JPS59103975A - Pump forwarding different product at accurate ratio - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pump that delivers a plurality of different articles in precise proportions.

Delivery of several different products in precise proportions, such as composites that are polymerized under the action of reactants, such as plasters or adhesives, which are usually separated and only mixed at the time of use. There are often things that must be done.

It is known to use a single actuator for this purpose.

The actuator causes the pistons to simultaneously slide as many pistons as there are components of the mixture between the same amounts or ratios in its delivery stroke, and the cross-sectional area of the pistons is within the cylinder associated with each piston. corresponding to the required flow rates of each of the components of ω, properly adjusted therein, from which each of the components of ω flows towards the point of use through a duct provided with a non-return valve. and the actuator screw 1, on its return stroke, injects each component in each cylinder associated with each component connected via a duct to a check valve. The pistons are slid simultaneously between equal amounts or ratios, and the filling of each such cylinder is of such a type that it can be accelerated or caused by a pressure pump associated with that respective cylinder.

However, in particular, the viscosity of the product placed in one cylinder is greater than that in the other cylinder, so that the filling of that cylinder lags behind that of the second cylinder, so that at the start of delivery by the actuator piston, the cylinder is not completely filled. If the cylinder is not filled, cavitation will occur, which will cause the ratio of product delivered from the cylinder to be different from the desired one.

In order to eliminate these drawbacks, according to the invention, a pump of the conventional type described above, which delivers a plurality of different products in precise proportions, is provided with Only after all of the cylinders have been completely filled can the actuator piston be moved in the delivery direction by 6' [possible J:
Such equipment will be provided.

According to one embodiment of the invention, particularly in the hour wheel and with high reliability, such functionality of the device is provided by the actuator screws 1 to 1.
Immediately after the start of the return stroke 112 of the actuator (the connection between the actuator screw 1- and each of the cylinders is automatically disconnected and the motor The result is that the reconnection of both pistons for the steamer cylinder and the loaf does not take place until each cylinder is completely filled.

For this purpose, a switch associated with each of the screws 1 to 1 of each of the cylinders associated with each of the products, comprising a switch 1 through which each piston passes by filling with the L1-) pump;
A switch is provided which is configured not to command delivery movement of the actuator screws until closed by the pistons at the end of the stroke.

By having such a configuration, there is no need to lower the suction speed of the actuator piston to ensure complete filling of each cylinder associated with each component;
Conversely, the single stroke of the actuator piston can be fast and the downward movement to deliver the different components of the product in the required ratios.
Since it starts automatically as soon as each cylinder is all properly filled, the filling time is reduced to a minimum and is determined only by the pressure and delivery rate of the pressure pump.

The drawings in Appendix A schematically illustrate embodiments of the invention.

In this illustrated example, only two types of products have the correct ratio “C”.
Sent out.

The illustrated pump comprises an actuator in which a piston 2 moves in a cylinder 1 which is controlled in a suitable manner, as is known in the art. The sliding movement of the piston 2 is transmitted via a rod 3 and a connecting bar 4 to two pistons 5 and 6. These pistons 5.6 have a cross-sectional area proportional to the required delivery rate of the product components 7 and 8 contained in the respective cylinders 9 and 10.

Cylinders 9 and 10 are supplied to the check valve 1 from a reservoir (not shown) of these two components, possibly using a pressure pump.
The components are fed through filling ducts 11 and 12 with 3 and 14. As will be readily understood, when the piston 2 performs its delivery stroke in the direction indicated by the arrow in FIG. Flow rate products 7 and 8 are connected to delivery duct I.15 and 1 with check valves 17 and 18.
6 towards the point of use.

The pump according to the invention as shown furthermore has the advantage that, as soon as the return stroke of the piston 2 of the actuator 1 in the direction indicated by the arrow in FIG. A device is provided for disconnecting the actuator screws I and 2 from the pistons 5 and 6 of the cylinders 9 and 10.

This allows products 7 and 8 to be fed separately into cylinders 9 and 10, even if they have different viscosities.
0 are gradually and completely filled with products 7 and 8 by respective pressure pumps (not shown).

The piston 2 of the actuator 1 begins its delivery stroke in the direction of the arrow in FIG. In order to avoid starting delivery, there are two switches 19 and 20 associated with pistons 5 and 6, respectively, so that filling by the pressure pump does not cause these pistons 5 and 6 to become inflated. The above-mentioned two switches 18 and 20 are used, which are constructed so as not to conduct current for controlling the delivery stroke of the screw 1-2 until they are closed by the pistons 5 and 6 at the end of the stroke 1-○-. Ru.

It goes without saying that the embodiments described herein with reference to the accompanying drawings are only one possible embodiment and are in no way limiting, and therefore there are many more variations that do not depart from the scope of the invention. It is possible. That is, after the two cylinders 9 and 10 are completely filled, the pistons 5, 6 of these cylinders are connected to the screws 1 to 2 of the actuator 1, and conversely, the disconnection of both pistons is performed by the actuator. Any device that causes the return stroke to occur immediately after the start of the return stroke of the piston 2 can be used in the present invention, or even further, for example to limit the speed of the return stroke of the actuator piston. This prevents cavitation from forming within each cylinder during the filling process of each product, regardless of its viscosity.
IF that detects the complete filling of each of those cylinders and that all cylinders are completely filled? is I
III W-! It would also be possible to provide a device that prevents the delivery stroke of the actuator piston from occurring until 7.

[Brief explanation of drawings]

FIG. 1 shows the pump during delivery of product components, and FIG. 2 shows the pump during filling. DESCRIPTION OF SYMBOLS 1... Actuator cylinder, 2... Same screw, 3... Rond, 4... Connecting bar, 5.6... Product component filling and delivery piston, 7.8...
Product components, 9.10...Product component filling and delivery cylinder, 11.12
...Filling duct, 13.14.17.18...Check valve, 15.18...
・Output duct. Agent Hiroshi Asari

Claims (1)

[Scope of Claims] (1) A pump for delivering a plurality of different products in precise ratios, using a single actuator (1), the piston (2) of this actuator - In a-ri,
The same number of bistins as the number of components of the mixture (5, 6...
) are slid by the same m or ratio amount (■), and the cross-sectional area of those pistons is the same as each piston in (A) and the associated cylinder (9, 10...). The flow rate of each of the components, so carefully adjusted, flows from there through a duct with a check valve toward the point of use. □ and the actuator piston, on its return stroke, pumps each screw in each cylinder associated with each component coupled via a tact having a check valve to a reservoir for each component. Each component of the product to be mixed is pumped simultaneously in equal or proportionate amounts and the filling of each such cylinder can be accelerated or reversed by a pressure pump associated with that respective cylinder. A pump characterized in that it comprises a device for permitting sliding of the actuator piston in the delivery direction only after all of the cylinders associated with it have been completely filled beforehand. (2. In the pump according to claim 1, the device automatically controls the actuator screws 1 to 1 as soon as the return stroke of the piston (2) of the actuator (1) is started
2), and each of the screws (1) of each of the cylinders (9, 10...) associated with each of the products (7, 8...)
5, 6...) and reconnection of both screws for the delivery stroke of the actuator piston until each cylinder is completely filled. A pump that is characterized by the fact that it does not leak. (3) In the pump according to claim 1 or 2, each piston (5, 6, . a switch (19, 20, .
...) is provided in association with each said piston (5°6...).