帮忙翻译热加工英语的课文

帮忙翻译热加工英语的课文
at one time all molding wan done by hand but today's labour costs and competition make machine molding in industry
molding machines offer higher production rates and better quality casting in addition to less heavy labor and lower costs
molding machines serve in two general capacities 1to pack sand firmly and uniformly into the mold and to manipulate the flasks ,mold and pattern
properly cintrolled and applied machine ramming is more uniform and dependable and produces more and better molds than hand ramming
manipulation is done in various degrees on different machines and may include turning over parts or all of the mold and lifting of patterns and flasks
molding machines are available in a number of makes models and sizes and perform the forgoing functions in various combinations and ways
generally they fall into one of three classes and will be illustrated by a typical form of each class
these are the jolt-squeeze jolt-rollover and sand slinger molding machines
jolt-squeeze molding machines a jolt-squeezer consists basically of a table actuated by two pistons in air cylinders one inside the other
the mold on the table in jolted by the action of the inner piston that raises the table repeatedly and drops it down sharply on a bumper pad
jolting packs the sand in the lower parts of the flask but not at the top
the larger cylinder pushes the table upward to squeeze the sand in the mold against the squeeze head at the top
squeeze compresses the top layers of sand in the mold but sometimes does not penetrate effectively to all areas of a pattern
in the case shown the cope is squeezed so as not to damage the finished drag by jolting
some machines do simply jolting others squeezeing alone
for high production one jolt-squeezeer may be set up for the drag portion of a mold and another for the cope
a vibrator may be attached to a machine to loosen the pattern to remove it easily without damaging the mold
jolt-rollover pattern-draw machines a flask is set over a pattern on a table and is filled with sand and jolted
excess sand is struck off and a bottom board is clamped to the flask
the machine raies the mold and rolls it over onto a table or conveyor
the flask is freed from the machine
the pattern is vibrated raised from the mold and returned to loading position
similar machines squeeze as well as jolt

过去浇筑行业都是人工操作的,但是现在劳动成本的上升和竞争的激烈使得该行业在机械化方面得到了发展,机械化浇筑不仅减轻了劳动强度,降低了成本,而且,生产效率和铸件质量都大大提高,浇筑机械有两方面功能,1,能把沙箱内的沙子均匀挤压坚实,2,控制注入口,铸模和铸件模型的摆位,由于浇注机是连铸的,且可靠,不仅比人工浇筑生产效率高,质量也更加可靠,不同的浇注机的操作翻转形式也不一样,包括模具的部分翻转,整体翻转,模型和注入口的提升,有多种类型和型号的浇注机可供选择,有压铸和浇筑双功能的,通常分为3个级别,分别用图示加以说明,these are the jolt-squeeze jolt-rollover and sand slinger molding machines
jolt-squeeze molding machines a jolt-squeezer consists basically of a table actuated by two pistons in air cylinders one inside the other
the mold on the table in jolted by the action of the inner piston that raises the table repeatedly and