JP2007062123A

JP2007062123A - Method for producing resin-made component

Info

Publication number: JP2007062123A
Application number: JP2005250574A
Authority: JP
Inventors: Akira Tanabe; 彰田辺; Tetsuya Yamamoto; 哲也山本
Original assignee: Toyota Motor Corp
Current assignee: Toyota Motor Corp
Priority date: 2005-08-31
Filing date: 2005-08-31
Publication date: 2007-03-15

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a resin component which can inexpensively suppress the occurrence of burrs. <P>SOLUTION: (1) In the method for producing the resin component, an internal space 11 is formed in a plurality of resin members 10 by contacting the resin members 10, intercepted from the exterior 12 of the resin members 10, and pressurized with air, and the resin members 10 are welded to each other while the internal space 11 is pressurized. (2) An air static pressure is applied to the internal space 11, and the outflow of a dissolved material into the internal space 11 by the static pressure is suppressed. (3) The air pressurization is carried out by sending air directly into the internal space 11. (4) Projections 20 are formed on the welded surfaces 13 of the resin members 10, and the resin members 10 are welded together by dissolving the projections 20 and pressing the resin members 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、複数の樹脂部材を溶着して樹脂製部品を製造する樹脂製部品の製造方法に関する。 The present invention relates to a method for manufacturing a resin part in which a plurality of resin members are welded to manufacture a resin part.

樹脂部材同士を溶着させる方法として、振動、熱板、超音波などによる熱で溶解させて上下から圧着する、振動溶着、熱板溶着（接触、非接触式）、超音波溶着がある。 As a method for welding the resin members, there are vibration welding, hot plate welding (contact and non-contact type), and ultrasonic welding in which the resin members are melted by heat by vibration, a hot plate, ultrasonic waves, and the like and bonded from above and below.

しかし、従来の溶着方法には、つぎの問題点がある。
複数の樹脂部材を溶着して管形状の樹脂製部品を製造する場合、樹脂部材同士の溶着面（端面）を溶解させ圧着すると、樹脂が溶着部の内外部に流れ出す。そのため、溶着部の内外部にバリができる。内部にバリが出るため、樹脂製部品の流路が狭くなり、かつ、流れが乱れるため、圧力損失が大きくなる。
特開２００１−２６０５６号公報は、樹脂部材同士を溶着する時に溶着面の側方から空気を所定タイミングで吹き付けてバリの発生を抑制する、樹脂製部品の製造方法を開示している。
しかし、特開２００１−２６０５６号公報開示の方法には、つぎの問題点がある。
複雑な形状の空気管が必要になり、コスト高である。
特開２００１−２６０５６号公報特開平５−１７７７１２号公報 However, the conventional welding method has the following problems.
When a tubular resin part is manufactured by welding a plurality of resin members, the resin flows out to the inside and outside of the welded portion when the welding surfaces (end surfaces) of the resin members are melted and pressed. Therefore, burrs can be formed inside and outside the welded portion. Since burrs are generated inside, the flow path of the resin part is narrowed and the flow is disturbed, resulting in an increase in pressure loss.
Japanese Patent Application Laid-Open No. 2001-26056 discloses a method for manufacturing a resin part in which air is blown from a side of a welding surface at a predetermined timing to suppress generation of burrs when welding resin members.
However, the method disclosed in Japanese Patent Laid-Open No. 2001-26056 has the following problems.
A complicatedly shaped air pipe is required, which is expensive.
JP 2001-26056 A Japanese Patent Laid-Open No. 5-177712

本発明が解決しようとする第１の問題点は、バリができることである。
本発明が解決しようとする第２の問題点は、バリ発生抑制に大幅なコストアップを要することである。
本発明の目的は、バリが発生することを安価に抑制できる樹脂製部品の製造方法を提供することにある。 The first problem to be solved by the present invention is that burr can be formed.
The second problem to be solved by the present invention is that a significant increase in cost is required to suppress the occurrence of burrs.
An object of the present invention is to provide a method of manufacturing a resin part that can suppress the generation of burrs at a low cost.

上記目的を達成する本発明はつぎの通りである。
（１）複数の樹脂部材を接触させて該複数の樹脂部材の内部に内部空間を形成するとともに該内部空間を前記複数の樹脂部材の外部から遮断し、
前記内部空間をエア加圧し、
前記内部空間の加圧状態を保ったまま前記複数の樹脂部材同士を溶着する、樹脂製部品の製造方法。
（２）前記内部空間にエアの静圧をかけ、該静圧によって溶解材料の前記内部空間への流出を抑制する、（１）記載の樹脂製部品の製造方法。
（３）前記エア加圧は前記内部空間に直接空気を送り込むことで行われる（１）記載の樹脂製部品の製造方法。
（４）前記複数の樹脂部材は溶着面に突起部を有し、該突起部を溶解させるとともに前記複数の樹脂部材を圧着することで前記複数の樹脂部材が溶着される（１）記載の樹脂製部品の製造方法。
（５）前記突起部の断面形状は矩形である（４）記載の樹脂製部品の製造方法。
（６）前記突起部の断面形状は台形である（４）記載の樹脂製部品の製造方法。
（７）前記突起部の断面形状は半円形である（４）記載の樹脂製部品の製造方法。
（８）前記突起部の幅Ｄ４と前記樹脂部材の厚みＤ３との関係が、
Ｄ４＝０．７〜０．９×Ｄ３
とされている（５）〜（７）記載の樹脂製部品の製造方法。
（９）前記突起部の前記樹脂部材の溶着面からの高さＨと前記樹脂部材の厚みＤ３との関係が、
Ｈ＝０．１〜０．３×Ｄ３
とされている（５）〜（７）記載の樹脂製部品の製造方法。
（１０）前記複数の樹脂部材の各樹脂部材の形状は管形状である（１）記載の樹脂製部品の製造方法。 The present invention for achieving the above object is as follows.
(1) Contacting a plurality of resin members to form an internal space inside the plurality of resin members and blocking the internal space from the outside of the plurality of resin members,
Pressurizing the internal space with air,
A method of manufacturing a resin part, wherein the plurality of resin members are welded together while maintaining a pressurized state of the internal space.
(2) The method for producing a resin part according to (1), wherein static pressure of air is applied to the internal space, and the outflow of the dissolved material to the internal space is suppressed by the static pressure.
(3) The method of manufacturing a resin part according to (1), wherein the air pressurization is performed by sending air directly into the internal space.
(4) The resin according to (1), wherein the plurality of resin members have protrusions on a welding surface, and the plurality of resin members are welded by melting the protrusions and pressing the plurality of resin members. A manufacturing method for manufactured parts.
(5) The method for manufacturing a resin component according to (4), wherein the protrusion has a rectangular cross-sectional shape.
(6) The method for manufacturing a resin part according to (4), wherein the cross-sectional shape of the protrusion is a trapezoid.
(7) The method for manufacturing a resin part according to (4), wherein a cross-sectional shape of the protrusion is a semicircle.
(8) The relationship between the width D4 of the protrusion and the thickness D3 of the resin member is
D4 = 0.7-0.9 × D3
(5)-(7) described above, The manufacturing method of the resin-made components.
(9) The relationship between the height H of the protrusion from the welding surface of the resin member and the thickness D3 of the resin member is
H = 0.1-0.3 × D3
(5)-(7) described above, The manufacturing method of the resin-made components.
(10) The method of manufacturing a resin part according to (1), wherein each of the plurality of resin members has a tubular shape.

上記（１）〜（１０）の樹脂製部品の製造方法では、内部空間をエア加圧し、内部空間の加圧状態を保ったまま複数の樹脂部材同士を溶着するので、溶着時に樹脂が内部空間に流出し難くなる（はみ出し難くなる）。そのため、バリが発生することを抑制できる。
また、内部空間の加圧は、内部空間に空気を送り込むこと等により行うことができるため、複雑な空気配管を設ける場合に比べて、コスト面で有利である。
上記（２）の樹脂製部品の製造方法では、内部空間にエアの静圧をかけ、該静圧によって溶解材料の内部空間への流出を抑制できる。
上記（３）の樹脂製部品の製造方法では、エア加圧が内部空間に直接空気を送り込むことで行われるので、容易に加圧でき、また、安価に加圧できる。
上記（４）の樹脂製部品の製造方法では、突起部を溶解させるとともに複数の樹脂部材を圧着することで複数の樹脂部材が溶着されるので、突起部の形状を所定範囲内の形状にすることにより、突起部が設けられていない場合に比べて、バリが発生する量を抑制できる。
上記（５）または（６）の樹脂製部品の製造方法では、樹脂部材同士の位置合わせが容易である。
上記（６）または（７）の樹脂製部品の製造方法では、溶着面から離れるにつれて突起部の幅が細くなるため、小さい力で容易に突起部をつぶすことができる。
上記（８）または（９）の樹脂製部品の製造方法では、バリの発生を抑え、かつ、十分な圧着力を得ることができる。 In the method for manufacturing a resin part according to the above (1) to (10), the internal space is pressurized with air, and a plurality of resin members are welded while maintaining the pressurized state of the internal space. It will be difficult to leak out (it will be difficult to protrude). Therefore, it can suppress that a burr | flash generate | occur | produces.
Moreover, since pressurization of the internal space can be performed by sending air into the internal space, etc., it is advantageous in terms of cost compared to the case where a complicated air pipe is provided.
In the method for manufacturing a resin part of (2) above, static pressure of air is applied to the internal space, and the outflow of the dissolved material to the internal space can be suppressed by the static pressure.
In the method for producing a resin component of (3) above, air pressurization is performed by sending air directly into the internal space, so that pressurization can be performed easily and inexpensively.
In the method for manufacturing a resin part of (4) above, since the plurality of resin members are welded by melting the protrusions and pressing the plurality of resin members, the shape of the protrusions is set to a shape within a predetermined range. Thereby, compared with the case where the projection part is not provided, the quantity which a burr | flash generate | occur | produces can be suppressed.
In the method for manufacturing a resin part according to (5) or (6), it is easy to align the resin members.
In the method for manufacturing a resin part according to (6) or (7), since the width of the protrusion becomes narrower as the distance from the welding surface increases, the protrusion can be easily crushed with a small force.
In the method for producing a resin part according to the above (8) or (9), the generation of burrs can be suppressed and a sufficient crimping force can be obtained.

図１〜図６を参照して、本発明実施例の樹脂製部品の製造方法を説明する。
本発明実施例の樹脂製部品の製造方法にて製造される樹脂製部品１０は、たとえば、燃料電池の水素配管に用いられる。ただし、樹脂製部品１０は、燃料電池の水素配管以外に用いられてもよい。
本発明実施例の樹脂製部品の製造方法は、複数の樹脂部材１０を溶着して樹脂製部品を製造する方法である。樹脂部材１０同士を溶着する方法は、振動溶着方法、熱板溶着方法（接触、非接触式）、超音波溶着方法のいずれであってもよい。
本発明実施例の樹脂製部品の製造方法は、図２に示すように、（ａ）複数の樹脂部材１０を接触させて複数の樹脂部材１０の内部に内部空間１１を形成するとともに内部空間１１を複数の樹脂部材１０の外部１２から遮断する工程と、（ｂ）内部空間１１をエア加圧する工程と、（ｃ）内部空間１１の加圧状態を保ったまま複数の樹脂部材１０同士を溶着する工程と、を有する。 With reference to FIGS. 1-6, the manufacturing method of the resin parts of the Example of this invention is demonstrated.
The resin part 10 manufactured by the method for manufacturing a resin part according to the embodiment of the present invention is used, for example, for a hydrogen pipe of a fuel cell. However, the resin part 10 may be used other than the hydrogen piping of the fuel cell.
The method for manufacturing a resin part according to the embodiment of the present invention is a method for manufacturing a resin part by welding a plurality of resin members 10. The method of welding the resin members 10 may be any of a vibration welding method, a hot plate welding method (contact or non-contact type), and an ultrasonic welding method.
As shown in FIG. 2, the method for manufacturing a resin part according to the embodiment of the present invention includes: (a) contacting a plurality of resin members 10 to form internal spaces 11 inside the plurality of resin members 10, and internal spaces 11. (B) a step of air-pressurizing the internal space 11, and (c) welding the plurality of resin members 10 while maintaining the pressurized state of the internal space 11. And a step of performing.

複数の樹脂部材１０の各樹脂部材１０の形状は、管形状である。管形状の樹脂部材１０同士を溶着して管形状の樹脂製部品が得られる。図４〜図６に示すように、樹脂部材１０の、最外径（直径）をＤ１、内径（直径）をＤ２、厚み(溶着面１３の幅)をＤ３とすると、樹脂部材１０を溶着して樹脂製部品が得られるため、樹脂製部品の、最外径(直径)はＤ１であり、内径（直径）はＤ２であり、厚みはＤ３である。Ｄ１、Ｄ２、Ｄ３は、周方向で一定である。
樹脂部材１０の溶着面（軸方向端面）１３に突起部２０が設けられている。突起部２０は、樹脂部材１０と同じ材料からなり、樹脂部材１０に一体に形成される。突起部２０を溶解させるとともに複数の樹脂部材１０を圧着することで複数の樹脂部材１０が溶着される。 The shape of each resin member 10 of the plurality of resin members 10 is a tube shape. A tubular resin part is obtained by welding the tubular resin members 10 together. As shown in FIGS. 4 to 6, when the outermost diameter (diameter) of the resin member 10 is D1, the inner diameter (diameter) is D2, and the thickness (width of the welding surface 13) is D3, the resin member 10 is welded. Therefore, the outermost diameter (diameter) of the resin part is D1, the inner diameter (diameter) is D2, and the thickness is D3. D1, D2, and D3 are constant in the circumferential direction.
A protrusion 20 is provided on the welding surface (axial end surface) 13 of the resin member 10. The protrusion 20 is made of the same material as the resin member 10 and is formed integrally with the resin member 10. The plurality of resin members 10 are welded by dissolving the protrusions 20 and crimping the plurality of resin members 10.

突起部２０は、複数の樹脂部材１０の各樹脂部材１０の溶着面１３に設けられる。突起部２０は、樹脂部材１０の周方向に連続して設けられている。突起部２０の幅Ｄ４、高さＨは、図３に示すように、周方向で一定である。
突起部２０の幅Ｄ４と、樹脂部材１０の厚みＤ３との関係は、
Ｄ４＝０．７〜０．９×Ｄ３
とされている。Ｄ４がこれ以下の場合十分な圧着力を得られず、Ｄ４がこれ以上の場合溶解樹脂が外部１２に流出し溶着部の外部にバリができてしまうからである。
突起部２０の高さＨと、樹脂部材１０の厚みＤ３との関係は、
Ｈ＝０．１〜０．３×Ｄ３
とされている。Ｈがこれ以下の場合十分な圧着力を得られず、Ｈがこれ以上の場合溶解樹脂が外部１２に流出し溶着部の内外部にバリができてしまうからである。なお、外部１２にバリが発生しても、問題なければ、突起部２０は不要である。 The protrusion 20 is provided on the welding surface 13 of each resin member 10 of the plurality of resin members 10. The protrusion 20 is provided continuously in the circumferential direction of the resin member 10. As shown in FIG. 3, the width D4 and the height H of the protrusion 20 are constant in the circumferential direction.
The relationship between the width D4 of the protrusion 20 and the thickness D3 of the resin member 10 is
D4 = 0.7-0.9 × D3
It is said that. This is because when D4 is less than this, a sufficient pressure-bonding force cannot be obtained, and when D4 is more than this, the molten resin flows out to the outside 12 and burrs are formed outside the welded portion.
The relationship between the height H of the protrusion 20 and the thickness D3 of the resin member 10 is
H = 0.1-0.3 × D3
It is said that. This is because when H is less than this, a sufficient pressure-bonding force cannot be obtained, and when H is more than this, the molten resin flows out to the outside 12 and burrs are formed inside and outside the welded portion. If there is no problem even if burrs occur on the outside 12, the protrusion 20 is unnecessary.

突起部２０の断面形状は、図４に示すように、矩形であってもよく、図５に示すように、溶着面１３から離れるにしたがって幅が細くなる台形であってもよく、図６に示すように、溶着面１３から離れるにしたがって幅が細くなる半円形であってもよい。突起部２０の断面形状が台形または半円形である場合、突起部２０の幅Ｄ４は、溶着面１３側の端部（根元部）の幅である。
突起部２０の内径は、図３〜図６に示すように、樹脂部材１０の内径よりも大とされていてもよいが、図１に示すように、樹脂部材１０の内径と等しくされていることが望ましい。突起部２０を設けた場合であっても、段差(図４〜図６のＡ)ができることを防止できるからである。 The cross-sectional shape of the protrusion 20 may be rectangular as shown in FIG. 4, or may be a trapezoid whose width becomes narrower as it is away from the welding surface 13, as shown in FIG. As shown, it may be a semicircular shape whose width becomes narrower as the distance from the welding surface 13 increases. When the cross-sectional shape of the protruding portion 20 is trapezoidal or semicircular, the width D4 of the protruding portion 20 is the width of the end portion (root portion) on the welding surface 13 side.
The inner diameter of the protrusion 20 may be larger than the inner diameter of the resin member 10 as shown in FIGS. 3 to 6, but is made equal to the inner diameter of the resin member 10 as shown in FIG. It is desirable. This is because even when the protrusion 20 is provided, it is possible to prevent a step (A in FIGS. 4 to 6) from being formed.

内部空間１１の外部１２からの遮断は、図２に示すように、樹脂部材１０の軸方向両側に配置される押さえ部材３０により行われる。押さえ部材３０は、樹脂部材１０の軸方向一側に配置される第１の押さえ部材３１と、樹脂部材１０の軸方向他側に配置される第２の押さえ部材３２と、を備える。 As shown in FIG. 2, the internal space 11 is blocked from the outside 12 by pressing members 30 disposed on both sides in the axial direction of the resin member 10. The pressing member 30 includes a first pressing member 31 disposed on one axial side of the resin member 10 and a second pressing member 32 disposed on the other axial side of the resin member 10.

内部空間１１のエア加圧は、内部空間１１に直接空気を送り込むことで行われる。エア加圧は、第１の押さえ部材３１に設けられる空気流入孔３１ａから空気を直接内部空間１１に送り込むことで行われる。
第２の押さえ部材３２に空気流出孔３２ａが設けられている。空気流出孔３２ａが設けられているので、空気流入孔３１ａから内部空間１１に流入した空気を外部１２に流出させることができる。なお、空気流出孔３２ａから流出する空気量は、バルブ３３等により調節できるようになっていることが望ましい。 Air pressurization of the internal space 11 is performed by sending air directly into the internal space 11. The air pressurization is performed by sending air directly into the internal space 11 from an air inflow hole 31 a provided in the first pressing member 31.
The second pressing member 32 is provided with an air outflow hole 32a. Since the air outflow hole 32 a is provided, the air that has flowed into the internal space 11 from the air inflow hole 31 a can flow out to the outside 12. It is desirable that the amount of air flowing out from the air outflow hole 32a can be adjusted by the valve 33 or the like.

ここで、本発明実施例の作用、効果を説明する。
本発明実施例では、内部空間１１をエア加圧し、内部空間１１の加圧状態を保ったまま複数の樹脂部材１０同士を溶着するので、溶着時に溶解樹脂が内部空間１１に流出し難くなる（はみ出し難くなる）。内部空間１１にエアの静圧をかけ、静圧によって溶解材料の内部空間１１への流出を抑制できる。そのため、内部空間１１にバリが発生することを抑制できる。バリが発生することを抑制できるため、（ｉ）後処理が不要であり、（ｉｉ）圧力損失を低減でき、（ｉｉｉ）作業性が向上する。
内部空間１１の加圧が内部空間１１に直接空気を送り込むことで行われるので、複雑な形状の空気配管等は不要である。そのため、容易にかつ安価に加圧できる。 Here, the operation and effect of the embodiment of the present invention will be described.
In the embodiment of the present invention, the internal space 11 is pressurized with air, and the plurality of resin members 10 are welded while maintaining the pressurized state of the internal space 11, so that it is difficult for the molten resin to flow into the internal space 11 during welding ( It will be difficult to protrude.) The static pressure of air is applied to the internal space 11 and the outflow of the dissolved material to the internal space 11 can be suppressed by the static pressure. Therefore, it is possible to suppress the occurrence of burrs in the internal space 11. Since generation | occurrence | production of a burr | flash can be suppressed, (i) post-processing is unnecessary, (ii) pressure loss can be reduced, and (iii) workability | operativity improves.
Since pressurization of the internal space 11 is performed by sending air directly into the internal space 11, a complicatedly shaped air pipe or the like is unnecessary. Therefore, it can be pressurized easily and inexpensively.

突起部２０が設けられているので、突起部２０を設けない場合に比べて外部１２へのバリの発生を抑制できる。外部１２へのバリの発生を抑制できるため、外部１２に余分なスペースを確保する必要が無く、見栄えもよい。 Since the protruding portion 20 is provided, the occurrence of burrs to the outside 12 can be suppressed as compared with the case where the protruding portion 20 is not provided. Since the occurrence of burrs on the outside 12 can be suppressed, it is not necessary to secure an extra space in the outside 12 and the appearance is good.

突起部２０の断面形状が矩形または台形の場合（図４、図５）、突起部２０同士を面で接触させることができるため、樹脂部材１０同士の位置合わせが容易である。
突起部２０の形状が台形または半円形の場合（図５、図６）、溶着面１３から離れるにつれて突起部２０の幅が細くなるため、小さい力で容易に突起部２０をつぶすことができる。 When the cross-sectional shape of the protrusion 20 is rectangular or trapezoidal (FIGS. 4 and 5), the protrusions 20 can be brought into contact with each other on the surface, so that the resin members 10 can be easily aligned.
When the shape of the protruding portion 20 is trapezoidal or semicircular (FIGS. 5 and 6), the width of the protruding portion 20 becomes narrower as the distance from the welding surface 13 increases, so that the protruding portion 20 can be easily crushed with a small force.

突起部２０の幅Ｄ４と樹脂部材１０の厚みＤ３との関係が、
Ｄ４＝０．７〜０．９×Ｄ３
とされており、
また、突起部２０の高さＨと樹脂部材１０の厚みＤ３との関係が、
Ｈ＝０．１〜０．３×Ｄ３
とされているので、バリの発生を抑え、かつ、十分な圧着力を得ることができる。 The relationship between the width D4 of the protrusion 20 and the thickness D3 of the resin member 10 is
D4 = 0.7-0.9 × D3
And
In addition, the relationship between the height H of the protrusion 20 and the thickness D3 of the resin member 10 is
H = 0.1-0.3 × D3
Therefore, it is possible to suppress the generation of burrs and obtain a sufficient crimping force.

空気流出孔３２ａから外部１２に流出する空気量をバルブ３３により調節できるため、バルブ３３の開閉量を調節して、空気流入孔３１ａから内部空間１１に流入する空気量に比べて空気流出孔３２ａから外部１２に流出する空気量を少なくすることにより、内部空間１１内を樹脂部材１０の軸方向に空気を流しつつ加圧できる。内部空間１１の空気を樹脂部材１０の軸方向に流すことができるため、溶着部の冷却時間を短縮できる。 Since the amount of air flowing out from the air outflow hole 32a to the outside 12 can be adjusted by the valve 33, the opening / closing amount of the valve 33 is adjusted, and the air outflow hole 32a is compared with the amount of air flowing into the internal space 11 from the air inflow hole 31a. By reducing the amount of air flowing out from the outside 12 to the outside 12, it is possible to pressurize the interior space 11 while flowing air in the axial direction of the resin member 10. Since the air in the internal space 11 can flow in the axial direction of the resin member 10, the cooling time of the welded portion can be shortened.

本発明実施例の樹脂製部品の製造方法の、樹脂部材同士を溶着させる前の樹脂部材を示す断面図であるIt is sectional drawing which shows the resin member before welding the resin members of the manufacturing method of the resin-made components of this invention Example. 本発明実施例の樹脂製部品の製造方法の、樹脂部材同士を溶着させるときの樹脂部材を示す断面図である。It is sectional drawing which shows the resin member when welding the resin members of the manufacturing method of the resin parts of the Example of this invention. 本発明実施例の樹脂製部品の製造方法の、樹脂部材の突起部での断面図である。It is sectional drawing in the protrusion part of the resin member of the manufacturing method of the resin-made components of the Example of this invention. 本発明実施例の樹脂製部品の製造方法の、突起部の断面形状が矩形である場合の、樹脂部材の断面図である。It is sectional drawing of the resin member in case the cross-sectional shape of a projection part is a rectangle of the manufacturing method of the resin-made components of the Example of this invention. 本発明実施例の樹脂製部品の製造方法の、突起部の断面形状が台形である場合の、樹脂部材の断面図である。It is sectional drawing of a resin member in case the cross-sectional shape of a projection part is a trapezoid of the manufacturing method of the resin-made components of the Example of this invention. 本発明実施例の樹脂製部品の製造方法の、突起部の断面形状が半円形である場合の、樹脂部材の断面図である。It is sectional drawing of a resin member in case the cross-sectional shape of a projection part is a semicircle of the manufacturing method of the resin-made components of an Example of this invention.

Explanation of symbols

１０樹脂部材
１１内部空間
１２外部
１３溶着面
２０突起部
３０押さえ部材
３１第１の押さえ部材３１
３１ａ空気流入孔
３２第２の押さえ部材３２
３２ａ空気流出孔
３３バルブ DESCRIPTION OF SYMBOLS 10 Resin member 11 Internal space 12 External 13 Welding surface 20 Protrusion part 30 Pressing member 31 1st pressing member 31
31a Air inflow hole 32 Second pressing member 32
32a Air outflow hole 33 Valve

Claims

A plurality of resin members are contacted to form an internal space inside the plurality of resin members and the internal space is blocked from the outside of the plurality of resin members,
Pressurizing the internal space with air,
A method of manufacturing a resin part, wherein the plurality of resin members are welded together while maintaining a pressurized state of the internal space.

The method for manufacturing a resin part according to claim 1, wherein a static pressure of air is applied to the internal space, and the outflow of the dissolved material to the internal space is suppressed by the static pressure.

The method of manufacturing a resin part according to claim 1, wherein the air pressurization is performed by sending air directly into the internal space.

2. The resin component according to claim 1, wherein the plurality of resin members have protrusions on a welding surface, and the plurality of resin members are welded by melting the protrusions and pressing the plurality of resin members. Production method.

The method for manufacturing a resin part according to claim 4, wherein a cross-sectional shape of the protrusion is rectangular.

The method of manufacturing a resin part according to claim 4, wherein a cross-sectional shape of the protrusion is a trapezoid.

The method of manufacturing a resin part according to claim 4, wherein a cross-sectional shape of the protrusion is a semicircle.

The relationship between the width D4 of the protrusion and the thickness D3 of the resin member is
D4 = 0.7-0.9 × D3
The method for producing a resin part according to claim 5, wherein:

The relationship between the height H of the protrusion from the welding surface of the resin member and the thickness D3 of the resin member is
H = 0.1-0.3 × D3
The method for producing a resin part according to claim 5, wherein:

The method for manufacturing a resin part according to claim 1, wherein each of the plurality of resin members has a tubular shape.