An automatic lipstick filling device

Abstract

This application relates to an automatic lipstick filling device, belonging to the field of cosmetic production equipment. It includes a mold unit, a feeding unit, and an injection pipe. The injection pipe includes a first section and a second section, which are telescopically connected. The first section is inserted into the mold cavity and has a port for the lipstick core material to flow out, located at one end of the first section near the bottom of the mold cavity. A baffle is fixedly installed on the first section, adaptable to the end face of the mold cavity. The lipstick core material inside the mold cavity can push the baffle and the first section to move away from the bottom of the mold cavity. An elastic element connected to the first section is provided on the second section, which can press the first section towards the mold cavity. During the upward movement of the baffle, the device continuously compresses the material, thereby improving the filling density, reducing defects such as air bubbles and voids, and improving the molding quality of the lipstick core product.

Description

Technical Field

[0001] This application relates to the field of cosmetic production equipment, and in particular to an automatic lipstick filling device. Background Technology

[0002] As a common type of cream cosmetic, lipstick typically requires the molten lipstick material to be injected into a pre-designed mold cavity, and then cooled and solidified to form a lipstick core with a predetermined shape. The appearance integrity, internal density, and molding consistency of the lipstick core directly affect its performance and commercial value. Therefore, the quality control of the injection process during lipstick core filling and molding is particularly important.

[0003] In existing technologies, lipstick core filling generally employs a direct injection method from above the mold cavity. This involves moving the injection head or nozzle above the lipstick core mold cavity and then injecting the molten lipstick core material from top to bottom into the cavity. After the material naturally fills the cavity, it cools and solidifies. This method has a relatively simple structure and facilitates continuous filling, thus it is widely used in lipstick core production.

[0004] However, because lipstick core materials typically have a certain viscosity, during the top-down injection process into the mold cavity, the material is prone to rolling, accumulating, and flowing disturbances. This makes it difficult for existing air within the mold cavity to escape smoothly and in a timely manner, easily causing air to be trapped inside the material. On the one hand, this affects the smoothness and surface quality of the lipstick core product, reducing its aesthetic appeal; on the other hand, it may also weaken the density and overall strength of the internal structure of the lipstick core, making it more susceptible to breakage, chipping, and localized collapse during subsequent demolding, assembly, or use, thus affecting product yield and user experience.

[0005] Therefore, how to reduce air entrainment, decrease air bubbles and voids during filling, and improve the molding quality of lipstick cores has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In order to reduce air entrainment, decrease air bubbles and voids during filling, and improve the forming quality of lipstick cores, this application provides an automatic lipstick filling device.

[0007] The automatic lipstick filling device provided in this application adopts the following technical solution: An automatic lipstick filling device includes a mold unit, a feeding unit, and an injection tube. The mold unit is provided with a mold cavity for forming lipstick cores. The feeding unit can supply lipstick core raw materials to the injection tube, and the injection tube can inject the raw materials into the mold cavity. The injection tube includes a first tube section and a second tube section, which are telescopically connected. The first tube section is used to insert into the mold cavity and has a port for the lipstick core material to flow out. The port is located at one end of the first tube section near the bottom of the mold cavity. The first pipe section is fixedly provided with a baffle that can be adapted to the end face of the mold cavity. The baffle can enter the mold cavity with the first pipe section and come into contact with the lipstick core material in the mold cavity. The lipstick core material in the mold cavity can push the baffle and the first pipe section to move away from the bottom of the mold cavity. The second pipe section is provided with an elastic element connected to the first pipe section. The elastic element can squeeze the first pipe section toward the mold cavity.

[0008] By adopting the above technical solution, during filling, the first tube section can extend into the mold cavity and inject material close to the bottom of the mold cavity. This allows the lipstick core material to gradually fill the mold cavity from the bottom upwards, reducing the rolling, impact, and flow disturbance caused by the material falling freely from top to bottom into the mold cavity. This facilitates the smooth discharge of air from the mold cavity and reduces air entrapment. Furthermore, the baffle can move upwards synchronously with the material liquid level during the injection process. The elastic element continuously applies a squeezing force towards the inside of the mold cavity to the first tube section, creating a continuous squeezing effect on the material during the upward movement of the baffle. This, in turn, helps to improve the density of the material filling, reduce defects such as air bubbles and voids, and improve the molding quality of the lipstick core product.

[0009] Preferably, the port is flush with the surface of the baffle and the lipstick core material.

[0010] By adopting the above technical solution, the lipstick core material can flow out smoothly from the position near the baffle, avoiding obvious bulges or depressions at the port relative to the baffle surface, and improving the uniformity of filling.

[0011] Preferably, the side of the baffle facing the lipstick core material is configured as a guide surface with a central protrusion and a rounded perimeter.

[0012] By adopting the above technical solution, the central protrusion structure can guide the raw material to flow in all directions, reduce the local accumulation of raw material on the surface of the baffle, and the rounded corner transition can avoid the formation of dead corners for material accumulation at the edge of the baffle, thereby reducing the adhesion and hanging of raw material to the baffle, and making the spreading of raw material in the mold cavity more uniform and stable, further improving the molding quality of lipstick core.

[0013] Preferably, the feeding unit includes a processing box, a stirring component, and a feeding mechanism. The processing box is connected to the lipstick core raw material storage system. The stirring component can stir the raw material entering the processing box. The feeding mechanism is connected to the processing box and the second pipe section and can transport the raw material in the processing box to the second pipe section.

[0014] By adopting the above technical solution, the processing box can transfer and condition the raw materials, and the stirring component can keep the raw materials in a relatively uniform molten state, avoiding the separation, deposition or local temperature unevenness of the components in the raw materials, and improving the uniformity of the raw materials.

[0015] Preferably, the mold unit includes a rotating frame and a plurality of molds. The rotating frame is capable of rotating cyclically, the plurality of molds are mounted on the rotating frame, and the mold cavity is disposed on the mold.

[0016] By adopting the above technical solution, the circulating rotating frame can drive multiple molds to pass through different stations such as the injection station, irradiation station and demolding station in sequence, so as to realize the continuous and automated filling process of lipstick cores and improve production efficiency.

[0017] Preferably, it also includes a lighting system located downstream of the injection pipe, the lighting system being able to illuminate the tail end of the raw material in the mold cavity.

[0018] By adopting the above technical solution, the lighting system can locally heat the tail of the raw material in the mold cavity, so that the cooling and solidification rate of the tail raw material is lower than that of the main body of the lipstick core. This allows the tail raw material to maintain its fluidity for a longer time during the shrinkage of the main body, thus compensating for the volume shrinkage of the main body and causing the shrinkage to concentrate at the tail position. This reduces the possibility of shrinkage holes forming in the main body area of ​​the lipstick core and further improves the molding quality of the lipstick core product.

[0019] Preferably, it also includes a demolding unit disposed downstream of the lighting system; The demolding unit includes a demolding moving rail, a demolding base, and a robot arm. The demolding base is for placing a shell that is compatible with the lipstick core. The demolding moving rail can transport the demolding base. The robot arm can remove the shell and connect it to the lipstick core before placing it on the demolding base.

[0020] By adopting the above technical solution, the demolding moving rail can realize the continuous conveying of the shell, and the robot can automatically complete the shell gripping, alignment, connection and placement operations, thereby automating the demolding and assembly process of the lipstick core, reducing manual intervention and improving production efficiency and assembly consistency.

[0021] Preferably, the mold has a forming hole and a base plate disposed in the forming hole, the base plate and the forming hole forming the mold cavity, the mold has a trigger element, the trigger element is connected to the base plate through a transmission mechanism, the robot can act on the trigger element so that the base plate can push out the lipstick core in the mold cavity.

[0022] By adopting the above technical solution, during demolding, the robot can directly act on the trigger, and drive the base plate to move up through the transmission mechanism, thereby ejecting the lipstick core from the mold cavity, which facilitates the docking and installation of the lipstick core with the shell, and the demolding action is stable and reliable.

[0023] Preferably, the transmission mechanism includes a first piston and a second piston. The mold has two interconnected hydraulic chambers, both of which are filled with hydraulic medium. The first piston is located in one of the hydraulic chambers, and the second piston is located in the other hydraulic chamber. The first piston is connected to the trigger, and the second piston is connected to the base plate. The movement of the first piston can be transmitted to the second piston through the hydraulic medium.

[0024] By adopting the above technical solution, the force and displacement between the trigger and the base plate can be transmitted using hydraulic medium, making the ejection action more stable, reducing the impact caused by mechanical hard contact, which is beneficial to protecting the already formed lipstick core and reducing the risk of damage.

[0025] Preferably, the first piston is connected to the mold via a return spring, which can drive the first piston and the second piston to return to their original positions.

[0026] By adopting the above technical solution, after demolding, the reset spring can drive the first piston and the second piston to return to their initial positions, thereby driving the base plate to reset, preparing for the next filling and molding, and improving the stability of the equipment's cyclic operation.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. By inserting the first tube into the mold cavity and injecting material close to the bottom of the mold cavity, the lipstick core material gradually fills the mold cavity from bottom to top, which can effectively reduce material roll-up and flow disturbance, facilitate air discharge, thereby reducing air entrainment and reducing air bubbles and void defects; 2. By setting up a baffle that moves up with the raw material liquid surface and using elastic elements to continuously apply extrusion pressure to the first tube section, a continuous extrusion and guiding effect can be formed on the raw material during the injection process, improving the density and uniformity of the raw material filling, and further improving the molding quality of the lipstick core product; 3. By illuminating the tail of the raw material in the mold cavity with a lighting system, the solidification of the raw material at the tail can be delayed, forming a shrinkage compensation area at the tail and reducing the probability of shrinkage holes in the main body area of ​​the lipstick core. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of an automatic lipstick filling device according to an embodiment of this application.

[0029] Figure 2This is a structural diagram used to demonstrate the mold.

[0030] Figure 3 It is used for display Figure 2 Top view of the structure.

[0031] Figure 4 It is along Figure 3 A cross-sectional view along line AA in the middle.

[0032] Figure 5 This is a schematic diagram used to illustrate the structure of the feeding unit.

[0033] Figure 6 It is a cross-sectional view used to show the mixing components.

[0034] Figure 7 This is a schematic diagram used to illustrate the structure of the injection tube.

[0035] Figure 8 This is a schematic diagram illustrating the structure of the injection tube inserted into the mold cavity.

[0036] Figure 9 This is a schematic diagram used to demonstrate the structure of the demolding unit.

[0037] Figure 10 This is a schematic diagram illustrating the structure of the gripper and trigger ring working together.

[0038] Explanation of reference numerals in the attached drawings: 1. Mold unit; 11. Circulating rotating frame; 12. Mold; 121. Forming hole; 122. Base plate; 123. Mold cavity; 13. Trigger element; 131. Trigger ring; 14. Transmission mechanism; 141. First piston; 142. Second piston; 143. Hydraulic chamber; 144. Driving piston rod; 145. Driven piston rod; 146. Return spring; 2. Feeding unit; 21. Processing box; 22. Mixing element; 221. Mixing motor; 222. Mixing shaft; 223. Mixing paddle; 23. Feeding mechanism; 231. Metering pump; 232. 24. Hose; 3. Lifting frame; 4. Injection pipe; 5. First pipe section; 6. Second pipe section; 7. Port; 8. Baffle; 9. Guide surface; 10. First spring seat; 11. Second spring seat; 12. Elastic element; 13. Telescopic spring; 14. Lighting system; 15. Demolding unit; 16. Demolding moving rail; 17. Demolding seat; 18. First mounting hole; 19. Second mounting hole; 10. Robotic arm; 11. Gripper; 12. Injection station; 13. Irradiation station; 14. Demolding station; 15. Detection component; 16. Lipstick core; 17. Housing. Detailed Implementation

[0039] The following is in conjunction with the appendix Figures 1-10 This application will be described in further detail.

[0040] This application discloses an automatic lipstick filling device.

[0041] Reference Figure 1 , Figure 2 An automatic lipstick filling device includes a mold unit 1, a feeding unit 2, an injection pipe 3, a lighting system 4, and a demolding unit 5. The mold unit 1 is used to provide mold cavities 123 required for forming multiple lipstick cores 81. The feeding unit 2 is used to store, prepare, and transport molten lipstick core raw materials. The injection pipe 3 is used to inject the lipstick core raw materials into the mold cavities 123. The lighting system 4 is used to illuminate the tail end of the raw materials in the mold cavities 123. The demolding unit 5 is used to complete demolding and assembly with the shell 82 after the lipstick cores 81 have cooled and formed.

[0042] The mold unit 1 in this embodiment includes a rotating frame 11 and several molds 12. The rotating frame 11 is rotatably connected to the base and driven by a motor. Several molds 12 are embedded on the surface of the rotating frame 11. The molds 12 are evenly arranged along the circumference of the rotating frame 11. Each mold 12 is strip-shaped and is radially intersected with the rotating frame 11.

[0043] Reference Figure 3 , Figure 4 Each mold 12 has four forming holes 121, which are evenly arranged along the length of the mold 12. Each forming hole 121 has a base plate 122, which is slidably connected to the forming hole 121. The base plate 122 and the forming hole 121 form a cavity 123 for forming the lipstick core 81. Each mold 12 has a trigger element 13 corresponding to the cavity 123. In this embodiment, the trigger element 13 includes a trigger ring 131. The inner diameter of the trigger ring 131 is larger than the diameter of the forming hole 121. The trigger ring 131 is coaxially arranged above the forming hole 121. Each trigger element 13 is connected to each base plate 122 through a transmission mechanism 14.

[0044] The transmission mechanism 14 in this embodiment includes a first piston 141 and a second piston 142. The mold 12 has two parallel hydraulic chambers 143, which are connected at their bottoms. The first piston 141 is slidably and sealed in one of the hydraulic chambers 143, and the second piston 142 is slidably and sealed in the other hydraulic chamber 143. The hydraulic chamber 143 between the first piston 141 and the second piston 142 is filled with a hydraulic medium. In this embodiment, the hydraulic medium is hydraulic oil. This arrangement allows the hydraulic medium to push the second piston 142 up when the first piston 141 presses down on the hydraulic medium, thereby realizing the transmission between the first piston 141 and the second piston 142.

[0045] The first piston 141 and the trigger ring 131 are fixedly connected by a vertically arranged active piston rod 144, achieving synchronous movement between the first piston 141 and the trigger ring 131. The second piston 142 and the base plate 122 are fixedly connected by a driven piston rod 145, achieving synchronous movement between the second piston 142 and the base plate 122. A return spring 146 is sleeved on the active piston rod 144. The return spring 146 is located between the surface of the mold 12 and the trigger ring 131. The return spring 146 applies an upward elastic force to the trigger ring 131, so that the trigger ring 131, the first piston 141, the second piston 142, and the base plate 122 can all be reset.

[0046] Reference Figure 1 , Figure 5 The base is provided with an injection station 61, an irradiation station 62 and a demolding station 63 in sequence on the circulating rotating frame 11. The feeding unit 2 and the injection pipe 3 are both set at the injection station 61. The feeding unit 2 includes a processing box 21, a stirring component 22 and a feeding mechanism 23. The processing box 21 is set on the frame. The processing box 21 is connected to the lipstick core raw material storage system through a plunger pump. The plunger pump transports the lipstick core raw material in the lipstick core raw material storage system to the processing box 21.

[0047] Reference Figure 6 In this embodiment, the stirring component 22 includes a stirring motor 221, a stirring shaft 222, and a stirring paddle 223. The stirring motor 221 is mounted on the frame, the stirring shaft 222 is connected to the output shaft of the stirring motor 221 and inserted into the processing box 21, and the stirring paddle 223 is placed horizontally in the processing box 21 and is fixedly connected to the part of the stirring shaft 222 inserted into the processing box 21. The stirring paddle 223 is located between the top inlet and the bottom outlet of the processing box 21, so that the raw materials entering the processing box 21 can be stirred by the stirring paddle 223 before being discharged from the bottom outlet, so as to maintain the uniformity of raw material composition and temperature, prevent the components in the raw materials from settling, stratification or local condensation, and improve the stability of feeding and product consistency.

[0048] Since there are four mold cavities 123 on each mold 12 in this embodiment, there are four injection tubes 3. The feeding mechanism 23 in this embodiment includes four metering pumps 231 set at the bottom of the corresponding processing box 21. The inlet of the four metering pumps 231 is connected to the inside of the processing box 21. The outlet of each metering pump 231 is connected to the injection tube 3 through a hose 232. The metering pumps 231 transport the lipstick core material in the processing box 21 to the injection tube 3. On the other hand, the metering pumps 231 can control the amount of material injected into the mold cavity 123 by the injection tube 3 each time.

[0049] Reference Figure 5 , Figure 7Above the rotating frame 11, a lifting frame 24 is provided. The lifting frame 24 is driven by a linear cylinder, and four injection pipes 3 are all arranged vertically on the lifting frame 24. In this embodiment, the injection pipe 3 includes a first pipe section 31 and a second pipe section 32. The first pipe section 31 is slidably inserted into the second pipe section 32 to realize the telescopic connection between the first pipe section 31 and the second pipe section 32. The second pipe section 32 is fixedly connected to the lifting frame 24 and connected to the hose 232.

[0050] Reference Figure 7 , Figure 8 The bottom of the first pipe section 31 is provided with a port 33. When the lifting frame 24 drives the port 33 of the first pipe section 31 to be inserted into the mold cavity 123, the lipstick core material can flow out through the port 33 and enter the mold cavity 123. A baffle 34 is fixedly provided on the first pipe section 31. The outer edge contour of the baffle 34 is adapted to the end face of the mold cavity 123, and the port 33 is flush with the surface of the baffle 34 and the lipstick core material. The bottom surface of the baffle 34 is set as a guide surface 35 with a central protrusion and a rounded corner transition. Specifically, the thickness of the baffle 34 gradually decreases from the inside to the outside, thereby forming the guide surface 35.

[0051] A first spring seat 361 is fixedly installed on the portion of the first pipe segment 31 near the second pipe segment 32, and a second spring seat 362 is fixedly installed on the portion of the second pipe segment 32 near the first pipe segment 31. An elastic element 37 is provided between the first spring seat 361 and the second spring seat 362. In this embodiment, the elastic element 37 is a telescopic spring 371. The telescopic spring 371 is sleeved on the first pipe segment 31 and the second pipe segment 32, and is fixedly connected to the first spring seat 361 and the second spring seat 362 respectively to prevent the first pipe segment 31 from detaching from the second pipe segment 32. The telescopic spring 371 applies a downward elastic force to the first pipe segment 31.

[0052] When the mold 12 moves to the injection station 61, the mold cavity 123 on the mold 12 is aligned with the injection pipe 3. The lifting frame 24 drives the injection pipe 3 to descend, so that the port 33 of the first pipe section 31 and the baffle 34 are inserted into the bottom of the mold cavity 123. The plunger pump delivers the lipstick core material from the processing box 21 to the mold cavity 123 through the hose 232, the second pipe section 32 and the first pipe section 31, so that the material gradually fills the mold cavity 123 from bottom to top. The filling process of the material is more stable, which can reduce the impact of the material falling and the tumbling disturbance. It is also beneficial for the air in the mold cavity 123 to be gradually discharged above the material liquid surface, reducing the air being trapped inside the material. As the amount of lipstick core material increases in the mold cavity 123, the baffle 34 moves upward synchronously with the liquid surface under the push of the material. At this time, the telescopic spring 371 contracts and continuously exerts a certain squeezing force on the material under the action of the telescopic spring 371, which helps to improve the filling density of the material in the mold cavity 123 and reduce defects such as air bubbles and voids.

[0053] The raised structure in the middle of the guide surface 35 can guide the raw material to disperse to the periphery as the baffle 34 moves up with the liquid surface, reducing the possibility of the raw material accumulating in the middle of the baffle 34; the rounded corner transition at the periphery can reduce the probability of forming dead corners of material hanging and accumulation at the edge of the baffle 34, thereby reducing the adhesion between the raw material and the baffle 34, and facilitating the more uniform spreading of the raw material in the mold cavity 123.

[0054] Reference Figure 1 The lighting system 4 is mounted on a frame at the irradiation station 62 downstream of the injection station 61. After the injection is completed in the mold cavity 123, the rotating frame 11 transports the mold 12 to the irradiation station 62. The lighting system 4 can irradiate the tail end of the material in the mold cavity 123. Preferably, the lighting system 4 uses a halogen lamp to locally heat the tail end of the material using the heat radiation of the halogen lamp. It should be noted that in this embodiment, the lighting system 4 irradiates the tail of the raw material, not to promote the solidification of the lipstick core material through photochemical means, but to delay the cooling and solidification of the tail material by locally heating the tail. Since the lipstick core material is usually a wax-based or oil-based melt system, its solidification mainly depends on solidification after cooling. Therefore, by continuously irradiating the tail, the tail material can maintain its fluidity for a longer time when the main body of the lipstick core 81 cools and shrinks. In this way, the tail material can compensate for the volume shrinkage of the main body and make the final shrinkage tend to concentrate in the tail area, thereby reducing the risk of shrinkage pores forming in the main body of the lipstick core 81 and improving the appearance and internal density of the finished product.

[0055] Reference Figure 1 A detection component 7 is installed downstream of the irradiation station 62 on the frame. The detection component 7 can detect whether a lipstick core 81 has been formed in the mold cavity 123 when the mold 12 moves to the detection station. The detection component 7 includes a detection needle that can move toward the inside of the mold cavity 123. The detection needle is inserted into the mold cavity 123 during detection, and the presence of a formed lipstick core 81 in the mold cavity 123 is determined based on the obstruction state encountered during the insertion of the detection needle.

[0056] Specifically, when a molded lipstick core 81 is present in the mold cavity 123, since the lipstick core 81 occupies a corresponding space within the mold cavity 123 and has a certain shape retention capability, the detection needle will contact the lipstick core 81 earlier when inserted into the mold cavity 123 and will be blocked by the lipstick core 81. This reduces the insertion depth of the detection needle or increases the reaction force on the detection needle. The detection component 7 can determine the presence of a molded lipstick core 81 in the mold cavity 123 based on the insertion displacement of the detection needle, changes in force, or drive feedback signals.

[0057] When there is no lipstick core 81 in the mold cavity 123, or when the lipstick core 81 in the mold cavity 123 is abnormally formed or missing, the obstruction encountered by the detection needle during insertion is weakened or almost non-existent, allowing the detection needle to continue moving deeper into the mold cavity 123. The detection component 7 determines, based on the comparison between the insertion depth reached by the detection needle, the insertion force, or the drive feedback signal and a preset threshold, that there is no formed lipstick core 81 in the mold cavity 123 or that the lipstick core 81 in the mold cavity 123 is abnormally formed.

[0058] By adopting the above detection method, the forming state of the lipstick core 81 in the mold cavity 123 can be predicted before demolding, which facilitates the subsequent work stations to remove, mark or remedy abnormal molds 12, thereby improving the automation level of the equipment and the product yield.

[0059] Reference Figure 1 , Figure 9 and Figure 10 The demolding unit 5 is located in the demolding station 63 downstream of the irradiation station 62. The demolding unit 5 includes a demolding moving rail 51, a demolding base 52, and a robot arm 53. The demolding moving rail 51 is used as a separate moving production line. The demolding base 52 is set on the demolding moving rail 51. The demolding moving rail 51 moves the demolding base 52 to the demolding station 63. After the demolding operation is completed, the demolding base 52 is removed, realizing the continuity of the demolding operation. The demolding base 52 is provided with a set of first mounting holes 521 and a set of second mounting holes 522. Each set of first mounting holes 521 and second mounting holes 522 has four holes. The first mounting holes 521 and second mounting holes 522 are arranged alternately along the arrangement direction. The diameter of the first mounting hole 521 is smaller than the diameter of the second mounting hole 522. The housing 82 is inserted upside down into the first mounting hole 521 and is transported to the demolding station 63 along with the demolding base 52. After the robot arm 53 connects the housing 82 to the lipstick core 81 in the mold cavity 123, the housing 82 is rotated 180° and placed in the second mounting hole 522.

[0060] Reference Figure 3 In this embodiment, the robotic arm 53 includes a movable frame, a clamping drive, and two grippers 531. Each gripper 531 has an arc-shaped groove that matches the outer circumferential surface of the housing 82. The clamping drive drives the two grippers 531 to clamp and fix the housing 82. The movable frame drives the grippers 531 to move in space and reverse. When the two grippers 531 are clamping the housing 82, the distance between the two grippers 531 is less than the diameter of the trigger ring 131, so that the grippers 531 can push the trigger ring 131 to move as the housing 82 moves toward the mold cavity 123.

[0061] During the demolding process, the rotating frame 11 drives the mold 12 to the demolding station 63. The gripper 531 of the robot arm 53 picks up the shell 82 on the demolding base 52 and moves it toward the mold 12 at the demolding station 63. When the gripper 531 holds the shell 82 close to the mold cavity 123, the shell 82 passes through the trigger ring 131. The gripper 531 presses down on the trigger ring 131. The trigger ring 131 drives the base plate 122 to move upward through the active piston rod 144, the first piston 141, the hydraulic medium, the second piston 142, and the driven piston rod 145. The base plate 122 pushes out the lipstick core 81 from the mold cavity 123, making it easier for the lipstick core 81 to be inserted into the shell 82, thus completing the fixed connection between the lipstick core 81 and the shell 82. Then, the robot arm 53 drives the shell 82 to rise and rotate 180°, and then places the shell 82 into the second mounting hole 522, completing the demolding of the lipstick core 81. The rotating frame 11 drives the mold 12, which has completed demolding, back to the injection station 61, completing the cycle of the mold 12.

[0062] The implementation principle of the automatic lipstick filling equipment in this application embodiment is as follows: First, the feeding unit 2 conveys the molten lipstick core material to the injection pipe 3, and the circulating rotating frame 11 drives the empty mold 12 to the injection station 61. At this time, the first pipe section 31 extends into the mold cavity 123 and approaches the bottom of the mold cavity 123, and the baffle 34 enters the mold cavity 123 together with the first pipe section 31.

[0063] Subsequently, the lipstick core material enters the first section 31 through the second pipe section 32 and flows out from the port 33 near the bottom of the mold cavity 123, filling the mold cavity 123 from bottom to top. As the material continuously enters the mold cavity 123, the baffle 34 and the first pipe section 31 gradually move upward under the push of the material. During the compression process, the elastic element 37 continuously applies a squeezing force towards the inside of the mold cavity 123 to the first pipe section 31, so that the baffle 34 continuously squeezes and guides the material during the upward movement. In this way, the material rollover and air entrainment can be reduced, and the filling density can be improved.

[0064] Once the mold cavity 123 is filled with raw material, the circulating rotating frame 11 transports the mold 12 to the corresponding station of the lighting system 4. The lighting system 4 illuminates the tail end of the raw material in the mold cavity 123, delaying the solidification of the tail end and allowing the tail end of the raw material to compensate for shrinkage when the main body cools and shrinks, thus reducing shrinkage holes.

[0065] Afterwards, the mold 12 continues to run to the detection component 7. During the detection, the detection needle is inserted into the mold cavity 123. The presence of a formed lipstick core 81 in the mold cavity 123 is determined based on the obstruction state of the detection needle during insertion. This facilitates the subsequent workstations to remove, mark, or remedy abnormal molds 12, thereby improving the automation level of the equipment and the product yield.

[0066] Afterwards, the mold 12 continues to run to the demolding station 63. The gripper 531 of the robot arm 53 picks up the housing 82 on the demolding base 52 and moves it toward the mold 12 at the demolding station 63. When the gripper 531 holds the housing 82 close to the mold cavity 123, the housing 82 passes through the trigger ring 131. The gripper 531 presses down the trigger ring 131. The trigger ring 131 drives the base plate 122 to move upward through the active piston rod 144, the first piston 141, the hydraulic medium, the second piston 142, and the driven piston rod 145. The base plate 122 pushes out the lipstick core 81 in the mold cavity 123, so that the lipstick core 81 can be inserted into the housing 82, thus completing the fixed connection between the lipstick core 81 and the housing 82. Then, the robotic arm 53 drives the housing 82 to lift and rotate 180°, and then places the housing 82 into the second mounting hole 522, completing the demolding of the lipstick core 81, which is then transported to the subsequent work station by the demolding moving rail 51. At the same time, the return spring 146 drives the first piston 141, the second piston 142 and the base plate 122 to reset, so that the mold 12 can enter the next filling cycle.

[0067] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic lipstick filling device, characterized in that: It includes a mold unit (1), a feeding unit (2) and an injection tube (3). The mold unit (1) is provided with a mold cavity (123) for forming lipstick cores (81). The feeding unit (2) can supply lipstick core (81) raw materials to the injection tube (3). The injection tube (3) can inject the raw materials into the mold cavity (123). The injection tube (3) includes a first tube section (31) and a second tube section (32). The first tube section (31) and the second tube section (32) are telescopically connected. The first tube section (31) is used to insert into the mold cavity (123). The first tube section (31) has a port (33) for the raw material of the lipstick core (81) to flow out. The port (33) is located at one end of the first tube section (31) near the bottom of the mold cavity (123). The first tube segment (31) is fixedly provided with a baffle (34) that can be adapted to the end face of the mold cavity (123). The baffle (34) can enter the mold cavity (123) along with the first tube segment (31) and come into contact with the lipstick core (81) material in the mold cavity (123). The lipstick core (81) material in the mold cavity (123) can push the baffle (34) and the first tube segment (31) to move away from the bottom of the mold cavity (123). The second tube segment (32) is provided with an elastic element (37) connected to the first tube segment (31). The elastic element (37) can squeeze the first tube segment (31) toward the mold cavity (123).

2. The automatic lipstick filling equipment according to claim 1, characterized in that: The port (33) is flush with the surface of the baffle (34) and the raw material of the lipstick core (81).

3. The automatic lipstick filling equipment according to claim 1, characterized in that: The baffle (34) is configured as a guide surface (35) with a central protrusion and a rounded perimeter on the side facing the lipstick core (81) material.

4. The automatic lipstick filling equipment according to claim 1, characterized in that: The feeding unit (2) includes a processing box (21), a stirring component (22), and a feeding mechanism (23). The processing box (21) is connected to the lipstick core (81) raw material storage system. The stirring component (22) can stir the raw material entering the processing box (21). The feeding mechanism (23) is connected to the processing box (21) and the second pipe section (32) and can transport the raw material in the processing box (21) to the second pipe section (32).

5. The automatic lipstick filling equipment according to claim 4, characterized in that: The mold unit (1) includes a rotating frame (11) and several molds (12). The rotating frame (11) is capable of rotating in a cycle. Several molds (12) are mounted on the rotating frame (11). The mold cavity (123) is disposed on the mold (12).

6. The automatic lipstick filling equipment according to claim 5, characterized in that: It also includes a lighting system (4) located downstream of the injection tube, which can illuminate the tail end of the raw material in the mold cavity (123).

7. The automatic lipstick filling equipment according to claim 6, characterized in that: It also includes a demolding unit (5) located downstream of the lighting system (4); The demolding unit (5) includes a demolding moving rail (51), a demolding seat (52), and a robot (53). The demolding seat (52) is for placing a housing (82) that is compatible with the lipstick core (81). The demolding moving rail (51) can transport the demolding seat (52). The robot (53) can remove the housing (82) and connect the housing (82) with the lipstick core (81) and place it on the demolding seat (52).

8. The automatic lipstick filling equipment according to claim 7, characterized in that: The mold (12) is provided with a forming hole (121) and a base plate (122) disposed in the forming hole (121). The base plate (122) and the forming hole (121) form the mold cavity (123). The mold (12) is provided with a trigger (13). The trigger (13) is connected to the base plate (122) through a transmission mechanism (14). The robot (53) can act on the trigger (13) so that the base plate (122) can push out the lipstick core (81) in the mold cavity (123).

9. The automatic lipstick filling equipment according to claim 8, characterized in that: The transmission mechanism (14) includes a first piston (141) and a second piston (142). The mold (12) has two interconnected hydraulic chambers (143), both of which are filled with hydraulic medium. The first piston (141) is located in one of the hydraulic chambers (143), and the second piston (142) is located in the other hydraulic chamber (143). The first piston (141) is connected to the trigger (13), and the second piston (142) is connected to the base plate (122). The movement of the first piston (141) can be transmitted to the second piston (142) through the hydraulic medium.

10. The automatic lipstick filling equipment according to claim 9, characterized in that: The first piston (141) is connected to the mold (12) by a return spring (146), which can drive the first piston (141) and the second piston (142) to reset.

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