Mould for trough machining

Abstract

The utility model belongs to the technical field of trough product preparation, and particularly relates to a die for trough machining. Comprising a die set used for trough forming, the die set comprises a first stretching die, a second stretching die, a third stretching die, a trimming die and a bending die which are used in sequence, and the first stretching die, the second stretching die, the third stretching die, the trimming die and the bending die are each provided with an upper die and a lower die; the first stretching die, the second stretching die and the third stretching die are all provided with a shaping block and a shaping cavity which are the same in structure; the shaping block is composed of a conical cylinder with the arc-shaped top end and R-shaped protruding blocks arranged at the two ends of the conical cylinder. The shaping cavities are formed in the upper dies of the first drawing die, the second drawing die and the third drawing die, and the upper parts of the shaping blocks are just embedded into the shaping cavities after the dies are closed. The trough prepared by the mold can reduce grain blocking caused by included angles, and is convenient to clean.

Description

Technical Field

[0001] The utility model belongs to the technical field of material trough product preparation, and in particular relates to a mold for material trough processing. Background Art

[0002] In the livestock breeding industry, troughs are commonly used feeding tools. However, existing troughs always have various structural shortcomings, such as the angle that makes it easy for food to get stuck, so there will be certain inconveniences in feeding and cleaning. After the livestock finish eating each meal, food will stick to their necks, and then they will be carried to other places, which will cause the living environment conditions to deteriorate. Therefore, whether it is possible to design a trough processing mold to produce a trough that can reduce food sticking, avoid food stuck in the trough, and facilitate cleaning is a technical problem that this application wants to solve.

[0003] For example, the utility model with application number CN201921792171.7 discloses a suckling pig feed trough, including a horizontally arranged handle, a support frame arranged in a vertical plane, a feed trough, and a fixed frame connected to the handle and the feed trough; wherein the fixed frame is arranged at both ends of the handle and the feed trough; the support frame is composed of a rod with a rectangular cross section, including two support straight rods fixed to the ground and a support cross bar connecting the support straight rods; the feed trough includes two symmetrically arranged, which are respectively arranged in front and rear of the vertical plane where the support frame is located; the fixed frame is divided into two front and rear branches below the support cross bar, which are respectively connected to the feed troughs arranged in front and behind, and the front and rear branches of the fixed frame are jointly connected to the handle connecting part of the fixed frame, and together with the handle connecting part, form a lower opening structure straddling the support cross bar, so that the support frame supports the fixed frame, the handle and the feed trough. The suckling pig feed trough in the utility model can facilitate the feeding of suckling pigs. However, because the feed trough for holding food is a rectangular structure, when eating some wet food, it will cause the pigs to not be able to eat, resulting in the phenomenon of grain jam. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a mold for processing a material trough, and the material trough prepared by the mold can reduce the angle at which grains are stuck and is easy to clean.

[0005] The utility model discloses a die for processing a material trough: comprising a die set for forming a material trough, the die set comprising a first stretching die, a second stretching die, a third stretching die, a trimming die, and a bending die used in sequence, the first stretching die, the second stretching die, the third stretching die, the trimming die, and the bending die are all provided with an upper die and a lower die;

[0006] The first, second and third shaping blocks are respectively arranged on the lower dies of the first stretching die, the second stretching die and the third stretching die, and the structures of the first, second and third shaping blocks are the same; the first, second and third shaping cavities are respectively arranged on the upper dies of the first stretching die, the second stretching die and the third stretching die, and the structures of the first, second and third shaping cavities are the same;

[0007] The first shaping block, the second shaping block and the third shaping block each include a conical column with an arc-shaped top, and R-shaped protrusions arranged at both ends of the conical column;

[0008] After the mold is closed, the upper part of the first shaping block is exactly embedded in the first shaping cavity; the upper part of the second shaping block is exactly embedded in the second shaping cavity; and the upper part of the third shaping block is exactly embedded in the third shaping cavity.

[0009] Specifically, the lower die of the first stretching die includes a first base plate, the first shaping block and a first lower template; the first lower template is installed on the first base plate, the first lower template includes a first arc-shaped concave plate, and two first lower limit plates, the two first lower limit plates are respectively arranged at the two end positions of the first arc-shaped concave plate, and the two first lower limit plates are inclined; the first shaping block is longitudinally arranged on the first arc-shaped concave plate.

[0010] Further specifically, the upper die of the first stretching die includes a first upper fixed plate and a first upper mold plate arranged below the first upper fixed plate, the first upper mold plate includes the first molding cavity, a first arc-shaped convex plate, and two first upper limit plates respectively installed in parallel at both ends of the first arc-shaped convex plate, and the first molding cavity is opened on the first arc-shaped convex plate; after mold closing, the first upper limit plate contacts with the first lower limit plate, the first arc-shaped convex plate contacts with the first arc-shaped concave plate, and the first molding block matches with the first molding cavity.

[0011] Further specifically, the lower die of the second stretching die includes a second base plate, a second shaping block and a second lower die plate; the second lower die plate is installed on the second base plate, the second lower die plate includes a second arc-shaped concave plate, and two second lower limit plates, the two second lower limit plates are respectively arranged at the two end positions of the second arc-shaped concave plate, and the two second lower limit plates are arranged in parallel; the curvature of the second arc-shaped concave plate is greater than the curvature of the first arc-shaped concave plate.

[0012] To be more specific, an annular groove is arranged around the second shaping block on the second lower template, and the annular groove includes a rounded rectangular groove with openings at both ends, and arc-shaped grooves respectively arranged in parallel at the opening positions at both ends of the rounded rectangular groove; the second lower template is also provided with a group of first strip grooves arranged in parallel on the two second lower limit plates.

[0013] To be more specific, a second upper fixed plate and a second upper template arranged below the second upper fixed plate are provided on the upper mold of the second stretching template, the second upper template includes a second arc-shaped convex plate, two second upper limit plates, and a second molding cavity, and second strip convex strips are arranged in parallel on the two second upper limit plates; after mold closing, the second arc-shaped concave plate and the second arc-shaped convex plate, the second upper limit plate and the second lower limit plate, the second molding cavity and the second molding block are matched, and the first strip concave strip corresponds to the second strip convex strip.

[0014] To be more specific, a plurality of anti-demolding mechanisms are arranged on the third bottom plate of the third stretching die and on opposite sides of the third stretching die, the anti-demolding mechanisms include an anti-demolding plate vertically installed on the third bottom plate, a long strip slide groove is provided on the anti-demolding plate, and a plurality of positioning pins are arranged on the lower die of the third stretching die, and the ends of the plurality of positioning pins are respectively and one by one passed through and placed on the slide groove.

[0015] More specifically, a positioning block is provided on the lower die of the trimming die, and the setting position of the positioning block on the trimming die is the same as the position of the second shaping block on the second stretching die. The shape of the positioning block is the same as the inner opening structure of the trough product. The trough to be cut is placed upside down on the positioning block, and the outer bottom of the lower die of the trimming die is also provided with a bottom plate;

[0016] The upper mold of the trimming mold includes a positioning mold cavity and a trimming upper mold plate. The inner structure of the positioning mold cavity is the same as the structure of the trough product. The size of the positioning mold cavity is larger than that of the trough product. The positioning mold cavity is inverted on the trimming upper mold plate.

[0017] More specifically, the lower mold of the bending mold includes a bending lower mold plate, a positioning boss arranged on the upper surface of the bending lower mold plate, and a first annular clamping plate arranged on the periphery of the positioning boss. The arc-shaped structure of the upper surface of the positioning boss is the same as the outer side structure of the opening of the trough product. The upper surface of the positioning boss is also convexly provided with a limit block, and the limit block structure is the same as the inner opening structure of the trough product.

[0018] The upper mold of the bending mold includes a second annular clamping plate and two bending pieces symmetrically arranged on the inner side of the second annular clamping plate. After the mold is closed, the bottom ends of the two bending pieces are in contact with the positioning boss, and the contact point is on the positioning boss at the middle position between the first annular clamping plate and the limit block.

[0019] More specifically, the lower portion of the bending piece has the same bending arc as the outer edge of the trough product.

[0020] The beneficial effects of the utility model are:

[0021] Through the composition of the above-mentioned multiple molds, after three stretching, trimming and bending, the manufactured trough is smooth and has no angles, which greatly overcomes the problem of food angles. The prepared trough side design can reduce the food being taken away by livestock, reduce food pollution of the pig living environment, and bring convenience to the cleaning staff. This molding is first stretched three times to avoid the problems of raw material cracking, wrinkling and hair pulling that may be caused by one stretching, and then the outer side of the trough is formed by trimming and bending to ensure the flatness of the product periphery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The utility model is a product diagram of a material trough.

[0023] Figure 2 It is an overall schematic diagram of a first stretching die of a die for trough processing of the utility model.

[0024] Figure 3 It is a schematic diagram of a lower die of a first stretching die of a die for trough processing of the utility model.

[0025] Figure 4 This is a schematic diagram of the first upper die of a drawing die for trough processing of the utility model (the first upper fixed plate is hidden).

[0026] Figure 5 It is a schematic diagram of a second stretching die of a die for trough processing of the utility model.

[0027] Figure 6 It is a schematic diagram of a lower die of a second stretching die of a die for processing a material trough of the utility model.

[0028] Figure 7 This is a schematic diagram of the upper die of the second stretching die of a die for trough processing of the utility model (the second upper fixing plate is hidden).

[0029] Figure 8 It is a schematic diagram of a third stretching die of a die for trough processing of the utility model.

[0030] Fig. 9It is a schematic diagram of the lower die of the third stretching die of a die for trough processing of the utility model.

[0031] Fig.10 It is a schematic diagram of the third upper die of a die for trough processing of the utility model (the third upper fixed plate is hidden).

[0032] Fig.11 The utility model is a schematic diagram of a slicing die for a die used for processing a material trough.

[0033] Fig.12 The utility model is a schematic diagram of a lower die of a slicing die for a die used for processing a material trough.

[0034] Fig.13 The utility model is a schematic diagram of an upper die of a slicing die for a die for processing a material trough.

[0035] Fig.14 The utility model is a schematic diagram of a bending die for a die for processing a material trough.

[0036] Fig.15 The utility model is a schematic diagram of a bending die for a die for processing a material trough.

[0037] Fig.16 The utility model is a schematic diagram of a bending die for a die for processing a material trough.

[0038] Fig.17 The utility model is a schematic diagram of a shaping block of a mould for processing a material trough.

[0039] Figures indicate: 1: first stretching die, 11: first lower template, 12: first arc-shaped concave plate, 13: first lower limit plate, 14: first arc-shaped convex plate, 15: first upper limit plate, 16: first bottom plate, 17: first upper fixed plate, 18: first upper template, 2: second stretching die, 21: second arc-shaped concave plate, 22: second arc-shaped convex plate, 23: second bottom plate, 24: annular concave strip, 25: first strip concave strip, 26: second strip convex strip, 27: second upper fixed plate, 28: second lower limit plate, 29: second upper limit plate, 210: second lower template, 211: second upper template, 3: third stretching die, 31: anti-slip plate, 32 : Slide groove, 33: Positioning pin, 34: Third bottom plate, 4: Trimming mold, 41: Positioning block, 42: Positioning mold cavity, 43: Trimming upper template, 44: Trimming arc concave plate, 45: Trimming lower limit plate, 46: First trimming concave strip, 47: Second trimming concave strip, 5: Bending mold, 51: Bending lower template, 52: Positioning boss, 53: First annular clamping plate, 54: Limiting block, 55: Second annular clamping plate, 56: Bending sheet, 61: Conical cylinder, 62: R-shaped boss, 63: First shaping block, 64: Second shaping block, 65: Third shaping block, 71: First shaping cavity, 72: Second shaping cavity, 73: Third shaping cavity, 8: Material trough. DETAILED DESCRIPTION

[0040] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances.

[0042] It should be noted that in the present application, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0043] The following is combined with Figure 1-17 This application is further described in detail. For the sake of distinction, in this embodiment, the shaping block on the first stretching die

[0044] The embodiment of the present application discloses a die for processing a material trough, which includes a die set for forming a material trough 8. The die set includes a first stretching die 1, a second stretching die 2, a third stretching die 3, a trimming die 4, and a bending die 5 used in sequence.

[0045] The first stretching die 1, the second stretching die 2, the third stretching die 3, the trimming die 4, and the bending die 5 are all provided with an upper die and a lower die.

[0046] The first, second and third stretching dies 1, 2 and 3 are provided with a first shaping block 63, a second shaping block 64 and a third shaping block 65 on the lower dies, and the structures of the first, second and third shaping blocks 63, 64 and 65 are the same. The first, second and third stretching dies 1, 2 and 3 are provided with a first shaping cavity 71, a second shaping cavity 72 and a third shaping cavity 73 on the upper dies, and the structures of the first, second and third stretching dies 71, 72 and 73 are the same.

[0047] like Fig.17 The first shaping block 63 , the second shaping block 64 and the third shaping block 65 all include a conical column 61 with an arc-shaped top and R-shaped protrusions 62 arranged at both ends of the conical column 61 .

[0048] After mold closing, the upper part of the first molding block 63 is exactly embedded in the first molding cavity 71 ; the upper part of the second molding block 64 is exactly embedded in the second molding cavity 72 ; the upper part of the third molding block 65 is exactly embedded in the third molding cavity 73 .

[0049] The first stretching die 1, the second stretching die 2, and the third stretching die 3 can be installed on a 600T stretching machine for use, the trimming die 4 is installed on a 400T hydraulic press for use, and the bending die 5 is installed on a 200T hydraulic press for use.

[0050] Reference Figure 1-4 The lower die of the first stretching die 1 includes a first bottom plate 16, a first shaping block 63, and a first lower template 11. The first lower template 11 is installed on the first bottom plate 16, and the first lower template 11 includes a first arc-shaped concave plate 12 and two first lower limit plates 13, which are respectively arranged at the two ends of the first arc-shaped concave plate 12, and the two first lower limit plates 13 are inclined. The first shaping block 63 of the first stretching die is longitudinally arranged on the first arc-shaped concave plate 12.

[0051] The upper die of the first stretching die 1 includes a first upper fixed plate 17 and a first upper die plate 18 disposed below the first upper fixed plate 17. The first upper die plate 18 includes a first molding cavity 71, a first arc-shaped convex plate 14, and two first upper limit plates 15 respectively installed in parallel at both ends of the first arc-shaped convex plate 14. The first molding cavity 71 is opened on the first arc-shaped convex plate 14. After the mold is closed, the first upper limit plate 15 contacts the first lower limit plate 13, the first arc-shaped convex plate 14 contacts the first arc-shaped concave plate, and the first molding block 63 matches the first molding cavity 71.

[0052] Place the corner-cut material on the lower die of the first stretching die 1. The upper and lower dies of the first stretching die 1 are installed on a 600T stretching machine to perform one-time stretching in the trough 8 and micro-stretching on the side of the trough 8. After stretching, wait for the product to be ejected from the mold, take out the product, check the wrinkling degree on the left and right sides of the product, and pay attention to whether the R bottom edges on the top and back sides of the product are cracked. Stack the products neatly.

[0053] Reference Figure 5-7 The lower die of the second stretching die 2 includes a second bottom plate 23, a second shaping block 64, and a second lower die plate 210. The second lower die plate 210 is mounted on the second bottom plate 23, and the second lower die plate 210 includes a second arc-shaped concave plate 21 and two second lower limit plates 28, which are respectively arranged at the two ends of the second arc-shaped concave plate 21, and the two second lower limit plates 28 are arranged in parallel. The curvature of the second arc-shaped concave plate 21 is greater than that of the first arc-shaped concave plate 12.

[0054] The second lower mold plate 210 is provided with an annular groove 24 around the second shaping block 64, and the annular groove 24 includes a rounded rectangular groove with openings at both ends, and arc grooves respectively arranged in parallel at the openings at both ends of the rounded rectangular groove. The second lower mold plate 210 is also provided with a group of first strip grooves 25 arranged in parallel on the two second lower limit plates 28.

[0055] The upper die of the second drawing die is provided with a second upper fixing plate 27 and a second upper die plate 211 provided below the second upper fixing plate 27. The second upper die plate 211 includes a second arc-shaped convex plate 22, two second upper limit plates 29, and a second molding cavity 72. The two second upper limit plates 29 are provided with second strip convex strips 26 in parallel. After the die is closed, the second arc-shaped concave plate 21 and the second arc-shaped convex plate 22, the second upper limit plate 29 and the second lower limit plate 28, the second molding cavity 72 and the second molding block 64 are respectively matched, and the first strip concave strip 25 and the second strip convex strip 26 correspond.

[0056] When the trough 8 moves from the first stretching template to the second stretching die 2, the stretching oil is evenly brushed onto the second shaping block 64 of the lower die, the trough 8 that has been initially stretched is buckled onto the second shaping block 64, and then the stretching machine where the second stretching die is located is started to further stretch and shape the trough 8. In this process, the sides and the inside of the trough 8 are mainly stretched for the second time.

[0057] Reference Figure 8-10 , two anti-stripping mechanisms are arranged on the third bottom plate 34 of the third stretching die 3 and on the opposite sides of the third stretching die 3, the anti-stripping mechanism includes an anti-stripping plate 31 vertically mounted on the third bottom plate 34, the anti-stripping plate 31 is provided with a long strip slide 32, and the lower die of the third stretching die 3 is provided with two positioning pins 33, and the ends of the two positioning pins 33 are respectively placed through the slide 32 in a one-to-one correspondence. The trough 8 after the second stretching is placed on the third shaping block 65 in the third stretching die 3, and the stretching machine where the third stretching die 3 is located is started to further stretch and shape the trough 8. In this process, the side of the trough 8 is mainly sliced ​​and marked to facilitate the subsequent trimming operation on the trimming die 4. Except for the two anti-stripping mechanisms, the upper die and lower die structures of the third stretching die 3 are respectively the same as the upper die structure and lower die structure of the second stretching die 2.

[0058] Reference Figure 11-13 , a positioning block 41 is provided on the lower die of the trimming die 4. The positioning block 41 is provided at the same position on the trimming die 4 as the second shaping block 64 is provided on the second stretching die 2, and the shape of the positioning block 41 is the same as the inner opening structure of the trough 8 product. The trough 8 to be cut is placed upside down on the positioning block 41, and a bottom plate is also provided on the outer bottom of the lower die of the trimming die 4.

[0059] The remaining structures of the lower template of the trimming die 4 are the same as those of the lower template of the third stretching die 3. Specifically, the lower template of the trimming die 4 also includes a trimming arc concave plate 44, two trimming lower limit plates 45, a first trimming concave strip 46, and a second trimming concave strip 47. The installation structure and dimensions of the trimming arc concave plate 44, the two trimming lower limit plates 45, the first trimming concave strip 46, and the second trimming concave strip 47 on the lower template of the trimming die 4 are the same as the installation structure and dimensions of the second arc concave plate 21, the second lower limit plate 28, the annular concave strip 24, and the first strip concave strip 25 on the lower template of the second stretching die 2.

[0060] The upper mold of the trimming mold 4 includes a positioning mold cavity 42 and a trimming upper mold plate 43. The inner structure of the positioning mold cavity 42 is the same as the structure of the material trough 8 product. The size of the positioning mold cavity 42 is larger than that of the material trough 8 product. The positioning mold cavity 42 is inverted on the trimming upper mold plate 43.

[0061] This step is to put the trough 8 product after three stretching into the trimming die 4 to place the trimming edge. After cutting, first take out the cut scraps, and then take out the product to ensure that the edge of the trough 8 has no burrs.

[0062] Reference Figure 14-16 The lower mold of the bending mold 5 includes a bending lower mold plate 51, a positioning boss 52 arranged on the upper surface of the bending lower mold plate 51, and a first annular clamping plate 53 arranged on the periphery of the positioning boss 52. The arc structure on the upper surface of the positioning boss 52 is the same as the outer side structure of the opening of the material trough 8 product. The upper surface of the positioning boss 52 is also protruding with a limit block 54, and the structure of the limit block 54 is the same as the inner opening structure of the material trough 8 product.

[0063] The upper mold of the bending mold 5 includes a second annular clamping plate 55 and two bending pieces 56 symmetrically arranged inside the second annular clamping plate 55. After the mold is closed, the bottom ends of the two bending pieces 56 contact the positioning boss 52, and the contact point is located at the middle position between the first annular clamping plate 53 and the limit block 54 on the positioning boss 52. The lower part of the bending piece 56 has the same bending arc as the outer edge of the product in the trough 8. The purpose of this step is to put the trimmed product into the mold for side bending.

[0064] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A mold for trough processing, characterized in that: It includes a die set for trough forming, the die set includes a first stretching die, a second stretching die, a third stretching die, a trimming die, and a bending die used in sequence, and the first stretching die, the second stretching die, the third stretching die, the trimming die, and the bending die are all provided with an upper die and a lower die; The first, second and third shaping blocks are respectively arranged on the lower dies of the first stretching die, the second stretching die and the third stretching die, and the structures of the first, second and third shaping blocks are the same; the first, second and third shaping cavities are respectively arranged on the upper dies of the first stretching die, the second stretching die and the third stretching die, and the structures of the first, second and third shaping cavities are the same; The first shaping block, the second shaping block and the third shaping block each include a conical column with an arc-shaped top, and R-shaped protrusions arranged at both ends of the conical column; After the mold is closed, the upper part of the first shaping block is exactly embedded in the first shaping cavity; the upper part of the second shaping block is exactly embedded in the second shaping cavity; and the upper part of the third shaping block is exactly embedded in the third shaping cavity.

2. A trough processing mold according to claim 1, characterized in that: The lower die of the first stretching die includes a first bottom plate, the first shaping block and a first lower template; the first lower template is installed on the first bottom plate, the first lower template includes a first arc-shaped concave plate, and two first lower limit plates, the two first lower limit plates are respectively arranged at the two end positions of the first arc-shaped concave plate, and the two first lower limit plates are inclined; the first shaping block is longitudinally arranged on the first arc-shaped concave plate.

3. A trough processing mold according to claim 2, characterized in that: The upper die of the first stretching die includes a first upper fixed plate and a first upper mold plate arranged below the first upper fixed plate, the first upper mold plate includes the first molding cavity, a first arc-shaped convex plate, and two first upper limit plates respectively installed in parallel at both ends of the first arc-shaped convex plate, and the first molding cavity is opened on the first arc-shaped convex plate; after mold closing, the first upper limit plate contacts with the first lower limit plate, the first arc-shaped convex plate contacts with the first arc-shaped concave plate, and the first molding block matches with the first molding cavity.

4. A trough processing mold according to claim 3, characterized in that: The lower die of the second stretching die includes a second bottom plate, a second shaping block and a second lower die plate; the second lower die plate is installed on the second bottom plate, the second lower die plate includes a second arc-shaped concave plate, and two second lower limit plates, the two second lower limit plates are respectively arranged at the two end positions of the second arc-shaped concave plate, and the two second lower limit plates are arranged in parallel; the curvature of the second arc-shaped concave plate is greater than the curvature of the first arc-shaped concave plate.

5. A trough processing mold according to claim 4, characterized in that: The second lower template is provided with an annular groove around the second shaping block, and the annular groove includes a rounded rectangular groove with openings at both ends, and arc-shaped grooves respectively arranged in parallel at the opening positions at both ends of the rounded rectangular groove; the second lower template is also provided with a group of first strip grooves arranged in parallel on the two second lower limit plates.

6. A trough processing mold according to claim 5, characterized in that: The upper die of the second stretching die is provided with a second upper fixed plate and a second upper die plate arranged below the second upper fixed plate, the second upper die plate includes a second arc-shaped convex plate, two second upper limit plates, and a second molding cavity, and the two second upper limit plates are provided with second strip convex strips in parallel; after the die is closed, the second arc-shaped concave plate and the second arc-shaped convex plate, the second upper limit plate and the second lower limit plate, the second molding cavity and the second molding block are matched, and the first strip concave strip corresponds to the second strip convex strip.

7. A trough processing mold according to claim 6, characterized in that: A plurality of anti-demolding mechanisms are arranged on the third bottom plate of the third stretching die and on opposite sides of the third stretching die, the anti-demolding mechanisms include an anti-demolding plate vertically installed on the third bottom plate, a long strip slide groove is provided on the anti-demolding plate, a plurality of positioning pins are arranged on the lower die of the third stretching die, and the ends of the plurality of positioning pins are respectively and one by one passed through and placed on the slide groove.

8. A trough processing mold according to claim 7, characterized in that: A positioning block is provided on the lower die of the trimming die, and the setting position of the positioning block on the trimming die is the same as the position of the second shaping block on the second stretching die. The shape of the positioning block is the same as the inner opening structure of the trough product. The trough to be cut is placed upside down on the positioning block. The outer bottom of the lower die of the trimming die is also provided with a bottom plate; The upper mold of the trimming mold includes a positioning mold cavity and a trimming upper mold plate. The inner structure of the positioning mold cavity is the same as the structure of the trough product. The size of the positioning mold cavity is larger than that of the trough product. The positioning mold cavity is inverted on the trimming upper mold plate.

9. A trough processing mold according to claim 8, characterized in that: The lower mold of the bending mold includes a bending lower mold plate, a positioning boss arranged on the upper surface of the bending lower mold plate, and a first annular clamping plate arranged on the periphery of the positioning boss. The arc-shaped structure of the upper surface of the positioning boss is the same as the outer structure of the opening of the trough product. The upper surface of the positioning boss is also convexly provided with a limit block, and the limit block structure is the same as the inner opening structure of the trough product. The upper mold of the bending mold includes a second annular clamping plate and two bending pieces symmetrically arranged on the inner side of the second annular clamping plate. After the mold is closed, the bottom ends of the two bending pieces are in contact with the positioning boss, and the contact point is on the positioning boss at the middle position between the first annular clamping plate and the limit block.

10. A trough processing mold according to claim 9, characterized in that: The lower part of the bending piece has the same bending arc as the outer edge of the trough product.

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