CN104029384A

CN104029384A - Laser and ultrasonic-wave seamless welding fixture for plastic and plastic welding method

Info

Publication number: CN104029384A
Application number: CN201410280088.7A
Authority: CN
Inventors: 李曦
Original assignee: Kunshan Steps Brother Electro-Optical Technology Inc (us) 62 Martin Road Concord Massachusetts 017 Of Cisco
Current assignee: Kunshan Steps Brother Electro-Optical Technology Inc (us) 62 Martin Road Concord Massachusetts 017 Of Cisco
Priority date: 2014-06-23
Filing date: 2014-06-23
Publication date: 2014-09-10

Abstract

The invention discloses a laser and ultrasonic-wave seamless welding fixture for plastic and a plastic welding method. The seamless welding fixture comprises an upper positioning block and a lower positioning block for clamping and fixing two pieces of plastic to be welded, wherein the upper positioning block and the lower positioning block clamp the two pieces of plastic to be welded up and down by virtue of air cylinders; a welding seam gap is formed in the connection part of the two pieces of plastic to be welded; the upper positioning block and the lower positioning block are respectively provided with an extending part at one side of the welding seam gap, and the extending parts are vertical to the upper positioning block and the lower positioning block, respectively; the welding seam gap is sheltered by one extending part; both the upper positioning block and the lower positioning block are made from a transparent material through which laser or ultrasonic waves can penetrate. Since the outer surface at a welding seam is sheltered by the improved fixture, so that plastic is prevented from overflowing when a welding material overflows and the smoothness of the welding seam is ensured; the welding seam is melted to partially or entirely sink, so that enough flowing plastic can be formed to fill up the welding seam gap, and the overflowing plastic fills up the original gap; besides, due to the restriction from the fixture, no overflowing material is generated and therefore, a product with intact and uniform appearance is formed.

Description

Laser and Ultrasonic Plastic seamless welding fixture and welding method thereof

Technical field

The present invention relates to field of plastics processing, particularly a kind of laser and Ultrasonic Plastic seamless welding fixture and welding method thereof.

Background technology

Conventional plastic welding is if ultrasonic wave, hot plate, laser weld etc. are when welding two plastic components, inevitably at two workpiece faying faces, there is flash or gap, cause the Plastic Welding part commissure after welding have plastics to overflow or have gap, appearance looks elegant and the uniformity of plastic product after impact welding.The easy flash of conventional plastic weld appearance part seam crossing weld seam, or there is gap after welding.

Traditional welding technique need to apply welding pressure for commissure, a kind of situation: in the situation that weld seam is narrow, and weld seam melt-through, under the effect of pressure, plastics can overflow gap, and forming overflows chats; Another kind of situation: design and hide the plastics that overflow by weld seam, but still have gap in appearance after workpiece welding, affect product integraty, and, because needs overflow the design of plastics bin, butt welded seam width requirement is higher, and this realizes quite difficulty on some micro parts.

Traditional Plastic Welding installation way is not considered whether flash of weld seam, for guaranteeing that welding effect generally reserves weld seam as depicted in figs. 1 and 2.

Summary of the invention

In order to overcome above-mentioned defect, the invention provides a kind of assurance soldered place smooth, can not produce flash, the complete consistent laser of outward appearance and Ultrasonic Plastic seamless welding fixture and welding method thereof.

The present invention for the technical scheme that solves its technical problem and adopt is: a kind of laser and Ultrasonic Plastic seamless welding fixture, comprise upper locating piece and the lower locating piece of for clamping, fixing two plastics to be welded, described upper locating piece and lower locating piece clamp two plastics to be welded up and down by cylinder, the junction of described two plastics to be welded is provided with weld gap, described upper locating piece is equipped with the vertical extension of going up locating piece and lower locating piece with the side that lower locating piece is positioned at weld gap, a described extension blocks weld gap, and upper locating piece and lower locating piece are that the transparent material that allows laser or ultrasonic wave penetrate is made.

As a further improvement on the present invention, between described upper locating piece and the extension of lower locating piece, leave space.

Its welding method of laser and Ultrasonic Plastic seamless welding fixture, comprises the following steps:

One, after using respectively locating piece and lower locating piece clamping after two plastics connections to be welded, be fixed and clamped;

Two, according to the position of the weld gap after two plastics connections to be welded, select the extension of using locating piece or lower locating piece by the smooth clamping in commissure;

Three, utilize laser or ultrasonic bonding to weld the commissure of two plastics to be welded, welded locating piece and lower locating piece in cooling taking-up.

The invention has the beneficial effects as follows: the fixture after the present invention improves stops commissure outer surface with fixture, it is worked as stops plastics and overflows and guarantee that soldered place is smooth simultaneously when scolder overflows, weld seam melts forming section or all subsides, can produce enough mobile plastics and fill up space, commissure, the plastics that overflow are filled up gap originally, restriction due to fixture simultaneously can not produce flash, forms the complete consistent product of outward appearance.

Accompanying drawing explanation

Fig. 1 is one of traditional welding process schematic representation;

Fig. 2 is two of traditional welding process schematic representation;

Fig. 3 is one of welding procedure schematic diagram of the present invention;

Fig. 4 is two of welding procedure schematic diagram of the present invention;

In figure, indicate: the upper locating piece of 1-; Locating piece under 2-; 3-weld gap; 4-extension.

The specific embodiment

In order to deepen the understanding of the present invention, below in conjunction with embodiment and accompanying drawing, the invention will be further described, and this embodiment only, for explaining the present invention, does not form limiting the scope of the present invention.

Fig. 3 and Fig. 4 show respectively two kinds of embodiments of a kind of laser of the present invention and Ultrasonic Plastic seamless welding fixture, comprise upper locating piece 1 and the lower locating piece 2 of for clamping, fixing two plastics to be welded, described upper locating piece 1 and lower locating piece 2 clamp two plastics to be welded up and down by cylinder, the junction of described two plastics to be welded is provided with weld gap 3, described upper locating piece 1 is equipped with the vertical extension 4 of going up locating piece 1 and lower locating piece 2 with the side that lower locating piece 2 is positioned at weld gap 3, a described extension 4 blocks weld gap 3, and upper locating piece 1 and lower locating piece 2 are that the transparent material that allows laser or ultrasonic wave penetrate is made, between described upper locating piece 1 and the extension 4 of lower locating piece 2, leave space.

Its welding method, comprises the following steps:

One, after using respectively locating piece 1 and lower locating piece 2 clampings after two plastics connections to be welded, be fixed and clamped;

Two, according to the position of the weld gap 3 after two plastics connections to be welded, select the extension 4 of using locating piece 1 or lower locating piece 2 by the smooth clamping in commissure;

Three, utilize laser or ultrasonic bonding to weld the commissure of two plastics to be welded, welded locating piece 1 and lower locating piece 2 in cooling taking-up.

Claims

1. a laser and Ultrasonic Plastic seamless welding fixture, comprise upper locating piece (1) and the lower locating piece (2) of for clamping, fixing two plastics to be welded, described upper locating piece (1) and lower locating piece (2) clamp two plastics to be welded up and down by cylinder, the junction of described two plastics to be welded is provided with weld gap (3), it is characterized in that: described upper locating piece (1) is equipped with the vertical extension (4) of going up locating piece (1) and lower locating piece (2) with the side that lower locating piece (2) is positioned at weld gap (3), a described extension (4) blocks weld gap (3), and upper locating piece (1) and lower locating piece (2) are that the transparent material that allows laser or ultrasonic wave penetrate is made.

2. laser according to claim 1 and Ultrasonic Plastic seamless welding fixture, is characterized in that: between described upper locating piece (1) and the extension (4) of lower locating piece (2), leave space.

3. its welding method of a kind of laser as claimed in claim 1 and Ultrasonic Plastic seamless welding fixture, is characterized in that, comprises the following steps:

One, after using respectively locating piece (1) and lower locating piece (2) clamping after two plastics connections to be welded, be fixed and clamped;

Two, according to the position of the weld gap (3) after two plastics connections to be welded, select the extension (4) of using locating piece (1) or lower locating piece (2) by the smooth clamping in commissure;

Three, utilize laser or ultrasonic bonding to weld the commissure of two plastics to be welded, welded locating piece in cooling taking-up (1) and lower locating piece (2).