阅读说明：本技术 一种可改变模孔形状的聚合物挤出模具装置 (Polymer extrusion die device capable of changing shape of die hole ) 是由 李冰珏 周胜民 付帝 陈云飞 于 2019-11-06 设计创作，主要内容包括：发明公开了一种可改变模孔形状的聚合物挤出模具装置由操纵杆、模具后盖、第一模孔构件、第二模孔构件、第三模孔构件和第四模孔构件组成。第一、二、三、四模孔构件之间组成铰链四连杆机构,其中第二模孔构件与模具后盖固定,操纵杆为主动件且与第一模孔构件连接。通过控制操纵杆的摆动可以带动第一、二、三、四模孔构件运动,从而改变模孔形状。该挤出模具可以生产横截面形状连续变化的塑料挤出件,减少了后续加工的生产成本。本发明在获得横截面形状变化的塑料挤出件,提高生产能力,降低加工成本上有着重要的意义。(The invention discloses a polymer extrusion die device capable of changing the shape of a die hole, which consists of an operating lever, a die rear cover, a first die hole member, a second die hole member, a third die hole member and a fourth die hole member. The first, second, third and fourth die hole components form a hinge four-bar mechanism, wherein the second die hole component is fixed with the die rear cover, and the operating lever is a driving part and is connected with the first die hole component. The first, second, third and fourth die hole components can be driven to move by controlling the swinging of the control lever, so that the shape of the die hole is changed. The extrusion die can produce plastic extrusion pieces with continuously changed cross section shapes, and reduces the production cost of subsequent processing. The invention has important significance in obtaining the plastic extruded piece with the shape of the cross section changed, improving the production capacity and reducing the processing cost.)

1. A polymer extrusion die device capable of changing the shape of a die hole is characterized in that: the mold comprises a control lever (1), a mold rear cover (2), a first die hole component (3), a second die hole component (4), a third die hole component (5) and a fourth die hole component (6); the die rear cover (2) is connected with a machine head, wherein a die hole is defined by the first, second, third and fourth die hole components (3, 4, 5 and 6), and the die rear cover (2) is provided with a through hole (2-1) matched with the die hole; the operating rod (1) and the first die hole component (3) are fixedly connected through a screw; wherein the mould rear cover (2) is provided with a special-shaped hole for the movement of the control lever (1); changing the shape of the die hole by swinging the operating rod (1) in the extrusion process;

the second die hole component (4) is fixed on the die rear cover (2) through an inner hexagon screw; one side of the first die hole component (3) is sequentially provided with a first arc-shaped protruding part (3-1), a first fan-shaped groove part (3-3) and a first arc-shaped protruding part (3-1) from bottom to bottom, and the other side of the first die hole component is sequentially provided with a first arc-shaped embedding groove (3-2), a first fan-shaped protruding part (3-4) and a first arc-shaped embedding groove (3-2) from top to bottom;

one side of the third component (5) is sequentially provided with a third arc-shaped protruding part (5-1), a third fan-shaped groove part (5-3) and a third arc-shaped protruding part (5-1) from bottom to bottom, and the other side of the third component is sequentially provided with a third arc-shaped embedding groove (5-2), a third fan-shaped protruding part (5-4) and a third arc-shaped embedding groove (5-2) from top to bottom;

one side of each of the second and fourth die hole components (4, 6) is inclined; a second arc-shaped embedding groove (4-2), a second fan-shaped bulge part (4-4) and a second arc-shaped embedding groove (4-2) are sequentially arranged on the inclined side of the second die hole component (4) from top to bottom; the other side of the second die hole component (4) is provided with a second arc-shaped extending part (4-1), a second fan-shaped groove part (4-3) and a second arc-shaped extending part (4-1) from top to bottom in sequence

A fourth arc-shaped embedding groove (6-2), a fourth fan-shaped bulge part (6-4) and a fourth arc-shaped embedding groove (6-2) are sequentially arranged on the inclined side of the fourth die hole component (6) from top to bottom; the other side of the fourth die hole component (6) is sequentially provided with a fourth arc-shaped protruding part (6-1), a fourth sector groove part (6-3) and a fourth arc-shaped protruding part (6-1) from top to bottom;

wherein each first arc-shaped protruding part (3-1) is arranged in each fourth arc-shaped embedding groove (6-2) in a sliding fit manner; each fourth arc-shaped protruding part (6-1) is arranged in the third arc-shaped embedding groove (5-2) in a sliding fit mode; each third arc-shaped protruding part (5-1) is arranged in the second arc-shaped protruding groove (4-2) in a sliding fit manner; each second arc-shaped protruding part (4-1) is arranged in the first arc-shaped embedding groove (3-2) in a sliding fit manner; the fourth fan-shaped protruding part (6-4) is matched with the first fan-shaped groove part (3-3) in a matching way; the first fan-shaped protruding part (3-4) is embedded and matched with the second fan-shaped groove part (4-3); the second fan-shaped protruding part (4-4) is embedded and matched with the third fan-shaped groove part (5-3); the third fan-shaped protruding part (5-4) is matched with the fourth fan-shaped groove part (6-3) in a matching mode.

2. The polymer extrusion die apparatus capable of changing the shape of the die orifice of claim 1, wherein: the bottom included angle of the inclined sides of the second and fourth die hole components (4 and 6)

3. The polymer extrusion die apparatus capable of changing the shape of the die orifice according to claims 1 and 2, wherein: the central angles of the first, second, third and fourth arc-shaped extending parts (3-1, 4-1, 5-1, 6-1) and the central angles of the first, second, third and fourth arc-shaped embedding grooves (3-2, 4-2, 5-2, 6-2) are both alpha, and the central angle alpha is between (90 DEG-)) And

4. The polymer extrusion die apparatus capable of changing the shape of the die orifice according to claims 1 and 2, wherein: the central angles of the first, second, third and fourth fan-shaped convex parts (3-4, 4-4, 5-4, 6-4) and the central angles of the first, second, third and fourth fan-shaped groove parts (3-3, 4-3, 5-3, 6-3) are all alpha, and the central angle alpha is between (90 DEG-)

Technical Field

The invention relates to the field of polymer extrusion dies, in particular to a polymer extrusion die device capable of changing the shape of a die hole.

Background

Currently, conventional extrusion processes use a fixed die exit to produce a continuous plastic extrudate product having a fixed cross-sectional shape. Conventional extrusion processes form a wide range of product families. However, since the conventional extrusion process cannot continuously change the cross-sectional shape of the product, the extrusion process has no flexibility to adapt to more and more complex products, and cannot meet more diverse product requirements. Among them, the deformable extrusion die is also a field of interest in the continuous extrusion molding technology. The deformable mould can produce plastic parts with continuously changed cross sections, has the capability which is not possessed by the traditional mould, has stronger production capability and lower processing cost compared with injection moulding.

Disclosure of Invention

The purpose of the invention is as follows: the invention provides a polymer extrusion die device capable of changing the shape of a die hole, which is simple and convenient to operate and can directly control the change of the shape of the die hole through an operating lever.

The technical scheme of the invention is as follows: a polymer extrusion die device capable of changing the shape of a die hole comprises a control rod, a die back cover, a first die hole member, a second die hole member, a third die hole member and a fourth die hole member; the die rear cover is connected with the machine head, wherein a die hole is defined by the first, second, third and fourth die hole components, and a through hole matched with the die hole is formed in the die rear cover; the operating rod is fixedly connected with the first die hole component through a screw; wherein the rear cover of the die is provided with a special-shaped hole for the movement of the operating lever; changing the shape of the die hole by swinging the operating rod in the extrusion process;

the second die hole component is fixed on the die rear cover through an inner hexagon screw; one side of the first die hole component is sequentially provided with a first arc-shaped protruding part, a first fan-shaped groove part and a first arc-shaped protruding part from bottom to bottom, and the other side of the first die hole component is sequentially provided with a first arc-shaped embedding groove, a first fan-shaped protruding part and a first arc-shaped embedding groove from top to bottom;

one side of the third component is sequentially provided with a third arc-shaped protruding part, a third fan-shaped groove part and a third arc-shaped protruding part from bottom to bottom, and the other side of the third component is sequentially provided with a third arc-shaped embedding groove, a third fan-shaped protruding part and a third arc-shaped embedding groove from top to bottom;

one side of each of the second die hole component and the fourth die hole component is inclined; the inclined side of the second die hole component is sequentially provided with a second arc-shaped embedding groove, a second fan-shaped bulge and a second arc-shaped embedding groove from top to bottom; a second arc-shaped protruding part, a second fan-shaped groove part and a second arc-shaped protruding part are sequentially arranged on the other side of the second die hole component from top to bottom;

a fourth arc-shaped embedding groove, a fourth sector-shaped bulge and a fourth arc-shaped embedding groove are sequentially formed in the inclined side of the fourth die hole component from top to bottom; a fourth arc-shaped protruding part, a fourth sector groove part and a fourth arc-shaped protruding part are sequentially arranged on the other side of the fourth die hole component from top to bottom;

each first arc-shaped protruding part is arranged in each fourth arc-shaped embedding groove in a sliding fit mode; each fourth arc-shaped protruding part is arranged in the third arc-shaped embedding groove in a sliding fit mode; each third arc-shaped protruding part is arranged in the second arc-shaped protruding groove in a sliding fit mode; each second arc-shaped protruding part is arranged in the first arc-shaped embedding groove in a sliding fit mode; the fourth fan-shaped protruding part is mutually embedded and matched with the first fan-shaped groove part; the first fan-shaped protruding part is matched with the second fan-shaped groove part in a matched mode; the second fan-shaped protruding part is matched with the third fan-shaped groove part in a matched mode; the third fan-shaped protruding portion is matched with the fourth fan-shaped groove portion in a matched mode.

The invention is further improved in that: the bottom included angle of the inclined side of the second and the fourth die hole components

The angle is

Is acute angle; wherein the sliding fit angle of the second arc-shaped protruding part in the first arc-shaped embedding groove is 90 DEG-

(ii) a Wherein the first arc-shaped protrusion is embedded in the fourth arc-shaped protrusionThe sliding matching angle in the groove is 90 degrees(ii) a The fourth arc-shaped protruding part (the sliding fit angle in the third arc-shaped embedding groove is 90 DEG-)

(ii) a The sliding angle of the third arc-shaped protruding part in the second arc-shaped protruding groove is 90 DEG-

。

The invention is further improved in that: the central angles of the first, second, third and fourth arc-shaped extending parts and the central angles of the first, second, third and fourth arc-shaped embedding grooves are all alpha, and the central angle alpha is between (90 DEG-)) And

the acute angle therebetween.

The invention is further improved in that: the central angles of the first, second, third and fourth fan-shaped protrusion parts and the central angles of the first, second, third and fourth fan-shaped groove parts are all alpha, and the central angle alpha is between (90 DEG-)

) And

the acute angle therebetween. The invention is further improved in that: the movement of the operating lever causes the shape of the die hole to be changed between a rectangle and a parallelogram.

The invention has the beneficial effects that:

the technical scheme provided by the invention can play a certain role in relieving the leakage problem of the molten material in the extrusion direction by matching with connection; the method has important application in the aspects of producing extruded pieces with continuously changed cross sections, meeting the production requirements of products with complex shapes, improving the production efficiency and reducing the processing cost; the hinge four-bar mechanism formed by the four die hole components can realize the continuous change of the die hole shape, thereby directly changing the shape of the cross section of a product in the extrusion forming process.

Drawings

FIG. 1 is a schematic view of a deformable mold assembly;

fig. 2 is a schematic view of the joystick (1);

FIG. 3 is a schematic view of the mold back cover (2);

fig. 4 is a perspective view of the orifice member (3);

FIG. 5 is a perspective view of the orifice member (4)

Fig. 6 is a perspective view of the orifice member (5);

fig. 7 is a perspective view of the orifice member (6);

FIG. 8 is a first view of the extreme movement position and engagement;

FIG. 9 is a second schematic view of the extreme motion position and engagement;

fig. 10 is a sectional view of the orifice member (3);

fig. 11 is a sectional view of the orifice member (4);

fig. 12 is a sectional view of the orifice member (5);

fig. 13 is a sectional view of the orifice member (6).

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1 to 9, a polymer extrusion die apparatus capable of changing a die orifice shape includes a lever 1, a die back cover 2, a first die orifice member 3, a second die orifice member 4, a third die orifice member 5, and a fourth die orifice member 6; the die rear cover 2 is connected with a machine head, wherein a die hole is defined by first, second, third and fourth die hole components 3, 4, 5 and 6, and the die rear cover 2 is provided with a through hole 2-1 matched with the die hole; the operating rod 1 and the first die hole component 3 are fixedly connected through a screw; wherein the mould rear cover 2 is provided with a special-shaped hole for the movement of the control lever 1; the shape of the die hole is changed by swinging the operating rod 1 in the extrusion process;

the second die hole component 4 is fixed on the die rear cover 2 through an inner hexagon screw; one side of the first die hole component 3 is provided with a first arc-shaped protruding part 3-1, a first fan-shaped groove part 3-3 and a first arc-shaped protruding part 3-1 from bottom to bottom in sequence, and the other side of the first die hole component is provided with a first arc-shaped embedding groove 3-2, a first fan-shaped protruding part 3-4 and a first arc-shaped embedding groove 3-2 from top to bottom in sequence;

one side of the third component 5 is sequentially provided with a third arc-shaped protruding part 5-1, a third fan-shaped groove part 5-3 and a third arc-shaped protruding part 5-1 from bottom to bottom, and the other side is sequentially provided with a third arc-shaped embedding groove 5-2, a third fan-shaped protruding part 5-4 and a third arc-shaped embedding groove 5-2 from top to bottom;

one side of each of the second and fourth die hole components 4 and 6 is inclined; a second arc-shaped embedding groove 4-2, a second fan-shaped bulge 4-4 and a second arc-shaped embedding groove 4-2 are sequentially arranged on the inclined side of the second die hole component 4 from top to bottom; the other side of the second die hole component 4 is provided with a second arc-shaped protruding part 4-1, a second fan-shaped groove part 4-3 and a second arc-shaped protruding part 4-1 from top to bottom in sequence;

a fourth arc-shaped embedding groove 6-2, a fourth fan-shaped bulge 6-4 and a fourth arc-shaped embedding groove 6-2 are sequentially arranged on the inclined side of the fourth die hole component 6 from top to bottom; a fourth arc-shaped protruding part 6-1, a fourth sector groove part 6-3 and a fourth arc-shaped protruding part 6-1 are sequentially arranged on the other side of the fourth die orifice member 6 from top to bottom;

each first arc-shaped protruding part 3-1 is arranged in each fourth arc-shaped embedding groove 6-2 in a sliding fit mode; each fourth arc-shaped protruding part 6-1 is arranged in the third arc-shaped embedding groove 5-2 in a sliding fit mode; each third arc-shaped protruding part 5-1 is arranged in the second arc-shaped protruding groove 4-2 in a sliding fit manner; each second arc-shaped protruding part 4-1 is arranged in the first arc-shaped embedding groove 3-2 in a sliding fit mode; the first fan-shaped protruding part 3-4 is matched with the second fan-shaped groove part 4-3 in a matched mode; the second fan-shaped protruding part 4-4 is embedded and matched with the third fan-shaped groove part 5-3; the third fan-shaped protruding part 5-4 is embedded and matched with the fourth fan-shaped groove part 6-3; the fourth fan-shaped convex part 6-4 is mutually embedded and matched with the first fan-shaped groove part 3-3.

The bottom included angle of the inclined side of the second and fourth die hole components 4 and 6 is

Is 60 degrees; wherein the sliding fit angle of the second arc-shaped protrusion 4-1 in the first arc-shaped embedding groove 3-2 is 30 degrees; wherein the sliding fit angle of the first arc-shaped protrusion 3-1 in the fourth arc-shaped embedding groove 6-2 is 30 degrees; the sliding fit angle of the fourth arc-shaped protruding part 6-1 in the third arc-shaped embedding groove 5-2 is 30 degrees; the sliding angle of the third arc-shaped protrusion part 5-1 in the second arc-shaped protrusion groove 4-2 is 30 degrees.

The central angles of the first, second, third and fourth arc-shaped protruding parts 3-1, 4-1, 5-1 and 6-1, the central angles of the first, second, third and fourth arc-shaped embedding grooves 3-2, 4-2, 5-2 and 6-2, the central angles of the first, second, third and fourth sector-shaped protruding parts and the central angles of the first, second, third and fourth sector-shaped groove parts are all alpha, and the central angle alpha is 45 degrees.

As shown in fig. 4-7 and 10-13, when the lever 1 is rotated, the first orifice member 3 drives the fourth orifice member 6 to rotate, and the fourth orifice member 6 drives the third orifice member 5 to rotate;

as shown in fig. 8 and 9, the first, second, third and fourth orifice members 3, 4, 5 and 6 are rotated from the initial limit position to the final limit position, and the orifice shape may be changed between a rectangle and a parallelogram.

In the process, the die hole is continuously changed in shape, and the molten polymer passing through the die hole is processed into a product with continuously changed cross-sectional shape. The power source drives the operating rod 1 to oscillate back and forth as the molten polymer passes through the die orifice. The rear cover 2 of the die is connected with the machine head, and the rear cover of the die hole is provided with a special-shaped hole for the movement of the control lever 1; the bottom surface of the rear cover 2 of the mold is provided with a through hole 2-1 for the processed plastic part to pass through, and the shape of the through hole is determined according to the movement range of the mold hole components 3, 4, 5 and 6.