CN211683404U

CN211683404U - Thermoplastic material filter screen baffle and extrusion device

Info

Publication number: CN211683404U
Application number: CN201922427038.8U
Authority: CN
Inventors: 楼辉义
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-10-16
Anticipated expiration: 2029-12-27

Abstract

The utility model discloses a thermoplastic material filter screen baffle, including filtering the main part, be equipped with a plurality of filtration holes that link up around being in the filtration main part, the one end of crossing the filtration hole and being close to the export is and enlarges the structure gradually, makes adjacent two it is closed angle structure to cross next door end between the export of filtration hole. The utility model discloses the material after the thermoplastic material filter screen baffle can avoid the part to filter stops in the dead angle department of export and causes the overheated yellowing of extrusion material, the coking and the condition of producing new solid particle or impurity, improves the quality and the yield of moulding plastics and extruding the product. In addition, the utility model discloses still disclose an extrusion device.

Description

Thermoplastic material filter screen baffle and extrusion device

Technical Field

The utility model relates to an extrusion device especially relates to a thermoplastic material filter screen baffle and extrusion device thereof.

Background

The existing plastic extruder generally needs to filter before extruding the molten plastic, so that impurities, sand grains or particles mixed in the molten plastic are removed, the extruded plastic is pure and uniform in color, and the quality of the product is improved. The existing filtering mode usually adopts a filter screen, a filtering baffle 200 is arranged behind the filter screen, a plurality of honeycomb-shaped through holes 201 are formed in the filtering baffle 200, and the molten plastic reaches the extrusion nozzle through the through holes 201 after being filtered by the filter screen. Although the filter screen can effectively remove various impurities, sand grains or particulate matters, because a certain partition wall 202 exists between the through hole 201 and the through hole 201 of the prior filter baffle, as shown in fig. 1, the partition wall 202 forms a plane 203 at one end of an outlet, the plane is a dead angle position 204, and no matter how high the extrusion pressure is, the molten material at the dead angle position 204 has no flowability and is adhered to the baffle, so that the molten material is difficult to extrude to the extrusion nozzle. After the molten materials exist in the dead angle position for a long time, overheating yellowing and coking are slowly generated, so that the physicochemical properties of the raw materials are damaged, and new solidified particles 300 or impurities are formed, and the solidified particles 300 or the impurities are in yellow-black crystal points. The particles are not carried along by the flowing material when they solidify or char to a certain volume and are extruded with the flowing material to the nozzle. However, when these particles are extruded and molded into a product, the surface of the product has a grainy feel, uniformity and color inconsistent with surrounding materials, especially in the case of a transparent material, which greatly affects the quality of the product, causes product failure, and reduces the yield of the product.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an avoid the material after the part filtration to stop in the dead angle department of export and cause the overheated yellowing of extrusion material, the coking and produce the condition of new solid particle or impurity, improve the thermoplastic material filter screen baffle of the quality and the yield of moulding plastics and extruding products.

Another object of the utility model is to provide an avoid the material after the partial filtration to stop in the export dead angle department of filtering baffle and cause the overheated yellow of extrusion material, the coking and produce the condition of new solid particle or impurity, improve the quality of moulding plastics and extruding products and the extrusion device of yield.

In order to realize the above purpose, the utility model provides a thermoplastic material filter screen baffle is including filtering the main part, it is equipped with a plurality of filtration holes that link up around being to filter in the main part, the one end of filtering the hole and being close to the export is and enlarges the structure gradually, makes adjacent two it is the closed angle structure to filter next door end between the export of hole.

Compared with the prior art, because the utility model discloses a filter the hole and be near the one end of export and enlarge the structure gradually, make adjacent two filter next door end between the export of hole and be the closed angle structure, consequently, can prevent that next door department between the export of adjacent two filter holes from appearing the dead angle to avoid the fused material to gather here and take place solidification and coking and form new solid particle or impurity, therefore, the utility model discloses the material of extruding has not only not had impurity, also has not granular sensation, and state and colour are very even, and specially adapted transparent material improves the quality of moulding plastics and extruding the product widely, makes the quality of product obtain very big promotion.

Preferably, the aperture of the end of the filter hole close to the inlet is kept constant.

Preferably, the filter hole is of a gradually enlarged structure from an inlet end to an outlet end thereof.

Preferably, one end of the filter hole close to the outlet is of a trumpet-shaped structure.

Preferably, the edge of the inlet of the filter hole is provided with a chamfer.

Preferably, a notch is formed between two outermost adjacent filter holes and near the edge of the filter body to cut off a plane formed between the two outermost adjacent filter holes at the outlet side.

A thermoplastic material extrusion device comprises an extrusion nozzle, a screw rod, a screw barrel, a feeding mechanism, a motor, a heating device, a filter screen and a filter screen baffle, wherein the screw rod is arranged in the screw barrel, the extrusion nozzle is arranged at one end of the screw barrel, the filter screen baffle is arranged at one end of the screw barrel close to the extrusion nozzle, the filter screen is arranged at one side of an inlet of the filter screen baffle, the feeding mechanism is arranged at the other end of the screw barrel, and the heating device is arranged outside the screw barrel and heats materials in the screw barrel; the output end of the motor is connected with the screw rod to drive the screw rod to rotate so as to extrude the material in a molten state.

Preferably, the screw rod type motor is characterized by further comprising a reduction gearbox, wherein the input end of the reduction gearbox is connected with the output end of the motor, and the output end of the reduction gearbox is connected with the screw rod.

Drawings

Fig. 1 is a state view of a conventional filtering baffle in filtering a molten material.

Fig. 2 is a structural view of the thermoplastic material extrusion apparatus of the present invention.

Fig. 3 is a structural diagram of an outlet side of a baffle of a filter screen according to a first embodiment of the present invention.

Fig. 4 is a structural diagram of an inlet side of a baffle of a filter screen according to a first embodiment of the present invention.

Fig. 5 is a cross-sectional view of a filter screen baffle according to a first embodiment of the present invention.

Fig. 6 is a cross-sectional view of a filter screen baffle according to a second embodiment of the present invention.

Fig. 7 is a cross-sectional view of a filter screen baffle according to a third embodiment of the present invention.

Fig. 8 is a cross-sectional view of a filter screen baffle according to a fourth embodiment of the present invention.

Fig. 9 is a cross-sectional view of a filter screen baffle according to a fifth embodiment of the present invention.

Detailed Description

In order to explain technical contents, structural features, and effects achieved by the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

As shown in fig. 2 to 5, the thermoplastic material extrusion device 100 of the present invention includes an extrusion nozzle 1, a screw rod 2, a screw barrel 3, a feeding mechanism 4, a motor 5, a heating device 6, a filter screen 7, a filter screen baffle 8 and a reduction gearbox, wherein the screw rod 2 is arranged in the screw barrel 3, the extrusion nozzle 1 is arranged at one end of the screw barrel 3, the filter screen baffle 8 is arranged at one end of the screw barrel 3 close to the extrusion nozzle 1, the filter screen 7 is arranged at one side of an inlet 82a of the filter screen baffle 8, the feeding mechanism 4 is arranged at the other end of the screw barrel 3, and the heating device 6 is arranged outside the screw barrel 3 and heats the material in the screw barrel 3; the output end of the motor 5 is connected with the input end of the reduction gearbox 9, and the output end of the reduction gearbox 9 is connected with the screw rod 2 so as to drive the screw rod 2 to rotate and extrude the material in a molten state.

As shown in fig. 3 and 5, the filtering net baffle 8 includes a filtering main body 81, the filtering main body 81 is provided with a plurality of filtering holes 82 which are through in the front-back direction, one end of each filtering hole 82 close to the outlet 82b is gradually enlarged, and the tail end of a partition wall 83 between the outlets 82b of two adjacent filtering holes 82 is in a sharp-angled structure 84. The diameter of the filter hole 82 at the end near the inlet 82a is constant and cylindrical, and the diameter of the filter hole 82 at the end near the inlet 82a is gradually enlarged and tapered.

As shown in fig. 4 and 5, the edge of the inlet 82a of the filter hole 82 is provided with a chamfer 82 c. The chamfer 82c may allow the material in a molten state to more easily enter the filter holes 82, thereby allowing the material to be extruded more smoothly.

As shown in fig. 3, a notch 81a is formed at an edge of the filter body 81, which is located between two outermost adjacent filter holes 82, and the notch 81a is formed in a circular arc shape to cut off a plane formed between the two outermost adjacent filter holes 82 on the outlet side. This prevents the molten material from accumulating on the periphery and solidifying and coking to form new solid particles or impurities. Further, a surface between the outermost filter hole 82 and the outermost edge of the filter body 81 is a mounting surface 81b, and the molten material does not reach the mounting surface 81b during filtration.

Compared with the prior art, because the utility model discloses a filter 82 and be the structure of enlarging gradually near the one end of export 82b, make adjacent two filter 82's export 82b between next door 83 end be closed angle structure 84, consequently, can prevent that adjacent two from filtering the next door 83 department between 82b of export 82 of hole 82 and appearing the dead angle to avoid the fused material here and take place solidification and coking and form new solid particle or impurity, therefore, the utility model discloses the material of extruding has not had impurity yet, also has not the granular sensation, and state and colour are very even, and specially adapted transparent material improves injection moulding product and the quality of extruding widely, makes the quality of product obtain very big promotion. Through the utility model discloses the product of production, quality purity reach domestic and international leading level, have solved a world difficult problem of thermoplastic materials such as plastics, glass, especially transparent material trade.

As shown in fig. 6, the second embodiment of the present invention is shown in the figure, and the difference between the first embodiment and the second embodiment lies in the structure of the filtering hole 85, the end of the filtering hole 85 of the present embodiment close to the outlet 85b is in a horn-shaped structure, the surface of the horn-shaped structure is an arc surface sunken to the outside of the filtering hole 85, so that the end of the partition wall 83 between the outlets 85b of the filtering hole 85 is in a sharp angle structure 86. The function of this embodiment is the same as that of the first embodiment, and the description will not be repeated here.

As shown in fig. 7, a third embodiment of the present invention is shown, and the structure of the filtering hole 85 in this embodiment is substantially the same as that of the filtering hole 85 in the second embodiment, and the difference is that the surface of the trumpet-shaped structure at the end of the filtering hole 85 close to the outlet 85b in this embodiment is an arc surface recessed towards the inner side of the filtering hole 85, and the end of the partition wall 83 between the outlets 85b of two adjacent filtering holes 85 can also be made to be a sharp-angled structure 86. The function of this embodiment is the same as that of the first embodiment, and the description will not be repeated here.

As shown in fig. 8, a fourth embodiment of the present invention is shown, and the difference between this embodiment and the first embodiment lies in the structure of the filtering hole 87, the filtering hole 87 of this embodiment is gradually enlarged from the inlet 87a end to the outlet 87b end, so that the end of the partition wall 83 between the outlets 87b of two adjacent filtering holes 87 is a sharp-angled structure 88. The function of this embodiment is the same as that of the first embodiment, and the description will not be repeated here.

As shown in fig. 9, a fifth embodiment of the present invention is shown, the structure of the fourth filtering hole 85 in this embodiment is substantially the same as that of the fourth filtering hole in this embodiment, and the difference is that the inner wall of the filtering hole 87 in this embodiment is an arc surface recessed toward the inner side of the filtering hole 87.

In addition, the cross section of the filtering hole of the utility model is not limited to be circular, but also can be square, triangle, ellipse and other geometric shapes.

The structural principles of the extrusion nozzle 1, the feeding mechanism 4 and the heating device 6 related to the thermoplastic material extrusion apparatus 100 of the present invention are well known to those skilled in the art, and will not be described in detail herein.

The above disclosure is only a preferred embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereto, and therefore, the scope of the present invention is not limited to the above embodiments.

Claims

1. The utility model provides a thermoplastic material filter screen baffle which characterized in that: including filtering the main part, be equipped with a plurality of filtration holes that link up around being on filtering the main part, the one end that filters the hole and be close to the export is the structure that enlarges gradually, makes adjacent two the terminal closed angle structure that is of next door between the export of filtration hole.

2. The thermoplastic screen baffle of claim 1, wherein: the aperture of one end of the filter hole close to the inlet is kept unchanged.

3. The thermoplastic screen baffle of claim 1, wherein: the filtering holes are of gradually enlarged structures from the inlet end to the outlet end.

4. The thermoplastic screen baffle of claim 1, wherein: one end of the filtering hole close to the outlet is of a trumpet-shaped structure.

5. The thermoplastic screen baffle of claim 1, wherein: and the edge of the inlet of the filter hole is provided with a chamfer.

6. The thermoplastic screen baffle of claim 1, wherein: and a notch is arranged between two adjacent filtering holes at the outermost side and close to the edge of the filtering main body.

7. A thermoplastic extrusion device, characterized by: the screw extruder comprises an extrusion nozzle, a screw barrel, a feeding mechanism, a motor, a heating device, a filter screen and the filter screen baffle plate as claimed in any one of claims 1 to 6, wherein the screw is arranged in the screw barrel, the extrusion nozzle is arranged at one end of the screw barrel, the filter screen baffle plate is arranged at one end of the screw barrel close to the extrusion nozzle, the filter screen is arranged at one side of an inlet of the filter screen baffle plate, the feeding mechanism is arranged at the other end of the screw barrel, and the heating device is arranged outside the screw barrel and heats materials in the screw barrel; the output end of the motor is connected with the screw rod to drive the screw rod to rotate so as to extrude the material in a molten state.

8. Thermoplastic extrusion apparatus according to claim 7, wherein: the screw rod is connected with the input end of the screw rod, the input end of the screw rod is connected with the output end of the motor, and the output end of the screw rod is connected with the input end of the reduction gearbox.