Small-spacing multi-point glue feeding push plate needle valve structure

Abstract

The utility model relates to the field of hot runner forming molds, and discloses a small-spacing multi-point glue feeding push plate needle valve structure which comprises a plate A, a supporting plate is arranged at the top of the plate A, a panel is arranged at the top of the supporting plate, a main injection nozzle is arranged on the surface of the panel, and a second injection nozzle is arranged on the surface of the main injection nozzle. A splitter plate is fixedly connected into the panel, an air cylinder is fixedly connected to the inner wall of the supporting plate, a push plate is fixedly connected to the output end of the air cylinder, a valve needle is arranged in the push plate, a guide column is fixedly connected to the bottom of the panel, a guide sleeve is fixedly connected to the inner wall of the splitter plate, and an inserting groove is formed in the surface of the push plate. And a connecting plate is arranged on the inner wall of the slot. According to the utility model, by arranging the structures such as the mounting seat, the screw hole and the stud, a single fault module can be quickly detached and replaced for a plurality of groups of valve needles, and meanwhile, the batch valve needles can be quickly detached and replaced, so that the subsequent injection molding efficiency is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to hot runner molding die field especially relates to a small interval multi -point glue push -on plate needle valve structure. BACKGROUND

[0002] Hot runner injection molding is an advanced injection molding technology, it sets up heating channel in injection mold, makes plastic melt state in injection molding process, realizes high -efficient, high -quality injection molding, small interval multi -point glue push -on plate needle valve is a kind of high -precision glue control device in hot runner injection molding system, it is designed specially for complex thin -walled parts, multi -cavity mold or precision micro -product, its core function is through the mechanical linkage push -on plate drive multiple closely arranged needle valve, realizes the precise injection of molten plastic from multiple glue points according to demand in cavity.

[0003] Through the retrieval, China patent publication No. CN211709932U discloses a valve needle structure of hot runner injection mold, provides axial position adjustment and axial buffer force for valve needle when closing glue injection hole through axial buffer mechanism, can greatly reduce the manufacturing and assembly precision requirement of the moving structure for driving valve needle and the precision requirement of movement, improves durability, reliability, can realize longer life.

[0004] In the above technical scheme, axial buffer mechanism and valve needle provide axial position adjustment and buffer, ensure that valve needle has longer service life, but valve needle is used for a long time, and the valve needle surface may appear fuzz or corrosion due to the hot runner system in high temperature environment for a long time, affect its smoothness, or due to thermal expansion and cold shrinkage, valve needle deformation, valve needle sets multiple and cannot provide single module and batch overall quick replacement, which reduces injection efficiency, therefore, a small interval multi -point glue push -on plate needle valve structure is provided to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a kind of small interval multi -point glue push -on plate needle valve structure, to improve the problem that small interval multi -point glue push -on plate needle valve structure in prior art cannot provide single module or batch overall quick replacement for valve needle, which reduces injection efficiency.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a small interval multi-point glue pushing plate needle valve structure, including A board, the top of A board is provided with the support plate, the top of support plate is provided with the support plate, the top of support plate is provided with the panel, the surface of panel is provided with main jet nozzle, the inside fixedly connected with the baffle of panel, the inner wall fixedly connected with the gas cylinder of support plate, the output fixedly connected with the push plate of gas cylinder, the inside of push plate is provided with valve needle, the bottom fixedly connected with the guide column of panel, the inner wall fixedly connected with the guide bushing of baffle, the surface of push plate is provided with the slot, the inner wall of slot is provided with the connecting plate, the bottom fixedly connected with the mounting seat of connecting plate, the centre of mounting seat is provided with the screw hole, the inner wall screw -thread connection with the stud of screw hole, the inner wall fixedly connected with the magnetic attraction ring of screw hole, the outer wall of stud is provided with the installation groove, the inner wall sliding connection with the fixed link of stud, the outer wall of fixed link is provided with the fixed spring, the bottom end inner wall rotationally connected with the rotating ball of fixed link, the inner wall sliding connection with the pressure bar of mounting seat, the outer surface fixedly connected with the telescopic spring of pressure bar, the outer wall of valve needle is provided with heating auxiliary assembly.

[0007] As further description of the above technical scheme:

[0008] The fixed link is in the inside of installation groove, and the outer wall of rotating ball is matched with the upper surface of magnetic attraction ring.

[0009] As further description of the above technical scheme:

[0010] The heating auxiliary assembly includes a hot nozzle seat, a hot nozzle body is sleeved with the hot nozzle seat, a hot nozzle nozzle head is fixedly connected to the inner wall of the hot nozzle body, a hot nozzle heat insulation cap is fixedly connected to the bottom of the hot nozzle body, and a hot nozzle heating ring is fixedly connected to the inner wall of the hot nozzle body.

[0011] As further description of the above technical scheme:

[0012] The top end of the hot nozzle seat is fixedly connected with the bottom of the support plate, and the outer wall of the hot nozzle body is fixedly connected with the inner wall of the A plate.

[0013] As further description of the above technical scheme:

[0014] The inner wall of the connecting plate is screw-threaded with a fixed bolt.

[0015] As further description of the above technical scheme:

[0016] The outer wall of the guide column is matched with the inner wall of the guide bushing.

[0017] As further description of the above technical scheme:

[0018] The inner wall of the push plate is rotatably connected to a rotating shaft, the outer wall of the rotating shaft is fixedly connected to a gear, the outer wall of the rotating shaft is driven by a transmission belt, and the bottom of the connecting plate is fixedly connected to a rack.

[0019] As a further description of the above technical solution:

[0020] The rack meshes with the gear.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, by setting up a mounting base, screw hole, stud, magnetic ring, mounting groove, fixing rod, rotating ball, fixing spring, pressure rod, telescopic spring, connecting plate, fixing bolt and heating auxiliary components, it avoids the cylinder not being able to be arranged due to the points being too close, which would affect the sealing needle. It provides quick replacement of a single faulty module for multiple sets of valve needles, and at the same time can quickly replace a batch of valve needles, ensuring the efficiency of subsequent injection molding.

[0023] 2. In this utility model, by setting a rotating shaft, gears, racks and transmission belts, the connecting plate can be lifted up for the operator to hold, giving him a point of force to pull the connecting plate away from the push plate, thus improving the convenience of replacing the valve needle. Attached Figure Description

[0024] Figure 1 This is an external schematic diagram of the main structure of a small-pitch multi-point glue-injection push plate needle valve structure proposed in this utility model.

[0025] Figure 2 This is a partial cross-sectional view of a small-pitch multi-point glue-injection push plate needle valve structure proposed in this utility model;

[0026] Figure 3 This utility model proposes a small-pitch, multi-point glue-feeding push plate needle valve structure. Figure 2 Enlarged view of region A in the middle;

[0027] Figure 4 This is a bottom view of the valve needle structure of a small-pitch multi-point glue-injection push plate needle valve structure proposed in this utility model;

[0028] Figure 5 This is a bottom view of a partial structure of the valve needle in a small-pitch, multi-point glue-injection push plate needle valve structure proposed in this utility model.

[0029] Figure 6 This is a top view of a partial structure of the valve needle in a small-pitch, multi-point glue-injection push plate needle valve structure proposed in this utility model.

[0030] Figure 7 This utility model proposes a small-pitch, multi-point glue-feeding push plate needle valve structure. Figure 6Enlarged view of the middle B region.

[0031] Legend:

[0032] 1, main nozzle; 2, flow distribution plate; 3, hot nozzle position; 4, hot nozzle body; 5, hot nozzle head; 6, hot nozzle heat insulation cap; 7, hot nozzle heating ring; 8, valve needle; 9, air cylinder; 10, push plate; 11, guide column; 12, guide sleeve; 13, mounting seat; 14, screw hole; 15, stud; 16, magnetic attraction ring; 17, mounting groove; 18, fixed rod; 19, rotating ball; 20, fixed spring; 21, pressure rod; 22, extension spring; 23, connecting plate; 24, insertion slot; 25, fixing bolt; 26, rotating shaft; 27, gear; 28, rack; 29, transmission belt; 30, A plate; 31, panel; 32, support plate. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0034] Reference Figures 1-3The utility model provides an embodiment: a kind of small pitch multi-point glue pushing plate needle valve structure, including A plate 30, the top of A plate 30 is provided with support plate 32, the top of support plate 32 is provided with support plate 32, the top of support plate 32 is provided with panel 31, the surface of panel 31 is provided with main nozzle 1, main nozzle 1 design, main nozzle 1 heating, into pouring hole 3-5MM, panel 31 inside is fixedly connected with shunt plate 2, the inner wall of support plate 32 is fixedly connected with cylinder 9, the output end of cylinder 9 is fixedly connected with push plate 10, the inside of push plate 10 is provided with valve needle 8, valve needle 8 is driven to lift by cylinder 9 and can enter hot nozzle drag position 3 inside, valve needle 8 is provided with several groups, and several groups valve needle 8 equidistant distribution is at the bottom of push plate 10, valve needle 8 and the number of cavity number setting are equivalent, 1-128 holes, etc., valve needle 8 design, valve needle 8 glue diameter 1-5mm is sealed, and the material is beryllium copper, the bottom of panel 31 is fixedly connected with guide column 11, the inner wall of shunt plate 2 is fixedly connected with guide sleeve 12, the surface of push plate 10 is provided with slot 24, the inner wall of slot 24 is provided with connecting plate 23, the bottom of connecting plate 23 is fixedly connected with mounting seat 13, screw hole 14 is set in the center of mounting seat 13, screw column 15 is screw-connected on the inner wall of screw hole 14, the inner wall of screw hole 14 is fixedly connected with magnetic attraction ring 16, the surface of magnetic attraction ring 16 is provided with the slot of matching rotating ball 19, and rotating ball 19 can be magnetically attracted with magnetic attraction ring 16 to a certain extent, mounting groove 17 is set in the outer wall of screw column 15, fixed rod 18 is slidably connected on the inner wall of screw column 15, fixed spring 20 is sleeved on the outer wall of fixed rod 18, rotating ball 19 is rotatably connected on the inner wall of the bottom end of fixed rod 18, pressure rod 21 is slidably connected on the inner wall of mounting seat 13, telescopic spring 22 is fixedly connected on the outer surface of pressure rod 21, the outer wall of valve needle 8 is provided with heating auxiliary assembly.

[0035] Refer to Figure 4 、 Figures 6-7, the outer wall of the rotating ball 19 is matched with the upper surface of the magnetic attraction ring 16, the heating auxiliary assembly comprises a hot nozzle guide 3, the hot nozzle guide 3 can ensure accurate positioning of the hot nozzle body 4 in the mold, avoid displacement or shaking of the hot nozzle body 4 in the injection molding process, and effectively prevent molten plastic from leaking from the connection between the hot nozzle body 4 and the mold plate in the injection molding process, the hot nozzle body 4 is sleeved with the hot nozzle body 4, the hot runner channel is designed, the diameter of the hot nozzle channel is in the interval of φ8-16, the diameter of the flow distribution plate 2 is in the interval of φ8-22, the hot nozzle body 4 transports molten plastic from the hot runner plate to each cavity of the A plate 20, effectively reduces the pressure loss of plastic in the flow channel, ensures that each injection point obtains uniform pressure, thereby ensuring the consistency of the quality of the injection molded parts, the split design of the hot nozzle body 4 and the flow distribution plate 2 reduces the carbonization probability and facilitates maintenance, the inner wall of the hot nozzle body 4 is fixedly connected with the hot nozzle tip 5, the hot nozzle tip 5 is designed, the diameter of the nozzle glue sealing position is φ12-φ30, the hot nozzle tip 5 is designed, the diameter of the gate is φ15-φ35, the hot nozzle tip 5 is designed, the nozzle core is 1mm-5mm, the material is beryllium copper, the hot nozzle tip 5 guides the molten plastic from the hot runner plate to the cavity of the A plate 20, which ensures that the plastic maintains good fluidity and temperature uniformity when entering the cavity through precise flow channel design, the bottom of the hot nozzle body 4 is fixedly connected with the hot nozzle heat insulation cap 6, the inner wall of the hot nozzle body 4 is fixedly connected with the hot nozzle heating ring 7, the hot nozzle heating ring 7 is an important heating element, which ensures that the plastic in the hot nozzle body 4 always remains in a molten state through heating, thereby avoiding the cooling and solidification of the plastic in the flow channel, the hot nozzle heating ring 7 is designed with high power density, the hot nozzle heating ring 7 is dense at both ends and sparse in the middle (2-5 rings at the head, 2-6 rings at the tail), which reduces the carbonization probability of the hot nozzle body 4, the top end of the hot nozzle guide 3 is fixedly connected with the bottom of the support plate 32, the outer wall of the hot nozzle body 4 is fixedly connected with the inner wall of the A plate 30, the inner wall of the connecting plate 23 is threadedly connected with the fixed bolt 25, the outer wall of the fixed bolt 25 is threadedly connected with the inner wall of the push plate 10, the fixed bolt 25 is rotated out of the push plate 10 to release the fixation between the connecting plate 23 and the push plate 10, the outer wall of the guide column 11 is matched with the inner wall of the guide sleeve 12, the Cr component in the steel material of the hot nozzle body 4, the push plate 10 and the flow distribution plate 2 is in the interval of 3CR-6CR.

[0036] Referring to Figure 5 , the inner wall of the push plate 10 is rotatably connected with the shaft 26, the shaft 26 is provided in two groups, and the two groups of shafts 26 are mirror images arranged with the central axis of the push plate 10 as the axis of symmetry, the outer wall of the shaft 26 is fixedly connected with the gear 27, the outer wall of the shaft 26 is drivingly connected with the transmission belt 29, the bottom of the connecting plate 23 is fixedly connected with the rack 28, the rack 28 is engaged with the gear 27, the gear 27 is driven to rotate by a group of shafts 26, the two groups of shafts 26 are driven to rotate in the same direction through the transmission belt 29, and then the rack 28 engaged therewith is lifted upwards.

[0037] Working principle: the molten plastic enters the shunt plate 2 through the main nozzle 1, and after being heated by the hot nozzle body 4, it flows out through the multiple sets of glue injection holes of the A plate 20, and performs small-pitch multi-point glue pushing operation. When the operation is completed, the valve needle 8 is driven by the cylinder 9 to close the glue injection hole after approaching the hot nozzle body 4, so as to avoid the close distance between the points, which affects the needle sealing effect. When a single valve needle 8 is damaged, manually rotate the fixing bolt 25 out of the push plate 10 to make the connecting plate 23 separate from the push plate 10. At this time, the connecting plate 23 drives the valve needle 8 to rise a distance from the push plate 10. Select the valve needle 8 that needs to be replaced, and simultaneously extrude the pressure rod 21 at both ends of a group of valve needles 8 with one hand. The compression spring 22 is compressed at the same time, and the pressure rod 21 extrudes the fixed rod 18 to make the fixed rod 18 inserted into the installation slot 17. The fixed spring 20 is also in a compressed state. When the elastic force of the fixed spring 20 is not recovered, the other hand rotates the valve needle 8. After the stud 15 rotates, it gradually separates from the threaded hole 14, and the single valve needle 8 is removed from the surface of the connecting plate 23. Reverse the above steps to replace the new valve needle 8. Support the quick disassembly and replacement of single fault module. If all the valve needles 8 need to be replaced, the connecting plate 23 separated from the push plate 10 is sequentially disassembled and replaced. After replacement, the connecting plate 23 is inserted into the insertion slot 24. The rack 28 can be disengaged with the gear 27 at the moment of descending. The gear 27 rotates while driving the shaft 26 to rotate, so that a certain limiting force is formed on the rack 28, avoiding the rapid falling of the connecting plate 23 to cause damage to the valve needle 8, improving the needle valve effect of the push plate 10 in subsequent glue dispensing operation, and ensuring the injection efficiency.

[0038] Finally, it should be pointed out that: the above only describes the preferred embodiments of the present application, and is not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A small-pitch multi-point glue feeding push plate needle valve structure, comprising an A plate (30), the top of the A plate (30) is provided with a support plate (32), the top of the support plate (32) is provided with a support plate (32), the top of the support plate (32) is provided with a face plate (31), characterized in that: The surface of the panel (31) is provided with a main nozzle (1), the inside of the panel (31) is fixedly connected with a shunt plate (2), the inner wall of the supporting plate (32) is fixedly connected with a gas cylinder (9), the output end of the gas cylinder (9) is fixedly connected with a push plate (10), the inside of the push plate (10) is provided with a valve needle (8), the bottom of the panel (31) is fixedly connected with a guide column (11), the inner wall of the shunt plate (2) is fixedly connected with a guide sleeve (12), the surface of the push plate (10) is provided with a slot (24), the inner wall of the slot (24) is provided with a connecting plate (23), the bottom of the connecting plate (23) is fixedly connected with a mounting seat (13), the center of the mounting seat (13) is provided with a threaded hole (14), the inner wall of the threaded hole (14) is threadedly connected with a stud (15), the inner wall of the threaded hole (14) is fixedly connected with a magnetic attraction ring (16), the outer wall of the stud (15) is provided with a mounting groove (17), the inner wall of the stud (15) is slidably connected with a fixing rod (18), the outer wall of the fixing rod (18) is sleeved with a fixing spring (20), the bottom end inner wall of the fixing rod (18) is rotatably connected with a rotating ball (19), the inner wall of the mounting seat (13) is slidably connected with a pressing rod (21), the outer surface of the pressing rod (21) is fixedly connected with a telescopic spring (22), the outer wall of the valve needle (8) is provided with a heating auxiliary assembly. ​ 2. The small-pitch multi-point feeding push-plate needle valve structure according to claim 1, characterized in that: The fixing rod (18) is in the mounting groove (17), and the outer wall of the rotating ball (19) is matched with the upper surface of the magnetic attraction ring (16).

3. The small-pitch multi-point feeding push-plate needle valve structure according to claim 1, characterized in that: The heating auxiliary assembly comprises a heating nozzle seat (3), the heating nozzle seat (3) is sleeved with a heating nozzle body (4), the inner wall of the heating nozzle body (4) is fixedly connected with a heating nozzle tip (5), the bottom of the heating nozzle body (4) is fixedly connected with a heating nozzle heat insulation cap (6), and the inner wall of the heating nozzle body (4) is fixedly connected with a heating nozzle heating ring (7).

4. The small-pitch multi-point feeding push-plate needle valve structure according to claim 3, characterized in that: The top end of the heating nozzle seat (3) is fixedly connected with the bottom of the supporting plate (32), and the outer wall of the heating nozzle body (4) is fixedly connected with the inner wall of the A plate (30).

5. The small-pitch multi-point feeding push-plate needle valve structure according to claim 1, characterized in that: The inner wall of the connecting plate (23) is threadedly connected with a fixing bolt (25).

6. The small-pitch multi-point feeding push-plate needle valve structure according to claim 1, characterized in that: The outer wall of the guide column (11) is matched with the inner wall of the guide sleeve (12).

7. The small-pitch multi-point feeding push-plate needle valve structure according to claim 1, characterized in that: The inner wall of the push plate (10) is rotatably connected with a rotating shaft (26), the outer wall of the rotating shaft (26) is fixedly connected with a gear (27), the outer wall of the rotating shaft (26) is transmissionally connected with a transmission belt (29), and the bottom of the connecting plate (23) is fixedly connected with a rack (28).

8. The small-pitch multi-point feeding push-plate needle valve structure according to claim 7, characterized in that: The rack (28) is engaged with the gear (27).

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