CN201889422U - Force-expanding double-template clamping mechanism with four pressure cylinders - Google Patents

Abstract

The utility model relates to a four-pressurized cylinder expanding force type double template mold locking mechanism, two mold clamping oil cylinders are arranged on the mold clamping cylinder base, the head plate is connected with the fixed mold, the mold clamping oil cylinder is driven and connected with the movable seat plate, and the movable mold seat The plate is connected to the movable mold, and the booster mold clamping cylinder is installed on the movable mold base plate. A set of booster cylinders and a second set of booster cylinders, the piston of the booster clamping cylinder is equipped with a nut installation seat plate, and the nut installation seat plate is equipped with a split nut, and the split cylinder body is connected to half of the split nut by driving , the opening and closing oil cylinder piston is driven and connected with the other half of the opening and closing nut, and the opening and closing oil cylinder piston divides the opening and closing oil cylinder body into two cylinders, which are the third group of booster cylinders and the fourth group of booster cylinders. Two mold clamping cylinders are used to drive the movable seat plate for mold clamping, and four pressurized cylinders are used to expand force to clamp the mold. The structure of the mold clamping and mold clamping mechanism is simple, the mold clamping action is fast, and it is stable and reliable.

Description

Four booster cylinder expansion type double platen clamping mechanism

technical field

The utility model relates to a mold locking mechanism, in particular to a four-pressurized-cylinder expansion type double-platen mold locking mechanism.

Background technique

With the intensification of energy crisis and environmental pollution, the concept of low-carbon economy has been put forward, and lightweight and low energy consumption have attracted more and more attention from all countries in the world, becoming the development direction of the future manufacturing industry. It is an inevitable trend in the development of the manufacturing industry that light alloy parts gradually replace some ferrous metal parts. Therefore, the market demand for die casting machines and squeeze casting machines has gradually increased in recent years.

Early die-casting machines had clamping mechanisms driven by a single oil cylinder. This mechanism was simple in structure and reliable in action. However, due to the large diameter of the oil cylinder, high working pressure, difficulty in manufacturing, and low efficiency, it was later improved to a small oil cylinder drive. Clamping mechanism with mechanical expansion force. This mechanism effectively overcomes the shortcomings of the single cylinder clamping mechanism, and is a common mechanism for die-casting machines at present. However, this mechanism also has its own weaknesses, which are manifested in manufacturing: the mechanism is more complicated (except for the crankshaft expansion mechanism, it must be equipped with a mold adjustment mechanism), the manufacturing precision is high, and the manufacturing cost is high. The adjustment of the gap between the adjusting nuts in the mold adjustment mechanism is not uniform, and it is easy to have uneven force on the four large bars, or difficult adjustment of the mold adjustment mechanism, and because the thickness of the mold will change with the temperature of the mold, it must be manually or irregularly adjusted from time to time. Through the intervention of the industrial computer, the mold adjustment mechanism is readjusted.

Squeeze casting can obtain high-density, high-quality light alloy castings. Partial replacement of ferrous metal castings by extrusion casting light alloy parts has great significance in terms of weight reduction, energy saving and consumption reduction. As a new type of advanced casting equipment, the automatic vertical squeeze casting machine has many technical difficulties, among which the clamping mechanism is one of them, and the design of this mechanism directly affects the stability of the squeeze casting machine. The toggle mechanical expansion force clamping mechanism of the traditional horizontal die-casting machine has a large mass and unstable operation, so it is not suitable for vertical squeeze casting machines, especially large-tonnage vertical squeeze casting machines.

Contents of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, and provide a four-pressurized cylinder expansion type double-platen mold clamping mechanism, which uses two mold clamping oil cylinders to drive the movable seat plate to close the mold, and uses four booster cylinders Perform locking.

The purpose of this utility model is achieved through the following technical solutions:

The four-pressurized cylinder expansion type double-platen mold clamping mechanism includes a mold clamping cylinder base, a large bar, and a head plate. The mold clamping cylinder base is equipped with two mold clamping oil cylinders opposite to the left and right sides of the large bar. Connect the fixed mold, and it is characterized in that: the mold clamping oil cylinder is driven and connected with the movable seat plate, the movable seat plate is connected with the movable mold, the booster clamping cylinder is installed on the movable mold seat plate, and the booster lock The cylinder body of the mold oil cylinder and the movable seat plate are of an integrated structure. The piston of the booster clamping oil cylinder divides the booster cylinder into two cylinders, which are the first group of booster cylinders and the second group of booster cylinders. A nut installation seat plate is installed on the piston of the clamping oil cylinder, and a split nut is installed on the nut installation seat plate. The split nut is driven by an oil cylinder, and half of the split nut is driven and connected with the block of the split oil cylinder. , the other half of the opening and closing nut is drivingly connected with the opening and closing oil cylinder piston, and the opening and closing oil cylinder piston divides the opening and closing oil cylinder body into two cylinders, which are respectively the third group of booster cylinders and the fourth group of booster cylinders. The internal thread of the opening and nut matches the external thread of the large bar.

Further, the above-mentioned four-pressurized-cylinder expanding force-type double-platen mold clamping mechanism, wherein a magnetic scale is arranged on the movable seat plate.

The substantive features and progress of the technical solution of the utility model are mainly reflected in:

Two mold clamping cylinders are used to drive the movable seat plate for mold clamping, and four pressurized cylinders are used to expand force to clamp the mold. The structure of the mold clamping and mold clamping mechanism is simple, without the need for toggles and mold adjustment structures, and the mold clamping action is fast and stable. reliable. The quality of the mold clamping and mold locking mechanism of the utility model is greatly reduced, which lays a technical foundation for the development of a large-tonnage vertical squeeze casting machine.

Description of drawings

Below in conjunction with accompanying drawing, technical scheme of the utility model is further described:

Fig. 1 is a schematic diagram of a four-pressurized cylinder expansion type double-platen mold clamping mechanism;

Figure 2a is a partial schematic diagram of the opening and the nut;

Fig. 2b is a schematic top view of the split nut.

See the table below for the meanings of the symbols in the figure:

Detailed ways

As shown in Figures 1, 2a, and 2b, the four-pressurized cylinder expansion type double-platen mold clamping mechanism has a mold clamping cylinder base 26, a large bar 2, and a head plate 11. Two relatively large bars 2 are mounted on the mold clamping cylinder base 26. The mold clamping cylinder 1 on the left and right sides, the head plate 11 is connected to the fixed mold 10, the mold clamping cylinder 1 is driven and connected to the movable seat plate 8, the movable mold base plate 8 is connected to the movable mold 9, and the mold clamping cylinder is installed on the movable mold base plate 8 Piston 7, clamping cylinder piston divides clamping cylinder into two cylinders, respectively the first group of pressurized cylinders 22 and the second group of pressurized cylinders 23, the top of the clamping cylinder piston 7 is equipped with nut mounting seat plate 5, and Split nut 3 is housed on the nut installation seat plate 5, the left half split nut 20 of split nut 3 is driven and connected with split oil cylinder body 14, and the right half split nut 15 of split nut 3 is connected with split oil cylinder piston. 13 Drive connection, the opening and closing cylinder piston divides the opening and closing cylinder into two cylinders, which are the third group of booster cylinders 24 and the fourth group of booster cylinders 25. The inner thread of the nut 3 matches the outer thread of the big bar 2 , The movable seat plate 8 is provided with a magnetic scale 12 .

The mold clamping cylinder seat is equipped with two clamping oil cylinders 1 on the left and right sides of the relatively large bar 2 to drive the movable seat plate 8, and four large booster cylinders are equipped on the four large bar holes of the movable template. Before the movable mold 9 of the mold is close to the fixed mold 10, the mold clamping cylinder 1 is used to drive the movable seat plate 8, and the movable seat plate is stopped at the position where the movable mold is about to approach the fixed mold and the trapezoidal groove of the split nut 3 and the trapezoidal shape of the large bar 2 are ensured. The position where the groove can be fastened accurately, the opening and closing oil cylinder drives the opening and closing nut 3 to be accurately buckled on the large bar 2. At this time, the second group of pressurized cylinders is filled with high-pressure hydraulic oil, and the pressurized mold clamping starts. The clamping cylinder piston 7 and the nut mounting seat plate 5 are fastened and connected by bolts, the split nut 3 can only slide on the nut mounting seat plate 5, and the split nut 3, the nut mounting seat plate 5, and the locking cylinder piston 7 are relatively large The bar 2 cannot move in the axial direction, and the high-pressure oil can push the movable seat plate 8 close to the shaping head plate 11 to complete the mold clamping action. The pressurized oil cylinder has a large area and high oil pressure, which can provide greater clamping force.

After the mold clamping action is completed, the filling, extrusion, and pressure holding actions can be performed, and the mold is opened after the pressure holding is completed. When opening the mold, first empty the high-pressure oil in the second group of pressurized cylinders to ensure that the piston 7 of the mold clamping cylinder is at the lowest limit, that is, the relative position of the movable seat plate and the piston of the mold clamping cylinder returns to the state before mold clamping, and then close the mold The oil cylinder 1 drives the movable seat plate 8 to move up to a proper position, the mold clamping oil cylinder stops filling with oil, and the mold opening ends.

There is a trapezoidal groove on the upper end of the big bar, which is of the same specification as the trapezoidal groove of the split nut. In order to ensure that the split nut 3 and the big bar 2 can be fastened accurately, the present invention uses a magnetic scale 12 to adjust the stroke of the movable seat plate 8. control. When the clamping oil cylinder 1 drives the movable seat plate to go down or up, the movement displacement is an integer multiple of the width of the trapezoidal groove of the big bar.

The opening and closing nut is controlled by the oil cylinder. The opening and closing nut is mainly composed of three wholes, one: the whole 1 composed of the opening and closing oil cylinder piston 13, the right half opening and closing nut 15, the travel switch 17 and the right limit sleeve 18; Two: the whole body 2 composed of the opening and closing cylinder block 14, the left half opening and closing nut 20, the connecting rod 16, and the left limit sleeve 19; the third: the nut mounting seat plate 5, the opening and closing pressure plate 4, and the right limit block 6 And the frame limiting whole 3 that left limiting block 21 forms. The whole 1 and the whole 2 are restricted by the opening and closing pressure plate 4, and can only slide along the axis of the cylinder piston, and the left and right limit positions of the sliding are respectively the left limit block 21 and the right limit block 6. During the nut opening and closing process, the third cylinder in the opening and closing cylinder body is filled with oil, and the opening and closing oil cylinder piston 13 drives the right half opening and closing nut 15 to move to the right, while the opening and closing oil cylinder body 14 pushes the left half opening and closing nut 20 directions Move to the left, after the travel switch 17 touches the left limit sleeve 19, the oil cylinder stops filling with oil, and the opening process of the opening and closing nut ends; the fourth cylinder in the piston of the opening and closing oil cylinder is filled with oil, the whole 1 moves to the left, and the whole 2 moves to the right , the travel switch 17 runs into the right limit sleeve 18 and the oil cylinder stops charging, and the opening and closing nut 3 is closed.

When the cylinder is filled with oil, which part of the whole body 1 and the whole body 2 moves first, or at the same time, does not affect the final nut opening and closing action. Assuming that when the nut is opened, the third cylinder in the opening and closing cylinder is filled with oil, the whole 2 does not move, and the whole 1 moves to the right first, and when the right half of the opening and closing nut 15 touches the right limit block 6, it cannot continue to move to the right move, but at this time the limit sleeve does not touch the opening and closing limit switch 17, the oil cylinder continues to be filled with oil and the whole 1 stops moving, then the whole 2 must move to the left under the action of hydraulic oil, and the left half of the opening and closing nut 20 touches the left Before the limit block 21, the travel switch 17 hits the left limit cover 19 earlier, the oil cylinder stops filling oil, and the open process of the split nut 3 ends.

It should be emphasized that: the above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model in any form. Any simple modification, equivalent change and Modifications still belong to the scope of the technical solution of the utility model.

Claims (2)

1. Four pressurized cylinder expansion type double template clamping mechanism, including mold clamping cylinder base, large bar and head plate. The mold clamping cylinder base is equipped with two mold clamping oil cylinders opposite to the left and right sides of the large bar. The head plate is connected to the fixed mold, and it is characterized in that: the mold clamping oil cylinder is driven and connected with the movable seat plate, the movable seat plate is connected with the movable mold, and the booster clamping oil cylinder is installed on the movable mold seat plate, and the booster The cylinder body of the pressure clamping cylinder and the movable seat plate are of an integrated structure. The piston of the booster clamping cylinder divides the booster cylinder into two cylinders, which are the first group of booster cylinders and the second group of booster cylinders. A nut installation seat plate is installed on the piston of the pressurized clamping cylinder, and a split nut is installed on the nut installation seat plate. The split nut is driven by an oil cylinder, and half of the split nut is connected to the block of the split cylinder Drive connection, the other half of the opening and closing nut is drivingly connected with the opening and closing oil cylinder piston, and the opening and closing oil cylinder piston divides the opening and closing oil cylinder body into two cylinders, which are respectively the third group of booster cylinders and the fourth group of booster cylinders, The internal thread of the described opening and nut matches the external thread of the large bar. 2. The four-pressurized-cylinder expanding-force double-platen mold clamping mechanism according to claim 1, characterized in that: said movable seat plate is provided with a magnetic scale.

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