Parallel double-screw extruder cylinder

Abstract

The parallel double-screw extruder barrel comprises a plurality of barrel bodies, double-barrel extrusion flow channels are formed in inner cavities of the barrel bodies, the two ends of each barrel body are connected with connecting flanges, and spiral flow channels allowing a cooling medium to flow are formed in the inner cavities of the barrel bodies. A liquid inlet mechanism and a liquid outlet mechanism which are communicated with the two ends of the spiral flow channel are respectively arranged at the two ends of the barrel body. According to the machine barrel of the parallel double-screw extruder, the connecting position can be effectively sealed through expansion adaptation of the sealing film and the annular extrusion air bag, connection operation is convenient, extra power is not needed, connection is achieved only through opposite insertion, and sealing connection can be automatically conducted when the two barrel bodies are locked through the connecting flange.

Description

Technical Field

[0001] The invention relates to the technical field of extruder barrels, in particular to a parallel twin-screw extruder barrel. Background Art

[0002] The screw extruder relies on the pressure and shear force generated by the rotation of the screw to fully plasticize and evenly mix the materials and form them through the die. Plastic extruders can be basically classified into twin-screw extruders, single-screw extruders, and the less common multi-screw extruders and screwless extruders.

[0003] The existing twin-screw extruder has the following defects: during the barrel connection process, the positions of the two adjacent barrels need to be manually adjusted repeatedly so that their connecting holes are aligned with each other; then the two barrels are bolted together using fastening bolts; and since the barrel itself is heavy, the repeated adjustment process by the staff is rather laborious, which makes the installation process of the barrel time-consuming and laborious. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a parallel twin-screw extruder barrel to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a barrel of a parallel twin-screw extruder comprises a plurality of barrels, the inner cavities of a plurality of the barrels are provided with twin-barrel extrusion channels, both ends of the plurality of the barrels are connected with connecting flanges, the inner cavity of the barrel is provided with a spiral channel for cooling medium to flow, and both ends of the barrel are respectively provided with a liquid inlet mechanism and a liquid outlet mechanism connected with both ends of the spiral channel;

[0006] The liquid inlet mechanism includes a plug-in tube arranged at the right end of the cylinder, the left end of the plug-in tube is covered with an extrusion block, the liquid outlet mechanism includes a plug-in slot opened at the left end of the cylinder, the right end of the plug-in slot is communicated with the spiral flow channel through a connecting tube extending into the inner cavity of the plug-in slot, the inner cavity of the plug-in slot is slidably connected with an extrusion ring, one end of the extrusion ring is fixedly connected with an annular extrusion airbag located in the inner cavity of the plug-in slot, the plug-in slot is arranged on the surface of the cylinder and has an arc groove, the surface of the arc groove is fixedly connected with a sealing film fixedly connected to the side of the extrusion ring, the inner cavity of the arc groove is in contact with the surface of the extrusion block, and the cylinder is inflated when in use. During assembly, the cylinder is connected to the left and right through the connecting flanges on both sides. At this time, the plug-in tube on the right is plugged into the plug-in groove, the plug-in tube passes through the extrusion ring and the inner cavity of the annular extrusion airbag, and then is sleeved on the surface of the connecting tube to complete the connection. At this time, the extrusion block squeezes the extrusion ring in the arc groove, compresses the annular extrusion airbag, and makes it expand and tightly adhere to the surface of the plug-in tube for sealing. The connection can be effectively sealed through the expansion adaptation of the sealing film and the annular extrusion airbag, and the connection operation is convenient, no additional power is required, only the plug-in is connected, and the sealing connection can be automatically performed when the two cylinders are locked through the connecting flange.

[0007] As a further solution of the present invention: the inner diameter of the annular extrusion airbag is equal to the outer diameter of the plug-in tube, so that the plug-in tube can be smoothly inserted into the annular extrusion airbag while ensuring good sealing performance.

[0008] As a further solution of the present invention: the left end of the connecting pipe is plugged into the inner cavity of the plug-in pipe.

[0009] As a further solution of the present invention: the outer sides of the cylinder and the connecting flange are both circular.

[0010] As a further solution of the present invention: the inner cavities of the plurality of cylinders are all provided with a heat-insulating interlayer covering the outside of the spiral flow channel.

[0011] As a further solution of the present invention: the multiple cylinders are positioned and connected by positioning rods, a conical protrusion is provided in the middle of the positioning rod, positioning grooves for positioning and plugging with the positioning rod are provided on both sides of the cylinder, and a conical groove matching the conical protrusion is provided in the inner cavity of the positioning groove.

[0012] As a further solution of the present invention: the inner cavity of the positioning groove on the left side of the cylinder is provided with a receiving groove, the inner cavity of the receiving groove is fixedly connected with a reset spring, the end of the reset spring is fixedly connected with an abutment block, the inner cavity of the positioning rod is provided with an abutment groove that is engaged with the surface of the abutment block, the bottom of the abutment block is semicircular, and when the two cylinders need to be connected during use, they need to be aligned first, the positioning rod is first inserted into the positioning groove of the right cylinder, and then the positioning rod is rotated so that the reset spring drives the abutment block to be inserted into the abutment groove, The positioning rod is limited to the left and right to prevent it from slipping, and then the left cylinder is put on the left positioning rod. At this time, the middle part of the positioning rod bears a large amount of pressure, and the connection between the conical groove and the conical protrusion increases the bending resistance of the positioning rod to prevent the positioning rod from bending due to pressure during connection and positioning. When taking it out later, you only need to rotate the positioning rod, and under the guidance of the semicircular bottom of the abutment block, the abutment block is rotated out of the abutment groove. At this time, the reset spring is compressed, and the left and right limits on the positioning rod are cancelled, so the positioning rod can be easily slid out.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention can effectively seal the connection through the expansion adaptation of the sealing film and the annular extrusion airbag, and the connection operation is convenient, no additional power is required, and only the plug is connected. When the two cylinders are locked by the connecting flange, the sealing connection can be automatically performed.

[0015] 2. The present invention increases the anti-bending ability of the positioning rod by the connection between the conical groove and the conical protrusion, thereby preventing the positioning rod from bending due to pressure when connected and positioned, and when taking it out later, it is only necessary to rotate the positioning rod, and under the guidance of the semicircular bottom of the abutment block, the abutment block is rotated out of the abutment groove. At this time, the reset spring is compressed, and the left and right limits on the positioning rod are cancelled, so the positioning rod can be easily slid out. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a schematic diagram of the structural connection of the present invention;

[0018] Figure 3 For the present invention Figure 1 A partial enlarged view of the middle A;

[0019] Figure 4 For the present invention Figure 1 A partial enlarged view of point B in the middle;

[0020] Figure 5 It is a schematic structural diagram of the abutment block of the present invention.

[0021] In the figure: 1. Cylinder; 2. Connecting flange; 3. Double-barrel extrusion flow channel; 4. Plug-in tube; 5. Plug-in groove; 6. Connecting tube; 7. Extrusion ring; 8. Annular extrusion airbag; 9. Arc groove; 10. Sealing film; 11. Positioning rod; 12. Positioning groove; 13. Cone groove; 14. Cone protrusion; 15. Accommodating groove; 16. Reset spring; 17. Abutment groove; 18. Abutment block; 19. Semicircle. DETAILED DESCRIPTION

[0022] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0023] See also Figure 1-5 The present invention provides a technical solution: a parallel twin-screw extruder barrel, comprising a plurality of barrels 1, the inner cavities of the plurality of barrels 1 are each provided with a twin-barrel extrusion flow channel 3, both ends of the plurality of barrels 1 are connected with a connecting flange 2, the inner cavity of the barrel 1 is provided with a spiral flow channel for the flow of a cooling medium, and both ends of the barrel 1 are respectively provided with a liquid inlet mechanism and a liquid outlet mechanism connected with both ends of the spiral flow channel;

[0024] The liquid inlet mechanism includes a plug-in tube 4 arranged at the right end of the cylinder 1, and the left end of the plug-in tube 4 is covered with an extrusion block. The liquid outlet mechanism includes a plug-in slot 5 opened at the left end of the cylinder 1. The right end of the plug-in slot 5 is connected to the spiral flow channel through a connecting tube 6 extending into the inner cavity of the plug-in slot 5. The inner cavity of the plug-in slot 5 is slidably connected with an extrusion ring 7, and one end of the extrusion ring 7 is fixedly connected with an annular extrusion airbag 8 located in the inner cavity of the plug-in slot 5. The plug-in slot 5 is arranged on the surface of the cylinder 1 and has an arc groove 9. The surface of the arc groove 9 is fixedly connected with a sealing film 10 fixedly connected to the side of the extrusion ring 7. The inner cavity of the arc groove 9 fits with the surface of the extrusion block. When the cylinder 1 is assembled during use The cylinder 1 is connected to the left and right through the connecting flanges 2 on both sides. At this time, the plug-in tube 4 on the right is plugged into the plug-in groove 5, and the plug-in tube 4 penetrates the inner cavity of the extrusion ring 7 and the annular extrusion airbag 8 and then is sleeved on the surface of the connecting tube 6 to complete the connection. At this time, the extrusion block squeezes the extrusion ring 7 in the arc groove 9, compresses the annular extrusion airbag 8, and expands it to fit tightly against the surface of the plug-in tube 4 for sealing. The expansion adaptation of the sealing film 10 and the annular extrusion airbag 8 can effectively seal the connection, and the connection operation is convenient, without additional power, only the plug-in connection is required, and the sealing connection can be automatically performed when the two cylinders 1 are locked through the connecting flange 2.

[0025] The inner diameter of the annular extrusion airbag 8 is equal to the outer diameter of the plug-in tube 4 , so that the plug-in tube 4 can be smoothly inserted into the annular extrusion airbag 8 while ensuring good sealing performance.

[0026] The left end of the connecting pipe 6 is plugged into the inner cavity of the plug-in pipe 4 .

[0027] The outer sides of the cylinder 1 and the connecting flange 2 are both circular.

[0028] The inner cavities of the plurality of cylinders 1 are all provided with a heat-insulating interlayer covering the spiral flow channel.

[0029] The multiple cylinders 1 are positioned and connected by a positioning rod 11, a conical protrusion 14 is provided in the middle of the positioning rod 11, positioning grooves 12 for positioning and plugging with the positioning rod 11 are provided on both sides of the cylinder 1, and a conical groove 13 adapted to the conical protrusion 14 is provided in the inner cavity of the positioning groove 12.

[0030] The inner cavity of the positioning groove 12 on the left side of the cylinder 1 is provided with a receiving groove 15, and the inner cavity of the receiving groove 15 is fixedly connected with a reset spring 16, and the end of the reset spring 16 is fixedly connected with an abutment block 18, and the inner cavity of the positioning rod 11 is provided with an abutment groove 17 that is engaged with the surface of the abutment block 18, and the bottom of the abutment block 18 is a semicircular 19. When the two cylinders 1 need to be connected in use, they need to be aligned first, first insert the positioning rod 11 into the positioning groove 12 of the right cylinder 1, and then rotate the positioning rod 11 so that the reset spring 16 drives the abutment block 18 to be inserted into the abutment groove 17, and the positioning rod 11 is aligned. The left and right limits are set to prevent it from sliding off, and then the left cylinder 1 is put on the left positioning rod 11. At this time, the middle part of the positioning rod 11 bears a lot of pressure. The connection between the conical groove 13 and the conical protrusion 14 increases the bending resistance of the positioning rod 11 to prevent the positioning rod 11 from bending due to pressure during connection and positioning. When taking it out later, you only need to rotate the positioning rod 11. Under the guidance of the semicircular 19 at the bottom of the abutment block 18, the abutment block 18 is screwed out of the abutment groove 17. At this time, the reset spring 16 is compressed. At this time, the left and right limits on the positioning rod 11 are cancelled, and the positioning rod 11 can be easily slid out.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A parallel twin-screw extruder barrel, comprising a plurality of barrels (1), wherein the inner cavities of the plurality of barrels (1) are provided with twin-barrel extrusion channels (3), and both ends of the plurality of barrels (1) are connected with connecting flanges (2), characterized in that: The inner cavity of the cylinder (1) is provided with a spiral flow channel for the cooling medium to flow, and the two ends of the cylinder (1) are respectively provided with a liquid inlet mechanism and a liquid outlet mechanism which are connected with the two ends of the spiral flow channel; The liquid inlet mechanism comprises a plug-in tube (4) arranged at the right end of the cylinder (1), the left end of the plug-in tube (4) is covered with an extrusion block, and the liquid outlet mechanism comprises a plug-in slot (5) provided at the left end of the cylinder (1), the right end of the plug-in slot (5) is communicated with the spiral flow channel through a connecting tube (6) extending into the inner cavity of the plug-in slot (5), the inner cavity of the plug-in slot (5) is slidably connected with an extrusion ring (7), one end of the extrusion ring (7) is fixedly connected with an annular extrusion airbag (8) located in the inner cavity of the plug-in slot (5), the plug-in slot (5) is provided on the surface of the cylinder (1) and is provided with an arc groove (9), the surface of the arc groove (9) is fixedly connected with a sealing film (10) fixedly connected to the side of the extrusion ring (7), and the inner cavity of the arc groove (9) is in contact with the surface of the extrusion block.

2. The parallel twin-screw extruder barrel according to claim 1, characterized in that: The inner diameter of the annular extrusion airbag (8) is equal to the outer diameter of the plug-in tube (4), so that the plug-in tube (4) can be smoothly inserted into the annular extrusion airbag (8) while ensuring good sealing performance.

3. The parallel twin-screw extruder barrel according to claim 1, characterized in that: The left end of the connecting pipe (6) is plugged into the inner cavity of the plug-in pipe (4).

4. The parallel twin-screw extruder barrel according to claim 1, characterized in that: The outer sides of the cylinder (1) and the connecting flange (2) are both circular.

5. The parallel twin-screw extruder barrel according to claim 1, characterized in that: The inner cavities of the plurality of cylinders (1) are all provided with a heat-insulating interlayer covering the outside of the spiral flow channel.

6. The parallel twin-screw extruder barrel according to claim 1, characterized in that: The plurality of cylinders (1) are connected in a positioning manner via a positioning rod (11), a truncated cone protrusion (14) is provided in the middle of the positioning rod (11), positioning grooves (12) for positioning and plugging with the positioning rod (11) are provided on both sides of the cylinder (1), and a truncated cone groove (13) adapted to the truncated cone protrusion (14) is provided in the inner cavity of the positioning groove (12).

7. The parallel twin-screw extruder barrel according to claim 6, characterized in that: The inner cavity of the positioning groove (12) on the left side of the cylinder (1) is provided with a receiving groove (15), the inner cavity of the receiving groove (15) is fixedly connected with a reset spring (16), the end of the reset spring (16) is fixedly connected with an abutment block (18), the inner cavity of the positioning rod (11) is provided with an abutment groove (17) which is engaged with the surface of the abutment block (18), and the bottom of the abutment block (18) is semicircular (19).

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