Adjustable runner system of injection mold

Abstract

The utility model discloses an adjustable runner system of an injection mold. The adjustable runner system comprises a flow guide block and a worm assembly, guide blocks are slidably connected to the left end and the right end in the flow guide block, adjusting columns are arranged at the ends, close to the transverse center of the flow guide block, of the guide blocks and matched with flow guide holes in the flow guide block, arc-shaped grooves are formed in the ends, away from the guide blocks, of the adjusting columns, and eccentric shafts are rotatably connected to the left end and the right end of the flow guide block; the lower ends of the two eccentric shafts are both in sliding connection with the vertically-corresponding flow guide blocks, and scale rings are arranged in the middles of the outer arc faces of the two eccentric shafts. According to the adjustable runner system of the injection mold, the eccentric shaft is driven through the worm structure, the adjusting column is controlled to move, the section of the runner is adjusted, the mold does not need to be disassembled during adjustment, meanwhile, the self-locking function is achieved, and the convenience during debugging of the injection mold is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely is adjustable runner system of injection mold. BACKGROUND

[0002] Injection mold is an industrial mold, and is indispensable equipment in industrial production, and its runner system is an important component of injection mold, and the runner system leads molten plastic from injection machine glue to every mold cavity of the mold, and the existing mold runner is generally produced by machining, and generally lacks adjusting structure in the middle, and it is inconvenient to repeatedly repair and process and debug the runner during the debugging of the injection mold, and some can be adjusted, and in the prior art, the patent with the authorized publication number CN 206374143 U discloses a runner adjusting valve of injection mold, the adjusting block is fastened through a screw, the screw needs to be loosened during the adjusting process, and the adjusting block is moved and locked, although repeated processing and repairing are avoided, but the adjusting process is still relatively cumbersome, and there is still room for improvement. SUMMARY

[0003] The utility model solves the technical problem of overcoming the defects of the prior art, provides adjustable runner system of injection mold, drives eccentric shaft through worm structure, controls adjusting column to move, realizes the adjustment of runner section, and the scale ring is convenient for confirming the position of the adjusting column, and the mold does not need to be disassembled during the adjusting, and has self-locking function, greatly improves the convenience of the injection mold during the debugging, and can effectively solve the problems in the background art.

[0004] To achieve the above object, the utility model provides the following technical scheme: adjustable runner system of injection mold, including guide block and worm assembly;

[0005] The left and right ends in the guide block are slidably connected with guide blocks, one end of the guide block close to the horizontal center is provided with an adjusting column, the adjusting column is matched with the guide hole in the guide block, one end of the adjusting column away from the guide block is provided with an arc slot, the left and right ends of the guide block are rotatably connected with eccentric shafts, the lower ends of the two eccentric shafts are slidably connected with the vertically corresponding guide blocks, and the middle part of the outer arc surface of the two eccentric shafts is provided with a scale ring.

[0006] The worm assembly is used for driving the rotation and self-locking of the eccentric shaft, the eccentric shaft is driven through the worm structure, the adjusting column is controlled to move, the adjustment of the runner section is realized, the scale ring is convenient for confirming the position of the adjusting column, the mold does not need to be disassembled during the adjusting, and has self-locking function, greatly improves the convenience of the injection mold during the debugging.

[0007] Furthermore, the eccentric shaft includes a rotating disk, a pin, and a rectangular block. The rotating disk is rotatably connected to the left and right ends inside the guide block. Pins are provided at the edges of the lower surfaces of the two rotating disks. Rectangular blocks are rotatably connected to the outer arc surfaces of the two pins. The two rectangular blocks are slidably connected to the long sliding holes in the middle of the vertically corresponding guide blocks. The driving connection surface is large, and the stability is good.

[0008] Furthermore, the worm gear assembly includes a worm wheel and a worm. The worm wheel is respectively disposed on the upper end of the rotating disk, and the two worms are respectively rotatably connected to the left and right ends inside the guide block. The worm wheel is respectively meshed with the longitudinally corresponding worm, which facilitates the control of the rotation and locking of the rotating disk.

[0009] Furthermore, the worm gear assembly also includes knobs, which are respectively located at the end of the worm gear away from the guide block, to facilitate control of the rotation of the worm gear.

[0010] Furthermore, the worm gear assembly also includes hexagonal holes, which are respectively opened at the end of the knob away from the worm gear, to facilitate control of the knob's rotation.

[0011] Furthermore, a main channel pipe is provided at the main channel hole on the upper surface of the guide block, and the outer arc surface of the main channel pipe is fixedly connected to the inner arc wall of the upper panel. A branch channel pipe is provided at the two branch channel holes on the lower surface of the guide block, and both branch channel pipes are fixedly connected to the upper mold. The upper surface of the upper mold and the lower surface of the upper panel are fixedly connected by a strip plate to facilitate the entry and discharge of molten plastic.

[0012] Furthermore, the flow guide block has evenly distributed heating tubes inside. Heating sleeves are fixedly fitted on the outside of the two branch channels and the main channel. Insulation sleeves are fixedly fitted on the outside of the three heating sleeves. The upper insulation sleeve is fixedly connected to the upper panel, and the lower insulation sleeve is fixedly connected to the upper mold. The flow guide block and the three insulation sleeves are equipped with thermocouples inside. The output end of the thermocouple is electrically connected to the input end of an external controller. The input ends of the heating tubes and the three heating sleeves are electrically connected to the output end of an external controller, which facilitates the heating and heat preservation of the molten plastic.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The adjustable runner system of this injection mold has the following advantages:

[0014] The eccentric shaft is driven by a worm gear structure, which controls the movement of the adjusting column to adjust the flow channel cross-section. At the same time, the scale ring makes it easy to confirm the position of the adjusting column. The adjustment does not require disassembling the mold and has a self-locking function, which greatly improves the convenience of injection mold debugging and helps to improve the injection quality of the mold. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the flow guide block of this utility model;

[0017] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0018] Figure 4 This is an enlarged structural diagram of section B of the present invention.

[0019] In the diagram: 1. Top panel, 2. Guide block, 3. Upper mold, 4. Main channel pipe, 5. Branch channel pipe, 6. Adjusting column, 7. Guide block, 8. Eccentric shaft, 81. Rotary disk, 82. Pin, 83. Rectangular block, 9. Worm gear assembly, 91. Worm wheel, 92. Worm, 93. Knob, 94. Hexagonal hole, 10. Arc groove, 11. Scale ring, 12. Heating jacket, 13. Insulation jacket, 14. Thermocouple, 15. Heating tube. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-4 This embodiment provides a technical solution: an adjustable flow channel system for an injection mold, including a flow guide block 2 and a worm gear assembly 9;

[0022] Guide block 2: Guide blocks 7 are slidably connected to both the left and right ends of the guide block 2. An adjusting post 6 is provided at the end of each guide block 7 near the lateral center of the guide block 2. The adjusting post 6 is configured to cooperate with the guide holes inside the guide block 2. The guide block 7 moves laterally along the guide block 2, causing the guide block 2 to drive the adjusting post 6 to slide along the guide holes, thereby adjusting the cross-section at the corner of the branch hole. This facilitates the adjustment of the molten plastic entering the two mold cavities. An arc-shaped groove 10 is provided at the end of the adjusting post 6 away from the guide block 7. The arc-shaped groove 10 is positioned from top to bottom away from the lateral center of the guide block 2. The arc-shaped groove 10 can guide the molten plastic and reduce the generation of dead angles. An eccentric shaft is rotatably connected to both the left and right ends of the guide block 2. 8. The lower ends of the two eccentric shafts 8 are slidably connected to the vertically corresponding guide blocks 2. A scale ring 11 is provided in the middle of the outer arc surface of each of the two eccentric shafts 8. Observation holes corresponding to the scale ring 11 are opened on the left and right sides of the guide blocks 2. The scale ring 11 facilitates the determination of the position of the adjusting column 6. The eccentric shaft 8 includes a rotating disk 81, a pin 82, and a rectangular block 83. The rotating disk 81 is rotatably connected to the left and right ends inside the guide block 2. Pins 82 are provided at the edges of the lower surfaces of the two rotating disks 81. Rectangular blocks 83 are rotatably connected to the outer arc surface of each of the two pins 82. Both rectangular blocks 83 are slidably connected to the long sliding hole in the middle of the vertically corresponding guide block 7. The rotating disk 81 drives the pin 82 to move in a circular motion. Shaft 82 drives rectangular block 83 to move laterally and longitudinally. Rectangular block 83 rotates relative to shaft 82 and slides relative to the long sliding hole in the middle of guide block 7. Main channel pipe 4 is provided at the main channel hole on the upper surface of guide block 2. The nozzle of injection molding machine injects molten plastic into the interior of main channel pipe 4. The outer arc surface of main channel pipe 4 is fixedly connected to the inner arc wall of upper panel 1. Upper panel 1 provides support for main channel pipe 4. The nozzle of injection molding machine injects molten plastic into the interior of main channel pipe 4. Branch channel pipes 5 are provided at the two branch channel holes on the lower surface of guide block 2. Molten plastic is diverted into branch channel pipes 5 through the guide holes inside guide block 2. Both branch channel pipes 5 are connected to upper mold 3. The molten plastic is fixedly connected to the mold cavity of the upper mold 3. The upper surface of the upper mold 3 and the lower surface of the upper panel 1 are fixedly connected by a strip plate. The interior of the guide block 2 is provided with uniformly distributed heating tubes 15. The exterior of the two branch channel pipes 5 and the main channel pipe 4 are all fixedly fitted with heating sleeves 12. The exterior of the three heating sleeves 12 are all fixedly fitted with heat insulation sleeves 13. The upper heat insulation sleeve 13 is fixedly connected to the upper panel 1, and the lower heat insulation sleeve 13 is fixedly connected to the upper mold 3. The interior of the guide block 2 and the three heat insulation sleeves 13 is provided with thermocouples 14. The output end of the thermocouple 14 is electrically connected to the input end of the external controller. The input ends of the heating tubes 15 and the three heating sleeves 12 are all electrically connected to the output end of the external controller.

[0023] Worm Gear Assembly 9: Used to drive the rotation and self-locking of the eccentric shaft 8. Worm Gear Assembly 9 includes a worm wheel 91 and a worm 92. The worm wheel 91 is respectively set at the upper end of the rotating disk 81. The two worms 92 are respectively rotatably connected to the left and right ends inside the guide block 2. The worm wheel 91 is respectively meshed with the longitudinally corresponding worm 92. The worm 92 drives the rotating disk 81 to rotate through the worm wheel 91. Worm Gear Assembly 9 also includes a knob 93. The knob 93 is respectively set at the end of the worm 92 away from the guide block 2. The knob 93 drives the worm 92 to rotate. Worm Gear Assembly 9 also includes a hexagonal hole 94. The hexagonal hole 94 is respectively opened at the end of the knob 93 away from the worm 92. An Allen wrench is inserted into the hexagonal hole 94 to rotate the knob 93.

[0024] The working principle of the adjustable runner system for injection molds provided by this utility model is as follows: During use, the injection molding machine's nozzle injects molten plastic into the main runner 4. Then, under pressure, the molten plastic is diverted through the guide holes inside the guide block 2 into the branch runners 5, and subsequently enters the mold cavity of the upper mold 3. During use, the amount of molten plastic entering the two branch runners 5 can be adjusted. For adjustment, an Allen wrench can be inserted into the hexagonal hole 94 to rotate the knob 93. The knob 93 drives the worm gear 92 to rotate, which in turn drives the rotating disk 81 to rotate via the worm wheel 91. The rotating disk 81 drives the pin 82 to move circumferentially, and the pin 82 drives the rectangular block 83 to move laterally and longitudinally. The rectangular block 83 rotates relative to the pin 82. The guide block 7 slides relative to the long sliding hole in the middle, and at the same time drives the guide block 7 to move laterally along the guide block 2. The guide block 2 drives the adjusting column 6 to slide along the guide hole, thereby adjusting the cross section at the corner of the branch hole. When the cross section in the middle of the injection channel becomes smaller, the flow resistance of the molten plastic in the channel will increase, resulting in a slower conveying speed. This facilitates the adjustment of the molten plastic entering the two mold cavities, ensuring good injection quality in both mold cavities. The heating jacket 12 and heating tube 15 heat and keep the flowing molten plastic warm. The heat insulation jacket 13 is a polyimide heat insulation jacket. A polyimide heat insulation pad is provided at the connection between the guide block 2, the branch channel tube 5, and the upper mold 3 to reduce heat loss. The thermocouple 14 converts the temperature signal into an electrical signal and transmits it to the external controller for easy detection of the molten plastic temperature.

[0025] It is worth noting that the heating jacket 12, heating tube 15 and thermocouple 14 disclosed in the above embodiments can be freely configured according to the actual application scenario. The heating jacket 12 can be a spring heating coil, the heating tube 15 can be a single-ended heating tube, and the thermocouple 14 can be a K-type thermocouple. The external controller controls the operation of the heating jacket 12, heating tube 15 and thermocouple 14 using methods commonly used in the prior art.

[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An adjustable runner system for an injection mold, characterized by: The guide block (2) and the worm assembly (9) are included. The guide block (2) is internally slidably connected with guide blocks (7) at left and right ends, and the guide blocks (7) are provided with adjusting columns (6) at ends close to the horizontal center of the guide block (2), the adjusting columns (6) are matched with the guide holes in the guide block (2), the adjusting columns (6) are provided with arc grooves (10) at ends away from the guide blocks (7), the guide block (2) is rotatably connected with eccentric shafts (8) at left and right ends, the lower ends of the two eccentric shafts (8) are slidably connected with the vertically corresponding guide blocks (2), and the middle portions of the outer arcs of the two eccentric shafts (8) are provided with scale rings (11). The worm assembly (9) is used for driving the rotation and self-locking of the eccentric shaft (8).

2. An adjustable runner system for an injection mold according to claim 1, wherein: The eccentric shaft (8) comprises rotary discs (81), pin shafts (82) and rectangular blocks (83), the rotary discs (81) are rotatably connected at left and right ends in the guide block (2), the pin shafts (82) are arranged at edges of lower surfaces of the two rotary discs (81), the rectangular blocks (83) are rotatably connected to outer arcs of the two pin shafts (82), and the two rectangular blocks (83) are slidably connected with long sliding holes in the middle portions of the vertically corresponding guide blocks (7).

3. An adjustable runner system for an injection mold according to claim 2, wherein: The worm assembly (9) comprises worm wheels (91) and worms (92), the worm wheels (91) are arranged at upper ends of the rotary discs (81), the two worms (92) are rotatably connected at left and right ends in the guide block (2), and the worm wheels (91) are meshingly connected with the longitudinally corresponding worms (92).

4. An adjustable runner system for an injection mold according to claim 3, wherein: The worm assembly (9) further comprises knobs (93), and the knobs (93) are arranged at ends of the worms (92) away from the guide block (2).

5. An adjustable runner system for an injection mold according to claim 4, wherein: The worm assembly (9) further comprises hexagonal holes (94), and the hexagonal holes (94) are arranged at ends of the knobs (93) away from the worms (92).

6. An adjustable runner system for an injection mold according to claim 1, wherein: A main flow channel pipe (4) is arranged at the main flow channel hole in the upper surface of the guide block (2), the outer arc surface of the main flow channel pipe (4) is fixedly connected with the inner arc wall of the upper panel (1), two branch flow channel pipes (5) are arranged at the two branch flow channel holes in the lower surface of the guide block (2), the two branch flow channel pipes (5) are fixedly connected with the upper die (3), and the upper surface of the upper die (3) and the lower surface of the upper panel (1) are fixedly connected through a strip-shaped plate.

7. An adjustable runner system for an injection mold according to claim 6, wherein: The guide block (2) is internally provided with uniformly distributed heating pipes (15), the two branch flow channel pipes (5) and the main flow channel pipe (4) are externally fixedly provided with heating sleeves (12), the three heating sleeves (12) are externally fixedly provided with heat insulation sleeves (13), the upper heat insulation sleeve (13) is fixedly connected with the upper panel (1), the lower heat insulation sleeve (13) is fixedly connected with the upper die (3), the guide block (2) and the three heat insulation sleeves (13) are internally provided with thermocouples (14), the output end of the thermocouple (14) is electrically connected with the input end of an external controller, and the input end of the heating pipe (15) and the three heating sleeves (12) is electrically connected with the output end of the external controller.

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