Resin zipper injection molding apparatus and method

Abstract

The application relates to the technical field of zipper manufacturing, and provides resin zipper injection equipment and a method, which comprises an injection table and an injection machine arranged on the injection table; a material guide hose is arranged at the discharging end of the injection machine; an injection head is arranged at the end of the material guide hose far from the injection machine; a frame body capable of vibrating and used for placing a zipper forming die is arranged on the injection table; a capsule and a plurality of heating plates are arranged on the inner side of the frame body; a heat conducting oil agent cavity filled with heat conducting oil agent is arranged in the injection table; a circulating pump is arranged at the lower part of the heat conducting oil agent cavity; an oil inlet hose in communication between the circulating pump and the capsule is arranged; an oil outlet hose in communication between the heat conducting oil agent cavity and the capsule is arranged; the zipper forming die is heated to ensure the fluidity of hot melt resin plastic during injection, and meanwhile, the zipper forming die is vibrated to make the hot melt resin plastic sufficiently flow and fill every corner of the die cavity, so that defects or cavities of the zipper product are avoided.

Description

Technical Field

[0001] This invention relates to the field of zipper manufacturing technology, specifically to a resin zipper injection molding equipment and method. Background Technology

[0002] With the rapid development of the apparel industry, the demand for zippers, as an important accessory for clothing, is increasing day by day. Resin zippers, as a new type of zipper, have been widely welcomed by the market due to their bright colors, wear resistance, corrosion resistance and other excellent properties.

[0003] Resin zippers are typically manufactured using injection molding. The injection molding machine injects hot-melt resin plastic into the zipper mold. After the resin plastic cools and solidifies, the mold is opened and the zipper is removed. During injection molding, the low temperature of the inner wall of the zipper mold cavity affects the fluidity of the hot-melt resin plastic. In addition, the zipper itself has a small structure and many details, which may cause the resin plastic to not completely fill every corner of the cavity, resulting in defects or voids in the zipper product.

[0004] Therefore, the present invention proposes a resin zipper injection molding equipment and method to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a resin zipper injection molding equipment and method to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A resin zipper injection molding device includes an injection molding table and an injection molding machine mounted on the injection molding table. The injection molding machine has a guide hose at its discharge end and an injection head at the end of the guide hose away from the injection molding machine. The injection molding table has a vibrating frame for placing the zipper forming mold. The inner side of the frame has a bladder and several heating plates. Each heating plate has multiple heat-conducting columns that are sealed and penetrate the bladder wall. The injection molding table has an oil chamber filled with heat-conducting oil, and the oil chamber has several heating elements for heating the heat-conducting oil. A circulation pump is located at the bottom of the oil chamber. An oil inlet hose is connected between the circulation pump and the bladder, and an oil outlet hose is connected between the oil chamber and the bladder.

[0007] In one alternative: a base plate is provided on the injection molding platform, and a slidable support member is mounted on the base plate via a sliding groove, and the frame is mounted on the support member.

[0008] In one alternative embodiment: a drive mechanism for realizing frame vibration is further provided. The drive mechanism includes a turntable rotatably mounted on the base plate, a tapered tube inserted into the top side of the oil chamber and gradually narrowing from top to bottom, and a rotating rod rotatably mounted inside the oil chamber. The turntable is circumferentially provided with a plurality of striking balls that can alternately strike the frame when the turntable rotates. Elastic members are provided between the support member and the groove walls at both ends of the chute. The end of the oil outlet hose away from the bladder is connected to the upper end of the tapered tube. The rotating rod is circumferentially provided with a plurality of impact plates to withstand the impact of the returning heat-conducting oil to drive the rotating rod to rotate. A transmission member is provided between the rotating rod and the turntable.

[0009] In one alternative: the frame is provided with an oil pump for pumping the heat-conducting oil in the bladder back into the oil chamber, and an oil guide hose is provided between the oil pump and the oil chamber.

[0010] In one alternative: the frame is equipped with a pressure sensor for monitoring the internal pressure of the bladder. When the circulating pump injects heat-conducting oil into the bladder to make it expand, the pressure sensor monitors the internal pressure of the bladder. When the pressure sensor detects that the pressure has reached a set value, it controls the circulating pump to stop.

[0011] In one alternative: the sidewall of the oil chamber is provided with a heat-insulating interlayer.

[0012] A resin zipper injection molding method, using the resin zipper injection molding equipment described in any of the above technical solutions, includes the following steps: S1: The heat transfer oil is heated to the target temperature by the heating element; S2: After the zipper forming mold is closed, it is placed in the frame and the injection head is connected to the injection port of the mold. Then, the circulation pump is started to inject heat-conducting oil into the bladder to make it expand. At this time, the oil outlet hose is kept closed. The expansion of the bladder causes multiple heating plates to move towards the center of the frame. When multiple heating plates are in contact with the zipper forming mold, the oil outlet hose is unobstructed. The circulation pump continues to deliver heat-conducting oil into the bladder. The heat-conducting oil returns to the oil chamber through the oil outlet hose, thus forming a dynamic balance of heat-conducting oil inside the bladder. S3: The heat in the heat-conducting oil is transferred to the heating plate through the heat-conducting column, and then transferred to the zipper forming mold to heat the mold. The hot melted resin plastic is injected into the zipper forming mold by the injection molding machine. During the injection process, the frame vibrates and drives the zipper forming mold to vibrate. After the injection is completed, the zipper forming mold is removed from the frame and left to cool and solidify.

[0013] Compared with the prior art, the beneficial effects of the embodiments of the present invention are as follows: During zipper injection molding, heat from the heat-conducting oil is transferred to the heating plate via heat-conducting pillars, and then to the zipper molding die to heat the die. The frame vibrates, which in turn drives the zipper molding die to vibrate. Heating the hot zipper molding die ensures the fluidity of the hot-melt resin plastic during injection. At the same time, the vibration of the zipper molding die itself allows the hot-melt resin plastic to flow fully and fill every corner of the die cavity, preventing defects or voids in the zipper product.

[0014] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Furthermore, these drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 This is a top sectional view of the frame, the bladder, and the multiple heating plates in this invention.

[0018] Figure 3 This is a schematic diagram showing the arrangement of the frame, the bladder, and the multiple heating plates in this invention.

[0019] Figure 4 This is a schematic diagram showing another angle arrangement between the frame, the bladder, and the multiple heating plates in this invention.

[0020] Figure 5 for Figure 1 Enlarged view of point A in the middle.

[0021] Figure 6 This is a partial schematic diagram of the drive mechanism in this invention.

[0022] Figure reference numerals: 1-Injection stage, 2-Heating element, 3-Oil chamber, 4-Drive mechanism, 401-Conical tube, 402-Turntable, 403-Striking ball, 404-Rotating rod, 405-Impact plate, 406-Transmission element, 407-Elastic element, 5-Base plate, 6-Frame, 7-Injection molding machine, 8-Feed guide hose, 9-Injection head, 10-Oil pump, 11-Oil inlet hose, 12-Circulation pump, 13-Bag, 14-Heat conduction column, 15-Heating plate, 16-Pressure sensor, 17-Oil outlet hose, 18-Groove, 19-Supporting element. Detailed Implementation

[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0025] Please see Figures 1-4 A resin zipper injection molding device includes an injection table 1 and an injection molding machine 7 mounted on the injection table 1. The injection molding machine 7 has a guide hose 8 at its discharge end and an injection head 9 at the end of the guide hose 8 away from the injection molding machine 7. The injection table 1 has a vibrating frame 6 for placing the zipper forming mold. The frame 6 has a bladder 13 and several heating plates 15 inside. Each heating plate 15 has multiple heat-conducting columns 14 that are sealed and penetrate the bladder wall of the bladder 13. The injection table 1 has an oil chamber 3 filled with heat-conducting oil, and the oil chamber 3 has several heating elements 2 for heating the heat-conducting oil. The lower part of the oil chamber 3 has a circulation pump 12. The circulation pump 12 and the bladder 13 are connected by an oil inlet hose 11, and the oil chamber 3 and the bladder 13 are connected by an oil outlet hose 17.

[0026] It should be noted that the oil outlet hose 17 is equipped with a valve (not shown in the figure), and the heating element 2 is an electric heating tube, electromagnetic heater, etc., as long as it can heat the heat-conducting oil agent. This application does not limit it here. The injection molding machine 7 is the prior art, used to melt the resin plastic and inject it into the zipper forming mold.

[0027] The heat-conducting oil is heated to the target temperature by the heating element 2. After the zipper forming mold is closed, it is placed in the frame 6, and the injection head 9 is connected to the injection port of the mold. Then, the circulation pump 12 is started to inject heat-conducting oil into the bladder 13 to make it expand (the valve on the oil outlet hose 17 is closed when the bladder 13 is expanding). The expansion of the bladder 13 causes multiple heating plates 15 to move towards the center of the frame 6. After the multiple heating plates 15 are in contact with the zipper forming mold, the valve on the oil outlet hose 17 is opened, and the circulation pump 12 continues to deliver heat-conducting oil into the bladder 13. The heat-conducting oil then returns to the oil container through the oil outlet hose 17. In cavity 3, a dynamic balance of heat-conducting oil is formed inside the bladder 13. The heat in the heat-conducting oil is conducted to the heating plate 15 through the heat-conducting column 14, and then to the zipper forming mold to heat the mold. The hot-melt resin plastic is injected into the zipper forming mold by the injection molding machine 7. During the injection process, the frame 6 vibrates, which drives the zipper forming mold to vibrate. Heating the zipper forming mold ensures the fluidity of the hot-melt resin plastic during injection. At the same time, the vibration of the zipper forming mold itself allows the hot-melt resin plastic to flow fully and fill every corner of the mold cavity, avoiding defects or voids in the zipper product.

[0028] Furthermore, the oil inlet hose 11, oil outlet hose 17, and feed hose 8 are all stainless steel hoses to ensure strength and durability.

[0029] Furthermore, the side wall of the oil chamber 3 is provided with a heat insulation layer (not shown in the figure), which not only prevents the operator from being burned by the side wall of the oil chamber 3, but also prevents the heat of the heat-conducting oil from being lost.

[0030] Furthermore, the frame 6 is equipped with a pressure sensor 16 for monitoring the internal pressure of the bladder 13. When the circulating pump 12 injects heat-conducting oil into the bladder 13 to cause it to expand, the pressure sensor 16 monitors the internal pressure of the bladder 13. When the pressure sensor 16 detects that the pressure has reached the set value, it controls the circulating pump 12 to stop. When the pressure sensor 16 detects that the pressure has reached the set value, it means that multiple heating plates 15 are pressed against the zipper forming mold with a certain pressure. At this time, the pressure sensor 16 feeds back a signal and controls the circulating pump 12 to stop. It will start running again after the valve on the oil outlet hose 17 is opened. The pressure sensor 16 is model MIK-P300. The control linkage technology between the pressure sensor 16 and the circulating pump 12 is a mature existing technology and there are no technical obstacles. Therefore, it will not be described in detail here.

[0031] Furthermore, the capsule 13 is made of a high-temperature resistant material, such as high-temperature glass fiber material, ceramic fiber material, etc., which is not limited here.

[0032] Please see Figure 1 , Figure 5 andFigure 6 In one embodiment of the present invention, the injection molding table 1 is provided with a base plate 5, and a slidable support member 19 is engaged on the base plate 5 through a sliding groove 18, and the frame 6 is disposed on the support member 19. A drive mechanism 4 for vibrating the frame 6 is also provided. The drive mechanism 4 includes a turntable 402 rotatably mounted on the base plate 5, a tapered tube 401 inserted into the top side of the oil cavity 3 and gradually narrowing from top to bottom, and a rotating rod 404 rotatably mounted inside the oil cavity 3. The turntable 402 is circumferentially provided with a plurality of striking balls 403 that can alternately strike the frame 6 when the turntable 402 rotates. Elastic members 407 are provided between the support member 19 and the groove walls at both ends of the slide groove 18. Preferably, The elastic element 407 is a rubber soft ball. The end of the oil outlet hose 17 away from the bladder 13 is connected to the upper end of the tapered tube 401. The rotating rod 404 is circumferentially provided with multiple impact plates 405 to withstand the impact of the returning heat transfer oil and drive the rotating rod 404 to rotate. A transmission element 406 is provided between the rotating rod 404 and the turntable 402 (the transmission element 406 includes a transmission structure composed of several transmission wheels, transmission chains or transmission belts, which is a mature existing technology and will not be described in detail here).

[0033] In this embodiment, the heat-conducting oil returned from the oil outlet hose 17 enters the tapered tube 401. Since the tapered tube 401 gradually narrows from top to bottom, the flow rate of the heat-conducting oil entering the tapered tube 401 is accelerated and impacts the impact plate 405, thereby driving the rotating rod 404 to rotate. Under the transmission action of the transmission component 406, the rotation of the rotating rod 404 drives the turntable 402 to rotate, causing multiple striking balls 403 to alternately strike the frame 6. Combined with the reset action of the elastic component 407, the frame 6 is vibrated, which in turn drives the zipper forming mold to vibrate during material injection.

[0034] Please see Figure 2 In one embodiment of the present invention, the frame 6 is provided with an oil pump 10 for pumping the heat-conducting oil in the bladder 13 back into the oil chamber 3, and an oil guide hose (not shown in the figure) is provided between the oil pump 10 and the oil chamber 3.

[0035] In this embodiment, after the injection of a zipper forming mold is completed, the heat-conducting oil in the bladder 13 is pumped back into the oil chamber 3 by the oil pump 10, causing the bladder 13 to shrink and desquamate. The shrinkage of the bladder 13 causes multiple heating plates 15 to detach from the zipper forming mold. At this time, the injection-molded zipper forming mold can be removed from the frame 6.

[0036] The present invention also provides a resin zipper injection molding method, using the resin zipper injection molding equipment described in any of the above technical solutions, comprising the following steps: S1: The heat transfer oil is heated to the target temperature by the heating element 2; S2: After the zipper forming mold is closed, it is placed in the frame 6 and the injection head 9 is connected to the injection port of the mold. Then, the circulation pump 12 is started to inject heat-conducting oil into the bladder 13 to make it expand. At this time, the oil outlet hose 17 is kept closed. The expansion of the bladder 13 causes multiple heating plates 15 to move towards the center of the frame 6. When multiple heating plates 15 are in contact with the zipper forming mold, the oil outlet hose 17 is unobstructed. The circulation pump 12 continues to deliver heat-conducting oil into the bladder 13. The heat-conducting oil returns to the oil chamber 3 through the oil outlet hose 17, thereby forming a dynamic balance of heat-conducting oil inside the bladder 13. S3: The heat in the heat-conducting oil is transferred to the heating plate 15 through the heat-conducting column 14, and then transferred to the zipper forming mold to heat the mold. The hot melted resin plastic is injected into the zipper forming mold through the injection molding machine 7. During the injection process, the frame 6 vibrates and drives the zipper forming mold to vibrate. After the injection is completed, the zipper forming mold is removed from the frame 6 and left to cool and solidify.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A resin zipper injection molding equipment, comprising an injection molding table (1) and an injection molding machine (7) disposed on the injection molding table (1), characterized in that, The injection molding machine (7) is provided with a guide hose (8) at the discharge end, and an injection head (9) is provided at the end of the guide hose (8) away from the injection molding machine (7). The injection table (1) is provided with a vibrating frame (6) for placing the zipper forming mold. The inner side of the frame (6) is provided with a bladder (13) and several heating plates (15). Each heating plate (15) is provided with multiple heat-conducting columns (14) that are sealed and penetrate the bladder wall of the bladder (13). The injection table (1) is provided with an oil chamber (3) filled with heat-conducting oil, and the oil chamber (3) is provided with several heating elements (2) for heating the heat-conducting oil. The lower part of the oil chamber (3) is provided with a circulation pump (12). The circulation pump (12) and the bladder (13) are connected by an oil inlet hose (11). The oil chamber (3) and the bladder (13) are connected by an oil outlet hose (17). The injection molding table (1) is provided with a base plate (5), and a sliding support (19) is provided on the base plate (5) through a sliding groove (18). The frame (6) is provided on the support (19). A drive mechanism (4) for vibrating the frame (6) is also provided. The drive mechanism (4) includes a turntable (402) rotatably mounted on the base plate (5), a tapered tube (401) inserted into the top side of the oil cavity (3) and gradually narrowing from top to bottom, and a rotating rod (404) rotatably mounted inside the oil cavity (3). The turntable (402) is provided with a plurality of striking balls (404) evenly arranged on its side circumferentially, which can alternately strike the frame (6) when the turntable (402) rotates. 3) Elastic elements (407) are provided between the support (19) and the groove walls at both ends of the slide (18). The end of the oil outlet hose (17) away from the bladder (13) is connected to the upper end of the tapered tube (401). Multiple impact plates (405) are evenly provided around the rotating rod (404) to withstand the impact of the returning heat transfer oil to drive the rotating rod (404) to rotate. A transmission element (406) is provided between the rotating rod (404) and the turntable (402).

2. The resin zipper injection molding equipment according to claim 1, characterized in that, The frame (6) is equipped with an oil pump (10) for pumping the heat-conducting oil in the bladder (13) back into the oil chamber (3), and an oil guide hose is provided between the oil pump (10) and the oil chamber (3).

3. The resin zipper injection molding equipment according to claim 1, characterized in that, The frame (6) is equipped with a pressure sensor (16) for monitoring the internal pressure of the bladder (13). When the circulating pump (12) injects heat-conducting oil into the bladder (13) to make it expand, the pressure sensor (16) monitors the internal pressure of the bladder (13). When the pressure sensor (16) detects that the pressure reaches the set value, it controls the circulating pump (12) to stop.

4. The resin zipper injection molding equipment according to claim 1, characterized in that, The oil chamber (3) has a heat insulation interlayer inside its side wall.

5. A resin zipper injection molding method, using the resin zipper injection molding equipment according to any one of claims 1-4, characterized in that, Includes the following steps: S1: Heat the heat transfer oil to the target temperature through the heating element (2); S2: After the zipper forming mold is closed, it is placed in the frame (6) and the injection head (9) is connected to the injection port of the mold. Then, the circulation pump (12) is started to inject heat-conducting oil into the bladder (13) to make it expand. At this time, the oil outlet hose (17) is kept closed. The expansion of the bladder (13) drives multiple heating plates (15) to move towards the center of the frame (6). When multiple heating plates (15) are in contact with the zipper forming mold, the oil outlet hose (17) is unobstructed. The circulation pump (12) continuously delivers heat-conducting oil into the bladder (13). The heat-conducting oil returns to the oil chamber (3) through the oil outlet hose (17), thereby forming a dynamic balance of heat-conducting oil inside the bladder (13). S3: The heat in the heat-conducting oil is conducted to the heating plate (15) through the heat-conducting column (14), and then to the zipper forming mold to heat the mold. The hot-melt resin plastic is injected into the zipper forming mold through the injection molding machine (7). During the injection process, the frame (6) vibrates and drives the zipper forming mold to vibrate. After the injection is completed, the zipper forming mold is removed from the frame (6) and left to cool and form.

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