Luggage pull rod injection molding device

Abstract

The luggage pull rod injection molding device comprises a machine case, an upper mold and a liftable lower mold with a plurality of mold cavities, the lower mold is rotationally installed in the machine case through a turnover control assembly, the bottom of the lower mold is provided with a plurality of holes communicating with the mold cavities, the outer side of the lower mold is sleeved with a shell, a plurality of ejector rods are fixedly arranged in the shell, and the top ends of the ejector rods are in clearance fit with the holes; the shell is controlled by the ejection structure driven by the turnover control assembly and ascends and descends relative to the lower die, in daily use, by the adoption of the technical scheme, when the die is split, the turnover control assembly controls the shell to ascend relative to the lower die, all the ejection rods eject a luggage pull rod in the die cavity out, then the turnover control assembly controls the lower die and the shell to turn over, and the lower die is opened. After a worker takes out the luggage pull rod in the cavity, the turnover control assembly turns over to enable the lower die and the shell to reversely turn over and reset, then the shell descends relative to the lower die, all the ejector rods exit from the die cavity to complete resetting, and the worker can conveniently take out the luggage pull rod in the cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of luggage handle forming, and particularly relates to an injection molding device for luggage handles. Background Art

[0002] In the current luggage manufacturing industry, the production process of the handle system faces a common problem. As an important component of luggage, the production process of plastic handles involves injection molding. In this process, molten plastic material is injected into a mold with a specific shape and needs to go through an appropriate cooling process to form, and then demolding is carried out to take out the luggage handle in the mold cavity.

[0003] A Chinese invention patent with the publication number CN218227712U, a luggage handle production and forming device, discloses that: through the cooperation of a lower mold, an upper mold, a bottom plate, a housing, a straight plate, a vertical cylinder, a vertical plate, a hydraulic cylinder, a cross plate, a plate body and a demolding structure, when the device is in use, by pulling the cross bar to the left, the cross bar can be made to leave the groove of the vertical bar, and the first spring drives the square plate to move upward, and the square plate drives the push rod to move upward, thereby pushing out the formed handle, which is convenient for the staff to take out the handle after injection molding and is convenient for the staff to operate. Although the setting of the push rod facilitates the demolding of the formed luggage handle in the mold cavity, its existing defect is that:

[0004] The upper mold is located directly above the lower mold, and the mold cavity and the push rod in the lower mold are both vertically arranged. When taking out the luggage handle from the mold cavity, the luggage handle needs to be lifted upward, which is likely to touch the upper mold and is not conducive to the operation of taking out the luggage handle. 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 an injection molding device for luggage handles, including a machine case, an upper mold, and a lower mold that can be lifted and has a plurality of mold cavities. The lower mold is rotationally installed in the machine case through a flipping control component. The bottom of the lower mold is provided with a plurality of holes communicating with each mold cavity, and an outer shell is sleeved outside. A plurality of ejector rods are fixed in the outer shell, and the top ends of each ejector rod are in clearance fit with each hole. The outer shell is controlled by an ejection structure driven by the flipping control component to move up and down 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 middle parts of the inner groove and the outer groove are communicated, and the upper end of the outer groove is open. A first rack is arranged on one side of the inner groove. A gear meshing with the first rack is rotationally installed on the side wall of the lower mold. A second rack meshing with the gear is slidably installed in the outer groove. The flipping control component controls the lifting of the second rack.

[0008] There are a pair of upward ejection structures, which are respectively arranged on the left and right sides of the outer shell.

[0009] The flipping control component includes a pair of rotating shafts symmetrically and fixedly connected to the left and right side walls of the lower mold. Each rotating shaft is rotatably connected to the side wall of the machine case through a bearing. A transmission column is fixedly provided on each rack one. The bottom of the inner cavity of the machine case is slidably provided with a sliding frame through a cylinder. Transmission grooves are provided on both sides of the sliding frame, and each transmission column is slidably matched with the corresponding transmission groove.

[0010] The sliding frame includes a U-shaped sliding frame and transmission plates fixedly provided at the top ends of both ends of the sliding frame. Each transmission groove is respectively provided on each transmission plate. The cylinder is fixedly provided at the bottom of the inner cavity of the machine case, and the outer end of the piston is fixedly connected to the inner side wall of the sliding frame.

[0011] It also includes a pair of holding columns symmetrically arranged on the left and right side walls of the lower mold. A plurality of parallel straight grooves are provided on the outer shell, and each rotating shaft and the holding column are slidably matched.

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

[0013] A pair of fixing plates are fixedly provided at the bottom of the inner cavity of the machine case. Each fixing plate is respectively located between the adjacent surfaces of the sliding frame on both sides and the lower mold. A limiting groove is fixedly provided on each fixing plate. Each limiting groove includes an arc section and a lifting section. The lower end of the lifting section is communicated with the top end of the arc section. The center of the arc section is located on the axis of the rotating shaft, and the transmission column is simultaneously slidably installed in the limiting groove.

[0014] It also includes a pair of fixing columns symmetrically arranged on the left and right side walls of the lower mold. Fixing grooves slidably matched with the respective fixing columns are provided on each fixing plate. Each fixing groove includes a holding section and an upright section. The holding section is circular 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 communicated with the lower end of the holding section.

[0015] A ring edge is provided at 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 lower mold is separated from the lower mold, the cylinder drives the sliding frame to slide backward. The transmission column enters the connecting section from the inclined section of the transmission groove. The first rack, the gear and the second rack act, so that the outer shell rises relative to the upper mold. The top surface of the outer shell abuts against the bottom surface of the ring edge. Each ejector rod extends into the mold cavity to eject the formed luggage pull rods in each mold cavity. The cylinder continues to act. The transmission column descends in the vertical section. At the same time, the lower mold and the outer shell rotate around the axis of the rotating shaft, so that the top surface of the lower mold inclines outwards. Compared with the prior art, when taking out the luggage pull rod from the mold cavity of the lower mold, it will not touch the upper mold, which is beneficial to the operation of taking out the luggage pull rod. Description of the Drawings

[0018] Figure 1 It is the front view of the luggage pull rod injection molding device in the embodiment of the present application;

[0019] Figure 2 It is a left - view cross - sectional view of the injection - molding device for luggage pull rods in the embodiment of the present application;

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

[0021] Figure 4 It is a left - view of the lower mold and the outer shell in the embodiment of the present application;

[0022] Figure 5 It is the first state of the cooperation of the flipping control component, the ejecting structure, the lower mold and the outer shell in the embodiment of the present application;

[0023] Figure 6 It is the second state of the cooperation of the flipping control component, the ejecting structure, the lower mold and the outer shell in the embodiment of the present application;

[0024] Figure 7 It is the third state of the cooperation of the flipping control component, the ejecting structure, the lower mold and the outer shell in the embodiment of the present application.

[0025] Reference numerals

[0026] 1 - chassis, 2 - upper mold, 3 - mold cavity, 4 - lower mold, 5 - flipping control component, 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 - outer shell, 7 - ejector rod, 8 - ejecting structure, 81 - inner groove, 82 - outer groove, 83 - first rack, 84 - second rack, 85 - gear, 9 - holding column, 10 - straight groove, 11 - ring edge, 12 - fixing plate, 13 - limiting groove, 131 - arc section, 132 - lifting section, 14 - fixing column, 15 - fixing groove, 151 - holding section, 152 - upright section. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of them. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0028] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0029] The following will combine the accompanying drawings and through specific embodiments and their application scenarios, the injection molding device for luggage pull rods provided by the embodiments of this application will be described in detail.

[0030] Embodiment 1:

[0031] As Figures 1 to 7 shown, the embodiment of this application provides an injection molding device for luggage pull rods, including a machine case 1, an upper mold 2, and a lower mold 4 that can be lifted and lowered and has a plurality of mold cavities 3. The lower mold 4 is rotatably installed in the machine case 1 through a flipping control assembly 5. A plurality of holes communicating with each mold cavity 3 are provided at the bottom of the lower mold 4, and an outer shell 6 is sleeved outside. A plurality of ejector rods 7 are fixedly arranged in the outer shell 6. The top ends of the ejector rods 7 are in clearance fit with the holes. The outer shell 6 is controlled by an ejection structure 8 driven by the flipping control assembly 5 and moves up and down relative to the lower mold 4.

[0032] Due to the above structure, after the luggage pull rods in the mold cavities 3 of the lower mold 4 are cooled and formed, the upper mold 2 is separated from the lower mold 4 under the control of the corresponding cylinder, and then the flipping control assembly 5 operates to control the ejection structure 8 to act. The outer shell 6 rises relative to the lower mold 4, and each ejector rod 7 extends into the mold cavity 3 to eject the luggage pull rods in each mold cavity 3. As the flipping control assembly 5 continues to operate, both the lower mold 4 and the outer shell 6 flip in the machine case 1 until the top surface of the lower mold 4 is inclined towards the outside of the machine case 1, and the flipping control assembly 5 stops operating. The worker takes out the formed luggage pull rods from the mold cavities 3 of the lower mold 4;

[0033] After all the luggage pull rods in the mold cavities 3 of the lower mold 4 are taken out, the flipping control assembly 5 runs in the reverse direction to flip the lower mold 4 and the outer shell 6 in the machine case 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 outer shell 6 and each ejector rod 7 to descend, and each ejector rod 7 disengages from the corresponding cavity to complete the reset.

[0034] Embodiment 2:

[0035] As Figures 1 to 3As shown, in this embodiment, in addition to including the structural features of the foregoing embodiment, the ejection structure 8 includes an inner groove 81 and an outer groove 82 provided on one side of the outer shell 6. The middle parts of the inner groove 81 and the outer groove 82 are communicated, the upper end of the outer groove 82 is open, a first rack 83 is provided on one side of the inner groove 81, a gear 85 meshing with the first rack 83 is rotatably installed on the side wall of the lower die 4, a second rack 84 meshing with the gear 85 is slidably installed in the outer groove 82, and the flipping control assembly 5 controls the lifting of the second rack 84.

[0036] In a specific embodiment of the present application, there are a pair of upward ejection structures 8, which are respectively arranged on the left and right sides of the outer shell 6.

[0037] Due to the adoption of the above structure, when the flipping control assembly 5 operates, it controls each second rack 84 to descend / ascend relative to the lower die 4, drives the corresponding second rack 84 to ascend / descend through the corresponding gear 85, and makes the outer shell 6 and each ejector rod 7 ascend / descend.

[0038] Embodiment 3:

[0039] As Figures 4 to 7 shown, in this embodiment, in addition to including the structural features of the foregoing embodiment, the flipping control assembly 5 includes a pair of rotating shafts 51 symmetrically fixed on the left and right side walls of the lower die 4. Each rotating shaft 51 is rotatably connected to the side wall of the chassis 1 through a bearing. A transmission column 52 is fixed on each first rack 83. A sliding frame 53 is slidably installed at the bottom of the inner cavity of the chassis 1 through a cylinder. Transmission grooves 54 are provided on both sides of the sliding frame 53, and each transmission column 52 is slidably matched 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 transmission plates 532 fixed on the tops of both ends of the sliding frame 531. 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 side wall of the sliding frame 531.

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

[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 communicated with the upper end of the vertical section 541, and the upper end of the inclined section 542 inclines towards the transmission column 52.

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

[0044] Due to the above structure, during blanking, the air cylinder controls the sliding frame 531 to approach the rotating shaft 51. The transmission column 52 slides from the upper end of the inclined section 542 to the vertical section 541, causing the transmission column 52 and the second rack 84 to descend, and the outer shell 6 to rise until the second rack 84 abuts against the lower end of the outer groove 82. 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 towards the lower end of the vertical section 541, simultaneously driving the outer shell 6 and the lower die 4 to rotate 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 die 4 is inclined outward at 45° to the outside of the box body.

[0045] The air cylinder controls the sliding frame 531 to move away from the rotating shaft 51. The transmission column 52 slides from the lower end of the vertical section 541 to the inclined section 542. The transmission column 52 slides towards the upper end of the vertical section 541, driving the outer shell 6 and the lower die 4 to rotate 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 die 4 is parallel to the bottom surface of the upper die 2. As the sliding frame 531 continues to move, the transmission column 52 and the second rack 84 rise, and the outer shell 6 descends until the transmission column 52 abuts tightly against the upper end of the inclined section 542, and each ejector rod 7 disengages from the corresponding die cavity 3.

[0046] When the outer shell 6 moves up and down relative to the lower die 4, each rotating shaft 51 and each holding column 9 slide in the corresponding straight grooves 10, improving the stability of the outer shell 6 during its up and down movement.

[0047] Embodiment 4:

[0048] As Figures 4 to 7 shown, in this embodiment, in addition to including the structural features of the foregoing embodiment, a pair of fixing plates 12 are fixedly provided at the bottom of the inner cavity of the chassis 1. Each fixing plate 12 is respectively located between the adjacent surfaces of the two sides of the sliding frame 53 and the lower die 4. A limiting groove 13 is fixedly provided on each fixing plate 12. Each limiting groove 13 includes an arc section 131 and a lifting section 132. The lower end of the lifting section 132 is communicated with the top end of the arc section 131. The center of the arc section 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, a pair of fixing columns 14 symmetrically arranged on the left and right side walls of the lower die 4 are further included. A fixing groove 15 slidably matched with each fixing column 14 is provided on each fixing plate 12. Each fixing groove 15 includes a holding section 151 and an upright section 152. The holding 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 communicated with the lower end of the holding section 151.

[0050] Due to the above structure, during blanking, the air cylinder controls the sliding frame 531 to approach the rotating shaft 51. The transmission column 52 slides from the upper end of the inclined section 542 to the vertical section 541, and at the same time, the transmission column 52 descends in the lifting section 132 until the lower end of the second rack 84 abuts against the lower end of the outer groove 82. 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 at the same time slide towards the lower end of the arc section 131. At the same time, the fixed column 14 slides towards the rear end of the holding section 151. During the process of the outer shell 6 and the lower die 4 flipping around the axis of the rotating shaft 51, it is ensured that there is no relative displacement between the lower die 4 and the outer shell 6;

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

[0052] It should be noted that in this text, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including that element. In addition, it should be pointed out 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 reverse order according to the functions involved. For example, the described methods 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 have been described above with reference to the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A luggage drawbar 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, characterized in that: 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 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 matched with the gap of each hole. The shell is controlled by an ejection structure driven by the flip control component to rise and fall relative to the lower mold.

2. A luggage drawbar injection molding device according to claim 1, characterized in that: The ejection structure includes an inner groove and an outer groove arranged 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 installed on the side wall of the lower mold, a lifting block is slidably installed in the outer groove, one side of the lifting block is meshed with the gear through the rack 2, and the flip control component controls the lifting and lowering of the rack 2.

3. The luggage drawbar injection molding device according to claim 2, 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.

4. The luggage drawbar injection molding device according to claim 3, characterized in that: 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 box shell through a bearing, a transmission column is fixed on each rack, a sliding frame is slidably installed on the bottom of the inner cavity of the box shell through a cylinder, and transmission grooves are provided on both sides of the sliding frame, and each transmission column slides in cooperation with the corresponding transmission groove.

5. The luggage drawbar injection molding device according to claim 3, 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 arranged on each transmission plate, the cylinder is fixed at the bottom of the inner cavity of the chassis, and the outer end of the piston is fixedly connected to the inner wall of the sliding frame.

6. The luggage drawbar injection molding device according to claim 4, 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 the outer shell is provided with a plurality of straight grooves parallel to each other, which are respectively slidably matched with each rotating shaft and the retaining columns.

7. The luggage drawbar injection molding device according to claim 4, characterized in that: The transmission groove comprises 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.

8. 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 fixedly provided 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 slidably installed in the limiting groove at the same time.

9. The luggage drawbar injection molding device according to claim 8, 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.

10. The luggage drawbar injection molding device according to claim 1, characterized in that: A ring edge is arranged on the top of the peripheral wall of the lower mold. When the outer shell rises relative to the lower mold to be pressed against the ring edge, the bottom of the inner cavity is pressed against the bottom surface of the lower mold.

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