JPS6323129Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a locking device for locking a mold for molding plastic.

Conventionally, as shown in FIG. 1, a fitting member 1 on which a protrusion 1a is formed is fixed to one mold 2a, and a holder 3 is fixed and arranged to the other mold 2b. Rotatable holding members 5a and 5b are arranged on two support shafts 4 arranged at a predetermined interval, and opposing end surfaces of these holding members 5a and 5b are connected to the protrusion 1a formed on the fitting member 1. A pressing spring 6 is arranged between the side wall 3a of the holding body 3 and the holding members 5a, 5b, and the fitting member 1 is pressed against the pressing force of the spring 6 to push each holding member. 5a, 5b, and the protrusion 1a formed on the fitting member 1 and the holding members 5a, 5
By fitting the end face of b, the fitting member 1
A locking device is known that locks the molds 2a and 2b by holding them in a predetermined position.

However, in the locking device described above, since the holding members 5a and 5b that hold the fitting member 1 are rotatable, the mold 2 on the side where the fitting member 1 is fixed is
If the force applied when separating and moving a is not applied equally to the left and right springs 6, or if the pressing force of the left and right springs 6 is not uniform, 2
When separating the two molds 2a, 2b, the molds 2a, 2
In some cases, the separation direction of b is not perpendicular to the contact surface of both molds 2a and 2b, and unreasonable force is applied to the molded plastic, which tends to deform the plastic and even cause it to break. There are drawbacks.

The object of the invention is to provide a locking device that can overcome the above-mentioned drawbacks.

The present invention includes a holder that is fixed to the side wall of one mold and has a hole formed therein, and a holder that is fixed to the side wall of the other mold and that can be fitted into the hole of the holder and is fitted into the hole. A fitting member having a recess formed in a portion thereof; and a pressure contact member that fits and presses against the recess formed in the fitting member when the fitting member is inserted into a hole of a holding body, and maintains the fitting member in a predetermined position. , and a spring that urges the pressure contact member toward the fitting member, so that when the fitting member is inserted into the hole of the holder, the fitting member comes into close contact with the hole wall of the hole of the holder or the side wall of the mold. It is characterized by the following.

An embodiment of the locking device of the present invention is shown in FIGS. 2 to 8, and the present invention will now be described in detail based on these figures.

In FIGS. 2 and 3, reference numeral 7 indicates a mold that can be separated at the center. A locking device of the present invention is provided on the side end surfaces of the left mold 7a and the right mold 7b to lock them.

This locking device consists of a holder 8 fixed to the mold 7a on the left side and a fitting member 9 fixed to the mold 7b on the right side.

As shown in FIG. 4, the holding body 8 consists of a pedestal 8a and a spring support 8b.
a and the spring support body 8b are connected by bolts 10, as shown in FIG. A hole 8c is formed in the pedestal 8a. This pedestal 8a
is fixed with the end surface on the side where the hole 8c is formed in contact with the side wall of the mold 7a. A holding hole 8d communicating with the hole 8c is formed in the wall of the hole 8c on the side of the spring support 8b. This holding hole 8
A cylindrical pressing member 11 is movably arranged in the hole 8c so that a part of its circumferential surface can protrude into the hole 8c. A support hole 8e is formed in the spring support body 8b at a position facing the holding hole 8d of the pedestal 8a.
A pressing spring 12 is arranged inside. The pressing member 11 disposed in the holding hole 8d of the pedestal 8a is urged toward the hole 8c by the spring 12 with a predetermined pressure. The pressing force of the pressing member 11 always remains constant because the position of the bolt 10 is maintained by the positioning bolt 13 disposed on the pedestal 8a.

As shown in FIG. 6, the fitting member 9 has a recess 9b formed in its fitting portion 9a, and an inclined surface 9c at its front end. This fitting member 9 is fixed to the mold 7b with a part of the end surface opposite to the end surface in which the recess 9b is formed in contact with the side wall of the mold 7b.

When the fitting part 9a of the fitting member 9 fits into the hole 8c formed in the holder 8, the fitting member 9
The pressing member 1 resists the pressing force of the spring 12.
1 is inserted between the pressure contact member 11 and the side wall of the mold 7a while pressing and moving the member 1, and the pressure contact member 11 is fitted into the recess 9b of the insertion member 9 and stopped in a state where the pressure contact member 11 is pressed by the pressing force of the spring 12. be done.
When the press member 11 is fitted into the recess 9b of the fitting member 9 and is pressed into contact with the press member 9, the press member 9 and the press member 1
The fitting member 9 and the pressing member 11 are engaged by the pressing force and frictional force acting between the fitting member 9 and the pressing member 11.
and the holding body 8 are engaged. As a result, the holding body 8
The mold 7a to which the fitting member 9 is fixed and the mold 7b to which the fitting member 9 is fixed are locked in a predetermined position. In this case, the fitting member 9 is brought into close contact with the side wall of the mold 7a and also with the wall of the hole 8c of the holder 8.

As shown in FIGS. 2 and 3, the mold 7
A pedestal member 14 is placed in contact with the mold 7a at the left end portion of a. A separation stopper 15 is fixed to this pedestal member 14, and a long hole 15a is formed in this separation stopper 15. Further, a pin 16 is provided protruding from the mold 7a, and this pin 16 is fitted into the elongated hole 15a of the separation stopper 15. When the mold 7a is placed in contact with the pedestal member 14, the pin 16 is inserted into the elongated hole 15 of the separation stopper 15.
It is located in the middle of a.

At the right end of the mold 7b, a holding connecting member 17 is fixedly arranged to the mold 7b. The other end of this holding and connecting member 17 is connected to a driving means (not shown).

A plastic solution is injected into the mold 7 from an injection port (not shown) of the pedestal member 14, and the plastic solution is molded into a predetermined shape. After the plastic solution is molded, the holding and connecting member 17 is moved in the direction of arrow X by the driving force of a driving means (not shown). In this case, in the mold 7, the pin 16 is connected to the elongated hole 15 of the separation stopper 15.
It is moved while sliding inside a. When the pin 16 reaches the rightmost end of the elongated hole 15a, it is stopped by the separating stopper 15, thereby stopping the mold 7a. When the mold 7a is stopped by the separation stopper 15, the holder 8 is also stopped, and when the mold 7b is further moved in the direction of arrow X by the driving means, the fitting member 9 fixed to the mold 7b is also stopped. Since the fitting member 9 is moved in the direction of the arrow X, the fitting member 9 presses the pressing member 11 against the pressing force of the spring 12 and moves away from the pressing member 11 and the side wall of the mold 7a, thereby separating the two molds 7a. , 7b are separated. When separating the two molds 7a and 7b, the pressure contact member 11 applies a pressing force to the fitting member 9 in a direction perpendicular to the separation direction of the molds 7a and 7b, and the fitting member 9
While being guided by the side wall of the mold 7a and the wall of the hole 8c of the holder 8, the fitting member 9 is brought into contact with the pressure member 11 and the mold 7.
Since the plastic in the mold 7 is separated from the side wall of the mold 7, no force is applied to change the separation direction when the molds 7a and 7b are separated in a direction perpendicular to the contact surface of the molds 7a and 7b. No excessive force is applied to the

Another embodiment of the invention is shown in FIGS. 7 and 8 and will now be described.

This embodiment differs from the above-described embodiments only in the configuration of the pressure contact member 11 and the direction of pressure contact.

As shown in FIG. 7, a hole 8c is formed in the holder 8 fixed to the mold 7a. Two holding holes 8f communicating with this hole 8c are formed symmetrically from both end surfaces of the holding body 8. It is located within these holding holes 8f, and a portion thereof is located within the holes 8f.
A spherical pressing member 11 is movably arranged so as to be able to protrude into the inside c. A pressing spring 12 that urges the pressure contact member 11 in the direction of the hole 8c is arranged in the holding hole 8f. A spring support 8b that presses against the rear end of the spring 12 and generates a predetermined pressure on the spring 12 is fixed to the base 8a with bolts 10.

The fitting member 9 fixed to the mold 7b is the eighth
As shown in the figure, a recess 9b is formed near the center of both side surfaces of the fitting part 9a, and an inclined surface 9c is formed at the tip thereof. The fitting portion 9a of the fitting member 9 can be fitted into the hole 8c of the holder 8.

Similarly to the above, the fitting member 9 is fitted into the hole 8c of the holder 8 and fitted between the pressure contact member 9 and the side wall of the mold 7a, and the pressure contact member 11 is fitted into the recess 9b of the insertion member 9. The two molds 7a and 7b are locked in place by pressure contact, and
When the fitting member 9 is separated from between the pressure contact member 11 and the side wall of the mold 7a, the two molds 7a and 7b are separated.
are separated.

Also in this embodiment, two molds 7a and 7b are used.
When separating the molds 7a,
The pressing member 11 is applying a pressing force in a direction perpendicular to the separating direction of the molds 7b, and the fitting member 9 is pressing the molds 7a,
Since the fitting member 9 is separated from the pressing member 11 and the side wall of the mold 7a while being guided by the side wall of the mold 7b and the wall of the hole 8c of the holding body 8, the mold 7a, When separating mold 7b, no force is applied to change the direction of separation, so mold 7b
No excessive force is applied to the plastic inside.

Note that the holding body 8 may have a hole 8c that does not open on the side wall side of the mold 7a.

In the locking device of the present invention, when two molds are separated in a direction perpendicular to their contact surfaces, the fitting member does not shift from the direction of separation of the molds, so no force is applied to change the direction of separation of the molds. Since no excessive force is applied to the plastic in the mold, the plastic is less likely to be deformed or damaged.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing a conventional locking device in an exploded manner, Figs. 2 and 3 are views showing the locking device of the present invention in use, and Figs. A perspective view showing the main parts of the locking device, and FIGS. 7 and 8 are perspective views showing the main parts of other embodiments of the locking device of the present invention. 7... Mold, 8... Holder, 8c... Hole, 9...
...Fitting member, 9b... recess, 11... pressure contact member,
12...Spring.

Claims (1)

[Scope of utility model registration request] A holder that is fixed to the side wall of one mold and has a hole formed therein, and a holder that can be fitted into the hole of the holder and has a recess formed in the fitting part, and a fitting member having a portion thereof fixed to a side wall; and a pressure contact member that fits into and presses against the recess of the fitting member to maintain the fitting member in a predetermined position when the fitting member is fitted into the hole of the holding body. A spring biases the pressure contact member toward the fitting member, and when the fitting member is inserted into the hole of the holding body, the fitting member comes into close contact with the hole wall of the holding body or the side wall of the mold. A locking device featuring: