Molding machine

Abstract

The utility model discloses a molding machine which comprises a machine frame, an upper sand box and a lower sand box, the upper sand box and the lower sand box are arranged on the machine frame, an upper sand barrel is arranged corresponding to the upper sand box, a lower sand barrel is arranged corresponding to the lower sand box, a sand box sand inlet flange is arranged on the side face of the lower sand box, a sand barrel sand outlet flange is arranged on the inner side of the lower sand barrel, and the upper sand barrel is arranged on the top of the machine frame and communicated with the upper sand box. The lower sand barrel is fixed on the rack through a bracket, a sand outlet flange of the sand barrel forms a sand outlet flange at a fixed position, and a sand box sand inlet flange of the lower sand box is butted and communicated with the sand outlet flange of the sand barrel to form a sand shooting channel structure at a fixed height position. A gap between the sand outlet flange of the lower sand barrel and the sand inlet flange of the sand box can be designed to be relatively small, so that molding sand leakage in the sand shooting process is greatly reduced, and the cleaning workload of workers is reduced; the moving distance of the lower box lifting cylinder and the upper box lifting cylinder each time is relatively short, and the time (about a box / 30 seconds) for completing molding of one box is obviously shorter than the molding time of a molding machine in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of casting technology, and in particular to a molding machine. Background Technology

[0002] In the field of casting equipment technology, molding machines using top and bottom sand injection molding processes generate a large amount of molding sand leakage during actual production, affecting the normal operation of the molding machine. Furthermore, the manual cleaning workload is significant, and the molding machine's efficiency is low (it takes approximately 40 seconds to complete the molding of one box of sand molds). Existing molding machines simply perform sand compaction from one end, resulting in a large movement distance and long processing time for the compaction cylinder.

[0003] like Figure 3 and Figure 4 The left-middle image shows the sand-passing structure of a conventional molding machine; among which, Figure 3 The sand box inlet flange and the sand bucket outlet flange are disconnected. Figure 4 This indicates that the sand box inlet flange and the sand bucket outlet flange are connected.

[0004] When molding on the molding machine, a proper gap must be maintained between the sand box inlet flange and the sand bucket outlet flange to prevent collision or scratching between them. When the sand box inlet flange and the sand bucket outlet flange are connected, a flange seal should be used to reduce sand leakage during injection. Figure 4 As can be seen from the left figure, the height of the sand box inlet flange relative to the sand bucket outlet flange in existing molding machine products can be adjusted within a certain range to meet the needs of sand mold forming at different heights.

[0005] The existing sand bucket setting, combined with Figure 3 and Figure 4 As shown in the left figure, in order to achieve the change of sand mold thickness, the connection height between the sand flange and the sand box inlet flange needs to meet the adjustment range within a certain height range. The height dimensions of the sand box inlet flange and the sand barrel outlet flange are relatively large. The gap height between the sand barrel outlet flange and the sand box inlet flange is relatively large. During the sand shooting process of the molding machine, the gap between the sand barrel outlet flange and the sand box inlet flange will be filled with molding sand. When the sand barrel outlet flange and the sand box inlet flange are disconnected, the molding sand in the gap between the sand barrel outlet flange and the sand box inlet flange will naturally fall off. The larger the gap, the larger the amount of molding sand that falls off, and the larger the cleaning workload. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a molding machine that minimizes the amount of molding sand that falls off during molding.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] The molding machine includes a frame and an upper sand box and a lower sand box mounted on the frame. The upper sand box is equipped with an upper sand barrel, and the lower sand box is equipped with a lower sand barrel. The side of the lower sand box is equipped with a sand box inlet flange, and the inside of the lower sand barrel is equipped with a sand barrel outlet flange. The upper sand barrel is located at the top of the frame and is connected to the upper sand box. The lower sand barrel is fixed to the frame by a bracket. The sand barrel outlet flange forms a fixed-position sand outlet flange. After the sand box inlet flange and the sand barrel outlet flange of the lower sand box are connected, a sand injection channel structure at a fixed height is formed.

[0009] Further:

[0010] The lower sand bucket is located on the side of the frame, and the sand bucket outlet flange is located on the inner bottom of the lower sand bucket.

[0011] The lower sand bucket and the side of the frame are fixedly connected by a detachable and adjustable structure.

[0012] The bottom of the frame is equipped with a lower working cylinder for driving the lower sand box, and the top of the frame is equipped with an upper working cylinder for the upper sand box.

[0013] The bottom of the frame is provided with a base, and above the base from bottom to top are a lower box bracket and a lower box auxiliary bracket. The base is provided with a lower box lifting cylinder, which is connected to the lower box bracket. A lower box auxiliary lifting cylinder is provided between the lower box bracket and the lower box auxiliary bracket. The lower box bracket is provided with a lower sand mold pressure plate, and the lower sand box is connected to the lower box auxiliary bracket. The lower sand mold pressure plate is located inside the lower sand box.

[0014] The frame is equipped with a set of vertical guide columns, and the lower box auxiliary bracket is movable and cooperates with the guide columns.

[0015] The lower box auxiliary lifting cylinders are a pair arranged opposite each other, located on opposite sides of the lower sand mold pressure plate.

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] The molding machine has a reasonable structural design. The upper sand box is fixed to the top for sand injection, and the lower sand box is fixed to the side for sand injection. The gap between the sand outlet flange of the lower sand barrel and the sand inlet flange of the sand box can be designed to be relatively small, which greatly reduces the leakage of molding sand during the sand injection process and reduces the workload of workers in cleaning. The processes of closing the box, removing the template from the box, and closing the mold are completed by the linkage of the lower box lifting cylinder and the upper box lifting cylinder. The movement distance of the lower box lifting cylinder and the upper box lifting cylinder is relatively short each time, and the time to complete the molding of one box (about 30 seconds per box) is significantly shorter than the molding time of existing molding machines. Attached Figure Description

[0018] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0019] Figure 1 and 2 This is a schematic diagram of the molding machine structure of this utility model.

[0020] Figure 3 This is a comparison diagram showing the separation of the sand bucket outlet flange and the sand box inlet flange in this utility model and the prior art.

[0021] Figure 4 This is a comparison diagram of the sand delivery channel connection in this utility model and the prior art.

[0022] In the picture:

[0023] 11. Lower sand bucket body; 121. Sand bucket discharge channel; 122. Sand delivery channel; 123. Sand passage flange gap; 13. Sand bucket discharge flange seat; 14. Sand bucket discharge flange; 15. Sand bucket discharge flange seal; 16. Sand box inlet flange; 17. Sand filling port I; 18. Sand box inlet flange seat; 19. Sand gate mechanism I; 21. Upper sand bucket body; 22. Sand filling port II; 23. Sand gate mechanism II; 31. Guide column; 32. Base; 33. Lower box bracket; 34. Lower box auxiliary 341. Lower sand mold pressure plate; 35. Upper box bracket; 36. Upper box auxiliary bracket; 37. Top frame; 38. Lower sand box; 39. Upper sand box; 41. Lower box lifting cylinder; 42. Lower box auxiliary lifting cylinder; 43. Upper box lifting cylinder; 44. Upper box auxiliary working cylinder; 5. Exit transition frame; 6. Machine frame; 61. Base; 63. Column cover; 64. Door; 65. Fixed door; 66. Sliding door; 67. Lower box sliding mechanism; 7. Mold frame mechanism; 8. Pushing mechanism. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and through the description of the examples.

[0025] like Figures 1 to 4 As shown, the molding machine includes a frame 6 and an upper sand box 39 and a lower sand box 38 mounted on the frame. The upper sand box is equipped with an upper sand barrel, and the lower sand box is equipped with a lower sand barrel. The side of the lower sand box is equipped with a sand box inlet flange, and the inside of the lower sand barrel is equipped with a sand barrel outlet flange. The upper sand barrel is located at the top of the frame and is connected to the upper sand box. The lower sand barrel is fixed to the frame by a bracket. The sand barrel outlet flange forms a fixed-position sand outlet flange. After the sand box inlet flange and the sand barrel outlet flange of the lower sand box are connected, a sand injection channel structure at a fixed height is formed.

[0026] The molding machine of this utility model has a reasonable structural design. The upper sand box is fixed to the top for sand injection, and the lower sand box is fixed to the side for sand injection. The gap between the sand outlet flange of the lower sand barrel and the sand inlet flange of the sand box can be designed to be relatively small, which greatly reduces the leakage of molding sand during the sand injection process and reduces the workload of workers in cleaning.

[0027] The lower sand bucket is located on the side of the frame, and the sand outlet flange is located on the inner bottom of the lower sand bucket. Furthermore, the lower sand bucket and the side of the frame are fixedly connected by a detachable and adjustable structure, allowing for adjustment.

[0028] The bottom of the frame is equipped with a lower working cylinder for driving the lower sand box, and the top of the frame is equipped with an upper working cylinder for the upper sand box. Before the upper and lower sand boxes are closed, the lower sand box lifting cylinder rises to a fixed position. The lower and upper sand box lifting cylinders move relatively short distances each time, and the time to complete one sand box molding (about 30 seconds per box) is significantly shorter than the molding time of existing molding machines.

[0029] The bottom of the frame is provided with a base, and above the base from bottom to top are a lower box bracket and a lower box auxiliary bracket. The base is provided with a lower box lifting cylinder, which is connected to the lower box bracket. A lower box auxiliary lifting cylinder is provided between the lower box auxiliary bracket and the lower box bracket. A lower sand mold pressure plate 341 is provided on the lower box bracket. The lower sand box is connected to the lower box auxiliary bracket, and the lower sand mold pressure plate is located inside the lower sand box.

[0030] The frame is equipped with a set of vertical guide columns, and the lower box auxiliary bracket is movably fitted with the guide columns. The lower box auxiliary lifting cylinders are a pair of oppositely arranged cylinders, located on opposite sides of the lower sand mold pressure plate, ensuring stability and reliability.

[0031] The molding structure device of this utility model belongs to the molding system of the molding machine, including guide columns, base, lower box bracket, lower box auxiliary bracket, upper box bracket, upper box auxiliary bracket, top frame, lower sand box, upper sand box, upper sand bucket and lower sand bucket, etc.; the molding system completes the sand box closing, molding sand compaction and demolding through the lifting working cylinder.

[0032] The key component of the molding machine's molding structure is the lower sand barrel connecting flange structure. This structure consists of a sand injection channel, a sand barrel outlet flange seat 13, a sand barrel outlet flange 14, a sand barrel outlet flange seal 15, a sand box inlet flange 16, and a sand box inlet flange seat 18. The sand injection channel, sand barrel outlet flange seat, sand barrel outlet flange, sand barrel outlet flange seal, sand box inlet flange, and sand box inlet flange seat are all positioned at a fixed height, allowing the sand injection channel to connect and inject sand.

[0033] Before the upper and lower sand boxes are closed, the lower box lifting cylinder rises to a fixed position; after the sand is shot after the boxes are closed, the device compacts the molding sand through the upper sand box lifting cylinder; the lower box lifting cylinder and the upper box lifting cylinder move relatively short distances each time, and the time to complete the molding of one box is significantly shorter than the molding time of existing molding machines.

[0034] The preferred specific example of this utility model is as follows:

[0035] The base 32, lower box bracket 34, lower box auxiliary bracket 33, upper box bracket 35, upper box auxiliary bracket 36, and top frame 37 of the molding machine are mounted on guide posts 31. The lower box bracket, lower box auxiliary bracket, upper box bracket, and upper box auxiliary bracket all slide up and down in cooperation with the guide posts through corresponding guide post holes.

[0036] The base 32 is fixedly installed on the molding machine base 61, which is located at the bottom of the frame 6. A set of guide columns 31 is fixedly installed on the base, and a column cover 63 is provided outside the guide columns. A lower box lifting cylinder 41 is fixedly installed on the base. One side of the molding area of ​​the frame is a box structure. A set of doors 64 is provided at the bottom of the box structure, and a fixed door 65 and a sliding door 66 are provided at the top. A movable mold frame mechanism 7 and a pushing mechanism 8 are provided inside the box structure. A mold exit transition frame 5 is provided on the side of the frame in the molding area corresponding to the pushing mechanism.

[0037] The lower sand bucket body 11 is located on the rear side of the frame and is fixedly installed by a support structure. The lower sand bucket body is vertically installed, and a sand filling port I 17 is provided at the top of the sand filling port I. A sand gate mechanism I 19 is provided corresponding to the sand filling port I. A protruding part is provided on the inner side of the bottom of the lower sand bucket body, which forms a sand bucket discharge flange seat 13. A sand bucket discharge flange 14 is provided corresponding to the sand bucket discharge flange seat. A sand bucket discharge flange seal 15 is provided on the sand bucket discharge flange. A sand bucket discharge channel 121 is provided at the center of the sand bucket discharge flange. A sand box inlet flange seat 18 is provided on the outer side of the lower sand box. A sand box inlet flange 16 is provided corresponding to the sand box inlet flange seat. A sand feeding channel 122 is provided at the center of the sand box inlet flange. A sand passage flange gap 123 is provided at the joint where the sand box inlet flange and the sand bucket discharge flange are connected.

[0038] The lower box lifting cylinder is connected to the lower box bracket; the lower box bracket is equipped with a lower box auxiliary lifting cylinder 42; the lower box auxiliary lifting cylinder is connected to the lower box auxiliary bracket; the distance between the lower box auxiliary bracket and the lower box bracket is adjusted by the lower box auxiliary working cylinder to adjust the height of the lower sand mold; the lower box auxiliary working cylinder drives the lower sand mold to detach from the lower sand box.

[0039] The lower box bracket is equipped with a lower sand mold pressure plate to compact the lower sand mold; the lower sand mold pressure plate moves up and down in the lower sand box cavity; the lower sand mold pressure plate has a sand passage so that the molding sand can pass through the lower sand mold pressure plate and enter the lower sand box cavity.

[0040] The lower sand box is fixedly installed on the lower box auxiliary bracket; the lower sand box is connected to or disconnected from the lower sand bucket.

[0041] The lower sand bucket is fixedly installed on the molding machine frame; the lower sand bucket is connected to or disconnected from the sand box inlet flange associated with the lower sand box through the sand bucket outlet flange and the sand bucket outlet flange seal.

[0042] The top frame is fixedly installed at the top of the guide rod;

[0043] The top frame is equipped with an upper box lifting cylinder 43, which is connected to the upper box auxiliary bracket;

[0044] The upper box auxiliary bracket is equipped with an upper box auxiliary working cylinder and an upper sand bucket body 21. The top of the upper sand bucket body is equipped with a sand filling port II 22, and a sand gate mechanism II 23 is provided for the sand filling port II.

[0045] The upper box auxiliary bracket is connected to the upper box bracket via the upper box auxiliary working cylinder; the distance between the upper box auxiliary bracket and the upper box bracket is adjusted by the upper box auxiliary working cylinder 44 to adjust the height of the upper sand mold; the upper box auxiliary working cylinder drives the upper sand mold to detach from the upper sand box; the upper sand mold pressure plate has a sand passage so that the molding sand passes through the upper sand mold pressure plate and enters the upper sand box cavity.

[0046] The upper sand box is fixedly installed on the upper box bracket.

[0047] The sand outlet of the sand-loading bucket is directly connected to the upper part of the inner cavity of the sand-loading box; the sand outlet of the sand-loading bucket is connected to the fixed sand-loading mold pressure plate to compact the sand-loading mold.

[0048] A mold frame slide is fixedly installed on the guide column between the upper and lower sand boxes; the mold frame slide, mold frame, mold frame support, and mold frame driver together form a mold frame mechanism.

[0049] A molding template is fixedly installed on the mold frame. The top and bottom of the template are integrally formed models. Under the action of the mold frame driver, the mold frame moves linearly back and forth on the mold frame slide to complete the molding after the template is combined with the upper and lower sand boxes.

[0050] A pushing mechanism is provided below the mold frame; the pushing mechanism drives the sand mold to leave the molding machine.

[0051] Work process:

[0052] 1. Closing the box: The lower box lifting cylinder drives the lower box bracket and the lower box auxiliary bracket to rise until the lower sand box contacts the lower plane of the template. The sand box inlet flange of the lower sand box is connected to the sand outlet flange of the lower sand bucket. At the same time, the upper box lifting cylinder drives the upper box bracket and the upper box auxiliary bracket to descend until the upper sand box contacts the upper plane of the template. The box closure is completed.

[0053] 2. Sand shooting: After the box is closed, under the action of pressurized gas, the molding sand in the lower sand bucket enters the lower sand box through the sand shooting channel, and the molding sand in the upper sand bucket enters the upper sand box directly from the top of the upper sand box.

[0054] 3. Molding sand compaction: After sand shooting, the lower box lifting cylinder and the lower box bracket remain stationary. At the same time, the upper box lifting cylinder moves downward, and the stroke of the upper box auxiliary working cylinder and the lower box auxiliary lifting cylinder is reduced by the pressure back compression to compact the molding sand in the upper and lower sand boxes.

[0055] 4. Template release from the box: The upper box lifting cylinder drives the upper box bracket to rise to its original position, while the lower box lifting cylinder drives the lower box bracket to descend to its original position, so that the template is separated from the upper and lower sand boxes. The template frame driver drives the template frame to leave the molding system area to complete the template release from the box.

[0056] 5. Combining the molds: The lower box lifting cylinder drives the lower box bracket and the lower box auxiliary bracket to rise; the upper box lifting cylinder drives the upper box bracket and the upper box auxiliary bracket to fall, so that the lower box sand mold and the upper box sand mold are combined.

[0057] 6. Demolding: After the mold is closed, the upper box lifting cylinder drives the upper box bracket to rise, and the upper box auxiliary working cylinder drives the upper box auxiliary bracket to remain stationary so that the upper sand mold is detached from the upper sand box; at the same time, the lower box auxiliary lifting working cylinder drives the lower box auxiliary bracket and the lower sand box to descend to their original positions, completing the demolding.

[0058] 7. Sand mold offline: The lower box lifting cylinder drives the lower box bracket to descend, so that the sand mold in the lower sand box is on the same plane as the mold exit transition frame. The mold pushing mechanism drives the sand mold through the mold exit transition frame and leaves the molding machine. This completes one box molding.

[0059] 8. Sand mold height adjustment: The height of the lower sand mold is adjusted by the lower box auxiliary lifting cylinder on the lower box auxiliary bracket; the height of the upper sand mold is adjusted by the upper box auxiliary lifting cylinder on the upper box auxiliary bracket.

[0060] 9. Sliding out the lower core – Placing the clay core: During the actual molding process, the placement of the clay core depends on the structural characteristics of the casting. Before demolding, the lower sand mold is slid out of the center area of ​​the molding machine system via the lower mold sliding mechanism 67, and then the clay core is placed. Afterwards, the subsequent processes such as mold assembly are completed.

[0061] The above description is only a preferred embodiment of the present utility model. The above technical features can be arbitrarily combined to form multiple embodiments of the present utility model.

[0062] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the concept and technical solution of the present invention, or the direct application of the concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A molding machine, comprising a frame and an upper sand box and a lower sand box mounted on the frame, wherein an upper sand barrel is provided corresponding to the upper sand box, and a lower sand barrel is provided corresponding to the lower sand box; a sand box inlet flange is provided on the side of the lower sand box, and a sand barrel outlet flange is provided on the inner side of the lower sand barrel; characterized in that: The upper sand bucket is located on the top of the frame and is connected to the upper sand box. The lower sand bucket is fixed on the frame by a bracket. The sand bucket outlet flange forms a fixed position sand outlet flange. The sand box inlet flange of the lower sand box is connected to the sand bucket outlet flange to form a sand shooting channel structure at a fixed height.

2. The molding machine as described in claim 1, characterized in that: The lower sand bucket is located on the side of the frame, and the sand bucket outlet flange is located on the inner bottom of the lower sand bucket.

3. The molding machine as described in claim 2, characterized in that: The lower sand bucket and the side of the frame are fixedly connected by a detachable and adjustable structure.

4. The molding machine as described in claim 1, characterized in that: The bottom of the frame is equipped with a lower working cylinder for driving the lower sand box, and the top of the frame is equipped with an upper working cylinder for the upper sand box.

5. The molding machine as described in claim 4, characterized in that: The bottom of the frame is provided with a base, and above the base from bottom to top are a lower box bracket and a lower box auxiliary bracket. The base is provided with a lower box lifting cylinder, which is connected to the lower box bracket. A lower box auxiliary lifting cylinder is provided between the lower box bracket and the lower box auxiliary bracket. The lower box bracket is provided with a lower sand mold pressure plate, and the lower sand box is connected to the lower box auxiliary bracket. The lower sand mold pressure plate is located inside the lower sand box.

6. The molding machine as described in claim 4, characterized in that: The frame is equipped with a set of vertical guide columns, and the lower box auxiliary bracket is movable and cooperates with the guide columns.

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