Multi-piece mold and method of making slurry distributor

Patent metadata

Field	Value
Publication number	US-10293522-B2
Application number	US-201213659600-A
Country	US
Kind code	B2
Filing date	Oct 24, 2012
Priority date	Oct 24, 2011
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

A multi-piece mold for use in a method for making a slurry distributor includes a plurality of mold segments adapted to be removably secured together. The mold segments are configured such that, when the mold segments are assembled together, the assembled mold segments define a substantially continuous exterior surface adapted to be a negative image of an interior flow region of a slurry distributor molded thereupon. Each mold segment has a maximum cross-sectional area in a plane substantially transverse to a direction of movement of the mold segment along a removal path out of a respective opening of the molded slurry distributor. The maximum cross-sectional area of each mold segment is up to about 150% of the smallest area of the interior flow region of the molded slurry distributor through which the mold segment traverses when moving along the respective removal path.

First claim

What is claimed is:

1. A method of making a slurry distributor comprising:
assembling a plurality of mold segments of a multi-piece mold to define an exterior surface of the multi-piece mold;
dipping the assembled multi-piece mold into a solution of flexible material such that at least a portion of the multi-piece mold is submersed in the solution;
removing the multi-piece mold from the solution such that a layer of solution adheres substantially around the exterior surface of the multi-piece mold;
allowing the solution to cure such that an at least partially-solidified molded slurry distributor is formed around the multi-piece mold, wherein the molded slurry distributor has an interior surface defining an interior flow region, the interior surface of the molded slurry distributor being in contacting relationship with the exterior surface of the multi-piece mold, and the molded slurry distributor defines at least two openings each in fluid communication with the interior flow region;
disassembling the multi-piece mold by removing each mold segment from the interior flow region of the slurry distributor through one of the openings of the molded slurry distributor such that each mold segment travels along a respective removal path from its assembled position in the assembled multi-piece mold out through the respective opening;
wherein each mold segment has a maximum cross-sectional area in a plane substantially transverse to the direction of movement of the mold segment along the removal path out of the respective opening of the molded slurry distributor, the maximum cross-sectional area of each mold segment being up to about 150% of the smallest area of the interior flow region of the molded slurry distributor through which the mold segment traverses when moving along the respective removal path;
wherein the slurry distributor includes a feed conduit having a first feed inlet defining one of the openings and a distribution conduit, the distribution conduit extending generally along a longitudinal axis and including an entry portion and a distribution outlet in fluid communication with the entry portion, the entry portion in fluid communication with the first feed inlet of the feed conduit, the distribution outlet defining one of the openings; and
wherein at least two mold segments are removed from the interior flow region of the slurry distributor by following a removal path through the opening of the first feed inlet and at least one mold segment is removed from the interior flow region of the slurry distributor by following a removal path through the opening of the distribution outlet.

2. The method of making a slurry distributor according to claim 1 , wherein at least two mold segments are assembled together by aligning a respective passage defined in the mold segments and inserting a connecting rod through the aligned passages to interconnect the mold segments.

3. The method of making a slurry distributor according to claim 2 , wherein each passage is aligned with at least one respective opening of the molded slurry distributor to allow for the removal of the associated connecting rod from the passage.

4. The method of making a slurry distributor according to claim 1 , wherein at least three mold segments are assembled together by inserting a connecting rod through aligned passages defined therein.

5. The method of making a slurry distributor according to claim 1 , wherein the maximum cross-sectional area of each mold segment is up to about 125% of the smallest area of the interior flow region of the molded slurry distributor through which the mold piece traverses when moving along the respective removal path.

6. The method of making a slurry distributor according to claim 1 , wherein the maximum cross-sectional area of each mold segment is in a range between greater than the smallest area of the interior flow region of the molded slurry distributor through which the mold piece traverses moving along the respective removal path and about 150% thereof.

7. The method of making a slurry distributor according to claim 1 , wherein at least a portion of the interior surface of the molded slurry distributor is substantially a negative image of at least a portion of the exterior surface of the multi-piece mold.

8. The method of making a slurry distributor according to claim 1 , wherein the first feed inlet is disposed at a feed angle in a range up to about 135° with respect to the longitudinal axis.

9. The method of making a slurry distributor according to claim 1 , wherein the feed conduit of the slurry distributor includes a second feed inlet defining one of the openings, the second feed inlet is disposed at a feed angle in a range up to about 135° with respect to the longitudinal axis.

Assignees

• United States Gypsum Co

Inventors

• Li Alfred
• Lee Chris C
• Chan Cesar
• Schenck Ronald E
• Song Weixin D
• Loring Curt
• Wittbold James
• Rago William

Classifications

• B29L2031/757

  Moulds, cores, dies · CPC title

• B29C37/0014

  by flexibly or permanently deforming undercut portions of the articles · CPC title

• B29C41/14 Primary

  Dipping a core {(B29C41/10 takes precedence)} · CPC title

• B29C41/42

  Removing articles from moulds, cores or other substrates {(B29C33/444 and B29C37/0017 take precedence)} · CPC title

• B29C33/485

  cores or mandrels (collapsible mandrels for shaping tube ends B29C57/02; collapsible mandrels for winding and joining B29C53/824) · CPC title