CS248948B1 - Pressing unit, especially for mounting disposable injection needles by pressing - Google Patents

Abstract

The solution relates to a pressing unit, in particular for assembling disposable injection needles by pressing on an automatic assembly device with four-fold assembly. The essence of the pressing unit is that it consists of a body /6/, in which a spring-loaded inner lever /1/ is mounted, provided with a head /2/ of pressing tools /11/, and an outer pressing lever /3/ is mounted, provided with a head /4/ of pressing tools /11/ and a holder /5/, in which a locking mechanism /27/ with a stroke limiter /28/ is mounted. The pressing levers /1, 3/ are rotatably mounted on pins /7/, which have eccentric surfaces /8/ formed. The inner pressing lever /1/ is equipped with a pulley /14/ corresponding to a cam /15/. The outer pressing lever /3/ is provided with a pulley /16/ corresponding to the cam /17/. In the heads /2, 4/ of the pressing tools /11/ there are set screws /37/equipped with locking plates /40/ with screws /20/ and spring-loaded pressing tools /11/ on which are placed plates /22, 23/ equipped with sponges /24, 25/ connected via the plate /23/ and a tube /42/ with a grease nipple /26/.

Description

248948 2

BACKGROUND OF THE INVENTION The present invention relates to a molding unit, particularly for the assembly of disposable injection molds by compression molding on a four-mount automatic assembly device.

When assembling disposable injection sprays, it is necessary to ensure a firm connection of the steel spindle with the plastic head by means of an aluminum sleeve which, by deforming it on two diameters by means of the pressing tools, secures and sealing the needle in the head,

Until now, this operation uses an eight-jaw, robust, mechanically, from the bottom of the machine, by means of long pull-operated press heads, which perform two-sided four-sided sleeve diameters.

A disadvantage of this solution is that in the case of multiple assembly, which is necessary to increase the production of the assembly devices, it is necessary to install as many heads as the number of working positions is multiplied by the assembly due to the dimensions of the head.

With this grinding, the size and therefore the cost of the mounting device, the moments of inertia, the moving parts of the pressing devices and the machine as a whole, increase in shake, noise and increased energy consumption.

The aforementioned disadvantages are alleviated and the technical problem is solved by a pressing unit, namely the assembly of disposable injection needles by pressing, the principle being that it consists of a body in which a spring-loaded pressing lever is provided with a press tool head and an external pressing lever provided with a die head and a holder in which there is a locking mechanism with a stroke limiter.

Pressing levers sd rotatably mounted on pins that have eccentric surfaces created. The indenting press lever is provided with a roller corresponding to the cam. The outer presser is provided with a roller corresponding to the cam. In the tools of the dies, the set screws are provided with locking washers with screws and spring-loaded dies, on which the dowels, provided with sponges, are connected via a liner and a hose with a lubricator. The advantage of the molding unit, in particular the assembly of disposable injection needles by pressing, is that the unit only takes one working position and provides for timely needles lubrication, saving the working position a further time, thereby saving eight working positions overall.

The lever attachment system does not carry any additional force load loads into the mounting device. shock, the device is less noisy and has lower power requirements. A further advantage is also that by providing the outer lever with the locking mechanism, a more precise guiding of the assembled products is achieved by the pressing tool.

The pressing unit, in particular the assembly of disposable injection needles by pressing, is shown in the drawing, in which Figure 1 shows a partial view of the device, in figure 2 the drawing is shown in the direction S of figure 1 in the enlarged scale; FIG. 4 is a sectional view taken along line AA and FIG. Fig. C-C of Fig. 1 and Fig. 5 is a drawing of the active part of the pressing tool on an enlarged scale.

The pressing unit, in particular for the assembly of disposable injection needles, consists of a body 6 in which an inner pressing lever 7 is mounted. Spring-loaded by means of spring 18 and an externalizing lever 2 sprung by a spring 19 The inner pressing lever 2 is provided with a head 2 of pressing tools 11 and an outer pressing the lever 2 is provided with a head 4 of the pressing tools 11 and a holder 5. A locking mechanism 27 with a stroke limiter 28 is mounted in the holder 5. The inner and outer press levers 31 are rotatable on pins 7 on which eccentric surfaces 8 are formed. the pins 7 are housed in the eccentric inserts 9 and the tapered roller bearings 22 · cages 7 having an inner brass 12 around which the scale 41 is formed.

Claims (1)

OBJECT OF THE INVENTION A pressing unit, in particular for the injection molding of disposable injection needles, characterized in that it consists of a body (6) in which a spring-loaded inner pressing lever (1) provided with a die head (2) and an external pressing lever (3) provided with a pressing tool head (4) and a holder (5) in which a locking mechanism (27) with a stroke limiter (28) is mounted, the pressing levers (1 * 3) being rotatably mounted on the pins (7), having an eccentric surface (8), while the inner pressing lever (1) is provided with a roller (14) corresponding to the cam (15) and the outer pressing lever (3) is provided with a roller (16) corresponding to the cam (17), in the heads (2, 4) of the pressing tools (11) are set adjusting screws (37) provided with locking washers (40) with screws (20) and spring-loaded pressing tools (11), on which the holding inserts (22, 23) are provided by means of ducts (24, 25) connected via a shim (23) and a hose (22) to a lubricator (26).