JPS6342825A - Mold device for molding hole of product - Google Patents

Abstract

PURPOSE:To prevent a molder from a trouble and permit the stabilized production of a product formed with a hole surely, by a method wherein a driving pin, projected out of the mating surface of a mold, is pushed upon mating the mold and an interlocking member is pivoted by the pin to advance a terminal of a boring pin into the cavity of a mold. CONSTITUTION:Under a condition that a fixed mold 12 and a movable mold 13 are opened, the tip end surface of the pin part 28 of a boring pin 27 is positioned so as to be flush with the surface 14a of a cavity in the mold by the resilient energization of a spring 31 while the lower end of a driving pin 34 is pushed by the other arm 23 of an interlocking member 21 and the upper end of the driving pin 34 is projected out of the upper surface of a horizontal part 16. When the fixed mold 12 is mated with the movable mold 13 subsequently, the upper end surface of the driving pin 34 becomes flush with the upper surface one of the horizontal part 16, and the lower end of the driving pin 34 pushes one arm 23 of the interlocking member 21. The other arm 22 of the interlocking member 21, being pushed, pushes the boring pin 27 against the spring 31 and the pin part 28 advances into the mold cavity 14 and is abutted against the fixed mold 12. Then, the mold cavity 14 is filled with molten synthetic resin by injection whereby a product 40 having a hole 40a, may be molded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Objective of the Invention) (Industrial Application Field) The present invention relates to a mold device for forming a hole in a product to be molded within a desired cavity.

(Prior Art) A mold bag d for forming a hole in a product to be molded in the mold 1 cavity is made up of a mold 3 made up of a fixed mold 1 and a movable mold 2, as shown in FIG. Fixed type 1 and movable type 2
A mold cavity 5 in which a product 4 made of synthetic resin is injection molded is formed on the mating surface thereof, and a mold cavity 6 is disposed inside the movable mold 2 so as to be retractable into the mold cavity 5. Cylinder 7 that drives this rod 6 forward and backward
is arranged outside the movable mold 2. In addition, movable J8!
A limit switch (not shown) is used to confirm the reverse movement of the rod 6 disposed inside the rod 2.

Then, the fixed mold 1 and the movable mold 2 are closed, hydraulic pressure is applied to the cylinder 7, the rod 6 is made to protrude into the mold cavity 5, the mold cavity 5 is injected and filled with molten synthetic resin, and further, After the synthetic resin has solidified, the cylinder 7 is operated to move the rod 6 backward, and the fixed mold 1 and the movable mold 2 are opened, so that the product 4 having the hole 4a can be molded.

[Problems to be Solved by the Invention] In the conventional mold device as described above, the rod 6 is operated by the cylinder 7, and the operation of the rod 6 is confirmed by a limit switch. There was a problem that the molding machine stopped operating due to a malfunction, and a problem that the hole formation of the product 4 was unstable due to malfunction of the limit switch due to electric leakage.

Issue 11 was created in view of the problems mentioned above.
The object of the present invention is to provide a mold device for forming holes in a product, which prevents malfunctions of the molding machine and allows stable production of products with holes formed therein.

[Structure of the invention]

(Means for solving the problem) The mold device for forming a hole in a product according to the present invention has two arm parts 2.
A connecting member 21 configured to be able to rotate around a fixed shaft 20, and a connecting member 21 configured to be able to move freely into and out of the mold cavity 14, with one end surface being flush with the surface of the mold cavity 14a. The hole, which is biased and arranged so that the other end presses one arm portion 22 of the connecting member 21 by this elastic force, connects the pin 27 and one arm portion 22 of the connecting member 21. The hole is a stopper member 3 for stopping the rotational movement of the arm portion 22 at a position where one end surface of the pin 27 is flush with the surface of the mold cavity 14a.
2, is attached so as to be slidable in the length direction, and is arranged so that one end is pressed against the other arm portion 23 of the connecting member 21, and the other end is moved only a predetermined stroke away from the mold mating surface. Drive pin 3 arranged to protrude
It is composed of 4.

(Function) In the mold device for forming a hole in a product according to the present invention, when the mold is opened, the hole is elastically biased so that one end surface of the pin 21 is flush with the surface of the mold cavity 14a. The driving pin 34 is made to protrude from the mold mating surface by the pressure of the connecting member 21 rotated by the elastic force of the pin 27, and when the molds are joined, the driving pin 34 is not projected from the mold mating surface. When the driven pin 34 is pressed, the hole makes the connecting member 21 rotate against the spring bias of the pin 27, and the hole makes one end of the pin 27 advance into the mold cavity 14. This is what I did.

(Example) Hereinafter, the configuration of an example of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, a molding die 11 is composed of a fixed die 12 and a movable die 13, and a mold cavity 14 is formed on the mating surface of the fixed die 12 and movable die 13.

The movable mold 13 has the insert piece 15 that can be inserted into the movable mold 13.
is inserted into the piece storage part 13a opening on the top surface of the
The upper surface of this insertion piece 15 is provided along the upper surface of the movable mold 13, and the upper surface has a horizontal portion 1 that joins with the fixed mold 12.
G is provided, and an inclined part 17 facing the end of the mold cavity 14 is provided, and a support plate part 18 is provided at the lower part on the negative side (the front side in FIG. 1 and the upper side in FIG. 2). At the same time, a space 19 is provided on the other side.

In the space 19 of the insertion piece 15, a connecting member 21 rotatably supported by a fixing member 20 protruding from the support plate 18 is disposed. It has two arm parts 22 and 23.

The sloped part 17 of the insert chest 15 facing one arm part 22 of the connecting part 4121 has a small diameter hole opening into the mold cavity 14, which is provided perpendicularly to the mold cavity surface 14a on the upper surface of the sloped part 11. 24 and this small diameter hole gIs2
4 and the space 19 is provided with a pin sliding hole 26 consisting of a large diameter hole portion 25, and a hole number pin 21 is arranged in this pin sliding hole 26 so as to be slidable in the axial direction. The pin 27 has a pin portion 28 disposed in the small diameter hole portion 24 so as to be slidable in the axial direction in an airtight manner, and a gap 11 in the large diameter hole portion 25.
The tip of the pin part 28 is movable into and out of the mold cavity 14 and can come into contact with the fixed mold 12 facing the mold cavity 14. A ring 30 that slides inside the large diameter hole 25 is fitted near the tip of the portion 29, and a spring 31 is disposed between the ring 30 and the inside of the large diameter hole 25. Due to the elastic force, the tip of the large diameter shaft portion 29 presses one arm portion 22 of the connecting member 21.

In addition, a stopper member 32 is provided in the space 19 so as to protrude from the support plate part 18 so as to face one arm part 22 of the connecting member 21 . The rotation of one of the arm portions 22 is restricted by a hole 2 such that the tip end surface of the pin FIS 28 of the pin 27 is flush with the mold cavity 14a on the upper surface of the inclined portion 17.

Insert piece 1 facing the other arm portion 23 of the connecting member 21
A pin sliding hole 33 is provided in the horizontal portion 16 of No. 5, which is perpendicular to the upper surface of the horizontal portion 16 and opens between the upper surface and the space portion 19.
is provided, and a drive pin 34 is arranged in the pin sliding hole 33 so as to be slidable in the axial direction. this! S-sapping pin 34↓
A long groove 35 is installed along the axial direction in the side part, and the horizontal part 16 is inserted into the long groove 35 from the side, but the id pin 36 fits therein and prevents vertical handling.
When the fixed mold 12 and the movable mold 13 are in the open state, the connecting member 21
The upper end of the drive pin 34 is pushed by the other arm part 23 of the horizontal part 16, and when the fixed mold 12 and the movable mold 13 are in the closed state, the drive pin 34 is pressed by the lower surface of the fixed mold 12 and The upper end is flush with the upper surface of the horizontal portion 16, and the lower end of the drive pin 34 presses the other arm portion 23 of the connecting member 21.

Then, when the fixed mold 12 and the movable mold 13 are open, the pin 27 presses one arm portion 22 of the connecting member 21 to open the hole due to the elastic bias of the spring 31. The arm portion 22 is pressed against the stopper member 32. In this state, the tip of the pin portion 28 of the pin 27 is positioned flush with the mold cavity surface 14a, and
The drive pin 34 is connected by the other arm portion 23 of the connecting member 21.
The lower end of the drive pin 34 is pressed, and the upper end of the drive pin 34
It protrudes from the top of 6.

Next, when the movable mold 13 is joined to the fixed mold 12, the upper end of the drive pin 34 is pressed against the lower surface of the national standard mold 12, and its upper end surface becomes flush with the upper surface of the horizontal part 16, and the drive pin The lower end of 34 presses the other arm portion 23 of the connecting member 21. When the connecting member 21 is pressed against the other arm portion 23, the one arm portion 22 presses the pin 27 against the spring 31.
8 enters the mold cavity 14 and comes into contact with the fixed mold 12 facing the mold cavity 14.

Then, the mold cavity 14 is injected and filled with molten synthetic resin to mold the product 40 provided with the holes 40a.

Furthermore, when the movable mold 13 is released from the fixed mold 12 after the molten synthetic resin has solidified, the drive pin 34 can be slid upward as the movable mold 13 is moved to release, so that the spring 31 is resilient. The connecting member 21 is rotated by the force, and the pin portion 28 of the pin 27 gradually comes out of the hole 40a of the product 40, and one side of the connecting member 21 is opened.

When the arm portion 22 comes into contact with the stopper member 32, the pin portion 28 can be completely removed from the hole 40a, returning to the above mold open state, and the product 40 can be taken out from the mold.

In the above embodiment, the case where the hole 40a is formed in the product 40 has been described, but the hole is formed in the pin portion 28 of the pin 21.
By adjusting the distance between the protrusions into the mold cavity 14, the product 40 can be formed with an inside l, and the pin r
Adjustment of the amount of protrusion of A28 is determined by the axial lengths of the pin 27 and drive pin 34, the angles of the two arm portions 22 and 23 of the connecting member 21, the arrangement of each member, and the like.

(Effects of the Invention) According to the present invention, in the mold opening mechanism, the hole drill is elastically biased so that one end surface of the pin is flush with the mold cavity surface, and the hole drill is elastically biased so that one end surface of the pin is flush with the mold cavity surface. The drive pin is pushed out from the mold mating surface by the pressure of the connecting member rotated by the elastic force of the pin, and at the time of mold joining, the drive pin that had been projected from the mold mating surface is suppressed. In response, the connecting member is rotated against the elastic force of the pin, and one end of the pin is advanced into the mold tip, so that the hole is reliably drilled during product molding. The pin can be advanced into the desired cavity to form a hole in the product, preventing malfunctions of the molding machine and producing products with stable quality.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the mold apparatus for forming holes in products according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a sectional view showing a conventional mold apparatus. 14...Mold cavity, 14a...Mold cavity surface,
20...Fixed shaft, 21...Connection member, 22.23...Arm portion, 27...Diagram is pin, 32...Stopper member, 34...Drive pin.

Claims (1)

[Claims] (1) A connecting member configured so that the two arm parts can rotate around a fixed axis, and an elastic member that is provided so that it can freely move in and out of the mold cavity, and one end surface is flush with the mold cavity surface. a drilling pin which is biased and arranged so that the other end presses one arm of the connecting member by the elastic force; and rotational movement of the one arm of the connecting member. a stopper member for stopping the drilling pin at a position where one end surface of the drilling pin is flush with the mold cavity surface; and a stopper member that is attached to be slidable in the length direction and one end of which is attached to the other arm of the connecting member. A mold for forming a hole in a product, characterized in that it is comprised of: a drive pin which is arranged so as to be pressed against the part of the mold and whose other end protrudes from the mold mating surface by a predetermined stroke; Device.