CN106672390B - Pressure-resistant basic lid, easy open cover and the pop can with easy open cover - Google Patents

Abstract

The invention relates to a pressure-resistant basic cover, an easy-open cover and a pop-top can with an easy-open cover. The cross-section of the basic cover from the periphery to the center is a sealing area, a countersunk section, a collar segment, and a collar The upward extension section and the center cover surface are characterized in that the countersunk section is composed of the first straight line section (L1), the fourth arc section (R4), and the fifth arc section (R5), and the upward extension section of the collar is composed of the second The straight line segment (L2) and the seventh arc segment (R7); the fifth arc segment (R5) and the ring arc segment (R6) are located on both sides with the auxiliary line A as the dividing line; the fifth arc segment ( The projection distance (H1) between the center (Y5) of R5) and the center (Y6) of the encircling arc segment (R6) on the auxiliary line A is less than or equal to the value of the radius of the encircling arc segment (R6).

Description

Pressure-resistant basic lids, easy-open lids and cans with easy-open lids

technical field

The invention relates to a basic cover, an easy-open cover and a pop-top can, in particular to a pressure-resistant basic cover, an easy-open cover and a pop-top can with an easy-open cover capable of saving materials.

Background technique

Easy-open lids came out in the 1960s and are widely used in the matching packaging of beverage cans and beer cans. Due to the many advantages of light weight, small size, and reusable waste materials, easy-open lids have been vigorously promoted all over the world and have formed a huge production scale. With the continuous growth of the market demand for easy-open ends, the easy-open end industry is also developing rapidly, and the competition is becoming more and more fierce. Therefore, in order to save resources and reduce costs to meet the needs of market competition, research and develop a pressure-resistant easy-open end that saves materials. Covering is not only the need for the survival and development of enterprises, but also the necessity of the development of market economy.

In the prior art, one of the representative structures can be found in the CN201530522U Chinese invention. The structure of the easy-open lid disclosed in this patent is: it consists of two parts: the lid body and the pull ring riveted on the lid body; segment, the turning collar arc segment, the upward extending section of the collar upwards and the horizontal center cover surface, an annular groove is formed between the countersunk section and the upward extending section of the collar; segment, the intermediate transition arc and the vertical lower countersunk segment connection. Above-mentioned patent scheme is to reduce blanking size, but its pressure resistance performance is still not enough.

In the prior art, the second representative structure can be referred to the Chinese invention patent of CN100435997C. The cover structure disclosed in this patent discloses that the countersunk section is sequentially composed of an inner wall part, a joint, an upper wall part, a wall part, an upper wall part and an outer wall part. The above-mentioned patent scheme has good pressure resistance under the premise of saving materials. However, because the countersunk section is composed of multiple sections, it is difficult to form, especially the inflection point formed here in the wall part, which is particularly difficult to form, and the requirements for the mold are too high. , the actual production is difficult to reach the theoretical design size.

Therefore, how to simplify the structure and reduce the difficulty of production under the premise of saving materials and ensuring the pressure resistance performance has become an important issue.

Contents of the invention

The purpose of the present invention is to provide a pressure-resistant basic lid, an easy-open lid and a pop-top can with an easy-open lid, so as to simplify the structure and reduce production difficulty on the premise of saving materials and ensuring pressure-resistant performance.

In order to achieve the above purpose, the technical solution of the basic cover used in the present invention is: a pressure-resistant basic cover. The cross section of the basic cover from the periphery to the center is the sealing area, the countersunk section, the collar segment, and the collar section. an upwardly extending section and a central cover surface, an annular groove is formed between the countersunk section and the upwardly extending section of the collar;

The countersunk segment is composed of a first straight line segment, a fourth circular arc segment, and a fifth circular arc segment. The first end of the first straight line segment is connected to the corresponding end of the sealing area, and its second end is connected to the fourth circular arc segment. The first end of the arc segment is connected, and the first straight line segment is tangent to the fourth arc segment; the second end of the fourth arc segment is connected to the first end of the fifth arc segment, and the fourth arc segment The segment is circumscribed with the fifth circular arc segment; the second end of the fifth circular arc segment is connected with the first end of the collared arc segment, and the fifth circular arc segment is circumscribed with the collared circular arc segment; the The upward extension section of the collar is composed of a second straight line segment and a seventh arc segment, the first end of the second straight line segment is connected with the second end of the arc segment of the collar, and the second straight line segment is connected with the arc segment of the collar segment tangent; the second end of the second straight line segment is connected to the first end of the seventh arc segment, and the second straight line segment is tangent to the seventh arc segment; the second end of the seventh arc segment The end is connected with the central cover, and the seventh arc segment is tangent to the central cover;

The radius of the fifth arc segment is greater than or equal to 2.5mm and less than or equal to 5mm;

The radius of the collar segment is greater than or equal to 0.25mm and less than or equal to 0.6mm;

The radius of the fourth arc segment is greater than or equal to 0.1mm and less than or equal to 3mm;

The connection point between the fifth arc segment and the encircling arc segment is the auxiliary point Q1, and the straight line passing through the auxiliary point Q1 perpendicular to the center cover is the auxiliary line A; the fifth arc segment and the encircling arc The segment is located on both sides of the auxiliary line A with the auxiliary line A as the dividing line;

The projected distance between the center of the fifth arc segment and the center of the encircling arc segment on the auxiliary line is less than or equal to the value of the radius of the enclosing arc segment;

The projected distance from the center of the ring arc segment to the outer edge of the basic cover in the direction perpendicular to the auxiliary line A is greater than or equal to 0.9 times the countersunk depth and less than or equal to 1.15 times the countersink depth; the countersink depth is Refers to the maximum projected distance between the seaming area and the ring segment on the auxiliary line A;

The angle of the countersink angle β of the countersink section is greater than or equal to 0° and less than or equal to 30°; the countersink angle β of the countersink section is the angle between the first straight line segment and a vertical line perpendicular to the center cover surface;

The angle of the extension angle α of the upward extension section of the collar is greater than or equal to 0°, and less than or equal to 40°; the extension angle α of the upward extension section of the collar is the second straight line section and the vertical to the center cover surface (L3 ) of the vertical line.

In the above solution, the seaming area is formed by sequentially tangentially connecting the first arc segment, the second arc segment and the third arc segment.

In order to achieve the above-mentioned purpose, the technical solution of the easy-open lid adopted in the present invention is: a pressure-resistant easy-open lid, including a basic lid and a pull ring, and the structure of the basic lid is the basic lid solution as described above.

In order to achieve the above-mentioned purpose, the technical solution of the pop can used in the present invention is: a pressure-resistant pop can, comprising a tank body and an easy-open lid, the easy-open lid includes a basic lid and a pull ring, and the basic lid structure is as described above. cover scheme.

The design principle of the present invention is: the utility model is that the countersunk section is designed to only be made up of the first straight line segment L1, the fourth arc segment R4, and the fifth arc segment R5, and the upward extension of the collar is composed of the second straight line Section L2 and the seventh arc section R7 seem to be a simple simplification of the prior art CN100435997C, but in fact it breaks through the limitation of design thinking in this field. It is necessary to add more inflection points in the countersunk section to improve the pressure resistance performance, but the present invention formally breaks through this limitation of thinking, and relies on the fifth arc segment R5, the ring arc segment R6, and the fourth arc segment R4 The size selection of W1 is greater than or equal to 0.9 times T1, and T1 is less than or equal to 1.15 times, as well as the technical features such as the angle defining the countersunk angle β of the countersink section and the extension angle α of the upward extension section of the collar. It has achieved the same or even slightly higher pressure resistance performance than that of the prior art CN100435997C, and it is an important breakthrough in this field to achieve such a high pressure resistance performance with such a simplified structure.

The advantages of the present invention compared with prior art are as follows:

1. In terms of structure, the countersunk section of the prior art CN100435997C is composed of six or seven straight lines or arcs, which is difficult to form, especially the small arc inflection point is particularly difficult to form, and the production difficulty is obviously very high. It is difficult to ensure the size during actual production The precision; while the countersunk section of the structure of this embodiment is only composed of the first straight line segment L1, the fourth arc segment R4, and the fifth arc segment R5, the transition is smooth, and the molding aspect is obviously more, which significantly reduces the production difficulty and cost. ;

2. Pressure resistance performance. The finite element analysis results prove that the pressure resistance performance of the basic cover (marked as SLAC) of this embodiment is equal to or even slightly higher than that of the basic cover (marked as CDL) of the prior art CN100435997C.

Description of drawings

Fig. 1 is a partial schematic diagram of a cross-section of an embodiment of the present invention;

Fig. 2 is the finite element analysis chart of the comparison of the pressure resistance effect of the 200 cover type of the embodiment of the present invention and the disclosed scheme of the prior art CN100435997C;

Fig. 3 is a finite element analysis graph comparing the pressure resistance effect of the cover type 202 of the embodiment of the present invention and the scheme disclosed in the prior art CN100435997C.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing and embodiment:

Embodiment 1: See Figure 1, a pressure-resistant basic cover:

The cross-section of the pressure-resistant basic cover is sequentially from the periphery to the center: the sealing area, the countersunk section, the arc section of the collar, the upward extension section of the collar, and the central cover surface. An annular groove is formed between them.

The seaming area is formed by sequentially tangentially connecting the first arc segment R1 , the second arc segment R2 and the third arc segment R3 .

The countersunk section is composed of a first straight line segment L1, a fourth arc segment R4, and a fifth arc segment R5. The first end of the first straight line segment L1 is connected to the corresponding end of the sealing area, and its second end is connected to the corresponding end of the sealing area. The first end of the fourth arc segment R4 is connected, and the first straight line segment L1 is tangent to the fourth arc segment R4; the second end of the fourth arc segment R4 is connected to the first end of the fifth arc segment R5 The ends are connected, and the fourth arc segment R4 is circumscribed to the fifth arc segment (R5); the second end of the fifth arc segment R5 is connected to the first end of the ring arc segment R6, and the fifth The arc segment R5 is circumscribed with the ring segment R6.

The upward extension of the collar is composed of a second straight line segment L2 and a seventh arc segment R7, the first end of the second straight line segment L2 is connected to the second end of the collar arc segment R6, and the second straight line Segment L2 is tangent to ring segment R6; the second end of the second straight line segment L2 is connected to the first end of the seventh arc segment R7, and the second straight line segment L2 is connected to the seventh arc segment R7 Tangent; the second end of the seventh arc segment R7 is connected to the central cover surface L3, and the seventh arc segment R7 is tangent to the central cover surface L3. The central cover surface L3 may be a plane or a substantially plane including a partially curved surface.

The radius of the fifth arc segment R5 is greater than or equal to 2.5 mm and less than or equal to 5 mm.

The radius of the collar segment R6 is greater than or equal to 0.25mm and less than or equal to 0.6mm.

The radius of the fourth arc segment R4 is greater than or equal to 0.1 mm and less than or equal to 3 mm.

The connection point between the fifth arc segment R5 and the ring-shaped arc segment R6 is the auxiliary point Q1, and the straight line passing through the auxiliary point Q1 and perpendicular to the center cover surface L3 is the auxiliary line A; the fifth arc segment R5 and The ring segment R6 is located on both sides of the auxiliary line A with the auxiliary line A as the dividing line.

The projection distance H1 of the center Y5 of the fifth arc segment R5 and the center Y6 of the ring segment R6 on the auxiliary line A is less than or equal to the value of the radius of the ring segment R6, preferably the projection distance H1 is zero.

The projected distance W1 from the center Y6 of the collar segment R6 to the outer edge of the basic cover in the direction perpendicular to the auxiliary line A is greater than or equal to 0.9 times the countersunk depth T1 and less than or equal to 1.15 times the countersunk depth T1. The countersunk depth T1 refers to the maximum projected distance between the seaming area and the arc segment R6 (inner bottom of the arc segment R6) on the auxiliary line A.

The angle of the countersink angle β of the countersink section is greater than or equal to 0° and less than or equal to 30°; the countersink angle β of the countersink section is the angle between the first straight line segment L1 and the vertical line perpendicular to the central cover surface L3 .

The extension angle α of the upward extension section of the collar is greater than or equal to 0° and less than or equal to 40°; the extension angle α of the upward extension section of the collar is the second straight line segment L2 and the vertical to the central cover surface L3 The angle between the vertical lines of .

The structure of this embodiment is compared with the prior art CN100435997C:

1. In terms of structure, the countersunk section of the prior art CN100435997C is composed of six or seven straight lines or arcs, which is difficult to form, especially the small arc inflection point is particularly difficult to form, and the production difficulty is obviously very high. It is difficult to ensure the size during actual production The precision; while the countersunk section of the structure of this embodiment is only composed of the first straight line segment L1, the fourth arc segment R4, and the fifth arc segment R5, the transition is smooth, and the molding is obviously more convenient, which significantly reduces the production difficulty and cost;

Second, the pressure resistance performance, the following is proved by finite element analysis:

Setting the basic cover of this embodiment and the basic cover of the prior art CN100435997C, the material properties involved, the material thickness, the loading mode of the model, the finite element calculation method, the grid size, the unit type and other conditions are all the same, and the only difference is the basic cover. The structure of the cover.

Taking the 200 cover as an example, the finite element analysis chart is shown in Figure 2. The pressure resistance value of the basic cover (marked as SLAC) of this embodiment is 679.823KPa, while the pressure resistance value of the basic cover (marked as CDL) of the prior art CN100435997C The value is 674.624KPa.

Taking the 202 cover as an example, the finite element analysis chart is shown in Figure 3. The withstand voltage value of the basic cover (marked as SLAC) of this embodiment is 649.35KPa, while the withstand voltage value of the basic cover (marked as CDL) of the prior art CN100435997C The value is 639.175 KPa.

The left vertical axis of the above-mentioned Figures 2 and 3 represents the withstand voltage value, while the right vertical axis represents the volume of the basic cover, and the horizontal axis is the parameter calculated by the finite element, so the peak value of the specific curve represents the withstand voltage value, but the shape of the curve and the time when the peak appears are not particularly meaningful.

Therefore, it can be seen from the above finite element analysis results that the withstand voltage performance of the basic cover (marked as SLAC) of this embodiment is equal to or even slightly higher than that of the basic cover (marked as CDL) of the prior art CN100435997C.

Embodiment 2: A pressure-resistant easy-open lid, including a basic lid and a pull ring. The structure of the basic lid is the same as that described in Embodiment 1, and will not be repeated here.

Embodiment 3: A pressure-resistant pop can, including a can body and an easy-open lid. The easy-open lid includes a basic lid and a pull ring. The structure of the basic lid is the same as that described in Embodiment 1, and will not be repeated here.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims (6)

1. It is covered 1. a kind of pressure resistance is basic, is followed successively by sealed cans region from periphery to center on the cross section covered substantially, immerses oneself in section, capel Arc section, capel upwardly extend section and center capping, it is described immerse oneself in section and capel upwardly extend section between form annular groove；

   It is characterized in that：The section of immersing oneself in is by first straight line section（L1）, the 4th arc section（R4）, the 5th arc section（R5）Composition, The first straight line section（L1）First end connect with the corresponding end in sealed cans region, second end and the 4th arc section（R4） One end connects, and first straight line section（L1）With the 4th arc section（R4）It is tangent；4th arc section（R4）Second end and the Five arc sections（R5）First end connection, and the 4th arc section（R4）With the 5th arc section（R5）It is circumscribed；5th arc section （R5）Second end and capel arc section（R6）First end connection, and the 5th arc section（R5）With capel arc section（R6）Outside It cuts；The capel upwardly extends section by second straight line section（L2）With the 7th arc section（R7）Composition, the second straight line section（L2） First end and capel arc section（R6）Second end connection, and second straight line section（L2）With capel arc section（R6）It is tangent；Institute State second straight line section（L2）Second end and the 7th arc section（R7）First end connection, and second straight line section（L2）With the 7th circle Segmental arc（R7）It is tangent；7th arc section（R7）Second end and center capping（L3）Connection, and the 7th arc section（R7）With Center capping（L3）It is tangent；

   5th arc section（R5）Radius be greater than or equal to 2.5mm, and be less than or equal to 5mm；

   The capel arc section（R6）Radius be greater than or equal to 0.25mm, and be less than or equal to 0.6mm；

   4th arc section（R4）Radius be greater than or equal to 0.1mm, and be less than or equal to 3mm；

   5th arc section（R5）With capel arc section（R6）Tie point be auxiliary magnet Q1, by auxiliary magnet Q1 perpendicular to Center capping（L3）Straight line be auxiliary line A；5th arc section（R5）With capel arc section（R6）It is boundary with auxiliary line A Line is located at the both sides of auxiliary line A；

   5th arc section（R5）The center of circle（Y5）With capel arc section（R6）The center of circle（Y6）Projection on auxiliary line A away from From（H1）Less than or equal to capel arc section（R6）The numerical value of radius；

   The capel arc section（R6）The center of circle（Y6）To the outer rim covered substantially the projection perpendicular to the directions auxiliary line A away from From（W1）Depth is immersed oneself in more than or equal to 0.9 times（T1）, and immerse oneself in depth less than or equal to 1.15 times（T1）；It is described to immerse oneself in Depth（T1）Refer to sealed cans region and capel arc section（R6）Projection maximum distance on auxiliary line A；

   The angle for immersing oneself in angle beta for immersing oneself in section is greater than or equal to 0 °, and is less than or equal to 30 °；It is described immerse oneself in section immerse oneself in angle beta For first straight line section（L1）With perpendicular to center capping（L3）Vertical line angle；

   The angle that the capel upwardly extends the angle of strike α of section is greater than or equal to 0 °, and is less than or equal to 40 °；The capel to The angle of strike α of upper extended segment is second straight line section（L2）With perpendicular to center capping（L3）Vertical line angle.
2. 2. the basic lid of pressure resistance according to claim 1, it is characterised in that：The sealed cans region is by the first arc section（R1）, Two arc sections（R2）And third arc section（R3）It is tangent successively to be formed by connecting.
3. 3. a kind of pressure resistance easy open cover, including cover substantially and draw ring, it is characterised in that：The basic lid is described in claim 1 Basic lid.
4. 4. pressure-resistant easy open cover according to claim 3, it is characterised in that：The sealed cans region is by the first arc section（R1）, Two arc sections（R2）And third arc section（R3）It is tangent successively to be formed by connecting.
5. 5. a kind of pressure resistance pop can, including tank body and easy open cover, the easy open cover includes basic lid and draw ring, it is characterised in that： The basic lid is basic lid described in claim 1.
6. 6. pressure-resistant pop can according to claim 5, it is characterised in that：The sealed cans region is by the first arc section（R1）, Two arc sections（R2）And third arc section（R3）It is tangent successively to be formed by connecting.