JP2938516B2 - Molding molding method and apparatus - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding method and an apparatus for molding an end of a molding material to be extruded during the extrusion. is there.

In the following description, "molding"
Each term "molding material" is used separately.
"Molding" refers to an intermediate material that has undergone various processes such as terminal molding or a completed product, and "Molding material" refers to a state in the middle of being continuously extruded from a molding die. .

[Conventional technology]

The conventional molding method is to continuously mold a molding material having a constant cross-sectional shape by extrusion, then cut this long molding material to a predetermined size, and then further cut both ends of the molding material cut to a predetermined size. The part was molded through a process of molding an end cap by injection molding.

However, in this molding method, a joining line is formed between the extruded part and the injection molded part in the molding, and it is difficult to make the color, texture, etc. of both molded parts exactly the same. Looks worse. In addition, since the injection molding process becomes indispensable, equipment costs for molding machines and molds for that, and extra man-hours are required,
There is also a problem that the cost is high.

[Problems to be solved by the invention]

An object of the present invention is to form a molding by performing cutting of a molding material and terminal molding during extrusion molding.

[Means for solving the problem]

Means adopted by the present invention in order to solve the above-mentioned problems,
A shutter is disposed so as to be able to advance and retreat with respect to the extrusion opening of the molding die for continuously extruding the molding material, and during continuous extrusion of the molding material, the advance of the shutter causes the extrusion opening to be moved by the shutter. By closing the extrusion opening while the extrusion opening is closed by the shutter, the material dough is discharged from the dough discharge hole provided in the shutter to the outside, thereby forming the terminal of the molding material, thereby forming the molding material terminal. Cutting wood.

[Function of the invention]

Since the terminal forming and cutting of the molding material are performed during the extrusion molding, the molding can be formed.
As a result, in the surface of the molded product, the color tone, texture, and the like of the main body portion of the molding and the terminal portion are the same, and the appearance is improved. Further, in terms of the molding method and the apparatus, various facilities and man-hours such as an injection molding machine and a mold for terminal molding are not required, and the molding cost is reduced.

Further, when the extrusion opening of the forming die is closed periodically by moving the shutter forward and backward, both ends of the molding material can be cut and formed. Also, when the reciprocating direction of the shutter with respect to the extrusion opening of the molding die is set to the width direction of the molding material continuously extruded from the molding die, the end of the molding material is cut into a shape inclined with respect to the longitudinal direction. Can be molded.

Further, a first shutter that advances and retreats in a direction perpendicular to both the extrusion direction of the molding material continuously extruded from the extrusion opening of the molding die and the width direction thereof, and the width of the same molding material. Using two types of shutters, a second shutter that moves back and forth along the direction,
By activating the first and second shutters alternately, both ends of the molding material can be cut and formed into different shapes.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to examples.

Molding Ma attached to the side of the car 1
A molding apparatus according to a first embodiment of the present invention for molding (see FIG. 1) is shown in FIGS.

The forming die 2 is formed with an extrusion opening 3 corresponding to the cross-sectional shape of the molding Ma.
A shutter 4 is mounted on the front end face of the sheet material so as to be movable in a direction perpendicular to the plate surface of a plate-shaped molding material Ma 'continuously extruded from the extrusion opening 3. That is,
The shutter 4 is guided by a pair of shutter guides 5 attached to the front end face of the forming die 2, and a male screw shaft 7 serving as a rotation shaft of a motor 6 and a female screw member 8 attached to the shutter 4 are screwed together. The forward / backward rotation of the motor 6 causes the shutter 4 to advance and retreat (to advance and retreat) with respect to the extrusion opening 3 along the above-described direction.

As shown in FIGS. 4 and 5, a material discharge hole 9 is provided at the lower end of the shutter 4 so that the shutter 4 advances and the extrusion opening 3 of the forming die 2 is moved.
Is closed (see FIG. 4), the extrusion opening 3 of the molding die 2 and the cloth discharge hole 9 of the shutter 4 are connected via a communication passage 11 provided in the shutter 4. ing.

In FIG. 2, a take-off device 12 for picking up a molding material Ma 'continuously extruded from the extrusion opening 3 of the forming die 2 is connected to the forming die 2 and provided horizontally. . The take-off device 12 is a molding material Ma '
In the middle of the take-off device 12, a cooling device 13 for cooling the molding Ma cut to a predetermined length is provided. The take-up speed of the take-off device 12, the rotational speed of the motor 6 for driving the shutter 4, and the drive timing thereof are all controlled by the control device 14.
Is controlled by

Then, as shown in FIGS. 2 and 3, the shutter 4 is retracted with respect to the extrusion opening 3, and
When the extrusion opening 3 is fully opened, the molding material Ma 'is continuously extruded from the extrusion opening 3, and
The molding material Ma 'is taken up at a constant speed by a take-up device 12 arranged near the extrusion opening 3. When the molding material Ma 'is extruded for a predetermined length, the shutter 4 moves forward by the activation of the motor 6, and the extrusion opening 3 is opened.
Is closed (see FIG. 4).

As a result, the molding material Ma 'is cut by the tip of the shutter 4 while forming the end of the molding material Ma'. While the extrusion opening 3 is closed by the shutter 4, the raw material dough 15 is continuously extruded. However, the extrusion opening 3 and the dough discharge hole 9 of the shutter 4 are connected to the shutter 4. Provided communication passage
The raw dough 15 is discharged through the dough discharge holes 9 because they are communicated with each other. For this reason, the next molding can be performed without hindrance without increasing the pressure of the raw material material inside the molding die 2.

The shutter 4 that has cut off the molding material Ma ′ and closes the extrusion opening 3 is retracted by the activation of the motor 6 after a predetermined time has elapsed, and the next molding is started. When the shutter 4 moves backward, one terminal of another succeeding molding material Ma 'is formed.

FIG. 6 is a plan view of the molding Ma formed by the above-described forming method. The length (L) of the molding Ma is freely controlled by the timing of the movement of the shutter 4 and the speed of the take-off device 12. At the same time, the terminal shape is determined by the shape of the tip of the shutter 4 and the moving speed of the shutter 4. As described above, when the shutter 4 is moved forward and backward with respect to the extrusion opening 3 of the molding die 2 and the extrusion opening 3 is periodically closed, the molding Ma having a predetermined length in which the both ends 16 are formed at the time of cutting.
Is extruded.

7 to 12 show another embodiment of the present invention. In this embodiment, one terminal of the molding can be formed obliquely.

As shown in FIG. 7, the molding apparatus according to the present embodiment includes a first shutter 4a which advances and retreats in a direction perpendicular to the plate surface of the molding material being extruded, and a direction orthogonal to the first shutter 4a. And a second shutter 4b that moves back and forth along the width direction). At the tip of the second shutter 4b, a molding recess 10 corresponding to the shape of the front end of the extrusion opening 3 provided at the molding die 2 (the end facing the second shutter 4b). Is provided. The configuration of the other parts of the first and second shutters 4a and 4b, and the mechanism for driving them are as follows.
Since it is completely the same as the device of the first embodiment, in each figure, the same parts as those used in the first embodiment are denoted by the same reference numerals with suffixes “a” and “b”, and the same parts are used. It is displayed and detailed description is omitted.

Next, one cycle of the molding method of the second embodiment will be described with reference to FIG. 11 and FIG. In addition, in FIG. 11, P indicates the extrusion direction of the molding material,
In FIG. 12, solid lines and broken lines indicate the states of movement of the first shutter 4a and the second shutter 4b, respectively.

When the first shutter 4a is completely closed by the first shutter 4a (see FIG. 8), the first shutter 4a is moved backward at a predetermined speed to open the closed opening 3 for extrusion. The "X" part, which is one terminal of the molding Mb, is formed (see FIG. 11). This first
Shutter 4a has been retracted to a position where it does not interfere when the second shutter 4b advances.

Also, molding is performed with the extrusion opening 3 fully opened.
After the "Y" part of Mb is molded, the second shutter
When the pusher 4b is advanced at a predetermined speed, as shown in FIG.
Is gradually closed. Then, as shown in FIG. 10, when all of the extrusion openings 3 are closed by the second shutter 4b, the molding Mb is cut into a shape inclined with respect to its longitudinal direction, and The “Z” portion, which is the terminal portion, is formed (see FIG. 11).

As described above, when the second shutter 4b is used, one terminal 16 of the molding Mb can be formed into a shape inclined with respect to the longitudinal direction.

〔The invention's effect〕

According to the molding method of the present invention, it is possible to perform molding and cutting of the end of the molding material during extrusion molding, so that molding is performed without performing injection molding as in the conventional molding method. It becomes possible. As a result, in the surface of the molded product, the color and texture of the main body portion of the molding and the terminal portion are the same, the appearance is improved, and in the aspect of the molding method and apparatus, the molding is performed for the terminal molding. Injection molding machines, molds, and other equipment and the man-hours (labor) required for the equipment are not required, and the molding cost is significantly reduced.

A first shutter that advances and retreats in a direction perpendicular to both the extrusion direction of the molding material continuously extruded from the extrusion opening of the forming die and the width direction thereof, and a width of the same molding material. When two types of shutters are used, with the second shutter moving forward and backward along the direction, and the first and second shutters are alternately operated, one end of the molding is inclined with respect to its longitudinal direction. Both ends of the molding can be formed into different shapes, for example, by cutting into shapes.

Further, by changing the shape, the moving speed, and the moving timing of the tip portion of the shutter, various moldings having different lengths and terminal moldings can be easily formed.

[Brief description of the drawings]

FIG. 1 is a side view of an automobile 1 equipped with a molding Ma, FIG. 2 is an overall side view of a molding apparatus according to the present invention, and FIGS. 5, FIG. 5 is a sectional view taken along line AA of FIG. 4, FIG. 6 is a plan view of a molded molding Ma, and FIG. 7 is another molding according to the present invention. FIGS. 8 to 10 are partial front views of the molding die 2 showing a state of movement of the first and second shutters 4a and 4b, and FIG. FIG. 12 is a plan view of a molding Mb in which a terminal is formed obliquely, and FIG. 12 is a view showing a state of movement of first and second shutters 4a and 4b. The description of the reference numerals of the main parts constituting the present invention is as follows. Ma, Mb: molding Ma ': molding material 2: molding die, 3: extrusion opening 4: shutter, 4a: first shutter 4b: second shutter, 9: fabric discharge hole 15: raw material fabric, 16: molding Terminal

Claims (7)

(57) [Claims] 1. A shutter is disposed so as to be able to advance and retreat to an extrusion opening of a molding die for continuously extruding a molding material. By closing the opening with the shutter and discharging the raw dough to the outside through the dough discharge hole provided in the shutter while the extrusion opening is closed by the shutter, the end of the molding material is formed. And molding the molding material while cutting the molding material. 2. The molding method according to claim 1, wherein the extrusion opening of the molding die is periodically closed by moving the shutter forward and backward, and both ends of the molding material are cut and molded. 3. The extrusion direction of a molding material continuously extruded from an extrusion opening of a molding die,
2. The molding method according to claim 1, wherein the molding material is moved back and forth along a direction orthogonal to both the width direction and the end of the molding material by cutting along the width direction. 3. 4. The shutter moves forward and backward along a width direction of a molding material continuously extruded from an extrusion opening of a molding die, and a terminal of the molding material is formed into a shape inclined with respect to its longitudinal direction. The molding method according to claim 1, wherein the molding is performed by cutting. 5. A first shutter which advances and retreats in a direction orthogonal to both the extrusion direction of a molding material continuously extruded from an extrusion opening of a molding die and the width direction thereof, and a similar molding. Using two types of shutters, a second shutter that advances and retreats along the width direction of the material, and alternately operates the first and second shutters to cut and form both ends of the molding material into different shapes. A molding method for molding. 6. A molding die provided with an extrusion opening, and a shutter provided with a dough discharge hole, wherein the shutter can close the extrusion opening at a front end surface of the molding die. And a molding device which is mounted so as to be able to advance and retreat with respect to the opening. 7. A molding die provided with an extrusion opening, and first and second shutters provided with a dough discharge hole, wherein the first shutter is provided on a front end face of the molding die. The extrusion opening of the molding material continuously extruded from the extrusion opening so as to be able to close the extrusion opening, and is mounted so as to be able to advance and retreat along a direction orthogonal to both of the width direction of the molding material, The molding device of claim 2, wherein the shutter (2) is mounted on the front end surface of the molding die so as to be able to close an extrusion opening so as to advance and retreat along the width direction of the molding material.