CN219990519U - Cover film blanking device of integrated circuit lead frame brown oxidation electroplating equipment - Google Patents

Abstract

The utility model relates to the technical field of lead frame blanking devices, in particular to a cover film blanking device of integrated circuit lead frame brown oxidation electroplating equipment, which comprises a material receiving box for stacking lead frames and a cover film box for storing diaphragms, wherein a cover film component for attaching the diaphragms of the cover film box to the surfaces of the lead frames of the material receiving box is arranged between the material receiving box and the cover film box; the cover membrane component comprises a reciprocating film absorbing piece capable of longitudinally moving; the material receiving box is provided with a first material ejection assembly which longitudinally moves to lift the lead frame; the cover box is provided with a second ejector component which longitudinally moves to lift the diaphragm; the lead frames are moved to the blanking boxes to be stacked, the first material ejection assembly is used for lifting, then slowly descending, each time one lead frame is blanked, the cover film assembly is attached to the top surface of the lead frames from the diaphragm lifted in the cover film box, the adjacent two lead frames are separated by the diaphragm, the contact surface cannot be scratched, and the lead frames are effectively protected.

Description

Cover film blanking device of integrated circuit lead frame brown oxidation electroplating equipment

Technical Field

The utility model relates to the technical field of lead frame blanking devices, in particular to a cover film blanking device of brown oxidation electroplating equipment for an integrated circuit lead frame.

Background

The lead frame is used as a chip carrier of an integrated circuit, and is a key structural member for realizing the electric connection between an internal circuit leading-out end of the chip and an external lead by means of bonding materials (gold wires, aluminum wires and copper wires) to form an electric loop, and plays a role of a bridge connected with an external lead, and most of semiconductor integrated blocks need to use the lead frame, so that the lead frame product has high requirement quality.

The utility model of China with the patent number of CN202122640524.5 discloses an integrated circuit lead frame electroplating loading and unloading integrated machine, which comprises a loading device and a unloading device, wherein the loading device and the unloading device are provided with a transmission mechanism for transmitting the integrated circuit lead frame of the loading device to the unloading device; the feeding device comprises a frame, a first feeding mechanism and a second feeding mechanism which are arranged on the frame; the first feeding mechanism comprises a material box component and a feeding component matched with the material box component and used for conveying the integrated circuit lead frames in the material box component to the transmission mechanism; the second feeding mechanism comprises a material rack for storing the integrated circuit lead frames, a delivery component for conveying the integrated circuit lead frames in the material rack to a preset position, and a suction component for conveying the integrated circuit lead frames positioned at the preset position to the conveying mechanism. The feeding device can feed materials at multiple positions so as to improve the production efficiency.

At present, the metal lead frame is stacked after the processing and blanking are finished, and the surface of a substrate is easy to scratch during stacking, or particles or dust fall on the surface of a base material to cause the quality problem of the lead frame, so that bad products of the lead frame are generated after the electroplating is finished.

Disclosure of Invention

The utility model aims to provide a cover film blanking device of integrated circuit lead frame brown oxidation electroplating equipment, aiming at the defects of the prior art.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the cover film blanking device of the integrated circuit lead frame brown oxidation electroplating equipment comprises a material receiving box for stacking the lead frames and a cover film box for storing diaphragms, wherein a cover film assembly for attaching the diaphragms of the cover film box to the surfaces of the lead frames of the material receiving box is arranged between the material receiving box and the cover film box; the cover membrane component comprises a film absorbing piece which moves back and forth between the cover membrane box and the material receiving box and can move longitudinally; the material receiving box is provided with a first material ejection assembly which longitudinally moves to lift the lead frame; the bellows is provided with a second ejector assembly that lifts the diaphragm longitudinally.

Further: the material collecting box is provided with a first conveying part for conveying the whole stack of lead frames with the cover films outwards, the first material ejecting assembly comprises a plurality of longitudinally moving first material lifting blocks, the bottoms of the first material lifting blocks are connected with first material lifting rods, and the material collecting box is provided with a first through groove for the first material lifting rods to slide through.

Further: the first conveying part comprises a plurality of first belt conveying parts which are arranged at intervals, a first through groove is formed in the gap between two adjacent first belt conveying parts, a first bottom driving frame is arranged at the bottom of the material collecting box, a first longitudinal driving part which moves longitudinally is arranged on the first bottom driving frame, a first connecting plate which connects all first material lifting rods is arranged at the driving end of the first longitudinal driving part, a first bottom driving plate is arranged at the top of the first bottom driving frame, and a first bottom driving groove which allows the first material lifting rods to slide through is formed in the first bottom driving plate.

Further: the receiving box is further provided with a positioning assembly for guiding and positioning the lead frame from the blanking to the receiving box, the positioning assembly comprises a blanking support frame for supporting the blanking lead frame and a positioning rod for pushing the lead frame of the blanking support frame, and the blanking support frame and the positioning rod can be both close to or far away from the first ejection assembly in a reciprocating manner.

Further: the positioning assembly further comprises a positioning fixing plate used for installing a positioning rod and a blanking supporting frame, the blanking supporting frame is provided with a plurality of supporting blocks which are alternately arranged with the first material lifting blocks, the positioning fixing plate is provided with a transversely arranged pushing bar which moves along the conveying direction of the first conveying piece, and the positioning rod is longitudinally arranged at the end part of the pushing bar.

Further: the cover film box is provided with a second conveying part for conveying the diaphragm back and forth in the cover film box, the second material ejection assembly comprises a plurality of second material lifting blocks which longitudinally move, the bottoms of the second material lifting blocks are connected with second material lifting rods, and the cover film box is provided with a second through groove for the second material lifting rods to slide through.

Further: the second conveying part comprises a plurality of second belt conveying parts which are arranged at intervals, the second through grooves are formed in gaps between two adjacent second belt conveying parts, a second bottom driving frame is arranged at the bottom of the cover box, a second longitudinal driving part which moves longitudinally is arranged at the second bottom driving frame, a second connecting plate which connects all second lifting rods is arranged at the driving end of the second longitudinal driving part, a second bottom driving plate is arranged at the top of the second bottom driving frame, and a second bottom driving groove for the second lifting rods to slide through is formed in the second bottom driving plate.

Further: the cover film assembly comprises a cover film sliding seat which moves between the material collecting box and the cover film box, a sucker mounting plate which is transversely arranged is mounted on the cover film sliding seat, a sucker long groove is formed in the sucker mounting plate along the length direction, and the suction film piece is a suction disk piece which is mounted on the sucker long groove of the sucker mounting plate in an adjustable position.

Further: the cover film assembly further comprises a cover film longitudinal plate which is longitudinally arranged, wherein the cover film longitudinal plate is provided with a cover film transverse plate which can longitudinally move, and a first transverse driving piece which drives the cover film sliding seat to reciprocate is arranged on the cover film transverse plate along the length direction.

Further: one side wall of the cover film box is provided with a positioning push plate which can stretch and retract to enable the diaphragm of the whole stack to go to the other inner side wall of the cover film box in order, the side wall of the cover film box is slidably provided with a transverse guide rod and a transverse telescopic rod, and one ends of the transverse guide rod and the transverse telescopic rod are connected with the positioning push plate which is longitudinally arranged.

The utility model has the beneficial effects that: the electroplated lead frames are moved to the blanking box to be stacked, when the lead frames are stacked, the first material ejection assembly is used for lifting and then slowly descending, the blanking positions of all the lead frames are identical in height, each lead frame is blanked, the diaphragm lifted in the cover box is attached to the top surface of the lead frame by the cover film assembly, the adjacent two lead frames are separated by the diaphragm, and the contact surface is free from scratch, so that the lead frames are effectively protected.

Drawings

Fig. 1 is a schematic structural view of a cover film blanking device.

Fig. 2 is a schematic structural view of the receiving box.

Fig. 3 is a schematic view of another view structure of the receiving box.

Fig. 4 is a schematic structural view of the bellows.

Fig. 5 is a schematic view of another view structure of the cover film case.

Fig. 6 is a schematic structural view of a cover film assembly.

The reference numerals include:

1-a material collecting box,

10-a first material ejection assembly, 11-a first belt conveying part, 12-a first material lifting block, 13-a first material lifting rod, 14-a first through groove, 15-a first bottom driving frame, 16-a first longitudinal driving part,

17-first connecting plate, 18-first bottom driving plate, 19-first bottom driving groove,

A 2-positioning component,

21-positioning fixing plate, 22-blanking supporting frame, 23-supporting block, 24-pushing bar, 25-positioning rod,

3-film covering box,

30-second top material component, 31-second belt conveying part, 32-second material lifting block, 33-second material lifting rod, 34-second through groove, 35-second bottom driving frame, 36-second longitudinal driving part,

37-second connecting plate, 38-second bottom driving plate, 39-second bottom driving groove,

4-positioning push plate,

41-transverse guiding rod, 42-transverse telescopic rod,

A 5-cover membrane component,

51-cover film longitudinal plate, 52-cover film transverse plate, 53-first transverse driving piece, 54-cover film sliding seat, 55-sucker mounting plate, 56-sucker long groove and 57-sucker piece.

Detailed Description

The present utility model will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1-6, a cover film blanking device of integrated circuit lead frame brown oxidation electroplating equipment comprises a receiving box 1 for stacking lead frames and a cover film box 3 for storing diaphragms, wherein a cover film assembly 5 for attaching the diaphragms of the cover film box 3 to the lead frame surfaces of the receiving box 1 is arranged between the receiving box 1 and the cover film box 3; the cover film assembly 5 comprises a film absorbing piece which reciprocates between the cover film box 3 and the material receiving box 1 and can longitudinally move;

the material receiving box 1 is provided with a first material ejecting component 10 which longitudinally moves to lift the lead frame; the cover capsule 3 is provided with a second ejector assembly 30 which lifts the diaphragm longitudinally.

The material collecting box 1 is provided with a first conveying part for conveying the whole stack of lead frames finished by the cover film outwards, the first conveying part comprises a plurality of first belt conveying parts 11 which are arranged at equal intervals, the first belt conveying parts 11 move along the length direction of the material collecting box 1, and the first belt conveying parts 11 rotate under the driving of a synchronous wheel and a motor, so that the first belt conveying parts 11 are driven to move, the whole stack of lead frames stacked in the material collecting box 1 can be outwards conveyed under the driving of the first belt conveying parts 11, and the material collecting box is convenient to take away.

The first ejector assembly 10 comprises a plurality of longitudinally moving first lifting blocks 12, first lifting rods 13 are connected to the bottoms of the first lifting blocks 12, and first through grooves 14 for the first lifting rods 13 to slide through are formed in the material receiving box 1. The first through groove 14 is formed in the gap between two adjacent first belt conveying pieces 11, a first bottom driving frame 15 is arranged at the bottom of the material collecting box 1, a first longitudinal driving piece 16 which moves longitudinally is arranged on the first bottom driving frame 15, the first longitudinal driving piece 16 is a lifting cylinder, a first connecting plate 17 which connects all first material lifting rods 13 is arranged at the driving end of the first longitudinal driving piece 16, a first bottom driving plate 18 is arranged at the top of the first bottom driving frame 15, and a first bottom driving groove 19 which allows the first material lifting rods 13 to slide through is formed in the first bottom driving plate 18.

When the processed lead frame is fed to be aligned with the material receiving box 1 through the clamping mechanism, the first material ejecting assembly 10 works, the first longitudinal driving piece 16 is lifted up and down in a lifting manner, all the first material lifting rods 13 arranged on the first connecting plate 17 are driven to slide and lift up in the first bottom driving grooves 19 and pass through the first through grooves 14 to lift up, the first material lifting blocks 12 arranged at the top ends of the first material lifting rods 13 can support the lead frame, and the descending movement path of the clamping mechanism can be reduced; every time a lead frame is lowered, the first longitudinal driving member 16 lowers by one lead frame, so that the lowering height of the lead frame clamped by the clamping mechanism every time to the receiving box 1 is equal, and the lead frames can be accurately stacked in the receiving box 1 for discharging and receiving.

The receiving box 1 is further provided with a positioning component 2 for guiding and positioning the lead frame which is fed to the receiving box 1, the positioning component 2 comprises a feeding support frame 22 for supporting the lead frame which is fed, and a positioning rod 25 for pushing the lead frame of the feeding support frame 22, and the feeding support frame and the positioning rod 25 can be close to or far from the first ejection component 10 in a reciprocating manner.

The positioning assembly 2 further comprises a positioning fixing plate 21 for installing a positioning rod 25 and a blanking support frame 22, the positioning fixing plate 21 is respectively provided with a telescopic cylinder for driving the positioning rod 25 and the blanking support frame 22 to move back and forth in a telescopic manner, so that the positioning rod 25 and the blanking support frame 22 can be close to or far away from the first material ejection assembly 10, the blanking support frame 22 is formed with a plurality of support blocks 23 which are alternately arranged with the first material lifting blocks 12, the positioning fixing plate 21 is provided with a transversely arranged pushing bar 24 which moves along the conveying direction of the first belt conveying piece 11, and the positioning rod 25 is longitudinally arranged at the end part of the pushing bar 24.

After the lead frame is fed by the receiving box 1 to finish a pile, the lead frame of the whole pile is pushed out outwards by the first belt conveying part 11, at the moment, the feeding support frame 22 is driven by one of the telescopic cylinders to extend forwards, so that the feeding support frame 22 formed with the support block 23 extends forwards and is leveled with the highest lifting position of the first lifting block 12 to support the lead frame, then the first lifting block 12 can be lifted and leveled with the support block 23 to support the lead frame, at the moment, the feeding support frame 22 is driven by one of the telescopic cylinders to retract backwards, so that the feeding support frame 22 formed with the support block 23 retracts backwards, the receiving box 1 is fed normally, and the circulation is repeated, so that the feeding is realized without stopping the feeding, the feeding can be continued without waiting for the first lifting assembly 10 to be in place, and the feeding fluency and stability are ensured.

In addition, when the lead frame is fed and supported by the first feeding block 12, the lead frame is respectively out of order, and at this time, the pushing bar 24 is driven by one of the telescopic cylinders to extend forward, so as to drive the pair of positioning rods 25 to push forward, respectively prop against the front side wall of the lead frame, and the rear side wall of the lead frame is attached to the side wall of the receiving box 1, so that the lead frame can be aligned neatly after being fed, and the subsequent packaging is facilitated.

The cover film box 3 is provided with a second conveying part for conveying the diaphragm back and forth in the cover film box 3, the second conveying part comprises a plurality of second belt conveying parts 31 which are arranged at intervals, the second belt conveying parts 31 move along the length direction of the cover film box 3, the second belt conveying parts 31 are driven by synchronous wheels and motors to rotate, so that the second belt conveying parts 31 are driven to move, the diaphragm film boxes which need to be used in the whole stack can be driven by the second belt conveying parts 31 to move forward to the second ejection assembly 30, and the film absorbing parts which are convenient to reciprocate between the cover film box 3 and the material receiving box 1 and can longitudinally move are absorbed to the surface of the lead frame for discharging to protect.

The second ejector assembly 30 comprises a plurality of longitudinally moving second lifting blocks 32, the bottom of each second lifting block 32 is connected with a second lifting rod 33, and the cover film box 3 is provided with a second through groove 34 for the second lifting rod 33 to slide through. The second through groove 34 is formed in a gap between two adjacent second belt conveying members 31, a second bottom driving frame 35 is mounted at the bottom of the cover film box 3, a second longitudinal driving member 36 which moves longitudinally is mounted on the second bottom driving frame 35, the second longitudinal driving member 36 is a lifting cylinder, a second connecting plate 37 which connects all second lifting rods 33 is mounted on the driving end of the second longitudinal driving member 36, a second bottom driving plate 38 is mounted on the top of the second bottom driving frame 35, and a second bottom driving groove 39 through which the second lifting rods 33 slide is formed in the second bottom driving plate 38.

When the whole stack of diaphragms needs to be pasted into the lead frame of the collecting box 1, the whole stack of diaphragms is moved onto the second ejection assembly 30 by the second belt conveying piece 31, at the moment, the second longitudinal driving piece 36 works to drive all second lifting rods 33 arranged on the second connecting plate 37 to slide and lift in the second bottom driving groove 39 and lift through the second through groove 34, and the second lifting block 32 arranged at the top end of the second lifting rod 33 can support and jack the whole stack of diaphragms, so that the topmost diaphragms can be adsorbed by the cover film assembly 5 and transferred to the surface of the lead frame of the collecting box 1; every time one diaphragm is absorbed, the second longitudinal driving member 36 jacks up the height of one diaphragm, so that the height of each topmost diaphragm is the same, that is, the positions of each absorption of the cover film assembly 5 are the same, the program setting can be reduced, the movement stroke can be reduced, and the absorption efficiency can be improved.

One side wall of the cover film box 3 is provided with a positioning push plate 4 which can telescopically enable the diaphragm of the whole stack to be stacked in order on the other inner side wall of the cover film box 3, the side wall of the cover film box 3 is slidably provided with a transverse guide rod 41 and a transverse telescopic rod 42, one ends of the transverse guide rod 41 and the transverse telescopic rod 42 are connected with the positioning push plate 4 which is longitudinally arranged, when the diaphragm of the whole stack is placed at the tail of the cover film box 3, a telescopic cylinder which is transversely arranged drives the transverse telescopic rod 42 to extend out of the cover film box 3 at the moment, the positioning push plate 4 enables the diaphragm to be close to and attached to the side wall of the other side wall of the cover film box 3, the side wall of the diaphragm is enabled to be attached to be aligned with the side wall of the cover film box 3, and then the diaphragm is stably transferred to the second jacking component 30 by the second belt conveying piece 31 to jack up.

The cover film assembly 5 comprises a cover film sliding seat 54 which moves between the material receiving box 1 and the cover film box 3, wherein a sucker mounting plate 55 which is transversely arranged is mounted on the cover film sliding seat 54, a sucker long groove 56 is formed in the sucker mounting plate 55 along the length direction, the cover film is a sucker 57 which is mounted on the sucker long groove 56 of the sucker mounting plate 55 in an adjustable position, and the sucker 57 is a sucker which is formed by processing silica gel materials. The cover film assembly 5 further comprises a cover film longitudinal plate 51 which is longitudinally arranged, a cover film transverse plate 52 which can longitudinally move is arranged on the cover film longitudinal plate 51, a first transverse driving piece 53 which drives a cover film sliding seat 54 to reciprocate is arranged on the cover film transverse plate 52 along the length direction, and the first transverse driving piece 53 is a telescopic cylinder which is transversely arranged.

When the second ejector assembly 30 lifts the diaphragm, the first transverse driving member 53 drives the cover film sliding seat 54 mounted on the cover film transverse plate 52 to be close to the cover film box 3, the suction cup member 57 mounted on the suction cup mounting plate 55 is longitudinally aligned to the diaphragm through the silica gel suction disc, then the lifting driving member drives the cover film transverse plate 52 to longitudinally move close to the diaphragm, the second ejector assembly 30 lifts the diaphragm to be close to the suction cup member 57 at the same time, the suction cup member 57 adsorbs the topmost diaphragm, then the suction cup member 57 lifts and transversely moves, the suction cup member 57 reaches the upper portion of the material receiving box 1, then the lifting driving member drives the diaphragm to be placed on the surface of the lead frame of the material receiving box 1, and after each lead frame and one layer of diaphragm are placed, the first ejector assembly descends the total height of one lead frame and one diaphragm, so that the suction cup member 57 is attached to the top surface of the lead frame at equal height after each time the diaphragm is released.

In addition, can adjust the position of sucking disc spare 57 according to the length of diaphragm, sucking disc spare 57 carries out the lateral adjustment through sucking disc elongated slot 56 for after sucking disc mounting panel 55 moved the feed box, sucking disc spare 57 can be located the mid portion, can accurately adsorb the diaphragm during the absorption, be convenient for accurately place the lead frame surface.

In view of the above, the present utility model has the above-mentioned excellent characteristics, so that it can be used to improve the performance and practicality of the prior art, and is a product with great practical value.

The foregoing is merely exemplary of the present utility model, and those skilled in the art should not be considered as limiting the utility model, since modifications may be made in the specific embodiments and application scope of the utility model in light of the teachings of the present utility model.

Claims (10)

1. The utility model provides a lid membrane unloader of integrated circuit lead frame brown oxidation electroplating device, is including the receipts magazine that is used for stacking up lead frame and deposit the lid membrane box of diaphragm, its characterized in that: a cover film component for sticking the diaphragm of the cover film box to the surface of the lead frame of the material collecting box is arranged between the material collecting box and the cover film box; the cover membrane component comprises a film absorbing piece which moves back and forth between the cover membrane box and the material receiving box and can move longitudinally; the material receiving box is provided with a first material ejection assembly which longitudinally moves to lift the lead frame; the bellows is provided with a second ejector assembly that lifts the diaphragm longitudinally.

2. The cover film blanking device of an integrated circuit lead frame brown oxide plating apparatus according to claim 1, wherein: the material collecting box is provided with a first conveying part for conveying the whole stack of lead frames with the cover films outwards, the first material ejecting assembly comprises a plurality of longitudinally moving first material lifting blocks, the bottoms of the first material lifting blocks are connected with first material lifting rods, and the material collecting box is provided with a first through groove for the first material lifting rods to slide through.

3. The cover film blanking device of an integrated circuit lead frame brown oxide plating apparatus according to claim 2, wherein: the first conveying part comprises a plurality of first belt conveying parts which are arranged at intervals, a first through groove is formed in a gap between two adjacent first belt conveying parts, a first bottom driving frame is arranged at the bottom of the material collecting box, a first longitudinal driving part which moves longitudinally is arranged on the first bottom driving frame, a first connecting plate which connects all first material lifting rods is arranged at the driving end of the first longitudinal driving part, a first bottom driving plate is arranged at the top of the first bottom driving frame, and a first bottom driving groove which allows the first material lifting rods to slide through is formed in the first bottom driving plate.

4. A cover film blanking device of an integrated circuit lead frame brown oxide plating apparatus according to claim 3, wherein: the receiving box is further provided with a positioning assembly for guiding and positioning the lead frame from the blanking to the receiving box, the positioning assembly comprises a blanking support frame for supporting the lead frame from the blanking and a positioning rod for pushing the lead frame of the blanking support frame, and the blanking support frame and the positioning rod can be both close to or far away from the first ejection assembly in a reciprocating manner.

5. The cover film blanking device of an integrated circuit lead frame brown oxide plating apparatus according to claim 4, wherein: the positioning assembly further comprises a positioning fixing plate used for installing a positioning rod and a blanking supporting frame, the blanking supporting frame is provided with a plurality of supporting blocks which are alternately arranged with the first lifting blocks, the positioning fixing plate is provided with a transversely arranged pushing bar which moves along the conveying direction of the first conveying piece, and the positioning rod is longitudinally arranged at the end part of the pushing bar.

6. The cover film blanking device of an integrated circuit lead frame brown oxide plating apparatus according to claim 1, wherein: the cover film box is provided with a second conveying part for conveying the diaphragm back and forth in the cover film box, the second material ejection assembly comprises a plurality of second material lifting blocks which longitudinally move, the bottoms of the second material lifting blocks are connected with second material lifting rods, and the cover film box is provided with a second through groove for the second material lifting rods to slide through.

7. The cover film blanking device of an integrated circuit lead frame brown oxide plating apparatus of claim 6, wherein: the second conveying part comprises a plurality of second belt conveying parts which are arranged at intervals, the second through grooves are formed in gaps between two adjacent second belt conveying parts, a second bottom driving frame is arranged at the bottom of the cover box, a second longitudinal driving part which moves longitudinally is arranged on the second bottom driving frame, a second connecting plate which connects all second lifting rods is arranged at the driving end of the second longitudinal driving part, a second bottom driving plate is arranged at the top of the second bottom driving frame, and a second bottom driving groove for the second lifting rods to slide through is formed in the second bottom driving plate.

8. The cover film blanking device of an integrated circuit lead frame brown oxide plating apparatus of claim 7, wherein: the cover film assembly comprises a cover film sliding seat which moves between a material collecting box and a cover film box, a sucker mounting plate which is transversely arranged is mounted on the cover film sliding seat, a sucker long groove is formed in the sucker mounting plate along the length direction, and the suction film piece is a suction disk piece which is mounted on the sucker long groove of the sucker mounting plate in an adjustable position.

9. The cover film blanking device of an integrated circuit lead frame brown oxide plating apparatus of claim 8, wherein: the cover film assembly further comprises a cover film longitudinal plate which is longitudinally arranged, wherein the cover film longitudinal plate is provided with a cover film transverse plate which can longitudinally move, and a first transverse driving piece which drives the cover film sliding seat to reciprocate is arranged on the cover film transverse plate along the length direction.

10. The cover film blanking device of an integrated circuit lead frame brown oxide plating apparatus according to claim 1, wherein: one side wall of the cover film box is provided with a positioning push plate which can stretch and retract to enable the diaphragm of the whole stack to be orderly stacked on the other inner side wall of the cover film box, the side wall of the cover film box is slidably provided with a transverse guide rod and a transverse telescopic rod, and one ends of the transverse guide rod and the transverse telescopic rod are connected with the positioning push plate which is longitudinally arranged.