KR20070041115A - Multiple injection molding method and apparatus - Google Patents

Abstract

The present invention relates to a multi-injection molding method and a mold apparatus thereof, and in particular, a pair of upper and lower molds by simultaneously installing several pairs of upper and lower molds at predetermined angles on the same horizontal plane about the central axis of each other and angular displacement of the lower molds The present invention relates to a multi-injection molding method and a mold apparatus, which allow injection molding to be performed while changing the order sequentially.

According to the present invention, when designing a mold for multi-injection, one mold of a pair of molds is utilized as it is, and the other one is designed for multi-injection purposes, and is fixed on the same horizontal plane about the central axis of the center. Multiple injections are installed at the same time so that the upper and lower mold pairs face each other, and the movable mold located at the lower part is angularly displaced to sequentially change the pair of the fixed and movable molds located at the upper and lower parts. It allows molding to be carried out so that multiple injection moldings can be made sequentially without being separated from the lower mold up to the intermediate or final position. It is characterized by the possibility.

Multi, injection, molding, mold

Description

 Multiple Injection Molding Method and Apparatus thereof

1 is a longitudinal sectional view showing main parts for explaining the concept of the present invention;

2 is a longitudinal cross-sectional view as seen from another direction of FIG.

3 is a cross-sectional view taken along the line A-A of FIG.

<Explanation of symbols for the main parts of the drawings>

1: fixed side disc, 3: movable side disc,

5: ejector mechanism, 7: lifting plate,

9: angular rotating mechanism, 10a, 10b: fixed side mold,

20a, 20b: manifold, 30a, 30b: movable mold

32: central axis, 34,38: support plate,

36: slider shaft, 50: hydraulic cylinder,

52: piston rod, 54: eject pin,

56: eject plate, 72: guide rod,

90: drive motor, 92: drive pulley,

94: driven pulley, 96: tie-mil belt

The present invention relates to a multi-injection molding method and a mold apparatus thereof, and in particular, a plurality of upper and lower molds are simultaneously installed so as to face each other at predetermined angles on the same horizontal plane about the central axis of the center, and the lower mold is angularly shifted to The present invention relates to a multi-injection molding method and a mold apparatus for allowing injection molding to be performed while sequentially changing a pair of lower molds.

In general, the conventional multi-injection method uses a pair of upper and lower molds to perform first injection molding, and then the second upper and lower molds which are taken out as a first intermediate product and separately prepared for secondary injection molding. The primary intermediate product is placed inside the second injection molding again, and the method of performing multiple injection molding in the above repetitive manner is the main dominant.

However, this method requires a relatively large amount of time to open and close the mold and to position the intermediate product, because the intermediate product must be taken out and moved to the next mold continuously at each stage of injection molding. This reduces the productivity and makes it difficult for the intermediate product to be located in the correct position, and the deformation occurs during the work of performing the multi-injection work or the process of positioning the intermediate product. It is becoming.

For example, in the case of the "mould structure for multi-injection molding" of Korean Patent No. 365148, which is the applicant's first invention, the above-mentioned conventional problem is solved to some extent, but the slide movement method is adopted to improve the automation or operating efficiency. Aside from being able to improve to some extent, there are disadvantages that cannot completely solve the fundamental problems of the prior art.

The present invention has been made in order to solve the above conventional problems, the research and development, has the following object.

The main purpose of the present invention is to design one mold of a pair of molds as it is in the design of the mold for multi-injection and to design the other mold for the purpose of multi-injection, it is constant on the same horizontal plane around the central axis of the center Multiple injections are installed at the same time so that the upper and lower mold pairs face each other, and the movable mold located at the lower part is angularly displaced to sequentially change the pair of the fixed and movable molds located at the upper and lower parts. It allows molding to be carried out so that multiple injection moldings can be made sequentially without being separated from the lower mold up to the intermediate or final position. To make it possible.

Another object of the present invention is a preparation process for multiple injections, except for the injection operation in the form of the intermediate product to the adjacent position in the form of the displacement of the lower mold in the manner of displacement, angular displacement by the center rotation in place It is intended to improve productivity by shortening the displacement time by performing the operation by making the accurate transfer and preparation work to shorten the overall working time compared to the conventional.

In order to achieve the above object, the present invention utilizes one mold of a pair of molds as it is while designing a mold for multi-injection and designs the other mold for multi-injection purposes, centering on the central axis of the center. Simultaneously install a pair of molds at each angle on the same horizontal plane to face each other, and the molds located on one side of them are fixedly positioned and the molds located on the other side of the molds are held in place about the central axis of the center. Installing and configuring the angle rotation is possible; Allowing the first injection molding to be performed while the first pair of molds are paired with each other; In a state in which a pair of molds are separated from each other, and an intermediate injection molded product is fixedly positioned in one of the molds, the paired molds are coupled to another adjacent mold by an angular rotational displacement including the corresponding mold. It provides a multi-injection molding method characterized in that the multi-injection molding is performed sequentially by the step of making the injection molding of.

In addition, in order to perform the above injection molding method, a fixed side mold includes a manifold and a fixed side mold for supplying resin to the inside of the mold, and a movable side mold is located on the movable side disk, and the fixed side mold and the movable side. An injection molding is performed in a state in which the molds are coupled to each other, and the injection-molded product can be discharged while the fixed side mold and the movable side mold are separated from each other. The mold and the movable mold are arranged so that a plurality of molds are located at predetermined angles so as to face each other, and a center axis is formed at the central position of the movable mold so as to be rotatable in place as the inner side of the movable side disc and the support plate. A slide for transmitting a rotational driving force to a lower portion of the central shaft A shaft is fixedly installed, an ejection mechanism is installed at one side of the movable side mold, a lifting plate is installed below the slide shaft, and an angular rotation mechanism is provided at each of the slide shafts.

In addition, the ejection mechanism is fixed to the hydraulic cylinder is installed on the support plate and an ejector plate is installed on the upper part of the reciprocating piston rod of the hydraulic cylinder is installed, the ejector pin is moved from the mold on the movable side in accordance with the reciprocating of the piston rod, Provided is a multi-injection molding apparatus in which the construction is performed such that reverse operation is performed to extract the molded product.

In addition, the elevating plate is a slide rod, the central shaft and the assembly of the movable side coupled to each other by a guide rod fixedly installed on the support plate so that the lifting and lowering operation is performed by a separate ejector installed in the existing injection device There is provided a multi-injection molding apparatus in which the configuration is made.

In addition, the angular rotation mechanism is installed between the drive pulley of the drive motor fixedly installed on one side of the support plate and the slide shaft formed in the form of a spline shaft, the timing between the driven pulley installed to rotate in place even if the slide shaft is raised or lowered. Provided is a multi-injection molding apparatus in which a belt is connected and installed.

Next, the configuration of the present invention made as described above will be described in detail with reference to the accompanying drawings.

As shown, according to the preferred embodiment of the present invention, the manifolds 20a and 20b and the fixed side molds 10a and 10b for supplying resin into the mold are located in the fixed side disc 1 in common. Movable side molds 30a and 30b are positioned on the movable side disc 3 and injection molding is performed while the stationary side molds 10a and 10b and the movable side molds 30a and 30b are coupled to each other. The side molds 10a and 10b and the movable side molds 30a and 30b may be discharged from the injection molded product while being separated from each other.

At this time, the stationary side molds 10a and 10b and the movable side molds 30a and 30b are arranged so that a plurality of the molds are positioned at predetermined angles so as to face each other, and the movable side molds 30a and 30b are disposed. A central shaft 32 is erected at a central position of the movable side disc 3 and a support plate 34 so as to be rotatable in place, and a lower portion of the central shaft 32 is configured to transmit a rotation driving force. 36 is fixedly installed, an ejection mechanism 5 is installed at one side of the movable side molds 30a and 30b, and a lifting plate 7 is installed below the slide shaft 36, and the slide shaft ( 36, the angular rotation mechanism 9 is installed.

At this time, the ejection mechanism 5 is fixed to the support plate 34, the hydraulic cylinder 50 is installed and the ejection plate (54) in which a plurality of eject pins 54 are installed on the reciprocating piston rod 52 of the hydraulic cylinder 50 ( 56 is installed so that the eject pin 54 is moved forward and backward from the movable side molds 30a and 30b as the piston rod 52 reciprocates so that the configuration of the ejected product may be performed. do.

In addition, the elevating plate 7 is fixed to the slide shaft 36 which is coupled to each other, the central shaft 32 fixed to the upper portion of the slide shaft 36, and the upper portion of the central shaft 32 With the assembly of the movable molds (30a, 30b) with the assembly of the guide rod 72 fixed to the support plate 38, the configuration is made so that the lifting and lowering operation is performed by a separate ejector installed in the existing injection apparatus You lose.

In addition, the angular rotation mechanism 9 is fitted to the drive pulley 92 of the drive motor 90 fixedly installed on one side of the support plate 34 and the slide shaft 36 formed in the form of a spline shaft, the slide shaft 36 ) Is made up by connecting the timing belt 96 between the pulley 94 and the driven pulley 94 which can be rotated in place.

Reference numeral 58 as a reference numeral denotes a hydraulic line for the hydraulic cylinder 50.

Next, a process in which the operation of the present invention device made as described above will be described based on the present invention's multiple injection molding method.

That is, when designing a mold for multi-injection, one mold of a pair of molds is used as it is, and the other one is designed for multi-injection purpose, but is designed on the same horizontal plane about the central axis 32 of the center. At a certain angle, a pair of molds (10a, 10b) (30a, 30b) are installed at the same time to face each other and the mold (10a, 10b) which is located on either side of the fixed position and the other side of the The molds (30a, 30b) is a step of installing and configuring the angle rotation in place about the central axis 32 of the center; Allowing the first injection molding to be performed in a state where the first pair of molds (10a, 10b) (30a, 30b) are paired with each other; Then, the pair of molds 10a and 10b are separated from each other and the molds 10a and 10b are removed in a state where an intermediate injection molded product is fixedly positioned in one of the molds 30a and 30b. Including a plurality of injection molding is performed through the steps to make the next injection molding in a state of being coupled to form a pair with the other adjacent molds (30b, 30a) by the angular rotation displacement.

Divided into more detail step by step look in detail as follows.

Since the steps of configuring the mold apparatus have already been described in detail in the description of the above-described configuration, the steps of injection molding will be described separately without separately explaining.

First, in the first injection step, the fixed mold 10a and the movable mold 10a and 10b and the movable mold 30a and 30b are coupled to each other through the manifold 20a. 30a) is supplied to the side combined with each other for injection molding resin and injection molding is made.

Next, in order to change the positions of the movable side molds 30a and 30b in the next injection process, the fixed side molds 10a and 10b and the movable side molds 30a and 30b are first separated by an injection molding apparatus. When the lifting plate 7 is advanced in the separated and spaced apart state, the assembly of the movable side molds 30a and 30b, the central shaft 32, the slider shaft 36, and the lifting plate 7 is advanced together, and the movable side mold ( The angular rotation mechanism 9 is driven and driven in a state where 30a and 30b are separated from the movable side disc 3 and the movable side molds 30a and 30b are lifted up and thus positioned horizontally in place. As the driving pulley 92, the timing belt 96, and the driven pulley 94 of the motor 90 are rotated angularly, the slider shaft 36, which is coupled to the driven pulley 94 and in the form of a spline shaft, is angled. Rotation, for example 180 degrees, to position the movable molds 30a and 30b. After switching to the position of the movable side molds 30b and 30a, the elevating plate 7 is lowered again to position the movable side molds 30b and 30a at the internal positions of the movable side disc 3, and the fixed side After the molds 10a and 10b and the movable side molds 30b and 30a are formed to be paired with each other, the molds 10a and 30b are respectively passed through the manifolds 20a and 20b. ) Injection molding is performed by supplying a resin for injection molding. That is, the first injection molding is performed on the molds 10a and 30b, and the injection molding is performed on the molds 10b and 30a in a state in which the injection molding is first performed on the molds 10b and 30a. do.

Next, after the mold separation of the molds 10a and 10b and 30b and 30a is performed, the ejection mechanism 5 is operated so that the piston rod 52 of the hydraulic cylinder 50 is advanced to eject the eject plate 56. When the pin 54 is advanced, the molded product made of the multi-injection molding is extracted and discharged from the inside of the mold 30a, and the piston rod 52 of the ejection mechanism 5 is moved back to its original position and the advancement of the elevating plate 7 is performed. The movable side mold 30a displaced by the forward arrangement of the movable side molds 30b and 30a from the movable side disc 3 by the angular rotation of the movable side molds 30b and 30a by the angular rotating mechanism 9 30b), the reverse position of the movable side molds 30a, 30b by the reverse of the elevating plate 7, the mold coupling and the manifold of the fixed side molds 10a, 10b and the movable side molds 30a, 30b. Primary injection molding of the pair of molds 10a, 30a by the folds 20a, 20b and multiple injection molding of the remaining pair of molds 10b, 30b. The output molding will be written.

Thus, repeated injection molding is performed as described above, the molded product made of multiple injection molding is discharged to the outside by the ejection mechanism (5), the intermediate product made of the first injection molding the angle displacement, the position where the second injection molding is made, The multi-injection operation by the first injection molding and the second injection molding is simultaneously performed for each pair of molds, and the discharge of the finished product by the ejection mechanism 5 is repeatedly performed.

As described above, according to the multi-injection molding method and the molding apparatus according to the present invention, when designing a mold for multi-injection, one mold of a pair of molds is utilized as it is and the other mold is used for multi-injection purposes. Designed to fit each other, so as to face each other a pair of fixed and movable mold (10a, 10b) (30a, 30b) located in the upper and lower parts at a predetermined angle on the same horizontal plane about the central axis 32 of the center Among them, multiple injection molding is performed while angularly displacing the movable side molds 30a and 30b to sequentially change pairs of the fixed side and movable side molds 10a and 10b and 30a and 30b located at the upper and lower sides. To allow multiple injection moldings to be carried out in sequence without being separated from the lower mold up to the intermediate or final position, causing deformation or product defects to occur To prevent in advance it is possible that the accurate quality maintained.

In addition, the present invention is a preparatory process for the multi-injection except for the injection operation, as a built-in form of the intermediate product to the adjacent position in the form of displacing the lower movable side mold (30a, 30b) in a way of lifting, lowering and in place The operation is performed by the angular displacement by the center rotation, and the displacement time is shortened while the accurate transfer and preparation work is made, thereby reducing the overall work time compared to the conventional one, thereby improving the productivity.

Claims (5)

The fixed side disc 1 has manifolds 20a and 20b and the fixed side dies 10a and 10b for supplying resin into the mold, and the movable side disc 3 has movable side dies 30a and 30b. And injection molding is performed while the fixed side molds 10a and 10b and the movable side molds 30a and 30b are coupled to each other and the fixed side molds 10a and 10b and the movable side molds 30a and 30b. In the apparatus in which the injection molding of the product is made by discharging the injection-molded product in a state that is separated from each other, The fixed side molds 10a and 10b and the movable side molds 30a and 30b are arranged in a plurality of positions at predetermined angles so as to face each other and correspond to each other. In the center position of the movable side molds 30a and 30b, a central shaft 32 is erected so as to be rotatable in place as the inner side of the movable side disc 3 and the support plate 34, The lower portion of the central shaft 32 is fixed to the slide shaft 36 for transmitting the rotational driving force, An ejection mechanism 5 is installed at one side of the movable side molds 30a and 30b, A lifting plate (7) is installed below the slide shaft (36), and the angular rotation mechanism (9) is installed on the slide shaft (36), characterized in that the multiple injection molding apparatus. The method of claim 1, The ejection mechanism (5) is an ejection plate (56) having a plurality of eject pins (54) fixedly installed on a support plate (34) and having a plurality of eject pins (54) installed on the reciprocating piston rod (52) of the hydraulic cylinder (50). It is installed so that the eject pin 54 is moved forward and backward from the movable mold (30a, 30b) in accordance with the reciprocation of the piston rod 52 is configured so that the extraction operation of the molded product is made Multi injection molding machine. The method of claim 1, The elevating plate 7 is a slide shaft 36 which is coupled to each other, a central shaft 32 fixed to the upper portion of the slide shaft 36, and the movable side fixed to the upper portion of the central shaft 32 Multi-injection molding apparatus, characterized in that the configuration is made to ride up and down the guide rod 72 is fixed to the support plate (38) with the assembly of the mold (30a, 30b). The method of claim 1, The angular rotation mechanism 9 is fitted to the drive shaft pulley 92 of the drive motor 90 fixed to one side of the support plate 34 and the slide shaft 36 formed in the form of a spline shaft so that the slide shaft 36 is Multiple injection molding mold apparatus, characterized in that the timing belt 96 is connected between the driven pulley (94) installed to be able to rotate in place even if rising or falling. When designing a mold for multi-injection, one mold of a pair of molds is used as it is and the other one is designed for multi-injection purpose, but a predetermined angle is formed on the same horizontal plane about the central axis 32 of the center. A pair of molds 10a, 10b (30a, 30b) are installed at the same time so as to face each other and molds 10a, 10b positioned on either side of the mold are fixedly positioned and positioned on the other side thereof. (30a, 30b) is installed and configured to enable angular rotation in place about the central axis 32 of the center; Allowing the first injection molding to be performed in a state where the first pair of molds (10a, 10b) (30a, 30b) are paired with each other; And The pair of molds 10a and 10b are separated from each other and the molds 10a and 10b are included in a state in which an intermediate injection molded product is fixedly positioned in one of the molds 30a and 30b. Multi-injection molding, characterized in that the multi-injection molding is carried out sequentially through the step of performing the next injection molding in a state in which it is coupled to form a pair with other adjacent molds (30b, 30a) by the angular rotation displacement Way.

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