CN216804259U - Valve needle sleeve of self-positioning hot runner - Google Patents
Valve needle sleeve of self-positioning hot runner Download PDFInfo
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- CN216804259U CN216804259U CN202123289138.2U CN202123289138U CN216804259U CN 216804259 U CN216804259 U CN 216804259U CN 202123289138 U CN202123289138 U CN 202123289138U CN 216804259 U CN216804259 U CN 216804259U
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- valve needle
- valve
- hole
- needle sleeve
- positioning columns
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Abstract
The utility model discloses a valve needle sleeve of a self-positioning hot runner, which relates to the technical field of injection molds and comprises a valve needle sleeve body, wherein the valve needle sleeve body is cylindrical, a through hole is formed in the valve needle sleeve, a valve needle is inserted into the through hole, a flange is arranged at the upper end of the valve needle sleeve, a glue injection nozzle communicated with the through hole is arranged at the lower end of the valve needle sleeve, a plurality of groups of positioning columns are arranged on the side wall of the through hole, the valve needle is abutted to the positioning columns, and a glue running channel for the circulation of glue is formed among the valve needle, the through hole and the positioning columns. According to the utility model, the positioning columns are arranged in the through holes, and the movement tracks of the valve needles are limited by the positioning columns, so that the valve needles and the glue injection nozzles are always in a concentric state, thereby avoiding the damage of the valve needles caused by the impact of the valve needles on the valve needle sleeve due to eccentricity when the valve needles move.
Description
Technical Field
The utility model belongs to the technical field of injection molds, and particularly relates to a valve needle sleeve of a self-positioning hot runner.
Background
The hot runner system is generally applied to an injection mold, and a heating method is used for ensuring that plastic of a runner and a sprue is kept in a molten state, the hot runner system generally comprises a hot nozzle, a splitter plate, a temperature control box, accessories and the like, and the hot nozzle generally comprises two types: the hot nozzle mode directly determines the selection of the hot runner system and the manufacture of a mould, so that the hot runner system is divided into an open hot runner system and a needle valve type hot runner system correspondingly;
the plastic fluid flows in the valve needle sleeve through the glue running channel and then flows out of the valve needle sleeve from the glue injection port.
In order to overcome the defects, the technical personnel in the field actively innovate and study to create a valve needle sleeve of a self-positioning hot runner.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a valve needle sleeve of a self-positioning hot runner, which solves the problem that the existing valve needle is easy to collide with the valve needle sleeve when moving, which is proposed in the background art.
In order to solve the technical problems, the utility model adopts a technical scheme that: the valve needle sleeve comprises a valve needle sleeve body, wherein the valve needle sleeve body is cylindrical, a through hole is formed in the valve needle sleeve, a valve needle is inserted into the through hole, a flange is arranged at the upper end of the valve needle sleeve, the valve needle sleeve and a nozzle head are fixed through the flange, a glue injection nozzle communicated with the through hole is arranged at the lower end of the valve needle sleeve, the opening and closing of the glue injection nozzle are realized through the up-and-down movement of the valve needle, and a plurality of groups of positioning columns are arranged on the side wall of the through hole;
the positioning columns are distributed on the side walls of the through holes in an annular mode, the valve needle is abutted to the positioning columns, and glue passing channels for glue circulation are formed among the valve needle, the through holes and the positioning columns. The fluid flows in the valve needle sleeve through the glue running channel and then flows out of the valve needle sleeve through the glue injection nozzle
The quantity of reference column is 3 groups at least, through the multiple spot location, makes needle and through-hole concentric.
Circular-arc grooves are formed in the side walls of the positioning columns, and each groove is located on the same circumference.
The radius of recess equals the radius of needle guarantees that the needle can laminate with the recess completely.
The positioning column extends from one end of the through hole to the other end of the through hole, and the positioning column is set to be as long as the through hole, so that the positioning column has better guidance.
The valve needle sleeve is made of copper, and compared with other materials, the valve needle sleeve made of copper has good heat conductivity and heat storage performance, so that the temperature of fluid in the valve needle sleeve can be ensured, and the fluid can normally flow.
The utility model has the beneficial effects that:
1. according to the valve needle sleeve, the positioning columns are arranged in the through holes, the moving tracks of the valve needles are limited through the positioning columns, and the valve needles and the glue injection nozzles are always in a concentric state, so that the valve needles are prevented from being damaged due to the fact that the valve needles impact the valve needle sleeve due to eccentricity when moving, meanwhile, glue running channels are formed among the valve needles, the positioning columns and the through holes, molten plastics pass through the glue running channels and enter the glue injection ports, and normal use of the whole mechanism is guaranteed;
2. according to the valve needle sleeve, the positioning column extends from one end of the through hole to the other end of the through hole, the length of the positioning column is the same as that of the through hole, and the valve needle is surrounded by the positioning column, so that the positioning column has a good limiting effect;
3. through set up the recess the same with the needle radius on the reference column, guarantee in the removal of needle, needle and reference column laminating guarantee that the needle can normally open and close the injecting glue mouth when removing.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic structural view of the present invention;
figure 2 is a cross-sectional view of the valve needle of the present invention in a closed position;
figure 3 is a cross-sectional view of the open condition of the valve needle of the present invention;
FIG. 4 is a cross-sectional view in horizontal section of the present invention;
FIG. 5 is a view of the valve pin sleeve installation of the present invention
The parts in the drawings are marked as follows:
1, a valve needle sleeve body; 2, through holes; 3, a valve needle; 4, a flange; 5, injecting a glue nozzle; 6, positioning columns; 7, a glue channel is arranged; 8, grooves; 9 a splitter plate; 91 flow passage.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and the present invention will be described in detail with reference to the accompanying drawings. The utility model may be embodied in other different forms, i.e. it is capable of various modifications and changes without departing from the scope of the utility model as disclosed.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b): a valve needle sleeve for self-positioning a hot runner, which is shown in the utility model 5: the valve needle sleeve is arranged on the flow distribution plate 9, the flow distribution plate is provided with a flow passage 91, the flow passage is communicated with the through hole of the valve needle sleeve, the plastic fluid flows in the glue flowing passage, and the flow direction of the plastic fluid is shown in the figure;
as shown in fig. 1 and 4, a valve needle sleeve 1 of a self-positioning hot runner is provided, which includes a valve needle sleeve body, the valve needle sleeve body is cylindrical, a through hole 2 is formed in the valve needle sleeve, a valve needle 3 is inserted into the through hole, a flange 4 is arranged at the upper end of the valve needle sleeve, the valve needle sleeve and a nozzle head are fixed through the flange, a glue injection nozzle 5 communicated with the through hole is arranged at the lower end of the valve needle sleeve, and the opening and closing of the glue injection nozzle are realized through the up-and-down movement of the valve needle, as shown in fig. 2, when the valve needle moves to the lower end of the valve needle sleeve, the valve needle closes the glue injection nozzle, as shown in fig. 3, when the valve needle moves to the upper end of the valve needle sleeve, the glue injection nozzle is opened, molten plastic can flow out through the glue injection nozzle, and a plurality of positioning columns 6 are arranged on the side wall of the through hole; a glue running channel 7 for the circulation of glue is formed among the valve needle, the through hole and the positioning column. The fluid flows in the valve needle sleeve through the glue running channel and then flows out of the valve needle sleeve through the glue injection nozzle.
The positioning column extends from one end of the through hole to the other end of the through hole, and the positioning column is set to be as long as the through hole, so that the positioning column has better guidance. Compared with the conventional structure, as fluid can flow in the cavity between the positioning columns, the length of the positioning columns cannot influence the practical use of the valve needle sleeve, and the length of the positioning columns can be designed as required.
The quantity of reference column is 3 groups at least, the reference column is the annular distribution and is in the lateral wall of through-hole, through the multiple spot location, carries out accurate location to the needle. Circular-arc grooves 8 are formed in the side walls of the positioning columns, and each groove is located on the same circumference. The radius of recess equals the radius of needle guarantees that the needle can laminate with the recess completely.
The valve needle sleeve is made of copper, and compared with other materials, the valve needle sleeve made of copper has good heat conductivity and heat storage performance, so that the temperature of fluid in the valve needle sleeve can be ensured, and the fluid can normally flow.
The working process and working principle of the utility model are as follows:
when the plastic injection mold is used, after molten plastic liquid enters the through hole, the molten plastic liquid flows in the glue walking channel formed between the valve needle and the positioning column, when glue is required to be injected, the valve needle moves upwards, the glue injection port is opened, the molten plastic liquid flows into the mold, after the glue injection is finished, the valve needle moves downwards, the glue injection port is sealed by the valve needle, the molten plastic liquid is blocked in the flow channel, due to the existence of the positioning column, the valve needle always keeps a concentric state with the glue injection port when moving, and therefore the valve needle can be effectively prevented from colliding with the valve needle sleeve when being inserted into the glue injection port, and the service life of the valve needle is prolonged.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures made by using the contents of the specification and the drawings, or other related technical fields, are encompassed by the present invention.
Claims (6)
1. The utility model provides a from valve needle cover of location hot runner which characterized in that: the needle sleeve comprises a valve needle sleeve body, wherein the valve needle sleeve body is cylindrical, a through hole is formed in the valve needle sleeve, a valve needle is inserted into the through hole, a flange is arranged at the upper end of the valve needle sleeve, a glue injection nozzle communicated with the through hole is arranged at the lower end of the valve needle sleeve, and a plurality of groups of positioning columns are arranged on the side wall of the through hole;
the positioning columns are distributed on the side walls of the through holes in an annular mode, the valve needle is abutted to the positioning columns, and glue passing channels for glue circulation are formed among the valve needle, the through holes and the positioning columns.
2. The valve pin sleeve of a self-locating hot runner of claim 1, wherein: the quantity of reference column is 3 at least groups.
3. The valve pin sleeve of a self-locating hot runner of claim 1, wherein: circular-arc grooves are formed in the side walls of the positioning columns, and each groove is located on the same circumference.
4. The valve pin sleeve of a self-locating hot runner of claim 3, wherein: the radius of the groove is equal to the radius of the valve needle.
5. The valve pin sleeve of a self-locating hot runner of claim 1, wherein: the positioning column extends from one end of the through hole to the other end of the through hole.
6. The valve pin sleeve of a self-locating hot runner of claim 1, wherein: the valve needle cover is made of copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123289138.2U CN216804259U (en) | 2021-12-24 | 2021-12-24 | Valve needle sleeve of self-positioning hot runner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123289138.2U CN216804259U (en) | 2021-12-24 | 2021-12-24 | Valve needle sleeve of self-positioning hot runner |
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| Publication Number | Publication Date |
|---|---|
| CN216804259U true CN216804259U (en) | 2022-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123289138.2U Active CN216804259U (en) | 2021-12-24 | 2021-12-24 | Valve needle sleeve of self-positioning hot runner |
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| CN (1) | CN216804259U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114889061A (en) * | 2022-06-29 | 2022-08-12 | 成都泽雅科技发展有限公司 | Injection mold |
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2021
- 2021-12-24 CN CN202123289138.2U patent/CN216804259U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114889061A (en) * | 2022-06-29 | 2022-08-12 | 成都泽雅科技发展有限公司 | Injection mold |
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