Rotary pusher plate two-color milk powder cap injection molding equipment and its control method

Abstract

This invention discloses a rotary pusher-type two-color milk powder cap injection molding equipment and its control method, belonging to the field of milk powder cap production and processing technology. The rotary pusher-type two-color milk powder cap injection molding equipment includes: a first housing, a second housing containing a front mold core, the second housing being movably disposed to the right of the first housing, and a rear mold core containing a rear mold core. The front mold core includes two molding stations, one of which is located in the lower half of the front mold core, and the other molding station is located in the lower half of the front mold core, with the two molding stations arranged centrally symmetrically; an ejection mechanism, disposed in the first housing and connected to the front mold core, for ejecting the front mold core, the molded two-color milk powder cap, and the soft rubber nozzle; and a rotation mechanism, disposed in the first housing and connected to the front mold core, for rotating the front mold core after it is ejected to the right, thereby exchanging the positions of the two molding stations.

Description

Technical Field

[0001] This invention relates to the field of milk powder cap production and processing technology, and in particular to a rotary pusher plate two-color milk powder cap injection molding equipment and its control method. Background Technology

[0002] A dual-color milk powder cap typically refers to a design with two materials: a hard outer layer and a soft inner layer. This design combines the characteristics of both materials to ensure both functionality and comfort. The hard outer layer provides protection and structural support, while the soft inner layer offers comfort and a better seal.

[0003] Currently, the production of two-color milk powder caps typically requires two injection molding processes. The mold closes for the first time, and the first set of injection nozzles sprays out plastic material to complete the injection. The mold then separates, and a robotic arm adjusts the mold's orientation or rotates the entire mold to close it again. The second set of injection nozzles then sprays out plastic material to complete the second injection. The mold then separates again, and the material is unloaded, completing one two-color injection molding process. This type of injection molding machine is huge, and the mold needs to open and close twice to complete one injection, resulting in low production efficiency. Summary of the Invention

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a rotary pusher plate two-color milk powder cap injection molding equipment and its control method, which can efficiently complete the injection molding production of two-color milk powder caps.

[0005] According to a first aspect of the present invention, a rotary pusher-type two-color milk powder cap injection molding equipment includes: a first housing, a front mold core disposed within the first housing, a second housing disposed movably to the right side of the first housing, a rear mold core disposed within the second housing, the front mold core and the rear mold core together forming a molding cavity for molding a two-color milk powder cap, the front mold core including two molding stations, one molding station disposed in the lower half of the front mold core and the other molding station disposed in the lower half of the front mold core, the two molding stations being centrally symmetrically arranged; and a soft rubber hot runner, the soft rubber hot runner passing through the first housing. Inside the housing, a soft rubber hot runner is connected to the molding station located in the upper half of the front mold core; a hard rubber hot runner passes through the first housing and is connected to the molding station located in the lower half of the front mold core; an ejection mechanism is located in the first housing and connected to the front mold core, and is used to eject the front mold core, the molded two-color milk powder cap, and the soft rubber nozzle; a rotation mechanism is located in the first housing and connected to the front mold core, and is used to rotate the front mold core after it is ejected to the right, so that the positions of the two molding stations are interchanged.

[0006] The rotary pusher-type two-color milk powder cap injection molding equipment according to embodiments of the present invention has at least the following beneficial effects: This rotary pusher-type two-color milk powder cap injection molding equipment, by setting an ejection mechanism, ejects the front mold core loaded with the finished and semi-finished two-color milk powder caps, allowing the rotation mechanism to rotate the front mold core 180° independently, thereby rotating the semi-finished two-color milk powder cap, which has already undergone hard plastic injection molding, to the soft plastic injection area. Compared to existing two-color injection molding equipment, which requires additional robotic arms to assist rotation or the entire mold to rotate, this rotary pusher-type two-color milk powder cap injection molding equipment has a simpler structure and occupies a smaller volume.

[0007] According to some embodiments of the present invention, a water circulation mechanism is also included, which is disposed in the first housing and the front mold core, and is used for cooling during the injection molding process.

[0008] According to some embodiments of the present invention, the rotating mechanism comprises: a rotating shaft rotatably disposed within a first housing, one end of the rotating shaft being connected to a front mold core, and a bushing movable along the axial direction of the rotating shaft being disposed at the other end of the rotating shaft, the bushing being provided with a gear; and a first hydraulic cylinder disposed on the housing, the output shaft of the first hydraulic cylinder being provided with a rack, the gear cooperating with the rack to drive the rotating shaft to rotate.

[0009] According to some embodiments of the present invention, the ejection mechanism includes a second hydraulic cylinder, which is disposed on the housing. The output shaft of the second hydraulic cylinder is connected to a slider, which is connected to the end of the rotating shaft away from the front mold core. The hydraulic cylinder drives the slider to slide left and right, and the slider drives the front mold core to move back and forth through the rotating shaft.

[0010] According to some embodiments of the present invention, the water circulation mechanism includes a first water path and a second water path, the first water path being disposed in the slider and the second water path being disposed in the rotating shaft.

[0011] According to some embodiments of the present invention, the first water channel and the second water channel are connected through an annular interface, so that the cooling water can always be circulated when the front mold core rotates.

[0012] According to some embodiments of the present invention, sealing rings are provided on both sides of the annular interface.

[0013] According to some embodiments of the present invention, the drive mechanism further includes a third hydraulic cylinder and a ejector pin. The third hydraulic cylinder is disposed in the first housing, and the third hydraulic cylinder ejects the soft rubber nozzle through the ejector pin.

[0014] According to some embodiments of the present invention, the soft hot runner and the hard hot runner are arranged perpendicular to each other.

[0015] A control method for a rotary pusher-type two-color milk powder cap injection molding equipment according to a second aspect of the present invention includes:

[0016] Hard rubber raw materials and soft rubber raw materials are added to the corresponding equipment hoppers using a feeder;

[0017] The mold is closed for injection molding. Hard plastic is injected into the molding station of the lower half of the front mold core, and soft plastic is injected into the molding station of the upper half of the front mold core.

[0018] Opening the mold separates the first shell from the second shell, which in turn separates the front mold core from the rear mold core.

[0019] The second and third oil cylinders operate simultaneously to eject the front mold core, and eject the two-color milk powder cap and soft rubber nozzle formed on the upper part of the front mold core. The robotic arm takes out the two-color milk powder cap and soft rubber nozzle located on the upper part of the front mold core and ejects them.

[0020] The first hydraulic cylinder drives the front mold core to rotate 180°, and the second and third hydraulic cylinders operate to reset the ejector pin and the front mold core, and then the mold is closed again for injection molding.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is a schematic diagram of the structure of the rotary pusher plate dual-color milk powder cap injection molding equipment according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the mold opening structure of the rotary pusher plate dual-color milk powder cap injection molding equipment according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the front mold core of the rotary pusher plate dual-color milk powder cap injection molding equipment according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the rotating mold core of the rotary pusher plate dual-color milk powder cap injection molding equipment according to an embodiment of the present invention;

[0027] Figure 5 This is an internal schematic diagram of the rotary pusher plate dual-color milk powder cap injection molding equipment according to an embodiment of the present invention;

[0028] Figure 6 yes Figure 5 Schematic diagram of the middle slider and rotating shaft;

[0029] Figure 7 yes Figure 6 A schematic diagram of the structure of the rotating shaft.

[0030] Explanation of reference numerals in the attached figures:

[0031] First shell 100; front mold core 110; molding station 111;

[0032] Second shell 200; rear mold core 210;

[0033] Second hydraulic cylinder 310; slider 320; third hydraulic cylinder 330; ejector pin 340;

[0034] Rotating shaft 410; bushing 420; gear 430; first hydraulic cylinder 440; rack 450;

[0035] First water channel 510; Second water channel 520; Annular interface 530; Sealing ring 550. Detailed Implementation

[0036] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0037] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not 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 limiting this invention.

[0038] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0039] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0040] refer to Figures 1 to 7 This invention describes a rotary pusher-type two-color milk powder cap injection molding equipment and its control method according to embodiments of the present invention.

[0041] like Figures 1 to 7As shown, the rotary pusher two-color milk powder cap injection molding equipment according to an embodiment of the present invention includes: a first housing 100, a front mold core 110 disposed inside the first housing 100; a second housing 200, the second housing 200 being movably disposed to the right side of the first housing 100; a rear mold core 210 disposed inside the second housing 200; the front mold core 110 and the rear mold core 210 together form a molding cavity for molding the two-color milk powder cap; the front mold core 110 includes two molding stations 111, one molding station 111 being disposed in the lower half of the front mold core 110, and the other molding station 111 being disposed in the lower half of the front mold core 110, the two molding stations 111 being centrally symmetrically arranged; and a soft rubber hot runner, through which the soft rubber hot runner is installed. Within the first housing 100, a soft rubber hot runner is connected to the molding station 111 located in the upper half of the front mold core 110; a hard rubber hot runner is disposed within the first housing 100 and is connected to the molding station 111 located in the lower half of the front mold core 110; an ejection mechanism is disposed within the first housing 100 and connected to the front mold core 110, and is used to eject the front mold core 110, the molded two-color milk powder cap, and the soft rubber nozzle; a rotation mechanism is disposed within the first housing 100 and connected to the front mold core 110, and is used to rotate the front mold core 110 after it is ejected to the right, thereby exchanging the positions of the two molding stations 111.

[0042] like Figures 5 to 7As shown, it also includes a water circulation mechanism, which passes through the first housing 100 and the front mold core 110. The water circulation mechanism is used for cooling during the injection molding process. The rotating mechanism includes: a rotating shaft 410, which is rotatably disposed within the first housing 100. One end of the rotating shaft 410 is connected to the front mold core 110, and the other end of the rotating shaft 410 is provided with a bushing 420 that can move axially along the rotating shaft 410. A gear 430 is provided on the bushing 420; and a first hydraulic cylinder 440, which is disposed on the housing. A rack 450 is provided on the output shaft of the first hydraulic cylinder 440. The gear 430 and the rack 450 cooperate to drive the rotating shaft 410 to rotate. The ejection mechanism includes a second hydraulic cylinder 310, which is mounted on the housing. The output shaft of the second hydraulic cylinder 310 is connected to a slider 320, which is connected to the end of the rotating shaft 410 furthest from the front mold core 110. The hydraulic cylinder drives the slider 320 to slide left and right, and the slider 320 drives the front mold core 110 to move back and forth via the rotating shaft 410. The water circulation mechanism includes a first water channel 510 and a second water channel 520. The first water channel 510 is located in the slider 320, and the second water channel 520 is located in the rotating shaft 410. The first water channel 510 and the second water channel 520 are connected through an annular interface 530, ensuring continuous cooling water circulation when the front mold core 110 rotates. Sealing rings 550 are provided on both sides of the annular interface 530. The drive mechanism also includes a third hydraulic cylinder 330 and an ejector pin 340. The third hydraulic cylinder 330 is located inside the first housing 100, and the third hydraulic cylinder 330 ejects the soft rubber nozzle via the ejector pin 340. The soft hot runner and the hard hot runner are set perpendicular to each other.

[0043] like Figures 1 to 7 As shown, the control method of the rotary pusher plate two-color milk powder cap injection molding equipment according to an embodiment of the present invention includes:

[0044] Hard rubber raw materials and soft rubber raw materials are added to the corresponding equipment hoppers using a feeder;

[0045] The mold is closed for injection molding. Hard plastic is injected into the molding station 111 of the lower half of the front mold core 110, and soft plastic is injected into the molding station 111 of the upper half of the front mold core 110.

[0046] The mold opening separates the first shell 100 from the second shell 200, which in turn causes the front mold core 110 to separate from the rear mold core 210.

[0047] The second hydraulic cylinder 310 and the third hydraulic cylinder 330 operate simultaneously to eject the front mold core 110 and eject the two-color milk powder cap and soft rubber nozzle formed on the upper part of the front mold core 110. The robotic arm takes out the two-color milk powder cap and soft rubber nozzle located on and ejected from the upper part of the front mold core 110.

[0048] The first hydraulic cylinder 440 drives the front mold core 110 to rotate 180°. The second hydraulic cylinder 310 and the third hydraulic cylinder 330 operate to reset the ejector pin 340 and the front mold core 110, and then the mold is closed again for injection molding.

[0049] This rotary pusher-type two-color milk powder cap injection molding machine uses an ejection mechanism to push out the front mold core 110, which contains both finished and semi-finished two-color milk powder caps. This allows the rotation mechanism to rotate the front mold core 110 independently by 180°, thus transferring the semi-finished two-color milk powder cap, which has already undergone hard plastic injection molding, to the soft plastic injection area. Compared to existing two-color injection molding machines that require additional robotic arms or rotation of the entire mold, this rotary pusher-type two-color milk powder cap injection molding machine has a simpler structure and occupies a smaller volume. Furthermore, the soft plastic hot runner and hard plastic hot runner do not rotate with the front mold core 110, allowing them to be arranged perpendicularly to each other and avoiding each other, further reducing the overall size of the machine.

[0050] The second hydraulic cylinder 310 drives the slider 320 to move left and right, thereby driving the rotating shaft 410 connected to the slider 320 to move left and right, and finally driving the front mold core 110 to move left and right. The rotating shaft 410 is equipped with a bushing 420, and the bushing 420 is equipped with a gear 430. The first hydraulic cylinder 440 drives the rack 450 to move up and down, thereby driving the gear 430 to rotate, which in turn drives the rotating shaft 410 to rotate. Since the bushing 420 can move left and right relative to the rotating shaft 410, the rotation of the front mold core 110 by the rotating mechanism and the left and right translation of the front mold core 110 driven by the ejection mechanism do not affect each other.

[0051] The water circulation mechanism is arranged along the slider 320, the rotating shaft 410, and the front mold core 110. Since the slider 320 and the rotating shaft 410 will rotate relative to each other, an annular interface 530 is provided at the junction of the slider 320 and the rotating shaft 410. The annular interface 530 connects the first water passage 510 in the slider 320 and the second water passage 520 in the rotating shaft 410, thereby ensuring that the first water passage 510 and the second water passage 520 are always connected when the front mold core 110 rotates, ensuring that cooling water circulation is maintained throughout the injection molding process. Sealing rings 550 are provided on both sides of the annular interface 530. The sealing rings 550 ensure the sealing of the connection between the first water passage 510 and the second water passage 520, provided that the rotating shaft 410 can rotate relative to the slider 320.

[0052] The following is a specific production and processing example illustrating this rotary pusher plate two-color milk powder cap injection molding equipment and its control method:

[0053] First, add 96.15% PP material and 3.85% pearlescent gold pigment to the mixer and stir for 5 minutes to ensure the materials and pigments are evenly mixed. Then, add 96.15% TPE material and 3.85% green pigment to the mixer and stir for 5 minutes to ensure the materials and pigments are evenly mixed. Finally, add the mixed pearlescent gold PP material to the main nozzle hopper via a feeder, and add the green TPE material to the auxiliary nozzle hopper via a feeder.

[0054] The first housing 100 and the second housing 200 are assembled and the locking shank is injection molded. At the molding station 111 of the upper part of the front mold core 110, a semi-finished two-color milk powder cap with a hard plastic injection-molded portion is present. Soft plastic is injected into the molding station 111 of the upper part of the front mold core 110, and hard plastic is injected into the molding station 111 of the lower part of the front mold core 110. At this time, the finished two-color milk powder cap is injection molded at the molding station 111 of the upper part of the front mold core 110, while the semi-finished two-color milk powder cap with a hard plastic injection-molded portion is formed at the molding station 111 of the lower part of the front mold core 110.

[0055] The first housing 100 and the second housing 200 separate from the mold, the front mold core 110 and the rear mold core 210 separate, the second hydraulic cylinder 310 and the third hydraulic cylinder 330 move simultaneously, pushing the front mold core 110, the finished two-color milk powder cap and the soft rubber nozzle to the right. After the mold opens, the machine extends down to catch the two finished products and the soft rubber nozzle after they are ejected. Then the robot arm takes out the product and the soft rubber nozzle from the top of the machine and moves them to the product conveyor belt and the sprue recycling box.

[0056] After the robotic arm removes the product and the soft rubber nozzle from the top of the machine, the first hydraulic cylinder 440 moves, driving the front mold core 110 to rotate 180 degrees through the rack 450, gear 430 and rotating shaft 410; then the second and third hydraulic cylinders move, causing the push plate and ejector pin 340 to reset, and the mold is locked and injection is performed again, repeating the above process.

[0057] Therefore, this rotary pusher plate two-color milk powder cap injection molding machine can automatically and efficiently complete the injection molding production of two-color milk powder caps. Furthermore, the equipment has a simple structure, small size, and high production efficiency. It also ensures cooling water circulation during the injection molding process.

[0058] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A rotary pusher plate two-color milk powder cap injection molding machine, characterized in that, include: A first housing (100) is provided with a front mold core (110) inside the first housing (100). The second housing (200) is movably disposed to the right of the first housing (100). A rear mold core (210) is disposed inside the second housing (200). The front mold core (110) and the rear mold core (210) together form a molding cavity for molding a two-color milk powder cap. The front mold core (110) includes two molding stations (111). One molding station (111) is disposed in the lower half of the front mold core (110), and the other molding station (111) is disposed in the lower half of the front mold core (110). The two molding stations (111) are centrally symmetrically arranged. A soft rubber hot runner is provided inside the first housing (100) and is connected to the molding station (111) located in the upper half of the front mold core (110). A hard plastic hot runner is provided inside the first housing (100) and is connected to the molding station (111) located in the lower half of the front mold core (110). The ejection mechanism is disposed inside the first housing (100) and is connected to the front mold core (110). The ejection mechanism is used to eject the front mold core (110), the formed two-color milk powder cap and the soft rubber nozzle. A rotating mechanism is disposed inside the first housing (100) and connected to the front mold core (110). The rotating mechanism is used to rotate the front mold core (110) after it is pushed to the right, so that the positions of the two molding stations (111) are interchanged. The rotating mechanism includes a rotating shaft (410), which is rotatably disposed in the first housing (100). One end of the rotating shaft (410) is connected to the front mold core (110), and the other end of the rotating shaft (410) is provided with a bushing (420) that can move axially along the rotating shaft (410). A gear (430) is provided on the bushing (420). The ejection mechanism includes a second hydraulic cylinder (310), which is mounted on the housing. The output shaft of the second hydraulic cylinder (310) is connected to a slider (320). The slider (320) is connected to the end of the rotating shaft (410) away from the front mold core (110). The hydraulic cylinder drives the slider (320) to slide left and right. The slider (320) drives the front mold core (110) to move back and forth through the rotating shaft (410).

2. The rotary pusher plate dual-color milk powder cap injection molding equipment according to claim 1, characterized in that, It also includes a water circulation mechanism that passes through the first housing (100) and the front mold core (110) and is used for cooling during the injection molding process.

3. The rotary pusher plate dual-color milk powder cap injection molding equipment according to claim 2, characterized in that, The rotating mechanism further includes a first hydraulic cylinder (440), which is mounted on the housing. A rack (450) is mounted on the output shaft of the first hydraulic cylinder (440). The gear (430) cooperates with the rack (450) to drive the rotating shaft (410) to rotate.

4. The rotary pusher plate dual-color milk powder cap injection molding equipment according to claim 3, characterized in that, The water circulation mechanism includes a first water path (510) and a second water path (520). The first water path (510) is disposed in the slider (320), and the second water path (520) is disposed in the rotating shaft (410).

5. The rotary pusher plate dual-color milk powder cap injection molding equipment according to claim 4, characterized in that, The first water passage (510) and the second water passage (520) are connected through an annular interface (530) so that the cooling water can always be circulated when the front mold core (110) rotates.

6. The rotary pusher plate dual-color milk powder cap injection molding equipment according to claim 5, characterized in that, Sealing rings (550) are provided on both sides of the annular interface (530).

7. The rotary pusher plate dual-color milk powder cap injection molding equipment according to claim 6, characterized in that, The drive mechanism also includes a third cylinder (330) and a ejector pin (340). The third cylinder (330) is disposed inside the first housing (100), and the third cylinder (330) ejects the soft rubber nozzle through the ejector pin (340).

8. The rotary pusher plate two-color milk powder cap injection molding equipment according to claim 7, characterized in that, The soft hot runner and the hard hot runner are arranged perpendicular to each other.

9. A control method for a rotary pusher-type two-color milk powder cap injection molding machine, characterized in that, The rotary pusher plate dual-color milk powder cap injection molding equipment is the rotary pusher plate dual-color milk powder cap injection molding equipment according to claim 8, and the control method includes: Hard rubber raw materials and soft rubber raw materials are added to the corresponding equipment hoppers using a feeder; The mold is closed for injection molding. Hard plastic is injected into the molding station (111) in the lower half of the front mold core (110), and soft plastic is injected into the molding station (111) in the upper half of the front mold core (110). The mold opening separates the first housing (100) from the second housing (200), causing the front mold core (110) to separate from the rear mold core (210); The second oil cylinder (310) and the third oil cylinder (330) operate simultaneously to eject the front mold core (110) and eject the two-color milk powder cap and soft rubber nozzle formed on the upper half of the front mold core (110). The robot arm takes out the two-color milk powder cap and soft rubber nozzle located on and ejected from the upper half of the front mold core (110). The first oil cylinder (440) drives the front mold core (110) to rotate 180°, and the second oil cylinder (310) and the third oil cylinder (330) operate to reset the ejector pin (340) and the front mold core (110), and then close the mold again for injection molding.

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