1. Method for the production of a membrane filter unit for liquid or gaseous media, the membrane filter unit having a plurality of capillary membranes open on at least one face, which are cast into a sealing layer that has hardened to form a solid head piece, in a region close to the end, with regard to the open membrane end, whereby the open membrane ends protrude on the outside of the sealing layer, wherein the sealing layer is disposed on a spacer that has a layer that is penetrated by the capillary membranes and is impermeable for the casting material that hardens to form the sealing layer,
whereby capillary membranes are inserted into the spacer with one protruding end, which spacer has a layer that is penetrated by the capillary membranes and is impermeable for casting material,
whereby a sealing layer of viscous casting material is applied to the spacer, which material fills the free space between the capillary membranes that protrude at the top of the spacer, up to a level below the membrane ends, and hardens to form a solid head piece,
whereby the spacer comprises a perforated plate in which the openings of the perforations are stretchable to insert the capillary membranes therethrough, and
whereby a capillary membrane is inserted through each of the perforation openings.
2. Method according to claim 1, wherein the ends of the capillary membranes that protrude above the spacer remain unclosed during application of the casting material.
3. Method according to claim 1, wherein the casting material is fed in at the top of the spacer, next to the capillary membranes.
4. Method according to claim 1, wherein the casting material is fed in through one or more openings of a component that accommodates the casting material.
5. Method according to claim 1, wherein the sealing layer is applied to the spacer in several layers, whereby the lower layer, in each instance, has hardened at least partially before the next layer is applied.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A solenoid actuator comprising:
a solenoid;
a plunger that is arranged substantially coaxially with respect to the solenoid;
a stator that has a substantially annular shape defining an inner circumferential face;
a cylindrical cup that is arranged radially inside of the inner circumferential face of the stator, the cup receiving the plunger such that the plunger is substantially axially slidable in the cup;
a cylindrical yoke that radially surrounds the solenoid and an outer circumference of the stator; and
a magnetic force transferring member that is axially inserted between a step portion formed in an inner circumference of the yoke and a radially outer portion of the stator to axially transfer magnetic force between the yoke and the stator,
wherein
the outer circumference of the stator radially forms a first gap with an inner circumferential face of the yoke therebetween,
the inner circumferential face of the stator radially forms a second gap with an outer circumferential face of the cup therebetween, and
the first gap is greater than the second gap.
2. The solenoid actuator according to claim 1, further comprising a bracket that includes:
a restrained portion that is restrained in the yoke to serve as the magnetic force transferring member; and
a fixed portion that externally secures the yoke,
wherein the cup includes a collar portion that radially extends outwardly from an outer circumference of the cup, and
the collar portion is disposed on an axially opposite side as the solenoid with respect to the restrained portion.
3. The solenoid actuator according to claim 2, wherein the stator is separated from the bracket.
4. The solenoid actuator according to claim 1, wherein the stator, the yoke and the plunger form a magnetic circuit to magnetically attract the plunger.
5. A solenoid valve comprising:
a solenoid actuator including,
a solenoid,
a plunger that is arranged substantially coaxially with respect to the solenoid,
a stator that has a substantially annular shape defining an inner circumferential face,
a cylindrical cup that is arranged radially inside of the inner circumferential face of the stator, the cup receiving the plunger such that the plunger is substantially axially slidable in the cup,
a cylindrical yoke that radially surrounds the solenoid and an outer circumference of the stator, and
a magnetic force transferring member that is axially inserted between a step portion formed in an inner circumference of the yoke and a radially outer portion of the stator to axially transfer magnetic force between the yoke and the stator; and
a valve body that connects to the plunger, such that the valve body is axially actuated by the plunger to open and close a fluid channel,
wherein
the outer circumference of the stator radially forms a first gap with an inner circumferential face of the yoke therebetween,
the inner circumferential face of the stator radially forms a second gap with an outer circumferential face of the cup therebetween, and
the first gap is greater than the second gap.
6. The solenoid valve according to claim 5,
wherein the solenoid actuator further includes a bracket that includes:
a restrained portion that is restrained in the yoke to serve as the magnetic force transferring member; and
a fixed portion that externally secures the yoke,
the cup includes a collar portion that radially extends outwardly from an outer circumference of the cup, and
the collar portion is disposed on a side of the valve body axially with respect to the restrained portion.
7. The solenoid valve according to claim 6, wherein the stator is separated from the bracket.
8. The solenoid valve according to claim 5, wherein the stator, the yoke and the plunger form a magnetic circuit to magnetically attract the plunger.