Box assembling assisting mechanism of iron mold sand-coated molding machine

Abstract

The utility model discloses an auxiliary box closing mechanism of a swage sand-coated molding machine, which relates to the technical field of sand-coated molding and comprises a lower shell, an equipment support is fixedly mounted on the lower shell, an upper shell is fixedly mounted at the upper end of the equipment support, and a box closing mechanism is arranged between the upper shell and the lower shell. The box closing mechanism comprises a lower sand box fixedly mounted on the lower shell and an oil cylinder fixedly mounted in the upper shell, an upper sand box is fixedly mounted at the lower end of the oil cylinder, a cleaning mechanism is arranged above the lower sand box, a guide rod is fixedly mounted between the upper shell and the lower shell, a lifting seat is slidably mounted on the guide rod, and the lifting seat is fixedly mounted at the output tail end of the oil cylinder; a mounting base is arranged at the bottom of the lower sand box; a driving rod is fixedly mounted on the lower surface of the lifting seat. According to the auxiliary mold closing mechanism of the iron mold sand-coated molding machine, the mold closing mechanism and the cleaning mechanism are matched for use, so that the upper end of the lower sand box can be cleaned before mold closing, and the air tightness after mold closing is ensured.

Description

Technical Field

[0001] This utility model relates to the field of sand coating molding technology, specifically to the auxiliary box mechanism of an iron mold sand coating molding machine. Background Technology

[0002] A sand-coated molding machine is a casting equipment that coats the inner cavity of a metal mold (iron mold) with a thin layer of molding sand to form a casting mold. It combines the advantages of metal mold and shell mold casting. The coated sand is injected into the gap between the iron mold and the model through a sand-shooting device and solidified, producing castings with high dimensional accuracy, good surface quality and low scrap rate. It is widely used in the production of high-quality castings such as crankshafts, connecting rods, and brake discs.

[0003] In the design of sand-coated molding machines, two main sand box sections are typically configured: an upper sand box and a lower sand box. These two sand boxes play a crucial role in the molding process. When molding is required, the upper sand box moves downwards, driven by a hydraulic cylinder, and tightly engages with the lower sand box; this process is called the box closing action. The completion of the box closing action facilitates the subsequent sand-shooting operation, as the sand box now forms a closed space, allowing for effective sand filling and molding.

[0004] However, during the unpacking process, residual molding sand in the upper sand box may sometimes fall due to vibration. This residual molding sand may fall to the upper part of the lower sand box, and when the upper and lower sand boxes are closed again, this residual molding sand will be located between the two sand boxes. In this case, the presence of molding sand will interfere with the tight contact between the sand boxes, thus affecting the airtightness after the boxes are closed. Utility Model Content

[0005] The purpose of this utility model is to provide an auxiliary box mechanism for a sand-coating molding machine for iron molds, so as to solve the problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a closing box mechanism for an iron mold sand coating molding machine, comprising a lower housing, an equipment bracket fixedly installed on the lower housing, an upper housing fixedly installed on the upper end of the equipment bracket, a closing box mechanism provided between the upper housing and the lower housing, the closing box mechanism comprising a lower sand box fixedly installed on the lower housing and an oil cylinder fixedly installed inside the upper housing, an upper sand box fixedly installed at the lower end of the oil cylinder, and a cleaning mechanism provided above the lower sand box.

[0007] Preferably, a guide rod is fixedly installed between the upper housing and the lower housing, a lifting seat is slidably installed on the guide rod, and the lifting seat is fixedly installed at the output end of the hydraulic cylinder. The bottom of the lower sand box is provided with an installation base, and a drive rod is fixedly installed on the lower surface of the lifting seat.

[0008] Preferably, the lifting seat has movable holes at its four corners, and the lifting seat is movably mounted on the guide rod through the movable holes.

[0009] Preferably, the upper sand box is fixedly installed at the lower end of the oil cylinder via a lifting seat, and the lower sand box is fixedly installed on the lower housing via a mounting base, with the upper sand box and the lower sand box aligned vertically.

[0010] Preferably, the cleaning mechanism includes a rack fixedly installed at the lower end of the drive rod, and a retainer and a positioning sleeve fixedly installed on the mounting base. A drive screw is rotatably installed on the retainer, and a screw nut is threaded onto the drive screw. A cleaning brush is fixedly installed between the screw nut and the drive screw. A linkage shaft is rotatably installed on the positioning sleeve. A gear is fixedly installed at the middle position of the linkage shaft, and the gear meshes with the rack. Helical gears are fixedly installed on both the linkage shaft and the drive screw, and the helical gears on the linkage shaft and the drive screw mesh with each other.

[0011] Preferably, both the retainer and the positioning sleeve are provided with bearings, the drive screw is rotatably mounted on the retainer through the bearings, and the linkage shaft is rotatably mounted on the positioning sleeve through the retainer.

[0012] Preferably, the cleaning brush is movably mounted above the lower sand box via a lead screw nut, and the upper end of the positioning sleeve has a through hole, through which the rack extends into the positioning sleeve.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In this application, under the action of the hydraulic cylinder, the lifting seat will perform a reciprocating motion in the vertical direction. When the lifting seat moves downward, the upper sand box descends accordingly, closely cooperating with the lower sand box to realize the closing process; conversely, when the lifting seat moves upward, the upper sand box also rises accordingly, separating from the lower sand box to complete the opening process.

[0015] 2. In this application, before the upper and lower sand boxes are assembled, the drive rod drives the rack to move downwards. The downward movement of the rack then causes the gear to rotate. This rotation is further transmitted to the linkage shaft, causing it to rotate. The rotation of the linkage shaft drives the lead screw to rotate, which in turn causes the cleaning brush on the lead screw nut to move forward, thus cleaning the sand particles at the upper end of the lower sand box. This cleaning process ensures that the airtightness is maintained after the boxes are assembled. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial structural schematic diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the box closing mechanism of this utility model;

[0019] Figure 4 This is a schematic diagram of the cleaning mechanism of this utility model.

[0020] The following are the labeling elements in the diagram: 1. Lower housing; 2. Equipment support; 3. Upper housing; 4. Closing mechanism; 401. Hydraulic cylinder; 402. Guide rod; 403. Lifting seat; 404. Upper sand box; 405. Drive rod; 406. Mounting base; 407. Lower sand box; 5. Cleaning mechanism; 501. Rack; 502. Linkage shaft; 503. Helical gear; 504. Cage; 505. Drive screw; 506. Screw nut; 507. Cleaning brush; 508. Gear; 509. Positioning sleeve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1 and Figure 2 As shown, this utility model provides a technical solution for the assembling box mechanism of an iron mold sand coating molding machine, including a lower shell 1, an equipment support 2 fixedly installed on the lower shell 1, an upper shell 3 fixedly installed on the upper end of the equipment support 2, a assembling box mechanism 4 between the upper shell 3 and the lower shell 1, and a cleaning mechanism 5 above the lower sand box 407. Through the cooperation of the assembling box mechanism 4 and the cleaning mechanism 5, the upper end of the lower sand box 407 can be cleaned before assembling the box to ensure the airtightness after assembling the box.

[0023] like Figure 2 and Figure 3 As shown, the sand box closing mechanism 4 includes a lower sand box 407 fixedly installed on the lower housing 1 and a hydraulic cylinder 401 fixedly installed in the upper housing 3. An upper sand box 404 is fixedly installed at the lower end of the hydraulic cylinder 401. A guide rod 402 is fixedly installed between the upper housing 3 and the lower housing 1. A lifting seat 403 is slidably installed on the guide rod 402 and is fixedly installed at the output end of the hydraulic cylinder 401. A mounting base 406 is provided at the bottom of the lower sand box 407. A drive rod 405 is fixedly installed on the lower surface of the lifting seat 403. Movable holes are provided at the four corners of the lifting seat 403. The lifting seat 403 is movably installed on the guide rod 402 through the movable holes.

[0024] Specifically, when the hydraulic cylinder 401 is activated, it drives the lifting seat 403 to move up and down. Specifically, when the lifting seat 403 moves downwards, it pulls the upper sand box 404 downwards as well, allowing the upper sand box 404 to tightly engage with the lower sand box 407, thus successfully completing the closing action. Conversely, when the lifting seat 403 moves upwards, it similarly moves the upper sand box 404 upwards, causing it to separate from the lower sand box 407, thus successfully completing the opening action.

[0025] like Figure 2 and Figure 4 As shown, the cleaning mechanism 5 includes a rack 501 fixedly installed at the lower end of the drive rod 405, a retainer 504 and a positioning sleeve 509 fixedly installed on the mounting base 406. A drive screw 505 is rotatably installed on the retainer 504, and a screw nut 506 is threaded onto the drive screw 505. A cleaning brush 507 is fixedly installed between the screw nut 506 and the drive screw 506. A linkage shaft 502 is rotatably installed on the positioning sleeve 509. A gear 508 is fixedly installed at the middle position of the linkage shaft 502 and meshes with the rack 501. Helical gears 503 are fixedly installed on both the linkage shaft 502 and the drive screw 505, and the helical gears 503 on the linkage shaft 502 and the drive screw 505 mesh with each other. Bearings are provided on both the retainer 504 and the positioning sleeve 509. The drive screw 505 is rotatably installed on the retainer 504 through the bearings, and the linkage shaft 502 is rotatably installed on the positioning sleeve 509 through the retainer 504.

[0026] Specifically, before the upper sand box 404 and the lower sand box 407 are engaged, the drive rod 405 first performs an action, driving the rack 501 downwards. After the rack 501 completes its downward movement, it further causes the gear 508 to rotate. The rotation of the gear 508 then triggers the rotation of the linkage shaft 502. Once the linkage shaft 502 starts rotating, it continues to transmit power, causing the drive screw 505 to also start rotating. The rotation of the drive screw 505 causes the cleaning brush 507 on the screw nut 506 to move forward. The forward movement of the cleaning brush 507 is to effectively clean the sand particles on the upper end of the lower sand box 407, ensuring that the entire device maintains good airtightness after the upper sand box 404 and the lower sand box 407 are engaged.

[0027] Working Principle: In operation, first activate hydraulic cylinder 401. Activation cylinder 401 drives lifting seat 403 to move up and down. When lifting seat 403 moves downwards, it drives upper sand box 404 downwards, engaging with lower sand box 407 to complete the closing action. When lifting seat 403 moves upwards, it drives upper sand box 404 upwards, disengaging with lower sand box 407 to complete the opening action. Before the upper sand box 404 engages with lower sand box 407, drive rod 405 drives rack 501 downwards. After rack 501 moves downwards, it drives gear 508 to rotate. Gear 508's rotation drives linkage shaft 502 to rotate. Linkage shaft 502's rotation drives drive screw 505 to rotate. Drive screw 505's rotation drives cleaning brush 507 on screw nut 506 to move forward, cleaning the sand particles on the upper part of lower sand box 407 and ensuring airtightness after closing. After the upper part of the lower sand box 407 is cleaned, the rack 501 will separate from the gear 508, stopping the cleaning action, so that the upper sand box 404 can continue to descend to complete the closing action.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A jacking box mechanism for a sand-coated iron mold molding machine, comprising a lower housing (1), wherein an equipment bracket (2) is fixedly mounted on the lower housing (1), and an upper housing (3) is fixedly mounted on the upper end of the equipment bracket (2), characterized in that: A box-closing mechanism (4) is provided between the upper shell (3) and the lower shell (1). The box-closing mechanism (4) includes a lower sand box (407) fixedly installed on the lower shell (1) and an oil cylinder (401) fixedly installed in the upper shell (3). An upper sand box (404) is fixedly installed at the lower end of the oil cylinder (401). A cleaning mechanism (5) is provided above the lower sand box (407).

2. The auxiliary box mechanism of the iron mold sand coating molding machine according to claim 1, characterized in that: A guide rod (402) is fixedly installed between the upper housing (3) and the lower housing (1). A lifting seat (403) is slidably installed on the guide rod (402), and the lifting seat (403) is fixedly installed at the output end of the oil cylinder (401). The bottom of the lower sand box (407) is provided with an installation base (406), and a drive rod (405) is fixedly installed on the lower surface of the lifting seat (403).

3. The auxiliary box mechanism of the iron mold sand coating molding machine according to claim 2, characterized in that: The lifting seat (403) has movable holes at its four corners, and the lifting seat (403) is movably installed on the guide rod (402) through the movable holes.

4. The auxiliary box mechanism of the iron mold sand coating molding machine according to claim 3, characterized in that: The upper sand box (404) is fixedly installed at the lower end of the oil cylinder (401) via the lifting seat (403), and the lower sand box (407) is fixedly installed on the lower housing (1) via the mounting base (406), with the upper sand box (404) and the lower sand box (407) aligned vertically.

5. The auxiliary box mechanism of the iron mold sand coating molding machine according to claim 4, characterized in that: The cleaning mechanism (5) includes a rack (501) fixedly installed at the lower end of the drive rod (405), a retainer (504) and a positioning sleeve (509) fixedly installed on the mounting base (406). A drive screw (505) is rotatably installed on the retainer (504), and a screw nut (506) is threaded onto the drive screw (505). A cleaning brush (507) is fixedly installed between the screw nut (506). A linkage shaft (502) is rotatably installed on the positioning sleeve (509). A gear (508) is fixedly installed in the middle of the linkage shaft (502), and the gear (508) meshes with the rack (501). Helical gears (503) are fixedly installed on both the linkage shaft (502) and the drive screw (505), and the helical gears (503) on the linkage shaft (502) and the drive screw (505) mesh with each other.

6. The auxiliary box mechanism of the iron mold sand coating molding machine according to claim 5, characterized in that: Bearings are provided on both the retainer (504) and the positioning sleeve (509). The drive screw (505) is rotatably mounted on the retainer (504) through the bearings, and the linkage shaft (502) is rotatably mounted on the positioning sleeve (509) through the retainer (504).

7. The auxiliary box mechanism of the iron mold sand coating molding machine according to claim 6, characterized in that: The cleaning brush (507) is movably mounted above the lower sand box (407) via a lead screw nut (506). The upper end of the positioning sleeve (509) has a through hole, and the rack (501) extends into the positioning sleeve (509) through the through hole.

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