JP2002225095A5 - - Google Patents
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- JP2002225095A5 JP2002225095A5 JP2001366927A JP2001366927A JP2002225095A5 JP 2002225095 A5 JP2002225095 A5 JP 2002225095A5 JP 2001366927 A JP2001366927 A JP 2001366927A JP 2001366927 A JP2001366927 A JP 2001366927A JP 2002225095 A5 JP2002225095 A5 JP 2002225095A5
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Description
【０００８】
【課題を解決するための手段】
上記目的を達成するため、
請求項１記載の発明は、プランジャ挿入用の胴部を成形するための胴部成形用キャビティ、胴部後端の開口周縁に形成される鍔部を成形するための鍔部成形用キャビティ、および胴部前端に形成される注射針装着用の筒状突起を成形するための筒状突起成形用キャビティを含むシリンダ成形用キャビティと、互いに型締めされて、合成樹脂製注射器のシリンダ成形用キャビティを形成するための固定型板及び可動型板と、上記固定型板に固定されるコアと、上記固定型板を取り付ける固定側取付板側から可動型板に向けて延びるエッジゲート型のホットランナノズルと、ホットランナノズルの可動型板側の端部の側部から鍔部成形用キャビティの側部に通ずるゲートと、シリンダ成形用キャビティを取り囲んで配置される冷却経路とを備えることを特徴とする合成樹脂製注射器シリンダの射出成形用金型を提供するものである。0008
[Means for solving problems]
To achieve the above objectives
The invention according to claim 1 is a body forming cavity for forming a body for inserting a plunger, a flange forming cavity for forming a flange formed on the peripheral edge of an opening at the rear end of the body, and a flange forming cavity. A cylinder molding cavity including a tubular protrusion molding cavity for forming a tubular protrusion for mounting an injection needle formed at the front end of the body, and a cylinder molding cavity of a synthetic resin injector that is molded from each other. A fixed template and a movable template for forming , a core fixed to the fixed template, and an edge gate type hot runner nozzle extending from the fixed side mounting plate side to which the fixed template is attached toward the movable template. It is characterized by having a gate leading from the side portion of the end portion of the hot runner nozzle on the movable template side to the side portion of the flange forming cavity, and a cooling path arranged so as to surround the cylinder forming cavity. A mold for injection molding of a synthetic resin injector cylinder is provided.
【０００９】
本発明では、キャビティとホットランナノズルとが互いに側方に並んで、すなわち重なって配置されることを極力回避することができる。したがって、シリンダ成形用キャビティの周囲をまんべんなく一様に取り囲んで冷却経路を配置することが可能となる。これにより、シリンダ成形用キャビティ内の樹脂の収縮速度の均一化を促進でき、収縮時に生ずる反りや倒れを防止することができる。成形速度を増大しても、上記の反り等の発生のおそれがなく、結果として、成形速度を増大して生産性を向上させることができる。
成形時の１サイクル終了後に、ホットランナノズルの溶融樹脂射出口に、固化された樹脂チップが残存するおそれがあり、このチップが次のサイクルでキャビティ内に押し出されて成形品内で異物となるおそれがある。これに対して、本発明では、仮に、成形品である注射器のシリンダに上記のチップが異物として残存しても、薬液封入部分ではなく、鍔部にあるので、全く問題がない。
また、鍔部に対応してゲートを設けるので、コアの比較的基端寄りの部位にゲートを対応させることができる結果、コアの倒れ等を防止して、成形品の偏肉の発生を防止することができる。 0009
In the present invention, it is possible to prevent the cavity and the hot runner nozzle from being arranged side by side with each other, that is, overlapping with each other as much as possible. Therefore, it is possible to arrange the cooling path by evenly and evenly surrounding the cylinder forming cavity. As a result, it is possible to promote uniform shrinkage rate of the resin in the cylinder molding cavity, and it is possible to prevent warpage and collapse that occur during shrinkage. Even if the molding speed is increased, there is no possibility of the above-mentioned warpage or the like occurring, and as a result, the molding speed can be increased and the productivity can be improved.
After the end of one cycle during molding, solidified resin chips may remain in the molten resin injection port of the hot runner nozzle, and these chips are extruded into the cavity in the next cycle and become foreign matter in the molded product. There is a risk. On the other hand, in the present invention, even if the above-mentioned tip remains as a foreign substance in the cylinder of a syringe which is a molded product, there is no problem because it is not in the chemical solution-filled portion but in the flange portion.
In addition, since the gate is provided corresponding to the flange, the gate can be made to correspond to the part relatively close to the base end of the core. can do.
【００１０】
請求項２記載の発明は、プランジャ挿入用の胴部を成形するための胴部成形用キャビティ、胴部後端の開口周縁に形成される鍔部を成形するための鍔部成形用キャビティ、および胴部前端に形成される注射針装着用の筒状突起を成形するための筒状突起成形用キャビティを含むシリンダ成形用キャビティと、互いに型締めされて、合成樹脂製注射器のシリンダ成形用キャビティを形成するための固定型板及び可動型板と、上記固定型板に固定されるコアと、上記固定型板を取り付ける固定側取付板側から可動型板に向けて延びるエッジゲート型のホットランナノズルと、ホットランナノズルの可動型板側の端部の側部から鍔部成形用キャビティの近傍の胴部成形用キャビティの側部に通ずるゲートと、シリンダ成形用キャビティを取り囲んで配置される冷却経路とを備えることを特徴とする合成樹脂製注射器シリンダの射出成形用金型を提供する。
仮に、ゲートを胴部成形用キャビティにおいて筒状突起成形用キャビティの近傍部分に設けるとすると、胴部成形用キャビティの内周を区画するためのコアの先端部側にゲートが対応することになり、ゲートからの溶融樹脂の射出圧によりコアが倒れたり変形したりするおそれがある。これに対して、本発明では、コアの比較的基端寄りの部位にゲートを対応させることができるので、コアの倒れ等を防止して、成形品の偏肉の発生を防止することができる。0010
The invention according to claim 2 has a body forming cavity for forming a body for inserting a plunger, a flange forming cavity for forming a flange formed on the peripheral edge of an opening at the rear end of the body, and a flange forming cavity. A cylinder molding cavity including a tubular protrusion molding cavity for forming a tubular protrusion for mounting an injection needle formed at the front end of the body, and a cylinder molding cavity of a synthetic resin injector that is molded from each other. A fixed template and a movable template for forming, a core fixed to the fixed template, and an edge gate type hot runner nozzle extending from the fixed side mounting plate side to which the fixed template is attached toward the movable template. A gate leading from the side of the end of the hot runner nozzle on the movable template side to the side of the body forming cavity near the flange forming cavity, and a cooling path arranged surrounding the cylinder forming cavity. Provided is an injection molding mold for a synthetic resin injector cylinder, which comprises the above.
Assuming that the gate is provided in the vicinity of the tubular protrusion forming cavity in the body forming cavity, the gate corresponds to the tip end side of the core for partitioning the inner circumference of the body forming cavity. Therefore, the core may collapse or be deformed due to the injection pressure of the molten resin from the gate. On the other hand, in the present invention, since the gate can be made to correspond to the portion of the core relatively close to the base end, it is possible to prevent the core from collapsing and prevent the occurrence of uneven thickness of the molded product. ..
【００１１】
請求項３記載の発明は、請求項１において、ゲート位置が、鍔部の側縁に設けられる切欠き凹部の底に対応することを特徴とするものである。
請求項４記載の発明は、請求項３において、ゲート位置が、鍔部の側縁において胴部後端の開口周縁から最も離れた位置に設けられる切欠き凹部の底に対応することを特徴とするものである。 [0011]
The invention according to claim 3 is characterized in that, in claim 1, the gate position corresponds to the bottom of the notch recess provided on the side edge of the flange portion .
The invention according to claim 4 is characterized in that, in claim 3, the gate position corresponds to the bottom of the notch recess provided at the side edge of the collar portion at the position farthest from the opening peripheral edge of the rear end of the body portion. It is something to do.
【００１３】
請求項５記載の発明は、請求項１乃至４の何れか１つに記載の射出成形用金型を用いて合成樹脂製注射器シリンダを成形する方法であって、上記注射器の筒状突起の先端面に対応する筒状突起成形用キャビティの底面を区画するために可動型板に設けられる可動軸を、筒状突起成形用キャビティへの溶融樹脂の充填後に固定型板に向けて進出させて、筒状突起成形用キャビティの底面を位置決めするようにしてあることを特徴とするものである。0013
The invention according to claim 5 is a method for molding a synthetic resin syringe cylinder using the injection molding mold according to any one of claims 1 to 4, wherein the tip of the tubular protrusion of the syringe is formed. A movable shaft provided on the movable mold plate for partitioning the bottom surface of the cylindrical protrusion molding cavity corresponding to the surface is advanced toward the fixed mold plate after filling the tubular protrusion molding cavity with the molten resin. It is characterized in that the bottom surface of the cavity for forming a tubular protrusion is positioned.
【００１５】
請求項６記載の発明は、プランジャを挿入するための胴部を備え、胴部前端に注射針を装着するための筒状突起を有すると共に胴部後端の開口周縁に鍔部を有し、鍔部の側縁に切欠き凹部を設け、この切欠き凹部の底に対応するゲート位置からの射出成形により形成されることを特徴とする合成樹脂製注射器シリンダを提供するものである。本発明では、ホットランナノズルの射出口に残存する固体の樹脂チップが成形品であるシリンダに異物として残存しても、薬液封入部分ではなく、鍔部にとどまるので、全く問題がない。
請求項７記載の発明は、請求項６において、上記切欠き凹部が鍔部の側縁において胴部後端の開口周縁から最も離れた位置に設けられることを特徴とするものである。 0015.
The invention according to claim 6 is provided with a body portion for inserting a plunger, has a tubular protrusion for mounting an injection needle at the front end of the body portion, and has a flange portion at the opening peripheral edge of the rear end of the body portion. Provided is a synthetic resin syringe cylinder characterized in that a notch recess is provided on the side edge of the flange portion and is formed by injection molding from a gate position corresponding to the bottom of the notch recess . In the present invention, even if the solid resin chip remaining in the injection port of the hot runner nozzle remains as a foreign substance in the cylinder which is a molded product, it stays in the flange portion instead of the chemical liquid-filled portion, so that there is no problem at all.
The invention according to claim 7 is characterized in that, in claim 6, the notch recess is provided at a position farthest from the opening peripheral edge of the rear end of the body portion on the side edge of the collar portion.
【００２５】
なお、本発明は上記の実施の形態に限定されるものではなく、例えば、図４において、ゲートＧを胴部成形用キャビティ２０において鍔部成形用キャビティ２１の近傍部分に配置するようにしても、コア倒れを防止して偏肉の発生を防止することができる。その他、本発明の特許請求の範囲で種々の変更を施すことができる。0025.
The present invention is not limited to the above embodiment. For example, in FIG. 4, the gate G may be arranged in the body forming cavity 20 in the vicinity of the flange forming cavity 21. , It is possible to prevent the core from collapsing and prevent the occurrence of uneven thickness . In addition , various modifications can be made within the scope of the claims of the present invention.
Claims (7)
互いに型締めされて、合成樹脂製注射器のシリンダ成形用キャビティを形成するための固定型板及び可動型板と、
上記固定型板に固定されるコアと、
上記固定型板を取り付ける固定側取付板側から可動型板に向けて延びるエッジゲート型のホットランナノズルと、
ホットランナノズルの可動型板側の端部の側部から鍔部成形用キャビティの側部に通ずるゲートと、
シリンダ成形用キャビティを取り囲んで配置される冷却経路と
を備えることを特徴とする合成樹脂製注射器シリンダの射出成形用金型。 A barrel molding cavity for molding a barrel for inserting a plunger, a ridge molding cavity for molding a ridge formed on an opening peripheral edge of a barrel rear end, and an injection formed on a barrel front end A cylinder forming cavity including a cylindrical protrusion forming cavity for forming a cylindrical protrusion for attaching a needle;
A stationary mold plate and a movable mold plate which are mutually clamped to form a cavity for molding a cylinder of a synthetic resin syringe;
A core fixed to the fixed template;
An edge gate type hot runner nozzle extending toward the movable mold plate from the fixed side mounting plate side to which the fixed mold plate is attached;
A gate leading from the side of the end of the hot runner nozzle on the movable mold plate side to the side of the butt-forming cavity;
And a cooling path disposed to surround the cavity for forming a cylinder.
互いに型締めされて、合成樹脂製注射器のシリンダ成形用キャビティを形成するための固定型板及び可動型板と、
上記固定型板に固定されるコアと、
上記固定型板を取り付ける固定側取付板側から可動型板に向けて延びるエッジゲート型のホットランナノズルと、
ホットランナノズルの可動型板側の端部の側部から鍔部成形用キャビティの近傍の胴部成形用キャビティの側部に通ずるゲートと、
シリンダ成形用キャビティを取り囲んで配置される冷却経路と
を備えることを特徴とする合成樹脂製注射器シリンダの射出成形用金型。 A barrel molding cavity for molding a barrel for inserting a plunger, a ridge molding cavity for molding a ridge formed on an opening peripheral edge of a barrel rear end, and an injection formed on a barrel front end A cylinder forming cavity including a cylindrical protrusion forming cavity for forming a cylindrical protrusion for attaching a needle;
A stationary mold plate and a movable mold plate which are mutually clamped to form a cavity for molding a cylinder of a synthetic resin syringe;
A core fixed to the fixed template;
An edge gate type hot runner nozzle extending toward the movable mold plate from the fixed side mounting plate side to which the fixed mold plate is attached;
A gate passing from the side of the end of the hot runner nozzle on the movable mold plate side to the side of the body forming cavity near the buttocks forming cavity;
A cooling path disposed around the cylinder forming cavity and
A mold for injection molding of a synthetic resin syringe cylinder comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001366927A JP3496880B2 (en) | 2001-11-30 | 2001-11-30 | Mold and method for injection molding of a synthetic resin syringe cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001366927A JP3496880B2 (en) | 2001-11-30 | 2001-11-30 | Mold and method for injection molding of a synthetic resin syringe cylinder |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003354074A Division JP2004041776A (en) | 2003-10-14 | 2003-10-14 | Syringe cylinder made of synthetic resin |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2002225095A JP2002225095A (en) | 2002-08-14 |
| JP3496880B2 JP3496880B2 (en) | 2004-02-16 |
| JP2002225095A5 true JP2002225095A5 (en) | 2004-08-12 |
Family
ID=19176760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001366927A Expired - Fee Related JP3496880B2 (en) | 2001-11-30 | 2001-11-30 | Mold and method for injection molding of a synthetic resin syringe cylinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3496880B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4818752B2 (en) * | 2006-02-24 | 2011-11-16 | テルモ株式会社 | Injection molding die for outer cylinder for syringe, manufacturing method for outer cylinder for syringe, outer cylinder for syringe and prefilled syringe |
| JP5307976B2 (en) * | 2006-08-22 | 2013-10-02 | 池上金型工業株式会社 | Injection mold |
| JP4881680B2 (en) * | 2006-09-11 | 2012-02-22 | 池上金型工業株式会社 | Injection mold and molded product with synthetic resin cage |
| JP6615040B2 (en) * | 2015-12-16 | 2019-12-04 | 不二精機株式会社 | Cylinder molding die and cylinder molding method using the same |
-
2001
- 2001-11-30 JP JP2001366927A patent/JP3496880B2/en not_active Expired - Fee Related
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