JPH0356343Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a slide table device used in vertical injection molding machines, transfer molding machines, and the like.

(Prior art and its problems) Conventionally, a slide table device for a vertical injection molding machine has a system in which the slide table 6' is moved by directly contacting the base plate 1', as shown in FIGS. 4 and 5. As shown in FIGS. 6 and 7, the slide table 6' is moved by placing it on the guide rail 3' laid on the base plate 1'.
A method is known in which the guide rail 3' is bent during mold clamping, but in the former case, the slide table 6'
The base plate 1' and the slide table 6' cannot be easily moved, and the base plate 1' and the slide table 6' are worn out. Moreover, in the latter case, the parallelism of the mold becomes out of order, resulting in a decrease in molding accuracy, and unavoidable disadvantages arise in that unreasonable force is applied to the guide rail 3' and the like.

(Purpose of the invention) The present invention has been made in order to solve the above-mentioned conventional problems, and aims to always ensure stable movement of the slide table and improve molding accuracy.

(Means for solving the problem) The slide table device of the present invention has a guide rail laid on a base plate, a table pedestal that is movable along the guide rail, and does not come into contact with the table pedestal. A slide table that can be placed on the base plate astride the base plate is supported on the table pedestal via an elastic body, and a gap is provided between the slide table and the base plate, and the force of the elastic body is It is characterized in that it is set to be larger than the weight of the slide table and the mold mounted on the slide table, and smaller than the mold clamping force.

(Example) An example of the present invention will be described below with reference to FIGS. 1 to 3.

In the figure, reference numeral 1 denotes a base plate, which is installed on a fixed platen 2, and a guide rail 3 is laid on the base plate 1.

Reference numeral 4 denotes a table pedestal with an inverted U-shaped cross section, which is installed astride the guide rail 3, and a bearing engaged with the guide rail 3 is disposed inside the leg portion 4a of the table pedestal 4, which faces the guide rail 3. 5 is installed. Therefore, the table pedestal 4 can be easily moved along the guide rail 3 by the bearing 5. The bearing 5 uses linear balls or rollers with minimal wear.

Reference numeral 6 denotes a slide table with an inverted U-shaped cross section, which is large enough to be placed on the base plate 1 while straddling the table pedestal 4 without contacting it, and a mold that is received via a mold mounted on the slide table 6. It has enough strength to withstand the tightening force, and the table pedestal 4
It is supported on the top via an elastic body 7 (a compression spring in the embodiment), and the slide table 6 is supported except when the mold is clamped.
A gap 8 is provided between the lower end of the leg portion 6a and the base plate 1. Therefore, the slide table 6 can move without contacting the base plate 1.

The force of the elastic body 7 is set to be slightly larger than the own weight of the slide table 6 and the mold 9 mounted on the slide table 6, but smaller than the mold clamping force.

The two slide tables 6 are connected and can be moved alternately to the mold clamping position by a moving device 10. Then, the mold 9 on one slide table 6 placed in the mold clamping position and the mold 13 mounted on the movable platen 12 are moved by the mold clamping device to move the movable platen 12 downward via the tie bars 14. This makes it possible to clamp the mold.

16 is a plasticizing and injection device.

In this embodiment, an example in which the elastic body 7 is a spring has been described, but it goes without saying that it may be made of elastic rubber, a cylinder, or the like.

(Function) After performing each process of mold clamping, resin injection, holding pressure and solidification, and mold opening, the ejector mechanism 15 discharges the molded product.
This is done at the mold clamping position or standby position. This injection molding operation is repeated by replacing the mold 9 by moving the slide table 6, but when the mold is not clamped, there is a gap 8 between the slide table 6 and the base plate 1, and the slide table 6 is elastic. The slide table 6 is supported by the table pedestal 4 via the body 7, and the table pedestal 4 is engaged with and supported by the guide rail 3 via the bearing 5. Move along. Also, when clamping the molds 9 and 13,
The elastic body 7 contracts due to the mold clamping force, and the base plate 1
The gap 8 between the base plate 1 and the slide table 6 is eliminated, and the slide table 6 is directly attached to the base plate 1.
Because it is supported by the mold, uniform mold clamping can be performed. on the other hand,
The table pedestal 4 is only subjected to the force of the elastic body 7 trying to return to its original position. No strain is placed on the guide rail 3 and bearing 5.

Although this embodiment has been described as an example of a slide table device for a vertical injection molding machine, it goes without saying that the present invention can also be applied as a slide table device for a transfer molding machine, for example.

(Effects of the invention) As described above, the present invention allows the slide table to be moved easily without contacting the base plate except during mold clamping, ensures stable movement, and protects the guide rails and bearings during mold clamping. Because the mold clamping force can be reliably received by the slide table and base plate without applying excessive force,
The above-mentioned mobility can be maintained at all times, and the molding precision can be improved.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing an embodiment of the present invention, Fig. 2 is a plan sectional view taken along the - line of Fig. 1 showing the main parts, and Fig. 3 is an enlarged right side of Fig. 2. 4 and 5 are plan views and front views showing conventional examples; FIGS. 6 and 7 are plan views showing other conventional examples;
It is a front view. 1...Base plate, 3...Guide rail,
4...Table pedestal, 5...Bearing, 6...
Slide table, 7... elastic body, 8... gap,
9... Fixed side mold. 13...Movable side mold.

Claims (1)

[Scope of utility model registration request] A guide rail is laid on the base plate, a table pedestal that is movable along the guide rail is provided, and a slide table that can be placed on the base plate while straddling the table pedestal without contacting the table pedestal is placed on the table pedestal. is supported via an elastic body, and a gap is provided between the slide table and the base plate, and the force of the elastic body is greater than the own weight of the slide table and the mold mounted on the slide table, A slide table device characterized in that the force is set smaller than the mold clamping force.