Fully-automated gate-cutting apparatus and process for plastic pieces

Abstract

The present invention relates to the field of gate cutting, and in particular to a fully-automated gate-cutting apparatus and process for plastic pieces. The fully-automated gate-cutting apparatus for plastic pieces comprises a machine case; a base is fixed to the bottom inner wall of the machine case; a rotary workbench is in rotatable embedded connection with the top of the base; lower die components for positioning plastic pieces are fixed at an equal angle on the rotary workbench; and each lower die component comprises a lower die body, the bottom of each lower die body being provided with a clearance notch for clearance for a gate on a plastic piece. The fully-automated gate-cutting apparatus for plastic pieces integrate a plurality of steps, such as plastic piece positioning, clamping, gate cutting and placement, thereby achieving a fully-automated operation process, greatly improving production efficiency, and reducing the complexity and labor intensity of manual operations. Moreover, die closing, gate cutting and the rotation of the rotary workbench can be completed simply by using one secondary retractable rod in combination with the remaining pure mechanical structures, so that the failure rate of electrical devices is greatly reduced and debugging is facilitated.

Description

Full-automatic water gap cutting equipment and process for plastic parts TECHNICAL FIELD

[0001] The present application relates to the field of cutting water gap, in particular to a full-automatic water gap cutting equipment and process for plastic parts. BACKGROUND

[0002] The shell of the intelligent wearable product is usually made of plastic by injection molding, but water gap will be generated during the injection molding process, and the number of water gap may be one or more. At present, the process of cutting these water gaps often needs manual assistance, resulting in low efficiency. In the punching process, steps such as mold closing and punching need multiple electrical components to cooperate with each other, which not only makes the debugging process complex, but also increases the failure rate. Because the water gap is usually arranged on the inside of the shell plastic part, and the edge of the shell protrudes inward, the cutting tool needs to be embedded into the inside of the shell to complete the cutting. In order to achieve this purpose, the existing cutting tool needs to rely on multiple directional driving devices for displacement, which makes the equipment cost relatively high.

[0003] Therefore, it is necessary to provide a full-automatic water gap cutting equipment and process for plastic parts to solve the above technical problems. TECHNICAL PROBLEM

[0004] To solve the above technical problems, the present application provides a full-automatic water gap cutting equipment and process for plastic parts. TECHNICAL SOLUTION

[0005] The full-automatic water gap cutting equipment for plastic parts provided by the present application comprises a machine box, a base is fixed to the bottom inner wall of the machine box, a rotary workbench is connected to the top of the base through rotation embedded, a lower mold assembly for positioning the plastic part is fixed at equal angles on the rotary workbench, the lower mold assembly comprises a lower mold body, an avoidance gap for avoiding the water gap of the plastic part is arranged at the bottom of the lower mold body, a two-stage telescopic rod is installed on the bottom inner wall of the machine box, an upper mold assembly for fixing the plastic part in cooperation with the lower mold assembly is installed on the side wall of the thick piston rod of the two-stage telescopic rod, a U-shaped rod is fixed to the side wall of the thick piston rod of the two-stage telescopic rod, a driving groove matched with the end of the U-shaped rod is arranged on the side wall of the rotary workbench, the rotary workbench rotates intermittently when the U-shaped rod moves up and down reciprocally, a first driving block is fixed to the end of the thin piston rod of the two-stage telescopic rod, a through hole is arranged at the center of the rotary workbench, the top end of the through hole extends to the center of the top of the base, a cutting assembly for cutting the water gap of the plastic part is installed on the center of the top of the base, and the first driving block cooperates with the cutting assembly.

[0006] Preferably, the driving grooves are equiangularly arranged on the upper vertical part of the rotary table side wall, the lower vertical part of the rotary table side wall, and the left and right inclined parts connected between the upper and lower vertical parts, the length of the bottom of the left inclined part is greater than the length of the top, and the length of the top of the right inclined part is greater than the length of the bottom.

[0007] Preferably, the end of the U-shaped rod is cylindrical, the width of the lower vertical part and the upper vertical part is equal, and the diameter of the end of the U-shaped rod is 0.1 mm less than the width of the upper vertical part.

[0008] Preferably, the lower die assembly further comprises support legs fixed to the four corners of the bottom of the lower die body, and the support legs are fixedly connected with the rotary table, and the lower die body and the rotary table are provided with a clearance space, and the upper die assembly comprises an L-shaped rod fixed to the side wall of the coarse piston rod of the secondary telescopic rod and an upper die body fixed to the end of the L-shaped rod of the fixing seat.

[0009] Preferably, the upper die body and the lower die body are both provided with a plastic part profiling groove.

[0010] Preferably, the cutting assembly comprises mounting plates symmetrically fixed to the top of the rotary table, the mounting plates are provided with horizontal sliding grooves, a second driving block is arranged between the two mounting plates, the second driving block and the first driving block are both provided with inclined surfaces matched with each other, the side wall of the second driving block is provided with a square protrusion which is slidingly connected in the horizontal sliding groove, a U-shaped frame is arranged between the two mounting plates, the two side walls of the U-shaped frame are both provided with cylindrical blocks, the side wall of the mounting plate is provided with a guide groove, and the cylindrical blocks are arranged in the guide groove, the second driving block is provided with a vertical guide rail, and the U-shaped frame is slidingly connected on the vertical guide rail, and the U-shaped frame is fixed with a cutting knife for cutting the water gap of the plastic part.

[0011] Preferably, the guide groove comprises a rising groove and a horizontal groove arranged at the top end of the rising groove, and the rising groove is arranged obliquely.

[0012] Preferably, the two sides of the case are both provided with windows for loading and unloading.

[0013] Preferably, the cutting knife is at least one.

[0014] A full-automatic water gap cutting process for plastic parts, comprising the following steps:

[0015] S1: Plastic part feeding: the plastic part to be cut is taken off from the injection molding machine by a first mechanical hand and placed on a conveying belt, and the plastic part on the conveying belt is placed into one of the lower die bodies by a second mechanical hand;

[0016] S2: Mold clamping and fixing the plastic part: the plastic part is fixed by the extrusion cooperation of the lower die body and the upper die body;

[0017] S3: cutting water gap: cutting off the water gap of the plastic part through the cutting assembly;

[0018] S4: placing: the injection molded part after cutting off the water gap is placed into the tray by the third mechanical hand;

[0019] The specific steps of step S3 include: driving the first driving block to extrude the second driving block through the fine piston rod of the secondary telescopic rod, the second driving block slides horizontally along the horizontal sliding groove, the second driving block extrudes the U-shaped frame, the U-shaped frame moves along the guide groove, first inclined upward and then horizontally moves, and then the cutting knife cuts the water gap. Beneficial effects

[0020] Compared with the related art, the present application has the following beneficial effects:

[0021] High efficiency and automation: the device integrates multiple processes such as plastic part positioning, clamping, water gap cutting and placing, realizes fully automated operation process, greatly improves production efficiency, and reduces complexity and labor intensity of manual operation.

[0022] Reduced failure rate: only one secondary telescopic rod combined with the rest of the pure mechanical structure can complete the mold closing, water gap cutting and rotation of the rotary workbench, greatly reducing the failure rate of electrical equipment and facilitating debugging.

[0023] Intermittent rotation design: the ingenious cooperation of the U-shaped rod and the driving groove enables the rotary workbench to realize intermittent rotation, which not only enables different lower mold assemblies to be used in cooperation with the upper mold assembly, but also optimizes the overall layout and motion trajectory of the device, improving space utilization.

[0024] Excellent cutting effect and low cost: the design of the cutting assembly fully considers the motion trajectory of the cutting knife and the characteristics of the plastic part, through the inclined upward and horizontal movement of the U-shaped frame, the cutting knife can accurately cut the water gap, while avoiding damage to other parts of the plastic part, the cutting effect is more outstanding, and the cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 is a schematic diagram of the internal structure of the case of the present application;

[0026] Fig. 2 is a schematic diagram of the relative positions of the secondary telescopic rod and the rotary workbench of the present application;

[0027] Fig. 3 is a schematic diagram of the structure of the rotary workbench of the present application;

[0028] Fig. 4 is a schematic diagram of the structure of the first driving block of the present application;

[0029] Fig. 5 is a schematic diagram of the structure of the lower mold body of the present application;

[0030] Fig. 6 is a schematic diagram of the structure of the cutting assembly of the present application;

[0031] Figure 7 is a schematic diagram of the inner side structure of the mounting plate of the present application;

[0032] Figure 8 is a schematic diagram of the relative position between the second driving block and the U-shaped frame of the present application;

[0033] Figure 9 is a schematic diagram of the overall structure of the present application;

[0034] Figure 10 is a schematic diagram of the structure of the U-shaped frame of the present application.

[0035] Reference numerals in the drawings: 1, case; 2, base; 3, rotating workbench; 4, lower mold body; 5, two-stage telescopic rod; 6, U-shaped rod; 7, first driving block; 8, support leg; 9, L-shaped rod; 10, upper mold body; 11, mounting plate; 12, second driving block; 13, U-shaped frame; 14, cutting knife; 15, lower mold assembly; 16, avoidance notch; 17, upper mold assembly; 18, coarse piston rod; 19, driving groove; 20, fine piston rod; 21, through hole; 22, cutting assembly; 23, upper vertical part; 24, lower vertical part; 25, left inclined part; 26, right inclined part; 27, horizontal sliding groove; 28, inclined surface; 29, square protrusion; 30, cylindrical block; 31, guide groove; 32, vertical guide rail; 33, ascending groove; 34, horizontal groove; 35, window. Embodiment of the present application

[0036] The present application will be further described below in conjunction with the drawings and embodiments.

[0037] Please refer to Figures 1 to 10, a full-automatic water gap cutting device for plastic parts, comprising a case 1, and a base 2 is fixedly and stably installed on the inner wall of the bottom of the case. A rotating workbench 3 is installed on the top of the base 2 through a rotating embedded connection. A series of lower mold assemblies 15 for positioning plastic parts are fixed on the rotating workbench 3 in an equiangular manner. Each lower mold assembly 15 comprises a lower mold body 4, and an avoidance notch 16 is specially designed on the bottom of the lower mold body 4 for avoiding the water gap of the plastic part.

[0038] A two-stage telescopic rod 5 is also installed on the inner wall of the bottom of the case 1, and an upper mold assembly 17 for fixing plastic parts is installed on the side wall of the coarse piston rod 18 of the two-stage telescopic rod 5 in cooperation with the lower mold assembly 15. A U-shaped rod 6 is also fixed on the side wall of the coarse piston rod 18, and a driving groove 19 is provided on the side wall of the rotating workbench 3 in cooperation with the end of the U-shaped rod 6. In this way, when the U-shaped rod 6 moves up and down reciprocally, the rotating workbench 3 will rotate intermittently.

[0039] The end of the thin piston rod 20 of the secondary telescopic rod 5 is fixed with a first driving block 7. A through hole 21 is arranged at the center of the rotary table 3, and the top center of the base 2 extends to the top end of the through hole 21. Here, a cutting assembly 22 for cutting the water port of a plastic part is installed, and the first driving block 7 cooperates with the cutting assembly 22.

[0040] The driving grooves 19 are arranged at equal angles on the upper vertical part 23 of the side wall of the rotary table 3, the lower vertical part 24 of the side wall of the rotary table 3, and the left inclined part 25 and the right inclined part 26 connected between the upper vertical part 23 and the lower vertical part 24, and the lower vertical part 24 and the upper vertical part 23 are arranged at intervals, the length of the bottom of the left inclined part 25 is greater than the length of the top, and the length of the top of the right inclined part 26 is greater than the length of the bottom.

[0041] During the operation of the device, when the thick piston rod 18 of the secondary telescopic rod 5 moves from top to bottom, the end of the U-shaped rod 6 will be located in the upper vertical part 23 and move downward. At this time, the rotary table 3 will not rotate, and the upper mold assembly 17 will move downward. When the end of the U-shaped rod 6 moves to the left inclined part 25, it will contact the bottom of the left inclined part 25, so that the rotary table 3 rotates. Then, when the end of the U-shaped rod 6 moves to the lower vertical part 24, the rotary table 3 will stop rotating again, and the upper mold assembly 17 will continue to move downward. When the end of the U-shaped rod 6 moves to the bottom end of the lower vertical part 24, the upper mold assembly 17 will tightly cooperate with the lower mold assembly 15, so as to clamp the plastic part.

[0042] Conversely, when the thick piston rod 18 of the secondary telescopic rod 5 moves from bottom to top, the end of the U-shaped rod 6 will move upward along the lower vertical part 24, and at this time the rotary table 3 will not rotate. But when the end of the U-shaped rod 6 moves to the right inclined part 26, the rotary table 3 will continue to rotate. When the end of the U-shaped rod 6 moves to the upper vertical part 23, the rotary table 3 will stop rotating again. Through the periodic upward and downward movement of the U-shaped rod 6, the rotary table 3 can realize intermittent rotation, so that different lower mold assemblies 15 can be used in cooperation with the upper mold assembly 17.

[0043] The end of the U-shaped rod 6 is cylindrical, the width of the lower vertical part 24 and the upper vertical part 23 is equal, and the diameter of the end of the U-shaped rod 6 is 0.1mm smaller than the width of the upper vertical part 23. The end of the U-shaped rod 6 can move smoothly in the driving groove 19.

[0044] The lower mold assembly 15 is also very stable in structure, and it also comprises support legs 8 fixed at the bottom of the lower mold body 4, and the support legs 8 are fixedly connected with the rotating table 3. An avoiding space is arranged between the lower mold body 4 and the rotating table 3, which is used for avoiding the cutting assembly 22. The upper mold assembly 17 comprises an L-shaped rod 9 fixed to the side wall of the thick piston rod 18 of the secondary telescopic rod 5, and an upper mold body 10 fixed to the end of the L-shaped rod 9, and the connection mode makes the upper mold assembly 17 very stable.

[0045] The upper mold body 10 and the lower mold body 4 are both provided with plastic part profiling grooves, so that the plastic part can be better clamped. When the water gap is cut, the plastic part can be kept still, so that better cutting effect can be obtained.

[0046] The cutting assembly 22 comprises mounting plates 11 symmetrically fixed at the top of the rotating table 3, the mounting plates 11 are provided with horizontal sliding grooves 27, a second driving block 12 is arranged between the two mounting plates 11, the second driving block 12 and the first driving block 7 are both provided with inclined surfaces 28 matched with each other, the side wall of the second driving block 12 is provided with a square protrusion 29 which is slidingly connected in the horizontal sliding groove 27, a U-shaped frame 13 is arranged between the two mounting plates 11, the two side walls of the U-shaped frame 13 are both provided with cylindrical blocks 30, the side wall of the mounting plate 11 is provided with a guide groove 31, and the cylindrical blocks 30 are arranged in the guide groove 31, the second driving block 12 is provided with a vertical guide rail 32, and the U-shaped frame 13 is slidingly connected on the vertical guide rail 32, and the U-shaped frame 13 is fixed with a cutting knife 14 used for cutting the water gap of the plastic part.

[0047] The guide groove 31 is also very ingenious in design, and it comprises a rising groove 33 and a horizontal groove 34 arranged at the top end of the rising groove 33. The rising groove 33 is arranged in an inclined manner, so that the U-shaped frame 13 can first be inclined to rise and then move horizontally when moving, so that the cutting knife 14 can accurately cut the water gap. The design of the inclined rising of the U-shaped frame 13 is not only used for avoiding the lower mold body 4, but also for avoiding the edge protruding part of the plastic part.

[0048] When the thin piston rod 20 of the secondary telescopic rod 5 is elongated, the thin piston rod 20 drives the first driving block 7 to press the second driving block 12, the second driving block 12 slides horizontally along the horizontal sliding groove 27, the second driving block 12 presses the U-shaped frame 13, so that the U-shaped frame 13 moves along the guide groove 31. Due to the arrangement of the horizontal groove 34 and the rising groove 33, the U-shaped frame 13 first rises obliquely and then moves horizontally, so that the cutting knife 14 cuts the water gap. The purpose of the inclined rising of the U-shaped frame 13 is not only used for avoiding the lower mold body 4, but also for avoiding the edge protruding part of the plastic part.

[0049] The two sides of the case 1 are both provided with windows 35 used for loading and unloading, which is convenient for the robot to load and unload.

[0050] The cutting knife 14 is provided at least one, according to the actual number of water gap, the height of cutting knife 14, according to the actual situation is set.

[0051] A full-automatic cutting water gap process of plastic parts, comprising the following steps:

[0052] S1: plastic parts feeding: the plastic parts to be cut off water gap are taken off from the injection molding machine by the first mechanical hand and placed on the conveying belt, and the plastic parts on the conveying belt are placed into one of the lower mold bodies 4 by the second mechanical hand;

[0053] S2: mold fixing plastic parts: the plastic parts are fixed by the extrusion cooperation of the lower mold body 4 and the upper mold body 10;

[0054] S3: cutting water gap: the water gap of the plastic parts is cut off by the cutting assembly 22;

[0055] S4: placing: the injection molded parts after cutting off the water gap are placed into the tray by the third mechanical hand;

[0056] The specific steps of S3 step include: the first driving block 7 is driven by the fine piston rod 20 of the secondary telescopic rod 5 to extrude the second driving block 12, the second driving block 12 slides horizontally along the horizontal sliding groove 27, the second driving block 12 extrudes the U-shaped frame 13, the U-shaped frame 13 moves along the guide groove 31, first rises obliquely and then moves horizontally, and then the cutting knife 14 cuts off the water gap.

[0057] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent flow transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A full-automatic water gap cutting device for plastic parts, characterized in that, The utility model relates to a plastic part positioning and cutting device, including the chassis, the bottom inner wall of chassis (1) is fixed with the base (2), the top of base (2) is connected with the rotary workbench (3) through rotating embedding, the rotary workbench (3) is fixed with the lower mould assembly (15) for locating plastic part equal angle, the lower mould assembly (15) includes lower mould body (4), the bottom of lower mould body (4) is equipped with the avoidance gap (16) for avoiding plastic part sprue, the bottom inner wall of chassis (1) is installed with two-stage telescopic link (5), the thick piston rod (18) side wall of two-stage telescopic link (5) is installed with the upper mould assembly (17) with lower mould assembly (15) cooperation fixed plastic part, the thick piston rod (18) side wall of two-stage telescopic link (5) is fixed with U type rod (6), the side wall of rotary workbench (3) is equipped with the drive slot (19) with U type rod (6) end cooperation, when U type rod (6) reciprocatingly moves up and down, the rotary workbench (3) intermittent rotation, the thin piston rod (20) end of two-stage telescopic link (5) is fixed with first drive block (7), the center of rotary workbench (3) is equipped with through -hole (21), the top center of base (2) extends to the top of through -hole (21), the top center of base (2) is installed with cutting assembly (22) for cutting plastic part sprue, and first drive block (7) is cooperated with cutting assembly (22).

2. The full-automatic water gap cutting device for plastic parts according to claim 1, characterized in that, The drive slot (19) is arranged at the upper vertical part (23) and the lower vertical part (24) of the side wall of the rotary workbench (3) at equal angles, and the left inclined part (25) and the right inclined part (26) are connected between the upper vertical part (23) and the lower vertical part (24), the length of the bottom of the left inclined part (25) is greater than the length of the top, and the length of the top of the right inclined part (26) is greater than the length of the bottom.

3. The full-automatic water gap cutting device for plastic parts according to claim 2, characterized in that, The end of the U-shaped rod (6) is cylindrical, the width of the lower vertical part (24) and the upper vertical part (23) is equal, and the diameter of the end of the U-shaped rod (6) is 0.1mm less than the width of the upper vertical part (23).

4. The full-automatic water gap cutting device for plastic parts according to claim 1, characterized in that, The lower mould assembly (15) further includes support legs (8) fixed to the bottom of the lower mould body (4), and the support legs (8) are fixedly connected with the rotary workbench (3), an avoidance space is arranged between the lower mould body (4) and the rotary workbench (3), the upper mould assembly (17) includes an L-shaped rod (9) fixed to the side wall of the thick piston rod (18) of the two-stage telescopic link (5) and an upper mould body (10) fixed to the end of the L-shaped rod (9).

5. The full-automatic water gap cutting device for plastic parts according to claim 4, characterized in that, The upper mould body (10) and the lower mould body (4) are both provided with plastic part profiling grooves.

6. The full-automatic water gap cutting device for plastic parts according to claim 1, characterized in that, The cutting assembly (22) comprises mounting plates (11) symmetrically fixed on the top of the rotary workbench (3), the mounting plates (11) are provided with horizontal sliding grooves (27), a second driving block (12) is arranged between the two mounting plates (11), the second driving block (12) and the first driving block (7) are both provided with matching inclined surfaces (28), the side wall of the second driving block (12) is provided with a square protrusion (29) which is slidingly connected in the horizontal sliding groove (27), a U-shaped frame (13) is arranged between the two mounting plates (11), the two side walls of the U-shaped frame (13) are both provided with cylindrical blocks (30), the side wall of the mounting plate (11) is provided with a guide groove (31), and the cylindrical blocks (30) are arranged in the guide groove (31), the second driving block (12) is provided with a vertical guide rail (32), and the U-shaped frame (13) is slidingly connected on the vertical guide rail (32), and the U-shaped frame (13) is fixed with a cutting knife (14) for cutting the water gap of the plastic part.

7. The full-automatic water gap cutting device for plastic parts according to claim 6, characterized in that, The guide groove (31) comprises a rising groove (33) and a horizontal groove (34) arranged at the top end of the rising groove (33), and the rising groove (33) is arranged obliquely.

8. The full-automatic water gap cutting device for plastic parts according to claim 1, characterized in that, The cabinet (1) is provided with windows (35) on both sides for loading and unloading.

9. The full-automatic water gap cutting device for plastic parts according to claim 4, characterized in that, The cutting knife (14) is provided with at least one.

10. A process for cutting a water gap using the full-automatic water gap cutting equipment according to any one of claims 1-9, characterized in that, The method comprises the following steps: S1: plastic part feeding: the plastic part to be cut is taken off from the injection molding machine by the first mechanical arm and placed on the conveying belt, and the plastic part on the conveying belt is placed into one of the lower mold bodies (4) by the second mechanical arm; S2: mold closing and plastic part fixing: the plastic part is fixed by the extrusion cooperation of the lower mold body (4) and the upper mold body (10); S3: cutting water gap: the water gap of the plastic part is cut off by the cutting assembly (22); S4: placing: the injection molded part after cutting off the water gap is placed into the tray by the third mechanical arm; The specific steps of the S3 step comprise: the first driving block (7) is driven by the thin piston rod (20) of the secondary telescopic rod (5) to extrude the second driving block (12), the second driving block (12) slides horizontally along the horizontal sliding groove (27), the second driving block (12) extrudes the U-shaped frame (13), the U-shaped frame (13) moves along the guide groove (31) first obliquely upward and then horizontally, and then the cutting knife (14) cuts the water gap.

Images