CN213000938U

CN213000938U - Automatic glue spreader for hollow glass aluminum frame

Info

Publication number: CN213000938U
Application number: CN202021856202.3U
Authority: CN
Inventors: 张永隆; 张静; 张连梅
Original assignee: Hubei Hanyu Building Materials Technology Co ltd
Current assignee: Hubei Hanyu Building Materials Technology Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-04-20
Anticipated expiration: 2030-08-31

Abstract

The utility model relates to a cavity glass processing technology field discloses a cavity glass aluminium frame automatic gluing machine, including the frame, along the conveyer belt that frame length direction set up and be located the rubber coating device of conveyer belt both sides, the rubber coating device includes fixed rubber coating subassembly and follows the perpendicular to the activity rubber coating subassembly that conveyer belt direction of delivery removed, fixed rubber coating subassembly both sides are provided with closing device, frame one side is equipped with and is used for supporting the aluminium frame and drives rotatory strutting arrangement and the drive arrangement of aluminium frame, drive arrangement is used for the drive strutting arrangement follows conveyer belt direction of delivery reciprocating motion. The utility model provides an automatic spreading machine of cavity glass aluminium frame is rational in infrastructure, convenient to use, improves rubber coating efficiency, reduces artifical intensity of labour, practices thrift the manpower.

Description

Automatic glue spreader for hollow glass aluminum frame

Technical Field

The utility model relates to a cavity glass processing technology field, in particular to automatic spreading machine of cavity glass aluminium frame.

Background

The hollow glass has good sound insulation and heat insulation effects, is beautiful and practical, and is widely applied to buildings, doors and windows. The hollow glass is generally made by bonding two or three sheets of glass with an aluminum alloy frame containing a drying agent by using a high-strength high-airtightness composite bonding agent.

The prior publication No. CN210632398U, Chinese utility model patent with patent name "butyl rubber coating machine for aluminum frame" discloses a butyl rubber coating machine for aluminum frame, which comprises a frame, wherein a rubber coating groove is arranged on the frame, a rubber coating mechanism is arranged at the inner side of the rubber coating groove, and a conveying mechanism extending along the rubber coating groove is arranged at the bottom of the rubber coating groove; and the clamping reversing mechanism is arranged on the rack and can move along the extending direction of the glue coating groove, the clamping reversing mechanism comprises a base, a liftable support plate is arranged on the base, an clamp plate is matched on the support plate in a rotating mode, clamps are arranged at two ends of the clamp plate and are located right above the glue coating groove, and the two clamps are respectively used for clamping two vertical edges opposite to the aluminum frame.

The prior art has the following defects: a butyl rubber coating machine for aluminium frame though can normally realize the coating work to the aluminium frame, but at the rubber coating in-process, accomplish the rubber coating back on one side when the aluminium frame, the aluminium frame leaves the rubber coating groove, the anchor clamps board rotates 180 and drives the aluminium frame reversal, then make the aluminium frame remove to the rubber coating groove initiating end along the slip table again and carry out the rubber coating, after the rubber coating of relative both sides about the aluminium frame is accomplished, take off the aluminium frame again, manual operation makes aluminium frame reversal 90 manually, pass through the anchor clamps centre gripping again, again to the rubber coating of both sides about the aluminium frame. The workman is carrying out the upset in-process to the aluminium frame and is scraping easily and rub the butyl rubber that has scribbled, influences cavity glass's leakproofness, has so not only increased workman's work load, has wasted the manpower, has reduced the rubber coating efficiency of aluminium frame, when the aluminium frame is great moreover, has also increased the degree of difficulty of upset.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at overcoming prior art's defect, provide a cavity glass aluminium frame automatic gluing machine rational in infrastructure, convenient to use, have the advantage that the rubber coating is efficient, automatic operation, reduction artifical intensity of labour, saving the manpower.

The utility model discloses a realize that technical scheme that technical purpose adopted is: the utility model provides an automatic spreading machine of cavity glass aluminium frame, includes the frame, follows the conveyer belt that frame length direction set up and is located the rubber coating device of conveyer belt both sides, the rubber coating device is including fixed rubber coating subassembly and along the perpendicular to the activity rubber coating subassembly that conveyer belt direction of delivery removed, fixed rubber coating subassembly both sides are provided with closing device, frame one side is equipped with and is used for supporting the aluminium frame and drives rotatory strutting arrangement and the drive arrangement of aluminium frame, drive arrangement is used for the drive strutting arrangement is followed conveyer belt direction of delivery reciprocating motion.

By adopting the technical scheme, the aluminum frame is placed on the conveying belt, the bottom of the aluminum frame is attached to the conveying belt, the supporting device is used for supporting and fixing the aluminum frame, the aluminum frame is in a vertical state and is vertical to the conveying belt, then the conveying belt and the supporting device are driven to move synchronously with the aluminum frame, when the aluminum frame moves to the gluing device through the conveying belt, the aluminum frame is always in a vertical state with the conveying belt, when the aluminum frame moves to the gluing device, the pressing device presses the aluminum frame on the conveying belt, the gluing device is used for gluing the edges of the aluminum frame, after one edge of the aluminum frame is glued, the supporting device rotates to drive the aluminum frame to rotate 90 degrees, and the steps are repeated until all four edges of the aluminum frame are glued. Compare artifical rubber coating, through rubber coating device, conveyer belt, strutting arrangement and drive arrangement's cooperation, improved rubber coated efficiency, reduced workman's intensity of labour, use manpower sparingly.

As a further setting of the utility model, be located in the frame the below of activity rubber coating subassembly is equipped with the spout, the spout is along the perpendicular to conveyer belt direction of delivery sets up, activity rubber coating subassembly bottom through the slide with the spout slides and connects, be equipped with the pneumatic cylinder in the spout, the tailpiece of the piston rod of pneumatic cylinder with slide fixed connection.

As a further setting of the utility model, closing device is including fixing base, connecting rod and cylinder in the frame, the connecting rod is "L" shape, connecting rod one end with the base front end is articulated, and the other end rotates and is connected with the pinch roller, the cylinder rotate connect in the base rear end, the tailpiece of the piston rod of cylinder pass through the connector with the connecting rod department of buckling is articulated.

As the utility model discloses a further setting, strutting arrangement includes horizontal spliced pole, locates first driving motor in the spliced pole, the circular shape connecting seat of being connected with first driving motor and a plurality of support cylinder of locating on the connecting seat, first driving motor is used for the drive the connecting seat is rotatory, the tailpiece of the piston rod of support cylinder is connected with the roof that is used for supporting the aluminium frame, the cladding of roof surface has rubber.

As a further setting of the utility model, the support cylinder has 4, and is "ten" font evenly distributed and is in on the circumference of connecting seat.

As the utility model discloses a further setting, drive arrangement includes guide rail, second driving motor, supporting seat and locates the jacking cylinder on the supporting seat, the guide rail is followed conveyer belt direction of delivery sets up, the supporting seat bottom be equipped with guide rail sliding connection's gyro wheel, second driving motor is used for the drive the gyro wheel is followed the guide rail slides, the tailpiece of the piston rod of jacking cylinder with spliced pole bottom fixed connection.

As a further setting of the utility model, one side that closing device is close to the feed end is equipped with photoelectric sensor, frame one side is equipped with the controller, the controller with the pneumatic cylinder the cylinder photoelectric sensor first driving motor support the cylinder second driving motor with the equal electricity of jacking cylinder is connected.

As a further setup of the utility model, the fixed gluing assembly and the movable gluing assembly are all including gluing the box and gluing the mouth, glue the mouth and fix glue on the preceding terminal surface of the box.

As a further setting of the utility model, the both sides that the conveyer belt is close to the feed end are equipped with spacing.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the method comprises the steps of placing an aluminum frame on a conveying belt, enabling the bottom of the aluminum frame to be attached to the conveying belt, supporting and fixing the aluminum frame through a supporting device, enabling the aluminum frame to be in a vertical state and to be perpendicular to the conveying belt, then driving the conveying belt and the supporting device, enabling the supporting device and the aluminum frame to keep synchronous motion, enabling the aluminum frame to be always in a state perpendicular to the conveying belt when the aluminum frame moves to a gluing device through the conveying belt, enabling a pressing device to press the aluminum frame onto the conveying belt when the aluminum frame moves to the gluing device, enabling the gluing device to glue the edges of the aluminum frame, driving a connecting seat to rotate through a first driving motor after gluing of one edge of the aluminum frame is completed, driving the aluminum frame to rotate 90 degrees through a supporting cylinder, avoiding taking down the aluminum frame for re-installation, further improving automation, and repeating the steps until all gluing of four edges. Compare artifical rubber coating, through rubber coating device, conveyer belt, strutting arrangement and drive arrangement's cooperation, improved rubber coated efficiency, reduced workman's intensity of labour, use manpower sparingly.

2. The movable gluing component is provided with a chute vertical to the conveying direction of the conveying belt, and the movable gluing component can move along the chute by being driven by a hydraulic cylinder in the chute, so that the distance between the movable gluing component and the fixed gluing component can be adjusted, the requirement for gluing the aluminum frames with different widths can be met, the operation is convenient, the practical range is wide, and the adjustment is flexible.

3. The connecting rod is "L" shape, one end is articulated with the base front end, the other end rotates and connects the pinch roller, the cylinder rotates with the base rear end to be connected, and the tailpiece of the piston rod passes through the connector and articulates with the department of buckling of connecting rod, when aluminium frame when the rubber coating device, cylinder drive connecting rod drives the pinch roller and presses on aluminium frame, after aluminium frame rubber coating is accomplished, cylinder drive connecting rod makes the pinch roller lift up rapidly, the cylinder rotates to be connected and is connected on the connecting rod for the piston rod rotation of cooperation cylinder, make the cylinder not only can realize original single linear motion, can also adapt to the dislocation motion change, when the connecting rod rotates to operating position, do not influence the normal operation of cylinder, the pinch roller makes the aluminium frame not influenced by the inertial force when the conveyer belt moves, can steadily carry, make the rubber coating.

4. First driving motor drive connecting seat is rotatory, evenly distributed has 4 support cylinder that are "ten" font setting on the circumference of connecting seat, and support cylinder's tailpiece of the piston rod is connected with the roof, can be from four directions about from top to bottom support fixed aluminium frame, make aluminium frame remain throughout with conveyer belt vertically state, the rubber coating of being convenient for, roof surface cladding has rubber, can increase the frictional force between roof and the aluminium frame, avoid aluminium frame aversion or pine take off at transport or rubber coating in-process, can also play certain guard action to aluminium frame simultaneously, avoid causing wearing and tearing to aluminium frame, 4 support cylinder's setting, be convenient for according to the shrink of the size automatically regulated piston rod of aluminium frame, make strutting arrangement can adapt to the support of not unidimensional aluminium frame fixed, strutting arrangement's practicality has been improved.

5. The piston rod end of the jacking cylinder is connected with the supporting device through the connecting column, after the gluing of one side of the aluminum frame is completed, the jacking cylinder drives the connecting column to ascend, so that the supporting device and the aluminum frame are driven to ascend synchronously, the aluminum frame is driven to rotate through the supporting device, and the aluminum frame can be prevented from being damaged due to collision with the rack or a conveying belt during overturning.

6. One side that closing device is close to the feed end is equipped with photoelectric sensor, and frame one side still is provided with the controller, and when photoelectric sensor sensed aluminium frame through-put, start closing device through the controller and compress tightly the aluminium frame, start the rubber coating device simultaneously and carry out the rubber coating to the aluminium frame, through controller and photoelectric sensor's cooperation, further improved rubber coated automation mechanized operation, convenient and fast.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of an automatic glue spreader for hollow glass aluminum frames;

FIG. 2 is a schematic structural diagram of a pressing device of an automatic glue spreader for hollow glass aluminum frames;

FIG. 3 is a schematic structural diagram of a supporting device of an automatic glue spreader for hollow glass aluminum frames;

FIG. 4 is a schematic structural diagram of a fixing and gluing assembly of an automatic gluing machine for hollow glass aluminum frames.

In the figure, 1, a frame; 2. a conveying belt 21 and a limiting strip; 3. the gluing device 31, the fixed gluing component 32, the movable gluing component 33, the glue box 34 and the glue nozzle; 4. a sliding chute 41, a sliding seat 42 and a hydraulic cylinder; 5. the device comprises a pressing device 51, a base 52, a connecting rod 53, an air cylinder 54 and a pressing wheel; 6. the supporting device comprises a supporting device body 61, a connecting column 62, a first driving motor 63, a connecting seat 64, a supporting cylinder 65 and a top plate; 7. the device comprises a driving device 71, a guide rail 72, a supporting seat 73, a jacking cylinder 74 and a roller; 8. a photosensor; 9. and a controller.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the specific embodiments. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, the utility model provides an automatic spreading machine for hollow glass aluminum frame, which comprises a frame 1, a conveyer belt 2 arranged along the length direction of the frame 1 and a spreading device 3 arranged at the two sides of the conveyer belt 2, wherein the spreading device 3 comprises a fixed spreading component 31 and a movable spreading component 32 moving along the direction perpendicular to the conveying direction of the conveyer belt 2, two sides of the fixed spreading component 31 are provided with a pressing device 5, one side of the frame 1 is provided with a supporting device 6 and a driving device 7 for supporting the aluminum frame and driving the aluminum frame to rotate, the driving device 7 is used for driving the supporting device 6 to reciprocate along the conveying direction of the conveyer belt 2, two ends of the frame 1 are provided with a conveying wheel, the conveyer belt 2 is sleeved on the conveying wheel, the conveying wheel is driven by a motor to rotate so as to drive the conveyer belt 2 to do circular motion, the conveying of the aluminum frame is realized, the aluminum frame can be glued. The aluminum frame is placed on the conveying belt 2, the bottom of the aluminum frame is attached to the conveying belt 2, the supporting device 6 is used for supporting and fixing the aluminum frame, the aluminum frame is in a vertical state and is perpendicular to the conveying belt 2, then the supporting device 6 is driven to move in the conveying direction of the conveying belt 2, the supporting device 6 and the aluminum frame are enabled to move synchronously, when the aluminum frame moves to the gluing device 3 through the conveying belt 2, the aluminum frame is always in a perpendicular state with the conveying belt 2, when the aluminum frame moves to the gluing device 3, the pressing device 5 presses the aluminum frame onto the conveying belt 2, the gluing device 3 is used for gluing the edges of the aluminum frame, after one edge of the aluminum frame is glued, the supporting device 6 is used for driving the aluminum frame to rotate 90 degrees, the aluminum frame is prevented from being taken down and remounted, automation is further improved, and the steps are repeated until all four edges of the aluminum frame. Compare artifical rubber coating, through rubber coating device 3, conveyer belt 2, strutting arrangement 6 and drive arrangement 7's cooperation, improved rubber coated efficiency, reduced workman's intensity of labour, use manpower sparingly.

Referring to fig. 1, the below that lies in activity rubber coating subassembly 32 on frame 1 is equipped with spout 4, spout 4 sets up along the 2 direction of delivery of perpendicular to conveyer belt, activity rubber coating subassembly 32 bottom slides through slide 41 and spout 4 and is connected, be equipped with pneumatic cylinder 42 in the spout 4, the tailpiece of the piston rod and slide 41 fixed connection of pneumatic cylinder 42, drive through pneumatic cylinder 42 in the spout 4, can make activity rubber coating subassembly 32 remove along spout 4, thereby adjust the distance between activity rubber coating subassembly 32 and the fixed rubber coating subassembly 31, the adaptation carries out the rubber coating demand to the aluminium frame of different width, and the operation is convenient, the practical range is wide, and the regulation is nimble.

Referring to fig. 1 and 2, the pressing device 5 includes a base 51 fixed on the frame 1, a connecting rod 52 and a cylinder 53, the connecting rod 52 is "L" shaped, one end of the connecting rod 52 is hinged to the front end of the base 51, the other end is rotatably connected to a pressing wheel 54, the cylinder 53 is rotatably connected to the rear end of the base 51, the piston rod end of the cylinder 53 is hinged to the bending part of the connecting rod 52 through a connector, when the aluminum frame passes through the glue coating device 3, the cylinder 53 drives the connecting rod 52 to drive the pressing wheel 54 to press on the aluminum frame, after the glue coating on the aluminum frame is completed, the cylinder 53 drives the connecting rod 52 to rapidly lift the pressing wheel 54, the cylinder 53 is rotatably connected to the connecting rod 52 in order to cooperate with the piston rod of the cylinder 53 to rotatably connect, so that the cylinder 53 can not only realize the original single linear motion, but also can adapt to the dislocation, the pinch roller 54 prevents the aluminum frame from being influenced by the inertia force when the conveying belt 2 runs, and can stably convey the aluminum frame, so that the gluing effect is better.

Referring to fig. 1 and 3, the supporting device 6 includes a horizontal connecting column 61, a first driving motor 62 disposed in the connecting column 61, a circular connecting seat 63 connected with the first driving motor 62, and a plurality of supporting cylinders 64 disposed on the connecting seat 63, the first driving motor 62 is used for driving the connecting seat 63 to rotate, the piston rod end of the supporting cylinder 64 is connected with a top plate 65 for supporting the aluminum frame, the outer surface of the top plate 65 is coated with rubber, the number of the supporting cylinders 64 is 4, and the supporting cylinders are uniformly distributed on the circumference of the connecting seat 63 in a cross shape, the aluminum frame is supported and fixed by the supporting cylinders 64 from the upper, lower, left and right directions, so that the aluminum frame is always kept in a state perpendicular to the conveying belt 2, which is convenient for gluing, the outer surface of the top plate 65 is coated with rubber, which can increase the friction between the top plate 65 and the aluminum frame, avoid the aluminum frame from shifting or loosening during the conveying, avoid causing wearing and tearing to the aluminium frame, 4 support cylinder 64's setting is convenient for according to the shrink of the size automatically regulated piston rod of aluminium frame for strutting arrangement 6 can adapt to the support of not unidimensional aluminium frame fixedly, has improved strutting arrangement 6's practicality.

Referring to fig. 1, the driving device 7 includes a guide rail 71, a second driving motor, a support base 72 and a jacking cylinder 73 disposed on the support base 72, the guide rail 71 is disposed along the conveying direction of the conveyor belt 2, a roller 74 slidably connected to the guide rail 71 is disposed at the bottom of the support base 72, the second driving motor is used for driving the roller 74 to slide along the guide rail 71, so as to realize the reciprocating motion of the whole supporting device 6 along the conveying direction of the conveyor belt 2, so that the supporting device 6 and the aluminum frame can keep synchronous motion, a piston rod end of the jacking cylinder 73 is fixedly connected to the bottom of the connecting column 61, after one edge of the aluminum frame is coated with glue, the jacking cylinder 73 drives the connecting column 61 to ascend, so as to drive the supporting device 6 and the aluminum frame to ascend synchronously, at this time, the first driving motor 62 drives the connecting base 63 to rotate the supporting cylinders 64 distributed on the connecting base 63, the aluminum frame is driven to rotate synchronously, so that the aluminum frame is prevented from being damaged due to collision with the rack 1 or the conveyer belt 2 when being overturned.

Referring to fig. 1, one side of the pressing device 5 close to the feeding end is provided with a photoelectric sensor 8, one side of the rack 1 is provided with a controller 9, the controller 9 is connected with a hydraulic cylinder 42, an air cylinder 53, the photoelectric sensor 8, a first driving motor 62, a supporting air cylinder 64, a second driving motor and a jacking air cylinder 73 which are electrically connected, when the photoelectric sensor 8 senses that an aluminum frame passes through, the pressing device 5 is started through the controller 9 to press the aluminum frame, meanwhile, the gluing device 3 is started to glue the aluminum frame, the photoelectric sensor 8, the gluing device 3, the pressing device 5, the supporting device 6 and the driving device 7 run in a coordinated mode through the control of the controller 9, the automatic gluing operation is further improved, and the operation is convenient and fast.

Referring to fig. 1 and 4, the fixed gluing assembly 31 and the movable gluing assembly 32 both comprise a glue box 33 and a glue nozzle 34, the glue nozzle 34 is fixed on the front end face of the glue box 33, the two sides of the conveying belt 2 close to the feeding end are provided with limiting strips 21, the arrangement of the limiting strips 21 can ensure that the aluminum frame does not deviate in the conveying process along the conveying belt 2, and the gluing quality and efficiency of the aluminum frame are improved.

Claims

1. Automatic spreading machine of cavity glass aluminium frame, its characterized in that: including frame (1), conveyer belt (2) that set up along frame (1) length direction and rubber coating device (3) that are located conveyer belt (2) both sides, rubber coating device (3) are including fixed rubber coating subassembly (31) and along the perpendicular to movable rubber coating subassembly (32) that conveyer belt (2) direction of delivery removed, fixed rubber coating subassembly (31) both sides are provided with closing device (5), frame (1) one side is equipped with and is used for supporting the aluminium frame and drives rotatory strutting arrangement (6) of aluminium frame and drive arrangement (7), drive arrangement (7) are used for the drive strutting arrangement (6) are followed conveyer belt (2) direction of delivery reciprocating motion.

2. The automatic glue spreader for hollow glass aluminum frames according to claim 1, is characterized in that: the frame (1) is located the below of activity rubber coating subassembly (32) is equipped with spout (4), the perpendicular to is followed in spout (4) conveyer belt (2) direction of delivery sets up, activity rubber coating subassembly (32) bottom through slide (41) with spout (4) are slided and are connected, be equipped with pneumatic cylinder (42) in spout (4), the tailpiece of the piston rod of pneumatic cylinder (42) with slide (41) fixed connection.

3. The automatic glue spreader for hollow glass aluminum frames according to claim 2, is characterized in that: closing device (5) are including fixing base (51), connecting rod (52) and cylinder (53) on frame (1), connecting rod (52) are "L" shape, connecting rod (52) one end with base (51) front end is articulated, and the other end rotates and is connected with pinch roller (54), cylinder (53) rotate connect in base (51) rear end, the tailpiece of the piston rod of cylinder (53) pass through the connector with connecting rod (52) department of buckling is articulated.

4. The automatic glue spreader for hollow glass aluminum frames according to claim 3, is characterized in that: strutting arrangement (6) include horizontal spliced pole (61), locate first driving motor (62) in spliced pole (61), circular shape connecting seat (63) be connected with first driving motor (62) and a plurality of support cylinder (64) of locating on connecting seat (63), first driving motor (62) are used for the drive connecting seat (63) are rotatory, the tailpiece of the piston rod of support cylinder (64) is connected with roof (65) that are used for supporting the aluminium frame, roof (65) surface cladding has rubber.

5. The automatic glue spreader for hollow glass aluminum frames according to claim 4, is characterized in that: the number of the supporting cylinders (64) is 4, and the supporting cylinders are uniformly distributed on the circumference of the connecting seat (63) in a cross shape.

6. The automatic glue spreader for hollow glass aluminum frames according to claim 5, is characterized in that: drive arrangement (7) include guide rail (71), second driving motor, supporting seat (72) and locate jacking cylinder (73) on supporting seat (72), guide rail (71) are followed conveyer belt (2) direction of delivery sets up, supporting seat (72) bottom be equipped with guide rail (71) sliding connection's gyro wheel (74), second driving motor is used for the drive gyro wheel (74) are followed guide rail (71) slide, the tailpiece of the piston rod of jacking cylinder (73) with spliced pole (61) bottom fixed connection.

7. The automatic glue spreader for hollow glass aluminum frames according to claim 6, is characterized in that: one side that closing device (5) are close to the feed end is equipped with photoelectric sensor (8), frame (1) one side is equipped with controller (9), controller (9) with pneumatic cylinder (42) cylinder (53) photoelectric sensor (8) first driving motor (62) support cylinder (64) second driving motor with jacking cylinder (73) electricity all is connected.

8. The automatic glue spreader for hollow glass aluminum frames according to claim 1, is characterized in that: the fixed gluing component (31) and the movable gluing component (32) both comprise a glue box (33) and a glue nozzle (34), and the glue nozzle (34) is fixed on the front end face of the glue box (33).

9. The automatic glue spreader for hollow glass aluminum frames according to claim 1, is characterized in that: and limiting strips (21) are arranged on two sides of the conveying belt (2) close to the feeding end.