DD268049A1 - METHOD FOR MONITORING THE ORDER OF FLOWABLE MATERIAL - Google Patents

Abstract

The invention relates to a method for monitoring the order of flowable substance, which emerges from a Duese to be moved approximately parallel to the Schichttraegeroberflaeche. The invention relates to the sensor technology and is particularly suitable for the application of adhesive. The aim of the invention is to increase the usefulness of the sensor head and to reduce the effort for the control of the fabric order. The object according to the invention is achieved by forming an approximately ring-shaped measuring spot polygon around the duplex, measuring the intensity of the radiation reflected by the surface lying in the measuring spot and the radiation transmitted through the substance emerging from the dope and comparing it with reference signals. The spot polygon is formed from a train of radiation pulses directed towards the film carrier. The applied fabric is searched by the sensor head rigidly attached to the nozzle. For this purpose, the transmitters are activated one after the other in a specific order. Fig. 1

Description

For this 3 pages drawings

Field of application of the invention

The invention relates to the monitoring of the order of flowable substance which emerges from a nozzle moving approximately parallel to the substrate surface. The invention relates to the sensor technology and is particularly suitable for the application of adhesive.

Characteristic of the known state of the art

The automatic application of flowable material, such. As adhesive, requires sensors that control this process. Optoelectronic solutions are known which use the different reflection behavior of substrate and applied substance for evaluation. So z. As a solution in which the nozzle from which the substance exits, a single optical transmitter and a receiver are assigned. The transmitter emits radiation and the radiation reflected from the applied substance or from the substrate is received. Since one sensor is firmly connected to the nozzle, no movement of the nozzle over the substrate is possible.

Only the condition "substance on a substrate" can be detected with the sensor, other states such as "substance escaped from the dusts" are not detectable.

There is no arrangement known for nozzle and sensor, which allows any relative movement between Düs3 and substrate with simultaneous monitoring of the fabric order. In the known solutions, the control process takes place separately from the order process by Einar separate device which is designed so that the relative movement between the sensor and the substrate during the control process is the same as the order process. By dia temporal separation of order and control process direct feedback on the substance order is not possible.

Object of the invention

The aim of the invention is to increase the usefulness of the sensor head and to reduce the effort for the control of the fabric order.

Presentation of the essence of the invention The object of the invention is to specify a solution which allows any relative movement between the nozzle and the substrate

allows and works without a separate control device.

According to the invention the object is achieved in that formed around the nozzle Meßfleckpolygon, the intensity of the im Measuring surface lying surface of the substrate reflected (reflection) and remittierten (remission) and by the on

The nozzle exiting material is measured by radiation (transmission) and burnt with reference signals. in the

Sensor head are at least 4 sensors, in the form of ooor several mutually twisted polygons

η sensors each form a polygon, where η> 2. The measuring spot polygon is formed from a sequence of

Radiation pulses, which are directed to the flowable material and the Schichttrf.fler formed. The applied fabric becomes

sought from the sensor head rigidly attached to the nozzle. For this purpose, the sensors are successively in certain

Sequence activated: First, a first sensor emits radiation in the direction of a first measuring spot, and a second sensor receives the from the

applied substance and / or substrate reflected and remitted radiation (hereinafter the emanating from the substance

Called radiation). Then, an (n-i) -th sensor (with a total of four sensors, a third sensor) emits in the direction of a (n-i) -th measuring spot

(third measuring spot) radiation, and an nth sensor (a fourth sensor) receives the radiation emitted by the substance. Thereafter, the nth (fourth) sensor emits radiation in the direction of an ηth (fourth) measurement spot, and the first sensor receives the from the

Substance outgoing radiation. This process is repeated according to the number of polygons, so that the beam paths, from the direction of the nozzle on

op.rächtet substance, at least one polygon (in a total of four sensors in square) form, and finally emits at least one sensor in the direction of the exiting the nozzle material radiation, and a relative to the nozzle sensor (third sensor) receives the substance transmitting radiation.

As a result, in the vicinity of the nozzle, a structurally determined area for the presence of on the Scanned substrate applied substance. The flowing between the nozzle and the substrate carrier is by means of transmission

detected.

The advantages are listed at the end of the embodiment. embodiment

The arrangement according to the invention is explained using the example of the order of adhesive. In the drawings show:

1: a three-dimensional overall view of the sensor head, with which the method according to the invention is carried out, FIG. 2: the position of the sensors in the sensor head (sectional view to FIG. 1) for six sensors with indicated beam paths

and measuring spots, FIG. 3: the measuring spots on the substrate to FIG. 2.

The adhesive 3 to be applied to a substrate 2 exits from a moving nozzle 10, whereby a fabric web 3

forms. The nozzle is surrounded by a sensor head 1, which is equipped with six sensors 4 to 9. The sensors form a regular hexagon. Each sensor consists of radiation transmitter and receiver. The transmitters and receivers are connected to one

Control and evaluation unit connected. Around the nozzle 10, a Meßfleckpolygon 11-16 is formed. The intensity of the in the respective measuring spot 11,12,13,14,15,16

surface reflected and remitted and by the emerging from the nozzle 10 fabric 3

Radiation is measured and compared with reference signals. The approximately annular Meßfleckpolygon 11-16 is from a Series of light pulses, which are directed to the flowable material 3 and the substrate 2, formed. The applied fabric

is sought by the rigidly attached to the nozzle "sensor head 1. To which the sensors successively in certain

Sequence activated: First, a first sensor 4 emits radiation in the direction of a first measuring spot 11, and the second sensor 5 receives the radiation from the

applied adhesive 3 or substrate 2 reflected and remitted radiation.

Thereafter, the second sensor 5 emits radiation toward a second measuring spot 13, and a third sensor fi receives the

from the applied adhesive 3 or substrate 2 reflected and remitted radiation.

Then the third sensor β emits radiation in the direction of a third measuring spot 15 and the first sensor 4 receives the light from the

applied adhesive 3 or substrate 2 reflected and remitted radiation, so that the beam paths from the direction of the nozzle 10 on the substrate 2 considered form an equilateral triangle.

Following this, o.g. Operation with three other sensors 7 to 9, so that the equilateral triangle is a 60 "

rotated equilateral triangle is superimposed.

In a further step, the ^r n sensor 4 emits in the direction of austretet from the nozzle 10 degrees. 1en adhesive 3 radiation and the

with respect to the nozzle 10 opposite sensor 8 receives the adhesive 3 transmitt. vende radiation. The same thing happens with the sensors 5 and 9 as well as 6 and 7.

As a result, in the vicinity of the nozzle 10, a structurally determined area for the presence of on the Layer carrier 2 applied substance 3 searched. The flowing between the nozzle 10 and substrate 2 fabric 3 is by means of Transmission detected. Advantage of the invention is the arbitrary relative movement between Cüse 10 and substrate 2 including any Position between nozzle 10 and fabric 3, whereby the possibility of direct Eir.vvirkens on the order process

exists since the results of the control not only after completion of the coating process of the entire. Components existence.

The following states can be detected with the sensor according to the invention:

- "fabric on a substrate" and

- "substance escaped from the nozzle".

Claims (4)

1. A method for monitoring the order of flowable material, which emerges from a to the substrate surface approximately parallel moving nozzle, using sensors, characterized in that a Meßfleckpolygon (11-16) formed around the nozzle (10), the intensity of from the surface in the respective measuring spot (11,12,13,14,15,16) reflected and remittierten and measured by the nozzle (10) from the material (3) trar.smittierenden radiation and vere with reference signals. 2. The method according to claim 1, characterized in that the Meßfleckpolygon (11-16) is formed from a series of Strahlungsirnpulsen, which are directed towards the substrate (2). 3. The method according to claim 1 and 2, characterized in that at least 4 sensors (4-9) are used, which are arranged in the form of one or more mutually rotated polygons, and within a polygon with η sensors, where η> 2, first a erstor sensor (4) in the direction of a first measuring spot ( 11) emits radiation and a second sensor (5) receives the radiation reflected and remitted by the applied substance (3) and / or substrate (2) (hereinafter referred to as the radiation emanating from the substance), then a (ni) -term sensor in Direction of a (ni) -th measuring spot emits radiation and an n-th sensor receives the radiation emanating from the substance, then the n-th sensor emits radiation in the direction of an η-th measuring spot and the first sensor receives the radiation emanating from the substance this process is repeated in accordance with the number of polygons so that the beam paths from the direction of the nozzle on the substrate form at least one polygon, and finally at least one sensor (4) in R the emission of the substance emerging from the nozzle (3) emits radiation and a sensor (8) lying opposite the nozzle receives the radiation transmitting the substance (3).