Y-shaped extrusion die

Abstract

The present application relates to the field of rubber mould, especially to a Y-shaped extrusion die, which is arranged on the head of an extruder, and a rotary cutter is also arranged on the head of the extruder, the rotary cutter abuts against the end face of the extrusion die and performs cutting action on the rubber material extruded by the extrusion die, wherein the extrusion die is formed with a Y-shaped discharge port, the discharge port comprises three branch channels, the roots of each branch channel meet, and the center line of one of the branch channels is taken as the symmetry axis of the shape of the discharge port, when the rotary cutter first touches the rubber material of one of the branch channels or first touches the rubber material of two of the branch channels at the same time, the rotary cutter is perpendicular to the symmetry axis, and the head opening width size of the branch channel which is first cut is greater than the head opening width size of the branch channel which is cut later. The Y-shaped extrusion die reduces the thickness difference of the rubber material caused by the cutting sequence, improves the uniformity of the preformed rubber material, and reduces the product scrap rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rubber mold, in particular to a Y-shaped extrusion die. BACKGROUND

[0002] At present, the die with diameter within 30mm and any shape basically does not exist the situation of uneven thickness and deformation of cut rubber, and does not affect the product quality; but the die with diameter above 30mm, in order to ensure uniform flow of rubber, the common symmetrical modeling such as "rice" shape and "cross" shape is adopted, but due to the large diameter of the die, the rubber continues to be extruded in the time period from the beginning of the cutter contacting the rubber to the end of cutting, so that the rubber at the first cutting place is much thinner than that at the last cutting place, especially for the die with diameter above 100mm, the phenomenon is more obvious, resulting in uneven and deformed cut rubber, and high waste rate. SUMMARY

[0003] Based on the above problems, the purpose of the present application is to provide a Y-shaped extrusion die, which solves the problems of uneven preformed rubber and easy deformation, and ensures the product quality.

[0004] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0005] A Y-shaped extrusion die is arranged on the head of an extruder, and a rotary cutter is also arranged on the head of the extruder, which abuts against the end face of the extrusion die and performs cutting action on the rubber extruded by the extrusion die, wherein the extrusion die is formed with a "Y" shaped discharge port, the discharge port includes three branch channels, the root of each branch channel meets, and the center line of one of the branch channels is taken as the symmetry axis of the shape of the discharge port, when the rotary cutter first touches the rubber of one of the branch channels or first touches the rubber of two of the branch channels at the same time, the rotary cutter is perpendicular to the symmetry axis, and the head port width size of the first cut branch channel is greater than that of the last cut branch channel.

[0006] Optionally, the head port width size of the last cut branch channel is 85% to 95% of the head port width size of the first cut branch channel.

[0007] Optionally, the rotation center of the rotary cutter is located on the center horizontal line of the extrusion die, and when the rotary cutter first touches the rubber, the included angle between the rotary cutter and the center horizontal line is equal to the included angle between the symmetry axis and the center vertical line of the extrusion die.

[0008] In summary, compared with the prior art, the Y-shaped extrusion die of the present application is designed with a unique Y-shaped structure, the discharge port size of the first cutting area and the last cutting area is adjusted, and the symmetry axis of the die is designed to face the cutter, so as to reduce the thickness difference of the rubber caused by the first and last cutting, improve the uniformity of the preformed rubber, and reduce the product waste rate. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is a structural schematic view of a Y-shaped extrusion die provided by Embodiment 1 of the present application;

[0010] Figure 2 is a structural schematic view of a Y-shaped extrusion die provided by Embodiment 2 of the present application.

[0011] In the drawings:

[0012] 1, extrusion die; 2, extruder head; 3, rotary cutter; 4, discharge port. DETAILED DESCRIPTION

[0013] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar parts or parts having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0014] In the description of the present application, unless explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, it can be mechanically connected, or it can be electrically connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0015] In the description of the present application, unless explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first feature and the second feature are in direct contact, or that the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature. The technical solutions of the present application are further illustrated below in conjunction with the drawings and through specific embodiments.

[0016] Embodiment 1:

[0017] Please refer to Figure 1 As shown in the figure, the preferred embodiment provides a Y-shaped extrusion die, which is provided on an extruder head 2, and a rotary cutter 3 is also provided on the extruder head 2, which abuts against the end face of the extrusion die 1 and performs cutting action on the rubber material extruded by the extrusion die 1.

[0018] The extrusion die 1 has a Y-shaped discharge port 4. The discharge port 4 includes three material channels. The roots of each material channel converge, and the center line of one of the material channels is used as the axis of symmetry of the shape of the discharge port 4. When the rotating cutter 3 first touches the material of two of the material channels at the same time, the rotating cutter 3 is perpendicular to the axis of symmetry, and the head width of the first two material channels is greater than the head width of the second material channel.

[0019] Preferably, the head opening width of the later-cut material distribution channel is 85% to 95% of the head opening width of the earlier-cut material distribution channel, in order to balance the case where the later-cut material is thicker and reduce the difference in material thickness between the earlier and later cuts. Specifically, in this embodiment, the diameter of the extrusion die 1 is 138mm, the head opening width of the earlier-cut material distribution channel is 29mm, the head opening width of the later-cut material distribution channel is 27mm, and the root opening width of each material distribution channel is 21mm.

[0020] Specifically, the rotation center of the rotary cutter 3 is located on the horizontal center line of the extrusion die 1, and when the rotary cutter 3 begins to touch the material, the angle between the rotary cutter 3 and the horizontal center line is equal to the angle between the axis of symmetry and the vertical center line of the extrusion die 1. In this embodiment, a 21° angle is used as an example. When assembling the extrusion die 1, the 27mm wide feed channel at the head is facing downwards, and as shown... Figure 1 21° to the left of center.

[0021] Example 2:

[0022] Please see Figure 2 As shown, this embodiment provides a Y-shaped extrusion die 1, which is disposed on the extruder head 2. The extruder head 2 is also provided with a rotary cutter 3, which is attached to the end face of the extrusion die 1 and performs a cutting action on the rubber material extruded from the extrusion die 1.

[0023] The extrusion die 1 has a Y-shaped discharge port 4. The discharge port 4 includes three material channels. The roots of each material channel converge, and the center line of one of the material channels is used as the axis of symmetry of the shape of the discharge port 4. When the rotating cutter 3 first touches the material of one of the material channels, the rotating cutter 3 is perpendicular to the axis of symmetry, and the head width of the material channel cut first is greater than the head width of the two material channels cut later.

[0024] Preferably, the head port width size of the later cut distribution channel is 85% to 95% of the head port width size of the earlier cut distribution channel, to balance the situation of thicker later cut rubber thickness, and reduce the difference between the earlier and later cut rubbers. Specifically, in the embodiment, the diameter size of the extrusion die 1 is 138 mm, the head port width size of the earlier cut distribution channel is 29 mm, the head port width size of the later cut distribution channel is 27 mm, and the root port width size of each distribution channel is 21 mm.

[0025] In particular, the rotation center of the rotary cutter 3 is located on the central horizontal line of the extrusion die 1, and when the rotary cutter 3 starts to touch the rubber, the included angle between the rotary cutter 3 and the central horizontal line is equal to the included angle between the symmetry axis and the central vertical line of the extrusion die 1. In the embodiment, the included angle is exemplified as 29°. When the extrusion die 1 is assembled, the distribution channel with a head port width of 29 mm is upward, and the rotary cutter 3 is arranged to be 29° right to the distribution channel. Figure 2 29° right.

[0026] It can be seen that the above Y-shaped extrusion die designs a unique Y-shaped structure, adjusts the discharge port size of the earlier cut area and the later cut area, and makes the symmetry axis of the port die directly opposite the cutter design, thereby reducing the rubber thickness difference caused by the earlier and later cut rubbers, improving the uniformity of the preformed rubber, and reducing the product scrap rate.

[0027] The above embodiments only illustrate the basic principles and characteristics of the present application, and the present application is not limited by the above embodiments. Without departing from the spirit and scope of the present application, the present application has various changes and modifications, and these changes and modifications fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A Y-shaped extrusion die, disposed on an extruder head (2), wherein the extruder head (2) is further provided with a rotary cutter (3), the rotary cutter (3) abutting against the end face of the extrusion die (1) and cutting the rubber extruded from the extrusion die (1), characterized in that, The extrusion die (1) has a Y-shaped outlet (4) formed on it. The outlet (4) includes three material channels. The roots of each material channel intersect, and the center line of one of the material channels is taken as the axis of symmetry of the shape of the outlet (4). When the rotary cutter (3) first touches the material of one of the material channels or first touches the material of two of the material channels at the same time, the rotary cutter (3) is perpendicular to the axis of symmetry, and the head width of the material channel cut first is greater than the head width of the material channel cut later.

2. The Y-shaped extrusion die according to claim 1, characterized in that, The head opening width of the subsequently cut material distribution channel is 85% to 95% of the head opening width of the previously cut material distribution channel.

3. The Y-shaped extrusion die according to claim 1, characterized in that, The rotation center of the rotary cutter (3) is located on the horizontal center line of the extrusion die (1), and when the rotary cutter (3) begins to touch the rubber material, the angle between the rotary cutter (3) and the horizontal center line is equal to the angle between the axis of symmetry and the vertical center line of the extrusion die (1).

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