Hopper seat and extruder comprising same

Abstract

The hopper seat comprises a hopper seat body, a lining connected to the inner wall of the hopper seat body in a sleeving mode and a screw rod arranged in an inner cavity of the lining in a penetrating mode, and the screw rod comprises a screw rod body and a screw edge spirally arranged on the screw rod body in a protruding mode. The spiral groove is formed in the inner wall of the lining, the spiral angle of the spiral groove and the spiral angle of the screw flight are complementary, in the actual working process of the extruder, material extrusion operation is conducted through rotation of the screw, materials can be blocked by the spiral groove, then the conveying direction of the materials is changed, material bridging is effectively improved, and the conveying capacity is improved. Therefore, the efficient feeding effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic machinery, and in particular relates to a hopper seat and an extruder comprising the same. Background Art

[0002] Plastic extrusion processing, as the most widely used processing method in plastic product processing, plays an important role in the processing of sheets, plates, films, wires and cables, profiles and other products. It also plays a core role in the molding processes such as injection molding, mixing and granulation, and hollow molding. The extrusion processing performance is directly related to the quality of the product, the energy consumption of the production project, and the level of production efficiency. The development of extrusion processing technology is directly related to the development of the plastic processing industry, and it is also the focus and hot spot of the development of the plastic processing industry. Plastic processing is developing in the direction of extreme, precision, and high speed, and plastic extrusion technology and related extruders are no exception.

[0003] Improving the conveying capacity and extrusion efficiency of the extruder has always been a goal that the plastic processing field continues to pursue.

[0004] Therefore, it is necessary to design a hopper seat and an extruder including the hopper seat to improve the conveying capacity of the extruder. Utility Model Content

[0005] In view of some or all of the above technical problems existing in the prior art, the utility model proposes a hopper seat and an extruder including the same. A bushing is arranged inside the hopper seat, and a spiral groove is arranged on the bushing. When the screw rotates to push the material, the resistance produced by the spiral groove acts on the material, effectively improving the material bridging and improving the conveying capacity of the solid conveying section, thereby achieving the effect of efficient feeding.

[0006] According to one aspect of the utility model, a bucket seat is provided, including a bucket seat body, a bushing sleeved on the inner wall of the bucket seat body, and a screw inserted into the inner cavity of the bushing, wherein the screw includes a screw body and a spiral ridge protruding from the screw body, and a spiral groove is provided on the inner wall of the bushing, and the spiral angle of the spiral groove is complementary to the spiral angle of the spiral ridge.

[0007] In one embodiment, a plurality of the spiral grooves are provided on the inner wall of the bushing, and at an axial end surface of the bushing, the spiral grooves are evenly distributed in the circumferential direction of the bushing.

[0008] In one embodiment, four spiral grooves are provided on the inner wall of the bushing.

[0009] In one embodiment, in a radial cross section of the bushing, the ratio of the groove width of the spiral groove to the circumference of the inner wall of the bushing is 1 / 3 to 2 / 3.

[0010] In one embodiment, the groove depth of the spiral groove gradually decreases in the direction from the feeding end to the discharging end of the bushing.

[0011] In one embodiment, the cross-sectional shape of the spiral groove is semicircular or rectangular.

[0012] According to another aspect of the utility model, an extruder is provided, comprising the above-mentioned hopper seat.

[0013] In one embodiment, it further includes:

[0014] A barrel is connected to the discharge end of the hopper seat body.

[0015] A bushing pressure ring is sleeved in the inner cavity of the feeding end of the hopper seat body,

[0016] Wherein, the axial ends of the bushing are respectively abutted against the barrel and the bushing pressure ring, and the screw extends into the barrel.

[0017] In one embodiment, a gasket is selectively provided between the abutting surface of the hopper seat body and the barrel.

[0018] In one embodiment, a mounting groove is provided on the abutting surface between the hopper seat body and the barrel, a heat insulation layer is embedded in the mounting groove, and the gasket is located radially outside the heat insulation layer.

[0019] Compared with the prior art, the utility model has the advantages that during the actual working process of the extruder, the extrusion operation is performed through the rotation of the screw, the plastic material will be blocked by the spiral groove, and then the conveying direction of the material will be changed, the material bridging is effectively improved, and the conveying capacity is improved, thereby achieving the effect of efficient feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0021] Figure 1 An axial cross-sectional view of an extruder according to an embodiment of the present invention is shown;

[0022] Figure 2 An axial end view of a bushing of an extruder according to an embodiment of the utility model is shown.

[0023] In the drawings, the same reference numerals are used for the same components, but the drawings are not drawn to scale. DETAILED DESCRIPTION

[0024] In order to make the technical solutions and advantages of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all embodiments. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.

[0025] The utility model provides a hopper seat and an extruder including the hopper seat. Figure 1 and 2 As shown, the bucket seat 1 includes a bucket seat body 11, a bushing 2 and a screw 3. Among them, the bucket seat body 11 is a part of the extruder, and its main body is generally a cylindrical structure, which mainly plays the role of basic support and receiving materials. The bushing 2 itself is also a cylindrical structure, which is sleeved on the inner wall of the bucket seat body 11, mainly used to protect the inner wall of the bucket seat body 11, reduce the wear of the bucket seat body 11, and has the function of reducing vibration and noise and anti-corrosion. The screw 3 is inserted into the inner cavity of the bushing 2. Structurally, the screw 3 includes a screw body 31 and a screw rib 32. The screw body 31 is a rod, and the screw rib 32 is protruding on the outer wall of the screw body 31 and extends in a spiral shape. During the operation of the extruder, the screw 3 rotates around its own axis and then pushes the material in the bushing 2. According to the present application, a spiral groove 21 is provided on the inner wall of the bushing 2. The helical angle of the spiral groove 21 is complementary to the helical angle of the screw rib 32. In other words, in Figure 1 In the axial cross section of the hopper seat body 11, the extension direction of the spiral groove 21 is perpendicular to the extension direction of the screw ridge 32. During the operation of the extruder, the material enters the bushing 2, and the screw 3 rotates around its own axial direction, thereby pushing the material forward for feeding. Since the spiral groove 21 is provided on the inner wall of the bushing 2, the spiral groove 21 has a blocking effect on the material, increases the friction of the inner wall of the bushing 2 on the material, reduces the possibility of the material rotating with the screw 3, and increases the conveying capacity. Furthermore, the spiral groove 21 and the screw ridge 32 are perpendicular to each other, and the resistance of the spiral groove 21 acts vertically on the material, which helps to change the movement direction of the material, so that the material is pushed along the axial direction toward the downstream end, effectively improving the material bridging and achieving the effect of efficient feeding.

[0026] In one embodiment, in order to ensure the blocking effect of the bushing 2 on the material, at least one spiral groove 21, for example, one, two, three, four or more, may be provided on the inner wall of the bushing 2. In the case where multiple spiral grooves 21 may be provided on the inner wall of the bushing 2, at one axial end face of the bushing 2, each spiral groove 21 is evenly distributed in the circumferential direction of the bushing 2. Further preferably, four spiral grooves 21 are provided on the inner wall of the bushing 2. It can be seen that the four spiral grooves 21 start on the upstream end face of the bushing 2 in the axial direction, and the starting positions of the four spiral grooves 21 are evenly spaced and distributed in the circumferential direction. By providing a plurality of spiral grooves 21, a wider flow path is provided for the material, so that the material can be conveyed into the barrel 4 more quickly and smoothly, thereby improving the conveying efficiency; secondly, the plurality of spiral grooves 21 can relatively increase the friction of the inner wall of the bushing 2, effectively reducing the accumulation and blockage of the material at the bushing 2; moreover, the plurality of spiral grooves 21 can make the material evenly distributed on the inner wall of the bushing 2, ensuring better mixing and dispersion of the material before entering the barrel 4; and providing four spiral grooves 21 can more effectively increase the friction and improve the conveying efficiency.

[0027] According to this application, if Figure 2 As shown, in a radial cross section of the bushing 2, the ratio of the sum of the groove widths (marked by a) of the spiral groove 21 to the circumference of the inner wall of the bushing 2 is 1 / 3 to 2 / 3. Preferably, the ratio of the sum of the groove widths (marked by a) of the spiral groove 21 to the circumference of the inner wall of the bushing 2 is 1 / 2, that is, the groove width of the spiral groove 21 (marked by a) is 1 / 2. Figure 2 The sum of the inner wall of the bushing 2 (indicated by a) accounts for half of the circumference of the inner wall of the bushing 2. On the inner wall of the bushing 2, this arrangement can make the area occupied by the spiral groove 21 roughly equivalent to the area occupied by the non-spiral groove 21, which helps to maintain the efficient conveying capacity of the extruder.

[0028] In one embodiment, from the feed end of the liner 2 (which is in the same direction as the feed end of the material, i.e., the upstream end), Figure 1 The material is arranged at the right end) to the discharge end (which is in the same direction as the extrusion end of the material, i.e. the downstream end, Figure 1 The groove depth of the spiral groove 21 (in Figure 2 During the operation of the extruder, as the material moves toward the discharge end, the above arrangement can ensure that the material is gradually compacted and squeezed in the bushing 2, thereby improving the material conveying capacity.

[0029] In the present application, for the convenience of processing, the cross-sectional shape of the spiral groove 21 can be semicircular or rectangular. Of course, this does not constitute a limitation on the present application, that is, the cross-sectional shape of the spiral groove 21 can also be configured as other structures, such as a triangle.

[0030] The present application also relates to an extruder. The extruder comprises the above-mentioned hopper seat.

[0031] According to the present application, the extruder also includes a barrel 4 and a bushing pressure ring 5. The barrel 4 is connectedly arranged at the discharge end of the bucket seat body 11 to receive the material from the bucket seat body 11. The bushing pressure ring 5 is sleeved in the inner cavity of the feed end of the bucket seat body 11. After installation, the axial ends of the bushing 2 are respectively abutted against the barrel 4 and the bushing pressure ring 5. The bushing pressure ring 5 can play a role in pressing the bushing 2 onto the barrel 4. The bushing 2 is assembled in the inner cavity of the bucket seat body 11 by an interference fit. The bushing pressure ring 5 is fixed to the bucket seat body 11, for example, bolted. The barrel 4 and the bucket seat body 11 can be bolted. The screw 3 continues to extend from the inner cavity of the bushing 2 to the downstream section, and penetrates into the barrel 4, so as to further convey the material in the barrel 4.

[0032] A mounting groove is provided on the contact surface between the hopper seat body 11 and the barrel 4. Figure 1 In the specific embodiment, the mounting groove includes a first mounting groove 12 provided on the downstream end surface of the hopper seat body 11 and a second mounting groove 41 provided on the upstream end surface of the barrel 4. After the barrel 4 is docked with the hopper seat body 11, the first mounting groove 12 and the second mounting groove 41 form a space for installing the heat insulation layer 8. The installation of the heat insulation layer 8 can be facilitated by providing the mounting grooves 12 and 41. The heat insulation layer 8 has a heat insulation effect to prevent the high temperature on the barrel 4 from being transferred to the hopper seat body 11. The heat insulation layer 8 can be made of heat insulation cotton, and the heat insulation layer 8 is compressible.

[0033] A gasket 6 is selectively provided between the abutting surface of the hopper seat body 11 and the barrel 4. The gasket 6 is located radially outside the heat insulation layer 8. The gasket 6 can adjust the distance between the barrel 4 and the bushing 2, and then adjust the compression degree of the bushing 2 to ensure stable operation of the bushing 2 and other components.

[0034] In addition, a connecting tube 7 is provided on the hopper seat body 11. In the axial direction of the bushing 2, the connecting tube 7 is opposite to the upstream end of the bushing 2. It can be understood that a feeding hole 13 connected to the connecting tube 7 is provided on the hopper seat body 11 and the bushing 2. The connecting tube 7 is connected to an external material source and is used to transport the material into the inner cavity of the bushing 2.

[0035] When the extruder is working, material is added at the connecting barrel 7, and the material enters the inner cavity of the bushing 2 through the feeding hole 13. The material is pushed from the bushing 2 to the barrel 4 through the rotation of the screw 3.

[0036] Although the preferred embodiments of the utility model have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and / or modifications that fall within the scope of the utility model, and changes and / or modifications made according to the embodiments of the utility model should be included within the scope of protection of the utility model.

Claims

1. A hopper seat, characterized in that: It includes a hopper seat body, a bushing sleeved on the inner wall of the hopper seat body, and a screw inserted into the inner cavity of the bushing, wherein the screw includes a screw body and a screw ridge which is spirally arranged on the screw body, and a spiral groove is arranged on the inner wall of the bushing, and the spiral angle of the spiral groove is complementary to the spiral angle of the screw ridge.

2. The hopper seat according to claim 1, characterized in that: A plurality of the spiral grooves are arranged on the inner wall of the bushing, and at one axial end surface of the bushing, the spiral grooves are evenly distributed in the circumferential direction of the bushing.

3. The hopper seat according to claim 2, characterized in that: Four spiral grooves are arranged on the inner wall of the bushing.

4. The hopper seat according to claim 3, characterized in that: In a radial cross section of the bushing, the ratio of the groove width of the spiral groove to the circumference of the inner wall of the bushing is 1 / 3 to 2 / 3.

5. The hopper seat according to any one of claims 1 to 4, characterized in that: In the direction from the feeding end to the discharging end of the bushing, the groove depth of the spiral groove gradually decreases.

6. The hopper seat according to any one of claims 1 to 4, characterized in that: The cross-sectional shape of the spiral groove is semicircular or rectangular.

7. An extruder, characterized in that: A hopper seat comprising the hopper seat according to any one of claims 1 to 6.

8. The extruder according to claim 7, characterized in that Also includes: A barrel is connected to the discharge end of the hopper seat body. A bushing pressure ring is sleeved in the inner cavity of the feeding end of the hopper seat body, Wherein, the axial ends of the bushing are respectively abutted against the barrel and the bushing pressure ring, and the screw extends into the barrel.

9. The extruder according to claim 8, characterized in that A gasket is selectively provided between the abutting surface of the hopper seat body and the barrel.

10. The extruder according to claim 9, characterized in that A mounting groove is arranged on the abutting surface between the hopper seat body and the barrel, a heat insulation layer is embedded in the mounting groove, and the gasket is located radially outside the heat insulation layer.

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