Box closing device for sand box

Abstract

The utility model discloses a box closing device for sand boxes, which comprises an upper sand box and a lower sand box, a box closing sleeve is welded at the port of the bottom of the upper sand box, and a plurality of rectangular openings are formed in the surface of the box closing sleeve; according to the utility model, the upper sand box and the lower sand box are moved in opposite directions, so that the box closing sleeve of the upper sand box is sleeved with the rectangular square frame on the periphery of the port of the lower sand box, and a plurality of square columns welded on the end surface of the rectangular square frame respectively penetrate through the correspondingly formed rectangular ports and extend to the outer side of the box closing sleeve; the positioning blocks extend to the parts, exposed out of the box closing sleeve, of the square columns, so that the positioning blocks are connected with the positioning grooves in the surfaces of the square columns in an inserted mode, threaded knobs penetrating through the surfaces of the protruding blocks correspond to threaded grooves formed in the side wall face of the upper sand box, then the threaded knobs are screwed to be in threaded connection with the threaded grooves, and the purpose of box closing of the upper sand box and the lower sand box is achieved; compared with the prior art, the positioning block with the convex block is adopted, and the effect of secondary positioning and locking is achieved in an insertion positioning and thread positioning mode.

Description

Technical Field

[0001] The utility model relates to the field of metallurgical casting, in particular to a box closing device for a sand box. Background Art

[0002] At present, the integral casting mold sand box is widely used in casting production. The characteristics of this type of casting mold sand box are high strength, good rigidity, low cost and easy use. The sand casting mold is often composed of an upper sand box, a lower sand box and a sand core. Among them, the accuracy of the upper sand box and the lower sand box is one of the guarantee factors for the quality of casting.

[0003] The conventional closing positioning of existing sand casting usually adopts the following method: a closing cone is fixed on a plate, a positioning hole for closing is made on the sand mold, and a sand closing pin is inserted during the closing process to close the sand mold. This closing method is simple and easy to operate, but since the positioning holes and closing pins are made of sand molds, the shaking of the sand mold and the alignment error during the operation are particularly prone to wear of the positioning holes and closing pins, resulting in misalignment of the sand mold and ultimately forming the defect of misalignment of the casting. The defects caused by this closing method are often fatal to castings with high dimensional requirements, resulting in a high scrap rate of the castings.

[0004] To this end, a sand box closing device is proposed, which has the advantages of convenient closing and high precision, thereby solving the problems in the above-mentioned background technology. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and provides a sand box closing device.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a closing device for a sand box, comprising an upper sand box and a lower sand box, a closing sleeve is welded at the port at the bottom of the upper sand box, and a plurality of rectangular openings are opened on the surface of the closing sleeve, a lower sand box is arranged below the upper sand box, a rectangular frame is welded around the port at the top of the lower sand box, and a plurality of square columns are welded on the end face of the rectangular frame of the lower sand box, the closing sleeve is socketed with the rectangular frame of the lower sand box, a plurality of the square columns respectively penetrate through the plurality of rectangular openings and extend to the outside of the closing sleeve, a positioning groove is opened on the surface of each of the square columns, and a through hole is opened through the square column above the positioning groove, a positioning block is interspersed in the positioning groove, and a protrusion is welded on the top surface of the positioning block, a threaded knob is interspersed on the surface of the protrusion, and the threaded knob penetrates the square column and is threadedly connected with the outer wall of the upper sand box.

[0007] As a further description of the above technical solution: the surfaces of the square column and the protrusion are both provided with through holes corresponding to the threaded knobs, and the centers of the through holes of the square column and the protrusion are on the same straight line.

[0008] As a further description of the above technical solution: one end of the positioning block is in a locomotive-shaped structure, and the bottom surface of the positioning block is in contact with the top surface of the box-closing sleeve.

[0009] As a further description of the above technical solution: a plurality of thread grooves are provided on both sides of the upper sand box, and the number of the thread grooves matches the number of the thread knobs.

[0010] As a further description of the above technical solution: the number of the square pillars matches the number of the rectangular openings, and the size of the rectangular openings matches the size of the square pillars.

[0011] As a further description of the above technical solution: the inner wall of the box-closing sleeve is in contact with the side wall of the rectangular frame, and the box-closing sleeve is connected with the upper sand box.

[0012] The utility model has the following beneficial effects:

[0013] In the utility model, by moving the upper sand box and the lower sand box toward each other, the closing sleeve of the upper sand box is caused to be nested with the rectangular frame on the periphery of the lower sand box port, so that a plurality of square columns welded on the end faces of the rectangular frame respectively penetrate the corresponding rectangular openings and extend to the outside of the closing sleeve. At this time, the positioning block extends to the square column exposed on the outside of the closing sleeve, so that the positioning block is plugged into the positioning groove on the surface of the square column, forcing the threaded knob inserted on the surface of the protrusion to correspond to the threaded groove opened on the side wall of the upper sand box, and then the threaded knob is rotated to be threadedly connected with the threaded groove, so as to achieve the purpose of closing the upper sand box and the lower sand box. Compared with the prior art, a positioning block with a protrusion is adopted, and the effect of secondary positioning and locking is achieved in the form of plug-in positioning and threaded positioning, thereby ensuring the accuracy of closing the box and improving the production quality of castings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the box closing device for the sand box of the utility model;

[0015] Figure 2 This is a schematic diagram of the lower sand box structure of the sand box closing device of the utility model;

[0016] Figure 3 The utility model is a schematic diagram of the upper sand box structure of the sand box closing device.

[0017] Legend:

[0018] 1. Upper sand box; 2. Lower sand box; 3. Box sleeve; 4. Rectangular frame; 5. Square column; 6. Positioning block; 7. Threaded knob; 8. Bump; 9. Threaded groove; 10. Positioning groove; 11. Through hole; 12. Rectangular opening. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] According to an embodiment of the utility model, a flask closing device is provided.

[0021] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-3 As shown, according to the embodiment of the utility model, the closing device for the sand box includes an upper sand box 1 and a lower sand box 2. A closing sleeve 3 is welded at the port at the bottom of the upper sand box 1, and a plurality of rectangular openings 12 are opened on the surface of the closing sleeve 3. A lower sand box 2 is arranged below the upper sand box 1, and a rectangular frame 4 is welded on the periphery of the port at the top of the lower sand box 2, and a plurality of square columns 5 are welded on the end surface of the rectangular frame 4 of the lower sand box 2. The closing sleeve 3 is sleeved with the rectangular frame 4 of the lower sand box 2, and a plurality of square columns 5 respectively penetrate the plurality of rectangular openings 12 and extend to the outside of the closing sleeve 3. The surface of each square column 5 is opened. There is a positioning groove 10, and a through hole 11 is opened above the positioning groove 10 through the square column 5, a positioning block 6 is inserted in the positioning groove 10, and a convex block 8 is welded on the top surface of the positioning block 6, and a threaded knob 7 is inserted on the surface of the convex block 8, and the threaded knob 7 penetrates the square column 5 and is threadedly connected with the outer wall of the upper sand box 1, wherein the positioning block 6 is connected to the positioning groove 10 to realize the plug-in positioning after the box sleeve 3 and the rectangular frame 4 are sleeved, and the threaded knob 7 is threadedly connected to the outer wall of the upper sand box 1, thereby realizing the threaded positioning of the upper sand box 1 and the lower sand box 2, and ensuring the accuracy of the upper sand box 1 and the lower sand box 2;

[0022] In one embodiment, through holes 11 are provided on the surfaces of the square column 5 and the protrusion 8 corresponding to the threaded knob 7, and the centers of the through holes 11 of the square column 5 and the protrusion 8 are on the same straight line. The provision of the through holes 11 facilitates the insertion and installation of the threaded knob 7.

[0023] In one embodiment, one end of the positioning block 6 is in the shape of a locomotive, and the bottom surface of the positioning block 6 is in contact with the top surface of the box sleeve 3. The positioning block 6 with the locomotive-shaped structure facilitates smooth insertion of the positioning block 6 and the positioning groove 10, thereby achieving the purpose of preliminary insertion and positioning.

[0024] In one embodiment, a plurality of thread grooves 9 are provided on both sides of the upper sand box 1, and the number of the thread grooves 9 matches the number of the thread knobs 7. Through the setting of the thread grooves 9, on the one hand, it is easy to position the threads of the upper sand box 1 and the lower sand box 2, and on the other hand, it is convenient to lock the upper sand box 1 and the lower sand box 2.

[0025] In one embodiment, the number of several square columns 5 matches the number of several rectangular openings 12, and the size of the rectangular openings 12 is adapted to the size of the square columns 5. Through the arrangement of the rectangular openings 12, it is convenient for the square columns 5 to pass through the mold closing sleeve 3 to make way, which is beneficial to the positioning of the upper sand box 1 and the lower sand box 2.

[0026] In one embodiment, the inner wall of the mold closing sleeve 3 is in close contact with the side wall of the rectangular frame 4, and the mold closing sleeve 3 is communicated with the upper sand box 1, that is, there is no gap between the mold closing sleeve 3 and the rectangular frame 4 to ensure the tightness of the connection.

[0027] Working principle:

[0028] When in use, by moving the upper sand box 1 and the lower sand box 2 towards each other, the mold closing sleeve 3 of the upper sand box 1 is sleeved with the rectangular frame 4 outside the port of the lower sand box 2, so that several square columns 5 welded to the end face of the rectangular frame 4 respectively penetrate through the correspondingly opened rectangular openings 12 and extend to the outside of the mold closing sleeve 3. At this time, by the positioning block 6 extending towards the part of the square column 5 exposed outside the mold closing sleeve 3, the positioning block 6 is inserted into the positioning groove 10 on the surface of the square column 5, forcing the threaded knob 7 inserted through the convex block 8 to correspond to the threaded groove 9 opened on the side wall surface of the upper sand box 1, realizing the preliminary positioning of the upper sand box 1 and the lower sand box 2. Then, rotate the threaded knob 7 to make it threadedly connected with the threaded groove 9, perform secondary positioning on the upper sand box 1 and the lower sand box 2, and lock them, achieving the effect of accurately closing the upper sand box 1 and the lower sand box 2, so as to facilitate the casting and molding of subsequent castings.

[0029] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A flask closing device, comprising an upper flask (1) and a lower flask (2), characterized in that: A closing sleeve (3) is welded at the port at the bottom of the upper sand box (1), and a plurality of rectangular openings (12) are opened on the surface of the closing sleeve (3). A lower sand box (2) is arranged below the upper sand box (1), and a rectangular frame (4) is welded around the port at the top of the lower sand box (2), and a plurality of square columns (5) are welded on the end surface of the rectangular frame (4) of the lower sand box (2). The closing sleeve (3) is sleeved with the rectangular frame (4) of the lower sand box (2), and a plurality of the square columns (5) respectively penetrate through a plurality of A plurality of rectangular openings (12) extend to the outside of the box sleeve (3), a positioning groove (10) is provided on the surface of each square column (5), and a through hole (11) is provided above the positioning groove (10) and penetrates through the square column (5), a positioning block (6) is inserted in the positioning groove (10), and a convex block (8) is welded on the top surface of the positioning block (6), a threaded knob (7) is inserted on the surface of the convex block (8), and the threaded knob (7) penetrates through the square column (5) and is threadedly connected to the outer wall of the upper sand box (1).

2. The flask closing device according to claim 1, characterized in that: The surfaces of the square column (5) and the protrusion (8) are both provided with through holes (11) corresponding to the threaded knob (7), and the centers of the through holes (11) of the square column (5) and the protrusion (8) are on the same straight line.

3. The flask closing device according to claim 1, characterized in that: One end of the positioning block (6) is in the shape of a locomotive, and the bottom surface of the positioning block (6) is in contact with the top surface of the box-closing sleeve (3).

4. The flask closing device according to claim 1, characterized in that: A plurality of thread grooves (9) are provided on both the left and right sides of the upper sand box (1), and the number of the thread grooves (9) matches the number of the thread knobs (7).

5. The flask closing device according to claim 1, characterized in that: The number of the square pillars (5) matches the number of the rectangular openings (12), and the size of the rectangular openings (12) matches the size of the square pillars (5).

6. The flask closing device according to claim 1, characterized in that: The inner wall of the box closing sleeve (3) is in contact with the side wall of the rectangular frame (4), and the box closing sleeve (3) is connected to the upper sand box (1).

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