阅读说明：本技术 分段式挤出螺杆的连接结构 (Connection structure of screw is extruded to sectional type ) 是由 闵华 江小辉 魏国亮 戴会斌 章忠飞 陈祖明 于 2021-01-13 设计创作，主要内容包括：本发明公开了一种分段式挤出螺杆的连接结构,本结构的左段螺杆左端设有外花键、右端设有第一沉孔,第一沉孔内壁设有内螺纹以及销孔,中段螺杆左端为设有外螺纹的第一缩颈段并且垂直轴线设有销孔,中段螺杆左端的第一缩颈段拧入左段螺杆右端的第一沉孔,第一销轴插入第一沉孔和第一缩颈段的销孔,中段螺杆右端设有第二沉孔,第二沉孔内壁设有内螺纹以及销孔,右段螺杆左端为设有外螺纹的第二缩颈段并且垂直轴线设有销孔,右段螺杆左端的第二缩颈段拧入中段螺杆右端的第二沉孔,第二销轴插入第二沉孔的销孔和第二缩颈段的销孔,右段螺杆右端为出料口并连接出料口模具。本结构分段处拆卸简易,方便实现磨损段的更换,有效降低挤出螺杆的制造成本。(The invention discloses a connecting structure of a sectional type extrusion screw rod, the left end of a left section screw rod of the structure is provided with an external spline, the right-hand member is equipped with first counter bore, first counter bore inner wall is equipped with internal thread and pinhole, middle section screw rod left end is equipped with the pinhole for the first necking down section that is equipped with the external screw thread and vertical axis, the first counter bore of left section screw rod right-hand member is twisted to the first necking down section of middle section screw rod left end, first round pin axle inserts the pinhole of first counter bore and first necking down section, middle section screw rod right-hand member is equipped with the second counter bore, second counter bore inner wall is equipped with internal thread and pinhole, the second necking down section and the vertical axis of right side section screw rod left end for being equipped with the external screw thread are equipped with the pinhole, the second counter bore of middle section screw rod right-hand member is twisted to the second necking down section of right side section screw rod left end, the pinhole that the second round pin axle inserted the second counter. The structure has the advantages that the disassembly of the subsection part is simple, the replacement of the abrasion section is conveniently realized, and the manufacturing cost of the extrusion screw is effectively reduced.)

1. The utility model provides a connection structure of screw is extruded to sectional type, includes left section screw rod, middle section screw rod and right side section screw rod, its characterized in that: the left end of the left section screw is provided with an external spline for connecting with a driving motor, the right end of the left section screw is provided with a first counter bore, the inner wall of the first counter bore is provided with an internal thread and a pin hole is arranged through the vertical axis of the first counter bore, the left end of the middle section screw is a first necking section, the outer ring of the first necking section is provided with an external thread and the vertical axis is provided with a pin hole, the first necking section at the left end of the middle section screw is screwed into the first counter bore at the right end of the left section screw, the first pin shaft is inserted into the pin hole of the first counter bore and the pin hole of the first necking section, the right end of the middle section screw is provided with a second counter bore, the inner wall of the second counter bore is provided with an internal thread and a pin hole is arranged through the vertical axis of the second counter bore, the left end of the right section screw is a second necking section, and a second necking section at the left end of the right section screw rod is screwed into a second counter bore at the right end of the middle section screw rod, a second pin shaft is inserted into a pin hole of the second counter bore and a pin hole of the second necking section, and the right end of the right section screw rod is a discharge port and is connected with a discharge port die.

2. The connecting structure of a segmented extrusion screw according to claim 1, characterized in that: and a first guide inclined plane is arranged at the inlet of the first counter bore at the right end of the left section screw rod.

3. The connecting structure of a segmented extrusion screw according to claim 1, characterized in that: and a second guide inclined plane is arranged at the inlet of the second counter bore at the right end of the middle section screw rod.

4. A connection structure of a segmented extrusion screw according to claim 1, 2 or 3, characterized in that: the cross sections of the first pin shaft and the second pin shaft are rectangular cross sections.

Technical Field

The invention relates to the technical field of mechanical equipment, in particular to a connecting structure of a sectional type extrusion screw rod.

Background

The extrusion screw is used as a tool for homogenizing components of materials in a molten state, and has the characteristics of high working reliability, strong self-lubricating capability and less residual materials, and the performance of the extrusion screw mainly depends on the working state of the extrusion screw and the performance of the structure. The extrusion screw has excellent productivity and mixing property, and can be used for modifying engineering plastics, so the extrusion screw is favored by the majority of users, and the development of a novel extrusion screw is promoted to meet the requirements of high-quality and high-performance engineering plastic products.

In the working process of the extrusion screw, the abrasion between the screw and the machine barrel is inevitable, and the manufacturing cost of the screw is high, and once the screw is locally and seriously abraded, the whole screw system needs to be replaced after the production can not meet the requirement, so that the use cost of the screw and the production cost of a product are increased.

In the case of the existing extrusion screws, the solution to the screw wear is usually to enhance the surface hardness and improve the wear resistance. The disadvantage of this method is that the surface strengthening treatment is expensive, and the dimension of the screw is changed after the surface strengthening treatment, thereby affecting the fit relationship between the screw and the barrel.

In view of the above disadvantages, a segmented extrusion screw with an easily replaceable wear segment is particularly needed to reduce the manufacturing cost of the screw and improve the production efficiency.

Disclosure of Invention

The invention aims to solve the technical problem of providing a connection structure of a sectional type extrusion screw, which overcomes the defect of surface strengthening treatment of the traditional extrusion screw, not only can meet the requirement of a high-pressure conveying environment provided by the traditional extrusion screw, but also is simple and easy to disassemble at the sectional position, is convenient to replace a wear section, and effectively reduces the manufacturing cost of the extrusion screw.

In order to solve the technical problem, the connecting structure of the sectional type extrusion screw rod comprises a left section screw rod, a middle section screw rod, a right section screw rod, a first pin shaft and a second pin shaft, wherein the left end of the left section screw rod is provided with an external spline for connecting with a driving motor, the right end of the left section screw rod is provided with a first counter bore, the inner wall of the first counter bore is provided with an internal thread and is provided with a pin hole penetrating through the vertical axis of the first counter bore, the left end of the middle section screw rod is a first necking section, the outer ring of the first necking section is provided with an external thread and is provided with a pin hole along the vertical axis, the first necking section at the left end of the middle section screw rod is screwed into the first counter bore at the right end of the left section screw rod, the first pin shaft is inserted into the pin hole of the first counter bore and the pin hole of the first necking section, the, the left end of the right section screw is a second necking section, an external thread is arranged on the outer ring of the second necking section, a pin hole is formed in the vertical axis, the second necking section at the left end of the right section screw is screwed into the second counter bore at the right end of the middle section screw, a second pin shaft is inserted into the pin hole of the second counter bore and the pin hole of the second necking section, and the right end of the right section screw is a discharge hole and is connected with a discharge hole die.

Furthermore, a first guiding inclined plane is arranged at the inlet of a first counter bore at the right end of the left section of screw rod.

Furthermore, a second guiding inclined plane is arranged at the inlet of a second counter bore at the right end of the middle section screw rod.

Further, the cross sections of the first pin shaft and the second pin shaft are rectangular cross sections.

Because the connecting structure of the sectional type extrusion screw rod adopts the technical scheme, namely, the left end of the left section screw rod of the connecting structure is provided with an external spline for connecting with a driving motor, the right end of the left section screw rod is provided with a first counter bore, the inner wall of the first counter bore is provided with an internal thread and is provided with a pin hole through the vertical axis of the first counter bore, the left end of the middle section screw rod is provided with a first necking section provided with an external thread and is provided with a pin hole through the vertical axis, the first necking section at the left end of the middle section screw rod is screwed into the first counter bore at the right end of the left section screw rod, a first pin shaft is inserted into the pin hole of the first counter bore and the pin hole of the first necking section, the right end of the middle section screw rod is provided with a second counter bore, the inner wall of the second counter bore is provided with an internal thread and is provided with a pin, the second pin shaft is inserted into the pin hole of the second counter bore and the pin hole of the second necking section, and the right end of the right section screw rod is provided with a discharge port and connected with a discharge port die. The defect of traditional screw rod surface strengthening treatment is overcome to this structure, not only can satisfy the high pressure transport environment that present screw rod needs to be provided of extruding, and segmentation department dismantles simply moreover, conveniently realizes the change of wearing and tearing section, effectively reduces the manufacturing cost who extrudes the screw rod.

Drawings

The invention is described in further detail below with reference to the following figures and embodiments:

FIG. 1 is a schematic view of a connection structure of a sectional type extrusion screw according to the present invention;

FIG. 2 is a schematic cross-sectional view of a left section screw of the present connection structure;

FIG. 3 is a view taken along line A-A of FIG. 2;

FIG. 4 is a view from the B-B direction of FIG. 2;

FIG. 5 is a cross-sectional view of a middle screw rod of the connection structure;

FIG. 6 is a view from the C-C direction of FIG. 5;

FIG. 7 is a view from direction D-D of FIG. 5;

FIG. 8 is a schematic cross-sectional view of the right section of the screw in the present connection structure;

fig. 9 is a view from direction E-E of fig. 8.

Detailed Description

For example, as shown in fig. 1 to 9, the connecting structure of the sectional type extrusion screw of the present invention includes a left section screw 1, a middle section screw 2, a right section screw 3, a first pin 4 and a second pin 5, the left end of the left section screw 1 is provided with an external spline 11 for connecting with a driving motor 6, the right end is provided with a first counter bore 12, the inner wall of the first counter bore 12 is provided with an internal thread 13 and a pin hole 14 is provided along the vertical axis of the first counter bore 12, the left end of the middle section screw 2 is a first necking section 21, the outer ring of the first necking section 21 is provided with an external thread 22 and a pin hole 23 is provided along the vertical axis, the first necking section 21 at the left end of the middle section screw 2 is screwed into the first counter bore 12 at the right end of the left section screw 1, the first pin 4 is inserted into the pin hole 14 of the first counter bore 12 and the pin hole 23 of the first necking section 21, the right end of, the inner wall of the second counterbore 24 is provided with internal threads 25, a pin hole 26 is arranged on a vertical axis penetrating through the second counterbore 24, the left end of the right section screw rod 3 is a second necking section 31, an external thread 32 is arranged on the outer ring of the second necking section 31, a pin hole 33 is arranged on the vertical axis, the second necking section 31 at the left end of the right section screw rod 3 is screwed into the second counterbore 24 at the right end of the middle section screw rod 2, the second pin shaft 5 is inserted into the pin hole 26 of the second counterbore 24 and the pin hole 33 of the second necking section 31, and the right end of the right section screw rod 3 is a discharge hole 34 and is connected with a discharge hole mold.

Preferably, a first guiding inclined plane 15 is arranged at the inlet of the first counter bore 12 at the right end of the left section screw 1.

Preferably, the inlet of the second counter bore 24 at the right end of the middle section screw 2 is provided with a second guide inclined surface 27.

Preferably, the cross sections of the first pin 4 and the second pin 5 are rectangular cross sections.

The external spline 11 of the left section screw rod 1 in the connecting structure and the speed reducer of the driving motor 6 form an intermeshing relationship, when the driving motor 6 works, the torque can be transmitted to the whole extrusion screw rod, and therefore the material is conveyed into the discharge hole die 7. Under the axial guiding action of the first guiding inclined plane 15, the external thread 22 at the left end of the middle section screw rod 2 can smoothly form a mutually meshed threaded connection mode with the internal thread 13 at the right end of the left section screw rod. After the meshing process is finished, the pin hole 14 of the left section screw rod and the pin hole 23 of the middle section screw rod are matched, and then the first pin shaft 4 is inserted into the pin holes 14 and 23, so that the left section screw rod 1 and the middle section screw rod 2 are prevented from falling off. Similar to the connection mode of the left section screw 1 and the middle section screw 2, under the axial guiding action of the second guiding inclined plane 27, the external thread 32 at the right end of the right section screw 3 can smoothly form a mutually meshed threaded connection mode with the internal thread 25 at the right end of the middle section screw 2; after the meshing process is completed, the pin hole 26 of the middle section screw rod 2 and the pin hole 33 of the right section screw rod 3 are matched, and then the second pin shaft 5 is inserted into the pin holes 26 and 33, so that the function of preventing the middle section screw rod 2 and the right section screw rod 3 from falling off is achieved. Finally, the discharge port 34 of the right section screw 3 and the discharge port mold 7 form a matching mode, and simultaneously, the right end of the whole screw is supported.

The connecting structure is connected between the sections of the screws through the thread fit of the internal thread and the external thread and the axial pin shaft, so that the strength of the connecting part can be ensured, a plurality of steps during disassembly and replacement can be reduced, and the labor cost and the time cost are reduced; when a certain section of screw rod is locally seriously worn, the worn section of screw rod is only needed to be disassembled and replaced, and the manufacturing cost of the screw rod is greatly reduced. The sectional type connecting extrusion screw capable of reducing the use cost is provided, the high-pressure conveying environment required to be provided by the existing extrusion screw can be met, the sectional position is easy to disassemble and convenient to replace, the sectional mode of the extrusion screw is not influenced by the appearance of the extrusion screw, and the manufacturing cost and the production cost of the extrusion screw are effectively reduced.