CN220611237U - Aluminum product secondary screening machine - Google Patents

Abstract

The utility model provides an aluminum product secondary screening machine, which relates to the technical field of aluminum product production and comprises the following components: a screening box; the lower part of the screening box is fixedly connected with a connecting frame; the connecting frame is of a square-shaped block structure; four support columns are fixedly connected to the outer side of the connecting frame in a rectangular array shape; a screening cabin is arranged in the screening box; a feeding frame is fixedly connected with the center of the top end surface of the screening box; the feeding frame is aligned with the screening cabin; the upper part of the rear end face of the screening box is fixedly connected with a collecting box; the collecting box is of a rectangular box-shaped structure; two mounting frames are symmetrically and fixedly connected to the left end face of the screening box. The extrusion cam is driven to rotate by the starting driving motor, the first inserting block is driven to move by the control sliding rod, and the second inserting block is extruded to enable the screening frame to reciprocate, so that aluminum raw materials in the screening frame are evenly separated, and the problem that a large amount of aluminum raw materials enter the screening machine simultaneously and are easily accumulated in the screening machine to cause uneven screening of the aluminum raw materials is solved.

Description

Aluminum product secondary screening machine

Technical Field

The utility model relates to the technical field of aluminum product production, in particular to an aluminum product secondary screening machine.

Background

In order to guarantee the quality of finished aluminum product in the in-process of aluminum product production, the staff can divide the screen cloth to the aluminum product raw materials earlier in the in-process of production, separates out impurity wherein, in order to conveniently divide the screen cloth to the aluminum product raw materials, and the staff can use the screen cloth that divides the screen cloth usually, and current screen cloth that divides is usually by screening box and screen cloth, in the in-process of using pour the aluminum product raw materials into the screening box, divide the screen cloth to the aluminum product raw materials through a plurality of screens that set up in the screening box.

For example: the utility model discloses a screening machine for aluminum powder, which specifically comprises a machine shell, wherein a plurality of mutually parallel installation slide ways are arranged on the inner side wall of the machine shell, a plurality of screens are slidably installed on each installation slide way, the screens are spliced into a large screen, a fixing component for fixing the screens is installed on the machine shell, a vibrating motor is installed on the machine shell, one side of the machine shell is provided with a grading discharge hole, three sides of the screens are provided with protruding strips, one side of the rest of the screens is provided with a groove, and the fixing component is divided into a left end installation component and a right end installation component; a large screen is spliced through a plurality of screens, when one of the screens is worn seriously, replacement cost is reduced, the screen is conveniently replaced through the left end installation assembly and the right end installation assembly, and replacement time is reduced.

However, regarding the conventional screening machine at present, a worker usually pours a large amount of aluminum raw materials into the screening machine together for screening in the use process, but a large amount of aluminum raw materials enter the screening machine simultaneously to easily produce accumulation in the screening machine, so that the screening of the aluminum raw materials is uneven, and the screening efficiency of the aluminum raw materials is also influenced while the screening effect of the aluminum raw materials is influenced.

Disclosure of Invention

In view of the above, the utility model provides an aluminum secondary screening machine, which is provided with a screening frame capable of automatically evenly screening aluminum raw materials, wherein a driving motor is started to drive an extrusion cam to rotate, and two control slide bars are sequentially extruded in the process of rotating the extrusion cam; make two control slide bars slide in the support frame in proper order, the slip through the support frame drives first inserted block and removes, can extrude the second inserted block at the in-process that first inserted block removed and make the second inserted block drive the guide slide block and slide and drive the screening frame and remove at the screening case, can make the slide bar slide and extrude supporting spring at the screening incasement at the in-process that the screening frame removed, the screening frame can reset along with supporting spring's resilience after first inserted block resets, and then make the screening frame carry out reciprocating motion and evenly open the aluminum product raw materials in the screening frame, prevent that the aluminum product raw materials from producing and piling up on the screening frame, easy operation is swift, it is more convenient to use, the effectual sieve separation efficiency that has increased the secondary screening machine to the aluminum product raw materials that divides, the sieve mesh that has different sizes on two screening frames simultaneously can do benefit to the secondary screening to the aluminum product raw materials, further improve the screening efficiency of the secondary screening machine to the aluminum product raw materials.

The utility model provides an aluminum product secondary screening machine, which specifically comprises: a screening box; the lower part of the screening box is fixedly connected with a connecting frame; the connecting frame is of a square-shaped block structure; four support columns are fixedly connected to the outer side of the connecting frame in a rectangular array shape; a screening cabin is arranged in the screening box; a feeding frame is fixedly connected with the center of the top end surface of the screening box; the feeding frame is aligned with the screening cabin; the upper part of the rear end face of the screening box is fixedly connected with a collecting box; the collecting box is of a rectangular box-shaped structure; two mounting frames are symmetrically and fixedly connected to the left end face of the screening box; the two mounting frames are U-shaped block structures; the right end face of the screening box is fixedly connected with a supporting frame in the middle; the support frame is of a U-shaped block structure; the bottom surface of screening case fixedly connected with unloading pipe placed in middle.

Optionally, a driving motor is fastened and connected to the right end face of the support frame through bolts; the left end face of the driving motor is coaxially connected with an extrusion cam; the extrusion cam is arranged in the support frame; two control slide bars are symmetrically and slidingly connected in the support frame; the inner sides of the two control slide bars are contacted with the outer part of the extrusion cam; the outer sides of the two control slide bars are fixedly connected with a first inserting block; a group of connecting springs are fixedly connected to the inner sides of the two first inserting blocks; the tail ends of the two groups of connecting springs are fixedly connected to the outside of the supporting frame.

Optionally, a sliding rod is slidably connected in each of the two mounting frames; the tail ends of the two sliding rods are both connected in the screening box in a sliding way; the outer parts of the two sliding rods are fixedly connected with a supporting spring; the tail ends of the two supporting springs are respectively fixedly connected to the inner sides of the two mounting frames; the right end surfaces of the two sliding rods are fixedly connected with a screening frame; the bottom end surfaces of the two screening frames are provided with screen holes; the diameter of the sieve holes of the upper screening frame is larger than that of the sieve holes of the lower screening frame; the right end surfaces of the two screening frames are fixedly connected with a guide sliding block in the middle; the two guide sliding blocks are both connected in the screening box in a sliding way; the right end faces of the two guide sliding blocks are fixedly connected with a second inserting block.

Optionally, a material distributing roller is rotatably connected to the lower part of the material feeding frame in the middle; two buffer backing plates are symmetrically and rotatably connected to the lower part of the feeding frame; the positions of the two buffer backing plates are aligned; the bottom end surfaces of the two buffer backing plates are fixedly connected with a group of buffer springs; the tail ends of the two groups of buffer springs are fixedly connected to the inner side of the feeding frame.

Optionally, the top end surface of the collecting box is fixedly connected with an air outlet pipe; a dust suction fan is fixedly arranged in the upper part of the collecting box; the dust suction fan is aligned with the position of the air outlet pipe; two dust collection pipes are symmetrically and fixedly connected to the lower part of the collection box; the tail ends of the two dust collection pipes are provided with a dust collection head; the two dust collection heads are symmetrically arranged in the screening box.

Optionally, two mounting sliding rails are symmetrically and fixedly connected in the collecting box; the inner sides of the two mounting slide rails are provided with a mounting slide groove in the middle; the two mounting sliding grooves are of T-shaped groove structures; a mounting sliding block is connected in the two mounting sliding grooves in a sliding way; an active carbon filter screen is fixedly connected between the two installation sliding blocks; the rear end face of the active carbon filter screen is fixedly connected with a connecting plate; the rear end face of the connecting plate is fixedly connected with an operation handle in the middle.

Advantageous effects

According to the utility model, the aluminum raw materials of the screening can be automatically evenly separated in the use process, the aluminum raw materials are prevented from being accumulated in the aluminum secondary screening machine, the operation is simple and quick, the use is more convenient, the screening efficiency of the secondary screening machine on the aluminum raw materials is effectively increased, the feeding speed of the aluminum raw materials can be effectively slowed down, the blocking of a feeding frame is prevented, and meanwhile, the aluminum raw materials entering the screening box are more uniform.

In addition, after pouring the aluminum product raw materials into the feed frame, the aluminum product raw materials of whereabouts can drive the feed roll and rotate, divide the aluminum product raw materials that gets into the feed frame through the rotation of feed roll, the aluminum product raw materials after dividing can fall to the cushion plate on, make the cushion plate rotate and extrude buffer spring, the breach that falls between two cushion plates can be followed to the aluminum product raw materials on the cushion plate after the cushion plate takes place to rotate falls into the screening incasement, the effectual feed rate who slows down the aluminum product raw materials, also can make the aluminum product raw materials that gets into the screening incasement more even when preventing that the feed frame from taking place to block up.

In addition, the driving motor is started to drive the extrusion cam to rotate, and two control slide bars are sequentially extruded in the rotation process of the extrusion cam; make two control slide bars slide in the support frame in proper order, the slip through the support frame drives first inserted block and removes, can extrude the second inserted block at the in-process that first inserted block removed and make the second inserted block drive the guide slide block and slide and drive the screening frame and remove at the screening case, can make the slide bar slide and extrude supporting spring at the screening incasement at the in-process that the screening frame removed, the screening frame can reset along with supporting spring's resilience after first inserted block resets, and then make the screening frame carry out reciprocating motion and evenly open the aluminum product raw materials in the screening frame, prevent that the aluminum product raw materials from producing and piling up on the screening frame, easy operation is swift, it is more convenient to use, the effectual sieve separation efficiency that has increased the secondary screening machine to the aluminum product raw materials that divides, the sieve mesh that has different sizes on two screening frames simultaneously can do benefit to the secondary screening to the aluminum product raw materials, further improve the screening efficiency of the secondary screening machine to the aluminum product raw materials.

In addition, in the process of screening aluminum materials, the staff can start the dust collection fan, the dust collection fan is enabled to suck dust and powder particles generated by screening in the screening box into the collecting box through the dust collection head and the dust collection pipe, the dust and the powder particles entering the collecting box are purified and filtered by the active carbon filter screen, the dust and the powder particles are left on the active carbon filter screen, clean air after filtration is discharged from the air outlet pipe, when more dust and powder particles are accumulated on the active carbon filter screen, the staff can pull the operating handle to enable the connecting plate to drive the active carbon filter screen to move at present and enable the installation sliding block to slide in the installation sliding groove to pull out the active carbon filter screen, and then the pulled active carbon filter screen is replaced.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings of the embodiments will be briefly described below.

In the drawings:

FIG. 1 is a schematic diagram of an axial structure of the present utility model.

Fig. 2 is a schematic diagram of the rear-view isometric structure of the present utility model.

Fig. 3 is a schematic cross-sectional view of the present utility model.

Fig. 4 is a schematic cross-sectional view of the feed rack of the present utility model.

Fig. 5 is a schematic cross-sectional view of the collecting tank of the present utility model.

Fig. 6 is an enlarged schematic view of the structure of fig. 5 at a in accordance with the present utility model.

List of reference numerals

1. A screening box; 101. a connecting frame; 102. a support column; 103. a screening cabin; 104. a mounting frame; 105. a slide bar; 106. a support spring; 107. a screening frame; 108. a support frame; 109. discharging pipes; 110. a driving motor; 111. extruding the cam; 112. a control slide bar; 113. a connecting spring; 114. a first plug; 115. a guide slide block; 116. a second insert block; 117. a feeding frame; 118. a material distributing roller; 119. a cushion pad; 120. a buffer spring; 121. a collection box; 122. a dust collection pipe; 123. a dust collection head; 124. an air outlet pipe; 125. a dust collection fan; 126. installing a sliding rail; 127. installing a chute; 128. installing a sliding block; 129. an active carbon filter screen; 130. a connecting plate; 131. the handle is operated.

Detailed Description

In order to make the objects, aspects and advantages of the technical solution of the present utility model more clear, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiment of the present utility model. Unless otherwise indicated, terms used herein have the meaning common in the art. Like reference numerals in the drawings denote like parts.

Examples: please refer to fig. 1 to 6:

the utility model provides an aluminum product secondary screening machine, which comprises: a screening box 1;

the lower part of the screening box 1 is fixedly connected with a connecting frame 101; the connecting frame 101 is of a square-shaped block structure; four support columns 102 are fixedly connected to the outer side of the connecting frame 101 in a rectangular array shape; a screening cabin 103 is arranged in the screening box 1; a feeding frame 117 is fixedly connected to the center of the top end surface of the screening box 1; the feed rack 117 is aligned with the position of the screening deck 103; the upper part of the rear end surface of the screening box 1 is fixedly connected with a collecting box 121; the collecting box 121 is of a rectangular box-like structure; two mounting frames 104 are symmetrically and fixedly connected to the left end face of the screening box 1; both mounting frames 104 are U-shaped block structures; a supporting frame 108 is fixedly connected with the middle of the right end face of the screening box 1; the support frame 108 has a U-shaped block structure; a blanking pipe 109 is fixedly connected to the bottom end surface of the screening box 1 in the middle.

Further, according to the embodiment of the present utility model, as shown in fig. 1 and 3, a driving motor 110 is screw-fastened to the right end surface of the supporting frame 108; the left end surface of the driving motor 110 is coaxially connected with an extrusion cam 111; the pressing cam 111 is provided in the support frame 108; two control slide bars 112 are symmetrically and slidably connected in the support frame 108; the inner sides of the two control slide bars 112 are both in contact with the outside of the pressing cam 111; a first insert block 114 is fixedly connected to the outer sides of the two control slide bars 112; a group of connecting springs 113 are fixedly connected to the inner sides of the two first inserting blocks 114; the ends of the two groups of connecting springs 113 are fixedly connected to the outside of the supporting frame 108, so that the driving motor 110 is started to drive the extrusion cam 111 to rotate, and the two control slide bars 112 are sequentially extruded in the process of rotating the extrusion cam 111; the two control slide bars 112 slide in the support frame 108 in sequence, and the first insert block 114 is driven to move and stretch the connecting spring 113 by the sliding of the support frame 108.

Furthermore, according to the embodiment of the present utility model, as shown in fig. 3, a sliding rod 105 is slidably connected to each of the two mounting frames 104; the tail ends of the two sliding rods 105 are both in sliding connection in the screening box 1; the outer parts of the two sliding rods 105 are fixedly connected with a supporting spring 106; the tail ends of the two supporting springs 106 are fixedly connected to the inner sides of the two mounting frames 104 respectively; the right end surfaces of the two sliding rods 105 are fixedly connected with a screening frame 107; the bottom end surfaces of the two screening frames 107 are provided with screening holes; the screen hole diameter of the upper screening frame 107 is larger than that of the lower screening frame 107; the right end surfaces of the two screening frames 107 are fixedly connected with a guide sliding block 115 in the middle; both guide sliders 115 are slidably connected in the screening box 1; the right end faces of the two guide sliding blocks 115 are fixedly connected with a second inserting block 116, so that the second inserting block 116 can be extruded to enable the second inserting block 116 to drive the guide sliding blocks 115 to slide in the screening box 1 and drive the screening frame 107 to move in the screening box 1, the sliding rod 105 can slide in the screening box 1 and extrude the supporting spring 106 in the screening frame 107 moving process, the screening frame 107 can reset along with rebound of the supporting spring 106 after the first inserting block 114 resets, further the screening frame 107 can reciprocate to evenly open aluminum raw materials in the screening frame 107, the aluminum raw materials are prevented from being accumulated on the screening frame 107, the operation is simple and fast, the use is more convenient, the screening efficiency of the secondary screening machine on the aluminum raw materials is effectively improved, and meanwhile, secondary screening can be facilitated through different screen holes on the two screening frames 107, and the screening efficiency of the secondary screening machine on the aluminum raw materials is further improved.

Furthermore, according to an embodiment of the present utility model, as shown in fig. 1 and 4, a feed roll 118 is rotatably coupled to a lower portion of the feed frame 117 at a center; two buffer backing plates 119 are symmetrically and rotatably connected to the lower part of the feeding frame 117; alignment between the two cushioning pads 119; a group of buffer springs 120 are fixedly connected to the bottom end surfaces of the two buffer base plates 119; the end of two sets of buffer springs 120 is all fixed connection in the inboard of feed frame 117 to after pouring the aluminum product raw materials into feed frame 117 in, the aluminum product raw materials of whereabouts can drive feed roll 118 and rotate, divide the aluminum product raw materials that gets into feed frame 117 through the rotation of feed roll 118, the aluminum product raw materials after dividing can fall to on the buffer backing plate 119, make buffer backing plate 119 rotate and extrude buffer springs 120, it can fall into screening box 1 to fall on buffer backing plate 119 after buffer backing plate 119 takes place to rotate, the effectual feed rate that slows down the aluminum product raw materials, also can make the aluminum product raw materials that gets into in the screening box 1 more even when preventing that feed frame 117 from taking place to block up.

In addition, according to the embodiment of the present utility model, as shown in fig. 2 and 3, an air outlet pipe 124 is fixedly connected to the top end surface of the collection box 121; a dust suction fan 125 is fixedly installed in the upper part of the collecting box 121; the dust suction fan 125 is aligned with the air outlet pipe 124; two dust collection pipes 122 are symmetrically and fixedly connected to the lower part of the collection box 121; the tail ends of the two dust collection pipes 122 are provided with a dust collection head 123; two dust absorption heads 123 symmetry sets up in screening case 1 to at the in-process of classifying the aluminum product raw materials, the staff can start dust absorption fan 125, makes dust absorption fan 125 through dust absorption head 123 and dust absorption pipe 122 with in screening case 1 because dust and the powder particle of classifying screen inhale collecting box 121 in, prevent to divide dust and the powder particle of classifying screen production to the operational environment on every side and cause the pollution.

In addition, according to the embodiment of the present utility model, as shown in fig. 5 and 6, two mounting sliding rails 126 are symmetrically and fixedly connected in the collection box 121; a mounting sliding groove 127 is formed in the middle of the inner sides of the two mounting sliding rails 126; both mounting runners 127 are T-slot shaped; a mounting slide block 128 is slidably connected in each of the two mounting slide grooves 127; an activated carbon filter screen 129 is fixedly connected between the two mounting sliding blocks 128; a connecting plate 130 is fixedly connected to the rear end surface of the activated carbon filter screen 129; the rear end face of the connecting plate 130 is fixedly connected with an operation handle 131 in the middle, so that dust and powder particles entering the collecting box 121 can be purified and filtered by the activated carbon filter screen 129, the dust and the powder particles are left on the activated carbon filter screen 129, filtered clean air is discharged from the air outlet pipe 124, when more dust and powder particles are accumulated on the activated carbon filter screen 129, a worker can pull the operation handle 131 to enable the connecting plate 130 to drive the activated carbon filter screen 129 to move at present and enable the installation sliding block 128 to slide in the installation sliding groove 127 to pull out the activated carbon filter screen 129, and then the pulled activated carbon filter screen 129 is replaced.

Specific use and action of the embodiment:

in the use process of the utility model, the screening box 1 is supported by the support column 102, after the aluminum raw materials are poured into the feeding frame 117, the falling aluminum raw materials can drive the distributing roller 118 to rotate, the aluminum raw materials entering the feeding frame 117 are distributed by the rotation of the distributing roller 118, the distributed aluminum raw materials can fall onto the buffer pad 119, the buffer pad 119 is driven to rotate and press the buffer spring 120, the aluminum raw materials falling onto the buffer pad 119 after the rotation of the buffer pad 119 can fall into the screening box 1 from a gap between the two buffer pad 119, the feeding speed of the aluminum raw materials is effectively slowed down, the blocking of the feeding frame 117 is prevented, the aluminum raw materials entering the screening box 1 can be more uniform, the driving motor 110 is started to drive the pressing cam 111 to rotate, and the two control slide bars 112 are sequentially pressed in the rotation process of the pressing cam 111; the two control slide bars 112 sequentially slide in the supporting frame 108, the first inserting block 114 is driven to move and stretch the connecting spring 113 through the sliding of the supporting frame 108, the second inserting block 116 can be extruded in the moving process of the first inserting block 114 to enable the second inserting block 116 to drive the guide slide block 115 to slide in the screening box 1 and drive the screening frame 107 to move, the sliding rod 105 can slide in the screening box 1 and extrude the supporting spring 106 in the moving process of the screening frame 107, the screening frame 107 can reset along with the rebound of the supporting spring 106 after the first inserting block 114 resets, the screening frame 107 can further reciprocate to evenly open the aluminum raw materials in the screening frame 107, the aluminum raw materials are prevented from piling up on the screening frame 107, the operation is simple and quick, the use is more convenient, the screening efficiency of the secondary screening machine on the aluminum raw materials is effectively increased, meanwhile, the screening efficiency of the secondary screening machine on the aluminum raw materials can be further improved through the screening holes with different sizes on the two screening frames 107, the screened aluminum raw materials are discharged through the blanking pipe 109 to be convenient for workers to collect, in the screening process of the aluminum raw materials, the workers can start the dust suction fan 125, the dust suction fan 125 sucks dust and powder particles generated by the screening in the screening box 1 into the collecting box 121 through the dust suction head 123 and the dust suction pipe 122, the dust and the powder particles entering the collecting box 121 can be purified and filtered by the active carbon filter screen 129, the dust and the powder particles are remained on the active carbon filter screen 129, the filtered clean air is discharged from the air outlet pipe 124, when the dust and the powder particles accumulated on the active carbon filter screen 129 are more, the staff can pull the operation handle 131 to make the connecting plate 130 drive the active carbon filter screen 129 to move the day by day and make the installation slider 128 slide in the installation spout 127 to pull out the active carbon filter screen 129, then change the active carbon filter screen 129 that pulls out can, easy operation is swift, and it is more convenient to use, prevents dust and powder granule that the screening produced and causes the pollution to surrounding operational environment.

Claims (6)

1. An aluminum product secondary divides screen (ing) machine, characterized by comprising: a screening box (1); the lower part of the screening box (1) is fixedly connected with a connecting frame (101); the connecting frame (101) is of a square-shaped block structure; four support columns (102) are fixedly connected to the outer side of the connecting frame (101) in a rectangular array shape; a screening cabin (103) is arranged in the screening box (1); a feeding frame (117) is fixedly connected with the center of the top end surface of the screening box (1); -the feeding rack (117) is aligned with the screening deck (103); the upper part of the rear end surface of the screening box (1) is fixedly connected with a collecting box (121); the collecting box (121) is of a rectangular box-shaped structure; two mounting frames (104) are symmetrically and fixedly connected to the left end face of the screening box (1); both the mounting frames (104) are U-shaped block structures; a supporting frame (108) is fixedly connected with the right end face of the screening box (1) in the middle; the support frame (108) is of a U-shaped block structure; the bottom end surface of screening case (1) is fixedly connected with unloading pipe (109) in the middle.

2. An aluminum secondary screening machine as claimed in claim 1, wherein: a driving motor (110) is connected to the right end face of the supporting frame (108) in a bolt fastening manner; the left end face of the driving motor (110) is coaxially connected with an extrusion cam (111); the extrusion cam (111) is arranged in the supporting frame (108); two control slide bars (112) are symmetrically and slidably connected in the support frame (108); the inner sides of the two control slide bars (112) are contacted with the outer part of the extrusion cam (111); the outer sides of the two control slide bars (112) are fixedly connected with a first inserting block (114); a group of connecting springs (113) are fixedly connected to the inner sides of the two first inserting blocks (114); the tail ends of the two groups of connecting springs (113) are fixedly connected to the outside of the supporting frame (108).

3. An aluminum secondary screening machine as claimed in claim 1, wherein: a sliding rod (105) is connected in the two mounting frames (104) in a sliding way; the tail ends of the two sliding rods (105) are both in sliding connection in the screening box (1); the outer parts of the two sliding rods (105) are fixedly connected with a supporting spring (106); the tail ends of the two supporting springs (106) are respectively and fixedly connected to the inner sides of the two mounting frames (104); the right end faces of the two sliding rods (105) are fixedly connected with a screening frame (107); the bottom end surfaces of the two screening frames (107) are provided with screen holes; the diameter of the sieve holes of the upper screening frame (107) is larger than that of the sieve holes of the lower screening frame (107); the right end faces of the two screening frames (107) are fixedly connected with a guide sliding block (115) in the middle; the two guide sliding blocks (115) are both connected in the screening box (1) in a sliding way; the right end faces of the two guide sliding blocks (115) are fixedly connected with a second inserting block (116).

4. An aluminum secondary screening machine as claimed in claim 1, wherein: the lower part of the feeding frame (117) is rotatably connected with a material distributing roller (118) in the middle; two buffer backing plates (119) are symmetrically and rotatably connected to the lower part of the feeding frame (117); the position between the two buffer backing plates (119) is aligned; the bottom end surfaces of the two buffer backing plates (119) are fixedly connected with a group of buffer springs (120); the tail ends of the two groups of buffer springs (120) are fixedly connected to the inner side of the feeding frame (117).

5. An aluminum secondary screening machine as claimed in claim 1, wherein: the top end surface of the collecting box (121) is fixedly connected with an air outlet pipe (124); a dust suction fan (125) is fixedly arranged in the upper part of the collecting box (121); the dust suction fan (125) is aligned with the air outlet pipe (124); two dust collection pipes (122) are symmetrically and fixedly connected to the lower part of the collection box (121); the tail ends of the two dust collection pipes (122) are provided with a dust collection head (123); the two dust collection heads (123) are symmetrically arranged in the screening box (1).

6. An aluminum secondary screening machine as claimed in claim 1, wherein: two mounting sliding rails (126) are symmetrically and fixedly connected in the collecting box (121); the inner sides of the two mounting slide rails (126) are provided with a mounting slide groove (127) in the middle; the two mounting sliding grooves (127) are of T-shaped groove structures; a mounting sliding block (128) is slidably connected in each of the two mounting sliding grooves (127); an active carbon filter screen (129) is fixedly connected between the two mounting sliding blocks (128); the rear end surface of the active carbon filter screen (129) is fixedly connected with a connecting plate (130); an operation handle (131) is fixedly connected to the rear end face of the connecting plate (130) in the middle.