JPH039886Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to an operation detection structure for a core cylinder in a mold used for die casting, plastic molding, etc. The present invention relates to a detection structure that electrically detects the operation of a core cylinder in conjunction with a limit switch.

<Prior art> Conventionally, the operation of the core cylinder B installed (vertically installed) on the lower surface of the mold A is detected, that is, whether the movable core C has been firmly introduced into the cavity a, or if the movable core C has been set in the cavity a. Electrical detection of whether or not the core has been reliably pulled out from inside and returned to the standby position outside the cavity a is performed by connecting the piston shaft _b1 of the core cylinder B and the movable core C, as shown in FIG. The actuating member 2, which has one end connected to the coupling 1 that connects the connecting shaft _c1 , faces downward, and the other side is attached to the bracket F, which holds the core cylinder B in a hanging manner on the lower side of the mold A. This is done by linking the upper and lower limit switches 3 and 4 individually through a vertical plate 20.

Therefore, after the product is taken out, the mold release agent, lubricating oil, etc. sprayed on the cavity surface _A1 of the mold A drips onto the limit switches 3 and 4, which malfunction and cause the die casting machine to start casting. If the cycle is disrupted or does not work properly, or when the mold A is replaced, the power cord 11 connected to the limit switches 3 and 4 comes into contact with the die casting machine and breaks the cord 11. This has become a major problem in this type of die-casting industry, as it has the potential to cause a number of troubles.

<Problem to be solved by the invention> The technical problem to be solved by the invention is to develop a limit switch that electrically detects the operation of the core cylinder installed on the lower side of the mold in conjunction with an operating member. The purpose is to prevent malfunctions and eliminate disconnection accidents of the power cord connected to the limit switch.

<Means for solving the technical problems> The technical means taken by the present invention to solve the above problems is that the piston shaft of the core cylinder and the connecting shaft of the movable core are installed on the lower side of the mold. An operating member connected to one end of the coupling ring is mounted so as to be able to move up and down in accordance with the operation of the core cylinder, with the operating member facing upward from the upper surface of the mold, and the other end of the operating member is located in the mold. It is characterized in that a limit switch is disposed at the upper and lower parts via an upright plate, and is linked to a transmission linking ring attached to the outside of the other end of the operating member.

<Operation> According to the above-described technical means of the present invention, the operating member is moved up and down following the operation of the core cylinder installed on the lower side of the mold, and the upper and lower movement of the operating member is caused to move up and down. At the upper and lower limits of movement, the upper end (other end) outer transmission linking ring mounted on the mold is individually linked to the upper and lower limit switches arranged on the mold to control the core cylinder. Actuation detection,
That is, the operating position of the movable core is detected on the mold to determine whether the movable core has been reliably introduced and set into the cavity, or whether it has been reliably pulled out from the cavity and returned to a standby position outside the cavity.

<Example> An example of the present invention will be described based on the drawings.
In the figure, A is the mold, B is the cylinder for the core, _b1 is the piston shaft of the cylinder B for the core, C is the movable core, _c1 is the connecting shaft of the movable core C, and 1 is the both axes.
A coupling that connects b ₁ and c ₁ , 2 is an operating member,
3 and 4 are limit switches for entering and returning, which are recessed in the piston shaft _b1 of the core cylinder B installed on the lower side of the mold A and the dividing surface of the lower part of the cavity a of the mold A. One end of the actuating member 2 is connected to the coupling ring 1 that connects the connecting shaft _c1 of the movable core C, which is vertically slidably installed in the fitting groove 5. Mounted so that it can move up and down upwards.

The actuating member 2 individually transmits the reciprocating operation of the core cylinder B, that is, the forward and backward movement of the piston shaft _b1 , to the entering limit switch 3 and the returning limit switch 4 at their operating limits, so that both switches 3, 4 is for ON/OFF switching, and the connection part 1 provided on the outside of the coupling 1.
A supporting arm rod 201 is connected and fixed at one end to protrude parallel to the lower side surface of the mold A, and this arm rod 2
A connecting arm rod 202 is attached to the tip of the arm rod 202 at a right angle to the tip of the arm rod 202 and is mounted parallel to the lower side of the mold A toward the back side of the mold A. The lower end) is connected and fastened to a slide operating rod 203 which is vertically movable upwardly facing the upper side of the mold A.
A transmission linking ring 7 is attached to the outer side of the rod portion located in front of the standing plate 6 of 03, which is linked to the limit switches 3 and 4 for entering and returning, respectively.

The sliding rod 203 is vertically movably engaged by a presser 9 into a vertical groove 8 recessed over the entire height of the die base E that attaches and holds the mold A to the movable platen D. The tip of the upright plate 6 screwed upright on E, extending over the entire height of the front surface, is free to pass through the guide receiver 10 attached to the upper position of the front surface of the plate 6 on the extension line of the vertical groove 8. Fit and engage.

The limit switches 3 and 4 have a well-known structure, and are attached to the upper and lower sides of the slide rod 203 on the front surface of the standing plate 6 so as to be individually linked with the transmission link ring 7 at the upper and lower limits of movement of the slide rod 203. They are installed and arranged at their respective positions. That is, the movable core C is set in the cavity a at the forward limit of the piston shaft _b1 , which moves forward and backward by the operation of the core cylinder B, which is fixed and held in a hanging manner on the lower side of the mold A via the bracket F. so that the arm _3a of the entry limit switch 3 is turned ON or OFF in conjunction with the transmission linking ring 7 when The arms 4a of the return limit switches 4 are respectively disposed on the front surface of the standing plate 6 so as to be turned ON or OFF in conjunction with the transmission linking ring 7 when the limit switch 4 is returned to the inside.

Thus, in this embodiment, the piston shaft _b1 of the core cylinder B installed on the lower side surface of the mold A and the connecting shaft of the movable core C introduced and set into the cavity a from the lower part of the cavity a. One end of a supporting arm 201 forming the actuating member 2 is connected and fixed to the coupling ring 1 that connects the arm 201, and one end of the connecting arm 202 is connected and fixed to the tip of the arm 201 _. Slide operating rod 20 at the tip of 202
Connect one end of 3 and attach it to the core cylinder B.
The sliding operation rod 203 is operated in accordance with the operation of
As an operation detection structure for the core cylinder B, which is electrically connected to the limit switches 3 and 4 for entering and returning on the front surface of the standing plate 6 erected on the die base E by means of a transmission linking ring 7 attached to the outside of the die base E. , detection of the operation of the core cylinder B, that is, whether the movable core C is introduced into the cavity a at the time of the mold clamping shot, or whether the movable core C is pulled out from the cavity a until the next mold clamping shot. Electrical detection is performed on the mold A as to whether or not it has returned to the insertion groove 5, which is the standby position.

In the above embodiment, the connecting arm 202 was provided between the supporting arm 201 and the slide operating lever 203 to form the operating member 2, but the supporting arm 201 was connected from the coupling 1 to the back side of the mold A. It is also optional to attach the slide rod 203 so as to protrude sideward in a planar inclined manner and to directly connect one end (lower end) of the slide operation rod 203 to the tip thereof. In addition, 11 in the figure indicates both limit switches 3,
The power cords are individually connected to 4.

FIG. 5 shows another embodiment in which a part of the actuating member 2 is formed using a wire 210.
0 is connected to the front surface of the standing plate 6 on the die base E via guide pulleys 12 installed at several locations along the way, and the guide holder 10 is mounted on the front surface of the standing plate 6. A short slide operating rod 21 is mounted so as to be vertically movable through the
The other end of the wire 210 is connected to the lower end of the transmission link ring 7 which is fixed to the outside of the slide operating rod 211 to control the limit switch 3 for entering and returning.
4 are individually linked in transmission. In this case, as shown in the figure, a tension spring 212 is connected to the upper end of the short slide operating rod 211 to follow the movement of the movable core C being pulled out of the cavity a and returned to the insertion groove 5. to move the short slide operation rod 211 upward.

<Effects of the invention> Since the operation detection structure of the core cylinder in the mold of the invention is constructed as described above, it achieves the following effects.

The operating member is moved up and down in accordance with the operation of the core cylinder installed on the lower side of the mold, and at the upper and lower limits of movement, the upper end outside of the cylinder mounted on the mold is transmitted. Since the operation of the core cylinder is detected on the mold by individually linking the linking rings to the upper and lower limit switches disposed on the mold, the release sprayed on the cavity surface of the mold can be prevented. It is possible to reliably prevent the limit switch from malfunctioning due to dripping of molding agent, lubricating oil, etc. Therefore, since the limit switch can be operated normally at all times, troubles such as those caused by disturbances in the casting cycle of the die casting machine are eliminated.

Furthermore, since the limit switch is disposed on the mold, the power cord connected to the limit switch can be placed on the die casting machine. Therefore, there is no risk of the power cord coming into contact with the die-casting machine and being disconnected when replacing the mold, unlike in the past.

Thus, the intended purpose can be achieved.

[Brief explanation of the drawing]

The drawings show an embodiment of the operation detection structure of the core cylinder in the mold of the present invention, and FIG. 1 is a longitudinal sectional front view showing the main part with a part cut away, FIG. 2 is a plan view of the same, and FIG. Figure 3 is the same side view with some parts omitted.
FIG. 4 is a longitudinal sectional front view showing another embodiment in which the operating member is formed using a wire for a part of the operating member, partially cut away, and FIG. 5 is a longitudinal sectional front view showing a conventional example. . In addition, in the figure, A: Mold, a: Cavity, B: Cylinder for core, _b1 : Piston shaft, C: Movable core, _c1 : Connection shaft, 1: Coupling, 2: Operating member, 3, 4: Limit switch, 6: Standing plate.

Claims (1)

[Scope of utility model registration request] In a structure for detecting the operation of a core cylinder in a mold, a core cylinder is installed on the lower side of the mold, and the operation of the core cylinder is linked to a limit switch to electrically detect the operation of the core cylinder. The operating member, one end of which is connected to a coupling that connects the piston shaft of the cylinder for the core and the connecting shaft of the movable core, is mounted so that it can move up and down to follow the operation of the cylinder for the core, facing upwards on the upper side of the mold. , on the mold where the other end of the actuating member is located, a limit switch is disposed at the upper and lower part via an upright plate, and is linked to a transmission linking ring attached to the outside of the other end of the actuating member. Features a structure for detecting the operation of the core cylinder in the mold.