FI77145C - Apparatus for the manufacture of rings, earrings and similar products - Google Patents

Description

1 77145

Apparatus for making rings, earrings and similar products. - Anordning för tillverkning av ringar, örhängen ooh liknande produkter.

The invention relates to a device for manufacturing rings, earrings and the like, which device comprises, preferably attached to a common body, a blank cutting device and a pressing device for bending a blank in the shape of an arc or a ring.

Making rings, earrings and other similar jewelry is a very skilled craft. The work is thus relatively slow and expensive. For example, making "Came" and similar ring blanks by hand is very cumbersome and time consuming. This is due to the complexity and complexity of performing the steps required to shape these ring blanks. Initially, both ends of the cut blank are split a certain distance. The split ends are then applied by turning the branches sideways as evenly as possible, e.g. with pliers. Next, the blank is bent into an arc-shaped ring blank for attaching the gemstone housing. Finally, the desired gemstone is attached to the housing. After splitting and spreading, the blank usually has to be ground to remove various burrs, and after bending, the blank must normally be polished to remove bending marks.

The purpose of the device according to the invention is to facilitate the performance of various work steps, e.g. splitting, spreading and bending, to improve the quality of work and to speed up the performance of work by reducing the need for grinding and polishing work. In order to achieve these objects, the invention is characterized by the features set forth in the characterizing part of claim 1.

The invention will now be described with reference to the accompanying drawings, in which: 2 77145

Figure 1 shows a side view of a device according to the invention

Figure 2 shows the device according to the invention the direction of arrow A of Figure 1 from the direction

Figure 3 shows a top view of a device according to the invention

Figure 4 shows some of the tools of the pressing apparatus used in the device according to the invention and

Figure 5 schematically shows the manufacturing steps of a piece of jewelery to be made with a device according to the invention.

Figures 1-3 show an embodiment of the device according to the invention. The cutting device 30 consists of a cutter body 2 fixed to the body 1, to which a replaceable cutting blade 6 and members 3, preferably eccentric members, are attached to move the blade back and forth against and away from the base 7 and from the cutting length adjusting member 15 mounted on the base 7.

The pressing apparatus 40 consists, as shown in Figures 2 and 3, of a movable body 4 mounted on the body 1, a transfer member 8 by means of which the body 4 moves vertically, a mandrel 14 associated with a gear 20 attached to the mandrel on the body side 4 and gears 21 attached to the body 1. 22 to the toothed rod 9 in the base body 13 for moving the base body 13 relative to the mandrel 14 by turning the operating lever 5 of the mandrel 14. A replaceable base 12 is mounted on the base frame, the quality of which depends on the replaceable tool 11 mounted on the mandrel 14, Fig. 4.

When the tool 11 is provided with e.g. splitting and spreading members (Fig. 4a), the base must be hard enough for the splitting and spreading work to be successful. Similarly, when using a cylindrical tool with a uniform surface (Fig. 4b) to bend the ring blank, the substrate must be sufficiently soft. The tool may also be patterned (e.g., Figure 4d), requiring a sufficiently hard substrate to pattern the ring blank, or provided with a shape that provides the desired cross-sectional shape (e.g., Figure 4c), in which case the substrate should be sufficiently soft.

Figure 5 schematically shows the manufacturing steps of a "Came" type ring. In the first step, the cutting is performed by placing the blank strip 17 on the base 7 and placing the end 17a of the blank strip against the cutting length adjusting member 15 and turning the cutting blade 6 against the base 7 by means of the blade transfer members 3. The first end of the cut blank is then placed to perform a grooving step, step 2 in Fig. 5, in the longitudinal direction of the tip of the blade 6 below the blade, after which a guide groove can be made by pushing the blade 6 sufficiently downwards. The other end of the blank is then turned under the blade 5, respectively, and grooving is performed. The grooved blank is transferred to the hard base plate 12 under the mandrel 14 of the pressing apparatus to perform the splitting and spreading step, step 3, figure 5. Initially, the tool 11 with the splitting and spreading member of Fig. 4a is placed on the mandrel 14. Then, by turning the movable body 4, the transfer member 8, the movable body 4 is lowered so that the tip of the splitting and spreading member 11 contacts the base plate 12. By inserting the first end of the grooved blank 11 against the splitting and spreading member at the guide groove and by turning the drive lever 5 of the mandrel 14, the base body 13 with its base plates and blanks moves through the gears 20, 21, 22 and the rack 9, thus causing the blank 14 to split and spread. The blank is then inverted and the other end split and spreaded accordingly. In the fourth step, according to Fig. 5, the blank is bent to the desired size by replacing the mandrel 14 with e.g. a flat cylindrical bending tool 11 according to Fig. 4b and pressing the tool 11 against the blank on a soft surface by turning the tool 11 on the soft body 4 and turning the mandrel 14 the blank displaces 4 77145 with respect to the mandrel 14 and at the same time bends into an arc. The curvature, i.e. the size of the ring, can be adjusted by means of the compressive force. Instead of a flat cylindrical tool (Fig. 4b), it is also possible to use, for example, a shaped tool according to Fig. 4c. In addition, the bending step may be preceded by patterning the blank, e.g. with the tool according to Fig. 4d, on a hard base plate.

In the manufacture of conventional rings, the first step of Figure 5, possibly patterned first, is followed directly by the fourth step.

The patterning of the blank can also be performed, for example, by replacing the cutting blade 6 with a stamping or punching tool forming the desired pattern and pressing said tool against the blank at the desired points.

Claims (7)

1. Apparatus for the manufacture of rings, earrings and related products, which apparatus comprises an advantageous cut-off device (30) fixed to a shaft (30) for a shaft together with a press system drum (40) for bending the blank. in cup or annulus, characterized in that the cutting device (30) is an eccentric cutter comprising a cutting stun (2), an eccentric means (3) for moving the cutting bit (B) forward; and back against a support (7) and. away from this, a cutting member (15) for the cutting length mounted to the support (7), that the pressing plant (40) consists of a movable body (4), a movable body (B), a mandrel ( 14) which, by means of movement means, connect to a movable support body (13), an interchangeable working tool (11) which is placed on the mandrel (14) by means of a mandrel-type lever (5) and a replaceable interchangeable support disk (1) positioned above the movable support body ( 12). 2. Apparatus according to claim 1, characterized in that the interchangeable cutting bed (6) also functions as locking means for making guide rails for splitting and spreading of ends * 3- Device according to claim 1 or 2, characterized in that, instead of the interchangeable cutting bed (6), a punching and / or chisel tool can be installed to decorate the band with different figures. Device according to any one of claims 1 to 3 *, characterized in that the actuator of the mandrel comprises a gear (20) which is attached to the outermost body (4) located at the end of the mandrel (14), which connects to the gear wheels (21, 22). a toothed rack (9) exiting from the support body (13) to displace the support body (13) in relation to the mandrel (14).