Patent Publication Number: US-2017348878-A1

Title: Method for Cleaning a Full-Mold of Vehicle Tires

Description:
TECHNICAL FIELD 
     The invention is related to a method for cleaning the full-molds having profile such as segment used in the production of vehicle tires. 
     TECHNICAL BACKGROUND 
     There are numerous ventilation holes providing gas vacation from the molds and forming outer profiles of the vehicle tyres. These holes have moving valves inside thereof. ultrasonic cleaning methods are used when cleaning of such precision molds. For example, U.S. Patent No. US2011298157A1 discloses a cleaning method as the molds having profiles are taken in a pre-cleaning and a cleaning chamber one after the other, where a rinsing bath is implemented between these two chambers. After implementation of cleaning, valves are checked whether moving or not by ultrasound examining with provided relaxation that placed on air ventilation opening of the profile patterns in the first cleaning chambers. Then, Subsequently profile molds are need to be clean again. This method requires an expensive investment for the cleaning of the mold. 
     BRIEF DESCRIPTION OF THE INVENTION 
     The aim of the invention is to reduce the cost of cleaning process by ultrasonic method for full-mold of vehicle tire having profiles. 
     The invention to achieve said object is a cleaning method for production of vehicle tire full-molds having profile. 
     Preferred embodiments of the invention respectively the contaminated full-mold is taken a pre-treatment with at least one ultrasonic cleaning apparatus, so it provided budging of the contamination is occurred in the valves at the air ventilation openings of the full-molds having profile. The invention comprises the process steps where cleaned mold is re-cleaned in a first cleaning station by putting to dry ice process, and where cleaning of the full-mold with preferably multiple number of ultrasonic devices by immersing into a cleaning liquid in a second cleaning station, rinsing by taken in to a rinsing station, putting to another process by taken in to a passivation station, and drying by taken in to a drying station. 
     A preferred embodiment of the invention comprises the step of process as the depurated full-mold is suspended on a rack moved by a propulsion driver within a basket in a cabinet having cleaning liquid at the second cleaning station. 
     A preferred embodiment of the invention comprises a washing of process as step of process via spraying from at least one jet, preferably multiple jets onto the depurated full-mold at the rinsing station. 
     A preferred embodiment of the invention comprises the step of process as depurated full-mold is taken into a cabinet for a process at the first cleaning station. 
     A preferred embodiment of the invention comprises the step of process as cleaning of the depurated full-mold in an open environment (without taken into a cabinet) for a process at the first cleaning station. 
     A preferred embodiment of the invention has a microprocessor control unit which operates the steps of process at the said cleaning stations by adjusting the value amounts of the temperature, pressure, time, ultrasonic wave and movement. 
     A preferred embodiment of the invention has a PLC program which operates the steps of process at the said cleaning stations by adjusting the value amounts of the temperature, pressure, time, ultrasonic wave and movement. 
    
    
     
       DESCRIPTION OF THE FIGURES 
       The additional features and advantages of the invention are disclosed embodiments examples referenced in following drawings. 
         FIG. 1  shows processing steps of cleaning method for full-molds of vehicle tire as the subject of invention. 
     
    
    
     REFERENCE NUMBERS 
       
     
       
         
           
               
               
             
               
                   
               
             
            
               
                 1 Contaminated full-mold 
                 2 Depurated full-mold 
               
               
                 10 Ultrasonic cleaning a apparatus 
                 20 First cleaning station 
               
               
                 30 Cabinet 
                 40 Second cleaning station 
               
               
                 50 Cleaning liquid 
                 51, 52, 53 Ultrasonic device 
               
               
                 54 Basket 
                 60 Rinsing station 
               
               
                 61 Driving motor 
                 62 Circulation pump 
               
               
                 64 Pintle 
                 70 Pasivation istasyonu 
               
               
                 72 Jet 
                 80 Drying station 
               
               
                 82 Nozzle 
               
               
                   
               
            
           
         
       
     
     DETAILED DESCRIPTION OF THE INVENTION 
     The process steps of the application which is subject matter of the invention as an illustration of the cleaning method is shown in  FIG. 1  schematically. Accordingly, contaminated full-mold ( 1 ) is taken a pre-treatment with an ultrasonic cleaning apparatus ( 10 ), so movement of contamination by eliminating the dirt on full-molds that occurred in the valves at the air ventilation openings is achieved. From here, the full-mold ( 2 ) is taken into the first cleaning station ( 20 ) via dry ice blasting through a cabin ( 30 ). The period of the ultrasonic process is shortened on the second ultrasonic station ( 40 ) by providing elimination of coarse dirt and contamination via process of dry ice application. Thus, through increase in the contamination period, the usage efficiency of the cleaning liquid ( 50 ) of the bath having chemicals is increased. In the one embodiment of the invention, frequency of application increases in the same bath prepared at the second cleaning station ( 40 ). 
     Then the full-mold ( 2 ) is immersed into a basket ( 54 ) is situated in a a loaded tank with cleaning fluid ( 50 ) at the second cleaning station ( 40 ), and is cleaned by means of the ultrasonic device ( 51 ,  52 ,  53 ) are placed around the basket ( 54 ) which is actuated by a drive system. The dirth and contamination adhered on the surface are dissolved owing to the effect inside cleaning fluid ( 50 ) generated by the ultrasonic device ( 51 ,  52 ,  53 ) wherein the cleaning operation. Furthermore, the churning influence due to movable basket ( 54 ) during the cleaning of full-mold ( 2 ) provides removal of the contamination from the surface of the full-molds. 
     Besides, lower prices reduction is takes placed in the amount of cleaning liquid ( 50 ) containing waste water and waste chemicals discharged from the second cleaning station provides lower cost for the process. Likewise, providing this cost reduction also ecologically decreases the pollution of environment. 
     After the ultrasonic cleaning process at least one depurated full-mold ( 2 ) having profile preferably multiple depurated full-mold ( 2 ) having a profile is taken in to rinsing station ( 60 ) and is washed by spraying water from jet ( 64 ) by means of at least one motor ( 61 ). Meanwhile, usage of optimum amount of wash water is provided by means of water recirculation formed by a circulation pump ( 62 ). After this step, full-mold ( 2 ) is taken to a passivation station where spraying is employed from pintle nozzle( 72 ), and finally in the drying station ( 80 ) where spraying hot air is employed from nozzles ( 82 ). 
     A preferred application of the invention has a microprocessor control unit is used for operating with adjusting the value amounts of the temperature, pressure, time, ultrasonic wave and movement in the stations ( 20 ,  40 ,  60 ,  70 ,  80 ). A preferred application of the invention has a PLC (Programmable Logic Controller) is used for operating with adjusting the value amounts of the temperature, pressure, time, ultrasonic wave and movement in the stations ( 20 ,  40 ,  60 ,  70 ,  80 ).