阅读说明：本技术 一种浇冒口用加压装置 (Pressure device for casting head ) 是由 邵宏 于 2019-10-01 设计创作，主要内容包括：一种浇冒口用加压装置,其特征是,包括浇口用导轨移动机构、伸缩加压机构、冒口用加压机构、控制机构；包括在顶板下设置有导轨、位移气缸、气缸移动架、浇口加压气缸、加热压盖、加热用控温电源线与冒口加压气缸、冒口加压气管、冒口压盖、冒口加压气孔、接近开关、热电偶控制阀、PLC控制器等；当顶板下移使重力浇铸机上的金属上模与金属下模合模后,PLC控制器指令冒口密封气缸控制阀使冒口密封气缸把冒口压盖与冒口压合密封,铝合金液注入浇口后经模腔充入冒口后,加热压盖下压对浇口中的铝合金液进行加压的同时压缩空气经冒口气孔对冒口中的金属液面形成冒口加压气体进行加压,用较少的金属液就能够及时对模腔中的产品进行加压补缩。(A pressure device for a casting head is characterized by comprising a guide rail moving mechanism for a casting head, a telescopic pressure mechanism, a pressure mechanism for the casting head and a control mechanism; the device comprises a guide rail, a displacement cylinder, a cylinder moving frame, a pouring gate pressurizing cylinder, a heating gland, a temperature control power line for heating, a riser pressurizing cylinder, a riser pressurizing air pipe, a riser gland, a riser pressurizing air hole, a proximity switch, a thermocouple control valve, a PLC (programmable logic controller) and the like which are arranged below a top plate; when the top plate moves downwards to enable the upper metal die and the lower metal die on the gravity casting machine to be matched, the PLC instructs the riser sealing cylinder control valve to enable the riser sealing cylinder to press and seal a riser gland and a riser, aluminum alloy liquid is injected into a pouring gate and then is filled into the riser through a die cavity, the heating gland presses downwards to pressurize the aluminum alloy liquid in the pouring gate, meanwhile, compressed air pressurizes the riser pressurized gas formed by the metal liquid level in the riser through a riser air hole, and products in the die cavity can be pressurized and fed in time by using less molten metal.)

1. A pressure device for a casting head is characterized by comprising a guide rail moving mechanism for a casting head, a telescopic pressure mechanism, a pressure mechanism for the casting head and a control mechanism;

the guide rail moving mechanism for the pouring gate comprises a guide rail (3) arranged below a top plate (1), a displacement cylinder (2) is arranged on the outer side of the top end of the guide rail (3), a cylinder moving frame (4) is arranged at the top end of a cylinder rod of the displacement cylinder (2), and a telescopic pressurizing mechanism is arranged below the cylinder moving frame (4);

the telescopic pressurizing mechanism comprises a sprue pressurizing cylinder (5) arranged below a cylinder moving frame (4), a heating gland (7) arranged below a cylinder rod of the sprue pressurizing cylinder (5), a heating temperature-control power line inlet arranged on the cylinder rod on the heating gland (7), a heating temperature-control power line (6) arranged in the heating temperature-control power line inlet, a graphite sealing ring arranged in a cylinder rod sealing groove of the sprue pressurizing cylinder (5), and a pressurizing mechanism for a riser arranged below a top plate (1) beside the top end of the inner side of a guide rail (3);

the pressurizing mechanism for the riser comprises a riser pressurizing cylinder (12) arranged below a top plate (1), a riser pressurizing air pipe (15) is arranged on the lower side of a cylinder rod of the riser pressurizing cylinder (12), a riser gland (11) is arranged at the lower end of the cylinder rod of the riser pressurizing cylinder (12), a riser pressurizing air hole (13) is formed in the riser gland (11), a riser (14) is arranged on one side of a product mold cavity (9), and the riser pressurizing air hole (13) is communicated with the riser pressurizing air pipe (15) through inertia;

the control mechanism comprises a proximity switch (10) arranged at the top end of the inner side of the guide rail (3), a thermocouple arranged in the heating gland (7), and a temperature controller, a displacement cylinder control valve, a pouring gate cylinder control valve, a riser sealing cylinder control valve, a riser air compression electromagnetic valve, a contact pressure gauge and a PLC (programmable logic controller) arranged in a control system;

the displacement cylinder of the guide rail moving mechanism for the pouring gate is arranged on the outer side of the top end of the guide rail, the cylinder moving frame is arranged on the top end of a cylinder rod of the displacement cylinder, the top end of the cylinder rod is connected with one side of the cylinder moving frame, and the upper end of the cylinder moving frame slides in the guide rail; the telescopic pressurizing mechanism is arranged below the cylinder moving frame;

the gate pressurizing cylinder of the telescopic pressurizing mechanism is connected below the cylinder moving frame, the heating gland is connected below a cylinder rod of the gate pressurizing cylinder, the heating temperature control power line inlet is arranged on the cylinder rod above the heating gland, the cylinder rod with the heating temperature control power line inlet facing downwards is arranged in a hollow shape, the heating temperature control power line is arranged in the heating temperature control power line inlet, the graphite sealing ring is arranged in a cylinder rod sealing groove of the gate pressurizing cylinder, and the riser pressurizing mechanism is arranged below a top plate beside the top end of the inner side of the guide rail;

a riser pressurizing air pipe 15 of the riser pressurizing mechanism is arranged on the lower side of the air cylinder rod of the riser pressurizing air cylinder 12, the riser gland 11 is connected to the lower end of the air cylinder rod of the riser pressurizing air cylinder 12, the riser pressurizing air hole 13 is arranged in the riser gland 11, and the riser pressurizing air hole 13 is communicated with the riser pressurizing air pipe 15; the riser 14 is arranged on one side of the product mold cavity 9;

the control mechanism's nearly switch sets up on the inboard top of guide rail, the thermocouple sets up in the heating gland, temperature controller, displacement cylinder control valve, runner cylinder control valve, rising head sealed cylinder control valve, rising head pneumatic solenoid valve, contact manometer and PLC controller set up in control system's switch board, and the temperature controller is connected with the thermocouple, and displacement cylinder control valve is connected with the displacement cylinder, and runner cylinder control valve is connected with the runner cylinder, and rising head sealed cylinder control valve is connected with rising head sealed cylinder, and rising head pneumatic solenoid valve is connected with rising head pressurized gas pipe, and the contact manometer is connected with the PLC controller.

2. The pressure device for the dead head according to claim 1, wherein when the top plate moves down to match the upper metal mold and the lower metal mold on the gravity casting machine, the PLC instructs the dead head sealing cylinder control valve to make the dead head sealing cylinder press and seal the dead head gland and the dead head, the aluminum alloy liquid is injected into the dead head through the mold cavity after being injected into the gate, the pressure is displayed in the contact pressure gauge arranged at the other end of the riser cavity and the air pipe on the dead head cover by the inflation force, the contact point is closed when the pressure displayed in the contact pressure gauge is matched with the set pressure, the air cylinder moving frame is immediately pushed to the position right above the gate by the liquid injection displacement cylinder 2 after the liquid injection is finished, the metal liquid level of the gate and the dead head is lower than that of the open type dead head, the contact pressure gauge outputs a signal to the PLC, and the PLC sends an instruction to the gate cylinder control valve and, the feeder head pressurizing electromagnetic valve is opened while the heating gland is pressed downwards to pressurize the aluminum alloy liquid in the pouring gate, the pressurized air forms the feeder head pressurizing gas 22 to pressurize the metal liquid level in the feeder head through the feeder head air hole, and the product in the die cavity can be timely pressurized and fed by using the metal liquid in the pouring gate and the feeder head which is lower than that in the open feeder head, so that the utilization rate of the metal liquid is effectively improved, the process yield of the product is effectively improved, the feeding effect is improved, the density of the product is improved, and the production cost is lower.

Technical Field

The application relates to the field of casting, in particular to a pressurizing device for a casting head for gravity casting.

Background

Gravity casting is the most common casting mode in the casting field, at present, the static pressure of molten metal in a pouring gate and a riser is used for feeding a product, and the feeding effect of the gravity feeding method depends on the gravity (static pressure) generated by the height of the molten metal in the pouring gate and the riser, so that excessive molten metal must be injected, more pouring gate heads and riser heads remained after feeding can be generated in the pouring gate and the riser, the process yield is reduced, the material and energy are wasted, and the production cost is high.

Disclosure of Invention

The application provides a pressure device for dead head to above-mentioned problem, improves the product yield.

According to the technical scheme of the application: according to the technical scheme of the application: a pressure device for a casting head is characterized by comprising a guide rail moving mechanism for a casting head, a telescopic pressure mechanism, a pressure mechanism for the casting head and a control mechanism;

the guide rail moving mechanism for the sprue comprises a guide rail 3 arranged below a top plate 1, a displacement cylinder 2 is arranged on the outer side of the top end of the guide rail 3, a cylinder moving frame 4 is arranged at the top end of a cylinder rod of the displacement cylinder 2, and a telescopic pressurizing mechanism is arranged below the cylinder moving frame 4;

the telescopic pressurizing mechanism comprises a gate pressurizing cylinder 5 arranged below a cylinder moving frame 4, a heating gland 7 arranged below a cylinder rod of the gate pressurizing cylinder 5, a heating temperature control power line inlet arranged on the cylinder rod of the heating gland 7, a heating temperature control power line 6 arranged in the heating temperature control power line inlet, a graphite sealing ring arranged in a cylinder rod sealing groove of the gate pressurizing cylinder 5, and a pressurizing mechanism for a riser arranged below a top plate 1 beside the top end of the inner side of a guide rail 3;

the pressurizing mechanism for the riser comprises a riser pressurizing cylinder 12 arranged below a top plate 1, a riser pressurizing air pipe 15 is arranged on the lower side of a cylinder rod of the riser pressurizing cylinder 12, a riser gland 11 is arranged at the lower end of the cylinder rod of the riser pressurizing cylinder 12, a riser pressurizing air hole 13 is formed in the riser gland 11, a riser 14 is arranged on one side of a product mold cavity 9, and the riser pressurizing air hole 13 is communicated with the riser pressurizing air pipe 15;

the control mechanism comprises a proximity switch 10 arranged at the top end of the inner side of the guide rail 3, a thermocouple arranged in the heating gland 7, a temperature controller, a displacement cylinder control valve, a pouring gate cylinder control valve, a riser sealing cylinder control valve, a riser air compression electromagnetic valve, a contact pressure gauge, a PLC controller and the like arranged in a control system; the technical effects of this application lie in: when a top plate 1 moves downwards to enable a metal upper die 16 and a metal lower die 21 on a gravity casting machine to be matched, a PLC controller instructs a riser sealing cylinder control valve to enable a riser sealing cylinder 12 to press and seal a riser gland 11 and a riser 15, aluminum alloy liquid 17 is injected into a pouring gate and then is filled into the riser through a die cavity, the PLC controller instructs the riser sealing cylinder control valve to enable a riser cavity and a contact pressure gauge arranged at the other end of an air pipe on the riser cap to display pressure, the pressure displayed in the contact pressure gauge is matched with the set pressure and the contact is closed, a liquid injection completion displacement cylinder 2 immediately pushes a cylinder moving frame 4 to be right above a pouring gate 8, the metal liquid level of the pouring gate and the riser is lower than the metal liquid level in the pouring gate (see the description of the drawing), the contact pressure gauge outputs a signal to the PLC controller, the PLC controller sends an instruction to a pouring gate cylinder control valve and a riser air-pressing electromagnetic valve after time delay, the heating gland is, the compressed air forms riser pressurized gas 22 for pressurizing on the metal liquid level in the riser through the riser air hole, and the product in the die cavity can be pressurized and fed in time by using the metal liquid in the sprue and the riser which is lower than the open riser, so that the utilization rate of the metal liquid is effectively improved, the process yield of the product is effectively improved, the feeding effect is improved, the density of the product is improved, and the production cost is lower.

Drawings

Fig. 1 is a schematic view showing a state structure of a feeder head pressurizing device according to the present invention provided on a top plate of a casting machine.

Fig. 2 is a schematic structural diagram of a state in which a riser is pressurized and sealed after an upper die and a lower die are closed in the present application.

Fig. 3 is a schematic view showing a state in which only a small amount of molten metal is injected into a gate.

FIG. 4 is a schematic structural view of a state in which a gate heating cover presses gas in the gate and the cover to perform product pressurization feeding on a small amount of molten metal in a casting head;

FIG. 5 is a schematic view showing the structure of a feeder without a pressurizing device for a feeder according to the present invention, in a state where the product is pressurized and fed by gravity (static pressure) generated by the height when a large amount of molten metal must be poured into the feeder; the gate head 18 and the riser head 20 in the figure are gate heads and riser heads remaining after feeding in this state.

Detailed Description

The following description of the embodiments of the present application will be made with reference to the accompanying drawings.

The device comprises an upper top plate 1, a displacement cylinder 2, a guide rail 3, a cylinder moving frame 4, a pouring gate pressurizing cylinder 5, a heating temperature-control power line 6, a heating gland 7, a pouring gate 8, a product die cavity 9, a proximity switch 10, a dead head gland 11, a dead head sealing cylinder 12, a dead head pressurizing air hole 13, a dead head 14, a dead head pressurizing air pipe 15, a metal upper die 16, aluminum alloy liquid 17, a pouring gate head 18, the height 19 of aluminum alloy liquid filled in the dead head, a dead head 20, a metal lower die 21, dead head pressurizing air 22 and the like;

as shown, the present application is a pressure device for a casting head;

according to the technical scheme of the application: a pressure device for a casting head comprises a guide rail moving mechanism for a casting head, a telescopic pressure mechanism, a pressure mechanism for the casting head and a control mechanism;

the guide rail moving mechanism for the pouring gate comprises a guide rail 3, a displacement cylinder 2 and a cylinder moving frame 4, wherein the guide rail 3, the displacement cylinder 2 and the cylinder moving frame are arranged below a top plate 1; the displacement cylinder 2 is arranged on the outer side of the top end of the guide rail 3, the cylinder moving frame 4 is arranged on the top end of a cylinder rod of the displacement cylinder 2, the top end of the cylinder rod is connected with one side of the cylinder moving frame 4, and the upper end of the cylinder moving frame 4 slides in the guide rail 3; the telescopic pressurizing mechanism is arranged below the cylinder moving frame 4;

the telescopic pressurizing mechanism comprises a pouring gate pressurizing cylinder 5, a heating gland 7, a heating temperature-control power line inlet, a heating temperature-control power line 6 and a graphite sealing ring; the sprue pressurizing cylinder 5 is connected below the cylinder moving frame 4, the heating gland 7 is connected below a cylinder rod of the sprue pressurizing cylinder 5, the heating temperature control power line inlet is arranged on the cylinder rod above the heating gland 7, the cylinder rod with the heating temperature control power line inlet facing downwards is arranged in a hollow shape, the heating temperature control power line 6 is arranged in the heating temperature control power line inlet, the graphite sealing ring is arranged in a cylinder rod sealing groove of the sprue pressurizing cylinder 5, and the riser pressurizing mechanism is arranged below a top plate 1 beside the top end of the inner side of the guide rail 3;

the riser pressurizing mechanism comprises a riser pressurizing cylinder 12, a riser pressurizing air pipe 15, a riser gland 11, a riser pressurizing air hole 13 and a riser 14; the riser pressurizing air pipe 15 is arranged on the lower side of the cylinder rod of the riser pressurizing cylinder 12, the riser gland 11 is connected to the lower end of the cylinder rod of the riser pressurizing cylinder 12, the riser pressurizing air hole 13 is arranged in the riser gland 11, and the riser pressurizing air hole 13 is communicated with the riser pressurizing air pipe 15; the riser 14 is arranged on one side of the product mold cavity 9;

the control mechanism comprises a proximity switch 10, a thermocouple, a temperature controller, a displacement cylinder control valve, a pouring gate cylinder control valve, a riser sealing cylinder control valve, a riser air compression electromagnetic valve, a contact pressure gauge and a PLC (programmable logic controller); the proximity switch 10 is arranged on the top end of the inner side of the guide rail 3, the thermocouple is arranged in the heating gland 7, the temperature controller, the displacement cylinder control valve, the pouring gate cylinder control valve, the pouring head sealing cylinder control valve, the pouring head air compression electromagnetic valve, the contact pressure gauge and the PLC are arranged in a control cabinet of the control system, the temperature controller is connected with the thermocouple, the displacement cylinder control valve is connected with the displacement cylinder, the pouring gate cylinder control valve is connected with the pouring gate cylinder, the pouring head sealing cylinder control valve is connected with the pouring head sealing cylinder, the pouring head air compression electromagnetic valve is connected with the pouring head compression air pipe 15, and the contact pressure gauge is connected with the PLC;

in the application, when a top plate 1 moves downwards to enable a metal upper die 16 and a metal lower die 21 on a gravity casting machine to be matched, a PLC controller instructs a riser sealing cylinder control valve to enable a riser sealing cylinder 12 to press and seal a riser gland 11 and a riser 15, aluminum alloy liquid 17 is injected into a pouring gate and then is filled into the riser through a die cavity, the filling force enables a contact pressure gauge arranged at the other end of an air pipe on the riser cavity and the riser cap to display pressure, the pressure displayed in the contact pressure gauge is matched with the set pressure, the contact is closed, a displacement cylinder 2 after liquid injection is completed pushes a cylinder moving frame 4 to be right above a pouring gate 8, the metal liquid level of the pouring gate and the riser is lower than that of an open type pouring head (see the description of the attached figures), the contact pressure gauge outputs signals to the PLC controller, the PLC controller sends instructions to a pouring gate cylinder control valve and a riser pressure electromagnetic valve in a delayed manner, the heating gland presses the aluminum alloy liquid in the pouring gate and simultaneously, the compressed air forms riser pressurized gas 22 for pressurizing on the metal liquid level in the riser through the riser air hole, and the product in the die cavity can be pressurized and fed in time by using the metal liquid in the sprue and the riser which is lower than the open riser, so that the utilization rate of the metal liquid is effectively improved, the process yield of the product is effectively improved, the feeding effect is improved, the density of the product is improved, and the production cost is lower.