JPS6226192Y2 - - Google Patents

Description

[Detailed description of the invention] This invention sandwiches a superposed sheet-like workpiece between a processing horn connected to an ultrasonic vibrator and a presser roller, and applies ultrasonic vibration to the processing horn. Regarding an ultrasonic processing machine that welds workpieces by feeding the workpieces while moving the workpieces, in particular, by providing a cutting cutter having an outer diameter slightly larger than the outer diameter of the presser roller on at least one side of the presser roller. , relates to an ultrasonic processing machine that welds a workpiece and cuts or half-cuts an adjacent part of the workpiece.

This type of ultrasonic processing machine has a processing horn that vibrates ultrasonically in a direction perpendicular to the workpiece, making it difficult to feed the polymerized workpiece straight, especially along the edges of the workpiece. When the welding process is carried out, there is a problem in that the presser roller will come off the edge of the workpiece unless the operator carefully guides the workpiece.

This invention was made to eliminate these drawbacks, and one embodiment of this invention will be described in detail below.

In the figure, reference numeral 1 denotes a workbench that constitutes a part of the machine frame, and fixes the bed 2. An arm 3 is integrally formed in the upper part of the bed 2, and a motor 4 is fixed to the lower part. A pulley 5 is connected to the motor 4 and is configured to rotate a main shaft 7 supported within the arm 3 via a bed 6. A pulley 8 is fixed to the left side of the main shaft 7 in FIG.

A presser bar 12 is provided in the head portion 10 of the arm 3.
is supported to be slidable in the vertical direction, and a roller support 12a that rotatably supports the press roller 11 is fixed to the lower end of the presser bar 12. A cutter mounting plate 33 is fixed to one side of this presser roller 11.
A bottomed groove 34 is provided along the outer periphery of the mounting plate 33 between the
is formed. An O-ring 35 as an elastic body is fitted into the bottom of the bottomed groove 34, and a hollow disc-shaped cutting cutter 13 is fitted onto the outer periphery of the O-ring 35. The width of the outer circumferential surface of this cutter 13 is sufficiently smaller than the width of the outer circumferential surface of the presser roller 11, and its outer diameter is approximately several hundred microns larger than the outer diameter of the presser roller 11. When pressing force is applied towards the center, O
The ring 35 is configured to deform. A stopper 14 is fixed to the intermediate portion of the presser bar 12, and a presser spring 15 is interposed between the stopper 14 and the arm 3 to constantly press the presser bar 12 downward. A cam portion of a presser foot lifting lever 16 is in contact with the lower surface of the stopper 14, and this lever 16 is latched in the upward release position as shown in FIG. The belt 9 hung between them is loose. When the presser foot lifting lever 16 is lowered, the presser foot bar 12 is pressed downward by the presser spring 15.
As shown in FIG. 2, the presser roller 11 is pressed against a machining horn 21 and a cutter 13, which will be described later.

A frame 1a hanging downward is fixed to the lower surface of the bed 2, as shown in FIG. A pair of L-shaped supports 1 are provided on the sides of this frame 1a.
7 is fixed. A casing 19 of a vibrator assembly 18 is rotatably supported by the pair of supports 17 via bearings (not shown) about a central axis in the vertical direction. An ultrasonic transducer 20 is integrally fixed within this casing 19,
The vibrator 20 is ultrasonically vibrated in the vertical direction when high frequency power is supplied.

A processing horn 21 having a cylindrical upper portion is integrally fixed to the ultrasonic vibrator 20, and the upper end surface of the processing horn 21 is provided perpendicular to the vibration direction of the hole 21. A flat annular processed surface 22 is formed. This processed surface 22
is arranged through a circular hole 23 formed in the workbench 1 and the bed 2 so as to be on the same level as the top surface of the bed 2, and is located at a position radially away from the center of rotation of the presser roller 11 and the processing surface 22. are arranged to face each other. Further, as shown in FIG. 2, at the contact portion between the presser roller 11 and the processing surface 22, the rotational directions of the presser roller 11 and the processing surface 22 are the same, and the workpiece 32, which will be described later, is linearly moved rearward. It is configured so that it can be sent.

At the bottom of the vibrator assembly 18, a pair of current collecting rings 25 and 26 are connected to the casing 1 with an insulator 24 in between.
It is fixed so that it rotates together with 9. These current collecting rings 25 and 26 have spring contacts 27 and 28 fixed at one end to the frame 1a.
are in contact with each other, one of the contacts 27 and 28 is connected to the positive pole of a high frequency oscillator (not shown), and the other is connected to the negative pole. Further, each of the current collecting rings 25 and 26 is connected to a respective pole of the ultrasonic transducer 20.

A pulley 29 is integrally fixed to the lower end of the vibrator assembly 18. Further, a motor 3 driven in synchronization with the motor 4 is provided at the bottom of the frame 1a.
0 is fixed, and the pulley 29 is connected to a motor 30 via a heald 31.

When welding the workpieces 32 made of sheet-like thermoplastic resin materials in such a configuration, first push up the presser foot lifting lever 16 as shown in FIG.
3 in the upper position. Then, place two or more overlapping workpieces 32 between the presser roller 11 and the machining horn 21, set the machining start position, lower the presser foot lifting lever 16, and the cutter 13
When the cutter 13 is pressed against the workpiece 32 and the inner peripheral surface of the cutter 13 presses the O-ring 35, the O-ring 35's own elasticity causes the presser roller 11 to press against the workpiece 32.
The workpiece 32 is held between the pressing roller 11, the cutter 13, and the processing horn 21. When the machining start switch (not shown) is turned on in this state, a high frequency oscillator (not shown) is activated.
From the contacts 27, 28 and current collecting rings 25, 2
High frequency power is supplied to the ultrasonic vibrator 20 through the ultrasonic vibrator 20, and vertical ultrasonic vibration is applied to the processing horn 21, and the overlapped workpieces 32 are welded by the frictional heat generated by the vibration. (3rd
Part A of the figure). At this time, motors 4 and 30
The holding roller 11 and the machining horn 21 are rotated in the same direction at substantially the same speed in the machining section, and the workpieces 32 are sequentially fed and welded continuously. At this time, the workpiece 32 between the processing horn 21 and the cutter 13 is also welded in the same way, but the width of the outer peripheral surface of the cutter 13 is
, the tip of the cutter 13 is narrower than the presser roller 11 even though the O-ring 35 is in contact with the inner peripheral surface of the cutter 13.
2, and the welding condition of this part is B in Figure 3.
As shown in the figure, the thickness of the workpiece 32 becomes thinner and becomes a half-cut state. Further, as the presser roller 11 rotates, the cutter 13 also rotates, but the O-ring 35
The deformation position also moves sequentially as the cutter 13 rotates, and the cutter 13 operates as if it were eccentric with respect to the presser roller 11. The workpiece 32 processed in this manner can be easily separated from the half-cut portion shown in FIG. 3 by pulling the workpiece 32 from side to side with the processed portion in between.

FIG. 4 shows another embodiment, which has two pressure rollers 40 and 41 fixed integrally, and an O A ring 43 and a cutter 44 are stored therein. FIG. 5 shows a workpiece 45 processed according to this second embodiment, and since the half-cut part D is located in the middle of the welded part C between the presser rollers 40 and 41, this workpiece 45 When separated from the half-cut portion D, the ends of the left and right workpieces 45 can be welded at once.

In both embodiments, the welded portion by the cutters 13 and 44 was cut in half, but the cutters 13 and 4
By increasing the outer diameter of O-rings 4 or using a hard material for O-rings 35 and 43, it is possible to completely cut the workpiece during welding. Further, the shape of the outer circumferential surface of the cutters 13, 44 may be sufficiently narrower than the width of the presser rollers 11, 40, 41, and it is not necessary to form the cutters 13, 44 at an acute angle.

As detailed above, since the ultrasonic processing machine according to this invention has a cutting cutter placed adjacent to the presser roller, it is possible to cut the workpiece along the welded part, and it is possible to cut the workpiece along the welded part. It is also easy to replace the presser roller depending on the welded area. Further, since the welding part and the cutting part are very close to each other, it is possible to continuously weld and cut the workpiece along an arbitrary curve. Furthermore, since the inner peripheral surface of the cutter is brought into contact with the elastic body, even if the thickness of the workpiece is uneven, the elastic body will not be elastically deformed and will not adversely affect the machining state.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of main parts showing an embodiment embodying this invention, Fig. 2 is a partially enlarged cross-sectional view, Fig. 3 is a cross-sectional view of the workpiece, and Fig. 4 is a cross-sectional view of other parts. FIG. 5 is a cross-sectional view of a main part showing an embodiment, and FIG. 5 is a cross-sectional view of a workpiece. In the figure, 11, 40, 41 are presser rollers, 13,
44 is a cutter, 21 is a processing horn, 35, 4
3 is an O-ring (elastic body).

Claims (1)

[Claims for Utility Model Registration] A processing horn connected to an ultrasonic vibrator, and a presser roller that cooperates with the processing surface of the processing horn to clamp a sheet-like workpiece; In an ultrasonic processing machine that continuously welds workpieces while rotating a presser roller by a rotary drive machine, an ultrasonic processing machine is provided on one side of the presser roller so as to be able to rotate together with the presser roller; an annular cutting cutter having an outer diameter slightly larger than the outer diameter; and an annular elastic body disposed between the presser roller and the cutting cutter to absorb a pressing force directed toward the center of the cutter. An ultrasonic processing machine characterized by having.