Multi-stage cone sizing sleeve for forming plastic netting tube
Patent Information
- Application Number
- CN202521914141.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-05
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-09-05
AI Technical Summary
[0003]然而，随着塑料网管的持续生产，成型过程中的塑料网管会将热量逐渐传导至定径套上，使得定径套的温度逐渐升高，而由于定径套的外层持续受到冷却水的降温处理，内层并不能得到有效的降温处理，如此一来，定径套的内外温差就会逐渐增大，使得塑料网管在单级锥形定径套上的冷却成型速率变慢，同时还会产生网孔大小不均匀、产品整体幅宽尺寸波动较大等缺陷
[0010] Beneficial effects: Compared with the prior art, the multi-stage conical sizing sleeve for molding plastic mesh tubes provided in this application continuously cools the outer layer of the sizing sleeve through cooling water in an external cold water tank, and continuously cools the inner layer of the sizing sleeve through cooling water introduced into the cavity of the hollow lifting rod. This ensures that the temperature of the sizing sleeve does not gradually increase during the continuous molding of the plastic mesh tube, or in other words, it can greatly limit the temperature increase of the plastic mesh tube, thereby continuously ensuring the cooling and molding rate of the plastic mesh tube. At the same time, the cooperation of the first-stage conical part and the second-stage conical part can progressively cool and shape the plastic mesh tube, resulting in better uniformity of mesh size and reducing the overall width dimensional fluctuation of the product.
Smart Images
Figure CN224644092U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of plastic mesh tube processing equipment, and in particular to a multi-stage conical sizing sleeve for forming plastic mesh tubes, which is suspended in a cold water tank containing cooling water. Background Technology
[0002] In the prior art, during the molding of plastic mesh tubes, a single-stage conical sizing sleeve is generally used to cool and shape the plastic mesh tubes. The sizing sleeve is located inside a cold water tank, and cooling water is continuously injected into the cold water tank to cool the surface of the sizing sleeve. The cooling water flows out automatically from the overflow port of the cold water tank.
[0003] However, as the plastic mesh tube continues to be produced, the plastic mesh tube will gradually transfer heat to the sizing sleeve during the molding process, causing the temperature of the sizing sleeve to gradually rise. Since the outer layer of the sizing sleeve is continuously cooled by cooling water, the inner layer cannot be effectively cooled. As a result, the temperature difference between the inside and outside of the sizing sleeve will gradually increase, which will slow down the cooling and molding rate of the plastic mesh tube on the single-stage conical sizing sleeve. At the same time, it will also produce defects such as uneven mesh size and large fluctuations in the overall width of the product. Utility Model Content
[0004] This application provides a multi-stage conical sizing sleeve for molding plastic mesh tubes, which can continuously ensure the cooling and molding rate of the plastic mesh tubes, and make the mesh size uniformity better, reducing the overall width and dimension fluctuation of the product.
[0005] This application provides a multi-stage conical sizing sleeve for molding plastic mesh tubes, which is suspended in a cold water tank containing cooling water. The sizing sleeve includes a first-stage conical part, a second-stage conical part, and a cylindrical body connected coaxially in sequence. The outer diameter of the bottom of the second-stage conical part is the same as the outer diameter of the cylindrical body. The sizing sleeve is a bottom-opening conical sleeve with an inner cavity. A partition is provided in a sealed manner at the connection position between the second-stage conical part and the cylindrical body inside the sizing sleeve. An overflow pipe is provided on the partition, which extends vertically towards the first-stage conical part. An exhaust hole communicating with the inner cavity is provided on the cylindrical body. A hollow lifting rod is connected to the top of the first-stage conical part at its center position. The other end of the hollow lifting rod is used to connect to the molding mold. A cold water pipe communicating with the rod cavity is provided on the hollow lifting rod for connecting to a cold water source. The rod cavity communicates with the inner cavity.
[0006] In one possible implementation, the top opening of the overflow pipe is located near the middle of the first-stage cone and is above the water level of the cooling water in the cold water tank.
[0007] In one possible implementation, the vent is a strip-shaped vent that extends vertically.
[0008] In one possible implementation, the top opening of the vent is located near the partition.
[0009] In one possible implementation, there are multiple overflow pipes, and the multiple overflow pipes are evenly distributed on the partition.
[0010] Beneficial effects: Compared with the prior art, the multi-stage conical sizing sleeve for molding plastic mesh tubes provided in this application continuously cools the outer layer of the sizing sleeve through cooling water in an external cold water tank, and continuously cools the inner layer of the sizing sleeve through cooling water introduced into the cavity of the hollow lifting rod. This ensures that the temperature of the sizing sleeve does not gradually increase during the continuous molding of the plastic mesh tube, or in other words, it can greatly limit the temperature increase of the plastic mesh tube, thereby continuously ensuring the cooling and molding rate of the plastic mesh tube. At the same time, the cooperation of the first-stage conical part and the second-stage conical part can progressively cool and shape the plastic mesh tube, resulting in better uniformity of mesh size and reducing the overall width dimensional fluctuation of the product.
[0011] These and other objects, features and advantages of this utility model will be fully realized through the following detailed description. Attached Figure Description
[0012] Figure 1 A schematic diagram of the structure of the multi-stage conical sizing sleeve used in this application for molding plastic mesh tubes is shown. Detailed Implementation
[0013] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.
[0014] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, the above terms should not be construed as limitations on this utility model.
[0015] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.
[0016] refer to Figure 1 This application provides a multi-stage conical sizing sleeve for molding plastic mesh tubes, which is suspended in a cold water tank 10 containing cooling water. The sizing sleeve 20 includes a primary conical section 21, a secondary conical section 22, and a cylindrical body 23 connected coaxially in sequence. The outer diameter of the bottom of the secondary conical section 22 is the same as the outer diameter of the cylindrical body 23. The outer diameter of the bottom of the primary conical section 21 is the same as the outer diameter of the top of the secondary conical section 22. At the same time, the outer diameter of the top of the primary conical section 21 is smaller than the outer diameter of the bottom of the primary conical section 21.
[0017] The sizing sleeve 20 is a bottom-opening conical sleeve with an inner cavity 201. A partition 24 is provided inside the sizing sleeve 20 at the connection point between the secondary conical section 22 and the cylindrical body 23 in a sealed manner. An overflow pipe 25 is provided on the partition 24, extending vertically towards the primary conical section 21. An exhaust port 202 communicating with the inner cavity 201 is provided on the cylindrical body 23. A hollow lifting rod 30 is connected to the top of the primary conical section 21 at its center. The other end of the hollow lifting rod 30 is used to connect to the forming mold. A cold water pipe (not shown in the figure) communicating with the rod cavity 301 is provided on the hollow lifting rod 30 for connecting to a cold water source. The rod cavity 301 is also connected to the inner cavity 201.
[0018] During the molding process of the plastic mesh tube, cooling water is continuously injected into the cold water tank 10, while cooling water flowing from the cold water pipe is continuously introduced through the rod cavity 301 and flows into the inner cavity 201 of the sizing sleeve 20. The water flows into the cold water tank 10 through the bottom opening of the sizing sleeve 20. During this period, the air in the inner cavity 201 is discharged through the vent 202. When the cooling water in the cold water tank 10 reaches the overflow port of the tank, it automatically flows out. This allows for continuous cooling of both the outer and inner layers of the sizing sleeve 20, thereby ensuring the cooling molding rate of the plastic mesh tube.
[0019] After the molten wire mesh blank flows out of the forming mold, it is first initially cooled on the first-stage cone section 21, gradually hardening and initially determining the width of the wire mesh (slightly smaller than the final width). Then the blank passes through the second-stage cone section 22 for further cooling. During this process, the product mesh is finally shaped and undergoes a certain stretching to improve its strength and determine the width of the product. Since the temperature difference between the inside and outside of the sizing sleeve 20 is small, and the pressure difference between the inside and outside is balanced under the action of the water inlet and vent 202 of the sizing sleeve 20, the fluctuation of the sizing sleeve 20 caused by cooling water disturbance and mechanical vibration can be reduced on the basis of the progressive cooling of the first-stage cone section 21 and the second-stage cone section 22, thereby enhancing the consistency of the product mesh and reducing the variation of the product width.
[0020] In one embodiment, the top opening of the overflow pipe 25 is located near the middle of the first-stage cone portion 21 and above the water level α of the cooling water in the cold water tank 10. This allows the cooling water in the inner cavity 201 to be maintained near the middle of the first-stage cone portion 21, pre-cooling the inner layer of the first-stage cone portion 21. When the cooling water above the partition 24 in the inner cavity 201 reaches the top opening of the overflow pipe 25, the cooling water above the partition 24 will flow through the overflow pipe 25 to below the partition 24, and then flow into the cold water tank 10 through the bottom opening of the sizing sleeve 20.
[0021] In one embodiment, the exhaust port 202 is a strip-shaped hole, and the exhaust port 202 extends vertically. This allows the air to escape through a path with minimal resistance by utilizing the physical property that air has a low density and will naturally float upwards. This achieves a highly efficient, visible, and self-driven exhaust process with better exhaust effect.
[0022] More preferably, the top opening of the vent 202 is close to the partition 24, so that the air at the highest point of the inner cavity 201 can be completely discharged to avoid the formation of air cavitation. If there are large air bubbles in the inner cavity 201, the sizing sleeve 20 will easily shake, affecting the molding effect of the plastic mesh tube.
[0023] In one embodiment, there are multiple overflow pipes 25, and the multiple overflow pipes 25 are evenly distributed on the baffle 24. This ensures that the liquid above the baffle 24 can be discharged evenly and synchronously from the entire planar area of the baffle 24 to the bottom of the baffle 24, and can reduce the risk of eddy currents and maintain the overall stability of the cooling water surface above the baffle 24. In addition, the overflow load can be shared by multiple distributed overflow pipes 25, and the diameter of each overflow pipe 25 can be made smaller.
[0024] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from the stated principles.
Claims
1. A multi-stage conical sizing sleeve for molding plastic mesh pipes, suspended in a cooling water tank, characterized in that, The sizing sleeve includes a primary conical section, a secondary conical section, and a cylindrical body connected coaxially in sequence. The outer diameter of the bottom of the secondary conical section is the same as the outer diameter of the cylindrical body. The sizing sleeve is a bottom-opening conical sleeve with an inner cavity. A partition is provided in a sealed manner at the connection position between the secondary conical section and the cylindrical body inside the sizing sleeve. An overflow pipe is provided on the partition and extends vertically towards the primary conical section. An exhaust hole communicating with the inner cavity is provided on the cylindrical body. A hollow lifting rod is connected to the top of the primary conical section at the center position. The other end of the hollow lifting rod is used to connect to the forming mold. A cold water pipe communicating with the rod cavity is provided on the hollow lifting rod for connecting to a cold water source. The rod cavity is connected to the inner cavity.
2. The multi-stage conical sizing sleeve for forming plastic mesh tubes as described in claim 1, characterized in that, The top opening of the overflow pipe is located near the middle of the first-stage cone and is higher than the water level of the cooling water in the cold water tank.
3. The multi-stage conical sizing sleeve for forming plastic mesh tubes as described in claim 1, characterized in that, The exhaust port is a strip-shaped hole that extends vertically.
4. The multi-stage conical sizing sleeve for forming plastic mesh tubes as described in claim 3, characterized in that, The top opening of the vent is located near the partition.
5. The multi-stage conical sizing sleeve for forming plastic mesh tubes as described in claim 1, characterized in that, The overflow pipes are multiple, and the multiple overflow pipes are evenly distributed on the partition.