JPH0422411B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a mold device that has a simple structure, is light in weight, and can safely and quickly replace nested molds.

(Prior art) In mold equipment for plastic molds, etc., a plurality of nested molds for various molded products are exchangeably loaded onto a mold base in order to cope with high-mix, low-volume production. There is something.

Conventionally, in a mold device using this kind of nested mold, a nested mold insertion recess is bored in the mold mounting surface of the mold base, as disclosed in Japanese Patent Application Laid-Open No. 60-245512.
The nesting mold is loaded into the nesting mold insertion recess from the direction of the mold mounting surface, and the nesting mold is pressed by pressing means so that the two corresponding surfaces of the nesting mold come into contact with the two orthogonal surfaces of the nesting mold insertion recess. There is a mold device that positions and fixes the

(Problems to be Solved by the Invention) However, the above-mentioned conventional mold apparatus also had the following problems.

In other words, it is troublesome to accurately drill a nesting mold insertion recess on the mold mounting surface of the mold base, which increases manufacturing costs and complicates the mold structure. Since the thickness is required to be greater than the thickness of , there is a problem that the weight becomes large. Moreover, since the inserting direction of the nesting mold is from the parting surface, when inserting the nesting mold, it is necessary to insert the nesting mold into the fixed side and the movable side separately with the mold open, or to insert the nesting mold in a combined state. After the child mold is inserted into one mold base, the mold is closed and the other mold base is fixed, so that the insertion work is troublesome and involves dangerous work.

Furthermore, there is also the problem that nested types of different sizes cannot be used.

Therefore, the present invention has been made to solve the above problems, and its purpose is to provide a mold device that has a lightweight and simple structure and can safely and quickly replace nested molds. There is something to do.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes the following configuration.

That is, the guide member is located outside the reference line and is attached to the mold mounting surface, and the two surfaces are perpendicular to each other so that the reference surfaces are along the mutually orthogonal reference lines on the mold mounting surface. It is mounted on the mold mounting surface so as to abut on the guide member, and the corner in the direction opposite to the corner formed by the two surfaces that abut on the guide member has an obtuse angle with the parting surface. A nested mold formed on an inclined wall surface,
The contact slope formed so as to be able to come into contact with the sloped wall surface of the nesting mold can be moved between a position where it contacts the sloped wall surface and a position where it is removed from the sloped wall surface. a clamp piece that is movable along the inclined wall surface; and a fixing member that is provided on the mold mounting surface and presses the clamp piece in a direction that fixes the insert mold through the contact slope of the clamp piece. It is characterized by having the following.

(Operation) First, move the clamp piece to a position on the mold mounting surface where it does not interfere with insertion of the nested mold, and then insert the nested mold from above the space between the mold mounting surfaces of the movable mold and the fixed mold. do. Next, the clamp piece is moved so that the contact slope of the clamp piece is in a position where it can come into contact with the inclined wall surface of the nested mold, and then the clamp piece is pressed with a fixing member. The inclined wall surface of the nesting mold is pressed through the abutment slope of the clamp piece. As a result, the two corresponding surfaces of the nested mold are pressed against the reference surface of the guide member, and are also pressed in the direction of the mold mounting surface, so that the nested mold is finally positioned and fixed in three axial directions. The nested mold can be removed by reversing the above procedure.

Since it is sufficient to erect the guide member on the mold mounting surface, the apparatus can be simplified and costs can be reduced.

In addition, the nesting mold can be inserted from above (that is, in the lateral direction with respect to the mold), making it possible to replace the nesting mold with good work efficiency and safety.

Also, nested molds with different external sizes can be used.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is a front view of the movable mold seen from the parting surface, and FIG. 2 is a plan view of the mold apparatus.

In the figure, 10 is a movable type, and 12 is a fixed type. The movable mold 10 moves toward and away from the fixed mold 12.

A movable base 14 is fixed to a movable platen 15. Further, reference numeral 16 is a fixed base fixed to a fixed platen 17.

A movable nesting mold 1 is provided on the mold mounting surface of the movable mold base 14 and the mold mounting surface of the fixed mold base 16, respectively.
8. The fixed nesting mold 19 is installed.

When both nesting molds 18 and 19 are closed, a cavity 20 is defined, into which molten resin flows from the injection device 22 through a resin passage 21 provided in the fixed mold base 16 and the fixed nesting mold 19. Injected.

Reference numeral 23 denotes a protrusion pin for ejecting the molded product, which passes through the movable nesting die 18 and has its tip protruded into and out of the cavity 20. 24 is a protruding plate;
Guided by guide bolt 25, protruding rod 26
By being pressed by this, the protruding pin 23 is made to protrude into the cavity 20 and the molded product is dropped.

Note that 27 is a guide pin.

Subsequently, the above-mentioned nested molds 18 and 19 are attached to their respective mold bases (movable mold base 14, fixed mold base 1).
6) The mechanism to be attached will be explained.

Reference numerals 28 and 29 denote guide members in the shape of a rectangular parallelepiped, and as shown in FIG. are removably fixed by bolts 30 so as to be perpendicular to each other. That is, the inner surfaces of both guide members 28 and 29 serve as reference surfaces for positioning the movable nesting die 18, and the reference surfaces are set to be orthogonal to each other along reference lines A and B, respectively, which are orthogonal to each other. In the illustrated embodiment, both guide members 28 and 29 are formed by guide grooves 31 and 32 provided perpendicularly on the movable base 14.
Bolts 3 so that the bases fit inside each
It is fixed by 0. In this case, guide groove 3
The inner edges of lines 1 and 32 become reference lines A and B. Note that both guide members 28 and 29 are connected to the directly movable base 1.
It may be fixed on four sides.

A cooling water circuit 35 is formed in the movable nesting mold 18 , and the inlet and outlet ends of the cooling water circuit 35 form a cooling water passage bored into one (lower side) guide member 29 via a coupler 36 . connected to. A cooling hose 37 is connected to the cooling water passage.

One corner of the movable telescoping mold 18, that is, the corner diagonally to the corner formed by the wall surfaces in contact with both guide members 28, 29, is chamfered with an inclined wall surface 38. This inclined wall surface 38
is set so that the included angle with the parting surface of the movable nesting die 18 is an obtuse angle.

Further, a slide groove 39 having an L-shaped cross section is formed on the surface of the movable base 14, and a clamp piece 40 is slidably fitted into the slide groove 39 at its base. As is clear from FIG. 3, the clamp piece 40 has a slight clearance between it and the slide groove 39 so that it can move up and down a little. An abutting slope 41 is formed that abuts the inclined wall surface 38, and a slope 44 that abuts a slope 43 formed on the lower surface of the fixing member 42 is formed on the other end side.

The fixing member 42 is biased by a spring 45 and comes into elastic contact with the head of the tightening bolt 46. The tightening bolt 46 is screwed into a screw hole provided on the upper surface of the movable base 14, and by screwing it in, the fixing member 42 can be pushed down against the biasing force of the spring 45.

Next, the procedure for attaching the nested molds 18 and 19 will be explained. In addition, the fixed base 16 of the fixed nesting type 19
The mounting structure is also exactly the same as above.

First, loosen the tightening bolt 46 and tighten the clamp piece 40.
is free, and the clamp piece 40 is inserted into the slide groove 39.
1 to the dashed-dotted line in FIG. The clamp piece 40 is prevented from coming off the slide groove 39 by a stopper (not shown).

Next, move the movable platen 15 forward to a position slightly in front of the mold clamping position (approximately 0.5 mm), and insert the nested mold, which is a combination of the movable nested mold and the fixed nested mold, into the movable mold base 14 and the fixed mold base. 16 from above. Then, both nested molds are placed on the upper surface of the corresponding lower guide member 29.

Next, the clamp piece 40 is returned to the position corresponding to the nested inclined wall surface 38, and the clamp piece 40 is moved through the fixing member 42 by tightening the tightening bolt 46.
presses the inclined wall surface 38, so the movable nesting mold 18
and the fixed nesting mold 19 are both guide members 28, 2.
They are pressed in the direction of the reference plane 9 and come into contact with each other, and are positioned and fixed in the vertical and horizontal directions. At that time, the mold base of the double nested mold is also pressed in the surface direction, so
The space between the two nested molds is slightly opened, and each nested mold is pressed against the corresponding mold base surface, so that it is positioned and fixed in the thickness direction as well. In other words, both nested molds 18 and 19 are fixed in three axial directions. At the same time, since a coupler 36 is provided between the nesting molds 18, 19 and the lower guide member 29, a cooling water circuit 35 is also connected.

After that, the mold is completely clamped, and the tightening bolt 46 is further tightened to completely fix the mold in the thickness direction.

To remove the nesting molds 18 and 19, tighten the tightening bolt 4.
6 to free the clamp piece 40, move the clamp piece 40 to the dashed-dotted line, open the mold slightly (about 0.5 mm), and pull out the nested molds 18 and 19 upward. As a result, the cooling water circuit 3
5 is also opened, but the built-in valve of the coupler 36 prevents the cooling water from leaking.

In addition, to use nested molds with different external sizes,
This problem can be solved by changing the size (width) of both guide members 28 and 29 to correspond to the size of the nested mold. Alternatively, by preparing various clamp pieces 40 with different positions of the abutting slopes 41 that press the inclined wall surfaces 38 of the nesting molds, nesting molds of different external sizes can be loaded.

In the above embodiment, the fixing member 42 is tightened by the bolt 46.
The fixing means can be changed as desired, such as using a hydraulic cylinder or the like, or using a cam structure for the clamp piece.

Further, by arranging the guide members in a T-shape or a cross-shape, for example, a nested type such as two or four sets can be used.

Furthermore, as shown in FIG.
It is also possible to use a large number of sets 18b by engaging them in a concave and convex manner between wall surfaces.

5 and 6 show other embodiments. The same members as in the previous embodiment are given the same reference numerals, and their explanations will be omitted.

In this embodiment, unlike the previous embodiment, a mold base (movable base, fixed base) is not used, and the opposing surfaces of the movable platen 15 and fixed platen 17 are directly used as mold mounting surfaces, and this mold Guide member 28 on the mounting surface,
29, and a fixing means including a slide groove 39, a clamp piece 40, and a fixing member 42 is provided.

According to this embodiment, the mold structure can be further simplified, and the surfaces of the movable platen 15 and the fixed platen 17 can be fully utilized to allow installation of large-sized nested molds.

In addition, 50 is a tie bar, 51 is a mold clamping cylinder,
52 is a mold clamping ram.

The present invention has been variously explained above with reference to preferred embodiments, but the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. That's true.

(Effect of the invention) As described above, according to the mold device according to the present invention,
The structure of the entire device is simplified, making it lighter in weight, easy to process, and reducing costs. The workability of replacing the nested mold is good, it can be replaced quickly and safely, and the replacement of the nested mold can be easily automated. Furthermore, since there are fewer obstacles when inserting the nesting mold, it is possible to use a larger nesting mold than before, and it is also possible to use nesting molds of various sizes.

[Brief explanation of drawings]

1 is a front view of the movable mold seen from the parting surface direction, FIG. 2 is a plan view of the mold apparatus, and FIG. 3 is a sectional view taken along the line A--A in FIG. 1. FIG. 4 is a front view of another embodiment, and FIGS. 5 and 6 are still further embodiments, with FIG. 5 being a plan view thereof, and FIG. 6 being a front view of its movable type. 10...Movable type, 12...Fixed type, 14...Movable base, 15...Movable plate, 16...Fixed base, 17...Fixed plate, 18...Movable nested type, 1
9...Fixed nesting type, 20...Cavity, 21...
... Resin path, 22 ... Injection device, 23 ... Projection pin, 24 ... Projection plate, 26 ... Projection rod, 27
... Guide pin, 28, 29 ... Guide member, 3
0... Bolt, 31, 32... Guide groove, 35...
Cooling water circuit, 36... Coupler, 37... Cooling hose, 38... Inclined wall surface, 39... Slide groove,
40...Clamp piece, 41...Abutment slope, 42...
... Fixed member, 43 ... Slope, 44 ... Slope, 45
... Spring, 46 ... Tightening bolt, 18a,
18b... Nested type.

Claims (1)

[Scope of Claims] 1. A guide member located outside the reference line and mounted on the mold mounting surface so that the reference planes are along mutually orthogonal reference lines on the mold mounting surface, and mutually The mold is mounted on the mold mounting surface so that the two orthogonal surfaces contact the guide member, and the corner in the direction opposite to the corner formed by the two surfaces contacting the guide member is the parting surface. A nesting mold formed on a sloped wall surface with an obtuse included angle, and a position where the contact slope formed so as to be able to come into contact with the sloped wall surface of the nesting mold contacts the sloped wall surface and a position where it deviates from the sloped wall surface. a clamp piece provided so as to be movable on the mold mounting surface along the inclined wall surface so as to be able to move between the clamp pieces; and a fixing member that presses a clamp piece in a direction to fix the insert die.