Extrusion die capable of controlling existence of sizing material

Abstract

The utility model discloses an extrusion die for controlling the existence of a sizing material, which comprises a main body, the main body is provided with a cavity for the extrusion molding of the sizing material and a pouring gate for inputting the sizing material into the cavity, a separator is arranged in the cavity, and the main body is provided with a sizing material inlet channel and a sizing material outlet channel. And a plugging piece is arranged between the glue inlet channel and the glue outlet channel. According to the extrusion die capable of controlling the existence of the sizing material, an independent space can be separated in the cavity through the separator, and the separator and the cavity are respectively communicated with the two extrusion structures, so that the existence of the sizing material in the separator is controlled through the plugging piece, and the variable cross-section extrusion of the sizing material is further realized; and the situation that the cross section of a product is unstable before and after variable-cross-section extrusion of rubber is avoided as much as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of extrusion dies, in particular to an extrusion die for controlling the presence or absence of rubber material. Background Art

[0002] An extrusion die is a tool used to produce continuous length products, usually used to manufacture pipes, wires, plates and other products. Extrusion dies are usually made of metal materials with specific shapes and sizes. The raw rubber is heated to a certain temperature and then extruded through the die by an extruder to form the desired product shape.

[0003] For example, the patent document with the authorization announcement number CN218701123U and the authorization announcement date March 24, 2023, and the name of "An Extrusion Die and Extrusion Equipment", includes a die body, a through hole is provided on the die body, and a cavity body is arranged in the through hole; a blocking channel is arranged on the outlet end face of the die body and / or the cavity body; a blocking block is slidably connected in the blocking channel, suitable for blocking different positions in the blocking section according to the required product shape. The blocking block provided by the patent realizes the production of variable cross-sections by blocking the cavity during the extrusion process, saving rubber.

[0004] In the field of extrusion, in order to achieve cost reduction and efficiency improvement and meet the needs of product functions, more and more variable cross-section extrusion products have emerged. The variable cross-section extrusion of rubber is mainly achieved by the change of the corresponding part of the mold to achieve the change of the extrusion shape. For products with large cross-section changes, there will be a problem: before and after the variable cross-section extrusion, the demand for rubber in the two cross-section states is different, which will cause the product cross-section to be unstable. Utility Model Content

[0005] The utility model aims to provide an extrusion die for controlling the presence or absence of rubber material, so as to solve the above-mentioned shortcomings in the prior art.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An extrusion die for controlling the presence or absence of rubber comprises a main body, the main body is provided with a cavity for rubber extrusion molding and a gate for inputting rubber into the cavity, a partition is provided in the cavity, the main body is constructed with a rubber inlet channel and a rubber outlet channel, and a sealing member is provided between the rubber inlet channel and the rubber outlet channel.

[0008] The above-mentioned extrusion die for controlling the presence or absence of rubber material has a buffer cavity connected to the die cavity constructed on the main body.

[0009] In the above-mentioned extrusion die for controlling the presence or absence of rubber material, the separator is a closed rib fixed to the inner wall of the cavity.

[0010] In the above-mentioned extrusion die for controlling the presence or absence of rubber material, one end of the rubber outlet channel extends into the partition.

[0011] In the above-mentioned extrusion die for controlling the presence or absence of rubber material, the blocking member comprises a sleeve embedded in the main body, a rubber inlet groove is constructed in the sleeve, and two ends of the rubber inlet groove are respectively connected to the rubber inlet channel and the rubber outlet channel.

[0012] In the above-mentioned extrusion die for controlling the presence or absence of rubber material, a needle valve is slidably connected in the rubber inlet groove.

[0013] The above-mentioned extrusion die for controlling the presence or absence of rubber material has a cylinder fixed on the main body, and the output end of the cylinder is connected to a needle valve.

[0014] The above-mentioned extrusion die for controlling the presence or absence of rubber material also includes a pressure sensor for measuring the pressure in the rubber feeding channel.

[0015] In the above technical scheme, the utility model provides an extrusion die for controlling the presence or absence of rubber. By setting a partition, an independent space can be separated in the cavity. The partition and the cavity are respectively connected to two extrusion structures, so that the presence or absence of rubber in the partition is controlled by the blocking piece, thereby realizing variable cross-section extrusion of the rubber, and minimizing the instability of the product cross-section before and after the extrusion of the rubber variable cross-section. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 The overall structural diagram provided for the embodiment of the utility model;

[0018] Figure 2 A top view provided for an embodiment of the utility model;

[0019] Figure 3 A schematic diagram of the buffer chamber structure provided by an embodiment of the utility model;

[0020] Figure 4 A cross-sectional structural diagram of a glue inlet channel provided in an embodiment of the utility model;

[0021] Figure 5 This is a cross-sectional structural diagram of a sleeve provided in an embodiment of the utility model.

[0022] Description of reference numerals:

[0023] 1. Main body; 2. Cavity; 3. Separator; 4. Buffer cavity; 5. Glue inlet channel; 6. Glue outlet channel; 7. Sleeve; 8. Glue inlet groove; 9. Needle valve; 10. Sealing groove; 11. Cylinder; 12. Pressure sensor. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] Reference Figure 1-5 The utility model embodiment provides an extrusion mold for controlling the presence or absence of rubber material, including a main body 1, on which a cavity 2 for rubber material extrusion molding and a gate for inputting rubber material into the cavity 2 are arranged, and a partition 3 is arranged in the cavity 2. A rubber inlet channel 5 and a rubber outlet channel 6 are constructed on the main body 1, and a sealing member is arranged between the rubber inlet channel 5 and the rubber outlet channel 6.

[0026] Specifically, the mold cavity 2 is constructed into a shape corresponding to the cross-section of the extruded rubber material, and the gate is connected to the external extruder structure. When the extruder structure is running, the rubber material can be squeezed into the mold cavity 2 through the gate, so that the rubber material is formed and discharged through the mold cavity 2. The above are all prior arts and will not be repeated here. The innovation of the embodiment of the utility model is that a partition 3 is arranged in the mold cavity 2, and the partition 3 is an internally hollow structure. The partition 3 and the mold cavity 2 are respectively connected to the two extrusion structures to extrude the rubber material through the partition 3 and the mold cavity 2 respectively; one end of the glue outlet channel 6 extends into the partition 3, and the glue inlet channel 5 is connected to the external extruder, so that the external extruder can input the rubber material into the partition 3 through the glue inlet channel 5 and the glue outlet channel 6; the blocking member is located between the glue inlet channel 5 and the glue outlet channel 6, and the blocking member can be a movable block arranged for sliding. When the movable block slides to the glue inlet channel 5 and When the movable block is between the glue outlet channel 6, the external extruder cannot input the glue into the partition 3 through the glue inlet channel 5 and the glue outlet channel 6; when the movable block is moved away from between the glue inlet channel 5 and the glue outlet channel 6, the glue inlet channel 5 and the glue outlet channel 6 are connected, and the external extruder can input the glue into the partition 3 through the glue inlet channel 5 and the glue outlet channel 6 and extrude it into shape. This arrangement can control the operation of the blocking member according to the needs of the material, thereby controlling the presence or absence of glue in the partition 3, so as to realize the variable cross-section extrusion of the glue. The variable cross-section extrusion of the glue can achieve the purpose of reducing costs and increasing efficiency, and can also meet the production needs. In order to meet the needs of product functions, it is best to avoid cutting off the excess part according to the designed cross section after the rubber is extruded and molded; an extra space can be separated in the cavity 2 by the separator 3 (that is, the rubber extruded in the cavity 2 cannot be moved into the separator 3). When there is no rubber extruded in the separator 3, only the rubber is extruded in the cavity 2. At this time, when the rubber is input into the cavity 2 through the gate, the cross-sectional shape of the molding material is the cross-sectional shape of the cavity 2 minus the cross-sectional shape of the separator 3; when the cross-sectional shape of the material needs to be increased (that is, the extruded material needs to increase the part of the rubber extruded in the separator 3), the blocking piece is controlled Unblock the glue inlet channel 5 and the glue outlet channel 6 to input glue into the partition 3 through an external extruder. At this time, the glue is extruded from the partition 3 and the cavity 2 at the same time (the two parts of the glue can be bonded together later to form a whole glue). In this way, the cross-section of the glue can be adaptively changed. The extrusion of the glue with changed cross-section is the variable cross-section extrusion of the glue. The advantage is that, by setting the partition 3 and the blocking member, the presence or absence of glue in the partition 3 can be controlled as needed, thereby adapting to the variable cross-section extrusion of the glue and avoiding as much as possible the instability of the product cross-section before and after the variable cross-section extrusion of the glue.

[0027] An embodiment of the utility model provides an extrusion die for controlling the presence or absence of rubber material. By setting a partition 3, an independent space can be separated in the cavity 2. The partition 3 and the cavity 2 are respectively connected to the two extrusion structures, so that the variable cross-section extrusion of the rubber material can be achieved by controlling the presence or absence of rubber material in the partition 3, and the instability of the product cross-section before and after the variable cross-section extrusion of the rubber material can be avoided as much as possible.

[0028] The utility model provides another embodiment, further, the main body 1 is constructed with a buffer cavity 4 connected with the cavity 2. Specifically, the gate is connected with the buffer cavity 4, and when the rubber is filled into the cavity 2 through the gate, the rubber is discharged through the buffer cavity 4 and the cavity 2, so that the flow direction and flow speed of the rubber can be controlled to ensure that the rubber fills the cavity 2 evenly and avoids holes or bubbles as much as possible; when the cross-sectional shape of the extruded rubber is more complicated, multiple buffer cavities 4 can be provided to fill the cavity 2 with rubber through multiple buffer cavities 4, thereby improving the quality and efficiency of the extruded rubber.

[0029] Preferably, the separator 3 is a closed rib fixed to the inner wall of the cavity 2. Specifically, the thickness of the closed rib is small, so as to avoid a gap between the two parts of the rubber material extruded from the cavity 2 and the separator 3 during bonding, and the closed rib is a closed shape as a whole, and its internal space is used for extruding the rubber material.

[0030] As an alternative to the above-mentioned sliding movable block, preferably, the blocking member includes a sleeve 7 embedded in the main body 1, and a glue feed groove 8 is constructed in the sleeve 7, and the two ends of the glue feed groove 8 are respectively connected to the glue feed channel 5 and the glue outlet channel 6. Specifically, a needle valve 9 is slidably connected in the glue feed groove 8; a sealing groove 10 connected to the glue feed groove 8 is constructed in the sleeve 7 along its axial direction, and the needle valve 9 is arranged along the axial direction of the sleeve 7 and slidably connected in the sealing groove 10, so that the needle valve 9 can slide in the glue feed groove 8 through the sealing groove 10; both ends of the glue feed groove 8 are constructed as openings, one opening is located on the side wall of the sleeve 7 and is connected to the glue feed channel 5, and the other opening is located at the end of the sleeve 7 and is connected to the glue outlet channel 6; the inner diameter of the glue feed groove 8 is larger than the diameter of the needle valve 9, and the diameter of the end of the needle valve 9 is the same as the inner diameter of the opening at the end of the sleeve 7, such as The function of this arrangement is that when the needle valve 9 moves along the sealing groove 10, it has a first position and a second position. When the needle valve 9 is in the first position, the end of the needle valve 9 moves out from the opening at one end of the glue feed groove 8 (the opening at the end of the sleeve 7), and at this time, the glue can be input into the partition 3 through the glue feed channel 5, the glue feed groove 8 and the glue outlet channel 6; when the needle valve 9 is in the second position, the end of the needle valve 9 moves to the opening at one end of the glue feed groove 8 (the opening at the end of the sleeve 7) and blocks the opening, so that the needle valve 9 can prevent the glue from being transported from the glue feed channel 5 to the glue outlet channel 6.

[0031] In the above embodiment, the driving force for the needle valve 9 to move along the sealing groove 10 can be a linear driving structure such as an electric push rod in the prior art. Preferably, a cylinder 11 is fixed on the main body 1, and the output end of the cylinder 11 is connected to the needle valve 9. Specifically, a bracket is fixed on the main body 1, and the cylinder 11 is fixed on the bracket and the output end of the cylinder 11 is fixed to the needle valve 9, so that the needle valve 9 can be driven by the cylinder 11 to move along the sealing groove 10, thereby driving the needle valve 9 to move to the first position or the second position, and then switching the state of the rubber feeding mechanism to adapt to the variable cross-section extrusion of the rubber material.

[0032] In another embodiment provided by the utility model, further, it also includes a pressure sensor 12 for measuring the pressure in the glue feeding channel 5. Specifically, in this embodiment, the pressure sensor 12, the cylinder 11 and the extruder (the extruder connected to the glue feeding channel 5) are all connected in communication; when the cylinder 11 drives the needle valve 9 to move to the second position, no rubber flows out of the partition 3, and the extruder continues to operate during this process, so that the pressure in the glue feeding channel 5 continues to increase. When the pressure sensor 12 measures that the pressure in the glue feeding channel 5 increases to a set value, the extruder stops running; when the cylinder 11 drives the needle valve 9 to move to the first position, the extruder runs synchronously, so that the rubber is input into the partition 3 through the extruder. The advantage of such a setting is that when the needle valve 9 moves from the first position to the second position, the extruder keeps running until the pressure sensor 12 measures that the pressure in the glue feed channel 5 increases to the set value, and the extruder speed begins to gradually decrease until it stops. In this way, the needle valve 9 can be used to timely prevent the rubber from entering the partition 3, and the rubber in the glue feed channel 5 can be kept at a certain pressure; when the needle valve 9 moves from the second position to the first position, the extruder inputs the rubber into the partition 3 through the glue feed channel 5, the glue feed groove 8 and the glue outlet channel 6. Since the pressure of the rubber in the glue feed channel 5 is relatively large, when the needle valve 9 moves to the first position, the rubber can be timely transported to the partition 3 to ensure the timeliness and stability of the rubber extrusion when the rubber cross-section is varied, thereby improving the adaptability of the device, avoiding the situation where the rubber in the partition 3 cannot be extruded in time, and avoiding the unstable situation such as holes in the rubber in the partition 3.

[0033] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An extrusion die for controlling the presence or absence of rubber material, comprising a main body, the main body being provided with a cavity for rubber material extrusion molding and a gate for inputting rubber material into the cavity, characterized in that: A partition is arranged in the cavity, a glue inlet channel and a glue outlet channel are constructed on the main body, and a blocking piece is arranged between the glue inlet channel and the glue outlet channel.

2. An extrusion die for controlling the presence or absence of rubber material according to claim 1, characterized in that: The main body is provided with a buffer cavity which is communicated with the mold cavity.

3. An extrusion die for controlling the presence or absence of rubber material according to claim 1, characterized in that: The separator is a closed rib fixed on the inner wall of the cavity.

4. The extrusion die for controlling the presence or absence of rubber material according to claim 1, characterized in that: One end of the glue outlet channel extends into the partition.

5. The extrusion die for controlling the presence or absence of rubber material according to claim 1, characterized in that: The blocking member comprises a sleeve embedded in the main body, a glue inlet groove is configured in the sleeve, and two ends of the glue inlet groove are respectively connected to a glue inlet channel and a glue outlet channel.

6. An extrusion die for controlling the presence or absence of rubber material according to claim 5, characterized in that: A needle valve is slidably connected in the glue feeding groove.

7. An extrusion die for controlling the presence or absence of rubber material according to claim 6, characterized in that: A cylinder is fixed on the main body, and an output end of the cylinder is connected to a needle valve.

8. An extrusion die for controlling the presence or absence of rubber material according to claim 7, characterized in that: Also included is a pressure sensor for measuring the pressure in the glue feeding channel.

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