Hot runner nozzle structure

Abstract

The utility model provides a hot runner nozzle structure, which relates to the hot runner nozzle field, and comprises a nozzle body and a hot runner plate, the outer wall of the upper side of the nozzle body is provided with a clamping groove, the two ends of the clamping groove are provided with positioning holes, the end face of the upper side of the hot runner plate is provided with an abdicating groove, and a bolt is screwed in the abdicating groove. The lower end of the bolt is connected with an eccentric disc, an inserting groove is formed in the hot runner plate, the nozzle body is inserted into the inserting groove, a guide groove is formed in the outer side of the inserting groove, a clamping block is slidably connected into the guide groove, and the clamping block and the clamping groove are clamped in a matched mode. The hot runner nozzle solves the problems that an existing hot runner nozzle structure lacks feasibility, and adopted hydraulic oil is affected by high temperature to cause qualitative change.

Description

Technical Field

[0001] This utility model relates to the field of hot runner nozzle technology, and specifically to a hot runner nozzle structure. Background Technology

[0002] Hot runners are heating systems used in injection molds to inject molten plastic particles into the mold cavity. Hot runner molds are a novel construction that heats the runners and sprues of traditional or three-plate molds, eliminating the need to remove them after each molding cycle. Hot nozzles are part of the hot runner system. A search revealed existing technology (publication number: CN214645505U), which describes "a replaceable hot runner nozzle structure, including a runner plate, a runner plate channel in the middle of the upper end face of the runner plate, an installation groove in the bottom end face of the runner plate, a nozzle body in the installation groove, a nozzle channel on the nozzle body, and L-shaped limiting grooves on the left, right, front, and rear sides of the upper end face of the runner plate. A lifting assembly is provided at the top of each limiting groove. In use, the top of the nozzle body is placed inside the installation groove at the bottom of the runner plate, and the lifting assembly drives the first piston to move downwards. Hydraulic oil is filled between the first and second pistons. When the first piston moves downwards, the hydraulic oil squeezes the second piston towards the nozzle body, and the locking block on the second piston engages with the locking groove on the nozzle body, thereby completing the fixed installation of the nozzle body."

[0003] While existing hot runner nozzle structures achieve easy disassembly and installation, they still have some shortcomings: Firstly, the existing hot runner nozzle structure requires a flat installation within the mold after the hot runner is installed. Therefore, the handwheel and threaded rod involved in this structure protrude outside the hot runner, preventing the hot runner from being flatly embedded inside the mold. This makes the structure impractical. Secondly, prolonged exposure to high temperatures between the pistons causes oil decomposition and deterioration, which in turn alters the compression distance between the pistons, affecting the accuracy and stability of the installation. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, a hot runner nozzle structure is provided to address the lack of feasibility of existing hot runner nozzle structures and the problem of quality changes caused by high temperatures in the hydraulic oil used.

[0005] To achieve the above objectives, a hot runner nozzle structure is provided, comprising: a nozzle body and a hot runner plate. The upper outer wall of the nozzle body is provided with a slot, and positioning holes are provided at both ends of the slot. The upper end face of the hot runner plate is provided with a clearance groove, and a bolt is screwed into the clearance groove. An eccentric disc is connected to the lower end of the bolt. An insertion groove is provided inside the hot runner plate, and the nozzle body is inserted into the insertion groove. A guide groove is provided outside the insertion groove. A locking block is slidably connected inside the guide groove, and the locking block matches and engages with the slot.

[0006] Furthermore, the nozzle body has a flow cavity that penetrates the nozzle body, and the hot runner plate has a flow hole that communicates with the flow cavity.

[0007] Furthermore, the slots are symmetrically formed on the outer circumference of the nozzle body, and the slots are not connected to the flow cavity inside the nozzle body.

[0008] Furthermore, the bottom of the relief groove is provided with a nut, and a bolt is screwed through the nut. A straight hole is opened on the inner end of the relief groove, and the bolt rotates through the straight hole to connect eccentrically with the eccentric plate.

[0009] Furthermore, the card block is designed as an L-shaped structure, and the card block includes a vertical plate, with a horizontal plate connected to the lower end of the vertical plate, and an arc-shaped groove is provided on the inner side of the horizontal plate.

[0010] Furthermore, a spring is provided inside the guide groove, and the spring is located outside the vertical plate and always keeps in contact with the vertical plate.

[0011] Furthermore, the eccentric disk is designed as an elliptical structure, and the eccentric disk always remains in contact with the inner end face of the vertical plate in the guide groove.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. When using, first align the upper end of the nozzle body with the insertion slot and insert it. Then, rotate the bolt to move the eccentric disk downward while keeping the eccentric disk rotating. This causes the short axis side of the eccentric disk to contact the locking block, which then moves inward under the action of the spring, locking the block in the slot. At the same time, the two arc-shaped ends of the locking block are inserted into the positioning holes, which can achieve a convenient and quick connection, avoiding the need for multiple bolts for fixing. When disassembling, simply rotate the bolt to move the eccentric disk upward, causing the long axis side of the eccentric disk to contact the locking block. This pushes the locking block outward to compress the spring, and then it disengages from the slot, allowing the nozzle body to be disassembled.

[0014] 2. The recessed groove ensures that the bolts remain on the outside of the hot runner plate during installation and disassembly, thus avoiding inconvenience when installing the hot runner plate and the mold. The bolt drive structure, along with the eccentric plate and spring, drives the locking block, achieving a fully mechanical installation mode that is not easily damaged by high temperatures and can be used for a long time. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front section structure of an embodiment of the present utility model.

[0016] Figure 2 This is a partial external structural diagram of the nozzle body according to an embodiment of the present utility model.

[0017] Figure 3 This is an embodiment of the present utility model. Figure 1 Schematic diagram of the structure at point A in the middle.

[0018] Figure 4 This is an embodiment of the present utility model. Figure 1 Schematic diagram of the structure at point B.

[0019] Figure 5 This is a schematic diagram of the three-dimensional structure of the card block according to an embodiment of the present utility model.

[0020] In the diagram: 1. Nozzle body; 11. Slot; 12. Positioning hole; 2. Hot runner plate; 21. Bolt; 22. Relief groove; 23. Nut; 24. Eccentric disc; 25. Guide groove; 26. Block; 261. Vertical plate; 262. Horizontal plate; 263. Arc groove; 27. Spring. Detailed Implementation

[0021] Reference Figures 1 to 5 As shown, this utility model provides a hot runner nozzle structure, including: a nozzle body 1 and a hot runner plate 2. The upper outer wall of the nozzle body 1 is provided with a slot 11, and the two ends of the slot 11 are provided with positioning holes 12. The upper end face of the hot runner plate 2 is provided with a relief groove 22, and a bolt 21 is screwed into the relief groove 22. The lower end of the bolt 21 is connected to an eccentric disc 24. The inside of the hot runner plate 2 is provided with an insertion groove, and the nozzle body 1 is inserted into the insertion groove. The outside of the insertion groove is provided with a guide groove 25. The inside of the guide groove 25 is slidably connected with a locking block 26, and the locking block 26 matches and engages with the slot 11.

[0022] In this embodiment, the nozzle body 1 and the hot runner plate 2 constitute the hot runner nozzle structure involved in this application.

[0023] Specifically, the nozzle body 1 is designed with a common nozzle structure for hot runners in molds. The difference from ordinary nozzles in the prior art is that a slot 11 and a positioning hole 12 are provided on the outer wall.

[0024] Specifically, the hot runner plate 2 can be connected to multiple nozzle bodies 1 according to the size of the mold. The connection method between the hot runner plate 2 and multiple nozzle bodies 1 involved in this application is consistent.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, a flow cavity penetrating the nozzle body 1 is provided inside the nozzle body 1, and a flow hole is provided inside the hot runner plate 2, and the flow hole communicates with the flow cavity. The slots 11 are symmetrically provided on the outer circumference of the nozzle body 1, and the slots 11 do not communicate with the flow cavity inside the nozzle body 1. A nut 23 is provided at the bottom of the clearance groove 22, and a bolt 21 is screwed through the nut 23. A straight hole is provided at the inner end of the clearance groove 22, and the bolt 21 rotates through the straight hole and is eccentrically connected to the eccentric plate 24.

[0026] In a preferred embodiment, by providing a flow cavity and a flow hole, the molten raw material flows through the nozzle body 1 and the hot runner plate 2 to the mold.

[0027] As a preferred implementation, by setting the bolt 21 to be eccentrically connected to the eccentric disk 24, the eccentric disk 24 can be rotated to drive the locking block 26.

[0028] like Figure 4 and Figure 5 As shown, the card block 26 is designed with an L-shaped structure and includes a vertical plate 261. The lower end of the vertical plate 261 is connected to a horizontal plate 262. An arc-shaped groove 263 is provided on the inner side of the horizontal plate 262. A spring 27 is provided on the inner side of the guide groove 25. The spring 27 is located on the outer side of the vertical plate 261 and always maintains contact with the vertical plate 261. The eccentric disk 24 is designed with an elliptical structure and always maintains contact with the inner end face of the vertical plate 261 in the guide groove 25.

[0029] Specifically, by setting the card block 26 to align with the card slot 11, the connection between the nozzle body 1 and the hot runner plate 2 is fixed. At the same time, a high-temperature resistant sealing ring is provided in the insertion slot and inside, and the nozzle body 1 is inserted into the inside of the sealing ring.

[0030] In use, first align the upper end of the nozzle body with the insertion slot and insert it. Then, rotate the bolt to move the eccentric disc downwards while maintaining its rotation. This causes the short axis of the eccentric disc to contact the locking block, which in turn moves inwards under the action of the spring, locking the block in the slot. Simultaneously, the two arc-shaped ends of the locking block are inserted into the positioning holes, achieving a convenient and quick connection that avoids the need for multiple bolts for fixing. To disassemble, simply rotate the bolt to move the eccentric disc upwards, causing the long axis of the eccentric disc to contact the locking block. This pushes the locking block outwards, compressing the spring and disengaging it from the slot, allowing the nozzle body to be removed.

[0031] The hot runner nozzle structure of this utility model can effectively solve the problems of lack of feasibility in existing hot runner nozzle structures and the quality change caused by high temperature of the hydraulic oil used. It realizes the increase of the convenience and feasibility of hot runner nozzle disassembly and assembly on the basis of existing hot runner nozzle structure technology, while ensuring service life by using a purely mechanical structure.

Claims

1. A hot runner nozzle structure, comprising: The nozzle body (1) and the hot runner plate (2) are characterized in that: the upper outer wall of the nozzle body (1) is provided with a slot (11), and the two ends of the slot (11) are provided with positioning holes (12); the upper end face of the hot runner plate (2) is provided with a relief groove (22), and a bolt (21) is screwed into the relief groove (22), and the lower end of the bolt (21) is connected to an eccentric disc (24); the inside of the hot runner plate (2) is provided with an insertion groove, and the nozzle body (1) is inserted into the insertion groove; and a guide groove (25) is provided on the outside of the insertion groove; a locking block (26) is slidably connected inside the guide groove (25), and the locking block (26) matches and engages with the slot (11).

2. The hot runner nozzle structure according to claim 1, characterized in that, The nozzle body (1) has a flow cavity that penetrates the nozzle body (1), and the hot runner plate (2) has a flow hole that communicates with the flow cavity.

3. The hot runner nozzle structure according to claim 1, characterized in that, The slots (11) are symmetrically opened on the outer circumference of the nozzle body (1), and the slots (11) are not connected to the flow cavity inside the nozzle body (1).

4. The hot runner nozzle structure according to claim 1, characterized in that, The bottom of the relief groove (22) is provided with a nut (23), and a bolt (21) is screwed through the nut (23). The inner end of the relief groove (22) is provided with a straight hole, and the bolt (21) rotates through the straight hole and is eccentrically connected to the eccentric disk (24).

5. A hot runner nozzle structure according to claim 1, characterized in that, The card block (26) is designed as an L-shaped structure, and the card block (26) includes a vertical plate (261), and the lower end of the vertical plate (261) is connected to a horizontal plate (262), and an arc groove (263) is provided on the inner side of the horizontal plate (262).

6. A hot runner nozzle structure according to claim 1, characterized in that, A spring (27) is provided inside the guide groove (25), and the spring (27) is located outside the vertical plate (261) and always keeps in contact with the vertical plate (261).

7. A hot runner nozzle structure according to claim 1, characterized in that, The eccentric disk (24) is designed as an elliptical structure, and the eccentric disk (24) always maintains contact with the inner end face of the vertical plate (261) in the guide groove (25).

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