JPH0511735B2 - - Google Patents

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.

(Prior art and its problems) In general, synthetic resin molding molds are manufactured for each molded product, and 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: one is a two-plate type that releases the molded product and the runner branch, which is a resin path, as one unit, and the other is a three-plate type that uses a pinpoint gate to cut the runner branch of the molded product when the mold is opened. There are two methods for ejecting the molded product: one using an ejector pin and the other using a stripper plate.

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

A two-plate type mold with a stripper plate protrusion method requires a guide pin on the movable mold to position the stripper plate guide and the fixed mold.

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

In addition, in a three-plate type mold with a stripper plate protrusion method, the fixed mold requires a guide pin to guide the fixed side mold plate and the runner stripper plate, and the movable mold also requires a guide pin to guide the stripper plate. A guide pin is required to position the guide and the fixed mold, and 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 became complicated.

The present invention has been made to solve the above 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 has been made to achieve the above object, and includes the following configuration.

That is, a fixed side mounting plate in which a guide pin is provided upright on each of a pair of diagonal corners of a plate-shaped body formed in a rectangular shape, and a fitting hole into which the guide pin is inserted are formed, and A runner stripper plate and a fixed side mold plate are provided so as to be superimposed on the side mounting plate, and a guide pin is provided at a pair of diagonal corners of the plate formed in a rectangular shape and at a position opposite to the guide pin. A through hole is formed, and a stripper guide pin is erected at each of the other pair of diagonal corners of the plate, and when the guide pin penetrates into the free through hole, the fixed side A stripper plate is provided so as to be superimposed on the template, and insertion holes into which each guide pin is inserted are formed at opposing positions of the guide pin and the stripper guide pin, and the stripper plate is provided so as to be superimposed on the template. Fitting holes into which each guide pin is inserted are formed at opposing positions of the movable side template and the guide pin and stripper guide pin, which are provided so that they can be aligned, and can be overlapped with the movable side template. This mold base is characterized by comprising a spacer block and a movable mounting plate that can be stacked on the spacer block.

Furthermore, excluding the runner stripper plate and/or the stripper plate of the mold base, a 2-plate type molding mold with a pin protrusion method, a 2-plate type molding mold with a stripper plate protrusion method, and a 3-plate type molding mold with a stripper plate protrusion method; It is characterized by being used as a fixed molding base and a movable molding base that constitute a plate type molding mold with a pin protrusion method or a three plate type molding mold with a stripper plate protrusion method. This is how to use the mold base.

In the mold base of the present invention, the movable side mounting plate has a counterbore hole for inserting a bolt, and the movable side template has a screw hole for inserting a bolt at a position corresponding to the counterbore hole. The side mounting plate and the movable side mold plate can be directly stacked easily.

(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 template plate (the fourth 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 5). (See Figure 7), and by removing the stripper plate, it can be used as a 3-plate mold (Figures 8 and 9).
By using all the members, it can be used as a 3-plate type mold with a stripper projection 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. Guide pins 13 are press-fitted into two two-stage holes 12 located at diagonal portions (sometimes referred to as diagonal portions). Note that the two two-stage holes located at the other diagonal portions do not necessarily have to be provided.

In addition, counterbore holes 14 are provided at two locations on the top and bottom.

The fixed side mounting plate 11 is for attaching the fixed mold to the fixed platen 15 (FIG. 4) on the molding machine side.

16 is a runner stripper plate;
A fitting hole 17 into which a guide bushing is press-fitted is provided at the same position as the two-stage hole 12 of the fixed side mounting plate 11, and is guided by the two guide pins 13 and superimposed on the fixed side mounting plate 11.

Reference numeral 18 denotes a stationary side template plate, which is also provided with an insertion hole 19 into which a guide bushing is press-fitted at the same position as the two-step hole 12 of the stationary side mounting plate 11, and is guided by the guide pin 13 to the runner stripper plate 16.
superimposed on 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.

Reference numeral 21 denotes a stripper plate, and a free through hole 22 having a larger diameter than the guide pin 13 is bored at a position facing the guide pin 13.
A two-step hole is provided in the diagonal portion opposite to the diagonal portion where the guide pin 2 is provided, and a stripper guide pin 23 having the same diameter as the guide pin 13 is press-fitted into this two-step hole and fixed. It is superimposed on the side template 18. The stripper guide pin 23 projects toward the movable mold plate.

24 is this movable side template, and the guide pin 1
3. A fitting hole 25 into which a guide bushing is press-fitted is provided at a position facing the stripper guide pin 23, and is guided by the guide pin 13 and the stripper guide pin 23 and overlapped with the stripper plate 21.

The movable side template plate 24 is connected to the movable side mounting plate 2 through two spacer blocks 27 each having a loose fitting hole 26 for the guide pin 13 and the stripper guide pin 23.
8 and are integrally connected to each other by a bolt 29 serving as a connecting means. Two protruding plates 30 are provided in the space between the two spacer blocks 27. The movable side mounting plate 28 is for attaching the movable mold to the movable platen 31 (see FIG. 4) of the molding machine.

In addition, the movable template 24 and the spacer block 2
7. It is convenient for handling that the movable side mounting plate 28 is integrated in advance with bolts 29, but it is not necessary to integrate it in advance. You may also do so.

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

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

In this case, runner stripper plate 1
6 and stripper plate 21 are not used. Therefore, the runner stripper plate 16 and stripper plate 21 are removed from the mold base 10.

A cavity 34 is carved into the fixed side template 18,
Further, a resin path 35 reaching the cavity 34 is formed in the fixed side mold plate 18 and the fixed side 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, thereby forming a stationary mold 37.

Note that it is convenient to provide the counterbore holes 14 and screw holes 20 at the stage of forming the mold base 10;
It may 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 fitting a protruding pin 40 erected on a protruding plate 30 into a protruding hole provided in a core 38, and urging the protruding plate 30 to retreat 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 pins 13 may also be press-fitted and attached to the other two two-stage holes 12 provided in the fixed side mounting plate 11, so that the guide pins 13 are 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, runner stripper plate 1
6 is not used. Therefore, the runner stripper plate 16 is removed from the mold base 10.

Similarly to the above case, the fixed mold 37 has a cavity 34 and a resin path 35, and the fixed mold plate 1
8 and the fixed side mounting plate 11 are connected by bolts 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 ejecting device connects the projecting plate 30 and the stripper plate 21 with the connecting rod 43, and releases the molded product from the movable mold by the stripper plate 21 (7th figure). 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 the two diagonal stripper guide pins 23 that are inserted into the insertion holes 25 provided in the movable mold plate 24, and the fixed mold 37 and the movable mold 39 are guided by the other two diagonal stripper guide pins
It is positioned and guided by the guide pin 13 of the book.

Note that the stripper guide pin 23 protrudes in the direction of the movable mold plate 24 and does not protrude in any way from the surface of the stripper plate 21 facing the fixed mold, so that the molded product will not get caught when falling. do not have.

[3] When applied to a 3-plate type molding die with a pin protrusion method (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 leading to the cavity 34 is formed.
are provided over the fixed side template 18, runner stripper plate 16, and fixed side mounting plate 11. Further, a runner lock pin 44 for locking the runner branch is provided upright on the fixed side mounting plate 11 and is inserted into a fitting hole provided in the runner stripper plate 16.

A core 38 is attached to the movable mold 39 side, and a molded product ejecting device similar to that of the two-plate type in [1] is provided.

Also, although not shown, there are areas 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 attachment. Board 1
Between 1 and 1, there is a puller bolt for stroke restriction,
A restriction means consisting of a restriction pin, chain, 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 fixed side template 18
The space between the runner stripper plate 16 and the runner stripper plate 16 is opened, and the runner branch remains on the runner stripper plate 16 side by being locked by the runner long pin 44. Next, the space between the runner stripper plate 16 and the fixed side mounting plate 11 is opened, and the runner branch is thereby released from the mold. The molded product is released from the mold by a molded product ejection device.

The runner stripper plate 16, fixed mold plate 18, and movable mold 39 are 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 mold with a stripper protrusion method (see Figures 10 and 11)
figure).

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

Then, in the same manner as described above, the fixed mold 37 has a cavity 34 formed in the fixed mold plate 18, and a resin path 35 is provided across the fixed mold plate 18, the runner stripper plate 16, and the fixed side mounting plate 11, A runner lock pin 44 is also attached and formed.

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.

Also, the movable side template 24, the fixed side template 18, the runner stripper plate 16, and the fixed side mounting plate 11.
The space between the two is connected by a limiting means such as a limiting bolt for limiting the stroke in the same manner as above.

As a result, the runner stripper plate 1
6. The fixed mold plate 18 and the movable mold 39 are guided and positioned by two diagonal guide pins 13. 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.

It goes without saying that in each of the above-mentioned structures [1] to [4], a cooling circuit, a slide core, and other necessary structures can be appropriately employed.

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.

(Effects of the Invention) According to the present invention, it is only necessary to prepare one type of mold base regardless of the mold structure, which reduces costs, simplifies inventory management and manufacturing management, and further standardizes the process. This will help shorten mold base delivery times.

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 and take out the released molded product, and to easily insert the insert. It can be carried out.

[Brief explanation of the drawing]

The figures show a preferred embodiment of the present invention, in which FIG. 1 is a cross section of the mold base, and a sectional view taken along line B-B in FIG. 2, and FIG. Show the diagram. Figure 3 is a sectional view showing the separated state of each member of the mold base, Figures 4 and 5.
The figures show an embodiment in which the present invention is applied to a two-plate type molding die of pin protrusion type, FIG. 4 is a cross-sectional view of the mold in a closed state, and FIG. 5 is a cross-sectional view of the mold in an 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 its closed state, and Figure 7 is a cross-sectional view of the mold in its open state. show. Figures 8 and 9 are 3
An embodiment is shown in which the present invention is applied to a plate type molding die of a pin protrusion type, and FIG. 8 shows a cross-sectional view of the mold in a closed state, and FIG. 9 shows a cross-sectional view of the mold in an open state. Figures 10 and 11 show an example applied to a 3-plate type molding die with a stripper protrusion method.
FIG. 10 is a sectional view of the mold in the closed state, and FIG. 11 is a sectional view of the mold in the open state. 11... Fixed side mounting plate, 12... Double hole, 13... Guide pin, 14... Countersunk hole, 15... Fixed plate, 16
... Runner stripper plate, 17... Fitting hole, 18... Fixed side template, 20... Screw hole, 22... Free through hole, 23... Stripper guide pin, 24... Movable side template, 25... Fitting Hole, 26... Loose 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, 40...Protruding pin, 41...Spring, 43...Connection rod,
44...Runner lock pin.

Claims (1)

[Scope of Claims] 1. A fixed side mounting plate having guide pins erected at each of a pair of diagonal corners of a plate-shaped body formed in a rectangular shape, and a fitting hole into which the guide pin is inserted. a runner stripper plate and a fixed side mold plate formed and provided so as to be superimposed on the fixed side mounting plate; and a pair of diagonal parts of the plate formed in a rectangular shape and at opposing positions of the guide pin. A free through hole for a guide pin is formed in the plate, and a stripper guide pin is provided upright at each of the other pair of diagonal corners of the plate, and the guide pin penetrates into the free through hole. Therefore, the stripper plate is provided so as to be superimposed on the fixed side template, and insertion holes into which each guide pin is inserted are formed at opposing positions of the guide pin and the stripper guide pin, and the stripper plate is provided so as to be superposed on the fixed side template. A movable template is provided so as to be superimposed on the ripper plate, and insertion holes into which each guide pin is inserted are formed at opposing positions of the guide pin and the stripper guide pin, and the movable template A mold base comprising: a spacer block that can be stacked on the spacer block; and a movable mounting plate that can be stacked on the spacer block. 2 There is a counterbored hole on the movable side mounting plate for bolt insertion.
2. The mold base according to claim 1, wherein a screw hole for inserting a bolt is provided at a position corresponding to the counterbore hole in the movable side template. 3. Excluding the runner stripper plate and stripper plate of the mold base according to claim 1 or claim 2, and using the fixed side mounting plate and the fixed side template as a base for forming the fixed mold, and movable. A method of using a mold base, characterized in that a mold mounting plate, a spacer block, and a movable side mold plate are used as a base for forming a movable mold equipped with a molded product ejection pin. 4. Excluding the runner stripper plate of the molded bay according to claim 1 or claim 2, and using the fixed side mounting plate and the fixed side mold plate as a base for forming the fixed mold, the movable side mounting plate, the spacer block, and the movable side mold plate. A method of using a mold base, characterized in that the side mold plate and the stripper plate are used as a base for forming a movable mold in which the stripper plate is used for ejecting a molded product. 5. Excluding the stripper plate of the mold base according to claim 1 or claim 2, the fixed side mounting plate, the runner stripper plate, and the fixed side template are used, and the runner stripper plate is used for discharging the runner. A method of using a mold base, characterized in that it is used as a base for forming a fixed mold, and also uses a movable mounting plate, a spacer block, and a movable side template as a base for forming a movable mold equipped with a molded product ejection pin. 6. The fixed-side mounting plate, runner stripper plate, and fixed-side template of the mold base according to claim 1 or 2 are used as a base for forming a fixed mold in which the runner stripper plate is used for runner discharge. and the use of a mold base, characterized in that the movable mold mounting plate, the spacer block, the movable mold plate and the stripper plate are used as a base for forming a movable mold in which the stripper plate is used for ejecting the molded product. Method.