JP2006264718A - Tube container having thin-walled part, and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tube container which does not form a crack upon pushing out contents, thus makes it easy to squeeze out the contents completely. <P>SOLUTION: The tube container comprises a body which stores the contents, a shoulder which is formed at the end of the trunk, and a mouth which has an opening continuous with the shoulder. A thin-walled part is formed at the body immediately below the shoulder. At the thin-walled part, the outer peripheral surface at the intersection between the shoulder and the trunk is radiused 0.3 to 2.0 mm. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tube container, and more particularly to a tube container that can easily squeeze the contents to the end without causing cracks in the tube container.

Conventionally, there is a tube container 100 as shown in FIG. In FIG. 10, the body 101 includes a body 101 for storing contents, a shoulder 102 provided at the tip of the body 101, and a mouth 104 formed with an opening 103 continuous to the shoulder 102. Is a tube container 100 in which a thin portion 105 is formed. The thickness of the thin portion 105 is about 40% to 90% with respect to the thickness of the barrel 101 in order not to cause damage to the barrel 101 when the contents in the tube container 100 are squeezed out. It is thin. Further, the thin portion 101 is formed near the shoulder 102, that is, near the upper end of the body 101. By forming the thin wall portion 105 in the body portion 101, the body portion 101 can be easily folded at the thin wall portion 105, and the contents can be easily squeezed out. Therefore, the remaining amount of the contents in the body 101 can be remarkably reduced, and the contents can be reliably prevented from remaining in the tube container 100.
Japanese Patent Application No. 2005-3465

  However, in the above conventional example, the thickness of the body 101 of the normal tube container is 0.8 to 1.0 mm, and the thickness of the thin portion 105 is 0.5 to 0.7 mm. For this reason, when the thin portion 105 is pressed when the contents are pushed out, there is a defect that the thin portion 105 is cracked as shown in FIG. This is because the rounded portion is not formed on the outer peripheral surface and inner peripheral surface of the intersection of the shoulder portion 102 and the thin portion 105, and the shoulder portion 102 is formed thick, so that the shoulder portion 102 is not pressed when the contents are pressed. This is because when the thin portion 105 is pressed without being deformed, an abnormally large load is partially applied to the thin portion 105, and a crack is generated at a portion where the large load is applied. This invention pays attention to such drawbacks, and when the contents are pushed out, the contents accommodated in the tube container 100 without causing cracks in the thin part 105 of the body part 101 of the tube container 100, It aims at providing the tube container which can make it easy to squeeze the contents to the last, without remaining in the tube container 100. FIG.

  According to a first aspect of the present invention, there is provided a solution means comprising: a trunk portion for storing contents; a shoulder portion provided at a tip of the trunk portion; and a mouth portion formed with an opening continuous with the shoulder portion. In the tube container characterized in that a thin-walled portion is formed in the body portion immediately below, the outer peripheral surface of the intersection of the shoulder portion and the body portion is formed to be 0.3 to 2.0 mm. A tube container having a thin wall portion. Since the round is provided on the outer peripheral surface of the intersection of the shoulder portion and the trunk portion, when the contents are pushed out, there is no possibility of cracking in the thin-walled portion, and the contents can be pushed out easily.

  According to a second aspect of the present invention, there is provided a tube container having a thin-walled portion, wherein the radius of the inner peripheral surface of the intersection of the shoulder portion and the trunk portion is 0.2 to 1.0 mm. Not only the outer peripheral surface of the intersection of the shoulder and the trunk, but also the inner peripheral surface of the intersection of the shoulder and the trunk, prevents cracks in the thin-walled part further when pushing out the contents. it can.

  According to a third aspect of the present invention, there is provided a tube container characterized in that the shoulder has a thickness of 0.3 to 0.8 mm. By reducing the thickness of the shoulder, when the contents are pushed out, the shoulder is bent and deformed, so that it is possible to prevent a concentrated load from being applied to a part of the thin portion. The crack of a part can be prevented.

  According to a fourth aspect of the present invention, when the impact slag is punched out with a male mold, a step projecting inward is formed in the vicinity of the intersection of the female mold shoulder and the female mold barrel on the inner peripheral surface of the female mold. By narrowing the gap between the stepped portion and the male mold, the flow rate of the impact slag in the direction of the body portion is limited, and a body portion having a thin portion is formed near the shoulder portion of the metal tube. In the method of manufacturing a metal tube container, the radius of the intersection of the female shoulder and the step is formed to 0.3 to 2.0 mm, and the intersection of the male shoulder and the male trunk is formed. A round container is formed to 0.2 to 1.0 mm. The formation of the step can limit the flow rate of the impact slag toward the trunk, but it forms a round at the intersection of the female shoulder and the female trunk, or a round at the intersection of the male shoulder and the male trunk. By reducing the thickness of the shoulder, the impact slug can flow more smoothly and stably in the direction of the trunk, and the dimension of the molded trunk is also stable.

According to the tube container having a thin portion according to the present invention, when the contents are pushed out, the contents accommodated in the tube container are allowed to remain without causing cracks in the thin portion of the body portion of the tube container. There is an effect that the contents can be easily squeezed out to the end. Moreover, according to the manufacturing method of the tube container which has a thin part concerning this invention, an impact slug can be poured more smoothly and stably toward a trunk | drum. And the dimension of each part of the trunk | drum of the molded tube container is also stabilized.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows Example 1 of the present invention, and the tube container 7 of Example 1 may be any tube container of a metal tube, a laminate tube, a single layer or a multilayer resin tube. A mouth 2 having an opening 1 for taking in and out the contents, a tapered shoulder 3 inclined uniformly downward from the mouth 2, and the contents continuing below the shoulder 3 are accommodated. It is comprised from the trunk | drum 4 to do. The mouth portion 2 has a cylindrical shape, and a male screw 5 that is screwed with a cap (not shown) is formed on the outer peripheral wall. The trunk | drum 4 has comprised the cylindrical shape, and the lower end part is crushed in flat shape, and is sealed by bending double or triple toward the opening part 2. FIG. Further, a thin-walled portion 6 having a small thickness is formed in the vicinity immediately below the shoulder portion 3, that is, at the upper end position of the body portion 4. The thin wall portion 6 is formed so that the outer peripheral wall has a stepped shape, but is not necessarily limited to this form, and may be formed thin so that the inner peripheral wall has a stepped shape. And as shown in FIG. 2, since R1 (8) and R2 (9) were formed in the outer peripheral surface or the inner peripheral surface, and the thickness of the shoulder portion 3 was formed to be thin, When the contents are squeezed out, the thin part 6 of the trunk part 4 near the shoulder part 3 can be easily folded into the shoulder part 3 without causing cracks in the thin part 6. Needless to say, the contents in the shoulder 3 can be completely squeezed out. Therefore, it is possible to reliably prevent the contents from remaining in the tube container.

  Regarding the tube container 7, various sizes can be mentioned depending on the contents filled in the tube container 7. As for the thickness of the thin wall portion 6, when the body portion 4 is folded, it has a strength that does not cause damage to the body portion 4, and it is possible to easily squeeze almost all the contents in the tube container 7. As shown, the thickness of the thin portion 6 is 40% to 80% of the thickness of the body portion 4. And the radius R1 of the outer peripheral surface of the intersection of the shoulder portion 3 and the trunk portion 4 is formed to 0.3 to 2.0 mm, and the radius R2 (9) of the inner peripheral surface is formed to 0.2 to 1.0 mm. Further, since the thickness of the shoulder portion 3 is formed to be 0.3 to 0.8 mm, as shown in FIG. 5, the shoulder portion 3 is curved and deformed when the contents are pushed out (arrow direction). It is possible to prevent a load from being concentrated on a part of the thin portion 6. That is, the thin-walled portion can be prevented from cracking due to the deformation of the shoulder portion. When both the outer peripheral surface R1 (8) and the inner peripheral surface R2 (9) are formed, or either the outer peripheral surface R1 (8) or the inner peripheral surface R2 (9). It may be formed.

  The tube container 7 applied to the present invention is a metal tube, a laminate tube, a single layer or a multilayer resin tube, or the like. In the case of a metal tube container, it is desirable to apply an inner surface coating to the inner peripheral surface of the tube container 7 in order to prevent metal corrosion due to the contents. Examples of the inner surface coating include a thermosetting resin, a thermoplastic resin, a dispersion type coating, or a low temperature curing type coating. By coating one or two types of the inner surface coating on the inner peripheral surface of the tube container 7, Metal corrosion can be more effectively prevented. It is very effective to use epoxy phenol as the thermosetting resin, vinyl organosol as the thermoplastic resin, acid-modified polyethylene or acid-modified polypropylene as the dispersion type paint, and epoxy melamine as the low-temperature curable type paint. It is desirable.

  FIG. 3 shows a second embodiment of the present invention. The difference from the first embodiment is that the cap 20 is removed from the inner peripheral surface of the mouth portion 12 when not in use, and the contents are accidentally exposed to the outside. A sealing lid 11 is formed to prevent the contents from touching the outside air. In addition, the cap 20 is not screwed and attached to the mouth portion 12, but the cap 20 is detachably fitted and attached. On the outer peripheral wall of the mouth portion 12, an inclined portion 18 and a protruding portion 19 are integrally formed in order downward. The cap 20 has a circular cross section, and a fitting cylinder 21 is formed inside the cap 20. A top surface 22 is formed at the center of the fitting cylinder 21 in the vertical direction, and a locking piece 23 that is elastically engaged with the protrusion 19 of the mouth 12 is fitted at the lower end. A plurality of cylinders 21 are formed all around the inner surface. On the top surface 22, a protruding portion 24 for opening the sealing lid 11 of the mouth portion 12 protrudes upward. In the case of opening, the sealing lid 11 can be broken by removing the cap 20 and inverting and piercing the protruding portion 24 into the sealing lid 11 from above.

  In the mouth portion 12 and the cap 20 of the tube container 17 formed in this way, when the cap 20 is fitted to the mouth portion 12, the mouth portion 12 is inserted into the fitting cylinder 21 of the cap 20, and the cap 20 The locking piece 23 of the cap 20 is elastically fitted to the protruding portion 19 via the inclined portion 18 formed in the mouth portion 12 by simply pressing the upper portion of the cap 20 with a finger. On the contrary, when the fitting between the mouth portion 12 and the cap 20 is released, the lower end of the cap 20 is curved only by pressing the side surface of the cap 20 inward, and the central portion bulges in the outward direction accordingly. Therefore, the lower end rides on the shoulder portion 13 of the tube container 17, and the cap 20 and the fitting cylinder 21 move upward. Then, the engagement between the locking piece 23 of the fitting cylinder 21 and the protrusion 19 of the mouth portion 12 is released. As described above, the cap 20 is detachably fitted to the mouth portion 12 of the tube container, so that the cap 20 is attached to the mouth portion 12 of the tube container by a one-touch operation that lightly presses the upper portion of the cap 20. Therefore, the cap 20 can be easily attached.

  FIG. 4 shows a third embodiment of the present invention, in which a thin portion 46 is formed on the upper portion of the trunk portion 44, the outer peripheral surface of the intersection of the shoulder portion 43 and the trunk portion 44, and the shoulder portion 43 and the trunk portion 44. Similar to the first embodiment, the Rs R1 and R2 are formed on the inner peripheral surface of the intersection point, respectively, and the thickness of the shoulder portion 43 is thin. The difference from the first embodiment is that an inner cylinder 48 is inserted into the metal tube container 47. That is, an inner cylinder 48 in which a mouth portion, a shoulder portion, and a trunk portion are integrally formed is fitted inside the tube container 47. The tip of the mouth portion 49 of the inner cylinder 48 is bent outward from the shoulder portion 43 of the tube container 47 so as to cover the tip of the mouth portion 42 as shown in FIG. 4, and the inner plug body 45 is press-fitted from above. . A cap is screwed onto the inner plug body 45 (not shown), and the opening 41 is closed. In this way, by covering the front end of the mouth portion 42 of the metal tube container 47 by bending it outward, the contents can be prevented from adhering to the metal portion of the mouth portion 42 and corroding the mouth portion 42. The material of the inner cylinder 48 is made of polyethylene, a single-layer synthetic resin such as polypropylene or nylon, or a multilayer synthetic resin such as these synthetic resins and modified polyethylene or ethylene / vinyl alcohol copolymer.

  FIGS. 6-8 shows Example 4 of this invention and has shown the Example of the invention which shows the manufacturing method of the metal tube container based on this invention. It is known that a metal tube is generally manufactured by impact molding in which an impact slug 55 placed in a female mold 50 is punched with a male mold 54. The manufacturing method of the present invention is characterized in that a stepped portion 53 that protrudes inward is formed in the vicinity of the intersection of the female shoulder portion 51 on the inner peripheral surface of the female die 50 and the female trunk portion 52. Then, by placing the impact slug 55 in the female mold 50 having such a step portion 53 and punching out with the male die 54, by narrowing the gap between the step portion 53 and the male die 54, The amount of the impact slug 55 that flows in the body direction can be limited. However, if the stepped portion 53 is formed at an arbitrary portion of the female mold 50, a thin portion cannot be formed at a desired portion of the body portion of the metal tube container. As a result of the ingenuity, the inventors formed an R Q1 (56) at the intersection of the female shoulder 51 and the stepped portion 53, and an R Q2 (57) at the intersection of the male shoulder 58 and the male trunk 59. Thus, it has been found that the impact slug can be flowed more smoothly and stably in the direction of the body portion, and the dimensions of the respective portions of the body portion 4 of the tube container 7 are stabilized.

  And as shown in FIG. 9, while forming the rounded Q1 (56) of the intersection of the female type | mold shoulder part 51 and the step part 53 in 0.3-2.0 mm, the male type | mold shoulder part 58 and the male type | mold trunk | drum The radius Q2 (57) at the intersection of 59 is formed to be 0.2 to 1.0 mm. 6 to 8 are drawings in which the appearance of the male mold 54 approaching the female mold 50 is expressed step by step in the order of gaps L, S, and M (the dimension of the gap is L> S> M). . FIG. 6 is a cross-sectional view showing a state in which the impact slug 55 flows in the direction of the female body 52 when the gap between the male mold 54 and the female mold 50 is separated (interval L). FIG. 10 is a cross-sectional view showing a state in which the impact slug 55 flows in the direction of the female torso 52 in a state where the gap between the male mold 54 and the female mold 50 is closer than the distance L (interval S). 6 and 7, the impact slug 55 is not affected by the stepped portion 53. Therefore, the flow in the direction of the female die 52 is equivalent to the thickness of the barrel 4 of the normal metal tube container. Only flows. FIG. 8 is a cross-sectional view showing a state in which the impact slug 55 flows in the direction of the female body 52 in a state where the gap between the male mold 54 and the female mold 50 is closer and narrower (interval M). In this state, the impact slug 55 is directly affected by the stepped portion 53 protruding inward and flows by the thickness of the thin portion. In this way, the thin-walled portion 6 is formed in the body portion 4 near the shoulder portion 3 of the metal tube container 7 shown in FIG. The radius Q1 (56) of the intersection of the female shoulder 51 and the stepped portion 53 is formed to 0.3 to 2.0 mm, and the intersection radius Q2 (57) of the male shoulder 58 and the male trunk 59 is formed. Therefore, the impact slag can flow more smoothly and stably in the body direction. And the effect which also stabilizes the dimension of each part of the trunk | drum 4 of the shape | molded tube container 7 is show | played.

Sectional drawing which shows Example 1 of the tube container which has a thin part which concerns on this invention. The expanded sectional view which showed R R1 and R R2 of Example 1 of the tube container which has a thin part which concerns on this invention. Sectional drawing which shows Example 2 of the tube container which has a thin part based on this invention. Sectional drawing which shows Example 3 of the tube container which has a thin part based on this invention. In Example 1 of the tube container which has a thin part which concerns on this invention, the expanded sectional view which shows the state in which the shoulder part is curving at the time of extrusion. Sectional drawing which shows Example 4 which shows the manufacturing method of the tube container which has a thin part based on this invention. Sectional drawing which shows Example 4 which shows the manufacturing method of the tube container which has a thin part based on this invention. Sectional drawing which shows Example 4 which shows the manufacturing method of the tube container which has a thin part based on this invention. Sectional drawing which shows R Q1 and R Q2 in Example 4 which is a manufacturing method of the tube container which has a thin part based on this invention. Sectional drawing which shows the tube container which has the conventional thin part. Sectional drawing which shows the tube container which has the conventional thin part.

Explanation of symbols

4 14 44 trunk 3 13 43 shoulder 1 41 opening 2 12 mouth 6 16 46 thin part 7 17 47 tube container 8 R 1
9 R R2
3 shoulder (wall thickness T)
50 Female mold 51 Female mold shoulder 52 Female mold body 53 Step section 54 Male mold 55 Impact slug 56 Earl Q1
57 R Q2
L, S, M Clearance

Claims (4)

A body part for storing the contents, a shoulder part provided at the tip of the body part, and a mouth part formed with an opening continuous to the shoulder part; In the tube container characterized in that the portion is formed, the radius of the outer peripheral surface of the intersection of the shoulder portion and the trunk portion,
A tube container having a thin portion characterized by being formed to have a thickness of 0.3 to 2.0 mm. The tube container according to claim 1, wherein a radius of an inner peripheral surface of an intersection of the shoulder portion and the trunk portion is formed to be 0.2 to 1.0 mm. The tube container according to claim 1 or 2, wherein the shoulder has a thickness of 0.3 to 0.8 mm. A step protruding inward is formed in the vicinity of the intersection of the female shoulder of the female inner peripheral surface and the female body, and when the impact slag is punched out by the male mold, the step between the step and the male mold is formed. Manufacturing a metal tube container characterized by narrowing the gap to limit the flow rate of the impact slag toward the barrel and forming a barrel having a thin portion near the shoulder of the metal tube. In the method, the radius of intersection of the female shoulder portion and the step portion is formed to 0.3 to 2.0 mm, and the radius of intersection of the male shoulder portion and the male trunk portion is set to 0.2 to 1. A method for producing a tube container, wherein the tube container is formed to 0 mm.

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