A continuous mold for producing a box-shaped product

Abstract

The utility model discloses a kind of continuous moulds for box-shaped product production, for continuously punching processing into the box-shaped product of material belt, including lower mould and the upper mould of realizing opening and closing with lower mould, longitudinal cutting die, transverse cutting die, 90 degrees bending die, pre-bending die, secondary bending die and compacting die are sequentially arranged in the top of lower mould along material belt feeding direction, upper mould bottom sequentially sets up the longitudinal cutting male die, transverse cutting male die, 90 degrees bending male die, pre-bending male die, secondary bending male die, compacting male die upper and lower corresponding of longitudinal cutting die, transverse cutting die, 90 degrees bending die, pre-bending die, secondary bending die, compacting male die along material belt feeding direction respectively, such as cutting, 90 degrees bending, pre-bending, secondary bending, compacting and cutting off etc. Action can be completed simultaneously by a set of mould, reduce product manufacturing cost;Riveting operation does not need subsequent manual, product forming cycle is short, production efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of progressive die technology, specifically a progressive die for producing box-shaped products. Background Technology

[0002] A progressive die is a cold stamping die in which a press uses a strip of raw material to simultaneously complete multiple stamping processes at several different stations on a single die during a single stamping stroke. Each time the die completes a stamping stroke, the strip moves a fixed distance until the product is finished. Currently, after punching, cutting, and bending sheet metal for box-shaped products using progressive dies, the adjacent side panels of the final bent box cannot form a tight connection. Therefore, workers need to feed the box into a riveting fixture, where rivets are inserted between the side panels. The riveting fixture then deforms the rivets, riveting the adjacent side panels together. However, this box stamping and riveting method requires multiple sets of dies and fixtures, resulting in high manufacturing costs, a large number of workers, a long forming cycle, and low production efficiency. Summary of the Invention

[0003] The purpose of this utility model is to provide a continuous die for the production of box-shaped products. A single die can simultaneously complete actions such as cutting, 90-degree bending, pre-bending, secondary bending, pressing, and cutting. This results in low product manufacturing cost, short product forming cycle, and high production efficiency, thereby solving the problems of high stamping manufacturing cost, long forming cycle, and low production efficiency of existing box-shaped products mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A progressive die for producing box-shaped products is used to continuously stamp a strip of material into the box-shaped product. It includes a lower die and an upper die that opens and closes with the lower die. The top of the lower die, along the material feed direction, is sequentially provided with a longitudinal cutting die, a transverse cutting die, a 90-degree bending die, a pre-bending die, a secondary bending die, and a clamping die. The bottom of the upper die, along the material feed direction, is sequentially provided with longitudinal cutting punches, transverse cutting punches, 90-degree bending punches, pre-bending punches, secondary bending punches, and clamping punches, respectively corresponding to the longitudinal cutting die, transverse cutting die, 90-degree bending die, pre-bending punch, secondary bending punch, and clamping die.

[0005] Preferably, the longitudinal cutting punch includes a first cutter and a second cutter disposed opposite to each other at the bottom of the upper die. The side of the first cutter facing the second cutter has an outwardly protruding first wedge-shaped protrusion, and the side of the second cutter facing the first cutter has an inwardly concave first wedge-shaped groove. The shape of the first wedge-shaped protrusion is the same as the cross-sectional shape of the first wedge-shaped groove.

[0006] Preferably, the longitudinal cutting die includes two longitudinal cutting modules disposed opposite to each other on the top surface of the lower die, wherein one of the longitudinal cutting modules has a first longitudinal cutting edge adapted to the cross-sectional shape of the first cutter on its top surface, and the other longitudinal cutting module has a second longitudinal cutting edge adapted to the cross-sectional shape of the second cutter on its top surface.

[0007] Preferably, the top surface of the lower die has two symmetrically distributed first relief grooves, and the 90-degree bending die includes two lower bending blocks respectively embedded on the sides of the two first relief grooves; the 90-degree bending punch includes two upper bending blocks symmetrically arranged on the bottom surface of the upper die, and the two upper bending blocks are staggered vertically from the lower bending blocks on the same side.

[0008] Preferably, the lower die has a receiving groove on its top surface, and the pre-bending die includes a lower insert block disposed in the middle of the receiving groove. A second clearance groove is formed between the two sides of the lower insert block and the groove wall of the receiving groove, and two symmetrically distributed arc-shaped protrusions are formed on the top surface of the lower insert block.

[0009] Preferably, the pre-bending punch includes an upper pressure block embedded in the bottom of the upper die, and the bottom surface of the upper pressure block has an arc-shaped groove that matches the two arc-shaped protrusions.

[0010] Preferably, the secondary bending die includes a first die core extending axially in the receiving groove along the feeding direction, and a third clearance groove is formed between the two sides and the bottom surface of the first die core and the groove wall of the receiving groove; a second wedge-shaped protrusion is formed on the top surface of the first die core.

[0011] Preferably, the secondary bending punch includes an upper clamping block embedded in the bottom surface of the upper die, and the bottom surface of the upper clamping block has a second wedge-shaped groove that matches the second wedge-shaped protrusion.

[0012] Preferably, the pressing die includes a second die core extending axially in the receiving groove along the feeding direction, the second die core being integrally formed with the first die core, and the two having the same cross-sectional shape.

[0013] Preferably, the bottom wall of the receiving groove is provided with a support block located below the second mold core, and the pressing punch includes a forming block embedded in the bottom surface of the upper mold. The bottom surface of the forming block is provided with a product groove, and the groove wall of the product groove, the outer wall of the second mold core, and the top wall of the support block form a product cavity.

[0014] Compared with the prior art, the beneficial effects of this utility model are: cutting, 90-degree bending, pre-bending, secondary bending, pressing and cutting can be completed simultaneously with one set of molds, and the final box-shaped product is automatically snapped together without the need for multiple sets of molds and fixtures, thus reducing the product manufacturing cost; the entire stamping and forming process of the box-shaped product is automated, eliminating the need for subsequent manual riveting operations, shortening the product forming cycle, and thus improving production efficiency. Attached Figure Description

[0015] Figure 1 This is a perspective view of the box-shaped product to be processed according to this utility model; Figure 2 This is a schematic diagram of the material discharge formed after continuous stamping of the material strip according to this utility model; Figure 3 This is a perspective view of a progressive die for producing box-shaped products according to this utility model; Figure 4 This is an exploded view of a progressive die for producing box-shaped products according to this utility model; Figure 5 This is a perspective view of the lower mold of this utility model; Figure 6 This is a perspective view of the longitudinal cutting punch of this utility model; Figure 7 This is a cross-sectional view of the present invention at the positions of the 90-degree bending die and the 90-degree bending punch; Figure 8 This is a cross-sectional view of the present invention at the positions of the pre-bending die and the pre-bending punch; Figure 9 This is a cross-sectional view of the present invention at the positions of the secondary bending die and the secondary bending punch; Figure 10 This is a cross-sectional view of the present invention at the positions of the clamping die and the clamping punch.

[0016] In the diagram: 1. Box-shaped product; 11. Side panel; 12. Top panel; 13. Bottom panel; 14. Snap-fit ​​protrusion; 15. Snap-fit ​​groove; 16. Inner cavity; 2. Lower mold; 21. Longitudinal cutting module; 211. First longitudinal cutting edge; 212. Second longitudinal cutting edge; 22. Cross-cutting module; 23. Lower bending block; 24. Lower insert; 241. Arc-shaped protrusion; 25. First mold core; 251. Second wedge-shaped protrusion; 26. Second mold core; 27. Punch; 28. First clearance groove; 29. ​​Second clearance groove; 210. Third clearance groove; 3. Upper die; 31. First cutter; 311. First wedge-shaped protrusion; 32. Second cutter; 321. First wedge-shaped groove; 33. Third cutter; 34. Upper bending block; 35. Upper pressure block; 351. Arc-shaped groove; 36. Upper clamping block; 361. Second wedge-shaped groove; 37. Forming block; 38. Punch; 4. Strip material; 41. Semi-finished product one; 42. Semi-finished product two; 43. Semi-finished product three; 44. Semi-finished product four; 5. Support block; 6. Guide hole. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "more than" means two or more, unless otherwise explicitly specified. In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] Please see Figure 1 The box-shaped product 1 to be processed by this utility model includes two oppositely arranged side plates 11, a top plate 12 connected to the top of the side plates 11, and a bottom plate 13 connected to the bottom of the side plates 11. The bottom plate 13 is fastened together by its oppositely arranged protrusions 14 and grooves 15. The two side plates 11, the top plate 12, and the bottom plate 13 form an inner cavity 16. In this embodiment, the connection between the top plate 12 and the side plates 11 of the box-shaped product 1 is transitioned by a rounded corner, and the cross-section of the top plate 12 is trapezoidal.

[0020] Please see Figure 2-10 A progressive die for producing box-shaped products, used to continuously stamp strip 4 into shapes such as... Figure 1The box-shaped product 1 shown is designed so that it can be tightly fastened by the latching protrusions 14 and slots 15 on its base plate 13. The progressive die for producing the box-shaped product includes a lower die 2 and an upper die 3 that opens and closes with the lower die 2. Please refer to [link / reference]. Figure 4 The top of the lower die 2 is along the feeding direction of the strip 4 (e.g., Figure 4 (As indicated by the arrow) are arranged in sequence a longitudinal cutting die, a transverse cutting die, a 90-degree bending die, a pre-bending die, a secondary bending die, and a clamping die. The bottom of the upper die 3 is arranged along the feeding direction of the strip 4 with longitudinal cutting punches, transverse cutting punches, 90-degree bending punches, pre-bending punches, secondary bending punches, and clamping punches respectively corresponding to the longitudinal cutting die, transverse cutting die, 90-degree bending die, pre-bending punch, secondary bending punch, and clamping die.

[0021] Please see Figure 2 as well as Figure 4 During processing, the upper die 3 is pressed down by the press. The longitudinal cutting punch and the longitudinal cutting die together cut the two edges of the strip 4 to form the card protrusion 14 and card groove 15 of the box-shaped product 1. The transverse cutting punch and the transverse cutting die together cut the strip 4 into semi-finished product 1 41. The 90-degree bending punch and the 90-degree bending die together bend the two ends of the semi-finished product 1 41 by 90 degrees to form semi-finished product 2 42. The pre-bending punch and the pre-bending die together bend the two ends of the semi-finished product 2 42 upwards again at a certain angle. The pre-bending angle is preferably 30-60 degrees to form semi-finished product three 43. Then, the secondary bending punch and the secondary bending die bend the semi-finished product three 43 downward at a certain angle to form semi-finished product four 44. In this embodiment, the secondary bending angle is preferably 30-60 degrees. At this time, the snap-fit ​​protrusion 14 and the snap-fit ​​groove 15 of the semi-finished product four 44 have been completed. Finally, the semi-finished product four 44 is pressed into shape by the pressing punch and the pressing die, and at the same time, the semi-finished product four 44 is cut into box-shaped product 1.

[0022] This invention can simultaneously complete cutting, 90-degree bending, pre-bending, secondary bending, pressing and cutting with a single mold. The final box-shaped product 1 is automatically snapped together without the need for multiple sets of molds and fixtures, thus reducing product manufacturing costs. The entire stamping process of the box-shaped product 1 is automated, eliminating the need for subsequent manual riveting operations, shortening the product forming cycle and improving production efficiency.

[0023] Please see Figure 5-6The longitudinal cutting punch includes a first cutter 31 and a second cutter 32 disposed opposite to each other at the bottom of the upper die 3. The side of the first cutter 31 facing the second cutter 32 has an outwardly protruding first wedge-shaped protrusion 311, and the side of the second cutter 32 facing the first cutter 31 has an inwardly concave first wedge-shaped groove 321. In this embodiment, the shape of the first wedge-shaped protrusion 311 is the same as the cross-sectional shape of the first wedge-shaped groove 321, so that the slot 15 cut by the first cutter 31 and the protrusion 14 cut by the second cutter 32 can form a tight connection after a second bending. The cross-sectional shape of the first wedge-shaped protrusion 311 and the first wedge-shaped groove 321 adopts one of the following geometric shapes: wedge, trapezoid, triangle, semicircle, etc.

[0024] Please see Figure 5 The longitudinal cutting die includes two longitudinal cutting modules 21 disposed opposite to each other on the top surface of the lower die 2. One of the longitudinal cutting modules 21 has a first longitudinal cutting edge 211 on its top surface that adapts to the cross-sectional shape of the first cutter 31, and the other longitudinal cutting module 21 has a second longitudinal cutting edge 212 on its top surface that adapts to the cross-sectional shape of the second cutter 32. Through the cooperation between the cutter and the cutting edge, the edge of the strip 4 is cut into the shapes required for the box-shaped product 1, such as the card protrusion 14 and the card groove 15.

[0025] In this embodiment, please refer to Figure 4 The bottom of the upper die 3 is provided with a plurality of punches 38 between the first cutter 31 and the second cutter 32. The shape of the plurality of punches 38 can be set to any geometric shape according to actual needs, such as a circle, a square, a triangle, etc. The shape and number of the plurality of punches 38 are not limited and can be arranged in any combination. The top surface of the lower die 2 is provided with punch holes 27 that are adapted to the plurality of punches 38. Through the cooperation of the punches 38 and the punch holes 27, the required hole shape of the product is punched on the strip 4.

[0026] Please see Figure 4-5 The transverse cutting punch includes two third cutters 33 symmetrically arranged at the bottom of the upper die 3, and the transverse cutting die includes two transverse cutting modules 22 symmetrically arranged on the top surface of the lower die 2. The two transverse cutting modules 22 are respectively provided with transverse cutting edges adapted to the third cutters 33.

[0027] Please see Figure 4-5 as well as Figure 7The lower die 2 has two symmetrically distributed first relief grooves 28 on its top surface. The 90-degree bending die includes two lower bending blocks 23 respectively embedded in the sides of the two first relief grooves 28. In this embodiment, the two lower bending blocks 23 are positioned close to the middle of the lower die 2 within the first relief grooves 28. The 90-degree bending punch includes two upper bending blocks 34 symmetrically arranged on the bottom surface of the upper die 3. The two upper bending blocks 34 are staggered vertically with the lower bending blocks 23 on the same side, so that when the upper die 3 is pressed down, the two upper bending blocks 34 bend the two ends of the semi-finished product 1 41 downward by 90 degrees to form the semi-finished product 2 42. At this time, the inner walls of the two sides of the semi-finished product 2 42 are attached to the sides of the lower bending blocks 23.

[0028] Please see Figure 4-5 as well as Figure 8 The lower die 2 has a receiving groove on its top surface. The pre-bending die includes a lower insert 24 located in the middle of the receiving groove. Second clearance grooves 29 are formed between the lower insert 24 and the groove wall on both sides to provide space for bending at both ends of the product. In this embodiment, the lower insert 24 has two symmetrically distributed arc-shaped protrusions 241 on its top surface. The pre-bending die includes an upper pressure block 35 embedded in the bottom of the upper die 3. The bottom surface of the upper pressure block 35 has arc-shaped grooves 351 that fit the two arc-shaped protrusions 241. When the upper die 3 presses down to form the product, the upper pressure block 35, through its two arc-shaped grooves 351 and in conjunction with the two arc-shaped protrusions 241 of the lower insert 24, pre-bends both ends of the semi-finished product 42 from the previous process upwards at a certain angle to form the semi-finished product 43.

[0029] Please see Figure 4-5 as well as Figure 9 The secondary bending die includes a first die core 25 extending axially along the feeding direction within a receiving groove. A third clearance groove 210 is formed between the two sides and the bottom surface of the first die core 25 and the wall of the receiving groove to provide space for product swinging. A second wedge-shaped protrusion 251 protruding upward is formed on the top surface of the first die core 25. The secondary bending punch includes an upper clamping block 36 embedded in the bottom surface of the upper die 3. The bottom surface of the upper clamping block 36 has a second wedge-shaped groove 361 adapted to the second wedge-shaped protrusion 251. In this embodiment, the cross-sectional shape of the first die core 25 is the same as the cross-sectional shape of the inner cavity 16 of the box-shaped product 1. When the upper mold 3 is pressed down relative to the lower mold 2, the upper clamping block 36, through its second wedge-shaped groove 361, cooperates with the second wedge-shaped protrusion 251 of the first mold core 25 to bend the semi-finished product three 43 from the previous process again, so that the semi-finished product three 43 covers the outer peripheral surface of the first mold core 25 to form the semi-finished product four 44. At this time, the semi-finished product four 44 has been fastened by the snap-fit ​​protrusion 14 and the snap-fit ​​groove 15.

[0030] Please see Figure 4-5 as well as Figure 10The pressing die includes a second mold core 26 extending axially along the feeding direction within a receiving groove. The second mold core 26 and the first mold core 25 are integrally formed, and both have the same cross-sectional shape. A support block 5 located below the second mold core 26 is provided on the bottom wall of the receiving groove. The pressing punch includes a forming block 37 embedded in the bottom surface of the upper die 3. A product groove is formed on the bottom surface of the forming block 37. The groove wall of the product groove, the outer wall of the second mold core 26, and the top wall of the support block 5 form a product cavity. When the upper die 3 presses down relative to the lower die 2, the forming block 37, together with the second mold core 26 and the support block 5, presses the semi-finished product 44 into a box-shaped product 1, preventing the buckles of the semi-finished product 44 from being loosely connected to the slots 15, thereby improving the connection tightness of the box-shaped product 1.

[0031] Please see Figure 5 The lower insert 24 and the top surface of the first mold core 25 are each provided with a plurality of guide holes 6. The bottom of the upper pressure block 35 and the upper clamping block 36 are each provided with guide pins inserted into the guide holes 6. In this embodiment, the shape of the plurality of guide holes 6 is consistent with the shape of the punch 27, so that the guide pins pass through the strip 4 to position the strip 4 and prevent the strip 4 from shifting during processing. Please refer to Figure 4-5 A cutting blade is provided between the upper clamping block 36 and the forming block 37 to cut the strip 4 into box-shaped product 1; a discharge port for discharging waste material is provided at the connection between the first mold core 25 and the second mold core 26.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A progressive die for producing box-shaped products, used for continuously stamping strips into said box-shaped products, comprising a lower die and an upper die that opens and closes with the lower die, characterized in that: The lower die top is provided with a longitudinal cutting die, a transverse cutting die, a 90-degree bending die, a pre-bending die, a secondary bending die, and a pressing die in sequence along the material feeding direction. The upper die bottom is provided with longitudinal cutting punches, transverse cutting punches, 90-degree bending punches, pre-bending punches, secondary bending punches, and pressing punches in sequence along the material feeding direction, respectively corresponding to the longitudinal cutting die, transverse cutting die, 90-degree bending die, pre-bending punch, secondary bending punch, and pressing die.

2. The progressive die for producing box-shaped products according to claim 1, characterized in that: The longitudinal cutting punch includes a first cutter and a second cutter disposed opposite to each other at the bottom of the upper die. The side of the first cutter facing the second cutter has an outwardly protruding first wedge-shaped protrusion, and the side of the second cutter facing the first cutter has an inwardly concave first wedge-shaped groove. The shape of the first wedge-shaped protrusion is the same as the cross-sectional shape of the first wedge-shaped groove.

3. The progressive die for producing box-shaped products according to claim 2, characterized in that: The longitudinal cutting die includes two longitudinal cutting modules disposed opposite to each other on the top surface of the lower die. One of the longitudinal cutting modules has a first longitudinal cutting edge adapted to the cross-sectional shape of the first cutter on its top surface, and the other longitudinal cutting module has a second longitudinal cutting edge adapted to the cross-sectional shape of the second cutter on its top surface.

4. The progressive die for producing box-shaped products according to claim 1, characterized in that: The lower die has two symmetrically distributed first relief grooves on its top surface. The 90-degree bending die includes two lower bending blocks respectively embedded on the sides of the two first relief grooves. The 90-degree bending punch includes two upper bending blocks symmetrically arranged on the bottom surface of the upper die. The two upper bending blocks and the lower bending blocks on the same side are staggered vertically.

5. The progressive die for producing box-shaped products according to claim 1, characterized in that: The lower die has a receiving groove on its top surface. The pre-bending die includes a lower insert block disposed in the middle of the receiving groove. A second clearance groove is formed between the two sides of the lower insert block and the groove wall of the receiving groove. Two symmetrically distributed arc-shaped protrusions are formed on the top surface of the lower insert block.

6. The progressive die for producing box-shaped products according to claim 5, characterized in that: The pre-bending punch includes an upper pressure block embedded in the bottom of the upper die, and the bottom surface of the upper pressure block has an arc-shaped groove that matches the two arc-shaped protrusions.

7. The progressive die for producing box-shaped products according to claim 5, characterized in that: The secondary bending die includes a first die core extending axially in the receiving groove along the feeding direction, and a third clearance groove is formed between the two sides and the bottom surface of the first die core and the groove wall of the receiving groove; a second wedge-shaped protrusion is formed on the top surface of the first die core.

8. The progressive die for producing box-shaped products according to claim 7, characterized in that: The secondary bending punch includes an upper clamping block embedded in the bottom surface of the upper die, and the bottom surface of the upper clamping block has a second wedge-shaped groove that matches the second wedge-shaped protrusion.

9. The progressive die for producing box-shaped products according to claim 7, characterized in that: The clamping die includes a second die core extending axially in the receiving groove along the feeding direction. The second die core is integrally formed with the first die core, and the two have the same cross-sectional shape.

10. The progressive die for producing box-shaped products according to claim 9, characterized in that: The bottom wall of the receiving groove is provided with a support block located below the second mold core. The pressing punch includes a forming block embedded in the bottom surface of the upper mold. The bottom surface of the forming block has a product groove. The groove wall of the product groove, the outer wall of the second mold core, and the top wall of the support block form a product cavity.

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