CN1176859A

CN1176859A - Method and equipment for high pressure casting of light alloy hub

Info

Publication number: CN1176859A
Application number: CN 96106869
Authority: CN
Inventors: 林煜昆
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-06-28
Filing date: 1996-06-28
Publication date: 1998-03-25

Abstract

The invented method is that the smelted alloy in the ram pressed material tube is radially filled through the radial runner into the cast part moulding cavity by laminar type flow. The equipment is composed of moulding press and mould, the mould is composed of fixed mould, movable mould and side sliding mould, the casting article mould cavity is constituted by the movable mould, fixed mould and side sliding mould. Under the fixed mould there are a radial runner, one end of which links up the periphery of the mould cavity of the casting, and a shunt structure, the two ends of which link up the material tube and the other end of the runner separately.

Description

The high pressure casting of light alloy hub method and apparatus

The invention belongs to casting method and equipment, particularly a kind of high pressure casting of light alloy hub method and apparatus.

The method that the light-alloy wheel rim cast form of commonly using is adopted, or be gravitation casting method, or be low pressure casting method, or be the high pressure casting of the utilization tradition die casting machine of Italy's employing.

The volume contraction that the gravitational casting genealogy of law is produced when replenishing alloy graining with the gravity of rising head place alloy liquation itself.

The low pressure casting rule is with similar vapour-pressure type thermos bottle principle compensate for volume shrinkage.

These two kinds of casting methods are when casting, and the mode that can only use compressed air or water smoke to cool off is quickened the time of casting solidification, not only causes the casting forming cycle long, is not suitable for a large amount of productions, and causes the foundry goods crystalline particle thick, bad mechanical strength; Particularly poor because of casting accuracy, must reserve more processing capacity and big rising head must be set, cause processing cost to increase.

The high pressure casting of the single hop gate velocity filling of the utilization tradition die casting machine that Italy adopts is the high pressure casting from the central cast gate filling of three plates mold.

As Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12, Figure 13, shown in Figure 14, be the process of using the single hop gate velocity to carry out wheel rim die casting operation from the high pressure casting of central cast gate filling.This high pressure casting, for being convenient to, makes and suitable alloy liquation flow direction design by mould, it is main adopting the cast gate filling of three plates mold central authorities, but its mould is made up of fixed die, intermediate die dynamic model and sideslip mould, and place between the template of single speed die casting machine, but but fixed die and dynamic model are installed in respectively on the fixed form and moving platen of single speed die casting machine; The end face that fixed die and intermediate die are adjacent is provided with an end and is positioned at the radially running channel that center, the other end and material pipe connect; But intermediate die constitutes foundry goods end face die cavity with the dynamic model adjacent face, and the intermediate die center is provided with large and small end and reaches the radially taper running channel of running channel perforation with foundry goods end face die cavity respectively; But the sideslip mould places between intermediate die and the dynamic model, constitutes the circumference foundry goods die cavity that connects with foundry goods end face die cavity in it between the Zhou Yuke dynamic model, and makes foundry goods end face die cavity and foundry goods circumference die cavity constitute and the corresponding foundry goods die cavity of foundry goods shape.

This casting method and Casting Equipment not only because of intermediate die is set, make the mould complexity, increase equipment cost, and in the production use, its radially the stub bar of running channel can drop in the die casting machine, must regularly shut down cleaning, be not suitable for automated production; Foundry goods and running channel junction must be blocked during particularly because of the demoulding, so the running channel cross section can not be designed too big, yet for reaching stable flow rate, then must improve the flow velocity of cast gate place alloy liquation, the alloy liquation is at the cast gate place sprays into shape filling die cavity, make it to discharge and be involved in the alloy liquation, cause producing in the foundry goods pore because of air in the die cavity.For this reason, vacuum-pumping equipment in the palpus equipment mould to guarantee the quality of foundry goods, increases equipment cost.

The purpose of this invention is to provide that a kind of production cost is low, equipment is simple, product quality is high, and can be applicable to the high pressure casting of light alloy hub method and apparatus of automated production.

Method of the present invention is by alloy liquation in the plunger compression material pipe, make in the material pipe alloy liquation through running channel radially with layer flow mode filling foundry goods die cavity radially.

Equipment of the present invention is made of die casting machine and mould, but is interval with fixed form moving platen and the flow dividing structure that is parallel to each other on the die casting machine, and fixed form is provided with the material pipe of ccontaining plunger, and an end of order material pipe and flow dividing structure connects.

But but mould is made of the fixed die dynamic model and the sideslip mould that are installed in respectively on the fixed form moving platen, but fixed die constitutes foundry goods end face die cavity with the dynamic model adjacent face, but below the end face adjacent of fixed die, be provided with the radially running channel that an end and foundry goods end face die cavity periphery connects, the radially other end of the other end of running channel and flow dividing structure perforation with dynamic model; But the sideslip mould places between fixed die and the dynamic model, constitutes the circumference foundry goods die cavity that connects with foundry goods end face die cavity in it between the Zhou Yuke dynamic model, and makes foundry goods end face die cavity and foundry goods circumference die cavity constitute and the corresponding foundry goods die cavity of foundry goods shape.

Because method of the present invention be by the interior alloy liquation of plunger compression material pipe, make its through running channel radially with layer flow mode filling foundry goods die cavity radially.Equipment of the present invention is made of die casting machine and mould, but but mould is made of the fixed die dynamic model and the sideslip mould that are installed in respectively on the fixed form moving platen, but constitute the foundry goods die cavity between dynamic model and fixed die and the sideslip mould, below the fixed die end face, be provided with the radially running channel that an end and foundry goods die cavity periphery connects, and be provided with two ends respectively with material pipe and the flow dividing structure that connects of the running channel other end radially.During die casting, not only can not produce vortex phenomenon, stop air holes in the wheel rim foundry goods, vacuum-pumping equipment in intermediate die and the mould need not be set, make that equipment is simple, cost is low, product quality is high, and reduce and avoid radially that the stub bar at running channel place falls into die casting machine, can be applicable to automated production, thereby reach purpose of the present invention.

Fig. 1, be device structure constructed profile of the present invention.

Fig. 2, be the local enlarged diagram of A portion among Fig. 1.

Fig. 3, be the local enlarged diagram of B portion among Fig. 2.

Fig. 4, be the local enlarged diagram of C portion among Fig. 2.

Fig. 5, be D-D profile among Fig. 1.

Fig. 6, high pressure casting of light alloy hub device structure constructed profile for commonly using.

Fig. 7, high pressure casting of light alloy hub device structure constructed profile (intermediate die and fixed die separated position) for commonly using.

Fig. 8, be among Fig. 7 E to view.

Fig. 9, high pressure casting of light alloy hub device structure constructed profile (but dynamic model and intermediate die separated position) for commonly using.

Figure 10, be among Fig. 9 F to view.

Figure 11, high pressure casting of light alloy hub device structure constructed profile (sideslip mould exit status) for commonly using.

Figure 12, be among Figure 11 G to view.

Figure 13, high pressure casting of light alloy hub device structure constructed profile (for taking out wheel rim foundry goods state) for commonly using.

Figure 14, be among Figure 13 H to view.

Below in conjunction with accompanying drawing the present invention is further elaborated.

Method of the present invention is by alloy liquations 3 in the plunger 111 compression material pipe 112, make alloy liquation 3 in the material pipe 112 through running channel 211 radially with regulatable multistage speed and layer flow mode filling foundry goods die cavity 25 radially; And work as 3 26 a period of times of filling foundry goods die cavity of alloy liquation, in about 20 seconds, with 23 pairs of wheel rim foundry goods of ftercompction structure pressurized.

As shown in Figure 1, equipment of the present invention is made of die casting machine 1 and mould 2, but be interval with fixed form 11 moving platens 12 and the flow dividing structure 13 that are parallel to each other on the die casting machine 1, fixed form 11 is provided with the material pipe 112 of ccontaining plunger 111, and an end of order material pipe 112 and flow dividing structure 13 connects; But flow dividing structure 13 is by the passage 131 that connects with fixed form 11 feeding tubes 112 and grip device 132 with the resistance of moving platen 12 interlocks and constitute, passage 131 internal perisporiums are provided with a plurality of stratum 1311 that progressively enlarge vertically, and the minimum diameter of its stratum 1311 is slightly larger than the diameter of material pipe 112; The end that device 132 is gripped in resistance is provided with the protuberance 1321 that places in the passage 131, and make this protuberance 1321 for be corresponding with passage 131 and with the variable cross-section body in the little gap 133 of its formation, protuberance 1321 is provided with and expects to manage 112 axial notches 1322 that connect, and the termination of protuberance 1321 is provided with inclined plane 1323.

Mould 2 is by being installed in fixed form 11 respectively, but the fixed die 21 on the moving platen 12, but dynamic model 22, oil pressure ftercompction structure 23 and sideslip mould 24 constitute, but fixed die 21 constitutes foundry goods end face die cavity 251 with dynamic model 22 adjacent faces, but below the end face adjacent of fixed die 21, be provided with the radially running channels 211 that an end and foundry goods end face die cavity 251 peripheries connect and the depression 212 of ccontaining oil pressure ftercompction structure 23 with dynamic model 22, radially the other end of the other end of running channel 211 and flow dividing structure 13 connects, as shown in Figure 5, radially running channel 211 both sides are provided with and this buffer structure 213 of connecting of running channel 211 radially, buffer structure 213 is for tangentially extending outwardly, and is located at the radially junction of running channel 211 and foundry goods die cavity 25; The termination of the push rod 231 of two cover oil pressure ftercompction structures 23 is against respectively on the both ends of the surface of foundry goods end face die cavity 251; But sideslip mould 24 places between fixed die 21 and the dynamic model 22, constitute the circumference foundry goods die cavity 252 that connects with foundry goods end face die cavity 251 in it between the Zhou Yuke dynamic model 22, and make foundry goods end face die cavity 251 and foundry goods circumference die cavity 252 constitute and the corresponding foundry goods die cavity 25 of foundry goods shape.

During die casting, as shown in Figure 2, place the plunger 111 in the material pipe 112 to move inward, alloy liquation 3 in the pressing material pipe 112, make it upwards flow into radially running channel 211, and radially flow in the foundry goods die cavity 25, not only can not produce vortex phenomenon with layer flow mode along flow dividing structure 13, stop air holes in the wheel rim foundry goods, vacuum-pumping equipment in intermediate die and the mould need not be set.

As shown in Figure 3, Figure 4, when alloy liquation 3 was flowed through flow dividing structure 13, lubricant on material pipe 112 walls and the alloy liquation 4 that solidifies were attached to the passage 131 and the junction of material pipe 112 and stratum 1311 places of passage 131 of flow dividing structure 13.

As shown in Figure 5, when alloy liquation 3 during, will expect that once more lubricant on pipe 112 walls and the alloy liquation 4 that solidifies import in the buffer structure 213 of running channel 211 radially, have improved the quality of foundry goods through running channel 211 radially.

Claims

1, a kind of high pressure casting of light alloy hub method, it is for being made in the material pipe alloy liquation in running channel filling foundry goods die cavity by alloy liquation in the plunger compression material pipe, it is characterized in that in the described material pipe alloy liquation through running channel radially with layer flow mode filling foundry goods die cavity radially.

2, high pressure casting of light alloy hub method according to claim 1 is characterized in that the alloy liquation is with regulatable multistage speed filling foundry goods die cavity.

3, high pressure casting of light alloy hub method according to claim 1 and 2 is characterized in that behind alloy melt filling foundry goods die cavity with the ftercompction structure wheel rim foundry goods pressurized.

4, a kind of high pressure casting of light alloy hub equipment, it is made of die casting machine and mould, but establish fixed form and the moving platen that is parallel to each other on the die casting machine at interval, fixed form is provided with the material pipe of ccontaining plunger, it is characterized in that also being provided with on the described die casting machine end and manages the flow dividing structure that connects with material; But but mould is made of the fixed die dynamic model and the sideslip mould that are installed in respectively on the fixed form moving platen, but fixed die constitutes foundry goods end face die cavity with the dynamic model adjacent face, but below the end face adjacent of fixed die, be provided with the radially running channel that an end and foundry goods end face die cavity periphery connects, the radially other end of the other end of running channel and flow dividing structure perforation with dynamic model; But the sideslip mould places between fixed die and the dynamic model, constitutes the circumference foundry goods die cavity that connects with foundry goods end face die cavity in it between the Zhou Yuke dynamic model, and makes foundry goods end face die cavity and foundry goods circumference die cavity constitute and the corresponding foundry goods die cavity of foundry goods shape.

5, high pressure casting of light alloy hub equipment according to claim 4 is characterized in that the described speed that places the plunger in the material pipe to penetrate is regulatable multistage issuing velocity in the material pipe.

6, according to claim 4 or 5 described high pressure casting of light alloy hub equipment, but it is characterized in that describedly being located at flow dividing structure on the fixed die by the passage that connects with the fixed form feeding tube and grip device with the resistance of moving platen interlock and constitute, the passage internal perisporium is provided with a plurality of stratum that progressively enlarge vertically; The end that device is gripped in resistance is provided with the protuberance that places in the passage, and make this protuberance for be corresponding with passage and with the closely spaced variable cross-section body of its formation.

7, high pressure casting of light alloy hub equipment according to claim 6 is characterized in that the minimum diameter of the stratum on the described passage internal perisporium is slightly larger than material pipe diameter.

8, high pressure casting of light alloy hub equipment according to claim 6 is characterized in that described resistance grips the protuberance of device and be provided with and expect to manage and the axial notch that connects of running channel radially.

9, high pressure casting of light alloy hub equipment according to claim 6 is characterized in that the described radially running channel both sides that are located at the fixed die end face are provided with and this buffer structure of connecting of running channel radially.

10, high pressure casting of light alloy hub equipment according to claim 9 is characterized in that described buffer structure for tangentially extending outwardly, and is located at the radially junction of running channel and foundry goods die cavity.

11,, but it is characterized in that on described fixed form moving platen, being provided with oil pressure ftercompction structure to wheel rim foundry goods pressurized according to claim 4 or 5 described high pressure casting of light alloy hub equipment.

12,, it is characterized in that described fixed form end face is provided with the depression of ccontaining oil pressure ftercompction structure according to claim 4 or 5 described high pressure casting of light alloy hub equipment.