JPH01176535A - Mold base and its use - Google Patents

Abstract

PURPOSE:To provide a general-purpose mold base usable for various kinds of structures, by preparing a runner stripper plate mounted on a fixed head die plate so as to allow them to overlap together and a retainer plate, and a stripper plate mounted on said retainer plate so as to allow them to overlap together. CONSTITUTION:This mold base can be used as a mold of two-plate type by disusing a runner stripper plate 16 and a stripper plate 21 and combining a fixed head die plate 11 with a retainer plate 18; as a mold of two plate and stripper projection type by disusing said runner stripper plate 21 and combining said fixed head die plate 11 with said retainer plate 18; as a mold of three-plate, type by disusing said stripper plate 21; and as a mold of three-plate and stripper projection type by using all said plates. Therefore, the general purpose use of one mold is possible as various types of mold structure, preparing a mold guide mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mold base that can accommodate various mold structures and a method of using the same.

(Conventional technology and its problems) Generally, synthetic resin molding molds are manufactured for each molded product.
Materials are also arranged accordingly.

However, in order to shorten the mold delivery time and reduce costs, mold material manufacturers have begun to manufacture and sell standard mold bases made by combining multiple plate-processed mold plates.

More recently, mold bases with a template guide mechanism pre-installed have become available on the market.

By the way, there are two types of molding molds: a two-plate type that releases the molded product and the runner branch, which is a resin path, as one unit, and a three-plate type that uses a pinpoint gate to cut the molded product runner when the mold is opened. There are two methods for ejecting the molded product: one using an ejecting pin and the other using a stripper plate.

A two-plate type mold requires guide pins to position the fixed mold and movable mold.

In a two-plate type mold with a stripper plate protrusion method, a guide pin is required on the movable mold to position the guide of the stripper plate and the fixed mold.

In a 3-plate type mold, there is a fixed mold, a fixed side mold plate,
A guide pin is required to position the guide of the runner stripper plate and the movable mold.

In addition, in the case of a 3-plate type mold with a stripper plate protrusion method, a guide pin is required on the fixed mold to guide the fixed side mold plate and the runner stripper plate.
The movable type also requires a guide pin for positioning the stripper plate guide and the fixed type, so it is necessary to prepare two types of guide pins.

Conventionally, as the template guide mechanism differs for each mold structure as mentioned above, it was necessary to prepare many types of mold bases incorporating template guide mechanisms according to each mold structure, resulting in high costs. Along with this, various types of management such as inventory management and manufacturing management become complicated.

The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a standard mold base that can be used universally for various mold structures and a method for using the same.

(Means for Solving the Problems) The present invention according to the above object includes a fixed side mounting plate having a guide pin erected on one diagonal portion, and a fitting hole into which the guide pin is inserted. A runner stripper plate and a fixed side mold plate provided in an overlapping portion on the fixed side mounting plate and a guide pin free through hole are provided at a position opposite to the guide pin, and the free through hole is provided. A stripper plate 1 is provided with a stripper guide pin erected at a diagonal portion opposite to the diagonal portion, and the guide pin is inserted into a free through hole so as to be superimposed on the fixed side template; a movable side mold plate that is provided so as to be superimposed on the stripper plate and has a fitting hole into which each guide pin is inserted at a position opposite to the guide pin and the stripper guide pin; A spacer block having loose through holes in opposing positions into which guide pins are loosely inserted, and is provided so as to be stackable on the movable side template; and a movable side mounting plate that is stackable on the spacer block. It is a feature.

(Function) The mold base according to the present invention can be used as a two-plate type mold by eliminating the runner stripper plate and the stripper plate and combining the fixed side mounting plate and the fixed side mold plate (Figs. 4 and 5). By removing the runner stripper plate and combining the fixed side mounting plate and the fixed side mold plate, it can be used as a two-plate type mold with a stripper protrusion method (see Figures 6 and 7). By removing the stripper plate, it can be used as a 3-plate mold (see Figures 8 and 9).
By using all the members, it can be used as a 3-plate type mold with a stripper protrusion type (see Figures 10 and 11).

Therefore, although it is equipped with a template guide mechanism, it can be used universally as a mold base for molding dies having various mold structures by simply preparing one type of mold base.

(Embodiment) A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a sectional view of a mold base 10 according to the present invention.

In the figure, reference numeral 11 denotes a fixed side mounting plate, and its four corners are provided with two-stage holes 12 formed in two stages, as shown in FIG. Step hole 12
A guide pin 13 is press-fitted into. Note that the two two-stage holes located at the other diagonal corners are not necessarily provided.

In addition, counterbore holes 14 are provided in the upper and lower 2 (18 locations).

The fixed side mounting plate 11 attaches the fixed mold to the fixed platen 15 on the molding machine side (
(Fig. 4).

Reference numeral 16 denotes a runner stripper plate, which is provided with an insertion hole 17 in which a guide bushing is press-fitted at the same position as the two-step hole 12 of the fixed side mounting plate 11, and the two guide pins 13
is guided by and superimposed on the fixed side mounting plate 11.

Reference numeral 18 is a fixed side template, which also corresponds to 2 of the fixed side mounting plate 11.
Insertion hole 1 with a guide bushing press-fitted at the same position as stepped hole 12
9 is provided, and is guided by a guide pin 13 and superimposed on the runner stripper plate 16. Further, a screw hole 20 is bored in the fixed side mold plate 18 at a position opposite to the counterbore hole 14 of the fixed side mounting plate 11.

21 is a stripper plate, which is connected to the guide pin 1 above.
A free through hole 22 with a larger diameter than the guide pin 13 is bored at a position opposite to the guide pin 13, and a two-step hole is formed in the diagonal portion opposite to the diagonal portion where the free through hole 22 is provided. is provided, and these two
A stripper guide pin 23 having the same diameter as the guide pin 13 is press-fitted into the step hole and overlapped with the stationary template 18. The stripper guide pin 23 projects toward the movable mold plate.

Reference numeral 24 designates this movable side template, and a fitting hole 25 into which a guide bushing is press-fitted is provided at a position facing the guide pin 13 and the stripper guide pin 23.
It is guided by the stripper guide pin 23 and superimposed on the stripper plate 21.

The movable side template plate 24 is integrally connected to the movable side mounting plate 28 by bolts 29 serving as connection means via two spacer blocks 27 having loose fitting holes 26 for the guide pin 13 and the stripper guide pin 23. Two protruding plates 30 are provided in the space between the two spacer blocks 27. The movable side mounting plate 28 attaches the movable mold to the movable platen 31 (fourth
(see figure).

Although it is convenient for handling that the movable side mold plate 24, spacer block 27, and movable side mounting plate 28 are integrated in advance with the port 29, it is not necessary to integrate them in advance, and the molding It may also be assembled during processing as a mold.

Next, how to use the mold base having the above structure will be explained.

[1] When applied to a 2-plate type molding die with a pin protrusion method (Figures 4 and 5).

In this case, the runner stripper plate 16 and stripper plate 21 are not used. Therefore, from the mold base lO to the runner stripper plate 1
6 and the stripper plate 21 are removed.

A cavity 34 is carved in the stationary template 18, and a resin path 35 leading to the cavity 34 is formed in the stationary template 18 and the stationary mounting plate 11. The stationary side mold plate 18 and the stationary side mounting plate 11 are integrally coupled with bolts 36 using the counterbore holes 14 and screw holes 20 to form a stationary mold 37.

Although it is convenient to provide the counterbored holes 14 and the tapped holes 20 at the stage of forming the mold base 10, they may also be provided at the time of assembling the molding die.

On the other hand, on the movable mold side, a core 38 that determines the inner surface shape of the molded product is attached to the movable mold plate 24, and a molded product ejecting device is provided to form a movable mold 39. This molded product ejecting device is constructed by inserting a protruding pin 40 erected in a protruding plate 30 into a protruding hole provided in a core 38, and urging the protruding plate 30 to move backward by a spring 41.

As described above, each member is processed and assembled, attached to a molding machine, and used as a molding die.

The fixed mold 37 and the movable mold 39 are positioned by guide pins 13. Note that the guide pin 13 is attached to the fixed side mounting plate 11.
The guide pins may also be press-fitted into the other two two-stage holes 12 provided in the guide pins 12 and used as a total of four guide pins.

[2] When applied to a 2-plate type molding mold with a stripper protrusion method (Figures 6 and 7).

In this case, the runner stripper plate 16 is not used. Therefore, the runner stripper plate 16 is removed from the mold base 10.

Then, as in the previous case, the fixed mold 37 is inserted into the cavity 34.
, a resin path 35 is provided, and the fixed side mold plate 18 and the fixed side mounting plate 11 are connected by a pole I.36.

The core 38 is attached to the movable mold 59 side in the same manner as described above, and a molded product ejecting device is also provided. In this case, the molded product ejection device connects the ejection plate 30 and the stripper plate 21 with a connecting rod 43, and releases the molded product from the movable mold by the stripper plate 21 (Fig. 7).
. The stripper plate 21 is provided with a hole for inserting the core 38 therein.

In this mold, the stripper plate 21 is guided by two diagonal stripper guide pins 23 that are inserted into insertion holes 25 provided in the movable mold plate 24, and the fixed mold 37
The movable mold 39 is positioned and guided by the other two diagonal guide pins 13.

Note that the stripper guide pin 23 projects in the direction of the movable mold plate 24 and does not project at all on the surface of the stripper plate 21 facing the fixed mold, so that the molded product will not be caught when it falls.

[3] In the case where the 3-plate type is applicable to a pin protrusion type mold (Figures 8 and 9).

In this case, the stripper plate 21 is unnecessary and is removed from the mold base 10.

Then, a cavity 34 is formed in the fixed side mold plate 18, and a resin path 35 communicating with the cavity 34 is provided across the fixed side mold plate 18, the runner stripper plate 16, and the fixed side mounting plate 11. Further, a runner lock pin 44 for locking the runner technique is provided upright on the fixed side mounting plate 11 and is inserted into an insertion hole provided in the runner stripper plate 16.

The core 38 is attached to the movable mold 39 side, and the 2 of [1]
A molded product ejection device similar to that for the plate type is provided.

Also, although not shown, there are gaps between the movable side template 24 and the fixed side template 18 of the movable type, between the fixed side template 18 and the runner stripper plate 16, and between the runner stripper plate 16 and the fixed side mounting plate 11. In between, a limiting means consisting of a plastic plate I for stroke limiting, a limiting pin, a chain, a link, etc. is provided. As a result, when the mold is opened, the space between the movable mold plate 24 and the fixed mold plate 18 is first opened, and the molded product adheres to the core 38 side. Next, the space between the stationary template 18 and the runner stripper plate 16 is opened, and the runner remains on the runner stripper plate 16 side by being locked by the runner lock pin 44. Next, runner 1 - lymph plate 16 and fixed side mounting plate 1
1 opens, and the runner technique is released from the mold.

The molded product is released from the mold by a molded product ejection device. - runner stripper plate 16, fixed side template 18,
The movable mold 39 is guided and positioned by guide pins.

Note that four guide pins 13 can also be used in this case.

[4] When applied to a 3-plate type molding mold with a stripper protrusion method (Figures 10 and 11).

In this case, all members of the mold heir 10 are used.

Then, similarly to the above, the fixed mold 37 forms the cavity 34 in the fixed side template 18, and connects the resin path 35 to the fixed side template 1B.
, runner stripper plate 16, fixed side mounting plate 1
1, and a runner lock pin 44 is attached thereto.

A core 38 is attached to the movable mold 39 side in the same way as the two-plate type in [2], and a molded product ejecting device is also attached.

Further, the movable template 24, the fixed template 18, the runner stripper plate 16, and the fixed mounting plate 11 are connected by a limiting means such as a limiting bolt for stroke limitation in the same manner as described above.

As a result, the runner stripper plate 16, fixed mold plate 18, and movable mold 39 are guided and positioned by the two diagonal guide pins 13.

Further, the stripper plate 21 is guided by the movable mold plate 24 by two stripper guide pins 23 located diagonally opposite to the guide pins.

In addition, in any case of each type structure of (1) to [4] above,
Of course, a cooling circuit, a slide core, and other necessary configurations may be adopted as appropriate.

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) According to the present invention, one type (7) regardless of the mold structure.
Since all you need to do is prepare a mold base, costs can be reduced, inventory management and manufacturing management can be simplified, and standardization can be further improved, which can shorten the delivery time for molded parts.

Furthermore, according to the present invention, there are no protrusions such as guide pins on the stripper plate surface when the molded product is ejected by the stripper, making it easier to drop, take out, and insert the released molded product; and insert the object. can be done.

[Brief explanation of the drawing]

The figures show a preferred embodiment of the present invention, in which FIG. 1 is a cross section of a mold heath, a sectional view taken along line B-B in FIG. 2, and FIG. 2 is a view taken along arrow A in FIG. 1. shows. Fig. 3 is a cross-sectional view showing the separated state of each member of the mold base, Figs. 4 and 5 show an example applied to a two-plate type molding die with a pin protrusion method, and Fig. 4 shows the mold closing. A sectional view of the state, FIG. 5 shows a sectional view of the mold in the open state. Figures 6 and 7 show an example applied to a two-plate type molding die with a stripper protrusion method. Figure 6 is a cross-sectional view of the mold in the closed state, and Figure 7 is a cross-sectional view of the mold in the open state. show. Figures 8 and 9 show an embodiment applied to a 3-plate type molding die with a pin protrusion method. Figure 8 is a cross-sectional view of the mold in its closed state, and Figure 9 is a cross-sectional view of the mold in its open state. shows. Figures 10 and 11 show an example applied to a 3-plate type molding die with a stripper protrusion method.
The figure shows a sectional view of the mold in a closed state, and FIG. 11 shows a sectional view of the mold in an open state. 11... Fixed side mounting plate, 12... Double hole, X3.
・・Guide pin, 14・Counterbore hole 15・・Fixing plate, 16・・Runner stripper plate,
17... Fitting hole, 18... Fixed side template, 20...
・Screw hole, 22...Free through hole, 23...Striver guide pin, 24...Movable side template, 25...Fitting hole, 26...Free fitting hole, 27...Spacer Block, 28... Movable side mounting plate, 29... Bolt, 30...
...Protruding plate, 31...Movable plate, 34...Cavity, 35 Resin path, 36...Bolt, 37-...
・Fixed type, 38... Core, 39... Movable type, 4
0...Protrusion pin, 41...Spring, 43.
...Connecting rod, 44...Runner lock pin.

Claims (1)

[Claims] 1. A fixed-side mounting plate with a guide pin erected on one diagonal corner, and an insertion hole into which the guide pin is inserted, so that it can be stacked on the fixed-side mounting plate. a runner stripper plate and a stationary side mold plate provided in the runner stripper plate and the fixed side template, and a diagonal portion opposite to the diagonal portion where the guide pin free through hole is provided, and a guide pin free through hole is provided at a position opposite to the guide pin. A stripper guide pin is provided upright on the plate, and a stripper plate is provided so that the guide pin can be superimposed on the stationary side template by penetrating into the free through hole, and a stripper plate is provided at a position opposite to the guide pin and the stripper guide pin. a movable side mold plate that has a fitting hole into which a guide pin is fitted and is provided so as to be superimposed on the stripper plate; and a loose through hole in which each guide pin is loosely inserted into a position facing the guide pin and the stripper guide pin. A mold base comprising: a spacer block having a hole and provided so as to be superimposed on the movable mold plate; and a movable mounting plate capable of being superposed on the spacer block. 2. The movable side mounting plate has counterbored holes for bolt insertion, and the movable side template has screw holes for bolt insertion at positions corresponding to the counterbore holes. mold base. 3. Exclude the runner stripper plate and stripper plate, use the fixed side mounting plate and the fixed side mold plate as a base for forming the fixed mold, and use the movable side mounting plate, spacer block, and movable side mold plate to form the molded product. 3. The method of using the mold base according to claim 1, wherein the mold base is used as a base for forming a movable mold having a protruding pin. 4. Exclude the runner stripper plate, use the fixed side mounting plate and fixed side mold plate as a base for forming the fixed mold, and replace the movable side mounting plate, spacer block, movable side mold plate and stripper plate with the stripper plate. 3. The method of using a mold base according to claim 1, wherein the mold base is used as a base for forming a movable mold used for ejecting a molded product. 5. The stripper plate is excluded and the fixed side mounting plate, the runner stripper plate and the fixed side mold plate are used as a base for forming a fixed mold in which the runner stripper plate is used for runner branch discharge, and the movable side mounting plate,
3. The method of using a mold base according to claim 1, wherein the spacer block and the movable template are used as a base for forming a movable mold having a molded product ejection pin. 6. The fixed side mounting plate, the runner stripper plate and the fixed side mold plate are used as a base for forming the fixed mold in which the runner stripper plate is used for runner branch discharge, and the movable mold mounting plate, the spacer block, the movable side mold plate and 3. The method of using a mold base according to claim 1, wherein the stripper plate is used as a base for forming a movable mold used for ejecting a molded product.