diff --git a/app/models/metadata_factory.rb b/app/models/metadata_factory.rb
index d7a2e039..8cac1c86 100644
--- a/app/models/metadata_factory.rb
+++ b/app/models/metadata_factory.rb
@@ -3,6 +3,8 @@
 # Devuelve metadatos de cierto tipo
 class MetadataFactory
   def self.build(**args)
-    "Metadata#{args[:type].camelcase}".constantize.new(args)
+    @@factory_cache ||= {}
+    @@factory_cache[args[:type]] ||= ('Metadata' + args[:type].to_s.camelcase).constantize
+    @@factory_cache[args[:type]].new(args)
   end
 end