JPH078186Y2 - Trimming device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is used in the technical field of heat molding of synthetic resin materials and the like by a press machine, and more particularly to a trimming device for adjusting the shape of a molded product. .

(Prior Art) A press machine for laminating synthetic resin materials and other materials and performing heat molding usually has a trimming device consisting of a movable blade and a fixed blade, and this trimming device causes the protrusion to the outside of the laminated molded product. It is often used to remove burrs and the like.

(Problems to be solved by the invention) However, since the movable blade and the fixed blade provided in the conventional trimming device are respectively fixed to the movable die and the fixed die of the press machine, the movable blade and the fixed blade are expanded by the heat molding. The shearing function of the trimming device deteriorates due to abnormal shearing clearance between the mold and the fixed blade, and above all, the movable blade and fixed blade are fixedly installed around the entire upper and lower molds to control the heating temperature of each mold. When they are made different from each other, there is a problem that the deterioration tendency becomes remarkable and the precision of the outer shape processing of the molded product is lowered and the productivity is lowered.

In view of the above conventional problems, the present invention always maintains an appropriate shear clearance between the movable blade and the fixed blade even when the expansion degree of the upper die and the expansion degree of the lower die are not the same during the heat forming by the press machine. The present invention is to provide a trimming device.

(Means for Solving the Problems) The means for solving the above problems is to perform trimming for removing burrs and the like protruding from the outer periphery of a molded product at the time of hot molding by a press equipped with an upper die and a lower die. As a device, a fixed mold constituted by one of the upper mold and the lower mold, a movable mold constituted by the other of the upper mold and the lower mold and moving up and down with respect to the fixed mold, and a molding surface of the fixed mold. A fixed blade fixedly provided on the outer peripheral edge of the movable die, and a movable blade that is integrally movable with the movable die around the molding surface of the movable die and fixed to the movable die. It is provided so as to be able to advance and retreat in a direction orthogonal to the vertical direction of movement of the movable mold between the advanced shear position and the outward retract position so that a proper shear clearance with the blade can be obtained, and is positioned at the retract position by a spring. Urged to Movable blade,
The movable blade is fixedly provided outside the periphery of the fixed die so as to face the movable blades, and when the movable die is clamped with respect to the fixed die, the movable blade slides into contact with the movable blade to retract the movable blade. A movable blade guide having a cam surface inwardly inclined with respect to the mold clamping movement direction of the movable mold so as to move forward from the position against the biasing force of the spring and to be positioned at the shearing position during mold clamping. And

(Operation) As a result, in the present invention, even if the heating temperatures of the upper die and the lower die are different from each other, the movable blade can be properly sheared by the movable blade guide when the die is clamped. By being guided to the position, the movable blade always forms an appropriate shear clearance with respect to the fixed blade during mold clamping, so that burrs and the like protruding on the outer periphery of the molded product can be easily and accurately removed.

(Embodiment) An embodiment of the present invention will be described below in detail with reference to the drawings.

The upper mold 1 and the lower mold 2 shown in FIGS. 1 to 3 are attached to a press machine (not shown), and, for example, heat molding of a molded product W such as a rear package for partitioning an automobile compartment and a trunk room. Applied to processing.

The upper mold 1 includes an upper mold base 3, an upper mold body 4 having a molding surface, a lifting guide 5, a hanging bolt 6, a vertical compression spring 7, a heat insulating member 8 and an intermediate block 9, and is a movable mold. I am configuring.

The upper mold base 3 is attached to a pressing machine (not shown) by an appropriate means, and a pressurizing means (not shown) such as a cylinder device is connected to the upper surface thereof, and the upper mold body 4 is provided with a plurality of members. The suspension bolts 6 and a plurality of the above-mentioned raising and lowering guides 5 in which the guide pins 5a are loosely fitted in the bushes 5b are suspended so that they can be raised and lowered, and between the upper mold body 4 and the upper mold base 3. It is urged downward by the plurality of vertical compression springs 7 interposed in the vertical direction.

The intermediate block 9 is provided to prevent the heat insulating member 8 mounted on the upper surface of the upper mold body 4 from being crushed when the upper mold 1 is finally pressed. It is provided.

The lower mold 2 includes a lower mold base 10 and a lower mold body having a molding surface.
11 and a heat insulating member 12 interposed between the two, to form a fixed mold. The lower mold base 10 is attached to a pressing machine (not shown) by appropriate means, and the trimming device 13 of the present invention is provided on the upper mold 1 and the lower mold 2 described above.

That is, in the upper die 1, the movable blades 14 arranged outside the entire circumference of the upper die body 4 are advanced to the upper die body 4 so as to appropriately take shear clearance with a fixed blade 15 described later. It is provided so as to be able to advance and retreat in the lateral direction orthogonal to the ascending / descending direction between the position and the retracted position that is retracted outward. On the other hand, in the lower mold 2, a fixed blade 15 forming a part of the cavity C is fixedly provided on the outer peripheral edge of the lower mold body 11, and the fixed blade 15 has A movable blade guide 16 is provided to allow the movable blade 14 to face a shearing position P (see FIGS. 3 and 4) with the fixed blade 15 when the upper die 1 and the lower die 2 are clamped.

The movable blade 14 is mainly composed of a movable blade body 17, a movable blade holder 18, a movable blade retracting means 19 and a stopper 20.

The holders 18 are arranged in six places so as to hold the movable blade body 17 outside the upper die body 4, and the fitting portions 18a at the upper ends thereof are formed on the upper die base plate 3. The support portion 3a is provided slidably with a dovetail-fitting structure, for example. The movable blade main body 17 is divided into three members in FIG. 5, but the number can be increased or decreased if necessary.

The retracting means 19 retracts the holder 18 together with the movable blade body 17 to the outside of the upper die body 4 when the upper die 1 is separated from the lower die 2, and is formed at the upper end of the holder 18. And a spring seat 3b formed on the upper mold base 3 and a lateral compression spring 21 interposed therebetween.
And the retracted position of the holder 18 is the stopper.
It is regulated by 20.

The movable blade guide 16 is for exposing the movable blade main body 17 of the movable blade 14 to the shearing position P with the fixed blade 15 when the upper die 1 and the lower die 2 are clamped. A plurality of (six in this embodiment) dispersedly arranged in a part, and a guide shoe 22 is provided at the upper end of each movable blade guide 16 with a fixed blade 15.
It is installed toward the side. Then, as shown in FIG. 6, the holder 18 is moved to the retracted position (6th
Just before the upper die 1 and the lower die 2 are about to be clamped, the cam surface 18c of the holder 18 is guided by the guide shoe 2
The upper die body 4 (that is, the fixed blade 1) is brought into sliding contact with the second cam surface 22a.
The movable blade main body 17 approaches the fixed blade 15 by advancing toward 5) and is configured to maintain an appropriate shear clearance at the shear position P. The movable blade guide 16 may be replaced by the fixed blade 15 in place of the fixed structure of this embodiment, if necessary.
It is also possible to adjustably set the relative distance between the above and the above and to facilitate the setting of the shear clearance.

The fixed blade 15 is provided by being divided into eight members (see FIG. 2), but if necessary, it may be formed into one piece or divided into nine or more pieces.

Each of the upper mold body 4 and the lower mold body 11 has a built-in heating means (not shown) for heating to a desired mold temperature. In the upper die 1, even if the expansion action during heating is propagated from the upper die body 4 to the holder 18 via the upper die base 3, the movable blade body 17 is separated from the upper die body 4 so that no trouble occurs. Absent. Further, in the lower die 2, since the distance between the lower die body 11 and the movable blade guide 16 is relatively wide, the expansion action of the lower die body 11 hardly affects the movable blade guide 16.

The movable blade 14 and the fixed blade 15 may be configured by providing the upper die 1 with the fixed blade 15 and the lower die 2 with the movable blade 14 instead of the present embodiment.

Next, the operation of the above embodiment will be described.

In the molding process of the above-mentioned molded article W, a base material molding step and a non-woven fabric sticking step are sequentially carried out, and the heating temperature of the upper mold body 4 is set to 200 ° C. in the base material molding step and 120 to 150 ° C. in the non-woven fabric sticking step. Then, the heating temperature of the lower mold body 11 is adjusted to a temperature suitable for each material to be handled. The trimming process of the molded product W by the trimming device 13 is performed in each of the above processes, and the molded product W in the non-woven fabric bonding process will be described.

The base material and the non-woven fabric for the back surface are previously spray-coated with an adhesive, the non-woven fabric for the back surface and the base material are sequentially set in the cavity C of the lower mold 2, and the non-woven fabric for the back surface is provided on the upper surface thereof. Similarly, a non-woven fabric for the surface to which the adhesive is spray applied is set.

Next, the upper mold 1 is lowered and heated while being pressed, and the upper mold 1 is lowered until the vertical compression spring 21 contracts and the intermediate block 9 presses the upper mold body 4. The cam surface 18c of the holder 18 is the guide shoe 2
The movable blade body 17 forms a shear clearance of, for example, 1/100 mm at the shearing position P with the fixed blade 15 by slidingly contacting the second cam surface 22a, and the molded product W has burrs and the like protruding from the outer periphery thereof removed together with the nonwoven fabric. The outer shape is adjusted.

(Effect of the Invention) According to the trimming device of the present invention, the movable blade is provided so as to be capable of moving forward and backward with respect to the mold body, and the movable blade slides on the movable blade guide when the upper mold and the lower mold are clamped. Since a proper shear clearance can always be formed at the shear position with the fixed blade guided, even if the heating temperature of the upper mold and the lower mold are different from each other and the expansion action is not the same, the shearing property is not deteriorated. Therefore, there is an effect that the processing accuracy and the productivity of the molded product are significantly improved.

[Brief description of drawings]

The drawings illustrate an embodiment of the present invention. Fig. 1 is a bottom view of an upper mold, Fig. 2 is a plan view of a lower mold, and Fig. 3 is Figs.
A central vertical sectional view taken along the line III-III in the figure, FIG. 4 is a vertical sectional view taken along the line IV-IV in FIGS. 1 and 2, and FIG. 5 is a bottom view of the movable blade in FIG. 4, and FIG. FIG. 6 is an enlarged view showing a VI portion of FIG. 4. 1 ... Upper mold, 2 ... Lower mold, 4 ... Upper mold body, 14 ... Movable blade, 15 ...
Fixed blade, 16 ... Movable blade guide, 21 ... Lateral compression spring, 22a ... Cam surface, P ... Shear position, W ... Molded product.

Claims (1)

[Scope of utility model registration request] 1. A trimming device for removing burrs and the like protruding from the outer periphery of a molded product during heat molding by a press equipped with an upper mold and a lower mold, the trimming device comprising one of the upper mold and the lower mold. A fixed die, a movable die configured by the other of the upper die and the lower die, which moves up and down with respect to the fixed die, and a fixed blade fixedly provided on an outer peripheral edge portion of a molding surface of the fixed die, A shearing position is provided outside the periphery of the molding surface of the movable die so as to be able to move up and down integrally with the movable die, and is advanced so as to appropriately take a shear clearance with the fixed blade with respect to the movable die. A movable blade, which is provided so as to be able to move forward and backward in a direction orthogonal to the ascending / descending direction of the movable die between the retracted position that has retreated outward, and is biased by a spring so as to be positioned at the retracted position, and outside the periphery of the fixed die. To each of the above movable blades And is fixedly provided, and when the movable die is clamped with respect to the fixed die, the movable blade slides into contact with the movable blade to move forward from the retracted position against the biasing force of the spring. A trimming device comprising: a movable blade guide having a cam surface that is inwardly inclined with respect to the mold clamping movement direction of the movable mold so as to be positioned at the shearing position during mold clamping.