ES2214134A1 - Bicomponent mixing/dosing system - Google Patents

Abstract

The invention relates to a bicomponent paste-mixing/dosing system. The purpose of the invention is to provide a product (paste) which can achieve optimum performance when deposited on a pane of glass that is to be fixed to the structure of the casing of a body. The inventive system comprises a set of electrical or mechanical pumps which draw the main component or paste and the catalytic component from the respective containers thereof through pipes which are heated to between 0 DEG C and 100 DEG C. The ratio of the volumes of the aforementioned components (main component and catalytic component) is controlled and can vary from 1:1 to 100:1. All of the elements are synchronised using a PLC or PC which can be used to control the volume and speed of the flow (mm<3>/s.) of the mixture to be deposited and determine the flow rate.

Description

Mixer-dosing system bicomponent

Object of the invention

The object of the present invention patent, as expressed in the statement of this specification, it refers to a mixer-dosing system of two-component pasta with volume and speed control of mixture, this implies that to obtain a mixture of components, whose ratio to control can range from 1: 1 to 100: 1, this leads to a complication of control due to the disproportion of application volumes. Since for a volume higher the resolution is very large while for a volume Small resolution must be in very small limits. This It is linked to a mixing speed control of the two components, that must be different to obtain the product wanted.

To solve these problems has been developed the two-component mixer-dosing system of pasta, which in its configuration, presents a complete set of pumping, mixing and application with volume and flow control, before of the mixture and after mixing.

Background of the invention

Formerly the application of pastes for glued glass was done manually, by using of application guns. In this type of operations you do not It proceeded to an exhaustive control of the volume of paste applied.

Paste pastes are currently used to assemble the crystals to the body frames with different control procedures, without solving problems punctual when performing these operations.

More recently, they have proceeded to automated of these processes of application of pastes in crystals applied to the bodies of vehicles. In automation of these processes control elements have been introduced and paste volume monitoring applied with requirements greater than those existing in manual applications.

These pastas have been traditionally monocomponent, based on polyurethane, but are currently appearing bicomponent pastes, in which one acts as a matrix and the other catalyst, in order to obtain a drying and curing faster and stronger. In these two-component applications the volume control and mixing are necessary conditions for obtain optimal product behavior once applied.

Within this system, mixing must be performed inside the application nozzle. There is a range varied types of nozzles, as well as manufacturers who use Your own design, mixers, pumping equipment and premix

To solve the current inconveniences that present the paste application procedures with two-component elements, the system has been developed two-component pasta mixer-doser, mixing the components in a relationship to control that can go from 1: 1 to 100: 1, for optimal performance in behavior of the mixed paste when deposited on the glass and its fixation to the frame of the body structure, together with a control of volume and speed of the mixture.

Description of the invention

The mixer-dosing system two-component pasta, whose purpose is to obtain a product (paste), suitable for optimal behavior when deposits to fix the crystals to the frame structure of the body, the system is configured by a set of pumps dosing machines (electrical or mechanical) or gear type, a suck the main component or paste from a container or barrel, suitable for this product and, the other pump sucks the catalyst component, deposited in a suitable container, can be of less power. These components, main or paste and the catalyst, driven by their respective pumps, are taken to the Dosing and mixing station. The hose that carries the main component or paste, and the catalyst component to the Dosing and mixing station are rated between 40 ° C and 85 ° C to favor its circulation, more fluid through the hose to the pumps and the set mixer-doser,

The paste or main component is passed through an applicator and by an electric or mechanical dispenser, as well as by a metering pump (electrical or mechanical) or of the type of gears The synchronization of all these elements is done by means of a PLC, or PC, that allows to control the volume and the speed, whereby the flow rate can be determined in (mm3 / s) This PLC is responsible for maintaining the regimes within the established parameters. This flow is carried to the head of Dosing and mixing, allowing its passage through a valve of control.

The catalyst component, from its container or barrel is taken to the dosing head and mixing going through the Hose and control valve located before the dosing unit-mixer, this valve is controlled by a motor and, the motor is controlled by a PLC, and synchronized with the flow of the main component or paste, which allows to control the volume of the catalyst applied and also the flow rate.

Once the materials have been mixed in the mixing chamber, the paste passes to a mixer that distributes the two materials according to the application requirement precise.

There are two modalities of heads of application; one for use when fixed in a structure solid, because the availability of work demands it, that known by 7th axis, and the other application is when the dispenser goes mounted directly on the 6th axis of the robot.

For the 7th axis application, the spindle goes mounted on an engine, controlled by the robot (hence the name 7th axis) and, the whole engine set and mixer-mixer is mounted on a fixed structure through a base support. For application with robot the main head is mounted directly on the flange of the robot

To complete the description that follows will perform and in order to help better compression of the characteristics of the invention, is accompanied by the present specification of some plans based on whose figures will be more easily understood the innovations and advantages of the protection object of the invention.

Brief description of the drawings

Figure 1 shows a perspective view of the robot where the system is installed two-component mixer-doser, with the structure (A), fixed on the 7th axis, as well as the positioning of the Paste applicator (C), dosing pump (B), (electric or mechanical) or gear type, for volume regulation, with electric motor, dosing head (D 1), of the product Two-component for 7th axis, mixer (G), output application,  as well as the base support (F), to fix the head for 7th axis, a engine (E), which allows the rotation of the nozzle (G), synchronized With the rest of the robot.

Figure 2 shows a perspective view of the 2-component dosing head assembly for 7th axis, configured by the head support (F), the motor (E), which rotates the nozzle (G), and the dosing head (D1), as well as the positioning of the set in front and side view with partial sectioning where the motor and head assembly is shown dispenser

Figure 3 shows a view of the whole dosing head (D2), two-component for robot, with a vertical sectioned projection of the set, where the parts that configure it, as well as the transmission (T), sections A-A are independently indicated, and B-B, before and after the element of transmission.

Figure 4 shows a sectional view vertically from the two-component dosing head assembly, with head positioning (D1), or (D2), where the motor (M), which regulates the depth of the needle to control the Product volume (PB), catalyst, valve (VI), for regulate the input of the main component or paste (PA), the needle (H); as the main element of the assembly, the valve (V2); from needle, the catalyst component (PB); the camera (K); mixing, the mixer (G) with external application, appears in the set attached the head (D2), two-component doser for robot, with the  transmission set (T), independently shown the plant positioning, of two-component mixer-doser.

Figure 5 shows the scheme of the system two-component mixer-doser where indicated the positioning of all the elements that configure the system. The deposit (JA), or barrel of the main component (PA), or paste With all the suction equipment. The deposit (JB); or barrel of Catalyst component (PB), with suction equipment, These components go through hoses califugated to the whole of the mixer-dosing head (D1), or (D2) bicomponent, passing through the motors and valves (VI), and (V2), respective control regulation, before the set mixer-doser, and through a motor passes to the application mixer (G) ,. The entire system has a container (CL), which contains cleaning paste and that through hose and valve (VL) of regualción, goes to the set Mixer-doser for cleaning.

Preferred Embodiment of the Invention

The mixer-dosing system two-component pasta, is intended to obtain a suitable paste to achieve optimal behavior when deposited in the periphery of the crystals for fixing on the frame of the body structure. The system is configured by a group of dosing pumps (electrical or mechanical), which suck the main component or paste, and the component catalyst, which through hoses califugada between 40 ° C and 85 ° C These go to the control and regulation valves, subsequently the components are sent to the set mixer-doser and once the process go to the application chamber.

As shown in fig. 5, is represented the scheme with all the elements that configure the system two-component pasta mixer-doser, for applications on crystals that fit the structures of the  bodies, where the main component (PA), or paste, is deposited in the container (JA), and in this enclosure they are located All elements such as (agitator, motor, filter, etc.) for your preparation before suction, a hose (L); califugada, a metering pump (B1), (electrical or mechanical) or of the type of gears and, a valve (V1), to the inlet of the assembly (D1), or (D2), which configures the mixing tank and the dispenser.

The other component (PB), catalyst, is deposited in the container (JB), with the set of components same and indicated on the main component container, for get the necessary conditions before performing the suction, a hose (L), calibrated, a metering pump (B2), (electrical or mechanical), or the type of gears, and a valve (V2), input to the set (D1), or (D2), complete the system. A Once the components in the assembly (D1), or (D2), the Mixing and dosing, for shipment to the application chamber (G). The entire system has a container (CL), where it is deposited  the cleaning paste that is sent through the hose (LL), to the valve (VL), input to the assembly (D1), or (D2), mixer-doser for cleaning whenever required

Figure 1 shows system mixer-doser within a fixed structure (A), for 7th axis, where within its set the positioning of the applicator (C), the metering pump (B), or of type gears, to regulate the volume, as well as the set configured by the motor (E), for the rotation of the nozzle (G), synchronized with the rest of the robot, the spindle (D1), two-component doser for 7th axis, all this set is fixed to the head support (F), for 7th axis.

In figure 4 it shows the process of the pasta or main component (PA), which is impersonating an applicator and an electric or mechanical dispenser, as well as a pump (B1) dosing machine (electrical or mechanical), or gear. The synchronization of all these elements are done through a PLC equipment, which allows you to control the volume and speed, with which can determine the flow rate in (mm3 / s.). The PLC takes care of maintaining the regimes within the established parameters. This flow is carried to the head (D1), or (D2), of dosing and mixing, allowing its passage through a hose (L), Califuted between 40 ° C and 85 ° C. and its shipment to the valve (VI), control,  regulated by electric motor.

In the assembly shown in figure 4, it is indicated as the catalyst component (PB), from its container (JB), or barrel is taken to the head (DI) or (D2), dosing and mixing to through the hose (L), and its shipment to the control valve (V2) regulated by an electric motor. Said engine is commanded by a PLC and, synchronized with the flow of the main component (PA), or paste, which allows the control of the volume of the catalyst (PB), applied and its flow.

Once the main components (PA), or paste and, the component (PB), catalyst, have been mixed in the chamber (K), fig. 4, the mixture or paste passes to the chamber (G), of application that distributes the two components according to the application requirement required.

There are two modalities of heads of Application for the type of bi-component products. One when mount the mixer-doser on a structure fixed (A), as shown in fig. 1, which is called application 7th axis and another variant when the mixer-doser is mounted directly on the 6th axis of the robot.

For 7th axis application, as shown in fig. 2, the head is mounted on a motor (E), for rotation of the nozzle (G), of application, controlled by the robot (hence the 7th axis name) and, the entire engine assembly (E), and mixer-doser (D1), is mounted to the fixed structure (A), see fig. 1, through the support (F). In bliss structure is the component dosing set Main or pasta.

Figure 3 shows the positioning of the head (D2), two-component doser for robot, with location of all the elements that configure it, mainly with the axis of transmission.

Once the nature of the present invention, as well as a preferred embodiment of the same, it only remains to add that, both its form and materials and execution thereof, are susceptible to modifications, as long as they do not substantially affect the characteristics claimed below.

Claims (8)

1. Two-component paste mixer-dosing system that allows the components to function properly by mixing them up to a control ratio that can range from 1: 1 to 100: 1, together with a mixing speed control of the two components that must be different for obtaining the demanded product, characterized in that the system is configured by a pumping, mixing, dosing and application set, with volume and flow control, before mixing and after mixing. 2. Two-component paste mixer-dosing system, according to the first claim, characterized in that, the system can be mounted on a fixed structure (A), fig. 1, and the mixer-doser is connected to a motor synchronized with the robot, (7th axis), when it is necessary to fix the applicator. 3. Two-component paste mixer-dosing system, according to claim one, characterized in that the system can be mounted directly on the robot flange, corresponding to the head (D2), two-component robot doser, fig. 3. In this case there is a transmission (T), which allows the 6th axis to control the degree of rotation of the nozzle (G). 4. Two-component paste mixer-dosing system according to claim one, characterized in that, the control of the volume of the main component (PA), or paste, is maintained by synchronizing the applicator (C), electric or pneumatic, and the dispenser (B), electric or mechanical, with a PLC or PC. The volume that enters the mixing-dosing head through the valve (VI), its speed, is regulated by increasing or decreasing the pressure applied by the pump (B1), dosing (electrical or mechanical) or the type of gears, governed by the PLC. 5. Two-component paste mixer-dosing system, according to claim one, characterized in that, the volume control of the component (PB), catalyst, is carried out in the head (DI), or (D2), by means of the control of the valve (V2), needle (H), governed by the motor (M), synchronized by a PLC or PC. The speed is regulated by increasing or decreasing the pressure applied by the pump (B2), dosing (electrical or mechanical), or gear, governed by the PLC. 6. Two-component pasta mixer-dosing system according to the first, fourth and fifth claims, characterized in that the controlled volumes of the main component (PA), or paste and the component (PB), catalyst are in the chamber (K) , once the two components are mixed together in said mixing chamber, the product obtained is passed through the mixing nozzle (G), and at the outlet of the nozzle (G), the components are already properly mixed with the ratios that can range between 1: 1 to 100: 1, controlled by the PLC or PC. 7. Biconponent paste mixer-dosing system, according to the first claim, characterized in that, the hoses (L) of the system are califugated between 40 ° C and 85 ° C to reduce the viscosity of the components that circulate through them, and favor circulation to the mixer-dosing head. 8. Two-component paste mixer-dosing system, according to the preceding claims, characterized in that the system has a cleaning circuit, configured by a container (CL), where the cleaning paste is deposited, a hose (LL), which It takes the cleaning component through the pump (VL), control to the whole system to eliminate the accumulation of debris in the chamber (K), as well as cleaning the nozzle (G), of paste application.