JP3825057B2 - Plunger forming device for sealing agent extrusion container and manufacturing method - Google Patents

Plunger forming device for sealing agent extrusion container and manufacturing method Download PDF

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Publication number
JP3825057B2
JP3825057B2 JP31364193A JP31364193A JP3825057B2 JP 3825057 B2 JP3825057 B2 JP 3825057B2 JP 31364193 A JP31364193 A JP 31364193A JP 31364193 A JP31364193 A JP 31364193A JP 3825057 B2 JP3825057 B2 JP 3825057B2
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plunger
mold
receiving piece
forming
container
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JPH07165275A (en
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仁昭 吉田
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天龍化学工業株式会社
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00576—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes characterised by the construction of a piston as pressure exerting means, or of the co-operating container

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Description

【０００１】
【産業上の利用分野】
本発明は、建物のひび割れを補修等に使用するシール剤（コーキング剤）を充填した円筒状容器（以下「コーキング管」という）に嵌め込んで、シール剤を容器から押し出すための合成樹脂製のプランジャの成形装置及び製造方法に関するものである。
【０００２】
【従来の技術】
建物のひび割れを補修するシール剤は、一端を開口し他端にノズルを備えたコーキング管に充填されており、このコーキング管に、合成樹脂にて断面コ字状に形成したプランジャを一端の開口部から嵌め込んで、使用に際しては、コーキング管を専用の押し出し用ガンに装填し、押し出し用ガンの押圧ロッドにてプランジャをコーキング管の他端（先端）に向けて押し込むことにより、シール剤をコーキング管の他端（先端）のノズルから押し出すようにしている。
【０００３】
この場合、プランジャを単に断面コ字状に形成したに過ぎない形態ではその外径は不変であるため、プランジャ及びコーキング管の寸法誤差や、シール剤の圧力によるコーキング管の直径拡大等により、容器の内周面とプランジャの外周面との間からシール剤がはみ出ると言う問題があった。
【０００４】
そこで、押し出し時のシール性を向上するための手段として、特公昭５７−５７３４３号公報に記載されているように、プランジャの底部を断面内向き凸状（換言すると外向き凹状）に形成することが行われている。
【０００５】
【発明が解決しようとする課題】
このようにプランジャの底部を断面内向き凸状に形成すると、押し出し用ガンにおける押圧ロッドにて底部を押圧することにより、当該底部は平板状に広がるような作用を受け、これに伴ってプランジャのうち底部の箇所の直径が極く僅かながら拡大するため、押し出し時のシール性を向上することができる。
【０００６】
しかし、プランジャにおける底部の内面を押圧ロッドにて押圧する場合、プランジャにおける底部の内面には、押圧ロッドの押圧力が軸方向に沿って作用する一方、プランジャにおける底部の外面には、シール剤の圧力が均等に作用することになり、いわば、プランジャの底部を内外から同じ力で挟圧するような状態になるため、底部を平板状に広がり変形させる機能が低く、このためシール性を向上することに限界があった。
【０００７】
本発明は、容器とのシール性を格段に向上したプランジャの成形装置と製造方法とを提供することを目的とするものである。
【０００８】
【課題を解決するための手段】
本願発明の成形装置は、シール剤が充填された筒状の容器にその一端の開口部から摺動自在に嵌め入れられる筒部と、この筒部のうち容器への嵌め込み方向に向かって先端の部位に連接した底部と、筒部と底部との連接箇所から斜め内向きに延びる受け片とを備えている、という構成の合成樹脂製プランジャを射出成形法によって製造するための装置であって、前記プランジャの外面を形成するための金型と、プランジャの内面を形成するための金型とを備えている。
【０００９】
そして、前記プランジャの内面を形成するための金型は、プランジャにおける筒部の内周面を形成する筒状の外型と、プランジャにおける底板の内面を形成する内型とに分離構成されていて、これら外型と内型とは軸方向に摺動自在に嵌まり合っており、更に、前記外型の先端面は受け片のうち筒部に臨んだ面が形成されるように傾斜している一方、前記内型には、受け片のうち底板に臨んだ面を形成する部分が半径外側に張り出すように設けられている。
【００１０】
本願発明の製造方法は、請求項１に記載した成形装置を使用してシール剤押し出し容器用プランジャを製造する方法であって、前記プランジャの外面を形成するための金型とプランジャの内面を成形するための金型とで形成されたキャビティに溶融樹脂を注入して樹脂を固まらせることによってプランジャと成したのち、プランジャの内面を形成するための外型と内型とを型抜きするにおいて、先に外型を型抜きしてから、受け片を変形させてプランジャを突き出すことによって内型の型抜きを行うものである。
【００１１】
【発明の作用・効果】
本願発明の装置及び製法で製造されたプランジャを容器に嵌め込んだ状態で、押し出し用ガンの押圧ロッドにて受け片が押圧されると、受け片は底部に向けて倒れ変形する。すると、その反作用として、受け片の付け根の箇所は半径外向きに広がるような作用を受ける。すなわち、押圧ロッドの押圧による受け片の変形にて、プランジャのうち受け片の付け根の箇所の外径が拡大する。
【００１２】
この場合、いわばてこの原理によって受け片を変形させるもので、プランジャのうち受け片の付け根の箇所に、押圧ロッドによる押圧力を大きな曲げ力として集中的に作用させることができるから、プランジャのうち受け片の付け根箇所を容器の内周面に密着するように大きく変形させることができる。
従って本発明によると、シール剤の押し出し時において容器とのシール性を格段に向上できるプランジャを製造することができる。
【００１３】
【実施例】
次に、本発明の実施例を図面に基づいて説明する。まず、コーキング管及びプランジャを参考例として説明する。
【００１４】
図１〜図５に示すのは第１の参考例であり、これらの図において符号１はシール剤Ａが充填される円筒状のコーキング管であり、このコーキング管１は、プランジャ２を嵌め込みできるようにその一端を開口する一方、他端には口部３を設けてこれにねじ式のノズル４を着脱自在に嵌着している。
【００１５】
符号５は押し出し用ガンにおけるホルダーを、符号６は押し出し用ガンにおける押圧ロッドをそれぞれ示し、押圧ロッド６の先端には円板状の押圧部６ａを設けている。
【００１６】
前記プランジャ２は、筒部７と、この筒部７のうちコーキング管１への嵌め込み方向に向かった先端部７ａに連接した底部８とを備えており、底部８は外向き凸状に緩く湾曲した断面形状になっている。
【００１７】
筒部７と底部８との連接箇所の内面には、筒部７及び底部８に対して傾斜した状態の受け片９が全周にわたって延びるように、換言すると台錐状の形態になるようにして形成されている。この受け片９の先端には押圧ロッド６の押圧部６ａが接当するような直径に設定されている。
【００１８】
底部８の内面のうち前記受け片９の先端よりも半径内側に位置した部位には、押圧ロッド６の押圧部６ａが接当し得る筒状の規制部１０が形成されている。
【００１９】
前記筒部７の外周面は、その先端部７ａが大径でその他の部位が小径になるような段違い状に形成されており、小径の部位のうち先端部７ａに近接した部位と後端部の２箇所との合計３箇所の部位に、薄肉状の鍔状シール部１１を一体成形している。鍔状シール部１１は、底部８と反対側の方向に向けて傾斜した状態に形成されている。
【００２０】
筒部７のうち底部８との連接箇所の外径Ｄ１はコーキング管１の内径Ｄ２よりも極く僅
かに小径に形成しており、また、各鍔状シール部１１の外径Ｄ３はコーキング管１の内径Ｄ２よりもやや大径に形成している。
【００２１】
以上の構成において、コーキング管１から一旦ノズル４を外して口部３を開口したのちノズル３を嵌め直し、次いで、コーキング管１を押し出し用ガンのホルダー５に装填して、プランジャ２を押圧ロッド６で押圧すると、ノズル４の先端からシール剤Ａが押し出される。
【００２２】
このシール剤Ａの押し出しに際して、プランジャ２の受け片９が押圧ロッド６で押圧されると、図４〜図５に示すように、受け片９は曲がり変形して、受け片９の付け根の箇所（すなわち筒部７の先端部７ａ）が半径外向きに起こされるような作用を受けて、筒部７の先端部７ａの直径が拡大する。
【００２３】
この場合、底部８が断面凸状であるため、受け片９の変形に伴って底部８は平板状になるように変形することになり、このことと、てこの原理によって受け片９の付け根箇所に大きな曲げ力が集中的に作用することにより、筒部７の先端部７ａの外径を速やかに拡大できるのであり、これにより、コーキング管１とプランジャ２との間のシール性を確保できる。
【００２４】
そして、受け片９がある程度まで変形すると押圧ロッド６の押圧部６ａが規制部１０に接当して、それ以上受け片９は変形しなくなるため、プランジャ２がコーキング管１の内面に突っ張り過ぎることが防止されて、プランジャ２をスムースに移動させることができる。
【００２５】
更に、筒部７のうち小径部に鍔状シール部１１が形成されているから、コーキング管１への嵌め込みが容易なプランジャ２でありながら、不使用状態でのシール性を維持できる。
【００２６】
上記の第１参考例は受け片９を環状に連続した状態に形成した場合であったが、図６に示す第２参考例のように、受け片９を円周方向に沿って断続的に延びるように形成しても良い。
【００２７】
上記したプランジャ２は、射出成形法にて成形される。この成形装置の例を図７に示す。
【００２８】
成形装置は、プランジャ２における底部９の外面を形成する第１金型１２と、筒部７の外周面に形成する第２金型１３と、筒部７の内周面を形成する第３金型（外型）１４と、底部８の内面を形成する第４金型（内型）１５とから成り、各金型で形成されたキャビティ１６に第１金型１２のゲート１７から溶融合成樹脂を注入して、これが固まってプランジャ２が成形されてから、例えば、第３金型１４、第２金型１３、第４金型１５の順で後退させ、第４金型１５に摺動自在に装着した突き出しロッド１８にてプランジャ２を第４金型１５から突き出す。
【００２９】
この場合、第２参考例のように受け片９を円周方向に沿って分断した状態に形成すると、第４金型１５からプランジャ２を突き出すに際して、当該受け片９が容易に変形するため、成形に際しての型抜きを容易にすることができる。
【００３０】
図８に示すのは第３参考例であり、この参考例は、底部８を断面外向き凸状に形成する一方、筒部７の先端部７ａを底部８の外周縁から若干前向き突出した状態に形成したものである。この参考例では、筒部７の外周面を、底部８と反対側の後端が大径となるように
テーパ状に形成することにより、シール剤Ａを押し出さない状態でのシール性を確保するようにしている。
【００３１】
図９に示すのは底部８を内向き凸状に形成した第４参考例である。この参考例では規制部１０を設けずに、受け片９を底部８に接当した状態でプランジャ２が過不足のない強さでコーキング管１の内周面に接当するように設定している。
【００３２】
図１０に示すのは第５参考例であり、このうち（Ａ）は底部８の周縁部８ａを内向きの傾斜状に形成し、この底部８の周縁部８ａに受け片９を連接したものであり、また（Ｂ）は、筒部７のうち底部８からやや離れた部位に受け片９を形成したものである。
【図面の簡単な説明】
【図１】第１参考例に係るプランジャの使用状態を示す図である。
【図２】第１参考例に係るプランジャの断面図である。
【図３】第１参考例のプランジャをコーキング管に嵌め込んだ状態での要部拡大図である。
【図４】第１参考例の作用を示す断面図である。
【図５】図４の要部拡大図である。
【図６】第２参考例を示す図で、（Ａ）（Ｂ）のＡ−Ａ視断面図、（Ｂ）は背面図である。
【図７】図６のプランジャの成形装置を示す断面図である。
【図８】第３参考例の要部断面図である。
【図９】第４参考例の要部断面図である。
【図10】第５参考例の要部断面図である。
【符号の説明】
Ａ シール剤（コーキング剤）
１ 円筒状容器（コーキング管）
２ プランジャ
３ 口部
４ ノズル
６ ホルダー
７ 筒部
８ 底部
９ 受け片
１０ 規制部
１１ 鍔状シール部
１２，１３ プランジャの外面を形成するための金型
１４ プランジャの内面を形成するための金型を構成する外型
１５ プランジャの内面を形成するための金型を構成する内型[0001]
[Industrial application fields]
The present invention is fitted in the sealing agent used cracking buildings repair like cylindrical container filled with (caulk) (hereinafter referred to as "coking tube"), Sutame synthetic resin pushed out the sealant from the container The present invention relates to a plunger forming apparatus and a manufacturing method.
[0002]
[Prior art]
Sealing agent that repairs cracks in buildings is filled in a caulking tube with one end open and a nozzle at the other end, and a plunger formed in a U-shaped cross section with synthetic resin is opened at one end of the caulking tube. fitted from parts, in use, the caulking tube inserted in a specific extrusion cancer, by pushing the plunger in the pressure rod of the extrusion gun toward the other end of the coking tube (tip), a sealant It pushes out from the nozzle at the other end (tip) of the caulking tube.
[0003]
In this case, since the outer diameter of the plunger is not changed in a form in which the plunger is simply formed in a U-shaped cross section, the container may be affected by a dimensional error of the plunger and the caulking pipe, or by increasing the diameter of the caulking pipe due to the pressure of the sealing agent. there is a problem that the sealant protrude from between the inner and outer circumferential surfaces of the plunger.
[0004]
Therefore, as a means for improving the sealing property at the time of extrusion, as described in Japanese Patent Publication No. 57-57343, the bottom portion of the plunger is formed in an inward convex section (in other words, an outward concave shape). Has been done.
[0005]
[Problems to be solved by the invention]
When the bottom portion of the plunger is formed in a convex shape inward in the cross section in this way, the bottom portion is subjected to an action that spreads in a flat plate shape by pressing the bottom portion with the pressing rod in the push-out gun. Among them, the diameter of the bottom portion is slightly increased, so that the sealing performance at the time of extrusion can be improved.
[0006]
However, when the inner surface of the bottom portion of the plunger is pressed by the pressing rod, the pressing force of the pressing rod acts along the axial direction on the inner surface of the bottom portion of the plunger, while the sealing agent is applied to the outer surface of the bottom portion of the plunger. The pressure will be applied evenly, so to speak, the bottom of the plunger will be pinched with the same force from inside and outside, so the function of spreading the bottom into a flat plate shape is low, thus improving the sealing performance There was a limit.
[0007]
An object of this invention is to provide the shaping | molding apparatus and manufacturing method of a plunger which improved the sealing performance with a container markedly.
[0008]
[Means for Solving the Problems]
The molding device of the present invention comprises a cylindrical portion that is slidably fitted into a cylindrical container filled with a sealant from an opening at one end thereof, and a tip of the cylindrical portion toward the fitting direction into the container. An apparatus for manufacturing a synthetic resin plunger having a configuration in which a bottom part connected to a part and a receiving piece extending obliquely inward from a connection part between a cylinder part and a bottom part are manufactured by an injection molding method, A mold for forming the outer surface of the plunger and a mold for forming the inner surface of the plunger are provided.
[0009]
And the metal mold | die for forming the inner surface of the said plunger is comprised separately by the cylindrical outer mold | type which forms the inner peripheral surface of the cylinder part in a plunger, and the inner type | mold which forms the inner surface of the bottom plate in a plunger. The outer mold and the inner mold are slidably fitted in the axial direction, and the distal end surface of the outer mold is inclined so that a surface of the receiving piece facing the cylinder portion is formed. On the other hand, the inner mold is provided so that a portion of the receiving piece that forms a surface facing the bottom plate projects outwardly in the radius.
[0010]
Production method of the present invention is a method of manufacturing a sealant extrusion container plunger using the molding apparatus according to claim 1, forming the inner surface of the mold and the plunger for forming the outer surface of the plunger In forming a plunger by injecting a molten resin into a cavity formed with a mold for solidifying the resin and then forming the plunger, in the mold release of the outer mold and the inner mold for forming the inner surface of the plunger, After the outer die is first punched, the inner die is punched by deforming the receiving piece and projecting the plunger.
[0011]
[Operation and effect of the invention]
If the receiving piece is pressed by the pressing rod of the pushing gun while the plunger manufactured by the apparatus and the manufacturing method of the present invention is fitted in the container, the receiving piece falls down and deforms toward the bottom. Then, as the reaction, the base part of the receiving piece is subjected to the action of spreading outward in the radius. That is, the outer diameter of the base portion of the receiving piece of the plunger is increased by the deformation of the receiving piece due to the pressing of the pressing rod.
[0012]
In this case, the receiving piece is deformed by this principle, and the pressing force by the pressing rod can be concentratedly applied as a large bending force to the base of the receiving piece of the plunger. The base portion of the receiving piece can be greatly deformed so as to be in close contact with the inner peripheral surface of the container.
Therefore, according to the present invention, it is possible to manufacture a plunger that can remarkably improve the sealing performance with the container when the sealing agent is extruded.
[0013]
【Example】
Next, will be described on the basis of the present onset Ming real施例to the accompanying drawings. First, a caulking tube and a plunger will be described as reference examples.
[0014]
1 to 5 show a first reference example. In these drawings, reference numeral 1 denotes a cylindrical caulking pipe filled with a sealing agent A , and the caulking pipe 1 can be fitted with a plunger 2. As described above, one end is opened, and the other end is provided with a mouth portion 3, and a screw type nozzle 4 is detachably fitted thereto.
[0015]
Reference numeral 5 denotes a holder in the push-out gun, and reference numeral 6 denotes a press rod in the push-out gun. A disc-like press portion 6 a is provided at the tip of the press rod 6.
[0016]
The plunger 2 includes a cylindrical portion 7 and a bottom portion 8 connected to a distal end portion 7a of the cylindrical portion 7 facing the fitting direction into the caulking pipe 1, and the bottom portion 8 is gently curved outwardly convexly. It has a cross-sectional shape.
[0017]
On the inner surface of the connecting portion between the cylindrical portion 7 and the bottom portion 8, the receiving piece 9 in an inclined state with respect to the cylindrical portion 7 and the bottom portion 8 extends over the entire circumference, in other words, a trapezoidal shape. Is formed. The diameter of the receiving piece 9 is set such that the pressing portion 6a of the pressing rod 6 contacts the tip.
[0018]
A cylindrical restricting portion 10 that can contact the pressing portion 6 a of the pressing rod 6 is formed in a portion of the inner surface of the bottom portion 8 that is located radially inside the tip of the receiving piece 9.
[0019]
The outer peripheral surface of the cylindrical portion 7 is formed in a stepped shape such that the tip portion 7a has a large diameter and the other portions have a small diameter, and the portion close to the tip portion 7a and the rear end portion of the small diameter portion The thin-walled bowl-shaped seal portion 11 is integrally formed at a total of three sites including the two sites. The bowl-shaped seal part 11 is formed in a state inclined toward the direction opposite to the bottom part 8.
[0020]
The outer diameter D1 of the connecting portion of the cylindrical portion 7 with the bottom portion 8 is formed to be slightly smaller than the inner diameter D2 of the caulking tube 1, and the outer diameter D3 of each bowl-shaped seal portion 11 is the caulking tube. The inner diameter D2 is slightly larger than the inner diameter D2.
[0021]
In the above configuration, the nozzle 4 is once removed from the caulking tube 1 and the opening 3 is opened. Then, the nozzle 3 is re-fitted, and then the caulking tube 1 is loaded into the holder 5 of the pushing gun, and the plunger 2 is pressed into the pressing rod. When pressed with 6, the sealing agent A is pushed out from the tip of the nozzle 4.
[0022]
When the receiving piece 9 of the plunger 2 is pressed by the pressing rod 6 when the sealing agent A is pushed out, the receiving piece 9 is bent and deformed as shown in FIGS. The diameter of the distal end portion 7a of the cylindrical portion 7 is expanded by receiving an action such that the distal end portion 7a of the cylindrical portion 7 is raised radially outward.
[0023]
In this case, since the bottom portion 8 has a convex cross section, the bottom portion 8 is deformed so as to have a flat plate shape as the receiving piece 9 is deformed. When a large bending force acts on the tube portion 7, the outer diameter of the distal end portion 7 a of the cylindrical portion 7 can be quickly expanded, and thereby the sealing performance between the caulking tube 1 and the plunger 2 can be ensured.
[0024]
When the receiving piece 9 is deformed to a certain extent, the pressing portion 6a of the pressing rod 6 comes into contact with the restricting portion 10, and the receiving piece 9 is not deformed any further, so that the plunger 2 is too stretched on the inner surface of the caulking pipe 1. Is prevented, and the plunger 2 can be moved smoothly.
[0025]
Furthermore, since the bowl-shaped seal portion 11 is formed in the small diameter portion of the cylindrical portion 7, the sealing performance in the non-use state can be maintained while the plunger 2 can be easily fitted into the caulking tube 1.
[0026]
The above first reference example is a case where the receiving piece 9 is formed in an annularly continuous state, but the receiving piece 9 is intermittently formed along the circumferential direction as in the second reference example shown in FIG. You may form so that it may extend.
[0027]
The above-described plunger 2 is molded by an injection molding method. An example of this molding apparatus is shown in FIG.
[0028]
The molding apparatus includes a first mold 12 that forms the outer surface of the bottom portion 9 of the plunger 2, a second mold 13 that is formed on the outer peripheral surface of the cylindrical portion 7, and a third mold that forms the inner peripheral surface of the cylindrical portion 7. It consists of a mold (outer mold) 14 and a fourth mold (inner mold) 15 that forms the inner surface of the bottom 8, and melted synthetic resin from a gate 17 of the first mold 12 to a cavity 16 formed by each mold. And the plunger 2 is molded. For example, the third mold 14, the second mold 13, and the fourth mold 15 are moved back in this order, and the fourth mold 15 can be slid freely. The plunger 2 is ejected from the fourth mold 15 by the ejecting rod 18 attached to.
[0029]
In this case, when the receiving piece 9 is divided in the circumferential direction as in the second reference example, when the plunger 2 is protruded from the fourth mold 15, the receiving piece 9 is easily deformed. The mold can be easily removed during molding.
[0030]
FIG. 8 shows a third reference example. In this reference example, the bottom portion 8 is formed in a convex shape outward in cross section, while the tip portion 7a of the cylindrical portion 7 protrudes slightly forward from the outer peripheral edge of the bottom portion 8. Is formed. In this reference example, the outer peripheral surface of the cylindrical portion 7, opposite to the rear and bottom 8 by tapered such that the diameter, to secure the sealing property by non extruded sealant A I am doing so.
[0031]
FIG. 9 shows a fourth reference example in which the bottom 8 is formed in an inwardly convex shape. In this reference example, the restricting portion 10 is not provided, and the plunger 2 is set in contact with the inner peripheral surface of the caulking pipe 1 with sufficient strength in a state where the receiving piece 9 is in contact with the bottom portion 8. Yes.
[0032]
FIG. 10 shows a fifth reference example, in which (A) has a peripheral portion 8a of the bottom portion 8 formed in an inwardly inclined shape, and a receiving piece 9 connected to the peripheral portion 8a of the bottom portion 8. Further, (B) is one in which a receiving piece 9 is formed in a portion of the cylindrical portion 7 that is slightly separated from the bottom portion 8.
[Brief description of the drawings]
FIG. 1 is a diagram showing a usage state of a plunger according to a first reference example.
FIG. 2 is a cross-sectional view of a plunger according to a first reference example.
FIG. 3 is an enlarged view of a main part in a state where the plunger of the first reference example is fitted in the caulking pipe.
FIG. 4 is a cross-sectional view showing the operation of the first reference example.
FIG. 5 is an enlarged view of a main part of FIG.
6A and 6B are views showing a second reference example, and are cross-sectional views taken along line AA in FIGS.
7 is a cross-sectional view showing the plunger molding apparatus of FIG. 6. FIG.
FIG. 8 is a cross-sectional view of a main part of a third reference example.
FIG. 9 is a cross-sectional view of a main part of a fourth reference example.
FIG. 10 is a cross-sectional view of main parts of a fifth reference example.
[Explanation of symbols]
A sealant ( caulking agent )
1 yen tubular container (coking tube)
2 Plunger 3 Mouth part 4 Nozzle 6 Holder 7 Tube part 8 Bottom part 9 Receiving piece 10 Restricting part 11 Gutter-shaped seal part 12, 13 Mold for forming the outer surface of the plunger 14 Mold for forming the inner surface of the plunger Constructing outer mold 15 Inner mold composing a mold for forming the inner surface of the plunger

Claims (2)

シール剤が充填された円筒状容器にその一端の開口部から摺動自在に嵌め入れられる筒部と、この筒部のうち容器への嵌め込み方向に向かって先端の部位に連接した底部と、筒部と底部との連接箇所から斜め内向きに延びる受け片とを備えている合成樹脂製プランジャを射出成形法によって製造するための装置であって、
前記プランジャの外面を形成するための金型と、プランジャの内面を形成するための金型とを備えており、
前記プランジャの内面を形成するための金型は、プランジャにおける筒部の内周面を形成する筒状の外型と、プランジャにおける底板の内面を形成する内型とに分離構成されていて、これら外型と内型とは軸方向に摺動自在に嵌まり合っており、更に、前記外型の先端面は受け片のうち筒部に臨んだ面が形成されるように傾斜している一方、前記内型には、受け片のうち底板に臨んだ面を形成する部分が半径外側に張り出すように設けられている、シール剤押し出し容器用プランジャの成形装置。A cylindrical portion that is slidably fitted into a cylindrical container filled with a sealing agent from an opening at one end thereof, a bottom portion that is connected to a tip portion of the cylindrical portion in the fitting direction into the container, and a cylinder An apparatus for manufacturing a synthetic resin plunger comprising a receiving piece extending obliquely inward from a connecting portion between a portion and a bottom portion by an injection molding method,
A mold for forming the outer surface of the plunger, and a mold for forming the inner surface of the plunger,
The mold for forming the inner surface of the plunger is separated into a cylindrical outer mold that forms the inner peripheral surface of the cylindrical portion of the plunger and an inner mold that forms the inner surface of the bottom plate of the plunger. The outer mold and the inner mold are slidably fitted in the axial direction, and the front end surface of the outer mold is inclined so that a surface of the receiving piece facing the cylinder portion is formed. The device for forming a plunger for a sealant push-out container is provided in the inner mold so that a portion of the receiving piece that forms a surface facing the bottom plate projects outwardly in the radius. 請求項１に記載した成形装置を使用してシール剤押し出し容器用プランジャを製造する方法であって、
前記プランジャの外面を形成するための金型とプランジャの内面を成形するための金型とで形成されたキャビティに溶融樹脂を注入して樹脂を固まらせることによってプランジャと成したのち、プランジャの内面を形成するための外型と内型とを型抜きするにおいて、先に外型を型抜きしてから、受け片を変形させてプランジャを突き出すことによって内型の型抜きを行う、
シール剤押し出し容器用プランジャの製造方法。A method for producing a plunger for a sealant extrusion container using the molding apparatus according to claim 1,
The inner surface of the plunger is formed by injecting molten resin into a cavity formed by a mold for forming the outer surface of the plunger and a mold for forming the inner surface of the plunger to solidify the resin. In the die cutting of the outer mold and the inner mold to form the inner mold, the outer mold is first punched, and then the inner mold is punched by deforming the receiving piece and projecting the plunger.
Manufacturing method of plunger for sealing agent extrusion container.
JP31364193A 1993-12-14 1993-12-14 Plunger forming device for sealing agent extrusion container and manufacturing method Expired - Lifetime JP3825057B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31364193A JP3825057B2 (en) 1993-12-14 1993-12-14 Plunger forming device for sealing agent extrusion container and manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31364193A JP3825057B2 (en) 1993-12-14 1993-12-14 Plunger forming device for sealing agent extrusion container and manufacturing method

Publications (2)

Publication Number Publication Date
JPH07165275A JPH07165275A (en) 1995-06-27
JP3825057B2 true JP3825057B2 (en) 2006-09-20

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JP2004188365A (en) * 2002-12-13 2004-07-08 Tiger Industry Co Ltd Cap for calking compound syringe
JP6152936B2 (en) * 2013-03-11 2017-06-28 株式会社マルテー大塚 Viscous fluid dispenser
JP6141758B2 (en) * 2013-12-06 2017-06-07 原化成株式会社 Injector cartridge and injector
JP6441175B2 (en) * 2015-06-25 2018-12-19 株式会社Ｓｕｂａｒｕ Sealant coating apparatus and method for producing sealant coated product
JP6913485B2 (en) * 2017-03-14 2021-08-04 小林製薬株式会社 Extruder
JP7094906B2 (en) * 2019-02-15 2022-07-04 三菱重工業株式会社 Fluid material discharge device

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