JPS63212456A - Mold inner-surface grinder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Field of Application in Industry] The present invention relates to a mold inner surface polishing machine for polishing the inner surface of a mold defining a cavity for molding a raw material of an object to be manufactured. .

[Prior Art] This type of mold internal polishing machine, which can polish the internal surface by rotating the mold through a compatible material, is disclosed in French Patent No. 76-1 by the applicant of the present application. 15
, No. 116 (publication number 2°350.924).

This mold inner surface polishing machine includes a frame that supports a horizontal plate that can be driven in the vertical direction, and a motor for rotationally driving a rotary bearing is mounted on this horizontal plate. This rotary bearing supports the crankcase of the electric motor in the vertical axis via the pivot axis in the horizontal direction. This electric motor is
It is pivotally moved on the above-mentioned swing axis via an offset means provided in the crankcase. The output shaft of this motor is equipped with a spindle that supports an operating member, and this operating member rotates itself while the mold inner polishing machine is operating.
It will be subject to planetary deflection as well as vertical deflection.

The conventional mold internal polishing machine described above is thus able to follow and adapt to the numerous rotating contours of the rotating body against which the actuating member is applied, and in practice produces good quality results. This is something that can be obtained.

[Problems to be solved by the invention]However, in this conventional mold inner surface polishing machine,
Associated with its construction, it has several drawbacks.

That is, this mold internal polishing machine operates in an environment containing a high concentration of powder generated when polishing a mold. On the other hand, the rotation of the electric motor's crankcase is
If the crankcase is driven by a rotary bearing, this requires the use of a special electric motor with an external slip ring.

In addition, the unavoidable drawback of this type of motor is the danger of fire, which requires extensive protection and periodic repairs to maintain the motor in good working condition. This is the result.

Further, the offset means is constituted by a plate member, and this plate member cooperates with the core portion of the clamp member supported by the rotary bearing via two return springs and rollers, and the plate member cooperates with the core portion of the clamp member supported by the rotary bearing. The actuation of the spring on the branch will cause, via the roller, a pivoting movement of the armature on the pivot axis.

Such orsetting means are formed by assemblies of many parts, are fairly heavy, and require strong return springs.

These various requirements limit the sensitivity of the mold internal polishing machine, and when polishing the internal surface of a mold cavity where the external shape has suddenly changed, stable polishing operation is required. A problem will arise in which it will no longer be possible to do so.

Furthermore, as a result of the relative positioning of the elements making up the offset means, the degree of pivoting along the radial direction will be limited.

This invention was made in view of the above-mentioned problems, and an object of the invention is to provide a mold inner surface polishing machine that uses an electric motor and can easily control the pivoting state of the electric motor. It is to be.

Another object of the present invention is to provide a mold inner polishing disk having high sensitivity and high amplitude along the radial direction to cope with sudden changes in the mold cavity.

Furthermore, another object of the present invention is to provide a simple and inexpensive mold inner surface polisher.

[Means for Solving the Problems] In order to solve the above-mentioned problems and achieve the purpose, the operating head of the mold internal polishing machine according to the present invention is supported by a swing shaft of a pulley that crosses concentrically. , a tubular sleeve with a bearing for support and rotation therein; a tubular extension of the crankcase of the electric motor, which is placed concentrically on the bearing of the sleeve; A fixing means for fixing the sleeve in an angular state; and a biasing means supported by the pulley and elastically biasing the sleeve to pivot about the swing axis. It is characterized by

[Example] Hereinafter, the structure of an example of the mold inner surface polishing machine according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a mold inner surface polishing disk for polishing the inner surface E of the mold M by rotating the mold M. Here, from this mold M, the raw material of the object to be manufactured is molded.

As is well known, this mold internal polishing machine includes a frame 1 equipped with an upper table 2 for supporting a mold M, and a guide means 3 for vertically moving and guiding a plate member 4. There is. This guide means 3 is composed of, for example, a jack 3A coupled to a guide rail 3B.

This plate member 4 is movable up and down, and serves as a mechanism for rotationally driving a bell pulley 7, which is attached to the inside of a cylindrical bearing 8 formed on an overhanging portion of the plate member 4, via a belt 6. I support 5. This cylindrical bearing 8 enables support and centering of the tubular hub 10 of the bell pulley 7, as shown in FIG. 2, via a ball bearing, ie, a thrust bearing 9.

The above-mentioned bell pulley 7 supports an actuating head 11 which is mounted with degrees of freedom relative to the hub 10. As shown, for example, the degree of freedom between the hub 10 and the head 11 is determined by the pivot axis X-X' in the general direction parallel to the upper table 2, i.e. in the vertical driving direction of the plate member It is defined by a swing axis x-x' that is perpendicular to . This swing axis xx' is achieved by two check screws 12 attached to the hub 10 and arranged diametrically opposed to each other.

These check screws 12 fit into conical recesses 13 formed in the sleeve 140 surface on the tube of the actuating head 11. In this way, this working head 11 is engaged and centered in the central space formed in the bell pulley 7,
In addition, regarding this bell pulley 7, the operating gear 11 is as follows:
As shown in FIG. 1, it can swing along the direction of arrow f1 on both sides of a vertical plane P that crosses the swing axis xx'.

In addition to a sleeve 14 disposed coaxially with the bell pulley 7, the operating head 11 includes an electric motor 15 and an urging force for urging the operating head 11 to rotate around the swing axis x-x'. means 16.

The sleeve 14 described above includes a bearing 17 therein for rotatably supporting an extension 18 on the tube of the crankcase 19 of the electric motor 15 . This extending portion 18 is connected to the crankcase 1 by a screw 20.
9 and is set coaxially with the sleeve 14, and its position in the vertical direction is fixed by a nut 21.

In this way, the extension part 18 and therefore the crankcase 19 is connected to the sleeve 14 driven by the bell pulley 7.
It will be subjected to the rotational moment caused by. In order to cancel this rotational moment, the extending portion 18 or the crankcase 19 is connected to the fixing means 22.
Thus, it is fixed to the sleeve 14 at a predetermined angle.

As is clear from FIG. 1, the fixing means 22 comprises, for example, a finger 23 fixed to the plate member 4 and a fork 24 fixed to the crankcase 19.

The electric motor 15 described above includes an output shaft 25 extending from a spindle 26. This spindle 26
is fixed to the output shaft 25 via a plurality of grooves 27, for example. At its lower end facing the upper table 2, this spindle 26 has an actuating member 2, such as a milling cutter.
It is equipped with 8.

Here, it is characteristic in this embodiment that the above-mentioned spindle 26 is guided by roller bearings 29 in such a way that it can resist bending stresses.

20 A roller bearing 29 is disposed within the extension 18 and shouldered, and is held in position by a nut 30. Then, the di 1 India 31 extends from the extending portion 18
This joint 31 is provided primarily for firmly fixing the roller bearing 29.

Also, the biasing means 16 for allowing pivoting of the working head 11 about the pivot axis xx' are shown in detail in FIGS. 3 and 4.

The biasing means 16 includes a support member having a pair of laterally spaced apart cheeks 40 . These cheeks 40 extend along the vertical direction, and are each fixed to the bell pulley 7 via a base 41 with a screw 42.

A knuckle joint 43 is provided in the free space defined between the pair of cheeks 40.

This knuckle joint 43 consists of an elastic branch 44 articulated on a pressure lever 45 . This elastic branch 44 is secured by a locking member 46 supported by a socket 47 fixed to both cheeks 40.
axially held.

On the other hand, the above-mentioned locking member 46
4 is allowed to pivot in a plane substantially perpendicular to the direction of the swing axis x-x', and the force exerted by this elastic branch 44 is controlled. For this reason, the locking member 46 is composed of, for example, a screw with a sharp tip that cooperates with the conical recess 47a. The recess 47a is open at a large angle in the center and is formed on the upper surface of the upper portion of the shoulder ring 48. This shoulder ring 48 is provided to support one end of a resilient return means 49, such as a compression coil spring. Further, the other end of this compression coil spring 49 is in contact with a shoulder piece 50. This shoulder piece 50 is extended around the pivot pin 52 by a two-wooden core portion 51 articulated to the upper part of the pressure lever 45.

Here, as a characteristic feature of this embodiment, in order to prevent any deformation of the compression coil spring 49, the shoulder ring 48 and the shoulder piece 50 are joined by a continuous connection. There is. This connection includes, for example, a pin 53 fixed to a shoulder piece 50, and this shoulder piece 50 is inserted into at least the blind hole 4 opened in the lower part of the shoulder ring 48. It is partially inserted so that it can be inserted and removed freely.

On the other hand, the above-mentioned pressure lever 45 is supported by both cheeks 40 and is rotatably jointed by a pivot pin 55 that constitutes a support member, and this pivot pin 55 is connected to the pivot shaft x.
- It is set to extend in a direction substantially parallel to x'. This pivot pin 55 is spaced apart from the above-mentioned pivot pin 52 by a predetermined distance that depends on a predetermined angular width that is the swing range of the spindle 26 . In addition, this pressure lever 45
has a longitudinal body with a transfer track 56 made of a curved surface at its lower part. This transfer track 56 is configured to cooperate with a roller 57 attached to a pin 58 supported by a core portion 59 of a yoke 60, which is connected to the flange portion of the sleeve 14 mentioned above.
3 through a shoulder piece 61.

The operation of the mold inner surface polishing machine configured as described above will be explained below.

First, the operating head 11 is made swingable around a swing axis xx'. This operating head 11 has rollers 57
and the pressure lever 45, the sleeve 14. It is biased to pivot by biasing means 16 acting on it. Appropriate control of this biasing means 16 will cause a pivoting of the pressure lever 45 which, under the elastic force of the spring, causes a pivoting of the sleeve 14 about the pivot axis x-x'. .

As a result, the working head 11 assumes an inclined rest position, as shown in FIG.

Note that in this rest position, the milling cutter 28 as an operating member is located outside the plane P.

Here, when the electric motor 15 starts, the milling cutter 28 starts rotating around its own axis, for example, as shown in FIG. 5, without changing the above-mentioned rest position.
It will rotate along the direction indicated by arrow f2.

On the other hand, at the same time as the above-mentioned electric power switch 15 starts, this 1! The rotary motor 15 will move the bell pulley 7 via the belt 6. Here, this bell pulley 7 is
By the biasing means 16 acting perpendicularly to the swing axis x-x',
In particular, the driving force is transmitted to the sleeve 14, which is constantly biased to pivot about the swing axis x-x', through the pressure lever 45 that is in pressure contact with the roller 57 of the sleeve 14. are connected so that As a result, the rolling contact portion between the pressure lever 45 and the roller 57 is
It is subjected to a combined operation of zero rotation and pivoting around the rocking axis x-x', and moves along a planetary trajectory. Here, the crank case 1 of the electric motor 15 described above
9 is fixed with respect to the rotational direction by the fixing means 22, so that it follows a similar trajectory while being fixed thereto. Further, the milling cutter 28 is subjected to planetary bias according to the circumference C while rotating around its own axis.

Here, the trajectory C of the planetary swivel of the milling cutter 28, depending on the initial adjustment of the force exerted by the pressure lever 45 on the roller 57, causes the abutment of the working head 11 about the pivot axis X-X' It is defined by location. On the other hand, this contact position is achieved by the action of the spring 49.
On the other hand, the spindle 26 on both sides of the oscillating axis x-x'
This is maintained by the rotational speed of the bell pulley 7, which generates a centrifugal force acting on both the motor and the working head 11.

In this way, in the above-mentioned rest position, the spindle 26 is introduced into the mold M, which has a maximum diameter set smaller than the planetary rotation diameter C of the milling cutter 28. Become. When the mold inner surface polishing machine is started, the milling cutter 28 is loaded with a spring 49 and receives a force greater than the generated centrifugal force, and comes into contact with the peripheral wall of the cavity E. It will be brought like this.

Additionally, the planetary pivoting and simultaneous rotation of the milling cutter 28 results in machining of a portion of the pivoting surface of the mold cavity E that corresponds to the horizontal plane across which the milling cutter 28 traverses.

The guide means 3 are then controlled to drive the working plane of the milling cutter 28 in order to machine the entire turning surface of the mold cavity E.

Here, if the cross-sectional shape of the turning surface of the cavity E changes, the pivot angle around the swing/swing axis x-x' will change in accordance with this change. That is, a reduction in the cross-sectional shape in the cavity E results in a reduction in the pivot angle, such that as the pivot angle decreases, it faces a greater resistance, as shown in FIGS. 6 and 7. The pressure lever 45 will rise against the action of the spring 49. On the other hand, an increase in the cross-sectional shape of the cavity E results in an increase in the pivot angle,
The pressure lever 45 will be pulled down. Through such operation, the elastic branch 44 moves the locking member 4 in a plane substantially perpendicular to the extending direction of the swing axis x-x'.
It will pivot about the point of contact with 6.

Furthermore, as shown in FIG. 7, the arrangement given to the biasing means 16 to drive the working head 1 in a pivoting manner allows the spindle 26 to
In particular, it makes it possible to easily traverse the plane P in order to machine the bottom of the mold cavity E.

It goes without saying that this invention is not limited to the configuration of the one embodiment described above, and can be modified in various ways without departing from the gist of the invention.

[Effects of the Invention] As detailed above, the mold inner surface polishing machine according to the present invention has horizontal plates (4
) and a frame (1) equipped with a motor (M) for rotationally driving a rotary bearing (7) constituted by an annular pulley; A swing axis with a direction (X-X'
), the operating head (11) is permanently attached to the operating head (11) supported by the pulley (7) so as to pivot about the pivot axis (X-X'). an electric motor (15) having a generally vertical axis adapted to actuate the grinder, the output shaft (25) being provided along the direction of the table formed by said frame (1); , an actuating head (11) consisting of a spindle (2B) supporting an actuating member (28) adapted to undergo its own rotational movement, planetary deflection as well as vertical deflection, said actuating head (11) is a tubular sleeve (14) supported by a swing axis (X-x') of a pulley (7) that crosses concentrically and is provided with a bearing (17) for support and rotation therein; The tubular extension (1) of the crankcase (19) of the electric motor (15) is mounted concentrically on the bearing (17) of the motor (14).
8), and fixing means (22) for fixing the extension (18) in an angular state to the sleeve (14).
is supported by the pulley (7), and is supported by the swing shaft (X
-X') for elastically urging the sleeve (14) to pivot about the sleeve (14).

Therefore, according to the present invention, there is provided a mold inner surface polishing machine that uses an electric motor and can easily control the pivoting state of the electric motor.

[Brief explanation of the drawing]

FIG. 1 is a front vertical sectional view showing the structure of an embodiment of a mold inner surface polishing machine according to the present invention; FIG. 2 is a partial sectional view taken along line II-II in FIG. 1; FIG. 3 is a front view showing the operating head in FIG. 1 with a partial cross-section taken and enlarged; FIG. 4 is a plan view taken along the line IV-IV leading to FIG. 3; FIG. A sectional view cut along the v-v line in FIG. 1 and shown enlarged; FIGS. 6 and 7 show the position of the operating head during operation as shown in FIG. FIG. 2 is a front view showing different positions corresponding to FIG. In the figure, 1... frame, 2... upper table, 3...
...Guiding means, 3A...Jack, 3B...Guide rail, 4...Plate member, 5...Motor, 6...Belt, 7...Bell pulley, 8...Bearing, 9 −
...Thrust bearing, 10...Hub, 11...
Operating head, 12... Check screw, 13...
・Concavity, 14... Sleeve, 15... Electric motor,
16-...Biasing means, 17...Bearing, 18-...
・Extending portion, 19--Crankcase, 20--Screw, 21--Nut, 22--Fixing means, 2
3...Finger, 24-...Fork, 25...Output shaft, 26...Spindle, 27-...Groove, 28...
- Operating member, 29... Roller bearing, 30...
Natsuto, 40...Cheek, 41...Base, 42.
...Screw, 43-...Knuckle joint, 44
... Elastic branch, 45-... Pressure lever, 46...
・Locking member, 4 sockets, 47a...
Recessed portion, 48... Shoulder ring, 49... Elastic return means, 50... Shoulder piece, 51... Core portion, 52
-... Pivot pin, 53... Pin, 54... Blindfold hole, 55... Pivot pin, 56... Transfer truck, 57
... Roller, 58 ... Pin, 59 ... Core part, 6
0...Yoke, 61...Shoulder piece, 62...Nose part, 63...Flann, jig part, C...Circumference, E...Inner surface, fl...Swinging direction, M ... Mold, P... Vertical plane, x-x'... Swing axis.

Claims (1)

[Claims] (1) A horizontal plate (
4) and a frame (1) equipped with a motor (M) for rotationally driving a rotary bearing (7) constituted by an annular pulley; A swing axis (X-
a working head (11) supported by a pulley (7) via a an electric motor (15) having a generally vertical axis adapted to energize, the output shaft (25) being provided along the direction of the table formed by said frame (1), and the polishing disk being in operation; an actuating head (11) consisting of a spindle (26) supporting an actuating member (28) adapted to undergo its own rotational movement, planetary deflection as well as vertical deflection;
The operating head (11) is supported by a swing shaft (X-X') of a pulley (7) that crosses concentrically, and has a bearing (X-X') for support and rotation therein.
a tubular sleeve (14) with a sleeve (17); a tubular extension of the crankcase (19) of said electric motor (15), which rests concentrically on the bearing (17) of said sleeve (14); (1
8), a fixing means (22) for fixing the extending portion (18) in an angular state to the sleeve (14), and a fixing means (22) for fixing the extending portion (18) to the sleeve (14) in an angular state; -X') urging means (16) for elastically urging the sleeve (14) to pivot about the inner surface of the mold. (2) The biasing means (16) includes an elastic branch (44)
and a pressure lever (45) articulated by a pivot pin (55) extending in a direction substantially parallel to the swing axis (X-X').
), and includes a knuckle joint (43) for acting on the sleeve (14). (3) The pressure lever (45) is connected to the sleeve (14).
) roller (57) attached to the flange (63) of
The mold inner surface polishing machine according to claim 2, characterized in that the mold is constantly pressed. (4) said elastic branch (44) is a shoulder ring carrying a barring means (49) in a piece (50) articulated to a lever (45) at a predetermined distance from a pivot axis (55); 3. The mold internal polishing machine according to claim 2, characterized in that an adjustable force is applied via the member (46) urging the (48). (5) The biasing means (16) comprises a support member extending along the vertical direction and having two cheeks (40) laterally spaced from each other. The mold inner surface polishing machine according to item 1 or 2. (6) The jointed piece (50) and the ring (
48) are mold inner surface polishing discs according to claim 4, wherein the mold inner surface polishing discs are joined to each other through nested joints. (7) The fixing means (22) includes a fork (24) fixed to the crankcase (19) of the electric motor (15).
and a finger (23) fixed to the horizontal plate (4). (8) The extension part (18) has a spindle (2
6) The mold inner surface polishing machine according to claim 1, further comprising a bearing (29) for guiding and supporting the mold inner surface polishing machine.