JPH0239644Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a trimming press used in a die-casting machine, and particularly to an air blowing device provided in a lower mold when trimming a die-cast product.

[Conventional technology]

Conventionally, in fully automatic die casting machines,
When a die-cast product is automatically trimmed using a vertical trimming press, burrs and overflow from the cut product remain on the lower mold, so in order to remove these from the lower mold, the lower mold is placed in a specified position with a bolster. A mechanism is provided for moving the remaining material to a position and then inverting the lower mold to cause the remaining material to fall into a discharge chute. In this case, the above-mentioned burrs and overflow adhering to the lower mold are forcibly removed by air blowing from the outside of the lower mold. Cold water adheres to the mold cutter, and if it adheres to the cutter part of the mold, it will be difficult to remove. In other words, in the past, it was difficult to install an air blow nozzle on the bolster on which the lower mold was placed.
Since air blow nozzles are installed around the trimming press machine, burrs and overflow cannot be removed sufficiently.

From this point of view, the applicant first carried out an air blow operation on the mold in the most efficient way when removing the trimmed product residue from the discharge chute, and removed the residue stuck to the lower mold. We have developed an air blowing device that can reliably remove the particles. This air blowing device is equipped with a movable bolster on a base, a lower mold is placed and fixed on the movable bolster, and is configured to move forward and backward with respect to a press center, so that the upper mold can be raised and lowered above the press center. , a reversing mechanism for the movable bolster is provided at the retreating end of the movable bolster of the base, a ventilation passage is bored in the movable bolster, and one end of the ventilation passage is provided inside the mold. A nozzle is connected to the distributor, and the nozzle is directed toward the cut edge of the mold. An air supply pipe that aligns with and abuts the opening is provided in a part of the base. The air blowing device configured in this way removes residual material from the die-cast product that adheres to the mold during trimming, such as burrs and overflow, from inside the mold along the edges of the cut portion when the mold is inverted. It can be removed by air blowing.

[Problem that the invention attempts to solve]

However, since the above-mentioned air blowing device needs to be installed inside the mold, there is a problem in that when the air blowing device is integrated with the mold, the air blowing device must be installed inside all the molds. Therefore, when the air blowing device is constructed and arranged separately from the mold, there is a problem that the work for setting the mold and the air blowing nozzle at appropriate positions with respect to the bolster becomes complicated.

Therefore, the purpose of this invention is to install an air blowing nozzle outside the mold on the bolster where the lower mold is attached when installing an air blowing device in the discharge chute of a trimming press machine to remove the residual material of the trimmed die-cast product. It is an object of the present invention to provide a lower mold air blowing device for a trimming press machine, which facilitates setting with a mold and can be easily and economically applied to conventional molds.

[Means for solving problems]

The lower mold air blowing device for a trimming press machine according to the present invention is configured such that a bolster is provided on the base, the lower mold is placed and fixed on the bolster, and the lower mold is movable forward and backward with respect to the press center. In a trimming press machine, which has an upper mold that can be raised and lowered upwardly and a reversing mechanism for the bolster at the forward end of the bolster of the base, an air passage is bored in the bolster, and one end of the air passage is connected to the bolster. A plurality of air blowing nozzles are connected to the open end of the air passage, which is opened outward from the mold mounting position on the surface, and are oriented toward the edge of the cutter part of the lower mold via an air supply pipe. It is characterized in that the other end of the passage is opened on the back surface of the bolster, and an air supply pipe is provided in a part of the base, the air supply pipe aligning and abutting this open end when the bolster is reversed.

In the lower mold air blow device of the trimming press machine, the lower mold to be attached to the surface of the bolster and the air blow nozzle to be attached to the outside thereof are constructed separately.

[Effect]

According to the lower mold air blow device of a trimming press machine according to the present invention, a ventilation path is provided in the bolster on which the lower mold is placed, and one side of the ventilation path The opening end of the lower mold is provided outwardly from the mounting position of the lower mold, and a plurality of air pipes are provided at the opening end, respectively, directed from the outside to the edge of the cutter part of the lower mold through an air supply pipe. By connecting and arranging the air blow nozzle, it is possible to appropriately and effectively remove the remaining material adhering to the lower mold when the bolster is reversed. Moreover, since the lower mold air blowing device of the present invention is provided with an air blowing nozzle on the outside of the lower mold on the bolster separately from the lower mold, the lower mold applied thereto is different from the conventional lower mold. Since the air blow nozzle is versatile for various molds, this type of device can be implemented at low cost.

〔Example〕

Next, an embodiment of the lower mold air blowing device of a trimming press machine according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are schematic diagrams of a trimming press machine showing an embodiment of the lower mold air blowing device of the present invention. 1 and 2, reference numeral 10 indicates the base of the trimming press;
A bolster 12 and an operation cylinder 14 for moving the bolster 12 forward and backward with respect to the press center are provided on the top of the base 10. On the bolster 12, a lower mold 16 having an appropriate cutter portion is placed and fixed in a replaceable manner, and above the press center of the base 10 is an upper mold 18;
An operating cylinder 20 is provided for raising and lowering. In addition, as shown in the figure, the operating cylinder 14
A reversing mechanism 24 is provided at one end of the base 10 of the bolster 12, which moves forward, to rotate it downward in a range of about 90° to 180° and drop the remaining material on the bolster 12 into a discharge chute 26.

This reversing mechanism 24 includes a pair of support members 5 that hold the substantially middle portion of the bolster 12 from both sides.
0,50, a reversing platform 52 that performs a reversing operation together with the supporting members 50, 50, and this reversing platform 5.
It is composed of a bending support rod 54 and an operation cylinder 56 for reversing the movement of the rotor. However, the supporting members 50, 50 and the reversing table 52 are supported by a support shaft 22 which is rotatably attached to a part of the base 10, and a bending support rod 54 is provided on the bottom surface of the reversing table 52. One end is pivotally supported, and the other end of the bending support rod 54 is attached to the base 1.
It is pivoted on a part of 0. And the refraction support rod 5
The tip of the operating rod 60 of the operating cylinder 56 is connected to the central bending portion 58 of the rotating shaft 4, and when the operating rod 60 is at its maximum stroke, the bending support rod 54 straightens to move the reversing platform 52 as shown in the figure. Configure it to hold it horizontally. The details of the operation of this reversing mechanism 24 will be described later.

The trimming press machine configured in this way is
A die-cast product is placed on the lower mold 16 on the bolster 12, and the bolster 12 is placed on the operating cylinder 1.
4 to the press center, and then lowering the upper mold 18 onto the lower mold 16 under the action of the operating cylinder 20 to trim the die-cast product. In this case, the trimmed product fits into the upper mold 18, and residual materials such as burrs and overflow of the product remain in the lower mold 16.

Therefore, in order to remove the remaining material left on the lower mold 16, the bolster 12 is returned to the position shown in the figure and the bolster 12 is reversed. Mold 1
In order to reliably remove the remaining material adhering to the material 6, the bolster 12 and the reversing mechanism 24 are provided with an air blowing device as shown in FIGS. 3 to 5.

However, the air blow device in the present invention is
For example, as shown in FIGS. 3 and 4, a ventilation passage 28 is bored in the bolster 12, and this ventilation passage 28
One end 30 is opened outward from the mold mounting position on the surface of the bolster 12, and the other end 32
is opened on the back side of the bolster 12. On the surface of the bolster 12, as shown in FIG. 1 and FIG.
One end of the air supply pipes 34, 34 disposed on the outside of the lower mold 16 is connected to each of the air supply pipes 34, 30, and the ends of the cut portions 36 of the lower mold 16 are connected to It consists of a plurality of air blow nozzles 38 connected and arranged in a oriented manner. On the other hand, for the back side of the bolster 12,
As shown in FIGS. 4 and 5, the air supply pipe 40 is positioned so as to correspond to the open end 32 of the air passage 28 and align and abut the opening of the bolster 12 in the inverted position.
will be established. In addition, at the tip of this air supply pipe 40,
It is preferable to provide a ring made of urethane rubber or the like with excellent wear resistance so as to maintain elastic and airtight contact with the bolster 12, or to provide an O-ring for sealing at the opening end. be. Also,
For this air supply pipe 40, an external air supply pipe 4 is further provided.
2 and is also connected to an air source 46 via an on-off valve 44 as appropriate.

Next, the operation of the lower mold air blowing device according to the present invention configured as described above will be explained.

Now, as shown in FIG. 1, the lower mold 16 on the bolster 12 is
It is assumed that the remaining material after trimming of the die cast product is attached to the die cast product. Therefore, the reversing mechanism 24 is reversed to a predetermined angular position. The reversing operation of the reversing mechanism 24 in this case will be explained in detail with reference to the schematic diagrams shown in FIGS. 6a and 6b. In addition, in FIGS. 6a and 6b, the same components as those of the apparatus shown in FIGS. 1 and 2 will be described with the same reference numbers. First, in FIG. 6a, the bolster 12 is held horizontally on the base 10 by a reversing platform 52. As shown in FIG. Then, the operating cylinder 56 is actuated to retract the operating rod 60 into the operating cylinder 56. As a result, the bending support rod 54 pivots to the left in the figure while gradually bending its central bending portion 58 using the other end pivotally supported by the base 10 as a fulcrum. At the same time, the reversing platform 52, on which one end of the bending support rod 54 is pivotally supported, pivots to the right in the figure using the support shaft 22 as a fulcrum. In this case, although not shown, the bolster 12 held on the reversing table 52 by a pair of support members 50, 50
is engaged in the axial direction of the operating rod 62 at a connecting portion 64 with the tip of the operating rod 62 of the operating cylinder 14, and is coupled so as to be separable in the turning direction. Further, an operating cylinder 56 for operating the bending support rod 54 is held at its middle portion so as to be swingable. Therefore, as the reversing platform 52 rotates, the bolster 12 held by the supporting members 50, 50 can be reversed to the predetermined angular position shown in FIG. 6b. At this time, Bolster 1
The open end 32 of the ventilation passage 28 formed in the air supply pipe 2 aligns and contacts the opening of the air supply pipe 40 in an airtight manner. This state is detected by the limit switch 48, the on-off valve 44 is operated based on this detection signal, and a predetermined pressure air is supplied from the air source 46 to the air supply pipe 40. Lower mold 1
Exhaust is performed from the air blow nozzle 38 directed toward the edge of the cutter part 36 from the outside of the mold 16, and in particular, burrs and overflow of the product adhering to the cutter part 36 of the lower mold 16 are extremely effectively removed by the air blowing action. can be removed.

[Effect of idea]

As is clear from the above-mentioned embodiments, the lower mold air blowing device according to the present invention removes residual material of the die-cast product that adheres to the lower mold during trimming, such as burrs and overflow, when the mold is inverted. By blowing air from the outside of the mold along the edges of the cut portion, it is possible to reliably and efficiently remove the remaining material that tends to adhere to the cut portion.

In particular, the lower mold air blowing device of this embodiment is provided integrally with the bolster on which the lower mold is placed and fixed, and is constructed separately from the mold. If it is made of a flexible material or the like, it has many advantages, such as being adaptable when changing molds or deforming the cutter part, and also being able to be applied to existing molds.

In addition, the device of the present invention is configured so that the air supply system that performs air blowing is communicated only when the mold is reversed, so it prevents malfunctions such as air blowing to die cast products during the trimming press process. The effect of contributing to the safe design of fully automatic systems for manufacturing is extremely large.

In addition, the air supply system that performs air blowing is fixed and the space required for piping is significantly reduced, making it possible to prevent punctures in the middle of the pipe and eliminating the need for work and space for piping. , it has many advantages such as being able to downsize the entire equipment and reducing equipment costs.

Although the preferred embodiments of the present invention have been described above, it goes without saying that various improvements and changes can be made without departing from the spirit of the present invention.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing an embodiment of a trimming press machine to which the lower mold air blowing device according to the present invention is applied, FIG. 2 is a schematic plan view of the trimming press machine shown in FIG. 1, and FIG. FIG. 4 is a plan view of the essential parts of the bolster that constitutes the lower mold air blowing device according to the present invention, FIG. 4 is a cross-sectional view taken along the - line in FIG. 3, and FIG. 5 is the configuration of the air blowing device in the inverted state of the bolster shown in FIG. Main part cross-sectional side view showing arrangement, No. 6
Figures a and b are schematic explanatory diagrams of the reversing mechanism used in the present invention, each showing the reversing operation of the reversing mechanism. 10... Base, 12... Bolster, 14... Operation cylinder, 16... Lower mold, 18... Upper mold,
20... Operating cylinder, 22... Support shaft, 24...
Reversing mechanism, 26... Discharge chute, 28... Ventilation path, 30... Open end, 32... Open end, 34
... Air supply pipe, 36 ... Cut portion, 38 ... Air blow nozzle, 40 ... Air supply pipe, 42 ... External air supply pipe, 44 ... Opening/closing valve, 46 ... Air source, 4
8... Limit switch, 50... Support member, 5
2... Reversing platform, 54... Refraction support rod, 56...
...Operation cylinder, 58...Central bending section, 60...
Operating rod, 62... Operating rod, 64... Connecting portion.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A bolster is provided on the base, a lower mold is placed and fixed on the bolster, and the lower mold is movable forward and backward with respect to the press center, and the upper mold is placed above the press center. In a trimming press machine in which a mold is movable up and down and a reversing mechanism for the bolster is provided at the forward end of the bolster on the base, an air passage is bored in the bolster, and one end of this air passage is connected to the mold on the surface of the bolster. A plurality of air blow nozzles are opened outward from the mounting position, and a plurality of air blow nozzles are connected to the open end of this air passage through an air supply pipe and directed toward the edge of the cutter part of the lower mold, and the other end of the air passage is connected to the opening end of the air passage. 1. A lower mold air blowing device for a trimming press machine, characterized in that an air blowing device for a lower mold of a trimming press machine is provided in a part of the base, and an air supply pipe is provided in a part of the base, and the opening end is opened on the back side of the bolster, and the air supply pipe is aligned and abutted with the opening end when the bolster is reversed. (2) In the lower mold air blowing device for a trimming press machine described in claim 1 of the utility model registration claim, the lower mold attached to the surface of the bolster and the air blowing nozzle attached to the outside thereof are configured separately. Lower mold air blow device of trimming press machine.