CN114131881A

CN114131881A - Machine barrel screw dismantling tool of conical double-screw extruder

Info

Publication number: CN114131881A
Application number: CN202111434270.XA
Authority: CN
Inventors: 邓权
Original assignee: Deng Quan Plastic Technology Hunan Co ltd
Current assignee: Deng Quan Plastic Technology Hunan Co ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-03-04
Anticipated expiration: 2041-11-29
Also published as: CN114131881B

Abstract

The invention is suitable for the related technical field of dismantling tools, and provides a machine barrel screw dismantling tool of a conical double-screw extruder, which comprises a bottom plate, wherein two groups of pneumatic parts are arranged on the bottom plate, each pneumatic part comprises a guide plate which is fixed on the side part of the bottom plate and is hollow inside, and a telescopic plate which is arranged in the guide plate in a sliding manner, two cylinders are arranged on the side part of the guide plate, a clamping part is rotatably arranged on one end, far away from the bottom plate, of the telescopic plate, a rotating shaft of the clamping part is connected with an elastic reset mechanism arranged on the telescopic plate, a thread driving mechanism is also arranged on the side part of the telescopic plate, four pressing parts for limiting the head end of a machine barrel are movably arranged on the side part of the bottom plate through four groups of adjusting mechanisms, a top plate for ejecting an internal screw rod is arranged through an ejection mechanism, and through mutual matching among all the mechanisms and the parts, the quick dismantling function of the machine barrel and the screw rod is realized, and the tool is convenient to use.

Description

Machine barrel screw dismantling tool of conical double-screw extruder

Technical Field

The invention belongs to the technical field related to dismantling tools, and particularly relates to a machine barrel screw dismantling tool of a conical double-screw extruder.

Background

The conical double-screw extruder is efficient mixing and extruding equipment, and has the characteristics of uniform plasticizing and mixing, high yield, stable quality, wide application range, long service life, direct molding of PVC powder and the like. By means of the corresponding die and auxiliary machine, various thermoplastic plastics, especially hard polyvinyl chloride powder, may be extruded into pipe, plate, sheet, rod, film, profile and other plastic products, and the modification and powder pelletizing of various plastics may be completed.

The double-screw extruder is developed on the basis of a single-screw extruder, and has the characteristics of good feeding performance, mixing plasticizing performance, exhaust performance, extrusion stability and the like, so that the double-screw extruder is widely applied to molding and processing of extruded products at present, and after the conical double-screw extruder is used for a period of time, the abrasion condition and the clearance of a barrel screw need to be checked. For normal periodic inspection, the barrel and screw fit is better, and the barrel and screw separation is still better.

However, under the condition that the melting material is expanded in the machine barrel due to excessive blanking in the machine barrel, the screw and the machine barrel are locked, the machine barrel and the screw are not easy to separate, and the maintenance work of the conical double-screw extruder is inconvenient.

Disclosure of Invention

The invention provides a machine barrel screw dismantling tool of a conical double-screw extruder, and aims to solve the problem that the machine barrel and a screw of the conical double-screw extruder are difficult to separate.

The machine barrel screw dismantling tool of the conical double-screw extruder comprises a bottom plate, wherein two groups of pneumatic parts are arranged on the bottom plate, each pneumatic part comprises a guide plate and a telescopic plate, the guide plate is fixed on the side part of the bottom plate, the inner part of the guide plate is hollow, the telescopic plate is arranged in the guide plate in a sliding mode, two cylinders are arranged on the side part of the guide plate, and the movable ends of the cylinders are fixed with the telescopic plate;

a clamping piece for limiting the tail end of the machine barrel is rotatably arranged on one end, away from the bottom plate, of the telescopic plate, the clamping piece is arranged in a barb shape, and a rotating shaft of the clamping piece is connected with an elastic resetting mechanism arranged on the telescopic plate;

the side part of the telescopic plate is also provided with a thread driving mechanism for driving the clamping piece to turn over, and the elastic reset mechanism stores elastic potential energy in the process that the thread driving mechanism drives the clamping piece to turn over towards the end part of the machine barrel;

the side part of the bottom plate is also movably provided with four pressing pieces for limiting the head end of the machine barrel through four groups of adjusting mechanisms, and an ejecting plate for ejecting a screw rod in the machine barrel is arranged through an ejecting mechanism, the pressing pieces are arranged in an arc shape, and the central axis of the ejecting plate penetrates through the geometric center of the bottom plate.

Furthermore, the screw thread actuating mechanism is including installing screw on the expansion plate and with the screw thread is connected and with fastener complex rolling structure, the screw thread is including rotating to be installed No. two lead screws on the expansion plate, set up and be in moving plate on No. two lead screws and fixing No. two lead screws are kept away from an epaxial runner of fastener, the moving plate with rolling structural connection and its side with the expansion plate slides and laminates.

Furthermore, the rolling structure comprises an ejector rod fixed on the moving plate, a pulley installed at one end, far away from the moving plate, of the ejector rod, and a transmission plate fixed on the clamping piece and abutted to the pulley, wherein the transmission plate is arranged in an L shape.

Furthermore, elasticity canceling release mechanical system is including installing elasticity slider and meshing structure on the expansion plate, elasticity slider includes to be fixed through outstanding piece the guide bar on the expansion plate, slide setting are in slide bar on the guide bar and connection outstanding piece with the spring of slide bar, the spring housing is established on the periphery of guide bar.

Further, the engaging structure includes a gear fixed to an end of the engaging member rotating shaft and a rack plate fixed to an end of the slide rod away from the protruding block, and teeth on the rack plate are engaged with the gear.

Furthermore, the adjusting mechanism comprises a first screw rod rotatably mounted on the bottom plate and a threaded plate arranged on the first screw rod, the pressing piece is fixed on the threaded plate, four cross rods parallel to the first screw rod are fixedly mounted on the bottom plate, and the cross rods penetrate through the threaded plate and are in sliding connection with the threaded plate.

Furthermore, the ejection mechanism comprises a threaded sleeve fixed at the center of the bottom plate and an inner hexagonal screw which is rotationally connected with the top disc and penetrates through the threaded sleeve, and the central axes of the inner hexagonal screw, the top disc and the threaded sleeve are coincided.

Compared with the prior art, the invention has the beneficial effects that:

in specific implementation, the cylinder works to drive the expansion plate to slide in the guide plate to adjust the distance between the clamping piece and the tail end of the machine barrel, after the clamping piece reaches a proper position, the thread driving mechanism works to drive the clamping piece to turn over and clamp the tail end of the machine barrel, in the process, the elastic reset mechanism stores elastic potential energy, and then, the position of the pressing piece is adjusted through the adjusting mechanism, the pressing piece makes linear motion along the tangential direction of the machine barrel, finally, the head end of the machine barrel is clamped by the four pressing pieces, the ejection mechanism works, the ejection disc moves towards the interior of the machine barrel to eject the screw rod in the machine barrel, through the mutual matching of all the mechanisms and the parts, the quick dismantling function of the machine barrel and the screw rod is realized, because the tool is convenient to use, the maintenance work of the conical double-screw extruder is facilitated, and the tool is suitable for popularization and use.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic diagram of the structure provided by the present invention.

Fig. 2 is a schematic view of another angle structure provided by the present invention.

Fig. 3 is an enlarged view of the structure at a in fig. 1 according to the present invention.

Fig. 4 is an enlarged view of the structure at B in fig. 1 according to the present invention.

Fig. 5 is an exploded view of the resilient return mechanism provided by the present invention.

Reference numerals:

1-a bottom plate; 2-a guide plate; 3-a telescopic plate; 4-a cylinder; 5-a fastener; 6-top plate; 7-inner hexagonal screw; 8-a threaded sleeve; 9-pressing piece; 10-a screw rod; 11-a thread plate; 12-a drive plate; 13-second lead screw; 14-moving the plate; 15-a mandril; 16-a pulley; 17-a runner; 18-gear wheel; 19-a rack plate; 20-a slide bar; 21-a protruding block; 22-a guide bar; 23-spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In order to effectively explain embodiments of the present invention, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1-5, the present invention provides a barrel screw removing tool for a conical twin-screw extruder to solve the problem that the separation of the barrel and the screw of the conical twin-screw extruder is not easy.

The machine barrel screw dismantling tool of the conical double-screw extruder comprises a bottom plate 1, wherein two groups of pneumatic parts are mounted on the bottom plate 1, each pneumatic part comprises a guide plate 2 which is fixed on the side part of the bottom plate 1 and is hollow inside and an expansion plate 3 which is arranged in the guide plate 2 in a sliding manner, two cylinders 4 are mounted on the side part of the guide plate 2, and the movable ends of the cylinders 4 are fixed with the expansion plate 3;

a clamping piece 5 for limiting the tail end of the machine barrel is rotatably arranged on one end, away from the bottom plate 1, of the telescopic plate 3, the clamping piece 5 is arranged in a barb shape, and a rotating shaft of the clamping piece 5 is connected with an elastic resetting mechanism arranged on the telescopic plate 3;

and a thread driving mechanism for driving the clamping piece 5 to overturn is further installed on the side part of the telescopic plate 3, and the elastic reset mechanism stores elastic potential energy in the process that the thread driving mechanism drives the clamping piece 5 to overturn towards the end part of the machine barrel.

The thread driving mechanism comprises a thread piece arranged on the expansion plate 3 and a rolling structure connected with the thread piece and matched with the clamping piece 5, the thread piece comprises a second screw rod 13 arranged on the expansion plate 3, a moving plate 14 arranged on the second screw rod 13 and a rotating wheel 17 fixed on the second screw rod 13 and far away from the clamping piece 5, and the moving plate 14 is connected with the rolling structure and the side surface of the rolling structure is in sliding fit with the expansion plate 3.

The rolling structure comprises a top rod 15 fixed on the moving plate 14, a pulley 16 installed at one end, far away from the moving plate 14, of the top rod 15, and a transmission plate 12 fixed on the clamping piece 5 and abutted to the pulley 16, wherein the transmission plate 12 is in an L shape.

Elasticity canceling release mechanical system is including installing elasticity slider and meshing structure on the expansion plate 3, elasticity slider includes to be fixed through outstanding piece 21 guide bar 22 on the expansion plate 3, slide and set up slide bar 20 on the guide bar 22 and connection outstanding piece 21 with slide bar 20's spring 23, spring 23 cover is established on the periphery of guide bar 22.

The engaging structure includes a gear 18 fixed to a distal end of a rotation shaft of the engaging member 5, and a rack plate 19 fixed to an end of the slide rod 20 remote from the protruding block 21, and teeth on the rack plate 19 are engaged with the gear 18.

Further, a through hole for the second screw rod 13 to pass through is formed in the moving plate 14, and a thread matched with the second screw rod 13 is arranged on the inner wall of the through hole;

the purpose of sliding and attaching the moving plate 14 and the expansion plate 3 is mainly to guide the movement of the moving plate 14 and ensure normal threaded matching between the moving plate 14 and the second screw rod 13.

When the tool is used, the turning wheel 17 rotates the second lead screw 13, the moving plate 14 is in threaded fit with the second lead screw 13 and moves linearly towards the clamping piece 5, so that the ejector rod 15 pushes the pulley 16 to roll on the transmission plate 12, the transmission plate 12 drives the clamping piece 5 to turn over, the tail end of the machine barrel is clamped, in the process of turning over the clamping piece 5, the gear 18 rotates together with the pulley and is matched with the rack plate 19, the rack plate 19 drives the sliding rod 20 to slide towards the direction far away from the protruding block 21 on the guide rod 22, the spring 23 is stretched, after the tool is used, the second lead screw 13 is rotated reversely, the moving plate 14 moves towards the direction far away from the clamping piece 5, in the process, the spring 23 rebounds, and the rack plate 19 drives the gear 18 and the clamping piece 5 to rotate reversely, so that the clamping piece 5 is reset.

Four pressing pieces 9 used for limiting the head end of the machine barrel are movably arranged on the side portion of the bottom plate 1 through four groups of adjusting mechanisms, a top plate 6 used for ejecting a screw rod in the machine barrel is arranged through an ejection mechanism, the pressing pieces 9 are arranged in an arc shape, and the central axis of the top plate 6 penetrates through the geometric center of the bottom plate 1.

The adjusting mechanism comprises a first screw rod 10 rotatably mounted on the base plate 1 and a thread plate 11 arranged on the first screw rod 10, the pressing piece 9 is fixed on the thread plate 11, four cross rods parallel to the first screw rod 10 are fixedly mounted on the base plate 1, and the cross rods penetrate through the thread plate 11 and are in sliding connection with the thread plate.

Note that the four first screw rods 10 form a square shape, two ends of each of the two first screw rods 10 are respectively fixed with a bevel gear, and the other two first screw rods 10 are fixed with a bevel gear.

When the ejection mechanism is used, one of the first screw rods 10 is rotated, so that the four first screw rods 10 are simultaneously rotated through the bevel gears, the thread plate 11 is matched with the first screw rod 13 and drives the pressing piece 9 to do linear motion along the tangential direction of the machine barrel, and finally, the four pressing pieces 9 clamp the head end of the machine barrel so as to ensure the stability of the ejection of the screw rods in the machine barrel by the ejection disc 6.

The ejection mechanism comprises a threaded sleeve 8 fixed at the center of the bottom plate 1 and an inner hexagonal screw 7 which is rotationally connected with the top disc 6 and penetrates through the threaded sleeve 8, and the central axes of the inner hexagonal screw 7, the top disc 6 and the threaded sleeve 8 are overlapped.

When the screw ejecting mechanism is used, the inner hexagonal screw 7 is rotated, the inner hexagonal screw 7 is matched with the threaded sleeve 8, so that the top disc 6 is driven to move towards the machine barrel, and the top disc 6 gradually ejects out the screw in the machine barrel;

if the top disk 6 is fixedly connected with the hexagon socket head cap screw 7, after the top disk 6 contacts with the screw in the machine barrel, resistance may exist in the top disk 6, so that the rotation of the hexagon socket head cap screw 7 is difficult, and the operation is laborious.

It should be noted that, the air cylinder 4 may also be replaced by an electric telescopic rod or a hydraulic cylinder, and this is not specifically limited in this application and may be selected according to actual requirements.

When the device is implemented specifically, the air cylinder 4 works to drive the expansion plate 3 to slide in the guide plate 2, the distance between the clamping piece 5 and the tail end of the machine barrel is adjusted, the thread driving mechanism works after the clamping piece 5 reaches a proper position to drive the clamping piece 5 to turn over and clamp the tail end of the machine barrel, in the process, the elastic reset mechanism stores elastic potential energy, then the position of the pressing piece 9 is adjusted through the adjusting mechanism, the pressing piece 9 makes linear motion along the tangential direction of the machine barrel, finally, the head end of the machine barrel is clamped by the four pressing pieces 9, the ejection mechanism works, the top disc 6 moves towards the interior of the machine barrel and ejects a screw in the machine barrel;

in conclusion, through the mutual matching of all the mechanisms and the parts, the quick dismantling function of the machine barrel and the screw is realized, and the tool is convenient to use, so that the maintenance work of the conical double-screw extruder is facilitated, and the conical double-screw extruder is suitable for popularization and application.

Note that before actual use, if the screw and barrel are tightly clamped, the barrel may be warmed up in advance, the copper bar is used to knock the two screw tips, and the barrel and screw are removed by the removal tool provided in this application.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A machine barrel screw dismantling tool of a conical double-screw extruder is characterized by comprising a bottom plate (1), wherein two groups of pneumatic components are arranged on the bottom plate (1);

the pneumatic piece comprises a guide plate (2) which is fixed on the side part of the bottom plate (1) and is hollow inside and a telescopic plate (3) which is arranged in the guide plate (2) in a sliding manner, two cylinders (4) are mounted on the side part of the guide plate (2), and the movable ends of the cylinders (4) are fixed with the telescopic plate (3);

a clamping piece (5) used for limiting the tail end of the machine barrel is rotatably arranged at one end, away from the bottom plate (1), of the telescopic plate (3), the clamping piece (5) is arranged in a barb shape, and the rotating shaft of the clamping piece (5) is connected with an elastic resetting mechanism arranged on the telescopic plate (3);

the side part of the telescopic plate (3) is also provided with a thread driving mechanism for driving the clamping piece (5) to overturn, and the elastic reset mechanism stores elastic potential energy in the process that the thread driving mechanism drives the clamping piece (5) to overturn towards the end part of the machine barrel;

the side part of the bottom plate (1) is also movably provided with four pressing pieces (9) used for limiting the head end of the machine barrel through four groups of adjusting mechanisms, and a top disc (6) used for ejecting a screw rod in the machine barrel is arranged through an ejection mechanism, the pressing pieces (9) are arranged in an arc shape, and the central axis of the top disc (6) penetrates through the geometric center of the bottom plate (1).

2. The barrel screw removing tool of a conical twin-screw extruder according to claim 1, wherein the screw driving mechanism comprises a screw member mounted on the telescopic plate (3) and a rolling structure connected with the screw member and cooperating with the snap member (5).

3. The barrel screw removing tool of the conical twin-screw extruder according to claim 2, wherein the screw member comprises a second screw rod (13) rotatably mounted on the telescopic plate (3), a moving plate (14) arranged on the second screw rod (13), and a rotating wheel (17) fixed on one end of the second screw rod (13) far away from the engaging member (5), wherein the moving plate (14) is connected with the rolling structure and has a side surface in sliding fit with the telescopic plate (3).

4. The barrel screw removing tool of a conical twin-screw extruder according to claim 3, wherein the rolling structure comprises a push rod (15) fixed on the moving plate (14), a pulley (16) mounted on one end of the push rod (15) away from the moving plate (14), and a driving plate (12) fixed on the engaging member (5) and abutting against the pulley (16), the driving plate (12) being provided in an "L" shape.

5. The barrel screw removing tool of a conical twin-screw extruder according to claim 1, wherein the elastic return mechanism comprises an elastic sliding member and a toothed structure, the elastic sliding member is mounted on the telescopic plate (3), the elastic sliding member comprises a guide rod (22) fixed on the telescopic plate (3) through a protruding block (21), a sliding rod (20) slidably arranged on the guide rod (22), and a spring (23) connecting the protruding block (21) and the sliding rod (20), and the spring (23) is sleeved on the outer periphery of the guide rod (22).

6. The barrel screw removing tool of a conical twin-screw extruder according to claim 5, characterized in that the engaging structure comprises a gear (18) fixed to the end of the rotating shaft of the engaging member (5) and a rack plate (19) fixed to the end of the slide rod (20) remote from the protruding block (21), the teeth on the rack plate (19) engaging with the gear (18).

7. The barrel screw removing tool of a conical twin-screw extruder according to claim 1, wherein the adjusting mechanism comprises a first screw (10) rotatably mounted on the base plate (1) and a thread plate (11) provided on the first screw (10), the pressing member (9) being fixed to the thread plate (11);

the bottom plate (1) is further fixedly provided with four cross rods parallel to the first screw rod (10), and the cross rods penetrate through the thread plate (11) and are connected with the thread plate in a sliding mode.

8. The barrel screw removal tool of a conical twin-screw extruder according to claim 1, characterized in that the ejection mechanism comprises a threaded sleeve (8) fixed at the center of the bottom plate (1), an inner hexagonal screw (7) rotatably connected with the top disk (6) and passing through the threaded sleeve (8), the central axes of the inner hexagonal screw (7), the top disk (6) and the threaded sleeve (8) being coincident.