EP0754095A1 - Düse zum dosierten auftragen von klebstofftropfen - Google Patents
Düse zum dosierten auftragen von klebstofftropfenInfo
- Publication number
- EP0754095A1 EP0754095A1 EP95913854A EP95913854A EP0754095A1 EP 0754095 A1 EP0754095 A1 EP 0754095A1 EP 95913854 A EP95913854 A EP 95913854A EP 95913854 A EP95913854 A EP 95913854A EP 0754095 A1 EP0754095 A1 EP 0754095A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- adhesive
- nozzle
- coating
- nozzle according
- drops
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000853 adhesive Substances 0.000 title claims abstract description 32
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 32
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 238000000576 coating method Methods 0.000 claims abstract description 22
- 239000010410 layer Substances 0.000 claims abstract description 12
- 239000002344 surface layer Substances 0.000 claims abstract description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 5
- 229910001096 P alloy Inorganic materials 0.000 claims abstract description 4
- OFNHPGDEEMZPFG-UHFFFAOYSA-N phosphanylidynenickel Chemical compound [P].[Ni] OFNHPGDEEMZPFG-UHFFFAOYSA-N 0.000 claims abstract description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 4
- 239000000758 substrate Substances 0.000 claims abstract description 4
- 230000000181 anti-adherent effect Effects 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 239000005871 repellent Substances 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
Definitions
- adhesive doses are first applied by means of a metering device arranged in a positioning unit, onto which the SD modules are then placed.
- the adhesive then hardens through exposure to temperature or UV radiation.
- the SMD-blocks are then fixed in the correct position as determined on the circuit board, 'that the electrical connection in the wave soldering, vapor phase can be produced by reflow soldering or soldering in.
- the metering devices used for applying the adhesive essentially consist of an adhesive cartridge which is arranged in a resilient holder and can be pressurized with compressed air, a metering nozzle inserted into the adhesive cartridge and a spacer assigned to the metering nozzle.
- this metering device which is arranged in the positioning unit of the SMD placement machine, is lowered until the spacer is seated on the printed circuit board, the impact caused thereby being absorbed by the adhesive cartridge being deflected.
- an adhesive drop is then pressed onto the circuit board by pressurized air with the adhesive cartridge, the amount of adhesive metered in depending on the metering time and the pressure applied to the adhesive cartridge by depends on the nozzle geometry and the viscosity of the adhesive. The dynamic viscosity in turn depends on the temperature of the adhesive.
- a cooling and / or heating device for temperature stabilization of the adhesive passed through can therefore also be assigned to the dosing nozzle (cf. EP-A-0 282 748).
- the influence of the nozzle geometry on the metered amount of adhesive is deliberately exploited by using nozzles of different sizes. However, if there are changes in the nozzle geometry due to the deposition of adhesive residues, this leads to an undesirable reduction in the amount of adhesive added.
- the dosing nozzles must therefore be cleaned or replaced at regular intervals. In order to avoid the difficult and time-consuming cleaning of the metering nozzles, plastic nozzles are also used, which after being contaminated by adhesive residues simply being thrown away and replaced by new nozzles.
- the problem specified in the invention is based on the problem of creating a nozzle for the metered application of drops of adhesive to a substrate, which can be more easily freed of adhesive residues and also enables the cleaning intervals to be extended.
- the advantages achieved by the invention are, in particular, that the anti-adhesive coating of the nozzle is not or only slightly wetted by the adhesive and that, in addition to improved dosing accuracy, a considerable extension of the cleaning intervals can also be achieved. It is to be regarded as surprising that with the small outlet-side inner diameters of the nozzles, which for example are 0.3 mm, 0.44 mm and 0.6 mm in an adhesive application station of an SMD production line, an anti-adhesive coating achieving the desired effect is applied at all can be.
- the extension of the anti-adhesive coating over the end face in the outlet area of the nozzle according to claim 2 facilitates the detachment of the adhesive drops from the nozzle. Because the entire drop of glue comes off and no glue gets stuck, this leads to a further increase in dosing accuracy.
- the embodiment according to claim 3 facilitates the temperature stabilization of the adhesive passed through the nozzle with the aid of a cooling and / or heating device due to the good heat conduction of the metal.
- the use of aluminum or aluminum alloys according to claim 4 has proven to be a particularly economical solution with a very good thermal conductivity of the metal.
- the development according to claim 5 is characterized by the particularly good antiadhesive properties of the coating consisting of polytetrafluoroethylene.
- the embodiment according to claim 6 enables the Ar-matching of an anti-adhesive surface layer to a material of the nozzle body that is otherwise not or only difficult to coat.
- nickel or nickel alloys have proven particularly useful.
- the embodiment according to claim 9 enables a permanent anti-adhesive coating which is still fully effective even after several cleaning processes.
- a layer thickness of the entire coating of approximately 10 ⁇ m has been found to be optimal.
- Figure 1 is a side view of a nozzle for the metered application of adhesive drops on a substrate and
- FIG. 2 shows a partial longitudinal section through the outlet area of the nozzle shown in FIG. 1.
- FIG. 1 shows a dosing nozzle labeled DD, which is used as a replaceable nozzle in the adhesive application station of an SMD production line.
- the dosing nozzle DD consisting of AlMgSilF28, for example, has an inner diameter in the inlet area of 4.2 mm.
- the inside diameter at the outlet end of the dosing nozzle DD is 0.44 mm. It is a medium-sized metering nozzle.
- the other two dosing nozzles used in the same adhesive application station have inside diameters of 0.3 mm and 0.6 mm at the outlet end.
- a coating B This is an antiadhesive, adhesive-repellent coating B, which is shown in FIG. 2 only in those areas in which they are required to improve the function and to simplify maintenance of the dosing nozzles DD. In fact, the coating B is applied over the entire surface inside and outside to the dosing nozzle DD.
- a coating B having a total layer thickness of approximately 10 ⁇ m consists of a base layer, which cannot be identified in more detail, and an anti-adhesive, adhesive-repellent surface layer.
- the base layer consists of a chemically applied nickel-phosphorus alloy, while polytetrafluoroethylene, which is usually referred to as PTFE for short, is applied as the surface layer.
- PTFE polytetrafluoroethylene
Landscapes
- Coating Apparatus (AREA)
- Materials For Medical Uses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9405332U DE9405332U1 (de) | 1994-03-29 | 1994-03-29 | Düse zum dosierten Auftragen von Klebstofftropfen |
DE9405332U | 1994-03-29 | ||
PCT/DE1995/000387 WO1995026237A1 (de) | 1994-03-29 | 1995-03-22 | Düse zum dosierten auftragen von klebstofftropfen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0754095A1 true EP0754095A1 (de) | 1997-01-22 |
EP0754095B1 EP0754095B1 (de) | 1998-11-11 |
Family
ID=6906693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95913854A Expired - Lifetime EP0754095B1 (de) | 1994-03-29 | 1995-03-22 | Düse zum dosierten auftragen von klebstofftropfen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0754095B1 (de) |
DE (2) | DE9405332U1 (de) |
WO (1) | WO1995026237A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11165115A (ja) * | 1997-12-04 | 1999-06-22 | Fuji Photo Film Co Ltd | 光ディスク製造用スピンコート装置 |
JP5465168B2 (ja) * | 2010-12-27 | 2014-04-09 | 日本発條株式会社 | 粘性液体供給ノズルへの潤滑性メッキ層の形成方法及び粘性液体供給ノズル |
DE102020127868A1 (de) | 2020-10-22 | 2022-04-28 | Baumer Hhs Gmbh | Klebstoffauftragsvorrichtung mit verbesserter Düse |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1219843A (en) * | 1982-11-15 | 1987-03-31 | Robert A. Kidder | Adhesive dispenser |
DE3903897A1 (de) * | 1989-02-10 | 1990-08-16 | Continental Ag | Vorrichtung zum herstellen, ver- und/oder bearbeiten von kautschukmischungen |
SE465756B (sv) * | 1990-03-02 | 1991-10-28 | Qenico Ab | Anordning foer flaeckvis applicering av loedpasta, lim, e d, paa ett substrat |
-
1994
- 1994-03-29 DE DE9405332U patent/DE9405332U1/de not_active Expired - Lifetime
-
1995
- 1995-03-22 DE DE59504226T patent/DE59504226D1/de not_active Expired - Fee Related
- 1995-03-22 EP EP95913854A patent/EP0754095B1/de not_active Expired - Lifetime
- 1995-03-22 WO PCT/DE1995/000387 patent/WO1995026237A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9526237A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1995026237A1 (de) | 1995-10-05 |
EP0754095B1 (de) | 1998-11-11 |
DE59504226D1 (de) | 1998-12-17 |
DE9405332U1 (de) | 1994-07-28 |
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