HOW TO PRODUCE HIGH QUALITY GLASS CONTAINER
HOW TO PRODUCE HIGH QUALITY GLASS CONTAINER
WE SHOULD HAVE SKILLED PEOPLE, LONG TERM EXPERIENCE AND HIGH TECHNOLOGY TO REACH OUR AIM OF QUALITY BOTTELES.
MANY BIG COMPANIES INTRODUCE KNOW- HOW FOR TRAINEES.
LIGHT WEIGHT GLASS CONTAINERS IS A CHALENGUE TO COMPETE WITH PET. ALSO TO REDUCE CO2 ON THE ENVIROMENT.
1- QUALITY GLASS FROM FURNACE OPERATION IS NECESSARY: HOMOGINITY AND MIN. BUBBLES.
SILICA, LIME STONE, SODA ASH AND CULLET ARE THE MAIN RAW MATERIALS. THE MELTING OCCURS AT 1500-1600 C AND CHEMICAL RECTIONS CREATS HUGE QUANTITY OF BUBBLES.GLASS TEMP. AND GLASS FLOW SHOULD BE CONTROLLED TO GENERATE QUALITY GLASS ALONG FURNACE, WORKING END AND FOREHEARTH.
2- GLASS DESIGN TECHNOLOGY :BOTTLE SHAPE,PARISON AND BOTTLE STRENGTH ANALYSIS:
LIGHT WEIGHT MEANS DIFFICULTY IN FORMING AND DECREASING STRENGTHS.WE HAVE TO USE SIMULATION TO PREDICT THE PERFORMANCE AND SUITABLE STRENGTHS. THIS AREA IS BOTTLE SHAPE.
PARISON DESIGN: SHOULD DEPENDS ON TEMPRETURE DURING FORMING AND HEAT TRANSFER.
THE FOLLOWING IS A TABLE DETERMINE : PLACE,TEMP AND VISCOSITY.
3
1193
gob
3.5-7.5
1100-700
In blank
7.5-4.5
700-1000
reheating
7.4
737
n.ring open average
6.25
807
n.ring open average bottom
5.88
835
n.ring open hottest
Reheating continue up to the final blow on.
5.16
893
After final blow 1 sec
5.84
873
2 sec average
6.44
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796
2 sec coldest
6.5
800:750
Final blow of
ok
7.7
721
delivery
ok
7.9
710
Deformed Bottle
6.5
790
Deformed bottle
7
750
Cold Bottle
9
600
GLASS DISTRIBUTION: IS A RESULT OF PARISON LAYOUT WHICH IS RELATED TO
TEMPRETURE.
BOTTLE STRENGTH ANALYSIS:
LIGHT WEIGHT MAKES THICKNESS THIN AND GLASS STRENGTH IS REDUCED. . . STRENGTH ANALYSIS IS USEFUL TO PREVENT ANY PROBLEM DURING FILLING PROCESS ANFD TRANSPORTATION. .
AS WE HAVE QUALITY GLASS AND GOOD DESIGN OF SHAPE, PARISON, STRESS ANALYSIS AND GOOD MAINTENANCE OF MOLD SET, WE HAVE AT LEAST 80% FROM THE EFFICIENCY.
3- FORMING STARTS FROM GOB TEMP, AND GOB SHAPE . DTERMINATION OF OPTIMUM MACHINE SPEED. DATA SHEET. DESIPLINE IS NECESSARY TO OVERCOME DIFFICULTIES. FOR LIGHTER WEIGHT , WE NEED SURFACE TREATMENT TO COAT THE BOTTLE. ALSO DEFECT CAUSE ANALYSIS IS ESSINTIAL.
GOB TEMP. AND MACHINE SPEED ARE RELATED TO GLASS COMPOSITION, AND THE PROCESS "B.B,PB".
DATA SHEET AND TIMING IS A DIALOUGE BETWEEN THE FORMING PEOPLE, MACHINE AND BOTTLE. GOOD FORMING SPECIALISTS SHOULD HAVE AN IMAGINATION ABILITY.
SURFACE TREATMENT IS ANOTHER FIELD. HEYA USED PLASTIC MATERIAL. WIGAND GLASS ALSO .TOYO USED MULTI COATING.
BOTTLE WITH WEIGHT 280 GM HAS BETTER STRENGTH THAN A BOTTLE OF WEIGHT 460 GM.
ALSO TOYO USE SILICA AS A TREATMENT TO MIMIMIZE THE IMPACT BREAKAGE OF BOTTLES. SILICA IS LIKE A CUSHONING.
DEFECT CAUSE: INTERFERENCE BETWEEN GLASS AND MOLDS IS VERY SENSETIVE AND CRITICAL. UNSTABLE HEAT TRANSFER MAKES A LOT OF DEFECTS LIKE CHECKS, BAD DISTRIBUTION, OVALITY AND SUNKEN BODY.
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1ySorry I think that out of the high technical-technological maschineries level, you need a very high level skilled and engaged people to understand the importance of glass quality. And linked to this everybody from the company has to understand that all of them are working for the customers, because the customers ensure the existancy of families. So everybody has to fulfill all customer's requirement.