JP3220395B2 - Mold press molding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold press molding apparatus for molding interior materials for automobiles and the like, and more particularly, to a method in which upper and lower molds for mold press molding have large irregularities. The present invention relates to a mold press forming apparatus that requires deep drawing of a material.

[0002]

2. Description of the Related Art Conventionally, as a molding apparatus of this kind, FIG.
The following is used. That is, this molding apparatus mold has a pair of upper and lower molds 1 and 2, and mold surfaces 3 and 4 each having an uneven surface are formed. Upper mold 1
The mold surface 3 has a convex portion 6 which protrudes greatly in the direction of the lower mold 2 from the parting line 5 of a molded product such as an interior material, and the mold surface of the lower mold 2 is correspondingly formed. 4 has a concave portion 7 which is greatly depressed, and a cavity is formed by these mold surfaces 3 and 4.

A plurality of guide posts 8 projecting in the direction of the lower mold 2 are provided on an outer peripheral portion of the upper mold 1, and the guide posts 8 are respectively slidable up and down. The skin frame support 9 is contracted between the upper frame 1 and the skin frame support 9 and is constantly urged in the lower mold 2 direction by a spring 14. A skin set frame 11 for setting a skin material 10 is provided on the inner peripheral side wall of the skin frame support base 9.
The skin set frame 11 has an L-shaped cross section, and a set pin 12 is protruded in the lower mold 2 direction.

In the above configuration, when a molded article such as an interior material is molded, a skin material 10 of the molded article is pierced into a set pin 12 and set in the upper mold 1 as shown in FIG. Next, the upper mold 1 is lowered in the direction of the lower mold 2, a cavity is formed by the mold surfaces 3 and 4, the upper mold 1 is temporarily stopped, and a supply (not shown) provided in the lower mold 2 is provided. The molten resin is supplied from the device into the cavity,
As shown in FIG. 7, the upper mold 1 is further lowered to close the mold, thereby forming a molded product.

Accordingly, since the mold surface 3 of the upper mold 1 has the convex portion 6 which protrudes greatly in the direction of the lower mold 2 from the parting line 5 of a molded article such as an interior material, the surface material 10 is formed. When set on the skin set frame 11, the skin material 10
Is set on the lower mold 2 side by the step H from the parting line 5.
It is necessary for the skin material 10 to unfold greatly by the step H,
For this reason, after molding of the skin material 10, there is a possibility that a grain flow or skin breakage may occur.

Therefore, in order to prevent the occurrence of the grain flow or the cutting, the skin frame support base 9 for supporting the skin set frame 11 is provided.
Is movable with respect to the guide post 8, and the spring 1
4, the skin frame support base 9 is normally urged in the lower mold 2 direction. When the skin material 10 is set, the spring 14 resists compression so that the skin material 10 pierces the set pin 12. Had become.

Then, the upper and lower molds 1 and 2 start clamping,
After the suspension, the resin is supplied, and as the mold further proceeds, the skin set frame 11 is pulled by the skin material 10 and guided by the guide post 8 to rise in the direction of the upper mold 1, so that the skin material 10 is raised. Was trying to reduce the deployment rate.

[0008]

However, when the skin material 10 is stabbed into the set pins 12 and set on the skin frame set 11, the spring 14 functions to stab the skin material 10 against the set pins against compression. Therefore, the spring force of the spring 14 requires a predetermined strength. vice versa,
If this spring force is too large, the skin material 10 does not slide sufficiently into the upper and lower molds 1 and 2 during mold clamping,
For this reason, it becomes a cause of generation of a grain flow or a cut.

Further, even when the spring force of the spring 14 is reduced to the limit, the clearance between the mounting surface of the guide post 8 in the upper mold 1 and the skin frame set 11 is up to the most contracted dimension A of the spring (see FIG. 7), the skin frame set 11 cannot be further raised to the upper mold 1 side, and the deployment rate of the skin material 10 is increased.

Furthermore, the spring 14 requires a large force to contract as it contracts. Further, as the closing of the upper and lower dies 1 and 2 proceeds, the retraction amount (force) of the skin material 10 also increases, so that the repulsive force of the spring 14 and the retraction force of the skin material 10 gradually increase. Also, the surface material 10 is liable to cause the grain flow or the cut.

In view of such circumstances, the present invention makes it possible to use a skin material on a skin frame without using a spring and to reduce the deployment rate of the skin material during mold clamping. It is an object of the present invention to provide a mold press forming apparatus.

[0012]

According to the present invention, there is provided a mold press molding apparatus comprising: a plurality of guide posts protruding in a lower mold direction on an outer peripheral portion of an upper mold; A skin frame support is provided on each of the guide posts so as to be vertically slidable, a skin set frame for setting the skin material is mounted on the skin frame support, and the upper and lower molds of the display frame support are mounted. A stopper is provided in the upper mold to have a stopper for preventing upward sliding when opened, and to detect when the upper and lower molds are clamped and to release the stopper from being prevented from sliding. On the load rod or guide post.

Accordingly, when the skin material is set on the skin set frame when the upper and lower dies are opened, the stopper set prevents the skin set frame from sliding upward in the guide post and stops. Skin material can be set.

On the other hand, when the upper and lower dies are clamped, the stopper slidable state is released by the stopper operating means, and the skin frame set is guided slidably with respect to the guide post, so that the skin material is fixed. The deployment rate has been reduced.

[0015]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing a part of an embodiment of the present invention, wherein 21 is an upper die, 22 is a lower die, and an upper die 2 is shown.
1 is supported by a movable bolster (not shown) so as to be vertically movable, and the lower mold 22 is supported by a fixed bolster 41. A lower mold 22 is provided on a mold surface 23 of an upper mold 21 from a parting line 25 of a molded product 20 such as an interior material.
The lower mold 22 has a correspondingly shaped concave portion 27 formed on the mold surface 24, and the mold surface 23 has a cavity. Is formed.

A plurality of guide posts 28 projecting in the direction of the lower mold 22 are provided on the outer periphery of the upper mold 21, and the guide posts 28 are respectively slidable up and down.
Is provided, and the skin frame support base 29 is prevented from falling off by a flange portion 28 a provided at the tip of the guide post 28. A skin set frame 31 having an L-shaped cross section for setting the skin material 30 is mounted on the inner peripheral wall of the skin frame support base 29. A set pin 32 for setting the skin material 30 to the upper mold 21 is mounted on the skin set frame 31 so as to protrude toward the lower mold 22.

Reference numeral 35 denotes a cylinder device provided on the upper mold 21 via a rod 42. This cylinder device 3
5 is engaged with the upper wall portion 29a of the skin frame support base 29,
A stopper 36 for preventing the skin frame support base 29 from sliding upward when the upper and lower molds 21 and 22 are opened is provided so as to be able to enter and exit, and the lower position of the upper mold 21 with respect to the lower mold is set. The upper die position detecting means 37, such as a limit switch, detects the position and sends it to a control unit (not shown) based on the detection result. The circuit opening / closing valve 39 is opened, and the air pump 38 is operated.
By sending air pressure to the cylinder device 35, the stopper 36
Is retracted to disengage with the upper wall 29a of the skin frame support base 29 so that the skin frame support base 29 is slidable with respect to the guide post 28. A stopper operating device is constituted by the position detecting means 37, the air pump 38, the circuit opening / closing valve 39, and the like.

When a molded article such as an interior material is molded by the above configuration, first, the upper and lower dies 2 shown in FIG.
With the molds 1 and 22 open, the skin material 30 of the molded product
Is pierced into the set pin 32 and set on the upper mold 21. In this case, the stopper 36 is engaged with the upper wall portion 29a of the skin frame support base 29 to prevent the skin frame support base 29 from sliding toward the upper die 21 with respect to the guide post 28. Therefore, the skin material 30 can be easily pierced into the set pins 32 and set on the skin set frame 31.

Next, the upper die 1 is lowered in the direction of the lower die 22, and the upper and lower dies 21, 22 are clamped to form a molded product 20. In this case, First, a cavity is formed by the mold surfaces 23 and 24, and thereafter, the upper mold 21 is temporarily stopped, and molten resin is supplied into the cavity from a supply device (not shown) provided in the lower mold 22, and FIG. As shown in (1), the upper mold 21 is further lowered to perform mold clamping, and a molded article 20 is formed by laminating the skin material 30 on a base material 33 formed of a molten resin.

In this mold clamping step, when the upper mold position detecting means 37 detects the lowered position of the upper mold 21 to a predetermined position, the control device opens the circuit opening / closing valve 39 and the air pump 38 controls the cylinder device 35. Supply air pressure to
The engagement of the stopper 36 with the skin frame support base 29 is released. As a result, as the mold clamping further progresses, the skin set frame 31 is pulled by the skin material 30 and guided by the guide post 28, rises in the direction of the upper mold 21, and rises in the direction of the skin material 30.
Will be reduced.

According to the above-described embodiment, the stopper 3 is used when the mold is opened without using a conventional spring.
6, the skin frame support base 29 is fixed to the guide post 28, so that the skin material 30 can be set on the skin set frame 31, and the stopper 36 is engaged with the skin frame support base 29 in the mold clamping process. By solving the problem, the skin frame support base 29 can be slid with respect to the guide post 28, and the deployment rate of the skin material 30 can be reduced. It is possible to prevent the occurrence of the grain flow or the breakage in the forming process of the material 30.

Further, in order not to use a spring, as the mold clamping of the upper and lower molds 21 and 22 progresses, the skin material 30 is increased.
The amount (force) of pulling in of the skin material 30 does not increase, and it is possible to prevent the occurrence of the grain flow or cut of the skin material 30 due to this.

FIGS. 3 and 4 show another embodiment according to the present invention. Compared with the above embodiment, a cylinder frame 35 is provided on a guide post 28 so as to be slidable on a skin frame support. It is installed on the base 29, and is operated by a stopper 36 and a cylinder device 35, and the stopper 36 is penetrated through the guide post 28 to fix the skin frame support base 29. With the configuration, the rod bar 42 used in the above-described embodiment is abolished, the size of the mold is reduced, and the cost of mold production and the number of man-hours for molding are reduced.

[0025]

As described above, in the present invention, the upward sliding of the display frame support is prevented by the stopper when the mold is opened without using the conventional spring. Then, it is possible to set the skin material on the skin set frame, and in the mold clamping process, when this mold clamping is detected, the stopper slidable state is released by the stopper operation means, and the guide post is covered with the skin. Since the frame support is configured to be slidable, it is possible to reduce the deployment rate of the skin material, eliminate the problem caused by the magnitude of the spring force of the conventional spring, and reduce the size of the skin material 30 in the molding process. It is possible to prevent the occurrence of grain flow and cutting.

Further, since the spring is not used, the amount of pulling-in (force) of the skin material does not increase as the upper and lower molds are tightened. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a main part in a mold opening process according to an embodiment of the present invention.

FIG. 2 is also a cross-sectional view at the time of mold clamping.

FIG. 3 is a cross-sectional view showing a main part in a mold opening process according to another embodiment of the present invention.

FIG. 4 is also a cross-sectional view at the time of mold clamping.

FIG. 5 is a sectional view of a conventional press molding apparatus.

FIG. 6 is a cross-sectional view of a main part showing the mold open state of FIG. 5;

FIG. 7 is a cross-sectional view of a main part showing a mold clamping state of FIG. 5;

[Explanation of symbols]

 Reference Signs List 20 Molded product 21 Upper mold 22 Lower mold 28 Guide post 29 Skin frame support 30 Skin material 32 Set pin 33 Base material 35 Cylinder device 37 Position detecting means 38 Air pump 40 Stopper operating device 42 Rod rod

──────────────────────────────────────────────────の Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B29C 43/18-43/20 B29C 43/32-43/42 B29C 33/12-33/18 B29C 51 / 04-51/16 B29C 51/26-51/38

Claims (2)

(57) [Claims] 1. After setting a skin material on the upper mold side of the upper and lower molds for mold press molding, the upper and lower molds are clamped, and the molten resin supplied from the lower mold side is used. In a mold press molding apparatus configured to form a base material, laminating the base material and the skin material, and forming a molded product, the outer peripheral portion of the upper mold protrudes in the lower mold direction. A plurality of guide posts are provided, a skin frame support is provided on each of the guide posts so as to be vertically slidable, a skin set frame for setting the skin material is mounted on the skin frame support, and the display frame support is A stopper operation that has a stopper that prevents upward sliding when the upper and lower molds are opened, and that detects when the upper and lower molds are clamped to release the sliding inhibition state of the stopper. Means is provided on the upper mold via a rod bar. Mold press molding equipment. 2. After setting a skin material on the upper mold side of the upper and lower molds for mold press molding, the upper and lower molds are clamped, and the molten resin supplied from the lower mold side is used. In a mold press molding apparatus configured to form a base material, laminating the base material and the skin material, and forming a molded product, the outer peripheral portion of the upper mold protrudes in the lower mold direction. A plurality of guide posts are provided, a skin frame support is provided on each of the guide posts so as to be vertically slidable, a skin set frame for setting the skin material is mounted on the skin frame support, and the display frame support is A stopper operation that has a stopper that prevents upward sliding when the upper and lower molds are opened, and that detects when the upper and lower molds are clamped to release the sliding inhibition state of the stopper. Means provided on the guide post. Mold press forming equipment.