JPH0441218A - Molding die - Google Patents

Abstract

PURPOSE:To cool a molded form near the mating surfaces of each mold divided body in a short time, and to shorten a molding cycle by penetrating refrigerant flow paths communicating as one passage into each mold divided body respectively and setting the projecting length of a flow-path connecting pipe at a value longer than the moving distance of both mold divided bodies at the time of mold opening. CONSTITUTION:Refrigerant flow paths 3, 7 communicating as one passage through the mutual mating surfaces 2, 6 of each mold 1, 5 are penetrated through a fixed side mold 1 and a movable side mold 5, and a molten material in the vicinity of the mating surfaces 2, 6 is cooled in a short time. Since projecting length from the mating surface 2 of a flow-path connecting pipe 4 is set at a value longer than the moving distance of both molds 1, 5 at the time of mold opening, the inserting section 44 of the flow-path connecting pipe 4 is left as it is inserted into a pipe receiving section 8, and the refrigerant flow paths 3, 7 are brought to the state, in which they are connected mutually even at the time of mold opening. Accordingly, a refrigerant can be flowed into the refrigerant flow paths 3, 7 even at the time of mold opening, and a molded form P in a molding die at the time of mold opening can further be cooled.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a mold having a cooling medium flow path, and is particularly suitable for use in a mold for injection molding.

(Prior Art) In a mold for injection molding, as shown in FIG. 5, a stationary mold a and a movable mold C are clamped through their mating surfaces, d. After the molten material is filled between the clamped molds a and c, a cooling medium such as water or oil is flowed into the cooling medium passage e in the movable mold C. Then, the molten material is cooled and becomes a molded article P. At this time, the fixed mold a and the movable mold C are clamped together with a force that can withstand the injection pressure of the molten material, so it is necessary to ensure the strength of both molds. Therefore, the coolant flow path e in the movable mold C was provided at a distance from the mating surface d of the movable mold C.

(Problem to be Solved by the Invention) However, as described above, if the cooling medium flow path e is located away from the mating surface d, it is difficult to sufficiently cool the molten material near the mating surface d in a short time. could not. Therefore, with conventional molding molds, it takes time to cool the molten material within the mold, making it difficult to shorten the molding cycle.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a molding die that can easily shorten the molding cycle by efficiently cooling the molten material even near the mating surfaces.

(Means for Solving the Problems) In the molding die according to the present invention, each mold segment has a cooling medium flow path that connects into one through the mating surfaces of the mold segments when the mold is clamped. A flow path connecting vibrator is provided in the connecting hole of the coolant flow path in the mating surface of one mold dividing body, protruding from the mating surface, At the connection port of the coolant flow path on the mating surface of the mold division body, a pipe holder for receiving the flow path connecting vibrator is provided with a part recessed from the mating surface, and the protruding length of the flow path connecting vibrator is set according to the mold. This is set to be longer than the moving distance of both mold division bodies when opening.

(Function) In the molding die according to the present invention, each mold segment is provided with a continuous cooling medium flow path through the mating surfaces of the mold segments when the mold is clamped. , the molded product near the mating surfaces of each mold segment can be cooled in a short time.

In addition, the flow path connecting vibrator of one mold dividing body is inserted into the pipe holder of the other mold dividing body that abuts against this mold dividing body, and the protruding length of the flow path connecting vibrator is The distance is set to be longer than the moving distance of both mold segments when opening.

Therefore, regardless of when the mold is opened or when the mold is closed, the cooling medium flow paths of each mold segment are always connected to each other.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a partial sectional view showing the molding die according to the present invention in a closed state, and FIG. 2 is a partial sectional view showing the mold in an opened state.

The molding die is composed of a stationary die 1 and a movable die 5. For both molds 1.5, each mold 1.5 is
A continuous coolant flow path 3.7 is provided through the mating surfaces 2.6.

A flow path connecting vibe 4 is attached to the connection port of the coolant flow path 3 on the mating surface 2 of the stationary mold 1 .

The flow path connecting vibe 4 (see FIGS. 3 and 4) is for connecting the coolant flow paths 3.7.

One end side of the flow path connecting vibrator 4 is formed as a mounting portion 42 for being attached to the vibe mounting portion 11 of the stationary mold 1 . A male screw portion 43 is provided on the outer surface of the attachment portion 42 and is screwed into the female screw portion 12 formed on the inner wall of the pipe attachment portion 11 of the stationary mold 1 . The other end of the flow path connecting vibe 4 is an insertion portion 44 that is inserted into the movable mold 5 .

Between the mounting portion 42 and the insertion portion 44, the male screw portion 43 is provided.
A hexagonal nut portion 41 that engages with a jig for attaching the flow path connecting vibe 4 to the stationary mold 1 is provided near the hexagonal nut portion 41 .

The flow path connecting vibrator 4 configured as described above has its male threaded portion 43
It is attached to the fixed mold 1 by screwing it into the female threaded part 12 of the pipe attachment part 11 of the fixed mold 1. In this way, the protruding length of the insertion part 44 from the mating surface 2 when installed in the vibrator attachment part 11 of the fixed mold 1 is the moving distance of the movable mold 5 when the mold is opened, that is, , is set longer than the interval between both molds 1.5 when the molds are opened.

At the connection port of the coolant flow path 7 on the mating surface 6 of the movable mold 5, a pipe holder 8 for receiving the insertion section 44 of the flow path connecting vibe 4 is provided with a part 8 recessed from the mating surface 6. . The depth of the pipe receiver portion 8 is set to be approximately equal to or longer than the length of the insertion portion 44 of the flow path connecting vibe 4. The inner diameter of the pipe receiver section 8 is set to be approximately equal to or larger than the outer diameter of the insertion section 44. An annular groove 82 is provided around the inner wall 81 of the pipe receiver portion 8 near the mating surface 6 . In this annular groove 82, an insertion portion 44 of the flow path connecting vibe 4 inserted into the pipe receiving portion 8 is provided.
An annular banking 83 is fitted into the ring to make sliding contact with the outer surface of the ring. This prevents the cooling medium from leaking to the outside from the gap between the insertion portion 44 of the flow path connection pipe 4 and the pipe receiving portion 8. Therefore, the annular backing 83 is made of an elastic material such as rubber.

Next, the operation of the molding die configured as described above will be explained.

First, a molten material is filled between the stationary mold 1 and the movable mold 5 which are clamped together.

When the filling of the molten material is completed, the cooling medium flow path 3.7
The fixed mold 1 and the movable mold 5 are cooled by flowing a cooling medium inside the mold. At this time, each mold 1.5 is provided with a continuous coolant flow path 3.7 through the mating surface 2.6 of each mold 1.5, so that the mating surface The molten material around 2.6 will also be cooled in a short time.

Furthermore, since the protruding length of the flow path connection pipe 4 from the mating surface 2 is set longer than the moving distance of both molds 1.5 when the molds are opened, the insertion portion 44 of the flow path connection pipe 4 is It remains inserted into the receiving part 8, and the cooling medium flow paths 3.7 are connected to each other even when the mold is opened. Therefore, even when the mold is opened, the cooling medium flow path 3.
It becomes possible to flow a cooling medium into the mold 7, and it becomes possible to further cool the molded product P in the molding die when the mold is opened.

(Effects of the Invention) As described above, according to the present invention, sufficient cooling is performed near the mating surfaces of each mold segment of the molding die, so the cooling time for the molten material is shortened, and the molding cycle It becomes possible to shorten the time.

Further, even when the mold is opened, the cooling medium channels are connected to each other, so that the molded product in the molding die can be further cooled.

[Brief explanation of the drawing]

1 and 2 show an embodiment of a molding die according to the present invention, FIG. 1 is a partial sectional view showing the molding die in a clamped state, and FIG. 2 is a partial cross-sectional view showing the molding die in a clamped state. FIG. 3 is a side view showing a flow path connection pipe, FIG. 4 is a front view thereof, and FIG. 5 is a partial sectional view showing a conventional molding die. 1... Fixed side mold (one mold split body) 2... Mold dividing surface 3... Coolant flow path 4... Channel connecting pipe 5... Movable side mold (other side) Mold dividing body) 6...Mold dividing surface 7...Cooling medium channel 8...Pipe holder is part P...Molded product Figure 2 Patent applicant Hiroshi Sekisui Chemical Co., Ltd. Representative 1) Kaoru Figure 4! 3L Figure 5

Claims (1)

[Claims] 1) A continuous cooling medium flow path is provided through each mold division body through the mating surfaces of each mold division body during mold clamping, and the cooling medium flow at the mating surfaces of one mold division body is provided. At the connection port of the flow path, a flow path connection pipe is provided to protrude from the mating surface, while at the connection port of the coolant flow path at the mating surface of the other mold division body that abuts this mold division body. The pipe receiving portion for receiving the flow path connecting pipe is provided so as to be recessed from the mating surface, and the protruding length of the flow path connecting pipe is set to be longer than the moving distance of the two mold division bodies when the mold is opened. A mold that is characterized by: