JP2013518745A - Stopper injection molding equipment - Google Patents

Abstract

Disclosed is a plug injection molding apparatus that can confirm the presence or absence of opening and accurately injection mold a high-grade screw-coupled plug in which a plug main body portion maintains a stable connection state with a fixing ring when opened. provide.
A stopper injection molding apparatus according to the present invention includes an upper disk having an upper molded portion that molds an upper portion of an outer shape of the stopper, and a pair of slider operation pins that are inclined on both sides of the upper molded portion. A pair of outer sliders that slide horizontally against each other by the slider operating pins on a stripper located on the lower side of the disc to form the lower part of the outer shape of the stopper, and a core unit that forms the inner shape of the stopper The core unit has a core body in which a pocket is recessed and formed in a corresponding portion for undercut processing of the plug hinge portion, and an undercut portion for forming the hinge portion of the plug is projected and recessed in the pocket. It is characterized by including an inner slider that can be installed.
[Selection] Figure 4

Description

  The present invention is provided with an inner slider for forming a concave groove on the hinge part of the plug so that it can be projected and retracted in the core body, so that it is possible to check whether the plug is opened or not, and the plug body part is stable with respect to the fixing ring when opened. The present invention relates to a plug injection molding apparatus capable of accurately injection-molding a high-grade screw-coupled stopper that keeps the connected state.

  In general, containers for storing liquid substances such as mineral water and milk, oils, paints, chemical products, etc. have a container body in which a mouth is formed and a stopper that opens and closes the mouth of the container body. Opening and closing of the stopper is roughly divided into a screw connection type and a one-touch type.

  In the screw-coupled stopper 130, as shown in FIGS. 1 and 2, when the threaded portion corresponding to the container body 110 in which the threaded portion is formed is formed on the inner peripheral surface, the stopper is completely separated from the container. Since there is a risk of contamination and loss, a fixing ring 133 is provided below the stopper body 131 so as to prevent the stopper body from being detached from the container body 110 so that the stopper remains connected to the container body even when the container 100 is opened. .

  The plug body 131 and the fixing ring 133 are connected by a plurality of radially formed bridges 135. When the plug is opened, the bridge is cut to leave an opening trace.

  However, in such a conventional technique, since the fixing ring 133 is coupled to the container body 110 so as to cause idling, the opened stopper main body 131 is idly rotated together with the fixing ring, and the contents The body of the plug is lowered by its own weight when it is discharged, and it is not only uncomfortable by being caught in the user's mouth or chin, but it is also obstructive and the contents become unclean, such as sticking to the plug. It was.

  On the other hand, as shown in FIG. 3, the one-touch type stopper 130A that is not a screw connection type has a fixing ring 133a fixed to the container body and a stopper body part 131a that is opened and closed connected by a hinge part 135a. Yes.

  The hinge portion is formed to have a thin step compared to the thickness of the plug main body portion 131a and the fixing ring 133a for opening and closing operation, and the width connecting the plug main body portion and the fixing ring is the plug main body when the plug is opened. Corresponding to the distance between the part and the fixing ring, the intermediate part of the hinge part is formed so as to increase toward both sides from the base point, so that the connection at the time of opening is stable.

  On the other hand, when the screw coupling type stopper is provided with a stable hinge portion like the one-touch type stopper, the stopper main body portion can be stable without being shaken when opened.

  However, the hinge part having such a configuration has a disadvantage that an undercut occurs due to a concave stepped jaw formed on the inner peripheral surface of the stopper.

  In the one-touch type stopper, the fixing ring 133a and the stopper main body 131a are injection-molded with the hinge part 135a interposed therebetween to solve the undercut problem of the hinge part. In this case, as described above, the bridge for confirming the presence of opening must be integrally formed between the fixing ring and the stopper main body, so that the fixing ring and the stopper main body are coupled to the container main body. There is a problem that the injection must be performed in such a state that it is arranged in the vertical direction, and it is impossible to inject with the plug body portion and the fixing ring expanded.

  In other words, in the case of a conventional screw-coupled stopper having a bridge, due to technical limitations with respect to the undercut processing, a stable connection and a hinge portion that does not shake the stopper main body when opened are provided like a one-touch stopper. There was a problem that was not possible.

  The present invention has been devised to solve the above problems, and an object of the present invention is to provide an inner slider for molding a hinge portion of a plug in which a stepped groove is formed on the inner side. By being able to be equipped, it is equipped with a bridge for confirming whether the plug is opened or not, and furthermore, a high-grade screw-coupled plug that has a recessed groove on the hinge part and that maintains the stable connection state of the plug body when opened is accurately To provide a plug injection molding apparatus capable of injection molding.

  Another object of the present invention is that the core body is formed so as to be separable into an upper lump and a lower lump on the basis of the support wing forming part of the plug, and the support wing is smoothly detached to reduce the occurrence of defects and The present invention is to provide a plug injection molding apparatus that can remarkably improve the quality of the plugs on display.

  The stopper injection molding apparatus according to the present invention that achieves the above-mentioned object is an upper disk provided with an upper molding portion that molds the upper portion of the outer shape of the stopper and a pair of slider operation pins that are formed on both sides of the upper molding portion, A pair of outer sliders that are horizontally slid opposite to each other by the slider operating pin on the stripper located on the lower side of the upper disc, and that form a lower part of the stopper external shape, and a core unit that forms the internal shape of the stopper; The core unit includes a core body in which a pocket is recessed and formed in a corresponding portion for undercut processing of the plug hinge portion, and an undercut portion for forming the hinge portion of the plug is the pocket. It is characterized by including an inner slider that is installed so as to be able to appear and disappear.

  In one embodiment according to the present invention, the core body is formed to be separable into an upper lump and a lower lump on the basis of a support wing forming part where a support wing of a plug is formed, and the upper lump and the lower lump are screwed The head is located in the lower internal space of the lower mass and is connected by a connecting screw that passes through the lower mass and is screwed to the upper mass, and a coil spring is installed between the lower mass and the screw head of the connecting screw. It is characterized by being.

  According to the plug injection molding apparatus of the present invention, the inner slider for forming the concave groove of the hinge portion of the plug is provided in the core body so as to be able to protrude and retract, so that the opening of the plug between the plug main body portion of the plug and the fixing ring can be performed. With a bridge for confirming the presence or absence and the ability to accurately injection-mold a screw-coupled stopper with a groove in the hinge part, the stopper main body is in a stable open state with respect to the fixing ring when opened as well as a function to confirm the presence or absence of opening There is a remarkable effect of embodying the production of high-quality stoppers that hold

In addition, the core body is separated into the upper lump and the lower lump based on the support wing molding part of the plug, so that the support wing can be removed smoothly, reducing the occurrence of defects, and the quality of the plug of the injection product There is an advantage that can be remarkably improved.

It is a block diagram of the screw | thread coupling-type stopper of a prior art. FIG. 2 is a variable state diagram of FIG. 1. It is a perspective view of the open state of a one-touch type stopper. It is a top view of the stopper injection molding device of one embodiment concerning the present invention. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. FIG. 7 is a variable state diagram of FIG. 6. It is an extract top view of the outside slider of one embodiment concerning the present invention. FIG. 5 is a partially omitted cross-sectional view taken along line CC in FIG. 4. It is the variable state diagram 1 of FIG. FIG. 10 is a second variable state diagram of FIG. 9. It is a disassembled perspective view of the core of one Embodiment which concerns on this invention. It is a perspective view of the stopper of one embodiment shape | molded by this invention. It is a perspective view of the bottom face of FIG. FIG. 14 is a perspective view of one use state of FIG. 13.

  Hereinafter, embodiments of the plug injection molding apparatus of the present invention will be described in more detail with reference to the accompanying drawings.

  As shown in FIGS. 4 to 12, the stopper injection molding apparatus 200 according to an embodiment of the present invention is formed with an upper molding portion 231 that molds the upper portion of the outer shape of the stopper, and inclined on both sides of the upper molding portion. An upper disk 230 having a pair of slider operation pins 233 and 234, and a slider slidably horizontally slid on the stripper 260 positioned below the upper disk 230 so that the lower part of the outer shape of the stopper is formed. It includes a pair of outer sliders 241 and 243 to be molded, and a core unit 250 for molding the internal shape of the stopper.

  The core unit 250 has a core body 251 in which a pocket 2511 is recessed and formed in a corresponding portion for undercut processing of the plug hinge portion, and an undercut portion 2533 for molding the hinge portion of the plug in and out of the pocket 2511. An inner slider 253 that can be installed is included.

  Here, the inner slider 253 has an undercut portion 2533 protruding on one upper side, an insertion portion 2531 located inside the pocket, and extends from the insertion portion 2531 to the outside of the pocket and slides horizontally on the lower disc 270. A support portion 2536 in which a wedge hole 2537 is formed is integrally formed (see FIGS. 9 and 12), and is provided with an elastic member 255 that is installed at the rear of the inner slider 253 and presses the inner slider inside the pocket. The upper disc 230 is preferably provided with a wedge 235 that is inserted into and removed from the wedge hole 2537 of the inner slider 253.

  The inner slider 253 is formed with a concave groove (a) (see FIG. 15) of the hinge portion 35 of the insertion portion 2531 protruding outward during the injection molding of the insertion portion 2531. It is configured not to immerse inside the pocket 2511 of the core body and interfere with the removal of the stopper.

  The undercut portion 2533 of the inner slider may be variously formed according to the shape of the concave groove of the hinge portion of the stopper.

  In addition, the wedge 235 is formed in an upper, lower, and lower quadrangular pyramid shape, the wedge hole 2537 is formed through the upper, lower, and narrow square hole corresponding to the wedge 235, and an inner slider support portion 2536 is formed. The sliding lower disk 270 is preferably formed with a wedge fixing groove 271 for inserting and fixing the tip of the wedge 235 when the wedge is fastened to the inner slider.

  As described above, the wedge 235 and the wedge hole 271 are formed in an upper, lower, and narrow shape, so that the insertion of the wedge is guided, and the wedge fixing groove 271 is formed in the lower disc 270 so that the inner slider can be moved during injection molding. Firmly located.

  For the horizontal slide of the inner slider 253, the support 2536 and the lower disk 270 are formed with corresponding guides.

  In one embodiment according to the present invention, as shown in FIGS. 9 and 12, the core body 251 has an upper lump 251a based on a support wing forming portion 2515 in which a support wing 34 (see FIG. 14) of a plug is formed. The upper chunk 251a and the lower chunk 251b are screw-coupled to the upper chunk 251b through the lower chunk 251a, with screw heads located in the lower inner space 2514 of the lower chunk. Preferably, a coil spring 2517 is installed between the lower mass 251b and the screw head of the connection screw 2516.

  In order to release the support wing 34, the coil spring 2517 is designed to be gradually restored.

  Further, as shown in FIG. 8, the outer sliders 241 and 243 are formed so as to bisect the lower part of the outer shape of the stopper, and a guide corresponding to the stripper for horizontal movement on the stripper 260 is formed. The

  The operation state of the plug injection molding apparatus 200 according to the present invention having such a configuration will be described.

  As shown in FIGS. 6 and 9, the state in which the resin melt is injected is set such that the upper disk 230 and the pair of outer sliders 241 and 243 are shaped so as to shape the outer shape of the plug, while the core unit 250. The inner slider 253 has an undercut portion 2533 of an insertion portion 2531 located in a pocket 2511 formed in the core body 251 so as to protrude from the outer peripheral edge of the core unit 250 so as to form a concave groove of the stopper.

  The inner slider 253 holds the position firmly against the pressure generated when the resin melt is injected by fixing the support portion 2531 with the wedge 235 fixedly installed on the upper disk.

  At this time, the upper lump 251 a and the lower lump 251 b formed by separating the core body 251 are in close contact with each other by the elastic force of the connection screw 2516 and the coil spring 2517.

  Then, in the step of removing the plug through the resin melt injection and curing stages, as shown in FIGS. 7 and 10, the slider operating pins 233, 234 fixed to the upper disk while the upper disk 230 is raised, and The wedge 235 is raised.

  The rising of the slider operating pins 233 and 234 formed to be inclined causes the pair of outer sliders 241 and 243 to spread on both sides, and at the same time causes the wedge 235 to be detached from the wedge hole 2537 of the inner slider support portion.

  Then, the inner slider 253 from which the wedge has come out is pushed inside the pocket 2511 of the core body by the elastic member 255 installed at the rear, and the undercut portion 2533 of the insertion portion enters the inside of the pocket 2511. , It will not interfere with the removal of the molded stopper.

  Further, the core body 251 separately formed into the upper chunk 251a and the lower chunk 251b is caught by the support wing 34 formed on the stopper 30 when the ejector 280 raises the stripper 260 for removing the stopper. Then, together with the plug 30 of the projectile, it is instantaneously lifted from the lower mass 251b, the upper mass 251a and the lower mass 251b are separated from each other, and the plug support wing 34 (see FIG. 14) is smoothly separated through this gap. .

  When the upper lump 251a is raised, the connecting screw 2516, which is screwed together, rises together with the upper lump, and the rising interval is designed to be about 5 mm.

  Thereafter, the coil spring 2517 installed between the screw head of the connection screw 2516 and the lower mass 251b causes the connection screw 2516 that has been lifted together with the upper mass to return to its original position, while the upper mass 251a and the lower mass 251b. The stripper 260, which comes into contact again and continuously rises separately, pushes up the plug 30 and the plug is taken out.

  On the other hand, the screw portion 311 (see FIGS. 14 and 15) of the plug may be deformed by being forcibly removed by the stripper, but the entire inner peripheral surface of the plug is hardened and has flexibility. Since the pressure is evenly received at the periphery, the shape of the thread portion is formed.

  After removing the stopper, the eject 280 and the stripper 260 are returned to their original positions in the reverse order, and the slider operating pins 233 and 234 and the wedge 235 are lowered while the upper disk 230 is lowered, and the slider operating pin is lowered. The outer sliders 241 and 243 face each other and return while moving horizontally, and the wedge 235 descends and the inner slider 253 is fixed to the outer peripheral edge of the core unit 250 so that the undercut portion 2533 protrudes. Prepare for injection.

  At this time, the wedge 235 and the wedge hole 2537 are formed in an upper, lower, and narrow shape, so that the inner slider 253 is moved while the wedge 235 is inserted into the wedge hole 2537 to secure the position.

  The packaging container stopper 30 according to an embodiment manufactured according to the present invention will be described. As shown in FIGS. 13 to 15, the fixing ring 33 that prevents the container main body 10 from being detached and the idling is prevented, and the container main body 10 is opened and closed. The plug body 31 having a threaded portion 311 formed on the inner peripheral surface, the hinge 35 connecting the fixing ring 33 and the plug body 31, and the plug body 31 and the fixing ring 33 are formed. A plurality of bridges 39 that are cut when the stopper is opened are provided.

  The fixing ring 33 is formed with an incision line 37 for extending the connection length with respect to the plug body 31 in the set section of the periphery of the fixing ring 33 with the lower side of the hinge 35 as a center. A concave groove (a) formed by the inner slider of the plug injection molding device is formed on the inner side of the plug main body 31 and the fixing ring 33 so as to be stepped from the meat of the plug main body 31 and the fixing ring 33.

  The opening operation of the plug is caused by the shape of the concave groove (a) of the hinge portion 35 and the flesh and step jaws of the plug main body 31 and the fixing ring 33 being accurately formed, so that the moment of warping the plug main body 31 is generated. Cause it to occur.

  Thus, the concave groove (a) in which the step jaw is accurately formed is formed by the plug injection molding apparatus 200 of the present invention including the inner slider 253 with an undercut portion at the time of injection molding.

  The plug injection molding apparatus according to the present invention is provided with the inner slider 253 for forming the hinge groove in the plug as described above so as to be able to protrude and retract in the core body 251, so that the plug body 31 and the fixing ring of the plug 33 is provided with a bridge 39 (see FIGS. 14 and 15) for confirming whether or not the seal is opened, and a screw-coupled stopper provided with a recessed groove hinge portion 35 can be injection-molded in an accurate form. .

  Further, in the core unit 250, the core main body 251 is separated and formed into an upper lump 251a and a lower lump 251b with reference to the plug support wing molding portion, so that the plug support wing 34 (see FIG. 14) can be smoothly detached. As a result, the occurrence of defective deformation is minimized and the quality of the stopper of the injection product is remarkably improved.

  The present invention described above is not limited by the above-described embodiment and attached drawings, and various substitutions, modifications, and changes can be made without departing from the technical idea of the present invention. It will be obvious to those with ordinary knowledge in the field.

30 plug 31 plug body 311 screw 33 fixing ring 35 hinge 37 cutting line 39 bridge 200 injection molding apparatus 230 upper disk 231 upper molding 233, 234 slider operation pin 235 wedge 241, 243 outer slider 250 core Unit 251 Main body 251a Upper block 251b Lower block 2511 Pocket 2516 Connection screw 2517 Coil spring 253 Inner slider 2531 Insertion section 2533 Undercut section 2536 Support section 2537 Wedge hole 255 Elastic member 260 Stripper 270 Lower disk 271 Wedge fixing groove

Claims (4)

An upper disk 230 provided with an upper molding part 231 for molding the upper part of the stopper outer shape and a pair of slider operation pins 233 and 234 formed on both sides of the upper molding part;
A pair of outer sliders 241 and 243 for horizontally sliding on the stripper 260 located on the lower side of the upper disc 230 and facing each other by the slider operating pin to form a lower part of the outer shape of the stopper;
A core unit 250 for forming the internal shape of the stopper,
The core unit 250 has a core body 251 in which a pocket 2511 is recessed and formed in a corresponding portion for undercut processing of the plug hinge portion, and an undercut portion 2533 for molding the hinge portion of the plug in and out of the pocket 2511. A stopper injection molding apparatus comprising an inner slider 253 that can be installed. The inner slider 253 has an undercut portion 2533 protruding on one upper side, an insertion portion 2531 located inside the pocket, and extends from the insertion portion 2531 to the outside of the pocket and slides horizontally on the lower disk 270 to provide a wedge. A support portion 2536 in which a hole 2537 is formed is integrally formed,
An elastic member 255 is provided at the back of the inner slider 253 and presses the inner slider inside the pocket.
The stopper injection molding apparatus according to claim 1, wherein the upper disc (230) is provided with a wedge (235) that is inserted into and removed from a wedge hole (2537) of the inner slider (253). The wedge 235 is formed in an upper, lower, and lower quadrangular pyramid shape
The wedge hole 2537 is formed through a rectangular hole that is wide and narrow corresponding to the wedge,
The lower disk 270 on which the support portion 2536 of the inner slider is slid is formed with a wedge fixing groove 271 for inserting and fixing the tip of the wedge 235 when the wedge is fastened to the inner slider. Item 3. A stopper injection molding apparatus according to Item 2. The core body 251 is formed to be separable into an upper lump 251a and a lower lump 251b on the basis of a support wing forming part 2515 where a support wing of a plug is formed,
The upper chunk 251a and the lower chunk 251b are connected by a connecting screw 2516 having a screw head located in the lower inner space 2514 of the lower chunk and screwed to the upper chunk 251b through the lower chunk 251a. The plug injection molding apparatus according to claim 1, wherein a coil spring 2517 is installed between the screw head and the screw head of the connection screw 2516.

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