JP7016519B2 - Medical cap and its manufacturing method - Google Patents

Description

The present invention relates to a medical cap used for an infusion container, a blood collection tube, a drug container such as a vial, and a method for manufacturing the same. In particular, the present invention relates to a medical cap provided with an elastic plug that can be pierced by a needle for medical use, and a method for manufacturing the same.

At the mouth of a drug container such as a drug solution bottle used in the medical field or an infusion bottle for drip, the inside of an outer frame (for example, a thermoplastic synthetic resin, etc.) is placed so that the drug solution can be taken out with a needle. A medical cap provided with an elastic stopper (for example, rubber, a thermoplastic elastomer resin, etc.) is used (see, for example, Patent Documents 1 to 3 below).

Such a medical cap is attached by welding an outer frame body to the mouth of a drug container or the like. Then, at the time of use, an injection needle provided with a take-out tube is pierced into the elastic plug, the drug container is placed on the upper side, and the cap is placed on the lower side, so that the infusion solution in the container is placed through the take-out tube. Take out. Further, such a medical cap is required to be hermetically sealed in order to prevent leakage of chemicals and infusions and to prevent deterioration due to contact with air.

Further, for the production of the medical cap, for example, a two-color molding method or an insert molding method is used. In the case of the two-color molding method, after molding an elastic stopper using a common mold (lower mold) and an upper mold, the elastic stopper is left in the common mold and then with another upper mold. Combine to form the outer frame. In the case of this method, the elastic plug body is in close contact with the outer frame body in a heat-welded state on the contact surface.

Further, in the case of the insert molding method, the elastic stopper body prepared in advance by the injection molding method, the compression molding method, or the like is inserted into a pair of molds for molding the outer frame body, and then the outer frame body is molded. Even in the case of this method, the elastic plug body is in close contact with the outer frame body in a heat-welded state on the contact surface.

By the way, in the molding of the outer frame body provided with the flange portion, the outer frame body is left behind in the mold due to the warpage of the flange portion when the pair of molds are opened. Mold release failure may occur. As a result, there is a problem that the manufacturing efficiency of the medical cap is lowered.

Japanese Unexamined Patent Publication No. 2012-239529 Japanese Unexamined Patent Publication No. 2013-013585 Japanese Unexamined Patent Publication No. 2014-027980

The present invention has been made in view of the above-mentioned problems, and an object thereof is that when the mold is opened, the outer frame body is in close contact with the male mold (core) side, for example, and a mold release defect occurs. It is an object of the present invention to provide a medical cap and a method for producing the same, which can suppress the above-mentioned problems and prevent the production efficiency from being reduced.

In order to solve the above-mentioned problems, the medical cap according to the present invention enables the mouth portion to be closed by joining with the mouth portion of the container, and holds the elastic stopper body and the elastic stopper body inside. It is a medical cap having an outer frame body, and one side of the outer frame body can be joined to the mouth portion of the container, and is outward from the side peripheral surface of the outer frame body. An annular flange portion overhanging is provided, and at least one notch portion is provided on the outer peripheral surface of the flange portion.

In the above configuration, it is preferable that the notch portions are provided on the outer peripheral surface of the flange portion in a plurality of annular connections, or a plurality of annular portions are spaced apart from each other at an arbitrary distance.

In the above configuration, it is preferable that the notch portion is a groove portion in the vertical cross-sectional shape.

Further, in the above configuration, it is preferable that the groove surface on the joint side with the mouth portion of the container in the groove portion is a concave curved surface, and the groove surface on the opposite side to the joint side is an inclined surface. ..

Further, in the above configuration, the groove portion may have a substantially V-shaped shape, a substantially trapezoidal shape, or a substantially rectangular shape in the vertical cross-sectional shape.

Further, in the above configuration, the groove surface on the side opposite to the joint side may be a gentle slope as compared with the groove surface on the joint side with the mouth portion of the container in the groove portion.

Further, in the above configuration, the notch portion is an inclined cut surface in which a part of the outer peripheral surface of the flange portion is notched over the entire circumference, and the inclined cut surface is the mouth portion of the container. It may be provided on the joint side.

Further, in the method for manufacturing a medical cap according to the present invention, in order to solve the above-mentioned problems, the mouth portion of the container can be joined to close the mouth portion, and the elastic stopper body and the elastic stopper can be closed. A method for manufacturing a medical cap having an outer frame body for holding a body inside, wherein an engaging portion for forming at least one notch portion is provided on an outer peripheral surface of a flange portion of the outer frame body. Using a first mold provided with at least one and a second mold for forming a cavity for forming an outer frame by closing the mold with the first mold, the notch portion is formed on the outer periphery of the flange portion. This includes an outer frame body forming step of forming at least one outer frame body provided on the surface, and the first mold is opened when the first mold and the second mold are opened after the outer frame body is molded. The feature is that the engaging portion of the mold engages with the notch formed on the outer peripheral surface of the flange portion to lock the outer frame body to the first mold and temporarily fix it. do.

According to the present invention, the flange portion of the outer frame body includes at least one notch portion on the outer peripheral surface thereof. When molding the outer frame body, this notch portion can be engaged with a mold for molding the outer frame body. Therefore, for example, after molding the outer frame body, when the mold is opened, the notched portion of the molded outer frame body can be engaged with one of the molds and temporarily fixed. As a result, it is possible to prevent the outer frame body from coming into close contact with the other mold and causing a mold release defect. That is, according to the present invention, there is a medical cap and a manufacturing method thereof that can suppress the occurrence of mold release failure of the outer frame body when the mold is opened and prevent the manufacturing efficiency from being lowered. Can be provided.

FIG. 1A is a side view showing the medical cap according to the first embodiment of the present invention, and FIG. 1B is a schematic cross-sectional view of the medical cap. FIG. 2A is a plan view showing the medical cap, and FIG. 2B is a bottom view showing the medical cap. It is a partially enlarged view which shows the notch part in the flange part of the medical cap. FIG. 4A is a schematic cross-sectional view for explaining the method for manufacturing the medical cap, and FIG. 4A shows a state in which a pair of molds are closed to form a cavity for forming an upper frame portion. 4 (b) shows a state in which the mold is opened after the upper frame portion is molded, and FIG. 4 (c) shows a state in which an elastic plug is inserted into the upper frame portion. FIG. 5A is a schematic cross-sectional view for explaining a method for manufacturing the medical cap, showing a state in which a pair of molds are closed and a cavity for molding a lower frame portion is formed. FIG. 5 (b) shows a state in which the mold is opened after the lower frame portion is molded, and FIG. 5 (c) shows a medical cap after molding. It is a partially enlarged sectional view showing the engaging part provided in one mold used for molding the outer frame body of the medical cap. FIG. 7A shows a case where the vertical cross-sectional shape of the other groove portion in the medical cap is substantially V-shaped, and FIG. 7B shows a case where one groove surface is in the vertical cross-sectional view. It represents a case where it is a gentle slope and the other groove surface is a vertical plane, FIG. 7 (c) shows a case where it has a substantially trapezoidal shape in a vertical cross-sectional view, and FIG. 7 (d) shows a case where it has a substantially trapezoidal shape in a vertical cross-sectional view. It represents a case where it has a substantially rectangular shape. FIG. 8A is a side view showing the medical cap according to the second embodiment, and FIG. 8B is a schematic cross-sectional view of the medical cap. 9 (a) is a plan view showing the medical cap, and FIG. 9 (b) is a bottom view showing the medical cap. It is a partially enlarged view which shows the notch part in the flange part of the medical cap. It is a partially enlarged sectional view showing the engaging part provided in one mold used for molding the outer frame body of the medical cap. FIG. 12A is a side view showing the medical cap according to the third embodiment of the present invention, and FIG. 12B is a schematic cross-sectional view of the medical cap. 13 (a) is a plan view showing the medical cap, and FIG. 13 (b) is a bottom view showing the medical cap. FIG. 14A is a schematic cross-sectional view for explaining the method for manufacturing the medical cap, showing a state in which a pair of molds are closed and a cavity for molding an upper frame portion is formed. 14 (b) shows how the mold is opened after the upper frame portion is molded, and FIG. 14 (c) shows how the elastic plug is inserted into the upper frame portion. FIG. 15A is a schematic cross-sectional view for explaining a method for manufacturing the medical cap, showing a state in which a pair of molds are closed and a cavity for molding a lower frame portion is formed. FIG. 15B shows how the mold is opened after the lower frame portion is molded, and FIG. 15C shows the medical cap after molding. FIG. 3 is a partially enlarged cross-sectional view showing an engaging portion provided inside the first mold used for molding the upper frame portion of the medical cap. FIG. 17A is a side view showing the medical cap according to the fourth embodiment, and FIG. 17B is a schematic cross-sectional view of the medical cap. FIG. 18A is a plan view showing the medical cap, and FIG. 18B is a bottom view showing the medical cap. FIG. 19A is a schematic cross-sectional view for explaining the method for manufacturing the medical cap, FIG. 19A shows a state in which an elastic stopper is inserted into a first mold, and FIG. 19B shows a pair. The mold is closed and the cavity for forming the outer frame is formed, and FIG. 19 (c) shows how the outer frame is formed. FIG. 20A is a schematic cross-sectional view for explaining the method for manufacturing the medical cap, FIG. 20A shows a state in which a mold is opened after the outer frame body is molded, and FIG. 20B shows a state in which the mold is opened. Represents a medical cap after molding.

(Embodiment 1)
[Medical cap]
The medical cap according to the first embodiment of the present invention will be described below with reference to FIGS. 1 to 3. However, parts unnecessary for the explanation are omitted, and some parts are shown in an enlarged or reduced size for the sake of ease of explanation.

FIG. 1A is a side view showing the medical cap according to the first embodiment, and FIG. 1B is a schematic cross-sectional view of the medical cap. FIG. 2A is a plan view showing the medical cap, and FIG. 2B is a bottom view showing the elastic plug body. FIG. 3 is a partially enlarged view showing a notch portion in the flange portion of the medical cap. In FIG. 1B, the XYZ orthogonal coordinate axes are appropriately displayed in order to clarify the directional relationship of the illustrated ones. That is, the XY plane represents a horizontal plane, and the ten-Z direction represents a vertically upward direction.

As shown in FIGS. 1 (a), 1 (b), 2 (a) and 2 (b), the medical cap 10 of the present embodiment holds the elastic plug 11 and the elastic plug 11 inside. It has at least an outer frame body 12 to be used. The elastic plug 11 has a substantially cylindrical shape as a whole. However, the present invention is not limited to this, and may be, for example, a substantially truncated cone shape. Further, the outer frame body 12 includes an upper frame portion 12a that holds the elastic plug 11 on the inner wall from the top surface portion 111 side, and a lower frame portion 12b that holds the elastic plug 11 on the inner wall from the bottom surface portion 112 side. ..

The elastic plug 11 is housed inside the outer frame 12 with the top surface portion 111 on the upper side (+ Z direction in FIG. 1B) and the bottom surface portion 112 on the lower side. The top surface portion 111 has a needle stick surface 111b except for the peripheral portion 111a thereof. Further, the peripheral edge portion 111a of the top surface portion 111 is provided with an annular ridge portion 111c that enables engagement with the overhanging portion 120 in the upper frame portion 12a of the outer frame body 12. This makes it possible to prevent the elastic plug 11 from detaching from the upper frame portion 12a on the top surface portion 111 side. Further, the needle puncture surface 111b may be provided with at least one recess (not shown) that serves as a position index when puncturing with a puncture needle. The "needle puncture surface" is an elastic plug body 11, in which a medical cap 10 is attached to a drug solution bottle, an infusion bottle used for infusion, or the like, and when the drug solution or the like is taken out, needle puncture is performed by a puncture needle. It refers to the surface to be struck.

The bottom surface portion 112 has a wetted surface 112b except for the peripheral portion 112a. Further, a step is provided on the peripheral edge portion 112a of the bottom surface portion 112, and heat welding is performed on the peripheral edge portion 112a at the contact surface in contact with the lower frame portion 12b of the outer frame body 12. As a result, it is possible to prevent the elastic plug 11 from falling off from the outer frame 12, and to prevent the generation of voids due to the misalignment between the elastic plug 11 and the outer frame 12 during needle sticking. As a result, it is possible to improve the airtightness, prevent leakage of chemicals and infusions, and prevent deterioration due to contact with air. The “liquid contact surface” means a surface that the medical liquid or the like comes into contact with when the medical cap 10 is attached to the chemical liquid bottle, the chemical liquid bottle used for infusion, or the like. Further, as described later, "heat welding" means that the elastic plug 11 and the upper frame portion 12a in contact with the lower frame portion 12b due to the heat of the molten resin injected when the lower frame portion 12b is molded by injection molding or the like. As a result of melting the surface, after the lower frame portion 12b is molded, the lower frame portion 12b and the elastic stopper 11 and the lower frame portion 12b and the upper frame portion 12a are bonded to each other on their contact surfaces. It means that there is.

Examples of the material used for the elastic stopper 11 include rubber and a thermoplastic elastomer resin. The rubber is not particularly limited, and examples thereof include natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, and isoprene-isoprene rubber. The thermoplastic elastomer resin is not particularly limited, and examples thereof include olefin-based, styrene-based, polyurethane-based, polyester-based, polyvinyl chloride-based, polybutadiene-based, polyamide-based, and polyurethane-based resins. Of these, thermoplastic elastomers (SEBS, SEPS, HSBR, SEBR, CEBC) obtained by hydrogenating a conjugated diene-based thermoplastic elastomer are preferable. These thermoplastic elastomer resins can be used alone or in combination of two or more.

The thermoplastic elastomer resin is an extremely hygienic material as compared with the rubber material, but depending on the chemical solution used, the bottom surface 112 of the elastic plug 11 may be laminated. For the laminating process, the same type of resin as the outer frame body 12 or the container body to be attached is generally used. As a result, the bottom surface 112 of the elastic stopper 11 can be made of a material having the same or similar properties as the inside of the container with which the chemical solution comes into contact.

The characteristics of the elastic plug 11 are not particularly limited, and may be sufficient as long as it has a hardness enough to allow a medical injection needle or the like to penetrate. Further, it is preferable that the shape retainability is such that it is not easily deformed or damaged during normal storage. The hardness of the elastic plug 11 is preferably A5 to A50, more preferably A10 to A45 in the measurement by the JIS K6253 method.

As described above, the outer frame body 12 is composed of an upper frame portion 12a and a lower frame portion 12b. The contact surfaces of the upper frame portion 12a and the lower frame portion 12b are heat-welded, thereby forming an integral structure.

The material constituting the outer frame body 12 (that is, the upper frame portion 12a and the lower frame portion 12b) is not particularly limited, and any synthetic resin having established safety for medical use is sufficient. Of these, it is common to use a thermoplastic resin. Specifically, resins conventionally used for medical applications such as polyethylene, polypropylene, and polyethylene terephthalate (PET) resin are preferable, but the resin is not limited thereto. In the case of the pull-top type, for example, a thermoplastic elastomer is preferable as the material constituting the upper frame portion 12a. More specifically, examples thereof include olefin-based, styrene-based, polyurethane-based, polyester-based, polyvinyl chloride-based, and polybutadiene-based, but the present invention is not limited thereto. Further, any component such as a colorant may be added to the outer frame body 12.

The upper frame portion 12a is in contact with the peripheral edge portion 111a and the side peripheral surface 113 of the top surface portion 111 of the elastic plug 11, and is in a non-heat welded state at these contact portions. Further, the lower frame portion 12b is in contact with the peripheral edge portion 112a of the bottom surface portion 112 of the elastic plug body 11, and is in a heat welded state at this contact portion.

The lower frame portion 12b is provided with a flange portion 121 that projects outward from the lower frame portion 12b and enables joining with the mouth portion of a drug container or the like. As shown in FIG. 3, an annular groove portion 123 is provided on the outer peripheral surface 122 of the flange portion 121. Thereby, for example, after molding the lower frame portion 12b, when the mold is opened, the molded lower frame portion 12b can be engaged with the mold and temporarily fixed.

The annular groove portion 123 is configured by connecting a plurality of notched portions. More specifically, the groove portion 123 has a concave curved surface on the groove surface 123b on the joint side with the mouth portion of the container in the vertical cross-sectional shape, and has an inclined surface on the groove surface 123a on the opposite side to the joint side. (See Fig. 3). The concave curved surface of the groove surface 123b has the hypotenuse (inclined surface) of the groove surface 123a as the radius of curvature. By forming the groove surface 123b on the joint side with the mouth of the container into a concave curved surface in this way, the force with which the molded lower frame portion 12b is engaged with the mold can be increased, and the outside can be increased. It is possible to further suppress the occurrence of mold release defects such as the frame body 12 coming into close contact with the male mold (core) side. On the other hand, by making the groove surface 123a on the side opposite to the joint side with the mouth portion an inclined surface, the molded lower frame portion 12b can be opened from the male mold (core) side when the mold is opened. It can be easily released. The "vertical cross-sectional shape" of the flange portion 121 means a cross-sectional shape that passes through the center of the flange portion 121 and is cut along a surface including the normal of the lower surface 124 of the flange portion 121. Further, as shown in FIG. 3, the joint side with the mouth portion of the container means the lower surface 124 side of the flange portion 121, and the side opposite to the joint side means the upper surface 125 side of the flange portion 121.

The width w in the vertical cross-sectional shape of the annular groove portion 123 and the maximum depth d of the groove portion 123 are not particularly limited, but at least the molded lower frame portion 12b is engaged with the mold and temporarily fixed. It is preferable that the size is such that it can be used.

The maximum depth d of the groove portion 123 can be adjusted by changing the radius of curvature R and the central angle θ of the groove surface 123b. The central angle θ means an angle when the position where the inclination of the groove surface 123a on the outer peripheral surface 122 starts is centered in the vertical cross-sectional view of the groove portion 123. The height position of the groove portion 123 from the lower surface 124 (height h in FIG. 3) is not particularly limited as long as it is separated from the upper surface 125 and the lower surface 124 by an arbitrary distance. The thickness T of the flange portion 121 is not particularly limited, and can be appropriately set as needed.

The shape of the groove portion 123 is preferably substantially uniform over the entire circumference of the flange portion 121. Therefore, it is preferable that the width w, the maximum depth d, and the height position h of the groove portion 123 have the same values over the entire circumference.

In the present embodiment, the parting line PL preferably coincides with the lower surface 124 of the flange portion 121. When the parting line PL is above the groove portion 123 (on the upper surface 125 side shown in FIG. 3), the split position of the pair of molds is located above the groove portion 123, and the groove portion 123 is engaged with the mold. This is because it becomes difficult to match. As will be described later, the parting line PL is formed corresponding to the joint surface (or division position) of the pair of molds for forming the lower frame portion 12b.

The medical cap 10 of the present embodiment can be applied to a drug container such as an infusion container, for example. Examples of the mouth portion of the drug container have a substantially cylindrical shape as a whole and have an annular collar on the outer peripheral surface. When the medical cap 10 is attached to the mouth portion, the flange portion 121 for joining the outer frame body 12 and the annular flange of the mouth portion are joined by a method such as ultrasonic welding or heat welding. The constituent material of the mouth portion is not particularly limited, and for example, the same constituent material as that of the outer frame body 12 can be adopted.

[Manufacturing method of medical cap]
Next, a method for manufacturing the medical cap according to the present embodiment will be described with reference to FIGS. 4 to 6.
FIG. 4 is a schematic cross-sectional view for explaining a method for manufacturing a medical cap, and FIG. 4A shows a state in which a pair of molds are closed and a cavity for molding an upper frame portion is formed. FIG. 3B shows a state in which the mold is opened after the upper frame portion is molded, and FIG. 3C shows a state in which an elastic plug is inserted into the upper frame portion. Further, FIG. 5 is a schematic cross-sectional view for explaining a method for manufacturing a medical cap, and in FIG. 5A, a pair of molds are closed and a cavity for molding a lower frame portion is formed. The figure (b) shows the state of opening the mold after the lower frame portion is molded, and the figure (c) shows the state of the medical cap after molding. FIG. 6 is a partially enlarged cross-sectional view showing an engaging portion provided inside the first mold used for molding the lower frame portion.

The method for manufacturing a medical cap according to the present embodiment includes at least an outer frame body forming step of forming an outer frame body 12 that holds the elastic stopper 11 inside. More specifically, the outer frame body forming step includes a step of forming the upper frame portion 12a, a step of inserting the elastic stopper 11 inside the upper frame portion 12a, and a step of forming the lower frame portion 12b. .. Further, in the present embodiment, a step of manufacturing an elastic plug may be included.

The molding step of the upper frame portion 12a is first performed by injection molding using the first mold 131 and the second mold 132 as shown in FIG. 4 (a). The first mold 131 is a cavity (female mold, fixed side mold or lower mold), and the second mold 132 is a core (male mold, movable side mold or upper mold). The first mold 131 and the second mold 132 have a structure in which a cavity 133 capable of forming the upper frame portion 12a is formed when both are closed.

As shown in FIG. 6, the first mold 131 has an engaging portion 136 for forming the groove portion 123 in the flange portion 121 of the lower frame portion 12b (details of the engaging portion 136 will be described later). do.). However, since the groove portion 123 is not formed in the upper frame portion 12a, the cavity 133 is not formed in a state including the engaging portion 136 when the first mold 131 and the second mold 132 are closed. .. Further, the engaging portion 136 does not abut on the inner wall surface of the second mold 132 to form a joint surface with the second mold 132. Apart from the cavity 133, a space portion 137 having a size such that the engaging portion 136 does not abut on the inner wall surface of the second mold 132 is formed. This prevents the engaging portion 136 from obstructing the mold closing and mold opening of the first mold 131 and the second mold 132, and enables smooth molding of the upper frame portion 12a. In addition, it is possible to prevent the engaging portion 136 from being scratched or the like.

The upper frame portion 12a is molded by injecting a molten resin obtained by melting the resin that is a constituent material of the upper frame portion 12a into the cavity 133 for molding the upper frame portion 12a. The injection pressure of the molten resin is not particularly limited and may be appropriately set as needed. The injected molten resin is cooled in the cavity 133 for molding the upper frame portion 12a. The cooling time is not particularly limited and may be set as needed. The molten resin is not injected into the space portion 137 when the upper frame portion 12a is molded.

Subsequently, as shown in FIG. 4B, the first mold 131 and the second mold 132 are opened, whereby the upper frame portion 12a can be formed.

Next, as shown in FIG. 4C, with the upper frame portion 12a fixed in the first mold 131, the elastic stopper 11 prepared in advance is inserted into the upper frame portion 12a. do. The elastic plug 11 is inserted so that the top surface portion 111 is on the upper frame portion 12a side (lower side in FIG. 4C). The step of manufacturing the elastic stopper 11 can be carried out by a conventionally known molding method such as injection molding or compression molding.

Subsequently, as shown in FIG. 5A, a molding step of the lower frame portion 12b is performed. This step is performed in a state where the upper frame portion 12a is placed in the first mold 131 and the elastic plug 11 is further inserted in the upper frame portion 12a. Further, in this step, a first mold 131 and a third mold 134 capable of forming a cavity 135 for forming the lower frame portion 12b by closing the mold 131 with the first mold 131 are used. Do it. Therefore, the first mold 131 functions as a common mold that can also be applied to the molding of the lower frame portion 12b.

Here, the engaging portion 136 provided in the first mold 131 is composed of an annular ridge portion corresponding to the shape of the groove portion 123 to be molded. Further, the engaging portion 136 is provided in an annular shape on the inner wall surface of the first mold 131 corresponding to the position where the groove portion 123 is formed on the outer peripheral surface 122 of the flange portion 121. This makes it possible to form an annular groove portion 123 on the outer peripheral surface 122 of the flange portion 121.

In the molding step of the lower frame portion 12b, the molten resin obtained by melting the resin which is the constituent material of the lower frame portion 12b is melted in the state where the elastic plug 11 is housed inside, and the cavity 135 for molding the lower frame portion 12b is used. It is done by injecting inside. The injection pressure of the molten resin is not particularly limited and may be appropriately set as needed. The injected molten resin is cooled in a closed state. The cooling time is not particularly limited and may be set as needed.

Next, as shown in FIG. 5B, the first mold 131 and the third mold 134 are opened. At this time, the lower frame portion 12b is temporarily fixed to the first mold 131 by engaging the groove portion 123 with the engaging portion 136 of the first mold 131. As a result, even if the flange portion 121 is warped, the lower frame portion 12b is brought into close contact with the third mold 134 and released when the first mold 131 and the third mold 134 are opened. It is possible to prevent the occurrence of mold failure. As a result, it is possible to prevent a decrease in manufacturing efficiency.

After opening the molds of the first mold 131 and the third mold 134, as shown in FIG. 5C, an outer frame body 12 holding the elastic plug 11 inside is obtained. The upper frame portion 12a and the lower frame portion 12b are heat-welded at their contact surfaces. Further, the elastic plug 11 is heat-welded on the contact surface with the lower frame portion 12b, while it is not heat-welded on the contact surface with the upper frame portion 12a.

From the above, the medical cap 10 according to the present embodiment can be manufactured. According to the method for manufacturing the medical cap 10 of the present embodiment, in the molding process of the lower frame portion 12b, the groove portion 123 is formed in the lower frame portion 12b by using the first mold 131 having the engaging portion 136. The first mold 131 and the third mold 134 are opened in a state where the groove portion 123 is engaged with the engaging portion 136 of the first mold 131 and temporarily fixed. Therefore, it is possible to prevent the lower frame portion 12b from being left behind in the third mold 134, which is a cavity. As a result, it is possible to provide a method for manufacturing a medical cap in which a decrease in manufacturing efficiency is suppressed.

[Other matters]
In the present embodiment, an embodiment in which an annular groove portion 123 is provided as a notch portion on the outer peripheral surface 122 of the lower frame portion 12b of the outer frame body 12 will be described as an example. However, the present invention is not limited to this aspect, and can be appropriately modified into notches having various shapes.

For example, as shown in FIG. 7A, the notch portion may be provided with a groove portion 141 having a substantially V-shaped vertical cross-sectional shape in an annular shape. In this case, in the vertical cross-sectional shape of the groove portion 141, the groove surface 141a on the upper side (upper surface 125 side) is inclined at an arbitrary angle so as to be substantially symmetrical with the groove surface 141b on the lower side (lower surface 124 side). ing. Even in such a form, the groove portion 141 of the lower frame portion 12b can be engaged with the engaging portion of the first mold 131, and the lower frame portion 12b is in close contact with the third mold 134. It is possible to prevent the occurrence of mold release defects.

Further, as shown in FIG. 7B, the notched portion has a groove surface 142a on the upper side (upper surface 125 side) as an inclined surface and a lower side (lower surface 124 side) in the vertical cross-sectional shape. The groove portion 142b may be a groove portion 142 whose groove surface 142b is perpendicular to the outer peripheral surface 122. With the groove portion 142 having such a shape, when the first mold 131 and the third mold 134 are opened, the effect of locking with the locking portion on the groove surface 142b of the groove portion 142 is enhanced. be able to. As a result, it is possible to further prevent the lower frame portion 12b from coming into close contact with the third mold 134 and causing a mold release defect.

Further, the notch portion may be a substantially trapezoidal groove portion 143 shown in FIG. 7 (c) or a substantially rectangular groove portion 144 shown in FIG. 7 (d). Even in these forms, the groove portion 143 of the lower frame portion 12b can be engaged with the engaging portion of the first mold 131, and the lower frame portion 12b is brought into close contact with the third mold 134 and released. It is possible to prevent the occurrence of mold failure.

Further, for example, a notch portion having the same vertical cross-sectional shape as that of the first embodiment may be provided in an annular shape on the outer peripheral surface 122 of the flange portion 121 in a state of being separated by an arbitrary distance.

(Embodiment 2)
The medical cap according to the second embodiment of the present invention and a method for manufacturing the same will be described below.
The second embodiment is different from the first embodiment in that the notch provided on the outer peripheral surface of the lower frame portion is an oblique cut surface over the entire circumference. Even in such a form, in the present embodiment, it is possible to provide a medical cap and a method for manufacturing the same, in which a decrease in manufacturing efficiency is suppressed.

[Medical cap]
The medical cap according to the second embodiment will be described below with reference to FIGS. 8 to 10. The components having the same functions as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. FIG. 8A is a side view showing the medical cap according to the second embodiment, and FIG. 8B is a schematic cross-sectional view of the medical cap. 9 (a) is a plan view showing the medical cap, and FIG. 9 (b) is a bottom view showing the elastic plug. FIG. 10 is a partially enlarged view showing a notch portion in the flange portion of the medical cap.

As shown in FIGS. 8 (a), 8 (b), 9 (a) and 9 (b), the medical cap 20 of the present embodiment holds the elastic plug 11 and the elastic plug 11 inside. It has at least an outer frame body 21 to be used.

The outer frame body 21 includes an upper frame portion 21a that holds the elastic plug 11 on the inner wall from the top surface portion 111 side, and a lower frame portion 21b that holds the elastic plug 11 on the inner wall from the bottom surface portion 112 side. The material constituting the outer frame body 21 (that is, the upper frame portion 21a and the lower frame portion 21b) is not particularly limited, and the same material as that of the outer frame body 12 of the first embodiment can be used.

The upper frame portion 21a is in contact with the peripheral edge portion 111a and the side peripheral surface 113 of the top surface portion 111 of the elastic plug 11, and is in a non-heat welded state at these contact portions. Further, the lower frame portion 21b is in contact with the peripheral edge portion 112a of the bottom surface portion 112 of the elastic plug body 11, and is in a heat welded state at this contact portion.

The lower frame portion 21b is provided with a flange portion 211 that enables bonding with the mouth portion of a drug container or the like. As shown in FIGS. 8 and 10, the outer peripheral surface 122 of the flange portion 211 is provided with an oblique cut surface 212 having a notch over the entire circumference. The oblique cut surface 212 is provided on the joint side (that is, the lower surface 124 side) with the mouth portion of the container. Thereby, for example, after molding the lower frame portion 21b, when the mold is opened, the molded lower frame portion 21b can be engaged with the mold and temporarily fixed.

The oblique cut surface 212 is provided so as to cut out a peripheral edge portion on the lower surface 124 side of the flange portion 211. Here, the height h of the oblique cut surface 212 shown in FIG. 10 is not particularly limited, but it is preferable that the height h is separated from the upper surface 125 by a certain distance. As a result, the molded lower frame portion 21b can be reliably temporarily fixed to the mold. Further, the depth d of the oblique cut surface 212 shown in FIG. 10 is not particularly limited, and can be appropriately set as needed. However, by increasing the depth d, the force with which the molded lower frame portion 21b engages with the mold can be increased, and the outer frame body 21 is brought into close contact with the male mold (core) side. It is possible to further suppress the occurrence of mold release defects.

It is preferable that the oblique cut surface 212 is provided in a substantially uniform shape over the entire circumference of the flange portion 211. Therefore, it is preferable that the height h and the depth d of the oblique cut surface 212 have the same values over the entire circumference.

In the present embodiment, the parting line PL preferably coincides with the lower surface 124 of the flange portion 211. When the parting line PL is above the height h of the oblique cut surface 212 (on the upper surface 125 side shown in FIG. 10), the split position of the pair of molds is located above the groove portion 123, and the groove portion 123. This is because it becomes difficult to engage the mold with the mold. As will be described later, the parting line PL is formed corresponding to the joint surface (or division position) of the pair of molds for forming the lower frame portion 21b.

[Manufacturing method of medical cap]
Next, a method for manufacturing the medical cap according to the second embodiment will be described below with reference to FIG. 11. FIG. 11 is a partially enlarged cross-sectional view showing an engaging portion provided inside the first mold used for molding the lower frame portion.

In the method for manufacturing a medical cap according to the present embodiment, as compared with the first embodiment, the first metal has an engaging portion capable of forming the oblique cut surface 212 on the flange portion 211 of the lower frame portion 12b. The point provided in the mold is different. Other than that, since the medical cap can be manufactured by the same method as in the first embodiment, the detailed description thereof will be omitted.

The first mold 231 has an inner surface shape capable of forming the upper frame portion 21a by closing the mold with the second mold 132. Further, as shown in FIG. 11, the first mold 231 has an engaging portion 232 capable of forming the oblique cut surface 212 on the outer peripheral surface 122 of the flange portion 211 of the lower frame portion 21b. .. The engaging portion 232 provided on the first mold 231 has an opening direction of the first mold 231 (indicated by an arrow in FIG. 11) on the annular inner wall surface 233 which can form the outer peripheral surface 122 of the flange portion 211. It is provided so as to be inclined so that the opening portion shrinks toward the indicated direction P). This makes it possible to form an annular oblique cut surface 212 on the outer peripheral surface 122 of the flange portion 211.

When the first mold 231 and the second mold 132 are closed, the cavity 133 is not formed in a state including the engaging portion 232. Further, the engaging portion 232 does not abut on the inner wall surface of the second mold 132 to form a joint surface with the second mold 132. Apart from the cavity, a space portion having a size such that the engaging portion 232 does not come into contact with the inner wall surface of the second mold 132 is formed. This prevents the engaging portion 232 from obstructing the mold closing and mold opening of the first mold 231 and the second mold 132, and enables smooth molding of the upper frame portion 21a. Further, it is possible to prevent the engaging portion 232 from being scratched or the like. Further, the molten resin is not injected into this space portion when the upper frame portion 21a is molded.

Further, the first mold 231 also has an inner surface shape capable of forming the lower frame portion 21b by closing the mold with the third mold 134. In the molding step of the lower frame portion 21b, the molten resin obtained by melting the resin which is the constituent material of the lower frame portion 21b is melted in the state where the elastic plug 11 is housed inside, and the cavity 135 for molding the lower frame portion 21b is used. It is done by injecting inside. After cooling the molten resin, when the first mold 231 and the third mold 134 are opened, the lower frame portion 21b is the first by engaging the inclined cut surface 212 with the engaging portion 232. Temporarily fixed to the mold 231. As a result, in the present embodiment, when the first mold 231 and the third mold 134 are opened, the lower frame portion 21b is in close contact with the third mold 134, resulting in mold release failure. It can be prevented from occurring. As a result, it is possible to prevent a decrease in manufacturing efficiency.

As described above, the medical cap 20 according to the present embodiment can be manufactured. According to the method for manufacturing the medical cap 20 of the present embodiment, in the molding process of the lower frame portion 21b, an oblique cut surface is formed on the lower frame portion 21b by using the first mold 231 having the engaging portion 232. The first mold 231 and the third mold 134 are opened in a state where the 212 is formed and the oblique cut surface 212 is engaged with the engaging portion 232 of the first mold 231 and temporarily fixed. Therefore, it is possible to prevent the lower frame portion 21b from being left behind in the third mold 134, which is a cavity. As a result, it is possible to provide a method for manufacturing a medical cap in which a decrease in manufacturing efficiency is suppressed.

[Other matters]
In the present embodiment, an embodiment in which an oblique cut surface as a notch portion is provided over the entire circumference of the outer peripheral surface of the flange portion as the lower frame portion has been described as an example. However, the present invention is not limited to this aspect, and may be, for example, an embodiment in which a plurality of oblique cut surfaces are provided in an annular shape at arbitrary distances. In this case, even in the first mold, the engaging portion is an annular inner wall surface that can form the outer peripheral surface of the flange portion, and opens in the opening direction of the first mold (see FIG. 11). Inclined surfaces that are inclined so that the portions are reduced are provided at arbitrary distances.

(Embodiment 3)
The medical cap according to the third embodiment of the present invention and a method for manufacturing the same will be described below.
The third embodiment is different from the first embodiment in that a flange portion having a groove portion is provided on the upper frame portion of the outer frame body. Further, the molds used in the outer frame body forming process are also different.

[Medical cap]
The medical cap according to the third embodiment will be described below with reference to FIGS. 12 and 13. The components having the same functions as those of the first and second embodiments are designated by the same reference numerals and detailed description thereof will be omitted. FIG. 12A is a side view showing the medical cap according to the third embodiment, and FIG. 12B is a schematic cross-sectional view of the medical cap. 13 (a) is a plan view showing the medical cap, and FIG. 13 (b) is a bottom view showing the medical cap.

As shown in FIGS. 12 (a), 12 (b), 13 (a) and 13 (b), the medical cap 30 of the present embodiment holds the elastic plug 11 and the elastic plug 11 inside. It has at least an outer frame body 31 to be used.

The outer frame body 31 includes an upper frame portion 31a that holds the elastic plug 11 on the inner wall from the top surface portion 111 side, and a lower frame portion 31b that holds the elastic plug 11 on the inner wall from the bottom surface portion 112 side. The contact surfaces of the upper frame portion 31a and the lower frame portion 31b are heat-welded, thereby forming an integral structure. The material constituting the outer frame 31 (that is, the upper frame 31a and the lower frame 31b) is not particularly limited, and the same material as that of the outer frame 12 of the first embodiment can be used.

The upper frame portion 31a is provided with a flange portion 311 that enables joining with the mouth portion of a drug container or the like. An annular groove portion 123 is provided on the outer peripheral surface 313 of the flange portion 311 (see FIG. 3). Thereby, for example, after molding the upper frame portion 31a, when the mold is opened, the molded upper frame portion 31a can be engaged with the mold and temporarily fixed temporarily.

The upper frame portion 31a is in contact with the peripheral edge portion 111a and the side peripheral surface 113 of the top surface portion 111 of the elastic plug 11, and is in a non-heat welded state at these contact portions. Further, the lower frame portion 31b is in contact with the peripheral edge portion 112a of the bottom surface portion 112 of the elastic plug body 11, and the contact portion is in a heat welded state.

The medical cap 30 of the present embodiment can be applied to a drug container such as an infusion container, for example. Examples of the mouth portion of the drug container have a substantially cylindrical shape as a whole and have an annular collar on the outer peripheral surface. When the medical cap 30 is attached to the mouth portion, the flange portion 311 for joining the outer frame body 31 and the annular flange of the mouth portion are joined by a method such as ultrasonic welding or heat welding. The constituent material of the mouth portion is not particularly limited, and for example, the same constituent material as that of the outer frame 31 can be adopted.

[Manufacturing method of medical cap]
Next, a method for manufacturing the medical cap according to the present embodiment will be described with reference to FIGS. 14 to 16.
FIG. 14 is a schematic cross-sectional view for explaining a method for manufacturing a medical cap, and FIG. 14A shows a state in which a pair of molds are closed and a cavity for molding an upper frame portion is formed. FIG. 3B shows a state in which the mold is opened after the upper frame portion is molded, and FIG. 3C shows a state in which an elastic plug is inserted into the upper frame portion. Further, FIG. 15 is a schematic cross-sectional view for explaining a method for manufacturing a medical cap, and in FIG. 15A, a pair of molds are closed and a cavity for forming a lower frame portion is formed. The figure (b) shows the state of opening the mold after the lower frame portion is molded, and the figure (c) shows the state of the medical cap after molding. FIG. 16 is a partially enlarged cross-sectional view showing an engaging portion provided inside the first mold used for molding the upper frame portion of the medical cap.

The method for manufacturing a medical cap according to the present embodiment includes at least an outer frame body forming step of forming an outer frame body 12 that holds the elastic stopper 11 inside. More specifically, the outer frame body forming step includes a step of forming the upper frame portion 31a, a step of inserting the elastic stopper 11 inside the upper frame portion 31a, and a step of forming the lower frame portion 31b. .. Further, the present embodiment may include a step of manufacturing an elastic plug as in the case of the first embodiment.

The molding step of the upper frame portion 31a is first performed by injection molding using the first mold 321 and the second mold 322 as shown in FIG. 14 (a). The first mold 321 is a cavity (female mold, fixed side mold or lower mold), and the second mold 322 is a core (male mold, movable side mold or upper mold). The first mold 321 and the second mold 322 have a structure in which a cavity 323 capable of forming the upper frame portion 31a is formed when both are closed.

As shown in FIG. 16, the first mold 321 has an engaging portion 136 capable of forming a groove portion 123 in the flange portion 311 of the lower frame portion 31b. As described in the first embodiment, the engaging portion 136 is composed of an annular ridge portion corresponding to the shape of the groove portion 123 to be formed. Further, the engaging portion 136 is provided in an annular shape on the inner wall surface of the first mold 321 corresponding to the position where the groove portion 123 on the outer peripheral surface 313 of the flange portion 311 is formed. This makes it possible to form an annular groove portion 123 on the outer peripheral surface 313 of the flange portion 311.

The upper frame portion 31a is molded by injecting a molten resin obtained by melting the resin that is a constituent material of the upper frame portion 31a into the cavity 323 for molding the upper frame portion 31a. The injection pressure of the molten resin is not particularly limited and may be appropriately set as needed. The injected molten resin is cooled in the cavity 323 for molding the upper frame portion 31a. The cooling time is not particularly limited and may be set as needed.

Subsequently, as shown in FIG. 14B, the first mold 321 and the second mold 322 are opened, whereby the upper frame portion 31a provided with the flange portion 311 can be formed. An annular groove portion 123 is provided on the outer peripheral surface 313 of the flange portion 311, and the groove portion 123 is engaged with the engaging portion 136 of the first mold 321. Therefore, the upper frame portion 31a is the first mold 321. It is temporarily fixed to. Therefore, in this step, when the first mold 321 and the second mold 322 are opened, the upper frame portion 31a is in close contact with the second mold 322 and a mold release defect occurs. Can be prevented. As a result, it is possible to prevent a decrease in manufacturing efficiency.

Next, as shown in FIG. 14 (c), the elastic plug 11 prepared in advance is inserted into the upper frame portion 31a in a state where the upper frame portion 31a is fixed in the first mold 321. do. The elastic plug 11 is inserted so that the top surface portion 111 is on the upper frame portion 31a side (lower side in FIG. 14C).

Subsequently, as shown in FIG. 15A, a molding step of the lower frame portion 31b is performed. This step is performed in a state where the upper frame portion 31a is fixed to the first mold 321 and the elastic plug 11 is further inserted into the upper frame portion 31a. Further, in this step, a first mold 321 and a third mold 324 capable of forming a cavity 325 for forming the lower frame portion by closing the mold of the first mold 321 are used. conduct. Therefore, the first mold 321 functions as a common mold that can also be applied to the molding of the lower frame portion 31b.

In the molding step of the lower frame portion 31b, the molten resin obtained by melting the resin which is the constituent material of the lower frame portion 31b is melted in the state where the elastic plug 11 is housed inside, and the cavity 325 for molding the lower frame portion 31b is used. It is done by injecting inside. The injection pressure of the molten resin is not particularly limited and may be appropriately set as needed. The injected molten resin is cooled in a closed state. The cooling time is not particularly limited and may be set as needed.

Next, as shown in FIG. 15B, the first mold 321 and the third mold 324 are opened. At this time, the upper frame portion 31a holds a state of being temporarily fixed to the first mold 321 by engaging the groove portion 123 with the engaging portion 136 of the first mold 321. Further, the lower frame portion 31b to be molded is in a state of being heat-welded to the upper frame portion 31a and the elastic plug 11 at their contact surfaces. Therefore, when the first mold 321 and the third mold 324 are opened, the lower frame portion 31b can be prevented from coming into close contact with the third mold 324 and causing a mold release defect. As a result, it is possible to prevent a decrease in manufacturing efficiency.

After opening the molds of the first mold 321 and the third mold 324, as shown in FIG. 15C, an outer frame body 31 holding the elastic plug 11 inside is obtained. The upper frame portion 31a and the lower frame portion 31b are heat-welded at their contact surfaces. Further, the elastic plug 11 is heat-welded on the contact surface with the lower frame portion 31b, while it is not heat-welded on the contact surface with the upper frame portion 31a.

From the above, the medical cap 30 according to the present embodiment can be manufactured. According to the method for manufacturing the medical cap 30 of the present embodiment, in the molding step of the upper frame portion 31a, the groove portion 123 is formed in the upper frame portion 31a by using the first mold 321 having the engaging portion 136. At the same time, the first mold 321 and the second mold 322 are opened in a state where the groove portion 123 is engaged with the engaging portion 136 of the first mold 321 and temporarily fixed. Further, also in the molding process of the lower frame portion 31b, the groove portion 123 is engaged with the engaging portion 136 of the first mold 321 to maintain the temporarily fixed state, and the first mold 321 and the third mold are maintained. 324 mold opening is performed. Therefore, it is possible to prevent the upper frame portion 31a and the lower frame portion 31b from coming into close contact with the second mold 322 and the third mold 324 at the time of molding, respectively, and causing a mold release defect. As a result, it is possible to provide a method for manufacturing a medical cap in which a decrease in manufacturing efficiency is suppressed.

(Embodiment 4)
The medical cap according to the fourth embodiment of the present invention and a method for manufacturing the same will be described below.
The fourth embodiment is different from the first embodiment in that the outer frame body is not composed of the upper frame portion and the lower frame portion, but is configured by integral molding.

[Medical cap]
The medical cap according to the fourth embodiment will be described below with reference to FIGS. 17 and 18. The components having the same functions as those of the first to third embodiments are designated by the same reference numerals and detailed description thereof will be omitted. FIG. 17A is a side view showing the medical cap according to the fourth embodiment, and FIG. 17B is a schematic cross-sectional view of the medical cap. FIG. 18A is a plan view showing the medical cap, and FIG. 18B is a bottom view showing the medical cap.

As shown in FIGS. 17 (a), 17 (b), 18 (a) and 18 (b), the medical cap 40 of the present embodiment holds the elastic plug 11 and the elastic plug 11 inside. It has at least an outer frame body 41.

The material constituting the outer frame body 41 is not particularly limited, and the same material as that of the outer frame body 12 of the first embodiment can be used. The outer frame 41 is provided with a flange portion 411 that enables joining with the mouth portion of a drug container or the like. An annular groove portion 123 is provided as a notch on the outer peripheral surface 412 of the flange portion 411 (see FIG. 3). As a result, after molding the outer frame body 41, when the mold is opened, the molded outer frame body 41 can be engaged with the mold and temporarily fixed. The notch portion provided in the flange portion 411 is not limited to the groove portion 123, and for example, an oblique cut surface or the like according to the second embodiment may be used.

The outer frame body 41 is in contact with the peripheral edge portion 111a on the top surface portion 111 of the elastic plug body 11, the peripheral edge portion 112a on the bottom surface portion 112, and the side peripheral surface 113, and is in a heat-welded state at these contact portions. It has become.

The medical cap 40 of the present embodiment can be applied to a drug container such as an infusion container, for example. Examples of the mouth portion of the drug container have a substantially cylindrical shape as a whole and have an annular collar on the outer peripheral surface. When the medical cap 40 is attached to the mouth portion, the flange portion 411 for joining the outer frame body 41 and the annular flange of the mouth portion are joined by a method such as ultrasonic welding or heat welding. The constituent material of the mouth portion is not particularly limited, and for example, the same constituent material as that of the outer frame 41 can be adopted.

[Manufacturing method of medical cap]
Next, a method for manufacturing the medical cap according to the present embodiment will be described with reference to FIGS. 19 and 20.
19A and 19B are schematic cross-sectional views for explaining a method for manufacturing a medical cap, in which FIG. 19A shows a state in which an elastic plug is inserted into a first mold, and FIG. 19B is shown in FIG. Indicates a state in which a pair of molds are closed to form a cavity for forming an outer frame body, and FIG. 3C shows a state in which the outer frame body is formed. Further, FIG. 20 is a schematic cross-sectional view for explaining a method for manufacturing a medical cap, and FIG. 20A shows a state in which a mold is opened after the outer frame is molded. FIG. (B) shows a medical cap after molding.

The method for manufacturing a medical cap according to the present embodiment includes at least an outer frame body forming step of forming an outer frame body 12 that holds the elastic stopper 11 inside. More specifically, the outer frame body forming step includes a step of inserting the elastic stopper 11 into the inside of the first mold and a step of forming the outer frame body. Further, the present embodiment may include a step of manufacturing an elastic plug as in the case of the first embodiment.

First, as shown in FIG. 19A, the elastic plug 11 is inserted into the inside of the first mold 421. The first mold 421 is a cavity (female mold, fixed side mold or lower mold), and the second mold 422 that is closed with the first mold 421 is a core (male mold, movable side mold or lower mold). Upper mold).

The first mold 421 has an engaging portion capable of forming the groove portion 123 on the flange portion 411 of the outer frame body 41 (see FIG. 6). As described in the first embodiment, the engaging portion is composed of an annular ridge portion corresponding to the shape of the groove portion 123 to be formed. Further, the engaging portion is provided in an annular shape on the inner wall surface of the first mold 421 corresponding to the position where the groove portion 123 is formed on the outer peripheral surface 412 of the flange portion 411. This makes it possible to form an annular groove portion 123 on the outer peripheral surface 412 of the flange portion 411.

Next, as shown in FIG. 19B, the first mold 421 and the second mold 422 are closed to form a cavity 423 capable of forming the outer frame 41. As shown in FIG. 19C, the outer frame body 41 is molded by injecting a molten resin obtained by melting a resin that is a constituent material of the outer frame body 41 into a cavity 423 for molding the outer frame body 41. .. The injection pressure of the molten resin is not particularly limited and may be appropriately set as needed. The injected molten resin is cooled in the cavity 423 for molding the outer frame 41. The cooling time is not particularly limited and may be set as needed.

Subsequently, as shown in FIG. 20A, the first mold 421 and the second mold 422 are opened, whereby the outer frame 41 provided with the flange portion 411 can be formed. An annular groove portion 123 is provided on the outer peripheral surface 412 of the flange portion 411, and the groove portion 123 is engaged with the engaging portion of the first mold 421. Therefore, the outer frame body 41 is attached to the first mold 421. It is temporarily fixed. Therefore, in this step, when the first mold 421 and the second mold 422 are opened, the outer frame body 41 is in close contact with the second mold 422 and a mold release defect occurs. Can be prevented. As a result, it is possible to prevent a decrease in manufacturing efficiency.

After opening the molds of the first mold 421 and the second mold 422, as shown in FIG. 20B, an outer frame body 41 holding the elastic plug 11 inside is obtained. The elastic plug 11 and the outer frame 41 are heat-welded at their contact surfaces.

As described above, the medical cap 40 according to the present embodiment can be manufactured. According to the method for manufacturing the medical cap 40 of the present embodiment, in the molding process of the outer frame body 41, the groove portion 123 is formed in the outer frame body 41 by using the first mold 421 having the engaging portion. At the same time, the first mold 421 and the second mold 422 are opened in a state where the groove portion 123 is engaged with the engaging portion of the first mold 421 and temporarily fixed. As a result, it is possible to prevent the outer frame body 41 from coming into close contact with the second mold 422 and causing a mold release defect during its molding. As a result, it is possible to provide a method for manufacturing a medical cap in which a decrease in manufacturing efficiency is suppressed.

10, 20, 30, 40 Medical cap 11 Elastic plug 111 Top surface 111a Peripheral part 111b Needle piercing surface 111c Protrusion part 112 Bottom part 112a Peripheral part 112b Liquid contact surface 113 Side peripheral surface 12, 21, 31, 41 Outside Frame 120 Overhanging part 121, 211, 311 411 Flange part 122, 412 Outer peripheral surface 123, 141, 142, 143, 144 Groove part (notch part)
123a, 123b Groove surface 124 Lower surface 125 Upper surface 12a, 21a, 31a Upper frame portion 12b, 21b, 31b Lower frame portion 131, 231, 321 First mold 132, 322 Second mold 133, 135, 323, 325, 423 Cavity 134, 324 Third mold 136, 232 Engagement part 137 Space part 141a, 141b Groove surface 142a, 142b Groove surface 212 Oblique cut surface (cutout part)
233 Inner wall surface 313 Outer surface surface 412 Notch

Claims (8)

A medical cap that enables closure of the mouth portion by joining with the mouth portion of the container and has an elastic plug body and an outer frame body that holds the elastic plug body inside.
On one side of the outer frame body, an annular flange portion that enables joining with the mouth portion of the container and that projects outward from the side peripheral surface of the outer frame body is provided.
At least one notch is provided on the outer peripheral surface of the flange portion.
After molding the outer frame body using the pair of dies, the notch portion engages with one of the dies when the pair of dies are opened, so that the outer frame is attached to the other die. A medical cap that prevents the frame from coming into close contact . The medical cap according to claim 1, wherein the notch portions are provided on the outer peripheral surface of the flange portion in a ring-shaped connection or a plurality of rings at an arbitrary distance. The medical cap according to claim 1 or 2, wherein the notch is a groove in a vertical cross-sectional shape. The medical cap according to claim 3, wherein the groove surface on the joint side with the mouth portion of the container in the groove portion is a concave curved surface, and the groove surface on the opposite side to the joint side is an inclined surface. The medical cap according to claim 3, wherein the groove portion has a substantially V-shaped shape, a substantially trapezoidal shape, or a substantially rectangular shape in a vertical cross-sectional shape. The medical cap according to claim 3, wherein the groove surface on the side opposite to the joint side is a gentle slope as compared with the groove surface on the joint side with the mouth portion of the container in the groove portion. The notch portion is an oblique cut surface in which a part of the outer peripheral surface of the flange portion is notched over the entire circumference.
The medical cap according to claim 1 or 2, wherein the slanted surface is provided on a joint side with the mouth portion of the container. A method for manufacturing a medical cap having an elastic plug body and an outer frame body for holding the elastic plug body inside, which enables the mouth portion to be closed by joining with the mouth portion of the container.
A first mold provided with at least one engaging portion for forming at least one notch on the outer peripheral surface of the flange portion of the outer frame body and the first mold are closed to the outside. Using a second mold that forms a cavity for frame molding,
Including an outer frame body forming step of forming an outer frame body having at least one notch portion on the outer peripheral surface of the flange portion.
After molding the outer frame, when the first mold and the second mold are opened, the engaging portion of the first mold is formed on the outer peripheral surface of the flange portion. A method for manufacturing a medical cap in which the outer frame body is locked to a first mold and temporarily fixed by engaging with a portion.

Images