Automatic sprue cutting structure

Abstract

The invention discloses an automatic sprue cutting structure which comprises a bottom plate, square iron, an ejector base plate, an ejector retainer plate, a base plate, a plate B, a plate A and a panel and further comprises a sprue piece. The bottom of the plate A is provided with a front mold core, and the top of the plate B is provided with a rear mold core corresponding to the front mold core; a first notch is formed in one side of the front mold core, and a front insert is movably arranged in the first notch; a second notch is formed in the position, corresponding to the first notch, of one side of the rear mold core, and a rear insert is movably arranged in the second notch. The sprue piece comprises a sprue thin plate, and the top of the sprue thin plate is further integrally connected with a sprue column. According to the pouring gate cutting device, automatic cutting of the pouring gate is achieved, manual post-processing is not needed, the production efficiency is greatly improved, meanwhile, the situation that when the pouring gate is cut manually, a product is contaminated or damaged by cutting is avoided, and the quality and integrity of the product are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic molds, in particular to an automatic cutting gate structure. Background Art

[0002] In plastic molds, products are typically cast using side gates. In existing technologies, side gates are often removed manually after injection molding. However, when the product is a cosmetic or transparent part, manual gate removal presents numerous challenges. Firstly, manual operation can easily stain or damage the product, impacting quality. Secondly, manual removal is inefficient, labor-intensive, and increases production costs. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic gate cutting structure, which realizes the automatic cutting of the gate without manual post-processing, greatly improving production efficiency. At the same time, it avoids the situation that may cause dirt or damage to the product when manually cutting the gate, thereby ensuring the quality and integrity of the product.

[0004] In order to achieve the above objectives, the following technical solutions are adopted: An automatic cut-off gate structure comprises a bottom plate, a square iron, a bottom needle plate, a surface needle plate, a pad, a B plate, an A plate and a face plate, and also comprises a gate piece; a front mold core is installed at the bottom of the A plate, and a rear mold core is installed at the top of the B plate corresponding to the front mold core; a first notch is opened on one side of the front mold core, and a front insert is movably arranged in the first notch; a second notch is opened on one side of the rear mold core corresponding to the first notch, and a rear insert is movably arranged in the second notch; the gate piece comprises a gate thin plate, and a gate column is also integrally connected to the top of the gate thin plate; the rear insert A first slot is provided at one end of the top and extends through to its end portion, and the gate plate is embedded in the first slot, and the gate column passes through the front insert and is arranged from the top of the panel; a front oil cylinder is installed on one side of the B plate, and the output shaft of the front oil cylinder is also driven and connected to a locking column; a first socket is provided at the end of the rear insert away from the first slot, and one end of the locking column is inserted into the first socket; a first ejector pin is also installed on the surface needle plate, and a second socket is provided in the first slot and extends through to the bottom of the rear insert, and the upper part of the first ejector pin is movable through the pad and inserted into the second socket.

[0005] Furthermore, a pull rod is arranged on the top of the pad in the vertical direction, and the upper part of the pull rod is connected to the A plate after passing through the B plate; a limiting component is also arranged on the pad to prevent the pull rod from detaching from the pad.

[0006] Furthermore, a first slide groove is provided at the top of the pad along its length direction, and a first mounting hole is also provided in the first slide groove; a limiting boss is also provided at the bottom of the pull rod, and the diameter of the limiting boss is larger than the diameter of the pull rod; the limiting boss is arranged in the first mounting hole; the limiting assembly includes a movable plate arranged in the first slide groove, and a rear oil cylinder installed at one end of the pad and connected to one end of the movable plate; a first bayonet is provided on the movable plate corresponding to the first mounting hole, and the inner wall portion of the first bayonet extends to the top of the first mounting hole; the lower part of the pull rod is movable through the first bayonet.

[0007] Furthermore, the first slide groove includes a first slot hole opened at one end of the top of the pad along the width direction of the pad, and a second slot hole opened at the top of the pad along the length direction of the pad and connected to the first slot hole; the number of the pull rods is three, a pull rod is provided at each end of the first slot hole, and a pull rod is provided at the end of the second slot hole away from the first slot hole; the movable plate has a T-shaped structure, and the T-shaped horizontal end of the movable plate is arranged in the first slot hole, and the T-shaped vertical end of the movable plate is arranged in the second slot hole; limiting slot holes are provided on one side of the T-shaped horizontal end of the movable plate corresponding to the two pull rods and at the end of the T-shaped vertical end of the movable plate corresponding to the pull rod; the first bayonet is provided on the inner wall of the limiting slot hole.

[0008] Furthermore, one end of the pad is connected to a first fixed block, and the rear oil cylinder is installed on the first fixed block; one end of the movable plate is also connected to a rear mold pad, and the output shaft of the rear oil cylinder is connected to the rear mold pad.

[0009] Furthermore, a support column extends downward from the bottom of the gate thin plate, and the support column is inserted into the second insertion hole.

[0010] Furthermore, a first yellow spring is connected between the panel and the A plate.

[0011] Furthermore, a second yellow spring is installed on the top of the pad, and one end of the second yellow spring is against the bottom of the rear insert; the first ejector pin is arranged through the second yellow spring.

[0012] Furthermore, a first oil nozzle and a second oil nozzle are arranged at the other end of the pad; the first oil nozzle is also connected to two first oil pipes, which are respectively connected to one of the oil inlets of the front cylinder and the rear cylinder; the second oil nozzle is also connected to two second oil pipes, which are respectively connected to the other oil inlet of the front cylinder and the rear cylinder; the first oil nozzle is used to inject oil into the front cylinder and the rear cylinder to drive the front cylinder and the rear cylinder to retract the output shaft; the second oil nozzle is used to inject oil into the front cylinder and the rear cylinder to drive the front cylinder and the rear cylinder to extend the output shaft.

[0013] By adopting the above scheme, the beneficial effects of the present invention are: The present invention realizes automatic gate removal without manual post-processing, greatly improving production efficiency. At the same time, it avoids the situation that the product may be soiled or cut when the gate is manually removed, thereby ensuring the quality and integrity of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention omitting the B plate, A plate and panel; Figure 3 for Figure 2 Exploded diagram; Figure 4 A cross-sectional view of the present invention from a first viewing angle; Figure 5 is a cross-sectional view from a second viewing angle of the present invention; Figure 6 is a cross-sectional view of a gate member of the present invention; Figure 7 It is a structural diagram of the product and gate parts; The accompanying drawings illustrate: 1. Bottom plate; 2. Square iron; 3. Bottom needle plate; 4. Surface needle plate; 5. Backing plate; 6. Plate B; 7. Plate A; 8. Panel; 9. Gate piece; 41. First ejector pin; 101. Screws on the front pin; 102. Screws on the rear pin; 51. Pull rod; 52. Limiting boss; 53. Movable plate; 54. Rear oil cylinder; 55. First bayonet; 56. First slot; 57. Second slot; 58. Limiting slot; 59. First fixing block ;50, rear mold pad;61, rear mold core;62, rear insert;63, front oil cylinder;64, locking column;71, front mold core;72, front insert;81, first yellow spring;82, second yellow spring;91, gate sheet;92, gate column;93, support column;101, first oil nozzle;102, second oil nozzle;103, first oil pipe;104, second oil pipe;621, first slot;622, second jack. DETAILED DESCRIPTION

[0015] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] Reference Figure 7As shown, the product targeted by the present invention is a transparent cover, PMMA rubber, which is poured using a large water gate to thin-sheet side gate. Since the product is a transparent part, it is easy to stain or cut the product when cutting the gate. At the same time, manual cutting is inefficient and labor-intensive. In order to solve this problem, the present invention provides an automatic gate cutting structure, including a bottom plate 1, a square iron 2, a bottom needle plate 3, a surface needle plate 4, a pad 5, a B plate 6, an A plate 7 and a panel 8. In one embodiment, it also includes a gate part 9; a front mold core 71 is installed at the bottom of the A plate 7, and a rear mold core 61 is installed at the top of the B plate 6 corresponding to the front mold core 71; a first notch is provided on one side of the front mold core 71, and a front insert 72 is movably arranged in the first notch; a second notch is provided on one side of the rear mold core 61 corresponding to the first notch, and a rear insert 62 is movably arranged in the second notch; The gate part 9 includes a gate thin plate 91, and the top of the gate thin plate 91 is also integrally connected to a gate column 92; a first slot 621 is opened at one end of the top of the rear insert 62, which passes through its end, and the gate thin plate 91 is embedded in the first slot 621. The gate column 92 passes through the front insert 72 and is arranged from the top of the panel 8; a front oil cylinder 63 is installed on one side of the B plate 6, and the output shaft of the front oil cylinder 63 is also driven and connected to the locking column 64; a first plug hole is opened at the end of the rear insert 62 away from the first slot 621, and one end of the locking column 64 is inserted into the first plug hole; a first ejector pin 41 is also installed on the face needle plate 4, and a second plug hole 622 is also opened in the first slot 621, which passes through the bottom of the rear insert 62. The upper part of the first ejector pin 41 can move through the pad 5 and then be inserted into the second plug hole 622.

[0017] Continue to refer to Figures 1 to 7 As shown, in this embodiment, the gate part 9 includes a gate thin plate 91, and the top of the gate thin plate 91 is also integrally connected to a gate column 92. The thickness of the gate thin plate 91 is 0.40 mm. A 45° cut is designed at one end of the top of the gate thin plate 91, and a 60° cut is designed at one end of the bottom. At the same time, a front insert 72 and a rear insert 62 are provided at the corresponding positions of the gate.

[0018] Furthermore, a pull rod 51 is arranged on the top of the pad 5 in the vertical direction, and the upper part of the pull rod 51 moves through the B plate 6 and is connected to the A plate 7; a limiting component is also arranged on the pad 5 for preventing the pull rod 51 from detaching from the pad 5. When the mold is opened, the pull rod 51 is locked by the limit assembly, so that the A / B plate 6 cannot be opened. In a preferred embodiment, the top of the pad 5 is provided with a first slide groove along its length direction, and a first mounting hole is also provided in the first slide groove; the bottom of the pull rod 51 is also provided with a limit boss 52, and the diameter of the limit boss 52 is larger than the diameter of the pull rod 51; the limit boss 52 is arranged in the first mounting hole; the limit assembly includes a movable plate 53 arranged in the first slide groove, and a rear oil cylinder 54 installed at one end of the pad 5 and connected to one end of the movable plate 53; a first bayonet 55 is provided on the movable plate 53 corresponding to the first mounting hole, and the inner wall portion of the first bayonet 55 extends to the top of the first mounting hole; the lower part of the pull rod 51 moves through the first bayonet 5 5 arrangement; the first slide groove includes a first slotted hole 56 opened at one end of the top of the pad 5 along the width direction, and a second slotted hole 57 opened at the top of the pad 5 along the length direction and connected to the first slotted hole 56; the number of the pull rods 51 is provided with three, a pull rod 51 is provided at each end of the first slotted hole 56, and a pull rod 51 is provided at one end of the second slotted hole 57 away from the first slotted hole 56; the movable plate 53 is T-shaped, and the T-shaped horizontal end of the movable plate 53 is arranged in the first slotted hole 56, and the T-shaped vertical end of the movable plate 53 is arranged in the second slotted hole 57; a limiting slot 58 is provided at one side of the T-shaped horizontal end of the movable plate 53 corresponding to the two pull rods 51 and at the end of the T-shaped vertical end of the movable plate 53 corresponding to the pull rod 51; the first bayonet 55 is provided on the inner wall of the limiting slot 58.

[0019] The rear oil cylinder 54 can drive the movable plate 53 to move along the first sliding groove, thereby making the first bayonet 55 approach or move away from the top of the first mounting hole. When the first bayonet 55 is located above the first mounting hole, it is blocked by the first bayonet 55 and the limiting boss 52 can be blocked and limited in the first mounting hole. That is, at this time the pull rod 51 is locked and the A / B plate 6 cannot be opened. When the first bayonet 55 is away from the top of the first mounting hole, the limiting boss 52 is not blocked by the first bayonet 55. At this time, the A / B plate 6 can be opened smoothly.

[0020] Furthermore, in this embodiment, one end of the pad 5 is also connected to a first fixed block 59, and the rear cylinder 54 is installed on the first fixed block 59; one end of the movable plate 53 is also connected to the rear mold pad 50, and the output shaft of the rear cylinder 54 is connected to the rear mold pad 50; the bottom of the gate thin plate 91 is also provided with a support column 93 extending downward, and the support column 93 is inserted into the second socket 622; a first yellow spring 81 is also connected between the panel 8 and the A plate 7; a second yellow spring 82 is also installed on the top of the pad 5, and one end of the second yellow spring 82 is against the bottom of the rear insert 62; the first ejector pin 41 is arranged through the second yellow spring 82.

[0021] At the same time, a first oil nozzle 101 and a second oil nozzle 102 are also arranged at the other end of the pad 5; the first oil nozzle 101 is also connected to two first oil pipes 103, and the two first oil pipes 103 are respectively connected to one of the oil inlets of the front cylinder 63 and the rear cylinder 54; the second oil nozzle 102 is also connected to two second oil pipes 104, and the two second oil pipes 104 are respectively connected to the other oil inlet of the front cylinder 63 and the rear cylinder 54; the first oil nozzle 101 is used to inject oil into the front cylinder 63 and the rear cylinder 54 to drive the front cylinder 63 and the rear cylinder 54 to retract the output shaft; the second oil nozzle 102 is used to inject oil into the front cylinder 63 and the rear cylinder 54 to drive the front cylinder 63 and the rear cylinder 54 to extend the output shaft.

[0022] When the mold is opened, first, the three pull rods 51 are locked by the first latch 55 on the movable plate 53, so that the A / B plate 6 cannot be opened. Under the action of the first yellow spring 81 between the panel 8 and the A plate 7, the panel 8 and the A plate 7 open the mold for the first time. Under the control of the front oil cylinder 63 and the locking column 64, the front insert 72 and the rear insert 62 and the middle gate part 9 are driven to move at the same time, thereby cutting off the side gate of the product; preferably, a front mountain screw 101 is installed on the panel 8 to control The opening distance between the panel 8 and the A plate 7 is 15mm. A rear screw 102 is installed on the pad 5, which can simultaneously limit the rear insert 62 by 15mm and prevent it from falling (the second yellow spring 82 under the rear insert 62 plays an auxiliary role); before the panel 8 and the A plate 7 are opened, the injection molding machine neutron feeds oil to the first oil nozzle 101 to realize the synchronous core pulling of the front and rear cylinders 54. The core pulling distance is 20mm, which is controlled by the stroke of the cylinder. At this time, the locking column 64 is separated from the rear insert 62 and the movable plate 53 releases the pull rod 51, and then the A / B plate 6 opens to realize the second mold opening. At this time, the side gate and the injection runner remain on the rear insert 62 under the action of the tapered cold well, and the product remains on the rear mold; then the bottom needle plate 3 and the surface needle plate 4 move to eject the product (the surface needle plate 4 is equipped with a product ejector pin, and a sliding hole is opened on the movable plate 53 at the position corresponding to the product ejector pin. The upper part of the product ejector pin passes through the sliding hole and is inserted into the rear mold core 61). When the bottom needle plate 3 is ejected 15mm, the first The ejector pin 41 starts to eject the gate until the ejection action is completed; then the mold is closed, the bottom needle plate 3 and the surface needle plate 4 are reset, the A / B plate 6 is closed, the face plate 8 and the A plate 7 are closed, and the front and rear inserts 62 are also closed. Then the injection molding machine neutron supplies oil to the second oil nozzle 102, the front oil cylinder 63 drives the locking column 64 to lock into the rear insert 62, and the rear oil cylinder 54 drives the movable block to reset and lock the pull rod 51; then the glue is injected and the next working cycle is entered in sequence, thereby meeting the normal production of such products.

[0023] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic cut-off gate structure, comprising a bottom plate, a square iron, a bottom needle plate, a surface needle plate, a pad, a B plate, an A plate and a face plate, characterized in that: It also includes a gate piece; a front mold core is installed at the bottom of the A plate, and a rear mold core is installed at the top of the B plate corresponding to the front mold core; a first notch is opened on one side of the front mold core, and a front insert is movably arranged in the first notch; a second notch is opened on one side of the rear mold core corresponding to the first notch, and a rear insert is movably arranged in the second notch; the gate piece includes a gate thin plate, and the top of the gate thin plate is also integrally connected to a gate column; a first slot is opened at one end of the top of the rear insert, The gate plate is embedded in the first slot, and the gate column passes through the front insert and then is arranged from the top of the panel; a front oil cylinder is installed on one side of the B plate, and the output shaft of the front oil cylinder is also driven and connected to the locking column; a first socket is provided on the end of the rear insert away from the first slot, and one end of the locking column is inserted into the first socket; a first ejector pin is also installed on the surface needle plate, and a second socket is provided in the first slot that passes through the bottom of the rear insert, and the upper part of the first ejector pin is movable through the pad and then inserted into the second socket.

2. The automatic cut-off gate structure according to claim 1, characterized in that: A pull rod is arranged on the top of the pad in the vertical direction, and the upper part of the pull rod is connected to the A plate after passing through the B plate; a limiting component is also arranged on the pad for preventing the pull rod from detaching from the pad.

3. The automatic cut-off gate structure according to claim 2, characterized in that: The top of the pad is provided with a first slide groove along its length direction, and a first mounting hole is also provided in the first slide groove; the bottom of the pull rod is also provided with a limiting boss, and the diameter of the limiting boss is larger than the diameter of the pull rod; the limiting boss is arranged in the first mounting hole; the limiting assembly includes a movable plate arranged in the first slide groove, and a rear oil cylinder installed at one end of the pad and connected to one end of the movable plate; a first bayonet is provided on the movable plate corresponding to the first mounting hole, and the inner wall portion of the first bayonet extends to the top of the first mounting hole; the lower part of the pull rod is movable through the first bayonet.

4. The automatic cut-off gate structure according to claim 3, characterized in that: The first slide groove includes a first slot hole opened at one end of the top of the pad along the width direction of the pad, and a second slot hole opened at the top of the pad along the length direction of the pad and connected to the first slot hole; the number of the pull rods is three, a pull rod is set at each end of the first slot hole, and a pull rod is set at the end of the second slot hole away from the first slot hole; the movable plate is T-shaped, and the T-shaped horizontal end of the movable plate is arranged in the first slot hole, and the T-shaped vertical end of the movable plate is arranged in the second slot hole; limiting slot holes are provided on one side of the T-shaped horizontal end of the movable plate corresponding to the two pull rods and at the end of the T-shaped vertical end of the movable plate corresponding to the pull rod; the first bayonet is provided on the inner wall of the limiting slot hole.

5. The automatic cut-off gate structure according to claim 3, characterized in that: One end of the pad is also connected to a first fixed block, and the rear oil cylinder is installed on the first fixed block; one end of the movable plate is also connected to a rear mold pad, and the output shaft of the rear oil cylinder is connected to the rear mold pad.

6. The automatic cut-off gate structure according to claim 1, characterized in that: A support column is further extended downward from the bottom of the gate thin plate, and the support column is inserted into the second insertion hole.

7. The automatic cut-off gate structure according to claim 1, characterized in that: A first yellow spring is also connected between the panel and the A plate.

8. The automatic cut-off gate structure according to claim 1, characterized in that: A second yellow spring is also installed on the top of the pad, and one end of the second yellow spring contacts the bottom of the rear insert; the first ejector pin is arranged through the second yellow spring.

9. The automatic cut-off gate structure according to claim 3, characterized in that: The other end of the pad is also provided with a first oil nozzle and a second oil nozzle; the first oil nozzle is also connected to two first oil pipes, which are respectively connected to one of the oil inlets of the front cylinder and the rear cylinder; the second oil nozzle is also connected to two second oil pipes, which are respectively connected to the other oil inlet of the front cylinder and the rear cylinder; the first oil nozzle is used to inject oil into the front cylinder and the rear cylinder to drive the front cylinder and the rear cylinder to retract the output shaft; the second oil nozzle is used to inject oil into the front cylinder and the rear cylinder to drive the front cylinder and the rear cylinder to extend the output shaft.

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