CN1044351C - A metallic can seaming process - Google Patents

Abstract

The present invention relates to a method for sealing cans. The top and the bottom of a can be sealed or fixed to a can body through microminiature seals by using the method. In the method, a material with the thickness of 0.16mm or even thinner thickness and with the hardness of DR8 or DR9 is used to make the top and the bottom of a can. Therefore, if the microminiature sealing method is adopted, the size of the hook part of a can cover, the size of the hook part of a can body and the length of a seal can be greatly reduced, but the original capacity of a can not be changed.

Description

Be used to make the sealing device of metal can

The present invention relates to a kind of sealing device that is used to make the metal can.

Those skilled in the art that know that present employed can all is in order to all products of splendid attire, particularly in order to food enclosed in sealed.And the top of usually said health can and bottom are to be 0.22～0.24 millimeter and to finish its making with the tin-plate of standard tempering process with thickness.When using 0.22～0.24 millimeter tin-plate, also can make microminiature and seal, but this has just lost sheet metal brought appreciable 21.2～21.3% the saving that used thickness is 0.16 millimeter and DR8 tempering process.And this just is the characteristics of the inventive method.

Having disclosed a kind of in the flat 4-231126 of Japanese Patent JP that submitted on July 12nd, 1991 the applicant is the metal can that 0.16 millimeter, the sheet material of DR8 tempering are made with thickness, but does not relate to relevant production facilities and method in this patent.

Therefore, the objective of the invention is to, a kind of sealing device that is specifically designed to above-mentioned with the metal can made than light sheet is provided.

For achieving the above object, the invention provides a kind of sealing device that is used to make can, comprise that a substrate, seals chuck, at least one first hemming device and second hemming device, it is characterized in that, described first hemming device is an arc roughly, its main radius is 0.946 millimeter, the inner radial of one blunt circle is 0.254 millimeter, the outer radius of one blunt circle is 0.159 millimeter, its width is 0.654 millimeter, it highly is 1.156 millimeters, and plane leaning angle with respect to the horizontal plane is 2 ° on it, and its lower plane leaning angle with respect to the horizontal plane is 1 °; Described second hemming device also is an arc roughly, and its first radius is 0.825 millimeter, and its second radius is 0.550 millimeter, and its width is 0.575 millimeter, and the outer radius of a blunt circle is 0.150 millimeter, and on it plane leaning angle with respect to the horizontal plane is 5 °.

Adopt equipment of the present invention, owing to can reduce to seal the size of hook portion and other fixing superimposed part greatly, therefore, the diameter that is used to make the material of the top of can and bottom can greatly reduce, can reduce the height of can body in addition, and this height reduce can't change the original capacity of can.This is a kind of method that can save sheet metal, described saving, and the saving of the amount of being on the one hand is to use thin harder sheet metal instead on the one hand, that is to say that can use thickness instead is 0.16 millimeter and use DR8 hot-cured material.Its price is than prior art and use the metallic material of standard tempering process will reduce by 21.2～28.3%.

The sealing device of metal can of the present invention can provide the saving of appreciable manufacturing cost.This is owing to reduced the diameter of the material therefor of can top and bottom greatly on the one hand, on the other hand owing to reduced the height of can body and don't reduced the cause of the capacity of can.

Why the diameter of the material that can top and bottom are used can reduce is that hook portion is fixed with other, the size of superimposed part owing to having reduced.In addition,, compare, make the saving of the inventive method seem even more important with the material of 0.22～0.24 millimeter of can top and bottom use in the prior art and the standard of use tempering process owing to use 0.16 millimeter and use DR8 hot-cured material instead.

Equipment of the present invention is applicable to the metal can of have the electric welding can body (3 chip jar) or deep-draw can body (2 chip jar), that is to say, is applicable to that it is not the metal can that forms with tin, lead or thermoplastic material's soldering that can body does not have superimposed part or can body.If the can body junction forms with the fine weldering of tin, lead or thermoplastic plastic, equipment then of the present invention can not be suitable for.

The equipment of the invention described above metal can system jar or metallic can seaming, its details had both shown the used disk material in top and bottom as shown in drawings among the figure, also show fixed part and can body, for the purpose of comparing, and all indicated their size.

Fig. 1 is a section drawing, there is shown sealing of obtaining with prior art, its usefulness be the sheet metal of 0.22 millimeters thick, the size of sealing is bigger.

Fig. 2 is a section drawing, there is shown with the formed microminiature of the inventive method to seal, and be 0.16 millimeter and harder sheet metal promptly with thickness, adopt the DR8 tempering.Compare with the method for prior art, it is much smaller to seal size.

Fig. 3 is a lateral plan of sealing the can of mouth with prior art, and the aspect ratio of can body is much bigger with the formed size of sealing of the inventive method.

Fig. 4 is a can of sealing mouth with sealing method of the present invention, and the can body height of can is more much lower than prior art, but does not change the original capacity of can.

Fig. 5 is the top view as the metal disk material of can top and bottom, and it is a needed size when sealing with prior art.

Fig. 6 is that its diameter is less, because it seals with the small shape sealing method of the present invention as the top view of the metal disk material of can top and bottom.

Fig. 7 be through the can top of impression and bottom top view, it is the size when sealing with prior art.

Fig. 8 is through the can top of impression and the top view of bottom, and it is the size when sealing with the inventive method.

Fig. 9 is the can top that impressed and the cutaway view of bottom, there is shown the profile when adopting the prior art sealing method to seal and the size of volume part.

Figure 10 is the can top that impressed and the cutaway view of bottom, has shown reducing of the profile that adopts after the method for the present invention and crimping portion size among the figure.

Figure 11 is the lateral plan of cylindrical shape can body, and it is a height required when sealing with prior art.

Figure 12 is the lateral plan of cylindrical shape can body, and it is a needed size when sealing with sealing method of the present invention.

Figure 13 is the lateral plan of can body of band bead, and the size among the figure is the size when sealing with prior art.

Figure 14 is the lateral plan of can body of band bead, and the can body size among the figure reduces greatly, and it is the size when sealing with sealing method of the present invention.

Figure 15 is used for jar scheme drawing that seals chuck and hemming device of mouth.

Figure 16 is first profile and the size of sealing hemming device that is used for that microminiature seals.

Figure 17 is second profile and the size of sealing hemming device that is used for that microminiature seals.

Figure 18 is the lateral plan that seals preceding cover or pot bottom and can body.

Figure 19 first seals the lateral plan that the microminiature after flange crimping operation finishes is sealed.

Figure 20 second seals the lateral plan that the microminiature after flange crimping operation is finished is sealed.

Figure 21 is prior art used first profile and size of sealing hemming device when sealing.

Figure 22 is used second profile and the size of sealing hemming device when sealing with prior art.

Figure 23 is a prior art at first the lateral plan of the situation of sealing after sealing flange crimping operation.

Figure 24 is a prior art at second the lateral plan of the situation of sealing after sealing flange crimping operation.

The technology of utilizing new can sealing device of the present invention to make can is described in detail as follows.Usually the capper of usefulness as shown in figure 15, its chief component comprises the sealed station of at least one or a plurality of cappers, each sealed station comprises a substrate 8, one seals chuck 1, at least one first operation hemming device 4, one second operation hemming device 5, the substrate of described machine and tank body chuck are supporting can body 6.The first cover 7 of close-fitting sealing clip (or jar bottom) correctly is placed on the appropriate location of can body and as the supporting mass that seals crimping pressure.

The used machine of the used complete and above-mentioned prior art of capper of microminiature sealing method of the present invention is the same, and different is, first hemming device and second hemming device (Figure 16 and 17) are designed again, has revised their size.

The design of first and second hemming devices and size are along with the thickness of metallic material and hardness and can diameter is different and different.No matter being can that seals with microminiature or the can that seals with prior art, all is to depend on the thickness of material and hardness when design and decision size.So it is that 73 mm dia cans and the small-sized method of sealing are to the occasion of can two ends (referring to top and bottom) when sealing that the design of first and second hemming device shown in Figure 16 and 17 and size only are applicable to the manufacture of materials can body with 0.16 millimeters thick and DR8 tempering.As a comparison, Figure 21 and 22 show with 0.22 millimeters thick, hardness be T61 manufacture of materials, can body is 73 mm dias and with the design and the size of first and second hemming devices of the tradition method of the sealing when two ends of can are sealed.

Above example is the example that microminiature is sealed.Should be appreciated that microminiature is sealed and can also be used other size, so scope of the present invention is not limited to this example.

Therefore, be greater than or less than 73 millimeters can for cover and jar end, Figure 16, the size of 17,21 and 22 (unit millimeters) should be made amendment with reference to above-mentioned illustrated embodiment.This is to all being suitable for traditional sealing method with microminiature sealing method of the present invention.

Form each stage such as Figure 18 that microminiature is sealed, shown in 19,20 and 2.In first time during flange crimping operation (referring to Figure 18 and 19), the microminiature bead 3 that the microminiature of cover is curled with can body is intermeshing by first hemming device 4, and this microminiature first hemming device 4 has one to press to the contoured groove that seals chuck 1.After the first time, sealing operation finished, first seal hemming device backward indentation no longer contact cover (or jar end).Second to seal the profile of groove of hemming device 5 (Figure 20) different with the profile of first hemming device, thereby and it be to be used for that preformed hook portion is pressed on together and eliminates the wrinkle that covers hook portion to make microminiature seal the acquisition leak tightness.The length and other the superimposed parts (Fig. 2) that adopt system jar method of the present invention and cover hook portion (or jar bottom dog portion), can body hook portion, microminiature are sealed adopt specific size can obtain well and uniformly to seal.

Figure 21 and 22 is depicted as the camber line and the size of first and second used hemming device of prior art sealing device.Utilize the prior art sealing device to form the step of sealing usually and be shown in Figure 23 and 24, in prior art first flange crimping operation (seeing Figure 23), cover 10 meshes with the bead 11 of can body, and the groove that first hemming device 12 has a contoured seals chuck 1 in order to press to.After first sealing operation finished, first hemming device 12 indentation backward no longer contacted cover (or jar end).The profile of the groove of second hemming device 13 (Figure 24) is different with the profile of the groove of first hemming device.This groove is more shallow than the first crimping groove, and it is used for preformed hook portion is compressed, and adopts the cover hook portion of specific dimensions, the can body hook portion, seals length and the leak tightness of other superimposed parts (referring to Fig. 1) to obtain to seal.

The advantage that microminiature is sealed is the system of can saving greatly jar used material, for no other reason than that with thin sheet material, promptly having used thickness is that 0.16 millimeter, the sheet material of DR8 tempering have replaced the used sheet material of existing sealing tech, existing sealing tech is the sheet material of 0.22-0.24 millimeter usually with thickness, this sheet material is softer, but uses the capacity that 0.16mm sheet material does not influence can instead.

Utilize sealing device of the present invention why can save more material, also be to reduce greatly to form the diameter of can top and bottom image, as Fig. 5 and shown in Figure 6, simultaneously also because of having reduced hook portion and other sizes of sealing such as Fig. 1, Fig. 2, Fig. 9 and shown in Figure 10.In addition, the saving of more material also has been to reduce the height of can cylindrical body such as Fig. 3, Fig. 4 and Figure 11-shown in Figure 14.When using sealing device of the present invention, the capacity that reduces not influence can of this material.

In order properly to estimate the real advantage of sealing device of the present invention, what be worth proposition is, except having saved (the impossible lower material of this price that uses of prior art) the thickness material greatly in the cover and jar end that form can owing to the material that has used thin 0.16mm thickness and DR8 tempering, high hardness and thin material will make the superimposed part of hook portion form big distortion, this distortion will have influence on total distortion of sealing, this distortion will be except bringing the disappointing outward appearance for can, also can cause to provide the failure-free sealing, just can not provide desirable hermetic seal, and this to be this class container well seal and the most basic requirement of quality.

Claims (5)

1. sealing device that is used to make can, comprise that a substrate, seals chuck, at least one first hemming device and second hemming device, it is characterized in that, described first hemming device is an arc roughly, its main radius is 0.946 millimeter, the inner radial of one blunt circle is 0.254 millimeter, the outer radius of one blunt circle is 0.159 millimeter, its width is 0.654 millimeter, it highly is 1.156 millimeters, plane leaning angle with respect to the horizontal plane is 2 ° on it, and its flat down leaning angle with respect to the horizontal plane is 1 °; Described second hemming device also is an arc roughly, and its first radius is 0.825 millimeter, and its second radius is 0.550 millimeter, and its width is 0.575 millimeter, and the outer radius of a blunt circle is 0.150 millimeter, and on it plane leaning angle with respect to the horizontal plane is 5 °.

2. a metal can that comes out with device fabrication as claimed in claim 1 is characterized in that, the sheet metal thickness that described can adopts is 0.16 millimeter or lower.

3. a metal can that comes out with device fabrication as claimed in claim 1 is characterized in that, the sheet metal thickness that described can adopts is greater than 0.16 millimeter.

4. a metal can that comes out with device fabrication as claimed in claim 1 is characterized in that, the height of cover hook portion and tank body hook portion is 1.0 millimeters.

5. a metal can that comes out with device fabrication as claimed in claim 1 is characterized in that, the height that seals is 1.5 millimeters.

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