JPS61254318A - Manufacture of molded part with outer tubular fitting - Google Patents

Manufacture of molded part with outer tubular fitting

Info

Publication number
JPS61254318A
JPS61254318A JP9749185A JP9749185A JPS61254318A JP S61254318 A JPS61254318 A JP S61254318A JP 9749185 A JP9749185 A JP 9749185A JP 9749185 A JP9749185 A JP 9749185A JP S61254318 A JPS61254318 A JP S61254318A
Authority
JP
Japan
Prior art keywords
mold
outer cylindrical
metal fitting
cylindrical metal
split mold
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
Application number
JP9749185A
Other languages
Japanese (ja)
Other versions
JPH0234303B2 (en
Inventor
Hirotoshi Yamamuro
山室 博俊
Hisaki Otsubo
大坪 久樹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyoda Gosei Co Ltd
Original Assignee
Toyoda Gosei Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyoda Gosei Co Ltd filed Critical Toyoda Gosei Co Ltd
Priority to JP9749185A priority Critical patent/JPS61254318A/en
Publication of JPS61254318A publication Critical patent/JPS61254318A/en
Publication of JPH0234303B2 publication Critical patent/JPH0234303B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/1418Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To obtain a molded part, which is favorable in yield and for the surface to be finished later and has few flash, by a method wherein an enclosed space surrounded by a first split mold, a second split mold and the inner peripheral surface of an outer tubular fitting is formed by elastically deforming the outer tubular fitting in such a manner that both the end surfaces of the outer tubular fitting are pressed by the first abutting surface of the first split mold and by the second abutting surface of the second split mold and, after that, raw material is poured in the enclosed space. CONSTITUTION:Firstly, an outer tubular fitting 5 is placed in the cavity of a molding tool 1 and, after that, the molding tool 1 is closed. At that time, one end surface 50 of the outer tubular fitting 5 is pressed by a first abutting surface 26 and, at the same time, the other end surface 51 of the outer tubular fitting 5 is pressed by a second abutting surface 34. As a result, the peripheral wall of the outer tubular fitting 5 is curved so as to position its central portion outwards in order to form an enclosed space 6 surrounded by a first split mold 2, a second split mold 3 and the inner peripheral suface of the outer tubular fitting 5. Secondly, un-vulcanized compounded rubber is poured through the inlet of the first split mold 2 into the enclosed space 6. The poured un-vulcanized compounded rubber is vulcanized and solidified by the heat transmitted from the molding tool 1 heated up to high temperature so as to from a rubber molded part 7 with the outer cylindrical fitting 5.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は外筒金具をもつ成形品の製造方法に関する。本
発明は例えば、自動車に用いられるエンジンマウントの
インシュレータやゴムブツシュなどの製造方法に利用す
ることができる。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a molded product having an outer cylindrical metal fitting. The present invention can be used, for example, in a method for manufacturing engine mount insulators and rubber bushings used in automobiles.

[従来の技術] 外筒金具をもつゴム成形品の製造方法は、一般に、該外
筒金具を成形型内に配置し、該成形型を型締めする工程
、咳成形型内に未加硫配合ゴムを注入して固化すること
により外筒金具をもつゴム成形品を形成する工程、その
後、成形型を型開きして外筒金具をもつゴム成形品を成
形型から取り出す工程とを順に実施することにより行な
っていた。ここで前記成形型では、成形型の型締めの際
のがじり防止対策として、成形型のうち該外筒金具を配
置する部位を、外筒金具の寸法よりも若干大きめに設定
していた。
[Prior Art] A method for manufacturing a rubber molded product having an outer cylindrical metal fitting generally includes a step of placing the outer cylindrical metal fitting in a mold and clamping the mold, and placing an unvulcanized compound in the cough mold. A step of forming a rubber molded product with an outer cylindrical fitting by injecting and solidifying rubber, and then a step of opening the mold and taking out the rubber molded product with the outer cylindrical fitting from the mold are carried out in sequence. This was done by doing this. Here, in the above-mentioned mold, as a measure to prevent the mold from twisting when the mold is clamped, the part of the mold where the outer cylindrical fitting is placed is set to be slightly larger than the dimensions of the outer cylindrical fitting. .

[発明が解決しようとする問題点] 上記した成形型を用いた製造方法では、未加硫配合ゴム
を成形型内に注入する際に、咳未加硫配合ゴムが外筒金
具の両端面と成形型の型面とのわずかの隙間から漏れ出
たり、更にはこの隙間から漏れ出た未加硫配合ゴムが成
形型の型割面にも流出したりすることがあり、その結果
パリが多くなる。このようにパリが多いと歩留り、後仕
上げの面で不利である。
[Problems to be Solved by the Invention] In the manufacturing method using the mold described above, when the unvulcanized compounded rubber is injected into the mold, the unvulcanized compounded rubber contacts both end surfaces of the outer cylindrical metal fitting. Unvulcanized compounded rubber may leak from a small gap between the mold surface and the mold surface, and unvulcanized compound rubber that leaks from this gap may also leak onto the mold surface, resulting in a large amount of debris. Become. If there is a large amount of paris, it is disadvantageous in terms of yield and post-finishing.

本発明は、上記した問題点を解決するためになされたも
のであり、その目的は、パリが少なく、歩留りや後仕上
げの面で有利な成形品を得る、外筒金具をもつ成形品の
製造方法を提供するにある。
The present invention has been made in order to solve the above-mentioned problems, and its purpose is to manufacture a molded product with an outer cylindrical fitting that has less flaking and is advantageous in terms of yield and post-finishing. We are here to provide you with a method.

[問題点を解決するための手段] 本発明にかかる製造方法は、外筒金具の一端面と当接す
る第1当接型面をもつ第1分割型と、該外筒金具の他端
面と当接する第2当接型面をもつ第2分割型とをもつ成
形型を用い、該外筒金具を該成形型内に配置し、該成形
型を型締めすることにより、該外筒金具の両端面を該第
1当接型面および該第2当接型面で押圧し、該外筒金具
の周壁を弾性変形させて湾曲させ、湾曲した該外筒金具
の両端面と第1当接型面及び第2当接型面との間をシー
ルするとともに、該第1分割型、該第2分割型及び該外
筒金具の内周面で囲まれた密封空間を形成する工程、 該成形型の該密封空間に原材料を注入し、固化すること
により、該外筒金具をもつ成形品を形成する工程、 その後、咳成形型を型開きして該成形品を取り出す工程
とを順に実施することを特徴とするものである。
[Means for Solving the Problems] The manufacturing method according to the present invention includes: a first split mold having a first contact mold surface that contacts one end surface of the outer cylindrical metal fitting; and a first split mold that abuts the other end surface of the outer cylindrical metal fitting. By using a mold having a second split mold having a second abutting mold surface in contact with each other, placing the outer cylindrical fitting in the mold, and clamping the mold, both ends of the outer cylindrical fitting are The surface is pressed by the first abutting mold surface and the second abutting mold surface, the peripheral wall of the outer cylindrical metal fitting is elastically deformed and curved, and both end surfaces of the curved outer cylindrical metal fitting and the first abutting mold surface are pressed together. a step of sealing between the surface and the second abutting mold surface and forming a sealed space surrounded by the first divided mold, the second divided mold, and the inner circumferential surface of the outer cylindrical metal fitting; A step of injecting the raw material into the sealed space and solidifying it to form a molded product having the outer cylindrical metal fitting, and then a step of opening the cough mold and taking out the molded product are carried out in order. It is characterized by:

本発明にかかる製造方法で用いる成形型は、第1分割型
と第2分割型とをもつ。第1分割型は、外筒金具の一端
面と当接する第1当接型面をもつ。
The mold used in the manufacturing method according to the present invention has a first divided mold and a second divided mold. The first split mold has a first contact mold surface that contacts one end surface of the outer cylinder fitting.

第2分割型は、外筒金具の他端面と当接する第2当接型
而をもつ。ここで外筒金具の一端面および他端面とは、
外筒金具の軸方向の両端面の各端面という意味である。
The second split mold has a second abutting mold that abuts the other end surface of the outer cylindrical metal fitting. Here, one end surface and the other end surface of the outer cylinder metal fitting are
It means each end face of both end faces in the axial direction of the outer cylindrical metal fitting.

外筒金具は、湾曲させるため弾性変形し得る材料で形成
する必要がある。このような材料としては、鉄鋼などの
金属材料がある。
The outer cylindrical metal fitting needs to be made of a material that can be elastically deformed in order to be curved. Such materials include metal materials such as steel.

この外筒金具は一般に円筒形状をなしている。外筒金具
の周壁の厚みは、外筒金具の材質、成形型の型締力、要
求されるシール度合等の周囲に応じて適宜設定する。
This outer cylindrical metal fitting generally has a cylindrical shape. The thickness of the peripheral wall of the outer cylindrical metal fitting is appropriately set depending on the surroundings such as the material of the outer cylindrical metal fitting, the clamping force of the mold, and the degree of sealing required.

成形品の形状を規定する第1分割型、第2分割型の型面
は、通常、それぞれ第1当接面、第2当接面で囲まれた
範囲内に形成されている。第1分割型は一般に1個で形
成されるが、場合によっては複数個でもよい。同様に第
2分割型も一般に1個で形成されるが、場合によっては
複数個でもよい。なお成形型は一般に油圧シリンダなど
の駆動源に接続されており、該駆動源を駆動することに
よって、型開きや型締めを行ない得るようになっている
The mold surfaces of the first divided mold and the second divided mold that define the shape of the molded product are usually formed within a range surrounded by the first abutment surface and the second abutment surface, respectively. Generally, the first split mold is formed in one piece, but in some cases, it may be formed in plural pieces. Similarly, the second split mold is generally formed in one piece, but may be formed in plural pieces depending on the case. The mold is generally connected to a drive source such as a hydraulic cylinder, and by driving the drive source, the mold can be opened and closed.

本発明の製造方法では、ます外筒金具を成形型内のキャ
ビディに配置する。この場合外筒金具は第1分割型、第
2分割型のいずれに配置してもよい。成形品の種類によ
っては、例えば成形品がゴムブツシュの場合には、外筒
金具の他に内筒金具を成形型内に配置してもよい。
In the manufacturing method of the present invention, the outer cylindrical metal fitting is placed in a cavity within the mold. In this case, the outer cylindrical metal fitting may be placed in either the first divided mold or the second divided mold. Depending on the type of molded product, for example, if the molded product is a rubber bushing, an inner cylindrical metal fitting may be placed in the mold in addition to the outer cylindrical metal fitting.

このように外筒金具を配置したら、該成形型を型締めす
ることにより、外筒金具の一端面を第1当接型面で押圧
するとともに、該外筒金具の他端面を第2当接型面で押
圧する。即ち外筒金具を、これの軸方向の両側から押圧
する。型締め速度は、始動時から型締め完了時まで一様
の速度で行なってもよい。また場合によっては、型締め
完了時直前に型締め速度が低下するようにしてもよい。
After the outer cylindrical metal fitting is arranged in this way, by clamping the mold, one end surface of the outer cylindrical metal fitting is pressed by the first abutting mold surface, and the other end surface of the outer cylindrical fitting is pressed against the second abutting mold surface. Press with the mold surface. That is, the outer cylindrical metal fitting is pressed from both sides in the axial direction. The mold clamping speed may be constant from the time of start to the time of completion of mold clamping. In some cases, the mold clamping speed may be reduced immediately before mold clamping is completed.

このようにすれば型締めの際の外筒金具の損傷などを抑
制することができる。
In this way, damage to the outer cylinder fitting during mold clamping can be suppressed.

上記のように外筒金具の両端面を押圧すると、外筒金具
の周壁は弾性変形してわずかに湾曲する。
When both end surfaces of the outer cylindrical metal fitting are pressed as described above, the peripheral wall of the outer cylindrical metal fitting is elastically deformed and slightly curved.

この場合外筒金具の周壁は該外筒金具の周壁の内側に湾
曲しても、外側へ湾曲してもよい。このように外筒金具
が弾性変形した状態では、弾性変形に伴なう外筒金具の
復元力によって、外筒金具の一端面と第1当接型面との
間はシールされるとともに、外筒金具の他端面と第2当
接型面との間もシールされる。このようなシールの結果
、第1分割型、第2分割型及び外筒金具の内周面で囲ま
れた密封空間が形成される。なお密封空間は、該密封空
間内に原材料を注入するスプル一孔等に連通している。
In this case, the peripheral wall of the outer cylindrical metal fitting may be curved inwardly or outwardly. In this state where the outer cylindrical metal fitting is elastically deformed, the restoring force of the outer cylindrical metal fitting due to the elastic deformation creates a seal between the one end surface of the outer cylindrical metal fitting and the first contact mold surface, and A seal is also formed between the other end surface of the cylindrical metal fitting and the second abutting die surface. As a result of such sealing, a sealed space surrounded by the first split mold, the second split mold, and the inner peripheral surface of the outer cylinder fitting is formed. Note that the sealed space communicates with a sprue hole and the like through which raw materials are injected into the sealed space.

なお外筒金具の両端面を、該外筒金具の周壁の外面に向
かうにつれて該外筒金具の軸方向の長さが大きくなるよ
うなテーバ面としてもよい。この場合には、第1当接型
面、第2当接型面もこのテーバ面に対応する形状とする
。このような構成とすれば、第1分割型、第2分割型を
型締めした際に、楔の原理によってそれだけ外筒金具の
周壁は側方へ湾曲し易くなる。
Note that both end surfaces of the outer cylindrical metal fitting may be tapered surfaces such that the axial length of the outer cylindrical metal fitting increases toward the outer surface of the peripheral wall of the outer cylindrical metal fitting. In this case, the first abutting die surface and the second abutting die surface are also shaped to correspond to this Taber surface. With such a configuration, when the first split mold and the second split mold are clamped, the peripheral wall of the outer cylindrical metal fitting is more likely to curve laterally due to the wedge principle.

上記したように密封空間を形成したら、次に成形型に形
成された注入孔から原材料を密封空間内に注入し、該密
封空間を原材料で埋める。注入する原材料は未加硫配合
ゴムや樹脂などが代表的なものである。注入した原材料
が固化すると、固化した原材料と外筒金具とが一体的に
結着し、これにより外筒金具をもつ成形品が形成される
。なお注入した原材料が未加硫配合ゴムの場合には、一
般に成形型を加硫温度まで加熱することにより原材料の
固化を行なう。
Once the sealed space is formed as described above, the raw material is then injected into the sealed space through the injection hole formed in the mold to fill the sealed space with the raw material. Typical raw materials to be injected include unvulcanized compounded rubber and resin. When the injected raw material solidifies, the solidified raw material and the outer cylindrical metal fitting are integrally bonded, thereby forming a molded product having the outer cylindrical metal fitting. If the injected raw material is unvulcanized compounded rubber, the raw material is generally solidified by heating the mold to the vulcanization temperature.

次に、成形型を型開きして該成形品を成形型から取り出
す。成形品の取り出しは、一般に押出ビンを作動させる
ことにより行なう。
Next, the mold is opened and the molded product is taken out from the mold. The molded product is generally removed by operating an extrusion bottle.

なお成形品がゴムブツシュなどである場合には、外筒金
具をもつ成形品を成形型から取り出したら、軸方向のバ
ネ定数、軸直角方向のバネ定数などを改善するために、
一般に、外筒金具の径が小さくなるように該成形品を治
具によって絞る。
If the molded product is a rubber bushing, etc., once the molded product with the outer cylindrical fitting is removed from the mold, in order to improve the spring constant in the axial direction, the spring constant in the direction perpendicular to the axis, etc.
Generally, the molded product is squeezed with a jig so that the diameter of the outer cylindrical metal fitting is reduced.

[発明の効果] 本発明にかかる製造方法によれば、外筒金具の両端面を
第1分割型の第1当接型面及び第2分割型の第2当接型
面で押圧して外筒金具を弾性変形させることにより、第
1分割型、第2分割型及び外筒金具の内周面で囲まれた
密封空間を形成し、この密封空間内に原材料を注入する
構成である。
[Effects of the Invention] According to the manufacturing method of the present invention, both end surfaces of the outer cylindrical metal fitting are pressed by the first abutting die surface of the first split mold and the second abutting die surface of the second split mold, and the outer cylindrical fitting is pushed out. By elastically deforming the cylindrical metal fitting, a sealed space surrounded by the first split mold, the second split mold, and the inner peripheral surface of the outer cylindrical metal fitting is formed, and the raw material is injected into this sealed space.

従って成形の際に、外筒金具の一端面と第1当接型面と
の間から原材料が漏れることを未然に防止することがで
き、同様に外筒金具の他端面と第2当接型面との間から
原材料が漏れることを未然に防止することができる。従
って従来に比べてパリの発生を抑えることができる。そ
のため歩留りの向上、後仕上げ工程の簡略化あるいは省
略を図ることができる。
Therefore, during molding, it is possible to prevent the raw material from leaking between the one end surface of the outer cylindrical metal fitting and the first abutting mold surface, and similarly, it is possible to prevent the raw material from leaking between the other end surface of the outer cylindrical metal fitting and the second abutting mold surface. It is possible to prevent raw materials from leaking between the surfaces. Therefore, the occurrence of paris can be suppressed compared to the conventional method. Therefore, it is possible to improve the yield and simplify or omit the post-finishing process.

[実施例] 図面は本発明にかかる製造方法の1実施例を示す。第1
図は外筒金具を成形型内に配置した状態で成形型を型締
めした断面図であり、第2図は外筒金具を成形型内に配
置した状態で成形型を型締めする直前の断面図である。
[Example] The drawings show an example of the manufacturing method according to the present invention. 1st
The figure is a cross-sectional view of the mold with the outer cylindrical metal fitting placed inside the mold, and Figure 2 is a cross-sectional view of the mold just before the mold is clamped with the outer cylindrical metal fitting placed inside the mold. It is a diagram.

本実施例にかかる製造方法で用いる外筒金具5は円筒形
状をなしている。外筒金具5はSTKMllAから作製
されており、弾性変形しつるようになっている。外筒金
具5は、その軸方向の一端面50および他端面51をも
つ。
The outer cylindrical metal fitting 5 used in the manufacturing method according to this embodiment has a cylindrical shape. The outer cylindrical metal fitting 5 is made of STKMllA, and is elastically deformable so as to hang. The outer cylinder fitting 5 has one end surface 50 and the other end surface 51 in the axial direction.

この製造方法で用いる成形型1は、第1分割型2と第2
分割型3とをもつ。第1分割型2は、ランナ一孔21及
び図示しない注入孔が形成された上型20と、ランナ一
孔21に連通ずるスプル一孔22が形成された中型23
とをもつ。なおランナ一孔21は上型20と中型23と
の型割面に形成されている。スプル一孔22は中型23
を貫通して型開き方向とほぼ平行に形成されている。こ
のスプル一孔22はキャビティ4に向かうにつれて順次
径小となるように形成されており、先端部22aが最も
小径とされている。中型23は突出部25をもつ。突出
部25の端部25aは円弧状曲面とされている。更に端
部25aの外側には、外筒金具5の一端面50と当接す
る第1当接型面26が形成されている。第1当接型面2
6は図示しないがリング状をなしている。
The mold 1 used in this manufacturing method consists of a first split mold 2 and a second split mold 2.
It has a split type 3. The first split mold 2 includes an upper mold 20 in which a runner hole 21 and an injection hole (not shown) are formed, and a middle mold 23 in which a sprue hole 22 communicating with the runner hole 21 is formed.
has. Note that the runner hole 21 is formed in the mold parting surfaces of the upper mold 20 and the middle mold 23. One sprue hole 22 is medium size 23
It is formed almost parallel to the mold opening direction, penetrating through the mold. This sprue hole 22 is formed so that its diameter becomes smaller as it goes toward the cavity 4, with the tip end 22a having the smallest diameter. The middle mold 23 has a protrusion 25 . The end 25a of the protrusion 25 has an arcuate curved surface. Furthermore, a first abutting mold surface 26 that comes into contact with one end surface 50 of the outer cylinder fitting 5 is formed on the outside of the end portion 25a. First contact mold surface 2
Although not shown, 6 has a ring shape.

第2分割型3は、中型30.31、下型32とをもつ。The second split mold 3 has a middle mold 30, 31 and a lower mold 32.

成形品の形状を規定するキャビティは中型23.30.
31、下型32との型割面に形成されている。下型32
は外筒金具5の他端面51と当接する第2当接型面34
をもつ。第2当接型面34は図示しないがリング状をな
している。型締め時の第1当接型面26と第2当接型面
34との間の寸法L1は、外筒金具5の軸方向の長さ寸
法L2よりも若干小さめにされている(Ll <12)
。下型32は突出部33をもつ。突出部33は突出部2
5と対応する形状をもち、これの端部33aは、円弧状
曲面とされている。
The cavity that defines the shape of the molded product is medium-sized 23.30.
31 and is formed on the mold parting surface with the lower mold 32. Lower mold 32
is the second contact mold surface 34 that comes into contact with the other end surface 51 of the outer cylinder fitting 5
have. Although not shown, the second abutting mold surface 34 has a ring shape. The dimension L1 between the first abutting mold surface 26 and the second abutting mold surface 34 during mold clamping is slightly smaller than the axial length dimension L2 of the outer cylinder fitting 5 (Ll < 12)
. The lower die 32 has a protrusion 33. The protrusion 33 is the protrusion 2
5, and the end portion 33a thereof is an arcuate curved surface.

さて本実施例にかかる製造方法では、まず、成形型1を
型開きした状態で第2図に示すように、外筒金具5を成
形型1のキャビティ内に配置する。
In the manufacturing method according to this embodiment, first, with the mold 1 opened, the outer cylindrical metal fitting 5 is placed in the cavity of the mold 1, as shown in FIG.

そして油圧シリンダ等を駆動して成形型1を型締めする
。すると外筒金具5の一端面50は第1当接型面26に
よって押圧され、かつ外筒金具5の他端面51は第2当
接型面34で押圧される。その結果、外筒金具1の周壁
は弾性変形し第1図に示すように中央部が外側に位置す
るように湾曲される。湾曲した状態では、外筒金具1の
一端面50と第1当接型而26との間はシールされると
ともに、該外筒金具1の他端面51と第2当接型面34
との間もシールされる。故に第1図に示すように、第1
分割型2、第2分割型3及び外筒金具5の内周面で囲ま
れた密封空間6が形成される。
Then, the mold 1 is clamped by driving a hydraulic cylinder or the like. Then, one end surface 50 of the outer cylindrical metal fitting 5 is pressed by the first abutting mold surface 26, and the other end surface 51 of the outer cylindrical metal fitting 5 is pressed by the second abutting mold surface 34. As a result, the peripheral wall of the outer cylindrical metal fitting 1 is elastically deformed and curved so that the center portion is located on the outside as shown in FIG. In the curved state, there is a seal between one end surface 50 of the outer tube fitting 1 and the first abutting mold surface 26, and a seal is formed between the other end surface 51 of the outer tube fitting 1 and the second abutting mold surface 34.
A seal will also be placed between the two. Therefore, as shown in Figure 1, the first
A sealed space 6 surrounded by the inner peripheral surfaces of the split mold 2, the second split mold 3, and the outer cylindrical fitting 5 is formed.

次に成形型1の第1分割型2の注入孔から原材料として
の未加硫配合ゴムを注入し、ランナ一孔21、スプル一
孔22を介して密封空間6内に未加硫配合ゴムを注入す
る。注入された未加硫配合ゴムは、高温に加熱された成
形型1から伝達される熱によって加硫されて固化する。
Next, unvulcanized compounded rubber as a raw material is injected from the injection hole of the first split mold 2 of the mold 1, and the unvulcanized compounded rubber is injected into the sealed space 6 through the runner hole 21 and the sprue hole 22. inject. The injected unvulcanized compounded rubber is vulcanized and solidified by the heat transmitted from the mold 1 heated to a high temperature.

この結果、外筒金具5をもつゴム成形品7が形成される
As a result, a rubber molded product 7 having an outer cylindrical metal fitting 5 is formed.

その後上型20と中型23との型割面を開いて、ランナ
一孔21にゴムが充填されて形成されたランナー、スプ
ル一孔22にゴムが充填されて形成されたスプルーを上
型20側に付着させるとともに、スプル一孔22の先端
部22aと成形品7とを分離する。次に中型23.30
,31を型開きし、図示しない押出ビンの押出によって
ゴム成形品7を取り出す。
After that, the upper mold 20 and the middle mold 23 are opened, and a runner formed by filling the runner hole 21 with rubber and a sprue formed by filling the sprue hole 22 with rubber are placed on the upper mold 20 side. At the same time, the tip 22a of the sprue hole 22 and the molded product 7 are separated. Next is medium size 23.30
, 31 are opened, and the rubber molded product 7 is taken out by extrusion using an extrusion bottle (not shown).

本実施例にかかる製造方法によれば、外筒金具5の一端
面50を第1当接型面26で押圧すると共に他端面51
を第2当接型面34で押圧し、外筒金具5を弾性変形さ
せることにより、密封空間6を形成し、この密封空間6
内に未加硫配合ゴムを注入する構成である。従って未加
硫配合ゴムを高圧で注入する場合であっても、外筒金具
5の一端面50と第1当接型面26との間から未加硫配
、合ゴムが漏れることも未然に防止することができる。
According to the manufacturing method according to this embodiment, one end surface 50 of the outer cylinder fitting 5 is pressed by the first abutting mold surface 26, and the other end surface 51
is pressed by the second abutting mold surface 34 to elastically deform the outer cylinder fitting 5 to form a sealed space 6.
The structure is such that unvulcanized compounded rubber is injected into the inside. Therefore, even when unvulcanized compounded rubber is injected under high pressure, leakage of the unvulcanized compounded rubber from between the one end surface 50 of the outer cylinder fitting 5 and the first contact mold surface 26 is prevented. It can be prevented.

同様に外筒金具5の他端面51と第2当接型面34との
間から未加硫配合ゴムが漏れることも未然に防止するこ
とができる。従って外筒金具5の外側の空間55に未加
硫配合ゴムが流れ出ることを防止でき、勿論、中型23
と中型30との型割面、中型23と中型31との型割面
、中型30と下型32との型割面、中型31と下型32
との型割面に未加硫配合ゴムが流れ出ることを防止でき
る。よって従来に比べてパリの発生を抑制することがで
き、歩留り、後仕上げ工程の面で有利となる。
Similarly, leakage of unvulcanized compounded rubber from between the other end surface 51 of the outer cylinder fitting 5 and the second abutting mold surface 34 can also be prevented. Therefore, it is possible to prevent the unvulcanized rubber compound from flowing out into the space 55 outside the outer cylinder fitting 5.
and the middle die 30, the middle die 23 and the middle die 31, the middle die 30 and the lower die 32, the middle die 31 and the lower die 32.
It is possible to prevent unvulcanized compounded rubber from flowing out onto the mold cutting surface. Therefore, generation of flakes can be suppressed compared to the conventional method, which is advantageous in terms of yield and post-finishing process.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明にかかる製造方法の1実施例を示し、第1
図は成形型内に外筒金具を配置し成形型を型締めした状
態を示す断面図であり、第2図は成形型内に外筒金具を
配置し成形型を型締めする直前の断面図であり、第3図
は外筒金具をもつゴム成形品の斜視図である。 図中、1は成形型、2は第1分割型、3は第2分割型、
5は外筒金具、50は外筒金具の一端面、51は外筒金
具の他端面、6は密封空間、7は成形品、26は第1当
接型面、34は第2当接型面をそれぞれ示す。
The drawings show one embodiment of the manufacturing method according to the present invention.
The figure is a sectional view showing a state in which the outer cylindrical metal fitting is placed in the mold and the mold is clamped, and Figure 2 is a sectional view just before the outer cylindrical metal fitting is placed in the mold and the mold is clamped. FIG. 3 is a perspective view of a rubber molded product having an outer cylindrical metal fitting. In the figure, 1 is a mold, 2 is a first split mold, 3 is a second split mold,
5 is an outer cylindrical metal fitting, 50 is one end surface of the outer cylindrical metal fitting, 51 is the other end surface of the outer cylindrical metal fitting, 6 is a sealed space, 7 is a molded product, 26 is a first abutting mold surface, and 34 is a second abutting mold. Each side is shown.

Claims (2)

【特許請求の範囲】[Claims] (1)外筒金具の一端面と当接する第1当接型面をもつ
第1分割型と、該外筒金具の他端面と当接する第2当接
型面をもつ第2分割型とをもつ成形型を用い、該外筒金
具を該成形型内に配置し、該成形型を型締めすることに
より、該外筒金具の両端面を該第1当接型面および該第
2当接型面で押圧し、該外筒金具の周壁を弾性変形させ
て湾曲させ、湾曲した該外筒金具の両端面と第1当接型
面及び第2当接型面との間をシールするとともに、該第
1分割型、該第2分割型及び該外筒金具の内周面で囲ま
れた密封空間を形成する工程、 該成形型の該密封空間に原材料を注入し、固化すること
により、該外筒金具をもつ成形品を形成する工程、 その後、該成形型を型開きして該成形品を取り出す工程
とを順に実施することを特徴とする外筒金具をもつ成形
品の製造方法。
(1) A first split mold having a first contact mold surface that comes into contact with one end surface of the outer cylindrical metal fitting, and a second split mold that has a second contact mold surface that comes into contact with the other end surface of the outer cylindrical metal fitting. By using a mold with a mold, placing the outer cylindrical metal fitting in the mold, and clamping the mold, both end surfaces of the outer cylindrical metal fitting are brought into contact with the first abutting mold surface and the second abutting mold surface. Pressing with the mold surface to elastically deform and curve the peripheral wall of the outer cylindrical metal fitting, and sealing between both end surfaces of the curved outer cylindrical metal fitting and the first abutting mold surface and the second abutting mold surface. , forming a sealed space surrounded by the first split mold, the second split mold, and the inner circumferential surface of the outer cylindrical metal fitting; injecting a raw material into the sealed space of the mold and solidifying it; A method for manufacturing a molded article having an outer cylindrical metal fitting, comprising: forming a molded article having the outer cylindrical metal fitting; and then opening the mold and taking out the molded item.
(2)第1分割型、第2分割型の型面はそれぞれ第1当
接面、第2当接面で囲まれた範囲内に形成されている特
許請求の範囲第1項記載の外筒金具をもつ成形品の製造
方法。
(2) The outer cylinder according to claim 1, wherein the mold surfaces of the first split mold and the second split mold are formed within a range surrounded by the first contact surface and the second contact surface, respectively. A method for manufacturing molded products with metal fittings.
JP9749185A 1985-05-07 1985-05-07 Manufacture of molded part with outer tubular fitting Granted JPS61254318A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9749185A JPS61254318A (en) 1985-05-07 1985-05-07 Manufacture of molded part with outer tubular fitting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9749185A JPS61254318A (en) 1985-05-07 1985-05-07 Manufacture of molded part with outer tubular fitting

Publications (2)

Publication Number Publication Date
JPS61254318A true JPS61254318A (en) 1986-11-12
JPH0234303B2 JPH0234303B2 (en) 1990-08-02

Family

ID=14193740

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9749185A Granted JPS61254318A (en) 1985-05-07 1985-05-07 Manufacture of molded part with outer tubular fitting

Country Status (1)

Country Link
JP (1) JPS61254318A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH039813U (en) * 1989-06-15 1991-01-30
JPH0578525U (en) * 1992-03-31 1993-10-26 ぺんてる株式会社 Injection mold equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH039813U (en) * 1989-06-15 1991-01-30
JPH0578525U (en) * 1992-03-31 1993-10-26 ぺんてる株式会社 Injection mold equipment

Also Published As

Publication number Publication date
JPH0234303B2 (en) 1990-08-02

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