Hot nozzle structure adaptive to glue inlet

Abstract

The utility model relates to a hot nozzle structure adaptive to a glue inlet, which comprises a hot nozzle element arranged in a mold, one end of the hot nozzle element is connected to a pouring runner in the mold, and the other end of the hot nozzle element is connected to the inside of a hot runner power connection plug. The end part of the hot nozzle element is matched with a cavity glue inlet in the hot runner power connection plug after being heated; the hot nozzle element can be attached to the cavity glue inlet and is in a glue sealing state at the moment, residual glue at the end of the hot nozzle element does not need to be removed manually when plastic products with different colors are switched, and convenience is brought to production.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a hot nozzle structure adapted to the injection port. Background Technology

[0002] Hot runner nozzles, also known as hot tip nozzles or hot runner nozzles, primarily function in molds to deliver molten plastic from the manifold to the various mold cavities. One of the main functions of hot runner nozzles is to ensure that the molten plastic maintains the correct processing temperature throughout the injection, holding, and cooling stages of the molding cycle, thus preventing the melt from solidifying in the runner.

[0003] Application announcement number CN111791435A discloses a hot nozzle assembly and a hot runner mold. According to its specification and drawings, the solution is an open-point gate hot runner mold with a sprue sleeve. The sprue sleeve is used to fix and surround the nozzle tip, and the sprue sleeve insulates the molten plastic flowing out of the hot nozzle assembly, so that the heat at the gate is high. However, in current molds, there is a certain gap between the cavity inlet and the end of the hot nozzle. When the same mold is used to manufacture plastic products of different colors, residual plastic is often left between the end of the hot nozzle and the inlet during the switching process, which requires manual cleaning and causes inconvenience to production. Summary of the Invention

[0004] This invention addresses the problem of flow channels in the hot nozzle area of ​​molds by inventing a hot nozzle structure adapted to the inlet. When the heating coil causes the nozzle head to reach the set temperature, the first inclined surface and the first horizontal surface can fit together with the third horizontal surface and the second inclined surface under the action of thermal expansion. At this time, it is in a sealed state. When switching to different colored plastic products, there is no need to manually remove the residual glue.

[0005] The purpose of this invention is achieved through the following technical solution: a hot nozzle structure adapted to a sprue, comprising a hot nozzle element disposed in a mold, one end of the hot nozzle element being connected to the gating channel inside the mold, the other end of the hot nozzle element being connected to the inside of the hot runner power connector, and the end of the hot nozzle element being heated to adapt to the cavity sprue inside the hot runner power connector.

[0006] Preferably, the hot nozzle element is disposed inside the upper pad and the mother template, and the end of the glue inlet hole of the hot nozzle element passes through the surface of the mother template.

[0007] Preferably, the hot nozzle element includes a hot nozzle body, a heating coil, a nozzle head, and a valve needle. The heating coil is connected to one side of the hot nozzle body, and the nozzle head is connected to the other side of the hot nozzle body. The nozzle head is provided with a valve needle for controlling the opening and closing of the gate.

[0008] Preferably, the nozzle head is provided with a first inclined surface, a first horizontal surface and a second horizontal surface, and after the nozzle head is heated, the first inclined surface and the first horizontal surface are in a state of fit with the inlet of the cavity.

[0009] Preferably, the cavity inlet is provided with a third horizontal surface, a fourth horizontal surface and a second inclined surface. After the nozzle head is heated, the first inclined surface is attached to the second inclined surface and the first horizontal surface is attached to the third horizontal surface.

[0010] Preferably, the nozzle head is made of beryllium copper, which is because beryllium copper alloy has good electrical and thermal conductivity.

[0011] Preferably, the gating channel is provided with a sprue sleeve, which is connected to the nozzle of the injection molding machine. This arrangement is to enable the external injection molding machine to heat the plastic and guide it into the gating channel.

[0012] Compared with the prior art, the present invention has the following advantages: 1. When the heating coil makes the nozzle head reach the set temperature, the first inclined surface and the first horizontal surface can be attached to the third horizontal surface and the second inclined surface under the action of thermal expansion. At this time, it is in a sealed state. When switching plastic products of different colors, there is no need to manually remove the residual glue on the first inclined surface and the first horizontal surface, which brings convenience to the production process; 2. On the basis of the aforementioned sealing, the second horizontal surface and the fourth horizontal surface are also in a sealed state. The combination of the two sealed states makes it difficult for the glue to continue to flow in the wrong direction. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present utility model;

[0014] Figure 2 This is a cross-sectional view of the present invention;

[0015] Figure 3 This is a cross-sectional view of the present invention;

[0016] Figure 4 This is a partially enlarged cross-sectional view of the present invention;

[0017] Figure 5 This is a cross-sectional view of the hot nozzle element of this utility model;

[0018] Figure 6 This is a cross-sectional view of the hot runner electrical connector of this utility model.

[0019] The markings in the diagram are as follows: 1. Hot runner element; 11. Hot runner body; 12. Heating coil; 13. Nozzle head; 131. First inclined surface; 132. First horizontal surface; 133. Second horizontal surface; 14. Valve needle; 2. Gating channel; 3. Hot runner power connector; 31. Cavity inlet; 311. Third horizontal surface; 312. Fourth horizontal surface; 313. Second inclined surface; 4. Upper backing plate; 5. Mother mold plate; 6. Sprue sleeve. Detailed Implementation

[0020] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0021] like Figures 1 to 6 As shown, a hot nozzle structure adapted to a sprue includes a hot nozzle element 1 disposed in a mold. One end of the hot nozzle element 1 is connected to the gating channel 2 inside the mold. Specifically, the hot nozzle element 1 is disposed inside the upper backing plate 4 and the mother mold plate 5. The end of the sprue hole of the hot nozzle element 1 passes through the surface of the mother mold plate 5. A sprue sleeve 6 is provided on the gating channel 2. The sprue sleeve 6 is connected to the nozzle of the injection molding machine. In this way, the material delivered by the external injection molding machine will flow into the interior of the gating channel 2 along the sprue sleeve 6, and then the gating channel 2 will distribute it to the interior of each hot nozzle element 1.

[0022] In this embodiment, the other end of the hot nozzle element 1 is connected to the inside of the hot runner connector 3. After heating, the end of the hot nozzle element 1 is adapted to the cavity inlet 31 inside the hot runner connector 3. The hot nozzle element 1 includes a hot nozzle body 11, a heating coil 12, a nozzle head 13, and a valve needle 14. The heating coil 12 is connected to one side of the hot nozzle body 11, and the nozzle head 13 is connected to the other side of the hot nozzle body 11. The nozzle head 13 is provided with a valve needle 14 for controlling the opening and closing of the gate. The nozzle head 13 is provided with a first inclined surface 131 and a first water... The nozzle head 13 has a plane 132 and a second horizontal plane 133. After heating, the first inclined plane 131 and the first horizontal plane 132 are in contact with the cavity inlet 31. Specifically, the cavity inlet 31 has a third horizontal plane 311, a fourth horizontal plane 312 and a second inclined plane 313 inside. After heating, the first inclined plane 131 is in contact with the second inclined plane 313 and the first horizontal plane 132 is in contact with the third horizontal plane 311. The nozzle head 13 is made of beryllium copper, which has good electrical and thermal conductivity. For most nozzle heads 13 on the market, after the heating coil 12 brings the nozzle head 13 to the set temperature, only the second horizontal surface 133 and the fourth horizontal surface 312 are in a sealed state of adhesion. However, the first inclined surface 131 is not adhered to the second inclined surface 313 and the first horizontal surface 132 is not adhered to the third horizontal surface 311. As a result, when the valve needle 14 opens the nozzle head 13 to inject glue into the mother template 5, some residual glue will remain on the first inclined surface 131 and the first horizontal surface 132 of the nozzle head 13. At this time, when switching to different colored plastic products, it is necessary to manually remove the residue on the first inclined surface 131 and the first horizontal surface 132. However, if the first inclined surface 131 and the first horizontal surface 132 on the nozzle head 13 can adhere to the third horizontal surface 311 and the second inclined surface 313 after heating, they will also be in a sealed state. In this case, no excess glue will remain on the first inclined surface 131 and the first horizontal surface 132 during the glue injection process. When designing the nozzle head 13, you only need to extend the first inclined surface 131 and the first horizontal surface 132 upward by one millimeter, and then cut 20 to 30 filaments downward according to the size of the third horizontal surface 311 and the second inclined surface 313 and with heat margin. This allows the nozzle head 13 to adhere to the inside of the cavity glue inlet 31 after heating.

[0023] Working principle and usage of this utility model:

[0024] When designing the nozzle head 13, simply extend the first inclined surface 131 and the first horizontal surface 132 upwards by one millimeter, and then cut 20 to 30 filaments downwards according to the dimensions of the third horizontal surface 311 and the second inclined surface 313, while leaving a heat margin. This causes the valve needle 14 to open the nozzle head 13 to inject glue into the mother template 5. When the heating coil 12 makes the nozzle head 13 reach the set temperature, the first inclined surface 131 and the first horizontal surface 132 can fit into the third horizontal surface 311 and the second inclined surface 313 under the action of thermal expansion. At this time, it is in a sealed state. When switching to different colored plastic products, there is no need to manually remove the residual glue on the first inclined surface 131 and the first horizontal surface 132.

[0025] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A hot nozzle structure adapted to a glue inlet, comprising a hot nozzle element (1) disposed in a mold, characterized in that, One end of the hot nozzle element (1) is connected to the gating channel (2) inside the mold, and the other end of the hot nozzle element (1) is connected to the inside of the hot runner power connector (3). After the end of the hot nozzle element (1) is heated, it is adapted to the cavity inlet (31) inside the hot runner power connector (3).

2. The hot nozzle structure adapted to the glue inlet according to claim 1, characterized in that, The hot nozzle element (1) is disposed inside the upper pad (4) and the mother template (5), and the end of the glue inlet hole of the hot nozzle element (1) passes through the surface of the mother template (5).

3. The hot nozzle structure adapted to the glue inlet according to claim 2, characterized in that, The hot nozzle element (1) includes a hot nozzle body (11), a heating coil (12), a nozzle head (13) and a valve needle (14). The heating coil (12) is connected to one side of the hot nozzle body (11), and the nozzle head (13) is connected to the other side of the hot nozzle body (11). The nozzle head (13) is provided with a valve needle (14) inside to control the opening and closing of the gate.

4. The hot nozzle structure adapted to the glue inlet according to claim 3, characterized in that, The nozzle head (13) is provided with a first inclined surface (131), a first horizontal surface (132), and a second horizontal surface (133). After the nozzle head (13) is heated, the first inclined surface (131) and the first horizontal surface (132) are in a state of contact with the cavity inlet (31).

5. The hot nozzle structure adapted to the glue inlet according to claim 4, characterized in that, The cavity inlet (31) has a third horizontal surface (311), a fourth horizontal surface (312), and a second inclined surface (313). After the nozzle head (13) is heated, the first inclined surface (131) is attached to the second inclined surface (313) and the first horizontal surface (132) is attached to the third horizontal surface (311).

6. The hot nozzle structure adapted to the glue inlet according to claim 5, characterized in that, The nozzle head (13) is made of beryllium copper.

7. The hot nozzle structure adapted to the glue inlet according to claim 6, characterized in that, The gating channel (2) is provided with a gating sleeve (6), which is connected to the nozzle of the injection molding machine.

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