A deburring device for injection molded parts of plastic packaging boxes

Abstract

The invention discloses a deburring device for injection molded parts of a plastic packaging box, relates to the technical field of deburring of plastic injection molded parts, and comprises a sanding belt deburring machine and a detection and winding mechanism for detecting the breakage of the sanding belt. The detection and winding mechanism also comprises a material receiving unit, which is arranged in two groups and is arranged on the top of a machine platform and on the surface of a sanding belt. The material receiving unit is used to wind up the broken sanding belt. A belt changing mechanism is arranged on the back side of the machine platform. The belt changing mechanism is arranged in a front section and a rear section, and the front section is located at the bottom of the machine platform, and the rear section is located at the back of the machine platform. The deburring device for injection molded parts of the plastic packaging box can detect the breakage of the sanding belt at the first time by using the detection unit, and secondly, the material receiving unit is used to realize the alternating work of winding the broken sanding belt, and at the same time, the belt changing mechanism can realize the function of replacing and extracting a new sanding belt body.

Description

Technical Field

[0001] The invention relates to the technical field of deburring plastic injection molded parts, in particular to a deburring device for injection molded parts of a plastic packaging box. Background Art

[0002] Plastic boxes are transparent folding boxes, cylinders, lid boxes, hand bags, hanging tags and other related plastic products made of PVC / PET / PP / PS and other materials. They can be printed with UV offset printing, silk screen printing, gold / silver hot stamping, frosting and other printing effects. Injection molding is a method of producing industrial products. Products usually use rubber injection molding and plastic injection molding.

[0003] After the injection molding of plastic packaging boxes, there are often more burrs on the corners or other parts, so a deburring device is needed. The belt sander is a common grinding equipment. It uses a belt as a grinding tool. By driving the rotation and friction of the belt, the burrs and unevenness on the plastic surface can be removed to improve the appearance and processing accuracy of the product. When the belt sander is working, the burrs on the workpiece surface are irregular. Long-term work will cause the belt surface to wear too much. At the same time, if the tension of the belt is too high, it will cause the belt to break during operation, which will cause the unfinished workpiece to stagnate. The existing belt replacement method requires going to a designated location to find a new belt, and then putting the new belt on the surface of the belt sander. This method greatly affects the processing efficiency of deburring plastic injection molded parts, and it will also cause the stagnant plastic parts to become irregular after deburring again.

[0004] Combining the above problems, we will find that it is difficult to avoid the above problems at the same time when using the existing deburring devices for injection molded parts of plastic packaging boxes on the market, and even if they can be solved, they need to be solved with the cooperation of external tools, thus failing to achieve the desired effect. Therefore, we propose a deburring device for injection molded parts of plastic packaging boxes. Summary of the invention

[0005] The object of the present invention is to provide a deburring device for injection molded parts of plastic packaging boxes to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a deburring device for injection molded parts of a plastic packaging box, characterized in that it includes a sanding belt deburring machine and a detection and winding mechanism for detecting the breakage of the sanding belt, the sanding belt deburring machine includes a machine table, a driven wheel and a tensioning wheel, the right side of the machine table is fixedly connected to a processing table, the left side of the machine table is fixedly connected to a driving motor, the output end of the driving motor is fixedly connected to a driving wheel, the front side of the driven wheel is movably connected to the back side of the machine table, and the number of driven wheels is two, and the two driven wheels are arranged on the back of the machine table in the same vertical plane, and a grinding belt is arranged on the back side of the machine table, and the grinding belt is sleeved on the surface of the driven wheel, the driving wheel and the tensioning wheel. The driven wheel, the driving wheel and the tensioning wheel are connected through a grinding belt transmission connection, one side of the top of the machine platform is fixedly connected to a frame, the top of the frame is fixedly connected to a servo motor 1, the output end of the servo motor 1 is fixedly connected to an adjusting screw, one side of the surface of the adjusting screw is threadedly connected to an adjusting screw sleeve, the front and back sides of the inner cavity of the adjusting screw sleeve are movably connected to sliding columns, the top and bottom ends of the sliding columns are fixed to the inside of the frame, the back side of the sliding column is movably connected to a connecting column, the back side of the connecting column is movably connected to the front side of the tensioning wheel, the back side of the machine platform is fixedly connected to a baffle, the number of the baffles is three, and the three baffles are respectively movably connected to the surfaces of the driven wheel and the driving wheel;

[0007] The detection and winding mechanism includes a detection unit, which is arranged inside the machine and located on the inner surface of the grinding belt, and is used to detect whether the grinding belt is broken;

[0008] The detection and winding mechanism also includes a material receiving unit, which is provided in two groups and is arranged on the top of the machine and on the surface of the grinding belt. The material receiving unit is used to wind up the broken grinding belt;

[0009] A belt changing mechanism is arranged on the back side of the machine platform. The belt changing mechanism is arranged with a front section and a rear section, and the front section is located at the bottom of the machine platform, and the rear section is located at the back of the machine platform. The belt changing mechanism is used to replace a new abrasive belt.

[0010] Preferably, the detection unit includes a detection shell, which is fixed to the inside of the machine platform, and the top of the inner cavity of the detection shell is fixedly connected to a reset spring 1, and the bottom of the reset spring 1 is fixedly connected to a sliding rod, the surface of the sliding rod is movably connected to the inside of the detection shell, and both sides of the bottom of the sliding rod are fixedly connected to trigger rods, and the bottoms of both sides of the inner wall of the detection shell are fixedly connected to pressure sensors, the bottom of the sliding rod penetrates to the bottom of the detection shell and is fixedly connected to a pressure wheel, the surface of the pressure wheel fits the surface of the grinding belt, and is arranged in the same horizontal state as the grinding belt.

[0011] Preferably, the material receiving unit includes a hydraulic cylinder, the bottom of the hydraulic cylinder is fixedly connected to the top of the machine platform, the output end of the hydraulic cylinder passes through the machine platform and is fixedly connected to a pushing frame, the front side of the pushing frame is fixedly connected to servo motor 2, and the output end of servo motor 2 is installed with a winding stop frame, the top and bottom of the back side of the winding stop frame are fixedly connected to a winding rod, and the winding rod is located on the surface of the grinding belt.

[0012] Preferably, the belt changing mechanism includes a base frame and a connecting frame, the base frame is fixed to the bottom of the machine platform, a servo motor three is fixedly connected to the front side of the base frame, the output end of the servo motor three passes through the base frame and is fixedly connected to an adjusting screw, a material changing plate is threadedly connected to the surface of the adjusting screw, the material changing plate is movably connected to the inside of the base frame, guide columns are movably connected on both sides of the bottom of the inner cavity of the material changing plate, the guide columns are fixed to the inside of the base frame, and a new sanding belt body is arranged on the front side of the material changing plate.

[0013] Preferably, the inner cavity of the material changing plate is provided with a groove, one side of the inner wall of the groove is fixedly connected to a support spring, one end of the support spring is fixedly connected to a sliding seat, the front side of the sliding seat is fixedly connected to an expansion plate, the surface of the expansion plate is tightly fitted with the inner surface of the new sanding belt body, side sliding grooves are provided on both sides of the inner wall of the groove, a side sliding block is movably connected inside the side sliding groove, and one side of the side sliding block is fixedly connected to one side of the sliding seat.

[0014] Preferably, the inner cavity of the connecting frame is movably connected with a rotating shaft, the surface of the rotating shaft is fixedly connected with a clamping cam, both sides of the clamping cam are fixedly connected with torsion springs, the torsion springs are movably connected to the surface of the rotating shaft, the other end of the torsion spring is fixedly connected to the interior of the connecting frame, a buffer groove is provided at the bottom of the inner cavity of the clamping cam, the interior of the buffer groove is movably connected with a roller, one side of the rotating shaft is fixedly connected with a rotating seat, the inner cavity of the rotating seat is provided with a positioning groove, and the front side of the material changing plate is fixedly connected with a pushing wheel, and the pushing wheel and the clamping cam are used in combination.

[0015] Preferably, the inner cavity of the material changing plate is fixedly connected to an outer rod, the bottom of the inner cavity of the outer rod is movably connected to the inner rod, one side of the top of the inner wall of the inner rod is fixedly connected to a return spring three, one end of the return spring three is fixedly connected to a connecting block, the bottom of the connecting block is fixedly connected to a positioning block, the bottom of the positioning block passes through the bottom of the inner rod, the surfaces of the connecting block and the positioning block are both movably connected to the inside of the outer rod and the inner rod, the positioning block is used in conjunction with the positioning groove, one side of the connecting block is fixedly connected to a connecting rod, and one side of the connecting rod is fixedly connected to a pushing block.

[0016] Preferably, a connecting seat is fixedly connected to the top of the left side of the inner wall of the outer rod, a pulley is movably connected to the right side of the inner cavity of the connecting seat, the surface of the pulley is movably connected to the inclined surface of the pushing block, the front and back sides of the pushing block are fixedly connected to the sliding block, the front and back sides of the inner wall of the inner rod are provided with vertical grooves, and the inside of the vertical grooves is movably connected to the surface of the sliding block.

[0017] Preferably, a sliding sleeve is fixedly connected to one side of the top of the inner rod, and a cross column is movably connected to the inside of the sliding sleeve. Both ends of the cross column are fixed to the inside of the outer rod, and a return spring 2 is sleeved on one side of the surface of the cross column. The left end of the return spring 2 is fixed to the inner wall of the outer rod, and the right end of the return spring 2 is fixed to the left side of the sliding sleeve.

[0018] Preferably, the belt changing mechanism further comprises an L-shaped frame and a fixing frame, wherein the number of the fixing frames is four and the upper and lower groups are arranged on the surface of the grinding sand belt, and the upper group of the fixing frames is fixed to the bottom of the machine platform, and the bottom of the lower group of the fixing frames is fixedly connected to a cross frame, the front side of the cross frame is fixed to the back side of the bottom frame, one side of the inner cavity of the fixing frame is movably connected to a limiting roller, the interior of the limiting roller is movably connected to a light rod, the light rod passes through the fixing frame and is movably connected to the interior of the fixing frame, the top of the light rod is fixedly connected to a return spring four, one end of the return spring four is fixed to the inner wall of the fixing frame, both ends of the light rod are fixedly connected to a transmission block, one side of the transmission block is fixedly connected to a magnet, the number of the magnets is multiple and they are arranged in two groups, the upper group of magnets is positive, and the lower group of magnets is negative, the back side of the L-shaped frame is fixed to the front side of the material changing plate, and one side of the L-shaped frame is movably connected to a moving wheel, and the moving wheel and the transmission block are used in conjunction with each other.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention utilizes a detection unit, which can cause a return spring to be compressed and deformed when the pressure wheel is subjected to the tension of the grinding belt. Under the deformation action of the return spring, the pressure wheel is tightly fitted to the surface of the grinding belt. At the same time, when the grinding belt breaks, the trigger rod will touch the pressure sensor, so that the break of the grinding belt can be detected at the first time.

[0021] The present invention utilizes a material receiving unit to wind up the broken grinding abrasive belt by rotating a winding rod. The winding rod arranged on the left is used for first-time winding, and the winding rod arranged on the right is used for winding up after replacing a new abrasive belt body to prevent the next break, thereby realizing alternating winding work.

[0022] The present invention utilizes a belt changing mechanism. After a new abrasive belt body is sleeved on the surfaces of a driven wheel and a driving wheel through a material changing plate, a pressing cam is pushed to rotate counterclockwise under the action of a driving wheel. When the pressing cam rotates counterclockwise to a vertical state, the middle part of the new abrasive belt body is pressed. At this time, the new abrasive belt body is in an "M" shape under the action of the pressing force and the expansion plate as a fulcrum, so that the expansion plate can be smoothly pulled out from one side of the new abrasive belt body, thereby realizing the function of replacing and pulling out the new abrasive belt body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a back view of the machine structure of the present invention;

[0025] Figure 3 It is a connection schematic diagram of the fixing frame structure of the present invention;

[0026] Figure 4 It is a connection schematic diagram of the frame structure of the present invention;

[0027] Figure 5 It is a cross-sectional view of the machine platform and the detection shell structure of the present invention;

[0028] Figure 6 It is a connection schematic diagram of the connection frame structure of the present invention;

[0029] Figure 7 It is a schematic diagram of the connection between the base frame and the material changing plate structure of the present invention;

[0030] Figure 8 It is a connection schematic diagram of the sliding seat structure of the present invention;

[0031] Fig. 9 It is a schematic diagram of the connection between the outer rod and the inner rod structure of the present invention;

[0032] Fig.10 It is a cross-sectional view of the outer rod and inner rod structure of the present invention;

[0033] Fig.11 For the present invention Fig.10 A local enlarged schematic diagram of the middle A;

[0034] Fig.12 It is a connection schematic diagram of the inner rod structure of the present invention;

[0035] Fig.13 This is a schematic diagram of the connection between the roller and the driven wheel after being pressed together.

[0036] In the figure: 1. Abrasive belt deburring machine; 11. Machine table; 12. Machine frame; 13. Driving motor; 14. Processing table; 15. Driven wheel; 16. Abrasive belt; 17. Driving wheel; 18. Connecting column; 19. Tensioning wheel; 110. Sliding column; 111. Adjusting screw sleeve; 112. Adjusting screw; 113. Servo motor 1; 114. Stop plate; 2. Detection and winding mechanism; 21. Detection unit; 2101. Detection shell; 2102. Position spring 1; 2103, sliding rod; 2104, trigger rod; 2105, pressure sensor; 2106, pressure wheel; 22, material receiving unit; 2201, hydraulic cylinder; 2202, servo motor 2; 2203, winding rod; 2204, winding stop frame; 2205, push frame; 3, belt changing mechanism; 31, bottom frame; 32, material changing plate; 33, connecting frame; 34, pressing cam; 35, torsion spring; 36, rotating shaft; 37, fixed Position slot; 38, rotating seat; 39, servo motor three; 310, adjusting screw; 311, guide column; 312, driving wheel; 313, outer rod; 314, expansion plate; 315, sliding seat; 316, new sanding belt body; 317, side slide groove; 318, groove; 319, side slide block; 320, vertical groove; 321, support spring; 322, inner rod; 323, positioning block; 324, horizontal column; 325, reset spring two; 32 6. Connecting rod; 327. Pushing block; 328. Sliding block; 329. Return spring three; 330. Connecting block; 331. Pulley; 332. Connecting seat; 333. Sliding sleeve; 334. Roller; 335. Fixed frame; 336. Return spring four; 337. Transmission block; 338. Magnet; 339. Light rod; 340. Limiting roller; 341. Buffer groove; 342. Moving wheel; 343. L-shaped frame; 344. Horizontal frame. DETAILED DESCRIPTION

[0037] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0038] Example 1: Please refer to Figure 1-Figure 13The present invention provides a technical solution: a deburring device for injection molded parts of a plastic packaging box, comprising an abrasive belt deburring machine 1 and a detection winding mechanism 2 for detecting abrasive belt breakage. The abrasive belt deburring machine 1 comprises a machine table 11, a driven wheel 15 and a tensioning wheel 19. A processing table 14 is fixedly connected to the right side of the machine table 11, a driving motor 13 is fixedly connected to the left side of the machine table 11, and a driving wheel 17 is fixedly connected to the output end of the driving motor 13. The front side of the driven wheel 15 is movably connected to the back side of the machine table 11, and the number of driven wheels 15 is two, and the two driven wheels 15 are arranged on the back of the machine table 11 in the same vertical plane. A grinding belt 16 is arranged on the back side of the machine table 11, and the grinding belt 16 is sleeved on the surfaces of the driven wheel 15, the driving wheel 17 and the tensioning wheel 19. The driven wheel 15, the driving wheel 17 and the tensioning wheel 19 are connected by the grinding belt 16.

[0039] One side of the top of the machine table 11 is fixedly connected to the frame 12, the top of the frame 12 is fixedly connected to a servo motor 113, the output end of the servo motor 113 is fixedly connected to an adjusting screw 112, the bottom end of the adjusting screw 112 is movably connected to the frame 12 through a bearing, one side of the surface of the adjusting screw 112 is threadedly connected to an adjusting screw sleeve 111, the front and back sides of the inner cavity of the adjusting screw sleeve 111 are movably connected to a sliding column 110, the sliding column 110 is fixed to one side of the frame 12, and the back side of the sliding column 110 is movably connected to a connecting column 18, which can be movably connected by a bearing. Then, the back side of the connecting column 18 is movably connected to the front side of the tensioning wheel 19, and a baffle plate 114 is fixedly connected to the back side of the machine table 11. The baffle plate 114 is movably connected to the surfaces of the driven wheel 15 and the driving wheel 17 respectively. Two sliding columns 110 are arranged inside the adjusting screw sleeve 111 to guide the moving position of the adjusting screw sleeve 111, thereby making the adjusting screw sleeve 111 more stable during the sliding process. Through the arrangement of a servo motor 113, the adjusting screw 112 can be driven to adjust the position of the connecting column 18, so that it is convenient to adjust the tension of the sanding belt.

[0040] The detection and winding mechanism 2 includes a detection unit 21, which is disposed inside the machine 11 and located on the inner surface of the grinding belt 16. The detection unit 21 is used to detect whether the grinding belt 16 is broken;

[0041] As a further limitation of the detection and winding mechanism 2 of the present invention, the detection unit 21 includes a detection shell 2101, the detection shell 2101 is fixed to the inside of the machine table 11, the top of the inner cavity of the detection shell 2101 is fixedly connected to a reset spring 2102, the bottom of the reset spring 2102 is fixedly connected to a sliding rod 2103, the surface of the sliding rod 2103 is movably connected to the inside of the detection shell 2101, both sides of the bottom of the sliding rod 2103 are fixedly connected to trigger rods 2104, the bottom of both sides of the inner wall of the detection shell 2101 are fixedly connected to pressure sensors 2105, and the bottom of the sliding rod 2103 penetrates to the detection shell 2 A pressure wheel 2106 is fixedly connected to the bottom of 101, and the surface of the pressure wheel 2106 fits with the surface of the grinding belt 16 and is arranged in the same horizontal state as the grinding belt 16. Through the setting of the reset spring 2102, when the grinding belt 16 is tensioned, the pressure wheel 2106 is compressed to store energy for the tension, so that the trigger rod 2104 can easily touch the pressure sensor 2105 in the first time. The setting of the pressure wheel 2106 prevents the sliding rod 2103 from directly contacting the grinding belt 16, thereby reducing the friction force, protecting the grinding belt 16, and preventing the grinding belt 16 from excessive wear.

[0042] As a further limitation of the detection and reeling mechanism 2 of the present invention, the detection and reeling mechanism 2 also includes a receiving unit 22, which is provided in two groups and is provided on the top of the machine table 11 and on the surface of the abrasive belt 16, and the receiving unit 22 is used to reel the abrasive belt 16 after breaking;

[0043] The material receiving unit 22 includes a hydraulic cylinder 2201, the bottom of the hydraulic cylinder 2201 is fixedly connected to the top of the machine table 11, the output end of the hydraulic cylinder 2201 passes through the machine table 11 and is fixedly connected to a push frame 2205, the front side of the push frame 2205 is fixedly connected to a servo motor 2202, the output end of the servo motor 2202 is installed with a winding stop frame 2204, the servo motor 2202 and the winding stop frame 2204 can be connected by bolts, the top and bottom of the back side of the winding stop frame 2204 are fixedly connected to a winding rod 2203, the winding rod 2203 is located on the surface of the grinding belt 16, and the position of the winding rod 2203 on one side is lower than the position of the winding rod 2203 on the other side, as shown in the attached Figure 4 As shown, the winding rod 2203 arranged on the left side is used for winding at the first time, and the winding rod 2203 arranged on the right side is used for winding after replacing the new abrasive belt body 316 to prevent the next breakage, thereby realizing the alternating winding work. The winding stop frame 2204 is connected with the output end of the servo motor 2202 by bolts, and the winding stop frame 2204 can be conveniently removed from the output end of the servo motor 2202 to take out the wound abrasive belt.

[0044] The specific implementation of this embodiment is as follows: when the sanding belt machine is ready to work, the adjusting screw 112 is driven to rotate through the operation of the servo motor 113, and the adjusting screw sleeve 111 is prompted to move upward under the threaded connection between the adjusting screw 112 and the adjusting screw sleeve 111, and the adjusting screw sleeve 111 slides on the surface of the sliding column 110, and the movement of the adjusting screw sleeve 111 drives the connecting column 18 to move, and the movement of the connecting column 18 drives the tensioning wheel 19 to slowly rise, and the rising of the tensioning wheel 19 can adjust the tension of the sanding belt 16, so that the sanding belt 16 becomes taut, and then the normal operation of the sanding belt machine can be achieved, and at the same time, when the sanding belt 16 is tensioned, the pressure wheel 2106 is moved upward, and the movement of the pressure wheel 2106 drives the sliding rod 2103 to slide inside the detection shell 2101, and the movement of the sliding rod 2103 causes the reset spring 1 2102 is compressed and deformed, and then the pressure wheel 2106 can be attached to the surface of the grinding belt 16 to reach the preparatory state before work, and then the driving motor 13 drives the active wheel 17 to rotate, and the rotation of the active wheel 17 makes the grinding belt 16 drive the tensioning wheel 19 to rotate on the back side of the connecting column 18, and at the same time, the driven wheel 15 rotates on the back of the machine table 11, and the plastic injection molded parts are deburred through the processing table 14 under the rotation of the grinding belt 16. When the grinding belt 16 breaks, the reset spring 2102 loses its strength to prompt the sliding rod 2103 to move downward, and the movement of the sliding rod 2103 drives the trigger rod 2104 to touch the pressure sensor 2105, and the pressure sensor 2105 receives the pressure signal. At this time, the pressure sensor 2105 transmits the signal to the external PLC controller and the PLC controller adopts Mitsubishi PLC FX1N-60MT-001, the PLC controller controls the drive motor 13 to stop working, and controls the servo motor 113 to rotate in the opposite direction. At this time, the tension wheel 19 moves downward to break away from the contact with the grinding belt 16, and then the PLC controller controls the servo motor 2202 to drive the winding stop frame 2204 to rotate, and the winding rod 2203 is driven to rotate by the rotation of the winding stop frame 2204. The grinding belt 16 is wound by the rotation of the winding rod 2203. After the winding is completed, The wound abrasive belt is pushed downward by the hydraulic cylinder 2201 on the right, and the abrasive belt is removed from between the winding stop frame 2204 and the servo motor 2202. At this time, the hydraulic cylinder 2201 on the left pulls the pushing frame 2205 to move upward, and the pushing frame 2205 slides inside the machine 11. The movement of the pushing frame 2205 drives the winding rod 2203 to move to the initial position of the winding rod 2203 on the right, so as to prevent the winding process from being performed after the next break, thereby realizing the alternating work of winding.

[0045] Example 2: Please refer to Figure 1-Figure 13The present invention provides a technical solution: a deburring device for injection molded parts of a plastic packaging box. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. A belt changing mechanism 3 is arranged on the back side of a machine table 11. The belt changing mechanism 3 is arranged with a front section and a rear section, and the front section is located at the bottom of the machine table 11, and the rear section is located at the back of the machine table 11. The belt changing mechanism 3 is used to replace a new sanding belt.

[0046] As a further limitation of the belt changing mechanism 3 of the present invention, the belt changing mechanism 3 includes a base frame 31 and a connecting frame 33. The base frame 31 is fixed to the bottom of the machine platform 11. The front side of the base frame 31 is fixedly connected to a servo motor 39. The output end of the servo motor 39 passes through the base frame 31 and is fixedly connected to an adjusting screw rod 310. The surface of the adjusting screw rod 310 is threadedly connected to a material changing plate 32. The material changing plate 32 is movably connected to the inside of the base frame 31. A screw nut is provided inside the material changing plate 32. The material changing plate 32 is threadedly connected to the adjusting screw rod 310 through the screw nut. The details will not be explained here. The screw nut has a specific structure, and one end of the screw rod 310 is movably connected to the inside of the base frame 31 through a bearing. Both sides of the bottom of the inner cavity of the material changing plate 32 are movably connected with guide columns 311, and the guide columns 311 are fixed to the inside of the base frame 31. A new sanding belt body 316 is arranged on the front side of the material changing plate 32. Through the setting of the guide columns 311, the overall moving position of the material changing plate 32 is guided, thereby improving the stability of the material changing plate 32 during movement. The setting of the material changing plate 32 provides a new platform for the new sanding belt body 316, thereby improving the efficiency of replacing the sanding belt.

[0047] The inner cavity of the material changing plate 32 is provided with a groove 318, and the number of the grooves 318 is three, and they correspond to the positions of the two driven wheels 15 and the driving wheel 17 respectively. A support spring 321 is fixedly connected to one side of the inner wall of the groove 318, and one end of the support spring 321 is fixedly connected to the sliding seat 315. The front side of the sliding seat 315 is fixedly connected to the expansion plate 314. The expansion plate 314 is hollow inside, and the inner ring diameter of each expansion plate 314 is the same as the outer ring diameter of the driven wheel 15 and the driving wheel 17. The surface of the expansion plate 314 is tightly fitted with the inner surface of the new sand belt body 316. Side sliding grooves 317 are provided on both sides of the inner wall of the groove 318, and the side sliding grooves 317 are movably connected inside The slider 319, one side of the side slider 319 is fixedly connected to one side of the sliding seat 315. The side sliding groove 317 is provided to reduce the friction between the side slider 319 and the groove 318, thereby improving the stability of the sliding seat 315 when sliding in the groove 318. At the same time, the support spring 321 is provided to tighten the new sand belt body 316, so that the position of the new sand belt body 316 can be adjusted. At the same time, the expansion plate 314 is provided to support the inner circle of the new sand belt body 316. At the same time, the hollow structure is provided to provide a space for the clamping cam 34, so that the clamping cam 34 can rotate to a vertical state so that the new sand belt body 316 can be tilted, which is convenient for subsequent extraction.

[0048] The connecting frame 33 is fixed to one side of the machine table 11. The number of the connecting frames 33 is three, corresponding to the positions of the two driven wheels 15 and the driving wheel 17 respectively. At the same time, the connecting frame 33 located on the surface of the driving wheel 17 is fixed to one side of the bottom frame 31. The inner cavity of the connecting frame 33 is movably connected with a rotating shaft 36. The surface of the rotating shaft 36 is fixedly connected with a clamping cam 34. Both sides of the clamping cam 34 are fixedly connected with a torsion spring 35. The torsion spring 35 is movably connected to the surface of the rotating shaft 36. The other end of the torsion spring 35 is fixedly connected to the inside of the connecting frame 33. A buffer groove 341 is provided at the bottom of the inner cavity of the clamping cam 34. The inside of the buffer groove 341 is movably connected to the inner surface of the torsion spring 35. There is a roller 334, one side of the rotating shaft 36 is fixedly connected to a rotating seat 38, the inner cavity of the rotating seat 38 is provided with a positioning groove 37, the front side of the material changing plate 32 is fixedly connected to a driving wheel 312, the driving wheel 312 and the clamping cam 34 are used in conjunction with each other, and the driving wheel 312 and the clamping cam 34 are arranged in the same horizontal plane, and the position of the clamping cam 34 is supported by the setting of the connecting frame 33, so that the clamping cam 34 can rotate smoothly, and the setting of the torsion spring 35 causes the torsion spring 35 to deform after the clamping cam 34 is rotated under force, and the deformation can be restored when the clamping cam 34 loses its strength, so that the clamping cam 34 can resume its attachment Figure 5The state shown is an initial unstressed state, and the buffer groove 341 provided inside the clamping cam 34 provides sliding space for the roller 334, so that when the roller 334 contacts the new abrasive belt body 316, it can play a buffering role. The positioning groove 37 is provided inside the rotating seat 38, so that the positioning block 323 can be inserted therein, thereby achieving the effect of positioning the clamping cam 34 after rotation. The setting of the roller 334 reduces the friction between the clamping cam 34 and the new abrasive belt body 316, thereby preventing the clamping cam 34 from damaging the new abrasive belt body 316 when it is clamped.

[0049] The inner cavity of the material exchange plate 32 is fixedly connected to the outer rod 313, and the bottom of the inner cavity of the outer rod 313 is movably connected to the inner rod 322. One side of the top of the inner wall of the inner rod 322 is fixedly connected to a return spring 329, and one end of the return spring 329 is fixedly connected to a connecting block 330. The bottom of the connecting block 330 is fixedly connected to a positioning block 323. The bottom of the positioning block 323 penetrates to the bottom of the inner rod 322. The surfaces of the connecting block 330 and the positioning block 323 are both movably connected to the inner parts of the outer rod 313 and the inner rod 322. The positioning block 323 is used in conjunction with the positioning groove 37. One side of the connecting block 330 is fixed A connecting rod 326 is connected, and a pushing block 327 is fixedly connected to one side of the connecting rod 326. The pushing block 327 passes through the top of the inner rod 322. At the same time, a through groove used in conjunction with the pushing block 327 is opened on the top of the outer rod 313. Through the setting of the return spring three 329, a downward force can be given to the connecting block 330, so that the positioning block 323 can be smoothly inserted into the inside of the positioning groove 37. Through the setting of the connecting rod 326, the connecting block 330 and the pushing block 327 can be connected, so that when the pushing block 327 moves upward, it can drive the connecting rod 326 to move.

[0050] A connecting seat 332 is fixedly connected to the top of the left side of the inner wall of the outer rod 313, and a pulley 331 is movably connected to the right side of the inner cavity of the connecting seat 332. The surface of the pulley 331 is movably connected to the inclined surface of the pushing block 327. The front and back sides of the pushing block 327 are fixedly connected to the sliding block 328. The front and back sides of the inner wall of the inner rod 322 are provided with vertical grooves 320. The interior of the vertical grooves 320 is movably connected to the surface of the sliding block 328. Through the setting of the pulley 331, the friction between the connecting seat 332 and the pushing block 327 is reduced, so that the pushing block 327 can move upward smoothly. The setting of the vertical groove 320 guides the moving position of the sliding block 328, so that the pushing block 327 can stably slide inside the inner rod 322.

[0051] The top of the inner rod 322 is fixedly connected with a sliding sleeve 333 on one side, and the sliding sleeve 333 is movably connected with a cross column 324 inside. Both ends of the cross column 324 are fixed to the inside of the outer rod 313, and a return spring 2 325 is sleeved on one side of the surface of the cross column 324. The left end of the return spring 2 325 is fixed to the inner wall of the outer rod 313, and the right end of the return spring 2 325 is fixed to the left side of the sliding sleeve 333. Through the setting of the return spring 2 325, when the outer rod 313 moves, the cross column 324 will move, and the return spring 2 325 will be compressed and deformed under the obstruction of the sliding sleeve 333. When the return spring 2 325 recovers its deformation, it can prompt the inner rod 322 to be smoothly retracted into the inside of the outer rod 313, thereby realizing the return function.

[0052] The belt changing mechanism 3 also includes an L-shaped frame 343 and a fixed frame 335. There are four fixed frames 335, which are arranged in an upper and lower group on the surface of the grinding belt 16. The upper fixed frame 335 is fixed to the bottom of the machine table 11, and the bottom of the lower fixed frame 335 is fixedly connected with a cross frame 344. The front side of the cross frame 344 is fixed to the back side of the bottom frame 31. One side of the inner cavity of the fixed frame 335 is movably connected with a limiting roller 340. The inside of the limiting roller 340 is movably connected with a light rod 339. The light rod 339 passes through the fixed frame 335 and is movably connected to the inside of the fixed frame 335. The top of the light rod 339 is fixedly connected with a return spring 336. One end of the return spring 336 is fixed to the inner wall of the fixed frame 335. Both ends of the light rod 339 are fixedly connected with a transmission block 337. One side of the transmission block 337 is fixedly connected with a magnet 33 8. There are multiple magnets 338, and they are arranged in two groups, the upper group of magnets 338 is the positive pole, and the lower group of magnets 338 is the negative pole. The back side of the L-shaped frame 343 is fixed to the front side of the material changing plate 32, and one side of the L-shaped frame 343 is movably connected with a moving wheel 342. The moving wheel 342 and the transmission block 337 are used together. Through the setting of the limiting roller 340, the grinding belt 16 can be pressed to avoid splashing after the grinding belt 16 breaks. At the same time, under the action of the inclined surface of the transmission block 337, the moving wheel 342 pushes it to expand outward, thereby ensuring the normal operation of the belt change. At the same time, the setting of the magnet 338 can adsorb and fix the closed state of the transmission block 337, further ensuring that the position of the limiting roller 340 is fixed, so that the limiting roller 340 can fit the surface of the grinding belt 16.

[0053] The specific implementation of this embodiment is as follows: the new abrasive belt body 316 is inserted into the surface of the expansion plate 314 in advance, and the expansion plate 314 will drive the sliding seat 315 to move inside the groove 318, and the movement of the sliding seat 315 drives the side slider 319 to slide inside the side slide groove 317, and the movement of the sliding seat 315 causes the support spring 321 to be compressed and deformed until the new abrasive belt body 316 is completely inserted into the surface of the expansion plate 314, at which time the support spring 321 recovers its deformation to prop up the position of the new abrasive belt body 316. After the above-mentioned grinding belt 16 breaks, the PLC controller controls the servo motor 3 39 to work, and the servo motor 3 39 drives the adjusting screw rod 310 to rotate inside the base frame 31, and the adjusting screw rod 310 is adjusted to rotate inside the base frame 31. The threaded connection between 310 and the material changing plate 32 causes the material changing plate 32 to move forward, and the material changing plate 32 slides inside the guide column 311, and the movement of the material changing plate 32 drives the expansion plate 314 and the new sanding belt body 316 to move, and at the same time, the material changing plate 32 drives the pushing wheel 312 and the outer rod 313 to move. When the expansion plate 314 contacts the surface of the driven wheel 15 and the driving wheel 17, the pushing wheel 312 contacts the clamping cam 34 at this time. With the movement of the pushing wheel 312, the clamping cam 34 drives the rotating shaft 36 to rotate inside the connecting frame 33. The rotation of the clamping cam 34 causes the torsion spring 35 to deform, and at the same time, the rotation of the rotating shaft 36 drives the rotating seat 38 to rotate. When the clamping cam 34 is pushed, it is about to rotate to the driven wheel 15. When the axis is in a vertical state, the inclined surface of the positioning block 323 contacts the surface of the rotating seat 38. Under the action of the inclined surface, the positioning block 323 will prompt the connecting block 330 to move upward, and the movement of the connecting block 330 will drive the reset spring 329 to deform. When the clamping cam 34 is pushed and rotated to a vertical state, the positioning block 323 will recover the deformation of the reset spring 329 and snap into the inside of the positioning groove 37, so as to position the clamping cam 34 in the vertical state. At the same time, the clamping cam 34 drives the roller 334 to clamp the new abrasive belt body 316, and the roller 334 slides in the buffer groove 341. When the expansion plate 314 is set to be hollow, when the clamping cam 34 presses the new abrasive belt body 316, the expansion plate 3 14 provides a fulcrum to make the new abrasive belt body 316 present an "M" shape. Prior to this, the expansion plate 314 is completely inserted into the surface of the driven wheel 15 and the driving wheel 17, and the new abrasive belt body 316 is also completely located at the outer ring of the driven wheel 15 and the driving wheel 17. At the same time, when the material changing plate 32 moves forward, the material changing plate 32 will also drive the L-shaped frame 343 to move, and the movement of the L-shaped frame 343 drives the moving wheel 342 to move. When the moving wheel 342 contacts the transmission block 337, the transmission block 337 will move outward, and the transmission block 337 drives the light rod 339 to slide inside the fixed frame 335. The movement of the light rod 339 will compress and deform the return spring 336, and the movement of the transmission block 337 will separate the two magnets 338.The movement of the polished rod 339 drives the limiting roller 340 to detach from the surface of the grinding belt 16, and then the reverse operation of the servo motor 39 causes the material changing plate 32 to move toward the back. Since the positioning block 323 is inserted into the positioning groove 37, the movement of the material changing plate 32 drives the outer rod 313 to move toward the back side, and the outer rod 313 slides toward the back side on the surface of the inner rod 322, and the inner rod 322 does not move under the action of the positioning block 323 being inserted into the positioning groove 37. The movement of the outer rod 313 causes the cross column 32 to move. When the outer rod 313 moves, the connecting seat 332 and the pulley 331 move to the back side, and the distance that the connecting seat 332 and the pulley 331 move to the back side is to ensure that the material changing plate 32 drives the expansion plate 314 to be separated from the inner surface of the new sand belt body 316 first. When the pulley 331 contacts the inclined surface of the pushing block 327, the pushing block 327 is forced to drive the sliding block 328 to move upward inside the vertical groove 320. The movement of the push block 327 drives the connecting rod 326 to move, and the connecting rod 326 drives the connecting block 330 and the positioning block 323 to move until the positioning block 323 is disengaged from the inside of the positioning groove 37, thereby realizing the delayed unlocking function, and then the inner rod 322 is retracted into the inside of the outer rod 313 under the recovery deformation of the return spring 2 325. At the same time, the movement of the material changing plate 32 drives the expansion plate 314 to move. At this time, the expansion plate 314 is completely pulled out from the surface of the driven wheel 15 and the driving wheel 17. , and the new abrasive belt body 316 is located on the surface of the driven wheel 15 and the driving wheel 17. When the reset spring 336 recovers its deformation, the limiting roller 340 moves toward the surface of the new abrasive belt body 316 until the limiting roller 340 fits the surface of the new abrasive belt body 316 and presses it. Then, the magnet 338 magnetically absorbs the limiting roller 340 to locate the position after the fit. At the same time, after the rotating seat 38 loses the clamping connection, the torsion spring 35 recovers its deformation, so that the torsion spring 35 drives the rotating shaft 36 to rotate inside the connecting frame 33 until it rotates to the attachment. Figure 5 In the initial state shown, the roller 334 is out of contact with the new abrasive belt body 316, and then the servo motor 113 operates to make the tensioning wheel 19 rise, and the new abrasive belt body 316 fits on the surfaces of the driven wheel 15, the driving wheel 17 and the tensioning wheel 19 under the action of the tensioning wheel 19. The tensioning wheel 19 adjusts the tension of the new abrasive belt body 316 again, and the baffle 114 is used to block the position of the new abrasive belt body 316 to prevent the new abrasive belt body 316 from detaching from the surfaces of the driven wheel 15 and the driving wheel 17.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A deburring device for injection molded parts of plastic packaging boxes, characterized in that: It comprises an abrasive belt deburring machine (1) and a detection and winding mechanism (2) for detecting abrasive belt breakage; The abrasive belt deburring machine (1) comprises a machine table (11), a driven wheel (15) and a tensioning wheel (19); the right side of the machine table (11) is fixedly connected to a processing table (14); the left side of the machine table (11) is fixedly connected to a driving motor (13); the output end of the driving motor (13) is fixedly connected to a driving wheel (17); the front side of the driven wheel (15) is movably connected to the back side of the machine table (11); and the number of driven wheels (15) is The two driven wheels (15) are arranged in the same vertical plane on the back of the machine platform (11). A grinding belt (16) is arranged on the back side of the machine platform (11). The grinding belt (16) is sleeved on the surfaces of the driven wheel (15), the driving wheel (17) and the tensioning wheel (19). The driven wheel (15), the driving wheel (17) and the tensioning wheel (19) are connected by the grinding belt (16). ) is fixedly connected to a frame (12) on one side of the top, a servo motor (113) is fixedly connected to the top of the frame (12), an output end of the servo motor (113) is fixedly connected to an adjusting screw (112), a side of the surface of the adjusting screw (112) is threadedly connected to an adjusting screw sleeve (111), the front side and the back side of the inner cavity of the adjusting screw sleeve (111) are both movably connected to a sliding column (110), the top and the bottom ends of the sliding column (110) are both fixed to the inside of the frame (12), the back side of the sliding column (110) is movably connected to a connecting column (18), the back side of the connecting column (18) is movably connected to the front side of the tensioning wheel (19), the back side of the machine platform (11) is fixedly connected to a baffle (114), the number of the baffles (114) is three, and the three baffles (114) are respectively movably connected to the surfaces of the driven wheel (15) and the driving wheel (17); The detection and reeling mechanism (2) comprises a detection unit (21), wherein the detection unit (21) is arranged inside the machine platform (11) and located on the inner surface of the grinding belt (16), and the detection unit (21) is used to detect whether the grinding belt (16) is broken; The detection and rewinding mechanism (2) further comprises a material receiving unit (22), wherein the material receiving unit (22) is provided in two groups and is arranged on the top of the machine table (11) and on the surface of the grinding belt (16), and the material receiving unit (22) is used to reel the broken grinding belt (16); The material receiving unit (22) comprises a hydraulic cylinder (2201), the bottom of the hydraulic cylinder (2201) is fixedly connected to the top of the machine platform (11), the output end of the hydraulic cylinder (2201) passes through the machine platform (11) and is fixedly connected to a pushing frame (2205), the front side of the pushing frame (2205) is fixedly connected to a servo motor 2 (2202), the output end of the servo motor 2 (2202) is equipped with a winding stop frame (2204), the top and bottom of the back side of the winding stop frame (2204) are fixedly connected to a winding rod (2203), and the winding rod (2203) is located on the surface of the grinding belt (16); A belt changing mechanism (3) is arranged on the back side of the machine platform (11). The belt changing mechanism (3) is arranged with a front section and a rear section, wherein the front section is located at the bottom of the machine platform (11) and the rear section is located at the back of the machine platform (11). The belt changing mechanism (3) is used to replace a new sanding belt.

2. A deburring device for injection molded parts of a plastic packaging box according to claim 1, characterized in that: The detection unit (21) comprises a detection shell (2101), wherein the detection shell (2101) is fixed inside the machine platform (11), the top of the inner cavity of the detection shell (2101) is fixedly connected to a reset spring (2102), the bottom of the reset spring (2102) is fixedly connected to a sliding rod (2103), the surface of the sliding rod (2103) is movably connected to the inside of the detection shell (2101), both sides of the bottom of the sliding rod (2103) are fixedly connected to trigger rods (2104), the bottom of both sides of the inner wall of the detection shell (2101) are fixedly connected to pressure sensors (2105), the bottom of the sliding rod (2103) penetrates to the bottom of the detection shell (2101) and is fixedly connected to a pressure wheel (2106), the surface of the pressure wheel (2106) is in contact with the surface of the grinding belt (16), and is arranged in the same horizontal state as the grinding belt (16).

3. A deburring device for injection molded parts of a plastic packaging box according to claim 1, characterized in that: The belt changing mechanism (3) comprises a base frame (31) and a connecting frame (33); the base frame (31) is fixed to the bottom of the machine platform (11); a servo motor three (39) is fixedly connected to the front side of the base frame (31); the output end of the servo motor three (39) passes through the base frame (31) and is fixedly connected to an adjusting screw rod (310); a material changing plate (32) is threadedly connected to the surface of the adjusting screw rod (310); the material changing plate (32) is movably connected to the inside of the base frame (31); guide columns (311) are movably connected to both sides of the bottom of the inner cavity of the material changing plate (32); the guide columns (311) are fixed to the inside of the base frame (31); a new sanding belt body (316) is arranged on the front side of the material changing plate (32); and the connecting frame (33) is fixed to one side of the machine platform (11).

4. A deburring device for injection molded parts of a plastic packaging box according to claim 3, characterized in that: The inner cavity of the material exchange plate (32) is provided with a groove (318), and the number of the grooves (318) is three. A support spring (321) is fixedly connected to one side of the inner wall of the groove (318), and one end of the support spring (321) is fixedly connected to a sliding seat (315). The front side of the sliding seat (315) is fixedly connected to an expansion plate (314), and the surface of the expansion plate (314) is tightly fitted with the inner surface of the new sanding belt body (316). Side sliding grooves (317) are provided on both sides of the inner wall of the groove (318), and a side sliding block (319) is movably connected inside the side sliding groove (317), and one side of the side sliding block (319) is fixedly connected to one side of the sliding seat (315).

5. The deburring device for injection molded parts of a plastic packaging box according to claim 3, characterized in that: The inner cavity of the connecting frame (33) is movably connected to a rotating shaft (36), and a clamping cam (34) is fixedly connected to the surface of the rotating shaft (36). Both sides of the clamping cam (34) are fixedly connected to torsion springs (35), and the torsion springs (35) are movably connected to the surface of the rotating shaft (36). The other end of the torsion spring (35) is fixedly connected to the inside of the connecting frame (33). A buffer groove (341) is provided at the bottom of the inner cavity of the clamping cam (34), and a roller (334) is movably connected inside the buffer groove (341). A rotating seat (38) is fixedly connected to one side of the rotating shaft (36), and a positioning groove (37) is provided in the inner cavity of the rotating seat (38). A driving wheel (312) is fixedly connected to the front side of the material changing plate (32), and the driving wheel (312) and the clamping cam (34) are used in conjunction with each other.

6. A deburring device for injection molded parts of a plastic packaging box according to claim 3, characterized in that: The inner cavity of the material exchange plate (32) is fixedly connected to an outer rod (313), and the bottom of the inner cavity of the outer rod (313) is movably connected to an inner rod (322). A return spring (329) is fixedly connected to one side of the top of the inner wall of the inner rod (322), and one end of the return spring (329) is fixedly connected to a connecting block (330). The bottom of the connecting block (330) is fixedly connected to a positioning block (323), and the bottom of the positioning block (323) penetrates to the bottom of the inner rod (322). The surfaces of the connecting block (330) and the positioning block (323) are both movably connected to the inside of the outer rod (313) and the inner rod (322). The positioning block (323) is used in conjunction with the positioning groove (37), and one side of the connecting block (330) is fixedly connected to a connecting rod (326), and one side of the connecting rod (326) is fixedly connected to a pushing block (327).

7. A deburring device for injection molded parts of a plastic packaging box according to claim 6, characterized in that: A connecting seat (332) is fixedly connected to the top of one side of the inner wall of the outer rod (313), a pulley (331) is movably connected to one side of the inner cavity of the connecting seat (332), the pulley (331) is used in conjunction with a pushing block (327), the front and back sides of the pushing block (327) are fixedly connected to a sliding block (328), the front and back sides of the inner wall of the inner rod (322) are provided with vertical grooves (320), the interior of the vertical groove (320) is movably connected to the surface of the sliding block (328).

8. The deburring device for injection molded parts of a plastic packaging box according to claim 6, characterized in that: A sliding sleeve (333) is fixedly connected to one side of the top of the inner rod (322), and a cross column (324) is movably connected inside the sliding sleeve (333). Both ends of the cross column (324) are fixed inside the outer rod (313). A second return spring (325) is sleeved on one side of the surface of the cross column (324), and the left end of the second return spring (325) is fixed to the inner wall of the outer rod (313), and the right end of the second return spring (325) is fixed to the left side of the sliding sleeve (333).

9. A deburring device for injection molded parts of a plastic packaging box according to claim 1, characterized in that: The belt changing mechanism (3) further comprises an L-shaped frame (343) and a fixed frame (335), wherein the number of the fixed frames (335) is four and the fixed frames (335) are arranged in an upper and lower group on the surface of the grinding belt (16), and the upper group of the fixed frames (335) is fixed to the bottom of the machine platform (11), and the bottom of the lower group of the fixed frames (335) is fixedly connected with a cross frame (344), the front side of the cross frame (344) is fixed to the back side of the bottom frame (31), one side of the inner cavity of the fixed frame (335) is movably connected with a limiting roller (340), the interior of the limiting roller (340) is movably connected with a light rod (339), and both ends of the light rod (339) pass through the fixed frame (335) and are movably connected to the interior of the fixed frame (335), The top of the optical rod (339) is fixedly connected with a return spring four (336), one end of which is fixed to the inner wall of the fixed frame (335), and both ends of the optical rod (339) are fixedly connected with a transmission block (337), one side of the transmission block (337) is fixedly connected with a magnet (338), the number of the magnets (338) is multiple, and they are arranged in two groups, the upper group of magnets (338) is positive, and the lower group of magnets (338) is negative, the back side of the L-shaped frame (343) is fixed to the front side of the material exchange plate (32), and one side of the L-shaped frame (343) is movably connected with a moving wheel (342), and the moving wheel (342) and the transmission block (337) are used in conjunction with each other.

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