Split type heat nozzle

Abstract

A split type hot nozzle, including first body, second body, gate, nozzle core, glue ring, cover plate seat, flange and heating sleeve, one end of the gate is installed on the first body, the other end of the gate is installed on one end of the second body, the inside of the first body is provided with a first flow channel, the inside of the second body is provided with a second flow channel, and the first flow channel is communicated with the second flow channel through the gate. The utility model discloses a split type hot nozzle according to the above-mentioned content, solves the hot nozzle in the prior art, and the body is usually of integral type structure, the longer the body length is, the greater the deformation amount is when the temperature rises, thereby causing unstable assembly gap and glue leakage phenomenon, not only causing raw material waste, but also polluting the mould and equipment, and even causing part jamming, forcing production interruption, increasing maintenance cost and downtime.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, and in particular to a split-type hot nozzle. Background Technology

[0002] In injection molding, the hot nozzle is a core component that ensures the stable delivery of thermoplastic melt to the mold cavity. Its structural rationality and performance stability are crucial to product quality and production efficiency.

[0003] However, in existing hot runners, the body is usually a one-piece structure. The longer the body, the greater the deformation when the temperature rises, which leads to unstable assembly gaps and glue leakage. This not only wastes raw materials but also contaminates molds and equipment. In severe cases, parts may even jam, forcing production to stop and increasing maintenance costs and downtime. Utility Model Content

[0004] The purpose of this invention is to propose a split-type hot nozzle, which solves the problem that the hot nozzle in the prior art is usually a one-piece structure. The longer the body is, the greater the deformation will be when the temperature rises, which will lead to unstable assembly gaps and glue leakage. This not only wastes raw materials, but also contaminates molds and equipment. In severe cases, it may even cause parts to jam, forcing production to stop and increasing maintenance costs and downtime.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A split-type hot nozzle includes a first body, a second body, a gating nozzle, a nozzle core, a sealing ring, a cover plate seat, a flange, and a heating jacket;

[0007] One end of the gate is installed on the first body, and the other end of the gate is installed on one end of the second body. The first body has a first flow channel inside, and the second body has a second flow channel inside. The first flow channel is connected to one end of the second flow channel through the gate.

[0008] The nozzle core is mounted on the cover plate seat, and the cover plate seat is mounted on the other end of the second body. The nozzle core has a third flow channel inside, and the third flow channel is connected to the other end of the second flow channel. The sealing ring is mounted on the nozzle core.

[0009] The flange is installed on the first body, the heating sleeve is fitted around the outer periphery of the first body, and one end of the heating sleeve is installed on the flange, while the other end of the heating sleeve abuts against the second body.

[0010] Furthermore, the second flow channel is inclined, and a blockage portion is formed at the connection between the two second flow channels.

[0011] Specifically, the nozzle core includes an inlet block, a connecting block, and an outlet head;

[0012] One end of the connecting block is connected to the glue inlet block, and the other end of the connecting block is connected to the glue outlet head. The third flow channel is located inside the glue inlet block, the connecting block, and the glue outlet head, and the third flow channel is inclined.

[0013] The top of the glue inlet block is provided with a glue inlet, and the bottom of the glue outlet head is provided with a glue outlet. One end of the glue inlet is connected to the second flow channel, and the other end of the glue inlet is connected to the glue outlet through the third flow channel.

[0014] Preferably, the cover plate seat is provided with a first mounting groove, and the glue inlet block is installed in the first mounting groove.

[0015] In some embodiments, the cover plate seat is provided with a limiting block, the limiting block is located between the two first mounting slots, and the connecting block can abut against the limiting block.

[0016] Furthermore, the second body is provided with a positioning hole and a second mounting groove, the second mounting groove being located between the two positioning holes, and the two glue injection blocks and the limiting blocking block can be placed in the second mounting groove;

[0017] The cover plate seat is provided with positioning pins. The two positioning pins are located on the front and rear sides of the limiting block. The positioning pins are directly opposite the positioning holes and can be placed inside the positioning holes.

[0018] Specifically, it also includes a locking member. The second body is provided with a second locking hole. The left and right sides of each of the positioning holes are respectively provided with the second locking hole. The cover plate seat is provided with a first locking hole. The first locking hole is directly opposite the second locking hole. One end of the locking member is installed in the first locking hole, and the other end of the locking member is installed in the second locking hole.

[0019] Preferably, the sealing ring is installed on the outer periphery of the dispensing head, and the sealing ring can abut against the connecting block. The sealing ring has a sealing surface, which is used to fit against the inner wall of the mold.

[0020] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0021] The first body and the second body are designed as separate structures by using a first body, a first runner, a second body, a second runner, a sprue, a nozzle, a third runner, a sealing ring, a cover plate seat, a flange, and a heating jacket. The expansion coefficient of the second body is smaller than that of the first body, which ensures that the second body has small dimensional changes when the temperature changes, and that the gaps between the assembly, installation, and connection of the components are stable, reducing glue leakage and jamming. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a split-type hot nozzle according to one embodiment of the present invention;

[0023] Figure 2 This is a structural schematic diagram of a split-type hot nozzle cross-section according to one embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the first mounting slot in one embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the second mounting slot according to one embodiment of the present invention;

[0026] The components include: first body 1, first flow channel 11, second body 2, second flow channel 21, blocking part 22, positioning hole 23, second mounting groove 24, second locking hole 25, gate 3, nozzle core 4, glue inlet block 41, glue inlet 411, connecting block 42, glue outlet head 43, glue outlet 431, third flow channel 44, sealing ring 5, sealing surface 51, cover plate seat 6, first mounting groove 61, limit blocking block 62, positioning pin 63, first locking hole 64, flange 7, and locking component 9. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," "inner side," "outer side," "inner end," "outer end," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0029] In one embodiment of this utility model, such as Figure 1-4As shown, a split-type hot nozzle includes a first body 1, a second body 2, a gating screw 3, a nozzle core 4, a sealing ring 5, a cover plate seat 6, a flange 7, and a heating jacket. One end of the gating screw 3 is installed on the first body 1, and the other end of the gating screw 3 is installed on one end of the second body 2. The first body 1 has a first flow channel 11 inside, and the second body 2 has a second flow channel 21 inside. The first flow channel 11 is connected to one end of the second flow channel 21 through the gating screw 3. The nozzle core 4 is installed on the cover plate seat 6, and the cover plate seat 6 is installed on the other end of the second body 2. The nozzle core 4 has a third flow channel 44 inside, and the third flow channel 44 is connected to the other end of the second flow channel 21. The sealing ring 5 is installed on the nozzle core 4.The flange 7 is installed on the first body 1, and the heating sleeve is fitted around the outer periphery of the first body 1, with one end of the heating sleeve installed on the flange 7 and the other end of the heating sleeve abutting against the second body 2. In this embodiment, the first body 1 and the second body 2 are made of the same material but have different lengths. The length of the first body 1 is greater than the length of the second body 2. By changing their lengths, their coefficients of thermal expansion are changed, making the coefficients of thermal expansion of the first body 1 and the second body 2 different. The coefficient of thermal expansion of the second body 2 is less than that of the first body 1. A smaller coefficient of thermal expansion results in smaller dimensional changes when the temperature changes, ensuring stable gaps between component assembly, installation, and connection, reducing the risk of glue leakage and jamming. The number of the nozzle core 4, the sealing ring 5, and the second flow channel 21 are two each. During installation, the first... Flange 7 is inserted from the bottom of the first body 1 and slides upwards to abut against the top of the first body 1. Then, the heating sleeve is inserted from the bottom of the first body 1 and slides upwards so that the top of the heating sleeve is installed on the flange 7. The heating sleeve is a commercially available copper sleeve heater. The heating sleeve ensures that the thermoplastic melt inside the first body 1 remains in a flowable state through heating. Then, one end of the gate sprue 3 is installed inside the bottom of the first body 1, and the top of the second body 2 is connected to the other end of the gate sprue 3, with the top surface of the second body 2 abutting against the bottom surface of the heating sleeve, thus achieving... In the limiting assembly, specifically, the other end of the gate 3 is installed inside the top of the second body 2, so that the first flow channel 11 of the first body 1 is connected to one end of each of the two second flow channels 21 through the gate 3. A push rod is installed inside the first flow channel 11 of the first body 1, and the end of the push rod is blocked at the connection between the two second flow channels 21 and the gate 3. Then, the two nozzles 4 are installed on the left and right ends of the cover plate seat 6 respectively. After the two nozzles 4 are installed, the cover plate seat 6 is installed from bottom to top on the bottom of the second body 2, so that the third flow channel 44 of the two nozzles 4 is connected to the two second flow channels respectively. The other end of 21 is connected, and finally the two sealing rings 5 ​​are installed on the glue outlets of the two nozzle cores 4 respectively. The function of the sealing rings 5 ​​is to prevent the leakage of plastic melt. During operation, the push rod is moved upward. The end of the push rod cannot block the connection between the two second flow channels 21 and the gate 3. The plastic melt on the outer periphery of the push rod flows downward in the first flow channel 11 and flows through the gate 3 into the two second flow channels 21. The plastic melt flows out from the glue outlet of the two nozzle cores 4 in sequence through the second flow channel 21 and the third flow channel 44. Under the sealing effect of the sealing rings 5, the plastic melt enters the molding cavity of the mold, thereby realizing injection molding.This application utilizes a first body 1, a first flow channel 11, a second body 2, a second flow channel 21, a gate 3, a nozzle 4, a third flow channel 44, a sealing ring 5, a cover plate seat 6, a flange 7, and a heating jacket to achieve a split structure for the first body 1 and the second body 2. Furthermore, the expansion coefficient of the second body 2 is smaller than that of the first body 1, thus ensuring minimal dimensional change in the second body 2 due to temperature variations. This also ensures stable gaps between assembled, installed, and connected components, reducing glue leakage and jamming.

[0030] like Figure 1-2 As shown, the second flow channel 21 is inclined, and a blockage portion 22 is formed at the connection between the two second flow channels 21. In this embodiment, the two second flow channels 21 inside the second body 2 are inclined, and the ends of the two second flow channels 21 are respectively connected through the blockage portion 22. The two second flow channels 21 are symmetrically arranged along the blockage portion 22. During operation, the end of the push rod is placed in the blockage portion 22, thereby achieving the purpose of blocking. When the push rod moves upward, the plastic melt around the push rod flows into the two inclined second flow channels 21 respectively. The inclined second flow channels 21 help to improve the fluidity of the plastic melt and prevent it from being blocked.

[0031] like Figure 2-4 As shown, the nozzle core 4 includes an inlet block 41, a connecting block 42, and an outlet head 43; one end of the connecting block 42 is connected to the inlet block 41, and the other end of the connecting block 42 is connected to the outlet head 43. The third flow channel 44 is disposed inside the inlet block 41, the connecting block 42, and the outlet head 43, and the third flow channel 44 is inclined; the top of the inlet block 41 is provided with an inlet port 411, and the bottom of the outlet head 43 is provided with an outlet port 431. One end of the inlet port 411 is connected to the second flow channel 21, and the other end of the inlet port 411 is connected to the outlet port 42 through the third flow channel 44. In this embodiment, the connecting block 42, the injection block 41, and the ejector head 43 are integrally formed structures. The connecting block 42 and the ejector head 43 are both cylindrical structures, and the injection block 41 is a cuboid structure. The molten plastic enters the third channel 44 from the second flow channel 21 through the injection port 411, and the flowability of the molten plastic is improved by the inclined third flow channel 44. Finally, it enters the molding cavity of the mold from the ejector port 431.

[0032] like Figure 2-3As shown, the cover plate seat 6 is provided with a first mounting groove 61, and the glue inlet block 41 is installed in the first mounting groove 61. In this embodiment, the left and right ends of the cover plate seat 6 are respectively recessed to form the first mounting groove 61, and the glue inlet blocks 41 of the two nozzle cores 4 are respectively installed in the first mounting groove 61, thereby positioning the nozzle core and preventing it from moving or deviating, ensuring the communication between the second flow channel 21 and the third flow channel 44.

[0033] like Figure 2-3 As shown, the cover plate seat 6 is provided with a limiting blocking block 62, which is located between the two first mounting slots 61, and the connecting block 41 can abut against the limiting blocking block 62. In this embodiment, the limiting blocking block 62 is protruding from the center of the top surface of the cover plate seat 6. The limiting blocking block 62 is located between the two first mounting slots 61. After the two nozzle cores 4 are placed in the first mounting slots 61, the two nozzle cores 4 can abut against the limiting blocking block 62, which plays a limiting and blocking role, preventing them from shifting, and making the structure more integrated and compact.

[0034] like Figure 2-3 As shown, the second body 2 is provided with positioning holes 23 and a second mounting groove 24. The second mounting groove 24 is located between the two positioning holes 23, and the two glue injection blocks 41 and the limiting block 62 can be placed in the second mounting groove 24. The cover plate seat 6 is provided with positioning pins 63. The two positioning pins 63 are located on the front and rear sides of the limiting block 62, and the positioning pins 63 are directly opposite the positioning holes 23 and can be placed inside the positioning holes 23. In this embodiment, there are two positioning holes 23 and two positioning pins 63. The second mounting groove 24 is recessed between the two positioning holes 23, and the two positioning pins 63 are located on the front and rear sides of the limiting block 62. During installation, the two positioning pins 63 and the two positioning holes 23 enable the glue injection blocks 41 and the limiting block 62 to be accurately placed in the second mounting groove 24, ensuring the communication between the second flow channel 21 and the third flow channel 44.

[0035] like Figure 1 and 2As shown in Figure -3, the system also includes a locking member 9. The second body 2 has a second locking hole 25. Each positioning hole 23 has a second locking hole 25 on both its left and right sides. The cover plate seat 6 has a first locking hole 64, which is directly opposite the second locking hole 25. One end of the locking member 9 is installed in the first locking hole 64, and the other end of the locking member 9 is installed in the second locking hole 25. In this embodiment, the locking member 9 is a locking screw. There are four locking members 9, four first locking holes 64, and four second locking holes 25. During installation, after the cover plate seat 6 is installed on the second body 2, the four first locking holes 64 are directly opposite the four second locking holes 25. The four locking members 9 are then used for locking and fixing, which is convenient and quick.

[0036] like Figure 2 As shown, the sealing ring 5 is installed on the outer periphery of the dispensing head 43, and the sealing ring 5 can abut against the connecting block 42. The sealing ring 5 has a sealing surface 51, which is used to fit against the inner wall of the mold. In this embodiment, the sealing ring 5 is fitted onto the outer periphery of the dispensing head 43, and the sealing ring 5 abuts against the connecting block 42, thereby ensuring proper installation. Furthermore, the outer periphery of the sealing ring 5 has a sealing surface 51, which can fit against the inner wall of the mold, thereby achieving the purpose of sealing and preventing glue leakage.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A split-type heating nozzle, characterized in that: Includes a first body, a second body, a gating nozzle, a core, a sealing ring, a cover plate seat, a flange, and a heating jacket; One end of the gate is installed on the first body, and the other end of the gate is installed on one end of the second body. The first body has a first flow channel inside, and the second body has a second flow channel inside. The first flow channel is connected to one end of the second flow channel through the gate. The nozzle core is mounted on the cover plate seat, and the cover plate seat is mounted on the other end of the second body. The nozzle core has a third flow channel inside, and the third flow channel is connected to the other end of the second flow channel. The sealing ring is mounted on the nozzle core. The flange is installed on the first body, the heating sleeve is fitted around the outer periphery of the first body, and one end of the heating sleeve is installed on the flange, while the other end of the heating sleeve abuts against the second body.

2. A split-type hot nozzle according to claim 1, characterized in that: The second flow channel is inclined, and a blockage is formed at the connection between the two second flow channels.

3. A split-type hot nozzle according to claim 2, characterized in that: The nozzle core includes an inlet block, a connecting block, and an outlet head; One end of the connecting block is connected to the glue inlet block, and the other end of the connecting block is connected to the glue outlet head. The third flow channel is located inside the glue inlet block, the connecting block, and the glue outlet head, and the third flow channel is inclined. The top of the glue inlet block is provided with a glue inlet, and the bottom of the glue outlet head is provided with a glue outlet. One end of the glue inlet is connected to the second flow channel, and the other end of the glue inlet is connected to the glue outlet through the third flow channel.

4. A split-type hot nozzle according to claim 3, characterized in that: The cover plate seat is provided with a first mounting groove, and the glue inlet block is installed in the first mounting groove.

5. A split-type hot nozzle according to claim 4, characterized in that: The cover plate seat is provided with a limiting block, which is located between the two first mounting slots, and the connecting block can abut against the limiting block.

6. A split-type hot nozzle according to claim 5, characterized in that: The second body is provided with a positioning hole and a second mounting groove. The second mounting groove is located between the two positioning holes, and the two glue injection blocks and the limiting block can be placed in the second mounting groove. The cover plate seat is provided with positioning pins. The two positioning pins are located on the front and rear sides of the limiting block. The positioning pins are directly opposite the positioning holes and can be placed inside the positioning holes.

7. A split-type hot nozzle according to claim 6, characterized in that: It also includes a locking component. The second body is provided with a second locking hole. The left and right sides of each of the positioning holes are respectively provided with the second locking hole. The cover plate seat is provided with a first locking hole. The first locking hole is directly opposite the second locking hole. One end of the locking component is installed in the first locking hole, and the other end of the locking component is installed in the second locking hole.

8. A split-type hot nozzle according to claim 3, characterized in that: The sealing ring is installed on the outer periphery of the dispensing head, and the sealing ring can abut against the connecting block. The sealing ring has a sealing surface, which is used to fit against the inner wall of the mold.

Images