A plunger stop device and a plunger stopping method

Abstract

The application discloses a plunger stop device and a stop method, and the stop device comprises a supporting rod connected between a fixed die plate and a pressurizing system base plate, a supporting frame installed on the supporting rod, a hydraulic oil cylinder installed on the supporting frame, and a stop joint connected to the end of the piston rod of the hydraulic oil cylinder. The stop joint is in a strip shape and has a U-shaped cross section, one side of the stop joint opposite to the opening side is connected to the end of the piston rod of the hydraulic oil cylinder, and the length of the stop joint is equal to the distance between the flange connected to the horizontal punch and the flange of the hydraulic cylinder of the horizontal punch when the horizontal punch reaches the liquid delivery stop position in the horizontal cylinder. The mechanical stop method that the stop joint is clamped between the flange connected to the horizontal punch and the flange of the hydraulic cylinder of the horizontal punch can avoid the problem that the horizontal punch retreats due to the leakage of the hydraulic cylinder.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of die casting, in particular to a pressure injection punch stop device and a stop method. BACKGROUND

[0002] In a horizontal feeding-vertical extrusion system, the horizontal punch must stop at a specified liquid feeding stop position after feeding into the vertical cylinder. If the pressure of vertical pressure injection causes the horizontal punch to retreat, the vertical pressure injection pressure cannot be fully transmitted to the die casting product, resulting in a non-dense die casting product, and the metal liquid will also flow into the horizontal cylinder. To prevent the horizontal punch from retreating, the current method is to use hydraulic stop, which has the disadvantage that hydraulic system leakage cannot reliably ensure that the horizontal punch does not retreat, so it is necessary to use a reliable stop method. SUMMARY

[0003] To solve the above problems, the present application provides a pressure injection punch stop device, comprising:

[0004] a support rod connected between the fixed die plate and the booster system base plate,

[0005] a support frame installed on the support rod,

[0006] a hydraulic cylinder installed on the support frame, the piston rod end of the hydraulic cylinder is connected to a stop joint,

[0007] the stop joint is strip-shaped and has a U-shaped cross section, one side opposite to the opening side is connected to the piston rod end of the hydraulic cylinder, and the length of the stop joint is equal to the distance between the horizontal punch connecting flange and the horizontal punch cylinder flange when the horizontal punch reaches the liquid feeding stop position in the horizontal cylinder.

[0008] Optionally, the support frame includes two groups of spaced apart clamping plates, each group of clamping plates includes a pair of clamping plates, any pair of clamping plates has a shape matching the outer contour of the support rod, any pair of clamping plates clamps the support rod and is fixed on the support rod by bolts, a support plate is connected between the two groups of clamping plates, the cylinder body of the hydraulic cylinder is installed on the support plate, and the piston rod of the hydraulic cylinder is connected to the stop joint through the support plate.

[0009] Optionally, the opening width of the U-shaped cross section is greater than or equal to the outer diameter of the piston rod of the horizontal punch cylinder.

[0010] Optionally, a guide mechanism is further provided, the guide mechanism includes a guide sleeve and a guide rod, the guide sleeve is fixed on the support frame, the guide rod is sleeved in the guide sleeve, and the end of the guide rod protruding out is connected to the stop joint.

[0011] Optionally, each hydraulic cylinder has a guide mechanism on both sides.

[0012] Optionally, a pair of clamping plates are fixedly connected to the support rod by bolts at both ends of the support rod.

[0013] The application also provides a method for stopping the injection punch, which adopts the injection punch stopping device described above and performs the following steps:

[0014] When the horizontal punch is at the horizontal punch zero position, the metal liquid is poured into the pouring port, the horizontal punch moves forward in the horizontal cylinder to feed the vertical cylinder, when the horizontal punch moves to the liquid feeding stop position, the hydraulic cylinder pushes the stopping joint to move and be clamped between the horizontal punch connecting flange and the horizontal punch cylinder flange;

[0015] The vertical punch is extended from the vertical punch zero position to perform injection, so that the metal liquid enters the mold cavity;

[0016] After pressure maintaining and cooling, the vertical punch retreats to the vertical punch zero position;

[0017] When the mold is opened, the horizontal punch continues to move forward to track the ejection of the die casting product from the fixed mold;

[0018] The hydraulic cylinder drives the stopping joint to move away from the horizontal punch connecting flange and the horizontal punch cylinder flange, and the horizontal punch retreats to the horizontal punch zero position.

[0019] The application adopts the mechanical stopping method that the stopping joint is clamped between the horizontal punch connecting flange and the horizontal punch cylinder flange, which can avoid the problem of horizontal punch retreat caused by the leakage of the hydraulic cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the injection punch stopping device of the embodiment of the application.

[0021] Figure 2 It is a schematic diagram of the stopping joint of the embodiment of the application.

[0022] Figure 3 It is a schematic diagram of the horizontal punch at the horizontal punch zero position of the embodiment of the application.

[0023] Figure 4 It is a schematic diagram of the horizontal punch at the liquid feeding stop position of the embodiment of the application.

[0024] Figure 5 It is a schematic diagram of the horizontal punch ejecting the die casting product from the fixed mold of the embodiment of the application. DETAILED DESCRIPTION

[0025] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0026] As shown in Figure 1 , the injection punch stop device 100 of the present embodiment comprises a hydraulic cylinder 1, a stop joint 2, a horizontal punch cylinder flange 3, a horizontal punch connecting flange 4, a support rod 5, a support plate 6, a support frame 7 and a guide mechanism 8. The support rod 5 is connected between the fixed die plate 10 and the supercharging system base plate 20, one end of which is fixedly connected with the fixed die plate 10 and the other end of which is fixedly connected with the supercharging system base plate 20. However, the mounting position of the support rod is not limited in the present embodiment, and the support rod can also be mounted on another fixing mechanism.

[0027] The support frame 7 is mounted on the support rod 5, and the specific mounting manner is not limited. For example, as shown in Figure 1 , the support frame 7 comprises two groups of spaced apart clamping plates, each group of clamping plates comprising a pair of clamping plates, any pair of clamping plates can have a shape matching the outer contour of the support rod 5. For example, the support rod 5 is cylindrical, and the clamping plates can have a circular arc shape matching the outer contour of the support rod 5, and the clamping plates can be clamped on the outer periphery of the support rod 5. For example, the support rod 5 can also be a square column, and the clamping plates have a square opening matching the outer contour thereof, and a pair of clamping plates are buckled on the radial two sides of the support rod 5, and the pair of clamping plates are fastened by bolts, so that the support frame 7 can be fixed on the support rod 5. The upper part of the pair of clamping plates beyond the support rod 5 can be connected by bolts, and the lower part of the pair of clamping plates beyond the support rod 5 can also be connected by bolts, so that the support frame 7 can be stably mounted on the support rod 5.

[0028] The support plate 6 is connected between the two groups of clamping plates, one end of the support plate 6 is connected with one group of clamping plates, and the other end of the support plate 6 is connected with the other group of clamping plates. The hydraulic cylinder 1 is mounted on the support plate 6, the cylinder body of the hydraulic cylinder 1 is fixed on the support plate 6, the piston rod of the hydraulic cylinder passes through the support plate 6, and the stop joint 2 is connected at the end of the piston rod of the hydraulic cylinder.

[0029] The horizontal punch is connected to the end of the piston rod of the horizontal oil cylinder through the horizontal punch connecting flange 4. When the horizontal punch pushes the metal liquid into the vertical cylinder, there is a gap between the horizontal punch connecting flange 4 and the horizontal punch oil cylinder flange 3. The stopper 2 is a strip with a U-shaped cross-section. The opposite sides of the opening of the U-shaped cross-section are connected to the end of the piston rod of the hydraulic cylinder 1. Preferably, the width of the opening is greater than or equal to the outer diameter of the piston rod of the horizontal oil cylinder, so that the opening of the stopper 2 can be inserted into the horizontal oil cylinder piston rod between the horizontal punch connecting flange 4 and the horizontal punch oil cylinder flange 3. Moreover, the length of the stopper 2 is equal to the distance between the horizontal punch connecting flange 4 and the horizontal punch oil cylinder flange 3 when the horizontal punch reaches the liquid delivery stop position in the horizontal cylinder. Even if the metal liquid in the vertical punch stamping die cavity has a certain impact on the horizontal punch, the horizontal punch will not back off because the stopper 2 is stuck in the gap.

[0030] In addition, there is a guide mechanism, which includes a guide sleeve 9 and a guide rod 11. The guide sleeve can be fixed on the support frame 7, and the guide rod 11 is inserted into the guide sleeve. The end of the guide rod is connected to the stopper 2. Preferably, there is a guide rod 11 on both sides of the piston rod of the hydraulic cylinder 1.

[0031] The present application also provides a method for preventing the horizontal punch from back-off, which uses the horizontal punch stopper device described above, and performs the following steps:

[0032] Step S1: The horizontal punch 30 is at the horizontal punch zero position (as shown in Figure 3 After the metal liquid is poured into the pouring hole, the horizontal punch 30 moves forward in the horizontal cylinder to deliver liquid into the vertical cylinder, so that the metal liquid flows from the horizontal cylinder into the vertical cylinder. When the horizontal punch reaches the liquid delivery stop position (as shown in Figure 4 The liquid delivery stop position is a conventional means for delivering liquid and pressing in the art, which will not be described further. The hydraulic cylinder 1 pushes the stopper 2 down and inserts it between the horizontal punch connecting flange 4 and the horizontal punch oil cylinder flange 3, preventing the horizontal punch 30 from back-off.

[0033] Step S2: The vertical punch 40 starts to press from the vertical punch zero position, and the metal liquid is pressed into the mold cavity at high speed and high pressure. It should be noted that Figures 3 to 5 The display of the mold cavity is omitted in the figure.

[0034] Step S3: After pressure maintaining and cooling, the die casting product is formed, and the vertical punch is retracted to the vertical punch zero position.

[0035] Step S4, at the same time of opening the mold, the horizontal punch 30 continues to advance to a position beyond the surface of the fixed mold (as shown in Figure 5 Fig. 2), and the die casting product is tracked out of the fixed mold.

[0036] Step S5, the hydraulic cylinder 1 drives the said stop joint 2 to move up to be separated from the horizontal punch connecting flange 4 and the horizontal punch cylinder flange 3, and the horizontal punch retreats to the horizontal punch zero position.

[0037] Of course, the present application can have other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present application without departing from the spirit and essence of the present application, and these corresponding changes and modifications all belong to the protection scope of the claims of the present application.

Claims

1. A device for preventing the recoil of an injection punch, characterized in that, include: Support rod, connecting the fixed template and the pressurization system base plate; Support frame, the support frame is mounted on the support rod; A hydraulic cylinder is mounted on the support frame, and a stop joint is connected to the end of the piston rod of the hydraulic cylinder. The anti-reverse connector is strip-shaped with a U-shaped cross-section. The opposite sides of the open side of the U-shape are connected to the end of the piston rod of the hydraulic cylinder. The length of the anti-reverse connector is equal to the distance between the horizontal punch connecting flange and the horizontal punch cylinder flange when the horizontal punch reaches the liquid delivery stop position in the horizontal barrel. The support frame includes two sets of spaced-apart clamps, each set including a pair of clamps. Each pair of clamps has a shape that matches the outer periphery of the support rod. Each pair of clamps clamps the support rod and is fixed to it with bolts. A support plate connects the two sets of clamps. The cylinder body of the hydraulic cylinder is mounted on the support plate, and the piston rod of the hydraulic cylinder passes through the support plate and connects to a locking joint. It also has a guiding mechanism, which includes a guide sleeve and a guide rod. The guide sleeve is fixed on the support frame, and the guide rod is sleeved inside the guide sleeve. The protruding end of the guide rod is connected to the anti-reverse joint.

2. The injection punch anti-recoil device according to claim 1, characterized in that, The opening width of the U-shape is greater than or equal to the outer diameter of the piston rod of the horizontal punch cylinder.

3. The injection punch anti-recoil device according to claim 1, characterized in that, There is a guide mechanism on each side of the hydraulic cylinder.

4. The injection punch anti-recoil device according to claim 1, characterized in that, Secure a pair of clamps to the support rod with bolts at both ends of the clamps that extend beyond the support rod.

5. A method for preventing the ejection of a pressure injection punch, comprising the following steps using the pressure injection punch anti-recoil device as described in any one of claims 1 to 4: When the horizontal punch is at the zero position, the molten metal is poured into the pouring port. The horizontal punch moves forward in the horizontal barrel to feed the material to the vertical feed cylinder. When the horizontal punch moves to the liquid feeding stop position, the hydraulic cylinder pushes the anti-reverse joint to move and lock between the horizontal punch connecting flange and the horizontal punch cylinder flange. The vertical punch extends from the zero position to inject molten metal into the mold cavity; After holding the pressure and cooling, the vertical punch retracts to the zero position. As the mold opens, the horizontal punch continues to advance, tracking and ejecting the die-casting part from the fixed mold. The hydraulic cylinder drives the anti-reverse joint to move away from the horizontal punch connecting flange and the horizontal punch cylinder flange, and the horizontal punch retracts to the horizontal punch zero position.

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