US2007131378A1PendingUtilityA1

Burn-off resin model and precision casting method adopted in conjunction with burn-off resin model

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Assignee: SHONAN DESIGN CO LTDPriority: Oct 8, 2003Filed: Oct 8, 2003Published: Jun 14, 2007
Est. expiryOct 8, 2023(expired)· nominal 20-yr term from priority
Inventors:Yasuhiko MatsuokaHidekazu SuzukiNobuyuki TanakaTomonobu KasugaKeiichiro OnsoReiji MatsuyamaHisashi MizunoAkira TakaseTakaharu OiMinoru MatsumuraTaro KitaKazuki KamataMasato Kikuchihara
B22C 9/04B22C 7/02
35
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Claims

Abstract

In order to satisfy the requirements for satisfactory levels of melting•burn-off characteristics in response to heat application, high temperature burn-off characteristics and ease of residual ash removal that a resin model should assure as an alternative to a wax model, the burn-off resin model according to the present invention, which can be used in the lost wax process, is manufactured by forming a liquid resin compound containing 1 to 30 wt. % of a plasticizer (D) and 1 to 20 wt. % of a wax component (E) blended into a double fluid reactive setting liquid urethane resin (C) constituted of a multifunctional polyol component (A) and a multifunctional polyisocyanate component (B) and then by setting the liquid resin compound within a working life of 5 minutes or less.

Claims

exact text as granted — not AI-modified
1 - 9 . (canceled)  
   
   
       10 . A burn-off resin model used in a lost wax process wherein: 
 a liquid resin compound is formed with 1 to 30 wt. % of plasticizer (D) and 1 to 20 wt. % of a wax component (E) blended a said double fluid reactive setting liquid urethane resin (C) constituted of a multifunctional polyol component (A) and a multifunctional polyisocyanate component (B); and    said liquid resin compound is set within a working life of 5 minutes or less to form said resin model.    
   
   
       11 . A burn-off resin model according to  claim 10  wherein: 
 said multifunctional polyol component (A) in said double fluid reactive setting liquid urethane resin has an average functional radix of 2.8 or larger and said multifunctional polyisocyanate component (B) in said double fluid reactive setting liquid urethane resin has an average functional radix of 2.0 or larger with an NCO/OH ratio achieving a value within a range of 0.7 to 1.0.    
   
   
       12 . A burn-off resin model according to  claim 10  wherein: 
 said plasticizer (D) is micro-dispersed through phase separation when said double fluid reactive setting liquid urethane resin (C) undergoes the process of reactive setting.    
   
   
       13 . A burn-off resin model according to  claim 11  wherein: 
 said plasticizer (D) is micro-dispersed through phase separation when said double fluid reactive setting liquid urethane resin (C) undergoes the process of reactive setting.    
   
   
       14 . A burn-off resin model according to claims  10  wherein: 
 said double fluid reactive setting liquid urethane resin (C) contains 2 to 25 wt. % of polyether chains with a chemical structure indicated in the chemical structural formula below.                          
   
   
       15 . A burn-off resin model according to  claim 11  wherein: 
 said double fluid reactive setting liquid urethane resin (C) contains 2 to 25 wt. % of polyether chains with a chemical structure indicated in the chemical structural formula below.                          
   
   
       16 . A burn-off resin model according to  claim 12  wherein: 
 said double fluid reactive setting liquid urethane resin (C) contains 2 to 25 wt. % of polyether chains with a chemical structure indicated in the chemical structural formula below.                          
   
   
       17 . A burn-off resin model according to  claim 13  wherein: 
 said double fluid reactive setting liquid urethane resin (C) contains 2 to 25 wt. % of polyether chains with a chemical structure indicated in the chemical structural formula below.                          
   
   
       18 . A burn-off resin model according to  claim 17  wherein: 
 said wax component (E) is provided in the form of grains, flakes or lumps, each formed in a size that allows it to be contained in an approximate volume of 1 cm 3 .    
   
   
       19 . A burn-off resin model according to  claim 10  wherein: 
 said double fluid reactive setting liquid urethane resin (C) is blended with water by adding 0.01 to 1.0 wt. % of water (F) into said double fluid reactive setting liquid urethane resin (C) to induce aqueous foaming.    
   
   
       20 . A burn-off resin model according to  claim 11  wherein: 
 said double fluid reactive setting liquid urethane resin (C) is blended with water by adding 0.01 to 1.0 wt. % of water (F) into said double fluid reactive setting liquid urethane resin (C) to induce aqueous foaming.    
   
   
       21 . A burn-off resin model according to  claim 13  wherein: 
 said double fluid reactive setting liquid urethane resin (C) is blended with water by adding 0.01 to 1.0 wt. % of water (F) into said double fluid reactive setting liquid urethane resin (C) to induce aqueous foaming.    
   
   
       22 . A burn-off resin model according to  claim 17  wherein: 
 said double fluid reactive setting liquid urethane resin (C) is blended with water by adding 0.01 to 1.0 wt. % of water (F) into said double fluid reactive setting liquid urethane resin (C) to induce aqueous foaming.    
   
   
       23 . A burn-off resin model according to  claim 18  wherein: 
 said double fluid reactive setting liquid urethane resin (C) is blended with water by adding 0.01 to 1.0 wt. % of water (F) into said double fluid reactive setting liquid urethane resin (C) to induce aqueous foaming.    
   
   
       24 . A burn-off resin model according to  claim 10  wherein: 
 that an organic solvent (G) is blended into said double fluid reactive setting liquid urethane resin (C) so as to achieve an organic solvent content of 10 to 25 wt. %.    
   
   
       25 . A burn-off resin model according to  claim 11  wherein: 
 an organic solvent (G) is blended into said double fluid reactive setting liquid urethane resin (C) so as to achieve an organic solvent content of 10 to 25 wt. %.    
   
   
       26 . A burn-off resin model according to  claim 13  wherein: 
 an organic solvent (G) is blended into said double fluid reactive setting liquid urethane resin (C) so as to achieve an organic solvent content of 10 to 25 wt. %.    
   
   
       27 . A burn-off resin model according to  claim 17  wherein: 
 an organic solvent (G) is blended into said double fluid reactive setting liquid urethane resin (C) so as to achieve an organic solvent content of 10 to 25 wt. %.    
   
   
       28 . A burn-off resin model according to  claim 18  wherein: 
 an organic solvent (G) is blended into said double fluid reactive setting liquid urethane resin (C) so as to achieve an organic solvent content of 10 to 25 wt. %.    
   
   
       29 . A burn-off resin model according to  claim 10  wherein: 
 fine particles (H) of a natural high molecular waste are added into said double fluid reactive setting liquid urethane resin (C) so as to achieve a waste particle content of 1 to 10%.    
   
   
       30 . A burn-off resin model according to  claim 11  wherein: 
 fine particles (H) of a natural high molecular waste are added into said double fluid reactive setting liquid urethane resin (C) so as to achieve a waste particle content of 1 to 10%.    
   
   
       31 . A burn-off resin model according to  claim 13  wherein: 
 fine particles (H) of a natural high molecular waste are added into said double fluid reactive setting liquid urethane resin (C) so as to achieve a waste particle content of 1 to 10%.    
   
   
       32 . A burn-off resin model according to  claim 17  wherein: 
 fine particles (H) of a natural high molecular waste are added into said double fluid reactive setting liquid urethane resin (C) so as to achieve a waste particle content of 1 to 10%.    
   
   
       33 . A burn-off resin model according to  claim 18  wherein: 
 fine particles (H) of a natural high molecular waste are added into said double fluid reactive setting liquid urethane resin (C) so as to achieve a waste particle content of 1 to 10%.    
   
   
       34 . A burn-off resin model according to  claim 23  wherein: 
 fine particles (H) of a natural high molecular waste are added into said double fluid reactive setting liquid urethane resin (C) so as to achieve a waste particle content of 1 to 10%.    
   
   
       35 . A burn-off resin model according to  claim 28  wherein: 
 fine particles (H) of a natural high molecular waste are added into said double fluid reactive setting liquid urethane resin (C) so as to achieve a waste particle content of 1 to 10%.    
   
   
       36 . A high precision casting method achieved by using a burn-off resin model according to  claim 10 .  
   
   
       37 . A high precision casting method achieved by using a burn-off resin model according to  claim 17 .  
   
   
       38 . A high precision casting method achieved by using a burn-off resin model according to  claim 34 .  
   
   
       39 . A high precision casting method achieved by using a burn-off resin model according to  claim 35.

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