Plastic pipe extrusion die
By adding water-cooled structure and limit plate design outside the plastic pipe extrusion mold, the internal stress problem caused by quenching of plastic pipes is solved, production efficiency and mold adaptability are improved, and efficient plastic pipe production is achieved.
Patent Information
- Application Number
- CN202422519300.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-10-17
AI Technical Summary
When making plastic pipe extrusion molds, the high surface temperature of the newly extruded pipes leads to quenching, creating internal stress, affecting quality, and frequent mold replacements lead to a decrease in production rate.
Add a water-cooled structure outside the mold, and through the diverted drainage plate and limiting plate structure, the water-cooled cooling and shaping of plastic pipes can be achieved, and the water-cooling range is conveniently adjusted to adapt to the production of pipes of different diameters, simplifying the mold replacement process.
It effectively reduces the internal stress of plastic pipes, improves production efficiency and flexibility to adapt to pipes with different diameters, and simplifies mold replacement operations.
Smart Images
Figure CN223211888U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of plastic pipe manufacturing, in particular to a plastic pipe extrusion die. Background Art
[0002] Plastic pipe is a common pipe material. It is typically made from polymers such as polyethylene and polypropylene. It boasts a smooth appearance and a variety of colors. It is lightweight, corrosion-resistant, and easy to install. It is widely used in building water supply and drainage, agricultural irrigation, gas transmission, and other fields. The smooth interior of plastic pipe reduces flow resistance, effectively improving fluid transport efficiency. It also exhibits a certain degree of flexibility, adapting to varying terrain. Extrusion dies are commonly used in plastic pipe manufacturing.
[0003] A plastic pipe extrusion die primarily consists of a core, a sleeve, and a manifold. The core, typically cylindrical and located at the center of the mold, determines the inner diameter of the plastic pipe. The sleeve surrounds the core and defines the outer diameter of the pipe. The manifold evenly distributes the molten plastic throughout the mold. The principle is that molten plastic is fed into the die through an extruder. Inside the die, the plastic is pressurized and flows along the annular space between the core and sleeve, gradually forming a plastic pipe of a specific size and shape.
[0004] When an existing plastic pipe extrusion die is used to produce a plastic pipe, the surface temperature of the newly extruded plastic pipe is relatively high. Therefore, if the pipe is taken out directly at this time, the pipe will be directly exposed to the external air, causing the pipe to cool suddenly. As a result, internal stress will appear inside the pipe, which will lead to a decrease in the quality of the pipe. In addition, the existing plastic pipe extrusion die has shortcomings in producing pipes of different lengths. Therefore, when extruding pipes of different calibers, the die needs to be frequently replaced, resulting in a decrease in production rate. Therefore, a plastic pipe extrusion die is proposed to address the above problems. Utility Model Content
[0005] In order to make up for the deficiencies of the prior art and address the problems existing in the existing equipment, the utility model proposes a plastic pipe extrusion die.
[0006] The technical solution adopted by the utility model to solve its technical problems is a plastic pipe extrusion mold, comprising a feed barrel, one side of the feed barrel is welded to a limit plate, the other end of the limit plate is welded to a connecting plate, the interior of the connecting plate is provided with a threaded through-hole; a feed port is provided in the center of the feed barrel, one end of the feed port is connected to the extrusion port, a positioning column is provided inside the extrusion port, one end of the positioning column is welded to one side of the feed barrel; there is a gap between the extrusion port and the limit plate, a No. 1 guide plate is provided inside the gap, and the No. 1 guide plate is provided inside the gap. The top end of the flow plate is welded to two groups of No. 2 limit blocks, and a No. 1 limit block is provided between the No. 2 limit blocks. One end of the No. 1 limit block is welded to the No. 1 guide plate. A water pipe socket is provided in the center of the No. 2 limit block, and the top end of the water pipe socket is connected to the No. 1 drainage pipe inside the No. 1 guide plate. By adding a water cooling structure to the outside of the mold, the structural design can cool the freshly extruded plastic pipe with water and shape it, thereby reducing the problem of increased internal stress in the plastic pipe due to rapid cooling, which affects the quality of the plastic pipe.
[0007] Preferably, a No. 2 drainage plate is provided at the bottom of the feed barrel corresponding to the No. 1 drainage plate, and the bottom of the No. 2 drainage plate is provided with the same structure as the top of the No. 1 drainage plate, but the No. 2 limit block at the bottom of the No. 2 drainage plate does not have a water pipe socket in the center; a No. 2 drainage pipe is provided inside the No. 2 drainage plate, and both ends of the No. 2 drainage pipe can be connected to the No. 1 drainage pipe; five groups of drainage structures are provided between the limit plate and the extrusion port, and the water pipe socket on the top of the drainage structure can be connected to a faucet; by splitting the water cooling structure into individual designs, the water cooling range can be conveniently adjusted to cope with the extrusion operation of plastic water pipes of different calibers, thereby avoiding the problem of complex operation of the original mold when changing the mold.
[0008] Preferably, one end of the connecting plate and the other end are rotatably connected to a cover by a fixing bolt, and threaded holes are opened on both sides of the cover, and the internal diameter of the threaded holes is consistent with that of the connecting plate; a No. 1 limiting ring is provided on the side of the cover close to the feed barrel; a No. 2 limiting ring is provided inside the side of the cover close to the feed barrel, and six groups of springs are welded between the No. 2 limiting ring and the No. 1 limiting ring, and the other end of the spring is welded to the top plate; the top plate is slidably connected to the gap between the limiting plate and the extrusion port; the outer diameter of the top plate is consistent with the outer diameter of the No. 1 guide plate; by adding a limiting plate to the outside of the mold, the guide plate can be easily installed and disassembled, thereby speeding up the mold change rate and improving production efficiency.
[0009] The utility model is beneficial in that:
[0010] The utility model adopts a structural design that adds a water cooling structure to the outside of the mold, so that the plastic pipe just extruded can be cooled and shaped by water, thereby reducing the problem of increased internal stress of the plastic pipe due to rapid cooling, which affects the quality of the plastic pipe; by splitting the water cooling structure into individual designs, the range of water cooling can be easily adjusted to cope with the extrusion operation of plastic water pipes of different diameters, thereby avoiding the problem of complicated operation of the original mold when changing the mold; by adding a limit plate to the outside of the mold, the guide plate can be easily installed and removed, thereby accelerating the mold change rate and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0012] Figure 1 Schematic diagram of the overall structure of the mold;
[0013] Figure 2 Schematic diagram of the mold back structure;
[0014] Figure 3 Schematic diagram of the capping structure;
[0015] Figure 4 Schematic diagram of the mold barrel structure;
[0016] Figure 5 Schematic diagram of the drainage plate structure;
[0017] In the figure: 1. Feed barrel; 2. Water pipe socket; 3. Limit block No. 1; 4. Limit block No. 2; 5. Sealing cover; 6. Fixing bolt; 7. Extrusion port; 8. Connecting plate; 9. Feed port; 10. Limit plate; 11. Limit ring No. 1; 12. Top plate; 13. Limit ring No. 2; 14. Spring; 15. Threaded hole; 16. Positioning column; 17. Drainage plate No. 1; 18. Drainage tube No. 1; 19. Drainage tube No. 2; 20. Drainage plate No. 2. DETAILED DESCRIPTION
[0018] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0019] See also Figure 1-5 As shown, a plastic pipe extrusion die comprises a feed barrel 1, one side of the feed barrel 1 is welded to a limit plate 10, the other end of the limit plate 10 is welded to a connecting plate 8, the interior of the connecting plate 8 is provided with a threaded through hole; a feed port 9 is provided in the center of the feed barrel 1, one end of the feed port 9 is connected to an extrusion port 7, a positioning column 16 is provided inside the extrusion port 7, one end of the positioning column 16 is welded to one side of the feed barrel 1; between the extrusion port 7 and the limit plate 10 There is a gap, and a No. 1 drainage plate 17 is provided inside the gap. The top of the No. 1 drainage plate 17 is welded to two groups of No. 2 limit blocks 4. A No. 1 limit block 3 is provided between the No. 2 limit blocks 4. One end of the No. 1 limit block 3 is welded to the No. 1 drainage plate 17; a water pipe socket 2 is provided in the center of the No. 2 limit block 4, and the top of the water pipe socket 2 is connected to the No. 1 drainage pipe 18 inside the No. 1 drainage plate 17; the No. 1 drainage plate 17 is provided with a No. 2 drainage plate 20 at the bottom corresponding to the feed barrel 1 , the bottom of the No. 2 guide plate 20 is provided with the same structure as the top of the No. 1 guide plate 17, but the No. 2 limit block 4 at the bottom of the No. 2 guide plate 20 does not have a water pipe socket 2 in its center; a No. 2 drainage pipe 19 is opened inside the No. 2 guide plate 20, and the two ends of the No. 2 drainage pipe 19 can be connected to the No. 1 drainage pipe 18; when the plastic pipe is extruded, the operator first removes the cover 5 by rotating the fixing bolt 6, and then adjusts the cooling range by increasing or decreasing the No. 1 guide plate 17 and the No. 2 guide plate 20. Only by inserting the top plate 12 into the gap between the extrusion port 7 and the limit plate 10, and then installing the mold by using the fixing bolt 6 to fix the connecting plate 8 and the cover 5, under the action of the spring 14, the top plate 12 begins to push the No. 1 guide plate 17 and the No. 2 guide plate 20, and fixes the mold in this way. Finally, the water pipe of the faucet is connected to the water pipe socket 2, and the feed port 9 is aligned with the discharge port to perform the extrusion operation.
[0020] There are five groups of drainage structures between the limit plate 10 and the extrusion port 7, and the water pipe socket 2 on the top of the drainage structure can be connected to the faucet; one end of the connecting plate 8 is rotatably connected to the other end with a cover 5 by a fixing bolt 6, and threaded holes 15 are opened on both sides of the cover 5, and the internal diameter of the threaded holes 15 is consistent with that of the connecting plate 8; a No. 1 limit ring 11 is provided on the side of the cover 5 close to the feed barrel 1; a No. 2 limit ring 13 is provided inside the side of the cover 5 close to the feed barrel 1, and six groups of springs 14 are welded between the No. 2 limit ring 13 and the No. 1 limit ring 11, and the other end of the spring 14 is welded to the top plate 12; the top plate 12 is slidably connected to the gap between the limit plate 10 and the extrusion port 7; the outer diameter of the top plate 12 is consistent with that of the feed barrel 1 The outer diameter of the No. 1 guide plate 17 is consistent; when the plastic pipe is cooled, the operator starts the device to start the extrusion operation. At this time, the material flows into the extrusion port 7 along the feed port 9. During this period, the inner diameter of the plastic pipe is fixed by the positioning column 16, and then the outer diameter of the plastic pipe is fixed through the extrusion port 7. Then, the material continues to move forward by extrusion. At this time, the water flows into the No. 1 guide plate 17 along the water pipe socket 2, and then the water is led to the No. 2 drainage pipe 19 through the No. 1 drainage pipe 18. In this way, the material is water-cooled. Finally, the hot water will be discharged from the other port at the top of the No. 1 guide plate 17, thereby maintaining the water temperature stable. Finally, the internal stress of the plastic pipe is reduced in this way, and the plastic pipe is shaped.
[0021] Working principle: when the plastic pipe is extruded, the operator first removes the cover 5 by rotating the fixing bolt 6, and then adjusts the cooling range by increasing or decreasing the No. 1 guide plate 17 and the No. 2 guide plate 20. Only by inserting the top plate 12 into the gap between the extrusion port 7 and the limit plate 10, and then using the fixing bolt 6 to fix the connecting plate 8 and the cover 5 to install the mold, at this time, under the action of the spring 14, the top plate 12 begins to push the No. 1 guide plate 17 and the No. 2 guide plate 20, and fixes the mold in this way. Finally, connect the water pipe of the faucet to the water pipe socket 2, and align the feed port 9 with the discharge port to perform the extrusion operation; when the plastic pipe is extruded, the top plate 12 is inserted into the gap between the extrusion port 7 and the limit plate 10, and then fixes the connecting plate 8 and the cover 5 to fix the mold. When performing the cooling operation, the operator starts the device to start the extrusion operation. At this time, the material flows into the extrusion port 7 along the feed port 9. During this period, the inner diameter of the plastic tube is fixed by the positioning column 16, and then the outer diameter of the plastic tube is fixed by the extrusion port 7. Then, the material continues to move forward by extrusion. At this time, the water flows into the No. 1 drainage plate 17 along the water pipe socket 2, and then the water is led to the No. 2 drainage pipe 19 through the No. 1 drainage pipe 18. In this way, the material is water-cooled. Finally, the hot water will be discharged from the other port at the top of the No. 1 drainage plate 17, thereby maintaining the water temperature stable. Finally, the internal stress of the plastic tube is reduced in this way, and the plastic tube is shaped.
[0022] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
[0023] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.
Claims
1. A plastic pipe extrusion die, characterized by: The invention comprises a feeding barrel (1), one side of the feeding barrel (1) is welded to a limiting plate (10), the other end of the limiting plate (10) is welded to a connecting plate (8), the interior of the connecting plate (8) is provided with a threaded through hole; a feeding port (9) is provided at the center of the feeding barrel (1), one end of the feeding port (9) is connected to an extrusion port (7), a positioning column (16) is provided inside the extrusion port (7), one end of the positioning column (16) is welded to one side of the feeding barrel (1); the extrusion port (7) There is a gap between the limiting plate (10), and a No. 1 drainage plate (17) is provided inside the gap. The top end of the No. 1 drainage plate (17) is welded to two groups of No. 2 limiting blocks (4). A No. 1 limiting block (3) is provided between the No. 2 limiting blocks (4), and one end of the No. 1 limiting block (3) is welded to the No. 1 drainage plate (17); a water pipe socket (2) is provided at the center of the No. 2 limiting block (4), and the top end of the water pipe socket (2) is connected to the No. 1 drainage pipe (18) inside the No. 1 drainage plate (17).
2. A plastic pipe extrusion die according to claim 1, characterized in that: The bottom of the No. 1 guide plate (17) corresponding to the feed barrel (1) is provided with a No. 2 guide plate (20), and the bottom of the No. 2 guide plate (20) is provided with the same structure as the top of the No. 1 guide plate (17), but the No. 2 limit block (4) at the bottom of the No. 2 guide plate (20) does not have a water pipe socket (2) at its center; the interior of the No. 2 guide plate (20) is provided with a No. 2 guide pipe (19), and both ends of the No. 2 guide pipe (19) can be connected to the No. 1 guide pipe (18).
3. The plastic pipe extrusion die according to claim 1, characterized in that: Five groups of drainage structures are provided between the limiting plate (10) and the extrusion port (7), and the water pipe socket (2) at the top of the drainage structure can be connected to a faucet.
4. The plastic pipe extrusion die according to claim 1, characterized in that: One end of the connecting plate (8) and the other end are rotatably connected to a cover (5) by a fixing bolt (6), and threaded holes (15) are provided on both sides of the cover (5), and the internal diameter of the threaded holes (15) is consistent with that of the connecting plate (8); a No. 1 limiting ring (11) is provided on the side of the cover (5) close to the feed barrel (1).
5. A plastic pipe extrusion die according to claim 4, characterized in that: A second limiting ring (13) is provided inside the sealing cover (5) on the side close to the feed barrel (1), and six groups of springs (14) are welded between the second limiting ring (13) and the first limiting ring (11), and the other end of the spring (14) is welded to the top plate (12).
6. A plastic pipe extrusion die according to claim 5, characterized in that: The top plate (12) is slidably connected to the gap between the limiting plate (10) and the extrusion port (7); the outer diameter of the top plate (12) is consistent with the outer diameter of the first guide plate (17).