WO2015096558A1

WO2015096558A1 - Five-layer seam edge structure for small-scale, three-plate, irregularly shaped tank and seaming method thereof

Info

Publication number: WO2015096558A1
Application number: PCT/CN2014/090665
Authority: WO
Inventors: 张筱
Original assignee: 东莞市汇美制罐有限公司
Priority date: 2013-12-26
Filing date: 2014-11-10
Publication date: 2015-07-02
Also published as: CN103818608A; CN103818608B

Abstract

Disclosed are a seam edge structure for a small-scale irregularly shaped tank and a manufacturing method thereof, in particular a pressed and inverted seaming method. The structure comprises a tank body seam edge (11) and a tank base seam edge (21) made from the same model of plate material, characterised in that the tank body seam edge (11) covers the tank base seam edge (21) to be rolled inwardly by 90 degrees, so as to form a five-layer structure of a tank body seam edge (111) layer - a tank base seam edge (212) layer - a tank base seam edge (213) layer - a tank body seam edge (114) layer - a tank base (215) layer arranged in sequence. Use of the above-mentioned five-layer seam edge structure for a small-scale, three-plate, irregularly shaped tank has a greatly improved sealing performance compared with the prior art and can effectively improve damp-proof performance, thereby protecting the safety of food products inside a case. By using the pressing seaming method, the seam edge will not produce an "iron tongue", there is no gap inside the seam edge, and the production method is simple and production efficiency is high.

Description

Small three-piece shaped can five-layer crimping structure and sealing method thereof

Technical field

The invention relates to a crimping structure of a small shaped can and a manufacturing method thereof, in particular to a stamping and buckle bottom sealing method.

Background technique

The bottom cover sealing method of the prior art cans is mostly formed by a roll encapsulation machine. The principle is: first put the bottom of the barrel on the barrel body, then clamp with two plates, and make the barrel body together with the top of the barrel bottom Rotate and then press the crimping forming wheel up. The top of the bottom of the bucket and the edge of the barrel are curled along the curve of the groove of the roller. When the roller is completely upright on the barrel, the curling is basically formed. Finally, the two correction rollers are pressed up to press the curl and eliminate the rebound. The curling becomes the desired shape. This method is mainly used for the sealing of round barrels. In the process of winding the sealed can, because the four sides are not round, the distance between each point of the sealing part and the center of the can body is not equal, and the rolling roller can not make a circular motion, so the roller of the round can rotates in a circular motion and the can body rotates. The sealing method is not suitable for the sealing of the shaped can. For example, the sealing of a relatively small shaped box such as a gum box adopts a shaped can winding machine, which must be a structure in which the can body is stationary and the rolled roller is shaped to move. There are two basic types of profiled cans, one is a can type and the other is a non-can type. These two methods make the design and requirements of the hemming roller more complicated and difficult to manufacture. Due to the large change of the bending rate, the inertia of the curling roller increases sharply there, which seriously affects the quality of the sealing and also limits Increased production capacity. It is also prone to the phenomenon that the shrinkage is not tight, the precision is not enough, the wrinkles, the curling of the curling, the cracking, etc. do not meet the quality standards. Therefore, generally small-sized shaped cans are mostly formed by a die stamping and sealing process.

The prior art shaped can body and the bottom of the can (top) die stamping and sealing are both double-edged, the process technology is simple, and the defects are poor sealing property, easy to leak, and can not be used for requiring high sealing performance. Canister.

Summary of the invention

The object of the present invention is to provide a small three-piece canned five-layer crimping structure and a winding method thereof, which utilizes die stamping and crimping to change the prior art crimping structure, and effectively improves the sealing performance of the crimping. And the production method is simple and the production efficiency is high.

The five-layer crimping structure of the small three-piece shaped can of the invention comprises a can body curling edge 11 made of the same type of plate material, a can bottom curling edge 21, and the can body curling edge 11 wrapping the can bottom curling edge 21 in the inner roll 90 . Forming a layer 111 of the can body curling edge in sequence - the bottom layer of the can bottom is 212 layers - the bottom layer of the bottom of the can is 213 layers - the layer of the can end of the can body is 114 layers - the bottom of the can bottom 215 is a five-layer structure.

The above three small three-shaped shaped cans have a five-layer crimping structure, and the can body and the bottom of the can are made of a plate of 0.2--0.3 mm thick, and the length of the can end 11 of the can body is 4.5--5.5 mm, and the bottom of the can is curled. The length is 3.5--4.5mm.

The above-mentioned small three-piece shaped can has a five-layer crimping structure, and the can body and the can bottom are made of a 0.23 mm thick plate. The can body curling edge 11 has a length of 5 mm, and the can bottom curling edge 21 has a length of 4 mm.

The above-mentioned small three-piece shaped can five-layer crimping structure sealing method is characterized in that the following steps are included:

1 Select 0.2--0.3mm thick sheet material to cut and cut; separately make the can body and the bottom of the tank;

2 pre-bending the end of the can body curling edge 11, the length of the end pre-bending is 0.8--1.2 mm; pre-rolling the end of the can bottom curling edge 21, the length of the end pre-rolling is 0.8-- 1.2mm;

3 placing the bottom of the can in the can body on the bottom mold, and the root of the bottom edge 21 of the can is on the same horizontal line as the root of the can wrap 11;

4 The bottom of the can and the can body are stamped and formed; the primary punching die is a crimping die, and the cavity of the crimping die is a combination of a semicircular arc and a rectangle, and the diameter of the semicircular arc is 2.1 mm. Its rectangle is 2.1×1.05mm;

5 Performing a second press forming on the basis of step 4; the secondary punching upper die is a linear die.

By adopting the above-mentioned small three-piece can-shaped five-layer crimping structure, the sealing performance is greatly enhanced compared with the prior art, and the moisture-proof performance can be effectively improved, thereby protecting the safety of the food in the box. With the mold sealing method of the present invention, the bead does not produce a "iron tongue", the inside of the bead is free of voids, and The production method is simple and the production efficiency is high.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the structure of a small three-piece shaped can of the present invention.

Figure 2 is an enlarged view of the five-layer crimping structure shown in Figure 1.

Fig. 3 is a schematic view showing the structure of the front edge of the five-layered crimping structure of the small three-piece shaped can of the present invention.

Figure 4 is an enlarged view of Figure 3.

Figure 5 is a schematic view of a hemming die.

Figure 6 is a schematic view of a linear die.

Fig. 7 is a schematic view showing the structure of the crimping structure after crimping.

Figure 8 is a second schematic view of the crimping structure after crimping.

detailed description

The invention will be further described in detail below with reference to the accompanying drawings:

As shown in FIG. 1 , FIG. 2 and FIG. 3 , the five-layer crimping structure of the small three-piece shaped can of the present invention comprises a can body 1 made of the same type of plate and a can body curling edge 11 , a can bottom 2 and a can bottom curling edge 21 . . When the can body 1 and the can bottom 2 are made of a 0.2--0.3 mm thick plate, the length of the can end 11 of the can body is 4.5--5.5 mm, preferably 5 mm; the length of the bottom edge of the can is 3.5- -4.5mm, preferably 4mm. The can body curling edge 11 encloses the inner roll 90 of the can bottom curling edge 21. Forming a layer 111 of the can body curling edge in sequence - the bottom layer of the can bottom is 212 layers - the bottom layer of the bottom of the can is 213 layers - the layer of the can end of the can body is 114 layers - the bottom of the can bottom 215 is a five-layer structure. With such a crimping structure, there is no void inside the curling edge, which effectively improves the sealing property of the sealing structure. The can body curling edge 11 and the can bottom curling edge 21 are rolled inwardly, so that there is no visible flange at the bottom of the can body, and the overall decorative effect of the can body is not affected by the bottom cover curling, and the appearance is also beautiful.

The above-mentioned small three-piece shaped can five-layer crimping structure sealing method:

The bottom of the can and the can body are first made according to the prior art.

See Figure 3, Figure 4, Figure 5, Figure 6,

First step: pre-bend the end portion 11a of the can body curling edge 11, the end portion 11a is pre-bent length of 0.8--1.2 mm; pre-rolling the end portion 21a of the can bottom curling edge 21, the end portion 21a is pre-rolled The length of the roll is 0.8--1.2 mm; as shown in Figures 3 and 4.

The second step: the bottom 2 of the can is placed on the bottom mold, and the root 21b of the bottom edge 21 of the can is located on the same horizontal line as the root 11b of the can wrap 11; as shown in FIG.

The third step: the bottom of the can and the can body are stamped and formed; the primary punching die is a crimping die, and the cavity of the crimping die is a union of a semicircular arc and a rectangle, and a radius of the semicircular arc R It is 2.1 mm, and its rectangular long side A is 2.1, and the wide side B is 1.05 mm; as shown in FIG.

Step 4: Perform a second press forming on the basis of the third step to press the crimp to eliminate the rebound. The secondary punching upper die is a linear die. As shown in Fig. 6, the crimping structure shown in Fig. 7 is obtained by using the linear die shown in Fig. 6. Of course, according to the customer's requirements for the line shape, different linear shapes can be obtained by changing the linear mold to meet the needs of the customer, as shown in Fig. 8 as a flat line shape.

Claims

A three-layered three-piece can-shaped five-layer crimping structure, comprising a can body curling edge (11) made of the same type of sheet material, and a can bottom curling edge (21), characterized in that the can body curling edge (11) covers the can The bottom winding edge (21) is wound 90°; forming the layer of the can body curling edge (111) arranged in sequence - the bottom layer of the can bottom (212) layer - the bottom layer of the can bottom (213) layer - the can body curling edge ( 114) Layer - The bottom of the tank (215) has a total of five layers.
The small three-piece canned five-layer crimping structure according to claim 1, characterized in that the can body and the bottom of the can body made of 0.2--0.3 mm thick plate have a length of the can body (11) of 4.5. --5.5mm, the length of the bottom edge of the can (21) is 3.5--4.5mm.
The small three-piece can-shaped five-layer crimping structure according to claim 1, characterized in that the can body and the can bottom made of a 0.23 mm thick plate have a can body curling edge (11) having a length of 5 mm and a can. The length of the bottom winding edge (21) is 4 mm.
The method for encapsulating a small three-piece canned five-layer crimping structure according to claim 2, comprising the steps of:

1 Select 0.2--0.3mm thick sheet material to cut and cut; separately make the can body and the bottom of the tank;

2 pre-bending the end of the can body curling edge (11), the length of the end pre-bending is 0.8--1.2 mm; pre-rolling the end of the can bottom curling edge (21), the length of the end pre-rolling 0.8--1.2mm;

3 placing the bottom of the can in the can body on the bottom mold, and the root of the bottom edge of the can is located on the same horizontal line as the root of the can end (11);

4 The bottom of the can and the can body are stamped and formed; the primary punching die is a crimping die, and the cavity of the crimping die is a combination of a semicircular arc and a rectangle, and the diameter of the semicircular arc is 2.1 mm. Its rectangle is 2.1×1.05mm;

5 Performing a second press forming on the basis of step 4; the secondary punching upper die is a linear die.