A locking type hot nozzle connection structure

Abstract

The utility model belongs to the field of hot runner technology, and relates to a lock-type hot nozzle connection structure. The utility model eliminates the hot nozzle body thread and the wrench position, reduces the thread biting when the hot nozzle is disassembled and assembled, and can reduce the glue leakage at the connection between the diverter plate and the hot nozzle caused by the thread biting. It includes a hot nozzle body, and the hot nozzle body is movably connected with the diverter plate through a connecting mechanism; the connecting mechanism includes a snap-on insert and a fixed pressure block; the end of the hot nozzle body is installed in the diverter plate mounting hole, the snap-on insert is snapped on the end of the hot nozzle body and the snap-on insert is placed in the diverter plate mounting hole; the fixed pressure block is sleeved on the outer periphery of the snap-on insert and resists the snap-on insert at the same time, and the fixed pressure block is threadedly connected to the inner wall of the diverter plate mounting hole to fix the hot nozzle body. The snap-on insert clamps the hot nozzle groove to prevent the hot nozzle body from sliding and falling off. A threaded hot nozzle fixed pressure block is provided on the outside of the snap-on insert, and the fixed pressure block presses the snap-on insert to fix the hot nozzle.

Description

Technical Field

[0001] The utility model belongs to the technical field of hot runners, in particular to a locking type hot nozzle connection structure. Background Art

[0002] The hot runner ensures that the plastic in the runner and gate remains molten by heating. Since a heating rod and a heating ring are arranged near or in the center of the runner, the entire runner from the nozzle outlet of the injection molding machine to the gate is in a high temperature state, so that the plastic in the runner remains molten. After the machine is shut down, there is no need to open the runner to take out the condensate. When the machine is restarted, it is only necessary to heat the runner to the required temperature. Hot runner technology can save raw materials, reduce costs, shorten the molding cycle, improve machine efficiency, improve the surface quality and mechanical properties of products, and improve the surface aesthetics of injection molded products. However, with the widespread application of hot runner technology, various defects have also appeared in some high-quality plastic parts to varying degrees. The requirements for different products and mold structures are also different. In order to meet customers' high requirements for products and improve market competitiveness, the hot runner system has been developing new structures to meet customer product needs.

[0003] There are two common ways to connect the hot nozzles in the hot runner system. One is the flange type hot nozzle, which is used in the split system. It is fixed by the manifold during installation and cannot be hoisted as a whole. The other is the threaded hot nozzle, which is fixed to the manifold through threaded connection and is used in semi-integrated and integral systems. It is easy to install and can be hoisted as a whole. During maintenance and disassembly, the external threads of the hot nozzle and the internal screws of the manifold are prone to thread biting or thread damage. If the hot nozzle thread is damaged, the hot nozzle body or the manifold needs to be replaced, and the maintenance cost is high. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a locking type hot nozzle connection structure which eliminates the hot nozzle body thread and the wrench position, reduces thread biting during hot nozzle disassembly and assembly, and can reduce glue leakage at the connection between the diverter plate and the hot nozzle caused by thread biting.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A locking type hot nozzle connection structure comprises a hot nozzle body, wherein the hot nozzle body is movably connected to a diverter plate through a connecting mechanism; the connecting mechanism comprises a snap-on insert and a fixed pressure block; the end of the hot nozzle body is installed in a mounting hole of the diverter plate, the snap-on insert is snapped into the end of the hot nozzle body and the snap-on insert is placed in the mounting hole of the diverter plate; the fixed pressure block is sleeved on the outer periphery of the snap-on insert and presses against the snap-on insert at the same time, and the fixed pressure block is threadedly connected to the inner wall of the mounting hole of the diverter plate to fix the hot nozzle body.

[0007] Furthermore, the positioning feature surface of the hot nozzle body cooperates with the diverter plate feature surface I in the diverter plate mounting hole; a card groove is opened circumferentially on the outer wall surface of the hot nozzle body; the snap-on insert includes two semi-circular ring-shaped inserts, and the cross-section of the two inserts is circular when combined; the card block of the insert is engaged in the card groove on the hot nozzle body; the pressure block feature surface of the fixed pressure block abuts against the insert feature surface I of the insert; the external thread of the fixed pressure block is threadedly connected with the internal thread in the diverter plate mounting hole.

[0008] Furthermore, the slot feature surface in the slot is pressed together with the radial positioning surface of the insert; the matching feature surface of the hot nozzle body is pressed together with the insert feature surface II of the insert.

[0009] Furthermore, the glue sealing characteristic surface of the hot nozzle body is pressed and matched with the diverter plate characteristic surface II in the diverter plate installation hole.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The present application is applicable to the fixed connection between the hot nozzle and the manifold of the semi-integrated and integrated systems. The threads and installation wrench positions on the existing hot nozzle body are cancelled, and a snap-on insert is added. The snap-on insert clamps the hot nozzle groove to prevent the hot nozzle body from sliding and falling off. A threaded hot nozzle fixing block is provided on the outside of the snap-on insert. This fixing block presses the snap-on insert to fix and clamp the hot nozzle. The connection structure can increase the diameter of the hot nozzle body, prevent glue leakage, and facilitate disassembly. In addition, the snap-on insert and the threaded fixing block can be used as standard parts for spare warehouses, making replacement more convenient. The diameter of the hot nozzle body becomes smaller, saving raw materials and simplifying processing. In addition, the length of the hot nozzle body is adjustable, which is convenient for adjusting the length of the hot nozzle. If the hot nozzle needs to be shortened, the hot nozzle body can be directly processed for secondary processing to adjust the length of the hot nozzle, saving raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the hot nozzle and the diverter plate in the prior art;

[0013] Figure 2 This is a schematic diagram of the connection and matching structure of the hot nozzle and the diverter plate of the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the diverter plate of the utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the hot nozzle body of the utility model;

[0016] Figure 5 This is a schematic diagram of the fixed pressing block structure of the utility model;

[0017] Figure 6This is a schematic diagram of the exploded structure of the snap-on insert of the utility model;

[0018] Figure 7 It is a schematic diagram of the top view of the structure of the snap-on insert assembly of the utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention but merely represents selected embodiments of the present invention.

[0021] Based on the implementations in the utility model, all other implementations obtained by ordinary technicians in the field under the instructions before making creative work are within the scope of protection of the utility model.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] like Figure 1 , 2 , 3, 4, 5, 6, 7 as shown:

[0026] The hot nozzle body of the present application has no threads or wrench positions, which can reduce the thread biting during the disassembly and assembly of the hot nozzle body, and can reduce the glue leakage at the connection between the manifold and the hot nozzle body caused by the thread biting. In addition, the hot nozzle structure of the present application saves raw materials and has a simple processing technology, and the length of the hot nozzle body can be adjusted, and the structure is better than the existing hot nozzle structure. The external threaded fixing block can be set as a standard part, which is easy to disassemble and replace if damaged.

[0027] A locking type hot nozzle connection structure comprises a hot nozzle body 1, which is movably connected to a diverter plate 2 through a connecting mechanism; the connecting mechanism comprises a snap-on insert 3 and a fixed pressure block 4; the end of the hot nozzle body 1 is installed in a diverter plate mounting hole 21, the snap-on insert 3 is snapped into the end of the hot nozzle body 1 and the snap-on insert 3 is placed in the diverter plate mounting hole 21; the fixed pressure block 4 is sleeved on the outer periphery of the snap-on insert 3 and simultaneously presses against the snap-on insert 3, and the fixed pressure block 4 is threadedly connected to the inner wall of the diverter plate mounting hole 21 to fix the hot nozzle body 1.

[0028] The biggest difference between the present application and the prior art is that the existing hot nozzle body thread and wrench position are eliminated, thereby reducing thread biting during the hot nozzle disassembly and assembly.

[0029] Furthermore, the positioning feature surface 11 of the hot nozzle body 1 cooperates with the diverter plate feature surface Ⅰ211 in the diverter plate mounting hole 21; a slot 12 is circumferentially provided on the outer wall surface of the hot nozzle body 1; the snap-on insert 3 includes two semi-circular inserts 31, and the cross-section of the two inserts 31 is circular after being combined; the block 311 of the insert 31 is engaged in the slot 12 on the hot nozzle body 1; the block feature surface 41 of the fixed pressure block 4 abuts against the insert feature surface Ⅰ312 of the insert 31; the external thread 42 of the fixed pressure block 4 is threadedly connected with the internal thread 212 in the diverter plate mounting hole 21.

[0030] The hot nozzle body of the present application is designed with a slot, and the snap-on insert is composed of two semicircular inserts, which are snapped in the slot of the hot nozzle body to prevent the hot nozzle body from sliding off. A fixed pressure block with a thread is provided on the outside of the snap-on insert, and the fixed pressure block presses the snap-on insert to fix and press the hot nozzle body.

[0031] Furthermore, the slot feature surface 121 in the slot 12 is pressed together with the radial positioning surface 313 of the insert 31 ; the matching feature surface 13 of the nozzle body 1 is pressed together with the insert feature surface II 314 of the insert 31 .

[0032] Furthermore, the glue sealing characteristic surface 14 of the nozzle body 1 is pressed and matched with the manifold characteristic surface II 213 in the manifold mounting hole 21 .

[0033] The installation steps of the lock-type hot nozzle connection structure are as follows: the first step is to position and install the positioning feature surface 11 of the hot nozzle body 1 and the diverter plate feature surface Ⅰ211 of the diverter plate 2; the second step is to install the snap-in insert 3, which is divided into two semi-circular ring-shaped inserts 31, which are symmetrically clamped in the slot 12, and the slot feature surface 121 in the slot 12 is pressed by the radial positioning surface 313 of the snap-in insert 3; the third step is to install the fixed pressure block 4 on the outside of the snap-in insert 3, and the external thread 42 on the fixed pressure block 4 is threadedly connected with the internal thread 212 in the diverter plate mounting hole 21, and tighten and fix it by the wrench position 43 on the fixed pressure block 4; the fourth step is to install the gate, nozzle tip, heater, thermocouple and other conventional accessories, the lock-type hot nozzle connection structure is installed, and then the whole system is installed.

[0034] During use, during the injection molding process, the rubber material enters the injection nozzle flow channel through the ball head of the injection molding machine and the injection nozzle ball head, and then enters each hot nozzle flow channel through the manifold flow channel. The controller controls the valve needle to control the rubber feeding and complete the injection molding. If the thread is bitten or damaged during use, just replace the fixed pressure block. The fixed pressure block is used as a standard part reserve, which not only reduces the maintenance cost of the hot nozzle, but also greatly improves the maintenance efficiency, labor productivity and customer satisfaction.

[0035] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited by the above-mentioned embodiments. Those skilled in the art may make various modifications or variations to the utility model without departing from the technical concept of the utility model, and these modifications or variations certainly fall within the scope of protection of the utility model.

Claims

1. A locking type hot nozzle connection structure, characterized in that: It comprises a hot nozzle body (1), wherein the hot nozzle body (1) is movably connected to a diverter plate (2) via a connecting mechanism; The connection mechanism comprises a snap-on insert (3) and a fixed pressing block (4); The end of the hot nozzle body (1) is mounted in the manifold mounting hole (21), the snap-on insert (3) is snap-fitted to the end of the hot nozzle body (1), and the snap-on insert (3) is placed in the manifold mounting hole (21); The fixed pressure block (4) is sleeved on the outer periphery of the snap-on insert (3) and simultaneously presses against the snap-on insert (3); the fixed pressure block (4) is threadedly connected to the inner wall of the manifold mounting hole (21) to fix the hot nozzle body (1).

2. The locking type hot nozzle connection structure according to claim 1, characterized in that: The positioning characteristic surface (11) of the hot nozzle body (1) cooperates with the manifold characteristic surface I (211) in the manifold mounting hole (21); The outer wall surface of the nozzle body (1) is provided with a slot (12) in the circumferential direction; The snap-on insert (3) comprises two semi-circular inserts (31), and the cross-section of the two inserts (31) is circular when combined; The clamping block (311) of the insert (31) is clamped in the clamping groove (12) on the hot nozzle body (1); The pressure block characteristic surface (41) of the fixed pressure block (4) abuts against the insert characteristic surface I (312) of the insert (31); The external thread (42) of the fixed pressing block (4) is threadably connected to the internal thread (212) in the manifold mounting hole (21).

3. The locking type hot nozzle connection structure according to claim 2, characterized in that: The slot characteristic surface (121) in the slot (12) and the radial positioning surface (313) of the insert (31) are pressed together; The matching characteristic surface (13) of the hot nozzle body (1) and the insert characteristic surface II (314) of the insert (31) are matched and pressed tightly.

4. The locking type hot nozzle connection structure according to claim 3, characterized in that: The glue sealing characteristic surface (14) of the hot nozzle body (1) is pressed and fitted with the diverter plate characteristic surface II (213) in the diverter plate mounting hole (21).

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