CN112828157A - Refrigerator door shell's cornerite mould of bending - Google Patents

Abstract

The invention relates to the technical field of dies, in particular to a bending corner wrapping die for a refrigerator door shell, which comprises an upper die and a lower die, wherein the upper die comprises an upper die holder, a first pressure plate arranged at the bottom of the upper die holder and a corner wrapping male die mechanism movably connected to the upper die holder, and the corner wrapping male die mechanisms are positioned at two ends of the first pressure plate; the lower die comprises a lower die base, a plurality of pressing blocks fixed on the lower die base, a fixing block, a second pressure plate arranged at the top of the lower die base and a wrap angle female die mechanism movably connected to the lower die base, wherein the wrap angle female die mechanism is positioned on two sides of the second pressure plate; the pressing block is provided with a first extrusion piece in contact with the first pressure plate, the angle wrapping female die mechanism is provided with a third driving block, the upper die base is provided with a second driving block for extruding the third driving block, the angle wrapping male die mechanism is provided with a first driving block, and the fixing block is attached to and extrudes the first driving block. The door shell structure reduces the abrasion of the die and avoids the scratching and wrinkling of the door shell by additionally arranging the extrusion piece and the driving block.

Description

Refrigerator door shell's cornerite mould of bending

Technical Field

The invention relates to the technical field of dies, in particular to a bending wrap angle die of a refrigerator door shell.

Background

The high-end intelligent refrigerator project is being developed in large batch in the market at present, the molding of door panels is increased to 10 bending moldings by original 4 bending moldings, 4 sets of dies are used for forming the shell of the common refrigerator door, and 8 sets of dies are used for forming the shell of the existing high-end intelligent refrigerator door. The production process is long due to the increase of the number of the die sets, products are easy to damage and generate badness or scrap in the process of transferring and carrying, and even the production and manufacturing cost is increased by more than 1 time, so that the process is required to be reduced to 4 to 5 dies to complete the high-end intelligent refrigerator door shell die, and the challenge of completing corner bending and edge wrapping of a compound die is provided.

The key technology in the refrigerator door panel die is bending and edge covering, and the main problems are scratching and wrinkling. The debugging process of the new die is long in time consumption, and the waste of working hours is large for 4 times or 5 times when one set of die is debugged, so that the key technology of composite edge covering bending is necessary to be overcome, and the appearance quality requirement of a high-end refrigerator door shell is ensured.

Chinese patent CN108906990A discloses a corner wrapping mold for bending a refrigerator door shell, which comprises an upper mold and a lower mold, wherein the upper mold comprises: the upper die base, a material pressing plate, a slotting cutter, a bending cutter and a corner wrapping cutter are arranged below the upper die base; the bending knife and the angle wrapping knife are both arranged on the upper die base in a sliding manner; the lower die comprises: the bending base is arranged on the lower die base in a sliding mode; the first side of the bending base is used for being in sliding contact fit with the slotting tool, the first side of the bending tool is used for being in sliding contact fit with the bending leaning block, and the second side of the bending tool is used for being matched with the second side of the bending base to perform bending operation on the refrigerator door shell; the first side of cornerite sword is used for leaning on piece sliding contact cooperation with the cornerite, and the second side of cornerite sword is used for cooperating in order to carry out the cornerite operation with the second side of bending the base to refrigerator door shell. This scheme can have concurrently and bend and cornerite's function, but bending sword and cornerite sword are easy wearing and tearing, and mould life is short, and the mould wearing and tearing can lead to the door shell scotch and corrugate.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a bending wrap angle die of a refrigerator door shell, which has the functions of bending and wrap angle, reduces die abrasion by additionally arranging a driving block and an extrusion piece and avoids scratching and wrinkling of the door shell.

In order to solve the technical problems, the invention adopts the technical scheme that:

the bending and corner wrapping die for the refrigerator door shell comprises an upper die and a lower die, wherein the upper die comprises an upper die base, a first pressure plate arranged at the bottom of the upper die base and a corner wrapping male die mechanism movably connected to the upper die base, and the corner wrapping male die mechanism is positioned at two ends of the first pressure plate; the lower die comprises a lower die base, a plurality of pressing blocks fixed on the lower die base, a fixing block, a second pressure plate arranged at the top of the lower die base and a corner-wrapping female die mechanism movably connected to the lower die base, wherein the corner-wrapping female die mechanisms are positioned on two sides of the second pressure plate; the compact heap is equipped with the first extrusion piece with first pressure flitch contact, cornerite die mechanism is equipped with the third drive block, the upper die base is equipped with the second drive block of extrusion third drive block, cornerite terrace die mechanism is equipped with first drive block, the first drive block of fixed block laminating extrusion.

When the bending wrap angle die for the refrigerator door shell is used, the door shell is placed on a second pressure plate, an upper die moves downwards, a first pressure plate and the second pressure plate act together to press the door shell, a second driving block contacts and extrudes a third driving block on a wrap angle female die mechanism, the wrap angle female die mechanism moves outwards, the first pressure plate and the wrap angle female die mechanism act together to press the door shell, the upper die continues to move downwards, a first extrusion piece on a compression block extrudes the first pressure plate to enable the first pressure plate to move inwards, the wrap angle female die mechanism and the first pressure plate extrude the door shell together to complete a bending process, the upper die continues to move downwards, a fixed block extrudes the first driving block on a wrap angle male die mechanism to enable the wrap angle male die mechanism to move inwards, and four corners of the door shell are wrapped after the fixed block is contacted with the door shell, and the wrap angle process is completed. According to the bending wrap angle die for the refrigerator door shell, the driving block and the extrusion piece are additionally arranged, so that the structure for bending and wrapping the angle is prevented from being directly extruded, the abrasion of the die is reduced, and the door shell is prevented from being scratched and wrinkled.

Furthermore, the two ends of the first pressure plate are provided with inserting blocks, and the second driving blocks are fixed at the two ends of the inserting blocks.

Furthermore, the second driving block and the third driving block are both provided with an inclined surface, and the inclined surface of the second driving block extrudes the inclined surface of the third driving block.

Further, cornerite die mechanism still includes cornerite die, cavity plate, fourth slider, fifth slider, sixth spring, is fixed in the second dog and the briquetting of die holder, the sixth spring passes the second dog and is connected with cavity plate, the cornerite die is fixed in cavity plate, the fourth slider is fixed to be inlayed in the die holder top, cavity plate locates fourth slider top and with fourth slider swing joint, the third drive block is located cavity plate's both ends, the fifth slider is located cavity plate's both ends are located the side of third drive block, fifth slider is pushed down to the briquetting.

Further, the angle-wrapping male die mechanism further comprises a first sliding block, a second sliding block, a male die fixing plate, a first angle-wrapping male die, a fourth spring, a fifth spring, a first stop block, a first limiting block and a second angle-wrapping male die, wherein the first stop block and the first limiting block are fixed on the upper die base, the fourth spring penetrates through the first stop block and is connected with a first driving block, the first sliding block is fixedly embedded at the bottom of the upper die base, the first driving block is located at the bottom of the first sliding block and is movably connected with the first sliding block, the first angle-wrapping male die is fixed on the male die fixing plate, the second sliding block is fixed on the first driving block, the male die fixing plate is limited by the second angle-wrapping male die, the second sliding block and the first limiting block, and the fifth.

Furthermore, the first angle-covering male die, the second angle-covering male die and the male die fixing plate are all provided with inclined planes, and the inclined plane of the first angle-covering male die and the inclined plane of the male die fixing plate all extrude the inclined plane of the second angle-covering male die.

Further, the first pressure plate comprises a first stripper plate, a second stripper plate positioned on two sides of the first stripper plate, and a side pressure plate fixed to the second stripper plate, and the first extrusion piece extrudes the side pressure plate.

Furthermore, the side material pressing plates and the pressing blocks are provided with inclined surfaces, the first extrusion pieces are located on the inclined surfaces of the pressing blocks, and the first extrusion pieces extrude the inclined surfaces of the side material pressing plates.

Furthermore, an upper base plate and a base body located at the bottom of the upper base plate are arranged at the bottom of the upper die base, the first stripper plate and the second stripper plate are arranged at the bottom of the base body, the second stripper plate is fixed on the base body, the first stripper plate is connected with the upper die base through a first spring, the base body is connected with the upper die base through a second spring, and the insert block is located on the upper base plate.

Furthermore, the side material pressing plate and the second material removing plate are fixed on the base body through a third sliding block, a spring stop block is fixedly arranged on the side material pressing plate, and a third spring connected with the first sliding block and the spring stop block is arranged in the second material removing plate.

Compared with the background technology, the invention has the following beneficial effects:

according to the bending wrap angle die for the refrigerator door shell, the driving block and the extrusion piece are additionally arranged, so that the structure for bending and wrapping the angle is prevented from being directly extruded, the abrasion of the die is reduced, and the door shell is prevented from being scratched and wrinkled.

Drawings

FIG. 1 is a schematic structural diagram of a bending wrap angle mold of a refrigerator door shell in an embodiment of the invention;

FIG. 2 is a perspective view of an upper die in an embodiment of the present invention;

FIG. 3 is a perspective view of a lower die in an embodiment of the present invention;

FIG. 4 is a perspective view of a first stripper plate and a second stripper plate in an embodiment of the present disclosure;

FIG. 5 is a schematic view illustrating the connection between the side material pressing plate and the second material removing plate according to the embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a corner-covering punch mechanism in an embodiment of the invention;

FIG. 7 is a schematic structural diagram of a wrap angle die mechanism according to an embodiment of the present invention;

FIG. 8 is an enlarged view taken at A in FIG. 1;

FIG. 9 is an enlarged view at B in FIG. 1;

FIG. 10 is an enlarged view at C of FIG. 1;

in the drawings: 1-upper mould; 11-an upper die holder; 12-an upper base plate; 13-a substrate; 14-a first nip plate; 141-a first stripper plate; 142-a second stripper plate; 143-side material pressing plates; 144-a third slider; 145-spring stop; 146-a third spring; 15-angle-wrapping male die mechanism; 150-a first drive block; 151-first angle wrapping male die; 152-a second angle wrapping male die; 153-punch retainer; 154-a first stop block; 155-a first slider; 156-second slider; 157-a fourth spring; 158-a fifth spring; 159 — first stop; 16-an insert block; 161-a second drive block; 17-a positioning column; 18-a first spring; 19-a second spring; 2-lower mould; 21-a compaction block; 211-a first extruded sheet; 22-wrap angle female die mechanism; 221-a female die fixing plate; 222-wrap angle female die; 223-a third drive block; 224-a fourth slider; 225-fifth slider; 226-briquetting; 227-a second stop; 228-a sixth spring; 23-fixing blocks; 231-a second extruded sheet; 24-a positioning sleeve; 25-a second nip plate; 26-lower die holder.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.

A bending and angle-wrapping die for a refrigerator door shell, as shown in fig. 1 to 3, comprises an upper die 1 and a lower die 2, wherein the upper die 1 comprises an upper die holder 11, a first pressure plate 14 mounted at the bottom of the upper die holder 11, and an angle-wrapping male die mechanism 15 movably connected to the upper die holder 11, and the angle-wrapping male die mechanisms 15 are located at two ends of the first pressure plate 14; the lower die 2 comprises a lower die base 26, a plurality of pressing blocks 21 fixed on the lower die base 26, a fixing block 23, a second pressure plate 25 mounted at the top of the lower die base 26 and a corner-wrapping female die mechanism 22 movably connected to the lower die base 26, wherein the corner-wrapping female die mechanism 22 is positioned on two sides of the second pressure plate 25; the angle wrapping male die mechanism is characterized in that the pressing block 21 is provided with a first extrusion piece 211 which is in contact with the first pressure plate 14, as shown in fig. 9, the angle wrapping female die mechanism 22 is provided with a third driving block 223, the upper die base 11 is provided with a second driving block 161 which extrudes the third driving block 223, as shown in fig. 8, the angle wrapping male die mechanism 15 is provided with a first driving block 150, and the fixing block 23 is attached to and extrudes the first driving block 150, as shown in fig. 10.

When the bending angle wrapping mold for the refrigerator door shell is used, the door shell is placed on the second pressure plate 25, the upper mold 1 moves downwards, the first pressure plate 14 and the second pressure plate 25 jointly press the door shell, the second driving block 161 contacts and extrudes the third driving block 223 on the angle wrapping female mold mechanism 22, the angle wrapping female mold mechanism 223 moves outwards, the first pressure plate 14 and the angle wrapping female mold mechanism 22 jointly press the door shell, the upper mold 1 continues to move downwards, the first extrusion sheet 211 on the compression block 21 extrudes the first pressure plate 14 to enable the first pressure plate 14 to move inwards, the angle wrapping female mold mechanism 22 and the first pressure plate 14 jointly extrude the door shell to complete the bending process, the upper mold 1 continues to move downwards, the fixing block 23 extrudes the first driving block 150 on the angle wrapping male mold mechanism 15 to enable the angle wrapping male mold mechanism 15 to move inwards, and wrap four corners of the door shell after contacting with the door shell, and the angle wrapping process is completed. According to the bending wrap angle die for the refrigerator door shell, the driving block and the extrusion piece are additionally arranged, so that the structure for bending and wrapping the angle is prevented from being directly extruded, the abrasion of the die is reduced, and the door shell is prevented from being scratched and wrinkled.

In one embodiment, as shown in fig. 1 and 2, the two ends of the first pressing plate 14 are provided with the insertion blocks 16, and the second driving blocks 161 are fixed at the two ends of the insertion blocks 16, when in use, the second pressing plate 25 supports the door shell, then drives the upper die 1 to move downwards, and further drives the insertion blocks 16 to move downwards, and the second driving blocks 161 move downwards along with the insertion blocks 16 and are in sliding fit with the third driving blocks 223.

In one embodiment, as shown in fig. 1 to 3, the second driving block 161 and the third driving block 223 are both provided with a slope, and the slope of the second driving block 161 presses the slope of the third driving block 223, as shown in fig. 8, the slope angle of the second driving block 161 is equal to the slope angle of the slope of the third driving block 223, and the slope of the second driving block 161 fits and presses the slope of the third driving block 223, so that the angle-covered die mechanism 22 slides on the lower die holder 26 in a direction close to the pressing block 21.

In one embodiment, as shown in fig. 3 and 7, the wrap angle die mechanism 22 further includes a wrap angle die 222, a die fixing plate 221, a fourth slider 224, a fifth slider 225, a sixth spring 228, a second stopper 227 fixed to the lower die holder 26, and a pressing block, the sixth spring 228 passes through the second stopper 227 and is connected to the die fixing plate 221, the wrap angle die 222 is fixed to the die fixing plate 221, the fourth slider 224 is fixedly mounted on the top of the lower die holder 26, the die fixing plate 221 is mounted on the top of the fourth slider 224 and is movably connected to the fourth slider 224, the third driving block 223 is located at two ends of the die fixing plate 221, the fifth slider 225 is mounted at two ends of the die fixing plate 221 and located beside the third driving block 223, and the pressing block 226 presses the fifth slider 226. Specifically, the inclined surface of the second driving block 161 presses the inclined surface of the third driving block 223, so that the die fixing plate 221 and the part thereon slide along the fourth slider 224 in the direction close to the pressing block 21, and the sixth spring 228 is compressed, when the stroke of the inclined contact surface of the second driving block 161 and the third driving block 223 is finished, the die fixing plate 221 and the part thereon stop moving, and reach a specified position, the first pressing piece 211 on the pressing block 21 presses the first pressing plate 14, so that the first pressing plate 14 moves inwards, and the wrap angle die 222 and the first pressing plate 14 together press the door shell to complete the bending process; when the second driving block 161 is separated from the third driving block 223, the sixth spring 228 is restored to generate an inward tensile force, so that the die fixing plate 221 and the portion thereon move inward along the fourth slider 224, when the die fixing plate 221 contacts the second stopper 227, the die fixing plate 221 and the portion thereon stop moving, and during the movement, the pressing block 226 presses the fifth slider 225 to press the die fixing plate 221, thereby limiting the upward and downward movement of the die fixing plate 221.

In one embodiment, as shown in fig. 6, the corner-wrapping punch mechanism 15 further includes a first slider 155, a second slider 156, a punch holder 153, a first corner-wrapping punch 151, a fourth spring 157, a fifth spring 158, a first stop 159 and a first stop block 154 fixed to the upper die holder 11, and a second corner-wrapping punch 152, the fourth spring 157 passes through the first stop 159 and is connected to a first driving block 150, the first slider 155 is fixed to the bottom of the upper die holder 11, the first driving block 150 is located at the bottom of the first slider 155 and is movably connected to the first slider 155, the first corner-wrapping punch 151 is fixed to the punch holder 153, the second slider 156 is fixed to the first driving block 150, the punch holder 153 is limited by the second corner-wrapping punch 152, the second slider 156, and the first stop block 154, and the fifth spring 158 is located in the punch holder 153.

In one embodiment, the first and second angle-covering punches 151 and 152 and the punch retainer 153 are each provided with a slant surface, and the slant surface of the first angle-covering punch 151 and the slant surface of the punch retainer 153 each press the slant surface of the second angle-covering punch 152. When the angle wrapping machine is used, the upper die 1 is driven to move downwards, the first driving block 150 is in contact with the fixed block 23, the fixed block 23 extrudes the first driving block 150, the inclination angle of the inclined surface of the first angle wrapping male die 151 and the inclination angle of the inclined surface of the male die fixing plate 153 are equal to the inclination angle of the inclined surface of the second angle wrapping male die 152, and the inclined surface of the first angle wrapping male die 151 and the inclined surface of the male die fixing plate 153 are attached to and extrude the inclined surface of the second angle wrapping male die 152, as shown in fig. 10, the first driving block 150, the first angle wrapping male die 151, the male die fixing plate 153, the second sliding block 156 and the fifth spring 158 move upwards along the inclined surface of the second angle wrapping male die 152, and wrap four corners of a door shell after the; the fourth spring 157 is compressed during movement, the fifth spring 158 is compressed during upward movement, and the fourth spring 157 and the fifth spring 158 act together to reset the corner punch mechanism 15 when the fixed block 23 is not in contact with the first driving block 150.

In one embodiment, as shown in fig. 1, 2 and 4, the first pressing plate 14 includes a first stripper plate 141, a second stripper plate 142 positioned at both sides of the first stripper plate 141, and a side pressing plate 143 fixed to the second stripper plate 142, and the first pressing piece 211 presses the side pressing plate 143, as shown in fig. 9.

In one embodiment, the side material plates 143 and the pressing blocks 21 are provided with inclined surfaces, the first pressing piece 211 is located on the inclined surface of the pressing block 21, the first pressing piece 211 presses the inclined surface of the side material plate 143, as shown in fig. 9, the inclination angles of the inclined surfaces of the side material plates 143 and the inclined surfaces of the pressing blocks 21 are equal, and the first pressing piece 211 is attached to the inclined surface of the side material plate 143.

In one embodiment, as shown in fig. 2 and 4, an upper base plate 12 and a base 13 located at the bottom of the upper base plate 12 are disposed at the bottom of the upper base plate 11, a first stripper plate 141 and a second stripper plate 142 are disposed at the bottom of the base 13, the second stripper plate 142 is fixed to the base 13, the first stripper plate 141 is connected to the upper base plate 11 through a first spring 18, the base 13 is connected to the upper base plate 11 through a second spring 19, and the insert block 16 is located on the upper base plate 12. Specifically, the first stripper plate 141 is compressed and expanded by the first spring 18 to move up and down, and the second stripper plate 142 and the base 13 are compressed and expanded by the second spring 19 to move up and down.

In one embodiment, as shown in fig. 2 and 5, the side material pressing plate 143 and the second material removing plate 142 are fixed to the base 13 by a third sliding block 144, the side material pressing plate 143 is fixedly provided with a spring stopper 145, and the second material removing plate 142 is internally provided with a third spring 146 connecting the first sliding block 144 and the spring stopper 145. Specifically, the first pressing piece 211 contacts the inclined surface of the pressing side material plate 143 to move the side material plate 143 and the spring stopper 145 inward, compressing the third spring 146, and when the first pressing piece 211 contacts the inclined surface portion of the side material plate 143, the third spring 146 is restored to generate an outward force to move the side material plate 143 outward.

In one embodiment, as shown in fig. 1 to 3, the upper mold 1 is provided with positioning posts 17, and the lower mold 2 is provided with positioning sleeves 24 which are matched with the positioning posts 17 and are convenient to be positioned with the lower mold 2 when the upper mold 1 moves downwards.

In one embodiment, the door shell is placed on the second pressing plate 25, the upper die 1 moves downwards, the first stripper plate 141 is firstly contacted with the door shell, the first spring 18 compresses the first stripper plate 141, and the first spring and the second pressing plate 25 jointly press the door shell, so that the door shell does not run; the upper die 1 continues to move downwards, the first spring 18 continues to be compressed, the insert block 16 positioned at the bottom of the upper base plate 12 moves downwards, the second driving block 161 contacts and presses the third driving block 223, as shown in fig. 8, the female die fixing plate 221 and the part thereon move towards the direction close to the pressing block 21 along the fourth slider 224, and after the stroke of the inclined contact surface of the second driving block 161 and the third driving block 223 is finished, the female die fixing plate 221 and the part thereon stop moving and reach a specified position; the upper die 1 continues to move downwards, the second stripper plate 142 is in contact with the door shell and presses the door shell together with the corner wrapping die 222, the first pressing sheet 211 on the pressing block 21 presses the side pressing plate 143, as shown in fig. 9, the side pressing plate 143 compresses the third spring 146 to move inwards, and the corner wrapping die 222 and the side pressing plate 143 jointly press the door shell to complete the bending process; the upper die 1 continues to move downwards, the fixing block 23 and the first driving block 150 are both provided with inclined surfaces, a second extrusion sheet 231 is arranged on the inclined surface of the fixing block 23, and the second extrusion sheet 231 contacts and extrudes the inclined surface of the first driving block 150, as shown in fig. 10, the first driving block 150, the first wrap-angle male die 151, the male die fixing plate 153, the second slider 156 and the fifth spring 158 move inwards and upwards along the inclined surface of the second wrap-angle male die 152, and wrap four corners of the door shell after contacting with the door shell, so that the corner wrapping process is completed.

In the detailed description of the embodiments, various technical features may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A bending and corner wrapping die for a refrigerator door shell comprises an upper die (1) and a lower die (2), wherein the upper die (1) comprises an upper die holder (11), a first pressure plate (14) installed at the bottom of the upper die holder (11) and a corner wrapping male die mechanism (15) movably connected to the upper die holder (11), and the corner wrapping male die mechanism (15) is located at two ends of the first pressure plate (14); the lower die (2) comprises a lower die base (26), a plurality of pressing blocks (21) fixed on the lower die base (26), a fixing block (23), a second pressure plate (25) installed at the top of the lower die base (26) and a wrap angle female die mechanism (22) movably connected to the lower die base (26), wherein the wrap angle female die mechanism (22) is located on two sides of the second pressure plate (25); the angle-wrapping male die mechanism is characterized in that the pressing block (21) is provided with a first extrusion piece (211) which is in contact with the first pressure plate (14), the angle-wrapping female die mechanism (22) is provided with a third driving block (223), the upper die base (11) is provided with a second driving block (161) which extrudes the third driving block (223), the angle-wrapping male die mechanism (15) is provided with a first driving block (150), and the fixing block (23) is attached to extrude the first driving block (150).

2. The corner-bending die for the refrigerator door shell according to claim 1, wherein two ends of the first pressing plate (14) are provided with inserting blocks (16), and the second driving blocks (161) are fixed to two ends of the inserting blocks (16).

3. The corner-folding die for the refrigerator door shell according to claim 2, wherein the second driving block (161) and the third driving block (223) are provided with inclined surfaces, and the inclined surfaces of the second driving block (161) press the inclined surfaces of the third driving block (223).

4. The corner-wrap die for the refrigerator door shell according to claim 3, wherein the corner-wrap female die mechanism (22) further comprises a corner-wrap female die (222), a female die fixing plate (221), a fourth slider (224), a fifth slider (225), a sixth spring (228), a second stopper (227) fixed on the lower die holder (26) and a pressing block (226), the sixth spring (228) passes through the second stopper (227) and is connected with the female die fixing plate (221), the corner-wrap female die (222) is fixed on the female die fixing plate (221), the fourth slider (224) is fixedly embedded on the top of the lower die holder (26), the female die fixing plate (221) is arranged on the top of the fourth slider (224) and is movably connected with the fourth slider (224), the third driving blocks (223) are located at two ends of the female die fixing plate (221), the fifth slider (225) is arranged at two ends of the female die fixing plate (221) and is located beside the third driving block (223), the pressure piece (226) presses the fifth slider (225).

5. The corner-wrapping die for the refrigerator door shell according to claims 1 to 4, wherein the corner-wrapping punch mechanism (15) further comprises a first slide block (155), a second slide block (156), a punch retainer (153), a first corner-wrapping punch (151), a fourth spring (157), a fifth spring (158), a first stopper (159) and a first stopper (154) fixed on the upper die holder (11), and a second corner-wrapping punch (152), the fourth spring (157) passes through the first stopper (159) to be connected with a first driving block (150), the first slide block (155) is fixedly embedded at the bottom of the upper die holder (11), the first driving block (150) is positioned at the bottom of the first slide block (155) and movably connected with the first slide block (155), the first corner-wrapping punch (151) is fixed on the punch retainer (153), and the second slide block (156) is fixed on the first driving block (150), the punch retainer (153) is limited by a second corner-wrapping punch (152), a second sliding block (156) and a first limiting block (154), and the fifth spring (158) is arranged in the punch retainer (153).

6. The corner-folding die for the refrigerator door shell according to claim 5, wherein the first corner-folding male die (151), the second corner-folding male die (152) and the male die holder (153) are provided with inclined surfaces, and the inclined surface of the first corner-folding male die (151) and the inclined surface of the male die holder (153) press the inclined surface of the second corner-folding male die (152).

7. The corner-bending die for the refrigerator door shell according to claim 6, wherein the first pressing plate (14) comprises a first stripper plate (141), a second stripper plate (142) positioned at both sides of the first stripper plate (141), and a side pressing plate (143) fixed to the second stripper plate (142), and the first pressing piece (211) presses the side pressing plate (143).

8. The corner-bending die for the refrigerator door shell according to claim 7, wherein the side material pressing plates (143) and the pressing blocks (21) are provided with inclined surfaces, the first pressing sheet (211) is positioned on the inclined surfaces of the pressing blocks (21), and the first pressing sheet (211) presses the inclined surfaces of the side material pressing plates (143).

9. The corner-bending die for the refrigerator door shell according to claim 8, wherein an upper base plate (12) and a base body (13) located at the bottom of the upper base plate (12) are arranged at the bottom of the upper die holder (11), the first stripper plate (141) and the second stripper plate (142) are arranged at the bottom of the base body (13), the second stripper plate (142) is fixed to the base body (13), the first stripper plate (141) is connected with the upper die holder (11) through a first spring (18), the base body (13) is connected with the upper die holder (11) through a second spring (19), and the insert block (16) is located on the upper base plate (12).

10. The corner-bending die for the refrigerator door shell according to any one of claims 7 to 9, wherein the side material pressing plate (143) and the second material removing plate (142) are fixed to the base body (13) through a third sliding block (144), the side material pressing plate (143) is fixedly provided with a spring stopper (145), and a third spring (146) connecting the first sliding block (144) and the spring stopper (145) is arranged in the second material removing plate (142).

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