Automatic cutting and injection molding device for automobile steering wheel connecting belt

Abstract

The invention relates to the field of automobile steering wheel connecting belts, and in particular to an automatic cutting and injection molding device for automobile steering wheel connecting belts, comprising a control box, a mounting bracket, an injection molding box, a bracket plate, a shearing mechanism, a controller, a heating wire, a connecting pipe, an upper cover, a placement plate and an injection molding plate; the invention can solve the following problems existing in the prior art in the process of automatic cutting and injection molding of automobile steering wheel connecting belts: a large number of burrs are formed at the closing position of the mold during the injection molding process; the burrs need to be manually trimmed after the injection molding is completed, and the connecting belt needs to be manually trimmed after the burrs are trimmed; the invention can avoid directly generating bubbles in the plastic process, thereby affecting the product quality; the invention uses a shearing mechanism to cut off the burrs of the connecting belt during the transmission process; the invention can also grind the cutting position of the connecting belt during the cutting process through the shearing mechanism, thereby greatly improving the production quality of the connecting belt.

Description

Technical Field

[0001] The invention relates to the technical field of automobile steering wheel connecting belts, in particular to an automatic cutting and injection molding device for automobile steering wheel connecting belts. Background Art

[0002] The car steering wheel connecting belt is an important wiring harness that connects the steering wheel and the electrical equipment on the steering column. The steering wheel connecting belt is a key component of the passive safety of the car, which significantly improves the driver's control over the vehicle. When manufacturing the steering wheel connecting belt, the excess material on the steering wheel connecting belt needs to be cut off. At present, the cutting of the excess material is usually carried out after the product is removed from the injection molding machine, which adds an extra processing step, occupies manpower and has low work efficiency. Using a cutting device to cut the product directly on the mold is easy to damage the mold and requires manual operation, and the work efficiency is still not high.

[0003] In the prior art, when producing steering wheel connecting straps, it is necessary to first put the injection molding raw materials into the corresponding heating tube to dissolve them, and then inject the raw materials into the mold. During the injection molding process, a large number of burrs will be formed at the closing position of the mold. Subsequently, after the injection molding is completed, the burrs need to be manually trimmed. After trimming the burrs, the connecting strap needs to be manually cut. Therefore, the prior art lacks a device that can perform injection molding, burr removal and cutting at the same time. Summary of the invention

[0004] In order to solve the above problems, the present invention provides an automatic cutting and injection molding device for a car steering wheel connecting belt, comprising a control chassis, two mounting brackets are installed at the bottom of the control chassis, an injection molding box is connected to the bottom of the mounting bracket, two bracket plates are arranged on one side of the injection molding box, and a shearing mechanism is installed between the two bracket plates;

[0005] A controller is installed on the upper end of the control box, a heating wire is installed on the inner wall of the control box, a connecting pipe for connecting to the inside of the control box is installed on the bottom of the control box, an upper cover is connected to the bottom of the connecting pipe, a placement plate is rotatably installed in the middle of the injection molding box, and an injection molding plate is installed on the upper end of the placement plate.

[0006] Preferably, two accommodating grooves are provided on the upper end of the injection molding plate, and injection molding grooves are provided at both ends of the accommodating groove along the length direction. Multiple hydraulic cylinders are installed between the upper end of the upper cover and the control chassis, multiple positioning rods are installed at the lower end of the upper cover, and positioning grooves corresponding to the positioning rods are provided on the upper end of the injection molding plate.

[0007] Preferably, a drive motor is installed in the injection molding box, a mounting plate is sleeved on the outer wall of the output shaft of the drive motor, a control button is installed on the side wall of the injection molding box, and the control button, the drive motor and the hydraulic pump are all electrically connected to the controller.

[0008] Preferably, a through groove is opened in the middle of the placement plate, and a plurality of exhaust pipes connected to the injection molding grooves are connected to the side of the injection molding plate close to the axis of the placement plate. An exhaust pump is installed at the bottom of the injection molding box, and the exhaust pipe passes through the through groove at one end away from the injection molding groove and is connected to the exhaust pump.

[0009] Preferably, a plurality of transmission shafts are rotatably connected between the two bracket plates, a conveyor belt is sleeved on the outer walls of the plurality of transmission shafts, a guide plate arranged along its length direction is installed on the outer wall of the conveyor belt, a limiting plate is installed on the opposite side of any one bracket plate to the other bracket plate, one end of the limiting plate is gradually inclined away from the injection molding box, and the limiting plate is located at the upper end of the conveyor belt.

[0010] Preferably, a linkage shaft is rotatably connected between the two bracket plates, the transmission shaft and the linkage shaft are connected by belt transmission, a limiting wheel is sleeved on the outer wall of the linkage shaft, the limiting wheel is located on the side of the limiting plate away from the injection molding box, and the limiting wheel is located above the conveyor belt, an arc groove is opened on the outer wall of the limiting wheel for the connecting belt to pass through, a servo motor is installed on the back side of any one bracket plate and the other bracket plate through a motor seat, and the output shaft of the servo motor is connected to the transmission shaft.

[0011] Preferably, the shearing mechanism includes two vertically arranged sliding grooves opened on opposite sides of the two bracket plates, the sliding groove is located on the side of the limiting wheel away from the injection molding box, a sliding block is slidably connected in the sliding groove, the bottom of the sliding block is semicircular, and gate knives are connected to opposite sides of the two sliding blocks.

[0012] Preferably, the shearing mechanism also includes a cross bar that is slidably connected to the two sliding grooves, the cross bar is located above the gate knife, an extrusion spring is connected between the cross bar and the gate knife, an articulated rod is rotatably connected to the upper end of the cross bar, a rotating shaft is rotatably connected to any one of the bracket plates, the rotating shaft and its adjacent transmission shaft are connected by a belt drive, a rotating disk located between the two bracket plates is sleeved on the outer wall of the rotating shaft, the articulated rod is hinged to the rotating disk at one end away from the cross bar, and the hinge between the articulated rod and the rotating disk is located at a point where the rotating disk is away from the center of the circle.

[0013] Preferably, a linkage groove is provided at the bottom of the sliding groove, the width of the upper end of the linkage groove gradually converges toward the middle, a trigger spring is installed at the bottom of the linkage groove, connecting rods are installed at both ends of the bottom length direction of the cross bar, and two blocks are rotatably connected to the bottom of the connecting rod. Trigger grooves are provided on opposite sides of the two blocks, which are gradually inclined from bottom to top, and the two blocks are located below the knife gate.

[0014] Preferably, an accommodating groove is provided on opposite sides of the two sliding grooves, a protrusion is slidably connected in the accommodating groove, and a return spring is connected between the protrusion and the accommodating groove.

[0015] In summary, this application includes the following beneficial technical effects:

[0016] 1. The present invention uses an air pump to evacuate air in the injection molding tank through an air evacuation pipe, so that a negative pressure state is formed in the injection molding tank, and then the molten plastic is quickly injected into the injection molding tank through a connecting pipe. Since the injection molding tank is in a negative pressure, bubbles in the plastic after directly injecting the plastic into the injection molding tank are avoided, which affects the product quality.

[0017] 2. The present invention uses the gap between the limiting plate and the guide plate to ensure that the length direction of the connecting belt is flush with the conveying direction of the conveyor belt after the connecting belt passes through, and there is no need for manual stacking to affect production efficiency. In addition, automatic material discharge can be achieved through the cooperation between the limiting wheel and the conveyor belt, so that the connecting belt is equidistantly conveyed to the shearing mechanism, which is convenient for the subsequent shearing of burrs on the connecting belt and ensures the quality of subsequent shearing.

[0018] 3. The present invention triggers the spring to reset, and drives the sliding block and the gate knife to move upward quickly, and the extrusion spring shrinks adaptively, so as to avoid the gate knife blocking the transmission of the connecting belt after cutting the connecting belt, and the connecting belt is blocked and tilted, affecting the subsequent cutting quality. In addition, the rotating disk will drive the gate knife to cut the connecting belt every time it rotates one circle, and there is no need for manual cutting after injection molding, which greatly improves production efficiency and saves manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a schematic diagram of the structure between the control box and the injection molding box of the present invention.

[0022] Figure 3 The present invention Figure 2 A partial enlarged view of point A.

[0023] Figure 4 It is a structural schematic diagram of the upper cover of the present invention.

[0024] Figure 5 It is a structural schematic diagram of the bracket plate of the present invention.

[0025] Figure 6 It is a first structural schematic diagram of the shearing mechanism of the present invention.

[0026] Figure 7 The present invention Figure 6 A partial enlarged view of point B.

[0027] Figure 8 It is a second structural schematic diagram of the shearing mechanism of the present invention.

[0028] Fig. 9 It is a schematic diagram of the knife structure of the present invention.

[0029] In the figure, 1, control box; 11, controller; 12, connecting pipe; 13, upper cover; 2, mounting bracket; 3, injection molding box; 31, placement plate; 311, pouring groove; 312, injection molding groove; 313, hydraulic cylinder; 314, positioning rod; 315, positioning groove; 316, driving motor; 317, control button; 318, through groove; 319, exhaust pipe; 310, exhaust pump; 32, injection molding plate; 4, bracket plate; 41, transmission shaft; 42, conveyor belt; 43, guide plate; 4 4. Limit plate; 45. Linkage shaft; 46. Limit wheel; 47. Arc groove; 48. Servo motor; 5. Shearing mechanism; 51. Sliding groove; 52. Sliding block; 53. Gate knife; 531. Grinding plate; 532. Support rod; 54. Cross bar; 55. Extrusion spring; 56. Articulated rod; 57. Rotating shaft; 58. Rotating disk; 59. Linkage groove; 60. Trigger spring; 61. Connecting rod; 62. Block; 63. Trigger groove; 64. Accommodating groove; 65. Bump; 66. Reset spring. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-Figure 9 Embodiments of the present invention are described in detail.

[0031] The embodiment of the present application discloses an automatic cutting and injection molding device for a car steering wheel connecting belt. It should be noted that the automatic cutting and injection molding device of the present application is mainly used in the process of automatic cutting and injection molding of the car steering wheel connecting belt. In terms of technical effect, it can avoid the presence of bubbles in the plastic after directly injecting the plastic into the injection molding groove 312, thereby affecting the product quality; especially during automatic cutting and injection molding, the gap between the limit plate 44 and the guide plate 43 can be passed through during the transmission of the connecting belt so that the length direction of the connecting belt is flush with the transmission direction of the conveyor belt 42 after the connecting belt passes through, without the need for manual stacking to affect production efficiency; further, the rotating disk 58 will drive the gate knife 53 to cut the connecting belt every time it rotates one circle, without the need for manual cutting after injection molding, thereby greatly improving production efficiency and saving manpower. Embodiment 1:

[0032] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in order to complete the injection molding of the connecting belt and automatically cut the injection-molded connecting belt, the present embodiment provides an automatic cutting and injection molding device for a car steering wheel connecting belt, including a control chassis 1, two mounting brackets 2 are installed at the bottom of the control chassis 1, an injection molding box 3 is connected to the bottom of the mounting bracket 2, two bracket plates 4 are arranged on one side of the injection molding box 3, a shearing mechanism 5 is installed between the two bracket plates 4, a controller 11 is installed at the upper end of the control chassis 1, a heating wire (not shown in the figure) is installed on the inner wall of the control chassis 1, a connecting pipe 12 for connecting to the inside of the control chassis 1 is installed at the bottom of the control chassis 1, an upper cover 13 is connected to the bottom of the connecting pipe 12, a placement plate 31 is rotatably installed in the middle of the injection molding box 3, and an injection molding plate 32 is installed on the upper end of the placement plate 31.

[0033] In the specific implementation process, plastic particles are put into the control chassis 1, and then the plastic particles are heated by the heating wire, and then the connecting belt is placed in the injection molding plate 32, and then the placement plate 31 is rotated to move the injection molding plate 32 to the bottom of the upper cover 13, and then the upper cover 13 is moved downward to close the injection molding plate 32, and then the molten plastic is injected from the connecting tube 12 between the upper cover 13 and the injection molding plate 32, and the plastic solidifies in the upper cover 13 and the injection molding plate 32. The upper cover 13 is opened, the injection-molded connecting belt is taken out, and the connecting belt is moved to the bottom of the shearing mechanism 5, and the shearing mechanism 5 cuts the side of the injection-molded connecting belt to remove the burrs generated during injection molding.

[0034] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in order to achieve rapid injection molding of the connecting belt, based on this, in this embodiment, two pouring grooves 311 are opened at the upper end of the injection plate 32, and injection grooves 312 are opened at both ends of the pouring groove 311 along the length direction. A plurality of hydraulic cylinders 313 are installed between the upper end of the upper cover 13 and the control chassis 1, and a plurality of positioning rods 314 are installed at the lower end of the upper cover 13. A positioning groove 315 corresponding to the positioning rod 314 is opened at the upper end of the injection plate 32.

[0035] Furthermore, in the present embodiment, a driving motor 316 is installed in the injection molding box 3, the placement plate 31 is sleeved on the outer wall of the output shaft of the driving motor 316, and a control button 317 is installed on the side wall of the injection molding box 3. The control button 317, the driving motor 316 and the hydraulic pump are all electrically connected to the controller 11; a through groove 318 is opened in the middle of the placement plate 31, and a plurality of exhaust pipes 319 connected to the injection molding groove 312 are connected to the side of the injection molding plate 32 close to the axis of the placement plate 31; an exhaust pump 310 is installed at the bottom of the injection molding box 3, and the exhaust pipe 319 passes through the through groove 318 at one end away from the injection molding groove 312 and is connected to the exhaust pump 310.

[0036] In the specific implementation process, the connecting belt is placed in the injection groove 311, and then the metal sheet is placed in the injection groove 312, and the control button 317 is started. The control button 317 transmits a signal to the controller 11, and the controller 11 controls the drive motor 316 to start, and the drive motor 316 rotates 180° and drives the placement plate 31 to rotate synchronously through the output shaft, and the placement plate 31 drives the injection molding plate 32 to rotate synchronously, so that the injection molding plate 32 rotates to the bottom of the upper sealing plate, and then the controller 11 controls the hydraulic cylinder 313 to start, and the telescopic end of the hydraulic cylinder 313 drives the upper sealing plate to move downward and docks with the positioning rod 314 and the positioning groove 315, so that the upper sealing plate is aligned with the injection molding plate 32, and fits each other so that the upper sealing plate and the injection molding plate 32 are close to each other. The vacuum pump 310 is started to evacuate the injection molding groove 312 through the vacuum pipe 319, so that a negative pressure state is formed in the injection molding groove 312, and then the molten plastic is quickly injected into the injection molding groove 312 through the connecting pipe 12. Because the injection molding groove 312 is under negative pressure, bubbles in the plastic after directly injecting the plastic into the injection molding groove 312 are avoided, which affects the product quality. After the injection molding is completed, the controller 11 controls the telescopic end of the hydraulic cylinder 313 to contract and drive the upper sealing plate to move upward, and then drives the motor 316 to rotate 180 degrees again. At this time, the plastic cools and solidifies, and the injection-molded connecting belt is taken out and placed on the shearing mechanism 5, thereby completing the automatic injection molding of the connecting belt, which greatly improves the work efficiency.

[0037] Reference Figure 5 As shown, in order to realize automatic arrangement and transmission of the connecting belt without manual arrangement, based on this, in the present embodiment, a plurality of transmission shafts 41 are rotatably connected between the two bracket plates 4, and a conveyor belt 42 is sleeved on the outer wall of the plurality of transmission shafts 41. A guide plate 43 arranged along its length direction is installed on the outer wall of the conveyor belt 42. A limiting plate 44 is installed on the opposite side of any bracket plate 4 and the other bracket plate 4, and one end of the limiting plate 44 is gradually inclined away from the injection molding box 3, and the limiting plate 44 is located at the upper end of the conveyor belt 42.

[0038] Furthermore, in the present embodiment, a linkage shaft 45 is rotatably connected between the two bracket plates 4, the transmission shaft 41 and the linkage shaft 45 are connected via a belt transmission, a limiting wheel 46 is sleeved on the outer wall of the linkage shaft 45, the limiting wheel 46 is located on the side of the limiting plate 44 away from the injection molding box 3, and the limiting wheel 46 is located above the conveyor belt 42, an arc groove 47 is opened on the outer wall of the limiting wheel 46 for the connection belt to pass through, a servo motor 48 is installed on the back side of any one bracket plate 4 and the other bracket plate 4 through a motor seat, and the output shaft of the servo motor 48 is connected to the transmission shaft 41.

[0039] In the specific implementation process, after the injection molding of the connecting belt is completed, the connecting belt is thrown to the upper end of the conveyor belt 42, and then the servo motor 48 is started. The output shaft of the servo motor 48 drives the transmission shaft 41 to rotate, and the transmission shaft 41 drives the conveyor belt 42 to rotate synchronously. The conveyor belt 42 drives the connecting belt at its upper end to move away from the injection molding box 3. When the connecting belt moves to the side of the limit plate 44, the connecting belt gradually moves along the inclined surface of the limit plate 44 to the side close to the guide plate 43, and through the gap between the limit plate 44 and the guide plate 43, the connecting belt makes the length direction of the connecting belt flush with the conveying direction of the conveyor belt 42 after passing through, and there is no need for manual stacking to affect production efficiency.

[0040] In addition, during the rotation of the transmission shaft 41, the transmission shaft 41 rotates synchronously with the limit wheel 46 driven by the conveyor belt 42, so that when the connecting belt is transmitted to the limit wheel 46, when the side of the limit wheel 46 with the arc groove 47 has not rotated to the bottom, the bottom of the limit wheel 46 is in contact with the upper end of the conveyor belt 42, so that the connecting belt cannot be transmitted forward; when the side of the limit wheel 46 with the arc groove 47 rotates to the bottom, a gap is formed between the limit wheel 46 and the conveyor belt 42, and then the connecting belt continues to move away from the injection molding box 3, and when a connecting belt passes through the arc groove 47, the limit wheel 46 is in contact with the conveyor belt 42 again, and the arc groove 47 rotates to the upper end; thereby, automatic discharge is realized, so that the connecting belt is equidistantly transmitted to the shearing mechanism 5, which is convenient for the subsequent shearing of burrs on the connecting belt, thereby ensuring the quality of subsequent shearing.

[0041] Reference Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, in order to be able to automatically shear the burrs of the injection-molded connecting belt after injection molding, based on this, in this embodiment, the shearing mechanism 5 includes two vertically arranged sliding grooves 51 opened on the opposite sides of the two bracket plates 4, and the sliding groove 51 is located on the side of the limiting wheel 46 away from the injection molding box 3. A sliding block 52 is slidably connected in the sliding groove 51, and the bottom of the sliding block 52 is semicircular. Gate knives 53 are connected to the opposite sides of the two sliding blocks 52.

[0042] Furthermore, in the present embodiment, the shearing mechanism 5 comprises a cross bar 54 which is slidably connected in two sliding grooves 51, the cross bar 54 is located above the gate knife 53, an extrusion spring 55 is connected between the cross bar 54 and the gate knife 53, an upper end of the cross bar 54 is rotatably connected to a hinged rod 56, a rotating shaft 57 is rotatably connected to any one of the bracket plates 4, the rotating shaft 57 and the adjacent transmission shaft 41 are connected by a belt drive, a rotating disk 58 located between the two bracket plates 4 is sleeved on the outer wall of the rotating shaft 57, the hinged rod 56 is hinged to the rotating disk 58 at one end away from the cross bar 54, and the hinged part between the hinged rod 56 and the rotating disk 58 is located at a part of the rotating disk 58 away from the center of the circle.

[0043] Furthermore, in the present embodiment, a linkage groove 59 is provided at the bottom of the sliding groove 51, the width of the upper end of the linkage groove 59 gradually converges toward the middle, a trigger spring 60 is installed at the bottom of the linkage groove 59, connecting rods 61 are installed at both ends of the bottom length direction of the cross bar 54, and two blocks 62 are rotatably connected to the bottom of the connecting rod 61, and trigger grooves 63 gradually inclined from bottom to top to both sides are provided on the opposite sides of the two blocks 62, and the two blocks 62 are located below the knife 53; accommodating grooves 64 are provided on the opposite sides of the two sliding grooves 51, and a protrusion 65 is slidably connected in the accommodating groove 64, and a reset spring 66 is connected between the protrusion 65 and the accommodating groove 64.

[0044] In the initial state, the two blocks 62 are in a merged state and are located in the sliding groove 51. When the block 62 is located in the linkage groove 59 and opens, the block 62 rises above the trigger spring 60 and then gradually merges toward the middle along the upper inclined surface of the linkage groove 59.

[0045] It should be noted that the extrusion spring 55 always applies an elastic force to the gate knife 53 toward the side away from the cross bar 54, so that the gate knife 53 can move downward quickly under the elastic force of the extrusion spring 55, and the descending frequency of the gate knife 53 is the same as the frequency of the connecting belt transmitted by the limiting wheel 46, so that when the gate knife 53 descends, the connecting belt is transmitted to the bottom of the gate knife 53 through the transmission belt, and the trigger spring 60 always applies an upward elastic force to the block 62, so that after the trigger spring 60 loses the limit of the block 62, it can push the gate knife 53 to move upward quickly, and the reset spring 66 always applies an elastic force to the protrusion 65 toward the side away from the accommodating groove 64, so that after the sliding block 52 is squeezed into the accommodating groove 64, the protrusion 65 is reset under the elastic force of the reset spring 66.

[0046] During the specific implementation process, the transmission shaft 41 rotates, thereby driving the rotating shaft 57 and the rotating disk 58 to rotate. The rotating disk 58 drives the articulated rod 56 to rotate circumferentially. When the rotating disk 58 drives the articulated rod 56 to rotate circumferentially and the articulated rod 56 moves downward, the cross bar 54 slides downward along the articulated rod 56 under the limitation of the sliding groove 51. The cross bar 54 drives the gate knife 53 and the sliding block 52 to slide downward along the sliding groove 51 through the extrusion spring 55. When the sliding block 52 slides to the top of the protrusion 65, the sliding block 52 cannot slide downward due to the obstruction of the protrusion 65, and the cross bar 54 continues to move downward to compress the extrusion spring 55.

[0047] At the same time, during this process, the cross bar 54 drives the block 62 to descend synchronously through the connecting rod 61. When the block 62 contacts the trigger spring 60, the block 62 squeezes the trigger spring 60 to make the trigger spring 60 contract. When the extrusion spring 55 is compressed to the limit, the protrusion 65 contracts into the accommodating groove 64 under the extrusion of the sliding block 52, and the reset spring 66 contracts adaptively. The sliding block 52 and the knife 53 move downward rapidly under the rebound action of the extrusion spring 55, and the hair generated when the connecting belt is injected under the knife 53 is removed. The burrs are cut; the sliding block 52 contacts the stopper 62, and the sliding block 52 squeezes the stopper 62 along the inclined surface of the trigger groove 63 so that the two stoppers 62 rotate to the side away from the sliding block 52 and enter the linkage groove 59; then the trigger spring 60 rebounds and resets rapidly upward after losing the squeezing and limiting of the stopper 62, and drives the sliding block 52 and the gate knife 53 to move upward rapidly, and the squeezing spring 55 shrinks adaptively, thereby preventing the gate knife 53 from stagnating at the bottom after cutting the burrs of the connecting belt and blocking the subsequent transmission of the connecting belt.

[0048] When the rotating disk 58 drives the hinge rod 56 to move upward, the cross bar 54 slides upward with the hinge rod 56 under the limiting action of the sliding groove 51, and the cross bar 54 drives the gate knife 53, the sliding block 52 and the stopper 62 to slide upward along the sliding groove 51 through the extrusion spring 55 and the connecting rod 61. When the stopper 62 contacts the inclined surface of the upper end of the linkage groove 59, the stopper 62 gradually closes together along the inclined surface of the linkage groove 59, and then continues to rise along the sliding groove 51; at the same time, when the sliding block 52 hits the protrusion 65 during the rising process, the protrusion 65 shrinks into the accommodating groove 64 under the extrusion of the sliding block 52, and the reset spring 66 shrinks adaptively, and then the sliding block 52 continues to rise and reset, so that the rotating disk 58 will drive the gate knife 53 to automatically cut the connecting belt every time it rotates one circle, and there is no need to manually cut the burrs of the connecting belt after injection molding, which greatly improves production efficiency and saves manpower.

[0049] It should be noted that the elastic force of the trigger spring 60 is greater than the elastic force of the extrusion spring 55, so that after the trigger spring 60 loses the limit of the block 62, the gate 53 and the sliding block 52 rise rapidly under the elastic force of the trigger spring 60, and the extrusion spring 55 contracts under the elastic force of the trigger spring 60. Embodiment 2:

[0050] Reference Fig. 9 As shown, on the basis of embodiment one, in order to better cut the burrs of the connecting belt and grind the cut part of the connecting belt, based on this, in this embodiment, further improvements are made on the basis of the original gate knife 53. The gate knife 53 is rectangular, and the middle part of the gate knife 53 is hollow. The inner wall of the gate knife 53 is installed with a grinding plate 531 for grinding the cut connecting belt, and the upper end of the gate knife 53 is installed with a support rod 532 for facilitating the removal of the connecting belt.

[0051] It should be noted that the gap formed in the middle of the gate knife 53 is the same as the appearance of the connecting belt, so that when the gate knife 53 cuts the connecting belt, all the burrs on its outer wall can be removed. And because the gap in the middle of the gate knife 53 is the same as the appearance of the connecting belt, after the gate knife 53 removes the burrs on the outer wall of the connecting belt, the connecting belt will be stuck inside the gate knife 53 and rise synchronously with it.

[0052] In the specific implementation process, after the gate knife 53 moves downward to cut the burrs on the connecting belt, the connecting belt is inserted into the middle of the gate knife 53 and rises synchronously with it. Then, when the gate knife 53 cuts the next connecting belt again, the next connecting belt is inserted into the middle of the gate knife 53 again and lifts the first connecting belt upward. The first connecting belt rises through the layer, and the grinding plate 531 grinds the cutting part of its connecting belt, so that the gate knife 53 continues to shear the transmission connecting belt so that the connecting belt inside it gradually rises and the connecting belt is cut and continuously polished by the grinding plate 531 until the connecting belt rises to the upper end of the gate knife 53. At this time, the connecting belt is located between multiple support plates, so that the support plates prevent the connecting belt from falling during the up and down movement of the gate knife 53, and when the connecting belt is stored between the support plates, it is convenient to directly take out the connecting belt from the gap between the multiple support plates.

[0053] During operation: the first step is to put plastic particles into the control box 1, and then heat the plastic particles through the heating wire, and then put the connecting belt into the injection molding plate 32, and then put the connecting belt into the injection groove 311, and then put the metal sheet into the injection molding groove 312, and then start the control button 317, and the control button 317 transmits a signal to the controller 11, and the controller 11 controls the drive motor 316 to start, and the drive motor 316 rotates 180 degrees and drives the placement plate 31 to rotate synchronously through the output shaft, and the placement plate 31 drives the injection molding plate 32 to rotate synchronously, so that the injection molding plate 32 rotates to the bottom of the upper sealing plate, and then the controller 11 controls the hydraulic cylinder 313 to start, and the telescopic end of the hydraulic cylinder 313 drives the upper sealing plate to move downward and docks with the positioning rod 314 and the positioning groove 315, so that the upper sealing plate and the injection molding plate 32 rotate to the bottom of the upper sealing plate. The plastic plates 32 are aligned and fit together so that a seal is formed between the upper sealing plate and the injection molding plate 32, and the vacuum pump 310 is started. The vacuum pump 310 evacuates air in the injection molding groove 312 through the vacuum pipe 319, so that a negative pressure state is formed in the injection molding groove 312, and then the molten plastic is quickly injected into the injection molding groove 312 through the connecting pipe 12. Because the injection molding groove 312 is in a negative pressure, bubbles in the plastic after directly injecting the plastic into the injection molding groove 312 are avoided, which affects the product quality; after the injection molding is completed, the controller 11 controls the telescopic end of the hydraulic cylinder 313 to contract and drive the upper sealing plate to move upward, and then drives the motor 316 to rotate 180° again. At this time, the plastic cools and solidifies, and the injection-molded connecting belt is taken out and placed in the shearing mechanism 5, thereby completing the automatic injection molding of the connecting belt, greatly improving the work efficiency.

[0054] Step 2: After the injection molding of the connecting belt is completed, the connecting belt is thrown to the upper end of the conveyor belt 42, and then the servo motor 48 is started. The output shaft of the servo motor 48 drives the transmission shaft 41 to rotate, and the transmission shaft 41 drives the conveyor belt 42 to rotate synchronously. The conveyor belt 42 drives the connecting belt at its upper end to move away from the injection molding box 3. When the connecting belt moves to the side of the limit plate 44, the connecting belt gradually moves along the inclined surface of the limit plate 44 to the side close to the guide plate 43, and through the gap between the limit plate 44 and the guide plate 43, the connecting belt makes the length direction of the connecting belt flush with the conveying direction of the conveyor belt 42 after passing through, and there is no need for manual stacking to affect production efficiency.

[0055] In addition, during the rotation of the transmission shaft 41, the transmission shaft 41 rotates synchronously with the limit wheel 46 driven by the conveyor belt 42, so that when the connecting belt is transmitted to the limit wheel 46, when the side of the limit wheel 46 with the arc groove 47 has not rotated to the bottom, the bottom of the limit wheel 46 is in contact with the upper end of the conveyor belt 42, so that the connecting belt cannot be transmitted forward; when the side of the limit wheel 46 with the arc groove 47 rotates to the bottom, a gap is formed between the limit wheel 46 and the conveyor belt 42, and then the connecting belt continues to move away from the injection molding box 3, and when a connecting belt passes through the arc groove 47, the limit wheel 46 is in contact with the conveyor belt 42 again, and the arc groove 47 rotates to the upper end; thereby, automatic discharge is realized, so that the connecting belt is equidistantly transmitted to the shearing mechanism 5, which is convenient for the subsequent shearing of burrs on the connecting belt, thereby ensuring the quality of subsequent shearing.

[0056] Step 3: During the rotation of the transmission shaft 41, the rotating shaft 57 and the rotating disk 58 are driven to rotate. During the rotation of the rotating disk 58, the hinged rod 56 is driven to rotate circumferentially. When the rotating disk 58 drives the hinged rod 56 to rotate circumferentially, when the hinged rod 56 moves downward, the cross bar 54 slides downward along the hinged rod 56 under the limitation of the sliding groove 51. The cross bar 54 drives the gate knife 53 and the sliding block 52 to slide downward along the sliding groove 51 through the extrusion spring 55; when the sliding block 52 slides to the top of the protrusion 65, the sliding block 52 cannot slide downward due to the obstruction of the protrusion 65, and the cross bar 54 continues to move downward to compress the extrusion spring 55.

[0057] At the same time, during this process, the cross bar 54 drives the block 62 to descend synchronously through the connecting rod 61. When the block 62 contacts the trigger spring 60, the block 62 squeezes the trigger spring 60 to make the trigger spring 60 contract. When the extrusion spring 55 is compressed to the limit, the protrusion 65 contracts into the accommodating groove 64 under the extrusion of the sliding block 52, and the reset spring 66 contracts adaptively. The sliding block 52 and the knife 53 move downward rapidly under the rebound action of the extrusion spring 55, and the hair generated when the connecting belt is injected under the knife 53 is removed. The burrs are cut; the sliding block 52 contacts the stopper 62, and the sliding block 52 squeezes the stopper 62 along the inclined surface of the trigger groove 63 so that the two stoppers 62 rotate to the side away from the sliding block 52 and enter the linkage groove 59; then the trigger spring 60 rebounds and resets rapidly upward after losing the squeezing and limiting of the stopper 62, and drives the sliding block 52 and the gate knife 53 to move upward rapidly, and the squeezing spring 55 shrinks adaptively, thereby preventing the gate knife 53 from stagnating at the bottom after cutting the burrs of the connecting belt and blocking the subsequent transmission of the connecting belt.

[0058] When the rotating disk 58 drives the hinge rod 56 to move upward, the cross bar 54 slides upward with the hinge rod 56 under the limiting action of the sliding groove 51, and the cross bar 54 drives the gate knife 53, the sliding block 52 and the stopper 62 to slide upward along the sliding groove 51 through the extrusion spring 55 and the connecting rod 61. When the stopper 62 contacts the inclined surface of the upper end of the linkage groove 59, the stopper 62 gradually closes together along the inclined surface of the linkage groove 59, and then continues to rise along the sliding groove 51; at the same time, when the sliding block 52 hits the protrusion 65 during the rising process, the protrusion 65 shrinks into the accommodating groove 64 under the extrusion of the sliding block 52, and the reset spring 66 shrinks adaptively, and then the sliding block 52 continues to rise and reset, so that the rotating disk 58 will drive the gate knife 53 to automatically cut the connecting belt every time it rotates one circle, and there is no need to manually cut the burrs of the connecting belt after injection molding, which greatly improves production efficiency and saves manpower.

[0059] Step 4: After the gate knife 53 moves downward to cut the burrs on the connecting belt, the connecting belt is inserted into the middle of the gate knife 53 and rises synchronously with it. Then, when the gate knife 53 cuts the next connecting belt again, the next connecting belt is inserted into the middle of the gate knife 53 again and lifts the first connecting belt upward. The first connecting belt rises through the layer, and the grinding plate 531 grinds the cutting part of its connecting belt, so that the gate knife 53 continues to shear the transmission connecting belt so that the connecting belt inside it gradually rises and the connecting belt is cut and continuously polished by the grinding plate 531 until the connecting belt rises to the upper end of the gate knife 53. At this time, the connecting belt is located between multiple support plates, so that the support plates prevent the connecting belt from falling during the up and down movement of the gate knife 53, and when the connecting belt is stored between the support plates, it is convenient to directly take out the connecting belt from the gap between the multiple support plates.

[0060] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automatic cutting and injection molding device for a car steering wheel connecting belt, comprising a control box (1), two mounting brackets (2) are mounted on the bottom of the control box (1), and the characteristics are: The bottom of the mounting bracket (2) is connected to an injection molding box (3), one side of the injection molding box (3) is provided with two bracket plates (4), and a shearing mechanism (5) is installed between the two bracket plates (4); The control box (1) has a controller (11) mounted on the upper end, a heating wire mounted on the inner wall of the control box (1), a connecting pipe (12) for connecting to the interior of the control box (1) mounted on the bottom of the control box (1), an upper cover (13) connected to the bottom of the connecting pipe (12), a placement plate (31) rotatably mounted in the middle of the injection molding box (3), and an injection molding plate (32) mounted on the upper end of the placement plate (31); A plurality of transmission shafts (41) are rotatably connected between the two support plates (4), a conveyor belt (42) is sleeved on the outer wall of the plurality of transmission shafts (41), a guide plate (43) arranged along the length direction of the conveyor belt (42) is installed on the outer wall of the conveyor belt (42), a limiting plate (44) is installed on the opposite side of any one support plate (4) to the other support plate (4), one end of the limiting plate (44) is gradually inclined toward the side away from the injection molding box (3), and the limiting plate (44) is located at the upper end of the conveyor belt (42); A linkage shaft (45) is rotatably connected between the two support plates (4), the transmission shaft (41) and the linkage shaft (45) are connected via a belt transmission, a limiting wheel (46) is sleeved on the outer wall of the linkage shaft (45), the limiting wheel (46) is located on the side of the limiting plate (44) away from the injection molding box (3), and the limiting wheel (46) is located above the conveyor belt (42), and an arc groove (47) is opened on the outer wall of the limiting wheel (46) for the connection belt to pass through, and a servo motor (48) is installed on the opposite side of any one support plate (4) to the other support plate (4) through a motor seat, and the output shaft of the servo motor (48) is connected to the transmission shaft (41); The shearing mechanism (5) comprises two vertically arranged sliding grooves (51) opened on opposite sides of the two support plates (4), the sliding groove (51) being located on a side of the limiting wheel (46) away from the injection molding box (3), a sliding block (52) being slidably connected in the sliding groove (51), the bottom of the sliding block (52) being semicircular, and gate knives (53) being connected to opposite sides of the two sliding blocks (52); The gate knife (53) is rectangular, and the middle of the gate knife (53) is hollow. The gap formed in the middle of the gate knife (53) has the same shape as the connecting belt. The inner wall of the gate knife (53) is installed with a grinding plate (531) for cutting and grinding the connecting belt. The upper end of the gate knife (53) is installed with a support rod (532) for facilitating the removal of the connecting belt.

2. The automatic cutting and injection molding device for a car steering wheel connecting belt according to claim 1 is characterized in that: The injection molding plate (32) has two injection grooves (311) at the upper end, and injection molding grooves (312) are provided at both ends of the injection grooves (311) along the length direction. A plurality of hydraulic cylinders (313) are installed between the upper end of the upper cover (13) and the control cabinet (1). A plurality of positioning rods (314) are installed at the lower end of the upper cover (13). A positioning groove (315) corresponding to the positioning rod (314) is provided at the upper end of the injection molding plate (32).

3. The automatic cutting and injection molding device for a car steering wheel connecting belt according to claim 1 is characterized in that: A drive motor (316) is installed in the injection molding box (3); the placement plate (31) is sleeved on the outer wall of the output shaft of the drive motor (316); a control button (317) is installed on the side wall of the injection molding box (3); and the control button (317), the drive motor (316) and the hydraulic pump are all electrically connected to the controller (11).

4. The automatic cutting and injection molding device for a car steering wheel connecting belt according to claim 2 is characterized in that: A through groove (318) is provided in the middle of the placement plate (31); a plurality of air extraction pipes (319) in communication with the injection grooves (312) are connected to a side of the injection plate (32) close to the axis of the placement plate (31); an air extraction pump (310) is installed at the bottom of the injection molding box (3); an end of the air extraction pipe (319) away from the injection groove (312) passes through the through groove (318) and is connected to the air extraction pump (310).

5. The automatic cutting and injection molding device for a car steering wheel connecting belt according to claim 1 is characterized in that: The shearing mechanism (5) further comprises a cross bar (54) slidably connected to the two sliding grooves (51), the cross bar (54) being located above the gate knife (53), a compression spring (55) being connected between the cross bar (54) and the gate knife (53), a hinged rod (56) being rotatably connected to the upper end of the cross bar (54), a rotating shaft (57) being rotatably connected to any one of the bracket plates (4), the rotating shaft (57) being connected to a transmission shaft (41) adjacent thereto via a belt transmission, a rotating disk (58) being sleeved on an outer wall of the rotating shaft (57) and being located between the two bracket plates (4), an end of the hinged rod (56) being away from the cross bar (54) being hinged to the rotating disk (58), and a hinged portion between the hinged rod (56) and the rotating disk (58) being located away from the center of the rotating disk (58).

6. The automatic cutting and injection molding device for a car steering wheel connecting belt according to claim 1, characterized in that: A linkage groove (59) is provided at the bottom of the sliding groove (51). The width of the upper end of the linkage groove (59) gradually narrows toward the middle. A trigger spring (60) is installed at the bottom of the linkage groove (59). Connecting rods (61) are installed at both ends of the bottom of the cross bar (54) in the length direction. The bottom of the connecting rod (61) is rotatably connected to two stoppers (62). The opposite sides of the two stoppers (62) are provided with trigger grooves (63) that are gradually inclined from bottom to top toward both sides. The two stoppers (62) are located below the knife gate (53).

7. The automatic cutting and injection molding device for a car steering wheel connecting belt according to claim 1, characterized in that: An accommodating groove (64) is provided on opposite sides of the two sliding grooves (51), a protrusion (65) is slidably connected in the accommodating groove (64), and a return spring (66) is connected between the protrusion (65) and the accommodating groove (64).

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