CA1062860A - Process and apparatus for printing or depositing material on a substrate - Google Patents
Process and apparatus for printing or depositing material on a substrateInfo
- Publication number
- CA1062860A CA1062860A CA216,793A CA216793A CA1062860A CA 1062860 A CA1062860 A CA 1062860A CA 216793 A CA216793 A CA 216793A CA 1062860 A CA1062860 A CA 1062860A
- Authority
- CA
- Canada
- Prior art keywords
- gasket
- deposited
- recess
- sealant
- substrate
- 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.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
- F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
- F16J15/122—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement generally parallel to the surfaces
- F16J15/123—Details relating to the edges of the packing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/10—Intaglio printing ; Gravure printing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A method of preparing a substrate for use by depositing or printing material in a preselected pattern onto the substrate comprises forcing the material to be deposited or printed through passages passing through the thickness of an intaglio printing plate or die, into the recessed design of the die, wherein the recess is deeper in one area than in another and/or one recess is deeper than another. There is also disclosed an intaglio printing plate for use in this method and in which the depth of one part of the recessed design is greater than another part or is greater in one recess of the design than in another recess.
A method of preparing a substrate for use by depositing or printing material in a preselected pattern onto the substrate comprises forcing the material to be deposited or printed through passages passing through the thickness of an intaglio printing plate or die, into the recessed design of the die, wherein the recess is deeper in one area than in another and/or one recess is deeper than another. There is also disclosed an intaglio printing plate for use in this method and in which the depth of one part of the recessed design is greater than another part or is greater in one recess of the design than in another recess.
Description
This invention relates to the deposition of material such for example as adhesive or sealant onto a substrate such as a gasket.
Such deposition has hitherto been achieved using an intaglio printing plate or die in which the material to be deposited is forced through holes or passages passing through the thickness of the plate into a recessed design (such a plate will hereafter be referred to as "an intaglio plate").
It is now proposed to use such plates to deposit sealant material and/or adhesive on selected areas of a gasket, such as a cylinder head gasket for an internal combustion engine. Such sealant n,aterial may have to take up both static deflections when for example a cylinder head is bolted to a crankcase and also further deflections which occur when the engine is running. The location of the areas of maximum deflection when the engine is running are not necessarily the same as those caused by static deflection. Further sealing problems arise if design limitations prevent an even distribution of the clamping bolts leaving some areas subject to a lower clamping pressure than others.
These problems are solved or minimised according to the present invention by depositing fluid material in a pre-selected pattern onto the gasket substrate by forcing the material to be deposited through passages passing through the thickness of an intaglio plate, into at least one recessed design of the plate, the depth of the recess or recesses varying whereby the deposited material is thicker in regions of the gasket which in use are subjected to low static pressure than it is in regions which in operation are subjected to high pressure. The areas of differing thickness may be separate or adjoining (i.e. one modified area may have different thicknesses in different parts).
Such a method enables the thickness of sealant ~.' -` 106Z860 macerial deposited on a gasket to be just sufficient at all places for efficient sealing. For example the height of the sealant at regions of low static pressure is thicker than at regions of high pressure and deposited sealant may be tapered in thickness to a minimum in an area adjacent a bolt hole.
Normally the depth of the recessed design is greater than the desired height of the deposited material in order to allow for such factors as the rheology of the material and the surface characteristics of the substrate. It has also been discovered that there is a relationship between the depth of the recess and the area to be deposited for any desired thickness of deposit.
The invention also extends to a gasket or other substrate modified by a method in accordance with the invention.
The invention will now be further described by way of example with reference to the accompanying drawings in which:
Figure 1 is a plan view of a gasket printed by a method in accordance with the invention;
Figure 2 is a section on the line A-A of Figure l;
Figure 3 is a section through the portion of an intaglio plate used in a method in accordance with the invention and which is adapted to produce the modified gasket of Figures 1 and 2; and Figure 4 is a diagrammatic view of apparatus suitable for employing the intaglio plate of Figure 3.
Referring to Figures 1 and 2, the portion of the gasket 2 shown in the drawing has a bore 4 surrounded by a thin metal ferrule 6. The ferrule protrudes outwardly from the plane of the gasket as can be seen in Figure 2 when the gasket is positioned in a gap between two surfaces which it is desired to seal and load is applied to the gasket. A proportion of the ``` 106Z860 load applied by bolts passing through holes 8 in the gasket to draw the surfaces together, which load acts to squeeze the gasket, merely compresses the ferrule and may be insufficient also to compress other bore ferrules or to apply effective sealing pressure around, for example, fluid channels 10, 12.
A thin back-up seal 14, of 0.075 mm thickness is provided around the ferrule 6 to provide extra thickness so that the proportion of the total load applied by the bolts compresses the seal material rather than a thicker ferrule which would be necessary if the seal material were not present; furthermore, the back-up seal may usually be hetter able to seal surface irregularities of the metal component than the metallic bore ferrule.
One seal material found to be satisfactory is a silicone compound which should not be too thick as otherwise the compression on the gasket surrounding the channels 10 and 12 would be reduced. For example, the thickness of the seal 14 may be from 0.05 to 0.1 mm.
Deposited sealant material 16 also extends around the two channels and the deposit in the area furthest from the bore should be thicker than the deposit surrounding or adjacent the bore. Best results are achieved by gradually increasing the thickness of the sealant from the bore outwardly as shown in the right hand side of Figure 2. For example the thickness along the area 16 is in the range of 0.15 to 0.2 mm.
The sealant material is deposited on to the gasket in a single operation using an intaglio plate such as that illustrated in Figure 3 in which the sealant material is forced under pressure through passages 18 passing through the thickness of the intaglio plate 20 into a recessed design generally indicated at 22 which corresponds with the required design to be deposited on to the gasket.
As will be à ppreciated the depth of the recessed design 22 has to be considerably more than the desired height of the sealant material on the gasket to allow for the viscosity and surface tension of the sealant material as well as the surface characteristics of the gasket material. Figure 3 shows the greater height of the recessed design in the plate to produce a printed sealant height which for 0.075mm is 0.33 mm and the depth of the recess to produce a sealant height of 0.175 mm is 0.63 mm.
The correlation between the depth of the recess in the plate and the sealant height on the printed substrate can be determined empirically but it has been found that there is a reasonably constant relationship between the depth of the recess in the intaglio and the area of sealant material to be deposited for any specific thickness of deposit. When the height of the deposited sealant material is to increase across one area to be deposited as is illustrated in the right hand side of Figure 2,-then as a rough rule the bottom surface of the recess in the die can be taken as a straight line between the two extremities of the height to be deposited.
Referring to Figure 4, the intaglio plate 20 is supported from an upper support plate 24 mounted on an upper press platen 26. The press platen 26 cooperates with a lower press platen 28 onto which the gasket to be modified is placed.
The sealing compound being deposited is injected through the intaglio plate 20 by a plurality of injector units 30, three such units being illustrated in Figure 4. Each injector unit supplies sealing compound to one intaglio recess 22 in the face of the plate. The injector units 30 are each supplied from a corresponding reservoir 32. Each injector unit 30 is connected to a corresponding one of the reservoirs 32 by a flexible conduit 34 which conducts compound from the reservoir to the inlet of the injector. While reservoirs 30 may be under pressure, preferably the feed from the reservoirs is a gravity feed.
The injector units may comprise a piston which works as a pump so that when the platens 26 and 28 are moved together, compound in the injectors is forced through the intaglio plate 20.
It will of course be appreciated that more than one separate area of the gasket or other substrate can be modified in one operation and that those areas can be either of uniform but differing thickness or height or vary across the area as is the case of the right hand portion of the printed material as seen in Figures 1 and 2. In this way an exactly correct amount of sealant material can be provided at any position on a gasket, for example a relatively thick sealant deposit may be provided at low pressure points, the thickness tapering to a minimum around bolt holes so that equilibrium of pressures can be established.
It will be further appreciated that the method of the invention may be used not only to deposit sealant material on to gaskets but that some parts of a substrate e.g. a gasket can be modified with one material e.g. a sealant and other parts simultaneously modified with a different material e.g.
an adhesive.
Such deposition has hitherto been achieved using an intaglio printing plate or die in which the material to be deposited is forced through holes or passages passing through the thickness of the plate into a recessed design (such a plate will hereafter be referred to as "an intaglio plate").
It is now proposed to use such plates to deposit sealant material and/or adhesive on selected areas of a gasket, such as a cylinder head gasket for an internal combustion engine. Such sealant n,aterial may have to take up both static deflections when for example a cylinder head is bolted to a crankcase and also further deflections which occur when the engine is running. The location of the areas of maximum deflection when the engine is running are not necessarily the same as those caused by static deflection. Further sealing problems arise if design limitations prevent an even distribution of the clamping bolts leaving some areas subject to a lower clamping pressure than others.
These problems are solved or minimised according to the present invention by depositing fluid material in a pre-selected pattern onto the gasket substrate by forcing the material to be deposited through passages passing through the thickness of an intaglio plate, into at least one recessed design of the plate, the depth of the recess or recesses varying whereby the deposited material is thicker in regions of the gasket which in use are subjected to low static pressure than it is in regions which in operation are subjected to high pressure. The areas of differing thickness may be separate or adjoining (i.e. one modified area may have different thicknesses in different parts).
Such a method enables the thickness of sealant ~.' -` 106Z860 macerial deposited on a gasket to be just sufficient at all places for efficient sealing. For example the height of the sealant at regions of low static pressure is thicker than at regions of high pressure and deposited sealant may be tapered in thickness to a minimum in an area adjacent a bolt hole.
Normally the depth of the recessed design is greater than the desired height of the deposited material in order to allow for such factors as the rheology of the material and the surface characteristics of the substrate. It has also been discovered that there is a relationship between the depth of the recess and the area to be deposited for any desired thickness of deposit.
The invention also extends to a gasket or other substrate modified by a method in accordance with the invention.
The invention will now be further described by way of example with reference to the accompanying drawings in which:
Figure 1 is a plan view of a gasket printed by a method in accordance with the invention;
Figure 2 is a section on the line A-A of Figure l;
Figure 3 is a section through the portion of an intaglio plate used in a method in accordance with the invention and which is adapted to produce the modified gasket of Figures 1 and 2; and Figure 4 is a diagrammatic view of apparatus suitable for employing the intaglio plate of Figure 3.
Referring to Figures 1 and 2, the portion of the gasket 2 shown in the drawing has a bore 4 surrounded by a thin metal ferrule 6. The ferrule protrudes outwardly from the plane of the gasket as can be seen in Figure 2 when the gasket is positioned in a gap between two surfaces which it is desired to seal and load is applied to the gasket. A proportion of the ``` 106Z860 load applied by bolts passing through holes 8 in the gasket to draw the surfaces together, which load acts to squeeze the gasket, merely compresses the ferrule and may be insufficient also to compress other bore ferrules or to apply effective sealing pressure around, for example, fluid channels 10, 12.
A thin back-up seal 14, of 0.075 mm thickness is provided around the ferrule 6 to provide extra thickness so that the proportion of the total load applied by the bolts compresses the seal material rather than a thicker ferrule which would be necessary if the seal material were not present; furthermore, the back-up seal may usually be hetter able to seal surface irregularities of the metal component than the metallic bore ferrule.
One seal material found to be satisfactory is a silicone compound which should not be too thick as otherwise the compression on the gasket surrounding the channels 10 and 12 would be reduced. For example, the thickness of the seal 14 may be from 0.05 to 0.1 mm.
Deposited sealant material 16 also extends around the two channels and the deposit in the area furthest from the bore should be thicker than the deposit surrounding or adjacent the bore. Best results are achieved by gradually increasing the thickness of the sealant from the bore outwardly as shown in the right hand side of Figure 2. For example the thickness along the area 16 is in the range of 0.15 to 0.2 mm.
The sealant material is deposited on to the gasket in a single operation using an intaglio plate such as that illustrated in Figure 3 in which the sealant material is forced under pressure through passages 18 passing through the thickness of the intaglio plate 20 into a recessed design generally indicated at 22 which corresponds with the required design to be deposited on to the gasket.
As will be à ppreciated the depth of the recessed design 22 has to be considerably more than the desired height of the sealant material on the gasket to allow for the viscosity and surface tension of the sealant material as well as the surface characteristics of the gasket material. Figure 3 shows the greater height of the recessed design in the plate to produce a printed sealant height which for 0.075mm is 0.33 mm and the depth of the recess to produce a sealant height of 0.175 mm is 0.63 mm.
The correlation between the depth of the recess in the plate and the sealant height on the printed substrate can be determined empirically but it has been found that there is a reasonably constant relationship between the depth of the recess in the intaglio and the area of sealant material to be deposited for any specific thickness of deposit. When the height of the deposited sealant material is to increase across one area to be deposited as is illustrated in the right hand side of Figure 2,-then as a rough rule the bottom surface of the recess in the die can be taken as a straight line between the two extremities of the height to be deposited.
Referring to Figure 4, the intaglio plate 20 is supported from an upper support plate 24 mounted on an upper press platen 26. The press platen 26 cooperates with a lower press platen 28 onto which the gasket to be modified is placed.
The sealing compound being deposited is injected through the intaglio plate 20 by a plurality of injector units 30, three such units being illustrated in Figure 4. Each injector unit supplies sealing compound to one intaglio recess 22 in the face of the plate. The injector units 30 are each supplied from a corresponding reservoir 32. Each injector unit 30 is connected to a corresponding one of the reservoirs 32 by a flexible conduit 34 which conducts compound from the reservoir to the inlet of the injector. While reservoirs 30 may be under pressure, preferably the feed from the reservoirs is a gravity feed.
The injector units may comprise a piston which works as a pump so that when the platens 26 and 28 are moved together, compound in the injectors is forced through the intaglio plate 20.
It will of course be appreciated that more than one separate area of the gasket or other substrate can be modified in one operation and that those areas can be either of uniform but differing thickness or height or vary across the area as is the case of the right hand portion of the printed material as seen in Figures 1 and 2. In this way an exactly correct amount of sealant material can be provided at any position on a gasket, for example a relatively thick sealant deposit may be provided at low pressure points, the thickness tapering to a minimum around bolt holes so that equilibrium of pressures can be established.
It will be further appreciated that the method of the invention may be used not only to deposit sealant material on to gaskets but that some parts of a substrate e.g. a gasket can be modified with one material e.g. a sealant and other parts simultaneously modified with a different material e.g.
an adhesive.
Claims (3)
1. A method of modifying a gasket by depositing thereon fluid adhesive and/or sealant material in a preselected pattern onto the gasket substrate by forcing the material to be deposited through passages passing through the thickness of an intaglio plate, into at least one recessed design of the plate, the depth of the recess or recesses varying whereby the deposited material is thicker in regions of the gasket which in use are subjected to low static pressure than it is in regions which in operation are subjected to high pressure.
2. A gasket modified by a method according to Claim 1.
3. A gasket according to Claim 2, wherein the deposited material is tapered to a minimum in areas adjacent a bolt hole.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1079/74A GB1501373A (en) | 1974-01-09 | 1974-01-09 | Process for depositing material on a gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1062860A true CA1062860A (en) | 1979-09-25 |
Family
ID=9715809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA216,793A Expired CA1062860A (en) | 1974-01-09 | 1974-12-24 | Process and apparatus for printing or depositing material on a substrate |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS50127715A (en) |
| BE (1) | BE824171A (en) |
| CA (1) | CA1062860A (en) |
| DE (1) | DE2500613A1 (en) |
| DK (1) | DK689474A (en) |
| FR (1) | FR2256836B1 (en) |
| GB (1) | GB1501373A (en) |
| IN (1) | IN143456B (en) |
| IT (1) | IT1032197B (en) |
| ZA (1) | ZA748257B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4285527A (en) * | 1980-04-25 | 1981-08-25 | Ex-Cell-O Corporation | Head gasket assembly with metal inlays |
| JPH0536135Y2 (en) * | 1990-02-01 | 1993-09-13 | ||
| DE4136625A1 (en) * | 1991-11-07 | 1993-03-04 | Daimler Benz Ag | Seal with support for elastic sealing ring - has inclined axial sealing surface to ensure even contact pressure force of sealing ring |
| DE102006027726A1 (en) * | 2006-06-16 | 2007-12-20 | Mahle International Gmbh | Sealing unit for plate-type heat exchanger, has sealing ring held in rigid carrier that is resting component of sealing unit, where carrier is made of fixed carrier material different from material of sealing ring |
-
1974
- 1974-01-09 GB GB1079/74A patent/GB1501373A/en not_active Expired
- 1974-12-24 IN IN2845/CAL/1974A patent/IN143456B/en unknown
- 1974-12-24 CA CA216,793A patent/CA1062860A/en not_active Expired
- 1974-12-30 DK DK689474A patent/DK689474A/da unknown
- 1974-12-30 ZA ZA00748257A patent/ZA748257B/en unknown
-
1975
- 1975-01-07 BE BE152203A patent/BE824171A/en unknown
- 1975-01-07 FR FR7500296A patent/FR2256836B1/fr not_active Expired
- 1975-01-08 IT IT7547568A patent/IT1032197B/en active
- 1975-01-09 DE DE19752500613 patent/DE2500613A1/en active Pending
- 1975-01-09 JP JP50005255A patent/JPS50127715A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| ZA748257B (en) | 1976-01-28 |
| IN143456B (en) | 1977-12-03 |
| FR2256836A1 (en) | 1975-08-01 |
| BE824171A (en) | 1975-07-07 |
| JPS50127715A (en) | 1975-10-08 |
| DK689474A (en) | 1975-09-08 |
| IT1032197B (en) | 1979-05-30 |
| FR2256836B1 (en) | 1978-07-13 |
| GB1501373A (en) | 1978-02-15 |
| DE2500613A1 (en) | 1975-07-10 |
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