Partial extrusion device for a mould

Abstract

This utility model provides a partial extrusion device for a mold, relating to the field of partial extrusion technology for molds. It includes a worktable and an extrusion punch. A control terminal is fixedly mounted at one end of the top surface of the worktable. A cross groove is formed at the center of the top surface of the worktable. A circular groove is formed through the bottom inner wall of the cross groove. A die-casting mold is movably fitted inside the cross groove. Mounting blocks are fixedly mounted on both sides of the die-casting mold. Limiting components are provided on the top surfaces of the two mounting blocks. A die-casting motor is fixedly mounted on the top surface of the U-shaped plate. Compared with the prior art, this utility model has the following advantages: by pulling two pull rings, multiple limiting rods are driven, causing the multiple limiting rods to move out from the inside of multiple limiting holes, thereby releasing the limitation on the die-casting mold and avoiding the extremely inconvenient, time-consuming, and laborious operation when changing the die-casting mold, which would affect the normal work process of the workers.

Description

Technical Field

[0001] This utility model is a local extrusion device for molds, belonging to the field of local extrusion of molds. Background Technology

[0002] In existing technologies, local extrusion technology is commonly used in the production of aluminum alloy die castings. By designing auxiliary pressure-boosting and feeding structures in areas with significant differences in wall thickness, defects such as shrinkage cavities and porosity can be effectively solved, thereby improving the quality and production efficiency of die castings.

[0003] Most existing die casting molds use bolts to fix the die casting molds to the die casting machine. When different die casting molds are needed, different die casting molds need to be replaced. However, existing die casting molds are fixed with multiple bolts, making it extremely inconvenient, time-consuming, and labor-intensive to replace them, which indirectly reduces the efficiency of mold production. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a local extrusion device for a mold to solve the problems mentioned in the background art. This utility model drives multiple limiting rods by pulling two pull rings, so that the multiple limiting rods move out of the inside of multiple limiting holes, thereby releasing the limitation on the die-casting mold and avoiding the extremely inconvenient, time-consuming and laborious operation when changing the die-casting mold, which would affect the normal work process of the workers.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a partial extrusion device for a mold, comprising a worktable and an extrusion punch. Multiple support legs are fixedly mounted on the bottom surface of the worktable. A control terminal is fixedly mounted at one end of the top surface of the worktable. A cross groove is formed at the center of the top surface of the worktable. A circular groove is formed through the bottom inner wall of the cross groove. A die-casting mold is movably fitted inside the cross groove. Mounting blocks are fixedly mounted on both sides of the die-casting mold. Two mounting blocks are movably fitted inside the cross groove. Limiting components are provided on the top surfaces of the two mounting blocks. The top of the worktable... A U-shaped plate is fixedly installed on the surface. A die-casting motor is fixedly installed on the top surface of the U-shaped plate. Vertical grooves are opened through both sides of the U-shaped plate. Vertical rods are fixedly installed between the upper and lower inner walls of the two vertical grooves. The output end of the die-casting motor movably passes through the top surface of the U-shaped plate and is fixedly installed with a movable plate. The two ends of the two movable plates are correspondingly and movably fitted onto the outer wall surfaces of the two vertical rods. A fixing component is provided on the bottom surface of the movable plate. The limiting component includes two circular grooves and multiple limiting holes. The two circular grooves are correspondingly opened through the top surfaces of the two mounting blocks, and the multiple limiting holes are correspondingly opened on the four inner wall surfaces of the cross groove.

[0006] Furthermore, two first anti-mistake grooves are formed on the inner wall surfaces of the two circular grooves, hollow columns are movably inserted into the interior of the two circular grooves, and two first anti-mistake plates are fixedly installed on the outer wall surfaces of the two hollow columns. Multiple first anti-mistake plates are correspondingly inserted into the interior of multiple first anti-mistake grooves.

[0007] Furthermore, two horizontal plates are fixedly installed on the inner wall surfaces of the two hollow columns, and two sliding plates are movably fitted onto the surfaces of the multiple horizontal plates. Each pair of sliding plates is fixedly fitted with a limiting rod, and the multiple limiting rods movably penetrate the inner wall surfaces of the two hollow columns and are correspondingly movably inserted into the interior of the multiple limiting holes.

[0008] Furthermore, each of the multiple limiting rods has a hinge plate hinged to its outer wall surface. Each pair of hinge plates has a disc hinged to one end. The outer wall surfaces of the two discs are movably fitted to the inner wall surfaces of the two hollow columns. Springs are fixedly installed between the top surfaces of the two discs and the top inner wall surfaces of the two hollow columns. Pull rods are fixedly installed at the center of the top surfaces of the two discs. The two pull rods are located inside the two springs and movably fitted to the top inner wall surfaces of the two hollow columns. Pull rings are fixedly installed on the top surfaces of the two pull rods.

[0009] Furthermore, the fixing component includes a movable disc, which is fixedly installed at the center of the bottom surface of the movable plate. A limiting groove is formed through the outer wall surface of the movable plate. Two second anti-mistake plates are fixedly installed on the outer wall surface of the movable disc. The extrusion punch is movably fitted and sleeved on the outside of the movable disc. Two second anti-mistake grooves are formed on the inner wall surface of the extrusion punch. The two second anti-mistake plates are correspondingly located inside the two second anti-mistake grooves. Two rectangular grooves are formed through the outer wall surface of the extrusion punch. The two rectangular grooves and the limiting groove are connected through each other.

[0010] Furthermore, multiple baffles are fixedly installed on the top surface of the movable plate. The multiple baffles are in pairs, and each pair of baffles is connected to a threaded rod by a bearing. A motor is fixedly installed on one side surface of each of the two baffles, and the output ends of the two motors are correspondingly movably inserted through the two baffles and fixedly installed on one end surface of the two threaded rods.

[0011] Furthermore, two cross-shaped through slots are symmetrically opened on the top surface of the movable plate. The two cross-shaped through slots are located between each set of baffles. A cross plate is movably fitted inside each of the two cross-shaped through slots. The two cross plates are threadedly connected to the surfaces of two threaded rods. A limiting plate is fixedly installed at the bottom of one side surface of each of the two cross plates. The two limiting plates movably pass through the two rectangular slots and are movably inserted inside the limiting slots.

[0012] The beneficial effects of this utility model are:

[0013] 1. In this utility model, firstly, pull the pull ring upwards. The movement of the pull ring drives the pull rod to move, and the movement of the pull rod drives the disc to move. The movement of the disc compresses the spring. At the same time, the movement of the disc drives the two hinge plates to move. The movement of the two hinge plates drives the two limit rods to move closer to each other. The movement of the two limit rods causes them to move out of the two limit holes. When the two limit rods are completely inside the hollow column, the hollow column can be taken out. The other hollow column can be taken out using the same operation method, thereby releasing the limitation on the two mounting blocks. At this time, the die-casting mold can be taken out from the inside of the cross groove and a new die-casting mold can be replaced.

[0014] At this point, the first anti-mistake plates on the outer wall surface of the two hollow columns are aligned with the first anti-mistake grooves and inserted. When the bottom surface of the two hollow columns is in contact with the bottom surface of the cross groove, the two pull rings can be released. The rebound force of the two springs is used to re-insert the multiple limit rods into the corresponding multiple limit holes, thereby restricting the two mounting blocks inside the cross groove, thus completing the purpose of replacing the die-casting mold.

[0015] With the cooperation of the above structure, pulling the two pull rings drives multiple limit rods, causing the multiple limit rods to move out of the inside of multiple limit holes, thereby releasing the limit on the die-casting mold and avoiding the extremely inconvenient, time-consuming and laborious operation when changing the die-casting mold, which would affect the normal work process of the workers.

[0016] 2. In this utility model, two motors drive two threaded rods to rotate, which in turn drives two cross plates to move in opposite directions inside two cross slots. The movement of the two cross plates drives two limiting plates to move, which in turn moves them out of the limiting slots and the two rectangular slots, thereby releasing the restriction on the extrusion punch. Then, the two second anti-foolproof grooves on the inner wall surface of the new extrusion punch are aligned with the two second anti-foolproof plates and inserted. By controlling the two motors to run in reverse, the two limiting plates pass through the interior of the two rectangular slots and are inserted into the interior of the limiting slots, thus completing the purpose of replacing the extrusion punch.

[0017] With the combination of the above structures, the two limiting plates, along with the two rectangular slots and the limiting slot, limit the extrusion punch to the outer wall surface of the movable disc. By running the two motors, the limitation on the extrusion punch can be quickly released, making it convenient to replace different models of extrusion punches. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the structure of a partial extrusion device for a mold according to the present invention;

[0020] Figure 2 This is a schematic diagram from the right side of a partial extrusion device for a mold according to the present invention;

[0021] Figure 3 This is a schematic diagram of a die-casting mold in a partial extrusion device for a mold according to the present invention;

[0022] Figure 4 This is a schematic diagram of the cross-section of the limiting component in the partial extrusion device of a mold according to the present invention;

[0023] Figure 5 This is a schematic cross-sectional view of a partial extrusion device for a mold according to the present invention;

[0024] Figure 6 This is a schematic diagram of the fixing component in a partial extrusion device for a mold according to the present invention;

[0025] Figure 7 This utility model relates to a partial extrusion device for a mold. Figure 6 A schematic diagram of the split structure;

[0026] Figure 8 This utility model relates to a partial extrusion device for a mold. Figure 5 A schematic diagram of A in the diagram.

[0027] In the diagram: 1-Workbench, 2-Support leg, 3-Control terminal, 4-Cross groove, 401-Circular groove, 5-Die casting mold, 501-Mounting block, 6-Limit assembly, 601-Circular groove, 602-Limit hole, 603-First anti-foolproof groove, 604-Hollow column, 605-First anti-foolproof plate, 606-Horizontal plate, 607-Slide plate, 608-Limit rod, 609-Hinge plate, 610-Disc, 611-Spring, 612-Pull 613-Pull ring, 7-U-shaped plate, 8-Die-casting motor, 801-Vertical groove, 802-Vertical rod, 803-Moving plate, 9-Fixed component, 901-Moving disc, 902-Second anti-fool plate, 903-Limit groove, 904-Rectangular groove, 905-Second anti-fool groove, 906-Baffle, 907-Threaded rod, 908-Motor, 909-Cross through groove, 910-Cross plate, 911-Limit plate, 10-Extrusion punch. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0029] Please see Figure 1-8 This utility model provides a technical solution: a partial extrusion device for a mold, comprising a worktable 1 and an extrusion punch 10. Multiple support legs 2 are fixedly installed on the bottom surface of the worktable 1. A control terminal 3 is fixedly installed at one end of the top surface of the worktable 1. A cross groove 4 is formed in the center of the top surface of the worktable 1. A circular groove 401 is formed through the bottom inner wall of the cross groove 4. A die-casting mold 5 is movably fitted inside the cross groove 4. Mounting blocks 501 are fixedly installed on both sides of the die-casting mold 5. Both mounting blocks 501 are movably fitted inside the cross groove 4. Limiting components 6 are provided on the top surfaces of the two mounting blocks 501. A U-shaped plate 7 is fixedly installed on the top surface of the worktable 1. A die-casting motor 8 is fixedly installed on the top surface of the U-shaped plate 7. Vertical grooves 801 are opened through both sides of the U-shaped plate 7. Vertical rods 802 are fixedly installed between the inner walls of the upper and lower ends of the two vertical grooves 801. The output end of the die-casting motor 8 is movably opened through the top surface of the U-shaped plate 7 and a movable plate 803 is fixedly installed thereon. The two ends of the two movable plates 803 are correspondingly and movably fitted onto the outer wall surfaces of the two vertical rods 802. A fixing component 9 is provided on the bottom surface of the movable plate 803. The limiting component 6 includes two circular grooves 601 and multiple limiting holes 602. The two circular grooves 601 are correspondingly opened through the top surfaces of the two mounting blocks 501, and the multiple limiting holes 602 are correspondingly opened on the four inner wall surfaces of the cross groove 4.

[0030] Specifically: the control terminal 3 plays the role of controlling the operation of all electrical components in the entire device. The two ends of the movable plate 803 are correspondingly fitted and sleeved on the surfaces of the two vertical rods 802 to ensure that the die-casting motor 8 can drive the movable plate 803 to move stably when it is running. The bottom of the die-casting mold 5 has a hollow column that penetrates the interior of the circular groove 401.

[0031] Please see Figure 3 Specific implementation method: Two first anti-mistake grooves 603 are opened on the inner wall surface of the two circular grooves 601. Hollow columns 604 are movably inserted into the interior of the two circular grooves 601. Two first anti-mistake plates 605 are fixedly installed on the outer wall surface of the two hollow columns 604. Multiple first anti-mistake plates 605 are correspondingly inserted into the interior of multiple first anti-mistake grooves 603.

[0032] Specifically: The first anti-misalignment plate 605 can be inserted into the first anti-misalignment groove 603 to ensure that after each installation of the hollow column 604, the two limit rods 608 are on the same horizontal line as the two limit holes 602.

[0033] Please see Figure 4 and 8 Specific implementation method: Two horizontal plates 606 are fixedly installed on the inner wall surfaces of the two hollow columns 604. Two sliding plates 607 are movably fitted onto the surfaces of the multiple horizontal plates 606. Limiting rods 608 are fixedly installed between each pair of sliding plates 607. The multiple limiting rods 608 movably penetrate the inner wall surfaces of the two hollow columns 604 and are movably inserted into the interior of the multiple limiting holes 602.

[0034] Specifically: Multiple limit rods 608, together with multiple limit holes 602, firmly restrict the two mounting blocks 501 inside the cross groove 4.

[0035] Please see Figure 4 Specific implementation method: The outer wall surfaces of multiple limiting rods 608 are all hinged with hinge plates 609. Each pair of hinge plates 609 is hinged to one end with a disc 610. The outer wall surfaces of the two discs 610 are movably attached to the inner wall surfaces of the two hollow columns 604. Springs 611 are fixedly installed between the top surfaces of the two discs 610 and the top inner wall surfaces of the two hollow columns 604. Pull rods 612 are fixedly installed at the center of the top surfaces of the two discs 610. The two pull rods 612 are located inside the two springs 611. The two pull rods 612 are movably attached to the top inner wall surfaces of the two hollow columns 604. Pull rings 613 are fixedly installed on the top surfaces of the two pull rods 612.

[0036] Specifically: multiple hinge plates 609 drive the two limit rods 608 to move in opposite directions, spring 611 restricts the position of disk 610 inside hollow column 604, and pull ring 613 drives pull rod 612 and disk 610 to move.

[0037] Please see Figure 7 Specific implementation method: The fixed component 9 includes a movable disk 901, which is fixedly installed at the center of the bottom surface of the movable plate 803. A limiting groove 903 is opened through the outer wall surface of the movable plate 803. Two second anti-misalignment plates 902 are fixedly installed on the outer wall surface of the movable disk 901. The extrusion punch 10 is movably fitted and sleeved on the outside of the movable disk 901. Two second anti-misalignment grooves 905 are opened on the inner wall surface of the extrusion punch 10. The two second anti-misalignment plates 902 are located inside the two second anti-misalignment grooves 905 respectively. Two rectangular grooves 904 are opened through the outer wall surface of the extrusion punch 10. The two rectangular grooves 904 and the limiting groove 903 are connected through each other.

[0038] Specifically: Two second anti-misalignment plates 902 can be inserted into the two second anti-misalignment slots 905 to ensure that the two rectangular slots 904 are always connected to the limiting slots 903.

[0039] Please see Figure 6 Specific implementation method: Multiple baffles 906 are fixedly installed on the top surface of the movable plate 803. The multiple baffles 906 are in pairs. Each pair of baffles 906 is connected to a threaded rod 907 through a bearing. A motor 908 is fixedly installed on one side surface of each of the two baffles 906. The output ends of the two motors 908 are correspondingly movably inserted through the two baffles 906 and correspondingly fixedly installed on one end surface of the two threaded rods 907.

[0040] Specifically: Both motors 908 are forward and reverse rotating motors 908, which can drive the two threaded rods 907 to rotate in both directions during operation.

[0041] Please see Figure 6 Specific implementation method: Two cross slots 909 are symmetrically opened through the top surface of the movable plate 803. The two cross slots 909 are located between each set of baffles 906. A cross plate 910 is movably fitted inside the two cross slots 909. The two cross plates 910 are threadedly connected to the surfaces of two threaded rods 907. A limiting plate 911 is fixedly installed at the bottom of one side surface of the two cross plates 910. The two limiting plates 911 movably pass through the two rectangular slots 904 and are movably inserted inside the limiting slots 903.

[0042] Specifically: the two threaded rods 907 drive the two cross plates 910 to move inside the two cross slots 909, and the two cross plates 910 drive the two limiting plates 911 to pass through the two rectangular slots 904 and be inserted inside the limiting slots 903.

[0043] Working principle:

[0044] When using the local extrusion device of this mold, when it is necessary to replace the die-casting mold 5, first pull the pull ring 613 upward. The movement of the pull ring 613 drives the pull rod 612 to move. The movement of the pull rod 612 drives the disc 610 to move. The movement of the disc 610 will squeeze the spring 611, thereby compressing the spring 611. At the same time, the movement of the disc 610 drives the two hinge plates 609 to move. The movement of the two hinge plates 609 drives the two limit rods 608 to move towards each other. The movement of the two limit rods 608 causes them to move out of the two limit holes 602. When the two limit rods 608 are completely inside the hollow column 604, the hollow column 604 can be taken out. The other hollow column 604 can be taken out using the same operation method, thereby releasing the limitation on the two mounting blocks 501. At this time, the die-casting mold 5 can be taken out from the inside of the cross groove 4 and a new die-casting mold 5 can be replaced.

[0045] At this time, the multiple first anti-misalignment plates 605 on the outer wall surface of the two hollow columns 604 are aligned with the multiple first anti-misalignment grooves 603 and inserted. When the bottom surface of the two hollow columns 604 is in contact with the bottom surface of the cross groove 4, the two pull rings 613 can be released. The rebound force of the two springs 611 is used to make the multiple limit rods 608 re-inserted into the corresponding multiple limit holes 602, thereby restricting the two mounting blocks 501 inside the cross groove 4, thus completing the purpose of replacing the die-casting mold 5.

[0046] With the cooperation of the above structure, by pulling the two pull rings 613, multiple limit rods 608 are driven, so that the multiple limit rods 608 are moved out from the inside of multiple limit holes 602, thereby releasing the limit on the die-casting mold 5, avoiding the extremely inconvenient, time-consuming and laborious operation when changing the die-casting mold 5, which would affect the normal work process of the workers.

[0047] When it is necessary to replace the extrusion punch 10, firstly, the two motors 908 are operated by the control terminal 3. The operation of the two motors 908 drives the two threaded rods 907 to rotate. The rotation of the two threaded rods 907 drives the two cross plates 910 to move in opposite directions inside the two cross through slots 909. The movement of the two cross plates 910 drives the two limiting plates 911 to move. The movement of the two limiting plates 911 causes them to move out of the limiting slots 903 and the two rectangular slots 904, thereby releasing the limitation on the extrusion punch 10. Then, the two second anti-fooling slots 905 on the inner wall surface of the new extrusion punch 10 are aligned with the two second anti-fooling plates 902 and inserted. The two motors 908 are operated in reverse by the control terminal 3, so that the two limiting plates 911 pass through the inside of the two rectangular slots 904 and are inserted into the inside of the limiting slots 903, thereby completing the purpose of replacing the extrusion punch 10.

[0048] With the cooperation of the above structure, the two limiting plates 911, together with the two rectangular grooves 904 and the limiting groove 903, limit the extrusion punch 10 on the outer wall surface of the movable plate 901. By running the two motors 908, the limitation on the extrusion punch 10 can be quickly released, making it convenient to replace different models of extrusion punch 10.

[0049] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A partial extrusion device for a mold, comprising, The workbench (1) and extrusion punch (10) are characterized in that: a plurality of support legs (2) are fixedly installed on the bottom surface of the workbench (1); a control terminal (3) is fixedly installed at one end of the top surface of the workbench (1); a cross groove (4) is opened in the center of the top surface of the workbench (1); a circular groove (401) is opened through the bottom inner wall surface of the cross groove (4); a die-casting mold (5) is movably fitted inside the cross groove (4); mounting blocks (501) are fixedly installed on both sides of the die-casting mold (5); both mounting blocks (501) are movably fitted inside the cross groove (4); a limiting component (6) is provided on the top surface of the two mounting blocks (501); a U-shaped plate (7) is fixedly installed on the top surface of the workbench (1); and the top surface of the U-shaped plate (7) is fixedly fitted. A die-casting motor (8) is installed. Vertical grooves (801) are opened through both sides of the U-shaped plate (7). Vertical rods (802) are fixedly installed between the upper and lower inner walls of the two vertical grooves (801). The output end of the die-casting motor (8) is movably opened through the top surface of the U-shaped plate (7) and a movable plate (803) is fixedly installed. The two ends of the two movable plates (803) are correspondingly movably fitted and sleeved on the outer wall surface of the two vertical rods (802). A fixing component (9) is provided on the bottom surface of the movable plate (803). The limiting component (6) includes two circular grooves (601) and multiple limiting holes (602). The two circular grooves (601) are correspondingly opened through the top surface of the two mounting blocks (501). The multiple limiting holes (602) are correspondingly opened on the four inner wall surfaces of the cross groove (4).

2. A partial extrusion device for a mould as claimed in claim 1, characterised in that: Two first anti-mistake grooves (603) are formed on the inner wall surface of the two circular grooves (601). Hollow columns (604) are movably inserted into the interior of the two circular grooves (601). Two first anti-mistake plates (605) are fixedly installed on the outer wall surface of the two hollow columns (604). Multiple first anti-mistake plates (605) are correspondingly inserted into the interior of multiple first anti-mistake grooves (603).

3. A partial extrusion device for a mould as claimed in claim 2, characterised in that: Two horizontal plates (606) are fixedly installed on the inner wall surfaces of the two hollow columns (604). Two sliding plates (607) are movably fitted onto the surfaces of the multiple horizontal plates (606). Limiting rods (608) are fixedly installed between each pair of the multiple sliding plates (607). The multiple limiting rods (608) movably penetrate the inner wall surfaces of the two hollow columns (604) and are movably inserted into the interior of the multiple limiting holes (602).

4. A partial extrusion device for a mold according to claim 3, characterized in that: The outer wall surfaces of the plurality of limiting rods (608) are all hinged with hinge plates (609). Each pair of hinge plates (609) is hinged with a disc (610) at one end. The outer wall surfaces of the two discs (610) are movably attached to the inner wall surfaces of the two hollow columns (604). Springs (611) are fixedly installed between the top surfaces of the two discs (610) and the top inner wall surfaces of the two hollow columns (604). Pull rods (612) are fixedly installed at the center of the top surfaces of the two discs (610). The two pull rods (612) are located inside the two springs (611). The two pull rods (612) are movably attached to the top inner wall surfaces of the two hollow columns (604). Pull rings (613) are fixedly installed on the top surfaces of the two pull rods (612).

5. A partial extrusion device for a mold as defined in claim 1, wherein: The fixing component (9) includes a movable plate (901), which is fixedly installed at the center of the bottom surface of the movable plate (803). A limiting groove (903) is opened through the outer wall surface of the movable plate (803). Two second anti-misalignment plates (902) are fixedly installed on the outer wall surface of the movable plate (901). The extrusion punch (10) is movably fitted and sleeved on the outside of the movable plate (901). Two second anti-misalignment grooves (905) are opened on the inner wall surface of the extrusion punch (10). The two second anti-misalignment plates (902) are located inside the two second anti-misalignment grooves (905). Two rectangular grooves (904) are opened through the outer wall surface of the extrusion punch (10). The two rectangular grooves (904) and the limiting groove (903) are connected through each other.

6. A partial extrusion device for a mold as defined in claim 1, wherein: Multiple baffles (906) are fixedly installed on the top surface of the movable plate (803). The multiple baffles (906) are in pairs. Each pair of baffles (906) is connected to a threaded rod (907) by a bearing. A motor (908) is fixedly installed on one side surface of each of the two baffles (906). The output ends of the two motors (908) are respectively movably inserted through the two baffles (906) and fixedly installed on one end surface of the two threaded rods (907).

7. A partial extrusion device for a mold as defined in claim 1, wherein: The top surface of the movable plate (803) has two symmetrical through-slots (909). The two through-slots (909) are located between each set of baffles (906). A cross plate (910) is movably fitted inside each of the two through-slots (909). The two cross plates (910) are threadedly connected to the surfaces of two threaded rods (907). A limiting plate (911) is fixedly installed at the bottom of one side surface of each of the two cross plates (910). The two limiting plates (911) movably pass through the two rectangular slots (904) and are movably inserted inside the limiting slots (903).

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