Injection molding device for inserting an atypical stiffener

Abstract

Injection molding device for inserting an atypical stiffener (B), comprising an upper mold (M1) provided with an upper core (C1) and a lower mold (M2) provided with a lower core (C2) to produce an injection molded product (S) by receiving resin melt and curing in a state in which the atypical stiffener (B), the width of which is not constant, is inserted, wherein the injection molding device comprises: an elastic clamping device (T) supported by the lower mold (M2), embedded in the lower core (C2), engaging with a width of the atypical stiffener (B) and elastically compressing a first side and a second side of the atypical stiffener (B) to hold the atypical stiffener (B), which is to be inserted by the elastic clamping device (T) into a predetermined position between the upper core (C1) and the lower core (C2) when the resin melt is introduced;wherein the elastic clamping device (T) comprises an elastic clamp (T1) on a first side which elastically presses the first side of the atypical stiffener (B), and an elastic clamp (T2) on a second side which elastically presses the second side of the atypical stiffener (B) in order to elastically press the atypical stiffener (B) between the elastic clamp (T1) on the first side and the elastic clamp (T2) on the second side; wherein the elastic clamp (T1) on the first side and the elastic clamp (T2) on the second side each comprise: a vertical support (50) which is mounted and placed on the lower casting mold (M2);and a horizontal elastic bundle (60) mounted on an upper end section of the vertical support (50) and embedded in the lower core (C2) to elastically compress the first side and the second side of the atypical stiffening (B) between the first side of the elastic stiffening and the second side of the elastic stiffening;wherein each vertical support (50) of the elastic clamp (T1) on the first side and of the elastic clamp (T2) on the second side is positioned such that they are inclined from a lower end section of the lower mold (M2) to an upper end section of the lower mold (M2), such that the horizontal elastic bundle (60) of the elastic clamp (T1) on the first side and the horizontal elastic bundle (60) of the elastic clamp (T2) on the second side are formed to elastically compress the atypical stiffening (B) by the elastic clamp (T1) on the first side and the elastic clamp (T2) on the second side at upper wide and lower narrow intervals, while the horizontal elastic bundle (60) of the elastic clamp (T1) on the first side and the horizontal elastic bundle (60) of the elastic clamp (T2) on the second side are located in the lower core (C2);and wherein the elastic clamping device (T) further comprises a tilting holder (70) which is connected to a central end section of the lower mold (M1) and comprises tilting holes (71) which are obliquely shaped at a predetermined angle such that the tilting holes (71) are close to each other at their lower sections and far apart at their upper sections.

Description

Background of the inventionField of the invention

[0001] The present invention relates to an injection molding apparatus for inserting an atypical stiffener. More particularly, the present invention relates to an injection molding apparatus for inserting an atypical stiffener, in which the atypical stiffener B is elastically compressed on both sides in conjunction with the width of an atypical stiffener B to hold it in position between an upper core and a lower core. State of the art

[0002] In general, injection molding refers to the production of an injection-molded product having a desired shape or form by injecting a molten synthetic resin melt mixed with a thermoplastic resin, a thermoformable resin, a binder, or the like into a mold and curing it therein, wherein the injection-molded product is applicable to various fields ranging from household appliances to smartphones, various building materials, and vehicle parts.

[0003] When the injection-molded product manufactured by injection molding a synthetic resin material requires high strength, for example, to withstand impact, then it is manufactured by using a stiffener.

[0004] An example of an injection-molded product incorporating such a stiffener may be a bumper beam used as a vehicle part.

[0005] Fig. 1A is an exploded perspective view showing a configuration of a conventional vehicle bumper assembly introduced in the prior art, and Fig. 1B is a perspective view showing a plastic composite bumper beam for a vehicle according to the prior art.

[0006] A typical prior art bumper assembly may include a bumper cover 10 covering the entire front and rear of the vehicle body, as shown in Fig. 1A, and an energy absorber 20 to absorb the inertia and impact energy of the bumper cover 10 , a bumper support 30 , which is behind the energy absorber 20 positioned to protect the vehicle body from impact and an anchorage 40 for fastening and anchoring the bumper support 30 on the vehicle.

[0007] This is reinforced when a stiffening 35 is inserted, the bumper support 30 the force that can withstand an external impact, protecting the vehicle body and ensuring the safety of its occupants.

[0008] Accordingly, the vehicle bumper beam made of plastic composite material according to the prior art document may comprise a body of a bumper beam 30 made of a fiber-reinforced plastic composite material and which is integrated into the body of the bumper support 30 used stiffening 35 include, whereby the stiffening used 35 along the longitudinal direction of the body of the bumper beam 30 with a loop shape according to Fig. 1B is arranged.

[0009] The stiffening 35may be made of a material with a higher stiffness than the main material used as the material of the main body of the bumper beam 30 is provided, e.g. the stiffening 35 be made of fiber-reinforced plastic composite materials, glass fiber, natural fiber, carbon fiber, aramid fiber, ultra-high molecular weight polyethylene fiber (UHMWPE fiber), whereby the cross-sectional structure, thickness, shape and the like may vary.

[0010] However, the prior art plastic composite bumper beam does not describe which type of stiffening device 35 when inserting the stiffener 35 There is no suggestion that if the structure of the stiffener 35, such as the thickness or shape, is different and irregular, different devices are required, or whether different cores are used. As a result, it is assumed that each core or the like according to the profile structure of the stiffener 35 or the thickness or shape of the stiffener 35 used in conventional technology, where productivity is significantly reduced by the use of various devices.

[0011] The information disclosed in this Background of the Invention section is provided only to facilitate understanding of the general background of the invention and should not be considered as an acknowledgment or any form of indication that this information constitutes prior art already known to a person skilled in the art. Short summary

[0012] Various aspects of the present invention are directed to providing an injection molding apparatus configured for inserting an atypical stiffener, in which an elastic clamp elastically compresses both sides of the atypical stiffener in conjunction with the width of an atypical stiffener to hold it in position between an upper core and a lower core (when the width is large, it retracts backward by elasticity, and when the width is small, it moves forward).

[0013] Various aspects of the present invention are directed to providing an injection molding apparatus configured to insert an atypical stiffener and to securely and accurately hold the correct position of the atypical stiffener inserted into the injection molded product by elastically pressing the atypical stiffener from both sides by an elastic clamp on one side and an elastic clamp on the other side, even if the width of the atypical stiffener is different (even if the width of the atypical stiffener is irregular).

[0014] Various aspects of the present invention aim to provide an injection molding apparatus adapted to employ an atypical stiffener in which the vertical support and the horizontal elastic bundle are mounted to facilitate embedding of a lower mold and a lower core when the elastic clamp is provided on one side and the elastic clamp on the other side, wherein a horizontal elastic bundle is mounted on the upper end portion of the vertical support while being supported by the lower mold.

[0015] Various aspects of the present invention are directed to providing an injection molding apparatus configured for inserting an atypical stiffener, in which the horizontal elastic bundle of one elastic clamp on one side and the horizontal elastic bundle of the other elastic clamp on the other side can elastically press the upper wide and lower narrow spaces on both sides of the atypical stiffener, wherein the resin melt in the lower mold and the upper mold is cured so that it can be quickly separated from the horizontal elastic bundle on both sides when it is removed upwardly therefrom.

[0016] Various aspects of the present invention are directed to providing an injection molding apparatus adapted for inserting an atypical stiffener, in which the vertical supports of the elastic clamp on one side and the elastic clamp on the other side are each fixed near the lower end portion of the lower mold, and are then inserted into the tilt holes of the tilt holders and are tilted at different distances from the upper end portion of the lower mold, which enables rigid support of the horizontal elastic bundle, so that it is possible to insert an atypical stiffener without shaking in the mass production of the injection molded products.

[0017] Various aspects of the present invention are directed to providing an injection molding apparatus configured for inserting an atypical stiffener, in which elastic pins and springs and tightening screws are used in a fixed bundle at all times to ensure the easy assembly by simply embedding them in the lower core, and the elasticity of the spring is assisted by the tightening screw coupled with the screw groove of the wide tunnel, the elastic pins are fixed to the stopper by the limiting claw, so that the side surface of the atypical stiffener is flexibly pressed.

[0018] Various aspects of the present invention are directed to providing an injection molding apparatus configured to insert an atypical stiffener such that it ensures smooth adhesion corresponding to the width of the atypical stiffener.

[0019] Various aspects of the present invention are directed to providing an injection molding apparatus configured for inserting an atypical stiffener in which the narrow bar and the wide bar of the vertical support are inserted into the narrow vertical grooves and the wide vertical grooves of the rigid bundle, and the fixing pin is inserted into the inner horizontal hole via the outer horizontal hole in a state in which the support step is in contact with the fixing step and the horizontal elastic bundle is slightly embedded in the lower core, thereby ensuring a stable arrangement.

[0020] In various aspects of the present invention, an injection molding apparatus for inserting an atypical stiffener is configured to include an upper mold M1 with an upper core C1 and a lower mold M2with a lower core C2 for producing an injection-molded product S by absorbing synthetic resin melt and curing in a state in which an atypical stiffening B whose width is not constant, using elastic clamps T which is formed by the lower mold M2 supported, into the lower core C2 embedded, with the width of the atypical stiffening B are engaged, with both sides being elastically pressed to prevent the atypical stiffening B which, when the resin melt is introduced, is in a correct position between the upper core C1 and the lower core C2 introduced through the atypical stiffener B.

[0021] The present invention is to elastically press both sides of an atypical stiffener by an elastic clamp in conjunction with the width of an atypical stiffener to hold it in position between an upper core and a lower core (when the width is large, it retracts by elasticity, and when the width is small, it moves forward).

[0022] The present invention is to securely and accurately hold the atypical stiffener inserted into the injection-molded product by elastically pressing the atypical stiffener with an elastic clamp on one side and an elastic clamp on the other side from both sides even if the width of the atypical stiffener is different (even if the width of the atypical stiffener is irregular).

[0023] The present invention is to provide an injection molding apparatus adapted to employ an atypical stiffener in which the vertical support and the horizontal elastic bundle are mounted to facilitate embedding of a lower mold and a lower core when the elastic clamp is provided on one side and the elastic clamp on the other side, wherein a horizontal elastic bundle is mounted on the upper end portion of the vertical support while being supported by the lower mold.

[0024] The present invention is to provide an injection molding apparatus adapted for inserting an atypical stiffener, in which the horizontal elastic bundle of the elastic clamp on one side and the horizontal elastic bundle of the elastic clamp on the other side can be elastically pressed at the upper wide and lower narrow spaces on both sides of the atypical stiffener, wherein the synthetic resin melt is cured in the lower mold and the upper mold so that it can be quickly separated from the horizontal elastic bundle on both sides when removed in an upward direction.

[0025] The present invention is to provide an injection molding apparatus adapted for inserting an atypical stiffener, in which the vertical beams of the elastic clamp on one side and the elastic clamp on the other side are respectively fixed near the lower end portion of the lower mold, and then inserted into the tilt holes of the tilt holder and tilted at different distances from the upper end portion of the lower mold, thereby enabling rigid support of the horizontal elastic bundle, so that it is possible to insert an atypical stiffener without shaking at the time of mass production.

[0026] The present invention is to provide an injection molding apparatus configured for inserting an atypical stiffener, in which elastic pins and springs and tightening screws are used in a fixed bundle at all times to ensure the easy assembly by simply embedding them in the lower core, the elasticity of the spring assisted by the tightening screw coupled with the screw groove of the wide tunnel, and the elastic pins are fixed to the stopper via the limit claw, so that the side surface of the atypical stiffener is flexibly pressed, so that smooth adhesion can be ensured according to the width of the atypical stiffener.

[0027] The present invention is to provide an injection molding apparatus configured for inserting an atypical stiffener in which the narrow bar and the wide bar of the vertical support are inserted into the narrow vertical grooves and the wide vertical grooves of the fixed bundle, the fixing pin is inserted into the inner horizontal hole via the outer horizontal bore in a state where the support step is in contact with the fixing step, the horizontal elastic bundle is simply embedded in the lower core, ensuring a stable arrangement.

[0028] The methods and apparatus of the present invention have additional features and advantages which will be apparent from or more particularly set forth in the accompanying drawings incorporated herein and the following detailed description, which together serve to explain certain principles of the present invention. Character list Fig. 1A is an exploded perspective view showing a configuration of a conventional bumper assembly used in the prior art. Fig. Figure 1B is a perspective view showing a prior art plastic composite bumper beam for a vehicle. Fig. 2A is a perspective view showing a bumper beam used in a vehicle as an example of an injection-molded product for explaining an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention. Fig. 2B is a perspective view showing a bumper beam used in a vehicle as an example of an injection-molded product for explaining an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention. Fig. 3A and Fig. 3B are exploded perspective views of an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention, including an injection molded product viewed from above. Fig. 3C is an exploded perspective view of an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention with an injection molded product viewed from below. Fig. 4A is a perspective view showing a pair of lower cores in a state where a lower mold is disassembled for explaining an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention. Fig. 4B is a perspective view showing a pair of lower cores and an elastic clamp in a state where a lower mold is disassembled, for explaining an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention. Fig. 4C is a perspective view illustrating, by way of example, a pair of lower cores and an elastic clamp for explaining an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention. Fig. 4D is a partially enlarged perspective view of a lower core and a resilient clamp for illustrating an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention. Fig. 5A is a side view of a pair of lower cores and a resilient clamp for illustrating an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention. Fig. 5B is a perspective view of an elastic clamp and a tilt holder viewed from the side to illustrate an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention. Fig. 5C is a perspective view illustrating an exemplary elastic clamp and a tilt holder with an irregular reinforcing member for explaining an injection molding apparatus for inserting an atypical stiffener according to an exemplary embodiment of the present invention. Fig. 6A is a perspective view illustrating, by way of example, a vertical support and a horizontal elastic bundle forming an elastic clamp of one side and an elastic clamp of another side used in an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention. Fig. 6B is an exploded perspective view illustrating, by way of example, a vertical support and a horizontal elastic bundle forming an elastic clamp on one side and an elastic clamp on the other side used in an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention.

[0029] It should be understood that the accompanying drawings are not necessarily to scale and present a somewhat simplified representation of various features illustrating the basic principles of the present invention. The specific design features of the present invention as disclosed herein, including, for example, specific dimensions, orientations, positions, and shapes, will be determined in part by the particular intended application and use environment.

[0030] In the figures, the reference numerals indicate identical or equivalent parts of the present invention in the individual figures of the drawing. Detailed description

[0031] Reference will now be made in detail to various embodiments of the present invention(s), examples of which are illustrated in the accompanying drawings and described below. Although the invention(s) are described in connection with exemplary embodiments, it is to be understood that the present description is not intended to limit the invention(s) to these exemplary embodiments. On the contrary, the invention(s) are intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents, and other embodiments that may be included within the spirit and scope of the invention as defined by the appended claims.

[0032] An exemplary embodiment of an injection molding apparatus configured for inserting an atypical stiffener according to an exemplary embodiment of the present invention will be described with reference to the drawings. Numerous such embodiments may exist, and the objects, features, and advantages of the present invention will be better understood from these embodiments.

[0033] Fig. 2A is a perspective view showing a bumper beam used in a vehicle as an example of an injection molded product S is used to explain an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention, and Fig. 2B is a perspective view showing a bumper beam used in a vehicle as an example of an injection molded product Sused to explain an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention.

[0034] As in Fig. 2A and Fig. 2B, for example, an injection-molded product S as a bumper beam for use in vehicles by molding a synthetic resin melt mixed and melted with a thermoplastic resin, a thermoformable resin, a binder or the like into a mold, ie an upper mold M1 and a lower mold M2 , shaped and cured. This makes it possible to achieve the atypical stiffening B to be used in such a way that it can withstand external influences (to avoid damage).

[0035] The atypical stiffening Bcan be made of a fiber-reinforced plastic composite material with high stiffness, glass fiber, natural fiber, carbon fiber, aramid fiber, ultra-high molecular weight polyethylene fiber (UHMWPE fiber), however, at the time of injection molding, it is extremely difficult to maintain the shape in the upper mold M1 and the lower mold M2 to hold, since the size of their volume or outer diameter is not fixed (because the atypical stiffening is made by interlacing, twisting or braiding).

[0036] Fig. 3A and Fig. 3B are exploded perspective views of an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention, including an injection molded product viewed from above, and Fig. 3C is an exploded perspective view of an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention including an injection molded product.

[0037] As in Fig. 2A to Fig. 3C, an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention comprises an upper mold M1 with an upper core C1 and a lower mold M2 with a lower core C2 for the production of an injection-molded product S by absorbing a synthetic resin melt and curing it in a state in which an atypical stiffening B with a non-constant width.

[0038] If the injection molded product SFor example, when manufacturing a bumper beam of a vehicle, the upper core C1 and the lower core C2 brought together in a “male” and “female” engagement with a gap in between, whereby a gap in the upper mold M1 and the lower mold allows joining along gaps and recesses, so that it is possible, as in Fig. 2A and Fig. 2B, to produce a structure in which the weight is reduced and the strength is increased by obtaining an overall plate shape with a wall or reinforcing rib.

[0039] Even if an injection-molded product S in plate form with a wall or reinforcing rib is damaged, it can easily break under external impact. In the manufacture of a bumper beam for a vehicle, an atypical stiffener Bused to increase strength. The atypical stiffening B cannot be easily placed in the upper and lower molds during injection molding, as described above M1 and M2 fix.

[0040] Fig. 4A is a perspective view showing a pair of lower cores in a state where a lower mold is disassembled, for explaining an injection molding apparatus configured for inserting an atypical stiffener according to an exemplary embodiment of the present invention, Fig. 4B is a perspective view showing a pair of lower cores and an elastic clamp in a state where a lower mold is disassembled, for explaining an injection molding apparatus configured for inserting an atypical stiffener according to an exemplary embodiment of the present invention, Fig. 4C is a perspective view illustrating, by way of example, a pair of lower cores and an elastic clamp for explaining an injection molding apparatus configured for inserting an atypical stiffener according to an exemplary embodiment of the present invention, and Fig. 4D is a partially enlarged perspective view of a lower core and a resilient clamp for illustrating an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention.

[0041] As in Fig. 2A to Fig. 4D, the injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention comprises elastic clamps T which is from the lower mold M2 supported in the lower core C2are embedded, with the width of the atypical stiffening B are engaged and are designed to elastically pressurize both sides to compensate for the atypical stiffening B to keep the atypical stiffening B when introducing the resin melt into a correct position between the upper core C1 and the lower core C2 through the atypical stiffener B is inserted.

[0042] In the injection molding apparatus adapted for inserting an atypical stiffener according to an exemplary embodiment of the present invention, an elastic clamp T elastically presses both sides of the atypical stiffener B in connection with the width of an atypical stiffener B, to sandwich them between an upper core C1 and a lower core C2in position (if the width is large, it retracts backwards due to elasticity, and if the width is small, it moves forwards), and therefore the injection-molded product S be produced in large quantities without defects.

[0043] Fig. 5A is a side view of a pair of lower cores and an elastic clamping device for explaining an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention, Fig. 5B is a perspective view of an elastic clamp and a tilt holder, viewed from the side, to illustrate an injection molding apparatus configured for inserting an atypical stiffener according to an exemplary embodiment of the present invention, and Fig. 5C is a perspective view illustrating an exemplary elastic clamp and a tilt holder with an irregular reinforcing member for explaining an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention.

[0044] As in Fig. 2A to Fig. 5C, the elastic clamping device comprises T applied to the injection molding apparatus designed for inserting an atypical stiffener according to an exemplary embodiment of the present invention, an elastic clamp T1 on one side and an elastic clamp T2 on the other side, whereby both sides of the atypical stiffening B elastically pressed between them.

[0045] The present invention is to securely and accurately hold the atypical stiffener inserted into the injection-molded product by elastically pressing the atypical stiffener with an elastic clamp on one side and the elastic clamp on the other side from both sides, even if the width of the atypical stiffener is different (even if the width of the atypical stiffener is uneven), so that the injection-molded product S can be produced in large quantities without defects. The elastic clamp T1 on one side and the elastic clamp T2 on the other side opposite each other with the atypical stiffening B between them, they can be arranged opposite each other, or they can be arranged as in Fig. 5C, i.e. offset from one another.

[0046] Fig. 6A is a perspective view illustrating an example of a vertical support 50 and a horizontal elastic bundle 60 illustrates an elastic clamp T1 on one side and an elastic clamp T2 on the other hand, applied to an injection molding apparatus adapted to insert an atypical stiffener according to an exemplary embodiment of the present invention, and Fig. 6B is an exploded perspective view illustrating an example of a vertical support 50 and a horizontal elastic bundle 60 illustrates an elastic clamp T1 on one side and an elastic clamp T2 on the other hand, applied to an injection molding apparatus configured to insert an atypical stiffener according to an exemplary embodiment of the present invention.

[0047] The elastic clamp T1 on one side and the elastic clamp T2 on the other hand, which are used in the injection molding device designed to insert an atypical stiffener, each comprise a vertical support 50 , which is on the lower mold M2 mounted and placed, and a horizontal elastic bundle 60 , which is located on the upper end section of the vertical support 50 mounted and inserted into the lower core C2 embedded to cover both sides of the atypical stiffening B to put elastic pressure in between.

[0048] The present invention serves to provide an injection molding device designed for inserting an atypical stiffener, in which the vertical support 50 and the horizontal elastic bundle 60 are mounted to embed the lower mold M2 and lower coreC2 to facilitate if the elastic clamp T1 on one side and the elastic clamp T2 on one side, with a horizontal elastic bundle 60 at the upper end section of the vertical support 50 is mounted, while it is from the lower mold M2 is supported.

[0049] In addition, the vertical support 50 the elastic clamp T1 on one side and the vertical support 50 the elastic clamp T2 on the other side with an inclination away from the lower end section of the lower mold M2 towards the upper end portion of the same so that the horizontal elastic bundle 60 the elastic clamp T1 on one side and the horizontal elastic bundle 60 the elastic clamp T2 on the other hand, the atypical stiffening Bin between in upper wide and lower narrow intervals when inserted into the lower core C2 can be elastically subjected to pressure.

[0050] In an exemplary embodiment of the present invention, the horizontal elastic bundle 60 the elastic clamp T1 on one side and the horizontal elastic bundle 60 the elastic clamp T2 on the other hand, elastically press the upper wide and lower narrow gaps on both sides of the atypical stiffener B, whereby the resin melt in the lower mold M2 and the upper mold M1 cured, so that when removed upwards it quickly detaches from the horizontal elastic bundle 60 can be separated on both sides.

[0051] In addition, the elastic clamping device T further comprises a tilt holder 70, which is located at a central end section of the lower mold M2 connected and tilt holes 71 which are drilled obliquely at an angle, closer at a lower section and further away at an upper section, wherein the vertical support 50 the elastic clamp T1 on one side and the vertical support 50 the elastic clamp T2 on the other hand closer to the lower end section of the lower mold M2 are attached, and then into the tilt holes 71 are used, whereby they are placed at different distances from the upper end section of the lower mold M2 are inclined.

[0052] In an exemplary embodiment of the present invention, the vertical supports 50 the elastic clamp T1 on one side and the elastic clamp T2on the other side near the lower end section of the lower mold M2 and are then inserted into the tilt holes 71 of the tilt holder 70 inserted, whereby they are placed at different distances from the upper end section of the lower mold M2 inclined, which provides firm support for the horizontal elastic bundle 60 so that it is possible to achieve an atypical stiffening B without them “wobbling” when the injection-molded products S be mass-produced.

[0053] The horizontal elastic bundle 60 the elastic clamp T1 on one side and the elastic clamp T2 on the other hand, a solid bundle 61 with a wide tunnel 61c , which is located at the upper end section of the vertical support 60 and with a narrow tunnel61b and a screw groove 61d with a stop 61a towards the atypical stiffener B and embedded in the lower core C2 , an elastic pin 62 , which runs along the wide tunnel 61c moved back and forth and a limit claw 62a which has the stop 61a covers, and elastically the side of the atypical stiffening B which is related to the width of the atypical stiffening B through the narrow tunnel 61b is engaged, a spring 63 that enter the wide tunnel 61c is inserted and the elastic pin 62 elastically presses, and a clamping screw 64 which is connected to the screw groove 61d is screwed to the spring 63 to support.

[0054] In an exemplary embodiment of the present invention, elastic pins 62 and feathers 63and clamping screws 64 at any time in a fixed bundle 61 used to ensure the simplicity of the arrangement by simply embedding it in the lower core C2 to ensure, whereby the elastic spring 63 , which is driven by the clamping screw 64 supported, coupled with the screw groove 61d the wide tunnel 61c , and the elastic pins 62 through the limit claw 62a at the limit 61a are attached so that the side surface of the atypical stiffener B is flexibly subjected to pressure so that a uniform adhesion according to the width of the atypical stiffening B can be guaranteed.

[0055] In addition, the fixed bundle includes 61 a narrow vertical groove 61e formed in the lower section in the vertical direction and a fastening step 61g , which is characterized by a wide vertical groove61f and includes an external horizontal hole 61h towards the narrow vertical groove 61e , where the vertical support 50 a narrow rod 51 includes the fastening level 61g corresponds to the narrow vertical groove 61e and the wide vertical groove 61f formed by the wide bar 52 formed support level 53 and includes an internal horizontal hole 54 , which is connected to the external horizontal hole 61h matches, with a fixing pin 80 in the internal horizontal hole 54 via the external horizontal hole 61h is mounted.

[0056] In an exemplary embodiment of the present invention, the narrow rod 51 and the wide bar 52 of the vertical support 50 into the narrow vertical grooves61e and the wide vertical grooves 61f of the fixed bundle 61 inserted, whereby the fixing pin 80 via the outer horizontal bore 61h into the inner horizontal hole 54 is used in a condition in which the support level 53 with the fastening step 61g is in contact and the horizontal elastic bundle 60 slightly into the lower core C2 embedded, ensuring a stable arrangement.

[0057] Thus, in the injection molding device designed for inserting an atypical stiffener according to an exemplary embodiment of the present invention, an elastic clamping device T both sides of the atypical stiffening B in connection with the width of an atypical stiffener B elastically together to sandwich them between an upper core C1 and a lower coreC2 in position (when the width is large, it retracts backward due to elasticity, and when the width is small, it moves forward), which is why the injection molded product S can be produced in large quantities without defects.

[0058] The present invention is industrially applicable, wherein an injection-molded product is manufactured by injecting into a mold a melt of a synthetic resin which is mixed and melted with a thermoplastic resin, a thermoformable resin, a binder, etc.

[0059] For the sake of clarity and accurate definition in the appended claims, the terms "upper," "lower," "inner," "outer," "top," "bottom," "upward," "downward," "front," "rear," "inside," "outside," "inward," "outward," "inner," "outer," "forward," and "rearward" are used to describe features of the exemplary embodiments with respect to the positions of the features illustrated in the figures.

[0060] The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and explanation. They are not intended to be exhaustive or to limit the invention to the forms disclosed, and obviously many changes and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and their practical application in order to enable those skilled in the art to make and utilize various exemplary embodiments of the present invention, as well as various alternatives and modifications thereof. It is intended that the scope of the invention be defined by the appended claims and their equivalents.

Claims

[1] An injection molding apparatus for inserting an atypical stiffener, comprising an upper mold provided with an upper core and a lower mold provided with a lower core, for producing an injection-molded product by receiving molten synthetic resin and curing it in a state in which the atypical stiffener whose width is not constant is inserted, the injection molding apparatus comprising: an elastic clamping device supported by the lower mold, embedded in the lower core, engaged with a width of the atypical stiffener and having a first side and elastically compressing a second side of the atypical stiffener to hold the atypical stiffener to be inserted into a predetermined position between the upper core and the lower core by the elastic clamping device during the introduction of the synthetic resin melt. [2] The injection molding apparatus for inserting the atypical stiffener according to claim 1, wherein the elastic clamping means comprises an elastic clamp on a first side that elastically presses the first side of the atypical stiffener and an elastic clamp on a second side that elastically presses the second side of the atypical stiffener to elastically press the atypical stiffener between the elastic clamp on the first side and the elastic clamp on the second side. [3] The injection molding apparatus for inserting the atypical stiffener according to claim 2, wherein each of the elastic clamp on the first side and the elastic clamp on the second side comprises: a vertical support mounted and supported on the lower mold; and a horizontal elastic bundle mounted on an upper end portion of the vertical beam and embedded in the lower core for elastically compressing the first side and the second side of the atypical stiffener between the first side of the elastic stiffener and the second side of the elastic stiffener. [4] The injection molding apparatus for inserting the atypical stiffener according to claim 3, wherein each vertical beam of the elastic clamp on the first side and the elastic clamp on the second side is set to be inclined from a lower end portion of the lower mold to an upper end portion of the lower mold, so that the horizontal elastic bundle of the elastic clamp on the first side and the horizontal elastic bundle of the elastic clamp on the second side are formed to elastically compress the atypical stiffener by the elastic clamp on the first side and the elastic clamp on the second side at upper wide and lower narrow intervals, while the horizontal elastic bundle of the elastic clamp on the first side and the horizontal elastic bundle of the elastic clamp on the second side are located in the lower core. [5] The injection molding apparatus for inserting the atypical stiffener according to claim 4, wherein the elastic clamping means further comprises a tilt holder connected to a middle end portion of the lower mold and including tilt holes formed obliquely at a predetermined angle such that the tilt holes are close to each other at their lower portions and are distant from each other at their upper portions. [6] The injection molding apparatus for inserting the atypical stiffener according to claim 5, wherein the vertical support of the elastic clamp on the first side and the vertical support of the elastic clamp on the second side are fixed adjacent to the lower end portion of the lower mold, and then inserted into the inclination holes and inclined to the upper end portion of the lower mold at mutually different intervals between the inclination holes. [7] The injection molding apparatus for inserting the atypical stiffener according to claim 3, wherein each horizontal elastic bundle of the elastic clamp on the first side and the elastic clamp on the second side comprises: a solid bundle embedded in the lower core, comprising: a wide tunnel attached to the upper end section of the vertical support; a narrow tunnel connected to a first side of the wide tunnel; and a screw groove connected to a second side of the wide tunnel; and a stop formed between the narrow tunnel and the wide tunnel in the direction of the atypical stiffening, an elastic pin slidably mounted in the wide tunnel and reciprocating along the wide tunnel and having a limiting claw covering the stopper and elastically pressing one side of the atypical stiffener engaged with a width of the atypical stiffener across the narrow tunnel, an elastic element inserted into the wide tunnel and elastically pressing the elastic pin, and a tension screw screwed to a portion of the screw groove to support the elastic element. [8] An injection molding apparatus for inserting the atypical stiffener according to claim 7, wherein the rigid bundle further comprises: a narrow vertical groove formed in a lower portion of each horizontal elastic bundle in a vertical direction of each horizontal elastic bundle; and a fastening step formed by a wide vertical groove; and an external horizontal hole formed in the direction of the narrow vertical groove, the vertical support comprising: a narrow bar corresponding to the fastening step formed by the narrow vertical groove and the wide vertical groove; a support step formed between the narrow bar and the wide bar; and an inner horizontal bore that coincides with the outer horizontal bore, and wherein a locating pin is mounted in the inner horizontal hole over the outer horizontal hole.

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