Multi-hole synchronous material head removing device with independent fine adjustment mechanism

Abstract

The multi-hole synchronous material head removing device with the independent fine adjustment mechanism comprises a shell, a left guide rail and a right guide rail are fixed in the shell, a sliding frame is arranged on each guide rail in a sliding mode, a support is erected above each guide rail, and a lifting plate is arranged below each support in a sliding mode; an upward cutting assembly is fixed to the sliding frame, a downward cutting assembly is fixed to the lower portion of the lifting plate, and a suction cup is arranged above the position between the two guide rails. The cutting assembly comprises a base, two parallel sliding rails are fixed to the base, a plurality of pairs of sliding blocks corresponding to each other are arranged in the two sliding rails in a sliding mode, a first vertical screw and a second vertical screw which are parallel to each other are rotationally arranged between each pair of sliding blocks, and the centers of the first vertical screws and the centers of the second vertical screws are rotationally connected into clamping blocks. A cross groove is formed in the upper surface of the clamping block, and cutters are arranged between the clamping block and the two sliding blocks respectively; the device has the characteristics of synchronous cutting, independent fine adjustment and flexible adaptation.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding processing, and specifically to a multi-cavity synchronous gate-cutting device with an independent fine-tuning mechanism. Background Art

[0002] With the continuous improvement of the requirements for production efficiency in the injection molding industry, multi-cavity molds are widely used because they can form multiple products in one molding. However, after injection molding, a gate will be formed at the connection between the product and the runner, which usually presents a cross-shaped structure. The gate needs to be removed through a post-processing operation to obtain independent finished products. Manual gate-cutting has low efficiency and poor consistency, while an automated synchronous gate-cutting device has become the key equipment for improving the post-processing efficiency.

[0003] Currently, the mainstream synchronous gate-cutting devices mostly adopt an integral cutter group or an anvil structure with fixed cutting positions: the positions of all cutters or anvils are fixed by a rigid frame and cannot be independently adjusted for the cutting position of a single cavity. Synchronous drive mechanism: The cutter is driven to press down integrally through a cylinder, a hydraulic cylinder or a cam mechanism to cut off all gates at one time. However, in actual applications of such devices, due to processing errors of each cavity of the mold, shrinkage differences caused by uneven temperature or pressure distribution during the injection molding process, or inconsistent wear after long-term use of the cutter, the actual positions of the gates of each cavity may deviate from the theoretical design values. The integral cutter group cannot independently compensate for the deviation of individual cavities, resulting in excessive residual height of the gates of some products, such as excessive residual height on one side or incomplete cutting, which affects the assembly or appearance quality of the products. When the cutting of a certain cavity is abnormal, it is necessary to adjust the position of the cutter as a whole or replace the cutter group, which may cause new deviations in other originally qualified cavities, forming a vicious cycle of "adjustment - readjustment". Frequent overall disassembly and calibration significantly increase the downtime and maintenance costs. For injection molded products with inclined or asymmetric surfaces, it is difficult for the cutter with a fixed angle to fit the joint surface of the gate and the product, easily resulting in cutter edge chipping or product scratching. Traditional devices rely on high-precision molds to ensure cutting consistency, which puts harsh requirements on mold processing and maintenance and limits their application in small-batch, multi-variety flexible production.

[0004] Therefore, it is necessary to provide a multi-cavity synchronous gate-cutting device with an independent fine-tuning mechanism to solve the problems raised in the above background art. Summary of the Invention

[0005] To achieve the above object, the present invention provides the following technical solution: A multi-cavity synchronous gate-cutting device with an independent fine-tuning mechanism, including a housing, two sets of left and right guide rails are fixed inside the housing, a carriage is slidably arranged on each set of guide rails, a bracket is erected above each set of guide rails, a lifting plate is slidably arranged below each bracket, a cutting assembly facing upward is fixed on the carriage, a cutting assembly facing downward is fixed below the lifting plate, and a suction cup is arranged above the space between the two sets of guide rails;

[0006] The cutting assembly includes a base, on which two parallel slide rails are fixed. A plurality of pairs of corresponding sliders are slidably arranged in the two slide rails. Between each pair of sliders, two parallel first vertical screws and second vertical screws are rotatably arranged. The centers of the first vertical screw and the second vertical screw are rotatably connected in a clamping block. A cross-shaped groove is formed on the upper surface of the clamping block. A cutting knife is provided between the clamping block and each of the two sliders.

[0007] Further, as a preference, the cross-section of the groove in the clamping block is V-shaped.

[0008] Further, as a preference, two tool holders are connected below each cutting knife. The two tool holders are respectively threadedly connected to the first vertical screw and the second vertical screw, and the thread directions of the two tool holders connected to the same first vertical screw or second vertical screw are opposite.

[0009] Further, as a preference, a universal ball is rotatably connected in each tool holder. The first vertical screw or the second vertical screw is threadedly connected to the universal ball;

[0010] The two tool holders corresponding to the same cutting knife are slidably connected together through a plug rod.

[0011] Further, as a preference, the cutting knife is slidably connected to the tool holder. A cutting knife spring is connected between each tool holder and the corresponding cutting knife.

[0012] Further, as a preference, push bars are distributed on both sides of each clamping block. The two ends of the push bar are slidably connected to the side surfaces of the corresponding sliders. The upper surface of the push bar is in contact with the lower edge of the cutting knife.

[0013] Further, as a preference, two eccentric shafts are rotatably embedded in the base. The eccentric shafts are vertically and crosswise distributed perpendicular to each push bar on the same base. The eccentric shafts are in contact with the lower surfaces of the push bars;

[0014] Both ends of the eccentric shaft are eccentrically connected with connecting rods.

[0015] Further, as a preference, the upper ends of the two connecting rods on the same side of the same base are both slidably connected to a pressing plate. A support spring is arranged between the pressing plate and the base.

[0016] Further, as a preference, two X-shaped scissors connecting rods are hinged above each slider. The scissors connecting rods between adjacent sliders on the same slide rail are hinged together.

[0017] Further, as a preference, a horizontal screw is rotatably arranged above each slide rail. The horizontal screw is threadedly connected to the two sliders on both sides of the corresponding slide rail with opposite thread directions.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] In the present invention, through the linkage design of the upper and lower two groups of cutting components, the upper and lower cutting of multiple material heads can be completed at one time. Compared with the traditional single-point cutting, the efficiency is increased by several times. The suction cup cooperates with the sliding carriage to automatically load and unload materials, and the linkage action of the lifting plate and the cutting components realizes the full-process automation, reducing manual intervention.

[0020] In the present invention, through the independent fine adjustment of the first vertical screw rod and the second vertical screw rod, the position of the cutting tool is accurately controlled to ensure that the cutting edge is aligned with the joint of the material head and the product, avoiding damage to the product. The design of the universal ball and the insertion rod enables the cutting tool to automatically adjust with the inclination angle of the product surface, fitting complex curved surfaces and avoiding cutting misalignment or residue. The scissor link and the cross screw rod cooperate to realize the synchronous adjustment of the slider spacing, adapting to injection-molded products of different sizes without the need to replace the mold.

[0021] In the present invention, when the lifting plate descends, through the cooperation of the pressure plate and the support spring, the eccentric shafts of the upper and lower cutting components synchronously drive the push bars, and the upper and lower cutting tools simultaneously apply cutting forces in opposite directions to the material head, forming a symmetric stress structure, offsetting the risk of material offset or deformation caused by unilateral cutting, avoiding cracks or burrs on the product due to uneven stress, and ensuring that the cutting-in actions of the cutting tools are completely synchronous, eliminating vibrations caused by timing errors; the material head of the injection-molded product is vertically fixed through the V-shaped groove of the clamping block. When the upper and lower cutting tools cut in synchronously, the material head remains stable under the two-way clamping, avoiding shaking or tilting during the cutting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a multi-cavity synchronous material head removing device with an independent fine adjustment mechanism;

[0023] Figure 2 It is a schematic diagram of the structure at one of the brackets;

[0024] Figure 3 It is a schematic diagram of the overall structure of the cutting component;

[0025] Figure 4 It is a schematic diagram of the structure of one pair of sliders;

[0026] Figure 5 It is a schematic cross-sectional structure diagram of the cutting component;

[0027] In the figure: 1. Outer shell; 2. Guide rail; 21. Slide carriage; 3. Bracket; 31. Lifting plate; 4. Suction cup; 5. Cutting assembly; 51. Base; 52. Slide rail; 53. Slide block; 54. First vertical screw rod; 55. Second vertical screw rod; 56. Clamping block; 57. Cutting knife; 571. Tool holder; 572. Universal ball; 573. Insert rod; 574. Cutting knife spring; 58. Scissor link; 59. Cross screw rod; 510. Push bar; 511. Eccentric shaft; 512. Link; 513. Pressing plate; 514. Support spring. Detailed implementation manner

[0028] Please refer to Figures 1 - 5 In the embodiment of the present invention, a multi-cavity synchronous deheading device with an independent fine-tuning mechanism includes an outer shell 1. Inside the outer shell 1, two groups of left and right guide rails 2 are fixed. On each group of guide rails 2, a slide carriage 21 is slidably arranged. Above each group of guide rails 2, a bracket 3 is erected. Below each bracket 3, a lifting plate 31 is slidably arranged. An upward-facing cutting assembly 5 is fixed on the slide carriage 21, and a downward-facing cutting assembly 5 is fixed under the lifting plate 31. Above the space between the two groups of guide rails 2, a suction cup 4 is arranged.

[0029] The cutting assembly 5 includes a base 51. On the base 51, two parallel slide rails 52 are fixed. Multiple pairs of corresponding slide blocks 53 are slidably arranged in the two slide rails 52. Between each pair of slide blocks 53, two parallel first vertical screw rods 54 and second vertical screw rods 55 are rotatably arranged. The centers of the first vertical screw rod 54 and the second vertical screw rod 55 are rotatably connected in a clamping block 56. On the upper surface of the clamping block 56, a cross-shaped groove is opened. Between the clamping block 56 and the two slide blocks 53, a cutting knife 57 is respectively arranged.

[0030] The slide carriage 21 slides left and right on the guide rail 2, and can load and unload materials in the cutting assembly 5 on it through the suction cup 4. And when it slides below the corresponding lifting plate 31, the cutting assembly 5 under the lifting plate 31 descends with the lifting plate 31, and can cut the injection molded product in the cutting assembly 5 on the slide carriage 21 to remove the head.

[0031] In the cutting assembly 5, multiple cross-shaped heads of the injection molded product are respectively stuck in the cross-shaped grooves of each clamping block 56, so as to support and position the injection molded product. By rotating the first vertical screw rod 54 and the second vertical screw rod 55, the position of the cutting knife 57 can be adjusted to make the cutting knife 57 align with the joint of the injection molded product and the head. When the cutting assembly 5 under the lifting plate 31 descends with the lifting plate 31, the cutting knives 57 in the upper and lower cutting assemblies 5 cut the head off from above and below at the same time.

[0032] In this embodiment, the cross-section of the groove in the clamping block 56 is V-shaped to adapt to heads with different diameters.

[0033] In this embodiment, two tool holders 571 are connected below each cutting tool 57. The two tool holders 571 are respectively threadedly connected to the first vertical screw rod 54 and the second vertical screw rod 55, and the thread rotation directions of the two tool holders 571 connected to the same first vertical screw rod 54 or second vertical screw rod 55 are opposite.

[0034] That is to say, by synchronously rotating the first vertical screw rod 54 and the second vertical screw rod 55, the position of the tool holder 571 can be adjusted, so that the cutting tool 57 is aligned with the joint of the injection molded product and the sprue.

[0035] In this embodiment, a universal ball 572 is rotatably connected inside each tool holder 571, and the first vertical screw rod 54 or the second vertical screw rod 55 is threadedly connected to the universal ball 572;

[0036] The two tool holders 571 corresponding to the same cutting tool 57 are slidably connected together through a plug rod 573.

[0037] That is to say, when the first vertical screw rod 54 and the second vertical screw rod 55 rotate out of sync, the two tool holders 571 corresponding to the same cutting tool 57 will be staggered front and back. Under the action of the universal ball 572 and the plug rod 573, the cutting tool 57 will be tilted, so that the cutting tool 57 can be attached to the surface of the inclined injection molded product.

[0038] In this embodiment, the cutting tool 57 is slidably connected to the tool holder 571, and a cutting tool spring 574 is connected between each tool holder 571 and the corresponding cutting tool 57.

[0039] In this embodiment, push bars 510 are distributed on both sides of each block 56. The two ends of the push bar 510 are slidably connected to the side surfaces of the corresponding sliders 53, and the upper surface of the push bar 510 is in contact with the lower edge of the cutting tool 57.

[0040] In this embodiment, two eccentric shafts 511 are rotatably embedded in the base 51. The eccentric shafts 511 are vertically and crosswise distributed with each push bar 510 on the same base 51, and the eccentric shafts 511 are in contact with the lower surface of the push bar 510;

[0041] Both ends of the eccentric shaft 511 are eccentrically connected with a connecting rod 512.

[0042] That is to say, by rotating the connecting rod 512, the eccentric shaft 511 can be eccentrically rotated, thereby pushing each push bar 510 upward, and further enabling the cutting tool 57 to cut the sprue.

[0043] In this embodiment, the upper ends of the two connecting rods 512 on the same side of the same base 51 are both slidably connected to a pressing plate 513, and a supporting spring 514 is arranged between the pressing plate 513 and the base 51.

[0044] Under the action of the support spring 514, the pressure plate 513 is in the highest position, and the connecting rod 512 rotates to the uppermost position. At this time, the rotation angle of the eccentric shaft 511 makes each push bar 510 in the lowermost position; when the lifting plate 31 descends, the pressure plate 513 in the cutting assembly 5 under the lifting plate 31 presses on the pressure plate 513 in the cutting assembly 5 on the carriage 21, causing the support spring 514 to be compressed. At this time, the eccentric shaft 511 rotates to make the push bar 510 push the cutter 57 close to the blank, so that the cutters 57 above and below the blank simultaneously cut towards the blank to cut it evenly.

[0045] In this embodiment, two X-shaped scissor linkages 58 are hinged above each slider 53, and the scissor linkages 58 between adjacent sliders 53 on the same slide rail 52 are hinged together.

[0046] That is to say, under the action of the scissor linkages 58, the distance between the sliders 53 is always the same.

[0047] In this embodiment, a horizontal screw rod 59 is rotatably arranged above each slide rail 52, and the horizontal screw rod 59 is threadedly connected to two sliders 53 on both sides of the corresponding slide rail 52 with opposite thread directions.

[0048] That is to say, by rotating the horizontal screw rod 59, the distance between two sliders 53 on both sides of the slide rail 52 can be adjusted, and under the action of the scissor linkages 58, the other sliders 53 between the two sliders 53 will also change their distances accordingly to adapt to injection molded products of different specifications.

[0049] During specific implementation:

[0050] The carriage 21 slides along the guide rail 2 to below the suction cup 4, and the suction cup 4 adsorbs the injection molded product and places it on the cutting assembly 5 on the carriage 21, and the carriage 21 carries the product and moves to below the lifting plate 31;

[0051] Rotate the horizontal screw rod 59 above the slide rail 52. Since the thread directions on both sides of the horizontal screw rod 59 are opposite, the two sliders 53 on both sides move synchronously in opposite directions, and the scissor linkages 58 drive the adjacent sliders to keep the distance uniform, and adjust the distance between the sliders 53 to be consistent with the distribution of the blanks of the injection molded product;

[0052] Insert the cross-shaped blank of the injection molded product into the V-shaped groove of the clamping block 56;

[0053] Synchronously rotate the first vertical screw rod 54 and the second vertical screw rod 55, and the tool holders 571 before and after the same clamping block 56 approach or move away synchronously, so that the cutter 57 moves horizontally to align with the joint of the blank and the product;

[0054] If the surface of the product is inclined, rotate the first vertical screw rod 54 or the second vertical screw rod 55 alone, and the universal ball 572 allows the two tool holders 571 corresponding to the same cutter 57 to be misaligned front and back, and the cutter 57 tilts with the tool holder to fit the curved surface of the product;

[0055] The lifting plate 31 descends, driving the cutting assembly 5 below the lifting plate 31 to press downwards. The pressing plates 513 of the upper and lower cutting assemblies 5 come into contact, triggering a linkage: the support spring 514 is compressed, the pressing plate 513 moves downwards, the connecting rod 512 drives the eccentric shaft 511 to rotate, pushing the push bar 510 upwards. The push bar 510 jacks up the cutting blade 57, and the upper and lower cutting blades simultaneously cut into the stock head;

[0056] The lifting plate 31 ascends, the support spring 514 rebounds, the push bar 510 resets to the initial position, and the carriage 21 carries the finished product back to the suction cup 4 area to complete the blanking.

[0057] The above-mentioned is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A multi-cavity synchronous gate-cutting device with an independent fine-tuning mechanism, comprising a housing (1), characterized in that, Inside the said housing (1), there are two groups of left and right guide rails (2) fixed. On each group of guide rails (2), there is a carriage (21) slidably arranged. Above each group of guide rails (2), there is a bracket (3) erected. Below each bracket (3), there is a lifting plate (31) slidably arranged. On the carriage (21), there is an upward-facing cutting assembly (5) fixed. Below the lifting plate (31), there is a downward-facing cutting assembly (5) fixed. Above the space between the two groups of guide rails (2), there is a suction cup (4); The said cutting assembly (5) includes a base (51). On the base (51), there are two parallel slide rails (52) fixed. Among the two slide rails (52), there are multiple pairs of corresponding sliders (53) slidably arranged. Between each pair of sliders (53), there are two mutually parallel first vertical screw rods (54) and second vertical screw rods (55) rotatably arranged. The centers of the first vertical screw rod (54) and the second vertical screw rod (55) are rotatably connected in a block (56). On the upper surface of the block (56), there are cross-shaped grooves opened. Between the block (56) and the two sliders (53), there is a cutter (57) respectively.

2. The multi-cavity synchronous gate-cutting device with an independent fine-tuning mechanism according to claim 1, wherein, The cross-section of the groove in the said block (56) is V-shaped.

3. The multi-cavity synchronous gate-cutting device with an independent fine-tuning mechanism according to claim 1, characterized in that, Below each cutter (57), there are two tool holders (571) connected. The two tool holders (571) are respectively threadedly connected to the first vertical screw rod (54) and the second vertical screw rod (55), and the thread rotation directions of the two tool holders (571) connected to the same first vertical screw rod (54) or second vertical screw rod (55) are opposite.

4. The multi-cavity synchronous gate-cutting device with an independent fine-tuning mechanism according to claim 3, wherein Inside each tool holder (571), there is a universal ball (572) rotatably connected. The first vertical screw rod (54) or the second vertical screw rod (55) is threadedly connected to the universal ball (572); Between the two tool holders (571) corresponding to the same cutter (57), they are slidably connected together through a plug rod (573).

5. The multi-cavity synchronous gate-cutting device with an independent fine-tuning mechanism according to claim 4, wherein The cutter (57) is slidably connected to the tool holder (571). Each tool holder (571) is connected to the corresponding cutter (57) through a cutter spring (574).

6. The multi-cavity synchronous gate-cutting device with an independent fine-tuning mechanism according to claim 1, characterized in that, On both sides of each block (56), there are push bars (510) distributed. The two ends of the push bar (510) are slidably connected to the side surfaces of the corresponding sliders (53). The upper surface of the push bar (510) is in contact with the lower edge of the cutter (57).

7. The multi-cavity synchronous sprue cutting device with an independent fine-tuning mechanism according to claim 6, characterized in that, Inside the base (51), there are two eccentric shafts (511) rotatably embedded. The eccentric shafts (511) and each push bar (510) on the same base (51) are vertically and crosswise distributed. The eccentric shafts (511) are in contact with the lower surfaces of the push bars (510); Both ends of the eccentric shaft (511) are eccentrically connected with connecting rods (512).

8. The multi-cavity synchronous gate-cutting device with an independent fine-tuning mechanism according to claim 7, characterized in that, The upper ends of the two connecting rods (512) on the same side of the same base (51) are both slidably connected to a pressing plate (513). Between the pressing plate (513) and the base (51), there is a support spring (514).

9. The multi-cavity synchronous gate-cutting device with an independent fine-tuning mechanism according to claim 1, characterized in that, Above each slider (53), there are two X-shaped scissors connecting rods (58) hinged. The scissors connecting rods (58) between adjacent sliders (53) on the same slide rail (52) are hinged together.

10. The multi-cavity synchronous sprue-cutting device with an independent fine-tuning mechanism according to claim 9, characterized in that, Above each of the slide rails (52), a horizontal screw rod (59) is rotatably arranged, and the horizontal screw rod (59) is connected to two sliders (53) on both sides of the corresponding slide rail (52) through threads with opposite helix directions.

Images