CN104395016A - Molding machine - Google Patents

Abstract

The device that performs the pressurization process configured as a molding machine can be easily replaced with an electric pressurization unit that operates by an electric drive source or a hydraulic pressurization unit that operates by a hydraulic drive source, depending on the type of molded body to be manufactured, etc. , to achieve versatility and low cost. The molding machine is equipped with a cylindrical injection sleeve (12) for supplying molten metal and an injection plunger (13) that advances and retreats inside the injection sleeve (12). After injection filling in the cavity of the mold, the molding machine is equipped with an injection piston (14) that advances the injection plunger (13) and an injection manifold (15) that accommodates the injection piston (14) in a manner that can advance and retreat freely. The replacement mode is configured, and a hydraulic booster unit (70) or an electric booster unit (50) capable of further boosting the pressure of the molding material injected into the cavity of the mold is installed on the booster unit mounting surface (40), The pressurization unit mounting surface (40) is arranged on one side of the injection manifold (15).

Description

forming machine

technical field

The present invention relates to a molding machine such as a die casting machine that injects a molding material such as molten metal into a mold to manufacture a molded body.

Background technique

In a die casting machine conventionally used as a molding machine, the metal material melted in the melting furnace is measured and drawn in ladles for each shot, and the drawn molten metal is supplied to the liquid supply port of the injection sleeve, The molded molded body is formed by injecting and filling molten metal into the cavity of the mold by advancing the injection plunger provided so as to advance and retreat in the injection sleeve.

In the injection process of a die-casting machine that injects molten metal into a cavity of a mold, there is known a device that performs a pressurization process immediately before the end of the injection process. For example, Patent Document 1 discloses a device that uses a plunger to A molding machine such as a die-casting machine that increases the pressure of the molding material in the cavity.

【Prior technical literature】

【Patent Literature】

[Patent Document 1] Japanese Patent Laid-Open No. 2011-224626

Contents of the invention

【Problems to be solved by the invention】

However, the prior art disclosed in Patent Document 1 uses hydraulic pressure as the drive source for the pressurization process, and does not disclose or suggest any application of an electric drive source as the drive source for the pressurization process. That is, as the drive source for the pressurization process, there is no case where an electric drive source or a hydraulic drive source is applied, which has an interchangeable structure, so it is extremely difficult to switch the pressurization process according to the user's desire, the type of molded body to be manufactured, and the like. drive source, so there is such a problem as inconvenience.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an electric booster that can be easily replaced with an electric drive source to operate a device configured as a molding machine that performs a pressurization process according to the type of molded object to be manufactured. unit, or a hydraulic booster unit operated by a hydraulic drive source, thereby realizing a molding machine with excellent versatility and low cost.

【Proposal to solve the problem】

The invention of this molding machine includes a cylindrical injection sleeve for supplying molten metal and an injection plunger that advances and retreats in the injection sleeve, and the molding material is injected into the cavity of the mold after the mold is closed by advancing the injection plunger. Inner injection filling, the molding machine is characterized in that the molding machine includes an injection piston that advances the injection plunger and an injection manifold that accommodates the injection piston in a manner that can move forward and backward freely, and is configured in a replaceable manner, A hydraulic booster unit or an electric booster unit capable of further boosting the pressure of the molding material injected and filled into the cavity of the mold is mounted on a booster unit mounting surface provided on the injection mold. face on one side of the manifold. .

The invention of the molding machine is characterized in that the hydraulic pressure booster unit is mounted on the pressure booster unit mounting surface using a mounting unit provided on the pressure booster unit mounting surface.

The invention of the molding machine is characterized in that the electric booster unit is attached to the booster unit attachment surface using an attachment unit provided on the booster unit attachment surface.

The invention of the forming machine is characterized in that the mounting means is a screw hole formed on the mounting surface of the pressure boosting means.

【Invention effect】

According to the present invention, according to the desire of the user using the molding machine, as the driving source for pressurizing the molten metal injected into the cavity of the mold, either one of the hydraulic pressure boosting unit or the electric pressure boosting unit can be selectively used. installed and used. That is, according to various conditions such as the shape and size of the molded body, a hydraulic booster unit or an electric booster unit can be applied. Therefore, for example, when manufacturing a relatively large molded body, a high-quality product can be obtained by installing a hydraulic booster unit. Shaped body. On the other hand, when multi-stage boosting is necessary, it is difficult to perform fine boosting control in hydraulic control, so by using an electric booster unit that uses an electric servo motor as a drive source, it can be adjusted according to the shape of the molded body, etc. Desired multi-level control. Thereby, a molding machine excellent in controllability can be provided, which is very valuable. Furthermore, it is known that when an electric booster unit is used, the number of parts such as an electric servo motor constituting the electric booster unit and a detection unit for detecting the rotational speed of the electric servo motor increases, and the control becomes complicated, leading to an increase in cost, but Users who want to avoid high equipment costs, or when multi-stage pressurization control is not required for the production of molded objects, can suppress equipment costs to be cheap by providing a molding machine equipped with a hydraulic pressure booster unit.

Description of drawings

Fig. 1 is a block diagram showing an injection mechanism of a die casting machine according to the present invention, showing a state where an electric booster unit is attached.

Fig. 2 is a block diagram showing the injection mechanism of the die casting machine according to the present invention, showing a state where a hydraulic booster unit is attached.

Fig. 3 is a structural view showing a pressurizing unit mounting surface of an injection mechanism to which a hydraulic booster unit or an electric booster unit is mounted.

Detailed ways

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3 . Needless to say, the present invention can be easily applied to structures other than those described in the embodiments within the range that does not violate the gist of the present invention.

An injection mechanism 1 constituting a die-casting machine as a molding machine shown in FIG. Molten metal forming material.

The injection mechanism 1 is provided with: a cylindrical injection sleeve 12 integrally provided on the fixed die plate 2 and having an injection port 11 for supplying molten metal to the upper part; An injection piston 14 integrally provided at the rear end of the injection plunger 13 ; and an injection manifold 15 that holds the injection piston 14 freely.

In addition, on the booster unit mounting surface 40 on the rear surface of the injection manifold 15, as shown in FIG. In addition to the electric booster unit mounting hole 41, a hydraulic booster unit mounting hole 42 used when the hydraulic booster unit 70 is screwed to the booster unit mounting surface 40 instead of the electric booster unit 50 is also formed. The pump line hole 43 , the ACC line hole 44 , and the tank line hole 45 are used as oil passages when the pressure unit 70 is mounted on the booster unit mounting surface 40 .

In addition, on the supercharging unit installation surface 40, a hydraulic/electric common hole 46 is formed, and the hydraulic/electric common hole 46 is inserted through the following member: the electric supercharging unit 50 is installed on the supercharging unit installation surface. The piston-type spool valve 16 operated in the state of 40;

Here, the injection mechanism 1 when the electric booster unit 50 is mounted on the booster unit mounting surface 40 will be further described based on FIG. 1 . As shown in FIG. 1 , behind the injection piston 14 is a piston that presses the injection piston 14 and advances the injection plunger 13 when injecting and filling molten metal supplied into the injection sleeve 12 into the cavity of the mold, etc. The piston type spool valve 16 is inserted through the hydraulic/electric common hole 46 and is configured. The piston type spool valve 16 uses an electric servo motor 17 as a driving source, and the driving transmission mechanism 19 composed of a driving transmission belt 18 etc. drives the transmission plate electrically. 20 performs a forward motion and thus is pushed forward. It should be noted that the electric booster unit 50 constituted by the piston type slide valve 16, the electric servo motor 17, the drive transmission mechanism 19, the electric drive transmission plate 20, etc., performs the power supply by moving the electric drive transmission plate 20 forward. The injection process of filling the cavity of the mold with the molten metal in the injection sleeve 12, the pressurization process performed just before the end of the injection process, and, as shown in FIG. The transmission plate 20 or the injection piston 14 are not integrally assembled but are arranged separately. The rear end (right side shown in FIG. 1 ) of the piston-type slide valve 16 can also constitute a non-illustrated device for detecting whether the motor is driven or not. The plate 20 is a load cell (pressure detecting means) of the pressure generated when the piston type spool valve 16 is pressed.

In addition, the injection mechanism 1 is provided with a hydraulic operating unit 21, and the injection piston 14 in the injection manifold 15 is advanced by the hydraulic pressure of an accumulator (hereinafter referred to as ACC) 22 constituted in the hydraulic operating unit 21, and the hydraulic operating unit 21 moves forward. 21 is composed of: a plurality of control valves 23 arranged on the oil passage connecting the ACC22 and the first oil chamber of the injection manifold 15, having a direction switching function and a flow control function and performing a function of controlling the injection plunger 13 through the injection piston 14 Forward hydraulic control; a hydraulic pump 26 driven by a motor 25 arranged on the oil line connecting the control valve 23 to the tank 24; The hydraulic flow rate adjustment valve 28 of the valve; and the pressure sensor 27 arranged in the second oil chamber of the injection manifold 15, etc.

In addition, in the die casting machine, the control unit 30 is configured to perform the operation of the hydraulic operation unit 21 caused by the opening and closing of the control valves 23 and 28 based on the detection results of the pressure detected by the load sensor or the pressure sensor 27, and the operation of the electric servo. The control of the drive of the motor 17, etc., is responsible for the overall control of the die casting machine; the display unit 31 that displays the setting information of the die casting machine; and is used to set various values displayed on the display unit 31 to desired values. The key input unit 32 and the like.

Next, the injection mechanism 1 when the hydraulic booster unit 70 is attached to the booster unit mounting surface 40 instead of the electric booster unit 50 will be further described based on FIG. 2 . As shown in FIG. 2 , at the rear of the injection piston 14 , when the pressurization process is performed immediately before the injection process of injecting and filling the molten metal supplied into the injection sleeve 12 into the cavity of the mold is completed, the injection piston 14 is The aforementioned hydraulic piston 71 that presses the injection plunger 13 is inserted through the hydraulic/electric common hole 46 , and the control unit 30 controls the hydraulic booster unit control valve 72 and the like of the hydraulic booster unit 70 . , the hydraulic piston 71 advances by the hydraulic pressure of the ACC 22 , and presses the injection piston 14 in the injection cylinder 15 . It should be noted that, in the injection process, the low-speed injection process performed before the pressurization process and the high-speed injection process performed after the low-speed injection process are not performed with the advancement of the hydraulic piston 71, but are performed by using The hydraulic actuating unit 21 advances the injection piston 14 (the hydraulic piston 71 does not advance during the low-speed injection process and the high-speed injection process).

As described above, according to the die casting machine of this embodiment, the cylindrical injection sleeve 12 for supplying molten metal and the injection plunger 13 advancing and retreating inside the injection sleeve 12 are provided, and the molten metal is injected into the The cavity of the closed mold is injected and filled. The die casting machine is equipped with an injection piston 14 that advances the injection plunger 13 and an injection manifold 15 that accommodates the injection piston 14 in a manner that can move forward and backward freely. The threaded holes (hydraulic booster unit mounting holes 42 or electric booster unit mounting holes 41) on one side of the mounting unit as the booster unit mounting surface 40 will make the molten metal injected into the cavity of the mold The hydraulic booster unit 70 or the electric booster unit 50 for further boosting the molten metal pressure is provided on the booster unit mounting surface 40 in a simple and replaceable manner by screwing with bolts or the like. As a result, either the hydraulic booster unit 70 or the electric booster unit 50 can be selectively attached and used as a drive source for boosting the molten metal injected into the cavity of the mold. That is, according to various conditions such as the shape and size of the molded body to be formed, the hydraulic pressure booster unit 70 or the electric booster unit 50 can be applied. Therefore, for example, when manufacturing a relatively large molded body, by installing the hydraulic pressure booster unit 50, A high-quality molded body is obtained. On the other hand, when it is necessary to perform multi-stage boosting, since it is difficult to perform fine boosting control in hydraulic control, by using the electric booster unit 50 with the electric servo motor 17 as the driving source, the etc. can perform desired multi-level control. Thereby, a molding machine excellent in controllability can be provided, which is very valuable. Furthermore, it is known that when the electric booster unit 50 is used, the number of parts such as the electric servomotor 17 constituting the electric booster unit 50 and a detection unit (not shown) for detecting the rotation speed of the electric servomotor 17 increases, and the control becomes complicated. It will lead to an increase in cost, but users who want to avoid high equipment cost or when multi-stage pressurization control is not required for the manufacture of molded objects can suppress equipment cost by providing a die-casting machine equipped with a hydraulic pressure booster unit 70 Get cheap.

【Description of labels】

3 fixed mold (mold)

5 Mobile mold (mould)

12 injection sleeve

13 Injection plunger

15 Injection Manifold

40 Booster unit mounting surface

41 Mounting hole for electric booster unit (as threaded hole for mounting unit)

42 Mounting hole for hydraulic booster unit (as threaded hole for mounting unit)

50 electric booster unit

70 hydraulic booster unit

Claims (4)

1. A molding machine comprising a cylindrical injection sleeve for supplying molten metal and an injection plunger that advances and retreats in the injection sleeve, and the molding material is injected into the mold after the mold is closed by advancing the injection plunger. cavity injection filling, the molding machine is characterized in that, The molding machine includes an injection piston that advances the injection plunger, and an injection manifold that accommodates the injection piston in a moveable manner, It is configured in a replaceable manner, and a hydraulic booster unit or an electric booster unit capable of further boosting the pressure of the molding material injected into the cavity of the mold is mounted on the booster unit installation surface, and the booster unit A unit mounting surface is provided on one surface of the injection manifold. 2. The forming machine according to claim 1, characterized in that, The hydraulic booster unit is installed on the booster unit installation surface using an installation unit provided on the booster unit installation surface. 3. The forming machine according to claim 1, characterized in that, The electric supercharging unit is installed on the supercharging unit installation surface using an installation unit provided on the supercharging unit installation surface. 4. The forming machine according to claim 1 or 2, characterized in that, The installation unit is a threaded hole formed on the installation surface of the pressurization unit.