JPS61102218A - Bolster positioning device of vertical molder - Google Patents

Abstract

PURPOSE:To very accurately and easily position a bolster by a structure wherein the titled device is composed of a driving device to move the bolster backward and forward, a detachable U-shaped member and a fitting member to fit to the U-shaped member and a pusher, which moves on a movable head back and forth, is provided. CONSTITUTION:A bolster drawing-out carriage 12 is so constituted as to run throughout nearly the whole length of a rail 11 by moving the piston rod 15 of an hydraulic cylinder back and forth through the feeding of oil from an oil pressure apparatus. The pusher 28a of a stopper frame 28 is separated from the protruding stripes 23 of a bolster 18. Simultaneous with the stoppage of the bolster 18 at the temporary stop position, hydraulic cylinders arranged on both the sides of the titled molder are put into actuation so as to move piston rods 27 forward in order to move the pusher 28a forward by means of the link motion of the stopper frame 28, resulting in pushing the protruding stripes 23 so as to move the bolster 18 forward to its normal stop position in order to precisely position the bolster 18 by pinching with the pushers 28a on both sides.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention applies to vertical molding machines such as compression molding machines, injection molding machines, and die-casting machines that have a vertical pressure operation direction, in which a mold is attached and pressure is applied. The present invention relates to a bolster positioning device for a vertical molding machine that positions a bolster that is taken in and out of the machine to a pressurizing part.

[Conventional technology]

Plastic molding machines such as injection molding machines and compression molding machines, and molding machines such as die casting machines for metal casting, are divided into vertical molding machines and horizontal molding machines depending on whether the pressure operation direction is vertical or horizontal. There are two types of vertical molding machines: vertical molding machines that move a lower mold up and down relative to a fixed upper mold to clamp and open the mold, and vertical molding machines that use a fixed lower mold to close and open the mold. On the other hand, there is a method in which the upper mold is raised and lowered to clamp and open the mold.

The large vertical molding machine is equipped with a bolster that is larger than the mold and can move freely in the horizontal direction. During molding, the lower mold is fixed to this bolster and is inserted directly under the upper mold. Mold clamping is performed by raising the bolster hydraulically or by lowering the upper mold. In addition, a compression molding machine fills powdered resin into the lower mold and performs pressure molding, and this type of molding machine is equipped with two sets of bolsters, and a spare bolster mold is used during the molding operation. This is done by filling the container with resin.

The bolster that secures the mold in this way and enters the pressurizing section is generally connected to a pull-out wheel that is driven by a hydraulic cylinder to move forward and backward, and in many cases moves by shifting the wheels. After stopping on the movable platen, it rises together with the movable platen and clamps the mold between the lower mold on the bolster and the upper mold on the fixed platen.

Molding is performed. The bolster, which has stopped on the movable platen in this way, continues to rise and clamps the mold, so it is necessary to accurately position and stop the bolster at the stop position.

Conventionally, a stopper was installed to regulate the movement limit, but
Since a general stopper cannot be used in the above-mentioned device having two sets of bolsters on both sides, a limit switch is provided for positioning.

[Problem that the invention seeks to solve]

However, in such a conventional bolster positioning device, it is difficult to perform positioning by combining the stroke regulation of the hydraulic cylinder and the regulation by the limit switch, and the positioning cannot be performed accurately or is time consuming. .

Therefore, in a compression molding machine, the upper mold is stacked on top of the lower mold at the resin filling position, and then the mold is inserted into the pressurizing section to perform molding. In order to align the upper molds, the upper mold must be lifted and placed on the crane, which not only takes a long time and lacks safety, but also requires two sets of upper molds, which increases costs. was there.

[Means for solving problems]

In order to solve such problems, in the present invention, the connecting member between the drive device for advancing and retracting the bolster and the bolster is fitted with a U-shaped member that can be attached and detached in the vertical direction and has a clearance in the direction of advancing and retreating the bolster. A pusher is provided, which moves forward and backward to push the bolster, which is stopped in front of a predetermined position on the movable platen. .

[Effect]

With this configuration, if the drive device is stopped when the bolster reaches a predetermined position, the bolster will stop with the play in the connecting member biased toward the drive device, so the drive means can continue to push the pusher. When it is moved forward, the bolster is positioned at a predetermined position and stops, and the play in the connecting member is divided between the drive device side and the movable platen side, making it easy to attach and detach.

〔Example〕

Fig. 1 to Fig. 6 show an embodiment of the bolster positioning device according to the present invention, Fig. 1 is a plan view of a compression molding machine to the west of the bolster in which this device is implemented, Fig. 2 is a front view of the same, and Fig. 3 is a front view of the same. is a front view of the positioning device, FIG. 4 is a diagram explaining the operation,
FIG. 5 is a front view of the compression molding machine, and FIG. 6 is a plan view thereof. In the figure, a molding machine body, generally designated by reference numeral 2, is erected on a step provided in a pit 1 under the floor surface, with a main ram 3 at its lower end inserted into a hole in the pit 1. The molding machine main body 2 is formed of a cylinder platen 4 that supports a main ram 3, a top platen 5 at the top, and a pair of front and rear side plates 6 that vertically connect these platens 4.5.

A pair of side cylinders 4 = cylinders 7 are arranged on both the left and right sides of the main ram 3, and these main ram 3, side cylinders T, and other hydraulic cylinders to be described later,
Oil is supplied by a hydraulic device 8 disposed within the pit 1.

As shown in detail in FIG. 1, the reference numeral 9 is a moving platen that is slidably supported by side plates 6 at its four corners and has a square shape in plan view.
It is connected to a piston rond between the main ram 3 and the side plate 6, and is configured to be raised and lowered at low speed by the main ram 3 having a large output, and raised and lowered at high speed by a side cylinder 7 having a small output. A portion of the configuration of the moving platen 8 will be described in detail.

On the other hand, a rail stand 1 is placed directly above the floor on both the left and right sides of the molding machine main body 2.
Between each rail stand 10 and the molding machine main body 2, there are two rails 11 on the front and back so that the top surface is on the same plane as the moving platen 9 in the lowered position. It is supported at a height of Reference numeral 12 denotes a framework-shaped bolster pull-out car that is arranged one set on each of the left and right rails 11, and has four wheels 13 that roll on the rails 11.
In the center of the truck, there is a piston rod 1 of a hydraulic cylinder 14 supported on the floor via a bracket.
The working ends of 5 are connected via a bracket 16. By moving the piston rod 15 of the hydraulic cylinder 14 forward and backward using oil supplied from the hydraulic system 8, the bolster pull-out wheel 12 is configured to run over the entire length of the rail 11. From the front end surface of the bolster drawer wheel 12, a pair of tongue pins 1T as connecting fittings having a flange 17m project horizontally toward a bolster 18, which will be described below.

The reference numeral 18 is a bolster that is connected to the bolster pull-out car 12 and runs integrally with it between the center of the rail 11 and directly above the moving platen 9, and is not the same as the moving platen 9. It is formed into a square shape with dimensions: P drawer wheel 12 side 0
A one-to-zero connecting fitting 19 is provided protruding from the end surface in correspondence with the docking pin IT.

The connecting fitting 19 is formed in an inverted U-shape that opens downward when viewed from the front, and a U-shaped groove 19m that opens downward is provided in the member on the pull-out wheel 12 side. A docking pin 1T is attached to the inverted U-shaped portion of the connecting fitting 19 when viewed from the front.
The small diameter portion 17b of the docking pin 17 is engaged in the U-shaped groove 191, and the connecting fitting 19 is formed to be detachable in the vertical direction with respect to the docking pin 1T. has been done. A clearance of, for example, about 30 m/2 is provided between the connecting fitting 19 and the collar 17&, which is indicated by the symbol t1 in FIG. 4(1). The four bearings integrally formed on the lower surface of the bolster 18 connected in this manner support the wheels 2o at the same intervals as the bolster pull-out wheel 120 and the wheels 13.
The end immediately below the 0th lap is, for example, 15 m from the bottom surface of the bolster 18.
/m, and the lower surface of the bolster 18 is floating above the upper surface of the rail 11 and the moving platen 7f, which are the traveling distances 4'.

Reference numeral 21 denotes a pair of rails buried in the upper surface of the bolster 18 so as to be flush with the upper surface of the bolster 18.
The wheels are also made of a hard material and are arranged in parallel with the wheels 20 at the same spacing. Further, a guide groove 22 having a V-shaped cross section is provided on the upper surface of the moving platen 9 and extends left and right in the center between the rails 21. 23 is engaged with this guide groove 22, the movement of the bolster 1B on the moving platen B is guided, and the bolster 1B is positioned in the front-rear direction when stopped. Note that a clearance of, for example, several m/m is provided between the protrusion 23 and the guide groove 22.

Next, a device for positioning the bolster 1B in the left-right direction, which stops on the moving platen 9, will be explained. The moving platen 9, which is the working surface of the side cylinder 7 shown in FIG. 2, is fixed to the left and right protruding brackets 24 (in FIGS. 1 and 2, only one side is shown and the other side is omitted). A hydraulic cylinder 26 is pivotally attached to the cylinder bracket 25, and the working end of a piston rod 27 that moves diagonally upward and back is formed into a U-shape in plan view and holds the hydraulic cylinder 26 therebetween. The stopper frame 2B is pivotally connected to the stopper frame 2B by hinges 29 extending diagonally downward. A bracket 24 is attached to the stopper frame 28.
One end of a pair of links 30 is pivotally connected to the other end of the pair of links 30, and as the piston rod 27 moves back and forth, the four-bar link movement between the stopper frame 2B and the link 30 and the movement of the hydraulic cylinder 26 are caused. A pusher 28m integrally formed on the upper end of the stopper frame 28 by combining the oscillations
The vertical suppressing surface of is located diagonally in the vertical direction between the position away from the bolster 18 shown in FIG. 4 (-) and the position pressing the protrusion 23 of the bolster 18 shown in FIGS. It is configured to move forward and backward. Then, the bolster 18 connected to the bolster pull-out car 12 and moving onto the moving platen 9 stops, for example, 15 m/m before the normal stopping position shown in FIG. 4 (,) by stopping the hydraulic cylinder 14. The pusher 281 is spaced apart from the protrusion 23, and the clearance 1. is biased towards the drawer car 12 side. In this state, the hydraulic cylinder 26 continues to operate to move the pusher 2B& diagonally upward, pushing the protrusion 23 by 15 m/m, for example, to move the bolster 18 to the normal stop position and stop it there.

At this time, since the docking bin 1T is stopped, the clearance t1 between the connecting fitting 19 and the collar 17& is distributed, for example, by 15a+/m on both sides of the collar 1710, and is indicated by the symbol tm in FIGS. 3 and 4(b). It becomes the play space shown.

A lower mold is fixed in advance to the bolster 18, which is moved forward and backward and positioned in this manner, in the retracted position shown on the right side of FIGS. 5 and 6. That is, the bolster 18
On the top surface, four rectangular grooves 31 extend from the center of the rectangular can side toward the center, and inside each groove 31,
The positioning fitting 32 is accurately positioned and protrudes. On the other hand, the lower mold shown with reference numeral 33 in FIG. After being positioned by engaging the positioning metal fittings 32 in the vertical grooves 33d provided at the center of each side, it is fixed to the bolster 1B with a plurality of bolts. In the case of this embodiment, the lower mold 33 is filled with a ladder 34 made of, for example, polytetrafluoroethylene resin. 35 is a T-groove for fixing a lower mold of a different size. An upper mold 36 is fixed to the lower surface of the top platen 5 facing the lower mold 33, and by raising the lower mold 33, the upper mold 36 is moved into the outer frame 321 of the lower mold 33. The Teflon powder 34 is press-fitted into the bottom plate 33b and compression-molded between the Teflon powder 34 and the bottom plate 33b.

In addition, in order to easily and accurately fit the two molds 33 and 36, the 1 gold 1i136 is divided into a lower member and a lower member, and the lower member is suspended from the upper member with hanging bolts and horizontally moved in each direction. It is designed to be able to move in small amounts.

The moving pulley 9 that stops the bolster 18 at a predetermined position has a circular hole 3T that passes through the top and bottom thereof and is located directly below the wheel 20 of the bolster 1B that stops at the forming position, and each circular hole 3T An elevating iron 38 is supported in the interior so as to be movable up and down. The lifting rods 3B are seated together with the bolster 18 to support the wheels 20, and the lower surface of the bolster 18 is floating above the upper surface of the moving platen 9, but when the moving platen 9 is raised, , the elevating iron 3B lowers slightly due to its own weight, and the wheel 20 enters the circular hole 37.
The movable platen 9 and the bolster 1B are buried in the interior and are configured to rise integrally in a state in which they are in close contact with each other.

The moving platen 8, which has risen in this way and finished mold clamping and molding, is lowered by the drive of the side cylinder 7 and is seated on the upper surface of the cylinder platen 4. At this time, the docking bin 1T is moved back to its original position. This is engaged with the connecting fitting 19 of the bolster 1B, and the bolster 18
and the bolster pull-out wheel 12 are connected to each other. Then, as shown in FIG. 5, the bolster 18 is pulled out to the center of the rail 11 by the bolster pull-out wheel 12, but there is a lower mold 3 at the same position on the opposite side from this position.
A knocking device 39 for pushing out the molded products in each of the molded parts 3 is provided. This knocking device 39 is composed of a hydraulic cylinder 40, a knocking frame 42 fixed to the working end of a piston rod 410, and push rods 43 erected at the four corners of the knocking frame 42, and the bolster 1B includes: A hole 44 into which a push rod 43 is inserted is bored. When the piston rod 41 moves forward, the extrusion rod 43 protrudes from the hole 44 via the knocking frame 42 and extrudes the molded product together with the bottom plate 33b of the lower mold 33.

The operation of the compression molding machine configured as above will be explained.

Prior to the molding operation, place the lower mold 33 from directly above on the bolster 18 located on the right side in Figures 5 and 6, hold it down from four sides with the positioning fittings 32 to position it, and then tighten the four corners with bolts. Fix it to the bolster 18 with. After filling the lower mold 33 with powder 34 of, for example, polytetrafluoroethylene resin, when the piston rod 15 of the hydraulic cylinder 14 is moved forward, the bolster pull-out wheel 12 and the bolster 1B connected thereto are moved between the wheels 13. 20 is rolled and moved forward, and the bolster 1B enters onto the moving platen 9 without being guided by the engagement between the projections 23 and the guide grooves 22.

When the bolster 18 reaches, for example, 15 m/m before the normal stop position, the hydraulic cylinder 14 stops and the bolster 1B stops. At this time, the flange 17 of the knocking bin 17 is pushing the connecting fitting 19, so as shown in FIG. ), the play gap 1 is biased toward the pull-out wheel 12. Further, it is spaced apart from the protrusion 23 of the pusher 2Ba&f bolster 1B of the stopper frame 2B. At the same time as the bolster 1B stops at the temporary stop position, the hydraulic cylinders 26 on both sides operate and the piston rod 2T moves forward, so the stopper frame 2
Due to the link movement of 8, the pusher 28m is
) from the position shown in FIG. 4(b) to the position shown in FIG. In this way, the position can be accurately determined. During this extrusion of 15 m/m, the bolster pull-out wheel 12 is stopped and the docking bin 11 at the connecting part with the bolster 18 is stopped, so the 30 m/m The clearance t of m is 15xm on both sides of the tsuba 100 as shown by the symbol t.
Divided into 9 parts by /m. When entering Bolster 1B,
Since the elevating rod 38 is seated and its upper end surface is flush with the upper surface of the moving platen 9, that is, the upper surface of the rail 21, it runs smoothly and the wheels 20 are supported by the elevating rod 3B and stopped. .

Therefore, by operating the side cylinder 7, the placket 24
When the moving platen 9 is raised through the lifting rod 3B, the lifting rod 3B is slightly lowered until the lowering is restricted by the step, so that the wheel 20 falls into the circular hole 3T, and the moving platen 9 and the bolster 18 are brought into close contact with each other. rise in unison. When the lower mold 33 comes into contact with the upper mold 36 due to rising, if both molds 33 and 36 are misaligned, the upper mold 3
Since the lower part of No. 6 is suspended by the hanging bolt, it moves slightly in the horizontal direction to determine its position.
) When the lower mold 33 is fitted with the mold 33 and further raised, the Teflon powder 34 is applied to the upper mold 36 and the lower mold 33.
The bottom plate 33b is compression molded.

Note that during the movement of the moving platen 9, the main ram 3 is switched to a high output, low speed main ram 3.

After molding, when the moving platen 9 is lowered, it seats on the cylinder platen 4 and stops, and the lifting rod 38 also seats and raises the wheel 20 with its upper end surface, so that the bolster 18 floats up from the moving platen 9. At this time,
Since the docking pin 17 of the bolster pull-out wheel 12 is waiting at the original position, the connecting fitting 19 of the descending bolster 18 engages with the collar 17& of the docking pin 17, but as mentioned above, it is not connected to the collar 17m. Play gap 1S with metal fitting 19
are distributed, for example, by 15 m/m on both sides of the flange 17&, so that there is no interference between the flange 17a and the connecting fitting 19.
Cannot be damaged. The bolster 18 and the bolster pull-out wheel 12 are now automatically connected, so when the hydraulic cylinder 14 is operated to pull out the bolster 18 above the knocking device 39 and the hydraulic cylinder 40 is operated, the knocking frame 42 is connected. The extrusion rod 43 protrudes into the bolster 18 and pushes out the bottom plate 33a, so that the molded product can be taken out of the mold.

This ends the molding cycle, but during this molding cycle, the lower mold 33 on the opposite bolster 1B is filled with resin, and during the knocking operation of the molded bolster 1B, the opposite bolster 18 enters and molds. work is done. After this, the forming operation is repeated by moving the bolsters 18 on both sides back and forth alternately.

In this example, the present invention was applied to a compression molding machine and showed overwhelming results, but if the upper mold is fixed and the lower mold is fixed to a movable platen via a bolster and moves up and down, it will work. , it can be similarly applied to vertical molding machines such as injection molding machines and die-casting machines.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, in the bolster positioning device for a vertical molding machine, the connecting member between the drive device for advancing and retracting the bolster and the bolster is connected in the vertical direction including play in the direction of advancing and retracting the bolster. A pusher is provided which is driven by a drive means and advances and retreats as if pushing the bolster, and temporarily stops the bolster before a predetermined position on the movable platen. By configuring it so that it is positioned by pushing it to a predetermined position with a pusher, the bolster can be positioned extremely accurately and easily even in a vertical molding machine that has two sets of bolsters, ensuring good positioning accuracy every time. As a result, the upper mold and lower mold can be clamped above the movable platen, and the work time is significantly reduced compared to conventional equipment that joins both molds at the knocking position. This improves work efficiency, improves safety, and reduces costs by requiring only one upper mold. In addition, since the connecting fitting between the bolster and its driving device side is attached and detached with mutual play distributed between both sides when the bolster is raised and lowered, attachment and detachment are easy and the connecting fittings do not wear out.

Damage is reduced and its durability is increased.

[Brief explanation of the drawing]

1 to 6 show an embodiment of the bolster positioning device for a vertical molding machine according to the present invention, FIG. 1 is a plan view of the vicinity of the bolster of a compression molding machine equipped with this device, and FIG. 3 is a front view of the positioning device, FIG. 4 is an explanatory view of the operation, FIG. 5 is a front view of the compression molding machine, and FIG. 6 is a plan view. 9... Moving platen, 12... Fist bolster drawer, 14... Φ hydraulic cylinder, 1T... Dotting bin, tram... Tsuba, 18 Fighting... Bolster, 19... Consolidated money x. 20... Hydraulic cylinder, 28... Stotuberin/, 28a... Pusher, jlsF... Play.

Claims (1)

[Claims] In a vertical molding machine equipped with a bolster that is removably connected to the driving device side by a connecting member and enters a predetermined position on the movable platen, the connecting member between the driving device side and the bolster side is connected to the bolster by moving the bolster forward and backward. The U-shaped member is formed by a vertically removable U-shaped member having a play in the vertical direction, and a fitting member therebetween, and the bolster is driven by a driving means and stopped slightly before the predetermined position, until the bolster is moved to the predetermined position. A bolster positioning device for a vertical molding machine, characterized by being provided with a pusher that moves forward and backward in a pushing manner.