JPH0438972Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a press device for stampable molding of thermoplastic resin.

(Prior art) As a press molding device for this type of resin,
No. 13927 and others have been disclosed, and conventionally, in stampable molding of this type of resin, a single molded product is formed.

(Problems to be Solved by the Invention) When attempting to mold two or more molded products in one mold closing and molding operation using a conventional press device, the following problems occur.

In other words, in the case of thermoplastic resins, the temperature decreases during press molding, causing thermal contraction, and therefore the mold is floated because it is necessary to constantly pressurize the resin. When trying to mold multiple molded products at the same time using a mold, if there are differences in the amount of resin supplied into the mold or the specific gravity of the fiber-reinforced resin, the pressure applied to the mold will become uneven, and as a result, the movable mold will It tends to tilt, making it impossible to apply the necessary pressure to the resin and causing defects such as underfilling in the molded product.

In particular, when molded products of different shapes are molded at the same time, the pressure is likely to become even more uneven, and the above-mentioned disadvantages become more pronounced. Therefore, molding must be carried out in one piece.

The present invention was developed to solve the above-mentioned problems, and its purpose is to be able to stampably mold multiple molded products with different shapes using one press machine, and to prevent molded products from having missing parts. The aim is to ensure that good quality products with no defects are obtained.

(Means for Solving the Problems) A means for solving the above problems is a press machine that charges heat-softened thermoplastic resin material into a mold and performs stampable molding, and has a plurality of mold parts. one mold comprising a mold, and the other mold comprising movable mold parts each divided corresponding to the plurality of mold parts,
a plurality of guide posts provided on the outside of the mold;
A press device for stampable molding comprising a mold ram that is moved by a moving means along the guide post and on which the one or the other mold is disposed, wherein the press device is provided on the mold ram and cooperates with the guide post. and a drive means for pressurizing and moving the divided movable mold sections independently.

(Effect of the above means) According to the above means, since the resin material is individually pressure-molded between the divided movable mold parts and the fixed mold part, multiple molded products with different shapes etc. are required. It can be molded at a high pressure, a plurality of good molded products can be obtained while simultaneously molding, and since it is a single press machine equipped with a common machine frame, the number of machines can be reduced even though it is intended to produce a plurality of molded products.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view of the main parts of the press 1, and FIG. 2 is a view taken in the direction of the arrow in FIG.

The machine frame 2 consists of guide posts 3 at the four corners, a lower base 4, and an upper frame 5, and a fixed mold 7 that forms a fixed part is provided at the middle lower part of the machine frame 2 via a support 6. The mold 7 has two mold parts 8, 9 in the embodiment, each mold part 8, 9 having an integral structure in the example, and the mold parts 8, 9 each having a separate shape.

The upper ram 10 is attached to the guide post 3 at the top of the machine frame 2.
The upper ram 10 is guided by two upper rams disposed diagonally on the base 4 of the machine frame 2, and the rods 11a of the lifting cylinders 11, 11 are connected to each other. , 11a, and is held at the upper limit position since the mold is in an open state in FIG.

The upper ram 10 is provided with a movable mold 12 forming an upper mold,
The movable mold 12 has divided mold parts 13 and 14 corresponding to the mold parts 8 and 9 of the fixed mold 7, and a molding cavity is formed between the mold parts 8 and 13 and 9 and 14 in a closed state. do. The movable mold 12 is mounted and supported by the upper individual mounting plates 15, 15, respectively.
15 is a pressure cylinder 1 suspended and supported by the upper ram 10.
The mounting plates 15, 15 are supported by rods 16a, 16a, 6, 16, and are guided up and down by guide bars 17 at the four corners.

On the upper ram 10, a member 19 extending in the front-rear direction is provided together with a cross member 18, and cylinders 20,
20, and lock pins 21 are provided on the rods 20a, 20a, respectively, and pin guides 22, 22 are provided on the left and right sides of the upper ram, respectively.
Lock holes 23 and 2 are provided at predetermined positions of the two guide posts 3A and 3A on the diagonal line facing 0 and 20.
3 is provided, and FIG. 4 shows the locked state.

In the above, the fiber-reinforced thermoplastic resin materials P and P1 softened by heating were placed on the mold parts 8 and 9 of the fixed mold 7, as shown in FIG.

Next, the hydraulic pressure rising position held by the cylinders 11, 11 is released, and the upper ram 10 is lowered by its own weight.
As a result, the upper movable mold parts 13 and 14 lower together and fit into the respective fixed mold parts 8 and 9, resulting in a mold closed state. At this position, the cylinders 20, 20 are driven to engage the lock pins 21, 21 with the lock holes 23, 23 of the posts 3A, 3A, and the upper ram 10 is locked at the lower limit position. This state is shown in FIG. 4, which is a view taken in the direction of the arrow in FIG. 3.

After locking the upper ram 10 that supports each mold part 13, 14 of the movable mold as described above, the cylinders 16, 16
The movable mold parts 13, 14 are lowered to pressurize the materials P, P1, and the upper and lower mold parts 13, 8 and 1
Press molding was performed between 4 and 9, and this state is shown in FIG.

Such press forming is performed individually and independently in each pair of mold parts 13, 8 and 14, 9, and therefore, even if the amounts and specific gravity of materials P and P1 and mold shapes are different, each pair of mold parts 13, 8 and 14, 9 can be formed with the necessary pressure and mold. Each can be molded by applying pressure accurately.

After molding, the pressing force of the mold parts 13, 14 is released, the lock pins 21, 21 are removed from the lock holes 23, 23 of the posts 3A, 3A, and the cylinders 11, 11 are driven to raise the upper ram 10 and open the mold. , molded product W,
Take out W1. This is shown in Figure 6.

7 to 12 show a second embodiment.

In the figure, 102 is the machine frame, 103... is the guide post,
104 is a base, 105 is a mount, and the cylinder 11
A fixed mold 1 that moves up and down has two mold parts 108 and 109 on an upper ram 110 that holds the mold open at 1,111.
Hold 07. On the other hand, guide posts 10 at the four corners
3 Guide 1 partitioned in the front and back direction at the left and right middle part of...
24, mounting plates 115, 115 are provided vertically and slidably between the guide 124 and the post 103, and the left and right cylinders 11 are mounted on the base 104.
6, 116 and are individually supported by mounting plates 115, 11.
Each mold part 113, 114 of the movable mold 112 is provided on the movable mold 112.

FIG. 7 shows the mold open state, with mold parts 113, 114
Materials P and P1 are placed on top, the cylinder 111 is released, and the upper ram 110 is lowered by its own weight, as shown in FIG. Lock pins 121, 121 to guide posts 103A, 103
A is engaged with the lock holes 123, 123 and locked, as shown in FIG. 10, and then the cylinder 11
6, 116 upward and lower mold parts 113, 114
Pressure is applied between the mold parts 108 and 109 to perform press molding. This is shown in Figure 11, and the first
Open the mold as shown in Figure 2 and take out the molded products W and W1.

As described above, instead of the above implementation, the mold may be turned upside down.

(Effects of the invention) As is clear from the above, according to the invention, during stampable molding of thermoplastic resin materials, after the mold ram is locked, the divided movable mold parts are pressed independently. It has the following effects.

Even if the amounts and specific gravity of the materials are different, or the shapes are different, they can be molded simultaneously using one device, and the resulting molded product will be of good quality without defects such as underfilling.

Since a plurality of molds can be molded at the same time with one device, the pressurizing means becomes complicated, but only one machine frame, mold ram, etc. are required, which is extremely advantageous in terms of cost.

Since multiple devices are not required, less installation space is required.

One of the mold parts is lowered by the mold ram along the guide post, and the mold ram is directly locked to this guide post by the stopper means provided on the mold ram, and then the divided movable mold parts are pressurized, so that the cylinder The stroke of the rod is also small, and compared to a device that locks parts other than the guide post, no extra moment is applied to the guide post, and the rigidity of the rod can be simplified, and problems such as scratches and deformation do not occur in the guide part.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1 is a front view of the main parts of the device in an open state, and Fig. 2 shows an embodiment of the present invention.
The figure is a view in the direction of the arrow in Figure 1, Figure 3 is a view of the mold in the open state, Figure 4 is a view in the direction of the arrow in Figure 3, Figure 5 is a view of the pressure molding state, and Figure 6 is a view of the mold. 7 to 12 show the second embodiment, FIG. 7 is a view of the mold in an open state, FIG. 8 is a view in the direction of the arrow in FIG. 7, and FIG. 10 is a view in the direction of the arrow in FIG. 9, FIG. 11 is a view of pressure molding, and FIG. 12 is a view of the molded product being removed from the mold. In the drawing, P and P1 are materials, 7 is a fixed type, 8,
9 is a mold part, 12 is a movable mold, 13 and 14 are mold parts, 1
6 is a driving means, and 21 and 23 are locking means.

Claims (1)

[Scope of utility model registration request] A press device that performs stampable molding by charging thermoplastic resin material that has been softened by heating into a mold, and includes one mold that has a plurality of mold parts, and a movable mold that is divided into parts corresponding to the plurality of mold parts. The other mold includes a mold part, a plurality of guide posts provided on the outside of the mold, and a mold ram that is moved by a moving means along the guide posts and on which the one or the other mold is disposed. In a press device for stampable molding, the mold ram is provided with:
A press for stampable molding, comprising a locking means that cooperates with the guide post to prevent movement of the mold ram, and a driving means that presses and moves the divided movable mold parts independently. Device.