An extruder head

Abstract

This utility model relates to the technical field of sealing strip production equipment, and discloses an extruder head, including a main body with at least one flow channel for conveying raw materials running through it. The main body is covered by an upper cover plate and a lower cover plate. A third and second liquid storage chamber are interconnected between the main body and the upper cover plate, and a fourth and first liquid storage chamber are isolated between the main body and the lower cover plate. A second liquid guide hole connecting the third and fourth liquid storage chambers is provided inside the main body, and a first liquid guide hole connecting the first and second liquid storage chambers is also provided inside the main body. A second hole and a first hole are provided on the lower cover plate. Water can circulate between the water source and the main body, thereby controlling the temperature of the main body and consequently the temperature of the raw materials entering the mold. This ensures that the raw materials are kept at an optimal temperature when entering the mold, thus preventing defects in the finished sealing strip due to temperature issues and guaranteeing the quality of the finished sealing strip.

Description

Technical Field

[0001] This utility model relates to the technical field of sealing strip production equipment, and in particular to an extruder head. Background Technology

[0002] Automotive sealing strips are typically formed by extruding several different types and grades of rubber raw materials into a single mold. The mold has multiple feed ports, each connecting to the output pipes of multiple extruders. Each extruder supplies one type of raw material, which flows into the mold through the feed ports, where it is then extruded and shaped into a sealing strip.

[0003] In actual production, to facilitate the docking of multiple extruders and dies, a die head is usually installed between the extruder's output pipe and the die. The die head has multiple independent flow channels. The feed port of each flow channel is connected to the output pipe of the corresponding extruder, and the discharge port is connected to the corresponding feed port on the die. This allows the raw materials output from multiple extruders to be concentrated and converged at the die head, and then conveyed to the various feed ports of the die, achieving synchronous co-extrusion of multiple raw materials.

[0004] In the production of composite rubber sealing strips, the optimal molding temperature of the raw material within the mold is 80℃. However, when the raw material is extruded from the extruder, its temperature typically exceeds 80℃, sometimes even reaching over 100℃. This causes the temperature of the raw material entering the mold to far exceed the optimal molding temperature range. High temperatures result in the rubber raw material remaining in a highly plastic state after forming the sealing strip through the mold. Upon exposure to cold air, uneven shrinkage occurs, easily leading to defects such as cracks, bubbles, tears, and dimensional deviations, severely impacting the product's pass rate and molding quality. Utility Model Content

[0005] The purpose of this invention is to provide an extruder head for controlling the temperature of the raw material fed into the mold, so that the raw material is formed at the optimal temperature, thereby ensuring product quality and product qualification rate.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An extruder head includes a main body with at least one flow channel for conveying raw materials. The main body is covered by an upper cover plate and a lower cover plate. A third and a second liquid storage chamber are interconnected between the main body and the upper cover plate. A fourth and a first liquid storage chamber are isolated from each other between the main body and the lower cover plate. A second liquid guide hole connecting the third and fourth liquid storage chambers is provided within the main body. A first liquid guide hole connecting the first and second liquid storage chambers is also provided within the main body. A second hole and a first hole are provided on the lower cover plate, with the first hole communicating with the first liquid storage chamber and the second hole communicating with the fourth liquid storage chamber.

[0008] Furthermore, the flow channel includes four first flow channels, the main body includes a front, a rear and four other sides, the discharge ports of the four first flow channels are all located at the front of the main body and are evenly distributed along the circumference, and the inlets of the four first flow channels are respectively located on the other four sides excluding the rear and front of the main body.

[0009] Furthermore, the centerlines of the four first flow channels are all set in the horizontal direction, and the four first flow channels are set in three layers in the vertical direction: upper, middle and lower. Two of the first flow channels are located in the middle layer, and the other two are located in the upper and lower layers, respectively.

[0010] Furthermore, the flow channel includes a first flow channel, the inlet of the first flow channel is provided with a first feed connector, the first feed connector includes a connecting pipe with one end connected to the inlet of the first flow channel and a sleeve sleeved outside the connecting pipe, the sleeve is connected to the connecting pipe, a liquid storage chamber is provided between the sleeve and the connecting pipe, and a fourth hole and a third hole are provided on the sleeve wall, both of which are in communication with the liquid storage chamber.

[0011] Furthermore, an annular groove is provided on the outer wall of the middle part of the connecting pipe, and the two ends of the annular groove are a first flange and a second flange, respectively. The second flange is close to the first flow channel, and the two ends of the sleeve are respectively sealed to the first flange and the second flange.

[0012] Furthermore, a sealing ring is provided on the side of the second flange near the first flow channel. The sealing ring is sleeved on the outside of the connecting pipe. O-rings are clamped between the sealing ring and the sleeve, and between the second flange and the sealing ring. A round nut that is screwed onto the connecting pipe is provided on the side of the sealing ring away from the second flange.

[0013] Furthermore, at least two partitions are evenly distributed along the circumference of the connecting pipe in the liquid storage chamber. The side of the partition closest to the connecting pipe is fixedly connected to the connecting pipe, and the side of the partition away from the connecting pipe abuts against the inner wall of the sleeve. Adjacent partitions are staggered along the axial direction of the connecting pipe, and the third hole and the fourth hole are spaced 180° apart along the circumference of the connecting pipe.

[0014] Furthermore, both the connecting pipe and the sleeve are conical, and the small-diameter end of the connecting pipe is close to the feed inlet of the first flow channel and is threadedly connected to the feed inlet.

[0015] Furthermore, the main body is detachably connected to a flange on the side corresponding to the outlet of the flow channel, and the flange is provided with a first outlet hole, which communicates with the outlet of the flow channel.

[0016] Furthermore, the flow channel also includes two second flow channels. The inlets of the two second flow channels are located on the top surface of the main body, and the outlets of the two second flow channels are located on the same side of the main body as the outlet of the first flow channel. The inlets of the two second flow channels are each connected to a second feed connector.

[0017] The positive effects of this utility model are:

[0018] 1. This utility model introduces circulating water into the main body of the die head to control the temperature of the main body, and also introduces circulating water into the first feed joint of the die head to control the temperature of the first feed joint. Together, they control the temperature of the raw material entering the main body, thereby stabilizing the temperature of the raw material entering the mold at the optimal molding temperature of 80℃. This avoids defects such as uneven shrinkage, cracks, bubbles, and tears in the sealing strip after demolding due to excessively high raw material temperature, thereby improving the product qualification rate and molding quality.

[0019] 2. The feed inlets of the four first flow channels of this utility model are located on the four sides of the main body and are arranged in three staggered layers along the height direction. Together with the two second flow channels, the independent feeding and centralized discharge of six raw materials can be realized at the same time. There is no spatial interference or dead corners between the first and second flow channels, thus ensuring the uniform flow rate when multiple raw materials are co-extruded.

[0020] 3. The main body and the mold are connected by a detachable flange. When the connecting threads on the flange wear due to frequent disassembly and assembly of the mold, only the flange needs to be replaced. There is no need to repair or replace the main body, which greatly reduces the maintenance cost and downtime of the equipment.

[0021] 4. The first feed connector is detachably connected to the main body. The first feed connector can be quickly disassembled, and the upper and lower cover plates of the main body are also detachable. This facilitates the cleaning of scale and impurities in the liquid storage chamber inside the first connector, as well as in the first, second, third, and fourth liquid storage chambers of the main body, ensuring the long-term temperature control stability of this invention. The first, second, third, and fourth liquid storage chambers within the main body are located at the upper and lower parts of the main body and adopt a series circulation structure, increasing the heat exchange area with the main body and enabling uniform temperature control. The liquid storage chamber within the first feed connector forms an S-shaped cooling channel under the partition, extending the heat exchange path and significantly improving the temperature control effect. Simultaneously, with circulating water of high specific heat capacity, temperature fluctuations are small, and temperature control accuracy is higher. Attached Figure Description

[0022] Figure 1 These are perspective views of Examples 1 and 2;

[0023] Figure 2 The explosions in Examples 1 and 2 Figure 1 ;

[0024] Figure 3 The explosions in Examples 1 and 2 Figure 2 ;

[0025] Figure 4 These are bottom views of embodiments 1 and 2;

[0026] Figure 5 yes Figure 4 A cross-sectional view of the AA section;

[0027] Figure 6 These are front views of embodiments 1 and 2;

[0028] Figure 7 yes Figure 6 A sectional view of the BB section;

[0029] Figure 8 yes Figure 6 A sectional view of the CC section;

[0030] Figure 9 yes Figure 6 A sectional view of the DD section;

[0031] Figure 10 It is the three-dimensional representation of Example 3. Figure 1 ;

[0032] Figure 11 It is the three-dimensional representation of Example 3. Figure 2 ;

[0033] Figure 12 The explosion in Example 3 Figure 1 ;

[0034] Figure 13 The explosion in Example 3 Figure 2 ;

[0035] Figure 14 This is a cross-sectional view of the first feed joint;

[0036] Figure 15 It was an explosion at the first feed joint. Figure 1 ;

[0037] Figure 16 It was an explosion at the first feed joint. Figure 2 ;

[0038] In the picture:

[0039] 1. First feed connector; 2. Second feed connector; 3. Lower cover plate; 4. Flange; 5. Upper cover plate; 6. Temperature sensor; 7. Second discharge port; 8. First discharge port; 9. First flow channel; 10. Second flow channel; 11. Third storage chamber; 12. Upper partition bar; 13. Second storage chamber; 14. Second guide hole; 15. Second hole; 16. First hole; 17. Main body; 18. First guide hole; 19. First storage chamber; 20. Lower partition bar; 21. Fourth storage chamber; 22. Round nut; 23. Sealing ring; 24. Third hole; 25. Sleeve; 26. Storage cavity; 27. Connecting pipe; 28. Fourth hole; 29. ​​Partition plate; 30. O-ring; 31. First flange; 32. Second flange; 33. Third flange. Detailed Implementation

[0040] For ease of description, the side of the main body 17 that is connected to the flange 4 will be referred to as the "front" in the following description.

[0041] Example 1

[0042] like Figures 1 to 9 As shown, an extruder head includes a main body 17. The main body 17 is made of cubic material, and two sides of the material are milled and chamfered, thus forming six sides of the main body 17. Six flow channels for conveying the material are provided through the main body 17, namely four first flow channels 9 and two second flow channels 10.

[0043] The discharge ports of the four first flow channels 9 are all located at the front of the main body 17. The four discharge ports corresponding to the four first flow channels 9 are evenly distributed in a circular direction with the intersection of the two diagonals at the front of the main body 17 as the center. The inlets of the four first flow channels 9 are located on the four sides other than the rear and front of the main body 17. The center lines of the four first flow channels 9 are all set in the horizontal direction. The four first flow channels 9 are arranged in three layers in the height direction: upper, middle and lower. Two of the first flow channels 9 are located in the middle layer, and the other two are located in the upper and lower layers, respectively.

[0044] The main body 17 is covered with an upper cover plate 5, which is bolted to the top surface of the main body 17 and sealed with a sealing strip. The main body 17 is covered with a lower cover plate 3, which is bolted to the bottom surface of the main body 17 and sealed with a sealing strip.

[0045] A third liquid storage chamber 11 and a second liquid storage chamber 13 are provided between the main body 17 and the upper cover plate 5. An upwardly protruding upper partition 12 is formed between the third liquid storage chamber 11 and the second liquid storage chamber 13 on the main body 17. A gap exists between the upper partition 12 and the upper cover plate 5, thereby connecting the top of the third liquid storage chamber 11 and the top of the second liquid storage chamber 13. A fourth liquid storage chamber 21 and a first liquid storage chamber 19 are provided between the main body 17 and the lower cover plate 3. A downwardly protruding lower partition 20 is formed between the fourth liquid storage chamber 21 and the first liquid storage chamber 19 on the main body 17. The lower part of the lower partition 20 abuts against the lower cover plate 3, thereby isolating the fourth liquid storage chamber 21 and the first liquid storage chamber 19.

[0046] The main body 17 is provided with a vertical second liquid guide hole 14 that connects the third liquid storage chamber 11 and the fourth liquid storage chamber 21. The main body 17 is also provided with a vertical first liquid guide hole 18 that connects the first liquid storage chamber 19 and the second liquid storage chamber 13. The lower cover plate 3 is provided with a second hole 15 and a first hole 16. The first hole 16 is connected to the first liquid storage chamber 19, and the second hole 15 is connected to the fourth liquid storage chamber 21.

[0047] The inlets of the two second flow channels 10 are located on the top surface of the main body 17, and the outlets of the two second flow channels 10 are also located in front of the main body 17, and are symmetrically arranged on both sides of the outlet of the first flow channel 9 in the upper layer.

[0048] In use, the front of the main body 17 is connected to the mold via bolts. The four discharge ports of the four first flow channels 9 located on the front of the main body 17 are respectively connected to the four feed ports of the mold. The four feed ports of the four first flow channels 9 located on the four sides of the main body 17 are respectively connected to the output pipes of four extruders. The first hole 16 and the second hole 15 are respectively connected to a water source via pipes. The second hole 15 is connected to the water supply pipe of the water source, and the first hole 16 is connected to the water return pipe of the water source. When the water pump of the water source is running, the water from the water source flows through the water supply pipe, sequentially through the second hole 15, the fourth liquid storage chamber 21, the second liquid guide hole 14, the third liquid storage chamber 11, the second liquid storage chamber 13, the first liquid guide hole 18, the first liquid storage chamber 19, and the first hole 16, and then flows back to the water source through the return pipe.

[0049] Therefore, water can circulate between the main body 17 and the water source. By controlling the flow rate and temperature of the water flowing into the main body, the temperature of the main body 17 can be controlled, which in turn can control the temperature of the raw material entering the mold, so that the raw material is kept at the optimal temperature when it enters the mold, thereby avoiding defects in the finished sealing strip due to temperature reasons and ensuring the quality of the finished sealing strip.

[0050] Example 2

[0051] The difference between this embodiment and Embodiment 1 is that:

[0052] A flange 4 is detachably connected to the front of the main body 17 via bolts. Each flange 4 has a first discharge hole 8 at a position corresponding to the discharge port of the first flow channel 9, and the first discharge hole 8 communicates with the corresponding discharge port of the first flow channel 9. Each flange 4 also has a second discharge hole 7 at a position corresponding to the discharge port of the second flow channel 10, and the second discharge hole 7 communicates with the corresponding discharge port of the second flow channel 10.

[0053] Each time the mold is used, it only needs to be connected to the flange of the mold and the flange 4 with bolts (the bolts pass through the holes on the flange of the mold and are screwed into the corresponding threaded holes on the flange 4), thus eliminating the need to directly connect the mold to the main body 17. After a period of use, the threads in the threaded holes on the flange 4 will wear due to repeated disassembly and installation. At this time, only the flange 4 needs to be replaced, without the need to repair the main body 17, thereby reducing the use and maintenance costs of this utility model. In actual production, some flanges 4 can be kept in stock as consumable parts for timely replacement.

[0054] Example 3

[0055] Combination Figures 10 to 16 As shown, the difference between this embodiment and Embodiment 2 is that:

[0056] Each first flow channel 9 has a first feed connector 1 at its inlet. Each first feed connector 1 includes a connecting pipe 27 with one end threaded to the inlet of the first flow channel 9 and a sleeve 25 fitted over the connecting pipe 27. A liquid storage cavity 26 is provided between the sleeve 25 and the connecting pipe 27, surrounding the connecting pipe 27. The sleeve 25 has a fourth hole 28 and a third hole 24 on its wall, both of which communicate with the liquid storage cavity 26.

[0057] like Figures 14 to 16As shown, the left end of the connecting pipe 27 is threadedly connected to the inlet of the first flow channel 9. An annular groove is provided on the outer wall of the middle part of the connecting pipe 27, forming the aforementioned liquid storage cavity 26 between the annular groove and the sleeve 25. The two ends of the annular groove are a first flange 31 and a second flange 32, respectively. Both the first flange 31 and the second flange 32 are integrally formed with the connecting pipe 27. The second flange 32 is close to the first flow channel 9, and both ends of the sleeve 25 are sealed to the first flange 31 and the second flange 32, respectively.

[0058] Two baffles 29 are provided at 180° intervals along the circumference of the connecting pipe 27 inside the liquid storage chamber 26. The side of the baffle 29 closest to the connecting pipe 27 is integrally formed with the connecting pipe 27, and the side of the baffle 29 away from the connecting pipe 27 abuts against the inner wall of the sleeve 25.

[0059] Two partitions 29 are offset along the axial direction of the connecting pipe 27. Specifically, the right end of one partition 29 is integrally formed with the first flange 31, and there is a gap between the left end and the second flange 32. The left end of the other partition 29 is integrally formed with the second flange 32, and there is a gap between the right end and the first flange 31.

[0060] The third hole 24 and the fourth hole 28 are spaced 180° apart along the circumference of the connecting pipe 27. The third hole 24 is close to the second flange 32, and the fourth hole 28 is close to the first flange 31. The third hole 24 and the fourth hole 28 are located between two partitions 29. The two partitions 29 divide the liquid storage chamber 26 into two parts, and the third hole 24 and the fourth hole 28 are connected to the two parts of the liquid storage chamber 26, respectively.

[0061] A sealing ring 23 is provided on the left side of the second flange 32. The sealing ring 23 is sleeved on the outside of the connecting pipe 27. O-rings 30 are clamped between the sealing ring 23 and the sleeve 25, and between the second flange 32 and the sealing ring 23. A round nut 22 is provided on the side of the sealing ring 23 away from the second flange 32, which is screwed onto the connecting pipe 27. An O-ring 30 is also clamped between the sleeve 25 and the first flange 31. After tightening the round nut 22, the sleeve 25 is clamped between the first flange 31 and the sealing ring 23, thus achieving a sealing fit between the sleeve 25 and the first flange 31, between the sleeve 25 and the sealing ring 23, and between the sealing ring 23 and the second flange 32.

[0062] The third hole 24 is connected to the water supply pipe of the water source, and the fourth hole 28 is connected to the return water pipe of the circulating water source, so that water flows through the third hole 24, the liquid storage chamber 26 and the fourth hole 28 in sequence, thereby controlling the temperature of the connecting pipe 27.

[0063] Both the connecting pipe 27 and the sleeve 25 are conical with their smaller diameter ends facing the main body 17. When it is necessary to clean the inside of the liquid storage chamber 26, the connecting pipe 27 can be unscrewed, then the round nut 22 can be unscrewed, and the sealing ring 23 can be removed to easily remove the sleeve 25, and then the inside of the liquid storage chamber 26 can be cleaned. The right end of the connecting pipe 27 is an annular third flange 33, which is used to connect to the connector on the output pipe of the extruder.

[0064] Each of the two second flow channels 10 has a threaded connection to a second feed connector 2, which is a 135° quick-release connector used to connect to the output pipes of the two extruders respectively, thereby enabling this invention to simultaneously supply six different raw materials to the die. Temperature sensors 6 are screwed onto both the second feed connector 2 and the main body 17 for collecting the temperature of the second feed connector 2 and the main body 17.

[0065] Water circulates within the main body 17 and the first feed joint 1, allowing for temperature control of both the main body 17 and the first feed joint 1, thus maintaining the raw material injected into the mold at an optimal temperature. Because temperature control is achieved using circulating water, and the circulating water has a larger heat exchange area with the main body 17 and the first feed joint 1, the temperatures of the main body 17 and the first feed joint 1 are easier to control. Furthermore, due to the high specific heat capacity of water, temperature fluctuations in the main body 17 and the first feed joint 1 are smaller.

[0066] The above-described embodiments are detailed and specific, illustrating preferred embodiments of the present utility model. They are only used to illustrate the technical ideas and features of the present utility model, with the aim of enabling those skilled in the art to understand the content of the present utility model and implement it accordingly. However, they are not limited to the present utility model, and the patent scope of the present utility model cannot be limited by this embodiment alone. That is, any equivalent changes or modifications made to the spirit disclosed in the present utility model, without departing from the structure of the present utility model, such as local improvements within the system and modifications or transformations between subsystems, are still within the patent scope of the present utility model.

Claims

1. An extruder head characterized by, Includes a main body (17), on which at least one flow channel for conveying raw materials is provided. The top of the main body (17) is covered with an upper cover plate (5), and the bottom of the main body (17) is covered with a lower cover plate (3). A third liquid storage chamber (11) and a second liquid storage chamber (13) are provided between the main body (17) and the upper cover plate (5), and a fourth liquid storage chamber (21) and a first liquid storage chamber (19) are provided between the main body (17) and the lower cover plate (3), respectively. The main body (17) is provided with a second liquid guide hole (14) that connects the third liquid storage chamber (11) and the fourth liquid storage chamber (21). The main body (17) is also provided with a first liquid guide hole (18) that connects the first liquid storage chamber (19) and the second liquid storage chamber (13). The lower cover plate (3) is provided with a second hole (15) and a first hole (16). The first hole (16) is connected to the first liquid storage chamber (19), and the second hole (15) is connected to the fourth liquid storage chamber (21).

2. An extruder head as claimed in claim 1, characterized in that The flow channel includes four first flow channels (9), the main body (17) includes a front, a rear and four other sides, the outlets of the four first flow channels (9) are all located in front of the main body (17) and are evenly distributed in the circumferential direction, and the inlets of the four first flow channels (9) are located on the other four sides except for the rear and front of the main body (17).

3. An extruder head as claimed in claim 2, wherein The centerlines of the four first flow channels (9) are all set in the horizontal direction. The four first flow channels (9) are set in three layers in the height direction: upper, middle and lower. Two of the first flow channels (9) are located in the middle layer, and the other two first flow channels (9) are located in the upper and lower layers respectively.

4. An extruder head as defined in claim 1, wherein The flow channel includes a first flow channel (9), and the inlet of the first flow channel (9) is provided with a first feed connector (1). The first feed connector (1) includes a connecting pipe (27) connected at one end to the inlet of the first flow channel (9) and a sleeve (25) sleeved outside the connecting pipe (27). The sleeve (25) is connected to the connecting pipe (27). A liquid storage chamber (26) is provided between the sleeve (25) and the connecting pipe (27). A fourth hole (28) and a third hole (24) are provided on the cylinder wall of the sleeve (25). The fourth hole (28) and the third hole (24) are both connected to the liquid storage chamber (26).

5. An extruder head as claimed in claim 4, wherein The outer wall of the middle part of the connecting pipe (27) is provided with an annular groove. The two ends of the annular groove are a first flange (31) and a second flange (32), respectively. The second flange (32) is close to the first flow channel (9). The two ends of the sleeve (25) are respectively sealed to the first flange (31) and the second flange (32).

6. An extruder head according to claim 5, wherein The second flange (32) is provided with a sealing ring (23) on the side near the first flow channel (9). The sealing ring (23) is sleeved on the outside of the connecting pipe (27). O-rings (30) are sandwiched between the sealing ring (23) and the sleeve (25) and between the second flange (32) and the sealing ring (23). A round nut (22) is provided on the side of the sealing ring (23) away from the second flange (32) and screwed onto the connecting pipe (27).

7. An extruder head as claimed in claim 4, wherein At least two partitions (29) are evenly distributed in the liquid storage chamber (26) along the circumference of the connecting pipe (27). The side of the partition (29) close to the connecting pipe (27) is fixedly connected to the connecting pipe (27), and the side of the partition (29) away from the connecting pipe (27) abuts against the inner wall of the sleeve (25). Adjacent partitions (29) are staggered along the axial direction of the connecting pipe (27). The third hole (24) and the fourth hole (28) are spaced 180° apart along the circumference of the connecting pipe (27).

8. An extruder head as claimed in any one of claims 4 to 7, wherein, Both the connecting pipe (27) and the sleeve (25) are conical. The small diameter end of the connecting pipe (27) is close to the feed inlet of the first flow channel (9) and is threadedly connected to the feed inlet.

9. An extruder head as defined in claim 1, wherein The main body (17) has a flange (4) detachably connected to the side corresponding to the outlet of the flow channel. The flange (4) is provided with a first outlet hole (8), which is connected to the outlet of the flow channel.

10. An extruder head as defined in claim 2, wherein The flow channel also includes two second flow channels (10). The inlets of the two second flow channels (10) are located on the top surface of the main body (17). The outlets of the two second flow channels (10) and the outlet of the first flow channel (9) are located on the same side of the main body (17). The inlets of the two second flow channels (10) are connected to a second feed connector (2).

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