JPH08229618A - Forming die device - Google Patents

Abstract

PURPOSE: To prevent wear due to eccentricity in both faces of joining parts because the guide pin and guide bush for positioning and guiding the attaching plates of forming dies are slid over each other and also joining parts for positioning the combination of the forming dies are simultaneously joined. CONSTITUTION: In a forming die device having split dies and the guide pin or the guide bush on a pair of the attaching plates, one split die 15 and the other split die 15 have the positioning/joining part for positioning the forming cavity 16, elastic supporting parts 20 are provided in at least one between surfaces formed by holes 3, 4 of the attaching plates fit the split dies 15 or the fitting surfaces 8, 9 of the split dies 15 or the guide pin 6 or the guide bush 7 and the fitting surfaces having the elastic supporting parts 20 is made into loose fit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die device.
More specifically, the present invention relates to a molding die device in which the joining surfaces of the divided movable die and fixed die are assembled accurately and comfortably.

[0002]

2. Description of the Related Art In the prior art of the present invention, there is a molding die apparatus having a molding die as shown in FIG.

FIG. 6 shows an upper mounting plate 51 on which an upper mold 52 is mounted.
FIG. 8 is a side view of a molding die apparatus in which a lower attachment plate 58 having a lower die 59 attached thereto is combined. In FIG. 6, the upper and lower mounting plates 51 and 58 are made of a metal material, and have flat planes. The upper mounting plate 51 has a mounting hole 53 in which the upper mold 52, which is one of the molding dies, is mounted. Further, fitting holes 55 to which the guide pins 60 are attached are provided at four corners.

A step portion 56 formed on the upper die 52 is fitted in the attachment hole 53 of the upper attachment plate 51, and is stopped by a retaining ring 57 provided on the upper die so as not to move relatively.

The upper mold 52 and the pair of lower molds 59 are also the upper mold 5.
As in the case of 2, the step portion 56 is fitted in the mounting hole 53 of the lower mounting plate 58, and the retaining ring 57 is provided on the lower side to prevent the relative movement. In addition, the mounting holes 53 of the upper and lower mounting plates 51 and 58 and the step portions 56 of the upper mold 52 and the lower mold 59 are fitted in a snug fit.

Further, guide pins 60 are fitted into the fitting holes 55 of the upper mounting plate 51 provided at four places in a snug fit. Then, the retaining ring 62 is engaged with the upper side, and the guide pin 60 is stopped so as not to move.

Further, a guide bush 61 is fitted into the fitting hole 55 of the lower mounting plate 58 by a snug fit. A retaining ring 62 is provided on the lower side of the guide bush 61.
Have been stopped so that they will not move.

Further, the upper die 52 and the lower die 59 are provided with a tapered joint surface 64 so that the molding cavity 63 can be accurately positioned when assembled.

In the molding die apparatus constructed as described above, the upper die 52 moves to the lower die 59 and is joined thereto, and the dough 54 is compressed and molded. Therefore, the upper mounting plate 51 moves downward. At this time, the guide pin 60 is inserted into the guide bush 61 attached to the lower attachment plate 58 to guide this movement. Next, the bonding surface 64 of the upper mold 52 and the bonding surface 64 of the lower mold 59 are bonded to each other so that the molding surfaces of the upper and lower molding cavities 63 are accurately combined.

[0010]

However, in the combination of the upper mold 52 and the lower mold 59, the upper mounting plate 51 is
Since the upper die 52 and the guide pin 60 are fitted to the upper fitting plate 51 and the lower die 59 and the guide bush 61 are fitted to the lower fitting plate 58, the upper fitting plate 51 and the lower fitting plate 58 are fitted to the upper fitting plate 51. The mounting hole 53 with the lower mounting plate 58 and the fitting hole 55 must be further processed so as to be on the same center line.
This processing is difficult because it becomes highly accurate. Further, even if the mounting holes 53 and the fitting holes 55 are processed so as to be on the same center line, the upper mounting plate 51 and the lower mounting plate 58 are deformed because they are subjected to stress during molding, and their positions at the time of processing. Relationships can change.

Since the upper mold 52 and the lower mold 59 are heated for molding, the dimensional relationship also changes from this point. Therefore, when the guide pin 60 and the guide bush 61 are fitted together and the joining surface 64 of the upper die 52 and the lower die 59 is attempted to fit, either joining surface is galled, and finally the joining surface is It will be worn and the molding cavity 63 will be formed defectively.

The present invention has been made in view of the above-mentioned problems, and its technical problem is that even if the upper and lower mounting plates are guided by guide pins, the upper and lower joining surfaces are joined together. The purpose is to form a molding cavity accurately for a long period of time without causing abrasion.

[0013]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned technical problem, and the technical means is constituted as follows. That is, the first mounting plate having one mounting hole and the fitting hole, the other mounting hole and the other mounting hole that are arranged substantially parallel to the first mounting plate and face the one mounting hole and the fitting hole. And a second mounting plate having a mounting surface fitted in one mounting hole of the first mounting plate, and in the other mounting hole of the second mounting plate facing the one mounting mold. Opposed to the other split mold with the fitting surface fitted, the guide pin with the fitting surface fitted into one fitting hole of the first mounting plate, and the guide hole formed so that it can be fitted into the guide pin. The other fitting hole of the second mounting plate is provided with a guide bush in which the other fitting surface is fitted, and a positioning joining surface for determining the position of the molding cavity when one split die and the other split die are joined. Mounting holes or fitting holes that are fitted to the mounting surface or fitting surface of the split type, guide pin, or guide bush An elastic support part on at least one between the forming surface, and is obtained by between mating surfaces having a resilient support portion loosely fitted.

[0014]

The pair of the first mounting plate and the second mounting plate move toward each other to set one split mold and the other split mold. At this time, the guide pin and the guide bush are fitted to each other so that the one split mold and the other split mold are joined to each other at correct positions. If there is eccentricity with the split die shaft core, the elastic support portion interposed between the fitting surfaces of the mounting hole and the split die or between the fitting holes and the fitting surface of the guide pin or the guide bush, The eccentricity is absorbed, and the joining surfaces of the split molds are joined accurately and reasonably to form the molding cavity accurately.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a molding die apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 is a half sectional view of a molding die apparatus according to the first embodiment of the present invention. 2 shows the first mounting hole 3a.
FIG. In FIG. 1, reference numeral 2 is a first mounting plate. The first mounting plate 2 has four first mounting holes 3a for mounting the first split mold 15a and a first guide pin 7.
Four first fitting holes 4a for mounting a are formed. The mounting hole 3 is composed of a first mounting hole 3a and a second mounting hole 3b. The fitting hole 4 is composed of first and second fitting holes 4a and 4b, which are not shown in the whole.

A second mounting hole 3b and a second fitting hole 4b are also formed in the second mounting plate 5 at the same positions as the first mounting plate 2. Then, in the second fitting hole 4b of the second mounting plate 5, a fitting groove 19 for mounting the elastic support portion 20 is provided in each.

The mounting holes 3 are provided in the same number as the number of the molding dies 15. In the multi-cavity molding of the present invention, 2 to 24 cavities are taken. Moreover, the number of the fitting holes 4 is not limited to four, but is set according to positioning such as two, three, and so on.

Next, the molding die 15 is composed of a pair of first and second split dies 15a and 15b. The split molds are combined to form the molding cavity 16 inside. Further, on the outer peripheral side of the molding cavity 16, taper-shaped joining surfaces 17a, 17 for positioning the molding cavity 16 are formed.
b is formed. The outer peripheral surface has a mounting surface 8 formed on the step. Mounting surface 8 of first split mold 15a
Two mounting grooves 18 for the elastic support portion 20 are formed in a. A stop groove 21 for the retaining ring 12 that prevents the movement of the first mounting plate 2 is provided on the lower side thereof. The first split mold 15a has two mounting grooves 18
The O-ring-shaped elastic support portions 20 made of a rubber material are fitted into the first mounting holes 3a of the first mounting plate 2, respectively. This fitting is loose fitting. In addition, in the stop groove 21, the first split mold 15a and the first mounting plate 2 are attached.
A retaining ring 12 is provided to hold the connection with the. In this embodiment, the clearance between the first mounting hole 3a and the first mounting surface 8a is 0.6 mm, and the clearance between the second fitting hole 4b and the guide bush is 0.3 mm. If necessary, this gap was set to 0.2 to 1.2 mm.

The second split mold 15b is also attached to the second mounting plate 5 with the same structure as the first split mold 15a. The second split mold 15b is replaced by the first split mold 15a.
The mounting structure different from that is that the elastic supporting portion 2 is provided on the second mounting surface 8b.
That is, it is fitted into the second mounting hole 3b of the second mounting plate 5 in a snug fit without mounting 0.

The first mounting plate 2 and the second mounting plate 5
The split dies 15a and 15b attached to the two are opposed to each other and are attached concentrically. The first mounting plate 2 is attached to a moving device (not shown) to
It is configured to move relative to the mounting plate 5 and to face the front surface while being inclined at a certain angle.

A first fitting surface 9a of the guide pin 6 is fitted in the first fitting hole 4a of the first mounting plate 2.
Then, the retaining ring 12 is provided in the stop groove 21 of the guide pin 6.
Is fitted, and the guide pin 6 is stopped so as not to come out.

Further, the second fitting surface 9b of the second mounting plate 5 is loosely engaged with the second fitting surface 9b of the guide bush 7. A ring-shaped elastic support portion 20 made of a rubber material is fitted in the fitting groove 19 of the second mounting plate 5. or,
A retaining ring 12 is fitted in the stop groove 21 of the guide bush 7 and is locked so that the guide bush 7 does not come out.

The guide pin 6 and the guide hole 13 of the guide push 7 are slidably engaged with each other, and are attached to the first mounting plate 2 and the second mounting plate 2.
To guide the mounting plate 5 to move in parallel. For this reason, in the embodiment, the guide pins 6 and the guide bushes 7 are provided at the four corners of the mounting plates 2 and 5, respectively. The elastic support portion 20 is made of a rubber material, a resin material, a metal material, or the like, and can be formed in a cross section of O-shape or square shape in the case of a polymer, or an O-ring coil spring in the case of a metal material,
It can be formed into a leaf spring.

The first embodiment constructed as described above is
The second mounting plate 5 is mounted on a fixed platen (not shown). On the other hand, the first mounting plate 2 moves to a position above the second mounting plate 5 by a moving device (not shown), and the molding surface of the first mounting plate 2 moves toward the front so that the molded product can be easily taken out. It is designed to incline. When molding, the first split mold 15a attached to the first mounting plate 2 moves toward the second split mold 15b and is joined thereto. At this time, the first mounting plate 2 is guided by the joint guide between the guide pin 6 and the guide bush 7. Further, when the first split mold 15a comes close to the second split mold 15b, the joining surfaces 17a and 17b of the tapered surfaces provided on the first and second split dies 15a are further guided and joined to position the molding cavity 16. If there is a gap between the center line of the molding die 15 and the center lines of the guide pins 6 and the guide bushes 7, the elastic support portion 20 absorbs the gaps. Joining surface 17 which the split mold 15a of the second split mold has on the second split mold 15b
Finally, a and 17b are joined to form the molding cavity 16 accurately. Therefore, there is no excessive pressure contact between the joint sliding surfaces, and it is possible to prevent wear and galling.

FIG. 3 is a sectional view of the essential parts of a molding die apparatus according to the second embodiment of the present invention.

In FIG. 3, reference numeral 2 is a first mounting plate.
The first mounting plate 2 is provided with a plurality of first mounting holes 3a and first fitting holes 4a, and two fitting grooves 19 are provided in each of the first fitting holes 4a. Has been.

Further, the second mounting plate 5 is also attached to the first mounting plate 2
A second mounting hole 3b and a second fitting hole 4b are provided at the same positions as. The second mounting plate 5 is provided with a set hole 11 so that it can be mounted on a stationary platen (not shown).

The intermediate third mounting plate 10 also has a third mounting hole 3c and a third fitting hole 4 at the same position as the first mounting plate 2.
c is provided. Then, in the third mounting hole 3c,
A mounting groove 18 is formed.

Split dies 15a, 15b, 15c are fitted in the mounting holes 3a, 3b, 3c of the above-mentioned respective mounting plates 2, 5, 10 with the same construction as in FIG. However, the third
The mounting hole 3c and the third split mold 15c are fitted in a loose fit state, and the elastic support portion 20 is fitted in the mounting groove 18.

Further, guide pins 6 and guide bushes 7 are attached to the fitting holes 4 formed in the attachment plates 2, 5 and 10, as in FIG. The elastic support member 20 is provided in the fitting groove 19 provided in the first fitting hole 4a and the second fitting hole 4b.
Is installed.

The molding die 15 is composed of first, second and third split dies 15a, 15b and 15c. Third
The split mold 15c has a molding surface facing the molding surface of the first split mold 15a and a molding surface facing the molding surface of the third split mold 15c on the upper and lower surfaces. Further, on the outer peripheral side of the molding surface, the upper bonding surface 1 that is bonded to the bonding surface 17a of the first split mold 15a.
7c and a lower joint surface 17c that joins the joint surface 17b of the second split mold 15b.

The molding die apparatus of the second embodiment is moved by the fitting guide between the guide pin 6 provided on the first and second mounting plates 2 and 5 and the guide bush 7 provided on the third mounting plate 10. The molding cavities (not shown) are positioned close to each other and are molded by the respective bonding surfaces 17a, 17b, 17c. At this time, the elastic supporting portions 20 provided in the mounting grooves 18 and the fitting grooves 19 prevent wear and galling of the joint surfaces caused by the eccentricity of the centers of the joint surfaces 17 and the centers of the guide pins 6 and the guide bushes 7. The purpose is to prevent defective products.

FIG. 4 is a sectional view of the essential parts of a molding die apparatus according to the third embodiment of the present invention.

FIG. 4 is a view showing the fitting state of the guide pin 6 and the guide bush 7 of the molding die device of the present invention, in which the left side of the center line is a cross-sectional view of the fitting and insertion, and the right side is the fitting and releasing. In FIG. 4, the guide pin 6 is provided with two fitting grooves 19 on the first fitting surface 9a.

Elastic fitting portions 20 each of which is composed of a ring-shaped leaf spring having a C-shaped cross section are fitted in the fitting groove 19. There is a loose fit between the first fitting hole 4a in which the elastic support portion 20 is mounted and the first fitting surface 9a. Although this clearance gap is set to 1.0 mm, this gap is not limited to 1.0 mm, and is set to 0.2 to 1.5 mm as required. Further, depending on the configuration of the elastic support portion 20, 0.2 mm to 2.2 m
You may form in the gap of m. The elastic support portion 20 can be formed of a rubber material, a resin material, spring steel, or the like, and can be formed in the shape of an O-ring, a square ring, a leaf spring, or an O-ring-shaped garter spring.

FIG. 5 is a plan view of a mounting plate of a molding die apparatus according to the fourth embodiment of the present invention. In FIG. 5, the mounting hole 3 is provided with mounting grooves 18 at six locations on its peripheral surface, and the elastic supporting portions 20 are mounted in the mounting grooves 18.
The elastic support portion 20 is attached with a rectangular cross section made of rubber or resin. And the inner diameter is 2 from the mounting hole 3.
It is formed with a small diameter of mm. The difference between the diameter of the mounting hole 3 and the diameter of the elastic support portion 20 is not limited to this,
The range may be 0.2 to 2.5 mm.

[0038]

In the molding die apparatus of the present invention, the split dies are combined to form the molding cavity. When the split dies are combined and molded, they are guided by the guide pins and the guide bushes. However, since it is necessary to provide the mounting plate with a combination of a plurality of guide pins and guide bushes, it is difficult to machine all the guide pins and guide bushes concentrically. Further, even if the cores can be processed into the same core, the space between the shaft cores is deformed by repeated compression molding. Further, the mounting plate is deformed between the shaft cores due to thermal deformation during molding.

The eccentricity between the shaft cores is absorbed by the elastic supporting portion provided in the fitting groove, and the fitting sliding surface between the guide pin and the guide bush is prevented from being worn and causing the occurrence of burrs or burrs on the molded product. To do.

Further, when the split dies are joined, a tapered joining surface is provided for positioning the molding cavity. However, if the axis of the joining surface and the axis of the guide pin and the guide bush are eccentric, the joining is achieved. The surface becomes worn, resulting in poor molding. However, since the elastic support portion is provided between the fitting surfaces of the mounting plate and the molding die, this eccentricity can be prevented and a good product can be molded.

Particularly, when a large number of split dies are attached to the mounting plate, it is almost impossible to eliminate the eccentricity between the shaft centers of the split dies. However, since the elastic supporting portion is provided between the mounting hole of the mounting plate and the mounting surface of the split mold, this eccentricity can be absorbed and the molding cavity can be accurately positioned and formed.

Further, when two pieces are molded by a pair of molding dies with a middle mold interposed between the split molds, eccentricity often occurs between the split molds, but as in the present invention, the mounting plate is mounted. By interposing an elastic support ring between the mounting surface or the mating surface of the mating hole or the fitting hole, this eccentricity is prevented and the positioning joint surface of the molding cavity is effectively prevented from being worn. You can As a result, the durability of the molding die can be improved, and defective molding can be effectively prevented.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a molding die apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part of a molding die apparatus according to an embodiment of the present invention.

FIG. 3 is a sectional view of an essential part of a molding die apparatus according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of a guide pin and a guide bush of a molding die device according to a third embodiment of the present invention.

FIG. 5 is a plan view of a mounting plate of a molding die apparatus according to a fourth embodiment of the present invention.

FIG. 6 is a cross-sectional view of a conventional molding die device.

[Explanation of symbols]

 1, 50 ... Molding apparatus 2 ... First mounting plate (board plate) 3, 53 ... Mounting hole 3a ... First mounting hole 3b ... Second mounting hole 3c ... Third mounting Hole 4, 55 ... Fitting hole 4a ... First fitting hole 4b ... Second fitting hole 4c ... Third fitting hole 5 ... Second mounting plate 6, 60 ... Guide Pins 7, 61 ...... Guide bush 8 ...... Mounting surface 8a ...... First mounting surface 8b ...... Second mounting surface 8c ...... Third mounting surface 9 ...... Mating surface 9a ...... First fitting Mating surface 9b ... Second fitting surface 9c ... Third fitting surface 10 ... Third mounting plate (board plate) 11 ... Set hole 12, 57, 62 ... Retaining ring 13 ... Guide Hole 15 ... Mold 15a ... First split mold 15b ... Second split mold 15c ... Third split mold 16, 63 ... Mold cavity 17, 17a, 17b, 17c, 64 ... Mating surface 18 ...... Mounting groove 19 ...... Mating groove 20 ...... Elastic support portion 21 ...... Stop groove 51 ...... Upper mounting plate 52 ...... Upper mold 54 ...... Dough 56 ...... Step portion 58 ...... Lower mounting plate 59 ...... Lower mold

Claims (1)

[Claims] 1. One mounting hole (3a) and one fitting hole (4a)
A first mounting plate (2) having and one mounting hole (3a) arranged substantially parallel to the first mounting plate (2)
And a second mounting plate (5) having the other mounting hole (3b) facing the fitting hole (4a) and the fitting hole (4b), and the first mounting plate (5).
Mounting plate (2) to one mounting hole (3a) of the mounting surface (8
(a) is fitted in one split mold (15a), and the mounting surface (8b) is provided in the other mounting hole (3b) of the second mounting plate (5) so as to face the one split mold (15a). The other split mold (15b) fitted, the guide pin (6) having the fitting surface (9a) fitted in one fitting hole (4a) of the first mounting plate (2), and the guide pin (6). 6) A guide bush having a guide hole (13) formed so that it can be inserted and fitted into the other fitting hole (4b) of the second mounting plate (5) and a fitting surface (9b) fitted therein. (7) is provided, and the one split type (15
Positioning joint surface (1) that determines the position of the molding cavity (16) when the a) and the other split mold (15b) are joined.
7), and the mounting hole (3) fitted with the mounting surface (8) or the mounting surface (9) of the mold (15), the guide pin (6), or the guide bush (7). )
Alternatively, the molding is characterized in that at least one of the fitting hole (4) forming surfaces has an elastic supporting portion (20), and the fitting surfaces having the elastic supporting portion (20) are loosely engaged with each other. Mold device.