Ejection jig for resin abrasive disc

Abstract

The utility model relates to the technical field of abrasive disc production, in particular to a resin abrasive disc ejection jig. Comprising a lower supporting plate, a mold is arranged on the upper surface of the lower supporting plate, a plurality of cavities are formed in the mold in a rectangular array mode, abrasive discs adhere to the interiors of the cavities, a positioning protection plate is arranged on the upper surface of the mold, and a plurality of positioning grooves are formed in the positioning protection plate in a rectangular array mode. When the abrasive disc is demolded, the bottom plate is adjusted and locked at the position farthest from the lower supporting plate, the baffle is rotated to be in a horizontal state, at the moment, one end of the baffle extends out of the mounting groove to be in contact with the upper surface of the positioning protection plate, the baffle presses the positioning protection plate, and therefore the positioning protection plate is prevented from moving upwards; the positioning protection plate is prevented from impacting the mold so as to prolong the service life of the positioning protection plate, the position of the positioning protection plate is prevented from deviating in the demolding process, workers do not need to frequently correct the position of the positioning protection plate, and the demolding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding disc production, in particular to a resin grinding disc ejection jig. Background Art

[0002] With the development of industry, products in various industries are constantly updated. Grinding and polishing operations are required on products such as stone, glass, carbon fiber, and metal. The demand for grinding consumables is increasing. Resin grinding discs account for 75% of the grinding consumables field due to their simple production process and low cost. However, during the mass production of resin grinding discs, the physical properties of the material change due to thermal curing, making it difficult to demold the product.

[0003] An existing simple jig for demolding grinding discs is to stack the mold of the adhered grinding disc between the upper and lower plates, and the positions of the grinding discs on the two plates are both provided with through grooves. When demolding, the worker passes the ejector through the through groove on the upper plate to contact the grinding disc, and then uses the ejector to press the grinding disc downward, and push the grinding disc into the through groove on the lower plate to complete the demolding. When in use, this type of jig usually does not have a fixed structure between the plate and the mold, so that the worker can quickly replace the mold between the two plates and improve the demolding efficiency. However, if there is no fixation between the plate and the mold, the worker is likely to move the plate in the process of moving the ejector, causing a collision between the plate and the mold, shortening the service life of the plate. At the same time, when the plate collides with the mold, the position of the through groove will be offset. In order to ensure the smooth progress of the demolding work, the worker needs to correct the position of the plate, resulting in a decrease in demolding efficiency. In view of this, we have proposed a resin grinding disc ejection jig. Utility Model Content

[0004] The purpose of the utility model is to provide a resin grinding disc ejection jig to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, one of the purposes of the present invention is to provide a resin grinding disc ejection jig, comprising a lower support plate, the upper surface of the lower support plate is provided with a mold, a plurality of cavities are opened in a rectangular array on the mold, a grinding disc is adhered to the inside of the cavities, and a positioning guard plate is provided on the upper surface of the mold, a plurality of positioning grooves are opened in a rectangular array on the positioning guard plate, the positioning grooves correspond to the position of the grinding disc up and down, a contour ejection block is slidably provided inside one of the positioning grooves, four through holes are opened at positions corresponding to the positioning pins on the lower support plate, four through holes are opened at positions near the four corners of the positioning guard plate and the mold, the inner walls of the through holes are in sliding contact with the corresponding side walls of the positioning pins, a mounting groove is opened at the top of the positioning pin, two baffles are symmetrically rotated inside the mounting groove, and a rotating mechanism is provided at the bottom of the lower support plate, the rotating mechanism is used to drive the baffle to rotate, and when the baffle rotates to a horizontal state, the other end of the baffle rotates to the outside of the mounting groove and is in close contact with the upper surface of the positioning guard plate.

[0006] As a further improvement of the present technical solution, a plurality of grooves are provided in a rectangular array on the top of the lower support plate, and the positions of the grooves and the grinding discs correspond to each other up and down. A plurality of protrusions are fixedly provided on the top of the grinding disc, and a plurality of protrusions are fixedly connected to the bottom of the contoured ejection block, and the protrusions are in close contact with the upper surfaces of the corresponding protrusions.

[0007] As a further improvement of the present technical solution, the rotating mechanism includes a base plate arranged under the lower support plate, and four extension rods are fixedly connected to the positions on the upper surface of the base plate corresponding to the positioning pins. The upper ends of the extension rods pass through the corresponding lower side walls of the positioning pins and extend to the interior of the mounting groove. Two connecting rods are symmetrically hinged at positions near the upper ends of the side walls of the extension rods. The connecting rods are arranged at an angle, and the other ends of the connecting rods are hinged to the corresponding baffles.

[0008] As a further improvement of the present technical solution, the outer sliding sleeve of the extension rod is provided with a spring, and the two ends of the spring are respectively fixed on the upper surface of the base plate and the lower surface of the lower support plate.

[0009] As a further improvement of the present technical solution, an elliptical roller is rotatably provided at the bottom of the lower support plate, and the arc surface of the elliptical roller contacts the upper surface of the base plate. When one end of the baffle is in close contact with the upper surface of the positioning guard plate, the two ends of the arc surface of the elliptical roller are farthest away from each other and contact the upper surface of the base plate and the lower surface of the lower support plate respectively.

[0010] As a further improvement of the present technical solution, one end of the elliptical roller shaft is fixedly connected to a worm gear, and one side of the lower support plate is rotatably provided with a worm, and the worm gear is meshed with the worm gear.

[0011] As a further improvement of the present technical solution, two windows are symmetrically opened on the bottom plate, and a padding block is provided inside the window. The padding block is fixedly provided on the lower surface of the lower support plate, and the bottom of the padding block is located below the bottom plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The resin grinding disc ejection jig adjusts and locks the bottom plate at the position farthest from the lower support plate when demolding the grinding disc, so that the baffle is rotated to a horizontal state. At this time, one end of the baffle extends out of the mounting slot and contacts the upper surface of the positioning guard plate, so that the baffle presses the positioning guard plate, thereby blocking the upward movement of the positioning guard plate and preventing the positioning guard plate from hitting the mold to extend the service life of the positioning guard plate. In addition, the position of the positioning guard plate is prevented from shifting during the demolding process, and workers do not need to frequently correct the position of the positioning guard plate, thereby improving the demolding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is one of the overall structural diagrams of the utility model;

[0015] Figure 2 It is an exploded view of the overall structure of the utility model;

[0016] Figure 3 This is a schematic structural diagram of the contoured ejection block of the present invention;

[0017] Figure 4 This is the second schematic diagram of the overall structure of the utility model;

[0018] Figure 5 For the utility model Figure 4 A magnified view of the structure at point A;

[0019] Figure 6 It is a cross-sectional view of the overall structure of the utility model;

[0020] Figure 7 For the utility model Figure 6 A magnified view of the structure at point B.

[0021] The meaning of each number in the figure is:

[0022] 1. Lower support plate; 11. Groove; 12. Heightening block;

[0023] 2. Positioning pin; 21. Mounting slot; 22. Baffle;

[0024] 3. Mould; 31. Grinding disc;

[0025] 4. Positioning guard plate; 41. Positioning groove;

[0026] 5. Contour ejector block; 51. Protrusion;

[0027] 6. Rotating mechanism; 61. Bottom plate; 611. Window; 62. Elliptical roller; 63. Worm gear; 64. Worm; 65. Extension rod; 66. Spring; 67. Connecting rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Example 1

[0030] See also Figure 1-Figure 3As shown, one of the purposes of this embodiment is to provide a resin grinding disc ejection jig, including a lower support plate 1, a mold 3 is provided on the upper surface of the lower support plate 1, a plurality of cavities are opened in a rectangular array on the mold 3, a grinding disc 31 is adhered inside the cavity, the grinding disc 31 is formed by solidifying the molten resin inside the cavity of the mold 3, and there is adhesion between the edge of the grinding disc 31 and the inner wall of the cavity, a positioning guard plate 4 is provided on the upper surface of the mold 3, a plurality of positioning grooves 41 are opened in a rectangular array on the positioning guard plate 4, a contoured ejection block 5 is slidingly set inside one of the positioning grooves 41, a plurality of grooves 11 are opened in a rectangular array on the top of the lower support plate 1, four positioning pins 2 are fixedly connected to the positions near the four corners of the lower support plate 1, four through holes are opened on the positioning guard plate 4 and the positions corresponding to the positioning pins 2, the inner walls of the through holes are in sliding contact with the corresponding side walls of the positioning pins 2, and the through holes and the positioning pins 2 cooperate to fix the mold 3 and the positioning guard plate 4 just above the lower support plate 1, so that the positions of the grooves 11 and the grinding disc 31 correspond to each other up and down, and the grooves 11 are The grinding disc 31 provides space for downward movement, and the positioning groove 41 corresponds to the position of the grinding disc 31 in the upper and lower parts. The top of the grinding disc 31 is fixedly provided with a plurality of protrusions, and the bottom of the profiling ejection block 5 is fixedly connected with a plurality of protrusions 51. The protrusions 51 are in close contact with the upper surfaces of the corresponding protrusions. When the profiling ejection block 5 is pressed downward so that the protrusions 51 exert downward pressure on the grinding disc 31, the adhesion between the edge of the grinding disc 31 and the inner wall of the cavity will be broken due to the shear force, so that the grinding disc 31 is separated from the cavity and separated from the cavity. After the cavity is separated, the grinding disc 31 falls into the inside of the groove 11, completing the demoulding work of the grinding disc 31. Similarly, the contoured ejection blocks 5 are placed one by one in the remaining positioning grooves 41 and pressed downward to quickly demould the remaining grinding discs 31 on the mold 3. Then the positioning guard plate 4 is removed from the mold 3, and the mold 3 is removed from the lower support plate 1. The demoulded grinding disc 31 can be taken out from the inside of the corresponding groove 11, thereby reducing the labor intensity of workers in demoulding the grinding disc 31 and improving the production efficiency of the grinding disc 31.

[0031] When the worker takes the profiling ejection block 5 out of the interior of the positioning groove 41, the gap between the side wall of the profiling ejection block 5 and the inner wall of the positioning groove 41 is small, and the profiling ejection block 5 can easily cling to the inner wall of the positioning groove 41. Since the positioning guard plate 4 is thin and light, under the action of the friction between the profiling ejection block 5 and the inner wall of the positioning groove 41, the moving profiling ejection block 5 will drive the positioning guard plate 4 upward to a certain height. When the profiling ejection block 5 is out of contact with the inner wall of the positioning groove 41, the positioning guard plate 4 will fall under the action of gravity. The falling positioning guard plate 4 will collide with the mold 3, causing the positioning guard plate 4 and the positioning groove 41 to shift in position. When the position of the positioning groove 41 shifts, the worker presses the profiling ejection block 5 downward along the inner wall of the positioning groove 41, and the edge of the profiling ejection block 5 will contact the mold 3. , which makes the contoured ejection block 5 unable to eject the grinding disc 31 smoothly from the inside of the mold 3 cavity. Therefore, workers need to correct the positioning guard plate 4 in time after the position is offset. The correction process is time-consuming and labor-intensive, which reduces the demoulding efficiency. To solve this problem, a mounting groove 21 is opened on the top of the positioning pin 2. Two baffles 22 are symmetrically rotated inside the mounting groove 21. A rotating mechanism 6 is provided at the bottom of the lower support plate 1. The rotating mechanism 6 is used to drive the baffle 22 to rotate. When the baffle 22 rotates to a horizontal state, the other end of the baffle 22 rotates to the outside of the mounting groove 21 and is in close contact with the upper surface of the positioning guard plate 4. The baffle 22 blocks the positioning guard plate 4 from moving upward, thereby preventing the positioning guard plate 4 from colliding with the mold 3 and avoiding the position offset of the positioning guard plate 4.

[0032] The structure of the rotating mechanism 6 is detailed below. Figures 4 to 7 The rotating mechanism 6 includes a bottom plate 61 arranged below the lower support plate 1. Four extension rods 65 are fixedly connected to the position corresponding to the positioning pin 2 on the upper surface of the bottom plate 61. The upper end of the extension rod 65 passes through the lower side wall of the corresponding positioning pin 2 and extends to the inside of the mounting groove 21. The extension rod 65 is slidably arranged between the extension rod 65 and the positioning pin 2. Two connecting rods 67 are symmetrically hinged at the position near the upper end of the side wall of the extension rod 65. The connecting rod 67 is inclined. The other end of the connecting rod 67 is located at a low position. The other end of the connecting rod 67 is hinged on the corresponding baffle 22. By adjusting the distance between the bottom plate 61 and the lower support plate 1, the bottom plate 61 drives The four extension rods 65 move vertically, and the extension rod 65 drives one end of the connecting rod 67 to move vertically, so that the other end of the connecting rod 67 drives the corresponding baffle 22 to rotate. When the base plate 61 and the extension rod 65 move to the predetermined lowest position, the connecting rod 67 drives the baffle 22 to rotate to a horizontal state. The gap between the connecting rod 67, the extension rod 65 and the baffle 22 forms a triangle. At this time, locking the position of the base plate 61 and the extension rod 65 can lock the position of the baffle 22, so that the baffle 22 blocks the positioning guard plate 4 from moving upward, preventing the positioning guard plate 4 from colliding with the mold 3 and causing the positioning guard plate 4 to shift in position.

[0033] In order to adjust and lock the bottom plate 61 in a predetermined position, a spring 66 is provided on the outer sliding sleeve of the extension rod 65. The two ends of the spring 66 are respectively fixed on the upper surface of the bottom plate 61 and the lower surface of the lower support plate 1. The bottom of the lower support plate 1 is rotatably provided with an elliptical roller 62. The arc surface of the elliptical roller 62 contacts the upper surface of the bottom plate 61. One end of the rotating shaft of the elliptical roller 62 is fixedly connected with a worm gear 63. A worm 64 is rotatably provided on one side of the lower support plate 1. The worm 64 meshes with the worm gear 63. When the worm 64 is rotated, the meshing transmission of the worm 64 and the worm gear 63 drives the elliptical roller 62 to rotate. When the contact position between the bottom plate 61 and the elliptical roller 62 gradually moves away from the rotating shaft of the elliptical roller 62, the elliptical roller 62 pushes the bottom plate 61 to move vertically downward, and the spring 66 elastically stretches. When the bottom plate 61 When the contact position with the elliptical roller 62 gradually approaches the rotating shaft of the elliptical roller 62, the spring 66 rebounds and drives the bottom plate 61 to move vertically upward, thereby vertically adjusting the position of the bottom plate 61. When the elliptical roller 62 is rotated so that the two ends of the arc surface of the elliptical roller 62 are farthest away from each other and contact the upper surface of the bottom plate 61 and the lower surface of the lower support plate 1 respectively, the distance between the bottom plate 61 and the lower support plate 1 reaches the maximum, and the bottom plate 61 is at the predetermined lowest position. At this time, one end of the baffle 22 is in close contact with the upper surface of the positioning guard plate 4, and the worker stops rotating the worm 64 and limits the rotation of the elliptical roller 62 through the self-locking property between the worm 64 and the worm gear 63 to lock the position of the bottom plate 61 and the baffle 22, so that the baffle 22 can prevent the positioning guard plate 4 from moving upward, thereby preventing the positioning guard plate 4 from hitting the mold 3 and causing the positioning guard plate 4 to shift in position.

[0034] When it is necessary to remove the positioning guard plate 4 from the mold 3 and the mold 3 from the lower support plate 1, rotate the worm 64 to adjust the position of the elliptical roller 62 so that the distance between the position where the elliptical roller 62 contacts the bottom plate 61 and the rotating shaft is the shortest. At this time, the rebound spring 66 pulls the bottom plate 61 and the extension rod 65 to the highest point, and the extension rod 65 rotates the baffle 22 to be stored in the inside of the mounting groove 21 through the connecting rod 67. The through holes on the positioning guard plate 4 and the mold 3 can be removed from the outside of the positioning pin 2, and the positioning guard plate 4 and the mold 3 can be separated from the lower support plate 1, which is convenient for workers to take out the demolded grinding disc 31 from the inside of the groove 11 and assemble the mold 3 with the grinding disc 31 adhered to it for demolding.

[0035] In order to prevent the bottom plate 61 from touching the ground, so that when the worker uses the contoured ejection block 5 to press the grinding disc 31 downward, the lower support plate 1 applies downward pressure on the bottom plate 61, thereby shortening the service life of the rotating mechanism 6, two windows 611 are symmetrically opened on the bottom plate 61, and a padding block 12 is provided inside the window 611. The padding block 12 is fixedly set on the lower surface of the lower support plate 1, and the bottom of the padding block 12 is located below the bottom plate 61. By making the lower surface of the padding block 12 touch the ground, the lower support plate 1 can be firmly placed on the ground, and the bottom plate 61 will not be subjected to pressure when the worker performs the demolding work, so that the worm gear 63 and the worm 64 can play the effect of locking the position of the bottom plate 61 under low load, thereby extending the service life of the worm gear 63 and the worm 64.

[0036] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A resin grinding disc ejection jig, comprising a lower support plate (1), characterized in that: The upper surface of the lower support plate (1) is provided with a mold (3), a plurality of cavities are provided in a rectangular array on the mold (3), a grinding disc (31) is adhered inside the cavity, a positioning guard plate (4) is provided on the upper surface of the mold (3), a plurality of positioning grooves (41) are provided in a rectangular array on the positioning guard plate (4), the positioning grooves (41) correspond to the positions of the grinding disc (31) in the upper and lower directions, a contoured ejection block (5) is slidably provided inside one of the positioning grooves (41), four positioning pins (2) are fixedly connected to the positions near the four corners of the lower support plate (1), the positioning guard plate (4) and Four through holes are provided on the mold (3) at positions corresponding to the positioning pins (2), the inner walls of the through holes are in sliding contact with the corresponding side walls of the positioning pins (2), a mounting groove (21) is provided on the top of the positioning pins (2), two baffles (22) are symmetrically rotated inside the mounting groove (21), a rotating mechanism (6) is provided at the bottom of the lower support plate (1), the rotating mechanism (6) is used to drive the baffles (22) to rotate, and when the baffles (22) are rotated to a horizontal state, the other end of the baffles (22) rotates to the outside of the mounting groove (21) and is in close contact with the upper surface of the positioning guard plate (4).

2. The resin grinding disc ejection jig according to claim 1, characterized in that: The top of the lower support plate (1) is provided with a plurality of grooves (11) in a rectangular array, and the positions of the grooves (11) and the grinding disc (31) correspond to each other in an upper and lower direction. The top of the grinding disc (31) is fixedly provided with a plurality of protrusions, and the bottom of the contoured ejection block (5) is fixedly connected with a plurality of protrusions (51), and the protrusions (51) are in close contact with the upper surfaces of the corresponding protrusions.

3. The resin grinding disc ejection jig according to claim 1, characterized in that: The rotating mechanism (6) comprises a bottom plate (61) arranged below the lower support plate (1); four extension rods (65) are fixedly connected to the upper surface of the bottom plate (61) at positions corresponding to the positioning pins (2); the upper ends of the extension rods (65) pass through the lower side walls of the corresponding positioning pins (2) and extend to the interior of the mounting groove (21); two connecting rods (67) are symmetrically hinged to the side walls of the extension rods (65) near the upper ends; the connecting rods (67) are arranged in an inclined manner, and the other ends of the connecting rods (67) are hinged to the corresponding baffles (22).

4. The resin grinding disc ejection jig according to claim 3, characterized in that: The outer sliding sleeve of the extension rod (65) is provided with a spring (66), and the two ends of the spring (66) are respectively fixedly arranged on the upper surface of the bottom plate (61) and the lower surface of the lower support plate (1).

5. The resin grinding disc ejection jig according to claim 3, characterized in that: An elliptical roller (62) is rotatably provided at the bottom of the lower support plate (1), and the arc surface of the elliptical roller (62) contacts the upper surface of the bottom plate (61). When one end of the baffle (22) is in close contact with the upper surface of the positioning guard plate (4), the two ends of the arc surface of the elliptical roller (62) that are farthest apart contact the upper surface of the bottom plate (61) and the lower surface of the lower support plate (1), respectively.

6. The resin grinding disc ejection jig according to claim 5, characterized in that: One end of the rotating shaft of the elliptical roller (62) is fixedly connected to a worm gear (63), and one side of the lower support plate (1) is rotatably provided with a worm (64), and the worm gear (64) is meshed with the worm gear (63).

7. The resin grinding disc ejection jig according to claim 3, characterized in that: Two windows (611) are symmetrically provided on the bottom plate (61), and a padding block (12) is provided inside the window (611). The padding block (12) is fixedly provided on the lower surface of the lower support plate (1), and the bottom of the padding block (12) is located below the bottom plate (61).

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