Bending die stripping and pushing-out device

Abstract

The utility model discloses a bending die stripping and pushing-out device, a left bending punch and a right bending punch on an upper die can tightly abut against material sheets extending out of the outer portions of the left side and the right side of a bending male die of a lower die to enable the material sheets to be bent downwards, and a stripping device on the lower die can upwards jack up a bent and formed product in the die opening process. A notch-shaped left forming block containing groove and a notch-shaped right forming block containing groove are formed in the two sides of the upper end of the bending male die respectively, a left forming block and a right forming block are movably arranged in the left forming block containing groove and the right forming block containing groove respectively, and a left reset driving device and a right reset driving device in the lower die drive the left forming block and the right forming block to move to the forming position and the separating position respectively in the die closing state and the die opening state. The left side face of the left forming block and the right side face of the right forming block located at the forming position are in tight and flat contact with the left side bent edge and the right side bent edge of a bent product correspondingly, and gaps are formed between the left side of the left forming block and the left side bent edge of the bent product and between the right side of the right forming block and the right side bent edge of the bent product and between the right side of the left forming block and the right side bent edge of the bent product correspondingly. According to the invention, smooth stripping of products can be ensured.

Description

Technical Field

[0001] The utility model relates to the field of hardware moulds, in particular to a bending mould stripping and pushing device. Background Art

[0002] When the blank is bent symmetrically 90°, the ejector 40 is generally used to remove the material and then blow out the product. This structure does not affect the discharge effect when it is used for thin materials. When the product blank is thicker, this structure requires two steps to complete product molding, one step of bending and one step of waste cutting. Waste cutting cannot be done at the same station as bending. If they are at the same station, they will affect each other, making it more difficult to adjust the mold. The above-mentioned ejector structure requires a large ejection force when the ejector ejects the product, which makes the ejector structure more complicated, the processing cost is higher, and the assembly and maintenance costs are higher, the requirements are higher, and it is not easy to adjust. Utility Model Content

[0003] In order to overcome the above defects, the utility model provides a bending die stripping and ejecting device, which has a simple structure, can smoothly strip materials with only a small stripping force, and can enable the mold to cut the material strip and bend simultaneously.

[0004] The utility model adopts a technical solution to solve its technical problems: a bending die stripping and ejecting device, comprising an upper die and a lower die, the lower die is provided with a bending punch, the upper die is provided with a left bending punch and a right bending punch, the upper die can be lifted and lowered and is located directly above the lower die, the left bending punch and the right bending punch can press against the material sheets extending out of the left and right sides of the bending punch to bend them downward, the lower die is also provided with a stripping device, the stripping device can push up the bent product when the upper die moves upward to open the die, a notch-shaped left forming block accommodating groove and a right forming block accommodating groove are respectively formed on both sides of the upper end of the bending punch, the left A left forming block and a right forming block are respectively movably arranged in the forming block accommodating groove and the right forming block accommodating groove, and a left reset driving device and a right reset driving device are also arranged in the lower mold, and the left reset driving device and the right reset driving device respectively drive the left forming block and the right forming block to move to the forming position and the disengaging position in the mold closing state and the mold opening state respectively, and the left side surface of the left forming block and the right side surface of the right forming block located at the forming position are respectively in close and flat contact with the left bending edge and the right bending edge of the bent product, and the left side surface of the left forming block and the right side surface of the right forming block located at the disengaging position form a gap with the left bending edge and the right bending edge of the bent product respectively.

[0005] As a further improvement of the utility model, the left reset drive device and the right reset drive device are a left elastic member and a right elastic member arranged in the lower mold, and the left elastic member and the right elastic member respectively provide upward elastic reset force to the left molding block and the right molding block, and the left molding block and the right molding block are subjected to the upward elastic force and can move from the molding position to the disengagement position, and the left molding block and the right molding block are subjected to the downward pressure of the upper mold and can overcome the elastic reset force of the left elastic member and the right elastic member and move from the disengagement position to the molding position.

[0006] As a further improvement of the present invention, the two side walls of the left forming block accommodating groove and the right forming block accommodating groove along the movement direction of the left forming block and the right forming block can respectively tightly abut against the side walls of the left forming block and the right forming block located at the forming position and the disengagement position, thereby enabling the left forming block and the right forming block to be stably located at the forming position and the disengagement position.

[0007] As a further improvement of the present invention, the left forming block and the right forming block are respectively installed in the left forming block accommodating groove and the right forming block accommodating groove so as to be rotatable in the left and right directions around a rotating shaft extending in the horizontal direction. The upper left edge of the left forming block and the upper right edge of the right forming block both form arc surfaces, which can be tightly pressed against the lower bottom surface of the formed product as the left forming block and the right forming block rotate. The lower section of the left side wall of the left forming block forms a right concave avoidance structure, and the lower section of the right side wall of the right forming block forms a left concave avoidance structure.

[0008] As a further improvement of the present invention, the lower right edge of the left forming block accommodating groove forms a left cylindrical groove of an opening structure, the lower left edge of the right forming block accommodating groove forms a right cylindrical groove of an opening structure, the lower right edge of the left forming block forms a cylindrical left rotating shaft, and the right lower left edge of the right forming block forms a cylindrical right rotating shaft, the left rotating shaft can be rotatably inserted in the left cylindrical groove, and the right rotating shaft can be rotatably inserted in the right cylindrical groove.

[0009] As a further improvement of the present invention, a raised positioning block is formed on the lower bottom surface of the left forming block accommodating groove and the right forming block accommodating groove, and a recessed positioning groove is formed on the lower side surface of the left forming block and the right forming block; or, a recessed positioning groove is formed on the lower bottom surface of the left forming block accommodating groove and the right forming block accommodating groove, and a raised positioning block is formed on the lower side surface of the left forming block and the right forming block, and when the left forming block and the right forming block are in the forming position, the raised positioning block is stopped and inserted in the recessed positioning groove.

[0010] As a further improvement of the present invention, the stripping device includes a left floating block, a right floating block, a left stripping elastic member, a right stripping elastic member, a left stripping push rod and a right stripping push rod. The left floating block and the right floating block can be respectively installed in the lower mold by sliding up and down a set distance. The upper ends of the left floating block and the right floating block can tightly abut against the left bending edge and the right bending edge end faces of the formed product. The left stripping elastic member and the right stripping elastic member provide an upward elastic retaining force to the left floating block and the right floating block. The left stripping push rod and the right stripping push rod are respectively fixedly installed on the upper mold, and the lower ends of the left stripping push rod and the right stripping push rod can respectively tightly abut against the left floating block and the right floating block, so that the height of the left floating block and the right floating block when the mold is closed is not higher than the height of the left bending edge and the right bending edge end faces of the product after forming.

[0011] As a further improvement of the utility model, the upper die is also elastically floatingly installed with a left stripping forming block and a right stripping forming block, and the lower end heights of the left stripping forming block and the right stripping forming block are lower than the lower end heights of the left bending punch and the right bending punch. The lower die is also fixedly installed with a left material strip forming block and a right material strip forming block. The left stripping forming block and the left material strip forming block are arranged opposite to each other to realize stamping or cutting of the connection point between the material strip and the left side of the product, and the right stripping forming block and the right material strip forming block are arranged opposite to each other to realize stamping or cutting of the connection point between the material strip and the right side of the product.

[0012] As a further improvement of the present invention, the lower right side of the left bending punch forms a left bending contact surface that matches the left bending edge and the bending root shape of the molded product, and the lower left side of the right bending punch forms a right bending contact surface that matches the right bending edge and the bending root shape of the molded product. The corner between the lower end of the left bending contact surface and the lower end surface of the left bending punch and the corner between the lower end of the right bending contact surface and the lower end surface of the right bending punch are respectively rotatably embedded with a left bending roller and a right bending roller. The outer cylindrical surfaces of the left bending roller and the right bending roller can roll in close contact with the material sheets extending out of the left and right sides of the bending punch, and the outer side walls of the left bending roller and the right bending roller are respectively aligned with the left bending contact surface and the right bending contact surface.

[0013] As a further improvement of the present utility model, the lower end face of the left bending punch forms an inclined surface with a left side height lower than the right side height, and the lower end face of the right bending punch forms an inclined surface with a right side height lower than the left side height, and the lower end face of the left bending punch is connected with the opening of the cylindrical groove for embedding the left bending roller through an arc surface transition, and the lower end face of the right bending punch is connected with the opening of the cylindrical groove for embedding the right bending roller through an arc surface transition.

[0014] The beneficial effects of the utility model are as follows: the utility model forms a left forming block accommodating groove and a right forming block accommodating groove on the left and right sides of the bending punch respectively, and the left forming block and the right forming block are movably installed therein; when the mold is closed, the left forming block and the right forming block are in a forming position, which are used to contact and support the bending edge of the material sheet to ensure the bending angle; when the mold is opened, the left forming block and the right forming block are synchronously moved to the disengagement position to separate them from the bending edge, thereby reducing the friction between the bending edge and the bending punch, and the product can be ejected from the bending punch by a relatively small stripping force, thereby realizing the stripping of the lower mold. The invention can realize the bending and smooth stripping of thick products with a simple structure. The left and right forming blocks of the invention are designed to be rotating structures. Even if the product is thick, when stripping, the left and right forming blocks can avoid the bending edges by rotating, and can also pry up the two sides of the bottom surface of the product close to the bending root, so that stripping is more labor-saving and smooth product stripping is ensured. The product will not be damaged during the stripping process. The invention has a simple structure and can avoid the cutting part of the material strip. The bending can be achieved while the product material strip is cut, thus avoiding two-step action, improving product forming efficiency and saving mold costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram of a bending and forming strip of a product in the prior art;

[0016] Figure 2 It is a structural principle diagram of a product bending forming mold in the prior art;

[0017] Figure 3 A diagram of a bending and forming strip of a product using the present invention;

[0018] Figure 4 It is a schematic diagram of the bending forming mold structure of the present invention;

[0019] Figure 5 This is a schematic diagram of the present invention in a fully opened mold state;

[0020] Figure 6 It is a schematic diagram of the contact state between the stripping plate and the material belt in the upper mold of the present invention;

[0021] Figure 7 It is a schematic diagram of the contact state between the stripping plate of the upper mold and the lower mold plate of the present invention;

[0022] Figure 8 This is a schematic diagram of the present invention in a fully molded state;

[0023] Fig. 9 It is a front view of the left bending punch of the present invention;

[0024] Fig.10 It is a front view of the right bending punch of the present invention;

[0025] Fig.11 It is a front view of the bending punch of the present invention;

[0026] Fig.12 It is the front view of the left forming block of the present invention;

[0027] Fig.13 It is a front view of the right forming block of the present invention;

[0028] Fig.14 It is a front view of the left floating block of the present invention;

[0029] Fig.15 It is the front view of the right floating block of the present invention. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0031] Embodiment: A bending die stripping and ejecting device comprises an upper die and a lower die, wherein the lower die is provided with a bending punch 1, and the upper die is provided with a left bending punch 2 and a right bending punch 3, wherein the upper die can be lifted and lowered and is located directly above the lower die, and the left bending punch 2 and the right bending punch 3 can press against the sheet 4 extending out of the left and right sides of the bending punch 1 to bend it downward, and the lower die is also provided with a stripping device, which can push up the bent product when the upper die moves upward to open the die, and the two sides of the upper end of the bending punch 1 are respectively formed with a notch-shaped left forming block accommodating groove 5 and a right forming block accommodating groove 6, wherein the left forming block accommodating groove 5 and the right forming block accommodating groove 6 are respectively formed with a notch-shaped left forming block accommodating groove 5 and a right forming block accommodating groove 6. A left forming block 7 and a right forming block 8 are movably arranged in the forming block accommodating groove 6, and a left reset driving device and a right reset driving device are also arranged in the lower mold. The left reset driving device and the right reset driving device respectively drive the left forming block 7 and the right forming block 8 to move to the forming position and the disengaging position in the mold closing state and the mold opening state respectively. The left side surface of the left forming block 7 and the right side surface of the right forming block 8 at the forming position are in close and flat contact with the left bending edge and the right bending edge of the bent product respectively, and the left side surface of the left forming block 7 and the right side surface of the right forming block 8 at the disengaging position form a gap with the left bending edge and the right bending edge of the bent product respectively.

[0032] The upper die is composed of an upper die base, an upper clamping plate 9, a deep fixing plate 10 and a stripping plate 11 from top to bottom. The upper clamping plate is fixedly connected to the upper die base and is used to fix and position the left bending punch 2 and the right bending punch 3. The deep fixing plate is fixedly connected to the stripping plate. The stripping plate is used to press the material. The deep fixing plate can be slidably installed on the lower side of the upper clamping plate in the up and down directions. The over-compression spring between the upper clamping plate and the deep fixing plate provides elastic force so that the deep fixing plate and the stripping plate can elastically move a certain distance in the up and down directions. The lower die is composed of a lower die base 12, a lower pad 13 and a lower template 14 fixed together from bottom to top. The lower template is used to fix and install the bending punch 1. The lower pad and the lower die base are used to slide up and down a set distance to install a stripping device. The stripping device lifts the product upward when the die is opened through the compression spring located in the lower die base.

[0033] When the product is bent, the material belt drives the sheet 4 to be bent to the top of the bending punch 1, and the part of the sheet 4 to be bent extends out of the set distance on the left and right sides of the bending punch 1 respectively. At this time, the left forming block 7 and the right forming block 8 in the left forming block accommodating groove 5 and the right forming block accommodating groove 6 are both in the disengaged position; the upper mold descends and starts to close the mold, and when the lower side of the stripping plate contacts the lower mold plate, the pressing structure closely contacts the upper side of the sheet 4, and the pressing structure presses the sheet 4 tightly on the bending punch 1, so that the sheet 4 is pressed and fixed. At the same time, the left forming block 7 and the right forming block 8 move to the forming position; with the upper mold seat and the upper clamp The plate continues to descend, and the left bending punch 2 and the right bending punch 3 begin to contact the upper surface of the sheet 4 extending out of the left and right sides of the bending punch 1. The portion of the sheet 4 extending out of the left and right sides of the bending punch 1 gradually bends downward as the left bending punch 2 and the right bending punch 3 descend. When the upper clamping plate is in close contact with the deep fixing plate, the upper die seat and the upper clamping plate stop descending and the mold is completely closed. At this time, the portion of the sheet 4 extending out of the left and right sides of the bending punch 1 is bent in place, and one side surface thereof is tightly attached to the left side surface of the left forming block 7 and the right side surface of the right forming block 8, and the other side surface thereof is tightly attached to the right side wall of the left bending punch 2 and the left side wall of the right bending punch 3;

[0034] When the mold is opened, the upper mold base begins to rise, and the left bending punch 2 and the right bending punch 3 rise synchronously and gradually separate from the left bending edge and the right bending edge of the product. At the same time, the deep fixing plate and the stripping plate remain stationary under the action of the compression spring, and the pressing structure thereon maintains a tight positioning on the upper side of the product; when the left bending punch 2 and the right bending punch 3 are completely separated from the left bending edge and the right bending edge of the product, the upper mold base continues to rise, and the deep fixing plate and the stripping plate begin to rise with it, and the pressing structure thereon gradually separates from the upper side of the product and finally forms a certain distance from the upper side of the product; when the pressing When the structure rises and separates from the upper side of the product, the left forming block 7 and the right forming block 8 move to the disengaged position under the action of the left reset drive device and the right reset drive device. At this time, a gap is formed between the left forming block 7 and the right forming block 8 and the left bending edge and the right bending edge of the product, and the stripping device in the lower mold pushes the product upward under the action of the compression spring. Since a gap is formed between the product and the left forming block 7 and the right forming block 8 on the bending punch 1 at this time, the friction between the product and the bending punch 1 is very small, and the product can be smoothly separated from the bending punch 1 under the action of the stripping device.

[0035] The above structure realizes the smooth demoulding of the symmetrical 90° bending structure of the product, avoids the occurrence of product demoulding failure, and at the same time prolongs the service life of the demoulding device.

[0036] The left reset driving device and the right reset driving device are a left elastic member 15 and a right elastic member 16 disposed in the lower mold. The left elastic member 15 and the right elastic member 16 provide upward elastic reset forces to the left molding block 7 and the right molding block 8 respectively. The left molding block 7 and the right molding block 8 are subjected to the upward elastic force and can move from the molding position to the disengagement position. The left molding block 7 and the right molding block 8 are subjected to the downward pressure of the upper mold and can overcome the elastic reset forces of the left elastic member 15 and the right elastic member 16 and move from the disengagement position to the molding position. The left molding block 7 and the right molding block 8 are driven to reciprocate by using the downward pressure of the upper mold and the left elastic member 15 and the right elastic member 16 that provide upward elastic reset forces. The structure is simple, no additional power is required, and the left molding block 7 and the right molding block 8 can be synchronized with the mold closing and mold opening.

[0037] The two side walls of the left molding block accommodating groove 5 and the right molding block accommodating groove 6 along the movement direction of the left molding block 7 and the right molding block 8 can respectively press against the side walls of the left molding block 7 and the right molding block 8 at the molding position and the disengaging position, thereby enabling the left molding block 7 and the right molding block 8 to be stably located at the molding position and the disengaging position. The movement range of the molding block and the right molding block 8 is limited by the side walls of the left molding block accommodating groove 5 and the right molding block accommodating groove 6, so that the left molding block 7 and the right molding block 8 that move to the molding position and the disengaging position cannot move forward any more, thereby enabling the left molding block 7 and the right molding block 8 to be accurately kept at the molding position when the mold is closed, and not to move too far to be reset when the mold is opened.

[0038] The left forming block 7 and the right forming block 8 are respectively installed in the left forming block accommodating groove 5 and the right forming block accommodating groove 6 so as to be rotatable in the left and right directions around the rotating shaft extending in the horizontal direction. The upper left edge of the left forming block 7 and the upper right edge of the right forming block 8 both form an arc surface 17. The arc surface 17 can be tightly pressed against the lower bottom surface of the formed product when the left forming block 7 and the right forming block 8 rotate. The lower section of the left side wall of the left forming block 7 forms a right concave avoidance structure 18, and the lower section of the right side wall of the right forming block 8 forms a left concave avoidance structure 19. By rotating the left and right forming blocks 7 and 8, a close fit or gap with the bent edge of the product can be achieved. When the left and right forming blocks 7 and 8 rotate, the arc surface 17 contacts the bottom surface of the lower side of the formed product to avoid scratching the lower surface of the product and to avoid being stuck and causing the left and right forming blocks 7 and 8 to fail to move. The left elastic member 15 and the right elastic member 16 can be compression springs in the vertical direction or torsion springs, which can be selected and installed as needed. In addition, the left and right forming blocks 7 and 8 can also be linear sliding structures in the left and right directions. The left elastic member 15 and the right elastic member 16 can drive the inclined block that moves vertically up and down, and the inclined block can push the left and right forming blocks 7 and 8 to slide left and right to achieve the above-mentioned function. This is an equivalent replacement that can be easily thought of by technicians in this field based on this patent and falls within the scope of protection of this patent.

[0039] The lower right edge of the left forming block receiving groove 5 forms a left cylindrical groove 3920 of an open structure, the lower left edge of the right forming block receiving groove 6 forms a right cylindrical groove 3921 of an open structure, the lower right edge of the left forming block 7 forms a cylindrical left rotating shaft 22, and the lower right left edge of the right forming block 8 forms a cylindrical right rotating shaft 23, the left rotating shaft 22 can be rotatably inserted in the left cylindrical groove 3920, and the right rotating shaft 23 can be rotatably inserted in the right cylindrical groove 3921. The structure is simple, and it is convenient to assemble the left forming block 7 and the right forming block 8, and the two have high strength after being combined, and are not easily damaged under pressure, and can also be hingedly installed through perforations and rotating shafts.

[0040] A raised positioning block 24 is formed on the bottom surface of the left molding block receiving groove 5 and the right molding block receiving groove 6, and a recessed positioning groove 25 is formed on the lower side of the left molding block 7 and the right molding block 8; or, a recessed positioning groove 25 is formed on the bottom surface of the left molding block receiving groove 5 and the right molding block receiving groove 6, and a raised positioning block 24 is formed on the lower side of the left molding block 7 and the right molding block 8. When the left molding block 7 and the right molding block 8 are in the molding position, the raised positioning block 24 is inserted and fixed in the recessed positioning groove 25. When the mold is closed, the raised positioning block 24 is plugged and matched with the recessed positioning groove 25 to achieve accurate positioning of the left molding block 7 and the right molding block 8, thereby ensuring the bending accuracy of the bending edge of the product. The corner positions of the raised positioning block 24 and the recessed positioning groove 25 are preferably rounded to avoid interference between the raised positioning block 24 and the recessed positioning groove 25 corners during the rotation of the left molding block 7 and the right molding block 8.

[0041] The stripping device includes a left floating block 26, a right floating block 27, a left stripping elastic member, a right stripping elastic member, a left stripping push rod 28 and a right stripping push rod 29. The left floating block 26 and the right floating block 27 can be installed in the lower mold and can slide up and down a set distance respectively. The upper ends of the left floating block 26 and the right floating block 27 can tightly abut against the left bending edge and the right bending edge end faces of the formed product. The left stripping elastic member and the right stripping elastic member provide an upward elastic retaining force to the left floating block 26 and the right floating block 27. The left stripping push rod 28 and the right stripping push rod 29 are respectively fixedly installed on the upper mold. The lower ends of the left stripping push rod 28 and the right stripping push rod 29 can tightly abut against the left floating block 26 and the right floating block 27 respectively, so that the height of the left floating block 26 and the right floating block 27 when the mold is closed is not higher than the height of the left bending edge and the right bending edge end faces of the product after molding. The left stripping push rod 28 and the right stripping push rod 29 are fixedly mounted on the deep fixing plate and the stripping plate of the upper mold. When the upper mold descends and closes until the stripping plate contacts the lower mold plate of the lower mold, the left stripping push rod 28 and the right stripping push rod 29 move downward with the upper mold against the left floating block 26 and the right floating block 27 in the lower mold to a position where the height is lower than the height of the end face of the bending edge after the product is formed and wait to avoid affecting the bending edge of the product during bending and forming. When the mold is opened, when the fixing plate and the stripping plate begin to move upward, the left stripping push rod 28 and the right stripping push rod 29 also begin to move upward. At this time, the left forming block 7 and the right forming block 8 begin to move to form a gap with the bending edge of the product. At the same time, the left floating block 26 and the right floating block 27 move upward under the action of the left stripping elastic member and the right stripping elastic member, and move upward against the left bending edge and the right bending edge of the product to achieve stripping.

[0042] The upper die is also provided with a left stripping forming block 30 and a right stripping forming block 31 which are elastically floating up and down, and the lower end heights of the left stripping forming block 30 and the right stripping forming block 31 are lower than the lower end heights of the left bending punch 2 and the right bending punch 3. The lower die is also fixedly provided with a left material strip forming block 32 and a right material strip forming block 33. The left stripping forming block 30 and the left material strip forming block 32 are arranged opposite to each other to realize stamping or cutting of the connection point between the material strip and the left side of the product, and the right stripping forming block 31 and the right material strip forming block 33 are arranged opposite to each other to realize stamping or cutting of the connection point between the material strip and the right side of the product. Since the stripping device of the present invention only needs a small force to realize the stripping of the bent product, the stripping device of the present invention has a simple structure, a small size, and occupies a small space. A material strip cutting and forming structure for forming or cutting the material strip can be provided at the same time as the bending step of the mold, so that the material strip cutting and bending forming of the product can be completed simultaneously.

[0043] A left bending contact surface 34 is formed on the lower right side of the left bending punch 2, which matches the left bending edge and the bending root shape of the molded product. A right bending contact surface 35 is formed on the lower left side of the right bending punch 3, which matches the right bending edge and the bending root shape of the molded product. A left bending roller 36 and a right bending roller 37 are respectively embedded in the corner between the lower end of the left bending contact surface 34 and the lower end surface of the left bending punch 2 and the corner between the lower end of the right bending contact surface 35 and the lower end surface of the right bending punch 3. The outer cylindrical surfaces of the left bending roller 36 and the right bending roller 37 can roll and tightly contact with the sheet 4 extending out of the left and right sides of the bending punch 1, and the outer side walls of the left bending roller 36 and the right bending roller 37 are aligned with the left bending contact surface 34 and the right bending contact surface 35, respectively. When the left and right sides of the sheet 4 are bent synchronously, the left bending punch 2 and the right bending punch 3 roll on the surface of the sheet 4 through the left bending roller 36 and the right bending roller 37 respectively, which effectively reduces the friction between the left bending punch 2 and the right bending punch 3 and the sheet 4, while avoiding damage to the left and right sides of the sheet 4, ensuring that the surface of the bending edge of the product is not damaged, and the left bending punch 2 and the right bending punch 3 also detach from the bending edge of the product by rolling when the mold is opened, which is beneficial to ensure that the bending punch of the upper mold is smoothly demolded from the product.

[0044] The lower end surface of the left bending punch 2 forms an inclined surface 38 whose left side height is lower than the right side height, and the lower end surface of the right bending punch 3 forms an inclined surface 38 whose right side height is lower than the left side height, and the lower end surface of the left bending punch 2 and the opening of the cylindrical groove 39 for embedding the left bending roller 36 are transitionally connected through the arc surface 17, and the lower end surface of the right bending punch 3 and the opening of the cylindrical groove 39 for embedding the right bending roller 37 are transitionally connected through the arc surface 17. The above structure makes the contact process between the material sheet 4 and the lower ends of the left bending punch 2 and the right bending punch 3 smoother when bending.

Claims

1. A bending die stripping and ejecting device, comprising an upper die and a lower die, wherein the lower die is provided with a bending punch (1), and the upper die is provided with a left bending punch (2) and a right bending punch (3), wherein the upper die can be lifted and lowered and is located directly above the lower die, and the left bending punch and the right bending punch can press against a sheet (4) extending out of the left and right sides of the bending punch to bend the sheet downward, and the lower die is also provided with a stripping device, wherein the stripping device can push up the bent product when the upper die moves upward to open the die, and the characteristics are as follows: A notch-shaped left forming block accommodating groove (5) and a right forming block accommodating groove (6) are respectively formed on both sides of the upper end of the bending punch. A left forming block (7) and a right forming block (8) are respectively movably arranged in the left forming block accommodating groove and the right forming block accommodating groove. A left reset driving device and a right reset driving device are also arranged in the lower mold. The left reset driving device and the right reset driving device respectively drive the left forming block and the right forming block to move to a forming position and a disengaging position in a mold closing state and a mold opening state respectively. The left side surface of the left forming block and the right side surface of the right forming block at the forming position are respectively in close contact with the left bending edge and the right bending edge of the bent product. The left side surface of the left forming block and the right side surface of the right forming block at the disengaging position form a gap with the left bending edge and the right bending edge of the bent product respectively.

2. The bending die stripping and ejecting device according to claim 1, characterized in that: The left reset driving device and the right reset driving device are a left elastic member (15) and a right elastic member (16) arranged in the lower mold. The left elastic member and the right elastic member respectively provide an upward elastic reset force to the left molding block and the right molding block. The left molding block and the right molding block are subjected to the upward elastic force and can move from the molding position to the disengagement position. The left molding block and the right molding block are subjected to the downward pressure of the upper mold and can overcome the elastic reset force of the left elastic member and the right elastic member and move from the disengagement position to the molding position.

3. The bending die stripping and ejecting device according to claim 1 or 2, characterized in that: The two side walls of the left forming block accommodating groove and the right forming block accommodating groove along the movement direction of the left forming block and the right forming block can respectively tightly abut against the side walls of the left forming block and the right forming block at the forming position and the disengagement position, thereby allowing the left forming block and the right forming block to be stably located at the forming position and the disengagement position.

4. The bending die stripping and ejecting device according to claim 1 or 2, characterized in that: The left forming block and the right forming block are respectively installed in the left forming block accommodating groove and the right forming block accommodating groove so as to be rotatable in the left and right directions around a rotating shaft extending in the horizontal direction. The upper left edge of the left forming block and the upper right edge of the right forming block both form arc surfaces (17). The arc surfaces can be tightly pressed against the lower bottom surface of the formed product when the left forming block and the right forming block rotate. The lower section of the left side wall of the left forming block forms a right concave avoidance structure (18), and the lower section of the right side wall of the right forming block forms a left concave avoidance structure (19).

5. The bending die stripping and ejecting device according to claim 4, characterized in that: The lower right edge of the left forming block receiving groove forms a left cylindrical groove (20) with an open structure, the lower left edge of the right forming block receiving groove forms a right cylindrical groove (21) with an open structure, the lower right edge of the left forming block forms a cylindrical left rotating shaft (22), and the lower right left edge of the right forming block forms a cylindrical right rotating shaft (23), the left rotating shaft can be rotatably inserted in the left cylindrical groove, and the right rotating shaft can be rotatably inserted in the right cylindrical groove.

6. The bending die stripping and ejecting device according to claim 4, characterized in that: A raised positioning block (24) is formed on the bottom surface of the left molding block accommodating groove and the right molding block accommodating groove, and a recessed positioning groove (25) is formed on the lower side surface of the left molding block accommodating groove and the right molding block; or, a recessed positioning groove is formed on the bottom surface of the left molding block accommodating groove and the right molding block accommodating groove, and a raised positioning block is formed on the lower side surface of the left molding block and the right molding block, and when the left molding block and the right molding block are in the molding position, the raised positioning block is inserted into the recessed positioning groove in a stop manner.

7. The bending die stripping and ejecting device according to claim 1, characterized in that: The stripping device comprises a left floating block (26), a right floating block (27), a left stripping elastic member, a right stripping elastic member, a left stripping push rod (28) and a right stripping push rod (29). The left floating block and the right floating block are respectively capable of sliding up and down a set distance and are installed in the lower mold. The upper ends of the left floating block and the right floating block can tightly abut against the left bending edge and the right bending edge end faces of the formed product. The left stripping elastic member and the right stripping elastic member provide an upward elastic retaining force to the left floating block and the right floating block. The left stripping push rod and the right stripping push rod are respectively fixedly installed on the upper mold. The lower ends of the left stripping push rod and the right stripping push rod can tightly abut against the left floating block and the right floating block, respectively, so that the height of the left floating block and the right floating block when the mold is closed is not higher than the height of the left bending edge and the right bending edge end faces of the formed product.

8. The bending die stripping and ejecting device according to claim 1 or 7, characterized in that: The upper die is also provided with a left stripping forming block (30) and a right stripping forming block (31) which are elastically floating up and down, and the lower ends of the left stripping forming block and the right stripping forming block are lower than the lower ends of the left bending punch and the right bending punch. The lower die is also fixedly provided with a left material strip forming block (32) and a right material strip forming block (33). The left stripping forming block and the left material strip forming block are arranged opposite to each other so as to realize stamping or cutting of the connection point between the material strip and the left side of the product, and the right stripping forming block and the right material strip forming block are arranged opposite to each other so as to realize stamping or cutting of the connection point between the material strip and the right side of the product.

9. The bending die stripping and ejecting device according to claim 1, characterized in that: The lower right side of the left bending punch forms a left bending contact surface (34) that matches the left bending edge and the bending root shape of the formed product, and the lower left side of the right bending punch forms a right bending contact surface (35) that matches the right bending edge and the bending root shape of the formed product. The corner between the lower end of the left bending contact surface and the lower end surface of the left bending punch and the corner between the lower end of the right bending contact surface and the lower end surface of the right bending punch are respectively rotatably embedded with a left bending roller (36) and a right bending roller (37). The outer cylindrical surfaces of the left bending roller and the right bending roller can roll and tightly contact with the material sheets extending out of the left and right sides of the bending punch, and the outer side walls of the left bending roller and the right bending roller are respectively aligned with the left bending contact surface and the right bending contact surface.

10. The bending die stripping and ejecting device according to claim 9, characterized in that: The lower end face of the left bending punch forms an inclined surface (38) whose left side height is lower than the right side height, and the lower end face of the right bending punch forms an inclined surface whose right side height is lower than the left side height. The lower end face of the left bending punch is connected with the opening of the cylindrical groove (39) for embedding the left bending roller through an arc surface transition, and the lower end face of the right bending punch is connected with the opening of the cylindrical groove for embedding the right bending roller through an arc surface transition.

Images