JPH0419005B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a molding machine that can be used for molding multiple types of powder materials using one machine.

[Conventional technology]

Injection molding is a molding method in which powdered materials such as ceramics, metals, ceramic metals, resins, etc. are supplied, and a molded product is obtained by injecting the material supplied into a sleeve into the cavity of a clamped mold using a plunger. extrusion molding, in which the material supplied in a container is extruded through the hole of a die using a stem and mandrel to obtain a hollow, long molded product; and extrusion molding, in which the material is supplied into a mold whose bottom is closed with a lower plate to make it airtight. After the mold is clamped, the upper punch is lowered into the material to obtain a molded product. Flow consolidation molding is where the upper punch is lowered into the material to obtain a molded product, and the material supplied into the mold is pressurized from above and below with an upper punch and a lower punch to create a molded product. etc. are known.

The molded products obtained by each of these molding methods have different shapes and dimensions depending on the molding method, for example, extrusion molding produces long cylindrical products, and press molding produces bottomed cylindrical products. There are also restrictions. Therefore, when molding products of various shapes and dimensions, conventionally, two or more types of molding machines that can perform molding methods suitable for the shapes have been installed.

[Problem that the invention seeks to solve]

In this way, in the past, many types of molding machines were installed to obtain various molded products, which not only increased equipment costs and required a large installation space, but also caused problems with the machine operating rate due to the balance of production volume. There was a problem with the decrease in

[Means for solving problems]

In order to solve such problems, in the present invention, a plurality of fluid pressure cylinders are arranged above and below a horizontal member provided with a center hole penetrating vertically, and the working end of each of these fluid pressure cylinders is provided with a center hole. A molding tool was provided which was selectively mounted with the hole and axis substantially aligned and used for at least two types of molding among injection molding, extrusion molding, fluid consolidation molding, and press molding.

[Effect]

In the case of injection molding, each fluid cylinder is equipped with an upper mold, a pressure block, a split mold, a plunger, and a sleeve, and the material supplied to the sleeve is transferred to the cavity of the mold, which is clamped by the pressure block. A molded product can be obtained by injecting into the interior with a plunger.

In the case of extrusion molding, each fluid pressure cylinder is equipped with a stem, a mandrel, a container, and a molded product ejecting jig, and the material supplied into the container is extruded downward from the die of the container using the stem and mandrel to form the material. Goods can be obtained. Cut the molded product using a removal jig.

In the case of fluid consolidation molding, each fluid pressure cylinder is equipped with an upper mold, an upper punch, a mold and a protruding rod with a lower punch, and material is supplied into the mold, and the lower end of the mold is punched with the lower punch. After the mold is closed airtight and the mold is clamped, the upper punch is lowered into the material to obtain a molded product.

In the case of press forming, each fluid pressure cylinder is equipped with a pressure block, a mold, and a pressure rod, and the material supplied into the mold is passed through the upper punch of the pressure block and the lower punch of the pressure rod. A molded product can be obtained by applying pressure from above and below.

〔Example〕

1 to 4 are schematic vertical cross-sectional views showing embodiments of the molding machine according to the present invention, respectively.
The figure is a vertical cross-sectional view showing the state in use as an injection molding machine, Figure 2 is a vertical cross-sectional view showing the state in use as an extrusion molding machine, and Figure 3 is a vertical cross-sectional view showing the state in use as a fluid compression molding machine. The top view and FIG. 4 are longitudinal cross-sectional views showing the state in use as a press molding machine. First, frames, cylinders, etc. commonly used in the molding machines shown in each figure will be explained. The vertical frame of the molding machine 1 is formed in a U-shape and is equipped with legs 2 fixed on a floor foundation. The base 3 is fixed. Further, an upper plate 5 formed in a horizontal rectangular shape is fixedly supported by tie rods 4 erected at the four corners of the base 3. Three hydraulic cylinders serving as pressure cylinders and two hydraulic cylinders are located and fixed above and below the base 3, respectively.

That is, a first cylinder 6, a second cylinder 7, and a third cylinder 8 are fixed to the upper plate 5 in parallel with the working ends of piston rods 6a, 7a, and 8a facing downward. A fourth cylinder 9 and a fifth cylinder 10 are fixed in parallel with each other with the working ends of piston rods 9a and 10a facing upward. A first holder 11 is provided at the working end of the piston rod 6a of the first cylinder 6 and is formed into a cylindrical shape with a bottom that coincides with the axis of the second cylinder 7 and holds molds on the lower side. A piston rod 7a of the second cylinder 7 faces inside, and a circular hole 11a is provided in the center of the bottom plate into which a forming tool such as a pressure block, mandrel, punch, etc., which will be described later, is inserted. Further, at the working ends of the piston rods 8a and 9a, a second holder 12 and a third holder 13 of irregular shapes are provided, respectively.
are attached to each holder, and various molding tools can be attached to each holder as required. Reference numeral 14 denotes a plate fixed at the center of the base 3, and holes 14a, 3a are provided at the center of the plate and at the pace 3, coinciding with the axes of the second cylinder 7 and the circular hole 11a. The above is the main body of the molding machine, which consists of a frame, a holder, etc., which are commonly used for each molding method that will be explained later.

The holder 11 of the main body formed in this way and the second
The working ends of the to fifth cylinders 7, 8, 9, and 10 are selectively fitted with molding tools used for injection molding, extrusion molding, fluid consolidation molding, and press molding. First, the case of injection molding will be explained based on FIG. 1. An upper mold 15 having a downward convex portion is attached to the holder 11 of the first cylinder 6 with a substrate fixed thereto, and an inner hole 1 of the holder 11 is attached to the piston rod 7a of the second cylinder.
A cylindrical pressure block 16 that can be inserted into 1a is attached. Furthermore, a retaining ring 18 attached to the piston rod 8a of the first cylinder 8 is attached to the tapered portion of the split mold 17 attached to the plate 14.
The taper hole of 8 is fitted, and the piston rod 8
The split mold 17 is pressed and fixed to the plate 14 by the holding ring 18 by advancing the part a. Furthermore, the piston rod 10a of the fourth cylinder 10 has a cylindrical sleeve 19 formed in the hole 3a between the base 3 and the plate 14.
The upper end of the sleeve 19 is connected to the sleeve hole of the split mold 17 by moving the piston rod 10a forward. Further, a plunger 20 having a plunger tip at its upper end is attached to the holder 13, which is integrated with the piston rod 9a of the third cylinder 9, and is engaged in the inner hole of the sleeve 19 so as to be able to move vertically. The plunger 20 is configured to move up and down within the inner hole of the sleeve 19 by advancing and retreating.

With the above configuration, after the powder material is supplied into the sleeve 19 with the piston rods 6a to 10a of each cylinder 6 to 10 retracted from the illustrated position, the piston rod 8a
is moved forward to press the split mold 17 against the plate 14, and by advancing the piston rods 6a, 7a, the upper mold 15 is pressed against the split mold 17 by the pressure block 16, thereby performing mold clamping. After mold clamping, the piston rod 10a is advanced to press the sleeve 19 into contact with the sleeve hole of the split mold 17, and the piston rod 9a is advanced to raise the plunger 20, thereby injecting the material into the cavities of the molds 15, 17. , open the mold and take out the molded product.

Next, the case of extrusion molding will be explained based on FIG. 2. The holder 11 of the first cylinder 6 has a center hole 2.
The piston rod 7a of the second cylinder 7 is fitted with a mandrel 22 which is slidably fitted into the center hole 21a of the stem 21. Furthermore, a cylindrical container 24 that holds a die 23 at its lower end is attached to the holder 12 of the third cylinder 8, and is configured so that the die 23 is pressed against the plate 14 as the piston rod 8b moves forward. . The stem 21 is slidably fitted into the inner hole of the container 24. Furthermore, the fourth cylinder 9
A molded product removal jig 25 formed in an annular shape is attached to the holder 13 . In this case, the fifth cylinder 10 is not used.

With this configuration, after the piston rods 6a to 9a of each cylinder 6 to 9 are moved back from the illustrated position, the piston 8a is advanced to press and fix the die 23 to the plate 14, and then the die 23 is fixed to the plate 14. When the material is supplied to the die 23 and the piston rods 6a and 7a are moved forward to lower the stem 21 and the mandrel 22, the material is transferred to the die 23.
An elongated hollow molded product 26 is extruded. Then, the molded product 26 is cut into a predetermined length using the molded product removal jig 25. After the molding is completed, the piston rods 6a, 7a are raised and the above operation is repeated.

Next, the case of fluid compression molding will be explained based on FIG. 3. The holder 12 of the third cylinder 8 has a mold 2
7 is attached, and is configured to be brought into pressure contact with the plate 14 by advancing the piston rod 8a. The holder 11 of the first cylinder 6 also has an upper mold 2 having a punch hole 28a.
8 is attached, and is configured to be brought into pressure contact with the mold 27 by advancing the piston rod 6a. Furthermore, an upper punch 29 that moves up and down as the piston rod 7a of the second cylinder 7 advances and retreats is fitted into the hole 11a of the holder 11 and tightly fitted into the punch hole 28a of the upper mold 28. . On the other hand, in the holder 13 of the fourth cylinder 9, there is a lower punch 30 that fits into the inner hole of the mold 27, and a protruding rod 3 that engages with the holes 3a and 14a of the base 3 and the plate 14.
1, and the piston rod 9a
The lower punch 30 is configured to move up and down as the lower punch 30 moves forward and backward. In this case, the fifth cylinder 10 is not used.

With this configuration, when the piston rods 6a, 7a of the cylinders 6, 7 are retracted from the illustrated positions, the mold 27 is pressed against the plate 14, and its lower end opening is opened by the lower punch 30. Since the mold is closed, material is supplied into the mold 27, and the piston rod 6a is advanced to clamp the upper mold 28 against the mold 27. Then, when the piston rod 7a is advanced and the upper punch 29 is lowered, the material is fluidized and compacted in the molds 27 and 28, since the molds 27 and 28 are kept airtight by the mold clamping. After the piston rods 6a and 7a are moved back to open the mold, the piston rod 9a is moved forward and the ejection rod 31 is raised to eject the molded product from the mold 27.

Next, to explain the case of press molding based on FIG. 4, the holder 12 of the third cylinder 8 has a mold 32.
is mounted, and is pressed against the plate 14 by the advancement of the piston rod 8a. The holder 11 of the first cylinder 6 also has an upper punch 3 at its lower end.
3 is integrally fixed to the piston rod 6 of the first cylinder 6.
As a moves forward and backward, the upper punch 33 moves up and down to fit into the inner hole of the mold 32 and to move away upward. 2nd cylinder 7
The piston rod 7a is engaged in the hole 11a of the holder 11 by its advancement. On the other hand, in the holder 13 of the fourth cylinder 9, a lower punch 35, which is fitted into the inner hole of the mold 32, is inserted through a pressurizing rod 36 which engages with the holes 3a and 14a of the base 3 and the plate 14. It is installed and piston rod 9
The lower punch 35 is configured to move up and down by moving forward and backward a. In this case, the fifth cylinder 10
is not used.

With this configuration, material is supplied into the mold 32 in a state where the piston rods 6a, 7a of the cylinders 6, 7 are retracted from the illustrated positions, and the piston rods 6a, 7a of the cylinders 6, 7, 9 are
When a, 7a, and 9a are advanced, the material is pressed from above and below by the upper punch 33 and the lower punch 35, and a press-molded product is obtained. Then, the piston rods 6a and 7a are moved back to open the mold, and the pressure rod is raised by the advancement of the piston rod 9a, and the molded product is extruded and taken out.

In this example, four types of molding, injection molding, extrusion molding, fluid consolidation molding, and press molding, are performed by sharing the main parts of the molding machine and selectively installing some molding tools. Although shown, any two or three of these four types of molding may be performed.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, an upper plate is provided above a horizontal member having a center hole penetrating vertically, and an upper plate is provided above the horizontal member having a center hole penetrating vertically. First to third cylinders with downward ends are arranged, and fourth and fifth cylinders with working ends facing upward are arranged below the horizontal member, and a forming tool or mold is attached to the working end of each cylinder. By providing a removable holder, it is possible to share the main parts of one molding machine, such as the frame and fluid pressure cylinder, and to perform two or more molding methods by simply selecting and installing some molding tools. Compared to the conventional method of installing two or more types of molding machines, equipment costs are significantly reduced and installation space is reduced. Costs are reduced.

[Brief explanation of drawings]

1 to 4 are schematic vertical cross-sectional views showing embodiments of the molding machine according to the present invention, respectively.
The figure is a vertical cross-sectional view showing the state in use as an injection molding machine, Figure 2 is a vertical cross-sectional view showing the state in use as an extrusion molding machine, and Figure 3 is a vertical cross-sectional view showing the state in use as a fluid compression molding machine. The top view and FIG. 4 are longitudinal cross-sectional views showing the state in use as a press molding machine. 1...Molding machine, 2...Legs, 3...Base, 5
...Top plate, 6...First cylinder, 6a,
7a, 8a, 9a, 10a...piston rod,
7...Second cylinder, 8...Third cylinder, 9...
...4th cylinder, 10...5th cylinder, 11,
12, 13...Holder, 14...Plate, 15
... Upper mold, 16 ... Pressure block, 17 ...
Split mold, 18... Retaining ring, 19... Sleeve, 20... Plunger, 21... Stem, 22
... Mandrel, 23 ... Dice, 24 ... Container, 25 ... Molded product removal jig, 26 ... Molded product, 27 ... Mold, 28 ... Upper mold, 29 ...
Upper punch, 30...Lower punch, 31...Protruding rod, 32...Mold, 33...Upper punch,
34... Pressure block, 35... Lower punch, 3
6...Pressure rod.

Claims (1)

[Claims] 1. An upper plate 5 is provided above the horizontal member 3 having a center hole 3a penetrating vertically, and the first to third cylinders 6, 7, 8 having working ends facing downward are provided on this plate.
At the same time, fourth and fifth cylinders 9 and 10 with working ends facing upward are arranged below the horizontal member, the second cylinder 7 is positioned on the axis of the center hole, and the second cylinder A first holder 11, which has a hole 11a through which a molding tool held by the molding tool is inserted, is provided at the working end of the first cylinder and holds the molds on the lower side, and the molds located below the first holder. A second holder 12 for holding is provided at the working end of the third cylinder, and a third holder 13 to which a pressure member 20 etc. can be attached and detached is provided at the working end of the fourth cylinder. Machine.