Apparatus for potting membranes

• US 7,931,463 B2
• Filed: 08/05/2005
• Issued: 04/26/2011
• Est. Priority Date: 04/04/2001
• Status: Expired due to Fees

• Current Assignee: Evoqua Water Technologies LLC (Xylem, Inc.)
• Original Assignee: Siemens Water Technologies Corp (Siemens AG)
• Inventors: Zha, Fufang, Lea, Cinzia, Schnieder, Georg, Muller, Joachim, Cox, David John
• Primary Examiner(s): Daniels; Matthew J
• Assistant Examiner(s): LEYSON, JOSEPH S
• Application Number:
  US11/197,969
• Publication Number:
  US 20060110486A1
• Time in Patent Office: 2,090 Days
• Field of Search: 425/501, 425/120, 425/123, 425/127, 425/130, 425/425
• US Class Current: 425/501
• CPC Class Codes: B01D 63/0221 using a mould
• CPC Class Codes: B01D 63/0225 Multiple encapsulation layers

Abstract

An apparatus for potting membranes. The apparatus may include a mould for receiving ends of the membranes, means for forming a first layer of a curable resin material around the ends in the mould, and means for applying a second layer of a flexible resin material to the first layer prior to full curing of the first layer. The flexible resin material may be chemically reactive with the curable resin material to form an adhesive bond therebetween. A potting sleeve may be positioned within the mould. A centrifuge may receive the curable resin and/or the flexible resin material upstream of the mould.

Claims

1. An apparatus for potting an array of hollow fibre membranes, each fibre membrane comprising an end, the apparatus comprising:

a mould for receiving the ends of the hollow fibre membranes, the mould including a cavity having an upper portion with a first diameter and a base portion with a second diameter, the second diameter being greater than the first diameter, the base portion configured to hold a prepot supporting the ends of the membrane fibers during a potting process;

a source of an epoxy resin material fluidly connected to the base portion of the cavity;

a source of a polyurethane resin material fluidly connected to the upper portion of the cavity; and

means for forming a layer of the epoxy resin material around the membrane ends in the mould.

2. The apparatus according to claim 1, wherein the mould comprises separate means for flowing the epoxy resin material and the polyurethane resin material into the mould.

3. The apparatus according to claim 1, wherein the apparatus comprises a centrifuge, wherein at least one of the epoxy resin material and the polyurethane resin material is fed into the centrifuge before being flowed into the mould.

4. The apparatus according to claim 3, wherein the centrifuge comprises separate sections for receiving the epoxy resin material and the polyurethane resin material.

5. The apparatus according to claim 1, further comprising a potting sleeve within the mould to receive the resin layers.

6. The apparatus according to claim 5, wherein the potting sleeve comprises adhesion means, wherein the adhesion means assist in adhesion of at least one of the epoxy resin material and the polyurethane resin material to the potting sleeve.

7. The apparatus according to claim 5, wherein a surface of the potting sleeve in contact with at least one of the epoxy resin material and the polyurethane resin material is roughened.

8. The apparatus according to claim 5, wherein the potting sleeve comprises at least one protrusion formed on a surface of the potting sleeve in contact with at least one of the epoxy resin material and the polyurethane resin material.

9. The apparatus according to claim 5, wherein the potting sleeve comprises at least one indentation formed on a surface of the potting sleeve in contact with at least one of the epoxy resin material and the polyurethane resin material.

10. The apparatus of claim 1, wherein the polyurethane resin material is of a higher flexibility than the epoxy resin material when each is fully cured.

11. The apparatus of claim 1, further comprising a source of a flexibilizing agent.

12. The apparatus of claim 1, further comprising a temperature profile monitor configured to determine an optimal time to apply a layer of the polyurethane resin material prior to full curing of the epoxy resin material.