CZ303451B6 - Dispersion device application mechanism for selective application of viscous materials - Google Patents

Abstract

The present invention relates to a dispersion device application mechanism (6) for selective application of viscous materials to both organic and inorganic substrates in electronics and mechanical production, wherein the device is provided with at least one ultrasound source (1, 4) wherein the ultrasound source (1) is connected with an application capillary (2) and the additional ultrasound source (4) is located on a tank (5) containing material (3) to be applied.

Description

BACKGROUND OF THE INVENTION The present invention relates to dispensing apparatus dispensing apparatus for selectively applying viscous materials to organic and inorganic substrates in electronics and machine manufacturing.

BACKGROUND OF THE INVENTION

The pastes and adhesives deposition systems used so far, where the paste or adhesive is extruded by a compressed air or screw mechanism from the capillary to the substrate, are intended to apply deposited materials in a larger amount (0.1 mm ³ or more). However, some applications require up to two orders of magnitude lower application rate, while maintaining the accuracy of the application rate, or requiring continuous application, the functional material being applied in the form of a viscous liquid (paste) in a continuous thin line. The deposited materials are predominantly heterogeneous in composition, containing particles up to several µm in size, so basic physical conditions must be met to achieve a continuous line of 100 µm or less in width. Nowadays, this type of line in thick layer technology is created by screen printing, requiring the production of separate templates for each motif, which is time and cost-intensive.

SUMMARY OF THE INVENTION

The above drawback resolves the dispensing apparatus dispenser arrangement of the present invention for selectively applying viscous dispensing material by pressurized compressed air or a screw, wherein the dispensing apparatus is provided with at least one ultrasound source to optimize the flow rate of the dispensed material through the capillary.

The dispensing apparatus of the dispenser according to the preferred embodiment is provided with an ultrasonic source connected to the dispensing capillary (FIG. 1).

In another preferred embodiment of the dispensing device of the dispenser according to the invention, the 35 drilling device, in addition to the ultrasonic source connected to the application capillary, is additionally provided with an additional ultrasonic source located on the container (Fig. 2). The additional ultrasound source acts directly on the viscous coating material in the container. The action of two ultrasound sources enhances their effect and facilitates the flow of paste from the container into the capillary.

The dispensing apparatus with the applicator arrangement according to the invention comprising at least one ultrasonic source enables selective application of viscous material, in particular pastes and adhesives. An advantage of the dispensing apparatus dispenser arrangement according to the invention is that ultrasonication reduces the viscosity of the material, heats up the contents of the container and temporarily mixes the deposited material in the dispensing capillary. A small overpressure then passes through the paste and capillary of a smaller diameter than the existing solutions, thereby allowing a thinner and more accurate line to be formed or a smaller amount to be applied. After application of the material to the substrate, ultrasonic energy ceases to act on it, the material immediately increases its viscosity and no longer flows. This maintains the accuracy of the created pattern.

By arranging the dispensing device of the dispenser according to the invention, it is possible to apply a viscous coating material, in particular an adhesive or a paste, in an amount of less than 0.1 mm ³ or to form a continuous line with a maximum width of 100 µm. The dispenser thus prepared allows the immediate creation of various motifs not only on ceramic (inorganic) substrates, but also on organic materials (printed circuit boards, etc.). The use of this system does not require the production of separate templates for each motif, and a rapid deposition of the coating at a lower cost can be achieved.

Description of the drawings

Figure 1 shows the construction of the dispenser applicator provided with an ultrasonic source connected to the capillary.

Figure 2 shows the construction of the dispenser dispensing apparatus provided with an ultrasonic source coupled to the capillary and an additional ultrasonic source disposed on the container with the deposit of deposited material.

The following are non-limiting examples of embodiments of the invention.

DETAILED DESCRIPTION OF THE INVENTION

Example 1

Arrangement of dispensing device of dispenser with source of ultrasound

The dispensing device 6 of the dispenser according to the invention is provided with an ultrasound source 1 connected to the capillary 2, which acts to facilitate flow through the capillary 2 during application of the deposited material 3 contained in the adhesive container 5. 3 to achieve a very defined and accurate application of the adhesive to the substrate in an amount of 0.05 mm ³ .

Example 2

Arrangement of dispensing device dispenser with additional source of ultrasound

The dispensing device 6 of the dispenser according to the invention is provided with an ultrasound source 1 connected to the capillary 2, which, when applying the paste coating material 3, facilitates flow through the capillary 2. The applicator 6 is additionally provided with an additional ultrasound source 4 located on the container. 5 with paste. The additional ultrasonic source 4 placed on the container 5, which acts directly on the paste in the container 5, enhances the ultrasonic effect, facilitates the flow of the paste from the container 5 into the capillary 2 and creates a continuous line of 100 µm width.

Industrial applicability

The dispensing apparatus with the applicator arrangement according to the invention makes it possible, by means of at least one ultrasonic source, to achieve a very defined and precise application of the viscous material, in particular paste or adhesive, in volumes of less than 0.1 mm ³ and to form a continuous thin line with a maximum width of 100 µm. Thanks to the arrangement of the applicator it is possible to achieve a rapid creation of precise pattern and various motifs not only on ceramic (inorganic) substrates, but also on organic materials (printed circuit boards, etc.). The action of ultra-2 sounds allows the application of thinner layers and lines than alternative capillary technology. The process does not require the production of separate templates for each motif, and an immediate application of the coating at a lower cost can be achieved.

Claims (2)

PATENT CLAIMS Dispenser (6) of a dispenser for selectively applying viscous deposited materials (3) by pressurized compressed air through an inlet (7) or screw, wherein the dispenser (6) comprises a container (5) of deposited material (3) and a capillary (3). 2) characterized in that the applicator (6) is provided with at least one ultrasound source (1), 4) connected to the deposition capillary (2). Dispenser applicator (6) according to claim 1, characterized in that the applicator (6) is provided with an ultrasonic source (1) connected to the applicator capillary (2) and an additional ultrasonic source (4) disposed on the container (5) .