JPH023659B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a product extrusion device for extruding a molded product from a mold in a molding machine such as a die casting machine or an injection molding machine.

[Prior art]

2. Description of the Related Art Conventionally, as an example of this type of product extrusion apparatus, one constructed as shown in FIG. 1 has been known. That is, 1 is a movable mold, 2 is an extrusion plate that is disposed between the movable mold 1 and the movable platen 7 so as to be movable back and forth and is equipped with an extrusion pin 3. The movable mold 1 is inserted into the movable mold 1 to extrude the product inside it. The extrusion plate 2 is connected via an extrusion rod 6 to a relatively large extrusion plate 5 operated by an extrusion cylinder 4 disposed behind the movable platen 7. The extrusion pin 3 set on the extrusion plate 2 is moved by the reciprocating movement of the extrusion plate 5, which is guided and held by a guide rod 9 supported between fixed platens (not shown).

By the way, the extrusion plate 2 on the driven side from the extrusion plate 5 must be replaced quite frequently because the movable mold 1 is replaced when the shape or size of the product is changed, or the extrusion pin 3 is worn out due to long-term use. However, conventionally, the push-out rod 6 on the driven side with respect to the push-out plate 5 is moved to the slide plate 12 as shown in FIGS. 2 and 3.
Since the push-out rod 6 is engaged with a long hole 18 provided in the push-out rod 6 and is attached and detached by sliding the slide plate 12 in the left-right direction in FIG. 3, there are disadvantages as described below.

In other words, although this type of bonding structure is superior in terms of simplicity and speed of attaching and detaching operations,
Since the slide plate 12 is arranged on the rear surface of the extrusion plate 5 to which the cylinder 4 is attached, the head 30 of the extrusion rod 6 must pass through the movable platen 7, the extrusion plate 5, and the slide plate 2. 6 into the elongated hole 18 of the slide plate 12, which is difficult to see behind the movable platen 7, is extremely difficult and the work is complicated. Further, the structure becomes complicated, such as the shape of the extrusion rod 6 having three diameters. In addition, when pushing the push-out rod 6 with the push-out plate 5, it relies on the surface pressure of the stepped portion 25 of the push-out rod 6 that is in contact with the front surface of the push-out plate 5. If an attempt is made to increase the area of this stepped portion 25, the diameters of the central shaft portion 31 and small shaft portion 32 must be reduced, which poses a problem in terms of strength.

In addition, when the extrusion cylinder 4 is directly installed after the extrusion plate 5, the installation area of the extrusion cylinder 4 is quite large, so the slide plate 12 attached to the extrusion plate 5 becomes smaller, which may hinder the installation of the extrusion rod 6. Come.

[Summary of the invention]

The present invention has been made in view of the above-mentioned points, in which a hook member having a hook portion for holding a product extrusion plate is rotatably attached to a member for opening and closing the hook member, and the member for opening and closing the hook member is moved back and forth. To provide a product extrusion device for a molding machine in which a product extrusion bar can be attached and detached extremely easily and reliably by opening and closing a hook member to release and hold a product extrusion plate.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 4 is a sectional view of a product extrusion device according to the present invention;
5 is a sectional view taken along the line of FIG. 4, FIG. 6 is a sectional view taken along the line of FIG. 4, and FIG. 7 is a sectional view taken along the line of FIG. 4. Components in the drawings that are the same as those in FIGS. 1 to 3 are designated by the same reference numerals, and their explanations will be omitted. In these figures, 40 is a product extrusion plate formed by setting a plurality of extrusion pins 3;
Reference numeral 41 denotes a hook member opening/closing member disposed at the rear of the product extrusion plate 40 so as to be movable back and forth, and this opening/closing member 41
is configured to be operated by an opening/closing cylinder 42 when the product extrusion plate 40 is attached or detached. That is, the opening/closing cylinder 42 is fixed to the extrusion plate 5, and its piston rod 42a is passed through the hole 43 of the extrusion plate 5 and the hole of the movable platen 7, and its tip is connected to the center of the back surface of the hook member opening/closing member 41. However, by moving this rod 42a back and forth, the hook member opening/closing member 41 is operated. Each of the four corners of the hook member opening/closing member 41 has a hook portion 45 at the tip end for holding the product extrusion plate.
A total of 4 pieces formed in a letter shape (however, only 2 are shown)
Two hook members 44 are rotatably disposed facing each other, and when the product pressing plate 40 is inserted between these hook members 44, each hook is moved as the opening/closing cylinder 42 is driven. The hook portion 45 of the member 44 engages with the four corner surfaces of the product pressing plate 40 and presses the product pressing plate 4.
0 in cooperation with a pressing member 50, which will be described later. The inner surface of the hook portion 45 and the rear peripheral edge of the product extrusion plate 40 are cut off diagonally to form tapered portions 47 and 48 in order to facilitate attachment of the product extrusion plate 40.

The extrusion plate 5 is guided and held by a guide rod 9 so as to be movable back and forth, and the operating end of the cylinder rod 4a of the extrusion cylinder 4 attached to the extrusion plate 5 is screwed into the movable platen 7. A total of four (however, only two are shown) extrusion rods 6, each of which has one end connected and fixed to the extrusion plate 5, penetrate the movable platen 7 and protrude to the front side of the platen 7, and the extrusion rods 6 are attached to the protruding ends thereof. A member 50 is attached. This extrusion member 50 has a rod 4 in the center.
It is formed in the shape of a rectangular frame with a hole 2a passing through, and the bent portions of the hook member 44 are rotatably connected to the four corners of the frame by connecting pins 51, respectively. Further, on the four corner surfaces of the extrusion member 50, there are pressing parts 52 that abut against the back surface of the hook member opening/closing member 41 and press the opening/closing member 41 when the product extrusion plate 40 is removed, and a pressing part 52 that presses the opening/closing member 41 when the product extrusion plate 40 is removed. stopper portions 5 that abut against the back surfaces of the product extrusion plates 40 and restrict rearward movement of the extrusion plates 40;
3 are integrally protruded.

Note that 55 is a bush, and 56 is a connecting pin that connects one end of each hook member 44 to the hook member opening/closing member 41. Further, in the drawing, the extrusion member 50 is formed into a frame shape and is commonly fixed to each extrusion rod 6, but the extrusion member 50 is not limited to this, and one member may be attached to each extrusion rod 6.

In a product extrusion device having such a configuration, when the movable mold 1 is replaced with the product extrusion plate 40 and the extrusion pin 3 integrated, or when only the extrusion pin 3 is replaced due to wear and tear of the extrusion pin 3, etc. To do this, the hook member opening/closing member 41 is moved forward by the operation of the opening/closing cylinder 42, and the state in which the product extrusion plate 40 is held by the hook member 44 is released. That is,
Working fluid is supplied to one chamber a of the opening/closing cylinder 42 via the switching valve 60, and the piston rod 42
When a is moved forward, the hook member opening/closing member 41 moves forward together with this, so the opening/closing member 41
The hook members 44, which are connected to each other via a connecting pin 56, respectively rotate in the outer direction in FIG.
5 and the product extrusion plate 40 is released. Therefore, at this time, if the movable mold 1 is removed from the movable platen 1, the product extrusion plate 40 can be easily extracted from between the hook members 44. On the other hand, when installing the mold, the rod 42a of the opening/closing cylinder 42 is
are left free or the hook members 44 are opened by driving the cylinder 42, and then the product extrusion plate 40 is installed between the hook members 44. At this time, if the rod 42a is left free, the product extrusion plate 40 is inserted along the tapered part 47 of the hook part 45, the hook member 44 is opened, and the hook member 44 is opened.
It is possible to attach the product extrusion plate 40 between the two. After this installation, when the switching valve 60 is switched to supply working fluid to the other chamber b of the opening/closing cylinder 42, the piston rod 42a retreats, and the hook member opening/closing member 41 also retreats together with it, as described above. Conversely, the hook member 44 is rotated counterclockwise and clockwise. As a result, the hook portion 45 of each hook member 44
engages with the end surface of the product extrusion plate 40, and the product extrusion plate 40 is held between the hook portion 45 and the stopper portion 53 of the extrusion member 50. FIG. 4 shows this state.

On the other hand, when extruding the product in the movable mold 1 with the extrusion pin 3, the extrusion cylinder 4 is driven to move the extrusion plate 5 forward. At this time, the opening/closing cylinder 42
The piston rod 42a is located on the right side in FIG. 4, and maintains the state in which the product extrusion plate 40 is held by the hook member 44. When the extrusion cylinder 4 operates, the extrusion plate 5 moves forward, so that the pressing member 50 attached to it through the extrusion rod 6 also moves forward, and its pressing part 52 and stopper part 53 move against the hook member opening/closing member 41. and the product extrusion plate 40 to simultaneously move them forward. Therefore, at this time, the hook member 44 does not rotate to release the product pushing plate 40 from its holding state. On the other hand, when the product extrusion plate 40 advances, the extrusion pin 3 also advances integrally to extrude the product in the movable mold 1.

In the above embodiment, four hook members 44 are used to release and hold the product extrusion plate 40, but the number is not limited to four and may be increased or decreased depending on the size of the product extrusion plate 40, etc. It is something. however,
Two or more are required.

〔Effect of the invention〕

As described above, the product extrusion device for a molding machine according to the present invention is configured so that the product extrusion plate is released and held by the hook member, which is opened and closed by the forward and backward movement of the hook member opening and closing member. The attachment and removal operations of the product extrusion plate are simple and easy, and the product extrusion plate can be held securely. In addition, the structure is simple, there are no parts where the strength decreases, and it is safe.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of a conventional product extrusion device, FIG. 2 is an enlarged view of the part in FIG. 1, FIG. 3 is a side view of FIG. 2, and FIG. 5 is a sectional view taken along the line of FIG. 4, FIG. 6 is a sectional view taken along the line of FIG. 4, and FIG. 7 is a sectional view taken along the line of FIG. 4. 1...Movable mold, 3...Extrusion pin, 5...Extrusion plate, 6...Extrusion rod, 40...Product extrusion plate, 41...
...Hook member opening/closing member, 44...Hook member, 45...
Hook portion, 47, 48... Taper portion, 50... Extrusion member.

Claims (1)

[Claims] 1. A hook member having a hook portion at the tip for holding a product extrusion plate is rotatably attached to an extrusion member that can move forward and backward, and the product extrusion plate is attached to the inner surface of the hook portion and the rear peripheral edge of the product extrusion plate. Tapered portions are provided for easy mounting, and the other end of the hook member is rotatably connected to a member for opening and closing the hook member that can move forward and backward, and the product extrusion plate is released and closed by opening and closing the hook member. A product extrusion device for a molding machine characterized by holding the product.