JPH067919Y2 - Trimming device for synthetic resin moldings - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a trimming device for a synthetic resin molded product,
More specifically, the present invention relates to a trimming device for a synthetic resin molded product useful for trimming individual foam molded products from a sheet molded product in which a plurality of foam molded products are coupled.

<Prior Art and Background> Conventionally, as the above-described trimming device, there is known a type that conveys a sheet molded product to a trimming processing position where the setting position of the sheet molded product on the surface of the punching blade and the trimming processing position are different. Has been.

In such a trimming device, for example, since the recessed portion (protruding portion downward) of the sheet molded product is set in the recessed portion formed on the surface of the punching blade, the trimming device is set between the sheet molded product and the surface of the punching blade. The air may be trapped inside. In such a case, the sheet molded product may be lifted up by the pressure of the air that eliminates the escape area, and in particular, the vibration of the sheet molded product may cause the set state of the sheet molded product to be displaced. In this case, in the trimming process of the foam-molded product, a positional shift or a trimming failure (drilling shift) will occur.

In addition, when taking out individual molded products after the trimming process, each foamed molded product fits on the surface of the punching blade and is difficult to take out, and there is a problem that workability is not good.

Conventionally, there is provided a groove or hole provided on the side of the punching blade in order to escape the air trapped between the surface of the punching blade and the sheet molded product, but both of them wait for the air to flow out naturally. It is only for practical use and is not practical due to its responsiveness.

<Purpose of Invention> The present invention has been made in view of the above problems, and prevents slippage of a foamed molded product during trimming,
Moreover, it is an object of the present invention to provide a foaming molded product trimming device capable of improving the workability of the trimming process.

<Means for Solving Problems> A foaming molded product trimming device of the present invention for achieving the above object is a synthetic resin molded product that trims a sheet molded product set on the surface of a punching blade into a predetermined shape. In the trimming device of, in order to communicate the large number of air holes formed on the surface of the above-mentioned cutting blade and the large number of air holes with each other,
A communicating hole formed on the back surface of the punching blade, a cavity portion provided in the peripheral portion of the punching blade in a state of airtightly communicating with the communicating hole, and connected to the cavity portion. The air pressure control means for controlling the air pressure is controlled to reduce the air pressure in the vent hole before the trimming process to adsorb the sheet molded product, and after the trimming process, the air pressure in the vent hole is increased to allow the punched molded product to be removed from the cutting blade. It is configured as follows.

<Operation> According to the synthetic resin molded product trimming device having the above-described configuration, by driving the air pressure control means, the airtight cavity can be temporarily depressurized, and at the same time, the communication hole and the vent hole The air pressure can be reduced. Therefore, before trimming, if such a pressure reduction is performed with the sheet molded product set on the surface of the punching blade, the sheet molded product can be quickly and uniformly adsorbed on the surface of the punching blade.

On the other hand, by switching and driving the air pressure control means, compressed air can be added to the cavity, and at the same time, the compressed air can be ejected from the communication hole to the ventilation hole.
Therefore, if the compressed air is supplied while the foamed product is fitted on the surface of the cutting blade after being trimmed, the foamed product can be easily removed from the surface of the cutting blade by the blowing effect of the compressed air. be able to.

<Embodiment> An embodiment will be described in detail below with reference to the accompanying drawings.

In FIG. 1, a trimming device is an upper measuring panel (2) mounted above the device by a machine frame (not shown) and whose surface serves as a contact surface with a cutting blade, and a cylinder as a drive source by hydraulic pressure or the like. It has a base (3) that can be raised and lowered at (4). The base (3) has one end extending outwardly from the upper surface plate (2) to serve as a receiving portion (a) for the sheet molded product (P). A slide board (5) that can be moved by the transfer means is mounted.

In this case, the slide board (5) is the receiving part of the sheet molded product (P).
It is provided to reciprocate between one end of the base (3) which is (a) and directly below the upper surface plate (2) which is a trimming position, and such a slide plate (5) On the upper surface of the plate, there is attached a punching blade (6) formed in a substantially rectangular plate shape when seen in a plan view (see FIG. 2).

Therefore, as the punching blade (6), the sheet molded product (P) is set on the surface at one end of the base (3), and sent directly below the upper surface plate (2) to raise the base (3). Upper surface plate that rises and abuts
The trimming process of the sheet molded product (P) is performed in cooperation with (2).

Next, the characteristic components of the trimming device having the above configuration will be described in more detail.

In FIG. 2, the shape of the foam-molded product is adapted to fit each foam-molded product of the sheet-molded product (P) (see FIG. 1) to be set on the surface of the punching blade (6). A plurality of concave portions (7) are formed, and further, a convex portion (8) that relatively projects.
(See third) is formed as a shear blade. The recessed portions (7) formed on the punching blade (6) are arranged side by side in a vertical plane, four by four.

A vent hole (9) is formed in the bottom of each recess (7) and communicates with a communication hole (10) formed on the back surface of the punching blade (6). The communication holes (10) extend along one of the two sides of the punching blade (6) facing each other along the direction in which the recesses (7) are arranged side by side, for example, in a grid pattern. ing.

Next, as shown in FIG. 3, the frame member (11) is fixed to the four sides of the punching blade (6) while being joined to the side wall portion (6a) of the punching blade (6). ing. This frame member (11) is
The side wall portion (6a) and the slide board (5) are arranged around the extraction blade (6).
A cavity (12) is provided along the side for airtightly communicating with one end of the communication hole (10), and has an appropriate cross section L
It is formed in a letter shape.

Then, one end of an air pipe (13) connected to a known air pressure control means (not shown) is connected to a predetermined portion of the frame member (11) and is introduced into the hollow portion (12). Is provided. As a pneumatic control means, the cavity (12)
The air pressure is controlled to a predetermined pressure, and is equipped with a compressed air supply pump, a decompression pump, etc. which are appropriately incorporated in the control system.

With the above configuration, as shown in FIG. 1, the punching blade (6) is moved to the receiving part (a) of the sheet molding (P) of the trimming device, and the sheet molding (P) is placed on the surface thereof. When set, the air pressure control means is driven to drive the airtight cavity (1
Depressurize 2) at a time. As a result, as can be seen from FIG. 2, the air pressure applied from the communication hole (10) to the ventilation hole (9) can be simultaneously reduced. Therefore, in this case
Since the sheet molded product (P) is set on the surface of (6), individual foam molded products of the sheet molded product (P) can be easily and responsively fitted into the recessed portion (7) of the punching blade (6). In this state, it can be adsorbed, and even during the transportation toward the trimming position, the set deviation does not occur.

On the other hand, as can be seen from FIG. 1, the punching blade (6) with the sheet molded product (P) set is moved to just below the upper surface plate (2) which is the trimming position, and the base (3) is raised. When the sheet forming product (P) is trimmed by moving it upward and cooperating with the upper surface plate (2), the air pressure control means is switched to drive in the opposite direction, and the airtight cavity (12 ) To supply pressurized air to pressurize it at one time. As a result, as can be seen from FIG. 2, the air pressure at each location from the communication hole (10) to the ventilation hole (9) can be increased at the same time.
The compressed air can be jetted from (9). Therefore, in this case, after the trimming process, the foam molded product is
Even if it is tightly fitted in the recessed portion (7) of (6), the foam molding can be easily removed from the recessed portion (7) of the punching blade (6) by this compressed air.

In addition, in the above-described embodiment, the case has been described in which the cutting blade is applied to the type of trimming device that horizontally moves between the sheet receiving portion and the trimming processing position. However, in addition to this, it goes without saying that the extraction blade is also suitable for an apparatus of a type that moves up and down at a predetermined trihang position and performs a predetermined trimming process.

In addition, regarding the sheet molded product to be trimmed,
In addition to a foamable material, a non-foamable material is preferably selected.

<Effect of device> As described above, according to the foaming molded product trimming device of this device, the air pressure of the ventilation hole is reduced before the trimming process, so that the sheet molded product is promptly and uniformly applied to the surface of the cutting blade. Since it can be adsorbed in this state, it is possible to prevent the displacement of the foamed molded product in the trimming process without causing the set displacement of the sheet molded product.

Further, by increasing the air pressure of the ventilation hole after the trimming process, the foamed molded product can be easily removed from the surface of the punching blade, so that the workability in the trimming process can be improved, and other various effects are exhibited.

[Brief description of drawings]

FIG. 1 is a schematic view of a trimming device of the present invention, FIG. 2 is a schematic plan view showing an embodiment of a cutting blade of the trimming device of the present invention, and FIG. 3 is a sectional view taken along the line III-III shown in FIG. . (6) …… Punching blade, (9) …… Ventilation hole (10) …… Communication hole, (12) …… Cavity (P) …… Sheet molded product

Claims (1)

[Scope of utility model registration request] 1. A synthetic resin molded product trimming device for trimming a sheet molded product set on the surface of a cutting blade into a predetermined shape, wherein a large number of ventilation holes are formed on the surface of the cutting blade and a large number of these ventilation holes. To communicate with each other, a communication hole formed on the back surface of the punching blade, a cavity portion provided in the peripheral edge portion of the punching blade in a state of airtightly communicating with the communication hole, and a cavity connected to the cavity portion, And air pressure control means for controlling the air pressure of the part to a predetermined pressure, the air pressure of the vent hole is reduced before the trimming process to adsorb the sheet molded product, and the air pressure of the vent hole is increased after the trimming process for punching A trimming device for a synthetic resin molded product, characterized in that the product can be removed from the punching blade.