Molding Device for Double Injection Color Cone Hanger Molding

Abstract

The present invention relates to a mold device for molding a double injection color cone hanger. According to the mold device for molding a double injection color cone hanger, it comprises a first hopper and a second hopper into which a first resin and a second resin are respectively fed; a first extruder that receives the first resin from the first hopper and plasticizes the resin into a molten state using heating and shear stress; a second extruder that receives the second resin from the second hopper and plasticizes the resin into a molten state using heating and shear stress; and a mold part that sequentially receives the first resin and the second resin from the first extruder and the second extruder and supplies the second resin onto a preform molded on the first resin to complete a molded product having horizontal lines formed thereon. Through a double injection process, two different resins are sequentially molded, and the second resin is completely fused onto the preform molded by the first resin, thereby increasing interfacial adhesion with a high-strength bonding structure, and preventing delamination or interfacial It minimizes the possibility of interfacial separation, and as the injected second resin is integrally molded into the preform groove, it forms horizontal lines, thereby improving the impact resistance and fatigue resistance of the collar hanger, and has the effect of enhancing stability and aesthetics through a stable structure even under mechanical stress.

Description

Technology Field

[0001] Embodiments of the present invention relate to a mold device for molding a double injection color cone hanger. Background Technology

[0003] The following description merely provides background information related to the present embodiment and does not constitute prior art.

[0004] Generally, traffic cones are used as a means of traffic safety to prevent safety accidents involving workers and pedestrians when communication construction, manhole work, construction site control, parking lot entrances, or other boundary markings requiring safety are required in places such as roads and sidewalks.

[0005] These traffic cones are erected on the ground to ensure safety during various construction and traffic control guidance, and drivers or pedestrians can take caution by visually confirming the installed traffic cones and recognizing that construction or traffic control is in progress ahead.

[0006] Meanwhile, the traffic cones are individually installed on the ground through a flat bottom surface to indicate that construction is in progress or to provide guidance. Additionally, two or more traffic cone hangers can be mounted on the traffic cones.

[0007] In other words, hooks that can be hooked onto the upper side of the traffic cone can be connected to both sides of the traffic cone hanger so that both sides of the traffic cone hanger can be fixed to the traffic cone.

[0008] In order to improve the visibility of these traffic cone holders, workers had to manually attach reflective sheets that reflect vehicle lights or self-illuminating strips to the outer edges of the holders, which resulted in significant costs due to the increased number of work processes. The problem to be solved

[0010] The present invention aims to provide a mold device for molding a double injection color cone hanger that can automate the process by allowing the manual process of attaching reflective sheets or luminous strips to the color cone hanger to be molded through double injection. means of solving the problem

[0012] According to one aspect of the present embodiment, a molding device for molding a double injection color cone hanger comprises a first hopper and a second hopper into which a first resin and a second resin are respectively fed; a first extruder that receives the first resin from the first hopper and plasticizes the resin into a molten state using heating and shear stress; a second extruder that receives the second resin from the second hopper and plasticizes the resin into a molten state using heating and shear stress; and a mold part that sequentially receives the first resin and the second resin from the first extruder and the second extruder and supplies the second resin onto a preform molded in the first resin to complete a molded product having horizontal lines formed thereon.

[0013] Additionally, the mold part may include a first mold having a branching hole formed therein for branching the first resin into a plurality of branches, a second mold including a first molding hole through which a preform formed through the branching hole corresponding to the branching hole passes to form a shape pre-set by the user, and a third mold including a second molding hole that controls the thickness of the preform discharged from the first molding hole and connects the branched preforms to each other.

[0014] Additionally, the first molding hole may include a groove projection whose outer circumference protrudes toward the central axis from the central axis of the second mold, and a groove formed in the same direction as the groove projection toward the central axis of the second mold.

[0015] Additionally, the mold part may include a fourth mold comprising a third molding hole through which a preform discharged from the second molding hole passes, and a resin supply path that supplies the second resin to a plurality of resin discharge ports that receive the second resin from the second extruder and supply it to the third molding hole.

[0016] In addition, it may include a molding product rotation unit that rotates the molded product formed in the above-mentioned mold part in one direction.

[0017] Additionally, the molded product rotation unit may include a case, a drive motor provided in the case, a drive belt that receives driving force from the drive motor and contacts the lower outer periphery of the molded product to rotate the molded product in a circumferential direction, and a first support roller that slides parallel to each other in a horizontal direction in the case and adjusts the elastic force of the drive belt.

[0018] In addition, the molded product rotation unit may include a second support roller that is provided horizontally parallel to the upper side of the first support roller and slides vertically to be in close contact with the outer periphery of the molded product. Effects of the invention

[0020] As explained above, the mold device for molding a double injection color cone hanger according to the present invention has the following effects.

[0021] First, according to the mold device for molding a double injection color cone hanger of the present invention, two different resins are sequentially molded through a double injection process, and the second resin is completely fused onto a preform molded by the first resin, thereby increasing interfacial adhesion with a high-strength bonding structure, and minimizing the possibility of delamination or interfacial separation occurring inside the molded product, and as the injected second resin is integrally molded into the preform groove, a horizontal line is formed, thereby improving the impact resistance and fatigue resistance of the color cone hanger, and improving stability and aesthetics with a stable structure even under mechanical stress.

[0022] Secondly, according to the mold device for molding a double injection color cone hanger of the present invention, automated molding is possible in which finished products are continuously produced without a separate post-processing step as the continuous process proceeds through each mold, thereby reducing the number of process days. Additionally, as the uniformity of resin filling (fill balance) is maintained, quality variations between individual products are minimized, reducing defects and resulting in cost savings.

[0023] Thirdly, according to the mold device for molding a double injection cone hanger of the present invention, the tension of the drive belt is adjusted by the support roller to evenly distribute the force applied to the molded product, thereby preventing asymmetric stress concentration during molding and stably maintaining the shape of the final product.

[0024] Fourth, according to the mold device for molding a double injection color cone hanger of the present invention, the molded product (color cone hanger) formed according to each mold can cause cracking and breakage of the product due to fatigue accumulation caused by repeated load and stress changes through many processes, but by rotating the molded product at a smooth and constant speed through the molded product rotation unit, it is possible to prevent fatigue failure caused by repeated stress changes and thus secure durability.

[0025] The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, terms and words used in this specification and claims should not be interpreted in their ordinary and dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor may appropriately define the concept of the terms to best describe his invention. Brief explanation of the drawing

[0027] FIG. 1 is a perspective view showing one embodiment of a mold device for molding a double injection collar hanger according to the present invention. Figure 2 is a figure showing the first mold among the mold parts of Figure 1. Figure 3 is a figure showing the second mold among the mold parts of Figure 1. Figure 4 is a figure showing the third mold among the mold parts of Figure 1. Figure 5 is a figure showing the fourth mold among the mold parts of Figure 1. FIG. 6 is a front view showing another embodiment of a mold device for molding a double injection cone hanger according to the present invention. Fig. 7 is a right-side view of Fig. 6. Specific details for implementing the invention

[0028] Hereinafter, the structure and operation of embodiments of the present invention will be described in detail with reference to the attached drawings. However, the present invention is not intended to be limited to specific disclosed forms, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and technical scope of the present invention. In this application, terms such as "comprising" or "having" are intended to indicate the existence of features, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, steps, actions, components, parts, or combinations thereof. That is, throughout the specification, when a part is described as "comprising" a certain component, unless specifically stated otherwise, this means that it may include additional components rather than excluding other components.

[0029] Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0030] Hereinafter, repetitive descriptions and specific descriptions of known functions and configurations that could unnecessarily obscure the essence of the invention are omitted to ensure that the essence of the invention is not obscured. Embodiments of the invention are provided to more fully explain the invention to those with average knowledge in the art. Accordingly, the shapes and sizes of elements in the drawings may be exaggerated for clearer explanation.

[0031] FIG. 1 is a perspective view showing an embodiment of a mold device for molding a double injection cone hanger according to the present invention, FIG. 2 is a diagram showing a first mold among the mold parts of FIG. 1, FIG. 3 is a diagram showing a second mold among the mold parts of FIG. 1, FIG. 4 is a diagram showing a third mold among the mold parts of FIG. 1, and FIG. 5 is a diagram showing a fourth mold among the mold parts of FIG. 1.

[0032] Referring to FIGS. 1 to 5, an embodiment of a mold device for molding a double injection color cone hanger according to the present invention is described. The mold device for molding a double injection color cone hanger includes a first extruder (10), a second extruder (20), a mold section (30), and a cooling section (40).

[0033] The first extruder (10) receives the first resin from the first hopper (11) into which the first resin is fed, and can plasticize the resin into a molten state using heating and shear stress. The first extruder (10) can plasticize the resin at a temperature and pressure preset by the user and supply it to a mold.

[0034] It can be melted at a predetermined temperature. The first extruder (10) can transport the first resin from the first hopper (11) to the rear end, which is the corresponding opposite direction.

[0035] The first extruder (10) can be connected to the mold part (30) at the rear end. The first extruder (10) can be securely fixed by sequentially providing a connector (12) and a fixing member (13) that fix the mold part (30) between the first extruder (10) and the mold part (30).

[0036] The second extruder (20) receives the second resin from the second hopper (21) into which the second resin is fed, and can plasticize the resin into a molten state using heating and shear stress. The second extruder (20) can plasticize the resin at a temperature and pressure preset by the user and supply it to a mold.

[0037] The second extruder (20) can transport the melted second resin to the rear end, which is opposite to the second hopper (21). The second extruder (20) can be connected so that the rear end supplies the second resin to the fourth mold (34) described later.

[0038] Meanwhile, the first resin and the second resin may be any one of PE (polyethylene, HDPE / LDPE), PP (polypropylene), ABS (acrylonitrile butadiene-styrene), PA (nylon, polyamide), and PC (polycarbonate). The first resin and the second resin may be provided in different complementary colors to improve visibility. For example, the first resin and the second resin may be provided in PP material to provide lightweight properties, chemical resistance, elasticity, and cost-saving effects.

[0039] The mold part (30) may include a first mold (31), a second mold (32), a third mold (33), and a fourth mold (34).

[0040] The mold part (30) receives the first resin and the second resin sequentially from the first extruder (10) and the second extruder, and discharges the second resin onto the preform (F1) molded in the first resin to form a horizontal line (F2) on the preform (F1) to complete the molded product (Ft). This molded product (Ft) may be a cone hanger.

[0041] Referring to FIG. 2, FIG. 2(a) is a front view of the first mold (31) and FIG. 2(b) is a vertical cross-section of FIG. 2(a). The first mold (31) may include a bolting hole (311) through which a bolt passes and a branching hole (313) for branching the first resin into multiple parts.

[0042] The branch hole (313) passes from one side in the direction in which the first resin is introduced to the other side in the opposite direction and can be molded into a predetermined shape. The branch hole (313) may have an inner diameter (a, a') in which the thickness gradually decreases from one side to the other side. The branch hole (313) may be provided with at least one branch.

[0043] Therefore, when the first resin passes through the branch hole (313) of the first mold (31), multiple preforms can be molded according to the number of branch holes (313).

[0044] Referring to FIG. 3, FIG. 3 (a) is a front view of the second mold (32) and FIG. 3 (b) is a vertical cross-section of FIG. 3 (a). The second mold (32) may include a bolting hole (321) through which a bolt passes corresponding to the bolting hole of the first mold (31), a refrigerant passage (322) through which a refrigerant that cools the second mold (32) moves, a first molding hole (323) corresponding to the branch hole (313), and a shaft (326) protruding from the axis center.

[0045] A plurality of refrigerant passages (322) are provided in the direction in which the first resin moves in the second mold (32), so that the refrigerant can move and exchange heat with the second mold (32).

[0046] The first molding hole (323) corresponds to the branch hole (313), and the preform formed through the branch hole (313) passes through to be molded into a shape pre-set by the user.

[0047] For example, the first molding hole (323) can form a preform groove in the preform through a groove projection (324) whose outer circumference protrudes toward the central axis of the second mold (32), and can form a preform projection protruding from the inner circumference of the preform through a groove (325) formed in the same direction as the groove projection (324) toward the central axis of the second mold (32).

[0048] The shaft (326) protrudes from the central axis of the second mold (32) so that the center of the third mold (33) can be inserted. The shaft (326) may be provided with a refrigerant passage (322). The inner side of the first molding hole (323) may be formed on the outer circumference of such a shaft (326).

[0049] Referring to FIG. 4, FIG. 4 (a) is a front view of the third mold (33) and FIG. 4 (b) is a vertical cross-section of FIG. 4 (a). The third mold (33) may include a shaft hole (not shown in the drawing) through which a shaft (326) passes, a bolting hole (331) through which a bolt passes corresponding to the bolting holes of the first mold (31) and the second mold (32), a refrigerant passage (332) through which a refrigerant that cools the third mold (33) moves, and a second molding hole (333) that connects branched preforms to each other while controlling the thickness (c) of the preform discharged from the first molding hole (323).

[0050] The refrigerant passage (332) may be multiple so that the refrigerant moves in the direction in which the first resin moves to the third mold (33).

[0051] The second molding hole (333) may have a diameter (c) smaller than the diameter (b, FIG. 3) of the first molding hole (323) corresponding to the first molding hole (323). The diameter (c) of the second molding hole (333) may have an inner circumference that is closer to the outer circumference with respect to the shaft (326).

[0052] The second molding hole (333) is connected to each other so that multiple preforms can be connected into one preform.

[0053] For example, the third mold (33) can be inserted into the shaft (326). The second molding hole (333) can be connected to each other as the preform passes through and expands in the circumferential direction.

[0054] Referring to FIG. 5, FIG. 5 (a) is a front view of the fourth mold (34) and FIG. 5 (b) is a vertical cross-section of FIG. 5 (a). The fourth mold (34) includes a shaft hole (not shown in the drawing) through which a shaft (326) passes, a bolting hole (341) through which a bolt passes corresponding to the bolting holes of the first mold (31), the second mold (32), and the third mold (33), a refrigerant passage (342) through which a refrigerant that cools the fourth mold (34) moves, a resin supply passage (343), and a resin discharge port (344), so that the second resin can be supplied to the preform supplied from the third mold (33).

[0055] The refrigerant passage (342) may be multiple so that the refrigerant moves in the direction in which the first resin moves to the fourth mold (34).

[0056] The resin supply channel (343) can supply the second resin to the resin discharge port (344). The resin supply channel (343) can be formed in a circular shape inside the fourth mold (34). The resin supply channel (343) may include a resin discharge port (344) that guides the second resin into each preform groove.

[0057] A plurality of resin discharge ports (344) may be formed to receive the second resin from the second extruder (20) and supply it to the third molding hole (not shown in the drawing). The resin discharge ports (344) can guide the second resin into the preform groove of the preform passing through the third molding hole.

[0058] The resin discharge port (344) discharges the second resin moving along the resin supply path (343) into each preform groove, thereby forming a horizontal line (F2) on the preform (F1) as shown in FIG. 1 and completing the molded product (Ft).

[0059] Meanwhile, the resin discharge port (344) is provided to be movable in a radial direction from the central axis toward the resin supply path (343) and can be adjusted according to the thickness of the diameter of the preform.

[0060] This fourth mold (34) enables effective cooling through the refrigerant path (342) and uniform supply of the second resin using the resin supply path (343) and the resin discharge port (344). Since the resin discharge port can be moved in a radial direction and adjusted according to the diameter of the preform, it is possible to mold a precise molded product, thereby enabling the production of color cone hangers of various sizes.

[0061] As shown in FIG. 1, the cooling unit (40) can cool the molded product (Ft) discharged from the mold (30). The cooling unit (40) is equipped with cooling water or a refrigerant inside and can cool the molded product (Ft) by moving in the direction of supply.

[0062] Afterward, a cutting part (not shown) that cuts the finished molded product (Ft) to a certain length and a hook part inserted into the upper part of the safety cone can be connected to each of the two ends of the molded product (Ft) and used.

[0063] According to one embodiment of the mold device for molding a double injection color cone hanger of the present invention, two different resins are sequentially molded through a double injection process, and the second resin is completely fused onto a preform molded by the first resin, thereby increasing interfacial adhesion with a high-strength bonding structure, and minimizing the possibility of delamination or interfacial separation occurring inside the molded product, and as the injected second resin is integrally molded into the preform groove, a horizontal line is formed, thereby improving the impact resistance and fatigue resistance of the color cone hanger, and improving stability and aesthetics with a stable structure even under mechanical stress.

[0064] In addition, according to the mold device for molding a double injection color cone hanger of the present invention, automated molding is possible in which finished products are continuously produced without a separate post-processing step as the continuous process proceeds through each mold, thereby reducing the number of process days. Furthermore, as the uniformity of resin filling (fill balance) is maintained, quality variations between individual products are minimized, reducing defects and resulting in cost savings.

[0065] FIG. 6 is a front view showing another embodiment of a mold device for molding a double injection cone hanger of the present invention, and FIG. 7 is a right side view of FIG. 6.

[0066] Referring to FIGS. 6 and 7, another embodiment of the mold device for molding a double injection color cone hanger according to the present invention is described. The mold device for molding a double injection color cone hanger may include a molding product rotation unit (50) that rotates a molded product (Ft) formed in a mold part (30) in one direction.

[0067] The molded product rotation unit (50) includes a case (51), a drive motor (52), a drive belt (53), a first support roller (54), and a second support roller (55).

[0068] The case (51) may be provided with a drive motor groove into which a drive motor (52) is inserted, and a first support roller (54) and a second support roller (55) that support a drive belt (53).

[0069] The drive motor (52) can be provided in the case (51) as a unidirectional rotary motor. The drive motor (52) can be a stepper motor that provides a predetermined torque to rotate the molded product (Ft).

[0070] The drive belt (53) receives driving force from the drive motor (52) and contacts the outer circumference of the molded product (Ft), and can rotate the molded product (Ft) in one direction in the circumferential direction.

[0071] The first support roller (54) slides horizontally in parallel toward each other in the case (51) and can adjust the elastic force of the drive belt (53).

[0072] The first support roller (54) may be provided in the case (51) with a plurality of rollers facing each other in parallel. The first support roller (54) can adjust the elastic force by sliding toward each other on the outer side where the drive belt (53) rotates.

[0073] For example, the first support roller (54) is provided with a first guide groove (511) in the case (51) that supports the horizontal movement of the roller (541), and the roller pin (542) of the roller (541) can be inserted into the first guide groove (511) and fixed with a bolt (B1).

[0074] The second support roller (55) is provided horizontally parallel to the upper side of the first support roller (54) and can slide vertically to be in close contact with the lower outer periphery of the molded product (Ft).

[0075] Additionally, the second support roller (55) is provided horizontally in parallel with the case (51) and slides vertically to adjust the elasticity of the drive belt (53).

[0076] The second support roller (55) may be provided in the case (51) with a plurality of rollers facing each other in parallel. The second support roller (55) can adjust the elastic force by sliding toward each other on the inner side where the drive belt (53) rotates.

[0077] For example, the second support roller (55) is provided with a second guide groove (512) in the case (51) that supports the horizontal movement of the roller (551), and the roller pin (552) of the roller (551) can be inserted into the second guide groove (512) and fixed with a bolt (B1).

[0078] Accordingly, the molding product rotation unit (50) can rotate the molded product (Ft) discharged from the fourth mold (34) in one direction to induce twisting, thereby improving durability and allowing for smooth molding to improve aesthetics.

[0079] According to another embodiment of the mold device for molding a double injection color cone hanger of the present invention, the tension of the drive belt is adjusted by a support roller to evenly distribute the force applied to the molded product, thereby preventing asymmetric stress concentration during molding and stably maintaining the shape of the final product. Furthermore, the molded product (color cone hanger) formed according to each mold can cause cracking and breakage of the product due to fatigue accumulation caused by repeated load and stress changes through many processes, as indicated by the fatigue life curve (SN curve). However, by rotating the molded product at a smooth and constant speed through a molded product rotation unit, fatigue failure caused by repeated stress changes can be prevented, thereby ensuring durability.

[0080] The above description is merely an illustrative explanation of the technical concept of the present embodiment, and a person skilled in the art to which the present embodiment belongs will be able to make various modifications and variations within the scope of the essential characteristics of the present embodiment.

[0081] Accordingly, these embodiments are intended to explain, not limit, the technical concept of the embodiments, and the scope of the technical concept of the embodiments is not limited by these embodiments. The scope of protection of the embodiments shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the embodiments. Explanation of the symbols

[0083] 10: First extruder 20: Second extruder 30: Mold part 40: Cooling section 50: Molded product rotation unit

Claims

Claim 1 A mold device for molding a double injection color cone hanger, characterized by comprising: a first hopper and a second hopper into which a first resin and a second resin are respectively fed; a first extruder that receives the first resin from the first hopper and plasticizes the resin into a molten state using heating and shear stress; a second extruder that receives the second resin from the second hopper and plasticizes the resin into a molten state using heating and shear stress; and a mold part that sequentially receives the first resin and the second resin from the first extruder and the second extruder and supplies the second resin onto a preform molded in the first resin to complete a molded product having horizontal lines formed thereon. Claim 2 A mold device for molding a double injection color cone hanger according to claim 1, wherein the mold part comprises: a first mold having a branching hole formed therein for branching the first resin into a plurality of branches; a second mold including a first molding hole through which a preform formed through the branching hole corresponding to the branching hole passes to be molded into a shape pre-set by a user; and a third mold including a second molding hole that controls the thickness of the preform discharged from the first molding hole and connects the branched preforms to each other. Claim 3 A mold device for molding a double injection color cone hanger according to claim 2, wherein the first molding hole comprises a groove projection whose outer circumference protrudes toward the central axis of the second mold and a groove formed in the same direction as the groove projection toward the central axis of the second mold. Claim 4 A mold device for molding a double injection color cone hanger according to claim 2, wherein the mold part comprises a third molding hole through which a preform discharged from the second molding hole passes, and a fourth mold including a resin supply path that receives the second resin from the second extruder and supplies the second resin to a plurality of resin discharge ports that supply the second resin to the third molding hole. Claim 5 A mold device for molding a double injection color cone hanger, characterized in that, in claim 1, it includes a molded product rotation unit that rotates the molded product formed in the mold part in one direction. Claim 6 A mold device for molding a double injection color cone hanger, characterized in that, in claim 5, the molding rotation unit comprises: a case; a drive motor provided in the case; a drive belt that receives driving force from the drive motor, contacts the lower outer periphery of the molding, and rotates the molding in a circumferential direction; and a first support roller that slides parallel to each other in a horizontal direction within the case and adjusts the elastic force of the drive belt. Claim 7 A mold device for molding a double injection color cone hanger, characterized in that, in claim 6, the molding product rotation unit comprises a second support roller that is provided horizontally parallel to the upper side of the first support roller and slides vertically to be in close contact with the outer periphery of the molding product.

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