阅读说明：本技术 一种基于挤出机的宽幅胶片挤出成型机头装置 (Wide-width film extrusion molding machine head device based on extruder ) 是由 汪传生 张德伟 王孔烁 翟天剑 于本会 李利 郭磊 尹凤福 边慧光 李绍明 田晓 于 2020-06-11 设计创作，主要内容包括：本发明公开一种基于挤出机的宽幅胶片挤出成型机头装置,其特征在于：包括设置在短纤维复合取向机头装置内的分流导向块,所述挤出机包括单螺杆挤出机和双螺杆挤出机；所述胶料能通过分流导向块挤出短纤维复合取向增强胶片。具体包括上机头体、下机头体、过渡连接法兰、分流导向块、条形阻滞块；上机头体和下机头体之间设有流道,流道为由中间呈流线型向外两侧延展的锥形结构；本发明解决了现有技术中生产成本较高,胶料沿轴线垂直方向扩展,使进入复合取向流道的胶料各点速度不均匀,宽幅胶片的质量较差,难以实现宽幅胶片的连续性生产的技术问题。(The invention discloses a wide film extrusion molding machine head device based on an extruder, which is characterized in that: the device comprises a shunting guide block arranged in a short fiber composite orientation machine head device, wherein the extruder comprises a single-screw extruder and a double-screw extruder; the rubber material can extrude out the short fiber composite orientation reinforced rubber sheet through the shunting guide block. The device specifically comprises an upper machine head body, a lower machine head body, a transition connecting flange, a shunting guide block and a strip-shaped blocking block; a flow channel is arranged between the upper machine head body and the lower machine head body, and the flow channel is of a conical structure extending outwards from the middle in a streamline shape; the invention solves the technical problems that the production cost is high, the rubber material expands along the vertical direction of the axis, the speed of each point of the rubber material entering the composite orientation flow channel is not uniform, the quality of the wide rubber sheet is poor, and the continuous production of the wide rubber sheet is difficult to realize in the prior art.)

1. The utility model provides a broad width film extrusion moulding aircraft nose device based on extruder which characterized in that: the device comprises a shunting guide block arranged in a short fiber transverse orientation machine head device, wherein the extruder comprises a single-screw extruder and a double-screw extruder; the sizing material can extrude the short fiber transverse orientation reinforced film through the shunting guide block.

2. The extruder-based wide film extrusion molding head device of claim 1, wherein: a wide film extrusion molding machine head device based on a single-screw extruder comprises an upper machine head body (1), a lower machine head body (2), a transition connecting flange (3), a shunting guide block a (4), a shunting guide block b (5), a shunting guide block c (6), a shunting guide block d (7), a shunting guide block e (8), a shunting guide block f (9) and a strip-shaped blocking block (10);

a flow channel is arranged between the upper machine head body (1) and the lower machine head body (2), and the flow channel is of a conical structure which extends outwards from the middle to two sides in a streamline form.

3. The extruder-based wide film extrusion molding head device of claim 2, wherein: the shape of the shunting guide block a (4) can be regarded as being composed of an isosceles right triangle and a semicircle; the shapes of the shunt guide block b (5), the shunt guide block c (6) and the shunt guide block e (8) can be regarded as being composed of an equilateral triangle and a semicircle; the glue attack angle of the shunting guide block d (7) and the shunting guide block f (9) is 60 degrees, and the shunting guide block d (7) and the shunting guide block f (9) are symmetrically distributed;

one end of the transition connecting flange (3) is connected with the single-screw extruder, and the other end of the transition connecting flange is connected with the machine head; the machine head comprises an upper machine head body (1) and a lower machine head body (2).

4. The extruder-based wide film extrusion molding head device of claim 2, wherein: the upper machine head body (1) and the lower machine head body (2) are fixed together through bolts, the transition connecting flange (3) is connected with the single-screw extruder at the right side, and the right side surface formed by the upper machine head body (1) and the lower machine head body (2) is connected with the single-screw extruder at the left side.

5. The extruder-based wide film extrusion molding head device of claim 4, wherein: the shape of the internal flow passage of the transition connecting flange (3) is in conical transition from round to rectangle.

6. The extruder-based wide film extrusion molding head device of claim 2, wherein:

the flow channel is divided into three rows from left to right, the first row is sequentially provided with a shunting guide block e (8) and a shunting guide block f (9) from top to bottom, the second row is sequentially provided with a shunting guide block b (5) and a shunting guide block c (6) from top to bottom, and the third row is provided with a shunting guide block a (4); the shunting guide blocks are distributed in a staggered manner.

7. The extruder-based wide film extrusion molding head device of claim 6, wherein:

the arc surfaces of the shunting guide block a (4), the shunting guide block b (5), the shunting guide block c (6), the shunting guide block d (7), the shunting guide block e (8) and the shunting guide block f (9) face the extrusion direction of the sizing material, namely the horizontal direction.

8. The extruder-based wide film extrusion molding head device of claim 1, wherein: the double-screw extruder-based short fiber composite orientation machine head device in the wide film comprises an upper machine head body (1), a lower machine head body (2), a transition connecting flange (3), a shunting guide block a (4), a shunting guide block b (5), a shunting guide block c (6) and a strip-shaped blocking block (7).

9. The extruder-based wide film extrusion molding head device of claim 8, wherein:

a flow channel is arranged between the upper machine head body (1) and the lower machine head body (2), and the flow channel is of a conical structure which extends outwards from the middle in a streamline shape; a shunt guide block a (4), a shunt guide block b (5) and a shunt guide block c (6) are arranged in the flow channel, and three shunt guide blocks are arranged in total and are symmetrically distributed by taking the axis as the center;

the shape of the shunt guide block a (4) can be regarded as being composed of an equilateral triangle and a semicircle; the glue attack angle of the shunting guide block b (5) and the shunting guide block c (6) is 60 degrees, and the shunting guide block b and the shunting guide block c are symmetrically distributed;

the flow channel is divided into two rows from left to right, the first row is sequentially provided with two shunting guide blocks, namely shunting guide blocks c (6) and shunting guide blocks b (5), which are axially symmetrically distributed from top to bottom, and the second row is provided with shunting guide blocks a (4).

10. A method for extruding short fiber composite oriented wide-width films based on a single-screw extruder comprises the following steps:

1) rubber enters a flow channel from the middle part of a machine head through a transition connecting flange under the pressurization effect of a double-screw extruder, is forcibly shunted when passing through a shunting guide block a (4), is expanded to two sides in a streamline shape, is shunted and guided again through a shunting guide block b (5) and a shunting guide block c (6), is further expanded to two sides, and reaches a strip-shaped blocking block in advance when the rubber is relatively fast and then reaches the strip-shaped blocking block successively when the rubber is relatively slow;

2) when the height of the rubber material is consistent, the rubber material crosses the strip-shaped blocking block, and finally the rubber material uniformly flows out through the die of the machine head.

Technical Field

The invention belongs to the technical field of rubber industrial production equipment, and particularly relates to a wide film extrusion molding machine head device based on an extruder.

Background

At present, a wide film extruder is a main device for producing wide films by adopting an extrusion calendering method, the product quality of the films can be greatly improved by adopting the extrusion calendering method to produce the wide films, the defects of the traditional production process can be overcome, and the production efficiency of the films can be greatly improved.

The wide film extruder mainly comprises a pin cold feed extruder and a wide film machine head, wherein the extruder determines the maximum capacity of the equipment, and the machine head determines the product specification which can be produced by the equipment. The maximum capacity of the domestic maximum-size pin cold feed extruder is about 4000kg/h, and the conventional width specification of the wide film is about 600-2500 mm.

The short fiber/rubber composite material (SFRC) is a novel high polymer material and has the rigidity of short fibers and the high elasticity of rubber. The application industry covers almost all rubber products.

The orientation of the short fibers in the rubber matrix can not only improve the physical and mechanical properties of the composite material, but also endow the composite material with excellent anisotropy, so that the rubber product of the short fiber rubber composite material has wide application range and important industrial application value.

Chinese patent CN200810140160.0 specifically relates to a radial orientation extrusion molding method of short fiber reinforced rubber composite material, which comprises the steps of firstly carrying out extrusion processing on a rubber melt containing short fibers in an extruder; extruding rubber into an axial orientation flow channel at the tail end of a screw in an extruder barrel, and realizing the axial orientation of short fibers in the axial orientation flow channel of the machine head by utilizing the flow direction orientation of rubber; the rubber material after axial orientation passes through a dam formed by the thickness of a contraction flow channel under the action of extrusion pressure, and short fibers in the rubber material are rolled and inclined in the process that the rubber material rapidly expands after passing through the dam by utilizing the characteristic of rubber extrusion expansion; the expanded sizing material continues to flow along the flow channel, the inclination is intensified in the middle and edge parts of the flow channel due to the velocity gradient, the radial orientation of the short fiber is increased, and further the radial orientation is realized.

CN206374171U relates to short-staple radial orientation reinforcing tread rubber extrusion moulding device, including entry, changeover portion, orientation section and the oral template that links together, the orientation section embeds there is continuous dam, and the runner of orientation section is formed by regulating block and mirror symmetry's continuous dam structure that hinders, and its structure is mirror symmetry inequality height double wave crest wave structure, and continuous dam structure hinders in the orientation section and hinders the dam crest and reduce step by step, the valley value increases step by step, extrudes the bush at last, realizes the radial orientation of short-staple, the utility model discloses can realize fibrous radial orientation process in current refabrication tire tread forming equipment, do not change ripe refabrication tire tread forming technology, utilize short-staple in the sizing material reinforcing its extrusion expansibility and best aircraft nose size to make short-staple better radial orientation when crest and trough under specific size and proportion. However, in the prior art, the production cost is high, the rubber material expands along the vertical direction of the axis, so that the speed of each point of the rubber material entering the flow channel is not uniform, the quality of the wide rubber sheet is poor, and the continuous production of the wide rubber sheet is difficult to realize.

Disclosure of Invention

In view of the above, the invention provides a wide film extrusion molding machine head device based on an extruder, which is developed and designed to realize uniform extrusion of rubber materials in wide films.

In order to achieve the above purpose, the embodiment of the present invention is implemented by adopting the following technical solutions:

a wide film extrusion molding machine head device based on an extruder comprises a shunting guide block arranged in the wide film extrusion molding machine head device based on the extruder, wherein the extruder comprises a single-screw extruder and a double-screw extruder; the rubber material can extrude short fiber reinforced rubber sheets through the shunting guide block;

preferably, the wide film extrusion molding machine head device based on the single-screw extruder comprises an upper machine head body 1, a lower machine head body 2, a transition connecting flange 3, a shunt guide block a4, a shunt guide block b5, a shunt guide block c6, a shunt guide block d7, a shunt guide block e8, a shunt guide block f9 and a strip-shaped blocking block 10;

preferably, a flow channel is arranged between the upper machine head body 1 and the lower machine head body 2, and the flow channel is of a conical structure extending outwards from the middle in a streamline shape;

the flow channel is provided with a shunt guide block a4, a shunt guide block b5, a shunt guide block c6, a shunt guide block d7, a shunt guide block e8 and a shunt guide block f9, and the six shunt guide blocks are symmetrically distributed by taking an axis as a center.

The shape of the diversion guide a4 can be seen as consisting of an isosceles right triangle and a semicircle. The shapes of the branch guide piece b5, the branch guide piece c6, and the branch guide piece e8 can be regarded as being composed of an equilateral triangle and a semicircle. The glue attack angle of the shunt guide block d7 and the shunt guide block f9 is 60 degrees, and the shunt guide block d7 and the shunt guide block f9 are symmetrically distributed.

Preferably, one end of the transition connecting flange 3 is connected with the single-screw extruder, and the other end of the transition connecting flange is connected with the machine head; the machine head comprises an upper machine head body 1 and a lower machine head body 2;

further, the upper machine head body 1 and the lower machine head body 2 are fixed together through bolts, the transition connecting flange 3 is connected with the single-screw extruder at the right side, and the right side surface formed by the upper machine head body 1 and the lower machine head body 2 is connected with the single-screw extruder at the left side;

the shape of the internal flow passage of the transition connecting flange 3 is in conical transition from round to rectangle. The upper machine head body 1 and the lower machine head body 2 are connected by bolts.

Preferably, the flow channel is divided into three rows from left to right, the first row is sequentially provided with a diversion guide block e8 and a diversion guide block f9 from top to bottom, the second row is sequentially provided with a diversion guide block b5 and a diversion guide block c6 from top to bottom, and the third row is provided with a diversion guide block a 4; the shunting guide blocks are distributed in a staggered manner;

further, the arc surfaces of the shunting guide block a4, the shunting guide block b5, the shunting guide block c6, the shunting guide block d7, the shunting guide block e8 and the shunting guide block f9 face the glue extrusion direction, namely the horizontal direction;

the invention also relates to an extrusion method of the wide film extrusion molding machine head device based on the single-screw extruder, which comprises the following steps:

1) rubber enters the flow channel from the middle of the machine head through the transition connecting flange 3 under the pressurization effect of the single-screw extruder, is forcibly shunted when passing through the shunting guide block a4, and the rubber expands in a streamline shape towards two sides;

2) the rubber material is shunted and guided again by the shunting guide block b5 and the shunting guide block c6, the rubber material is further expanded to two sides, and then is shunted and guided again by the shunting guide block d7, the shunting guide block e8 and the shunting guide block f9, the rubber material is further expanded to two sides, the rubber material with relatively high speed reaches the strip-shaped retarding block 10 in advance, and the rubber material with relatively low speed reaches the strip-shaped retarding block 10 successively; when the height of the rubber material is consistent, the rubber material crosses the strip-shaped block 10, and finally the rubber material uniformly flows out through the die of the machine head.

Preferably, the wide film extrusion molding machine head device based on the double-screw extruder comprises an upper machine head body 1, a lower machine head body 2, a transition connecting flange 3, a shunting guide block a4, a shunting guide block b5, a shunting guide block c6 and a strip-shaped blocking block 7;

preferably, a flow channel is arranged between the upper machine head body 1 and the lower machine head body 2, and the flow channel is of a conical structure which extends outwards from the middle in a streamline shape. The flow channel is provided with a shunt guide block a4, a shunt guide block b5 and a shunt guide block c6, and the three shunt guide blocks are symmetrically distributed by taking the axis as the center;

preferably, the shape of the diverging guide blocks a4 can be regarded as being composed of an equilateral triangle and a semicircle. The glue attack angle of the shunt guide block b5 and the shunt guide block c6 is 60 degrees, and the shunt guide block b5 and the shunt guide block c6 are symmetrically distributed.

Preferably, the flow channel is divided into two rows from left to right, the first row is sequentially provided with two axially symmetrically distributed shunting guide block shunting guide blocks c6 and shunting guide blocks b5 from top to bottom, and the second row is provided with shunting guide blocks a 4;

preferably, one end of the transition connecting flange 3 is connected with the double-screw extruder, and the other end of the transition connecting flange is connected with the machine head; the shape of the internal flow passage of the transition connecting flange 3 is in conical transition from round to rectangle.

The upper machine head body 1 and the lower machine head body 2 are connected by bolts; the machine head and the double-screw extruder adopt a flange connection mode;

the central axes of the machine head, the transition connecting flange 3 and the double-screw extruder are all positioned on the same straight line.

Further, the arc surfaces of the shunting guide block a4, the shunting guide block b5 and the shunting guide block c6 face the extrusion direction of the sizing material, namely the horizontal direction;

the invention also relates to an extrusion method of the wide film extrusion molding machine head device based on the double-screw extruder, which comprises the following steps:

1) rubber enters a flow channel from the middle part of a machine head through a transition connecting flange under the pressurization effect of a double-screw extruder, is forcibly shunted when passing through a shunting guide block a4, is expanded to two sides in a streamline shape, is shunted and guided again through a shunting guide block b5 and a shunting guide block c6, is further expanded to two sides, and reaches a strip-shaped retardation block in advance when the speed is relatively high and then reaches the strip-shaped retardation block successively when the speed is relatively low;

2) when the height of the rubber material is consistent, the rubber material crosses the strip-shaped blocking block, and finally the rubber material uniformly flows out through the die of the machine head.

The technical scheme of the invention at least has the following advantages and beneficial effects:

compared with the prior art, the rubber material enters the machine head flow channel through the transition connecting flange, and is subjected to flow division and guide for multiple times under the action of the flow division guide blocks in different shapes, so that the rubber material is expanded along the vertical direction of the axis, and finally, the uniform speed of each point of the outlet is realized; the rubber sheet extruding device is simple in structure, capable of effectively and uniformly extruding rubber materials, effectively improving the quality of the wide rubber sheet, achieving continuous production of the wide rubber sheet, improving the production efficiency, friendly in use environment and remarkably reducing the production cost.

Drawings

FIG. 1 is a right side view of a configuration according to an aspect of the present invention;

FIG. 2 is a front view of a first embodiment of the present invention;

FIG. 3 is a cross-sectional view of a first embodiment of the present invention;

FIG. 4 is a structural outline view of a head portion transition connecting flange according to the present invention;

wherein, the part names corresponding to the reference numbers are as follows:

the device comprises a machine top body 1, a machine bottom body 2, a transition connecting flange 3, a shunt guide block 4 a, a shunt guide block 5 b, a shunt guide block 6 c, a shunt guide block 7 d, a shunt guide block 8 e, a shunt guide block 9 f and a strip-shaped blocking block 10.

FIG. 5 is an isometric view of a second embodiment of the present invention;

FIG. 6 is a front view of a second embodiment of the present invention;

FIG. 7 is a structural sectional view of a second embodiment of the present invention;

FIG. 8 is a structural outline view of a transition connecting flange of a second machine head part according to the scheme of the invention;

wherein, the part names corresponding to the reference numbers are as follows:

1 upper machine head body, 2 lower machine head body, 3 transition connecting flange, 4 shunting guide block a, 5 shunting guide block b, 6 shunting guide block c and 7 strip-shaped retardation block.

Note: the arrows in the figure indicate the direction of flow of the staple fibres with the size.

Detailed Description

The invention is described below with reference to the accompanying drawings and specific embodiments.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments.

Thus, the following detailed description of the embodiments of the invention is not intended to limit the scope of the invention as claimed, but is merely representative of some embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used. Such terms are merely used to facilitate describing the invention and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

It should also be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

[ PROBLEM I ]

As shown in fig. 1-4, a wide film extrusion molding machine head device based on a single screw extruder comprises an upper machine head body 1, a lower machine head body 2, a transition connecting flange 3, a diversion guide block a4, a diversion guide block b5, a diversion guide block c6, a diversion guide block d7, a diversion guide block e8, a diversion guide block f9, and a strip-shaped retardation block 10;

as a preferred embodiment of the invention, a flow channel is arranged between the upper machine head body 1 and the lower machine head body 2, and the flow channel is of a conical structure extending outwards from the middle in a streamline shape;

the flow channel is provided with a shunt guide block a4, a shunt guide block b5, a shunt guide block c6, a shunt guide block d7, a shunt guide block e8 and a shunt guide block f9, and the six shunt guide blocks are symmetrically distributed by taking an axis as a center.

The shape of the diversion guide a4 can be seen as consisting of an isosceles right triangle and a semicircle. The shapes of the branch guide piece b5, the branch guide piece c6, and the branch guide piece e8 can be regarded as being composed of an equilateral triangle and a semicircle. The glue attack angle of the shunt guide block d7 and the shunt guide block f9 is 60 degrees, and the shunt guide block d7 and the shunt guide block f9 are symmetrically distributed.

As a preferred embodiment of the invention, one end of the transition connecting flange 3 is connected with the single-screw extruder, and the other end is connected with the machine head; the machine head comprises an upper machine head body 1 and a lower machine head body 2;

further, the upper machine head body 1 and the lower machine head body 2 are fixed together through bolts, the transition connecting flange 3 is connected with the single-screw extruder at the right side, and the right side surface formed by the upper machine head body 1 and the lower machine head body 2 is connected with the single-screw extruder at the left side;

the shape of the internal flow passage of the transition connecting flange 3 is in conical transition from round to rectangle. The upper machine head body 1 and the lower machine head body 2 are connected by bolts.

As a preferred embodiment of the present invention, the flow path is divided into three rows from left to right, the first row is provided with a diversion guide block e8 and a diversion guide block f9 in sequence from top to bottom, the second row is provided with a diversion guide block b5 and a diversion guide block c6 in sequence from top to bottom, and the third row is provided with a diversion guide block a 4; the shunting guide blocks are distributed in a staggered manner;

further, the arc surfaces of the shunting guide block a4, the shunting guide block b5, the shunting guide block c6, the shunting guide block d7, the shunting guide block e8 and the shunting guide block f9 face the glue extrusion direction, namely the horizontal direction;

the invention also relates to an extrusion method of the wide film extrusion molding machine head device based on the single-screw extruder, which comprises the following steps:

1) rubber enters the flow channel from the middle of the machine head through the transition connecting flange 3 under the pressurization effect of the single-screw extruder, is forcibly shunted when passing through the shunting guide block a4, and the rubber expands in a streamline shape towards two sides;

2) the rubber material is shunted and guided again by the shunting guide block b5 and the shunting guide block c6, the rubber material is further expanded to two sides, and then is shunted and guided again by the shunting guide block d7, the shunting guide block e8 and the shunting guide block f9, the rubber material is further expanded to two sides, the rubber material with relatively high speed reaches the strip-shaped retarding block 10 in advance, and the rubber material with relatively low speed reaches the strip-shaped retarding block 10 successively; when the height of the rubber material is consistent, the rubber material crosses the strip-shaped block 10, and finally the rubber material uniformly flows out through the die of the machine head.

[ PROBLEM II ]

The invention relates to a wide film extrusion molding machine head device based on a double-screw extruder, which comprises an upper machine head body 1, a lower machine head body 2, a transition connecting flange 3, a shunting guide block a4, a shunting guide block b5, a shunting guide block c6 and a strip-shaped blocking block 7, wherein the upper machine head body is provided with a first guide groove and a second guide groove;

as a preferred embodiment of the invention, a flow channel is arranged between the upper machine head body 1 and the lower machine head body 2, and the flow channel is of a conical structure which extends outwards from the middle in a streamline shape. The flow channel is internally provided with three shunting guide blocks which are symmetrically distributed by taking the axis as the center;

as a preferred embodiment of the present invention, the shape of the diverging guide blocks a4 can be regarded as being composed of an equilateral triangle and a semicircle. The glue attack angle of the shunt guide block b5 and the shunt guide block c6 is 60 degrees, and the shunt guide block b5 and the shunt guide block c6 are symmetrically distributed.

As a preferred embodiment of the invention, the flow channel is divided into two rows from left to right, the first row is sequentially provided with two axially symmetrically distributed shunting guide block shunting guide blocks c6 and shunting guide block b5 from top to bottom, and the second row is provided with shunting guide blocks a 4;

as a preferred embodiment of the invention, one end of the transition connecting flange 3 is connected with the double-screw extruder, and the other end is connected with the machine head; the shape of the internal flow passage of the transition connecting flange 3 is in conical transition from round to rectangle.

The upper machine head body 1 and the lower machine head body 2 are connected by bolts; the machine head and the double-screw extruder adopt a flange connection mode;

the central axes of the machine head, the transition connecting flange 3 and the double-screw extruder are all positioned on the same straight line.

Further, the arc surfaces of the shunting guide block a4, the shunting guide block b5 and the shunting guide block c6 face the extrusion direction of the sizing material, namely the horizontal direction;

the invention also relates to an extrusion method of the wide film extrusion molding machine head device based on the double-screw extruder, which comprises the following steps:

1) rubber enters a flow channel from the middle of a machine head through a transition connecting flange 3 under the pressurization effect of a double-screw extruder, is forcibly shunted when passing through a shunting guide block a4, is expanded to two sides in a streamline shape, is shunted and guided again through a shunting guide block b5 and a shunting guide block c6, is further expanded to two sides, and reaches a strip-shaped blocking block 10 in advance when the rubber with relatively high speed and reaches the strip-shaped blocking block 10 successively when the rubber with relatively low speed;

2) when the height of the rubber material is consistent, the rubber material crosses the strip-shaped block 10, and finally the rubber material uniformly flows out through the die of the machine head.

The above embodiments are merely illustrative and not restrictive of the technical solutions of the present invention. Any modification or partial replacement without departing from the spirit of the present invention should be covered in the scope of the claims of the present invention.