Manual clamp for filter screen of low-pressure casting mold

Abstract

The utility model relates to a low-pressure casting mold filter screen manual clamp which comprises a mold and a filter screen, a mounting groove for mounting the filter screen is formed in the mold, a plurality of filter holes are formed in the filter screen, the filter screen is made of an elastic material, the low-pressure casting mold filter screen manual clamp further comprises a guide rod, a clamping block is arranged at the end of the guide rod, and the clamping block is arranged in the mounting groove in a sliding mode. Mounting needles are arranged at the ends, away from the guide rods, of the clamping blocks, when the mounting needles penetrate through the filter holes, the inner peripheral side walls of the filter holes are in an elastic expansion state, and annular grooves matched with the periphery of the filter screen in a clamped mode are formed in the inner peripheral side walls of the mounting cavities. The filter screen can be installed through simple lifting operation, compared with manual installation, it is not needed to wait for the temperature of the cavity to be lowered, and the installation is not limited by the installation space of the filter screen. The filter screen mounting device has the effect of improving the filter screen mounting efficiency.

Description

Technical Field

[0001] This application relates to the field of filter screen clamping technology, and in particular to a manual clamping device for low-pressure casting mold filter screens. Background Technology

[0002] Low-pressure casting molds use compressed air or inert gas to smoothly fill the mold cavity with molten metal from a crucible under relatively low pressure, allowing it to crystallize and solidify to form the casting. These molds typically contain a filter screen. During the molten metal filling process, the filter screen effectively removes impurities, inclusions, and oxides from the molten metal, preventing these impurities from entering the mold cavity and remaining in the casting. This significantly improves the internal quality of the casting and reduces the likelihood of defects such as porosity and slag inclusions. Simultaneously, the filter screen ensures a smoother and more uniform flow of the molten metal, preventing turbulence or jetting. This helps the molten metal better fill all parts of the mold cavity, especially complex shapes or thin-walled areas, thereby improving the forming quality and dimensional accuracy of the casting.

[0003] Currently, the conventional installation method is manual installation. However, the temperature inside the mold cavity is usually high. To avoid burns, workers usually need to wait for the temperature inside the mold cavity to drop before installing the filter screen. In addition, the installation area of ​​the filter screen is small, making it difficult for workers to operate manually. This results in a significant reduction in the installation efficiency of the filter screen, which is obviously insufficient. Utility Model Content

[0004] To improve the installation efficiency of filter screens, this application provides a manual clamp for low-pressure casting mold filter screens.

[0005] The technical solution provided in this application for a low-pressure casting mold filter screen manual clamp is as follows:

[0006] A manual clamp for a low-pressure casting mold filter screen includes a mold and a filter screen. The mold has an installation groove for installing the filter screen. The filter screen has multiple filter holes and is made of an elastic material. The clamp also includes a guide rod with a clamping block at its end. The clamping block is slidably disposed inside the installation groove. An installation pin is provided at the end of the clamping block away from the guide rod. When the installation pin penetrates the filter hole, the inner peripheral sidewall of the filter hole is in an elastically expanded state. An annular groove is provided on the inner peripheral sidewall of the installation groove to engage with the outer peripheral sidewall of the filter screen.

[0007] By adopting the above technical solution, when installing the filter screen, the worker inserts the installation pin on the clamping block into the filter hole in the center of the filter screen. At this time, the filter screen is fixed on the installation pin under the elastic clamping of the inner circumferential side wall of the filter hole. Then, the worker holds the guide rod to move the clamping block into the installation groove. When the clamping block moves the filter screen to the annular groove, the edge of the filter screen is stuck into the annular groove. After the worker feels the resistance, he lifts the guide rod upward to make the installation pin disengage from the filter hole, and the filter screen installation is completed. With this setting, the worker only needs to insert the filter screen into the installation pin and complete the filter screen installation by a simple lifting operation. Compared with manual installation, there is no need to wait for the cavity temperature to drop, and it is not limited by the installation space of the filter screen, thus improving the installation efficiency of the filter screen.

[0008] Optionally, a limiting block is provided at the end of the clamping block near the guide rod. When the limiting block abuts against the mold surface, the filter screen is engaged inside the annular groove.

[0009] By adopting the above technical solution, the distance between the limiting block and the mold surface continuously decreases as the clamping block moves in the installation groove. When the limiting block abuts against the mold surface, the filter screen is clamped inside the annular groove. The setting of the limiting block restricts the downward movement of the clamping block after the filter screen is installed, thereby ensuring the consistency of the filter screen's installation position each time and avoiding the occurrence of the filter screen's installation position deviation due to human error during the installation process, thus improving the accuracy and consistency of the filter screen installation.

[0010] Optionally, the end of the mounting pin away from the guide rod is tapered.

[0011] By adopting the above technical solution, the tapered end plays a guiding role in the process of installing and removing the installation pin, making it easier for the installation pin to be inserted into or removed from the filter hole, thus making the filter installation process smoother and further improving the filter installation efficiency.

[0012] Optionally, the guide rod can be detachably connected to the clamping block via a connecting assembly.

[0013] By adopting the above technical solution, the connection component enables a detachable connection between the guide rod and the clamping block. When the clamping block or guide rod is damaged, the clamping block or guide rod can be replaced individually without replacing the entire fixture, thus reducing maintenance costs. At the same time, it enables modular production of the guide rod and clamping block, reducing the difficulty of fixture production.

[0014] Optionally, the connecting assembly includes a connecting post disposed at the end of the guide rod, a connecting groove that slides with the connecting post on the clamping block, an mounting block disposed on the outer surface of the connecting post, a sliding groove that slides with the mounting block disposed in the connecting groove, the length direction of the sliding groove being parallel to the axis of the guide rod, and an arc groove communicating with the sliding groove disposed on the inner sidewall of the connecting groove, the center of the arc groove being disposed on the axis of the guide rod.

[0015] By adopting the above technical solution, when connecting the guide rod and the clamping block, the worker aligns the mounting block with the sliding groove, and then inserts the connecting post into the connecting groove. At this time, the mounting block slides in the sliding groove. When the mounting block slides to the point where the sliding groove and the arc groove connect, the worker rotates the guide rod. The rotation of the guide rod drives the mounting block to move in the arc groove. When the mounting block moves to the end of the arc groove away from the sliding groove, the connection between the guide block and the clamping block in the vertical direction is completed. At this time, the worker can drive the clamping block to move in the mounting groove through the guide rod. When disassembling the guide rod or the clamping block, the worker rotates the guide rod to move the mounting block to the point where the arc groove and the sliding groove connect, and then pulls the connecting post out of the connecting groove, separating the guide rod and the clamping block.

[0016] Optionally, the arc groove is provided with a snap-fit ​​groove that engages with the mounting block. The snap-fit ​​groove is located at the end of the arc groove away from the sliding groove. A clamping component is provided in the mounting groove. The clamping component includes a first spring disposed in the mounting groove. One end of the first spring is disposed on the bottom wall of the mounting groove, and the other end is disposed on a clamping plate. One end of the clamping plate is inserted into the arc groove and slides in cooperation with the arc groove. In the natural state of the first spring, the mounting block is clamped in the snap-fit ​​groove by the clamping plate.

[0017] By adopting the above technical solution, when the installation block moves within the arc groove, the worker presses down on the guide rod to compress the first spring. When the installation block moves to the connection point between the sliding groove and the snap-fit ​​groove, the worker releases the pressure on the guide rod. At this time, the first spring resets and pushes the clamping plate upward. The clamping plate pushes the installation block into the snap-fit ​​groove. Under the snap-fit ​​connection between the installation block and the snap-fit ​​groove, the guide rod and the clamping block cannot rotate relative to each other. This reduces the possibility of the worker accidentally rotating the guide rod, causing the installation block to move from the arc groove to the sliding groove, and improves the connection stability between the guide rod and the clamping block, thus ensuring the smooth progress of the filter screen installation process.

[0018] Optionally, the mounting pin slides with the filter hole and is cylindrical. A receiving groove is provided on the outer side wall of the end of the mounting pin. A second spring is provided in the receiving groove. One end of the second spring is provided on the inner side wall of the receiving groove, and the other end is provided with a fixing block. In the natural state of the second spring, the fixing block is embedded in the receiving groove. An ejection component is provided in the guide rod to drive the end of the fixing block to be ejected to the outside of the receiving groove.

[0019] By adopting the above technical solution, after the installation pin is inserted into the filter hole, the ejector component pushes the fixing block out to the outside of the receiving groove. At this time, the top surface of the fixing block abuts against the bottom surface of the filter screen, improving the connection between the filter screen and the installation pin. This effectively reduces the possibility of the filter screen detaching from the installation pin during installation, ensuring the smooth progress of the filter screen installation process. After the filter screen is installed, the ejector component releases the force on the fixing block, and the second spring resets, pulling the fixing block back into the receiving groove. The worker then lifts the guide rod to disengage the installation pin from the filter hole.

[0020] Optionally, the ejection assembly includes an air cylinder embedded inside the guide rod, a piston rod slidably connected inside the air cylinder, a lever provided at the end of the piston rod away from the air cylinder, a lever groove provided on the guide rod that slidably engages with the lever, an air passage communicating with the air outlet end of the air cylinder provided inside the clamping block and the air cylinder, an air tube communicating with the air passage provided inside the mounting pin, an end of the air tube extending into the receiving groove and communicating with an elastic airbag, the surface of the elastic airbag away from the fixing block being fixedly connected to the inner bottom wall of the receiving groove, when the elastic airbag is inflated, the elastic airbag pushes the end of the fixing block to extend out of the receiving groove and abut against the bottom surface of the filter screen.

[0021] By adopting the above technical solution, after the installation needle is inserted into the filter hole, the worker presses down on the lever to move it to the end of the slot near the clamping block. The movement of the lever causes the piston rod to move downward in the air cylinder. The piston rod pushes the air in the air cylinder through the air passage and air pipe to the elastic air bladder. At this time, the elastic air bladder inflates and pushes the fixed block out of the receiving groove, and the second spring is stretched. When it is necessary to remove the installation needle, the worker lifts the lever upward to move it to the end of the slot away from the clamping block. The movement of the lever causes the piston rod to move upward in the air cylinder. The movement of the piston rod increases the air volume of the air cylinder. The gas in the elastic air bladder flows into the air cylinder through the air pipe and air passage. The elastic air bladder contracts. At this time, the second spring resets and causes the fixed block to retract into the receiving groove.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. This application, by setting a guide rod, clamping block, and installation pin, allows the worker to insert the installation pin into the filter hole at the center of the filter screen during installation. At this time, the filter screen is fixed on the installation pin under the elastic clamping of the inner circumferential side wall of the filter hole. Then, the worker holds the guide rod to move the clamping block into the installation groove. When the clamping block moves the filter screen to the annular groove, the edge of the filter screen is stuck into the annular groove. After the worker feels the resistance, he lifts the guide rod upward to disengage the installation pin from the filter hole, and the filter screen installation is completed. This setting only requires the worker to insert the filter screen into the installation pin and complete the filter screen installation through a simple lifting operation. Compared with manual installation, there is no need to wait for the cavity temperature to drop, and it is not limited by the installation space of the filter screen, thus improving the installation efficiency of the filter screen.

[0024] 2. This application sets up a connecting component and a clamping component. The connecting component enables a detachable connection between the guide rod and the clamping block. If the clamping block or the guide rod is damaged, the clamping block or the guide rod can be replaced separately without replacing the entire fixture. The clamping component prevents the guide rod and the clamping block from rotating relative to each other after connection, thereby reducing the possibility that the installation block may move from the arc groove to the sliding groove due to the worker accidentally rotating the guide rod.

[0025] 3. By setting a fixing block, a second spring, and an ejector assembly, after the installation pin is inserted into the filter hole, the ejector assembly pushes the fixing block to move to the bottom surface of the filter screen, thereby improving the connection between the filter screen and the installation pin, effectively reducing the possibility of the filter screen detaching from the installation pin during installation, and ensuring the smooth progress of the filter screen installation process. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application.

[0027] Figure 2 This is a cross-sectional view of the mounting groove in Embodiment 1 of this application.

[0028] Figure 3 This is an exploded view of the guide rod, connecting column, and clamping block in Embodiment 1 of this application.

[0029] Figure 4 This is a cross-sectional view of the connecting groove in Embodiment 1 of this application.

[0030] Figure 5 This is a cross-sectional view of the clamping block and guide rod in Embodiment 2 of this application.

[0031] Figure 6 This is the book Figure 5 Enlarged view of point A in the middle.

[0032] Explanation of reference numerals in the attached drawings: 01, mold; 011, mounting groove; 012, annular groove; 1, guide rod; 101, shifting groove; 2, clamping block; 21, limiting block; 22, air passage; 3, filter screen; 31, filter hole; 4, connecting assembly; 41, connecting column; 42, mounting block; 5, mounting pin; 6, connecting groove; 61, sliding groove; 62, arc groove; 63, snap-fit ​​groove; 7, clamping assembly; 71, first spring; 72, clamping plate; 8, receiving groove; 81, second spring; 82, fixing block; 9, ejection assembly; 91, air cylinder; 92, piston rod; 93, shifting block; 94, air pipe; 95, elastic air bag. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0034] This application discloses a manual clamp for a low-pressure casting mold filter screen.

[0035] Example 1

[0036] Reference Figure 1 and Figure 2 A manual clamp for a low-pressure casting mold filter screen includes a guide rod 1, a clamping block 2, and a filter screen 3. The guide rod 1 and the clamping block 2 are detachably connected by a connecting assembly 4. An installation pin 5 is fixedly connected to the end of the clamping block 2 away from the guide rod 1. The end of the installation pin 5 away from the guide rod 1 is tapered. The filter screen 3 has multiple filter holes 31. The filter screen 3 is made of an elastic material. In this embodiment, the material of the filter screen 3 is high-temperature resistant rubber. When the installation pin 5 penetrates the filter hole 31, the inner peripheral sidewall of the penetrated filter hole 31 is in an elastic expansion state.

[0037] Reference Figure 1 and Figure 2 The mold 01 has an installation groove 011 for installing the filter screen 3. Both the installation groove 011 and the filter screen 3 are frustum-shaped and their diameters gradually decrease from top to bottom along the vertical direction. The maximum diameter of the filter screen 3 is greater than the maximum diameter of the installation groove 011. The inner circumferential side wall of the installation groove 011 has an annular groove 012 that engages with the outer circumferential side of the filter screen 3. When the filter screen 3 is engaged inside the annular groove 012, the filter screen 3 is in a natural state.

[0038] When installing the filter screen 3, the worker connects the guide rod 1 and the clamping block 2 using the connecting assembly 4. Then, the installation pin 5 is inserted into the filter hole 31 at the center of the filter screen 3. Under the elastic clamping of the inner circumferential sidewall of the filter hole 31, the filter screen 3 is fixed to the installation pin 5. The worker then holds the guide rod 1 to move the clamping block 2 into the installation groove 011. At this time, the outer circumference of the filter screen 3 is compressed by the inner circumferential sidewall of the installation groove 011. As the clamping block 2 moves downward, the distance between the filter screen 3 and the annular groove 012 gradually decreases. When the outer circumference of the filter screen 3... When the filter screen 3 is moved to the annular groove 012, under the elastic action of the filter screen 3, the outer periphery of the filter screen 3 is engaged inside the annular groove 012. After the worker feels the resistance, he lifts the guide rod 1 upward to make the installation pin 5 disengage from the filter hole 31, and the installation of the filter screen 3 is completed. With this setting, the worker only needs to insert the filter screen 3 into the installation pin 5 and complete the installation of the filter screen 3 by a simple lifting operation. Compared with manual installation, there is no need to wait for the cavity temperature to drop, and it is not limited by the installation space of the filter screen 3, which improves the installation efficiency of the filter screen 3.

[0039] During the installation and removal of the installation pin 5 from the filter screen 3, the tapered end acts as a guide, making it easier for the installation pin 5 to be inserted into or removed from the filter hole 31, thus making the installation process of the filter screen 3 smoother and further improving the installation efficiency of the filter screen 3.

[0040] Reference Figure 3 and Figure 4 Two limiting blocks 21 are fixedly connected to the end of the clamping block 2 near the guide rod 1. The two limiting blocks 21 are arranged opposite each other. When the limiting blocks 21 abut against the outer surface of the mold 01 near the mounting groove 011, the filter screen 3 is engaged inside the annular groove 012. The setting of the limiting blocks 21 restricts the downward movement of the clamping block 2 after the filter screen 3 is installed, thereby ensuring the consistency of the installation position of the filter screen 3 each time, avoiding the occurrence of the filter screen 3 being offset due to human error during the installation process, and improving the accuracy and consistency of the filter screen 3 installation.

[0041] Reference Figure 3 and Figure 4 The connecting component 4 includes a connecting post 41 fixedly connected to the end of the guide rod 1. The axis of the connecting post 41 is on the same straight line as the axis of the guide rod 1. The clamping block 2 has a connecting groove 6 that slides with the connecting post 41. The outer surface of the connecting post 41 is fixedly connected to the mounting block 42. The connecting groove 6 has a sliding groove 61 that slides with the mounting block 42. The length direction of the sliding groove 61 is parallel to the axis of the guide rod 1. The inner side wall of the connecting groove 6 has an arc groove 62 that communicates with the sliding groove 61. The center of the arc groove 62 is located on the axis of the guide rod 1.

[0042] Reference Figure 3 and Figure 4The end of the arc groove 62 away from the sliding groove 61 is provided with a snap-fit ​​groove 63 that engages with the mounting block 42. A clamping component 7 is provided in the mounting groove 011. The clamping component 7 includes a first spring 71 disposed in the mounting groove 011. One end of the first spring 71 is fixedly connected to the inner bottom wall of the mounting groove 011, and the other end is fixedly connected to a clamping plate 72. The clamping plate 72 includes an integrally formed circular base plate and an arc-shaped insertion plate. The arc-shaped insertion plate is inserted into the arc groove 62 and slides in cooperation with the arc groove 62. In the natural state of the first spring 71, the mounting block 42 is clamped by the clamping plate 72 in the snap-fit ​​groove 63.

[0043] When connecting guide rod 1 and clamping block 2, the worker aligns mounting block 42 with sliding groove 61, then inserts connecting post 41 into connecting groove 6. Mounting block 42 slides within sliding groove 61. When mounting block 42 reaches the junction of sliding groove 61 and arc groove 62, the worker presses down on guide rod 1 to compress first spring 71. Then, the worker rotates guide rod 1 clockwise to move mounting block 42 within arc groove 62. When mounting block 42 reaches the junction of arc groove 62 and locking groove 63, the worker releases pressure on guide rod 1, at which point first spring 71 returns to its original position and pushes the clamping plate. 72 moves upward, and the clamping plate 72 pushes the mounting block 42 to engage in the engagement groove 63. At this time, with the engagement connection between the mounting block 42 and the engagement groove 63, the guide rod 1 and the clamping block 2 cannot rotate relative to each other. At the same time, with the connection of the connecting component 4, the guide rod 1 and the clamping block 2 cannot separate in the vertical direction. The design of the connecting component 4 and the clamping component 7 reduces the possibility that the worker may accidentally rotate the guide rod 1, causing the mounting block 42 to move from the arc groove 62 to the sliding groove 61. This improves the connection stability between the guide rod 1 and the clamping block 2, thereby ensuring the smooth installation of the filter screen 3.

[0044] When the guide rod 1 or clamping block 2 needs to be replaced due to wear, the worker presses down on the guide rod 1, compressing the first spring 71. The mounting block 42 moves from the snap-fit ​​groove 63 to the arc groove 62. Then, the worker rotates the guide rod 1 in the opposite direction, causing the mounting block 42 to slide in the arc groove 62 to the connection between the arc groove 62 and the sliding groove 61. Then, the pressing force on the guide rod 1 is released, and the first spring 71 returns to its original position, pushing the mounting block 42 to slide from the arc groove 62 to the sliding groove 61. The worker then pulls the connecting post 41 out of the connecting groove 6, and the guide rod 1 separates from the clamping block 2.

[0045] The implementation principle of a manual clamp for a low-pressure casting mold filter screen in this application embodiment is as follows: When installing the filter screen 3, the worker connects the guide rod 1 and the clamping block 2 through the connecting component 4, and then inserts the installation pin 5 into the filter hole 31 at the center of the filter screen 3. Under the elastic clamping of the inner peripheral sidewall of the filter hole 31, the filter screen 3 is fixed on the installation pin 5. Then, the worker holds the guide rod 1 to make the clamping block 2 enter the installation groove 011. At this time, the outer peripheral side of the filter screen 3 is compressed by the inner peripheral sidewall of the installation groove 011. As the clamping block 2 moves downward, the distance between the filter screen 3 and the annular groove 012 decreases. As the filter screen 3 gradually decreases in size, when its outer periphery moves to the annular groove 012, the outer periphery of the filter screen 3 is engaged inside the annular groove 012 due to the elasticity of the filter screen 3. After the worker feels the resistance, he lifts the guide rod 1 upward to disengage the installation pin 5 from the filter hole 31, and the installation of the filter screen 3 is completed. With this setup, the worker only needs to insert the filter screen 3 into the installation pin 5 and complete the installation of the filter screen 3 through a simple lifting operation. Compared with manual installation, there is no need to wait for the cavity temperature to drop, and it is not limited by the installation space of the filter screen 3, thus improving the installation efficiency of the filter screen 3.

[0046] Example 2

[0047] Reference Figure 5 and Figure 6 The difference between this embodiment and embodiment 1 is that the mounting pin 5 is cylindrical and slides with the filter hole 31. A receiving groove 8 is provided on the outer side wall of the mounting pin 5 away from the end of the guide rod 1. A second spring 81 is provided in the receiving groove 8. One end of the second spring 81 is fixedly connected to the inner side wall of the receiving groove 8, and the other end is fixedly connected to a fixing block 82. The fixing block 82 is slidably disposed inside the receiving groove 8. In the natural state of the second spring 81, the fixing block 82 is entirely embedded inside the receiving groove 8. An ejection component 9 is provided in the guide rod 1 to drive the end of the fixing block 82 to be ejected to the outside of the receiving groove 8.

[0048] Reference Figure 5 and Figure 6The ejector assembly 9 includes an air cylinder 91 embedded inside the guide rod 1. The length direction of the air cylinder 91 is parallel to the axis of the guide rod 1. A piston rod 92 is slidably connected inside the air cylinder 91. A piston block on the piston rod 92 is tightly fitted against the inner wall of the air cylinder 91. A lever block 93 is fixedly connected to the end of the piston rod 92 away from the air cylinder 91. A lever groove 101 is formed on the outer surface of the guide rod 1 to slide with the lever block 93. An air passage 22 is formed inside the clamping block 2 and the air cylinder 91. When the mounting block 42 is engaged... When the clip is inside the slot 63, the air passage 22 on the clamping block 2 is connected to the air passage 22 of the air cylinder 91. An air pipe 94 connected to the air passage 22 is fixedly installed inside the mounting pin 5. The air outlet end of the air pipe 94 extends into the receiving groove 8 and is connected to an elastic airbag 95. The surface of the elastic airbag 95 away from the fixing block 82 is fixedly connected to the inner bottom wall of the receiving groove 8. When the elastic airbag 95 is inflated, the elastic airbag 95 pushes the end of the fixing block 82 to extend out of the receiving groove 8 and abut against the bottom surface of the filter screen 3.

[0049] Reference Figure 5 and Figure 6 The diameter of the air passage 22 is larger than the diameter of the air outlet of the air cylinder 91 and the diameter of the air pipe 94, thus forming a stepped seal at the connection between the air passage 22 and the air outlet of the air cylinder 91 and the air pipe 94, improving the airtightness of gas transmission.

[0050] The implementation principle of Example 2 is as follows: After the installation pin 5 is inserted into the filter hole 31, the worker presses down on the lever 93 to move it to the end of the lever groove 101 near the clamping block 2. The movement of the lever 93 drives the piston rod 92 to move downward in the air cylinder 91. The piston rod 92 pushes the air in the air cylinder 91 through the air passage 22 and the air pipe 94 to the elastic air bag 95. The elastic air bag 95 inflates and pushes the fixing block 82 out of the receiving groove 8. At this time, the second spring 81 is stretched, and the top surface of the fixing block 82 abuts against the bottom surface of the filter screen 3. This arrangement improves the connection between the filter screen 3 and the installation pin 5, effectively reducing the filter... The possibility of the filter screen 3 detaching from the installation pin 5 during installation is prevented, ensuring the smooth installation of the filter screen 3. When it is necessary to remove the installation pin 5, the worker lifts the lever 93 upwards, moving the lever 93 to the end of the lever groove 101 away from the clamping block 2. The movement of the lever 93 drives the piston rod 92 to move upwards in the air cylinder 91. The movement of the piston rod 92 increases the air volume of the air cylinder 91. The gas in the elastic air bag 95 flows into the air cylinder 91 through the air pipe 94 and the air passage 22. The elastic air bag 95 contracts. At this time, the second spring 81 resets, causing the fixing block 82 to retract into the receiving groove 8. The worker lifts the guide rod 1 to remove the installation pin 5 from the filter hole 31.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A manual clamp for a low-pressure casting mold filter screen, comprising a mold (01) and a filter screen (3), wherein the mold (01) has an installation groove (011) for mounting the filter screen (3), the filter screen (3) has a plurality of filter holes (31), and the filter screen (3) is made of an elastic material, characterized in that, It also includes a guide rod (1), the end of which is provided with a clamping block (2), the clamping block (2) is slidably disposed inside the mounting groove (011), and the end of the clamping block (2) away from the guide rod (1) is provided with a mounting pin (5). When the mounting pin (5) penetrates the filter hole (31), the inner peripheral sidewall of the filter hole (31) is in an elastic expansion state, and the inner peripheral sidewall of the mounting groove (011) is provided with an annular groove (012) that engages with the outer peripheral sidewall of the filter screen (3).

2. The manual clamp for a low-pressure casting mold filter screen according to claim 1, characterized in that, The clamping block (2) is provided with a limiting block (21) at the end near the guide rod (1). When the limiting block (21) abuts against the surface of the mold (01), the filter screen (3) is engaged inside the annular groove (012).

3. A manual clamp for a low-pressure casting mold filter screen according to claim 1, characterized in that, The end of the mounting pin (5) away from the guide rod (1) is tapered.

4. A manual clamp for a low-pressure casting mold filter screen according to claim 1, characterized in that, The guide rod (1) is detachably connected to the clamp (2) via the connecting assembly (4).

5. A manual clamp for a low-pressure casting mold filter screen according to claim 4, characterized in that, The connecting assembly (4) includes a connecting post (41) disposed at the end of the guide rod (1), a connecting groove (6) that slides with the connecting post (41) is provided on the clamping block (2), an mounting block (42) is provided on the outer surface of the connecting post (41), a sliding groove (61) that slides with the mounting block (42) is provided in the connecting groove (6), the length direction of the sliding groove (61) is parallel to the axis direction of the guide rod (1), an arc groove (62) that communicates with the sliding groove (61) is provided on the inner side wall of the connecting groove (6), and the center of the arc groove (62) is located on the axis of the guide rod (1).

6. A manual clamp for a low-pressure casting mold filter screen according to claim 5, characterized in that, The arc groove (62) is provided with a snap-fit ​​groove (63) that engages with the mounting block (42). The snap-fit ​​groove (63) is located at the end of the arc groove (62) away from the sliding groove (61). A clamping component (7) is provided in the mounting groove (011). The clamping component (7) includes a first spring (71) provided in the mounting groove (011). One end of the first spring (71) is provided on the bottom wall of the mounting groove (011), and the other end is provided with a clamping plate (72). One end of the clamping plate (72) is inserted into the arc groove (62) and slides in cooperation with the arc groove (62). In the natural state of the first spring (71), the mounting block (42) is clamped in the snap-fit ​​groove (63) by the clamping plate (72).

7. A manual clamp for a low-pressure casting mold filter screen according to claim 1, characterized in that, The mounting pin (5) is slidably engaged with the filter hole (31) and is cylindrical. A receiving groove (8) is provided on the outer side wall of the end of the mounting pin (5). A second spring (81) is provided in the receiving groove (8). One end of the second spring (81) is provided on the inner side wall of the receiving groove (8), and the other end is provided with a fixing block (82). In the natural state of the second spring (81), the fixing block (82) is embedded in the receiving groove (8). An ejection assembly (9) is provided in the guide rod (1) to drive the end of the fixing block (82) to be ejected to the outside of the receiving groove (8).

8. A manual clamp for a low-pressure casting mold filter screen according to claim 7, characterized in that, The ejector assembly (9) includes an air cylinder (91) embedded inside the guide rod (1), a piston rod (92) slidably connected inside the air cylinder (91), a lever (93) provided at the end of the piston rod (92) away from the air cylinder (91), a lever groove (101) provided on the guide rod (1) for sliding engagement with the lever (93), an air passage (22) communicating with the air outlet end of the air cylinder (91) provided inside the clamping block (2), and the mounting pin (5). An air tube (94) communicating with the air passage (22) is provided inside. The end of the air tube (94) extends into the receiving groove (8) and is connected to an elastic airbag (95). The surface of the elastic airbag (95) away from the fixed block (82) is fixedly connected to the inner bottom wall of the receiving groove (8). When the elastic airbag (95) is inflated, the elastic airbag (95) pushes the end of the fixed block (82) to extend out of the receiving groove (8) and abut against the bottom surface of the filter screen (3).

Images