Temperature controlled mold

Abstract

A sand based mold and method for casting a device having a cavity. The sand based mold includes a core part including grains of sand bonded with a resin, where a shape of the core part fits a shape of the cavity of the device, and a first pipe embedded into the core part and configured to allow a compressed fluid to flow through the first pipe during a solidification process of the device, the first pipe having an inlet and an outlet that exit the mold.

1 . A sand based mold for casting a device having a cavity, the sand based mold comprising:
 a core part including grains of sand bonded with a resin, wherein a shape of the core part fits a shape of the cavity of the device to be formed; and   a first pipe embedded into the core part and configured to allow a compressed fluid to flow through the first pipe during a solidification process of the device to be formed, the first pipe having an inlet and an outlet that exit the mold.   
   
   
       2 . The mold of  claim 1 , wherein the first pipe is completely embedded into the core part except the inlet and outlet. 
   
   
       3 . The mold of  claim 1 , wherein the first pipe is embedded into the sand of the core part such that a distance from the first pipe to an external surface of the core part is between about 2.5 cm to about 5 cm. 
   
   
       4 . The mold of  claim 1 , wherein the first pipe is distributed in a predetermined surface, inside the core part, that follows an external surface of the core part and a distance between the predetermined surface and the external surface of the core part is between about 2.5 cm to about 5 cm. 
   
   
       5 . The mold of  claim 1 , wherein the first pipe is uniformly distributed in a predetermined surface inside the core part. 
   
   
       6 . The mold of  claim 1 , further comprising:
 a second pipe distributed inside the core part.   
   
   
       7 . The mold of  claim 1 , further comprising:
 an external part made of the grains of sand bonded with the resin, the external part being configured to encircle the core part, wherein the external part determines an external shape of the device; and   a cooling pipe embedded into the external part and configured to cool the external part by circulating the compressed fluid.   
   
   
       8 . The mold of  claim 1 , wherein an orientation of the first pipe in the core part is related to a solidification direction of the device. 
   
   
       9 . A method for controlling a cooling process related to a part of a device that includes a cavity, the device being cast into a sand based mold, the method comprising:
 embedding a first pipe into a core part of the sand based mold, wherein a shape of the core part fits a shape of the cavity of the device;   attaching the core part to an external part, wherein the external part is part of the sand based mold;   pouring liquid material into the mold such that the cavity is formed by the core part; and   controlling the cooling process by circulating a coolant fluid through the first pipe for a predetermined period of time during a solidification process of the device.   
   
   
       10 . The method of  claim 9 , further comprising:
 completely embedding the first pipe into the core part except an inlet and an outlet.   
   
   
       11 . The method of  claim 9 , further comprising:
 mixing grains of sand with a resin to form the core part.   
   
   
       12 . The method of  claim 11 , further comprising:
 embedding the first pipe into the sand of the core part such that a distance from the first pipe to an external surface of the core part is between about 2.5 cm to about 5 cm.   
   
   
       13 . The method of  claim 9 , further comprising:
 distributing the first pipe in a predetermined surface, inside the core part, that follows an external surface of the core part and a distance between the predetermined surface and the external surface of the core part is between about 2.5 cm to about 5 cm.   
   
   
       14 . The method of  claim 9 , further comprising:
 uniformly distributing the first pipe in a predetermined surface inside the core part.   
   
   
       15 . The method of  claim 9 , further comprising:
 embedding a cooling pipe into the external part.   
   
   
       16 . The method of  claim 9 , further comprising:
 forming the external part out of grains of sand bonded with the resin, the external part being configured to encircle the core part, wherein the external part determines an external shape of the device.   
   
   
       17 . The method of  claim 9 , wherein an orientation of the first pipe in the core part is related to a solidification direction of the device. 
   
   
       18 . The method of  claim 9 , further comprising:
 embedding a second pipe inside the core part.   
   
   
       19 . A sand based mold for casting a casing of a compressor having a cavity, the sand based mold comprising:
 a core part including grains of sand bonded with a resin, wherein a shape of the core part fits a shape of the cavity of the casing to be formed;   a first pipe embedded into the core part and configured to allow a compressed fluid to flow through the first pipe, the first pipe having an inlet and an outlet that exit the mold;   an external part including the grains of sand bonded with the resin and configured around the core part such that molten material to be poured into the mold cannot escape; and   a second pipe embedded into the external part and configured to hold the fluid, wherein the first and second pipes are completely embedded into the core part and the external part, respectively.   
   
   
       20 . A method for forming a sand based mold, comprising:
 shaping an external surface of a box to match an external surface of the mold;   suspending a first pipe above the external surface of the box; and   pouring a mixture of sand and at least a binding resin into the box such that the first pipe is completely embedded into the mixture except an inlet and an outlet.