CN219188581U

CN219188581U - Core-pulling and extrusion composite mechanism in non-demolding direction

Info

Publication number: CN219188581U
Application number: CN202223503075.0U
Authority: CN
Inventors: 李元强
Original assignee: Chongqing Merican Technology Co ltd
Current assignee: Chongqing Merican Technology Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-06-16
Anticipated expiration: 2032-12-27

Abstract

The utility model discloses a core-pulling and extrusion composite mechanism in a non-demoulding direction, which is characterized in that: the core pulling device comprises a fixing seat and a conducting bar which are arranged on a die, wherein a core pulling oil cylinder is arranged on the fixing seat, the fixing seat is connected with the bottom of a core pulling oil cylinder body, a core pulling oil cylinder base is arranged on the cylinder body of the core pulling oil cylinder in a sliding sleeve mode, a piston rod of the core pulling oil cylinder is connected with the core pulling oil cylinder base through a switching structure, an extrusion oil cylinder is arranged on the core pulling oil cylinder base, the front end of the piston rod of the extrusion oil cylinder is connected with a sliding block through a connecting rod, the sliding block is arranged on the conducting bar in a sliding mode, and one end of the sliding block is provided with an extrusion core. The beneficial effects of the utility model include: the structure realizes the smooth demolding of the precast core in the non-demolding direction, simultaneously realizes the two-section extrusion casting, obviously improves the local quality of the cast thread precast hole, avoids the thread tooth rot problem caused by shrinkage cavity shrinkage porosity, has reasonable structural space arrangement, can realize the secondary extrusion under the condition of not increasing the volume of the die, and reduces the die cost.

Description

Core-pulling and extrusion composite mechanism in non-demolding direction

Technical Field

The utility model relates to the field of die casting, in particular to a core pulling and extruding composite mechanism in a non-demolding direction.

Background

Die casting is a method in which liquid or semi-liquid metal is filled into a cavity of a die casting mold at a high speed under high pressure and rapidly solidified under pressure to obtain a cast product. The side parting core pulling mechanism is the most commonly used mechanism in a die casting die, and when the characteristics of an inner side recess or a side hole and the like which are different from the die opening direction on a casting block the direct die-casting of the die casting, the characteristics of a formed side hole or side recess must be made into a movable core in a non-die-casting direction.

The existing core pulling mechanism in the non-demolding direction only pushes a core into a mold cavity through an oil cylinder after mold closing, and after the metal liquid is cooled, the oil cylinder retracts to withdraw the core from the mold cavity and then opens the mold to take a piece, but the core pulling structure has the advantages that the mold filling speed of the liquid metal liquid in the mold cavity is extremely high, the mold filling process is unstable, turbulence flow is aggravated, splashing gas wrapping, oxidation inclusion and the like of the metal liquid are caused, so that the quality problems of shrinkage cavity, shrinkage porosity and the like in a casting mold position can be caused, the problem is solved, the conventional method for solving the problem is that an extrusion pin is adopted locally to extrude the metal liquid for the second time in a semi-solidification state, the local quality of the casting is improved, so that the local metallographic structure is more compact, but the core pulling structure in the prior art can not realize the secondary extrusion, and the extrusion mechanism is independently arranged needs larger installation space, so that the whole mold volume is increased, the cost is increased, and the technical difficulty is also increased.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides the core pulling and extrusion composite mechanism in the non-demolding direction, the core pulling casting in the non-demolding direction can realize secondary extrusion casting, the local quality of castings is improved, and meanwhile, the structure is simple and the space occupation is small.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a loose core, extrusion mechanism of non-drawing of patterns direction which characterized in that: including installing fixing base, the conducting bar on the mould, be provided with the hydro-cylinder of loosing core on the fixing base, the fixing base with the hydro-cylinder body bottom of loosing core is connected, the cover is equipped with the hydro-cylinder base of loosing core on the hydro-cylinder body of loosing core, the piston rod of hydro-cylinder of loosing core pass through the switching structure with the hydro-cylinder base of loosing core is connected, be provided with the extrusion hydro-cylinder on the hydro-cylinder base of loosing core, the piston rod front end of extrusion hydro-cylinder is connected with the slider through the connecting rod, the slider slide set up in on the conducting bar, slider one end is provided with the extrusion core.

Further, the number of the fixing seats is two, the fixing seats are arranged at intervals, each fixing seat is provided with a core-pulling oil cylinder, two ends of the base of the core-pulling oil cylinder are provided with through holes sleeved on the cylinder body of the core-pulling oil cylinder, and the extrusion oil cylinder is fixedly arranged in the middle of the base of the core-pulling oil cylinder.

Further, the switching structure comprises a connecting block arranged at the front end of the core-pulling oil cylinder rod, the connecting block is square, four corners of the connecting block are respectively provided with a connecting rod, and one end of the connecting rod is connected with the core-pulling oil cylinder base.

Further, the extending direction of the cylinder rod of the core pulling oil cylinder is opposite to the extending direction of the cylinder rod of the extrusion oil cylinder.

Further, a touch rod is arranged on the connecting rod, two travel switches are arranged on the core pulling oil cylinder base, and protrusions for triggering the two travel switches are arranged on the touch rod.

Further, the outer side of the extrusion core is sleeved with a pin sleeve, the pin sleeve is embedded on the die, the rear end of the pin sleeve is provided with a pin sleeve top plate, and the pin sleeve top plate is fixedly arranged on the die.

The beneficial effects of the utility model include: the structure realizes core-pulling die casting in the non-demolding direction, simultaneously realizes two-section extrusion casting, remarkably improves the local quality of castings, avoids the problem of shrinkage cavity shrinkage porosity of important parts of castings, has reasonable structural space arrangement, can realize secondary extrusion without increasing the volume of the die any more, and reduces the cost of the die.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Detailed Description

The utility model will be described in further detail with reference to specific embodiments and drawings.

A loose core and extrusion composite mechanism in a non-demolding direction as shown in fig. 1 is used for being installed on a movable die or a fixed die of a die casting die, and structurally comprises two fixed bases 1 and guide bars 2 which are installed on the die, wherein the number of the fixed bases 1 is two, the fixed bases 1 are arranged at intervals, and a loose core oil cylinder 3 is arranged on each of the two fixed bases 1. The fixing seat 1 is connected with the bottom of the core-pulling oil cylinder 3, and through holes sleeved on the core-pulling oil cylinder 3 are formed in two ends of the core-pulling oil cylinder base 4. The cylinder bodies of the two core-pulling oil cylinders 3 are sleeved with core-pulling oil cylinder bases 4 in a sliding mode, and piston rods of the core-pulling oil cylinders 3 are connected with the core-pulling oil cylinder bases 4 through a switching structure 5, so that the core-pulling oil cylinder bases 4 are driven to slide along the cylinder bodies. The core-pulling oil cylinder base 4 is provided with an extrusion oil cylinder 6, the extrusion oil cylinder 6 is fixedly arranged in the symmetrical middle of the core-pulling oil cylinder base 4, the front end of a piston rod of the extrusion oil cylinder 6 is connected with a sliding block 8 through a connecting rod 7, and the extending direction of a cylinder rod of the core-pulling oil cylinder 3 is opposite to that of the cylinder rod of the extrusion oil cylinder 6. The sliding block 8 is arranged on the guide bar 2 in a sliding manner, one end of the sliding block 8 is provided with an extrusion core 9, the outer side of the extrusion core 9 is sleeved with a pin sleeve 12, the pin sleeve 12 is embedded on a die, the rear end of the pin sleeve 12 is provided with a pin sleeve top plate 13, and the pin sleeve top plate 13 is fixedly arranged on the die.

The core pulling and extruding mechanism is compact in structure and small in occupied space, when the core pulling oil cylinder 3 works, the core pulling oil cylinder base 4 is driven to slide along the cylinder body, so that the extruding oil cylinder 6 is driven to move, at the moment, a piston rod of the extruding oil cylinder 6 is in a retracted state, and the sliding block 8 and the extruding core 9 also complete first-stage movement under the action of the core pulling oil cylinder 3, namely the extruding core 9 stretches into a cavity of a die, and the die casting machine waits for injecting molten metal.

In this embodiment as shown in fig. 1, the adapting structure 5 includes a connection block 51 disposed at the front end of the cylinder rod of the core-pulling cylinder 3, the connection block 51 is square, four corners of the connection block are respectively provided with a connection rod 52, and one end of the connection rod 52 pointing to the cylinder body direction is connected with the core-pulling cylinder base 4.

Further, a touch rod 10 is arranged on the connecting rod 7, two travel switches 11 are arranged on the core pulling cylinder base 4, and a protrusion for triggering the two travel switches 11 is arranged on the touch rod 10. When two travel switches 11 are in control connection with the die casting machine, after the die casting machine finishes metal hydraulic injection, extrusion signals are given, at the moment, the extrusion oil cylinder 6 starts to work, the slide block 8 is pushed to move through the connecting rod 7, the extrusion core 9 is pushed to further extend into the die cavity, and the metal liquid in a semi-solidification state is extruded, so that the metal liquid is locally pressed more densely. At the same time, the travel switch 11 feeds back whether the maximum extrusion travel is reached; after the pressure retention of the die casting machine is finished, the die casting machine gives a signal, the extrusion cylinder 6 is retracted, the extrusion core 9 is pulled back to the initial state, and the touch rod 10 touches the other travel switch 11 to feed back the signal; the core-pulling oil cylinder 3 is retracted to drive the core-pulling oil cylinder base 4, the extrusion oil cylinder 6, the sliding block 8 and the extrusion core 9 to be pulled back and reset together, and the next working cycle is waited.

The foregoing has described in detail the technical solutions provided by the embodiments of the present utility model, and specific examples have been applied to illustrate the principles and implementations of the embodiments of the present utility model, where the above description of the embodiments is only suitable for helping to understand the principles of the embodiments of the present utility model; meanwhile, as for those skilled in the art, according to the embodiments of the present utility model, there are variations in the specific embodiments and the application scope, and the present description should not be construed as limiting the present utility model.

Claims

1. A loose core, extrusion composite mechanism of non-drawing of patterns direction, its characterized in that: including installing fixing base (1), conducting bar (2) on the mould, be provided with core-pulling cylinder (3) on fixing base (1), fixing base (1) with core-pulling cylinder (3) cylinder body bottom is connected, the cover of loosing core is equipped with core-pulling cylinder base (4) on the cylinder body of core-pulling cylinder (3), the piston rod of core-pulling cylinder (3) pass through switching structure (5) with core-pulling cylinder base (4) are connected, be provided with extrusion cylinder (6) on core-pulling cylinder base (4), the piston rod front end of extrusion cylinder (6) is connected with slider (8) through connecting rod (7), slider (8) slide set up in on conducting bar (2), slider (8) one end is provided with extrusion core (9).

2. The non-demolding-direction core pulling and extruding composite mechanism as set forth in claim 1, wherein: the number of the fixing seats (1) is two, the fixing seats (1) are arranged at intervals, one core-pulling oil cylinder (3) is arranged on each fixing seat (1), through holes sleeved on the cylinder body of the core-pulling oil cylinder (3) are formed in two ends of the core-pulling oil cylinder base (4), and the extrusion oil cylinder (6) is fixedly arranged in the middle of the core-pulling oil cylinder base (4).

3. The non-demolding-direction core pulling and extruding composite mechanism as set forth in claim 1, wherein: the switching structure (5) comprises a connecting block (51) arranged at the front end of a cylinder rod of the core-pulling cylinder (3), the connecting block (51) is square, four corners of the connecting block are respectively provided with a connecting rod (52), and one end of the connecting rod (52) is connected with the core-pulling cylinder base (4).

4. The non-demolding-direction core pulling and extruding composite mechanism as set forth in claim 1, wherein: the extending direction of the cylinder rod of the core pulling oil cylinder (3) is opposite to the extending direction of the cylinder rod of the extrusion oil cylinder (6).

5. The non-demolding-direction core pulling and extruding composite mechanism as set forth in claim 1, wherein: the core pulling oil cylinder is characterized in that a touch rod (10) is arranged on the connecting rod (7), two travel switches (11) are arranged on the core pulling oil cylinder base (4), and protrusions triggering the two travel switches (11) are arranged on the touch rod (10).

6. The non-demolding-direction core pulling and extruding composite mechanism as set forth in claim 1, wherein: the extrusion mold core (9) is characterized in that a pin sleeve (12) is sleeved outside the extrusion mold core, the pin sleeve (12) is embedded on the mold, a pin sleeve top plate (13) is arranged at the rear end of the pin sleeve (12), and the pin sleeve top plate (13) is fixedly installed on the mold.