JPH0726084Y2 - Fastening structure between die plate and die in molding die device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is to fasten a die plate and a die in a molding die apparatus in which a movable die and a stationary die are vertically opposed to each other. Regarding the structure.

[Problems to be Solved by Prior Art and Invention]

In this type of molding die device, as in the injection molding machine shown in FIG. 5, the movable side mold 2 and the fixed side mold 4 are arranged to face each other in the left-right direction, and the movable side mold 2 is a cylinder. The structure is such that it can move toward and away from the fixed mold 4 via the mechanism 6. The molds 2 and 4 are integrated with die plates 3 and 5 supported by four tie bars 7 by fastening bolts and nuts. For this reason, when replacing the mold, remove the bolts and nuts between the molds 2 and 4 and the die plates 3 and 5, suspend the molds 2 and 4 by a crane, and then carry out the new mold. It was hung up and carried to a predetermined position on the die mounting surface of the die plates 3 and 5, and the bolt holes of the die 2 and 4 side and the die plate 3 and 5 side were aligned and bolt nuts were fastened.

As described above, in the conventional fastening structure between the die plate and the die, there is a problem that the die replacement work such as the alignment of the bolt holes and the bolt nut fastening work is very troublesome when the die is replaced. .

The present invention has been made in view of the above-mentioned problems of the prior art,
It is an object of the present invention to provide a fastening structure between a die plate and a die in a molding die device that facilitates die replacement work.

[Means for Solving the Problems]

In order to achieve the above object, in a fastening structure between a die plate and a die in a molding die apparatus according to the present invention, a fixed die plate and a movable die plate that are vertically arranged with their die mounting surfaces facing each other are provided. Side die plates, a group of guide rollers that are provided in series below the die mounting surfaces of the respective die plates in series to form a die plate traveling path along the die mounting surfaces, and the die plate traveling At the side edge positions above and below the road,
Mold plate A taper block that is placed across the running path and faces the die plate, and slides up and down along the inclined guide surface of this taper block to move the mold plate from the upper and lower side edge positions of the mold plate running path. A wedge-shaped clamp claw that presses the mold plate side edge part in the mold plate runway toward the die plate side when it protrudes to the inside of the running path and clamps the mold plate side edge part in cooperation with the die plate. A mold clamping mechanism that is a lever mechanism that slides the clamp claws up and down and has an arm length on the input side longer than an arm length on the output side.

[Action]

The die moves along the die plate running path along the die plate with the lower edge of the die plate integrated with the die body being guided by the guide roller group, and the die plate mounting surface It can be easily positioned at a predetermined position, and moreover, the wedge-shaped clamp claws of the clamp mechanism are projected to the inside of the mold plate traveling path, and the upper and lower side edge parts of the mold plate are pressed against the die plate side, and the mold is fixed. Fastened and integrated with the die plate. Also, when the clamp plate of the clamp mechanism releases the clamp of the mold plate, the fastening between the mold and the die plate is released, and the lower edge of the mold plate is guided by the guide roller to travel along the mold plate travel path. Then, the mold can be removed from the traveling path and the mold can be removed from the die plate. Also, in the lever mechanism that slides the clamp claw up and down, the length of the input side arm is longer than the length of the output side arm, so the clamping force of the mold by the clamp claw is equivalent to the ratio of the arm length of the lever mechanism. Doubled.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

1 to 4 show an embodiment of the present invention.
FIG. 1 is an overall view of an injection molding machine equipped with a horizontal mold device, FIG. 2 is a sectional view taken along line II-II shown in FIG. 1, and FIG.
The drawing is a sectional view taken along line III-III shown in FIG. 2, and FIG. 4 is a sectional view taken along line IV-IV shown in FIG.

In these drawings, reference numeral 10 is a movable die plate guided by four tie bars 12 so that the die mounting surface 11 is vertical, and is configured to slide in the direction of arrow A by a hydraulic cylinder mechanism 14. Has been done. Reference numeral 30 denotes a fixed-side die plate supported by the tie bar 12, and the die mounting surface 31 is arranged so as to face the die mounting surface 11 of the movable die plate 10. Die plate 10, 30 facing mold mounting surface 11,
Frames 15 and 17 that extend horizontally along the upper and lower side edge portions of the die plates 10 and 20 are attached to 31 respectively, and guide rollers 18 (18a to 18d) are pivotally attached to the frame body 17. . On the guide roller 18, a mold plate running path 19 (see FIG. 4) is formed, one surface of which is guided by the surface of the die plate 10 and the other surface of which is guided by the upper edge 17a of the frame body 17. There is. Although only the movable side die plate 10 is shown in the figure, and the fixed side die plate 30 is not shown, the fixed side die plate 30 is also provided with a guide roller group having a structure similar to that of the movable side die plate 10. A mold plate running path is formed.

The movable side mold 209 and the fixed side mold 40 attached to the die plates 10 and 30 respectively include a mold body 22 and 42 in which a cavity C which is a resin molding surface is formed, and the mold body 22 and 42. A rectangular mold plate 24, 4 that is one size larger than the mold body that is integrated with 42 by fastening bolts and nuts.
It consists of four. Then, the molds 20 and 40 can be slid into the respective mold plate running paths 19 from the side of the die plates 10 and 30 to be positioned at predetermined positions on the mold mounting surface.

A clamp mechanism 50 having a wedge-shaped clamp claw 52 that clamps the lower edge 25A of the mold plate 24 in the mold plate traveling path 19 is disposed below the guide roller 18. The clamp mechanism 50 includes a taper block 54 having an inclined guide surface 54a facing the die plate 10 across the traveling path 19 at a lower edge position of the die plate traveling path 19 between adjacent guide rollers, and the taper block 54. Wedge-shaped clamp claw 52 that slides up and down while being guided by the inclined guide surface 54a of
And an L-shaped lever mechanism 60 for driving the wedge-shaped clamp claw 52. The L-shaped lever mechanism 60 includes a rotating shaft 62 extending along a lower edge of the die plate 10 at a lower position of the lower edge of the die plate 10, and an axis having a predetermined distance in the axial direction of the rotating shaft 62. The attached output side arm 64, the link 66 pin-connected to the clamp claw 52 and the pin connection to the output side arm 64, the input side arm 68 pivotally attached to the crankshaft 62, and the input side arm The clamp cylinder 69 is connected to the pin 68 to rotate the rotating shaft 62. The length of the input arm 68 is equal to the output arm.
64, that is, the length of the input side arm of the L-shaped lever mechanism is made longer than the length of the output side arm,
The force acting on the input arm 68 is doubled by the ratio of the arm lengths and transmitted to the link 66.
With a slight driving force from 69, a large clamping force can be generated on the clamping claw 52. Reference numeral 63 is a bracket that supports the rotating shaft 62 and is fixed to the die plate 10. The taper block 54 is fastened to the back side (die plate side) of the frame body 17 by bolts 55. Sign
Reference numeral 55a is a long hole through which the bolt 55 is inserted, and the position of the taper block 54 can be adjusted in the vertical direction with respect to the frame body 17, whereby the clamp force of the mold plate 24 by the clamp claw 52 can be adjusted. Reference numeral 56 is a leaf spring that presses the clamp claw 52 against the inclined guide surface 54a of the taper block 54.

The shaft 70 of the guide roller 18c is connected to the output shaft of the drive motor 74 via a pair of bevel gears 72a and 72b, and the guide roller 18c is driven to rotate by the motor drive. Further, two chain wheels 76 and 77 are axially mounted on the shaft 70 of the guide roller 18c, and chain wheels 78 and 79 respectively axially mounted on the shafts of the adjacent guide rollers 18b and 18d are connected via the chain 80. The rotary drive force is transmitted. The guide rollers 18a and 18b are also rotationally driven via the chain wheels 81 and 82 and the chain 80. Therefore, all the guide rollers 18 (18a to 18d) are rotationally driven in the same direction by the drive motor 74, whereby the mold plate 24 in the mold plate traveling path 19 is moved.
Slide along.

A clamp mechanism similar to the above-mentioned clamp mechanism 50 is also provided at the upper end position of the mold plate traveling path 19,
The upper side edge portion 25B of the mold plate is clamped by the protrusion of the clamp claw in the mold plate travel path 19. Reference numeral 52A in FIG. 2 is a clamp claw that is a part of a clamp mechanism that clamps the upper edge portion 25B of the mold plate 24.

Further, in FIG. 1, reference numeral 90 is a molten resin supply section, and reference numeral 92 is a frame of the injection molding machine.

Next, regarding the die replacement work, the fixed side die plate 10
Will be described as an example.

First, an empty die transfer jig (not shown) is arranged on one side of the die plate 10, and the die accommodating portion of the jig is positioned on an extension line of the die plate travel path 19. Further, a die transfer jig (not shown) accommodating a new die is arranged at a lateral position on the opposite side of the die plate 10. Then, from the state shown in FIG. 2 (the state in which the upper and lower side edge portions 25A and 25B of the mold plate 24 are clamped by the clamp claws 52), the clamp cylinder 69 is operated and the clamp claws of the clamp mechanism 50 are operated.
The clamp of the lower edge 25A of the mold plate by 52 is released. The clamp of the upper edge 25B of the mold plate 24 by the clamp claw of the upper clamp mechanism is likewise released. Next, the drive motor 74 is driven to rotate each guide roller 18 and slide the mold plate 24 to push the mold 20 into an empty mold conveying jig. On the other hand, after taking out the mold 20 from the mold plate running path 19, the operator pushes out a new mold from the mold conveying jig, and the tip of the mold plate reaches the position where it engages with the guide roller 18. Push in. Then, the drive motor 74 is driven to guide the guide roller 18
Is driven and the mold plate is slid to move the mold to a predetermined position on the mold mounting surface of the die plate 10. Then, the clamp cylinder 69 is operated to cause the clamp claws 52 of the clamp mechanism 50 to project toward the mold plate traveling path 19 side (upward), and the upper clamp claws (not shown) similarly project toward the mold plate traveling path side (downward). Then, the upper and lower side edge portions 25A and 25B of the mold plate 22 are clamped by the clamp claws 52.

The case of die replacement for the fixed die plate 30 is the same as the case of die replacement for the movable die plate 10 described above.

As described above, according to this embodiment, the mold plate 10 is clamped and released by the clamp claws 52 of the clamp mechanism 50, so that the mold 20 can be fastened to and released from the die plate 10. The fastening and releasing between the die plate and the die can be performed very easily as compared with the conventional die fastening means of nut fastening. Moreover, since the mounting positions of the die and the die plate can be easily adjusted, the work of exchanging the die is much easier than in the past.

In the present embodiment, even if the power source of the clamp mechanism 50 is cut off due to a power failure or the like, the clamping of the mold plate 22 is maintained by the wedge action of the clamp claws 52, so the die plate 10 and the mold 20 are different from each other. It is kept at a constant fastening force and does not hinder injection molding.

Further, in the above-mentioned embodiment, the die transfer jig is used for the die replacement work, but the die may be transferred using a crane.

[Effect of device]

As is apparent from the above description, in the fastening structure between the die plate and the die in the molding die apparatus according to the present invention, the die is guided by the guide roller and the die plate traveling path along the die plate. It can be easily moved to a predetermined position on the die mounting surface of the die plate by traveling inside, and the upper and lower side edges of the die plate are pressed against the die plate side by the wedge-shaped clamp claws of the clamp mechanism to move the die. By fastening the die plate integrally with the die plate and releasing the clamp of the die plate by the clamp claw of the clamp mechanism, the fastening between the die and the die plate is released and the die is run along the guide roller. Since the mold can be easily removed from the die plate, the mold replacement work is significantly easier than in the past.

In addition, the clamp mechanism that clamps the upper and lower positions of the mold can generate a large clamping force with a small driving force, so the mold plate can be used with a small amount of energy and can withstand long-term use. It can be securely fixed to.

[Brief description of drawings]

FIG. 1 is an overall view of an injection molding machine equipped with a molding die device according to an embodiment of the present invention, and FIG. 2 is a line II-II shown in FIG.
3 is a sectional view taken along line III-III shown in FIG. 2, FIG. 4 is a sectional view taken along line IV-IV shown in FIG. 2,
FIG. 5 is an overall view of a conventional injection molding machine. 10,30 …… Die plate, 18 (18a-18d) …… Guide roller, 19 …… Mold plate traveling path, 20,40 …… Mold, 22,
42 …… Mold body, 24,44 …… Mold plate, 25A …… Mold plate lower edge, 25B …… Mold plate upper edge, 52,52A …… Clamp claw, 50 …… Clamp mechanism, 54 ...
... Taper block, 54a ... Inclined guide surface, 60 ... L-shaped lever mechanism, 62 ... Rotating shaft, 69 ... Clamp cylinder.

Claims (1)

[Scope of utility model registration request] 1. A fixed-side die plate and a movable-side die plate, which are arranged vertically with their die mounting surfaces facing each other, and are provided in series below the die mounting surface of each die plate, A group of guide rollers forming a mold plate traveling path along the mold mounting surface, and upper and lower side edge positions of the mold plate traveling path,
Mold plate A taper block that is placed across the running path and faces the die plate, and slides up and down along the inclined guide surface of this taper block to move the mold plate from the upper and lower side edge positions of the mold plate running path. A wedge-shaped clamp claw that presses the mold plate side edge part in the mold plate runway toward the die plate side when it protrudes to the inside of the running path and clamps the mold plate side edge part in cooperation with the die plate. A die clamp mechanism for sliding the clamp claw up and down, the die clamp mechanism comprising a lever mechanism having an arm length on the input side longer than an arm length on the output side, and a die plate in a molding die device. Fastening structure with the mold.