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473results about How to "Molding stability" patented technology

Wax mold combination of four-connection hollow turbine guide vane and precision casting method of wax mold combination

ActiveCN104308076ASmooth flowNot easy to undercastFoundry mouldsFoundry coresWaxHollow core
The invention provides a wax mold combination of a four-connection hollow turbine guide vane, which has high product quality and can completely solve the problems that a rotary connection R part of an edge plate and a vane body is hotly cracked and loosened, and a precision casting method of the wax mold combination. The wax mold combination comprises a sprue cup and a straight pouring gate which is communicated with an outlet end of the sprue cup, wherein inner sprue assemblies are arranged on the side wall of the straight pouring gate; each inner sprue assembly comprises a lower edge inner sprue communicated with one side of a vane lower edge plate cavity, and an upper edge inner sprue communicated with one side of a vane upper edge plate cavity; and each lower edge inner sprue and each upper edge inner sprue are sequentially arranged along the flow direction of the straight pouring gate. The precision casting method comprises the following steps: (1) manufacturing the wax mold combination; (2) carrying out shell making on the wax mold combination prepared in the step (1) to obtain a four-connection hollow turbine guide vane shell; and (3) covering one layer of ceramic heat-preservation cotton on a shell vane body part and covering two layers of ceramic cotton on the whole shell; and putting the treated shell into a roasting furnace for carrying out casting.
Owner:AECC AVIATION POWER CO LTD

Pouring method of hollow turbine guide vane

The invention provides a pouring method of a hollow turbine guide vane. The pouring method comprises the following steps: (1) manufacturing a wax mold combination; (2) carrying out shell making on the wax mold combination to obtain a hollow turbine guide vane shell; (3) covering one layer of ceramic heat-preservation cotton on a shell vane body part; covering two layers of ceramic cotton on the whole shell; and putting the treated shell into a roasting furnace and carrying out casting, wherein in a casting process, the temperature of casting the shell is 1065-1085 DEG C and the pouring temperature is 1460-1480 DEG C. According to the pouring method of the hollow turbine guide vane, a pouring system of the hollow turbine guide vane is not changed and the shell temperature and the pouring temperature are adjusted so that the casting temperature field is changed; the two layers of ceramic cotton on the whole body and one layer of the ceramic heat-preservation cotton on the vane body part are matched so that after the temperature of the whole shell is improved, the temperature field is uniform, the casting stress is eliminated and the casting temperature is reduced; and furthermore, the temperature field on a casting vane body and an edge plate keeps uniform, the shell is effectively insulated and the casting stress is eliminated.
Owner:AECC AVIATION POWER CO LTD

Secondary demoulding mechanism with gear and racks for injection mould

The invention discloses a secondary demoulding mechanism with a gear and racks for an injection mould, comprising an upper compound plate and a lower compound plate, wherein a cavity is installed below the upper compound plate; an ejection support plate is installed on the lower compound plate; a through hole is formed in the lower compound plate; the ejection rod of an injection moulding machine penetrates through the through hole and then contacts with the ejection support plate; an ejection needle pushing plate and an ejection needle fixing plate are installed on the ejection support plate; a stripping plate push rod and a return rod are fixed in the ejection needle fixing plate; a return spring is installed outside the return rod; a mould leg is installed on the lower compound plate; a support plate is installed on the mould leg; a core fixing plate, a core and a stripping plate are installed on the support plate; and a moulded plastic part is arranged among the core, the stripping plate and the cavity. The secondary demoulding mechanism with a gear and racks is characterized in that an acceleration rack is fixed between the lower compound plate and the support plate; installation holes are formed in the ejection needle pushing plate and the ejection needle fixing plate; an ejection needle rack and the gear are installed in the installation holes; the gear is fixed in the ejection needle pushing plate via a rotary shaft; the gear is matched with the acceleration rack and the ejection needle rack respectively; an ejection needle is installed on the ejection needle rack; and the ejection needle penetrates through the core and then contacts with the plastic part.
Owner:TAIZHOU KAIHUA AUTOMOBILE MOULD CO LTD

Automobile air-conditioner sucking cup punch forming die

The invention discloses an automobile air-conditioner sucking cup punch forming die. A hydraulic device is connected with an upper die seat, the upper die seat is provided with a male die fixing seat, a male die base plate is arranged between the male die fixing seat and the upper die seat, the male die base plate is simultaneously and fixedly connected with the male die fixing seat and the upper die seat, and a male die is arranged in the male die fixing seat. A female die is arranged between the male die and a lower die seat, two limiting columns are arranged at the end, close to the male die, of the lower die seat, and the male die fixing seat and the female die are both arranged between the two limiting columns. The end, close to the male die, of the female die is provided with two discharging plates, the end, close to the male die, of the female die is provided with a positioning pin, and the positioning pin is arranged between the two discharging plates. The end face where the positioning pin is arranged between the female die and the male die is arranged above the top end faces of the discharging plates, and the male die is concave inwards to form a groove. According to the automobile air-conditioner sucking cup punch forming die, a punch forming principle is used for enabling an air-conditioner sucking cup to be stably formed, discharging is quick, and the demand for the quality of the sucking cup of a customer can be met.
Owner:AIMBON (CHENGDU) ELECTRIC APPLICANCE CO LTD
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