An outdoor stove flow tube top edge rolling forming mold

Abstract

This utility model relates to a molding die for forming the top edge of an outdoor furnace flow tube, belonging to the technical field of edge-rolling processing molds. The die includes an upper die and a lower die. The upper die includes an upper template, an upper die base, and an edge-rolling structure. The upper die base is composed of a first cylindrical segment and a second cylindrical segment, which are coaxially integrally formed. The connection between the second end of the first cylindrical segment and the second cylindrical segment forms a first stepped surface with a sudden change in diameter. The edge-rolling mechanism is circumferentially arranged on the first stepped surface along the outer circumference of the second cylindrical segment, and includes a vertical guide segment and an arc-shaped edge-rolling segment. When the fully open flow tube is placed into the lower die, the upper die with the edge roll is pressed down. The edge of the flow tube with the opening contacts the vertical guide segment of the edge-rolling mechanism, and an arc-shaped edge is formed along the arc-shaped edge-rolling segment of the edge-rolling mechanism. This utility model can save processing steps for the flow tube and improve the edge-rolling efficiency of the flow tube.

Description

Technical Field

[0001] This utility model relates to the field of edge-rolling processing mold technology, and more specifically to an edge-rolling forming mold for the top edge of an outdoor furnace flow tube. Background Technology

[0002] Outdoor stoves are a common type of outdoor cooking equipment. The stove body includes a flow coil, the top edge of which typically needs to be rolled to form a smooth, curved edge, preventing sharp edges from cutting users. In the manufacturing process of the flow coil, the rolling die plays a crucial role, its performance directly affecting the processing quality and efficiency of the flow coil.

[0003] Currently, existing edge-rolling dies have significant technical drawbacks when edge-rolling flow coilers with the flow coiler fully open at the top. When the flow coiler is fully open at the top, existing edge-rolling dies struggle to achieve the desired curved edge effect, resulting in low edge-rolling efficiency and poor edge quality that fails to meet actual production requirements. Furthermore, to meet the flow coiler's usage requirements, it is often necessary to open it after edge-rolling, which undoubtedly increases the number of processing steps, consuming more time and labor costs and reducing overall production efficiency.

[0004] Therefore, how to develop a curling mold that can efficiently and effectively achieve arc-shaped curling with high quality when the top of the flow tube is fully open, while simplifying the processing steps, has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the present invention provides an outdoor furnace flow tube top edge rolling forming mold to address the technical problem of low rolling efficiency of the existing outdoor furnace rolling mold.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides an outdoor furnace flow tube top edge rolling forming mold, including an upper mold and a lower mold; wherein, the upper mold includes an upper template, an upper mold base and a rolling structure;

[0008] The upper mold base is composed of a first cylindrical segment and a second cylindrical segment. The first cylindrical segment and the second cylindrical segment are coaxially integrally formed, and the diameter of the first cylindrical segment is larger than the diameter of the second cylindrical segment. The connection between the second end of the first cylindrical segment and the second cylindrical segment forms a first stepped surface with a sudden change in diameter. The first end of the first cylindrical segment is connected to the upper mold plate.

[0009] The hemming mechanism is arranged in a ring along the outer circular surface of the second cylindrical segment on the first stepped surface, and the hemming mechanism includes a vertical guide segment and an arc-shaped hemming segment;

[0010] The lower mold includes a lower template, a first lower die, and a second lower die;

[0011] The first lower die and the second lower die are hollow cylinders with the same outer diameter. The second end of the first lower die is connected to the first end of the second lower die through an elastic element, forming a coaxial connection structure that can be elastically displaced axially. The second end of the second lower die is connected to the lower template.

[0012] The hollow cavity inside the first lower die has the same diameter as the hollow cavity inside the second lower die. The cavity diameter is larger than the diameter of the second cylindrical segment and smaller than the diameter of the first cylindrical segment.

[0013] The present invention is further configured such that: N cylindrical grooves are provided on the first end face of the second lower die along the circumferential direction, and N cylindrical grooves of the same size are provided on the second end of the first lower die along the circumferential direction, coaxially corresponding to the cylindrical grooves of the second lower die; an elastic element is provided in the cylindrical groove, and the two ends of the elastic element respectively abut against the bottom surface of the cylindrical groove of the second lower die and the bottom surface of the cylindrical groove of the first lower die.

[0014] The present invention is further configured such that: the elastic element includes a cylindrical pin and a cylindrical spring, and one end of the cylindrical pin is connected to one end of the cylindrical spring.

[0015] The present invention is further configured such that: a limiting groove is provided on the lower template, the width of the limiting groove is the same as the outer diameter of the second end of the second lower die; the second end of the second lower die abuts against the bottom surface of the limiting groove.

[0016] The present invention is further configured such that: a limiting post is provided on the lower template, one end of the limiting post is connected to the lower template, and a limiting block is provided at the other end of the limiting post; the first end of the first lower die is adjacent to the limiting block, and the distance between the first end of the first lower die and the limiting block is 10~20mm.

[0017] The present invention is further configured such that: a first connecting plate is provided on the side of the limiting post, and a second connecting plate is provided on the outer shell of the second lower die; both the first connecting plate and the second connecting plate are provided with through holes; the limiting post and the second lower die are fixedly connected by bolts passing through the through holes and being locked with nuts.

[0018] In summary, this utility model has the following beneficial effects:

[0019] This invention features an upper mold with a stepped cylindrical section and a circumferentially rolled edge mechanism on the stepped surface, and a lower mold with a hollow cylinder to hold the flow tube. After the fully open flow tube is placed into the cavity of the lower mold, the upper mold with the rolled edge mechanism presses down, and the second cylinder of the upper mold enters the flow tube. When the upper mold presses down, it provides support for the side of the flow tube. At the same time, the open edge of the flow tube contacts the rolled edge mechanism. During the continuous pressing down of the upper mold, the edge of the flow tube's opening forms an arc-shaped rolled edge along the rolled edge mechanism. With the top fully open, the arc-shaped rolled edge of the flow tube is achieved, eliminating the need to open the flow tube after rolling the edge, saving processing steps and improving the rolling edge processing efficiency of the flow tube. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the outdoor stove flow tube top edge rolling forming mold of this utility model;

[0021] Figure 2 This is a schematic diagram of the mold structure of this utility model excluding the upper and lower templates;

[0022] Figure 3 This is a schematic diagram of the upper mold base of this utility model;

[0023] Figure 4 This is a top view of the template of this utility model;

[0024] Figure 5 This is a cross-sectional view of the template of this utility model;

[0025] Figure 6 This is a schematic diagram of the assembly structure of the first and second lower dies of this utility model;

[0026] Figure 7 This is a cross-sectional view of the first lower die of this utility model;

[0027] Figure 8 This is a cross-sectional view of the second lower die of this utility model;

[0028] Figure 9 This is a top view of the lower template of this utility model;

[0029] Figure 10 This is a cross-sectional view of the lower template of this utility model;

[0030] Figure 11 This is a schematic diagram of the lower mold structure with limit posts of this utility model;

[0031] Reference numerals: 1. Upper template; 2. Upper mold base; 21. First cylindrical segment; 22. Second cylindrical segment; 3. Hemming mechanism; 31. Vertical guide segment; 32. Arc-shaped hemming segment; 4. Lower template; 5. First lower die; 6. Second lower die; 7. Elastic element; 71. Cylindrical pin; 72. Cylindrical spring; 8. Mounting hole; 9. Stepped fixing hole; 10. First stepped surface; 11. Cylindrical groove; 12. First outer shell; 13. Second outer shell; 14. Third stepped surface; 15. First cylindrical cavity; 16. Second cylindrical cavity; 17. Second stepped surface; 18. Limiting groove; 19. Limiting post; 20. Limiting block. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings.

[0033] To make the objectives, solutions, and advantages of this utility model clearer, the following detailed description of this utility model is provided in conjunction with the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0034] In the description of this utility model, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0035] The following is in conjunction with the appendix of this utility model. Figures 1-11 The embodiments of this utility model will be described in detail below.

[0036] Example 1:

[0037] Reference Figure 1 and Figure 2 As shown, an outdoor furnace flow tube top edge rolling forming mold includes an upper mold and a lower mold. The upper mold includes an upper template 1, an upper mold base 2, and a rolling structure.

[0038] Reference Figure 3 As shown, the upper mold base 2 is composed of a first cylindrical segment 21 and a second cylindrical segment 22. The first cylindrical segment 21 and the second cylindrical segment 22 are coaxially integrally formed, and the diameter of the first cylindrical segment 21 is larger than the diameter of the second cylindrical segment 22. The connection between the second end of the first cylindrical segment 21 and the second cylindrical segment 22 forms a first stepped surface 10 with a sudden change in diameter. The first end of the first cylindrical segment 21 is connected to the upper mold plate 1.

[0039] The hemming mechanism 3 is arranged in a ring on the first stepped surface 10 along the outer circular surface of the second cylindrical segment 22, and the hemming mechanism 3 includes a vertical guide segment 31 and an arc-shaped hemming segment 32.

[0040] The lower mold includes a lower template 4, a first lower die 5, and a second lower die 6.

[0041] Reference Figure 6 As shown, the first lower die 5 and the second lower die 6 are hollow cylinders with the same outer diameter. The second end of the first lower die 5 is connected to the first end of the second lower die 6 through an elastic element 7, forming a coaxial connection structure that can be elastically displaced axially. The second end of the second lower die 6 is connected to the lower template 4.

[0042] The hollow cavity inside the first lower die 5 has the same cavity diameter as the hollow cavity inside the second lower die 6. The cavity diameter is larger than the diameter of the second cylindrical segment 22 and smaller than the diameter of the first cylindrical segment 21.

[0043] In this embodiment, the outdoor furnace flue top edge curling forming mold involves placing the flue with its top opening into the cavity of the lower mold while aligning the second cylindrical section 22 of the upper mold with the cavity of the lower mold. The upper mold is then pressed down, and the second cylindrical section 22 enters the flue through its opening. When the flue opening contacts the curling mechanism 3 of the upper mold, the edge of the flue opening enters the curling mechanism 3 via the vertical guide section 31. During the continuous downward pressing of the upper mold, the edge of the flue opening enters the arc-shaped curling section 32 via the edge of the opening through the vertical guide section 31. Under pressure, the edge of the opening bends under the guidance of the arc-shaped curling section 32 to form an arc-shaped curl. Since the curling mechanism 3 is annularly arranged, it can directly perform curling processing on the flue opening. When the upper die is pressed down to roll the edge, the edge of the opening is in contact with the second cylindrical section 22 of the upper die, while the outer wall of the flow tube is in contact with the inner wall of the cavity of the lower die. In this way, the second cylindrical section 22 can provide support for the cylinder wall of the flow tube during the rolling process, preventing the cylinder wall and opening of the flow tube from deforming due to the pressure of the upper die, and ensuring that the top of the flow tube can be rolled in one go after it is fully open.

[0044] In this embodiment, the flow tube processed by the outdoor furnace flow tube top edge rolling forming die is a cylindrical flow tube. A feed inlet is provided on the top wall of the tube, and the top of the feed inlet is fully open, meaning the top of the feed inlet extends to the edge of the flow tube opening. Typically, the diameter of the second cylindrical section 22 of the upper die is slightly smaller than the diameter of the flow tube opening, to facilitate the entry of the second cylindrical section 22 into the flow tube. Simultaneously, the outer diameter of the flow tube is slightly smaller than the diameter of the inner cavity of the lower die, allowing the flow tube to be placed inside the cavity for stamping and edge rolling.

[0045] Among them, reference Figure 3As shown, in order to facilitate the second cylindrical section 22 to better extend into the flow tube during the edge rolling process, and at the same time reduce the risk of the second cylindrical section 22 getting stuck with the flow tube opening, this embodiment sets the lower end of the second cylinder (i.e. the end away from the first cylindrical section 21) as a conical frustum, so that the second cylindrical section 22 can more easily enter the flow tube opening during the stamping edge rolling process.

[0046] Figure 3 In the first cylindrical segment 21, a mounting hole 8 is provided at the top end (i.e., the first end of the first cylindrical segment). (Refer to...) Figure 4 and Figure 5 As shown, the upper template 1 is also provided with a mounting hole 8 that passes through the upper template 1. A corresponding threaded pin (or bolt) can pass through the mounting hole 8 of the upper template 1 and enter the mounting hole 8 of the first cylindrical section 21. After tightening the threaded pin, the upper template 1 and the upper mold base 2 are fixedly connected.

[0047] In addition, the upper template 1 and the first cylindrical section 21 can also be fixedly connected by welding. Although this method can increase the stability between the upper template 1 and the first cylindrical section 21, the two are more difficult to disassemble. The specific connection method needs to be selected according to the actual processing scenario requirements. This embodiment will not elaborate further here.

[0048] Figure 4 and Figure 5 In the middle, a corresponding stepped fixing hole 9 is provided at the center of the upper template 1. The purpose is to facilitate fixing the upper template 1 on the stamping machine. A fixing shaft that matches the size of the stepped fixing block can be passed through the fixing hole to fix the upper template 1 to the bottom of the stamping part of the machine. Stamping and demolding can be achieved by controlling the up and down movement of the stamping part.

[0049] In this embodiment, the first end face of the second lower die 6 is provided with N cylindrical grooves 11 along the circumferential direction, and the second end of the first lower die 5 is provided with N cylindrical grooves 11 of the same size along the circumferential direction, which are coaxially corresponding to the cylindrical grooves 11 of the second lower die 6. In this embodiment, the second lower die 6 and the first lower die 5 are each provided with 4 cylindrical grooves.

[0050] Each cylindrical groove 11 is provided with an elastic element 7. The two ends of the elastic element 7 abut against the bottom surface of the cylindrical groove 11 of the second lower die 6 and the bottom surface of the cylindrical groove 11 of the first lower die 5, respectively. The elastic force of the elastic element 7 supports the first lower die 5, so that there is a certain height gap between the first lower die 5 and the second lower die 6.

[0051] In this embodiment, the elastic element 7 includes a cylindrical pin 71 and a cylindrical spring 72, with one end of the cylindrical pin 71 connected to one end of the cylindrical spring 72. In actual use, the cylindrical spring 72 can be placed in the cylindrical groove 11 of the second lower die 6, and the cylindrical pin 71 can be placed on top of the cylindrical spring 72. In actual use, one end of the cylindrical pin 71 is in the cylindrical groove 11 of the second lower die 6, and the other end is located in the cylindrical groove 11 of the first lower die 5. The cylindrical pin 71 is supported by the cylindrical spring 72 and springs up, thereby supporting the first lower die 5.

[0052] Specifically, during the edge-rolling of the flow tube, when the first cylindrical section 21 of the upper die (specifically the first stepped surface 10) contacts the first lower die 5, under pressure, the first lower die 5 moves axially downwards. After the elastic element 7 is fully pressed into the cylindrical groove 11, the lower end of the first lower die 5 contacts the upper end of the second lower die 6, and the first lower die 5 stops moving axially. After the edge-rolling is completed, the arc-shaped edge diameter of the flow tube is larger than the cavity diameter inside the first lower die 5. At this time, the elastic element 7 resets and pushes the first lower die 5 upwards, demolding the flow tube from the second lower die 6, making it easier to grasp the edge-rolled flow tube. At the same time, the compression of the elastic element 7 provides a buffering force, avoiding rigid impacts that could cause stamping damage to the flow tube.

[0053] In this embodiment, the upper mold is set as a stepped cylindrical segment, and a crimping mechanism 3 is set in a ring on the stepped surface. At the same time, the lower mold is set as a hollow cylinder that can hold the flow tube. After the flow tube with a fully open top is placed into the cavity of the lower mold, the upper mold with the crimping mechanism 3 is pressed down. The second cylinder of the upper mold enters the flow tube. When the upper mold is pressed down, it provides support for the side of the flow tube. At the same time, the edge of the flow tube with the opening contacts the crimping mechanism 3. During the continuous pressing of the upper mold, the edge of the flow tube opening forms an arc-shaped crimp along the crimping mechanism 3. The arc-shaped crimp of the flow tube is achieved with the top fully open. There is no need to open the flow tube after crimping it, which saves the processing steps of the flow tube and improves the crimping processing efficiency of the flow tube.

[0054] Example 2:

[0055] Based on Example 1, referring to Figure 6 As shown, in this embodiment, the first lower die 5 and the second lower die 6 are detachable. The first lower die 5 and the second lower die 6 are hollow cylinders with the same outer diameter. The shell of the second lower die 6 is provided with an elastic element 7, which supports the first lower die 5 through the elastic force of the elastic element 7, thereby forming a coaxial connection structure that can be axially elastically displaced.

[0056] Reference Figure 8 As shown, the hollow cavity inside the second lower die 6 includes a coaxial first cylindrical cavity 15 and a second cylindrical cavity 16. The first cylindrical cavity 15 is located near the first end of the second lower die 6 (i.e., Figure 8 The diameter of the first cylindrical cavity 15 is greater than the diameter of the second cylindrical cavity 16, and a second stepped surface 17 with a sudden change in diameter is formed at the connection between the first cylindrical cavity 15 and the second cylindrical cavity 16.

[0057] Figure 8 In the middle, the cylindrical groove 11 on the second lower die 6 is set downward along the second stepped surface 17. At the same time, the cylindrical groove 11 extends upward along the cavity wall of the first cylindrical cavity 15 to the upper port of the second lower die 6. Since the cavity wall thickness of the first cylindrical cavity 15 is less than that of the second cylindrical cavity 16, the cylindrical groove 11 extending into the first cylindrical cavity 15 is actually a semi-cylindrical groove.

[0058] Reference Figure 7 As shown, the outer shell of the first lower die 5 is divided into a first outer shell 12 and a second outer shell 13 along the axial direction. A third stepped surface 14 with a sudden diameter change is formed at the connection between the first outer shell 12 and the second outer shell 13. The outer diameter of the first outer shell 12 is the same as the diameter of the first cylindrical cavity 15, allowing the first outer shell 12 of the first lower die 5 to move up and down within the first cylindrical cavity 15 of the second lower die 6. Since the outer diameter of the first outer shell 12 is smaller than the outer diameter of the second outer shell 13, the cylindrical groove 11 on the first outer shell 12 is actually a semi-cylindrical groove.

[0059] Based on Embodiment 1, this embodiment sets the outer shell of the first lower die 5 as a stepped outer shell and the cavity of the second lower die 6 as a stepped cavity, so that the lower end of the first lower die 5 can be fitted into the cavity of the upper end of the second lower die 6 to form a constraint, thereby avoiding the first upper die and the second lower die 6 from skewing during edge rolling and improving the stability of the mold during edge rolling.

[0060] Example 3:

[0061] Based on Example 1, referring to Figure 9 and Figure 10 As shown, in order to facilitate the disassembly of the second lower die 6 and the lower template 4, and to prevent the second lower die 6 and the lower template 4 from shaking, a limiting groove 18 is provided on the lower template 4 in this embodiment. The width of the limiting groove 18 is the same as the outer diameter of the second end of the second lower die 6. The second end of the second lower die 6 abuts against the bottom surface of the limiting groove 18. The limiting groove 18 limits the movement of the lower end of the second lower die 6 on the lower template 4, so that the lower end of the second lower die 6 can only move along the opening direction of the limiting groove 18.

[0062] Reference Figure 8As shown, the limiting groove 18 in this embodiment is actually a "U" shaped groove. One end of the groove opens to the edge of the lower template 4, and the other end is semi-circular. The semi-circular part of the limiting groove 18 is adapted to the outer shell of the second lower die 6 to prevent the second lower die 6 from shaking in the limiting groove 18 (except for the opening direction of the limiting groove 18).

[0063] In this embodiment, in order to further improve the stability between the first lower die 5 and the second lower die 6, refer to Figure 11 As shown, in this embodiment, a limiting post 19 is provided on the lower template 4. One end of the limiting post 19 is connected to the lower template 4, and the other end of the limiting post 19 is provided with a limiting block 20. The first end of the first lower die 5 is adjacent to the limiting block 20, and the distance between the first end of the first lower die 5 and the limiting block 20 is 10~20mm. By setting the limiting block at the top of the first end of the first lower die 5, it is possible to prevent the stamped flow tube structure from taking the first lower die 5 away during demolding, thus avoiding the problem of mold misalignment.

[0064] In addition, the first end of the first lower die 5 can be set to abut against the limiting block 20. Through the above-mentioned limiting post structure, the upper end of the first lower die 5 (i.e. the first end of the first lower die) will abut against the limiting block 20 of the limiting post 19 due to the elastic force of the elastic element 7, thereby limiting the height of the first lower die 5 to bounce up, so that the first lower die 5 and the second lower die 6 maintain a relatively stable state.

[0065] The limiting post 19 can be fixedly installed on the surface of the lower template 4 next to the limiting groove. When installing it, ensure that the limiting block 20 at the top of the limiting post 19 does not affect the downward movement of the upper mold. Therefore, the specific installation position of the limiting post can be selected and set according to actual processing requirements, which will not be elaborated further in this embodiment.

[0066] In this embodiment, to address the problem of instability caused by the movement of the second lower die 6 along the opening direction within the limiting groove 18, a first connecting plate is provided on the side of the limiting post 19, and a second connecting plate is provided on the outer shell of the second lower die 6. Both the first and second connecting plates have through holes. By bolts passing through the through holes in the first and second connecting plates and locking them with nuts, the limiting post 19 and the second lower die 6 are fixedly connected, thereby preventing the second lower die 6 from shaking along the direction of the limiting groove 18.

[0067] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A molding die for forming the top edge of an outdoor furnace flow tube, comprising an upper die and a lower die, characterized in that: The upper mold includes an upper template, an upper mold base, and a rolled edge structure; The upper mold base is composed of a first cylindrical segment and a second cylindrical segment. The first cylindrical segment and the second cylindrical segment are coaxially integrally formed, and the diameter of the first cylindrical segment is larger than the diameter of the second cylindrical segment. The connection between the second end of the first cylindrical segment and the second cylindrical segment forms a first stepped surface with a sudden change in diameter. The first end of the first cylindrical segment is connected to the upper mold plate. The rolled edge structure is arranged in a ring along the outer circular surface of the second cylindrical segment on the first stepped surface, and the rolled edge structure includes a vertical guide segment and an arc-shaped rolled edge segment; The lower mold includes a lower template, a first lower die, and a second lower die. The first and second lower die are hollow cylinders with the same outer diameter. The second end of the first lower die is connected to the first end of the second lower die through an elastic element, forming a coaxial connection structure that can be elastically displaced axially. The second end of the second lower die is connected to the lower template. The hollow cavity inside the first lower die has the same diameter as the hollow cavity inside the second lower die. The cavity diameter is larger than the diameter of the second cylindrical segment and smaller than the diameter of the first cylindrical segment.

2. The outdoor furnace draft hood top edge crimp forming die according to claim 1, wherein: The first end face of the second lower die has N cylindrical grooves along the circumferential direction, and the second end of the first lower die has N cylindrical grooves of the same size along the circumferential direction, which are coaxially corresponding to the cylindrical grooves of the second lower die; an elastic element is provided in the cylindrical groove, and the two ends of the elastic element abut against the bottom surface of the cylindrical groove of the second lower die and the bottom surface of the cylindrical groove of the first lower die, respectively.

3. The outdoor furnace draft hood top edge crimp forming die according to claim 2, wherein: The elastic element includes a cylindrical pin and a cylindrical spring, with one end of the cylindrical pin connected to one end of the cylindrical spring.

4. The outdoor furnace draft hood top edge crimp forming die according to claim 1, wherein: The lower template is provided with a limiting groove, the width of which is the same as the outer diameter of the second end of the second lower die; the second end of the second lower die abuts against the bottom surface of the limiting groove.

5. The outdoor furnace draft hood top edge crimp forming die according to claim 1, wherein: The lower template is provided with a limiting post, one end of which is connected to the lower template, and the other end of which is provided with a limiting block. The first end of the first lower die is adjacent to the limiting block, and the distance between the first end of the first lower die and the limiting block is 10~20mm.

6. The outdoor furnace draft hood top edge crimp forming die according to claim 5, wherein: The limiting post is provided with a first connecting plate on its side, and the second lower die is provided with a second connecting plate on its outer shell. Both the first connecting plate and the second connecting plate are provided with through holes. The limiting post and the second lower die are fixedly connected by bolts passing through the through holes and being locked with nuts.

Images