A structure for vacuumizing and exhausting a mold cavity

Abstract

The utility model relates to the technical field of mould cavity exhaust, specifically relates to a mould cavity vacuumizing exhaust structure, including mounting bracket and set in the movable seat of mounting bracket top, install the translation unit for driving movable seat translation on mounting bracket, the top of movable seat is equipped with first exhaust block, the top of first exhaust block is equipped with second exhaust block, the below of first exhaust block is equipped with first fixed base, the top of second exhaust block is equipped with second fixed base, ensure that the first exhaust block and second exhaust block can be close together when the upper die and lower die are closed, make the contact pressure of first exhaust block and second exhaust block be in the preset range to guarantee that the first exhaust block and second exhaust block sealing surface even pressure tightly of all areas, greatly improved the reliability of vacuum sealing.

Description

Technical Field

[0001] This utility model relates to the field of mold cavity venting technology, and in particular to a mold cavity vacuum venting structure. Background Technology

[0002] Die casting is a metal casting process widely used in the production of automotive parts. During die casting, the venting of gas from the mold cavity is essential, as it affects the internal quality of the die-cast part. Current technology involves a reliable venting interface structure between the mold and the vacuum equipment. A common existing structure is a fixed venting block, where venting blocks with wavy (or labyrinthine) venting channels are rigidly fixed to the upper and lower molds with bolts. When the molds are closed, the closing force of the machine tool presses the precise mating surfaces of the two venting blocks together, forming a seal and connecting the venting channels. When the molds are opened, the two venting blocks separate with the mold.

[0003] However, it is worth considering that in a rigid fixing scheme, the final pressing state of the two vent blocks depends entirely on the mold closing accuracy of the upper and lower molds. If there are slight errors in the mold processing or in the mold installation on the die-casting machine, it will directly lead to uneven pressure on the mating surfaces of the two vent blocks. Areas with low contact pressure will leak, destroying the vacuum, while areas with excessive pressure will accelerate wear and shorten the life of the vent blocks.

[0004] Therefore, in order to solve the above problems, a more suitable facility that meets the needs of users is needed. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a mold cavity vacuum exhaust structure to solve the problems of leakage and vacuum destruction in areas with low contact pressure, and accelerated wear in areas with excessive pressure.

[0006] To achieve the above objectives, this utility model provides a mold cavity vacuum venting structure, including a mounting frame and a movable seat disposed above the mounting frame. A translation unit for driving the movable seat to move is mounted on the mounting frame. A first venting block is disposed above the movable seat, a second venting block is disposed above the first venting block, a first fixed seat is disposed below the first venting block, and a second fixed seat is disposed above the second venting block.

[0007] The first fixed base and the second fixed base are respectively equipped with disassembly and assembly parts, which are used to install the second exhaust block and the first fixed base on the second fixed base and the first fixed base respectively;

[0008] The movable seat is equipped with a guide that cooperates with the second fixed seat, the second exhaust block is equipped with a plug-in component that cooperates with the mold, and the movable seat is equipped with a spacing adjustment structure that cooperates with the first fixed seat.

[0009] Preferably, the guide includes several guide plates fixedly installed on the movable seat, and a bracket is slidably sleeved on the outside of the guide plate, and the bracket is fixedly connected to the second fixed seat.

[0010] Preferably, the first exhaust block is fixedly connected with several protrusions, the second exhaust block is provided with an exhaust chamber that cooperates with the several protrusions, one end of the second exhaust block is provided with an air extraction hole that cooperates with the exhaust chamber, and the other end of the exhaust chamber is provided with an exhaust pipe that communicates with the exhaust chamber.

[0011] Preferably, the connector includes a support portion fixedly installed on both sides of the second exhaust block, and a positioning post is passed through the support portion for fixed connection with the mold.

[0012] Preferably, the disassembly component includes slide rails fixedly installed on the first fixed seat and the second fixed seat respectively. A plurality of sliders are fixedly connected to the first vent block and the second vent block respectively, and the sliders are slidably installed on the corresponding slide rails. A plurality of insert rods are passed through the first fixed seat and the second fixed seat respectively. A plurality of slots that cooperate with the insert rods are opened on the first vent block and the second vent block respectively. One end of the insert rod is located in the corresponding slot, and the other end of the insert rod is fixedly connected to the fixed plate. A tension spring is sleeved on the outside of the insert rod. One end of the tension spring is fixedly connected to the fixed plate, and the other end of the tension spring is fixedly connected to the corresponding first fixed seat or the second fixed seat.

[0013] Preferably, the spacing adjustment structure includes a first lead screw fixedly installed on a first fixed base, a threaded sleeve sleeved on the outside of the first lead screw, and the threaded sleeve and the movable base being rotatably connected. A plurality of first guide posts are fixedly connected on the first fixed base, and guide sleeves are slidably sleeved on the outside of the first guide posts, and the guide sleeves and the movable base are fixedly connected.

[0014] Preferably, the translation unit includes a second guide post fixedly mounted on a mounting frame, a second lead screw rotatably connected to the mounting frame, the second guide post and the second lead screw respectively passing through a movable seat, and the connection between the second lead screw and the movable seat is a threaded connection, a friction plate is fixedly connected to the end of the threaded sleeve, a hydraulic telescopic rod is fixedly connected to the mounting frame, a friction frame is fixedly connected to the output end of the hydraulic telescopic rod, and the friction frame is in contact with the second lead screw and the friction plate respectively.

[0015] The beneficial effects of this utility model are as follows: The operator slides the second vent block onto the upper mold using the connector, and fixes the mounting bracket onto the lower mold. The distance between the first fixed seat and the movable seat is adjusted by the distance adjustment structure, thereby adjusting the initial distance between the first vent block and the second vent block. The movable seat is driven to translate relative to the mounting bracket by the translation unit, so that the first vent block and the second vent block abut against the upper mold and the lower mold respectively, ensuring that the first vent block and the second vent block are connected to the venting channel on the die-casting mold cavity. When the upper mold moves vertically relative to the lower mold, the upper mold drives the second vent block and the second fixed seat to slide relative to the movable seat and the first vent block. By adjusting the initial distance between the first vent block and the second vent block, it is ensured that when the upper mold and the lower mold are closed, the first vent block and the second vent block can be tightly pressed together, so that the contact pressure of the first vent block and the second vent block is within the preset range, thereby ensuring that the sealing surfaces of the first vent block and the second vent block are uniformly pressed over the entire area, greatly improving the reliability of the vacuum seal. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the second exhaust block in an embodiment of the present invention;

[0019] Figure 3 This is a structural schematic diagram of the disassembly and assembly parts according to an embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the mounting bracket in an embodiment of the present invention.

[0021] The diagram is marked as follows:

[0022] 1. Mounting bracket; 2. Movable seat; 3. First exhaust block; 4. Second exhaust block; 5. First fixed seat; 6. Second fixed seat; 7. Bracket; 8. Guide plate; 9. Protruding strip; 10. Exhaust chamber; 11. Air extraction hole; 12. Exhaust pipe; 13. Slide rail; 14. Slider; 15. Insert rod; 16. Slot; 17. Fixed plate; 18. Tension spring; 19. First lead screw; 20. Threaded sleeve; 21. First guide post; 22. Guide sleeve; 23. Second guide post; 24. Second lead screw; 25. Friction plate; 26. Friction frame; 27. Hydraulic telescopic rod; 28. Support part; 29. ​​Positioning post. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] This specification provides one or more embodiments of a mold cavity vacuuming and venting structure, such as... Figure 1 and Figure 3 As shown, it includes a mounting frame 1 and a movable seat 2 disposed above the mounting frame 1. A translation unit for driving the movable seat 2 to move is mounted on the mounting frame 1. A first exhaust block 3 is disposed above the movable seat 2, a second exhaust block 4 is disposed above the first exhaust block 3, a first fixed seat 5 is disposed below the first exhaust block 3, and a second fixed seat 6 is disposed above the second exhaust block 4.

[0026] The first fixed seat 5 and the second fixed seat 6 are respectively equipped with disassembly and assembly parts, which are used to install the second exhaust block 4 and the first fixed seat 5 on the second fixed seat 6 and the first fixed seat 5 respectively;

[0027] The movable seat 2 is equipped with a guide that mates with the second fixed seat 6. The second vent block 4 is equipped with a connector that mates with the mold. The movable seat 2 is equipped with a spacing adjustment structure that mates with the first fixed seat 5. The operator slides the second vent block 4 onto the upper mold using the connector. The operator then fixes the mounting bracket 1 onto the lower mold. The spacing adjustment structure adjusts the distance between the first fixed seat 5 and the movable seat 2, thereby adjusting the initial distance between the first vent block 3 and the second vent block 4. The movable seat 2 is driven to translate relative to the mounting bracket 1 by the translation unit, so that the first vent block 3 and the second vent block 4 abut against the upper mold and the lower mold, respectively. Next, ensure that the first vent block 3 and the second vent block 4 are connected to the venting channel on the die-casting mold cavity. When the upper mold moves vertically relative to the lower mold, the upper mold drives the second vent block 4 and the second fixed seat 6 to slide relative to the movable seat 2 and the first vent block 3. By adjusting the initial distance between the first vent block 3 and the second vent block 4, ensure that the first vent block 3 and the second vent block 4 can be tightly pressed together when the upper mold and the lower mold are closed, so that the contact pressure of the first vent block 3 and the second vent block 4 is within the preset range, thereby ensuring that the sealing surfaces of the first vent block 3 and the second vent block 4 are uniformly pressed over the entire area, which greatly improves the reliability of the vacuum seal.

[0028] In embodiments of this utility model, such as Figure 1 , Figure 2 and Figure 3 As shown, the guide includes several guide plates 8 fixedly mounted on the movable seat 2. A bracket 7 is slidably fitted onto the outside of the guide plates 8, and the bracket 7 is fixedly connected to the second fixed seat 6. Several protrusions 9 are fixedly connected to the first exhaust block 3. An exhaust chamber 10 that mates with the protrusions 9 is opened on the second exhaust block 4. One end of the second exhaust block 4 has an air extraction hole 11 that mates with the exhaust chamber 10. The other end of the exhaust chamber 10 has an exhaust pipe 12 that communicates with the exhaust chamber 10. The connector includes support portions 28 fixedly mounted on both sides of the second exhaust block 4. A positioning post 29 passes through the support portion 28 and is used for fixed connection with the mold. The positioning post 29 is fixedly mounted on the upper mold, and the operator drives... The movable mounting bracket 1 and the second exhaust block 4 move so that the positioning post 29 passes through the support part 28. The air extraction hole 11 on the second exhaust block 4 corresponds to the exhaust channel on the die-casting mold cavity. The exhaust pipe 12 is connected to the input end of the external vacuum equipment through a hose. When the upper mold and the lower mold are closed, the vacuum equipment is started. The air in the die-casting mold cavity enters the gap between the exhaust chamber 10 and the protrusion 9 through the exhaust channel and the air extraction hole 11. The air in the exhaust chamber 10 is finally extracted through the exhaust pipe 12. When the upper mold and the lower mold are separated, the upper mold drives the second exhaust block 4 and the second fixed seat 6 to move vertically through the positioning post 29 and the support part 28. The second fixed seat 6 drives the bracket 7 to slide relative to the guide plate 8 and the movable seat 2.

[0029] In embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the assembly includes slide rails 13 fixedly mounted on the first fixed base 5 and the second fixed base 6 respectively. Several sliders 14 are fixedly connected to the first vent block 3 and the second vent block 4 respectively, and the sliders 14 are slidably mounted on the corresponding slide rails 13. Several insert rods 15 pass through the first fixed base 5 and the second fixed base 6 respectively. Several slots 16 that mate with the insert rods 15 are respectively opened on the first vent block 3 and the second vent block 4. One end of the insert rod 15 is located in the corresponding slot 16, and the other end of the insert rod 15 is fixedly connected to a fixed plate 17. A tension spring 18 is sleeved on the outside of the insert rod 15, and one end of the tension spring 18 is fixedly connected to the fixed plate 17. The other end of the extension spring 18 is fixedly connected to the corresponding first fixed seat 5 or second fixed seat 6. The operator drives the fixed plate 17 and the insertion rod 15 to move, and the extension spring 18 is in a stretched state so that the end of the insertion rod 15 disengages from the corresponding slot 16, releasing the restriction on the position of the first exhaust block 3 or the second exhaust block 4. The operator drives the first exhaust block 3 or the second exhaust block 4 to slide, so that the slider 14 slides relative to the slide rail 13. Finally, the slider 14 slides off the slide rail 13, so that the first exhaust block 3 and the second exhaust block 4 can be removed from the first fixed seat 5 and the second fixed seat 6 respectively, making it convenient to replace the first exhaust block 3 and the second exhaust block 4.

[0030] In embodiments of this utility model, such as Figure 1 , Figure 3 and Figure 4As shown, the spacing adjustment structure includes a first lead screw 19 fixedly installed on a first fixed base 5. A threaded sleeve 20 is fitted around the outside of the first lead screw 19, and the threaded sleeve 20 is rotatably connected to the movable base 2. A plurality of first guide posts 21 are fixedly connected to the first fixed base 5. A guide sleeve 22 is slidably fitted around the outside of the first guide posts 21, and the guide sleeve 22 is fixedly connected to the movable base 2. The translation unit includes a second guide post 23 fixedly installed on a mounting frame 1. A second lead screw 24 is rotatably connected to the mounting frame 1. The second guide post 23 and the second lead screw 24 respectively pass through the movable base 2, and the connection between the second lead screw 24 and the movable base 2 is a threaded connection. A friction plate 25 is fixedly connected to the end of the threaded sleeve 20. A hydraulic telescopic rod 27 is fixedly connected to the mounting frame 1. A friction frame 26 is fixedly connected to the output end of the hydraulic telescopic rod 27, and the friction frame 26... The first lead screw 24 and the friction plate 25 are respectively in contact with the second lead screw 24 and the friction plate 25. The operator drives the threaded sleeve 20 to rotate, which drives the first lead screw 19 and the first fixed seat 5 to move vertically relative to the movable seat 2. The first fixed seat 5 drives the first guide post 21 to slide relative to the guide sleeve 22, which changes the initial distance between the first exhaust block 3 and the second exhaust block 4. By driving the second lead screw 24 to rotate, the second lead screw 24 can drive the movable seat 2 to slide relative to the second guide post 23. The movable seat 2 can then drive the first exhaust block 3 and the second exhaust block 4 to move synchronously in the horizontal direction, ensuring that the first exhaust block 3 and the second exhaust block 4 can abut against the mold. The friction frame 26 is driven to move by the hydraulic telescopic rod 27, so that the friction frame 26 presses the second lead screw 24 and the friction plate 25 respectively, reducing the possibility of the threaded sleeve 20 and the second lead screw 24 rotating due to non-human factors.

[0031] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0032] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mold cavity vacuum exhaust structure, comprising a mounting frame (1) and a movable seat (2) disposed above the mounting frame (1), characterized in that, The mounting bracket (1) is equipped with a translation unit for driving the movable seat (2) to translate. A first exhaust block (3) is provided above the movable seat (2), a second exhaust block (4) is provided above the first exhaust block (3), a first fixed seat (5) is provided below the first exhaust block (3), and a second fixed seat (6) is provided above the second exhaust block (4). The first fixed seat (5) and the second fixed seat (6) are respectively equipped with disassembly and assembly parts, which are used to install the second exhaust block (4) and the first fixed seat (5) on the second fixed seat (6) and the first fixed seat (5) respectively; The movable seat (2) is equipped with a guide that cooperates with the second fixed seat (6), the second exhaust block (4) is equipped with a plug-in component that cooperates with the mold, and the movable seat (2) is equipped with a spacing adjustment structure that cooperates with the first fixed seat (5).

2. The mold cavity vacuum venting structure according to claim 1, characterized in that, The guide includes several guide plates (8) fixedly installed on the movable seat (2), and a bracket (7) is slidably sleeved on the outside of the guide plate (8), and the bracket (7) is fixedly connected to the second fixed seat (6).

3. The mold cavity vacuuming and venting structure according to claim 1, characterized in that, The first exhaust block (3) is fixedly connected with several protrusions (9), the second exhaust block (4) is provided with an exhaust chamber (10) that cooperates with several protrusions (9), one end of the second exhaust block (4) is provided with an air extraction hole (11) that cooperates with the exhaust chamber (10), and the other end of the exhaust chamber (10) is provided with an exhaust pipe (12) that communicates with the exhaust chamber (10).

4. The mold cavity vacuum venting structure according to claim 1, characterized in that, The connector includes a support portion (28) fixedly installed on both sides of the second exhaust block (4), and a positioning post (29) is passed through the support portion (28). The positioning post (29) is used to fix and connect with the mold.

5. The mold cavity vacuum venting structure according to claim 1, characterized in that, The assembly / disassembly assembly includes slide rails (13) fixedly installed on the first fixed seat (5) and the second fixed seat (6), and several sliders (14) fixedly connected to the first exhaust block (3) and the second exhaust block (4), with the sliders (14) slidably installed on the corresponding slide rails (13). Several insert rods (15) pass through the first fixed seat (5) and the second fixed seat (6), and several slots (16) that cooperate with the insert rods (15) are opened on the first exhaust block (3) and the second exhaust block (4). One end of the insert rod (15) is located in the corresponding slot (16), and the other end of the insert rod (15) is fixedly connected to a fixed plate (17). A tension spring (18) is sleeved on the outside of the insert rod (15). One end of the tension spring (18) is fixedly connected to the fixed plate (17), and the other end of the tension spring (18) is fixedly connected to the corresponding first fixed seat (5) or second fixed seat (6).

6. The mold cavity vacuum venting structure according to claim 1, characterized in that, The spacing adjustment structure includes a first lead screw (19) fixedly installed on a first fixed seat (5), a threaded sleeve (20) is sleeved on the outside of the first lead screw (19), and the threaded sleeve (20) is rotatably connected to the movable seat (2). A plurality of first guide posts (21) are fixedly connected on the first fixed seat (5), and a guide sleeve (22) is slidably sleeved on the outside of the first guide post (21), and the guide sleeve (22) is fixedly connected to the movable seat (2).

7. The mold cavity vacuum venting structure according to claim 6, characterized in that, The translation unit includes a second guide post (23) fixedly installed on the mounting frame (1), a second lead screw (24) rotatably connected to the mounting frame (1), the second guide post (23) and the second lead screw (24) respectively passing through the movable seat (2), and the connection between the second lead screw (24) and the movable seat (2) is a threaded connection. A friction plate (25) is fixedly connected to the end of the threaded sleeve (20), a hydraulic telescopic rod (27) is fixedly connected to the mounting frame (1), and a friction frame (26) is fixedly connected to the output end of the hydraulic telescopic rod (27), and the friction frame (26) is in contact with the second lead screw (24) and the friction plate (25) respectively.

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