechanism for extrusion and pre-extrusion.

[0020] In the figure: 1. Pre-extraction mechanism; 11. Guide post; 12. Guide slide; 13. Push plate; 14. Fixing plate; 2. Extrusion mechanism; 21. Hydraulic cylinder; 22. Connector; 23. Connecting sleeve; 24. Extrusion pin; 25. Plug; 26. Pin sleeve; 27. Casting body. 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 1-4As shown, a casting mold with a combined extrusion and pre-extraction mechanism includes a pre-extraction mechanism 1 installed inside an upper mold and a lower mold and adapted to move in a mutually compatible manner, so as to realize the pre-extraction and detachment operation of the casting product when the mold is opened. The pre-extraction mechanism 1 includes a guide post 11 bolted to the upper mold and a guide slide 12 movably connected to the lower mold, with the guide post 11 inserted through the guide slide 12. One end of the guide slide 12 is slidably connected to a push plate 13, and a portion of the extrusion mechanism 2 is installed inside the push plate 13, and is limited and fixed by a fixing plate 14 bolted to the end face of the push plate 13. The guide post 11 and the upper mold are bolted together. The bolted connection ensures the rigid synchronous movement of the two. The movable connection between the guide slider 12 and the lower mold provides it with lateral sliding space. The design of the guide post 11 penetrating and inserting into the guide slider 12 can directly transmit the vertical movement of the upper mold opening or closing to the guide slider 12. The sliding connection between the guide slider 12 and the push plate 13 realizes the secondary transmission of movement. At the same time, the extrusion mechanism 2 is partially assembled in the push plate 13 and fixed by the bolts of the fixing plate 14. This not only avoids the displacement deviation of the extrusion mechanism 2 during movement, but also ensures that it moves synchronously with the push plate 13, laying the structural foundation for the linkage between the pre-extraction mechanism 1 and the extrusion mechanism 2. The bottom of the guide post 11 is inclined, and the inside of the guide slider 12 is provided with a groove that matches the inclined part of the guide post 11. The inclined structure at the bottom of the guide post 11 and the matching groove inside the guide slider 12 form an inclined surface mating pair. When the mold is opened, the upper mold drives the guide post 11 to move vertically upward. The inclined side wall of the post and the inner wall of the inclined groove generate an interaction force, which converts the vertical driving force into the lateral sliding driving force of the guide slider 12 along the lower mold. This design does not require an additional power source. The automatic movement of the guide slider 12 can be realized through mechanical structure alone, providing power transmission logic for the pre-extraction action. At the same time, the inclined surface mating can reduce the impact of movement and ensure the smoothness of the sliding of the guide slider 12.

[0023] like Figure 4 As shown, the connection between the guide slider 12 and the push plate 13 is arranged in an inclined plane through mutually adapted sliding grooves. The lateral sliding of the guide slider 12 is transmitted to the push plate 13 through the inclined sliding grooves. The inclined structure can decompose the lateral force into a driving force along the preset trajectory of the push plate 13, so that the push plate 13 moves smoothly along the inclined plane. On the one hand, the inclined plane can buffer the impact force of the lateral movement of the guide slider 12, and avoid damage to the push plate 13 and the extrusion mechanism 2 assembled therein. On the other hand, by designing the angle of the inclined plane, the movement stroke and speed of the push plate 13 can be precisely controlled to ensure that the pre-extraction action force is moderate, so as to achieve complete separation of the casting from the mold and prevent damage to the casting due to excessive action.

[0024] like Figure 4 and Figure 5As shown, the extrusion mechanism 2, connected to the pre-extraction mechanism 1, performs the extrusion forming operation of the inclined holes in the casting product after filling. The pre-extraction mechanism 1 converts vertical motion into horizontal motion during mold opening, causing the extrusion mechanism 2 to detach axially along the inclined holes of the casting. The extrusion mechanism 2 includes a hydraulic cylinder 21 installed inside the push plate 13. The drive end of the hydraulic cylinder 21 passes through the fixed plate 14 and is fixedly connected to a connector 22. A connecting sleeve 23 is sleeved through the connector 22. An extrusion pin 24 is movably disposed inside the connecting sleeve 23, passing through one end of the connecting sleeve 23 and pressing its end against the interior of the casting body 27. The hydraulic cylinder 21 serves as a single power source. The extrusion driving force is provided by the drive end of the cylinder 21, which passes through the fixed plate 14 and is connected to the connecting sleeve 23 through the connector 22 to form a power transmission chain of "cylinder 21-connector 22-connecting sleeve 23-extrusion pin 24". The driving force of the cylinder 21 is directly transmitted to the extrusion pin 24. The design of the extrusion pin 24 passing through the connecting sleeve 23 and pressing its end into the casting body 27 can be used to target the inclined hole area of ​​the casting and eliminate quality defects such as internal shrinkage holes after filling by extrusion. At the same time, the extrusion mechanism 2 is integrated into the push plate 13 and can participate in the pre-extraction action synchronously with the push plate 13 to achieve seamless linkage of "extrusion forming-pre-extraction release" without the need for additional control steps.

[0025] like Figure 5 As shown, a plug 25 is provided inside the connecting sleeve 23, and the end face of the plug 25 abuts against the connecting head 22 and the T-shaped end of the extrusion pin 24 located inside the connecting sleeve 23. The plug 25 forms a rigid support structure inside the connecting sleeve 23, and its two ends abut against the connecting head 22 and the T-shaped end of the extrusion pin 24 respectively, which can completely eliminate the gap between the connecting head 22 and the extrusion pin 24, avoid energy loss or impact during power transmission, and make the driving force of the hydraulic cylinder 21 fully act on the extrusion pin 24. At the same time, the abutting fit between the T-shaped end of the extrusion pin 24 and the plug 25 can limit the axial displacement of the extrusion pin 24 in the connecting sleeve 23, prevent the extrusion pin 24 from falling off in the non-working state or moving during the extrusion process, and ensure that the extrusion pin 24 is always aligned with the target position of the inclined hole of the casting body 27, thereby improving the extrusion molding accuracy and reliability.

[0026] like Figure 5 As shown, a sleeve 26 is slidably connected to the extrusion pin 24 near its top position. The sleeve 26 is installed inside the lower die and is fixed inside the lower die, forming a sliding fit with the extrusion pin 24. This provides a fixed guide trajectory for the extension and retraction movement of the extrusion pin 24, preventing radial offset or wobbling during the movement of the extrusion pin 24. This ensures that the extrusion pin 24 always moves along the axis of the inclined hole of the casting body 27, further improving the accuracy of the extrusion position. At the same time, the sleeve 26 can isolate the extrusion pin 24 from direct contact friction with the lower die, reducing the wear of the extrusion pin 24 in high-frequency movement, extending the service life of the extrusion pin 24, and ensuring the stability and consistency of the extrusion action during long-term use.

[0027] In use, this invention first closes the mold and completes the filling operation of the casting body 27. Then, the hydraulic cylinder 21 in the extrusion mechanism 2 is activated. Its driving end passes through the fixed plate 14 and drives the connecting sleeve 23 to move through the connector 22. The plug 25 inside the connecting sleeve 23 transmits the driving force to the extrusion pin 24, causing the extrusion pin 24 to slide along the pin sleeve 26 installed in the lower mold. Its end extends into the inclined hole of the casting body 27 to complete the extrusion, thereby eliminating the shrinkage cavity inside the hole. After the extrusion is completed, the mold opening stage begins. The upper mold drives the guide post 11 in the pre-extraction mechanism 1, which is bolted to it, to move upward. Due to the bottom of the guide post 11... The part is inclined and cooperates with the matching inclined groove inside the guide slider 12 which is movably connected to the lower mold. The vertical movement of the guide post 11 is converted into the lateral sliding of the guide slider 12. The guide slider 12 then drives the push plate 13 to move through the matching inclined sliding groove at the connection with the push plate 13 (the extrusion mechanism 2 is installed in the push plate 13 and is limited and fixed by the fixed plate 14, and moves synchronously with the push plate 13), realizing the pre-extraction and separation operation of the casting body 27. Finally, the driving end of the hydraulic cylinder 21 is reset, the extrusion pin 24 retracts along the pin sleeve 26, and the casting body 27 is ejected to complete the part removal, thus completing a complete casting production process.

[0028] 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 mold with a linkage mechanism for extrusion and pre-extraction, characterized in that: include The pre-extraction mechanism (1) is installed inside the upper and lower molds and can be adapted to each other for movement. It is used to perform a pre-extraction and removal operation on the casting product when the mold is opened. The extrusion mechanism (2) is connected to the pre-extraction mechanism (1) and is used to perform extrusion molding on the inclined holes of the casting product after the casting product is filled, so as to solve the problem of shrinkage holes in the inclined holes of the casting. By using the pre-extraction mechanism (1) to convert vertical motion into horizontal motion during mold opening, the linkage extrusion mechanism (2) disengages along the axial direction of the inclined hole of the casting.

2. A casting mold with a linkage mechanism for extrusion and pre-extraction as described in claim 1, characterized in that: The pre-extraction mechanism (1) includes a guide post (11) bolted to the upper mold and a guide slide (12) movably connected to the lower mold. The guide post (11) is inserted through the guide slide (12). One end of the guide slide (12) is slidably connected to a push plate (13). A portion of the extrusion mechanism (2) is installed inside the push plate (13) and is fixed by a fixing plate (14) bolted to the end face of the push plate (13).

3. A casting mold with a linkage mechanism for extrusion and pre-extraction as described in claim 2, characterized in that: The bottom of the guide post (11) is inclined, and the inside of the guide slider (12) is provided with a shoe groove that is adapted to the inclined part of the guide post (11).

4. A casting mold with a linkage mechanism for extrusion and pre-extraction as described in claim 2, characterized in that: The connection between the guide block (12) and the push plate (13) is set in an inclined plane through mutually adapted sliding grooves.

5. A casting mold with a linkage mechanism for extrusion and pre-extraction as described in claim 4, characterized in that: The extrusion mechanism (2) includes a hydraulic cylinder (21) installed inside the push plate (13). The driving end of the hydraulic cylinder (21) passes through the fixed plate (14) and is fixedly connected to a connector (22). A connecting sleeve (23) is sleeved through the connector (22). An extrusion pin (24) is movably arranged inside the connecting sleeve (23). The extrusion pin (24) passes through one end of the connecting sleeve (23) and its end is extruded into the interior of the casting body (27).

6. A casting mold with a linkage mechanism for extrusion and pre-extraction as described in claim 5, characterized in that: The connecting sleeve (23) is provided with a plug (25) inside, and the end face of the plug (25) abuts against the connector (22) and the T-shaped end of the extrusion pin (24) located inside the connecting sleeve (23).

7. A casting mold with a linkage mechanism for extrusion and pre-extraction as described in claim 6, characterized in that: The extrusion pin (24) is slidably connected to a sleeve (26) near the top position, and the sleeve (26) is installed in the lower mold.

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