KR200469877Y1 - Fixing Apparatus of Core Rotation for Multi Injection mold - Google Patents

Abstract

The present invention is the upper mold having a main core plate forming a part of the first cavity (Cavity), the lower mold having a main core plate forming a part of the second cavity (Cavity), and separated from the upper mold and the lower mold In the multi-injection mold consisting of the middle plate forming the main cavity plate, the separation and mold separation, the rotating core forming the first and second cavities, the servo motor and the rotating means for rotating the rotating core; A hydraulic cylinder fixed to the outer side of the middle plate by a bracket to be installed and operated toward the rotating core; A slide core configured to be connected to the cylinder of the hydraulic cylinder to fix and axially rotate the rotating core by accompanying forward and backward movements; The rotary core is fixedly installed on the outer surface of the rotary core so that the front end of the slide core is inserted into the middle plate without flow, and the front end of the slide core is moved backward and separated to separate the rotary core from the middle plate. An interlock having a locking hole for freely rotating; The present invention relates to a rotating core fixing structure of a multi-injection mold installed on the middle plate and having a slide core bush wrapped around and protecting the cylinder and the slide core of the hydraulic cylinder, and at the same time inducing its forward and backward operations more smoothly.
The present invention has no damage to the rotating core and the middle plate by fixing the impact without the impact of the rotating core compared to the prior art, and the horizontal angle is plus (+) minus (-) tolerance range from 0 degree after the rotating core is rotated 180 degrees Even if it is outside, due to the angle of the slide core end can be exactly 0 degrees, the horizontal angle, and by accurately adjusting the horizontal angle to 0 degrees, there is an effect that can eliminate the scratches of the main cavity and the main core during mold closing.

Description

Fixing Apparatus of Core Rotation for Multi Injection Mold}

The present invention relates to a rotating core fixing structure of a multi-injection mold formed to mold each different mold material in one mold, and more specifically, to fix a rotating core of a multi-injection mold having a rotating means accurately. By providing means, it prevents the damage of the rotating core and the middle plate by fixing without rotating the impact of the rotating core when rotating 180 degrees compared with the prior art, and multi-injection mold that can prevent the scratch of the main cavity and the main core when mold closing The rotating core fixed structure of the present invention.

Figure 21 is an exploded perspective view showing a rotating core fixing structure of the conventional multi-injection mold, Figure 22 is an enlarged perspective view of the main portion showing the state of the rotating core and the plate of Figure 21, the prior art of the general multi-injection mold, different release materials The upper mold (05) having a main core plate forming a part of the first cavity (01) and the lower part having a main core plate forming a part of the second cavity (02) 02 so as to form the respective shapes. The mold (06), the middle plate (04) which is separated from the upper mold (05) and the lower mold (06), is joined and mold-separated to form a main cavity plate, and the rotations forming the first and second cavities (01, 02). A core 03 and a servo motor 07 which is a rotating means for rotating the rotating core 03 are provided. On one side of the outer circumferential surface of the rotary core 03 is formed an angle limiting projection 11 for limiting the angle of rotation during rotation of the rotary core 03, the angle limiting projection 11 when the rotation of the rotary core 03 It has a structure to limit the rotation angle by hanging on the locking step 12 provided on the inner peripheral surface of the middle plate (04).

In the conventional multi-injection mold having such a structure, when the rotating core 03 rotated by the servo motor 07, which is the rotating means, ends the rotation of 180 degrees, which is the rotation angle, the rotation core 03 becomes zero. The limiting projection 11 and the engaging jaw 12 of the middle plate 04 is in contact with, in this case, there is a problem that there is a risk of damage to the angle limiting projection 11 or the locking jaw 12 by the impact, Due to the repulsive force of the impact there was a problem that it is difficult to match the exact horizontal angle of 0 degrees. In addition, when the rotating core 03 is not 0 degrees, which is an accurate horizontal angle, there is a problem that a problem of scratching the main cavity plate and the main core plate occurs when the mold is closed.

The present invention is to solve the problems as described above, and to accurately fix the rotating core rotated by 180 degrees by the rotating means, the rotating core does not apply the impact in the mold after the rotation, thereby separate from the servo motor having a rotating means It is an object of the present invention to provide a rotating core fixing structure of a multi-injection mold that can adjust the rotating core to 0 degrees, which is exactly a horizontal angle, without the correction value of.

In order to achieve the above object, the present invention, an upper mold having a main core plate forming a part of the first cavity (Cavity), and a lower mold having a main core plate forming a part of the second cavity (Cavity), In the multi-injection mold, which is separated from the upper mold and the lower mold, the middle plate forming the main cavity plate, the rotating core forming the first and second cavities, the servo motor and the rotating means rotating the rotating core. In;

A hydraulic cylinder fixed to the outer side of the middle plate by a bracket to be installed and operated toward the rotating core;

In connection with the cylinder of the hydraulic cylinder is characterized in that it comprises a slide core for fixing and axially rotating the rotary core by accompanying forward and backward.

The rotary core is fixedly installed on the outer surface of the rotary core so that the front end of the slide core is inserted into the middle plate without flow, and the front end of the slide core is moved backward and separated to separate the rotary core from the middle plate. An interlock having a locking hole for freely rotating; It is characterized in that it further comprises a slide core bush installed on the middle plate to surround and protect the cylinder and the slide core of the hydraulic cylinder and at the same time more smoothly guides its forward and reverse operations.

The tip portion of the slide core has an angle and a tapered shape to facilitate insertion and separation, and the locking hole of the interlock corresponding thereto is also formed to have an angle and taper correspondingly.

As described above, the present invention has no damage to the rotating core and the middle plate by fixing the impact without the impact of the rotating core compared to the prior art, and also has a positive (-) negative value at 0 degrees after the rotating core rotates 180 degrees. Even if it is out of the tolerance range, the angle of the slide core end can be exactly 0 degrees, which is the horizontal angle, and by accurately adjusting the horizontal angle to 0 degrees, it is possible to prevent the scratches of the main cavity and the main core when the mold is closed. have.

It is to be understood that the present invention is not limited to the specific preferred embodiments described above and that various modifications can be made by those skilled in the art without departing from the scope of the present invention, Of course, such modifications are within the scope of the claims.

1 is a perspective view showing a state when the rotating core in the rotating core fixed structure of the multi-injection mold of the present invention embodiment,
Figure 2 is an enlarged perspective view of the main portion showing the shape of the middle plate and the rotating core when the rotating core in the rotating core fixed structure of the multi-injection mold of the present invention embodiment,
Figure 3 is a cross-sectional view showing a state when the rotating core in the rotating core fixed structure of the multi-injection mold of the present invention embodiment enlarged cross-sectional view,
Figure 4 is a cross-sectional view showing a state when the rotating core in the rotating core fixed structure of the multi-injection mold of the present invention embodiment,
Figure 5 is a perspective view showing a state when rotating and fixing the rotating core in the rotating core fixed structure of the multi-injection mold according to the present invention,
Figure 6 is a perspective view and a plan view showing the advanced state of the hydraulic cylinder and the slide core when the rotating core in the rotating core fixed structure of the multi-injection mold of the present invention embodiment;
Figure 7 is a perspective view and a flat view showing a reversed state of the hydraulic cylinder and the slide core during the rotation of the rotating core in the rotating core fixed structure of the multi-injection mold of the present invention,
8 is a perspective view showing a double injection molding in an embodiment of the present invention a multi injection mold,
Figure 9 is a perspective view showing a state opened primarily (die separation) in the multi-injection mold which is an embodiment of the present invention,
10 is a perspective view showing a second mold opening (mold separation) in the multi-injection mold of the present invention embodiment,
Figure 11 is a perspective view and enlarged side cross-sectional view showing a second cavity product take-out figure in the multi-injection mold which is an embodiment of the present invention,
12 is a perspective view showing the retraction of the slide core in the rotating core fixed structure of the multi-injection mold of the present invention embodiment and enlarged perspective view,
Figure 13 is a perspective view sequentially showing the 180-degree rotation of the rotating core in the rotating core fixed structure of the multi-injection mold of the present invention embodiment
14 is an enlarged perspective view showing main parts of the slide core when the slide core is fixed in the multi-injection mold rotating structure according to an embodiment of the present invention;
15 is a perspective view sequentially showing the state of the mold forming step in the rotating core fixed structure of the multi-injection mold of the present invention embodiment,
16 is a perspective view and a cross-sectional perspective view showing a state of the middle plate and the rotating core in the rotating core fixing structure of the multi-injection mold according to the present invention,
17 is an exploded perspective view showing a coupling state of a servo motor and a middle plate in a rotating core fixing structure of a multi-injection mold according to an embodiment of the present invention;
18 is an exploded perspective view and a plan view and a front view of an interlock in a rotating core fixing structure of a multi-injection mold according to an embodiment of the present invention;
19 is a perspective view showing a combination of the slide core and the hydraulic cylinder and the slide core bush in the rotating core fixed structure of the multi-injection mold according to the present invention,
20 is a perspective view showing a state of a slide core bush and a slide core and a hydraulic cylinder and a bracket in a rotating core fixing structure of a multi-injection mold according to an embodiment of the present invention;
Figure 21 is an exploded perspective view showing a fixed structure of the rotating core of the conventional multi-injection mold,
FIG. 22 is an enlarged perspective view illustrating main parts of the rotating core and the middle plate of FIG. 21; FIG.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Further, the terms described below are defined in consideration of functions in the present invention, and this may vary depending on the user, the intention or custom of the operator, and the like.

Therefore, it goes without saying that the definition should be based on the contents throughout this specification.

The rotating core fixing structure of the multi-injection mold of the present invention includes an upper mold (05) having a main core plate constituting a part of the first cavity (01), and a part of the second cavity (02). A lower mold (06) having a main core plate, a middle plate (04) separated from the upper mold (05) and a lower mold (06), joined and mold-separated to form a main cavity plate, and first and second cavities ( 01 and 02, the rotating core 03, the servo motor 07 and the rotating means for rotating the rotating core 03, and is fixed to the outer surface of the middle plate 04 by a bracket (25) The hydraulic core 21 installed and actuated to the rotating core 03 side and the slide core 22 fixed and axially rotating the rotary core 03 by being moved forward and backward together with the cylinder of the hydraulic cylinder 21. And, it is fixed to the outer surface of the rotary core 03 is the front end of the slide core 22 is inserted into the forward D. Locking to fix the rotating core 03 without flow in the middle plate 04, and freely position the rotating core 03 in the middle plate 04 as the front end of the slide core 22 is separated and separated. The interlock 24 having the hole 24A and the intermediate plate 04 are provided to surround and protect the cylinder of the hydraulic cylinder 21 and the slide core 22, and at the same time, to smoothly guide forward and backward operations thereof. The slide core bush 23 is formed.

In order to devise an accurate fixing structure of the rotary core 03, the middle plate 04 is provided with a slide core bush 23, the inside of the slide core bush 23, the seating and linear motion of the slide core 22 Form a passageway to allow. The slide core 22 is assembled to the hydraulic cylinder 21 for the operation of the slide core 22, and the assembled hydraulic cylinder 21 is assembled to the bracket 25. The bracket 25, in which the slide core 22 and the hydraulic cylinder 21 are assembled, is assembled to the middle plate 04 so that the slide core 22 has a structure in which linear motion is performed. The end of the slide core 22 is formed to be easily seated on the counterpart in an angled shape, and has a circular shape to minimize frictional force. The rotating core 03 is provided with an interlock 24 having a locking hole 24A for inserting / fixing the slide core 22. The locking hole 24A inside the interlock 24 is formed as a circular recess with an angle so that the slide core 22 can be inserted therein. The interlock 24 is inserted into the slide core 22 to form a fixed structure of the rotating core 03 of the present invention.

The present invention is made as a rotating core 03 fixed structure of a multi-injection mold capable of molding different release materials, respectively. That is, the horizontal angle of the rotating core 03 should be maintained at 0 degrees during the injection, mold separation, withdrawal, and molding of the mold, and the bracket 25 of the medium plate 04 will be held to maintain the rotating core 03 in a stationary state. Hydraulic cylinder 21 connected to the () is advanced, and thus the slide core 22 connected to the hydraulic cylinder 21 is advanced, and the locking hole (24A) of the interlock 24 connected to the rotating core (03) As such, the rotary core 03 has a stationary and fixed structure.

At the time of injection of the mold, the first cavity is molded with a first resin, and the second cavity is molded with a second resin of the same kind but different in color from a molded article composed of the first resin. When the rotating core 03 of the mold rotates, the hydraulic cylinder 21 connected to the bracket 25 of the middle plate 04 moves backward in order to maintain the rotating core 03 in a rotating state, and accordingly, the hydraulic cylinder 21 The slide core 22 connected to the reverse moves. Accordingly, the slide core 22 is separated from the locking hole 24A of the interlock 24 connected to the rotating core 03 to maintain a state in which the rotating core 03 can rotate.

When the fixed structure of the rotary core 03 is separated, when the servo motor 07 rotates 180 degrees, the rotating structure and the rotating core 03 connected thereto are rotated 180 degrees. After rotation, the hydraulic cylinder 21 connected to the bracket 25 of the middle plate 04 is advanced, the slide core 22 connected to the hydraulic cylinder 21 is advanced, the interlock 24 connected to the rotary core 03 The rotating core 03 is stopped and fixed by engaging with the locking hole 24A. Even if the tip of the slide core 22 is inserted into the locking hole 24A of the interlock 24 to give an angle to the end of the slide core 22, the rotating core 03 is exactly out of the error range of the horizontal angle, It will have a feature to have a zero degree.

The present invention is a double injection mold to be able to mold each of the different release materials, the mold separation method is made as follows from the molding step of the mold mold state.

8 is an injection (double injection) step, the upper mold (05) of the double injection molding machine is clamped on the fixed side, the lower mold 06 is clamped on the moving side of the double injection molding machine, the double injection molding machine after the clamping The transparent resin melted on the fixed side of the first injection molded product of the first cavity (01) is formed through the flow inlet of the upper mold (05) and the hot runner valve A through the fixed side nozzle. Simultaneously with the molding of the cavity 01, the resin of the translucent material (different release materials) melted on the moving side of the double injection molding machine passes through the flow inlet of the lower mold 06 and the hot runner valve B through the moving side nozzle. The inside of the double injection product of the cavity 02 is molded. The outer side of the second cavity 02 is a space for molding different release materials in a state in which the transparent product molded in the first cavity 01 is present.

9 is a mold opening primary stage, after the double injection molding and cooling of the double injection molding machine is completed, the mold opening primary stage is achieved. The upper mold 05 clamped on the stationary side of the molding machine is mold fixed, and the moving side. The lower mold 06 clamped in the mold is mold-separated (opened) according to the template of the molding machine. When the mold is separated, the urethane rod is restrained (forced or connected) to the lower mold 06 and the middle plate 04 to have a first stage of mold opening. Urentan rods are fixed to the lower mold (06). The first step of mold opening is performed by the stroke of the tension bar A fixed to the upper mold 05.

Fig. 10 is a secondary mold opening step, in which the tensile rod A fixes the position of the middle plate 04 after the primary opening step is performed by the stroke of the tension bar A. At the same time as the fixing of the middle plate 04, the fixed side of the molding machine continues to mold-separate the lower mold 06, and the urentan rod fixed to the lower mold 06 leaves the middle plate. The second stage of mold opening is carried out by the stroke of tension bar B fixed to the lower mold.

Fig. 11 is a step of taking out the mold release product (finished product) of the second cavity 02, which is supported by the lower mold 06, and the compact plate which lifts out the mold-like ejection is lifted using the ejection means. As the plate rises, the extraction rod and the extraction block connecting the extraction take out the finished product. After the take-off is completed, all the connecting structure will recombine to the lower mold as the compact plate descends.

12 is a retraction step of the slide core 22, in which the finished product of the second cavity 02 is taken out and the rotation fixed to the middle plate 04 before rotating the product of the first cavity 01 to the second cavity forming space. It is a structure for releasing the core (03). The hydraulic cylinder 21 fixed to the middle plate 04 retracts the cylinder by hydraulic pressure, and the slide core 22 fixed to the cylinder retreats backward. At this time, it is configured to be out of the interlock 24 provided in the rotary core 03.

13 is a rotation step of the rotary core 03, the rotation angle is limited to 180 degrees to achieve a double injection structure. The bracket A including the servo motor 07 capable of controlling the acceleration / deceleration and the rotation angle to the middle plate 04 to form the double injection structure, and the gear A of the gear ratio with less gear ratio to the servo motor 07 for accurate rotation ( 08A) is connected, and gear B (08B) having a large gear ratio is connected to the middle plate 04 and the rotating shaft A (09A). The rotating shafts A and B 09A and 09 have a structure in which the rotating core 03 can rotate by binding to the rotating core 03. The servo motor 07 and the rotating core 03 perform a double injection operation by repeating the forward and reverse 180 degrees such as the reverse 180 degrees rotation after the rotation of the forward 180 degrees. The present invention may of course continue to rotate in one direction.

14 is a step of advancing the slide core 22 to rotate the product of the first cavity 01 to the second cavity forming space and then fix the rotating core 03.

FIG. 15 is a mold forming step, in which the lower mold 06 clamped to the fixed side template is moved to the middle plate 04 as the mold moving side template moves to the fixed side, and the lower mold 06 and the middle plate 04 are moved. Forming step with the upper mold (05), and finally the urethane rod fixed to the lower mold (06) is forced to press the middle plate (04), thereby forming a complete mold. Thereafter, the above process is repeated to perform double injection.

The present invention is a rotating core fixing structure formed to mold each of different mold release materials in one mold, it can be carried out for fixing a variety of rotating core or take-out core. Moreover, it can also implement and apply for the sagging prevention of the slide core 22 which has a shaped part.

01: first cavity 02: second cavity
03: Rotating Core 04: Medium Plate
05: upper mold 06: lower mold
07: Servo Motor 08A: Gear A
08B: Gear B 09A: Rotary Axis A
09B: rotation axis B 12A: gear A
12B: Gear B 13A: Shaft A
13B: axis of rotation B
21: hydraulic cylinder 22: slide core
23: slide core bush 24: interlock
24A: Locking Hole 25: Bracket

Claims (3)

An upper mold 05 having a main core plate forming part of the first cavity 01, a lower mold 06 having a main core plate forming part of the second cavity 02; A middle plate (04) separated from the upper mold (05) and the lower mold (06), joined and mold-separated to form a main cavity plate, and a rotating core (03) forming the first and second cavities (01 and 02), In the multi-injection mold consisting of a servo motor (07) and a rotating means for rotating the rotary core (03);
A hydraulic cylinder 21 fixed to the outer surface of the middle plate 04 by a bracket 25 to be installed and operated toward the rotating core 03;
And a slide core (22) configured to be connected to the cylinder of the hydraulic cylinder (21) to fix and axially rotate the rotary core (03) by accompanying forward and backward movements. The method of claim 1, further comprising:
It is fixed to the outer surface of the rotary core 03 is fixed to the rotary core 03 without flow in the middle plate 04 as the front end of the slide core 22 is inserted into the advance, the slide core 22 An interlock 24 having a locking hole 24A for freely positioning the rotary core 03 in the middle plate 04 as the front end portion thereof is retracted and separated;
It is provided on the middle plate (04) is further provided with a slide core bush 23 for wrapping and protecting the cylinder and the slide core 22 of the hydraulic cylinder 21, and at the same time more smoothly guides its forward and backward operations. Rotating core fixing structure of multi injection mold. 3. The method of claim 2,
The front end portion of the slide core 22 has an angle and tapered shape to facilitate insertion and separation, and the corresponding locking hole 24A of the interlock 24 is also formed to have an angle and taper corresponding thereto. Rotating core fixing structure of multi injection mold.

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