CN113308055B

CN113308055B - Laser printer positive electricity developing roller and preparation method and equipment thereof

Info

Publication number: CN113308055B
Application number: CN202110529185.5A
Authority: CN
Inventors: 伍康庄
Original assignee: Zhongshan Zhiwei Printing Technology Co ltd
Current assignee: Zhongshan Zhiwei Printing Technology Co ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2022-10-18
Anticipated expiration: 2041-05-14
Also published as: CN113308055A

Abstract

The invention discloses a laser printer positive electricity developing roller and a preparation method and equipment thereof, the laser printer positive electricity developing roller comprises a semi-conductive colloid, a charged coating shaft core is arranged at the shaft center of the semi-conductive colloid in a penetrating way, and the laser printer positive electricity developing roller is characterized in that the semi-conductive colloid comprises the following components in parts by weight: 80-120 parts of ethylene propylene diene monomer 6950C,1-9 parts of zinc oxide, 0.1-2 parts of stearic acid SA-1801, 30-80 parts of N550 carbon black, 40-80 parts of paraffin oil, 3-10 parts of superconducting carbon black, 1-8 parts of ethylene propylene diene monomer composite accelerator EG3A,0.5-3 parts of sulfur, 0.01-0.5 part of fumed silica, 10-30 parts of styrene-butadiene rubber and 1-5 parts of calcium carbonate. The invention utilizes the characteristic that the ethylene propylene diene monomer is nonpolar rubber, and the ethylene propylene diene monomer is a polymer material with the weakest molecular polarity in the nonpolar rubber, is particularly suitable for the development of positive carbon powder, has the printing chromaticity reaching 1.5 and can solve the problem of printing double images; the development roller production cost can be reduced by utilizing the characteristic that the ethylene propylene diene monomer rubber can be filled with high filling.

Description

Laser printer positive electricity developing roller and preparation method and equipment thereof

Technical Field

The invention relates to the technical field of printers, in particular to a laser printer positive electricity developing roller and a preparation method and equipment thereof.

Background

The laser printer is a printing output device combining a laser scanning technology and an electronic photography technology, and the consumables of the laser printer mainly comprise an OPC photosensitive drum, carbon powder, an imaging roller (comprising a charging roller, a developing roller, a powder feeding roller, a transfer roller and the like), a fixing roller (comprising a heating roller and a pressure roller) and various scrapers. The developing roller is a weight component of the laser printer and is responsible for charging carbon powder (toner) and accurately conveying the charged carbon powder to an electrostatic latent image area of a photosensitive drum to form a carbon powder image on the photosensitive drum. The existing developing roller is divided into a developing magnetic roller and a developing rubber roller, and because the carbon powder used by the developing rubber roller does not contain a carrier, the structure of a printer can be greatly simplified, and the requirement on miniaturization of the printer is met, the developing rubber roller replaces the developing magnetic roller and is widely used.

The existing developing rubber roller has a surface grinding processing procedure in the manufacturing process without exception, the surface grinding processing cost is higher, and the manual grinding is time-consuming, labor-consuming and extremely inconvenient.

Disclosure of Invention

The invention aims to provide a positive electricity developing roller of a laser printer and a preparation method and equipment thereof, which solve the problems of the background technology.

In order to achieve the purpose, the invention adopts the following scheme:

the positive electricity developing roller of the laser printer comprises a semi-conductive colloid, wherein a charged coating shaft core is arranged at the shaft center of the semi-conductive colloid in a penetrating way, and the positive electricity developing roller is characterized in that the semi-conductive colloid comprises the following components in parts by weight: 80-120 parts of ethylene propylene diene monomer rubber 6950C,1-9 parts of zinc oxide, 0.1-2 parts of stearic acid SA-1801, 30-80 parts of N550 carbon black, 40-80 parts of paraffin oil, 3-10 parts of superconducting carbon black, 1-8 parts of ethylene propylene diene monomer composite accelerator EG3A,0.5-3 parts of sulfur, 0.01-0.5 part of fumed silica, 10-30 parts of styrene-butadiene rubber and 1-5 parts of calcium carbonate.

A method for preparing the positive developing roller of the laser printer is characterized by comprising the following steps:

s1, adding ethylene propylene diene monomer 6950C, zinc oxide, stearic acid SA-1801, N550 carbon black, paraffin oil, superconducting carbon black, ethylene propylene diene monomer composite accelerator EG3A, fumed silica, styrene-butadiene rubber and calcium carbonate into an internal mixer for internal mixing to obtain an internal mixing mixture;

s2, filtering the banburying mixture in the step S1 by using a rubber filter, and standing for 24-72 hours;

s3, putting the banburying mixture obtained in the step S2 into an open mill, adding sulfur, and performing extrusion molding by using an extruder to obtain a molding material;

s4, putting the molding material obtained in the step S3 into a vulcanizing tank, and vulcanizing for 45-80 minutes at the temperature of 140-185 ℃ and under the pressure of 0.6-0.7 Mpa;

s5, cutting the molding material subjected to vulcanization treatment in the step S4 into pipe fittings with proper lengths;

s6, adopting a shaft core penetrating device to penetrate through the shaft core with the electrified coating to obtain a primary finished product;

s7, putting the primary finished product in the step S6 into a vulcanizing tank, and vulcanizing for 120-240 minutes at normal pressure and at the temperature of 140-190 ℃;

and S8, grinding the surface of the semi-conductive colloid of the primary finished product in the step S7 by adopting a grinder to make the surface flat.

The utility model provides a preparation is as above equipment of well positive electricity developer roll, including banbury mixer and extruder, still including the automatic grinding equipment that can grind the rubber roller, automatic grinding equipment is including the support frame rotate on the support frame and install the pivot and can drive pivot pivoted drive arrangement be equipped with the disc in the pivot along the axle center direction interval of pivot the equal array of circumference has a plurality of recesses that are used for placing the axle core on the outside wall of disc, two distance between the disc is greater than the axial length of rubber roller be equipped with the transport channel in the top that lies in the disc on the support frame, the transport channel is used for placing the developer roll and carries the axle core of developer roll to the recess be equipped with the cowl who sets up with the axle center with the disc on the support frame, cowl sets up in the outside of disc and is used for restricting the axle core in the recess one side that lies in cowl on the support frame is equipped with the grinding device that can grind the rubber roller.

Further, grinding device is including setting up bedplate on the support frame be equipped with first fixed plate on the bedplate be equipped with the abrasive band machine that can grind the rubber roll on the first fixed plate.

Furthermore, the abrasive belt machine comprises a driven wheel and a driving wheel which are arranged at an upper interval and a lower interval, an abrasive belt is sleeved between the driven wheel and the driving wheel, one end of the driving wheel is connected with a first motor, and a tension adjusting device capable of adjusting the tension of the abrasive belt is further arranged on the seat plate.

Furthermore, rate of tension adjusting device is including setting up second fixed plate and the third fixed plate on the bedplate the movable rod is worn to be equipped with at the interval on the second fixed plate, two the one end of movable rod is rotated and is connected with the roll axis, the roll axis set up in the abrasive band and with the abrasive band cooperation, two the other end of movable rod is connected with the connecting plate, still including first bolt and first nut, first bolt passes connecting plate, third fixed plate and first nut screw-thread fit in proper order.

Further, the support frame is symmetrically provided with guide grooves, the seat plate is arranged in the guide grooves in a sliding mode, an extension block is arranged on the seat plate above the corresponding guide grooves, a second bolt penetrates through the extension block and the guide grooves, and the second bolt penetrates through the extension block and the guide grooves in sequence and is in threaded fit with a second nut.

Further, drive arrangement is the second motor support frame one side is equipped with the motor mounting panel, the second motor is installed on the motor mounting panel, be equipped with the strengthening rib between motor mounting panel and the support frame.

And furthermore, a conical guide hopper is arranged at the upper end of the conveying channel.

Further, an electric roller conveyor is arranged below the two disks.

In conclusion, the invention has the beneficial effects that: only need place the developer roll that needs to grind in the transfer chute way, rotation through the disc, make the axle core of the developer roll of lower extreme drop to the recess in the transfer chute way, and by cowl's setting, make the axle core keep in the recess, the rotation through the disc makes the rubber roller remove to grinding device afterwards, grind work to the rubber roller by grinding device, when the axle core breaks away from cowl at last, the developer roll down drops because of the dead weight, thereby realize the automation of grinding the rubber roller, need not artifical the grinding, the security is improved, and the efficiency of work is improved.

The invention utilizes the characteristic that the ethylene propylene diene monomer is nonpolar rubber, and the ethylene propylene diene monomer is a polymer material with the weakest molecular polarity in the nonpolar rubber, is particularly suitable for the development of positive carbon powder, has the printing chromaticity reaching 1.5 and can solve the problem of printing double images; the development roller production cost can be reduced by utilizing the characteristic that the ethylene propylene diene monomer rubber can be filled with high filling.

Drawings

FIG. 1 is a schematic perspective view of the apparatus of the present invention.

Fig. 2 is a schematic front view of the apparatus of the present invention.

FIG. 3 is a schematic top view of the apparatus of the present invention.

FIG. 4 isbase:Sub>A schematic cross-sectional view taken at A-A of FIG. 3 according to the present invention.

FIG. 5 is a partial schematic view of the present invention.

Description of reference numerals: 97. a developing roller; 98. a rubber roller; 99. a shaft core; 2. a support frame; 3. a rotating shaft; 4. a disc; 5. a groove; 6. a delivery channel; 7. an arc-shaped baffle plate; 8. a polishing device; 41. a seat plate; 42. a first fixing plate; 43. an abrasive belt machine; 44. a driven wheel; 45. a driving wheel; 46. an abrasive belt; 47. a first motor; 61. a second fixing plate; 67. a third fixing plate; 62. a movable rod; 63. a roll axis; 64. a connecting plate; 65. a first bolt; 66. a first nut; 71. a guide groove; 72. an extension block; 73. a second bolt; 74. a second nut; 81. a second motor; 82. a motor mounting plate; 91. a conical guide hopper; 101. provided is a motorized roller conveyor.

Detailed Description

The following detailed description provides many different embodiments or examples for implementing the invention. Of course, these are merely embodiments or examples and are not intended to be limiting. In addition, repeated reference numbers, such as repeated numbers and/or letters, may be used in various embodiments. These iterations are for simplicity and clarity of describing the present invention and are not intended to represent a particular relationship between the various embodiments and/or configurations discussed.

Furthermore, spatially relative terms, such as "under" 823030 "," below "," underside "," inside-out "," above "," upper "and the like, may be used herein to facilitate describing the relationship of one element or feature to another element or feature in the drawings and may encompass different orientations of the device in use or operation and the orientation depicted in the drawings. The devices may be rotated 90 degrees or other orientations from different orientations and the spatially relative descriptors used therein should be interpreted as such and are not to be construed as limiting the invention, and the terms "first" and "second" are used for descriptive purposes only and are not intended to indicate or imply relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The invention is further described in the following figures and detailed description: as shown in fig. 1 to 5, an apparatus for preparing a positive charge developing roller comprises an internal mixer and an extruder, and further comprises an automatic grinding apparatus capable of grinding a rubber roller 98, wherein the automatic grinding apparatus comprises a support frame 2, a rotating shaft 3 and a driving device capable of driving the rotating shaft 3 to rotate are rotatably mounted on the support frame 2, disks 4 are arranged on the rotating shaft 3 at intervals along the axial direction of the rotating shaft 3, a plurality of grooves 5 for placing a shaft core 99 are uniformly distributed and arrayed along the circumference on the outer side wall surface of each disk 4, the distance between the two disks 4 is greater than the axial length of the rubber roller 98, a conveying channel 6 is arranged on the support frame 2 above the disks 4, the conveying channel 6 is used for placing the developing roller 97 and conveying the shaft core 99 of the developing roller 97 into the grooves 5, a tapered guide hopper 91 is arranged at the upper end of the conveying channel 6, the support frame 2 is provided with an arc baffle 7 which is coaxially arranged with the disc 4, the arc baffle 7 is arranged on the outer side of the disc 4 and used for limiting the shaft core 99 in the groove 5, one side of the support frame 2 positioned on the arc baffle 7 is provided with a grinding device 8 which can grind the rubber roller 98, the developing roller 97 which needs to be ground is only needed to be placed in the conveying channel 6 from the conical guide hopper 91, the driving device works to drive the rotating shaft 3 and the disc 4 to rotate, so that the shaft core 99 of the developing roller 97 at the lowest end in the conveying channel 6 drops into the groove 5, the developing rollers 97 drop into the groove 5 one by one, the shaft core 99 is kept in the groove 5 by the arrangement of the arc baffle 7, then the rubber roller 98 moves to the grinding device 8 by the rotation of the disc 4, the grinding device 8 grinds the rubber roller 98, finally, when the shaft core 99 is separated from the arc baffle 7, the developing roller 97 drops downwards due to self weight, so that the rubber roller 98 is automatically ground without manual grinding, the safety is improved, and the working efficiency is improved.

Referring to fig. 1 and 4, the grinding device 8 includes a seat plate 41 disposed on the support frame 2, a first fixing plate 42 is disposed on the seat plate 41, an abrasive belt machine 43 capable of grinding the rubber roller 98 is disposed on the first fixing plate 42, the abrasive belt machine 43 includes a driven wheel 44 and a driving wheel 45 disposed at an interval from top to bottom, an abrasive belt 46 is sleeved between the driven wheel 44 and the driving wheel 45, one end of the driving wheel 45 is connected with a first motor 47, a tightness adjusting device capable of adjusting the tightness of the abrasive belt 46 is further disposed on the seat plate 41, the abrasive belt 46 is contacted with the rubber roller 98 to grind the rubber roller 98, and a shaft core 99 is capable of rotating in the groove 5, so that the rotation of the abrasive belt 46 can drive the rubber roller 98 to rotate while grinding the rubber roller 98, thereby driving the purpose of grinding.

Referring to fig. 1, 2 and 4, the tightness adjusting device includes a second fixing plate 61 and a third fixing plate 67 which are arranged on the seat plate 41, movable rods 62 are arranged on the second fixing plate 61 at intervals, a rolling shaft 63 is rotatably connected to one end of each of the two movable rods 62, the rolling shaft 63 is arranged in the abrasive belt 46 and is matched with the abrasive belt 46, a connecting plate 64 is connected to the other end of each of the two movable rods 62, a first bolt 65 and a first nut 66 are further included, the first bolt 65 sequentially passes through the connecting plate 64 and the third fixing plate 67 and is in threaded fit with the first nut 66, and the rolling shaft 63 on the movable rods 62 can be driven to move through the matching of the first bolt 65 and the first nut 66, so that the tightness of the abrasive belt 46 can be adjusted.

Referring to fig. 1 and 2, the support frame 2 is symmetrically provided with guide grooves 71, the seat plate 41 is slidably disposed in the guide grooves 71, an extension block 72 is disposed on the seat plate 41 above the guide grooves 71, a second bolt 73 is disposed on the extension block 72 in a penetrating manner, the second bolt 73 sequentially penetrates through the extension block 72 and the guide grooves 71 and is in threaded fit with a second nut 74, and the distance between the abrasive belt 46 and the disc 4 can be adjusted through the slidable disposition of the seat plate 41, so that the abrasive belt can be adapted to grinding rubber rollers 98 of different sizes, and the practicability is higher.

Referring to fig. 1 to 4, the driving device is a second motor 81, a motor mounting plate 82 is arranged on one side of the support frame 2, the second motor 81 is mounted on the motor mounting plate 82, a reinforcing rib is arranged between the motor mounting plate 82 and the support frame 2, an electric roller conveyor 101 is arranged below the two disks 4, and the ground developing roller 97 falls on the electric roller conveyor 101 through self weight, so that automation is realized.

The specific working principle of the device of the invention is as follows:

the developing roller 97 to be polished is placed in the conveying channel 6 from the conical guide hopper 91, the rotating shaft 3 and the disc 4 are driven to rotate through the work of the driving device, the shaft core 99 of the developing roller 97 at the lowest end in the conveying channel 6 drops into the groove 5, the developing roller 97 drops into the groove 5 one by one, the shaft core 99 is kept in the groove 5 through the arrangement of the arc-shaped baffle 7, the rubber roller 98 moves to the abrasive belt machine 43 through the rotation of the disc 4, the abrasive belt 46 grinds the rubber roller 98, the disc 4 continues to rotate, and finally when the shaft core 99 is separated from the arc-shaped baffle 7, the developing roller 97 drops on the electric roller conveyor 101 downwards due to dead weight, so that the automation of grinding the rubber roller 98 is realized, manual grinding is not needed, the safety is improved, and the working efficiency is improved.

Example 1

The utility model provides a laser printer positive electricity developer roll, including the semi-conductive colloid, wear to be equipped with electrified cladding layer axle center in semi-conductive colloid axle center department, the semi-conductive colloid is including by weight: 80 parts of ethylene propylene diene monomer 6950C,1 part of zinc oxide, 0.1 part of stearic acid SA-1801, 30 parts of N550 carbon black, 40 parts of paraffin oil, 3 parts of superconducting carbon black, 1 part of ethylene propylene diene monomer composite accelerator EG3A,0.5 part of sulfur, 0.01 part of fumed silica, 10 parts of styrene-butadiene rubber and 1 part of calcium carbonate.

Example 2

The utility model provides a laser printer positive electricity developer roll, including the semiconduction colloid wear to be equipped with electrified cladding layer axle center department in semiconduction colloid axle center, the semiconduction colloid is including according to part by weight: 120 parts of ethylene propylene diene monomer 6950C,9 parts of zinc oxide, 2 parts of stearic acid SA-1801, 80 parts of N550 carbon black, 80 parts of paraffin oil, 10 parts of superconducting carbon black, 8 parts of ethylene propylene diene monomer composite accelerator EG3A,3 parts of sulfur, 0.5 part of fumed silica, 30 parts of styrene-butadiene rubber and 5 parts of calcium carbonate.

Example 3

The utility model provides a laser printer positive electricity developer roll, including the semiconduction colloid wear to be equipped with electrified cladding layer axle center department in semiconduction colloid axle center, the semiconduction colloid is including according to part by weight: 100 parts of ethylene propylene diene monomer 6950C,4 parts of zinc oxide, 1 part of stearic acid SA-1801, 50 parts of N550 carbon black, 60 parts of paraffin oil, 5 parts of superconducting carbon black, 3 parts of ethylene propylene diene monomer composite accelerator EG3A,1 part of sulfur, 0.2 part of fumed silica, 20 parts of styrene-butadiene rubber and 2 parts of calcium carbonate.

Example 4

The utility model provides a laser printer positive electricity developer roll, including the semiconduction colloid wear to be equipped with electrified cladding layer axle center department in semiconduction colloid axle center, the semiconduction colloid is including according to part by weight: 120 parts of ethylene propylene diene monomer rubber 6950C,1 part of zinc oxide, 2 parts of stearic acid SA-1801, 80 parts of N550 carbon black, 80 parts of paraffin oil, 10 parts of superconducting carbon black, 8 parts of ethylene propylene diene monomer composite accelerator EG3A,0.5 part of sulfur, 0.01 part of fumed silica, 30 parts of styrene-butadiene rubber and 5 parts of calcium carbonate.

Example 5

The utility model provides a laser printer positive electricity developer roll, including the semi-conductive colloid, wear to be equipped with electrified cladding layer axle center in semi-conductive colloid axle center department, the semi-conductive colloid is including by weight: 120 parts of ethylene propylene diene monomer rubber 6950C,9 parts of zinc oxide, 0.1 part of stearic acid SA-1801, 80 parts of N550 carbon black, 80 parts of paraffin oil, 10 parts of superconducting carbon black, 8 parts of ethylene propylene diene monomer composite accelerator EG3A,3 parts of sulfur, 0.01 part of fumed silica, 30 parts of styrene-butadiene rubber and 1 part of calcium carbonate.

The positive charge developing roller of the laser printer described in examples 1-5 of the present invention can be prepared by any of the methods of examples 6-8.

Example 6

A preparation method of a laser printer positive electricity developing roller is characterized by comprising the following steps:

s2, filtering the banburying mixture in the step S1 by a rubber filter, and standing for 24 hours;

s4, putting the molding material obtained in the step S3 into a vulcanizing tank, and vulcanizing for 45 minutes under 0.6Mpa at 140 ℃;

s7, putting the primary finished product in the step S6 into a vulcanizing tank, and vulcanizing at normal pressure and 140 ℃ for 120 minutes;

Example 7

s2, filtering the banburying mixture in the step S1 by using a rubber filter, and standing for 72 hours;

s3, putting the banburying mixture in the step S2 into an open mill, adding sulfur, and performing extrusion molding by using an extruder to obtain a molding material;

s4, putting the molding material obtained in the step S3 into a vulcanizing tank, and vulcanizing for 80 minutes at 0.7Mpa and 185 ℃;

s7, putting the primary finished product in the step S6 into a vulcanizing tank, and vulcanizing at the normal pressure and 190 ℃ for 240 minutes;

Example 8

The preparation method of the positive electricity developing roller of the laser printer is characterized by comprising the following steps:

s2, filtering the banburying mixture in the step S1 by a rubber filter, and standing for 48 hours;

s4, putting the molding material obtained in the step S3 into a vulcanizing tank, and vulcanizing for 60 minutes at 0.65Mpa and 160 ℃;

s7, placing the primary finished product in the step S6 into a vulcanizing tank, and vulcanizing for 180 minutes at the normal pressure and the temperature of 170 ℃;

While there have been shown and described the fundamental principles and principal features of the invention and advantages thereof with reference to the drawings, it will be understood by those skilled in the art that the invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an equipment for preparing laser printer positive electricity developer roll, wherein, laser printer positive electricity developer roll is including the semiconduction colloid, wear to be equipped with electrified cladding layer axle center in semiconduction colloid axle center department, the semiconduction colloid is including according to part by weight: 80-120 parts of ethylene propylene diene monomer 6950C,1-9 parts of zinc oxide, 0.1-2 parts of stearic acid SA-1801, 30-80 parts of N550 carbon black, 40-80 parts of paraffin oil, 3-10 parts of superconducting carbon black, 1-8 parts of ethylene propylene diene monomer composite accelerator EG3A,0.5-3 parts of sulfur, 0.01-0.5 part of fumed silica, 10-30 parts of styrene-butadiene rubber and 1-5 parts of calcium carbonate;

the equipment comprises an internal mixer, a rubber filter, an open mill, a vulcanizing tank, an extruder, a cutting machine and a shaft core penetrating device, and is characterized in that: the automatic grinding device comprises a support frame (2), a rotating shaft (3) and a driving device capable of driving the rotating shaft (3) to rotate are rotatably mounted on the support frame (2), disks (4) are arranged on the rotating shaft (3) at intervals along the axis direction of the rotating shaft (3), a plurality of grooves (5) used for placing a shaft core (99) are uniformly distributed and arrayed on the outer side wall surface of each disk (4) along the circumference, the distance between the two disks (4) is greater than the axial length of the rubber roller (98), a conveying channel (6) is arranged above the disk (4) on the support frame (2), the conveying channel (6) is used for placing a developing roller (97) and conveying the shaft core (99) of the developing roller (97) to the grooves (5), an arc baffle (7) coaxially arranged with the disk (4) is arranged on the support frame (2), the arc baffle (7) is arranged on the outer side of the disk (4) and used for limiting the shaft core (99) of the developing roller (97) to be arranged in the grooves (5), and a grinding device capable of grinding the rubber roller (8) on one side of the support frame (2) is arranged on the support frame (2);

the grinding device (8) comprises a seat plate (41) arranged on the support frame (2), a first fixing plate (42) is arranged on the seat plate (41), and an abrasive belt machine (43) capable of grinding a rubber roller (98) is arranged on the first fixing plate (42);

the belt sander (43) comprises a driven wheel (44) and a driving wheel (45) which are arranged at intervals up and down, an abrasive belt (46) is sleeved between the driven wheel (44) and the driving wheel (45), one end of the driving wheel (45) is connected with a first motor (47), and a tension adjusting device capable of adjusting the tension of the abrasive belt (46) is further arranged on the seat plate (41);

the tightness adjusting device comprises a second fixing plate (61) and a third fixing plate (67) which are arranged on a seat plate (41), movable rods (62) penetrate through the second fixing plate (61) at intervals, one ends of the two movable rods (62) are rotatably connected with rolling shafts (63), the rolling shafts (63) are arranged in an abrasive belt (46) and matched with the abrasive belt (46), the other ends of the two movable rods (62) are connected with connecting plates (64), the tightness adjusting device further comprises first bolts (65) and first nuts (66), and the first bolts (65) sequentially penetrate through the connecting plates (64), the third fixing plate (67) and the first nuts (66) to be in threaded fit;

guide grooves (71) are symmetrically formed in the support frame (2), the seat plate (41) is arranged in the guide grooves (71) in a sliding mode, an extending block (72) is arranged on the seat plate (41) above the guide grooves (71), a second bolt (73) penetrates through the extending block (72), the guide grooves (71) and a second nut (74) in a threaded fit mode, and the second bolt (73) penetrates through the extending block (72) and the guide grooves (71) in sequence;

the driving device is a second motor (81), a motor mounting plate (82) is arranged on one side of the support frame (2), the second motor (81) is mounted on the motor mounting plate (82), and a reinforcing rib is arranged between the motor mounting plate (82) and the support frame (2);

a conical guide hopper (91) is arranged at the upper end of the conveying channel (6);

an electric roller conveyor (101) is arranged below the two discs (4);

the preparation method comprises the following steps:

s2, filtering the banburying mixture in the step S1 by a rubber filter, and standing for 24-72 hours;

s4, putting the molding material obtained in the step S3 into a vulcanizing tank, and vulcanizing for 45-80 minutes under the pressure of 0.6-0.7MPa and at the temperature of 140-185 ℃;

s5, cutting the molding material subjected to vulcanization treatment in the step S4 into pipe fittings with proper length;

s7, putting the primary finished product in the step S6 into a vulcanizing tank, and vulcanizing at normal pressure and 140-190 ℃ for 120-240 minutes;