DE102018009512B3 - metering - Google Patents

Abstract

Dosing device, which has a supply connection part, preferably a standardized supply connection part, such as a Luersystem for connection to a preferably replaceable reservoir, preferably a cylindrical body of a syringe, cartridge, wherein the metering device comprises an eccentric screw pump whose rotor has a rotor connection device which is connected to any control Rule drive device is connected and has a preferably replaceable stator, wherein the stator is movably mounted and the rotor moves only about its own axis, wherein the metering device with the reservoir in a manageable total receiving device is receivable, so that they can be handled with one hand and preferably controllable by having device features corresponding to the geometry, anatomy of a hand.

Description

The invention relates to a metering device.

In the electronics industry, because of the miniaturization of components, devices are needed that can accurately meter adhesives in minute quantities, such as microliters and less. This requires that the adhesives are dosed as drops or caterpillar exactly to the point where the adhesive effect must unfold. In this case, no Fehlklebung arise, the e.g. damaged electronic contacts. In addition, manufacturing tolerances must be taken into account, which means that they are also compensated if necessary. Many of these metering devices are automatically operated by being controlled or regulated by a computer. However, dosing devices are also required which can be operated manually, e.g. for adhesives that bond quickly over time, such as cyanoacrylate adhesives, which are also called superglue adhesives.

Are known metering devices that operate with compressed air promote the adhesive or they promote the adhesive via a linear drive or jet process in which drops are shot quickly.

Object of the present invention is to improve the prior art and in particular to provide a metering device that can be handled with one hand and the adhesive with high or low viscosity is precisely metered and with the fast adhesive adhesives, such as cyanoacrylate can be processed.

The problem is solved by the claims.

The invention relates to a metering device, which has a supply connection part, preferably a standard supply connection part, such as a luer system for connection to a preferably replaceable reservoir, preferably a cylindrical body of a syringe, cartridge, wherein the metering device comprises an eccentric screw pump whose rotor is a preferably external rotor connection device which is connectable to any control-rule drive device and has a preferably interchangeable stator, wherein the stator is movably mounted and the rotor moves only about its own axis, wherein the metering device is receivable with the reservoir in a manageable total receiving device, such that it is handleable by having device features corresponding to the geometry, anatomy of a hand.

The metering device according to the invention comprises a housing, the metering device housing, preferably made of glass, plastic, thermoplastics such as polypropylene PP, polyethylene PE, polyethylene terephthalate PET, polyetheretherketone PEEK, polytetrafluoroethylene PTFE, which may be transparent depending on the material on. This housing has a supply connection part, which preferably has the connection to a screw connection, the corresponding counterpart of which is present in a preferably exchangeable storage container, such as a preferably cylindrical body, in the form of a filled, preferably adhesive or sealant, preferably commercially available syringe, cartridge. wherein the reservoir preferably has a piston, which is preferably pressurized by means of a spring preferably up to 6 bar. This supply connection part is preferably part of a standardized connection system, such as preferably a luer system, preferably according to ISO 80369 or DIN EN 80369-Z.

This connection system preferably has an external thread as a male cone into which the corresponding internal thread of the reservoir can engage. The supply connection part to the reservoir is preferably arranged vertically, in an axis to the rotor, the screw of the eccentric screw pump and the central axis of the opening of the reservoir or the connecting part to the reservoir can also in a preferred embodiment in an internal angle of preferably 5 ° to 65 °, ie. 5 °, 5.5 °, 6 °, 6.5 °, 7 °, 7.5 °, 8 °, 8.5 °, 9 °, 9.5 ° 10%, 10.5%, 11%, 11 , 5%, 12%, 12.5%, 13%, 13.5%, 14%, 14, 5%, 15%, 15.5%, 16, 16.5%, 17%, 17.5% , 18%, 18.5%, 19%, 19.5%, 20%, 20%, 20.5%, 21%, 21.5%, 22%, 22.5%, 23%, 23.5 %, 24.5%, 24%, 25%, 25.5%, 26%, 26.5%, 27%, 27.5%, 28%, 28.5%, 29%, 29.5%, 30%, 30.5%, 31%, 31.5%, 32%, 32.5%, 33%, 33.5%, 34%, 34.5%, 35%, 35.5%, 36% , 36.5%, 37%, 37.5%, 38%, 38.5%, 39%, 39.5%, 40%, 40.5%, 41%, 41.5%, 42%, 42.5%, 43%, 43.5%, 44%, 44.5%, 45%, 45.5%, 46%, 46.5%, 47%, 47.5%, 48%, 48, 5%, 49%, 49.5%, 50%, 50.5%, 51%, 51.5%, 52%, 52.5%, 53%, 53.5%, 54%, 54.5% , 55%, 55.5%, 56%, 56.5%, 57%, 5 7.5%, 58%, 58.5%, 59%, 59.5%, 60%, 60.5%, 61%, 61.5%, 62%, 62.5%, 63%, 63, 5%, 64%, 64.5%, 65%, preferably 25 ° to 35 ° between the legs, which form the rotor and the central axis of the opening of the reservoir, be arranged so that the reservoir is arranged laterally obliquely.

The housing has at the top a rotor connection device, which is preferably sealed with a rotor connection device seal, and a preferably following material inlet chamber whose volume is preferably 10%, 20%, 30%, 40%, 50% relative to the volume of the Drive shaft portion occupies the Förderguteingangskammer, preferably occupies 90%, 80%, 70%, 60%, 50% within the Förderguteingangskammer, that is, for example, 100% total volume of the conveyor input chamber to 90% of the volume of the drive shaft part taken, so that even 10% of the volume of the conveyor input chamber can be taken by the conveyed, that is, the more volume the drive shaft part occupies the better. In the prior art, the proportion of the volume Förderguteingangskammer for the conveyed much more, up to 9 times more. Preferably, the rotor-stator device adjoins the conveying-material inlet chamber and, at the other end, preferably the lowermost end, after the rotor-stator device, preferably has a conveying material outlet chamber, which adjoins a through-channel through which the material being pumped flows the passageway is preferably arranged in a hollow needle receiving part, preferably this passageway, through-bore, has a valve which closes the passageway, preferably in its flow, when it is not pressurized and only opens when it is pressurized. This valve may preferably be a spring-loaded ball valve.

In a preferred embodiment, if no ball valve is disposed in the passageway, the passageway terminates and is preferably located in a hollow needle receiving member having a branch at its end as a Y-shaped tail, the through-channel spring extending around the passageway and over this supports above and supported at the branch point of the Y-shaped tail below, the Y-shaped tail terminates in a Fördergutmikrokammer, which ultimately ends at a hollow needle.

The Y-shaped end piece preferably also serves as a valve; if there is no pressure on the through-channel spring, the Y-piece is closed, as its openings are preferably supported on the wall of the Fördergutmikrokammer. When pressure is applied to the through-channel spring, the passage opens to the end of the Y-shaped end piece so that the conveyed material can escape.

The hollow needle receiving part is preferably made of glass, plastic, thermoplastics such as polypropylene PP, polyethylene PE, polyethylene terephthalate PET, polyether ether ketone PEEK, polytetrafluoroethylene PTFE, which may be transparent depending on the material.

The hollow needle is preferably mounted in the preferably spring-supported hollow needle receiving part at the end of the passage, preferably via a Lueranschluß, with which the hollow needle can be attached with its external thread in the internal thread of the Luer connection on the hollow needle receiving part. As a conclusion, end point is preferably a hollow needle, preferably made of polytetrafluoroethylene or ceramic, with a diameter of preferably 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.19 mm, 0.2, 0.2 mm, 0 , 3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, with which a pinpoint dosing is possible.

Venting of the housing is preferably carried out via an opening in the conveyor input chamber.

In particular, an eccentric screw pump according to the invention is provided with a movable stator, a rotor, eccentric worm, which is preferably arranged only about its own axis, which is arranged in this stator, a drive shaft and a drive. The drive shaft can transmit a rotational movement from the drive to the eccentric screw and has an area which is designed to be relatively rigid or made of a relatively rigid material.

Inside, the metering device housing has an eccentric screw pump which has a rotor, that is to say a worm and a stator. The rotor is preferably drivable in the interior via a rigid drive shaft. In this case, the very short drive shaft is preferably, viewed axially, opposite the rotor, so the eccentric screw axially straight, the drive shaft may be preferably connected to a control unit which controls a motor with how many revolutions the drive shaft per unit time to rotate and preferably preferably regulates or controls when the drive shaft starts and when it stops. For this purpose, the rotor has a drive shaft with a preferably external rotor connection device for the shaft. This drive shaft portion within the meter body preferably constitutes 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15% of the length of the unit Drive shaft and rotor, so that the actual rotor is preferably 97%, 96%, 95%, 94%, 93%, 92%, 91%, 90%, 89%, 88%, 87%, 85% of the total length , The unit of drive shaft and rotor may preferably be formed of several pieces, preferably of two pieces or preferably one piece.

The rotor may also be formed as a double-flighted rotor, so that the ratio between the diameter and the pitch of the first screw thread and the diameter and the pitch of the second screw thread in a range between 1.2 to 4.5, preferably 1.4 to 3.5, wherein the first delivery volume is 1.2 times to 4.5 times greater than the second delivery volume. Preferably, the first delivery volume is 1.4 times to 3.5 times greater than the second delivery volume, wherein the eccentricities of the first and second screw thread is preferably the same.

The rotor connection device may preferably be a plug connection such as a profiled shaft connection, such as a polygonal profile, serrated profile, Vielnutprofil, or a bayonet lock, a clamp closure, a universal joint, 2 be operatively connected gears, such as spur, bevel, worm, and Schraubradgetriebe be has an Oldham coupling, wherein two discs between which a third disc is mounted as a sliding joint in the form of a cross-disc, which are supported by two mutually orthogonal tongue and groove connections between the clutch hubs. There is preferably an offset between the rotor connection device and the drive shaft between the two coupling hubs. The Oldham-Kuplung runs preferably in an oil bath.

The rotor connection device preferably comprises a rotor connection seal of an elastomer, thermoplastic, such as various types of rubber, perfluororubber FFKM or FFPM, polyethylene PE, polytetrafluoroethylene PTFE, radial shaft seal, such as a shaft seal, axial shaft seal, such as a V-ring or Gammaringdichtung, a mechanical seal the rotor connection device seals against the housing.

The rotor connection device may also be preferably connected to a hand-operated ratchet. In this case, the drive shaft is preferably connected to a gear which is in operative connection with the gear which is driven by the ratchet, wherein the ratchet limits the travel of the rotor, whereby a precise amount of metering is possible. The ratchet invention preferably has interchangeable gears depending on the desired dosage per revolution to from 0.001 or 0.005 or <0.05 ml per revolution. This ratchet may preferably be drivable with a finger, such as preferably the index finger, thumb.

The rotor is preferably made of plastic, such as preferably polytetrafluoroethylene PTFE or preferably of metal, glass or ceramic. The rotor is preferably a type of round-threaded screw with preferably small pitch, preferably small pitch and preferably small core diameter formed.

The rotor preferably has 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 windings.

The rotor may, if it is made of metal, preferably have a coating, such as a coating, preferably of polytetrafluoroethylene PTFE, which repels the substances to be conveyed, so that they preferably do not stick firmly.

The stator has over the rotor with N threads, where N is an integer greater than 1, at least one more thread, so the stator has N plus 1 threads and preferably at least twice the pitch length. As a result, delivery spaces, which move continuously from the inlet to the outlet side, remain between the stator and the rotor rotating therein and additionally moving radially. The stator receiving device is preferably elastic and made of a thermoplastic or elastomer. The stator is preferably formed of various types of materials such as glass, ceramic, perfluororubber FFKM or FFPM, polyethylene PE, polytetrafluoroethylene PTFE, fluororubber FKM, nitrile rubber, nitrile butadiene rubber NBR, ethylene-propylene-diene rubber EPDM or slicon rubber, wherein the stator receiving device is radial and / or axially displaceable, movably installed, suspended.

A stator made of a thermoplastic, elastomer may have a rotor with an oversize, so that the rotor can seal better with low-viscosity fluids, so that ultimately no valve is necessary.

A stator receiving device made of a thermoplastic elastomer preferably has a composite construction, preferably such that the thermoplastic elastomer part is arranged in a plastic housing such as polytetrafluoroethylene PTFE or ceramic, wherein the stator housing is preferably movably arranged in the metering device housing.

The stator may also be made of solid polytetrafluoroethylene (Teflon), PEEK, PP, PE, ceramic or glass, and thus be rigid when e.g. fast-drying adhesives, such as preferably cyanoacrylate adhesives to be pumped.

The stator is preferably mounted in the metering housing in a stator receiving device, stator suspension device formed of a flexible material, preferably different types of materials, perfluororubber FFKM or FFPM, silicone elastomer, polytetrafluoroethylene PTFE, polyethylene PE, polypropylene PP such that the stator is movably mounted and so oscillate can. The Statoraufnahmevorrichtung preferably has two jaws, which are preferably made flexible from an elastic material. These jaws preferably have a thread, an internal thread, on their turned-in side, wherein the stator or the stator housing also preferably has a thread corresponding thereto, an external thread.

The Statoraufnahmevorrichtung may also preferably be a one-piece, one-piece, flexible, movably arranged device, which is preferably made flexible from an elastic material. This one-piece Statoraufnahmevorrichtung has on its inwardly swept side a thread, an internal thread, on, wherein the stator housing also has a corresponding thread, an external thread having.

With such a structure of the stator receiving device, the stator can preferably be easily replaced by being able to be unscrewed and screwed back in again. This makes it possible to install the appropriate stator, depending on whether a highly viscous or low viscosity fluid or a Cyanakrylatklebstoffbstoff that needs to be processed quickly, to be pumped.

The metering device and the reservoir connected thereto can be arranged in a manageable overall receiving device, so that it is durable and movable with one hand. In this case, the manageable total receiving device is designed so that its characteristics correspond to the geometry, anatomy of a hand. So that the metering device receiving device with its back part or front part or on the reservoir on the trough is preferably supported between the thumb and forefinger and that the manageable metering device receiving device is preferably feasible with the tips of the thumb and index finger.

The metering device according to the invention may preferably have sensors for pressure monitoring, volume monitoring, temperature monitoring.

The metering device according to the invention may preferably have sensors for monitoring the wear and thus detect damage and possibly reorder spare parts via the Internet via the integrated electronics. In addition, a traffic light for blank or full message of the reservoir can be integrated in the metering device.

Another object of the invention is a method for producing the metering device according to the invention by preferably with its individual parts by means of an additive manufacturing method, that is, the 3D printing method preferably made of polytetrafluoroethylene PTFE, is constructed.

Another object of the invention is a method for dosing adhesives and sealants, characterized in that a dosing device according to the invention is performed in a manual recording device with one hand, with the same hand preferably a hand ratchet or a foot pedal or the other hand, the drive of the invention Metering device is controlled.

list of figures

• 1 is an overall view of the metering device according to the invention with reservoir with manageable receiving device.
• 2 is a metering device with ball closing valve.
• 3 is a metering device with closing valve.

FIG. 1

1 shows an overall view as a longitudinal section of the metering device according to the invention 1 with storage tank 2 with manageable total cradle 3 , The metering device according to the invention 1 with the reservoir 2 is made of a manageable total cradle 3 held, being over a connecting part 4 the reservoir 2 is connected, this is the reservoir 2 constructed such that a plug 5 from a reservoir spring 6 is pressurized. The supply connection part 4 to the reservoir 2 and thus also the reservoir 2 is inclined at an internal angle of 30 ° between the legs, which is the rotor 7 and the center axis of the opening of the reservoir 2 form, arranged. The storage tank 2 is thus arranged obliquely at 30 ° angle. At the dosing device 1 becomes a drive shaft 10 via a rotor connection device 9 to an eccentric screw pump 7 . 8th connected. The rotor connection device 9 is via a rotor connection seal 22 sealed. Before the eccentric screw pump 7 . 8th is the Förderguteingangskammer 11 , The eccentric screw pump according to the invention 7 . 8th has a rotor 7 and a stator 8th in a stator receiving device 12 on. The hollow needle 13 comes with a hollow needle receiving part 14 at the metering device 1 appropriate.

FIG. 2

2 shows a metering device 1 with ball closing valve 15 as a sectional view. At the dosing device 1 can be a drive shaft 10 via a rotor connection device 9 to an eccentric screw pump 7 . 8th be connected. The rotor connection device 9 is via a rotor connection seal 22 sealed. Before the eccentric screw pump 7 . 8th is the Förderguteingangskammer 11 , The eccentric screw pump according to the invention 7 . 8th has a rotor 7 and a stator 8th in a stator receiving device 12 on that in a Fördergutauskammer 16 ends, to which a passageway 17 Connects via a ball valve 15 by means of a ball valve spring 21 is closable, wherein the passageway 17 in a Fördergutmikrokammer 18 ends, to which the hollow needle 13 connects, by means of a hollow needle receiving part 14 at the metering device 2 is appropriate. For the mobility of the oscillating stator is a freedom of movement 24 provided for.

FIG. 3

3 shows a metering device 1 with closing valve as a sectional view. At the metering device, a drive shaft 10 via a rotor connection device 9 to an eccentric screw pump 7 . 8th be connected. The rotor connection device 9 is via a rotor connection seal 22 sealed. Before the eccentric screw pump 7 . 8th is the Förderguteingangskammer 11 , The eccentric screw pump according to the invention 7 . 8th has a rotor 7 and a stator 8th in a stator receiving device 12 on that in a Fördergutauskammer 16 ends. To which a passageway 17 preferably in a hollow needle receiving part 14 is arranged, wherein the passageway 17 at its end a junction as a Y-shaped tail 19 having, wherein the tail spring 20 around the passageway 17 extends and is supported above this and at the branch point of the Y-shaped end piece 19 supported in the bottom of a Fördergutmikrokammer 18 ends, which it closes when no pressure on the Endstpückfeder loads, the Fördergutmikrokammer 18 ultimately on a hollow needle 13 ends, by means of a hollow needle receiving part 14 at the metering device 1 is appropriate. For the mobility of the oscillating stator is a freedom of movement 24 provided for.

Claims (11)

Dosing device, which has a supply connection part, preferably a standardized supply connection part, such as a Luersystem for connection to a preferably replaceable reservoir, preferably a cylindrical body of a syringe or cartridge, wherein the metering device comprises an eccentric screw pump, the rotor having a rotor connection device which is connected to any control Rule drive device is connected and has a preferably replaceable stator, wherein the stator is movably mounted and the rotor moves only about its own axis, wherein the metering device with the reservoir in a manageable total receiving device is receivable, so that they can be handled with one hand and preferably controllable by having device features corresponding to the geometry and anatomy of a hand. Dosing according to Claim 1 , characterized in that the supply connection part to the reservoir is an internal angle of 5 ° to 65 ° between the legs, which form the rotor and the central axis of the opening of the reservoir, is arranged. Dosing according to Claim 1 or 2 , characterized in that the stator receiving device and the stator comprises an elastic and / or rigid material in which the rotor is running. Dosing device according to one or more of Claims 1 to 3 , characterized in that the Statoraufnahmevorrichtung is radially and / or axially displaceable. Dosing device according to one or more of Claims 1 to 4 , characterized in that the supply connection part has a thread with which the supply connection part can be screwed to the threaded receiving device of the reservoir. Dosing device according to one or more of Claims 1 to 5 , characterized in that the rotor connection device comprises a plug connection, such as a profiled shaft connection, such as a polygonal profile, a serrated profile, Vielnutprofil or gears, a universal joint, an Oldham coupling. Dosing device according to one or more of Claims 1 to 6 , characterized in that the stator, preferably a rigid material such as PTFE, PEEK, PE, PP, glass or ceramic, in which the rotor is running, wherein the stator is arranged in a rigid housing, preferably made of polytetrafluoroethylene. Dosing device according to one or more of Claims 1 to 7 , characterized in that the rotor is driven by a ratchet. Dosing device according to one or more of Claims 1 to 8th , characterized in that it has control electronics and sensors for pressure monitoring, volume monitoring, temperature monitoring and monitoring of wear and preferably over the Internet wear-related spare parts are reordered. A method of manufacturing a metering device according to one or more of Claims 1 to 9 , characterized in that it is constructed with its individual parts by means of an additive manufacturing process, such as preferably the 3D printing process preferably polytetrafluoroethylene and / or ceramic. Method for dosing adhesives and sealants, characterized in that a dosing device according to one or more of Claims 1 to 9 is guided or controlled in one manageable total receiving device with one hand or controlled by a foot pedal or the other hand, the drive of the metering device according to the invention or is driven by a ratchet.

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