JPH0849654A - Vacuum type content extracting vessel and pump device - Google Patents

Abstract

PURPOSE: To reduce the manufacturing cost of a container, reduce effect of the disposable container and a small can to environment, eliminate requirement of pouring from the can and a dram can, and facilitate replacement of the container, in an apparatus for extracting contents under vacuum pressure without generating cavitation in the contents. CONSTITUTION: This apparatus has a thin container 1 and a vacuum pump 10. A piston 4 is inserted into the container, and an outlet 7 is blocked with a seal diaphragm. The inlet 9 of the pump 10 is connected with the outlet of the container. This connection cuts a seal diaphragm 12 and opens the outlet 7. By drilling a hole in the upper part of the container and then evacuating it by means of the pump 10, the piston 4 is moved and the contents are extracted into the pump. The actuation of the piston, especially a dome-shaped portion 6, can reduce residual amount of the contents.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a device for vacuuming the contents of a container, which comprises at least one container and a pump. Especially in the field of two-component reaction systems, such as epoxies, polyurethanes, silicones and polysulphides, it is necessary to meter the components relative to one another and to dispense them.

[0002]

BACKGROUND OF THE INVENTION Traditionally, there have been two methods of mechanically performing this procedure, one using a disposable cartridge having a volume of up to about 600 ml which allows for metering and mixing of the two pre-filled components. Another method is to use a mixing and dispensing machine, which mainly requires pouring the chemical components separately from disposable cans and drums with a size of 1 liter to 25 liters into metering and mixing machine containers. In the latter method, the pouring of these typically viscous and thixotropic chemicals results in the undesired entrainment of air in the chemicals. Although this description describes the handling of two components, the invention is equally well applicable to one component containers and pumps, as well as devices with more than one component and container.

[0003]

SUMMARY OF THE INVENTION Based on the above technical situation, the object of the present invention is to remove the contents by vacuum pressure without causing cavitation in the contents. It is an object of the present invention to provide a device that reduces the manufacturing costs of the container, reduces the environmental impact of disposable containers and small cans, and eliminates the need to pour from cans and drums. This object is achieved by the features of claim 1. In the preferred embodiment, unwanted air entrainment is eliminated.

The invention is explained in more detail below with reference to the drawings of an embodiment.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 1A, there is shown a cylindrical container 1 having a removable seal lid 2 which is sealed by a lip 3. The piston 4 has a skirt 5 and is slidably fitted inside the container 1. The length of the skirt 5 is a length that seals the piston 4 and holds it so as not to tilt. Although not required, the center of the piston 4 preferably has a protruding dome-shaped portion 6 adapted to fit within the shape of the outlet 7 of the container to form an interference fit between the two parts. , To allow maximum distribution of materials.

In the description of the invention, the interface of the outlet 7 of the container 1 is defined as the plane between the material in the pump inlet 9 and the material in the outlet 7 of the container. It is important that no gas or air enters the pump inlet when changing the container. The connecting means 8 comprises a plug-in or screw-in connecting part 24, which fits into a mating member 25 at a pump inlet 9 mounted on the pump body 10. An example of a small metering mix containing such a pump is described in European Patent Application No. 94810001.1. The outlet 7 of the container comprises a fitting 11B which prevents an excess amount of material from rising up to the plug-in part and an airtight means 11 which prevents air from entering the pump. For this purpose, the outlet 7 of the container forms a fitting part 11B together with the corresponding member of the inlet 9 of the pump body, and likewise uses a seal ring 11 as a seal in the pump inlet 9 to provide a vacuum pressure-tight seal. Is formed.

The container interface 80 includes a container exit sealing surface 12 of injection molded or welded plastic foil or foil laminate which replaces an empty container with a full container. All are pressed against the surface of the residual liquid at the pump inlet to prevent air from entering during connection and to drain excess liquid and air from the circular discharge passage 13 through the extraction hole 13A and valve 17. The above-mentioned discharge passage is arranged between the fitting portion 11B and the seal ring 11.

In use, the sealing surface 12 must be somewhat open and therefore the pump or its interface must include means to enable this operation. As one means, the sealing surface can be broken by the vacuum pressure generated by the metering pump. As an alternative to the preferred embodiment of the invention, the sealing surface is partially rotated relative to the cutting device 14 when fitting the container 1 to the pump inlet 9. The cutting device can be one knife or several knives, one tooth or several teeth.

The inlet end of the container is closed by a seal lid 2, which includes a pierceable portion 18,
The atmospheric pressure can be maintained above the piston 4 when the content 15 of the chemical substance therein is extracted by the vacuum pressure by the pump action in the pump body 10. Although not shown, the seal lid 2 having a plug-like plug member can be provided.

The piston 4 follows the contents of the chemical substance 15 when it is extracted into the pump, prevents cavitation in the container, and at the same time removes the chemical substance remaining on the inner wall surface of the container. Minimize. Finally, the piston is pulled out to the limit of its range of motion,
The domed portion facilitates the complete evacuation of chemicals from the container. The wall 1W of the container 1 is preferably made of a plastic material and the position of the piston is preferably translucent or transparent so that the container is always visible through the wall. A graduation line 27 is arranged on the outer surface of the container so that it can always indicate the remaining amount of the chemical substance in the container during use.

During the refilling stroke of the pump, the piston 4 is subject to the differential pressure between the vacuum pressure in the container and the atmospheric pressure behind the piston. In the preferred embodiment, this pressure differential causes the upper sealing lip 16A of the piston skirt 5 to bulge outwardly, helping to seal the piston 4. The lower piston skirt lip 16B slides on the container wall as the piston moves downwards. The pressure differential between the inside and the outside of the container during pumping will slightly compress the container wall, creating a tighter fit between the inner container wall and the piston skirt lip 16B, improving the sealing action.

FIG. 1 (B) shows a variation of FIG. 1 (A), which shows an alternative sealing structure which is a plastic foil or foil laminated diaphragm 19 welded to the container at the wide inlet end of the container. Including, this seal can be easily pierced to allow atmospheric release of the container.

An alternative is shown in FIG. 2A, in which the container 20 includes an alternative shaped connecting means 21, which connects the cylindrical wall 23 of the container and the corresponding wide pump inlet 26. 1A and 1B, the interface 80 is constructed in the same plane as the previous embodiment. There is. Fitting portion 11B, seal ring 11, discharge passage 13, extraction hole 13A and valve 1
7 is the same as the previous embodiment. This embodiment includes variations of the container inlet and sealing means as in the previous embodiment.

As mentioned above, the surface of the piston facing the container may be flat. As yet another alternative,
The container 20 of FIG. 2 (B) does not include a piston and is intended to use a low viscosity liquid.

FIG. 3 shows yet another embodiment with a large container 30, which includes a piston 31 having a skirt 29 and a dome-shaped portion 32, although the piston 31 has another shape. Can be omitted or omitted. The inlet end of this container is closed by a seal lid 33. In this case with a large container and thus a large piston, it may be useful to supply low pressure air to the back of the piston to overcome friction losses when transferring liquid to the pump. For this purpose, the sealing lid 33 comprises a sealed air inlet 34. Fitting portion 11B, seal ring 11, discharge passage 13, extraction hole 13
A and the valve 17 are the same as those in the previous embodiments. This embodiment also includes a modification of the container inlet end seal means as in the previous embodiment.

If a large container is mounted on a stand or rucksack, a pipe or hose 35 needs to be connected to the pump inlet 9. In the first variant, the pipe or hose 35 is fixedly connected to the pump inlet 10 and the interface 81 is arranged between the outlet 36 of the container and the inlet end 37 of the pipe or hose. The inlet end 37 of the hose comprises a connecting member 38 having a rib 39 and a ring 40 for holding the hose 35.

The connecting means 41 and 42 at the outlet end of the container and at the inlet end of the pipe or hose, respectively, are of the plug-in or screw-in type, as in the previous embodiment. This embodiment also has various container inlet end sealing means as in the previous embodiment. FIG. 3 shows a collection plate 43
Is further shown, and the collecting tray is arranged below the discharge passage 13. If this collection dish has a suitable volume,
The valve 17 can be omitted.

A pipe or hose 35 is fastened directly to the outlet of the container and a coupling member 38A having a rib 39 and a ring 40 at the outlet end 44 of the hose 35 and a coupling cooperating with that member 42A at the pump inlet 9. Part of the means 41
It would be appropriate to have a flange forming A. In this case, the interface 82 is located between the outlet end 44 of the pipe or hose and the pump inlet 9. Interfaces 81 and 82 both comprise an upper sealing surface 12 of injection molded or welded plastic foil or foil laminate which is pressed against the surface of the liquid remaining in the pump or pipe or hose inlet. , Whereby a pipe or connecting member 38 or 38
Either A or the pump inlet 9 is equipped with a cutting device 14.

From the above description, the pipe or hose 35
Can be connected to the container and pump inlet via connecting members 41 and 42.

Therefore, a chemical packing device is provided which is directly attached to the metering mixer in order to eliminate pouring out and to allow the package to be replaced without air entrapment, the basis of which in the end is However, it can be applied to any size container and uses the vacuum pressure generated by the pump to withdraw the contents in an effective manner. This vacuum transfer allows the use of thin walled containers, as opposed to the thick walls required for cartridges and containers under pressure up to 15 bar. For example, in a typical cartridge / container with a diameter of 70 mm and a pressure of 10 bar, the wall thickness is about 40.
%, And if it is operated by vacuum transfer, it becomes 1/3 to 1/2 as a whole. Moreover, the container can be refilled by a relatively simple facility by a professional user and reused as needed, thus the content / container weight ratio for both cartridge and can / container, and improved disposal. / In terms of usage ratio, the impact on the environment is reduced from the point of relatively saving.

[Brief description of drawings]

FIG. 1 is a sectional view of two modified examples of the first embodiment of the present invention.

FIG. 2 is a sectional view of two modifications of the second embodiment of the present invention.

FIG. 3 is a sectional view of a third embodiment of the present invention.

[Explanation of symbols]

 1, 20, 30 Container 2, 33 Seal Lid 4, 31 Piston 5, 29 Skirt 6, 32 Dome Part 7 Outlet End 8, 21 Connecting Means 9, 26 Pump Inlet 10 Pump Main Body 11 Sealing Means 12 Diaphragm 13 Discharge Passage 13A Extraction hole 14 Cutting device 15 Contents 16A, 16B Seal lip 17 Valve 19 Plastic foil or foil laminated material diaphragm 35 Pipe / hose 37 Inlet 39 Rib 40 Ring 80, 81, 82 Interface

Claims (18)

[Claims] 1. A device comprising at least one container and a pump, for drawing out the contents of the container under vacuum pressure, wherein the container (1, 20, 30) is an inlet (9, 26) of the pump body (10), Or a pipe or hose (35) connected to the inlet (9, 26) of the pump body (10)
A device which is removably attached to the outlet end of the outlet (7). 2. The device according to claim 1, wherein the cylindrical wall (1W, 23) of the container (1, 20, 30) is thinner than the wall of an equal diameter cartridge for a pressure-applied dispensing device. A device characterized by. 3. A device according to claim 1 or claim 2, wherein the container (35) or pipe or hose (3).
5) Interface (8) at the outlet end (7) of the container
0, 81, 82) includes a vacuum airtight sealing means (11), a diaphragm (12) closing the outlet end, and a connecting means (8, 21) for the interface (80, 81, 82).
Tightening means (2) for cooperating with corresponding parts (25, 22A, 42, 42A) at inlet (9, 26) of pump body (10) or inlet (37) of pipe / hose (35)
4, 22, 41, 41A). 4. A device according to claim 3, wherein the tightening means comprises a reduced diameter outlet end (7) of the container and a corresponding pump inlet (9) or inlet (3) of the pipe / hose (35).
7) or a plug-in or screw-fastening device (24, 25; 22, 22A, 41, 41A, 4) arranged on the cylindrical surface (23) of the container and the corresponding pump inlet (26)
2, 42A). 5. The apparatus according to claim 3, wherein the sealing diaphragm is an injection molded or welded plastic foil or foil laminate (12), the container being rotated when fitted to the pump inlet. The foil or foil laminate is damaged by the pump or the inlet (9,26; 3) of the pump or pipe / hose (35).
Device suitable for being opened by the cutting device (14) of 7). 6. Device according to claim 5, characterized in that the cutting device (14) comprises at least one knife or at least one cutting tooth. 7. A device according to any one of claims 1 to 6, wherein the inlet end of the container (1, 20, 30) is removable with a sealing lid (2, 33) or A device characterized by being covered with a diaphragm (19) of plastic foil or foil laminate. 8. Device according to claim 7, characterized in that the sealing lid (2, 33) comprises a pierceable part (18) or a removable plug-like plug member. 9. The apparatus according to claim 1, wherein the content (15) is a pump (1).
0) A device characterized in that the container (1, 20, 30) comprises pistons (4, 31) which follow their contents when withdrawn into (0). 10. Device according to claim 9, characterized in that the piston (4, 31) is slidably engaged in the container. 11. Device according to claim 9 or 10, characterized in that the skirt (5,2) of the piston (4,31).
9) has a seal lip (16A, at least one end)
16B). 12. Device according to any one of claims 9 to 11, wherein the piston (4, 31) has a projecting dome-shaped part (6, 32) on the surface facing the outlet. ,
Device, characterized in that this part is fitted to the contour of the reduced diameter outlet end (7) of the container (1, 20, 30). 13. The device according to any one of claims 1 to 12, wherein the cylindrical wall (13W, 23) of the container (1, 20, 30) is a semitransparent or transparent plastic material. A device made and comprising graduation lines (27). 14. The device according to any one of claims 1 to 13, wherein the pump inlet (9, 26) or the inlet (37) of the pipe / hose (35) is an extraction hole (13A). ) And a circular discharge passageway (13) with a valve (17), said discharge passageway interfacing with fittings (11B) at the container outlet and the pump inlet.
0, 81, 82) and a sealing means. 15. A device comprising a particularly large container according to any one of claims 1 to 14, wherein the container (30) passes through a pipe / hose (35) to a pump inlet (9). Removably connected, this connecting means (4
1, 42; 41A, 42A) between the outlet end of the container and the pipe / hose (35) fixed to the pump inlet (9), or the pipe / hose and pump inlet fixed to the outlet end of the container Device or a pipe / hose, between the outlet end of the container and the pump inlet. 16. The device according to claim 15, wherein at least one connecting member (38, 38) having a rib (39) and a ring (40) for holding a hose (35).
38A) is connected to the hose (35), and the connecting member (38, 38A) is a connecting means (41, 41A).
A device further comprising a cutting device (14) if necessary. 17. A device including a particularly large container according to any one of claims 1 to 16, wherein a piston (3) is provided for the sealing lid (32) to overcome friction losses.
A device comprising an inlet (34) for applying low pressure air to the back of 1). 18. The device according to any one of claims 1 to 13, wherein the collecting tray (43) is provided below the extraction hole (13A) of the discharge passage (13). A device characterized by the above.