JPH0747564A - Mold - Google Patents

Abstract

PURPOSE:To facilitate disassembling work, in a mold wherein electric parts are respectively provided to some mold members among many ones, by providing a connector box having a connector connected thereto from the outside in a detachable manner to the mold members having the electric parts. CONSTITUTION:In a mold having an electric part such as a valve device opening and closing a gate, connector boxes 61-63 are provided on the upper surfaces of the fixed attaching plate 6, fixed spacer block 7 and fixed receiving plate 8 being the mold members of a fixed mold 1. The lead wire 36 from the proximity switch 33 of a hydraulic cylinder 31 is connected to the connector box 61 and the lead wires 37 from the heaters 19, 22 provided to the manifold 12 or sprue bush 16 in the fixed spacer block 7 are connected to the connector block 62. Further, the connectors 40-41 fitted with cords from an external valve controller 43 are connected to the connector boxes 61-63.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die used for molding a resin, and more particularly to a molding die having an electric part such as a valve device for opening and closing a gate.

[0002]

2. Description of the Related Art FIG. 2 shows an example of a conventional valve gate type mold used for injection molding of a thermoplastic resin.
In addition, in FIG. 2, the cross section is changed by 90 ° from the center line. In the figure, 1 is a fixed die, 2 is a movable die, and these fixed die 1 and movable die 2, which are die bodies, move in the left-right direction in the figure to open and close, and when the die is closed, products are placed between them. The shaped cavity 3 is formed. Fixed type 1
Is a fixed side mounting plate 6 mounted on the fixed side platen of the injection molding machine, a first fixed side receiving plate 8 fixed to the left surface of the fixed side mounting plate 6 via a fixed side spacer block 7, and 1 Second fixed to the left side of the fixed side receiving plate 8
The fixed-side receiving plate 9 and the fixed-side template 10 fixed to the left surface of the second fixed-side receiving plate 9 are provided. This fixed side template
A plurality of cavity inserts 11 fixed to the second fixed-side receiving plate 9 are embedded in 10. Further, a manifold 12 is provided inside the fixed side spacer block 7 and between the fixed side mounting plate 6 and the first fixed side receiving plate 8. Then, the fixed-side mounting plate 6, the fixed-side spacer block 7, the manifold 12, the first fixed-side receiving plate 8, the second fixed-side receiving plate 9, and the fixed-side mold plate 10, which are the mold members stacked in this manner, The cavity insert 11 is fixed to each other by a bolt (not shown) and can be disassembled.

A sprue bush 16 fixed to the manifold 12 penetrates the fixed side mounting plate 6. A locating ring 17 is fixed to the fixed side mounting plate 6 so as to surround the sprue bush 16. Sprue bush
The inside of 16 is a sprue 18, and the band heater 19 is provided in the outer periphery. Also, the manifold 12
Inside, a runner 21 for branching the sprue 18 into a plurality of cavities 3 is formed, and a heater 22 as an electric component for heating the runner 21 and a temperature sensor are provided. Further, a gate 23 for the cavity 3 is formed in each cavity insert 11, and a gate bush 24 is embedded so as to face the gate 23.

The fixed mold 1 is provided with a valve device 26 for opening and closing each gate 23. Next,
The configuration of the valve device 26 will be described. The manifold
A plurality of valve casings 27 are fixed by being sandwiched between 12 and the first fixed side receiving plate 8. These valve casings 27 penetrate the fixed side receiving plates 8 and 9 and have their tips fitted into the respective gate bushes 24, and the inside thereof communicates the final branch passage of the runner 21 with the gate 23. is there. Further, the valve casing 27 has a built-in band heater 28 as an electric component and a temperature sensor. Further, in each valve casing 27, a valve pin 30 that moves left and right and fits into the gate 23 is provided.
The valve pin 30 penetrates the manifold 12 and is connected to a piston rod 32 of a hydraulic cylinder 31 provided on the fixed side mounting plate 6. Further, each hydraulic cylinder 31 is provided with a proximity switch 33 as an electric component for detecting the operation of the piston rod 32.

The proximity switch 33 of the hydraulic cylinder 31, the heaters 22 and 19 and the temperature sensor of the manifold 12 and the sprue bush 16, and the band heater 28 and the temperature sensor of the valve casing 27 are electrically connected to each other. Lead wires 36, 37, 38 are led out above the fixed mold 1 and connected to a connector box 39 provided on the upper side of the fixed mold 1. A valve controller 43 is electrically connected to the connector box 39 via detachable corded connectors 40, 41, 42.

On the other hand, although not shown, the movable mold 2 has a movable side receiving plate 46 fixed to the right side of a movable side mounting plate attached to a movable side platen of an injection molding machine via a movable side spacer block. The movable-side template 47 is fixed to the right side of the movable-side receiving plate 46. This movable side mold plate 47 has a plurality of core inserts fixed to the movable side receiving plate 46.
48 is embedded. These core inserts 48 form one cavity 3 with each cavity insert 11 of the fixed mold 1.

Further, the fixed side mounting plate 6 of the fixed mold 1,
Fixed-side receiving plates 8 and 9, fixed-side mold plate 10 and cavity insert 11, movable-side mounting plate of the movable mold 2, movable-side receiving plate 4
6. Water passages 51, 52, 53, 54, 55, 56 forming a circuit for cooling are formed in the movable side mold plate 47 and the core insert 48, respectively.

Next, the operation of the above configuration will be described. At the time of molding, first, the fixed mold 1 and the movable mold 2 are closed. Then, the valve pin 30 is retracted by driving the hydraulic cylinder 31, the gate 23 is opened, and then the molten resin is injected from the nozzle of the injection molding machine connected to the sprue bush. This resin is sprue 18, manifold 12
Through the runner 21 and the valve casing 27, and flows from the gate 23 into the cavity 3. After the cavity 3 is filled with the resin, the hydraulic cylinder 31 is driven to move the valve pin 30 forward to fit the gate 23, and the gate 23 is closed. Further, after the resin in the cavity 3 is sufficiently cooled and solidified, the fixed mold 1 and the movable mold 2 are opened, and the resin in the cavity 3, that is, the product is taken out. While the above steps are repeated, the heaters 19, 22,
By heating 28, the resin in the sprue 18, the runner 21, and the valve casing 27 is kept in a molten state.

Further, the valve controller 43 controls the heaters 19, 22, 28 and controls the operation of the valve pin 30 in conjunction with the injection molding machine. That is, the valve controller 43 sends information about the temperature inside the valve casing 27 and the information about the opening and closing of the valve pin 30 by the signal from the proximity switch 33 to the injection molding machine. Based on this, the injection molding machine controls the timing of driving the hydraulic cylinder 31 and injecting the resin from the nozzle.

[0010]

By the way, for example, when the constant hardening layer of the resin formed in the fixed mold 1 is to be removed, it is necessary to disassemble the fixed mold 1 itself. However, in the conventional mold, the fixed side mounting plate 6, the manifold 12 or the fixed side receiving plates 8 and 9 to be disassembled, the proximity switch 33, and the lead wires 36 from the heaters 19, 22, and 28, respectively. 37, 38 in one connector box 39
Since the lead wires 36, 37, and 38 were in the way, disassembling the fixed mold 1 was troublesome. That is, the lead wires 36, 37, 38 themselves may have to be removed from the connector box 39, which is troublesome.

Therefore, it is conceivable to connect the lead wires from the proximity switch and the heater to one connector box via separate connectors in a detachable manner. According to this structure, by removing the connector from the proximity switch or heater to the connector box,
It does not hinder the disassembly of the fixed type, but the number of connectors increases and the work of attaching and detaching the connectors is troublesome.

The present invention is intended to solve such a problem, and in a molding die having electric parts in some of a plurality of mold body members constituting one mold body such as a fixed mold, The purpose is to facilitate the decomposition of the mold.

[0013]

In order to achieve the above-mentioned object, the present invention comprises a plurality of mold bodies that can be opened and closed and that form a cavity between them when the molds are closed. In a molding die in which body members are stacked and fixed in a disassembleable manner, and some of these plurality of mold body members respectively have electric parts, in each of the mold body members having electric parts, It is provided with a connector box which is electrically connected to a certain electric component and which is detachably connected to a connector from the outside.

[0014]

In the molding die of the present invention, a plurality of mold bodies are closed at the time of molding, and a cavity formed between these mold bodies is filled with resin. Further, there are electric parts in the plurality of mold body members constituting the mold body, each of the mold body member with the electric component has a connector box electrically connected to the electric parts in this mold body member, External connectors are connected to these connector boxes. Therefore, when the mold is disassembled, each connector box is separated together with each mold member.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the molding die of the present invention will be described below with reference to FIG. Since the molding die of this embodiment has the same structure as the valve gate type die shown in FIG. 2 described above, the corresponding parts are designated by the same reference numerals and the description thereof will be omitted. Is omitted. In the mold of this embodiment, a connector box is provided on the upper surface of each of the fixed-side mounting plate 6, the fixed-side spacer block 7, and the fixed-side receiving plate 8 that are mold members constituting the fixed mold 1 that is one mold. 61, 62, 63 are provided. Then, the fixed side mounting plate 6
In the connector box 61 provided on the same side, the proximity switch 33 of the hydraulic cylinder 31 provided on the same fixed side mounting plate 6 is provided.
36 is electrically connected. Further, in the connector box 62 provided in the fixed side spacer block 7, the heater 19 provided in the manifold 12 and the sprue bush 16 in the fixed side spacer block 7,
A lead wire 37 from 22 or the like is electrically connected. Furthermore, the connector box provided on the fixed side receiving plate 8
A lead wire 38 from the heater 28 in the valve casing 27 provided on the fixed side receiving plates 8 and 9 is electrically connected to the 63. In addition, each connector box 61, 62,
The corded connectors 40, 41, 42 from the external valve controller 43 are detachably connected to 63.

In this way, the fixed side mounting plate 6, the fixed side spacer block 7 and the fixed side receiving plate 8 are provided with connector boxes 61, 62 and 63, respectively, and molds corresponding to these connector boxes 61, 62 and 63 are provided. Heater on the part
Lead wires 36, 37, 38 from 19, 22, 28 and proximity switch 33
Since they are connected to each other, the work becomes easy when the fixed mold 1 is disassembled. That is, when the fixed side mounting plate 6, the fixed side spacer block 7 or the fixed side receiving plates 8 and 9 are separated from each other, the respective connector boxes 61, 62 and 63
The lead wires 36, 37 and 38 do not interfere with the separation. Therefore, when the fixed mold 1 is disassembled, the lead wires 36, 37, 38 themselves are connected to the connector box 61,
There is no need to remove it from 62 and 63.

By the way, the water passages 51, ..., 56 in the fixed mold 1 and the movable mold 2 must have entrances and exits on the outer surfaces of the fixed mold 1 and the movable mold 2, respectively. On the other hand, as described above, in the fixed mold 1, the fixed side mounting plate 6, the fixed side spacer block 7, and the fixed side receiving plate 8 are provided.
Since the connector boxes 61, 62, 63 are provided on the respective upper surfaces of the above, it is difficult to provide the entrances and exits of the water passages 51, ..., 54 on the upper surfaces. However, for example, the inlets of the water passages 51, ..., 54 are provided on the lower surface of the fixed die 1, and the water passages 51, ..., 54 are provided on the front surface or the rear surface of the fixed die 1, that is, the operation side or the non-operation side surface.
The exit of should be provided.

The present invention is not limited to the above embodiment, but various modifications can be made. For example,
In the above embodiment, the valve gate type mold is taken as an example,
The present invention is not limited to this, and can be applied to various molds in which electric components are provided on a plurality of mold body members that constitute one mold body. Also, the connector box is not limited to three divisions, and may be allocated to appropriate mold body members according to the electric parts provided in each mold body member.

[0019]

According to the present invention, a mold body that forms a cavity together with other mold bodies is formed by stacking a plurality of mold body members so as to be disassembled and fixed to some of the plurality of mold body members. In a molding die having an electric component, each mold member having an electric component is provided with a connector box electrically connected to the electric component of the mold member and detachably connected with a connector from the outside. Therefore, when disassembling the mold itself, the lead wires from the electric parts to the connector box do not get in the way, and it is not necessary to remove these lead wires themselves, and the disassembling work can be facilitated.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a molding die of the present invention.

FIG. 2 is a cross-sectional view showing an example of a conventional molding die.

[Explanation of symbols]

 1 Fixed mold (mold body) 2 Movable mold (mold body) 3 Cavity 6 Fixed side mounting plate (mold body member) 7 Fixed side spacer block (mold body member) 8 1st fixed side receiving plate (mold body member) 9th 2 Fixed side receiving plate (mold body member) 10 Fixed side mold plate (mold body member) 22 Heater (electric component) 28 Band heater (electric component) 33 Proximity switch (electric component) 40 Connector 41 Connector 42 Connector 61 Connector box 62 Connector box 63 connector box

Claims (1)

[Claims] 1. A plurality of mold bodies which can be opened and closed to form a cavity between the mold bodies when the molds are closed. The mold body comprises a plurality of mold body members which are superposed and fixed so as to be disassembled. In a molding die having electric components in some of the mold members, each mold member having an electric component is electrically connected to the electric component in the mold member and a connector from the outside can be attached and detached. A molding die, which is provided with a connector box connected to.