DD268048B5 - Arrangement for monitoring the order of flowable substance - Google Patents

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 for the support surface approximately parallel to any moving nozzle. 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. There are known optoelectronic solutions that use the different reflection behavior of the substrate and the applied material for evaluation. For example, a solution in which the nozzle escaping from the material, 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 escaping from the nozzle" are not detectable. There is no arrangement known for nozzle and sensor, which allows any relative movement between the nozzle and the substrate while monitoring the stock application. In the known solutions, the control process is carried out separately from the order process by means of a separate device which is designed so that the relative movement between the sensor and the substrate during the control process is the same as in the order process. Due to the temporal separation of the order and control process, a direct reaction to the material application is not possible.

Object of the invention

The aim of the invention is to increase the utility of the sensor head and to reduce the cost of the controls of the fabric order.

Explanation of the essence of the invention

The object of the invention is to provide a solution that allows any relative movement between the nozzle and the substrate and works without a separate control device.

According to the invention the object is achieved in that the centrally arranged nozzle is surrounded by at least four sensors, the sensors are arranged in a plane in the form of an equilateral polygon, radiation receiver and transmitter represent and connected to a known control and evaluation circuit. Transmitting and receiving components may be integrated separately or in a component and coupled to optical fibers. They are arranged so that in the beam path between transmitters and receivers both the nozzle flowing between the nozzle and the substrate and the substance deposited on the substrate in a certain area in the vicinity of the nozzle are located. If the nozzle is made of a transparent material, it can be located between the sensors, otherwise it is located above the sensors. The applied fabric is sought by the sensor head rigidly attached to the nozzle. For this purpose, the sensors are activated one after the other in a specific order:

First, a first sensor emits radiation in the direction of a first measurement spot, and a second sensor receives the radiation reflected and remitted by the applied substance and / or substrate (hereinafter referred to as the radiation emanating from the substance).

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

At least one polygon (at a total of four sensors a square) form the substance considered, and at least one emits at least one

Sensor in the direction of the substance occurring from the nozzle radiation, and a relative to the nozzle opposite sensor

(third sensor) receives the radiation transmitting the substance.

As a result, in the vicinity of the nozzle, a structurally determined area for the presence of on the Scrape applied to the substrate. The material flowing between the nozzle and the substrate is irradiated

detected.

embodiment In the drawings show:

1: a three-dimensional overall view of the arrangement according to the invention with a substrate and adhesive web, FIG. 2: the arrangement of the sensors in the sensor head (sectional view to FIG. 1) with six sensors indicated

Beam paths and measuring spots, Figure 3: the measuring spots on the substrate to Fig. 2nd

The arrangement according to the invention is explained using the example of the order of adhesive. The on a support 2

applied adhesive 3 exits from a moving nozzle 10, whereby a fabric 3 is formed. The nozzle is from one

Sensor head 1 surrounded, which is equipped with six sensors 4 to 9, which form a regular hexagon, wherein the Orifice of the nozzle is located vertically above the plane of the sensors. The sensors are connected to a control

and evaluation unit connected. Each sensor consists of radiation transmitter and receiver. The applied adhesive 3 is sought by the sensor head rigidly attached to the nozzle. For this purpose, the sensors are successively in certain

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

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

Thereafter, the second sensor 5 emits radiation in the direction of a second measuring spot 13, and a third sensor 6 receives the

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

Thereupon, the third sensor 6 emits radiation in the direction of a third measuring spot 15, and the first sensor 4 receives the signal 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 by 60 °

rotated equilateral triangle is superimposed.

In a further step, the sensor 4 emits radiation in the direction of the adhesive 3 emerging from the nozzle 10, and the

relative to the nozzle 10 opposite sensor 8 receives the adhesive 3 transmitting 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 the nozzle 10 and substrate 2 including any Position between nozzle 10 and web 3, whereby also the possibility of direct impact on the order process

exists since the results of the control not only after completion of the coating process of the entire component present.

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

- "Stoffauf Schichtträger" and

- "substance escaped from the nozzle".

Claims (3)

1. Arrangement for monitoring the application of flowable substance, which emerges from a layer carrier surface approximately parallel to any moving nozzle, using optoelectronic sensors, characterized in that the nozzle (10) in the middle of at least four sensors (4-9) is arranged, the sensors lying in a plane in the form of an approximately equilateral polygon arranged and their beam paths on the one hand to the substrate and / or on the applied material, on the other hand directed to the material emerging from the nozzle, with a known control and evaluation circuit are connected and through the beam paths, which form a closed polygon on the substrate, interact with each other. 2. Arrangement according to claim 1, characterized in that the nozzle (10) consists of a material with a high transmittance. 3. Arrangement according to claim 1, characterized in that the sensors (4-9) consist of a transmitting and a receiving component or these components are integrated in a component and / or coupled to optical fibers.