A side gate hot runner

Abstract

The utility model discloses a side gate hot runner, which includes a runner body, a gate sleeve and a heating coil; a material channel is formed in the runner body, a mounting surface is provided on the side of the runner body, an angle α is formed between the mounting surface and the inlet of the material channel, 0°≤α≤90°, a gate sleeve is provided on the mounting surface, a feed port of the gate sleeve is connected with an outlet of the material channel; the heating coil is wound on the outer side wall of the runner body. The side gate hot runner of the utility model can realize direct side injection through structural design, which can not only save materials and reduce injection molding costs, but also will not produce gate material, and at the same time, will not be troubled by the flow length ratio, so that the product is easy to form and the quality of the produced products is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding, in particular to a side gate hot runner. Background Art

[0002] The existing material channel system is limited by its structure and can only be injected by front injection, resulting in a small scope of application. For some products that require side injection, the only way is to convert the hot runner to the cold runner. This method not only wastes materials and increases the injection molding cost, but also produces gate material, making the quality of the produced products low, especially when using engineering plastics with a small flow length ratio for injection molding, the product is difficult to mold.

[0003] Therefore, the existing technology needs to be improved and developed. Utility Model Content

[0004] The utility model aims to provide a side gate hot runner, which can realize direct side injection of glue, save materials and reduce injection molding costs, and does not produce gate material.

[0005] The utility model provides a side gate hot runner, which includes: a runner body, a gate sleeve and a heating coil; a material channel is formed in the runner body, a mounting surface is provided on the side of the runner body, an angle α is formed between the mounting surface and the inlet of the material channel, 0°≤α≤90°, the gate sleeve is arranged on the mounting surface, and the feed port of the gate sleeve is connected with the outlet of the material channel; the heating coil is wound on the outer wall of the runner body.

[0006] According to an embodiment of the present invention, the side gate hot runner further comprises a pressing block, which abuts against an active surface of the runner body away from the mounting surface and is movable along a first direction of the runner body.

[0007] According to an embodiment of the present invention, the above-mentioned active surface includes a first surface, a second surface and a third surface connected in sequence, the first surface and the third surface are straight surfaces, and the second surface is an inclined surface, so that a first distance is formed between the first surface and the third surface.

[0008] According to an embodiment of the present invention, the above-mentioned active surface further includes a fourth surface and a fifth surface connected in sequence, the fourth surface is connected to the third surface, and the fourth surface is an inclined surface so that a second distance is formed between the third surface and the fifth surface.

[0009] According to one embodiment of the present invention, the flow channel body is in the shape of a long flat strip.

[0010] According to one embodiment of the utility model, the outer side wall of the flow channel body is provided with a mounting groove matched with the shape of the heating coil, and the heating coil is located in the mounting groove.

[0011] According to one embodiment of the present invention, a temperature-sensitive wire is wound around the outer wall of the flow channel body.

[0012] According to an embodiment of the present invention, a wire groove is provided on the outer side wall of the flow channel body, and the temperature sensing wire is located in the wire groove.

[0013] According to an embodiment of the present utility model, a sealing groove is provided on the flow channel body, and the sealing groove surrounds the inlet of the material channel.

[0014] According to one embodiment of the present invention, the sprue sleeve has a plurality of discharge ports, and the plurality of discharge ports are evenly distributed.

[0015] The beneficial effects of the utility model are as follows: the side gate hot runner of the utility model can realize direct side injection of glue by setting the gate sleeve on the installation surface which is at an angle of α with the entrance of the material channel. Compared with the method of converting the hot runner to the cold runner, it can not only save materials and reduce the injection molding cost, but also will not produce gate materials. At the same time, it will not be troubled by the flow length ratio, so that the product is easy to mold and the quality of the produced products is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 It is a structural schematic diagram of a hot runner to a cold runner in the prior art;

[0018] Figure 2 It is a schematic diagram of the structure of the side gate hot runner with an α angle of 0° in the embodiment of the utility model;

[0019] Figure 3 It is a front structural schematic diagram of a side gate hot runner with an α angle of 45° in an embodiment of the utility model;

[0020] Figure 4 It is a cross-sectional view of the flow channel body with an angle α of 45° in the embodiment of the utility model;

[0021] Figure 5 It is a schematic diagram of the structure of the side gate hot runner and the mold core in the embodiment of the utility model;

[0022] Figure 6It is a cross-sectional view of the cooperation between the side gate hot runner and the mold core in the embodiment of the utility model;

[0023] Figure 7 It is a schematic diagram of the back structure of the side gate hot runner with an α angle of 45° in an embodiment of the utility model.

[0024] Description of reference numerals:

[0025] 1. Runner body; 11. Material channel; 12. Mounting surface; 13. Action surface; 131. First surface; 132. Second surface; 133. Third surface; 134. Fourth surface; 135. Fifth surface; 14. Mounting groove; 15. Wire groove; 16. Sealing groove; 2. Gate sleeve; 21. Discharge port; 3. Heating coil; 4. Press block; 5. Temperature sensing line; A. First distance; B. Second distance. DETAILED DESCRIPTION

[0026] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0029] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0030] like Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 As shown, the utility model provides a side gate hot runner, comprising a runner body 1, a gate sleeve 2 and a heating coil 3. A material channel 11 is formed in the runner body 1, and a mounting surface 12 is provided on the side of the runner body 1. The mounting surface 12 forms an angle α with the inlet of the material channel 11, 0°≤α≤90°. The gate sleeve 2 is arranged on the mounting surface 12, and the feed port of the gate sleeve 2 is connected with the outlet of the material channel 11. The heating coil 3 is wound around the outer wall of the runner body 1.

[0031] In a specific application, one end of the runner body 1 is installed on an injection molding machine, the material channel 11 is connected to the material outlet of the injection molding machine, one end of the sprue sleeve 2 extends into the mold core of the mold, and the material is ejected from the injection molding machine and sequentially passes through the material channel 11, the sprue sleeve 2 and the mold core and is injected into the mold. When the material passes through the material channel 11 and the sprue sleeve 2, the heating coil 3 heats the runner body 1 to keep the material passing through the material channel 11 and the sprue sleeve 2 in a molten state.

[0032] Through the above technical solution, glue can be directly injected from the side. Compared with the method of converting the hot runner to the cold runner, it can not only save materials and reduce the injection molding cost, but also will not produce sprue material. Moreover, the hot melt glue can be directly injected from the side to the product surface without the trouble of flow length ratio. The product molding is easier and the product quality will be improved accordingly. In addition, according to the mold capacity of the injection molding machine, the maximum number of cavities can be opened to improve production efficiency.

[0033] It can be understood that the angle α between the installation surface 12 and the inlet of the material channel 11 means that the angle between the axis of the material channel 11 and the installation surface is α.

[0034] During actual injection molding, the mold core is usually designed to be two opposite pieces, and the two mold cores are relatively moved to close the mold to wrap one end of the sprue bushing 2. However, this method has extremely high requirements for the mold core, otherwise the connection between the mold core and the sprue bushing 2 is prone to glue leakage. In order to avoid this situation, Figure 5 and Figure 6 As shown, in some preferred embodiments, the side gate hot runner further comprises a pressing block 4, which abuts against an action surface 13 on the runner body 1 that is away from the mounting surface 12, and can move along a first direction of the runner body 1. In specific applications, the mold core can be integrally formed, and by applying a force to the pressing block 4 in the first direction, one end of the sprue sleeve 2 can be accurately extended into the mold core under the action of the pressing block 4, so that a complete circumferential surface is formed at the connection between one end of the sprue sleeve 2 and the mold core to avoid glue leakage.

[0035] like Figure 7As shown, in some preferred embodiments, the above-mentioned action surface 13 includes a first surface 131, a second surface 132 and a third surface 133 connected in sequence, the first surface 131 and the third surface 133 are both straight surfaces, and the second surface 132 is an inclined surface, so that a first distance A is formed between the first surface 131 and the third surface 133. In a specific application, when one end of the sprue bushing 2 is inserted into the mold core, the pressing block 4 moves from top to bottom, so that one end of the pressing block 4 passes through the first surface 131, the second surface 132 and the third surface 133 in sequence. When the pressing block 4 passes through the second surface 132, the runner body 1 will move the first distance A toward the mold core under the action of the second surface 132 and the pressing block 4, so that the sprue bushing 2 and the mold core are closely matched, and the glue leakage is further avoided.

[0036] like Figure 7 As shown, in some preferred embodiments, the above-mentioned action surface 13 further includes a fourth surface 134 and a fifth surface 135 connected in sequence, the fourth surface 134 is connected to the third surface 133, and the fourth surface 134 is an inclined surface, so that a second distance B is formed between the third surface 133 and the fifth surface 135. In specific applications, the role of the fourth surface 134 is the same as that of the above-mentioned second surface 132, both of which are to make the gate bushing 2 and the mold core fit tightly to further avoid the situation of glue leakage.

[0037] In some preferred embodiments, the flow channel body 1 is in a long and flat strip shape. By setting the flow channel body 1 in a long and flat strip shape, the volume of the flow channel body 1 can be reduced compared with the traditional circular flow channel body 1, thereby reducing the cost of producing the flow channel body 1.

[0038] In some preferred embodiments, the outer wall of the runner body 1 is provided with a mounting groove 14 that matches the shape of the heating coil 3, and the heating coil 3 is located in the mounting groove 14. In specific applications, by providing the mounting groove 14 on the outer wall of the runner body 1 and arranging the heating coil 3 in the mounting groove 14, not only the volume of the side gate hot runner is reduced, but also the distance between the heating coil 3 and the material channel 11 is reduced, so that the heat generated by the heating coil 3 can be more absorbed by the material in the material channel 11 to reduce heat loss.

[0039] like Figure 4 and Figure 6 As shown, in some preferred embodiments, a temperature sensing line 5 is provided around the outer wall of the flow channel body 1. The temperature sensing line 5 can measure the temperature of the hot nozzle body to ensure that when the material flows into the hot nozzle body, the temperature of the hot nozzle body can keep the material in a molten state.

[0040] like Figure 4 and Figure 6As shown, in some preferred embodiments, the outer wall of the flow channel body 1 is provided with a wire groove 15, and the temperature sensing wire 5 is located in the wire groove 15. In specific applications, by arranging the temperature sensing wire 5 in the wire groove 15, the temperature measurement accuracy is higher than that when the temperature sensing wire 5 protrudes from the outer wall of the flow channel body 1.

[0041] like Figure 4 and Figure 6 As shown, in some preferred embodiments, the runner body 1 is provided with a sealing groove 16, which surrounds the entrance of the material channel 11. In specific applications, a sealing ring is provided in the sealing groove 16, and when the runner body 1 is installed at a predetermined position of the injection molding machine, the sealing ring can seal the gap between the runner body 1 and the injection molding machine to avoid material leakage.

[0042] like Figure 2 and Figure 6 As shown, in some preferred embodiments, the sprue bushing 2 has a plurality of discharge ports 21, and the plurality of discharge ports 21 are evenly arranged. By evenly arranging a plurality of discharge ports 21 on the sprue bushing 2, the material can be evenly injected into the mold core, thereby ensuring the quality of the injection molded product. Specifically, in this embodiment, the number of discharge ports 21 is two, and the two discharge ports 21 are arranged opposite to each other up and down (up and down are arranged in a manner of Figure 6 Directions shown are for reference only).

[0043] To sum up, in one or more embodiments of the utility model, the side gate hot runner of the utility model sets the gate sleeve 2 on the mounting surface 12 at an angle α with the entrance of the material channel 11, so that the side gate hot runner can realize direct side injection. Compared with the method of converting the hot runner to the cold runner, it can not only save materials and reduce the injection molding cost, but also will not produce gate material. At the same time, it will not be troubled by the flow length ratio, so that the product is easy to mold and the quality of the produced products is also improved.

[0044] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A side gate hot runner, characterized in that: The invention comprises a flow channel body (1), a sprue sleeve (2) and a heating coil (3); a material channel (11) is formed in the flow channel body (1); a mounting surface (12) is provided on the side of the flow channel body (1); an angle α is formed between the mounting surface (12) and the inlet of the material channel (11), 0°≤α≤90°; the sprue sleeve (2) is arranged on the mounting surface (12); a material inlet of the sprue sleeve (2) is connected to an outlet of the material channel (11); and the heating coil (3) is wound around the outer wall of the flow channel body (1).

2. The side gate hot runner according to claim 1, characterized in that: It also comprises a pressing block (4), the pressing block (4) being in contact with an action surface (13) on the flow channel body (1) which faces away from the mounting surface (12), and being capable of moving along a first direction of the flow channel body (1).

3. The side gate hot runner according to claim 2, characterized in that: The active surface (13) comprises a first surface (131), a second surface (132) and a third surface (133) connected in sequence, the first surface (131) and the third surface (133) are both straight surfaces, and the second surface (132) is an inclined surface, so that a first distance (A) is formed between the first surface (131) and the third surface (133).

4. The side gate hot runner according to claim 3, characterized in that: The active surface (13) further comprises a fourth surface (134) and a fifth surface (135) connected in sequence, wherein the fourth surface (134) is connected to the third surface (133), and the fourth surface (134) is an inclined surface so as to form a second distance (B) between the third surface (133) and the fifth surface (135).

5. The side gate hot runner according to claim 1, characterized in that: The flow channel body (1) is in the shape of a long flat strip.

6. The side gate hot runner according to claim 1, characterized in that: The outer wall of the flow channel body (1) is provided with a mounting groove (14) matching the shape of the heating coil (3), and the heating coil (3) is located in the mounting groove (14).

7. The side gate hot runner according to claim 1, characterized in that: A temperature sensing wire (5) is wound around the outer wall of the flow channel body (1).

8. The side gate hot runner according to claim 7, characterized in that: A wire groove (15) is provided on the outer side wall of the flow channel body (1), and the temperature sensing wire (5) is located in the wire groove (15).

9. The side gate hot runner according to claim 1, characterized in that: The flow channel body (1) is provided with a sealing groove (16), and the sealing groove (16) surrounds the inlet of the material channel (11).

10. The side gate hot runner according to claim 1, characterized in that: The sprue sleeve (2) has a plurality of discharge ports (21), and the plurality of discharge ports (21) are evenly distributed.

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