JPH04331120A - Injection molding die - Google Patents
Injection molding dieInfo
- Publication number
- JPH04331120A JPH04331120A JP9514491A JP9514491A JPH04331120A JP H04331120 A JPH04331120 A JP H04331120A JP 9514491 A JP9514491 A JP 9514491A JP 9514491 A JP9514491 A JP 9514491A JP H04331120 A JPH04331120 A JP H04331120A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- runner
- die
- flow direction
- shaped
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 36
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 239000012778 molding material Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
- B29C2045/2709—Gates with a plurality of mould cavity inlets in close proximity
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は射出成形用金型に関する
。さらに詳しくは、タイヤ製造用ブラダなどの環状成形
品用の射出成形金型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to injection molds. More specifically, the present invention relates to an injection mold for an annular molded product such as a tire manufacturing bladder.
【０００２】0002
【従来の技術】たとえば前記ブラダを成形する射出成形
金型としては従来より図４に示されるものが用いられて
いる。2. Description of the Related Art For example, an injection mold shown in FIG. 4 has been used to mold the bladder.
【０００３】図４に示される金型は上下に開閉自在な上
金型１１および下金型１２ならびにそれらに収容される
中金型１３からなり、中金型１３の横方向周囲に環状の
型キャビティ１４が形成され、上金型１１中心上部のノ
ズル部１５に外部から成形用材料を供給するため材料入
口１６を有する射出成形金型である。The mold shown in FIG. 4 consists of an upper mold 11 and a lower mold 12 that can be opened and closed vertically, and a middle mold 13 housed therein. This is an injection molding mold in which a cavity 14 is formed and a material inlet 16 for supplying molding material from the outside to a nozzle portion 15 at the upper center of the upper mold 11.
【０００４】前記材料入口１６から型キャビティ１４ま
での材料流路すなわちランナー部は、図３に示されるご
とく、材料入口１６から下方に内径を増大させながら上
金型１１を貫通し上金型１１と中金型１３との界面にい
たるテーパ形状を有するスピンドル状ランナー部１０１
と、該スピンドル状ランナー部１０１ の下端を中心
とする円板のごとき面形状を有する膜状ランナー部１０
３ と、該膜状ランナー部１０３ の周縁部から下向き
に型キャビティ１４に連通する円周方向に連続したスリ
ット状ゲート１０５ とを有している。As shown in FIG. 3, the material flow path from the material inlet 16 to the mold cavity 14, that is, the runner section, passes through the upper mold 11 while increasing its inner diameter downward from the material inlet 16. A spindle-shaped runner portion 101 having a tapered shape reaching the interface between the inner mold 13 and the inner mold 13.
and a membrane-like runner part 10 having a disk-like surface shape centered on the lower end of the spindle-like runner part 101.
3, and a slit-shaped gate 105 that is continuous in the circumferential direction and communicates downward with the mold cavity 14 from the peripheral edge of the film-like runner portion 103.
【０００５】しかしながら、前記膜状ランナー部１０３
およびスリット状ゲート１０５ は周方向に連続して
いるため、型キャビティ１４容積に対するランナー部容
積の比率、言いかえれば製品重量に対する廃棄材料重量
の比率が高く、たとえば、製品がブラダのばあいその比
率は約３０％にもなり、材料損失が大きいという問題点
がある。However, the film-like runner portion 103
Since the slit-shaped gate 105 is continuous in the circumferential direction, the ratio of the volume of the runner part to the volume of the mold cavity 14, or in other words, the ratio of the weight of waste material to the weight of the product is high. For example, if the product is a bladder, the ratio is high. is about 30%, and there is a problem that material loss is large.
【０００６】[0006]
【発明が解決しようとする課題】本発明は前記従来の金
型における問題点に鑑みてなされたものであり、均質な
成形品がえられ、かつ廃棄材料重量が少ない射出成形金
型を提供することを目的とする。[Problems to be Solved by the Invention] The present invention has been made in view of the problems with the conventional molds, and it is an object of the present invention to provide an injection molding mold that can produce a homogeneous molded product and has a reduced weight of waste material. The purpose is to
【０００７】[0007]
【課題を解決するための手段】本発明により、上下に開
閉自在な上金型および下金型ならびにそれらに収容され
る中金型からなり、中金型の横方向周囲に環状の型キャ
ビティが形成され、上金型中心上部に外部から成形用材
料を供給するための材料入口を有する射出成形金型であ
って、材料入口から下方に上金型を貫通し上金型と中金
型との界面にいたるスピンドル状ランナー部と、スピン
ドル状ランナー部下端からの材料の流れ方向を横方向に
変える基部と、基部から横方向放射状にのびる複数の放
射状ランナー部と、周方向に実質的に等間隔に配置され
該放射状ランナー下流端からの材料の流れ方向を個別に
下向きに変えて型キャビティに導くピン状ゲート部とが
型締状態で形成される射出成形金型が提供される。[Means for Solving the Problems] The present invention comprises an upper mold and a lower mold that can be opened and closed vertically, and a middle mold housed therein, and has an annular mold cavity around the middle mold in the lateral direction. An injection mold having a material inlet for supplying molding material from the outside at the upper center of the upper mold. a spindle-shaped runner section extending to an interface of the spindle-shaped runner section, a base section that laterally changes the flow direction of the material from the lower end of the spindle-shaped runner section, and a plurality of radial runner sections that extend laterally radially from the base section, and a plurality of radial runner sections that are substantially equal in the circumferential direction. An injection mold is provided in which pin-shaped gate portions are arranged at intervals and individually change the flow direction of the material from the downstream end of the radial runner downward and guide the material into the mold cavity in a clamped state.
【０００８】前記金型においては、放射状ランナー部の
各々が分岐を有し、複数の下流端を有するもの、また前
記下流端の合計数が２４〜３２であるもの、さらにノズ
ル部の露出する外面に周方向、軸方向などの溝切込また
はフィンが形成されてなるものが好ましい。[0008] In the mold, each of the radial runner parts has a branch and a plurality of downstream ends, the total number of downstream ends is 24 to 32, and the outer surface of the nozzle part is exposed. Preferably, grooves or fins are formed in the circumferential direction, axial direction, etc.
【０００９】[0009]
【実施例】つぎに、本発明の金型を、実施例に基づき、
図面を参照してさらに詳細に説明する。[Example] Next, the mold of the present invention will be explained based on the example.
A more detailed explanation will be given with reference to the drawings.
【００１０】図１は本発明の金型において形成されるラ
ンナー部形状の例を示す斜視図であり、図２は本発明の
金型の一例を示す断面図である。FIG. 1 is a perspective view showing an example of the shape of a runner portion formed in a mold according to the present invention, and FIG. 2 is a sectional view showing an example of the mold according to the present invention.
【００１１】図２に示される本発明の金型は、上下に開
閉自在な上金型１１および下金型１２ならびにそれらに
収容される中金型１３からなり、中金型１３の横方向周
囲に環状の型キャビティ１４が形成され、上金型１１中
心上部のノズル部１５に外部から成形用材料を供給する
ため材料入口１６を有する射出成形金型であって、材料
入口１６から内径を増大させながら上金型１１を貫通し
上金型１１と中金型１３との界面にわたるテーパ形状を
有するスピンドル状ランナー部１と、スピンドル状ラン
ナー部１下端からの材料の流れ方向を横方向に変える基
部２と、図１に示されるように基部２から横方向放射状
にのびる複数の放射状ランナー部３と、周方向に実質的
に等間隔に配置され、外放射状ランナー部下流端４から
の材料の流れ方向を個別に下向きに変えて型キャビティ
１４に導くピン状ゲート部５とが型締状態で形成される
射出成形金型である。The mold of the present invention shown in FIG. 2 consists of an upper mold 11 and a lower mold 12 that can be opened and closed vertically, and a middle mold 13 housed therein. This is an injection molding mold in which an annular mold cavity 14 is formed and a material inlet 16 for supplying molding material from the outside to a nozzle part 15 at the upper center of an upper mold 11, and the inner diameter is increased from the material inlet 16. The spindle-shaped runner part 1 has a tapered shape that penetrates the upper mold 11 and spans the interface between the upper mold 11 and the middle mold 13 while changing the flow direction of the material from the lower end of the spindle-shaped runner part 1 to the lateral direction. a base 2 and a plurality of radial runner sections 3 extending laterally radially from the base 2 as shown in FIG. This is an injection mold in which a pin-shaped gate portion 5 that individually changes the flow direction downward and guides the flow into the mold cavity 14 is formed in a clamped state.
【００１２】図１に示される例においては、各放射状ラ
ンナー部３は、分岐を有しており、１本の放射状ランナ
ー部３から２本の下流端４に分かれ、各下流端４は個別
にピン状ゲート部５を経て型キャビティ１４にいたる。
各放射状ランナー部３の分岐の数および下流端４の数に
はとくに限定はなく、たとえば３本以上の下端を有する
ように分岐を有していてもよい。In the example shown in FIG. 1, each radial runner section 3 has a branch, and one radial runner section 3 is divided into two downstream ends 4, each downstream end 4 being individually separated. The mold cavity 14 is reached through the pin-shaped gate portion 5 . The number of branches and the number of downstream ends 4 of each radial runner part 3 are not particularly limited, and the radial runner part 3 may have branches such that it has three or more lower ends, for example.
【００１３】下流端４の合計数すなわちピン状ゲート部
５の数は製品としてえられる環状射出成形体にウェルド
マークが生じず射出成型時間に問題が生じない範囲であ
れば、できるだけ少ないほうが、廃棄物重量低減効果が
大きくなるので好ましい。ゴムは射出するあいだ中、ラ
ンナー部、ピンゲート部およびキャビティ部で流動抵抗
により発熱し加硫が進むので、抵抗が大きければゴム焼
けになり、ウェルドマークの影響が出てくる。ウェルド
マークが生じない範囲は、型キャビティ形状および寸法
、材料供給圧力および温度などによって変動するが、た
とえばタイヤ製造用ブラダなどのばあい、ピン状ゲート
部５を２４〜３２個またはそれ以上にするとウェルドマ
ークの発生を防止することができる。The total number of downstream ends 4, that is, the number of pin-shaped gate parts 5, is preferably as small as possible, as long as weld marks do not occur on the annular injection molded product obtained and problems do not occur in injection molding time. This is preferable because it increases the effect of reducing the weight of objects. During injection, rubber generates heat due to flow resistance in the runner section, pin gate section, and cavity section and vulcanization progresses, so if the resistance is large, the rubber will burn and weld marks will appear. The range in which weld marks do not occur varies depending on the mold cavity shape and dimensions, material supply pressure and temperature, etc., but for example, in the case of a bladder for tire manufacturing, if the number of pin-shaped gate parts 5 is 24 to 32 or more. The occurrence of weld marks can be prevented.
【００１４】なお、ピン状ゲート部５の数が少なすぎる
ばあいは成形条件を種々変化させてもウェルドマークの
発生を防止することが困難になるため、実用に適さなく
なる。そのような観点から、ピン状ゲート部５の数は１
２本以上であることが好ましい。It should be noted that if the number of pin-shaped gate portions 5 is too small, it will be difficult to prevent weld marks from occurring even if the molding conditions are variously changed, making it unsuitable for practical use. From such a point of view, the number of pin-shaped gate parts 5 is 1.
Preferably, there are two or more.
【００１５】多数のピン状ゲート部５を設けるばあいに
は、前述のように各放射状ランナー部３に分岐を設ける
構成とすることにより、材料の円滑な流動および一様な
分配ならびに金型の容易な製造が達成される。When a large number of pin-shaped gate portions 5 are provided, each radial runner portion 3 is configured to have branches as described above, thereby ensuring smooth flow and uniform distribution of the material as well as mold control. Easy manufacturing is achieved.
【００１６】また、ピン状ゲート部５は周方向に実質的
に等間隔をあけて、設けられる。Further, the pin-shaped gate portions 5 are provided at substantially equal intervals in the circumferential direction.
【００１７】前記スピンドル状ランナー部１、基部２、
放射状ランナー部３、下流端４およびピン状ゲート部５
の形状は材料の一様な流動および材料供給後の迅速で一
様な加熱が達成されるように設計される。[0017] The spindle-shaped runner part 1, the base part 2,
Radial runner section 3, downstream end 4 and pin-shaped gate section 5
The shape of is designed so that uniform flow of material and rapid and uniform heating after material feeding is achieved.
【００１８】たとえば、図２に示されるように、放射状
ランナー部３は底面が平坦（同一レベル）なフラットラ
ンナーであり、該底面は基部２の底面との関係において
も平坦で、それらは実質的に同一面上にある。このフラ
ットな構成により、材料だまりをなくして材料の均一な
流動を図り、一部材料の停滞を防ぐ。For example, as shown in FIG. 2, the radial runner section 3 is a flat runner whose bottom surface is flat (on the same level), and the bottom surface is also flat in relation to the bottom surface of the base section 2, and they are substantially flat. are on the same plane. This flat configuration eliminates material pools, ensures uniform flow of material, and prevents some material from stagnation.
【００１９】スピンドル状ランナー部１の下端における
材料流路断面積と、各放射状ランナー部３の上流端にお
ける材料流路断面積との関係については、放射状ランナ
ー部３の本数をＮとして、
Ｎ×（放射状部断面積）＞ １．０〜１．２ ×（スピ
ンドル部下端断面積）
の関係があることが好ましい。Regarding the relationship between the cross-sectional area of the material flow path at the lower end of the spindle-shaped runner section 1 and the cross-sectional area of the material flow path at the upstream end of each radial runner section 3, the number of radial runner sections 3 is N, and the relationship is expressed as N× (Cross-sectional area of radial portion)>1.0 to 1.2 x (Cross-sectional area of lower end of spindle) It is preferable that the relationship is as follows.
【００２０】放射状ランナー部合計断面積（左辺）が大
きすぎると、材料の熱入れ不足になる傾向があり、小さ
すぎると射出時間が大きくなる傾向や、射出圧力不足、
材料のゴム焼けになる傾向がある。If the total cross-sectional area of the radial runner section (left side) is too large, there is a tendency for the material to be heated insufficiently, and if it is too small, the injection time tends to increase, the injection pressure is insufficient,
There is a tendency for rubber burning of the material.
【００２１】前記のごときランナー部構成を採用した本
発明の金型は従来のものに比べスピンドル状部を除いた
部分の廃棄物重量を１／５以下に低減することができた
。The mold of the present invention employing the above-mentioned runner structure was able to reduce the weight of waste in the area excluding the spindle-shaped part to 1/5 or less compared to the conventional mold.
【００２２】さらに、図２に示される金型においては、
ノズル部１５の露出する外面に周方向のスリット（溝切
込またはフィン）６が形成されている。図示されていな
いが、たとえば送風機などを別途設け、スリット６に冷
却用空気をあてることにより、スピンドル状ランナー部
１の冷却が促進されるので、スピンドル状ランナー部１
の長さをたとえば１０〜２０％程度またはそれ以上短縮
することができ、また、未加硫ゴム部を画定できる。Furthermore, in the mold shown in FIG.
A circumferential slit (groove cut or fin) 6 is formed on the exposed outer surface of the nozzle portion 15 . Although not shown, cooling of the spindle-shaped runner part 1 is promoted by separately providing a blower or the like and applying cooling air to the slit 6.
The length can be reduced by, for example, about 10 to 20% or more, and an unvulcanized rubber portion can be defined.
【００２３】このように、本発明の金型は個別のピン状
ゲート部５が周方向に等間隔に設けられるので、図３に
示されるごとき全周で連通するゲートに比べ、偏流が生
じにくく、中金型位置が安定し、それによって製品寸法
制度が維持され、たとえば周方向に不均一な製品が生ず
ることが防止される。As described above, in the mold of the present invention, since the individual pin-shaped gate portions 5 are provided at equal intervals in the circumferential direction, drifting is less likely to occur compared to the gates that communicate all around the circumference as shown in FIG. , the middle mold position is stabilized, thereby maintaining product dimensional accuracy and preventing, for example, a circumferential non-uniform product.
【００２４】[0024]
【発明の効果】本発明の金型は、ウェルドマークや均一
性不良などを生ずることなく、ランナー部に残存する廃
棄物重量を大幅に少なくすることを可能にする。Effects of the Invention The mold of the present invention makes it possible to significantly reduce the weight of waste remaining in the runner portion without causing weld marks or poor uniformity.
【図１】本発明の金型において形成されるランナー部形
状の例を示す斜視図である。FIG. 1 is a perspective view showing an example of the shape of a runner portion formed in a mold of the present invention.
【図２】本発明の金型の一例を示す断面図である。FIG. 2 is a sectional view showing an example of the mold of the present invention.
【図３】従来の金型において形成されるランナー部形状
を示す斜視図である。FIG. 3 is a perspective view showing the shape of a runner portion formed in a conventional mold.
【図４】従来の金型を示す断面図である。FIG. 4 is a sectional view showing a conventional mold.
１ スピンドル状ランナー部 ２ 基部 ３ 放射状ランナー部 ４ 下流端 ５ ピン状ゲート部 1 Spindle-shaped runner part 2 Base 3 Radial runner part 4 Downstream end 5 Pin-shaped gate part
Claims (4)
ならびにそれらに収容される中金型からなり、中金型の
横方向周囲に環状の型キャビティが形成され、上金型中
心上部に外部から成形用材料を供給するための材料入口
を有する射出成形金型であって、材料入口から下方に上
金型を貫通し上金型と中金型との界面にいたるスピンド
ル状ランナー部と、スピンドル状ランナー部下端からの
材料の流れ方向を横方向に変える基部と、基部から横方
向放射状にのびる複数の放射状ランナー部と、周方向に
実質的に等間隔に配置され該放射状ランナー下流端から
の材料の流れ方向を個別に下向きに変えて型キャビティ
に導くピン状ゲート部とが型締状態で形成される射出成
形金型。Claim 1: Consists of an upper mold and a lower mold that can be opened and closed vertically, and a middle mold housed in them; an annular mold cavity is formed around the middle mold in the lateral direction; An injection molding mold having a material inlet for supplying molding material from the outside, the spindle-shaped runner part penetrating the upper mold downward from the material inlet and reaching the interface between the upper mold and the middle mold. a base portion that laterally changes the flow direction of material from the lower end of the spindle-shaped runner; a plurality of radial runner portions extending laterally radially from the base portion; An injection mold in which a pin-shaped gate part is formed in a clamped state to individually change the flow direction of material from the end downward and guide it into the mold cavity.
有し、複数の下流端を有する請求項１記載の金型。2. The mold of claim 1, wherein each of said radial runner sections has a branch and has a plurality of downstream ends.
る請求項１または２記載の金型。3. The mold according to claim 1, wherein the total number of downstream ends is 24 to 32.
またはフィンが形成されてなる請求項１、２または３記
載の金型。4. The mold according to claim 1, wherein a groove or a fin is formed on the exposed outer surface of the nozzle portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3095144A JPH0757507B2 (en) | 1991-04-25 | 1991-04-25 | Injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3095144A JPH0757507B2 (en) | 1991-04-25 | 1991-04-25 | Injection mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04331120A true JPH04331120A (en) | 1992-11-19 |
| JPH0757507B2 JPH0757507B2 (en) | 1995-06-21 |
Family
ID=14129610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3095144A Expired - Fee Related JPH0757507B2 (en) | 1991-04-25 | 1991-04-25 | Injection mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0757507B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017202680A (en) * | 2016-05-06 | 2017-11-16 | 株式会社プラモール精工 | Gate Bush |
| WO2019073586A1 (en) * | 2017-10-13 | 2019-04-18 | 株式会社プラモール精工 | Gate bush |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5990987A (en) * | 1982-11-16 | 1984-05-25 | 市光工業株式会社 | Method of producing printed circuit board using die punchingmachine |
| JPS59107222U (en) * | 1983-01-10 | 1984-07-19 | トーワ株式会社 | Mold equipment for resin molding of thin-walled annular resin molded products |
| JPS63132017A (en) * | 1986-09-16 | 1988-06-04 | サン コースト プラスチックス，インコーポレーティッド | Method and device for manufacturing thin plastic vessel |
| JPH0254518U (en) * | 1988-10-17 | 1990-04-19 |
-
1991
- 1991-04-25 JP JP3095144A patent/JPH0757507B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5990987A (en) * | 1982-11-16 | 1984-05-25 | 市光工業株式会社 | Method of producing printed circuit board using die punchingmachine |
| JPS59107222U (en) * | 1983-01-10 | 1984-07-19 | トーワ株式会社 | Mold equipment for resin molding of thin-walled annular resin molded products |
| JPS63132017A (en) * | 1986-09-16 | 1988-06-04 | サン コースト プラスチックス，インコーポレーティッド | Method and device for manufacturing thin plastic vessel |
| JPH0254518U (en) * | 1988-10-17 | 1990-04-19 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017202680A (en) * | 2016-05-06 | 2017-11-16 | 株式会社プラモール精工 | Gate Bush |
| WO2019073586A1 (en) * | 2017-10-13 | 2019-04-18 | 株式会社プラモール精工 | Gate bush |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0757507B2 (en) | 1995-06-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |