JPS6359906A - Last holder in injection molding machine - Google Patents

Abstract

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

Description

Detailed Description of the Invention A1 Object of the Invention (11 Industrial Field of Application) The present invention provides a support member that is movable up and down on a support that stands on a molding table, holds a shoe last on this support member, and The bottom surface of the shoe cover suspended from the shoe last is fitted over the upper surface of the cavity opening of the mold set on the molding table, and the sole is formed on the shoe cover by injecting the molding material into the cavity. The present invention relates to a shoe last holding device in an injection molding machine for injection molding.

(2) Prior Art Conventionally, as a shoe last holding device for this type of injection molding machine, for example, the one shown in Japanese Patent Publication No. 47-29139 is already known.

(3) Problems to be Solved by the Invention However, in the above-mentioned conventional shoe last, the shoe last is directly fixed to the support member with a screw rod, so when the shoe last is attached to or removed from the support member, the screw rod must be removed each time. Therefore, it is troublesome to put on and take off the shoe last, and it is difficult to maintain the shoe last.

The present invention has been made in view of the above-mentioned circumstances, and provides a shoe last holding device for the injection molding machine, which allows the shoe last to be quickly and easily attached to and removed from the support member, and which can accurately position the shoe last at a predetermined position on the support member. The purpose is to

B3 Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention provides a pair of engaging surfaces provided with tapered surfaces extending in the front and rear direction on both left and right sides of the end of the shoe last on the opening side. A pair of clamp pieces having a tapered surface that can be engaged with the engagement groove are provided on the supporting member of the injection molding machine, and a pair of clamp pieces are provided on the supporting member of the injection molding machine, and the clamp pieces are provided with a tapered surface that can be engaged with the engagement groove. The present invention is characterized in that a driving means for opening and closing the pieces is provided, and a taper pin that fits into the taper pin hole is provided in a protruding manner.

(2) Function: By fitting the taper pin into the taper pin hole and activating the drive means to close the clamp piece and engaging the clamp piece with the engagement groove of the shoe last, the shoe last is supported by the injection molding machine. The member can be quickly and accurately positioned and held.

(3) Example Hereinafter, an example of the present invention will be explained in detail with reference to the drawings. In FIG. The mold is conveyed to an injection molding machine 4 via a shoe last conveying device 5, and the injection molding machine 4
After the shoe sole 3 is injection molded, the shoe last conveying device 5 is again
The shoe last is transported to the shoe last transfer section 1 via the shoe last transfer section 1.

A pallet 8, which is transferred by a chain conveyor 7 provided on a base frame 6, is stopped at the shoe last transfer section 1.
A shoe last is held upside down on the pallet 8 via positioning and holding means 9. Further, a shoe last attaching/detaching mechanism 10 is disposed on one side of the base frame 6, which engages with the positioning and holding means 9 and can release the positioning and holding action of the positioning and holding means 9 on the shoe last on the pallet 8. be done.

As shown in Fig. 5.6, the shoe last includes a shoe last body 11, a mold 12 slidably provided on the heel portion of the last body 11, and a bolt 14. A plurality of fitting holes 15 are formed on both sides of the mounting part 13. Furthermore, a pair of engagement grooves 16.16 with tapered surfaces extending in the front-rear direction are formed at the base ends of both left and right side surfaces of the mounting portion 13, and a tapered pin hole 17 is formed at the center of the end surface on the shoe ITI side. is drilled. In the figure, reference numeral 18 denotes a locking mechanism for locking the shoe mold 12 in an aligned position with respect to the shoe last body 11.

Next, the heel-shaped conveying device 5 will be explained. As shown in FIG. 1, the shoe-shaped conveying device 5 consists of two 1st and 21st shoes R1 and R2. These robots R1 and Rz are made of the same 919 structure fi'L, which is conventionally known, so let's briefly explain the structure of R+. is supported so as to be freely pivotable around a vertical axis, and the base end of a lower arm 21 is supported at the upper part of this pivot main pillar 20 so as to be freely swingable around a horizontal axis.
Furthermore, the proximal end of an arm 22 is supported at the distal end of the lower arm 21 so as to be swingable about a horizontal axis. The hand portion 2 at the tip of the arm 22
3 is rotatable around the vertical axis, horizontal axis, and vertical axis of the upper arm 22. Therefore, the above-mentioned No. 1. The 20th robot 1-R1 and R2 are six-axis controlled automatic robots that operate according to a predetermined program. 1st゜20th Bot1-
The hand portions 23.23 of R1 and R2 each have 1
;■Multiple fitting holes 15 drilled in the mounting part 13 of the arrangement mold
A shoe last clamping tool 25 is provided which includes a plurality of bins that can be fitted with the shoe last I7 and which can clamp the shoe last I7.

However, the point where the bullet 8 supporting the shoe last with the C1 shoe cover 2 hung thereon is stopped by the shoe last transfer section 1, and the positioning and holding means 9 of the shoe last attaching/detaching mechanism IO4 is positioned with respect to the shoe last. Release the positioning and holding action on l-8 and separate the shoe last L5 from the shoe last L5.
After clamping the shoe last I with the shoe last clamping tool 25 provided on the hand portion 23 of the shoe last I, and taking it out from the bullet 8, it is turned over at 1806 and placed in an upright position. ] Transferred to. Then, the shoe last holding tool 25 is released, and the hand portion 23 of the tenth pot R6 is removed from the shoe last I. On the other hand, the shoe last having the shoe sole 2 on the bottom of which the sole 3 is injection molded by the injection molding machine 4 is the 20th bottle R.
2, the shoe last is pulled out from the injection molding machine 4, turned over about 1806 degrees, and placed on the empty pallet 8 of the shoe last transfer section 1. When the shoe last holding tool 25 is released from the clamp, the shoe last is transferred to the 20th bottle R2. will be separated from. In this way, the shoe last is transferred between the shoe last transfer section 1 and the injection molding machine 4 via the shoe last transfer device 5.

Next, the injection molding machine 4 will be described. The injection molding machine 4 is conventionally known and is used together with an injection machine (not shown) for injecting a liquid molding material for molding shoe soles. The injection molding machine 4 includes a turntable (not shown) that rotates around a vertical axis, and a number of molding tables 26 are installed radially on the turntable. As shown in FIG. 1, a support 27 is erected on each molding table 26, and the support 27
is provided with a support member 28 that can raise and lower the branch office 27-L. The support member 28 includes a last support block 29 and a rotating body 30.
Therefore, the shoe last support block 29 is connected to the support column 27.
The rotating body 30 is supported so as to be movable up and down so as to be able to adjust its vertical position via a guide 31, and the rotary body 30 is attached to the support block 29 along an axis β inclined outwardly in the direction f.
- It is rotatably supported around p. A shoe last holding device H in an injection molding machine, which will be described later, is attached to this rotating body 30.
A pair of shoe lasts ■,
is designed to be removably attached.

As shown in FIGS. 1 to 3, a shoe sole mold 32 made of a metal mold is installed on the molding table 261. This mold 32 is also conventionally known, and as shown in FIG. 3, it is composed of a bottom mold 33 and a pair of side molds 35a and 35b that can be opened and closed with respect to the bottom mold 33 by opening/closing mechanisms 34 and 34. , thereby forming a recess 36 defining a cavity C for the sole 3.

Then, as shown in FIGS. 2 and 3, the shoe last with the shoe cover 2 suspended by the tenth pot R0 is placed on the rotating body 30 on the mold 32 via the shoe last holding bag WH. Next, when the support block 29 is lowered and the shoe last approaches the mold 32, the shoe last and the mold 32 form a cavity C for molding the sole 3.

The molding table 26 in which the molding die 32 and the shoe mold are inserted and the cavity C is formed is sequentially sent immediately before the injection machine by intermittent feeding of the turntable, and the liquid molding material is injected into the cavity C by the injection machine. Then, the sole 3 is injection molded, and the sole 3 is integrally connected to the sleeve 2. The molding table 26, on which the injection molding of the sole 3 has been completed, is returned to the two first molding tables by the rotation of the turntable. 20th bot R+, Rz
At this point, as shown in FIG. 2.3, the shoe last support block 29 is raised, the shoe last is separated from the sole mold 26, and the shoe sole 3 attached to the shoe cover 2 is removed. The shoe last having the shape is floated from the mold 32. Here, the rotating body 30 is reversed by 180 degrees, and the shoe last with the shoe cover 2, which has already been fitted with the eaves for a long time, is placed on the lower side.
This shoe last is clamped by the 20th bot R2 and removed from the injection molding machine 4.

Next, regarding the shoe last holding devices H, which are provided in pairs on the rotating body 30 of the injection molding machine 4 with a phase difference of 180°,
This will be explained with reference to Figure 6. A screw rod 37 is screwed onto the rotating body 30 so that it can be screwed forward and backward, and a block body 39 is fixed to the tip of the screw rod 37. A rod portion 45 integrally formed at the tip of the screw rod 37 passes through the block body 39, and a portion of the rod portion 45 protruding from the lower surface of the block body 37 is tapered to form a core portion. Taper pin 46
It becomes.

On the other hand, on the opposite side of the block body 39 from the above-mentioned fixed portion to the screw rod 37, an air cylinder 38 as a driving means is provided, which is provided with a piston 43 driven by compressed air. A pair of support pieces 44, 44 are protruded from both sides of the block body 39 with the piston 43 in between, and a clamp piece 4 having a tapered surface at the tip thereof is attached to the support pieces 44, 44.
0.40 are pivoted 41 and 41, respectively. Further, the piston 43 and the base end of the clamp piece 40.40 are connected via a pair of links 42.42. Therefore, when the piston 43 of the air cylinder 38 operates, the link 42.
A pair of clamp pieces 40, 40 are opened and closed via 42. Then, after opening the pair of clamp pieces 40.40 and fitting the taper pin 46 protruding from the distal end surface of the cylinder body 39 into the shoe-shaped taper pin hole 17, the clamp pieces 40.40 are closed by the upward movement of the piston 43. (Fig. 3), the tip of the clamp piece 40.40 has a shoe-shaped engagement groove 16.
, 16, the shoe last can be accurately attached to a predetermined position on the rotating body 30. In this case, the engagement grooves 16,1
Since the tapered surfaces of the clamp pieces 6 and 40 engage with each other, the shoe last can be firmly connected to the rotating body 30. As a result, the shoe last can be reliably set in the mold 32, and the sole 3 can be injection molded with high accuracy. Furthermore, the shoe last can be attached to the rotating body 30 quickly and easily by the simple procedure described above.

Incidentally, when the shoe last is to be removed from the rotating body 30, the above-mentioned procedure may be reversed, and in this case as well, the operation can be carried out quickly and easily.

C3 Effects of the Invention As described above, according to the present invention, a pair of engagement grooves each having a tapered surface extending in the front-rear direction are formed on both left and right sides of the end of the shoe last on the end of the shoe last. A tapered bottle hole is bored, and the support member ζ2 of the injection molding machine is provided with a pair of clamp pieces each having a tapered surface that can be engaged with the engagement groove, and a driving means for opening and closing the clamp pieces. Since the taper bottle that fits into the taper bottle hole is provided in a protruding manner, the tapered bottle is fitted into the taper bottle hole, the driving means is actuated to close the clamp piece, and the shoe last is injected by engaging the clamp piece with the engagement groove. The shoe sole can be quickly and accurately positioned and held on the support member of the molding machine, and therefore the shoe last can be reliably set in the mold and the shoe sole can be injection molded with high precision. Moreover, since the shoe last can be attached to and removed from the injection molding machine with a simple operation, maintenance of the shoe last can be performed easily.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an overall side view of an injection molding machine equipped with the device of the present invention, FIG. 2 is an enlarged side view showing the main parts of FIG. 1, and FIG. is the ■arrow view in Figure 2,
FIG. 4 is a partial plan view showing the operating state of the device of the present invention, and FIG.
The figure is a longitudinal sectional view taken along line V-V in FIG. 3, and FIG. 6 is an exploded perspective view of the device of the present invention. 2...Shoe cover, 3...Sole, 1G...Engagement groove, ]7
... Tapered bottle hole, 26 ... Molding table, 27 ... Support column, 28 ... Supporting member, 32 ... Molding mold, 38 ...
・Air cylinder as a driving means, 40... Clamp piece, 46... Taper bottle, C... Cavity, H... Shoe last holding device in injection molding machine, ■,... Shoe last

Claims (1)

[Claims] A support member is provided on a pillar set upright on a molding table so as to be movable up and down, a shoe last is held on this support member, and the bottom surface of the shoe cover suspended from this shoe last is set on the molding table. In an injection molding machine that is fitted over the upper surface of a cavity opening of a mold and injects a molding material into the cavity to injection mold a shoe sole onto the shoe sole, A pair of engagement grooves with tapered surfaces are formed on both left and right side surfaces and extend in the front-rear direction, and a tapered pin hole is formed in the end face on the shoe opening side, while the support member is capable of engaging with the engagement grooves. A shoe last holding device for an injection molding machine, comprising a pair of clamp pieces each having a tapered surface, a drive means for opening and closing the clamp pieces, and a protruding taper pin that fits into the taper pin hole.