JPS6377712A - Die for press molding - Google Patents

Abstract

PURPOSE:To avoid the existence of deviation between a top force and a bottom force and to mold moldings having an excellent degree of concentricity in a short time, by always positioning the top force and the bottom force in a trunk mold and providing a cooling gas blow-off hole in the trunk mold. CONSTITUTION:A top force 6 and a bottom force 5 are always placed in a trunk mold 1 over the whole press process. No occurrence of gap between the top and bottom forces 6 and 5 and the trunk mold is thereby generated when the molds are closed. A preheated and softened raw material 2 is pressed by the top force 6 and the bottom force 5 to obtain a molding 2' without any flash, which is immediately cooled with a cooling gas blown out from a blow-off hole 1d. Centering between the top and the bottom forces can be accurately carried out and a molding having excellent concentricity can be therby easily obtained. lt is also achieved to shorten the molding period by blowing the cooling gas.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a press molding mold, and is a press molding mold that is capable of high-performance tip nibless molding of pressed products with good concentricity and no burrs. This is related to the improvement of.

[Conventional technology]

Conventionally, when molding a pressed product, for example, 2 Japanese Patent Application Laid-open No. 51
As shown in Publication No. 60208, after supplying a softened material heated to a temperature higher than that required for molding into the lower mold,
The upper mold is lowered, and the upper mold is placed into a body mold in which the lower mold is slidably assembled and pressurized.

[Problem that the invention seeks to solve]

However, in the conventional press molding die described above, there is room for further improvement in the first point.

(1) In order to reliably insert the second mold into the body mold each time press molding is performed, the axes of the upper mold and the lower mold must be aligned with high precision. Further, it is necessary to have a press structure with sufficiently high rigidity so that the axis will not be deviated by deformation due to load or heat during press molding.

(2) Since the gap between the upper mold and the body mold cannot be made smaller, the upper and lower surfaces of the press-formed product are largely misaligned with respect to the outer diameter, making it difficult to obtain a molded product with good concentricity.

(3) Due to the large gap between the upper and lower molds and the copper.

The softened material easily enters this gap, and therefore,
Press-formed products also tend to have "-burrs", and it is necessary to remove burrs from the molded products. Also.

If the molded product is broken when the molded product is taken out, it remains in the mold and causes problems in continuous press molding.

(4) The mold is cooled after pressing by a natural cooling method with the mold heater turned off.
It took a long time for the mold temperature to drop to a temperature at which the molded product could be removed, resulting in long press molding cycle times.

The present invention has been made in consideration of one or more points,
The objective is to create an improved press-forming product that can efficiently form press-formed products with good concentricity and no burrs, and which does not require alignment of the upper and lower dies. In order to achieve the above object, the present invention forms a void that has almost the same shape as the finished press product when the mold is closed. A mold and a lower mold that slide up and down inside the body mold, a material supply device that supplies softened material heated to a temperature above the temperature required for press molding into the lower mold, and a finished product that takes out the press-formed product. In a press-forming mold equipped with a take-out device, an upper mold that is always located in the body mold throughout the entire press-forming process, a softening material supply 1 provided on a copper side surface, a press-molded product take-out port, and a It is characterized by having a cooling gas outlet made of copper located below the material supply port and the press-molded product outlet.

[Effect]

According to the present invention, when pressurizing a softened material heated to a temperature higher than that required for press molding, not only the lower mold but also
Since the upper mold is always located within the body mold throughout the entire pressing process, the gap between the lower mold and the copper mold can be reduced to almost zero, creating a press molding mold that does not generate flash. can be obtained. In addition,
In that case, the supply port for the softened material and the outlet for the press-formed product are provided on the side of the copper, so even if the upper mold is always located inside the body mold throughout the entire press-forming process, the material There is no problem in supplying and removing the press-formed product.

In addition, in the present invention, the gap between the upper and lower molds and the copper mold can be reduced to almost zero, which means that the centering of the upper and lower molds can be performed with high accuracy without adopting a press structure with particularly high rigidity. It is possible to easily obtain a molded product with excellent concentricity and no misalignment of the upper and lower surfaces with respect to the outer diameter of the press-formed product. Furthermore, when using the press molding die according to the present invention, as mentioned above, no beams are generated, which means that troubles such as the finished product getting caught in copper when taking out the press molded product can be prevented. This not only allows the operation to be performed smoothly, but also prevents burrs from remaining inside the lower mold.
Deburring work can be omitted.

In addition, in the present invention, a cooling gas discharge port is provided in copper, located below the softened material supply port and the press finished product outlet, so that after pressing is completed, the lower mold can be moved to the location of the discharge port. By moving and spraying cooling gas, the mold cooling time can be shortened, and the cycle time of press molding can be shortened.

〔Example〕

The present invention will be explained below based on one embodiment of FIGS. 1 to 8. FIG. 1 is a longitudinal sectional front view showing the overall configuration of a press molding die according to the present invention, and FIG. Code 1 in 1 figure
A vertical cross-sectional front view of the copper body shown in FIG.

FIG. 3 is a side view of FIG. 2, and FIG. 4 is a cross-sectional view taken along the line ■-■ of FIG.

In FIGS. 1 to 4, reference numeral 1 is made of cylindrical copper, and a rectangular softening material supply port 1α is provided on the side of the copper 1.
, facing the supply port 1α (press-formed product outlet 1
h, and the width of the press-formed product outlet 1h (same shape as the softened material supply port 1α) is equal to the inner diameter of the copper plate 1 in order to enable the molded product to be taken out from the lower mold 5, which will be described later. It has been processed to a greater extent.

Further, the copper plate 1 is provided with a cooling gas discharge port 1d located below the press-molded product outlet 1b of the softened material supply port 1, and has a cooling structure.

The copper plate 1 is fixed to the mold holder 10 by bolts 11 inserted into the mounting holes 9.

6 is attached to a press ram (not shown).

It shows the upper mold that slides vertically within the body mold 1, and the upper mold 6
is always located within the side mold 1 throughout the entire press molding process. 5 has an embossing rod 5α that passes through the through hole IC of the copper plate 1 and is connected to a hydraulic press (not shown). This is a lower mold that slides vertically within the body mold 1. Therefore, the gap between the outer diameter of the upper mold 6 and lower mold 5 and the inner diameter of the copper plate 1 is almost zero, and when the mold is closed, the above-mentioned upper and lower molds 6.5 and the copper plate 1 form a finished pressed product. A void of approximately the same shape is modeled.

3 is a chute arranged horizontally facing the softened material supply port 1α of the copper plate 1; 4 is a material supply device 7 for rolling the softened material 2 on the sheet 3 and feeding it into the lower die 5 is a press-molded product outlet; The press-formed product take-out device 7 is a press-formed product take-out device disposed on the 1h side.

2. It has a suction part 7α and is driven by a motor (not shown). Reciprocate horizontally. 8 is the upper mold 6. and a heating furnace that heats the lower mold 5 to a predetermined temperature required for press molding.

The present invention has the above-described configuration and has a secondary structure.

The operating system of the press molding die shown in the illustrated embodiment will be explained based on FIG. 1 and FIGS. 5 to 8. In FIG. 5, the upper mold in FIG. 6 is a longitudinal sectional view showing the state in which they are in contact, FIG. 6 is a longitudinal sectional front view of the softened material 2 being pressed using the press molding die shown in FIG. 1, and FIG. FIG. 8 is a longitudinal sectional front view of the mold being cooled following the pressing process, and FIG. 8 is a longitudinal sectional front view of the press-formed product 2' being removed from the mold following the cooling process shown in FIG. It is a diagram.

・7・ When the upper and lower molds 6 and 5 in FIG. 1 are heated to a predetermined temperature in the heating furnace 8, the softened material 2 is heated and softened in another heating furnace (not shown).

The sheet 3 in FIG. 1 is pushed and rolled by the material supply device 4 moving forward in the direction of the arrow in the figure, falls from the softened material supply port 1α of the copper plate 1, and is supplied into the lower mold 5. and,
Thereafter, the material supply device 4 is moved back, and the upper die 6 is lowered within the body die 1 and is fitted onto the copper plate 1 (FIG. 5). In addition, the upper mold 6
maintains this state until the end of the press. Next, as shown in FIG. 6, the lower die 5 is pushed up via the embossing rod 5a, and the softened material 2 is pressurized by the upper die 6 and the lower die 5.
The mold is closed, and a press-molded product 2' is formed in the upper and lower molds 6 and 5. When the press-formed product 2' is molded,
Subsequently, as shown in Fig. 7, after the upper mold 6 has risen to its original predetermined position, the molded product ejection device moves in the direction indicated by the arrow (Fig. 7).
direction, and stops at the position where the suction part 7α is above the lower mold 5. Furthermore, a lower mold 5 was provided at the lower part of the opening of the copper plate 1. It rises to the top of the cooling gas discharge port 1d. At the same time, it was installed at the bottom of the opening of Copper Panel 8.1. Cooling gas outlet 1d
Then, cooling gas is blown out from the suction part 7α to cool the lower die 5 and the press-molded product 2'.

When the temperature of the press-formed product 2' falls to a predetermined take-out temperature, the lower mold 5 is moved through the stamping rod 5α to the press-formed product 2'.
is pushed up until it lightly contacts the suction part 7α of the extraction device 7. When the press-molded product 2' is sucked into the suction section 7α of the take-out device 7, the lower die 5 is lowered.

The pressed finished product 2' is released from the lower die 5. and,
When the press-formed product removal device 7 retreats in the direction of the dotted line arrow in FIG. 7 and the press-formed product 2' is transferred to a storage location (not shown), the vacuum pump of the molded product removal device 7 stops;
Gas is introduced into the suction part 7α, and the press-formed product 2' is stored in the storage location.

Note that the upper and lower molds 6 and 5 are heated again to a predetermined temperature at the position shown in FIG. You can only get

The configuration and operation system of the press molding die according to the present invention are as described above.1 In the present invention, when pressurizing the softened material 2 heated to a temperature higher than the temperature required for press molding, the lower mold 5 In addition, since the upper mold 6 is always located within the body mold 1 throughout the entire pressing process, the gap between the upper and lower molds 6, 5 and the copper metal 1 can be reduced to almost zero.
It is possible to obtain a press molding die that does not cause flashing.

In this case, since the supply port 1a of the softened material 2 and the take-out port 1h of the press-formed product 2' are provided on the side surface of the copper metal 1, the upper mold 6 is always in contact with the body mold throughout the entire press-forming process. Even if it is located within 1, the supply of material 2 and the press-formed product 2
There is no problem in taking out the .

In addition, in the present invention, the gap between the upper and lower molds 6, 5 and the copper metal 1 can be reduced to almost zero, which means that the upper and lower molds 6 and 5 can be made almost zero even without adopting a press structure with particularly high rigidity. .

Furthermore, when the press molding mold according to the present invention is used,
As mentioned above, the absence of burrs prevents problems such as the core molded product 2' getting caught on the copper metal 1 when taking out the press molded product 2', and allows the operation to be carried out smoothly. Furthermore, since no burrs remain in the lower die 5, the burr removal work can be omitted.

Furthermore, in the present invention, a cooling gas outlet is provided in the copper metal 1, located below the softened material supply port 1α and the press-formed product outlet 1h, so that the lower mold 5 can be removed from the By moving the cooling gas to the upper part of the cooling gas outlet and cooling it, the mold cooling time can be shortened, and the cycle time of press molding can be shortened.

In the two illustrated embodiments, the softened material supply port 1α and the press finished product outlet 1h have rectangular shapes, but the shapes are not limited to rectangles. That is, the softened material supply port 1α only needs to have a diameter of 11 mm to be able to supply the softened material 2 into the lower die 5, while the press finished product outlet 1
h may be of a size that allows the pressed finished product 2' to be taken out from the lower mold 5, and both the softened material supply port 1a and the pressed finished product outlet 1h may have an elliptical shape, for example.

In addition, in the illustrated embodiment, a case is illustrated in which the softened material supply port 1α and the pressed finished product outlet 1h are bored in the copper metal 1, but the softened material supply port 1α and the pressed product outlet 1b described above are When shared in one opening, copper metal 1
It has excellent manufacturability.

〔Effect of the invention〕

The present invention is as described above, and as is clear from the description of the illustrated embodiments, according to the present invention, it is possible to efficiently form a press-formed product with good concentricity and no burrs. It is possible to obtain an improved press molding die that does not require centering of the upper and lower dies.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing a press mold according to an embodiment of the present invention, FIG. 2 is a vertical sectional view showing a 12° body type in FIG. 4 is a cross-sectional view taken along If-Fi' in FIG. 2, and FIG. 5 is a state in which the upper mold in FIG. FIG. 6 is a vertical cross-sectional view showing the pressurized state by the press mold according to FIG. 1, and FIG. 7 is a vertical cross-sectional view showing the cooling state of the press mold according to FIG. The plan view and FIG. 8 are longitudinal cross-sectional views showing a state in which a pressed product is taken out from the press die according to FIG. 1. 1・・・・・−・・・・・・Copper genus

Claims (1)

[Claims] 1. An upper mold and a lower mold that slide up and down inside the body mold form a void that has almost the same shape as the finished press product when the mold is closed, and a softened material that is heated to a temperature higher than that required for press molding. In a press molding die that is equipped with a material supply device that supplies material into the lower mold and a finished product take-out device that takes out the pressed finished product, the upper mold and the side surface of the body mold are always located within the body mold throughout the entire press molding process. a softened material supply port and a press-molded product outlet provided in the body, and a cooling gas outlet provided in the body mold, located below the softened material supply port and press-molded product outlet. A press molding die characterized by: