JPH079612Y2 - Mold release device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a mold release device for releasing a mold such as plastic or rubber.

(Prior Art) As a conventional molding die and mold releasing device of this type, there is, for example, one shown in FIGS. 34 to 36. All are divided into an upper mold 101, a middle mold 102, and a lower mold 103.
Molding die 100 divided into pieces, upper mold 101, middle mold 1 when releasing
The mold is opened in order of 02.

FIGS. 35 to 40 show working steps of the conventional three-sheet separating device. That is, as shown in FIG. 37, when the molding is completed, the lower heating platen 111 is lowered by the press cylinder 110, and the piston 112 is separated from the molding die 100. The piston 112 is fixed to the upper platen 114 of the press with the piston fixing hook 113.
While the mold 100 is fixed by the upper mold fixing hook 115.

Next, as shown in FIG. 38, the molding die 100 is moved from the press side A to the mold releasing device side B by the mold loading / unloading cylinder 116. The mold 100 is guided by the transfer roller 117.

In the mold release process, as shown in FIG. 39, first, the upper mold release device.
At 120, the upper mold 101 is released. At this time, the medium-sized fixed hook
Since the middle mold 102 and the lower mold 103 are fixed downward by 121, they are smoothly released from the mold. Thereafter, as shown in FIG. 40, the reversing motor 122 and the upper die 101 are connected, and the reversing motor 122 reverses the upper die 101 by a certain angle.

Next, as shown in FIG. 41, the middle-sized fixed hook 121 is reversed by the reversing mechanism that operates in conjunction with the middle-sized mold releasing device 123, and the middle-sized thrust cylinder 124 raises the middle-sized mold releasing device 123 to move the middle-sized mold 102. To separate. At this time, the lower mold 103 is fixed downward by the lower mold fixing hook 125. In this way, the upper mold 101, the middle mold 102, and the lower mold 103 are disassembled as shown in FIG.

(Problems to be solved by the invention) However, in the case of the above-mentioned conventional technology, the mold releasing devices 120 and 123 dedicated to the upper mold 101 and the middle mold 102 are required respectively, and the mold releasing mechanism becomes complicated and expensive. .

Further, in the case of the molding die using the nest 104 shown in FIG. 36, it is necessary to fix the nest 104 at the time of mold release,
It is necessary to devise the parting line of the mold itself, which increases the number of mold divisions.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a mold releasing apparatus that can easily release a mold.

(Means for Solving the Problems) In order to achieve the above object, the present invention has an upper mold, a middle mold, and a lower mold, and the lower mold is substantially orthogonal to the mold release direction. A molding die having a pair of movable hooks provided with an engaging portion that slides only in the direction and holds the middle die with respect to the lower die, and an elastic means that presses the pair of movable hooks toward the middle die side. A releasing device for releasing, comprising: a fixed hook for holding the lower die; a base moving in a direction opposite to the fixed hook; and a pair of a second end connected to the base and abutting against the upper die. A protrusion and a release portion connected to the base and for releasing the movable hook to the outside against the elastic means at the other end, and a release portion having a body length shorter than the protrusion and connected to the base. And the other end is in contact with the middle mold and the body length is shorter than that of the release portion. And having a second push-up portion.

(Operation) In the mold releasing apparatus having the above-described configuration, the protrusion, the release portion, and the second protrusion connected to the base are in the order of the length of the upper mold release, the middle mold release, and the middle mold release, respectively. Do the molds in order.

(Example) Below, this invention is demonstrated based on the Example shown in figure. First
FIG. 20 to FIG. 20 show a mold which is released by the release apparatus according to the first embodiment of the present invention. Of these, FIGS. 1 and 2 show a schematic structure, FIGS. 3 to 16 show a detailed structure, and FIGS. 17 to 20 show a releasing process.

First, the schematic configuration shown in FIG. 1 and FIG. 2 will be described. 1 indicates the entire molding die, and a schematic upper die 2 and
It is composed of a middle mold 3 and a lower mold 4. The lower mold 4 is provided with a fixing mechanism 5 for fixing the middle mold 3.
The release pins 81 are provided on both sides of the release device and can be released at the time of release by a release pin 81 as a release portion provided on the release device 70.

The fixing mechanism 5 includes a movable hook 51 that engages with the middle die 3,
The movable hook 51 is capable of reciprocating between a fixed position R where the movable mold 51 is engaged with the middle mold 3 and a release position F which is separated from the middle mold 3. The movable hook 51 is moved in a direction perpendicular to the releasing direction of the middle die 3. The movable hook 51 is constantly pressed by the middle mold 3 by a spring force such as a spring (not shown in FIGS. 1 and 2) and is maintained in a fixed state.

On the other hand, the movable hook 51 is released by a release pin 81 as a release member that is erected on the protruding plate 80 of the release device.

That is, the lower die 4 is provided with the release pin hole 41 corresponding to the position of the movable hook 51. The movable hook 51 is provided with a notch 511 with which the release pin 81 engages, and the release pin 81 penetrated from the release pin hole 41 causes the guide surface 512 at the back of the notch 511 to release the movable hook 51. It is designed to be pressed.

In addition to the release pin 81, a release pin 82, which is a second protrusion for pushing up the middle mold 3 and releasing it, is erected on the protruding plate 80, and is punched in the lower mold 4. Medium size 3 through the guide hole 42
It contacts the lower surface and releases the middle mold 3.
The release pin 82 and the release pin 81 operate in the following order.
After 81 is released from the middle mold 3, the release pin 82 contacts the middle mold 3 and pushes up the middle mold 3.

Next, the molding die of the first embodiment will be described in detail with reference to FIGS. 3 to 16.

The molding die 1 in the illustrated example is a molding die for transfer molding, and has an upper mold 2 having a pot portion 21 for storing a molding material, and a piston for press-filling the material in the pot portion 21 into the cavity 6. 7 is attached.

The fixing mechanism 5 for fixing the middle die 3 is provided at two places on both the left and right sides with the middle die 3 interposed therebetween. The structure of the fixing mechanism 5 is composed of a movable hook 51, a spring 52 as an elastic means for pressing the movable hook 51 against the middle die 3, and a guide pin 53 for guiding the movable hook 51.

As shown in detail in FIGS. 9 to 16, the movable hook 51 is a rectangular parallelepiped having a substantially rectangular cross-section, and is arranged along the side edge of the middle mold 3 in the longitudinal direction. Engagement protrusion that is an engagement portion that overhangs the edge so as to be caught on the upper surface of the middle mold 3.
513 is projected. The movable hook 51 is housed in a concave groove 43 formed in the lower mold 4 so as to be movable in a direction in which the movable mold 51 comes in contact with and separates from the middle mold 3, and at a fixed position R, an engaging projection 513 is provided on the upper surface of the middle mold 3. It is supposed to be covered. The fixed position R is positioned at a position where the side surface of the movable hook 51 contacts the first groove wall 431 of the concave groove 43.

The movable hook 51 moves in the middle 3
A guide pin 53 guides the lower mold 4 and the middle mold 3 in parallel with each other so as to smoothly engage and disengage.

A U-shaped notch 511 into which the release pin 81 is inserted is provided at the center of the side surface of the movable hook 51 on the side of the middle mold 3, and the guide pins 53 and 53 and the springs 52 and 52 are centered on the notch 511. Are arranged symmetrically one by one.

The spring 52 and the guide pin 53 are interposed between the back surface of the movable hook 51 and the second groove wall 432 of the concave groove 43.

The guide pin 53 makes the moving direction of the movable hook 51 parallel to the upper surface of the middle die 3, that is, the engaging projection 51 of the movable hook 51.
3 is a guide for smoothly engaging and disengaging with respect to the upper surface of the middle mold 3, one end is fixed to a screw hole 514 formed on the back surface of the movable hook 51, and the other end is formed on the second groove wall 432. It is slidably inserted into the guide hole 433 via the guide bush 54.

The spring 52 constantly biases the movable hook 51 in the engagement direction with respect to the middle die 3, one end of which is engaged with a first spring receiving hole 515 provided on the back surface of the movable hook 51 and the other end of which is the second groove wall 432.
It is inserted into the second spring receiving hole 434 formed in the. The outer opening of the second spring receiving hole 434 is closed by the blind lid 55 so that the spring 52 can be mounted from the outside.

On the other hand, a release pin hole 41 for inserting a release pin that engages with the notch 511 of the movable hook 51 and releases the movable hook 51 is opened in the bottom surface of the storage groove 43 on the lower side 4. This release pin hole 41
The position of does not coincide with the notch 511 at the fixed position R of the movable hook 51, and the rear end face of the notch is arranged so as to cross the center of the release pin hole 41. Then, when the release pin 81 is inserted, the release pin 81 forcibly moves the movable hook 51 in the direction of separating from the middle mold 3.

17 and 18, the movable hook 51 of the mold 1 is shown.
A bump plate 80 is shown with a release pin 81 for release.
The push-up plate 80 is attached to a mold releasing device, and two release pins 81 are provided upright at positions corresponding to the release pin holes 41 provided in the lower die 4. Further, release pins 82, 82, ... For releasing the middle mold 3 are provided upright at four positions.

The release pin 81 is provided with a tapered surface 811 as a pressing portion at the tip, and is configured to gradually move the movable hook 51 in the opening direction in accordance with the push-up operation of the push-up plate 80. In addition, the end surface 821 of the release pin 82 has an engagement hole 3 formed in the middle mold 3.
An engaging projection 822 to be inserted into 1 is provided so as to prevent a mold deviation at the time of releasing the middle mold 3.

FIGS. 19 to 22 show the mold releasing process of the mold of this embodiment. As for the mold releasing device, regardless of whether the molding die 1 is of the three-part type, the two-part separating device 70 can be used.

First, FIG. 19 and FIG. 20 show a transfer process of transferring the molding die 1 from the press side A to the mold releasing device side B after the completion of molding. In this transfer step, the press cylinder 71 is contracted to lower the lower heating plate 72, and the piston 7 is separated from the upper mold 2. The piston 7 is heated by the piston fixing hook 73.
The upper die 2 is fixed by the upper die fixing hook 75. Then, the mold loading / unloading cylinder 76 transfers the molding die 1 from the press side A to the mold releasing apparatus side B. The mold 1 is guided by the transfer roller 77.

FIG. 21 shows the releasing process of the upper mold 2 and the middle mold 3. The mold releasing device 70 includes upper mold holding means 78 for holding the upper mold 2.
And an upper die thrusting cylinder 79 for raising and lowering the upper die holding means 78, which is the upper portion of the thrust. Upper die holding means 78
Is a frame body that opens upward in a U shape, and the bottom plate portion 78 that is the base.
1 and a pair of arm portions 782, 782 projecting from both sides of the bottom plate portion 781 and extending in parallel. This arm 782,7
Engagement portions 783, 783 with which both ends of the upper die 2 engage are provided on the upper end of 82. Then, the above-mentioned protruding plate 80 is provided on the bottom plate portion 781 of the upper die holding means 78.

When the upper die holding means 78 moves up, the lower die 4 is fixed downward by the lower die fixing hook 83, and the protruding plate 80 rises as the upper die holding means 78 moves up. Then, as the push-up plate 80 rises, the movable hook 51 holding the middle die 3 in a fixed state is released by the release pin 81 provided on the top plate 80, and then the release pin 82 contacts the middle die 3. Then, the middle mold 3 is released.

Therefore, the upper die 2 and the middle die 3 can be sequentially released by simply pushing up the upper die push-up cylinder 79.

FIG. 22 shows the reversing process of the upper mold, in which the upper end of the released upper mold 2 comes into contact with the reversing roller 84, and the upper mold holding means 78 is still present.
Is raised, the upper mold 2 is inverted by a certain angle.

A second embodiment of the present invention is shown in FIGS. 23 to 33. This molding die 10 is composed of an upper die 11 and a lower die 12, and a lower die 12
A fixing mechanism 15 for fixing the metal fitting 13 as a nest is provided in the.

The metal fitting 13 is composed of a substantially U-shaped head 131 and a cylindrical portion 132 extending from the center of the head 131.
An annular molded body made of resin, rubber or the like is integrally molded so as to surround the outer periphery from the root portion toward the tip end to the midway position.

Then, the metal fitting 13 has its head 131 facing downward, the head 131 is housed in the recess 16 formed on the upper surface of the lower mold 12, and the cylindrical portion 132
Is inserted into a central hole 17 formed in the center of the upper mold 11. A large-diameter annular recess 18 is provided on the open end side of the central hole 17 provided in the upper mold 11, and an annular core is provided in the annular recess 18.
19 is locked in and fixed. The lower surface of the core 19 is in close contact with the head 131 of the metal fitting 13, and the inner circumference of the core 19 and the cylindrical portion 1 of the metal fitting 13
The cavity 20 is constituted by an annular space formed between the outer circumference and the outer circumference.

The fixing mechanism 15 is arranged at three places around the metal fitting head 131, and is a movable hook that can be engaged with and disengaged from the metal fitting 13.
151, a guide pin 152 for guiding the moving direction of the movable hook 151, and a spring 153 for pressing the movable hook 151 against the metal fitting 13.

The movable hook 151 has a rectangular parallelepiped shape and is provided with a guide hole 1511 into which the release pin 25 is inserted, and a screw hole 1512 into which the guide pin 152 is screwed and fixed is provided at one end thereof. The guide hole 1511 of the movable hook 151 is
51 is a release pin hole provided in the lower mold 12 at the fixed position R
It is out of phase with 12a, and when the release pin 25 is inserted, the movable hook 151 separates from the metal fitting 13 and the fixed state is released.

On the other hand, the guide pin 152 has a guide hole 12b formed in the lower mold 12.
One end thereof protrudes to the outside of the lower mold 12 through the and is inserted into the spring case 154 attached to the lower mold 12. The spring case 154 is fixed to the lower die 12 by two bolts 155, 155, and an insertion hole 156 into which the guide pin 152 is inserted is provided at the center thereof. Then, the spring 153 is mounted in a compressed state between the end of the guide pin 152 and the rear end of the insertion hole 156, and urges the movable hook 151 toward the metal fitting 13.

The molding die of the second embodiment is also released by a two-piece type releasing device as shown in FIGS. 19 to 22. Then, as shown in FIGS. 32 and 33, only the release pin 25 is erected on the protruding plate 26, and after releasing the upper mold 11, the fixing of the metal fitting 13 is released by the release pin 25. The metal fitting 13 can be taken out.

(Effects of the Invention) The present invention has the above-described configuration and operation, and the protrusion, the release portion, and the second protrusion connected to the base release the upper mold and the middle mold respectively in the order of their length. Also, the middle mold can be released in order, and the middle mold is not released when the upper mold is released, and is reliably held by a pair of movable hooks having an engaging portion that holds the lower mold. Therefore, there is no danger of moving with the upper mold. Therefore, it is possible to provide a mold releasing device having a simple structure and high safety.

[Brief description of drawings]

1 to 20 show a molding die and a mold releasing apparatus according to a first embodiment of the present invention. FIG. 1 is a sectional view showing a schematic configuration of a middle die fixed state, and FIG. Sectional drawing which shows the schematic structure of a state, FIG. 3 is a partially broken plan view which shows the detailed structure of the shaping | molding die of 1st Example, FIG.
FIG. 6 is a partially cutaway side view seen from a direction orthogonal to FIG. 4, FIG. 6 is a sectional view taken along line VI-VI in FIG. 3, and FIG. 7 is a sectional view taken along line VII-VII in FIG. Fig. 8 is a sectional view taken along line VIII-VIII, Fig. 9
FIG. 10 is a schematic exploded perspective view of the fixing mechanism of FIG. 3, and FIG.
FIG. 11 is a plan view of the movable hook shown in FIG. 11, FIG. 11 is a sectional view taken along line XI-XI of FIG. 10, FIG. 12 is a sectional view taken along line XII-XII of FIG. 10, and FIG.
0 XIII-XIII line sectional view of FIG. 14, FIG. 14 is a front view of the guide pin of FIG. 10, FIG. 15 is a sectional view of the guide bush of FIG.
16 is a vertical cross-sectional view of the blind lid of FIG. 10, FIG. 17 is a plan view of the protruding plate, FIG. 18 is a cross-sectional view taken along the line XVIII-XVIII of FIG. 17, and FIGS. FIG. 23 to FIG. 33 are schematic configuration diagrams of a molding die and a mold releasing device for explaining the die process, which are the second embodiment of the present invention.
FIG. 23 shows a molding die and a mold releasing apparatus according to an embodiment, FIG. 23 is a plan view, FIG. 24 is a longitudinal sectional view, FIG. 25 is a schematic exploded perspective view of the fixing mechanism of FIG. 23, and FIG. FIG. 25 is a plan view of the movable hook, FIG. 27 is a vertical sectional view of FIG. 26, FIG. 28 is a plan view of the spring case of FIG. 25, and FIG. 29 is IIXIX-IIXI of FIG.
X-ray cross-sectional view, FIG. 30 is a IIIX-III X-ray cross-sectional view of FIG. 28, FIG.
25 is a front view of the guide pin of FIG. 25, FIG. 32 is a plan view of the thrust plate, FIG. 33 is a central longitudinal sectional view of FIG. 32, FIG.
FIG. 35 shows a conventional molding die and a mold releasing device. FIG. 34 is a central longitudinal sectional view, FIG. 35 is a plan view, FIG. 36 is a longitudinal sectional view showing another conventional molding die, and FIG. 42 to 42 are schematic configuration diagrams of a molding die and a mold releasing device for explaining a mold releasing step of a conventional three-piece mold releasing device. Explanation of symbols 1 ... Mold, 2 ... Upper mold 3 ... Medium mold, 4 ... Lower mold 41 ... Release pin hole, 42 ... Guide hole 43 ... Storage groove, 431 ... First groove wall 432 …… Second groove wall, 5 …… Fixing mechanism 51 …… Moveable hook, 511 …… Notch 512 …… Guide surface, 513 …… Engagement projection (engagement section) 514 …… Screw hole, 515… … First spring receiving hole 52 …… Spring, 53 …… Guide pin 54 …… Guide bush, 55 …… Blind lid 6 …… Cavity, 7 …… Piston 10 …… Molding die, 11 …… Upper die 12 …… Lower mold, 12a …… Release pin hole 12b …… Guide hole, 13 …… Metal fitting (nesting) 131 …… Head, 132 …… Cylindrical part 15 …… Fixing mechanism, 151 …… Movable hook 1511 …… Guide hole, 1512 …… Screw hole 152 …… Guide pin, 153 …… Spring 154 …… Spring case, 155 …… Bolt 156 …… Insertion hole, 16 …… Concave 17 …… Center hole, 18 …… Annular recess 19 …… Core, 20 ... ki Vity 25 …… Release pin, 26 …… Top plate 70 …… Mold release device, 71 …… Press cylinder 72 …… Lower heating plate 73 …… Piston fixing hook 74 …… Upper heating plate, 75 …… Upper mold fixing Hook 76 …… Mold loading / unloading cylinder, 77 …… Transfer roller 78 …… Upper mold holding means (projection top), 781 …… Bottom plate (base) 782 …… Arm, 783 …… Engagement 79 …… Top Mold push-up cylinder 80 …… Top plate, 81 …… Release pin (release part) 811 …… Tapered surface (pressing part), 82 …… Release pin (second)
83… Fixed hook 821 …… Tip surface, 822… Engagement protrusion A… Press side, B… Release device side R… Fixed position, F… Release position

Claims (1)

[Scope of utility model registration request] 1. An engaging portion having an upper die, a middle die, and a lower die, wherein the lower die slides only in a direction substantially orthogonal to a releasing direction to hold the middle die with respect to the lower die. A mold releasing device for releasing a mold having a pair of movable hooks each having a pair of movable hooks and an elastic means for pressing the pair of movable hooks toward the middle die side, and a fixed hook for holding the lower die. A base that moves in a direction opposite to the fixed hook, a pair of protrusions that are connected to the base and have the other end abutting the upper die, and the movable hook that is connected to the base and has the movable hook at the other end. A release portion having a pressing portion that opens outward against the generating means and has a body length shorter than the protrusion, and the other end abuts the middle die and is connected to the base, and the body length is shorter than the release portion. A mold release device having a second protrusion.