Foam dispensing container and method for manufacturing the same

Abstract

Even if vertically extending grooves are formed on the inner circumferential surface of the upper end of the storage section during the extrusion blow molding of the container body, the upper end opening of the storage section is sealed. [Solution] The container body 10 has a storage section 13 in which the liquid contents are contained and which is elastically deformable in at least a part thereof, and a mouth section 11 extending upward from the upper end 13c of the storage section, and a cap body 20 attached to the mouth section, the cap body having a foam discharge hole 22 for discharging foam from the liquid contents, the container body having a communication passage 14 that connects the inside of the storage section and the inside of the mouth section, and a seal cylinder 15 provided in the mouth section and extending upward from the upper opening edge of the storage section, and is an extruded blow molded body with the seal cylinder as an insert, the seal cylinder is made of a material with a higher heat resistance temperature than the material that forms the parts of the container body other than the seal cylinder, and the cap body is provided with a seal section 29 that is liquid-tightly fitted inside the seal cylinder.

Description

Technical Field

[0001] The present invention relates to a foam discharge container and a method for manufacturing the same.

Background Art

[0002] For example, as shown in Patent Document 1 below, a foam discharge container is known that includes: a container main body having a storage portion that stores a content liquid and at least a part of which is elastically deformable, and a mouth portion extending upward from an upper end portion of the storage portion; and a cap body attached to the mouth portion. The cap body is formed with a foam discharge hole for discharging a foam of the content liquid, the container main body has a communication passage that communicates the inside of the storage portion and the inside of the mouth portion, and the cap body is provided with a seal portion fitted into the upper end portion of the storage portion. In this foam discharge container, after the container main body storing the content liquid is shaken to foam the content liquid, when the storage portion is compressed and deformed (squeezed and deformed), the foam of the content liquid passes through the communication passage and is discharged from the foam discharge hole.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, the container main body is a so-called extrusion blow molded article formed by directly sandwiching a parison extruded from an extruder between molding dies and performing blow molding. When the parison is sandwiched between the molding dies, a connecting rib that partitions the storage portion and the communication passage is formed. At this time, due to the flow of the resin material molding the container main body, on the inner peripheral surface of the upper end portion of the storage portion, when viewed in the vertical direction, recessed grooves extending in the vertical direction are generated at the portion closest to the communication passage on the parting line and the portion farthest from the communication passage. Therefore, even when the sealing part was fitted inside the upper end of the housing, there was a problem in that it was difficult to seal the upper end opening of the housing.

[0005] The present invention provides a foam dispensing container and a method for manufacturing the same, which can seal the upper end opening of the storage section even if vertically extending grooves are formed on the inner circumferential surface of the upper end of the storage section during the extrusion blow molding of the container body. [Means for solving the problem]

[0006] A foam dispensing container according to one aspect of the present invention comprises a container body having a storage portion that contains a liquid and is at least partially elastically deformable, and a mouth portion that extends upward from the upper end of the storage portion, and a cap body fitted to the mouth portion, wherein the cap body has a foam dispensing hole formed therein for dispensing foam from the liquid content, the container body has a communication passage that connects the inside of the storage portion and the inside of the mouth portion, and a sealing cylinder provided in the mouth portion that extends upward from the upper opening edge of the storage portion, and is an extruded blow molded body with the sealing cylinder as an insert, the sealing cylinder is made of a material with a higher heat resistance temperature than the material that forms the parts of the container body other than the sealing cylinder, and the cap body is provided with a sealing portion that is liquid-tightly fitted into the sealing cylinder.

[0007] After shaking the foam dispensing container to foam the liquid contents inside the container, pressing and compressing (squeezing) the container pressurizes the inside, causing the foamed liquid contents to pass through the connecting passage and opening and be discharged from the foam dispensing hole. Since the sealing cylinder is made of a material with a higher heat resistance temperature than the material forming the parts of the container body other than the sealing cylinder, and the container body is an extruded blow-molded body with the sealing cylinder as an insert, even if vertically extending grooves are formed on the inner circumferential surface of the upper end of the housing section during the extruded blow molding of the container body, the dimensional accuracy of the inner circumferential surface of the sealing cylinder can be ensured around its entire circumference, and the upper end opening of the housing section can be reliably sealed by fitting the sealing section into the sealing cylinder. Since the container body is an extruded blow-molded product with a sealing cylinder as an insert, the sealing cylinder and the upper opening edge of the storage section can be easily and firmly fixed together.

[0008] A recess may be formed in either the upper opening edge of the housing portion or the lower opening edge of the sealing cylinder, and a protrusion that fills the recess may be formed in either the upper opening edge of the housing portion or the lower opening edge of the sealing cylinder.

[0009] A recess is formed on either the upper opening edge of the housing portion or the lower opening edge of the seal cylinder, and a convex portion that fills the recess is formed on either the upper opening edge of the housing portion or the lower opening edge of the seal cylinder. This allows the seal cylinder and the upper opening edge of the housing portion to be securely and firmly fixed together.

[0010] The mouth portion, the seal cylinder, and the upper end opening of the housing portion are arranged coaxially, and a communication space may be provided between the inner circumferential surface of the mouth portion and the outer circumferential surface of the seal cylinder, which extends continuously around the entire circumference along the central axis of the mouth portion and through which the upper end opening of the communication passage opens.

[0011] The mouth, sealing cylinder, and upper end opening of the housing are arranged coaxially, and a connecting space is provided between the inner circumferential surface of the mouth and the outer circumferential surface of the sealing cylinder, which extends continuously around the entire circumference along the central axis of the mouth and through which the upper end opening of the communication passage opens. Therefore, when attaching the cap body to the mouth, it is possible to fit the sealing part into the sealing cylinder and connect the foam discharge hole and the communication passage through the connecting space without having to align the relative circumferential positions of the cap body and the container body, thereby improving ease of assembly.

[0012] A method for manufacturing a foam dispensing container according to one aspect of the present invention comprises an extrusion blow molding step for forming the container body and a fitting step for attaching the cap body to the mouth, and a method for manufacturing a foam dispensing container according to one aspect of the present invention, wherein a recess is formed at the lower end opening edge of the seal cylinder and a convex portion filled in the recess is formed at the upper end opening edge of the housing portion, and the extrusion blow molding step involves, after sandwiching the parison extruded from the extruder between molding dies, fitting a plug having a pressurized air supply passage and having the seal cylinder set in it into the upper end opening of the parison to form the mouth portion and the upper end of the housing portion, and while introducing and filling the recess of the seal cylinder with the resin material of the parison to form the convex portion, pressurized air from the pressurized air supply passage is used to form the communication passage and the portion of the housing portion located below the upper end.

[0013] During the extrusion blow molding process, after the parison extruded from the extruder is sandwiched between molding dies, a plug having a pressurized air supply passage and a sealing cylinder set inside is fitted into the upper end opening of the parison, thereby forming the mouth and the upper end of the housing section. At the same time, the resin material of the parison is introduced into the recess of the sealing cylinder and filled to form a protrusion, while pressurized air from the pressurized air supply passage forms the connecting passage and the portion of the housing section located below the upper end. Thus, a container body in which the sealing cylinder and the upper end opening edge of the housing section are firmly fixed can be easily and reliably obtained. [Effects of the Invention]

[0014] According to one aspect of the present invention, even if vertically extending grooves are formed on the inner circumferential surface of the upper end of the storage section during the extrusion blow molding of the container body, the upper end opening of the storage section can be sealed. [Brief explanation of the drawing]

[0015] [Figure 1] This is a longitudinal cross-sectional view of the foam dispensing container shown as the first embodiment. [Figure 2] This is a cross-sectional view taken along the line II-II in Figure 1. [Figure 3] It is a cross-sectional view taken along the line III-III in Figure 1. [Figure 4] It is an explanatory view of the method for manufacturing the foam discharge container of Figure 1. [Figure 5] It is a vertical cross-sectional view of the foam discharge container shown as the second embodiment. [Modes for Carrying Out the Invention]

[0016] Hereinafter, the foam discharge container according to the first embodiment of the present invention will be described with reference to the drawings. As shown in Figure 1, the foam discharge container 1 according to the present embodiment includes a container body 10 having a mouth portion 11, and a cap body 20 attached to the mouth portion 11. The cap body 20 is formed in a toped cylindrical shape having a cap top wall 21a, and includes a body cylinder portion 21 attached to the mouth portion 11. The body cylinder portion 21 and the mouth portion 11 are disposed coaxially with a common axis.

[0017] Hereinafter, this common axis is referred to as the container axis O (central axis), the side of the cap top wall 21a along the container axis O is referred to as the upper side, the side of the bottom portion 12 of the container body 10 along the container axis O is referred to as the lower side, and the direction along the container axis O is referred to as the vertical direction. The direction intersecting the container axis O when viewed from the vertical direction is referred to as the radial direction, and the direction circulating around the container axis O when viewed from the vertical direction is referred to as the circumferential direction.

[0018] The container body 10 has a mouth portion 11, a storage portion 13, a bottom portion 12, a communication passage 14, and a seal cylinder 15. The mouth portion 11, the storage portion 13, and the bottom portion 12 are provided to be connected in this order from the upper side to the lower side. The mouth portion 11, the storage portion 13, the bottom portion 12, and the communication passage 14 are integrally formed of a synthetic resin material. Note that the communication passage 14 may be a separate body from the mouth portion 11, the storage portion 13, and the bottom portion 12. The container body 10 is an extrusion blow molded article using the seal cylinder 15 as an insert component.

[0019] A content liquid is stored in the storage portion 13. The storage portion 13 includes a body portion 13a that extends straight upward from the bottom portion 12, a shoulder portion 13b that extends radially inward as it goes upward from the upper end of the body portion 13a, and a neck portion (upper end portion) 13c that extends straight upward from the upper end of the shoulder portion 13b. At least the body portion 13a of the storage portion 13 is formed to be elastically deformable. As shown in Figure 2 and Figure 3, the storage portion 13 has a circular shape when viewed in the vertical direction. The inner side of the neck portion 13c, which is the upper end opening 13f of the storage portion 13, has a circular shape arranged coaxially with the container axis O when viewed in the vertical direction. The mouth portion 11 extends upward from the neck portion 13c.

[0020] The communication passage 14 is formed in a tubular shape extending downward from the lower end opening of the mouth portion 11 along the storage portion 13, and communicates the inside of the storage portion 13 with the inside of the mouth portion 11. The lower end opening 14a of the communication passage 14 is located above the bottom portion 12 and opens into the lower end portion of the storage portion 13. The upper end opening 14b of the communication passage 14 opens into the lower end portion of the mouth portion 11.

[0021] As shown in Figure 2, on the outer peripheral surfaces of the shoulder portion 13b and the body portion 13a located below the neck portion 13c in the storage portion 13, vertical grooves 13d that are recessed radially inward and extend in the vertical direction are formed. The portion of the communication passage 14 located at the same vertical position as the shoulder portion 13b and the body portion 13a is accommodated in the vertical groove 13d, and is connected to the storage portion 13 via a connecting rib 13e that protrudes radially outward from the radially inner end of the inner surface of the vertical groove 13d.

[0022] The upper end portion of the communication passage 14 located at the same vertical position as the neck portion 13c extends straight in the vertical direction. As shown in Figure 3, no vertical groove 13d is formed in the neck portion 13c, the connecting rib 13e protrudes radially outward from the outer peripheral surface of the neck portion 13c, and the upper end portion of the communication passage 14 is located radially outward of the outer peripheral surface of the neck portion 13c.

[0023] The sealing cylinder 15 is located inside the mouth portion 11 and extends upward from the upper opening edge of the neck portion 13c. The sealing cylinder 15 is made of a material (e.g., POM) with a higher heat resistance temperature than the materials that form the other parts of the container body 10, namely the mouth portion 11, the storage portion 13, the bottom portion 12, and the communication passage 14. The sealing cylinder 15 is arranged coaxially with the container axis O. A communication space 33 is provided between the outer circumferential surface of the sealing cylinder 15 and the inner circumferential surface of the mouth portion 11, extending continuously around the entire circumference and opening at the upper end opening 14b of the communication passage 14. The communication space 33 is formed in an annular shape and is arranged coaxially with the container axis O. The upper opening edge of the sealing cylinder 15 is located below the upper opening edge of the mouth portion 11.

[0024] A recess 16 is formed on either the lower end opening edge of the seal cylinder 15 or the upper end opening edge of the neck portion 13c, and a protrusion 17 that fills the recess 16 is formed on the other of the lower end opening edge of the seal cylinder 15 or the upper end opening edge of the neck portion 13c. The recess 16 and the protrusion 17 are each formed in a continuous strip shape extending around the entire circumference.

[0025] The cap body 20 comprises a main cylindrical portion 21, a lid portion 23, and an inner stopper portion 28.

[0026] The main cylindrical portion 21 is externally attached to the mouth portion 11. The main cylindrical portion 21 has a foam discharge hole 22 for discharging the foamed liquid contents. The foam discharge hole 22 is formed in the cap top wall 21a of the main cylindrical portion 21 and opens into the mouth portion 11. The central axis of the foam discharge hole 22 is radially separated from the container axis O. The foam discharge hole 22 communicates with the upper end opening 14b of the communication passage 14 through the mouth portion 11.

[0027] The lid 23 is connected to the main body cylindrical portion 21 via a hinge portion 25. The lid 23 is integrally formed with the main body cylindrical portion 21. The lid 23 opens and closes the foam discharge hole 22 by rotating vertically around the hinge portion 25. The hinge portion 25 is provided on the opposite side of the foam discharge hole 22, sandwiching the container axis O radially. Note that the hinge portion 25 and the lid 23 are not required.

[0028] A retaining portion 26 for holding the inner stopper portion 28 is provided on the main cylindrical portion 21. The retaining portion 26 is formed in a cylindrical shape extending downward from the top wall 21a of the cap and is arranged coaxially with the container axis O. The retaining portion 26 is fitted into the mouth portion 11 in a liquid-tight manner. A foam discharge hole 22 opens on the inside of the retaining portion 26. The lower end of the retaining portion 26 is located above the lower end of the inner circumferential surface of the mouth portion 11.

[0029] The main cylindrical portion 21 supports the inner stopper portion 28 from above. In this embodiment, a cylindrical support portion 27 is formed on the main cylindrical portion 21, extending downward from a portion of the cap top wall 21a that is located radially inward from the inner circumferential surface of the holding portion 26 and the foam discharge hole 22. The lower end of the support portion 27 is located above the lower end of the holding portion 26. The lower end opening edge of the support portion 27 abuts against the upper surface of the inner stopper top wall 28a via a porous body 35, which will be described later. The support portion 27 is arranged coaxially with the container axis O, but the central axis of the support portion 27 may be radially separated from the container axis O.

[0030] A foam discharge hole 22 is located in the portion of the main body cylindrical portion 21 between the outer circumferential surface of the support portion 27 and the inner circumferential surface of the holding portion 26 (hereinafter referred to as the connection space 31). The connection space 31 extends continuously around its entire circumference. The connection space 31 is formed in an annular shape and is arranged coaxially with the container axis O. Part of the partition wall of the connection space 31 is formed by the cap top wall 21a.

[0031] The inner plug portion 28 is formed in a topped cylindrical shape having an inner plug top wall 28a and an inner plug peripheral wall 28b. The inner plug portion 28 is separate from the main cylindrical portion 21 and the lid 23, but may be formed integrally with them.

[0032] The inner plug circumferential wall 28b is liquid-tightly fitted within the retaining portion 26. The upper surface of the inner plug top wall 28a is separated downward from the lower surface of the cap top wall 21a. The lower surface of the inner plug top wall 28a abuts against the upper end opening edge of the seal cylinder 15. A sealing portion 29 is formed on the top wall 28a of the inner stopper, which is liquid-tightly fitted inside the sealing cylinder 15. The sealing portion 29 is formed in a cylindrical shape that protrudes downward from the lower surface of the top wall 28a of the inner stopper and is arranged coaxially with the container axis O. The sealing portion 29 seals the upper end opening 13f of the housing portion 13. A connecting hole 34 is formed on the outer circumference of the top wall 28a of the central plug, penetrating vertically and opening into a communication space 33 and a connecting space 31, and communicating with the foam discharge hole 22 through the connecting space 31. Multiple connecting holes 34 are provided at intervals in the circumferential direction.

[0033] A porous body 35 is provided inside the opening 11, covering the connecting hole 34 and allowing the foam to pass through. The porous body 35 is a sheet-like mesh and is fixed to the upper surface of the top wall 28a of the inner plug. The porous body 35 is provided over the entire upper surface of the top wall 28a of the inner plug. The lower end opening edge of the support portion 27 abuts against the upper surface of the porous body 35. The porous body 35 may be, for example, a three-dimensional network structure, and may be attached only to the upper surface of the plug top wall 28a, specifically to the peripheral edge of the opening of the connecting hole 34. The porous body 35 may also be omitted.

[0034] Next, we will explain how to manufacture the foam dispensing container 1. The manufacturing method for the foam dispensing container 1 includes an extrusion blow molding step to form the container body 10 and a fitting step to attach the cap body 20 to the opening 11.

[0035] In the extrusion blow molding process, the container body 10 is extruded and blow molded using a pre-injected seal cylinder 15 as an insert. Specifically, the parison extruded from the extruder is directly sandwiched between the molding die M. At this time, a connecting rib 13e is formed that separates the housing section 13 from the connecting passage 14. Here, a seal cylinder 15 is pre-set in the plug P having a pressurized air supply passage p1, and pressurized air is blown downward from the pressurized air supply passage p1 to fit the plug P into the upper end opening of the parison as shown in Figure 4(a). At this time, the mouth portion 11 and the neck portion 13c of the housing portion 13 are formed, and the resin material of the parison enters and fills the recess 16 of the seal cylinder 15 to form a protrusion 17, while the communication passage 14, the portion of the housing portion 13 located below the neck portion 13c, and the bottom portion 12 are formed by the pressurized air from the pressurized air supply passage p1. Then, as shown in Figure 4(b), the plug P is separated upward from the molding die M, the molding die M is opened, and the container body 10 is demolded. From the above, the container body 10 is obtained. Furthermore, after fixing the porous body 35 to the upper surface of the top wall 28a of the inner plug, the circumferential wall 28b of the inner plug is fitted into the holding part 26 to assemble the cap body 20. Then, in the mounting process, the holding portion 26 is fitted into the opening portion 11, and the sealing portion 29 is fitted into the sealing cylinder 15, while the main cylinder portion 21 is fitted over the opening portion 11, thereby assembling the cap body 20 to the opening portion 11 of the container body 10. This gives rise to the foam dispensing container 1.

[0036] Next, the operation of the foam dispensing container 1 will be explained.

[0037] After shaking the foam dispensing container 1 to foam the liquid contents in the containment section 13, the lid 23 is rotated upward around the hinge section 25 to open the foam dispensing hole 22. Next, for example, with the mouth section 11 facing downward, the body section 13a of the containment section 13 is pressed and compressed (squeezed), which pressurizes the inside of the containment section 13, causing the foamed liquid contents to pass through the communication passage 14, the connecting space 33, the connecting hole 34, and the connecting space 31 in that order and be discharged from the foam dispensing hole 22. In this case, since the connecting hole 34 is covered by the porous body 35, the foam, whose foam quality has been adjusted by passing through the porous body 35, is discharged from the foam discharge hole 22. This makes it possible to stabilize the foam quality of the foam discharged from the foam discharge hole 22.

[0038] Subsequently, when the pressure on the housing section 13 is released and the housing section 13 is restored to its original shape, the pressure inside the housing section 13 decreases, and outside air flows into the opening 11 through the foam discharge hole 22. At this time, the foam located in the connecting space 31 further foams as it passes through the porous body 35 toward the downward side of the connecting passage 14. This reduces the number of times the foam discharge container 1 needs to be shaken when discharging the foam next time.

[0039] As described above, in the foam dispensing container 1 according to this embodiment, the seal cylinder 15 is made of a material with a higher heat resistance temperature than the material that forms the parts of the container body 10 other than the seal cylinder 15, and the container body 10 is an extruded blow molded body with the seal cylinder 15 as an insert. Therefore, even if a recessed portion 13g extending in the vertical direction, as shown in Figure 3, is formed on the inner circumferential surface of the neck portion 13c of the housing portion 13 during the extruded blow molding of the container body 10, the dimensional accuracy of the inner circumferential surface of the seal cylinder 15 can be ensured around its entire circumference, and the upper end opening 13f of the housing portion 13 can be reliably sealed by fitting the seal portion 29 into the seal cylinder 15. Since the container body 10 is an extruded blow-molded body with the sealing cylinder 15 as an insert, the sealing cylinder 15 and the upper opening edge of the neck portion 13c can be easily and firmly fixed together.

[0040] A recess 16 is formed on either the upper end opening edge of the neck portion 13c or the lower end opening edge of the seal cylinder 15, and a protrusion 17 that fills the recess 16 is formed on the other of the upper end opening edge of the neck portion 13c or the lower end opening edge of the seal cylinder 15, so that the seal cylinder 15 and the upper end opening edge of the neck portion 13c can be securely and firmly fixed together.

[0041] The mouth portion 11, the sealing cylinder 15, and the upper end opening of the neck portion 13c are arranged coaxially, and a communication space 33 is provided between the inner circumferential surface of the mouth portion 11 and the outer circumferential surface of the sealing cylinder 15, which extends continuously around the entire circumference and through which the upper end opening 14b of the communication passage 14 opens. Therefore, when attaching the cap body 20 to the mouth portion 11, it is possible to fit the sealing portion 29 into the sealing cylinder 15 and connect the foam discharge hole 22 and the communication passage 14 through the communication space 33 without having to align the relative circumferential positions of the cap body 20 and the container body 10, thereby improving ease of assembly.

[0042] According to the manufacturing method for a foam discharge container of this embodiment, during the extrusion blow molding process, after the parison extruded from the extruder is sandwiched in the molding die M, a plug P having a pressurized air supply passage p1 and a seal cylinder 15 set inside is fitted into the upper end opening of the parison as shown in Figure 4(a), thereby forming the mouth portion 11 and the neck portion 13c, and while the resin material of the parison is introduced and filled into the recess 16 of the seal cylinder 15 to form a protrusion 17, the communication passage 14, the portion of the housing portion 13 located below the neck portion 13c, and the bottom portion 12 are formed by pressurized air from the pressurized air supply passage p1, so that a container body 10 in which the seal cylinder 15 and the upper end opening edge of the neck portion 13c are firmly fixed can be easily and reliably obtained.

[0043] Next, a foam dispensing container 2 according to the second embodiment of the present invention will be described with reference to Figure 5. In this second embodiment, the same reference numerals are used for parts that are the same as those in the first embodiment, and their descriptions are omitted. Only the differences will be described.

[0044] In the foam dispensing container 2 of this embodiment, a fitting cylinder 15a is formed at the lower end of the sealing cylinder 15, protruding downward and airtightly fitted into the upper end opening 13f of the housing section 13. Multiple circumferential grooves 15b extending continuously along the entire length are formed on the outer circumferential surface of the fitting cylinder 15a at intervals in the vertical direction, and multiple protrusions 15c extending continuously along the entire length are formed on the inner circumferential surface of the neck section 13c at intervals in the vertical direction. Each circumferential groove 15b of the fitting cylinder 15a is filled with the protrusions 15c of the neck section 13c.

[0045] As described above, in the foam dispensing container 2 according to this embodiment, a fitting cylinder 15a is formed at the lower end of the sealing cylinder 15, which is airtightly fitted into the upper end opening 13f of the housing portion 13. Therefore, the sealing cylinder 15 can be securely and firmly fixed to the neck portion 13c.

[0046] Furthermore, the technical scope of the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.

[0047] For example, the cap body 20 does not need to have an inner stopper portion 28. In this case, the sealing portion 29 may be provided on the main body cylindrical portion 21.

[0048] Without departing from the spirit of the present invention, the components in the above embodiments may be replaced with well-known components as appropriate, and the above embodiments and modifications may be combined as appropriate. [Explanation of Symbols]

[0049] 1, 2 Foam dispensing container 10 Container body 11 Mouth 13. Detention Unit 13c Neck part (upper end) 13f top opening 14 Communication path 15 sealing tubes 16 recesses 17 Convex part 20 cap bodies 22 Foam discharge hole 29 Seal part 33 Communication Space O Container axis (center axis)

Claims

1. A container body having a storage section that contains the liquid and is at least partially elastically deformable, and a mouth section that extends upward from the upper end of the storage section, The system comprises a cap body attached to the opening, The cap body is formed with a foam dispensing hole for dispensing the foamed liquid contents. The container body is A connecting passage that connects the inside of the housing section and the inside of the opening section, The product comprises a seal cylinder provided within the opening portion and extending upward from the upper opening edge of the housing portion, and is an extruded blow-molded body with the seal cylinder as an insert. The sealing tube is made of a material with a higher heat resistance temperature than the material that forms the parts of the container body other than the sealing tube. A foam dispensing container, wherein the cap body is provided with a sealing portion that is liquid-tightly fitted inside the sealing cylinder.

2. A recess is formed in either the upper opening edge of the housing portion or the lower opening edge of the sealing cylinder. The foam dispensing container according to claim 1, wherein a convex portion filled in the recess is formed on either the upper end opening edge of the housing portion or the lower end opening edge of the sealing cylinder.

3. The mouth portion, the sealing cylinder, and the upper end opening of the housing portion are arranged coaxially. The foam dispensing container according to claim 1 or 2, wherein a communication space is provided between the inner circumferential surface of the mouth and the outer circumferential surface of the seal cylinder, extending continuously around the entire circumference along the central axis of the mouth, and having an upper end opening of the communication passage.

4. A method for manufacturing a foam dispensing container according to claim 1, comprising an extrusion blow molding step for forming the container body and a fitting step for attaching the cap body to the opening, A recess is formed at the lower end opening edge of the seal cylinder, and a protrusion is formed at the upper end opening edge of the housing portion, filling the recess. The aforementioned extrusion blow molding process is After the parison extruded from the extruder is sandwiched between the molding die, A method for manufacturing a foam dispensing container, comprising fitting a plug having a pressurized air supply passage and having the seal cylinder set inside the upper end opening of the parison to form the mouth and the upper end of the housing, and while introducing and filling the recess of the seal cylinder with the resin material of the parison to form the protrusion, pressurized air from the pressurized air supply passage forms the communication passage and the portion of the housing located below the upper end.

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