JP2015218872A - X ring molding die and x ring manufacturing method, and x ring - Google Patents

X ring molding die and x ring manufacturing method, and x ring Download PDF

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JP2015218872A
JP2015218872A JP2014105015A JP2014105015A JP2015218872A JP 2015218872 A JP2015218872 A JP 2015218872A JP 2014105015 A JP2014105015 A JP 2014105015A JP 2014105015 A JP2014105015 A JP 2014105015A JP 2015218872 A JP2015218872 A JP 2015218872A
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seal
ring
mold
molding
peripheral side
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佐々木　智章
Tomoaki Sasaki
智章 佐々木
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Nok Corp
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Nok Corp
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Abstract

PROBLEM TO BE SOLVED: To provide an X ring molding die that can avoid burrs formed at a parting surface thereof from coming on a seal surface of a seal lip, thereby ensuring the stability of seal, and also easily remove a product therefrom.SOLUTION: The molding die for molding an X ring with two seal lips provided on each of inner and outer peripheries thereof, comprises a cavity space, an outer peripheral side mold parting surface, and an inner peripheral side mold parting surface. In the cavity space, a seal surface molding portion for molding a seal surface that is set at the lip top end of each of the seal lips is provided in a part of the inner surface of the cavity. The outer peripheral side mold parting surface is placed at a position displaced to one side in an axial direction from the seal surface molding portion for molding the seal surface in an outer peripheral side seal lip on one side in an axial direction. The inner peripheral side mold parting surface is placed at a position displaced to the other side in an axial direction from the seal surface molding portion for molding the seal surface in an inner peripheral side seal lip on the other side in an axial direction.

Description

本発明は、シール技術に係る密封装置の一種であるＸリングの成形型および製造方法、ならびにＸリングに関する。   The present invention relates to an X-ring mold and manufacturing method, which is a kind of sealing device related to sealing technology, and an X-ring.

従来から図３（Ａ）に示すように、内外周それぞれに２つのシールリップ１１，１２，１３，１４を備える断面Ｘ字形のＸリング１０が知られており、このＸリング１０は、断面Ｏ字形のＯリングや断面角形の角リングと比較して、圧縮される箇所がリップ形状をしているため、図３（Ｂ）に示すように機器のシール部に装着されたときに発生する反力が小さいと云うと特徴があり、このように反力が小さいため、摺動用途で多用されている。   Conventionally, as shown in FIG. 3 (A), an X-ring 10 having an X-shaped cross section having two seal lips 11, 12, 13, and 14 on the inner and outer circumferences is known. Compared with a letter-shaped O-ring or a square ring with a square cross-section, the portion to be compressed has a lip shape, so that the reaction that occurs when it is attached to the seal part of the device as shown in FIG. There is a characteristic that the force is small, and since the reaction force is small in this way, it is frequently used in sliding applications.

このＸリング１０は成形型を用いて成形される。Ｘリング１０を成形する成形型としては、図４（Ａ）に示すようにＸリング１０の内外周のリップ頂点部１１ａ，１４ａに型割り面５１，５２を持つ段差割り構造の成形型５０と、図５（Ａ）に示すように内外周の凹み部１５，１６に型割り面５３，５４を持つセンター割り構造の成形型５０が知られている。   The X ring 10 is formed using a mold. As a mold for molding the X ring 10, as shown in FIG. 4 (A), a mold 50 having a level split structure having mold split surfaces 51 and 52 on the lip apex portions 11a and 14a on the inner and outer circumferences of the X ring 10; As shown in FIG. 5 (A), there is known a mold 50 having a center split structure having mold split surfaces 53 and 54 in recesses 15 and 16 on the inner and outer peripheries.

しかしながら、図４（Ａ）に示す段差割り構造の成形型５０を用いてＸリングを成形すると、図４（Ｂ）に示すようにリップ頂点部１１ａ，１４ａに型割り面５１，５２によるバリ１７が形成されるため、Ｘリング１０を径方向に圧縮して使用する際にシールリップ１１，１４のシール面１１ｂ，１４ｂにバリ１７がかかり、よってシール性が不安定となることがある。   However, when the X-ring is molded using the mold 50 having the step-splitting structure shown in FIG. 4A, the burrs 17 by the mold-splitting surfaces 51 and 52 are formed on the lip apexes 11a and 14a as shown in FIG. 4B. Therefore, when the X ring 10 is compressed in the radial direction, the burr 17 is applied to the seal surfaces 11b, 14b of the seal lips 11, 14, and the sealing performance may become unstable.

この点、図５（Ａ）に示すセンター割り構造の成形型５０によれば何れのシールリップ１１，１２，１３，１４のシール面１１ｂ，１２ｂ，１３ｂ，１４ｂにもバリ１７がかからないためシール性を安定させることができるが、このセンター割り構造の成形型５０によると所謂アンダーカットによる比較的大きな無理抜き部が形成されるため、図５（Ｂ）に示すように成形型５０から製品（Ｘリング１０）を外す（離型する）際に成形型５０に製品が引っ掛かり、よって成形型５０から製品を外しにくい等の課題がある。   In this regard, according to the mold 50 having the center split structure shown in FIG. 5A, the sealing surfaces 11b, 12b, 13b, and 14b of any of the seal lips 11, 12, 13, and 14 do not have the burr 17 so that the sealing property is achieved. However, according to the mold 50 having this center split structure, a relatively large unreasonable portion is formed by so-called undercut. Therefore, as shown in FIG. When the ring 10) is removed (released), there is a problem that the product is caught on the mold 50, and thus it is difficult to remove the product from the mold 50.

尚、本願出願人は先に下記特許文献１に掲載されたＸリング及びその成形型に係る発明を提案しているが、この先行技術では、Ｘリング成形後の離型の容易化を図るべく、Ｘリングの径の軸方向の中心線と断面の軸方向の中心線とを傾かせることを特徴としている。これに対し本発明では、Ｘリングの径の軸方向の中心線と断面の軸方向の中心線とを傾かせることは想定しておらず、よって両発明は互いに異なるものである。   The applicant of the present application has previously proposed the invention relating to the X ring and its mold described in Patent Document 1 below. However, in this prior art, in order to facilitate the release after the X ring molding. The axial center line of the diameter of the X ring and the axial center line of the cross section are inclined. On the other hand, in the present invention, it is not assumed that the axial center line of the diameter of the X ring and the axial center line of the cross section are inclined, so that the two inventions are different from each other.

実開平５−６１５６７号公報Japanese Utility Model Publication No. 5-61567

本発明は以上の点に鑑みて、成形型の型割り面によって形成されるバリがシールリップのシール面にかかることがなく、もってシールの安定性を確保することができ、しかも上記センター割り構造の成形型を用いる場合と比較して成形型から製品を外しやすいＸリングの成形型および製造方法ならびにＸリングを提供することを目的とする。   In view of the above, the present invention prevents the burrs formed by the mold splitting surface of the molding die from being applied to the seal surface of the seal lip, thereby ensuring the stability of the seal, and the center splitting structure. It is an object of the present invention to provide an X-ring mold and a manufacturing method, and an X-ring, in which a product can be easily removed from the mold as compared with the case of using the above-described mold.

上記目的を達成するため、本発明の請求項１によるＸリングの成形型は、内外周それぞれに２つのシールリップを備えるＸリングを成形する成形型であって、前記Ｘリングを成形するキャビティ空間と、前記キャビティ空間の外周側に配置される外周側型割り面と、前記キャビティ空間の内周側に配置される内周側型割り面とを備え、前記キャビティ空間は、前記各シールリップのリップ頂端部に設定されるシール面を成形するシール面成形部位を前記キャビティ空間の内面の一部に備え、前記外周側型割り面は、軸方向一方の外周側シールリップにおけるシール面を成形するシール面成形部位よりも軸方向一方にずれた位置に配置され、前記内周側型割り面は、軸方向他方の内周側シールリップにおけるシール面を成形するシール面成形部位よりも軸方向他方にずれた位置に配置されていることを特徴とする。   In order to achieve the above object, an X-ring mold according to claim 1 of the present invention is a mold for molding an X-ring having two seal lips on each of the inner and outer circumferences, and a cavity space for molding the X-ring. And an outer peripheral mold splitting surface disposed on the outer peripheral side of the cavity space, and an inner peripheral mold splitting surface disposed on the inner peripheral side of the cavity space, wherein the cavity space A seal surface molding portion for molding a seal surface set at the lip top end portion is provided in a part of the inner surface of the cavity space, and the outer peripheral side split surface forms a seal surface in one outer peripheral side seal lip in the axial direction. The seal surface molding part is arranged at a position shifted in one axial direction from the seal surface molding site, and the inner circumferential side split surface molds the seal surface in the other axially inner circumferential seal lip. Characterized in that it is arranged at a position displaced in the other axial than.

また、本発明の請求項２によるＸリングの製造方法は、上記した請求項１記載の成形型を用いてＸリングを成形することを特徴とする。   According to a second aspect of the present invention, there is provided a method for producing an X-ring, wherein the X-ring is formed using the mold according to the first aspect.

また、本発明の請求項３によるＸリングは、上記した請求項１記載の成形型を用いて成形されたことを特徴とする。   An X-ring according to claim 3 of the present invention is characterized by being molded using the molding die according to claim 1 described above.

上記構成を備える本発明においては、Ｘリングにおける軸方向一方の外周側シールリップおよび軸方向他方の内周側シールリップがそれぞれそのリップ頂端部にシール面を備えるものとされ、その一方で、成形型は、軸方向一方の外周側シールリップのシール面より軸方向一方にずれた位置に外周側型割り面を備えるとともに軸方向他方の内周側シールリップのシール面より軸方向他方にずれた位置に内周側型割り面を備えるものとされているため、外周側型割り面によって形成されるバリは外周側シールリップのシール面より軸方向一方にずれた位置に形成され、内周側型割り面によって形成されるバリは内周側シールリップのシール面より軸方向他方にずれた位置に形成される。したがってＸリングの内外周においてそれぞれシールリップのシール面からずれた位置にバリが形成されるため、シール面とバリの位置が重なってシール性が不安定となることがない。   In the present invention having the above-mentioned configuration, one outer circumferential side seal lip and the other inner circumferential side seal lip in the X ring each have a seal surface at the lip top end portion, on the other hand, molding The mold is provided with an outer peripheral mold splitting surface at a position offset in one axial direction from the seal surface of one outer peripheral seal lip in the axial direction, and shifted in the other axial direction from the seal surface of the other inner peripheral seal lip in the axial direction. The burr formed by the outer peripheral mold parting surface is formed at a position shifted in one axial direction from the seal surface of the outer peripheral side seal lip, and is provided on the inner peripheral side. The burr formed by the dividing surface is formed at a position shifted to the other side in the axial direction from the seal surface of the inner peripheral side seal lip. Accordingly, burrs are formed at positions deviated from the sealing surface of the seal lip on the inner and outer circumferences of the X ring, so that the sealing performance does not become unstable because the sealing surface and the position of the burrs overlap.

また、Ｘリングにおける軸方向一方の外周側シールリップおよび軸方向他方の内周側シールリップは、Ｘリングの断面形状において対角線上に配置されるものであって、この両シールリップに対し交差する位置に外周側型割り面および内周側型割り面が配置されているため、本発明の成形型は段差割り構造の成形型の範疇に属するものである。したがって段差割り構造の成形型はセンター割り構造の成形型と比較して成形型から製品を外しやすいため、本発明でもこのように成形型から製品を外しやすいと云う特性が維持される。   Further, one outer peripheral side seal lip in the X direction and the other inner peripheral side seal lip in the X ring are arranged diagonally in the cross-sectional shape of the X ring, and intersect with both the seal lips. Since the outer peripheral side mold parting surface and the inner peripheral side parting surface are arranged at the positions, the molding die of the present invention belongs to the category of the molding die having the step splitting structure. Therefore, since the mold having the step split structure is easier to remove the product from the mold than the mold having the center split structure, the present invention maintains the characteristic that the product is easily removed from the mold in this way.

本発明は、以下の効果を奏する。   The present invention has the following effects.

すなわち本発明においては以上説明したように、Ｘリングの内外周においてそれぞれシールリップのシール面からずれた位置にバリが形成されるため、シール面とバリの位置が重なってシール性が不安定となることがない。また、段差割り構造の成形型を用いるため、センター割り構造の成形型と比較して成形型から製品を外しやすい。したがって本発明所期の目的どおり、成形型の型割り面によって形成されるバリがシールリップのシール面にかかることがなく、もってシールの安定性を確保することができ、しかもセンター割り構造の成形型を用いる場合と比較して成形型から製品を外しやすいＸリングの成形型および製造方法ならびにＸリングを提供することができる。   That is, in the present invention, as described above, burrs are formed at positions deviated from the seal surface of the seal lip on the inner and outer peripheries of the X ring. Never become. In addition, since the mold having the step split structure is used, it is easier to remove the product from the mold compared to the mold having the center split structure. Therefore, as the intended purpose of the present invention, the burr formed by the split surface of the mold does not hit the seal surface of the seal lip, so that the stability of the seal can be secured and the center split structure is molded. It is possible to provide an X-ring mold and a manufacturing method, and an X-ring, in which a product can be easily removed from the mold as compared with a case where a mold is used.

（Ａ）は本発明の実施例に係る成形型により成形されるＸリングの要部断面図、（Ｂ）は同Ｘリングの装着状態を示す要部断面図(A) is principal part sectional drawing of X ring shape | molded with the shaping | molding die concerning the Example of this invention, (B) is principal part sectional drawing which shows the mounting state of the X ring. 同成形型の要部断面図Cross section of the main part of the same mold （Ａ）はＸリングの一般構造を示す要部断面図、（Ｂ）は同Ｘリングの装着状態を示す要部断面図(A) is a cross-sectional view of the main part showing the general structure of the X-ring, (B) is a cross-sectional view of the main part showing the mounting state of the X-ring （Ａ）は従来例に係る成形型の要部断面図、（Ｂ）は同成形型により成形されるＸリングの要部断面図(A) is a cross-sectional view of a main part of a mold according to a conventional example, and (B) is a cross-sectional view of a main part of an X-ring formed by the same mold. （Ａ）は他の従来例に係る成形型の要部断面図、（Ｂ）は同成形型における離型工程の説明図(A) is principal part sectional drawing of the shaping | molding die concerning another prior art example, (B) is explanatory drawing of the mold release process in the same shaping | molding die

つぎに本発明の実施例を図面にしたがって説明する。   Next, embodiments of the present invention will be described with reference to the drawings.

当該実施例は、図１（Ａ）に示すように内外周それぞれに２つ都合４つのシールリップ１１，１２，１３，１４を備える断面Ｘ字形のＸリング１０を図２に示す成形型２０を用いて成形するものである。   In this embodiment, as shown in FIG. 1 (A), an X-ring 10 having an X-shaped cross section having two seal lips 11, 12, 13, and 14 on each of the inner and outer peripheries is used as a molding die 20 shown in FIG. It is used to mold.

図１（Ａ）に示すようにＸリング１０は、所定のゴム状弾性体を材料として環状に成形され、断面中央にリング基部１８を備え、このリング基部１８に周りにそれぞれ環状を呈する４つのシールリップ１１，１２，１３，１４が放射状に一体成形されている。４つのシールリップ１１，１２，１３，１４としては、軸方向一方（図では上方）に設けられた第１外周側シールリップ１１、軸方向他方（図では下方）に設けられた第２外周側シールリップ１２、軸方向一方に設けられた第１内周側シールリップ１３および軸方向他方に設けられた第２内周側シールリップ１４の組み合わせよりなり、各シールリップ１１，１２，１３，１４の先端部は断面半円形（円弧形）とされている。   As shown in FIG. 1 (A), the X ring 10 is formed into an annular shape using a predetermined rubber-like elastic material, and has a ring base 18 at the center of the cross section. Seal lips 11, 12, 13, and 14 are integrally formed radially. The four seal lips 11, 12, 13, and 14 include a first outer peripheral side seal lip 11 provided on one side in the axial direction (upward in the figure) and a second outer peripheral side provided on the other side in the axial direction (lower in the figure). The seal lip 12 is composed of a combination of a first inner peripheral side seal lip 13 provided on one axial direction and a second inner peripheral side seal lip 14 provided on the other axial direction, and each of the seal lips 11, 12, 13, 14 The front end of each has a semicircular cross section (arc shape).

また、このＸリング１０は図１（Ｂ）に示すように、互いに径方向に対向する外周側部材３１および内周側部材４１のうち内周側部材４１の外周面４１ａに形成した環状の装着溝４２に装着されて径方向に圧縮されるものとされ、よって４つのシールリップ１１，１２，１３，１４のうち第１および第２外周側シールリップ１１，１２はそのリップ頂端部１１ａ，１２ａである外周端部にて外周側部材３１の内周面３１ａに密接し、第１および第２内周側シールリップ１３，１４はそのリップ頂端部１３ａ，１４ａである内周端部にて装着溝４２の底面４２ａに密接するものとされている。したがって第１および第２外周側シールリップ１１，１２はそのリップ頂端部１１ａ，１２ａである外周端部に相手部材（外周側部材３１）に密接するシール面１１ｂ，１２ｂを備え、第１および第２内周側シールリップ１３，１４はそのリップ頂端部１３ａ，１４ａである内周端部に相手部材（内周側部材４１）に密接するシール面１３ｂ，１４ｂを備えている。シール面１１ｂ，１２ｂ，１３ｂ，１４ｂはそれぞれ所定の軸方向幅を備えている。   In addition, as shown in FIG. 1B, the X ring 10 has an annular mounting formed on the outer peripheral surface 41a of the inner peripheral member 41 among the outer peripheral member 31 and the inner peripheral member 41 that are opposed to each other in the radial direction. It is assumed that it is mounted in the groove 42 and compressed in the radial direction, and therefore the first and second outer peripheral side seal lips 11, 12 out of the four seal lips 11, 12, 13, 14 are lip top ends 11 a, 12 a. The first and second inner peripheral side seal lips 13, 14 are attached at the inner peripheral end portions, which are the lip top end portions 13 a, 14 a, in close contact with the inner peripheral surface 31 a of the outer peripheral side member 31 at the outer peripheral end portion. The groove 42 is in close contact with the bottom surface 42a. Accordingly, the first and second outer peripheral side seal lips 11 and 12 are provided with seal surfaces 11b and 12b in close contact with the mating member (outer peripheral member 31) at the outer peripheral end portions of the lip top end portions 11a and 12a. 2 The inner peripheral side seal lips 13 and 14 are provided with seal surfaces 13b and 14b in close contact with the mating member (inner peripheral side member 41) at the inner peripheral end portions which are the lip top end portions 13a and 14a. Each of the seal surfaces 11b, 12b, 13b, and 14b has a predetermined axial width.

一方、成形型２０は図２に示すように、軸方向に分割された２つの分割型２１，２２を備え、両分割型２１，２２間にＸリング１０を成形するための環状のキャビティ空間２３を備えている。   On the other hand, as shown in FIG. 2, the mold 20 includes two split molds 21 and 22 divided in the axial direction, and an annular cavity space 23 for molding the X ring 10 between the split molds 21 and 22. It has.

また、このキャビティ空間２３の外周側に位置して軸直角状の外周側型割り面２４が形成されるとともにキャビティ空間２３の内周側に位置して同じく軸直角状の内周側型割り面２５が形成され、このうち前者の外周側型割り面２４は、キャビティ空間２３の内面における第１外周側シールリップ１１のシール面１１ｂを成形するシール面成形部位２３ａよりも軸方向一方（図では上方）にずれた位置にされ、後者の内周側型割り面２５は、キャビティ空間２３の内面における第２内周側シールリップ１４のシール面１４ｂを成形するシール面成形部位２３ｂよりも軸方向他方（図では下方）にずれた位置に配置されている。   Further, an outer peripheral mold parting surface 24 perpendicular to the axis is formed on the outer peripheral side of the cavity space 23, and an inner peripheral side parting surface that is also orthogonal to the axis is located on the inner peripheral side of the cavity space 23. 25, of which the former outer peripheral mold splitting surface 24 is axially one side (in the figure, more than the seal surface molding portion 23a for molding the seal surface 11b of the first outer peripheral seal lip 11 on the inner surface of the cavity space 23). The latter inner peripheral side split surface 25 is axially displaced from the seal surface forming portion 23b for forming the seal surface 14b of the second inner peripheral side seal lip 14 on the inner surface of the cavity space 23. It is arranged at a position shifted to the other side (downward in the figure).

上記構成を備える当該実施例においては、Ｘリング１０の軸方向一方に設けられた第１外周側シールリップ１１およびＸリング１０の軸方向他方に設けられた第２内周側シールリップ１４がそれぞれリップ頂端部１１ａ，１４ａである外周端部または内周端部にシール面１１ｂ，１４ｂを備えるものとされ、その一方で、成形型２０は、キャビティ空間２３の内面における第１外周側シールリップ１１のシール面１１ｂを成形するシール面成形部位２３ａより軸方向一方にずれた位置に外周側型割り面２４を備えるとともにキャビティ空間２３の内面における第２内周側シールリップ１４のシール面１４ｂを成形するシール面成形部位２３ｂより軸方向他方にずれた位置に内周側型割り面２５を備えるものとされているため、図１（Ａ）に示すように外周側型割り面２４によって形成されるバリ１７は第１外周側シールリップ１１のシール面１１ｂより軸方向一方にずれた位置に形成され、内周側型割り面２５によって形成されるバリ１７は第２内周側シールリップ１４のシール面１４ｂより軸方向他方にずれた位置に形成される。したがってＸリング１０の内外周においてそれぞれシールリップ１１，１４のシール面１１ｂ，１４ｂからずれた位置にバリ１７が形成されるため、シール面１１ｂ，１４ｂとバリ１７の位置が重なってシール性が不安定となるのを防止することができる。   In the embodiment having the above-described configuration, the first outer peripheral side seal lip 11 provided on one axial direction of the X ring 10 and the second inner peripheral side seal lip 14 provided on the other axial direction of the X ring 10 are respectively provided. The outer peripheral end or inner peripheral end, which is the lip top end portion 11a, 14a, is provided with the seal surfaces 11b, 14b. On the other hand, the molding die 20 has the first outer peripheral side seal lip 11 on the inner surface of the cavity space 23. The seal surface forming part 23a for forming the seal surface 11b is provided with an outer peripheral side split surface 24 at a position shifted in the axial direction and the seal surface 14b of the second inner peripheral side seal lip 14 on the inner surface of the cavity space 23 is formed. 1A is provided with an inner peripheral mold splitting surface 25 at a position shifted to the other axial direction from the seal surface molding part 23b to be performed. In this way, the burr 17 formed by the outer peripheral mold splitting surface 24 is formed at a position shifted in the axial direction from the seal surface 11 b of the first outer peripheral seal lip 11 and formed by the inner peripheral mold splitting surface 25. 17 is formed at a position shifted from the seal surface 14b of the second inner peripheral side seal lip 14 to the other in the axial direction. Therefore, since the burrs 17 are formed on the inner and outer peripheries of the X ring 10 at positions displaced from the seal surfaces 11b and 14b of the seal lips 11 and 14, respectively, the seal surfaces 11b and 14b and the burrs 17 are overlapped, resulting in poor sealing performance. It can prevent becoming stable.

また、Ｘリング１０の軸方向一方に設けられた第１外周側シールリップ１１およびＸリング１０の軸方向他方に設けられた第２内周側シールリップ１４は、Ｘリング１０の断面形状において対角線上に配置されるものであって、この両シールリップ１１，１４に対し交差する位置に外周側型割り面２４および内周側型割り面２５が配置されているため、当該実施例に係る成形型２０はセンター割り構造の成形型ではなく段差割り構造の成形型とされている。したがって段差割り構造の成形型はセンター割り構造の成形型と比較して成形型から製品を外しやすいため、当該成形方法においてもこのように成形型から製品を外しやすいと云う特性を維持することができる。   Further, the first outer peripheral side seal lip 11 provided on one axial direction of the X ring 10 and the second inner peripheral side seal lip 14 provided on the other axial direction of the X ring 10 are diagonal lines in the cross-sectional shape of the X ring 10. Since the outer peripheral mold parting surface 24 and the inner peripheral part splitting surface 25 are disposed at positions intersecting with both the seal lips 11, 14, the molding according to this embodiment is performed. The mold 20 is not a center split structure mold but a step split structure mold. Therefore, since the mold with the step split structure is easier to remove the product from the mold than the mold with the center split structure, the molding method can maintain the characteristic that the product can be easily removed from the mold in this way. it can.

したがって以上のことから本発明所期の目的どおり、成形型２０の型割り面２４，２５によって形成されるバリ１７がシールリップ１１，１４のシール面１１ｂ，１４ｂにかかることがなく、もってシールの安定性を確保することができ、しかもセンター割り構造の成形型を用いる場合と比較して成形型２０から製品を外しやすいＸリング１０の成形型２０および製造方法ならびにＸリング１０を提供することができる。   Therefore, as described above, as the intended purpose of the present invention, the burr 17 formed by the split surfaces 24 and 25 of the mold 20 does not hit the seal surfaces 11b and 14b of the seal lips 11 and 14, so It is possible to provide a molding die 20 and a manufacturing method of the X ring 10 that can ensure stability and can easily remove a product from the molding die 20 as compared with the case where a molding die having a center split structure is used, and the X ring 10. it can.

尚、当該実施例において、Ｘリング１０は図１（Ａ）に示したように、その径の軸方向の中心線０１と断面の軸方向の中心線０２とが傾いておらず、両中心線０１，０２は互いに平行とされている。また、成形型２０は図２に示したように、そのキャビティ空間２３の軸方向の中心線０３とキャビティ空間２３の断面の軸方向の中心線０４とが傾いておらず、両中心線０３，０４は互いに平行とされている。したがって本発明はこのように各中心線が平行であることを前提とするものである。 Incidentally, in the exemplary embodiments, X ring 10 as shown in FIG. 1 (A), not inclined with the center line 0 2 in the axial direction of the center line 0 1 and the cross section of the axial direction of the diameter, both The center lines 0 1 and 0 2 are parallel to each other. Further, the mold 20, as shown in FIG. 2, and are not inclined center line 0 4 an axial section of the axial centerline 0 3 and the cavity 23 of the cavity 23, both the center line 0 3 and 0 4 are parallel to each other. Therefore, the present invention is based on the premise that the center lines are parallel to each other.

また、本発明に係るＸリング１０が同じく本発明に係る成形型２０または製造方法によって成形されたものであることは、Ｘリング１０の内外周においてそれぞれシールリップ１１，１４のシール面１１ｂ，１４ｂからずれた位置にバリ１７（もしくは型割り痕）が形成されているため、本発明によらないＸリングに対し明瞭に識別することができる。したがってこのような理由からして本発明ではＸリングの成形型および製造方法のほかに、Ｘリングそのものを請求の範囲に加えたものである。   Further, the X ring 10 according to the present invention is also molded by the molding die 20 or the manufacturing method according to the present invention, so that the seal surfaces 11b and 14b of the seal lips 11 and 14 on the inner and outer circumferences of the X ring 10 respectively. Since the burrs 17 (or mold marks) are formed at positions deviated from the distance, it is possible to clearly identify the X-ring not according to the present invention. Therefore, for this reason, in the present invention, the X ring itself is added to the scope of claims in addition to the X ring mold and the manufacturing method.

１０ Ｘリング
１１，１２ 外周側シールリップ
１３，１４ 内周側シールリップ
１１ａ，１２ａ，１３ａ，１４ａ リップ頂端部
１１ｂ，１２ｂ，１３ｂ，１４ｂ シール面
１５，１６ 凹み部
１７ バリ
１８ 基部
２０ 成形型
２１，２２ 分割型
２３ キャビティ空間
２３ａ，２３ｂ シール面成形部位
２４ 外周側型割り面
２５ 内周側型割り面
３１ 外周側部材
３１ａ 内周面
４１ 内周側部材
４１ａ 外周面
４２ 装着溝
４２ａ 底面 10 X ring 11, 12 Outer peripheral side seal lip 13, 14 Inner peripheral side seal lip 11a, 12a, 13a, 14a Lip top end part 11b, 12b, 13b, 14b Seal surface 15, 16 Recessed part 17 Burr 18 Base 20 Mold 21 , 22 Split mold 23 Cavity space 23a, 23b Sealing surface forming part 24 Outer peripheral side split surface 25 Inner peripheral side split surface 31 Outer peripheral member 31a Inner peripheral surface 41 Inner peripheral member 41a Outer peripheral surface 42 Mounting groove 42a Bottom surface

Claims (3)

内外周それぞれに２つのシールリップを備えるＸリングを成形する成形型であって、
前記Ｘリングを成形するキャビティ空間と、前記キャビティ空間の外周側に配置される外周側型割り面と、前記キャビティ空間の内周側に配置される内周側型割り面とを備え、
前記キャビティ空間は、前記各シールリップのリップ頂端部に設定されるシール面を成形するシール面成形部位を前記キャビティ空間の内面の一部に備え、
前記外周側型割り面は、軸方向一方の外周側シールリップにおけるシール面を成形するシール面成形部位よりも軸方向一方にずれた位置に配置され、
前記内周側型割り面は、軸方向他方の内周側シールリップにおけるシール面を成形するシール面成形部位よりも軸方向他方にずれた位置に配置されていることを特徴とするＸリングの成形型。 A mold for molding an X-ring having two seal lips on each of the inner and outer circumferences,
A cavity space for molding the X ring, an outer peripheral mold splitting surface disposed on the outer peripheral side of the cavity space, and an inner peripheral mold splitting surface disposed on the inner peripheral side of the cavity space,
The cavity space includes a seal surface molding site for molding a seal surface set at a lip top end portion of each seal lip on a part of the inner surface of the cavity space,
The outer peripheral mold split surface is disposed at a position shifted in one axial direction from a seal surface molding portion for molding a seal surface in one axial outer peripheral seal lip,
The X-ring of the X-ring is characterized in that the inner peripheral parting surface is disposed at a position shifted in the axial direction other than a seal surface forming part for forming a seal surface in the other inner peripheral side seal lip in the axial direction. Mold. 請求項１記載の成形型を用いてＸリングを成形することを特徴とするＸリングの製造方法。   A method for producing an X-ring, wherein the X-ring is molded using the mold according to claim 1. 請求項１記載の成形型を用いて成形されたことを特徴とするＸリング。   An X-ring formed using the mold according to claim 1.
JP2014105015A 2014-05-21 2014-05-21 X ring molding die and x ring manufacturing method, and x ring Pending JP2015218872A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109571843A (en) * 2018-11-19 2019-04-05 四川航天烽火伺服控制技术有限公司 A kind of X shape ring molding die

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0561567U (en) * 1992-01-28 1993-08-13 エヌオーケー株式会社 X-ring and its mold
JP2001254832A (en) * 2000-03-14 2001-09-21 Hitachi Metals Ltd Rubber packing for pipe coupling and pipe coupling using the same
JP2002295683A (en) * 2001-03-28 2002-10-09 Nok Corp Seal for dovetail groove
JP2004245299A (en) * 2003-02-13 2004-09-02 Nok Corp Sealing device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0561567U (en) * 1992-01-28 1993-08-13 エヌオーケー株式会社 X-ring and its mold
JP2001254832A (en) * 2000-03-14 2001-09-21 Hitachi Metals Ltd Rubber packing for pipe coupling and pipe coupling using the same
JP2002295683A (en) * 2001-03-28 2002-10-09 Nok Corp Seal for dovetail groove
JP2004245299A (en) * 2003-02-13 2004-09-02 Nok Corp Sealing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109571843A (en) * 2018-11-19 2019-04-05 四川航天烽火伺服控制技术有限公司 A kind of X shape ring molding die

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