TWI613062B - Welding method of resin molded article - Google Patents

Welding method of resin molded article Download PDF

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Publication number
TWI613062B
TWI613062B TW104109171A TW104109171A TWI613062B TW I613062 B TWI613062 B TW I613062B TW 104109171 A TW104109171 A TW 104109171A TW 104109171 A TW104109171 A TW 104109171A TW I613062 B TWI613062 B TW I613062B
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TW
Taiwan
Prior art keywords
component
end surface
convex portion
molded article
resin molded
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TW104109171A
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Chinese (zh)
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TW201600315A (en
Inventor
浦野浩和
寺田浩
佐佐木潔
川口英靖
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東洋熱交換器股份有限公司
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Publication of TW201600315A publication Critical patent/TW201600315A/en
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Publication of TWI613062B publication Critical patent/TWI613062B/en

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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
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124Tongue and groove joints
    • B29C66/1244Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
    • B29C66/12449Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue being asymmetric
    • 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
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124Tongue and groove joints
    • B29C66/1246Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
    • B29C66/12469Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being asymmetric
    • 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
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/32Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/322Providing cavities in the joined article to collect the burr
    • 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
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/32Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/324Avoiding burr formation
    • 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
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • 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
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832Reciprocating joining or pressing tools
    • B29C66/8322Joining or pressing tools reciprocating along one axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/18Heat-exchangers or parts thereof

Abstract

在將超音波熔黏機之焊頭4抵接至第1零件1之端面時,使熔融物不會自其內外周而流出至外側。 When the horn 4 of the ultrasonic fuser is brought into contact with the end face of the first component 1, the melt does not flow out to the outside from the inner and outer circumferences.

在第1零件1之端面1a預先設置階部3,將凸部1b之端部收納在該階部3。 The step portion 3 is provided in advance on the end surface 1a of the first component 1, and the end portion of the convex portion 1b is housed in the step portion 3.

Description

樹脂成形品之熔黏方法 Method for bonding resin molded articles

本發明係關於一種藉由超音波熔黏機而將樹脂製之第1零件與第2零件加以接合之接合方法。 The present invention relates to a joining method in which a first part made of a resin and a second part are joined by an ultrasonic fuser.

作為一例,樹脂製散熱器蓋係構成為分別利用樹脂成形品而將閥本體與蓋本體加以形成,將兩者嵌接,並藉由超音波熔黏而將其接合部加以接合。 As an example, the resin radiator cover is configured such that the valve body and the lid body are formed by a resin molded article, and the two are engaged with each other, and the joint portions are joined by ultrasonic welding.

在第1零件與第2零件為分別具有複雜形狀之情形時,可藉由分別將各零件加以成形,並將兩零件接合,而完成較為複雜之零件。 When the first part and the second part have complicated shapes, respectively, the parts can be formed by separately forming the parts and joining the two parts.

圖6至圖8係為先前之樹脂成形品之熔黏方法,圖6係為該第1零件1之俯視圖,圖7係為該第1零件1之縱剖面圖。 6 to 8 are a method of bonding a resin molded article, FIG. 6 is a plan view of the first component 1, and FIG. 7 is a longitudinal sectional view of the first component 1.

針對於藉由射出成形而將如上述般之環狀之第1零件1加以形成,如圖7所示般,自成形用模具之中心將已熔融之樹脂7注入至內部,如圖6所示般,經由複數個交聯部8而將其導向至半徑方向外側。 The first part 1 having the ring shape as described above is formed by injection molding, and as shown in Fig. 7, the molten resin 7 is injected into the center from the center of the mold for molding, as shown in Fig. 6. In general, it is guided to the outer side in the radial direction via a plurality of cross-linking portions 8.

此時,在經由複數個交聯部8而將熔融之樹脂7供給至環狀部時,有在其端面1a之表面上形成有微小之凸部1b之情 況。該凸部1b之高度係作為一例為0.02mm(參照圖3)左右而極微小。 At this time, when the molten resin 7 is supplied to the annular portion via the plurality of cross-linking portions 8, there is a slight convex portion 1b formed on the surface of the end surface 1a. condition. The height of the convex portion 1b is extremely small as an example of 0.02 mm (see FIG. 3).

然而,若對該第1零件1之端面1a抵接超音波熔黏機之焊頭4(或亦稱為擴大錘(cone))而施加超音波振動,則微小之凸部1b被按壓為平坦,如圖8般,凸部1b之端部當作為熔融部5而附著於端面1a之外周。因此,第1零件1之外周變得外觀不良,並且有該熔融部5產生分離而附著於零件各部之虞。 However, when the end face 1a of the first component 1 is brought into contact with the horn 4 of the ultrasonic fuser (also referred to as an enlarged cone) and ultrasonic vibration is applied, the minute convex portion 1b is pressed flat. As shown in Fig. 8, the end portion of the convex portion 1b is attached to the outer periphery of the end surface 1a as the molten portion 5. Therefore, the outer periphery of the first component 1 becomes poor in appearance, and the melted portion 5 is separated and adhered to each part of the component.

在如上述之成形品於內部具有閥單元之散熱器蓋之情形下,於產生分離之熔融部5滲入至零件內部時,被設置在蓋內之閥單元會因該產生分離之熔融部5之滲入而引起動作不良,而有損害散熱器蓋之密封性之虞。 In the case where the molded article as described above has a radiator cap having a valve unit therein, when the melted portion 5 that has been separated penetrates into the inside of the component, the valve unit provided in the cover may be separated by the melted portion 5 Infiltration causes poor operation and impairs the sealing of the radiator cap.

因此,本發明之課題在於,即使在端面1a之表面形成有此種凸部1b,在超音波振動時亦使其不會凸出至外部,而提供外觀良好且難以產生熔黏不良之成形品。 Therefore, an object of the present invention is to provide such a convex portion 1b on the surface of the end surface 1a so as not to protrude to the outside during ultrasonic vibration, and to provide a molded article which is excellent in appearance and hard to cause poor adhesion. .

第1發明所記載係一種樹脂成形品之熔黏方法,其係藉由超音波熔黏機將分別由樹脂成形品所形成之第1零件1與第2零件2相互接合之方法,並且包括有如下之步驟:將第1零件1之端面1a形成為近似環狀之平面,在該平面上存在微小之凸部1b,且在該端面1a之外周或內周之至少一者預先形成階部3;使該第1零件1與第2零件2接觸,將熔黏機之焊頭4抵接至第1零件1之上述端面1a,對該第1零件1施加超音波振動,一邊按壓上述微小之凸部1b,一邊將其形成為與平面為同一面,並且將 該凸部1b之端部熔黏至上述階部3,而使凸部1b之端部不會自第1零件1之端面1a之外周或內周之至少一者突出至半徑方向之外側或內側之至少一側。 According to a first aspect of the invention, there is provided a method of bonding a resin molded article, wherein the first component 1 and the second component 2 each formed of a resin molded article are joined to each other by an ultrasonic fuser, and a step of forming the end surface 1a of the first part 1 into a substantially annular plane, on which a minute convex portion 1b is present, and at least one of the outer circumference or the inner circumference of the end surface 1a is formed in advance with the step portion 3 The first component 1 is brought into contact with the second component 2, and the bonding head 4 of the fuser is brought into contact with the end surface 1a of the first component 1, and ultrasonic vibration is applied to the first component 1 while pressing the microscopic The convex portion 1b is formed on the same side as the plane, and will The end portion of the convex portion 1b is fused to the step portion 3, and the end portion of the convex portion 1b is not protruded from at least one of the outer circumference or the inner circumference of the end surface 1a of the first component 1 to the outer side or the inner side in the radial direction. At least one side.

第2發明所記載係如第1發明所記載之樹脂成形品之熔黏方法,其特徵在於:在端面1a之外周緣及內周緣,將上述階部3預先形成為環狀。 According to the second aspect of the invention, in the method of bonding a resin molded article according to the first aspect of the invention, the step portion 3 is formed in a ring shape in advance on the outer peripheral edge and the inner peripheral edge of the end surface 1a.

根據本發明之樹脂成形品之熔黏方法,在焊頭4所抵接之第1零件之端面1a之凸部1b被加以熔黏時,其端部被收納至階部3,而防止該凸部1b之端部被擠出至零件之外周,從而形成外觀良好之樹脂成形品。即,在熔黏步驟中,於將第1零件1之端面1a之凸部1b形成為與端面1a為同一面時,該凸部1b之端部被熔黏至設置在周緣之階部3,而使該端部不會凸出至外部。又,在如此將凸部1b之端部熔黏至階部3之情形下,由於可防止該凸部1b之端部產生分離並滲入至零件之內部,故而可提供難以產生熔黏不良之樹脂成形品。 According to the method of bonding a resin molded article of the present invention, when the convex portion 1b of the end surface 1a of the first component that the horn 4 abuts is fused, the end portion thereof is accommodated in the step portion 3 to prevent the convex portion. The end portion of the portion 1b is extruded to the outer periphery of the part to form a resin molded article having a good appearance. In other words, in the fusion bonding step, when the convex portion 1b of the end surface 1a of the first component 1 is formed to be flush with the end surface 1a, the end portion of the convex portion 1b is melted to the step portion 3 provided at the peripheral edge. The end portion does not protrude to the outside. Further, in the case where the end portion of the convex portion 1b is fused to the step portion 3 as described above, since the end portion of the convex portion 1b can be prevented from being separated and penetrated into the inside of the component, the resin which is less likely to cause poor adhesion can be provided. Molded product.

作為一例,在散熱器蓋之情形下,由於可防止會自凸部1b之端部所產生之熔融部5滲入至內部,故而可有效地防止其密封性被受損之情況。 As an example, in the case of the radiator cap, since the molten portion 5 generated from the end portion of the convex portion 1b can be prevented from infiltrating into the inside, it is possible to effectively prevent the sealing property from being impaired.

根據第2發明所記載之樹脂成形品之熔黏方法,由於將階部3在端面1b之外周緣及內周緣預先形成為環狀,故而可將凸部1b之端部確實地熔黏至設置在周緣之階部3。 According to the method of bonding a resin molded article according to the second aspect of the invention, since the step portion 3 is formed in a ring shape in the outer periphery and the inner peripheral edge of the end surface 1b, the end portion of the convex portion 1b can be surely melted to the setting. At the top of the circumference of the third.

1‧‧‧第1零件 1‧‧‧Part 1

1a‧‧‧端面 1a‧‧‧ end face

1b‧‧‧凸部 1b‧‧‧ convex

2‧‧‧第2零件 2‧‧‧Part 2

3‧‧‧階部 3‧‧‧

4‧‧‧焊頭 4‧‧‧welding head

5‧‧‧熔融部 5‧‧‧The Ministry of Fusion

6‧‧‧樹脂流向 6‧‧‧Resin flow

7‧‧‧樹脂 7‧‧‧Resin

8‧‧‧交聯部 8‧‧ ‧ Department of Cross-linking

圖1係為表示本發明之樹脂成形品之熔黏方法的說明圖,且為其熔黏前之要部縱剖面圖。 Fig. 1 is an explanatory view showing a method of bonding a resin molded article of the present invention, and is a longitudinal sectional view of a principal part before being melted.

圖2係為圖1之II-II箭視剖面圖。 Figure 2 is a cross-sectional view taken along line II-II of Figure 1.

圖3係為圖2之III-III箭視剖面放大圖。 Figure 3 is an enlarged cross-sectional view of the arrow III-III of Figure 2;

圖4係為本發明之樹脂成形品之熔黏方法之熔黏時之要部縱剖面放大圖。 Fig. 4 is an enlarged longitudinal sectional view of the essential part of the fusion bonding method of the resin molded article of the present invention.

圖5(A)及(B)係為圖4之V-VI箭視俯視圖(A),與該V-VI箭視俯視圖(A)之B-B箭視剖面圖。 5(A) and (B) are a cross-sectional view taken along the line B-B of the V-VI arrowhead plan view (A) of Fig. 4 and the V-VI arrowhead plan view (A).

圖6為係先前之第1零件1之端面1a之俯視圖。 Fig. 6 is a plan view showing the end face 1a of the first first component 1.

圖7為係先前之第1零件1之射出成形說明圖。 Fig. 7 is an explanatory view showing the injection molding of the first first component 1;

圖8係為在圖7中將第1零件1與焊頭4抵接時在抵接部所形成之熔融部5之說明圖。 Fig. 8 is an explanatory view showing the molten portion 5 formed at the abutting portion when the first component 1 and the horn 4 are brought into contact with each other in Fig. 7 .

其次,根據圖式而對本發明之實施形態進行說明。 Next, an embodiment of the present invention will be described based on the drawings.

本實施例係作為一例,針對以裝卸自如之方式被安裝在散熱器等之填注頸部且由一對分割體所形成之散熱器蓋來進行說明。 This embodiment is described as an example of a heat sink cover that is attached to a neck portion of a heat sink or the like and that is formed by a pair of divided bodies.

圖1係為經由未圖示之超音波熔黏機而將作為第1零件1之散熱器的閥本體與作為第2零件2的散熱器之蓋本體加以接合之說明圖。 FIG. 1 is an explanatory view showing a state in which a valve body as a heat sink of the first component 1 and a cover body as a heat sink of the second component 2 are joined via an ultrasonic fuser (not shown).

首先,將第1零件1與第2零件2嵌接。在該等之間預先介裝有閥單元。該閥單元係如圖1所示,負壓閥與正壓閥為經由環狀之閥座而相對向,該等之閥係藉由負壓彈簧與正壓彈簧而被 施力。於該時間點,第1零件1與第2零件2係尚未被固定。 First, the first part 1 and the second part 2 are fitted together. A valve unit is pre-installed between the two. The valve unit is as shown in FIG. 1. The negative pressure valve and the positive pressure valve are opposite to each other via an annular valve seat, and the valves are pressed by a negative pressure spring and a positive pressure spring. Force. At this point of time, the first part 1 and the second part 2 are not yet fixed.

在該第1零件1之端面1a的表面,沿著放射方向形成有複數個凸部1b。該凸部1b係如圖3所示,作為其高度之一例,為0.02mm左右而極微小。 On the surface of the end surface 1a of the first component 1, a plurality of convex portions 1b are formed along the radial direction. The convex portion 1b is as shown in Fig. 3, and is an example of the height thereof, and is extremely small at about 0.02 mm.

其次,在此發明中,於第1零件1之端面1a的外周及內周,如圖1及圖2所示般形成有微小之階差即階部3。而且,將未圖示之超音波熔黏機之焊頭4抵接至第1零件1之端面1a,而對第1零件1及第2零件2之間施加超音波振動。 Next, in the present invention, as shown in FIGS. 1 and 2, the step portion 3, which is a small step, is formed on the outer circumference and the inner circumference of the end surface 1a of the first component 1. Then, the horn 4 of the ultrasonic fuser (not shown) is brought into contact with the end face 1a of the first component 1, and ultrasonic vibration is applied between the first component 1 and the second component 2.

上述微小之凸部1b係藉由該振動而被壓入至端面1a之平面內而形成為平坦狀。與此同時,如圖4或圖5般,會自該凸部1b之兩端部所產生之熔融部5係熔黏至階部3,並在該處保持有熔融部5。因此,於超音波振動時所流出至第1零件1之內周側及外周側的熔融部5係不會自該處而凸出至外部。藉此,進行外觀為良好之熔黏。進而,由於可防止熔融部5滲入至散熱器蓋之內部,故而不會對閥單元之動作產生影響。 The minute convex portion 1b is formed into a flat shape by being pressed into the plane of the end surface 1a by the vibration. At the same time, as shown in Fig. 4 or Fig. 5, the molten portion 5 generated from both end portions of the convex portion 1b is welded to the step portion 3, and the molten portion 5 is held there. Therefore, the molten portion 5 that flows out to the inner peripheral side and the outer peripheral side of the first component 1 during the ultrasonic vibration does not protrude from the outside to the outside. Thereby, the appearance is a good fusion. Further, since the molten portion 5 can be prevented from infiltrating into the inside of the radiator cover, it does not affect the operation of the valve unit.

此時,於圖1中,第1零件1之下端部係形成為環狀之凸部,第2零件2之上端部係形成為環狀之槽部,兩者係如圖1般嵌接著。而且,藉由超音波振動,而兩者之嵌接部產生熔黏。藉此,第1零件1與第2零件2被一體化。 At this time, in FIG. 1, the lower end portion of the first component 1 is formed into a ring-shaped convex portion, and the upper end portion of the second component 2 is formed into an annular groove portion, and the two are fitted as shown in FIG. Moreover, by the ultrasonic vibration, the engagement portions of the two are melted. Thereby, the first component 1 and the second component 2 are integrated.

進而,如圖1所記載般,第1零件1之端面1a的位置係以自載置有負彈簧之彈簧座之端面與交聯部8之端面之位置而錯開高度之方式加以設置(在該圖中,端面1a之位置係自彈簧座之端面而向上方突出為環狀)。相對於此,在先前技術之圖7中,端面1a與彈簧座與交聯部8係形成為大致同一面。 Further, as shown in FIG. 1, the position of the end surface 1a of the first component 1 is set so as to be shifted from the position of the end surface of the spring seat on which the negative spring is placed and the end surface of the cross-linking portion 8 (in this case) In the figure, the position of the end face 1a is formed from the end face of the spring seat and protrudes upward into a ring shape). On the other hand, in FIG. 7 of the prior art, the end surface 1a and the spring seat and the cross-linking portion 8 are formed substantially in the same plane.

在採用此種構造之情形下,由於焊頭4所抵接之面僅為端面1a,故而對端面1a進行階部3之加工即可,而樹脂製散熱器蓋的製造變得容易,且能夠將自凸部1b之端部所會產生之熔融部5確實地熔黏至階部3。 In the case of adopting such a configuration, since the surface on which the horn 4 abuts is only the end surface 1a, the end portion 1a can be processed in the step portion 3, and the manufacture of the resin-made radiator cap becomes easy and can be performed. The molten portion 5 which is generated from the end portion of the convex portion 1b is surely welded to the step portion 3.

1‧‧‧第1零件 1‧‧‧Part 1

1a‧‧‧端面 1a‧‧‧ end face

2‧‧‧第2零件 2‧‧‧Part 2

3‧‧‧階部 3‧‧‧

4‧‧‧焊頭 4‧‧‧welding head

Claims (2)

一種樹脂成形品之熔黏方法,其係藉由超音波熔黏機將分別由樹脂成形品所形成之第1零件(1)與第2零件(2)相互接合之方法,並且包括有如下之步驟:將第1零件(1)之端面(1a)形成為近似環狀之平面,在該平面上存在微小之凸部(1b),且在該端面(1a)之外周或內周之至少一者預先形成階部(3);使該第1零件(1)與第2零件(2)接觸,將熔黏機之焊頭(4)抵接至第1零件(1)之上述端面(1a),對該第1零件(1)施加超音波振動,一邊按壓上述微小之凸部(1b),一邊將其形成為與平面為同一面,並且將該凸部(1b)之端部熔黏至上述階部(3),而使凸部(1b)之端部不會自第1零件(1)之端面(1a)之外周或內周之至少一者突出至半徑方向之外側或內側之至少一側。 A method for bonding a resin molded article, which is a method in which a first component (1) and a second component (2) each formed of a resin molded article are joined to each other by an ultrasonic fuser, and includes the following Step: forming the end surface (1a) of the first part (1) into a substantially annular plane, on which a minute convex portion (1b) exists, and at least one of the outer circumference or the inner circumference of the end surface (1a) The step (3) is formed in advance; the first part (1) is brought into contact with the second part (2), and the welding head (4) of the fusion bonding machine is brought into contact with the end surface (1a) of the first part (1). Ultrasonic vibration is applied to the first component (1), and the minute convex portion (1b) is pressed to form the same surface as the plane, and the end portion of the convex portion (1b) is melted. Up to the step (3), the end portion of the convex portion (1b) does not protrude from at least one of the outer circumference or the inner circumference of the end surface (1a) of the first part (1) to the outer side or the inner side of the radial direction At least one side. 如申請專利範圍第1項之樹脂成形品之熔黏方法,其中,在端面(1a)之外周緣及內周緣,將上述階部(3)預先形成為環狀。 The method of bonding a resin molded article according to the first aspect of the invention, wherein the step (3) is formed in a ring shape in advance on the outer periphery and the inner periphery of the end surface (1a).
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