Valve needle guide positioning structure

Abstract

The utility model provides a valve needle guide positioning structure relates to needle valve hot runner technical field, including valve needle guide ring, the middle part of valve needle guide ring is equipped with the guide round hole that passes up and down, the inner surface of guide round hole has the valve needle body that passes up and down and slides in the axial direction and inserts, the outer ring both sides of valve needle guide ring are equipped with the double waist type hole that passes up and down. The utility model discloses the guide round hole of valve needle guide ring middle part provides the accurate passage of axial sliding for valve needle body, and the mouth core top end is opposite with valve needle guide ring bottom end, further forms two -way location to the movement track of valve needle body, when valve needle body assembly does not need blindly alignment, can directly wear into along with guide round hole and accurate butt -joint mouth core, effectively avoided the problem that valve needle body and nozzle body, mouth core and so on part collision damage because of inaccurate positioning, prolongs the service life of hot runner and mould relevant parts, reduces the assembly difficulty, improves the assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of needle valve hot runner technology, and in particular to a valve needle guiding and positioning structure. Background Technology

[0002] The valve needle guide and positioning structure is a key component used in needle valve hot runner systems. It is mainly used to precisely guide and position the movement trajectory of the valve needle, ensuring that the valve needle can accurately align with the gate during the opening and closing process, thus guaranteeing the stability of the injection molding process and product quality. In the application of needle valve hot runner systems, the guidance and positioning of the valve needle is particularly critical. Reliable guidance and positioning can not only effectively improve the appearance quality of the product and avoid injection defects caused by valve needle misalignment, but also play a key role in the service life of the mold and hot runner, reducing wear between components and lowering the failure rate.

[0003] The existing technology has the following shortcomings: The existing valve needle guiding and positioning structure lacks precise positioning design, which can easily lead to misalignment during valve needle assembly, causing the valve needle to collide and be damaged with hot runners, molds, and other related parts. At the same time, the existing device does not reasonably distinguish the diameter of the guide hole and the glue passage hole and optimize the structure, which can easily lead to the valve needle being mistakenly inserted into the glue passage hole, causing the valve needle to lose its guiding function, thereby affecting injection molding accuracy and product quality, increasing the risk of production failure and maintenance costs. Utility Model Content

[0004] This utility model proposes a valve needle guiding and positioning structure, which can effectively avoid the problem of damage to hot runner and mold parts caused by misalignment and inaccurate positioning during valve needle assembly. At the same time, it prevents the valve needle from losing its guiding function when inserted into the glue hole due to misoperation, ensuring guiding and positioning accuracy, improving product quality and the service life of mold and hot runner, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a valve needle guiding and positioning structure, including a valve needle guiding ring, wherein a guide circular hole is provided in the middle of the valve needle guiding ring, and a valve needle body is slidably inserted into the inner surface of the guide circular hole along the axial direction. Double waist-shaped holes are provided on the left and right sides of the outer ring of the valve needle guiding ring, and the diameter of the guide circular hole is larger than the diameter of the double waist-shaped hole.

[0006] Preferably, a nozzle body is fixedly mounted on the outer side of the valve needle guide ring.

[0007] Preferably, a copper sleeve heater is provided circumferentially on the outer wall of the nozzle body.

[0008] Preferably, a nozzle core is provided at the inner bottom end of the nozzle body, the top end face of the nozzle core is opposite to the bottom end face of the valve needle guide ring, and the bottom end of the valve needle body can be inserted into the inner side of the nozzle core axially.

[0009] Preferably, a flange is inserted into the inner side of the bottom end of the nozzle body, the flange is sleeved on the outer side of the nozzle core, and the nozzle core passes through the inner side of the flange to the bottom of the flange.

[0010] Preferably, a heat-insulating cap is fitted on the outer side of the bottom end of the nozzle.

[0011] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows: 1. In this utility model, through the mutual cooperation of the valve needle guide ring, the guide hole and the valve needle body, the valve needle guide ring is fixed in the nozzle body. The guide hole in the middle provides a precise channel for the valve needle body to slide axially. The top of the nozzle core is opposite to the bottom of the valve needle guide ring, which further forms a bidirectional limit on the movement trajectory of the valve needle body. When assembling the valve needle body, there is no need to blindly align it. It can be directly inserted along the guide hole and accurately connected to the nozzle core. This effectively avoids the problem of collision damage between the valve needle body and the nozzle body, nozzle core and other parts due to inaccurate positioning, extends the service life of the hot runner and related mold parts, and at the same time reduces the assembly difficulty and improves the assembly efficiency.

[0012] 2. In this utility model, by using the difference in diameter between the guide round hole and the double-waisted hole on the valve needle guide ring, and the positioning of the double-waisted hole for glue passage, the diameter of the guide round hole is larger than that of the double-waisted hole, and the double-waisted hole is only used for melt flow. The two are clearly distinguished in terms of function and size. Operators can intuitively identify the assembly channel of the valve needle body through the diameter, which can completely prevent the operation error of accidentally inserting the valve needle body into the double-waisted hole, ensuring that the valve needle body always slides along the guide round hole, avoiding loss of guiding function, thereby ensuring the accuracy of the valve needle body in controlling the opening and closing of the gate, reducing injection defects, improving the appearance quality and dimensional accuracy of the product, and reducing production downtime and maintenance costs caused by misoperation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the unfolded structure of the valve needle guide and positioning structure of this utility model; Figure 2 This is a cross-sectional schematic diagram of the valve needle guide and positioning structure of this utility model; Figure 3 This is a front structural diagram of the valve needle guide ring of this utility model; Figure 4 This is a schematic diagram of the back structure of the valve needle guide ring of this utility model.

[0014] Legend: 1. Valve needle guide ring; 11. Guide hole; 12. Double waist-shaped hole; 2. Valve needle body; 3. Nozzle body; 4. Copper sleeve heater; 5. Nozzle core; 6. Flange; 7. Heat insulation cap. Detailed Implementation

[0015] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0017] Example 1: As Figure 1 , Figure 3 and Figure 4 As shown, this utility model provides a technical solution: including a valve needle guide ring 1, a guide circular hole 11 that runs vertically through the middle of the valve needle guide ring 1, a valve needle body 2 that runs vertically through the inner surface of the guide circular hole 11 that slides axially along the inner surface of the guide circular hole 11, and double waist-shaped holes 12 that run vertically through the left and right sides of the outer ring of the valve needle guide ring 1, the diameter of the guide circular hole 11 being larger than the diameter of the double waist-shaped hole 12. The effect achieved by the entire embodiment 1 is as follows: the guide hole 11 of the valve needle guide ring 1 provides a dedicated axial sliding channel for the valve needle body 2. At the same time, by utilizing the difference in diameter between the guide hole 11 and the double waist-shaped hole 12, the valve needle body 2 is structurally prevented from being mistakenly inserted into the double waist-shaped hole 12, ensuring that the valve needle body 2 always moves along a precise trajectory. The double waist-shaped hole 12 can also normally realize the function of melt flow, laying a precise guiding foundation for subsequent assembly with other components and overall operation of the equipment.

[0018] Example 2: Figure 2 As shown, this utility model provides a technical solution: a nozzle body 3 is fixedly installed on the outer side of the valve needle guide ring 1, a copper sleeve heater 4 is sleeved on the outer side wall of the nozzle body 3 along the circumferential direction, a nozzle core 5 is provided at the bottom inner side of the nozzle body 3, the top end face of the nozzle core 5 is opposite to the bottom end face of the valve needle guide ring 1, the bottom end of the valve needle body 2 can be inserted into the inner side of the nozzle core 5 along the axial direction, a flange 6 is inserted into the inner side of the bottom end of the nozzle body 3, the flange 6 is sleeved on the outer side of the nozzle core 5, the nozzle core 5 penetrates the inner side of the flange 6 to the bottom of the flange 6, and a heat insulation cap 7 is sleeved on the outer side of the bottom end of the nozzle core 5. The overall effect of embodiment 2 is as follows: the valve needle guide ring 1 is fixed inside the nozzle body 3, so that the guide hole 11 is precisely aligned with the nozzle core 5, further limiting the movement trajectory of the valve needle body 2; the copper sleeve heater 4 can heat and keep the molten adhesive inside the nozzle body 3, preventing the molten adhesive from solidifying and affecting the flow; the flange 6 realizes the stable connection between the nozzle body 3 and the external structure; the heat insulation cap 7 can block the heat transmitted by the nozzle core 5, preventing the external components from being damaged due to high temperature; and the components work together to achieve the integrity of the equipment structure and the stability of its function.

[0019] The working principle of the entire equipment is as follows: During equipment assembly, the valve needle guide ring 1 is first fixedly installed inside the nozzle body 3, ensuring that the bottom end face of the valve needle guide ring 1 is aligned with the top end face of the nozzle core 5 inside the nozzle body 3. Then, the valve needle body 2 is axially inserted through the guide hole 11 in the middle of the valve needle guide ring 1, so that the bottom end of the valve needle body 2 extends to the inside of the nozzle core 5. Subsequently, the flange 6 is inserted from the bottom inside of the nozzle body 3 and sleeved on the outside of the nozzle core 5. Finally, a heat insulation cap 7 is sleeved on the bottom outside of the nozzle core 5, and a copper sleeve heater 4 is sleeved on the outer wall of the nozzle body 3. When the equipment is running, the copper sleeve heater 4 is energized and heats the inside of the nozzle body 3, causing the internal components to melt. The adhesive remains in a flowing state, and the molten adhesive can flow through the double-waisted hole 12 on the outer ring of the valve needle guide ring 1 into the nozzle body 3. When it is necessary to control the opening and closing of the gate, the valve needle body 2 slides axially along the guide hole 11, and its bottom end moves synchronously inside the nozzle core 5 to realize the opening or closing of the gate. During this process, the guide hole 11 always provides precise guidance for the valve needle body 2 to avoid the valve needle body 2 from deviating. Because the diameter of the double-waisted hole 12 is smaller than that of the guide hole 11, the valve needle body 2 will not be mis-inserted. The flange 6 ensures the stable connection between the nozzle body 3 and the external structure, and the heat insulation cap 7 blocks heat transfer to ensure the continuous and stable operation of all components of the equipment.

[0020] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A valve needle guiding and positioning structure, characterized in that: The device includes a valve needle guide ring (1), in which a guide hole (11) is provided in the middle and extends vertically. A valve needle body (2) is slidably inserted into the inner surface of the guide hole (11) along the axial direction. Double waist-shaped holes (12) are provided on both the left and right sides of the outer ring of the valve needle guide ring (1). The diameter of the guide hole (11) is larger than the diameter of the double waist-shaped hole (12).

2. The valve needle guiding and positioning structure according to claim 1, characterized in that: The nozzle body (3) is fixedly installed on the outside of the valve needle guide ring (1).

3. The valve needle guiding and positioning structure according to claim 2, characterized in that: The outer wall of the nozzle body (3) is fitted with a copper sleeve heater (4) along the circumferential direction.

4. The valve needle guiding and positioning structure according to claim 2, characterized in that: The nozzle body (3) has a nozzle core (5) at its inner bottom end. The top end face of the nozzle core (5) is opposite to the bottom end face of the valve needle guide ring (1). The bottom end of the valve needle body (2) can be inserted into the inner side of the nozzle core (5) along the axial direction.

5. The valve needle guiding and positioning structure according to claim 4, characterized in that: A flange (6) is inserted into the inner side of the bottom end of the nozzle body (3). The flange (6) is sleeved on the outer side of the nozzle core (5). The nozzle core (5) passes through the inner side of the flange (6) to the bottom of the flange (6).

6. The valve needle guiding and positioning structure according to claim 4, characterized in that: A heat insulation cap (7) is fitted on the outer side of the bottom end of the nozzle core (5).

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