JPH0726018Y2 - Compression mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Purpose of the Invention [Industrial field of application] The present invention relates to a compression mold, and particularly to a rod-shaped member and a lower mold attached to an upper mold or an upper mold holding member. The present invention relates to a compression molding die in which a die gap securing member for securing a gap between an upper die and a lower die is formed by a gripping member attached to the lower die holding member to grip the rod-shaped member. Is.

[Prior Art] Conventionally, as a compression molding die of this type, like a compression molding die 10 shown in FIG. 5, a rod-shaped member 15 is fixed to an upper die 12 or an upper die holding member 11 and a lower die is used. 14 or a cylindrical member 17 for guiding the rod member 15 to the lower die holding member 13.
Is provided and a return spring 18 is also provided between the upper die 12 and the lower die 14 or between the upper die holding member 11 and the lower die holding member 13 so that the upper die 12 and the lower die 14 are Has been proposed in which the upper mold 12 and the lower mold 14 are brought closer to each other by a mold clamping member (not shown) to facilitate the supply of the material M to be molded or the removal of the molded product. .

[Problems to be Solved] However, in the conventional compression molding die 10 , (i) the upper die 12 and the lower die 14 are held in the die open state mainly by the return spring 18, so that they are inserted into the lower die 14. The load of the upper mold 12 is carelessly applied to the formed molding material M,
There is a drawback that the material M to be molded causes a defect such as partial hardening, and (ii) the upper mold 12 is opposed to the lower mold 14 by a mold clamping member (not shown) while resisting the spring force of the return spring 18. Since it was put in the mold clamped state by making it close,
On the other hand, the upper mold 12 cannot be kept in stable contact with the upper mold 12, and the upper mold 12 is inadvertently separated from the lower mold 14, which causes a defect such as deformation or discoloration of the molded product. there were.

Therefore, in order to eliminate these drawbacks, the present invention provides a gripping member for arranging the rod-shaped member on the upper die or the upper die holding member and for holding the rod-shaped member on the lower die or the lower die holding member. By providing the compression mold, the upper mold and the lower mold are stably held in the mold open state and the mold clamped state, respectively.

(2) Configuration of the Invention [Means for Solving the Problems] The means for solving the problems provided by the present invention is, “Upper die holding member and lower die holding member for holding the upper die and the lower die or the upper die and the lower die, respectively. In a compression molding die in which a gap between the upper die and the lower die is secured by arranging the die gap securing member with respect to the member, the die gap securing member includes (a) a base end portion of the upper die (12). ) Or upper die holding member (11)
It is fixed to the locking groove (15
(A) a rod-shaped member (15), and (b) a base end portion of a lower mold (14) or a lower mold holding member (13).
The gripping member (16) is fixed to the gripping member (16) and has a tip portion divided into a plurality of gripping pieces (16B) by a slit (16A), and the bar-shaped member (15) is gripped by the plurality of gripping pieces (16B). ) And are provided, the upper mold (12) and the lower mold (14) are stably held in the mold open state and the mold clamped state. ”

[Operation] In the compression molding die according to the present invention, the mold gap ensuring member is provided for the upper die holding member and the lower die holding member for holding the upper die and the lower die or the upper die and the lower die, respectively. In a compression molding die that secures a gap between a die and a lower die, a die gap securing member has (a) a base end portion fixed to an upper die or an upper die holding member, and a tip end peripheral surface. A bar-shaped member having a locking groove formed therein, and (b) a base end portion of which is fixed to a lower die or a lower die holding member, and a front end portion of which is divided by a slit into a plurality of gripping pieces. A gripping member formed by gripping a rod-shaped member with a plurality of gripping pieces is provided, and the upper mold and the lower mold are stably held in the mold open state and the mold clamped state. Stable the upper and lower molds in the mold open state and mold clamped state It has a holding effect, and eventually (ii) an effect of avoiding application of unnecessary force to the material to be molded in the mold open state, and (iii) stably maintaining the upper mold and the lower mold in the mold clamped state, It acts to prevent the upper and lower dies from being inadvertently separated from each other and causing problems such as deformation or discoloration of the molded product.

[Examples] Next, the compression mold according to the present invention will be specifically described with reference to its preferred examples. However, the embodiments described below are provided for facilitating or facilitating the understanding of the present invention, and not for limiting the present invention. In other words, each member disclosed in the embodiments described below includes all design changes and equivalent replacements within the spirit and technical scope of the present invention.

FIG. 1 is a sectional view showing an embodiment of a compression molding die according to the present invention, showing a case where the upper die 12 and the lower die 14 are in a separated state in which they are largely separated from each other.

FIG. 2 is a sectional view showing an operating state of the embodiment shown in FIG. 1 and shows a case where the upper mold 12 and the lower mold 14 are in a mold open state in which they are separated from each other by a predetermined distance.

FIG. 3 is a sectional view showing another operation state of the embodiment shown in FIG. 1, in which the upper mold 12 and the lower mold 14 are brought close to each other for molding the material M to be molded, and the mold is clamped. It shows the case of being in a state.

FIG. 4 is a cross-sectional view showing the operation state of the embodiment of FIG. 1, showing the case where the upper mold 12 and the lower mold 14 have returned to the mold open state for taking out the molded product P.

First, referring to FIGS. 1 to 4, the structure of an embodiment of a compression mold according to the present invention will be described in detail. Reference numeral 10 denotes a compression molding die according to the present invention, which includes an upper die 12 and a lower die holding member which are appropriately arranged with respect to an upper die holding member 11.
A lower mold 14 and an upper mold holding member 11 that are appropriately arranged with respect to
With respect to the rod-shaped member 15 whose base end portion is fixed to the peripheral surface of the front end portion and the locking groove 15A is formed, and the base end portion is fixed to the lower die holding member 13 and from the front end portion to the base end portion. The slit 16A is formed toward the end to form a plurality of gripping pieces 16B, which are formed on the inner peripheral surface of the gripping piece 16B when the tip of the rod member 15 is inserted into the gripping piece 16B. And a cylindrical gripping member (so-called “collet member”) 16 for gripping the rod-shaped member 15 by the gripping projection 16C.

The peripheral surface of the tip end portion of the rod-shaped member 15 is preferably a tapered surface in order to facilitate insertion into the opening of the tip end portion of the grip member 16.

The rod-shaped member 15 and the gripping member 16 function as a mold gap securing member for securing a gap between the upper mold 12 and the lower mold 14. Incidentally, the rod-shaped member 15 and the gripping member 16 may be arranged directly on the upper mold 12 and the lower mold 14, respectively, but for convenience of description, this case will not be described further.

Further, the operation of one embodiment of the compression mold according to the present invention will be described in detail with reference to FIGS. 1 to 4.

Compression mold 10 according to the present invention (the supply of the molding material), first, as shown by arrow A _I, and inserting the distal end portion of the rod 15 to the end opening of the gripping member 16, in the locking groove 15A On the other hand, by inserting the grip projection 16C formed on the inner circumference of the tip of the grip piece 16B,
The upper mold 12 and the lower mold 14 are stably held in the mold open state (first
(See Figures and 2).

In the compression mold 10 according to the present invention, the material M to be molded is supplied to the lower mold 14 in the mold open state in which the upper mold 12 and the lower mold 14 are separated from each other (see FIG. 2). At this time, in the compression molding die 10 according to the present invention, the grip projection 16C of the grip member 16 is engaged with the locking groove 15A of the rod-shaped member 15, and the upper mold 12 and the lower mold 14 are stably opened. Since it is maintained, it is possible to avoid the occurrence of defects such as partial curing due to careless application of unnecessary force to the material M to be molded.

(Clamping) After that, when the upper mold holding member 11 is pressed toward the lower mold holding member 13 by an appropriate mold clamping member (not shown), the gripping protrusion of the gripping member 16 from the locking groove 15A of the rod-shaped member 15 Part 16C comes off,
The tip end portion of the rod-shaped member 15 moves in the direction of the arrow A ₂ while pressing and expanding the grip projection 16C of the grip member 16 outward.

When the upper mold 12 and the lower mold 14 are brought into contact with each other in the mold clamping state, the gripping member 16 holds the rod-shaped member 15 in the gripping projection 1 of the gripping piece 16B.
6C holds the material sufficiently firmly (that is, with a force sufficient to resist the gas pressure or the like generated during molding of the material M to be molded inside the upper mold 12 and the lower mold 14).

Therefore, in the compression molding die 10 according to the present invention, it is possible to prevent the upper die 12 from being inadvertently separated from the lower die 14 in the mold clamping state, which causes a defect such as deformation or discoloration of the molded product P. This can be avoided (see FIG. 3).

(Mold Opening) After the molding target material M is molded into the molded product P, the upper mold 12 is moved to the arrow A ₃ while resisting the gripping force of the rod-shaped member 15 by the gripping member 16 by the mold clamping member (not shown). Lower mold 14 as shown in
And the mold is opened (that is, the grip projection 16C of the grip member 16 is engaged with the locking groove 15A of the rod member 15) (see FIG. 4).

(Removal of Molded Product) When the molded product P is taken out from the lower mold 14 in the mold open state, the compression mold 10 according to the present invention returns to the initial condition, and a new material M to be molded is supplied.

Although the case where the upper die and the lower die are brought into contact with and separated from each other has been described above, the present invention is not limited to the case where the upper die and the lower die are only formed. In other words, the above-mentioned upper mold and lower mold mean two mold members that are brought into contact with and separated from each other. For example, when including an intermediate mold, the above-mentioned upper mold means an upper mold or an intermediate mold, and the above-mentioned lower mold means an intermediate mold or a lower mold.

(3) Effects of the Invention As is clear from the above, the compression mold according to the present invention is a mold for the upper mold holding member and the lower mold holding member for holding the upper mold and the lower mold or the upper mold and the lower mold, respectively. In a compression molding die in which a gap between the upper mold and the lower mold is secured by disposing a gap securing member, the mold gap securing member includes (a) a base end portion with respect to the upper mold or the upper mold holding member. And a rod-shaped member having a locking groove formed on the peripheral surface of the tip portion, and (b) the base end portion is fixed to the lower die or the lower die holding member member, and the tip portion. Is divided into a plurality of gripping pieces by slits, and a gripping member that grips a rod-shaped member with a plurality of gripping pieces is provided, and the upper mold and the lower mold are stably held in the mold open state and the mold clamping state. (I) the upper mold And the lower mold can be stably maintained in the mold open state and the mold clamped state, and (ii) the effect of avoiding application of unnecessary force to the molding material in the mold open state, and (iii) The upper mold and the lower mold can be stably maintained in the mold clamped state, and it is possible to prevent the upper mold and the lower mold from being inadvertently separated from each other and causing problems such as deformation or discoloration of the molded product.

[Brief description of drawings]

FIG. 1 is a sectional view showing a compression mold according to the present invention, and FIG.
FIG. 4 to FIG. 4 are sectional views showing the operating state of the embodiment of FIG. 1, and FIG. 5 is a sectional view showing a conventional example. 10 ...... Compression mold 11 …… Upper die holding member 12 …… Upper die 13 …… Lower die holding member 14 …… Lower die 15 …… Bar-shaped member 15A …… Locking groove 16 …… Grip member 16A …… Slit 16B …… Grip piece 16C …… Grip protrusion M …… Molding material P …… Molded product

Claims (1)

[Scope of utility model registration request] 1. A mold gap securing member is provided for an upper die and a lower die or an upper die holding member and a lower die holding member for holding the upper die and the lower die, respectively. In a compression molding die in which a gap is secured, the die gap securing member includes (a) a base end portion of an upper die (12) or an upper die holding member (11).
It is fixed to the locking groove (15
(A) a rod-shaped member (15), and (b) a base end portion of a lower mold (14) or a lower mold holding member (13).
The gripping member (16) is fixed to the gripping member (16) and has a tip portion divided into a plurality of gripping pieces (16B) by a slit (16A), and the bar-shaped member (15) is gripped by the plurality of gripping pieces (16B). ) And are provided, and the upper mold (12) and the lower mold (14) are stably held in the mold open state and the mold clamped state.