JPH0486237A - Temperature-regulating mechanism for mold - Google Patents

Abstract

PURPOSE:To contrive to reduce the labor used for fitting and releasing the feeding hose of temperature-regulating liquid by a method in which a mold temperature- regulating hose is fixedly connected to a stationary platen and a movable platen and is also automatically connected to the matrix of the mold. CONSTITUTION:The halves 4a, 4b of a mold 4 are arranged on each of a stationary platen 1 and a movable platen 3, and when the fitting thereof by a clamp is finished, the path 10 of temperature-regulating liquid in the mold 4 is connected to the feeding device 8 of temperature-regulating liquid through an automatically connecting structure 11 and the path 9 of the temperature-regulating liquid in each platen. While the operation-command for solenoid values 15 (a, b) is released by the signal of the finish of said fitting from a sensor 23, the solenoid valves 15 (a, b) are switched to feeding side by NC device. Consequently, the temperature-regulating liquid is fed to the stationary platen 1 and the movable platen 3 from the feeding device 8 of temperature- regulating liquid through feeding hoses 12, 13., and then circulates through the matrix 6 of the mold 4, whereby a core 7 is kept at set temperature. When the mold 4 is replaced, by the solenoid valves 15 (a, b) the temperature-regulating liquid is prevented from being spouted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a temperature adjustment mechanism for maintaining a mold or core at a set temperature in an injection molding machine.

The mold temperature control mechanism of a conventional injection molding machine is important for maintaining the temperature of the mold at a temperature that is compatible with the characteristics of the resin to be molded, and for obtaining uniform molded products.

However, in the conventional mold temperature control mechanism, the liquid supply hose from the temperature control liquid supply device is connected to the mold, which requires repeated attachment and detachment every time the mold is replaced.

Furthermore, since the hose cannot be placed in a fixed position, the hose for supplying the temperature control liquid may become an obstacle during work.

Problems to be Solved by the Invention The present invention provides a mold temperature control mechanism that does not require the removal and attachment of the liquid supply hose when replacing the mold or the core, and allows the ports to be placed in approximately the same position. The challenge is to provide

A further means for solving the problem is to form temperature regulating liquid passages in the fixed platen and movable platen of the mold clamping part.

A liquid supply path from a temperature control liquid supply device is connected to one end of the temperature control liquid passage. Moreover, the temperature control liquid passage of the mold is connected to the other end.

The temperature control liquid passages between the platen and the mold are connected to each other by an automatic connection structure.

In addition, the above-mentioned mold may be a core without a matrix (+J).

Furthermore, a temperature regulating liquid passage may also be formed in the core.

The working temperature control liquid device circulates the temperature control liquid from the temperature control liquid passages of the fixed platen and movable platen to the temperature control liquid passage of the mold or core through an automatic connection structure, and maintains the mold or core at the set temperature. to be maintained.

Embodiment 1 - Figure 1 shows the main parts of the mold clamping part installed in an injection molding machine.A fixed platen 1 and a rear platen (not shown) are connected by a tie bar, and a movable platen 3 is connected to a tie bar 2. is slidably mounted.

The operation of this mold clamping section is the same as in a normal injection molding machine.

A fixed half 4a of a mold 4 is attached to the fixed platen 1, and a movable half 41 of the mold 4 is attached to the movable platen 3.

Reference numeral 5 indicates a clamp.

The two halves 4a, 4b are respectively composed of master molds 6a, 6b, an identification side half 7a and a movable side half 7b of the core 7.

In this mold clamping section, the mold temperature control mechanism is composed of a temperature control liquid supply device 8, a temperature control liquid passage 9, 10, and an automatic connection structure 11 between both temperature control liquid passages 9, 10.

The temperature control liquid passage 9 is formed in the fixed platen 1 and the movable platen 3 (9a, 9b...Hereinafter, the fixed platen side will be referred to as 81).
The movable platen side is referred to as b, and if not specified, both are meant), and the temperature control passage 10 is the mother mold 6 of the mold 4.
(10 a, ]-0b) formed in (a, b)
. Therefore, the automatic connection structure 11 described above is constructed between the temperature regulating liquid passages 9 of both platens 1 and 3 and the temperature regulating liquid passages 1o of the respective mother molds 6.

The core 7 includes a molding cavity on the abutting surface (parting surface).

The temperature control liquid supply device 8 adjusts the temperature control liquid, which is water or oil, to a predetermined temperature (50 to 150°C) and supplies the temperature control liquid to the temperature control liquid passage 9,
The injection molding machine 1 is supplied to the injection molding machine 1 using a known device for supplying and circulating the
It is activated at the same time as the start of.

This device 8 includes a supply hose 12.13 as a liquid supply path.
(Fixed platen 1 on feed side p and return side r respectively)
It is fixedly connected to the temperature control liquid passage 9 (a, b) of the movable platen 3 via a coupler 14, and is connected to the feed side 1.2p, i.
Connected to the path 3p are solenoid valves 15, (a, b) that are controlled by an NC device included in the injection molding machine.

The electromagnetic valve 15 is a two-way switching valve, and switches between the supply side p and the return side r to the platen (1, 3) according to a command from the NC device.

Temperature control liquid passages 9 (a, b) and 10 (a, b) are the second
As shown in the figure, connect the end of the straight hole 16 provided in the matrix 6 to the hose 1.
7 to form a circuit by interconnecting them outside the matrix 6,
Both ends of the circuit are closed with screws 18 or the like, and inlet and outlet holes 19 are formed that reach near both ends of the circuit from the side to be attached to the platen.

When the mold 4 is attached to the platens 1 and 3, the automatic connection structure 11 connects the insides of the opposing ends of the temperature control liquid passages 9 and 10 on the platen and mother mold sides as shown in FIG. ,on the other hand(
In the embodiment, the temperature control liquid passage 9) on the platen side is formed in a port 19 with a large diameter or annularly circulating, and an O-ring 20 is attached around the periphery of the port 19. It has a structure in which the ends of the temperature regulating liquid passage (temperature regulating liquid passage 10 on the mother mold 6 side) are pressed together from the front.

The automatic connection structure 11 may further include a protrusion 21 that fits into the port 19 from the mother die 6, as shown in FIG. 3(B). An O-ring 22 is attached to the outer periphery of the protrusion 21.

In these cases, the amount of protrusion of the O-ring 20 before the mother mold 6 is pressed or the amount of protrusion of the protrusion 24 (
'', which is smaller than the clearance between these platens 1 and 3 and the mold 4 which is placed between the fixed platen 1 and the movable platen 3 from above or from the side when replacing the molds.

The controller 23 is a sensor, and the mold 4 is connected to the clamp 5.
This is to notify the NC device that the installation has been completed.

When the halves (4a, 4b) of the mold 4 are placed on each of the fixed platen 1 and the movable platen 3, and the installation using the clamps 5 is completed, the temperature control liquid passage 10 in the mold 4 is installed.
is connected to the temperature control liquid supply device 8 via the automatic connection structure 11 and the temperature control liquid passage 9 in each platen. In addition, the solenoid valve 1 is activated by the removal (=j) completion signal from the sensor 23.
．． The operation command for 5(a, b) is canceled, and
The solenoid valves 15 (a, b) are switched to the supply side by the NC device.

As a result, the supply hoses 1, 2.
13, the temperature control liquid is supplied to fixed platen 1 and movable platen 3.
The core 7 is maintained at a set temperature by being supplied to the core 7 and circulating through the mother mold 6 of the mold 4.

The solenoid valves 1.5 (a, b) are switched to the return side when replacing the mold 4 to prevent the temperature control liquid from spouting out when the mold is removed.

FIG. 4 shows the second embodiment, in which the fixed platen 1 and the movable platen 3 in the mold clamping part are connected to the core mounting part 24 (
a, b), and is configured in the mold matrix 6 (a, b) itself, and the core 7 (a, b) is directly attached to the matrix 6, that is, the platens 1 and 3. It is something. Therefore, fixed platen 1, movable platen 3
The temperature control liquid passage 9 has the same structure as the temperature control liquid passage 10 in the mother mold 6 of the above embodiment, and the core attachment is arranged around the part 24, and the temperature control liquid supply device is directly attached to it. The liquid supply path from 8, that is, the supply hose 12.13 is connected to the solenoid valve 15.
connected via.

Such a structure is essentially a temperature control mechanism for the platen.

There is no particular difference in operation as a temperature control mechanism from the previous embodiment.

FIG. 5 shows a third embodiment, in which a temperature control liquid passage 25 is further provided in the core 7 of the substantial platen temperature control mechanism, and is connected in series with the temperature control liquid passage 9 (a, b) on the platen side. It is connected to the. Further, the temperature regulating liquid passage 25 of the core 7 and the temperature regulating liquid passage 9 (a, b) in each platen 1, 3 are connected by the same automatic connection structure 11 as described above. However, in this case, since the core 7a is attached to the fixed platen 1 by sliding it from both sides, the structure shown in FIG.
0 has fewer protruding claws and a smoother surface.

There is no particular difference in operation as a temperature control mechanism compared to the previous embodiment.

In the second and third embodiments, the injection work is performed by attaching a mold consisting of a core 7 and a mother die 6 to platens 1 and 3, but since the molded product is small, the mold itself cannot be replaced. The technique is that it is sufficient to replace the core 7 with the molding cavity, which corresponds to the case where the mother mold 6 is hardly ever replaced, and that it is more rational to configure the platen 1.3 itself as the mother mold. It is based on the idea of

In addition, when forming the temperature regulating liquid passage 25 inside the core 7 as in the third embodiment, when it is necessary to accurately position this passage 25 with the temperature regulating liquid passage 9 on the platen side, The core 7 is configured to have a polygonal cross section so that the angle around the axis of the core is determined when the core is installed.

The above is an example.

The structure for attaching the mold and core is not limited to that of the embodiment.

The structure of the temperature-regulating liquid passage formed in the platen and the mother mold or core is not limited to that of the embodiment. When making the platen, mold or core, a bent tube is inserted into the required shape and formed. It is also possible to have a structure in which a communication path reaches this pipe from the outside.

Effects of the Invention Since the mold temperature control hose is fixedly connected to the fixed platen and the movable platen, and is also automatically connected to the mold mother mold, the time required to attach and detach the temperature control liquid supply hose is reduced. The effort is reduced.

Since the temperature control liquid supply hose is fixedly connected to the platen, it remains in a fixed position, and there is no need to worry about the temperature control liquid supply hose being in an unexpected position during work.

[Brief explanation of drawings]

Fig. 4 is a plan view shown in cross section, Fig. 2 is a perspective view shown in perspective, Fig. 3 (a) is an enlarged view of the main part shown in cross section, and the same (b) is an enlarged view of another embodiment. Similarly, FIG. 4 is a cross-sectional plan view of the second embodiment, and FIG. 5 is a cross-sectional plan view of the third embodiment. 1...Fixed platen, 3...Movable platen, 4...
・Mold, 6... Mother mold, 7... Core, 8... Temperature control liquid supply device, 9, ]0... Temperature control liquid passage, 11-... Automatic connection structure, 12 .13... Supply hose. \Talent■

Claims (3)

[Claims] (1) Temperature control liquid passages are formed in the fixed platen and movable platen of the mold clamping part, one end of which is connected to the liquid supply path from the temperature control liquid supply device, and the other end of which is connected to the temperature control liquid passage inside the mold. A mold temperature control mechanism characterized in that passages are connected through an automatic connection structure. (2) The fixed platen and the movable platen of the mold clamping part are provided with a core attachment part, and a temperature control liquid passage is formed therein to reach the periphery of the core attachment part, and a temperature control liquid supply device is supplied to the passageway. A mold temperature control mechanism characterized by a liquid supply path being connected. (3) The fixed platen and the movable platen of the mold clamping part are provided with a core mounting part, and a temperature control liquid passage is formed inside each of these platens and the core, and one end of the temperature control liquid passage of the platen is provided with a temperature control liquid passage. A mold temperature control mechanism, characterized in that a liquid supply path from a liquid supply device is connected to the other end, and a temperature control liquid path of a core is connected to the other end via an automatic connection structure.