Hemming die structure for stainless steel ware

Abstract

The utility model discloses a stainless steel vessel hemming die structure which comprises an upper die head assembly and a lower die head assembly, the upper die head assembly is provided with a forming die head, the lower die head assembly is provided with a half block, and the forming die head and the half block are matched to form a hemming area. According to the utility model, through accurate die control, the consistency of the hemming quality of each produced stainless steel vessel is ensured, and the requirement of large-scale production is met.

Description

Technical Field

[0001] The utility model relates to the technical field of container processing, in particular to a curling die structure for stainless steel utensils. Background Art

[0002] In the manufacturing process of stainless steel utensils, the curling process is a crucial step, which directly affects the use experience of the mouth part and also has an impact on the sealing performance, durability and aesthetics of the product. Traditional curling dies for stainless steel utensils are difficult to achieve high-precision control, thus it is difficult to ensure the consistency and quality stability of products, and problems such as inconsistent product dimensions are likely to occur.

[0003] The limitations of traditional dies are large. Especially, it is impossible to make precise control over the outer diameter of the mouth part and the size of the inward curling of the mouth part of stainless steel utensils, and it is difficult to meet the product quality requirements. Therefore, improvements need to be made to the above problems. Summary of the Invention

[0004] Aiming at the defects such as inaccurate curling existing in the prior art, the utility model provides a new curling die structure for stainless steel utensils.

[0005] In order to solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] A curling die structure for stainless steel utensils includes an upper die head assembly and a lower die head assembly. The upper die head assembly is provided with a forming die head, and the lower die head assembly is provided with a half block. The forming die head and the half block cooperate to form a curling area.

[0007] The upper die head assembly and the lower die head assembly cooperate through the forming die head and the half block to curl the stainless steel utensils. The mouth part of the stainless steel utensil to be curled is placed in the curling area. Through the precise cooperation of the forming die head and the half block, the dimensional consistency of the curling can be ensured, meeting the requirements of high-precision manufacturing. The cooperation of the forming die head and the half block can form a smooth and uniform curl, improving the quality of the product. The design of the die structure optimizes the curling process, reduces the adjustment time in production, and improves the overall production efficiency. By improving the curling quality, the rejection rate is reduced, and at the same time, the simplified operation process also helps to reduce the labor cost.

[0008] The utility model ensures the consistency of the curling quality of each produced stainless steel utensil through precise die control, meeting the requirements of mass production.

[0009] Preferably, in the above-mentioned curling die structure for stainless steel utensils, the forming die head includes an inner die head part and an outer die head part. The inner die head part and the outer die head part are in transitional fit and form a die head groove.

[0010] The inner die head and the outer die head are used to cooperate to form a die head groove. The die head groove is used to cooperate with the half block to achieve hemming. The transitional fit design of the inner die head and the outer die head ensures that the material can be evenly guided and formed during the hemming process, thereby improving the accuracy and consistency of hemming. The cooperation between the inner die head and the outer die head helps to evenly distribute stress during the hemming process, reducing local over-stretching or compression of the material, thereby improving the durability and reliability of the finished product. The design of the die head groove makes the forming process smoother, reduces the friction and resistance of the material in the mold, helps to achieve smooth and uniform hemming, and also improves the production speed and efficiency.

[0011] Preferably, for the above-mentioned hemming die structure of a stainless steel utensil, the cross-section of the inner die head is a symmetrically downwardly convex trapezoid-like structure, and the cross-section of the outer die head is a symmetrically outwardly and downwardly bent L-like structure.

[0012] The trapezoid-like structure of the inner die head and the L-like structure of the outer die head work together to ensure the precise geometric shape of the hemming, help to evenly guide the material to deform, and reduce the uneven stretching of the material during the hemming process, thus meeting the design requirements. The trapezoid-like and L-like structural designs help to form a stronger structure in the hemming area, improving the load-bearing capacity and durability of the hemming.

[0013] Preferably, for the above-mentioned hemming die structure of a stainless steel utensil, the upper die head assembly is further provided with a forming die head fixing block and an upper bottom plate. The forming die head fixing block is fixed within the upper bottom plate, and the forming die head is fixed within the forming die head fixing block.

[0014] The forming die head fixing block and the upper bottom plate both play a fixing role. By fixing the forming die head within the forming die head fixing block and then fixing the forming die head fixing block within the upper bottom plate, the stability of the die assembly is ensured, reducing vibration and displacement during the forming process. Fixing the forming die head within the forming die head fixing block can disperse the pressure during the forming process, reducing direct wear on the die head, thereby improving the durability and service life of the die. The modular fixing method allows for quick replacement of forming die heads of different specifications to adapt to the production requirements of different products, improving the production flexibility. The stable fixing structure helps to ensure the consistency of the material during each forming process, thereby improving the quality of the final product. The stable die structure reduces the safety risks caused by die loosening or displacement during the production process.

[0015] Preferably, for the above-mentioned hemming die structure of a stainless steel utensil, the half block is provided with a half convex portion, and the half convex portion cooperates with the forming die head.

[0016] The Haff protrusions are used to cooperate with the die head grooves, ensuring the precise positioning of the material during the hemming process, thus improving the consistency and accuracy of hemming. The design of the Haff protrusions helps to provide additional support and guidance during the hemming process, enhancing the quality and durability of the hemming.

[0017] Preferably, for the above-mentioned hemming die structure of a stainless steel utensil, the lower die head assembly is further provided with a lower die head, the lower die head cooperates with the Haff block to form a utensil area, the forming die head is provided with a positioning guide shaft, and the positioning guide shaft cooperates with the lower die head.

[0018] The lower die head is used to cooperate with the Haff block and the positioning guide shaft, playing a role in positioning and guiding. The stainless steel utensil to be hemmed is placed in the utensil area. The design of the positioning guide shaft provides precise guidance, ensuring the correct alignment between the forming die head and the lower die head, thereby improving the forming accuracy. The cooperation between the positioning guide shaft and the lower die head helps to ensure the consistency of each product in shape and size, enhancing the overall quality of the product. Precise die fitting reduces the safety risks caused by die misalignment or displacement during the production process.

[0019] Preferably, for the above-mentioned hemming die structure of a stainless steel utensil, the lower die head assembly is further provided with a Haff fixing plate and a Haff dragging plate, the Haff fixing plate is connected to the Haff dragging plate, and the Haff block is fixed on the Haff fixing plate.

[0020] The connection between the Haff fixing plate and the Haff dragging plate provides a stable support structure, ensuring the stability of the Haff block during the hemming process and reducing the deformation of the die. The design of fixing the Haff block on the Haff fixing plate helps to ensure the precise positioning of the Haff block in the die, achieving precise hemming dimensions and shapes. The connection design between the Haff fixing plate and the Haff dragging plate helps to disperse the pressure during the forming process, reducing the wear of the die, thereby improving the durability and service life of the die. A stable die structure reduces the safety risks caused by die misalignment or displacement during the production process.

[0021] Preferably, for the above-mentioned hemming die structure of a stainless steel utensil, the lower die head assembly is further provided with a workpiece positioning barrel and a workpiece fixing plate, the workpiece positioning barrel is fixed on the workpiece fixing plate, the Haff dragging plate is fixed on the workpiece positioning barrel, a fixing rod is arranged on the lower side of the lower die head, the lower die head is fixed on the fixing rod, and the fixing rod is fixed on the workpiece fixing plate.

[0022] The design of the workpiece positioning barrel ensures the precise positioning of the workpiece during the curling process, thereby improving the accuracy and consistency of forming. By fixing the half-movable platen to the workpiece positioning barrel and fixing the lower die head to the fixed rod, a stable structure is formed, reducing vibration and displacement during the high-pressure forming process. This modular component design makes the assembly and adjustment of the mold more convenient and improves the efficiency of production preparation. The stable mold structure helps to ensure the consistency of each product in shape and size, enhancing the overall quality of the product. By fixing the lower die head and the half-movable platen to a stable structure, it helps to disperse the pressure during the forming process, reduce the wear on the mold, thereby improving the durability and service life of the mold. The stable mold structure reduces the safety risks caused by mold misalignment or displacement during the production process.

[0023] Preferably, in the above-mentioned curling die structure for stainless steel utensils, the lower die head assembly is further provided with a stock drag plate positioning sleeve, a stock drag plate is arranged inside the stock drag plate positioning sleeve, a thimble is arranged inside the workpiece fixing plate, a stock drag block is arranged on the outer side of the fixed rod, the upper side of the thimble cooperates with the stock drag block, and the lower side of the thimble cooperates with the stock drag plate.

[0024] The design of the stock drag plate positioning sleeve and the stock drag plate ensures the precise control of the material during the curling process, contributing to achieving uniform curling. The cooperation between the thimble and the stock drag plate provides stable material positioning, precisely controlling the movement of the material during the curling process and improving the consistency of forming. By precisely controlling the movement of the material, the time for adjustment and correction is reduced, the production process is accelerated, and the production efficiency is improved.

[0025] Preferably, in the above-mentioned curling die structure for stainless steel utensils, the lower die head assembly is further provided with a lower bottom plate, the lower bottom plate is connected to the stock drag plate positioning sleeve, the lower bottom plate is provided with a ejector rod hole, and the ejector rod hole cooperates with the stock drag plate.

[0026] The ejector rod hole is used to cooperate with the ejector rod of the stretching machine to play a supporting role. The connection between the lower bottom plate and the stock drag plate positioning sleeve ensures the stability of the entire lower die head assembly, ensuring firmness and durability during the operation of the mold. The design of the lower bottom plate helps to disperse the pressure during the use of the mold, reduce wear, and extend the service life of the mold. The stable lower bottom plate structure reduces the safety risks caused by mold misalignment or displacement during the production process. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of the present invention;

[0028] Figure 2 is a schematic structural diagram of the curling area in the present invention;

[0029] Figure 3 Structural schematic diagram of the forming die head and the forming die head fixing block in the present utility model;

[0030] Figure 4 Structural schematic diagram of the split block in the present utility model;

[0031] Figure 5 Structural schematic diagram of the upper bottom plate in the present utility model;

[0032] Figure 6 Structural schematic diagram of the split fixing plate in the present utility model;

[0033] Figure 7 Structural schematic diagram of the split slide plate in the present utility model;

[0034] Figure 8 Structural schematic diagram of the material dragging plate in the present utility model;

[0035] Figure 9 Structural schematic diagram of the workpiece positioning barrel in the present utility model;

[0036] Figure 10 Structural schematic diagram of the workpiece fixing plate in the present utility model;

[0037] Figure 11 Structural schematic diagram of the material dragging plate positioning sleeve in the present utility model;

[0038] Figure 12 Structural schematic diagram of the lower bottom plate in the present utility model;

[0039] Figure 13 Structural schematic diagram of the material dragging block in the present utility model;

[0040] Figure 14 Structural schematic diagram of the positioning guide shaft in the present utility model;

[0041] Figure 15 Structural schematic diagram of the lower die head in the present utility model;

[0042] Figure 16 Structural schematic diagram of the fixing rod in the present utility model. Specific embodiments

[0043] The following further describes the present utility model in detail in conjunction with the appended Figures 1-16 drawings and specific embodiments, but they are not limitations to the present utility model:

[0044] Example 1

[0045] A curling die structure for stainless steel utensils, comprising an upper die head assembly 1 and a lower die head assembly 2. The upper die head assembly 1 is provided with a forming die head 11, and the lower die head assembly 2 is provided with a half block 21. The forming die head 11 and the half block 21 cooperate to form a curling area 3.

[0046] Preferably, the forming die head 11 includes an inner die head part 12 and an outer die head part 13. The inner die head part 12 and the outer die head part 13 are in transitional fit and form a die head groove 14.

[0047] Preferably, the cross-section of the inner die head part 12 is a symmetrically downwardly convex trapezoid-like structure, and the cross-section of the outer die head part 13 is a symmetrically outwardly and downwardly bent L-shaped structure.

[0048] Preferably, the upper die head assembly 1 is further provided with a forming die head fixing block 15 and an upper bottom plate 16. The forming die head fixing block 15 is fixed within the upper bottom plate 16, and the forming die head 11 is fixed within the forming die head fixing block 15.

[0049] Preferably, the half block 21 is provided with a half block protruding part 211, and the half block protruding part 211 cooperates with the forming die head 11.

[0050] Preferably, the lower die head assembly 2 is further provided with a lower die head 22. The lower die head 22 and the half block 21 cooperate to form a utensil area 4. The forming die head 11 is provided with a positioning guide shaft 111, and the positioning guide shaft 111 cooperates with the lower die head 22.

[0051] Preferably, the lower die head assembly 2 is further provided with a half block fixing plate 212 and a half block drag plate 213. The half block fixing plate 212 is connected to the half block drag plate 213, and the half block 21 is fixed on the half block fixing plate 212.

[0052] Preferably, the lower die head assembly 2 is further provided with a workpiece positioning barrel 23 and a workpiece fixing plate 24. The workpiece positioning barrel 23 is fixed on the workpiece fixing plate 24, the half block drag plate 213 is fixed on the workpiece positioning barrel 23. A fixing rod 25 is provided on the lower side of the lower die head 22, the lower die head 22 is fixed on the fixing rod 25, and the fixing rod 25 is fixed on the workpiece fixing plate 24.

[0053] Preferably, the lower die head assembly 2 is further provided with a drag plate positioning sleeve 26. A drag plate 261 is arranged within the drag plate positioning sleeve 26. A thimble 241 is arranged within the workpiece fixing plate 24. A drag block 251 is arranged on the outer side of the fixing rod 25. The upper side of the thimble 241 cooperates with the drag block 251, and the lower side of the thimble 241 cooperates with the drag plate 261.

[0054] Preferably, the lower die head assembly 2 is further provided with a lower base plate 27, the lower base plate 27 is connected to the drag plate positioning sleeve 26, the lower base plate 27 is provided with ejector rod holes 271, and the ejector rod holes 271 cooperate with the drag plate 261.

[0055] As Figures 1-2 shown, the external stretching machine ejector rod 100 extends into the ejector rod hole 271, and there is a gap between the stretching machine ejector rod 100 and the drag plate 261, which is the preparatory state before work. When work is required, open the half block 21 and place a stainless steel utensil as the workpiece and material. Close the half block 21 and start the mold. The external stretching machine movable plate drives the upper die head assembly 1 to descend. The forming die head 11 contacts the mouth of the stainless steel utensil for curling. The inner die head 12 contacts first, and the outer die head 13 will be contacted during the curling process, so as to accurately control the outer diameter of the mouth. The dimension can be controlled within a tolerance of 0.1 mm. The external stretching machine movable plate drives the upper die head assembly 1 to continue descending, so that the curled edge contacts the half convex part 211. At this time, the positioning guide shaft 111 meshes with the lower die head 22 and maintains the limit, so as to accurately control the dimension of the curled edge of the mouth inward. The dimension can be controlled within a tolerance of 0.2 mm. Keep the pressure continued. After the curling is completed, the external stretching machine movable plate drives the upper die head assembly 1 to ascend. The external stretching machine ejector rod 100 ascends, and the stainless steel utensil is separated from the half convex part 211. Open the half block 21 and take out the stainless steel utensil to complete the work. The screws for fixing in the figure, except for the half block 21, are fixed with M10 screws.

[0056] As Figure 3 shown, both the inner die head 12 and the outer die head 13 are made of alloy copper, with moderate hardness and softness, effectively avoiding problems such as abrasion and scratching of the product mouth, and improving the product quality. The arc radius of the die head groove 14 is 2.75 mm. The draft angle of the inner die head 12 is 4°, that is, the left and right outer edges of the downward convex part respectively form an angle of 4° with the center line, so that the mouth of the stainless steel utensil is slightly opened when contacting the mold, which helps to curl along the inner die head 12. The clearance between the inner die head 12, the outer die head 13 and the positioning guide shaft 111 is within 0.1 mm to ensure the coaxiality of the mold.

[0057] As Figure 4 、 6As shown, the half couplings 21 and the half coupling fixing plates 212 are fixed with six M8 screws. The half couplings 21 and the half coupling fixing plates 212 are both wire cut into a split structure in half to facilitate the removal of irregular cylindrical stainless steel utensils. The draft angle of the half coupling protrusion 211 is 10°, that is, the included angles between the left and right outer edges of the upward protrusion and the center line are both 10°, so as to facilitate the demolding of the workpiece and also facilitate fine-tuning the mouth size to make the size more accurate. By adjusting the axial height of the workpiece, the size of the curling gap can be controlled. For the two arcs on the upper side of the half coupling protrusion 211, the radius of the inner arc is 0.5 mm and the radius of the outer arc is 1 mm.

[0058] As Figures 14-15 shown, the clearance between the positioning guide shaft 111 and the lower die head 22 is within 0.1 mm to ensure the coaxiality of the upper and lower dies.

[0059] In summary, the above are only the preferred embodiments of the present invention, and all equivalent changes and modifications made within the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims

1. A stainless steel vessel curling die structure, comprising an upper die assembly (1) and a lower die assembly (2), characterized in that: The upper die assembly (1) is provided with a forming die (11), and the lower die assembly (2) is provided with a half block (21), and the forming die (11) cooperates with the half block (21) to form a curling area (3).

2. A stainless steel vessel curling mold structure according to claim 1, characterized in that: The molding die head (11) comprises an inner die head (12) and an outer die head (13); the inner die head (12) and the outer die head (13) are transitionally matched to form a die head groove (14).

3. A stainless steel vessel curling mold structure according to claim 2, characterized in that: The cross section of the inner mold head (12) is a symmetrical, downwardly protruding trapezoidal structure, and the cross section of the outer mold head (13) is a symmetrical, outwardly and downwardly bent L-shaped structure.

4. The stainless steel vessel curling mold structure according to claim 1, characterized in that: The upper die head assembly (1) is further provided with a forming die head fixing block (15) and an upper base plate (16); the forming die head fixing block (15) is fixed in the upper base plate (16), and the forming die head (11) is fixed in the forming die head fixing block (15).

5. The stainless steel vessel curling mold structure according to claim 1, characterized in that: The Hough block (21) is provided with a Hough protrusion (211), and the Hough protrusion (211) cooperates with the molding die head (11).

6. The stainless steel vessel curling mold structure according to claim 1, characterized in that: The lower die assembly (2) is further provided with a lower die (22), and the lower die (22) cooperates with the half block (21) to form a vessel area (4), and the molding die (11) is provided with a positioning guide shaft (111), and the positioning guide shaft (111) cooperates with the lower die (22).

7. A stainless steel vessel curling mold structure according to claim 6, characterized in that: The lower die head assembly (2) is further provided with a Hough fixing plate (212) and a Hough drag plate (213); the Hough fixing plate (212) is connected to the Hough drag plate (213); and the Hough block (21) is fixed on the Hough fixing plate (212).

8. The stainless steel vessel curling mold structure according to claim 7, characterized in that: The lower die head assembly (2) is further provided with a workpiece positioning barrel (23) and a workpiece fixing plate (24); the workpiece positioning barrel (23) is fixed on the workpiece fixing plate (24); the half drag plate (213) is fixed on the workpiece positioning barrel (23); a fixing rod (25) is provided on the lower side of the lower die head (22); the lower die head (22) is fixed on the fixing rod (25); and the fixing rod (25) is fixed on the workpiece fixing plate (24).

9. A stainless steel vessel curling mold structure according to claim 8, characterized in that: The lower die head assembly (2) is further provided with a material drag plate positioning sleeve (26), a material drag plate (261) is arranged inside the material drag plate positioning sleeve (26), a ejector pin (241) is arranged inside the workpiece fixing plate (24), a material drag block (251) is arranged on the outer side of the fixing rod (25), the upper side of the ejector pin (241) cooperates with the material drag block (251), and the lower side of the ejector pin (241) cooperates with the material drag plate (261).

10. A stainless steel vessel curling mold structure according to claim 9, characterized in that: The lower die head assembly (2) is further provided with a lower bottom plate (27), the lower bottom plate (27) is connected to the material drag plate positioning sleeve (26), the lower bottom plate (27) is provided with a push rod hole (271), and the push rod hole (271) cooperates with the material drag plate (261).

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