A luggage drawbar injection molding device

Abstract

The present application discloses a luggage draw rod injection molding device, comprising a chassis, an upper mold and a lower mold that can be lifted and lowered and has a plurality of mold cavities. The lower mold is rotatably installed in the chassis through a flip control component. The bottom of the lower mold is provided with a plurality of holes connected to the mold cavities, and a shell is sleeved on the outside. A plurality of ejector rods are fixed in the shell, and the top of each ejector rod is clearance-matched with the holes. The shell is controlled by an ejection structure driven by a flip control component and is lifted and lowered relative to the lower mold. In daily use, by adopting the above technical solution, when the mold is separated, the flip control component controls the shell to rise relative to the lower mold, and each ejector rod ejects the luggage draw rod in the mold cavity, and then the flip control component controls the flipping of the lower mold and the shell. After the worker takes out the luggage draw rod from the cavity, the flip control component flips to make the lower mold and the shell flip back and reset, and then the shell descends relative to the lower mold, so that each ejector rod exits the mold cavity and completes the reset, which is convenient for the worker to take out the luggage draw rod in the cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of luggage drawbar molding, and in particular to a luggage drawbar injection molding device. Background Art

[0002] In the current luggage manufacturing industry, the production process of the drawbar system faces a common problem. As an important component of luggage, the production process of plastic drawbars involves injection molding. In this process, molten plastic material is injected into a mold of a specific shape. It needs to undergo a proper cooling process before it can be formed, and then demolding is performed to remove the luggage drawbar from the mold cavity.

[0003] The Chinese invention patent with publication number CN218227712U discloses a production and molding device for luggage tie rods: the production and molding device for luggage tie rods, through the cooperation of a lower mold, an upper mold, a bottom plate, a shell, a straight plate, a vertical tube, a vertical plate, a hydraulic cylinder, a horizontal plate, a plate body and a demoulding structure, so that when the device is in use, the horizontal bar can be pulled to the left to make the horizontal bar leave the groove of the vertical bar, and the spring drives the square plate to move upward, and the square plate drives the push rod to move upward, thereby pushing out the formed tie rod, making it convenient for staff to remove the tie rod after injection molding and facilitating staff operation. Although the arrangement of the push rod facilitates demoulding of the luggage tie rod formed in the mold cavity, it has the following defects:

[0004] The upper mold is located directly above the lower mold, and the mold cavity and push rod in the lower mold are both vertically set. When removing the luggage trolley from the mold cavity, the luggage trolley must be lifted upward, which is easy to touch the upper mold, making it difficult to remove the luggage trolley. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art.

[0006] The present application provides a luggage drawbar injection molding device, comprising a chassis, an upper mold and a lower mold with a plurality of mold cavities. The lower mold is rotatably installed in the chassis through a flip control component. The bottom of the lower mold is provided with a plurality of holes connecting the mold cavities, and an outer shell is sleeved on the outside. A plurality of ejector rods are fixed in the outer shell, and the top end of each ejector rod is matched with the clearance of each hole. The outer shell is controlled by an ejection structure driven by the flip control component to rise and fall relative to the lower mold.

[0007] The ejection structure includes an inner groove and an outer groove arranged on one side of the outer shell. The inner groove is connected to the middle of the outer groove, and the upper end of the outer groove is open. A rack 1 is provided on one side of the inner groove. A gear meshing with the rack 1 is rotatably installed on the side wall of the lower mold, and a rack 2 meshing with the gear is slidably installed in the outer groove. The flip control component controls the lifting and lowering of the rack 2.

[0008] There is a pair of rising and ejecting structures, which are respectively arranged on the left and right sides of the shell.

[0009] The flip control assembly includes a pair of rotating shafts symmetrically fixed on the left and right side walls of the lower mold. Each rotating shaft is rotatably connected to the side wall of the chassis through a bearing. A transmission column is fixed on each rack. A sliding frame is installed on the bottom of the inner cavity of the chassis through a cylinder. Transmission grooves are provided on both sides of the sliding frame, and each transmission column slides in cooperation with the corresponding transmission groove.

[0010] The sliding frame includes a U-shaped sliding frame and transmission plates fixed on the top of both ends of the sliding frame. The transmission grooves are respectively set on the transmission plates. The cylinder is fixed at the bottom of the chassis cavity, and the outer end of the piston is fixed to the inner wall of the sliding frame.

[0011] It also includes a pair of retaining columns symmetrically arranged on the left and right side walls of the lower mold, and a plurality of straight grooves parallel to each other are provided on the shell, which are respectively slidably matched with each rotating shaft and the retaining columns.

[0012] The transmission groove includes a vertical section and an inclined section, the lower end of the inclined section is connected with the upper end of the vertical section, and the upper end of the inclined section is inclined toward the transmission column.

[0013] A pair of fixed plates are fixed at the bottom of the inner cavity of the chassis, and each fixed plate is located between the two sides of the sliding frame and the adjacent surfaces of the lower mold. A limiting groove is fixed on each fixed plate, and each limiting groove includes an arc segment and a lifting segment. The lower end of the lifting segment is connected to the top of the arc segment, and the center of the arc segment is located on the axis of the rotating shaft. The transmission column is also slidably installed in the limiting groove.

[0014] It also includes a pair of fixed columns symmetrically arranged on the left and right side walls of the lower mold. Each fixed plate is provided with a fixed groove that slides with each fixed column. Each fixed groove includes a retaining section and an upright section. The retaining section is arc-shaped and the center of the circle is located on the axis of the rotating shaft. The upper end of the upright section is connected to the lower end of the retaining section.

[0015] A ring edge is provided on the top of the peripheral wall of the lower mold. When the outer shell rises relative to the lower mold and abuts against the ring edge, the bottom of the inner cavity abuts against the bottom surface of the lower mold.

[0016] The beneficial effects of the present invention are as follows:

[0017] After the upper mold is separated from the lower mold, the cylinder drives the sliding frame to slide backward, and the transmission column enters the connecting section from the inclined section of the transmission groove. The rack 1, the gear and the rack 2 move to make the shell rise relative to the lower mold, and the top surface of the shell presses against the bottom surface of the ring. Each ejector rod extends into the mold cavity to eject the luggage tie rods formed in each mold cavity. The cylinder continues to move, and the transmission column descends in the vertical section. At the same time, the lower mold and the shell are flipped around the axis of the rotating shaft, so that the top surface of the lower mold is tilted outward. Compared with the existing technology, when taking out the luggage tie rod from the mold cavity of the lower mold, the upper touch will not be touched, which is conducive to the removal operation of the luggage tie rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of the luggage drawbar injection molding device in an embodiment of the present application;

[0019] Figure 2 This is a cross-sectional view from the left side of the luggage drawbar injection molding device in the embodiment of the present application;

[0020] Figure 3 This is a cross-sectional view of the lower mold and the outer shell in the embodiment of the present application;

[0021] Figure 4 This is a left view of the lower mold and the housing in the embodiment of the present application;

[0022] Figure 5 This is the first state of coordination among the flip control assembly, ejection structure, lower mold and housing in the embodiment of the present application;

[0023] Figure 6 This is the second matching state of the flip control assembly, ejection structure, lower mold and housing in the embodiment of the present application;

[0024] Figure 7 This is the third matching state of the flip control component, ejection structure, lower mold and shell in the embodiment of the present application.

[0025] Reference numerals

[0026] 1-chassis, 2-upper die, 3-mold cavity, 4-lower die, 5-flip control assembly, 51-rotating shaft, 52-transmission column, 53-sliding frame, 531-sliding frame, 532-transmission plate, 54-transmission groove, 541-vertical section, 542-inclined section, 6-housing, 7-ejector rod, 8-ejection structure, 81-inner groove, 82-outer groove, 83-rack 1, 84-rack 2, 85-gear, 9-holding column, 10-straight groove, 11-ring edge, 12-fixed plate, 13-limiting groove, 131-arc section, 132-lifting section, 14-fixed column, 15-fixed groove, 151-holding section, 152-vertical section. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0028] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0029] The following describes in detail the luggage drawbar injection molding device provided in the embodiment of the present application through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0030] Example 1:

[0031] like Figures 1 to 7 As shown, an embodiment of the present application provides a luggage drawbar injection molding device, comprising a chassis 1, an upper mold 2 and a lower mold 4 with a plurality of mold cavities 3. The lower mold 4 is rotatably installed in the chassis 1 through a flip control component 5. The bottom of the lower mold 4 is provided with a plurality of holes connecting the mold cavities 3, and an outer shell 6 is sleeved on the outside. A plurality of ejector rods 7 are fixed in the outer shell 6, and the top of each ejector rod 7 is clearance-matched with each hole. The outer shell 6 is controlled by an ejection structure 8 driven by the flip control component 5 and rises and falls relative to the lower mold 4.

[0032] Due to the above structure, after the luggage tie rod in the cavity 3 of the lower mold 4 is cooled and formed, the upper mold 2 is separated from the lower mold 4 under the control of the corresponding cylinder. Then the flip control assembly 5 is operated to control the ejection structure 8 to move. The shell 6 rises relative to the lower mold 4, and each ejector rod 7 extends into the mold cavity 3 to eject the luggage tie rod in each mold cavity 3. As the flip control assembly 5 continues to operate, the lower mold 4 and the shell 6 are flipped in the chassis 1 until the top surface of the lower mold 4 tilts toward the outside of the chassis 1. The flip control assembly 5 stops operating, and the worker removes the formed luggage tie rod from the cavity 3 of the lower mold 4.

[0033] After all the luggage pull rods in each mold cavity 3 of the lower mold 4 are taken out, the flip control assembly 5 runs in the reverse direction to flip the lower mold 4 and the shell 6 in the chassis 1 until the top surface of the lower mold 4 is parallel to the bottom surface of the upper mold 2, and then drives the ejection structure 8 to control the shell 6 and each ejector rod 7 to descend, and each ejector rod 7 is separated from the corresponding cavity to complete the reset.

[0034] Example 2:

[0035] like Figures 1 to 3As shown, in this embodiment, in addition to the structural features of the aforementioned embodiments, the ejection structure 8 includes an inner groove 81 and an outer groove 82 arranged on one side of the outer shell 6, the inner groove 81 is connected to the middle of the outer groove 82, the upper end of the outer groove 82 is open, and a rack 1 83 is provided on one side of the inner groove 81. A gear 85 meshing with the rack 1 83 is rotatably mounted on the side wall of the lower mold 4, and a rack 2 84 meshing with the gear 85 is slidably mounted in the outer groove 82. The flip control component 5 controls the lifting and lowering of the rack 2 84.

[0036] In a specific embodiment of the present application, there is a pair of rising and ejecting structures 8 , which are respectively arranged on the left and right sides of the housing 6 .

[0037] Due to the adoption of the above structure, when the flip control assembly 5 is in operation, each rack 2 84 is controlled to be lowered / raised relative to the lower mold 4, and the corresponding rack 1 83 is driven to be raised / lowered through the corresponding gear 85, so that the housing 6 and each push rod 7 are raised / lowered.

[0038] Example 3:

[0039] like Figures 4 to 7 As shown, in this embodiment, in addition to the structural features of the aforementioned embodiments, the flip control assembly 5 includes a pair of rotating shafts 51 symmetrically fixed to the left and right side walls of the lower mold 4, each rotating shaft 51 is rotatably connected to the side wall of the chassis 1 through a bearing, and a transmission column 52 is fixed on each rack 83. A sliding frame 53 is slidably installed on the bottom of the inner cavity of the chassis 1 through a cylinder, and a transmission groove 54 is provided on both sides of the sliding frame 53. Each transmission column 52 slides in cooperation with the corresponding transmission groove 54.

[0040] In a specific embodiment of the present application, the sliding frame 53 includes a U-shaped sliding frame 531 and a transmission plate 532 fixed on the top of both ends of the sliding frame 531, and each transmission groove 54 is respectively arranged on each transmission plate 532. The cylinder is fixed at the bottom of the inner cavity of the chassis 1, and the outer end of the piston is fixed to the inner wall of the sliding frame 531.

[0041] In a specific embodiment of the present application, a pair of retaining columns 9 are symmetrically arranged on the left and right side walls of the lower mold 4, and a plurality of parallel straight grooves 10 are provided on the outer shell 6, which are respectively slidably matched with the retaining columns 9 on each rotating shaft 51.

[0042] In a specific embodiment of the present application, the transmission groove 54 includes a vertical section 541 and an inclined section 542 , the lower end of the inclined section 542 is connected to the upper end of the vertical section 541 , and the upper end of the inclined section 542 is inclined toward the transmission column 52 .

[0043] In a specific embodiment of the present application, a ring edge 11 is provided on the top of the peripheral wall of the lower mold 4. When the outer shell 6 rises relative to the lower mold 4 and abuts against the ring edge 11, the bottom of the inner cavity abuts against the bottom surface of the lower mold 4.

[0044] Due to the adoption of the above-mentioned structure, when unloading, the cylinder controls the sliding frame 531 to approach the rotating shaft 51, and the transmission column 52 slides from the upper end of the inclined section 542 to the vertical section 541, so that the transmission column 52 and the rack 1 84 descend, and the shell 6 rises until the rack 2 84 is tightly abutted against the lower end of the outer groove 82, and the transmission column 52 enters the upper end of the vertical section 541. As the sliding frame 531 continues to move, the transmission column 52 slides toward the lower end of the vertical section 541, and at the same time drives the shell 6 and the lower mold 4 to flip clockwise around the axis of the rotating shaft 51 until the transmission column 52 abuts against the lower end of the vertical section 541. At this time, the top surface of the lower mold 4 is inclined at a 45° angle toward the outside of the box.

[0045] The cylinder controls the sliding frame 531 to move away from the rotating shaft 51, and the transmission column 52 slides from the lower end of the vertical section 541 to the inclined section 542, and the transmission column 52 slides to the upper end of the vertical section 541, driving the shell 6 and the lower mold 4 to flip counterclockwise around the axis of the rotating shaft 51 until the transmission column 52 enters the lower end of the inclined section 542. At this time, the top surface of the lower mold 4 is parallel to the bottom surface of the upper mold 2. As the sliding frame 531 continues to move, the transmission column 52 and the rack 2 84 rise, and the shell 6 descends until the transmission column 52 is tightly pressed against the upper end of the inclined section 542, and each push rod 7 is separated from the corresponding mold cavity 3.

[0046] When the housing 6 is lifted or lowered relative to the lower die 4 , each rotating shaft 51 and each retaining column 9 slides in the corresponding straight groove 10 , thereby improving the stability of the housing 6 during the lifting or lowering.

[0047] Example 4:

[0048] like Figures 4 to 7 As shown, in this embodiment, in addition to the structural features of the aforementioned embodiments, a pair of fixed plates 12 are fixedly provided at the bottom of the inner cavity of the chassis 1, and each fixed plate 12 is respectively located between the two sides of the sliding frame 53 and the adjacent surfaces of the lower mold 4. A limiting groove 13 is fixed on each fixed plate 12, and each limiting groove 13 includes an arc segment 131 and a lifting segment 132. The lower end of the lifting segment 132 is connected to the top of the arc segment 131, and the center of the arc segment 131 is located on the axis of the rotating shaft 51. The transmission column 52 is slidably installed in the limiting groove 13 at the same time.

[0049] In a specific embodiment of the present application, it also includes a pair of fixed columns 14 symmetrically arranged on the left and right side walls of the lower mold 4, and each fixed plate 12 is provided with a fixed groove 15 that slides with each fixed column 14. Each fixed groove 15 includes a retaining section 151 and an upright section 152. The retaining section 151 is arc-shaped and the center of the circle is located on the axis of the rotating shaft 51. The upper end of the upright section 152 is connected to the lower end of the retaining section 151.

[0050] Due to the adoption of the above structure, when unloading, the cylinder controls the sliding frame 531 to approach the rotating shaft 51, and the transmission column 52 slides from the upper end of the inclined section 542 to the vertical section 541. The transmission column 52 simultaneously descends in the lifting section 132 until the lower end of the rack 2 84 is tightly pressed against the lower end of the outer groove 82, and the transmission column 52 enters the vertical section 541 and the arc section 131. At the same time, the fixed column 14 rises from the upright section 152 to the holding section 151. The sliding frame 531 continues to approach the rotating shaft 51. The transmission column 52 can only descend in the vertical section 541 and slide toward the lower end of the arc section 131. At the same time, the fixed column 14 slides toward the rear end of the holding section 151. In the process of the shell 6 and the lower mold 4 turning around the axis of the rotating shaft 51, it is ensured that the lower mold 4 and the shell 6 do not undergo relative displacement.

[0051] During reset, the cylinder controls the sliding frame 531 to move away from the rotating shaft 51, and the transmission column 52 slides upward from the lower end of the vertical section 541 while rising in the arc section 131 until the transmission column 52 enters the lifting section 132 and the inclined section 542, and the fixed column 14 enters the upright section 152. At this time, the lower mold 4 flips to the top surface parallel to the bottom surface of the upper mold 2, and the sliding frame 531 continues to move away from the rotating shaft 51. The transmission column 52 rises in the lifting section 132 and the inclined section 542, and the fixed column 14 descends in the upright section 152, and the shell 6 descends relative to the lower mold 4.

[0052] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0053] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A luggage drawbar injection molding device, comprising a chassis, an upper mold, and a lower mold with a plurality of mold cavities, characterized in that: The lower die is rotatably mounted in the chassis via a flip control assembly. A plurality of holes are provided at the bottom of the lower die, communicating with the respective die cavities. A housing is sleeved on the outer side of the lower die. A plurality of ejector pins are fixed in the housing. The tops of the ejector pins are clearance-matched with the respective holes. The housing is controlled by an ejection structure driven by the flip control assembly to rise and fall relative to the lower die. The ejection structure includes an inner groove and an outer groove provided on one side of the shell, the inner groove is connected to the middle of the outer groove, the upper end of the outer groove is open, a rack 1 is provided on one side of the inner groove, a gear meshing with the rack 1 is rotatably mounted on the side wall of the lower mold, a lifting block is slidably mounted in the outer groove, one side of the lifting block meshes with the gear through the rack 2, and the flip control component controls the lifting and lowering of the rack 2; The flip control assembly includes a pair of rotating shafts symmetrically fixed to the left and right side walls of the lower mold, each rotating shaft is rotatably connected to the side wall of the chassis through a bearing, a transmission column is fixed on the second rack, and a sliding frame is slidably mounted on the bottom of the chassis cavity through a cylinder, and transmission grooves are provided on both sides of the sliding frame, and the transmission columns slide in cooperation with the corresponding transmission grooves; The transmission groove includes a vertical section and an inclined section, the lower end of the inclined section is connected to the upper end of the vertical section, and the upper end of the inclined section is inclined toward the transmission column; The cylinder controls the sliding frame to approach the rotating shaft, and the transmission column slides from the upper end of the inclined section to the vertical section, causing the transmission column and rack 2 to descend, and the outer shell to rise until rack 2 is tightly against the lower end of the outer groove, and the transmission column enters the upper end of the vertical section. As the sliding frame continues to move, the transmission column slides to the lower end of the vertical section, and at the same time drives the outer shell and the lower mold to flip around the axis of the rotating shaft.

2. The luggage drawbar injection molding device according to claim 1, characterized in that: There is a pair of rising and ejecting structures, which are respectively arranged on the left and right sides of the shell.

3. The luggage drawbar injection molding device according to claim 2, characterized in that: The sliding frame includes a U-shaped sliding frame and transmission plates fixed on the top of both ends of the sliding frame, each transmission groove is respectively set on each transmission plate, the cylinder is fixed on the bottom of the chassis cavity, and the outer end of the piston is fixed to the inner wall of the sliding frame.

4. The luggage drawbar injection molding device according to claim 3, characterized in that: It also includes a pair of retaining columns symmetrically arranged on the left and right side walls of the lower mold, and a plurality of straight grooves parallel to each other are provided on the shell, which are respectively slidably matched with each rotating shaft and the retaining columns.

5. The luggage drawbar injection molding device according to claim 4, characterized in that: A pair of fixed plates are fixedly provided at the bottom of the inner cavity of the chassis, and each fixed plate is respectively located between the two sides of the sliding frame and the adjacent surfaces of the lower mold. A limiting groove is fixed on each fixed plate, and each limiting groove includes an arc segment and a lifting segment. The lower end of the lifting segment is connected to the top of the arc segment, and the center of the arc segment is located on the axis of the rotating shaft. The transmission column is also slidably installed in the limiting groove.

6. The luggage drawbar injection molding device according to claim 5, characterized in that: It also includes a pair of fixed columns symmetrically arranged on the left and right side walls of the lower mold. Each fixed plate is provided with a fixed groove that slides with each fixed column. Each fixed groove includes a retaining section and an upright section. The retaining section is arc-shaped and the center of the circle is located on the axis of the rotating shaft. The upper end of the upright section is connected to the lower end of the retaining section.

7. The luggage drawbar injection molding device according to claim 6, characterized in that: A ring edge is provided on the top of the peripheral wall of the lower mold. When the outer shell rises relative to the lower mold and abuts against the ring edge, the bottom of the inner cavity abuts against the bottom surface of the lower mold.

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