A lever cylinder drive system for hot runner

Abstract

The utility model provides a lever formula air cylinder drive system for hot runner, including cylinder, interval setting in the shunt board of cylinder side, the hot nozzle of connecting in the shunt board, remove setting in the shunt board and be used for to the valve needle of hot nozzle carries out the opening and closing control, the output end of cylinder is connected with the connecting rod guide joint, and the connecting rod guide joint is connected with the valve needle between the rocker arm, to make the connecting rod guide joint can drive the valve needle and remove, the utility model discloses can prevent the high temperature ageing condition that cylinder part is subjected to, and can avoid the influence that cylinder installation position is subjected to mould structure.

Description

Technical Field

[0001] This utility model relates to the field of injection molding equipment, and in particular to a lever-type cylinder drive system for hot runners. Background Technology

[0002] In hot runner technology applications, the needle valve hot runner system is one of the commonly used systems. This system opens or closes the hot nozzle mechanically within a predetermined time by the action of a valve needle on a cylinder piston. The piston structure commonly used in these control devices is equipped with a sealing ring to prevent air leakage. However, in this type of hot runner, the cylinder is located above and close to the manifold, making it susceptible to the high temperature of the manifold. This is mainly because the sealing rings are made of rubber, which is prone to aging and failure under high-temperature conditions for extended periods, leading to air leakage and affecting normal operation.

[0003] Furthermore, adopting a cylinder needle valve hot runner system requires a corresponding increase in the total thickness of the mold. This can lead to insufficient spacing between multiple feed points, making it impossible to place the cylinder, or the increased structure of the mold itself may prevent the placement of the cylinder. Utility Model Content

[0004] The purpose of this invention is to provide a lever-type cylinder drive system for hot runners that can prevent cylinder parts from aging due to high temperatures and avoid the cylinder mounting position being affected by the mold structure.

[0005] To solve the above-mentioned technical problems, this utility model provides a lever-type cylinder drive system for hot runners, including a cylinder, a manifold plate spaced apart on the side of the cylinder, a hot nozzle connected to the manifold plate, and a valve needle movably disposed on the manifold plate for controlling the opening and closing of the hot nozzle. The output end of the cylinder is connected to a connecting rod guide joint, and a rocker arm is connected between the connecting rod guide joint and the valve needle so that the connecting rod guide joint can drive the valve needle to move.

[0006] Furthermore, the cylinder and the manifold are connected by a bracket, and a fixed pin is provided at the middle of the rocker arm, with both ends of the fixed pin rotating in coordination with the bracket.

[0007] Furthermore, a guide adjustment block is rotatably provided at one end of the rocker arm near the valve needle. An adjustment groove is provided on the inner side of the guide adjustment block. The valve needle seat is movably connected in the adjustment groove, and the end of the valve needle is engaged with the valve needle seat.

[0008] Furthermore, a retaining member is movably connected to one end of the adjusting groove so that the retaining member can tighten and fix the valve needle seat.

[0009] Furthermore, the guide adjustment block is rotatably engaged with the rocker arm on both sides via guide blocks, and a first guide groove is provided on the side of the bracket, with the guide block and the first guide groove being movablely engaged.

[0010] Furthermore, the connecting rod guide joint is rotatably engaged with the rocker arm on both sides via guide pins, and a second guide groove is provided on the side of the bracket, with the guide pin and the second guide groove being movablely engaged.

[0011] Furthermore, the bracket is provided with several fixed shafts on its side, and the fixed shafts are connected to the cylinder by a fixing component.

[0012] Furthermore, the bracket is mounted on the side of the diverter plate via a positioning element, and a heat insulation pad is provided between the bracket and the diverter plate.

[0013] Furthermore, the bracket is detachably connected to baffles on both sides near the connecting rod guide joint and the valve needle.

[0014] The beneficial effects of this utility model are as follows: When controlling the opening and closing state of the hot nozzle by the valve, the connecting rod guide joint can be moved telescopically by the cylinder, thereby driving the rocker arm to swing in a lever-like manner. When the connecting rod guide joint is raised, the valve needle is pressed simultaneously, causing the valve to close the hot nozzle. When the connecting rod guide joint is lowered, the valve needle is raised simultaneously, causing the valve to open the hot nozzle. Due to the spacing between the cylinder and the manifold, the high temperature at the manifold can be effectively avoided from affecting the cylinder components. Furthermore, since only the rocker arm needs to be set on the side of the manifold to connect with the valve needle, the arrangement of the cylinder will not be affected by the structure of the mold itself. 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 rocker arm in this utility model.

[0017] Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0018] Reference numerals: 1. Cylinder; 2. Fixing component; 3. Fixing shaft; 4. Guide pin; 5. Bracket; 6. Fixing pin; 7. Guide block; 8. Diverter plate; 9. Hot nozzle; 10. Connecting rod guide joint; 11. Rocker arm; 12. Guide adjusting block; 13. Baffle; 14. Fastening component; 15. Valve needle seat; 16. Valve needle; 17. Positioning component; 18. Heat insulation pad; 19. Adjusting groove; 20. First guide groove; 21. Second guide groove. Detailed Implementation

[0019] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0020] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0021] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0022] like Figures 1-3 The present invention provides a lever-type cylinder drive system for hot runners, including a cylinder 1, a manifold 8 spaced apart on the side of the cylinder 1, a hot nozzle 9 connected to the manifold 8, and a valve needle 16 movably disposed on the manifold 8 for opening and closing control of the hot nozzle 9. The output end of the cylinder 1 is connected to a connecting rod guide joint 10, and a rocker arm 11 is connected between the connecting rod guide joint 10 and the valve needle 16 so that the connecting rod guide joint 10 can drive the valve needle 16 to move.

[0023] When controlling the opening and closing state of the hot nozzle by means of a valve, the connecting rod guide joint can be moved by means of a cylinder to extend and retract, thereby driving the rocker arm to swing in a lever-like manner. When the connecting rod guide joint is raised, the valve needle is pressed simultaneously, so that the valve closes the hot nozzle. When the connecting rod guide joint is lowered, the valve needle is raised simultaneously, so that the valve opens the hot nozzle. Due to the spacing between the cylinder and the manifold, the high temperature at the manifold can be effectively avoided from affecting the cylinder components. Furthermore, since only the rocker arm needs to be set on the side of the manifold to connect with the valve needle, the arrangement of the cylinder is not affected by the structure of the mold itself.

[0024] Among them, the moving and mating position of the valve needle and the flow divider plate is provided with structures such as heat insulation pads and sealing rings.

[0025] Preferably, the cylinder 1 and the flow divider 8 are connected by a bracket 5, and a fixed pin 6 is provided at the middle position of the rocker arm 11, and the two ends of the fixed pin 6 are rotatably engaged with the bracket 5.

[0026] Specifically, the distance between the cylinder and the manifold is maintained by the bracket, thereby preventing the manifold from affecting the cylinder with high temperature. Furthermore, due to the setting of the fixed pin, when the connecting rod guide joint moves up and down, it can drive the rocker arm to swing relative to the bracket through the fixed pin, thereby achieving the purpose of raising and lowering the valve needle.

[0027] Preferably, a guide adjustment block 12 is rotatably provided at one end of the rocker arm 11 near the valve needle 16. An adjustment groove 19 is provided on the inner side of the guide adjustment block 12. The valve needle seat 15 is movably connected in the adjustment groove 19, and the end of the valve needle 16 is engaged with the valve needle seat 15.

[0028] Specifically, during the rocker arm swing, the connection between the rocker arm and the valve needle is maintained by the guide adjustment block. Due to the valve needle seat, after the valve needle is engaged with the valve needle seat, the initial position of the valve needle can be positioned by adjusting the position of the valve needle seat relative to the adjustment groove, so as to ensure the stability of the valve needle in use.

[0029] The valve needle seat and the adjusting groove are threaded together, and the valve needle seat has an internal hexagonal structure on the side away from the valve needle to facilitate the control of the valve needle seat to rotate and adjust its position relative to the adjusting groove.

[0030] In one embodiment of this solution, a T-shaped groove is provided at the end of the valve needle seat, and a matching T-shaped block is provided at the end of the valve needle, so that the end of the valve needle can be engaged in the valve needle seat and driven by the valve needle seat; and since the valve needle seat is located in the adjustment groove, the two sides of the T-shaped groove are limited by the adjustment groove, so that the valve needle will not be disengaged from the valve needle seat.

[0031] Preferably, one end of the adjusting groove 19 is movably connected to a locking member 14 so that the locking member 14 tightens and fixes the valve needle seat 15.

[0032] Specifically, after the valve needle seat positions the valve needle at its initial position, the locking element is screwed into the adjusting groove to tighten and fix the valve needle seat, thereby preventing the valve needle seat from moving the valve needle and improving the relative position stability of the valve needle during use.

[0033] The fastener can be a fastening bolt or other parts, and the fastener and the adjusting groove are threaded together. The end of the fastener is also provided with an internal hexagonal structure.

[0034] Preferably, the guide adjustment block 12 is rotatably engaged with the rocker arm 11 via guide blocks 7 on both sides, and the bracket 5 has a first guide groove 20 on its side, and the guide block 7 is movablely engaged with the first guide groove 20.

[0035] Specifically, the guide adjustment block is designed to rotate with the rocker arm, so that the guide adjustment block always drives the valve needle to move straight up and down during the rocker arm's swing. In conjunction with the first guide groove, the guide block is guided to move, which can improve the accuracy and stability of the guide adjustment block during the up and down movement.

[0036] The first guide groove is positioned horizontally to the valve needle's lifting direction.

[0037] It is worth mentioning that in this solution, while the guide block and the rocker arm are rotating, the guide block and the rocker arm are also in clearance fit. As the rocker arm swings, the horizontal distance between the connection between the rocker arm and the guide adjustment block and the fixed pin will change to a certain extent. At this time, the clearance fit between the guide block and the rocker arm, as well as the guiding effect of the first guide groove, can be used to offset the influence of the change in horizontal distance, so as to ensure the straight up and down movement stroke of the guide adjustment block.

[0038] Preferably, the connecting rod guide joint 10 is rotatably engaged with the rocker arm 11 on both sides by guide pins 4, and the bracket 5 has a second guide groove 21 on its side, and the guide pin 4 is movablely engaged with the second guide groove 21.

[0039] Specifically, when the cylinder controls the connecting rod guide joint to rise and fall, the rotational engagement of the guide pin and the rocker arm is coordinated to allow the connecting rod guide joint to stably control the rocker arm to swing. The guide pin is guided by the second guide groove so that the guide pin can drive the connecting rod guide joint to move straight up and down.

[0040] In this design, the second guide groove is arranged horizontally with the lifting direction of the connecting rod guide joint. In addition, while the guide pin and the rocker arm are rotating, the guide pin and the rocker arm are also in clearance fit. As the horizontal distance between the connection between the rocker arm and the connecting rod guide joint and the fixed pin changes during the swinging process, the clearance fit between the guide pin and the rocker arm, as well as the guiding effect of the second guide groove, can be used to offset the effect of the change in horizontal distance, so as to ensure the straight up and down movement of the guide pins on both sides.

[0041] Preferably, the bracket 5 is provided with a plurality of fixed shafts 3 on its side, and the fixed shafts 3 are connected to the cylinder 1 by a fixing member 2.

[0042] Specifically, the cylinder is connected to the fixed shaft by a fastener to ensure a stable connection between the cylinder and the bracket, thereby improving the stability when the cylinder drives the connecting rod guide joint to operate.

[0043] In one embodiment of this solution, the fastener may be a bolt or other similar component.

[0044] Preferably, the bracket 5 is mounted on the side of the diverter plate 8 via the positioning member 17, and a heat insulation pad 18 is provided between the bracket 5 and the diverter plate 8.

[0045] Specifically, the bracket and the manifold are connected and fixed by the positioning component, so that the manifold and the cylinder can be positioned by the bracket. Furthermore, due to the setting of the heat insulation pad, the heat at the manifold will not dissipate to the bracket, further enhancing the heat insulation and protection effect at the cylinder.

[0046] The positioning components can be bolts or other similar parts.

[0047] Preferably, the bracket 5 is detachably connected to baffles 13 on both sides near the connecting rod guide joint 10 and the valve needle 16.

[0048] Specifically, by setting up baffles, when structures such as connecting rod guide joints and guide adjustment blocks require maintenance, the side of the maintenance structure can be quickly exposed by removing the baffles at the corresponding positions, so as to facilitate maintenance operations without disassembling the brackets or other structures.

[0049] The baffle can be detached and installed using bolts or other connection methods.

[0050] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A lever cylinder drive system for a hot runner characterized by: The device includes a cylinder (1), a flow divider (8) spaced apart on the side of the cylinder (1), a hot nozzle (9) connected to the flow divider (8), and a valve needle (16) movably disposed on the flow divider (8) for controlling the opening and closing of the hot nozzle (9). The output end of the cylinder (1) is connected to a connecting rod guide joint (10), and a rocker arm (11) is connected between the connecting rod guide joint (10) and the valve needle (16) so that the connecting rod guide joint (10) can drive the valve needle (16) to move.

2. The lever cylinder drive system for a hot- flow, as claimed in claim 1, wherein: The cylinder (1) and the flow divider (8) are connected by a bracket (5). A fixed pin (6) is provided in the middle of the rocker arm (11), and the two ends of the fixed pin (6) are rotatably engaged with the bracket (5).

3. The lever cylinder drive system for a hot- flow, as claimed in claim 2, wherein: The rocker arm (11) is rotatably provided with a guide adjustment block (12) near the valve needle (16). An adjustment groove (19) is provided on the inner side of the guide adjustment block (12). The valve needle seat (15) is movably connected in the adjustment groove (19), and the end of the valve needle (16) is engaged with the valve needle seat (15).

4. The lever cylinder drive system for a hot- flow, as claimed in claim 3, wherein: One end of the adjusting groove (19) is movably connected to a fastening member (14) so ​​that the fastening member (14) tightens and fixes the valve needle seat (15).

5. The lever cylinder drive system for a hot- flow, as claimed in claim 3, wherein: The guide adjustment block (12) is rotated with the rocker arm (11) on both sides through the guide block (7), and the bracket (5) has a first guide groove (20) on its side, and the guide block (7) and the first guide groove (20) are movable.

6. The lever cylinder drive system for a hot- flow, as claimed in claim 2, wherein: The connecting rod guide joint (10) is rotatably engaged with the rocker arm (11) on both sides by guide pins (4), and the bracket (5) has a second guide groove (21) on its side, and the guide pin (4) is movablely engaged with the second guide groove (21).

7. The lever cylinder drive system for a hot- flow, as claimed in claim 2, wherein: The bracket (5) is provided with several fixed shafts (3) on its side, and the fixed shafts (3) are connected to the cylinder (1) by a fixing member (2).

8. The lever cylinder drive system for a hot- flow, as claimed in claim 2, wherein: The bracket (5) is mounted on the side of the diversion plate (8) by a positioning member (17), and a heat insulation pad (18) is provided between the bracket (5) and the diversion plate (8).

9. The lever-type cylinder drive system for hot runners according to claim 2, characterized in that: The bracket (5) is detachably connected to baffles (13) on both sides near the connecting rod guide joint (10) and the valve needle (16).

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