Rotary high-pressure shoe material injection molding machine

Abstract

The application discloses a rotary disc type high-pressure combined die shoe material injection molding machine, which comprises a base and a rotary disc matched with the base, a plurality of die cushion plates for supporting dies are placed on the rotary disc, and at least two groups of production stations are sequentially arranged in the rotary direction of the rotary disc; each group of production stations comprises a material injection station, a cooling section and a die opening station which are sequentially arranged in the rotary direction of the rotary disc; a top beam is arranged above the rotary disc, each material injection station is located between the lower side of one end of the top beam and the upper side of the rotary disc, and the end of the top beam is connected with the base through a stand column; a die lifting mechanism for simultaneously lifting the die cushion plates and the dies is arranged below the material injection station, and at least two injection heads corresponding to the feeding ports of the top surfaces of the lifted dies are arranged on the top beam. The rotary disc type high-pressure combined die shoe material injection molding machine provided by the application can simultaneously produce shoe materials of different colors, has a small floor area, high production efficiency and uniform stress when each die is simultaneously combined and material injection.

Description

Technical Field

[0001] This invention relates to the field of shoe material production, and in particular to a rotary high-pressure molded shoe material injection molding machine. Background Technology

[0002] A shoe material injection molding machine is a device that forms shoe materials by injecting material into a shoe material mold. After the material is injected into the inner cavity of the shoe material mold through the injection head, the mold needs to be cooled first to allow the material inside the mold to gradually solidify before the mold can be opened and the material discharged. Traditional rotary injection molding machines are equipped with only one injection head and one set of production stations in the direction of rotation of the rotary table. During production, only one color of material can be injected for the same set of molds, thus limiting the production of shoe materials to a single color. Currently, some shoe manufacturers that need to produce shoe materials of the same shape but different colors must use two mold-jointing shoe material injection molding machines to maintain production continuity, resulting in high equipment purchase and maintenance costs. If only one mold-jointing shoe material injection molding machine is used, different colors of material need to be injected into the injection head hopper of that machine in turn, leading to low production efficiency.

[0003] Secondly, the injection time of the mold is short, but the cooling time required after injection is long. Traditional shoe material injection molding machines only have a single injection station and a single cooling station on the production station. In order to ensure that the mold cooling time of the cooling station reaches the set time, there will be a waiting time after each injection, which will not be able to take advantage of the speed of the injection head and thus reduce production efficiency.

[0004] In addition, with the increasing hardness of new shoe materials, the requirements for mold closing pressure are gradually increasing. However, the mold closing force of traditional rotary shoe material injection molding machines cannot meet the requirements, which will result in poor dimensional accuracy of the molded products. Summary of the Invention

[0005] The purpose of this invention is to provide a rotary high-pressure mold-closing shoe material injection molding machine, which can produce shoe materials of different colors at the same time, with a small footprint, high production efficiency, and uniform force when each mold closes and injects material at the same time.

[0006] To achieve the above objectives, the present invention provides a rotary high-pressure mold-forming shoe material injection molding machine, comprising a base and a rotary table that rotates with the base. Multiple mold pads for supporting molds are placed on the rotary table. The machine also includes at least two sets of production stations arranged sequentially around the rotation direction of the rotary table. Each set of production stations includes an injection station, a cooling section, and a mold opening station arranged sequentially around the rotation direction of the rotary table. A top beam is provided above the rotary table. Each injection station is located between the bottom of one end of the top beam and the top of the rotary table. The end of the top beam is connected to the base via a column. A mold lifting mechanism is provided below the injection station for simultaneously lifting the mold pads and the molds. At least two injection heads are provided on the top beam, each corresponding to a feed port on the top surface of the lifted mold.

[0007] As a further improvement of the present invention, a mold limiting plate is provided at the bottom of the top beam above each injection station. The mold limiting plate is provided with a material conveying hole that runs vertically through the mold. The upper end of the material conveying hole is connected to the injection port of the injection head, and the lower end of the material conveying hole corresponds to the feed port on the top surface of the mold.

[0008] As a further improvement of the present invention, the portion of the turntable used to place the mold pad is provided with a hollow portion; the mold lifting mechanism fixing portion is installed on the base, and the lifting portion of the mold lifting mechanism corresponds vertically to the hollow portion rotated to the injection station.

[0009] As a further improvement of the present invention, the cooling section includes at least two cooling stations, each of which is arranged sequentially around the rotation direction of the turntable; each of the cooling stations is provided with a cooling mechanism corresponding to the mold that rotates to the cooling station.

[0010] As a further improvement of the present invention, the cooling mechanism includes a mounting frame, a lifting mechanism and a cooling plate connected in sequence, the cooling plate being located directly above the cooling station, and the mounting frame being fixed relative to the base.

[0011] As a further improvement of the present invention, the cooling plate is provided with a first coolant channel, and the outer wall of the cooling plate is provided with a first coolant inlet and a first coolant outlet respectively connected to both ends of the first coolant channel.

[0012] Beneficial effects Compared with the prior art, the advantages of the rotary high-pressure mold-closing shoe material injection molding machine of the present invention are as follows: 1. This shoe material injection molding machine includes at least two sets of production stations arranged sequentially around the rotation direction of the turntable. Each production station is equipped with an injection head, allowing for the simultaneous production of at least two shoe materials of the same shape but different colors. During this process, there is no need to change the material color in the hopper of each injection head, making operation convenient and production efficiency high. Due to the small number of required equipment, equipment purchase and maintenance costs are significantly reduced, and the total space occupied by the equipment is small. Furthermore, because the molds at each production line's injection station can be simultaneously lifted upwards by the mold lifting mechanism and pressed against the top beam, the base, column, and top beam experience uniform stress when the lifted molds inject material through their respective injection heads, reducing deformation and extending the equipment's service life, further reducing equipment maintenance costs.

[0013] 2. Compared to the traditional method where the injection head injects material from the side inlet of the mold, this method allows the injection head to inject material into the inlet on the top surface of the mold through the material conveying hole of the mold limiting plate on the top beam. This allows the injection head to be closer to the center of the equipment, further reducing the equipment's footprint. It also eliminates the need to move the injection head to avoid interference between the mold and the injection head when the turntable rotates, resulting in a simpler structure.

[0014] 3. The cooling section includes at least two cooling stations, which are arranged sequentially around the rotation direction of the turntable. This allows the same mold to be continuously cooled by two adjacent cooling plates as the turntable rotates intermittently. This ensures the cooling time of the mold and allows the injection head to inject material into the next mold without having to wait for the mold to cool down for a long time, thus greatly improving production efficiency.

[0015] The invention will become clearer from the following description, taken in conjunction with the accompanying drawings, which are used to explain embodiments of the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A 3D view of a rotary high-pressure molded shoe material injection molding machine; Figure 2 A three-dimensional view of a rotary high-pressure molded shoe material injection molding machine without the injection head; Figure 3 for Figure 2 Top view; Figure 4 for Figure 2 The main view; Figure 5 A three-dimensional view of the cooling mechanism; Figure 6 This is a 3D view of the mold. Detailed Implementation

[0018] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0019] Example Specific embodiments of the present invention are as follows: Figures 1 to 6 As shown, a rotary high-pressure mold-forming shoe material injection molding machine includes a base 2 and a rotary table 1 that rotates with it. The rotational engagement between the rotary table 1 and the base 2 can be the same as that in CN220499839U. Multiple mold pads 6 for supporting molds 8 are placed on the rotary table 1 along its rotation path. It also includes two sets of production stations arranged sequentially around the rotation direction of the rotary table 1. The production stations are relatively stationary with respect to the base 2 and do not rotate with the rotary table 1. Each set of production stations includes an injection station 20, a cooling section, and a mold opening station 23 arranged sequentially around the rotation direction of the rotary table 1. A top beam 3 is provided above the rotary table 1. Each injection station 20 is located between the bottom of one end of the top beam 3 and the top of the rotary table 1. The end of the top beam 3 is connected to the base 2 via a column 31. Below the injection station 20 is a mold lifting mechanism 4 for simultaneously lifting the mold pads 6 and the molds 8 upwards. The mold lifting mechanism 4 can be a hydraulic telescopic cylinder. The top beam 3 is equipped with two injection heads 7 that correspond one-to-one with the feed ports 80 on the top surface of each mold 8 that is lifted in the injection station 20. The injection heads 7 are located at the front end of the entire injection device.

[0020] like Figure 6 As shown, the mold 8 includes an upper mold and a lower mold that are hinged to each other. The top surface of the upper mold of the mold 8 is provided with a feed port 80, which is connected to the inner cavity of the mold 8.

[0021] Each injection station 20 has a horizontally arranged mold limiting plate 32 installed at the bottom of the top beam 3. The mold limiting plate 32 has a vertically penetrating feed hole 33 in the middle. The upper end of the feed hole 33 is connected to the injection port of the injection head 7, and the lower end of the feed hole 33 corresponds to the feed inlet 80 on the top surface of the mold 8 rotated to the injection station 20. After the mold 8 is lifted upward and the top surface of the upper mold contacts the bottom surface of the mold limiting plate 32, the feed inlet 80 of the mold 8 is connected to the feed hole 33 of the mold limiting plate 32. The two are sealed by a sealing ring, which is installed on the outer edge of one of them.

[0022] The portion of the turntable 1 used to place the mold base plate 6 is provided with a hollow section 24, and the front and rear sides of the mold base plate 6 are respectively placed above the edges of the hollow section 24. The mold lifting mechanism 4 is fixed on the base 2, and the lifting part of the mold lifting mechanism 4 corresponds vertically to the hollow section 24 that rotates to the injection station 20. When the lifting part of the mold lifting mechanism 4 is raised upward, it can pass through the hollow section 24 of the turntable 1 and lift the mold base plate 6 vertically upward. At this time, the mold 8 above the mold base plate 6 is lifted together with the mold base plate 6.

[0023] The cooling section includes two cooling stations, namely the first cooling station 21 and the second cooling station 22, which are arranged sequentially around the rotation direction of the turntable 1, as follows: Figure 3 As shown. Each cooling station is equipped with a cooling mechanism 5 corresponding to the mold 8 that rotates to that cooling station.

[0024] The cooling mechanism 5 includes a mounting frame 53, a lifting mechanism 52, and a horizontally arranged cooling plate 51 connected in sequence. The cooling plate 51 is located directly above the cooling station. The mounting frame 53 is fixed relative to the base 2. In this embodiment, the mounting frame 53 is fixedly connected to the top beam 3. The lifting mechanism 52 adopts a telescopic hydraulic cylinder. The top of the cooling plate 51 is also connected to a lifting guide rod 54. The lifting guide rod 54 slides in cooperation with the guide cylinder set on the mounting frame 53 to play a guiding role.

[0025] The cooling plate 51 has a first coolant channel inside, and a first coolant inlet and a first coolant outlet connected to both ends of the first coolant channel on the outer wall of the cooling plate 51. When the cooling plate 51 contacts the top surface of the mold 8, the heat of the mold 8 is conducted to the cooling plate 51 and then carried away by the coolant, thus cooling the mold 8.

[0026] The mold pad 6 has a second coolant channel inside, and a second coolant inlet and a second coolant outlet connected to both ends of the second coolant channel on its outer wall. A vertically arranged rotating cylinder 9 is movably mounted on the base 2. The rotation axes of the rotating cylinder 9 and the turntable 1 coincide and are relatively fixed. The rotating cylinder 9 has a cooling water chamber and a return water chamber. The outlet 91 of the cooling water chamber of the rotating cylinder 9 is connected to the second coolant inlet of each mold pad 6 via a first flexible hose, and the second coolant outlet of each mold pad 6 is connected to the inlet 92 of the return water chamber of the rotating cylinder 9 via a second flexible hose. The hoses are long enough to ensure that the mold pad 6 does not shift when it is lifted upwards by the mold lifting mechanism 4. During production, coolant is continuously supplied to each mold pad 6 to maintain cooling of the mold 8.

[0027] At mold opening station 23, mold opening can be performed manually or by a mold opening mechanism. The mold opening mechanism can adopt a structure as disclosed in CN224028354U. When performing the mold opening operation and pulling up the upper mold, to prevent the lower mold of mold 8 from being pulled up along with the upper mold, a lower mold locking device as shown in CN224028351U can be used. To prevent significant displacement of the mold pad 6 relative to the turntable 1 during lifting and lowering, a limiting structure between the mold and the turntable as shown in CN224028351U can be used.

[0028] The workflow of the rotary high-pressure mold-forming shoe material injection molding machine in this embodiment is as follows: Step 1: First, put materials of different colors into the hoppers of the two injection devices, and place the mold 8 on the upper surface of the mold pad 6 of the turntable 1. Step 2: Start turntable 1. Turntable 1 will begin to rotate intermittently relative to the base plate 2 around its own axis of rotation.

[0029] Step 3: The two molds 8 at the injection station 20 are located at the two farthest ends of the turntable 1. Both molds are lifted upward by the lifting part of the mold lifting mechanism 4 below them along with the mold pad 6. The top surfaces of the two molds 8 are pressed against the lower surfaces of the mold limiting plates 32 at both ends of the top beam 3. The upper and lower sides of the molds 8 are pressurized to ensure the stability of the mold closing. Then the injection head 7 injects liquid material into the mold 6.

[0030] Step 4: After each injection head 7 completes the injection of a single mold 8, the lifting part of the mold lifting mechanism 4 descends, allowing the mold 8 and the mold pad 6 to fall back onto the turntable 1.

[0031] Step 5: After injection, the mold 8 rotates to the first cooling station 21. The cooling plate 51 of the first cooling station 21 descends and adheres to the top surface of the mold 8 for initial cooling, and the shoe material inside the mold 8 gradually cools and solidifies. After cooling is complete, the cooling plate 51 rises again. During this process, the injection head 7 simultaneously injects material into the next mold 8.

[0032] Step 6: After the first cooling, mold 8 rotates to the second cooling station 22. The cooling plate 51 of the second cooling station 22 descends and adheres to the top surface of mold 8 for cooling, further cooling and solidifying the shoe material inside mold 8. After cooling is complete, the cooling plate 51 is raised again. Simultaneously, mold 8, which completed the injection in the previous step, undergoes its first cooling at the first cooling station 21, while the injection head 7 synchronously injects material into the next mold 8.

[0033] Step 7: After the second cooling, the mold 8 rotates with the turntable 1 to the mold opening station 23. After the mold 8 is opened, the personnel take out the shoe material inside the mold 8, clean the inner cavity of the mold 8, and then close the mold again to prepare the mold 8 to enter the next production station.

[0034] In addition to the above embodiments, the number of production stations arranged sequentially around the rotation direction of turntable 1 can also be three or more; the cooling section can also be set with three or more cooling stations according to the required cooling temperature and time requirements.

[0035] The present invention has been described above in conjunction with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations made in accordance with the essence of the present invention.

Claims

1. A rotary high-pressure mold-forming shoe material injection molding machine, comprising a base (2) and a rotary table (1) rotatably cooperating therewith, wherein a plurality of mold pads (6) for supporting molds (8) are placed on the rotary table (1), characterized in that, It also includes at least two sets of production stations arranged sequentially around the rotation direction of the turntable (1). Each set of production stations includes an injection station (20), a cooling section and a mold opening station (23) arranged sequentially around the rotation direction of the turntable (1). A top beam (3) is provided above the turntable (1). Each injection station (20) is located between the bottom of one end of the top beam (3) and the top of the turntable (1). The end of the top beam (3) is connected to the base (2) through a column (31). A mold lifting mechanism (4) is provided below the injection station (20) for simultaneously lifting the mold pad (6) and the mold (8). At least two injection heads (7) are provided on the top beam (3) that correspond one-to-one with the inlet (80) on the top surface of each mold (8) being lifted.

2. The rotary high-pressure mold-closing shoe material injection molding machine according to claim 1, characterized in that, Each of the above injection stations (20) has a mold limiting plate (32) at the bottom of the top beam (3). The mold limiting plate (32) has a material conveying hole (33) that runs vertically through it. The upper end of the material conveying hole (33) is connected to the injection port of the injection head (7), and the lower end of the material conveying hole (33) corresponds to the feed port (80) on the top surface of the mold (8).

3. A rotary high-pressure mold-forming machine for shoe materials according to claim 1 or 2, characterized in that, The portion of the turntable (1) used to place the mold pad (6) is provided with a hollow part (24); the mold lifting mechanism (4) fixing part is installed on the base (2), and the lifting part of the mold lifting mechanism (4) corresponds vertically to the hollow part (24) that rotates to the injection station (20).

4. The rotary high-pressure mold-closing shoe material injection molding machine according to claim 1, characterized in that, The cooling section includes at least two cooling stations, each arranged sequentially around the rotation direction of the turntable (1); each cooling station is provided with a cooling mechanism (5) corresponding to the mold (8) that rotates to the cooling station.

5. A rotary high-pressure mold-forming machine for shoe materials according to claim 4, characterized in that, The cooling mechanism (5) includes a mounting bracket (53), a lifting mechanism (52) and a cooling plate (51) connected in sequence. The cooling plate (51) is located directly above the cooling station, and the mounting bracket (53) is fixed relative to the base (2).

6. A rotary high-pressure mold-closing shoe material injection molding machine according to claim 5, characterized in that, The cooling plate (51) is provided with a first coolant channel, and the outer wall of the cooling plate (51) is provided with a first coolant inlet and a first coolant outlet that are respectively connected to both ends of the first coolant channel.

7. A rotary high-pressure mold-forming machine for shoe materials according to claim 1, characterized in that, The mold pad (6) is provided with a second coolant channel, and the outer wall of the mold pad (6) is provided with a second coolant inlet and a second coolant outlet that are respectively connected to the two ends of the second coolant channel.

8. A rotary high-pressure mold-closing shoe material injection molding machine according to claim 1, characterized in that, The base (2) is provided with a rotating cylinder (9). The rotation axes of the rotating cylinder (9) and the turntable (1) coincide and are fixed relative to each other. The rotating cylinder (9) is provided with a cooling water chamber and a return water chamber. The cooling water chamber of the rotating cylinder (9) is connected to the second coolant inlet of each mold pad (6) through a first hose. The second coolant outlet of each mold pad (6) is connected to the return water chamber of the rotating cylinder (9) through a second hose.

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