Eyebrow pencil refill forming equipment

Abstract

The utility model discloses eyebrow pencil refill forming equipment. The eyebrow pencil refill forming equipment comprises a horizontal frame body, a feeding mechanism, a mold assembly, a pressure mechanism and an ejection assembly. The horizontal frame body is composed of a front end plate, a rear end plate and four sliding rods, and the structural rigidity is ensured. The feeding mechanism comprises a feeding sleeve and a spiral propeller driven by a gear motor, and quantitative feeding is achieved. The mold assembly is provided with a double-groove middle mold, a snakelike cooling pipeline is arranged in the middle mold, the middle mold communicates with the front mold through a T-shaped conveying pipe, and the forming efficiency is improved. And the pressure mechanism adopts a servo motor to drive a screw rod to drive the rear mold to be precisely closed. And the ejection assembly realizes lossless demolding through an ejector pin. The equipment integrates the functions of high-precision feeding, rapid cooling and multi-station forming, has the advantages of high production efficiency, good forming precision, convenience in die replacement and the like, and solves the problems of low efficiency, poor precision and the like of traditional equipment.

Description

Technical Field

[0001] This utility model relates to molding equipment, and more particularly to an eyebrow pencil lead molding equipment. Background Technology

[0002] As a common cosmetic product, the quality of the eyebrow pencil lead directly affects its effectiveness and production efficiency. Traditional eyebrow pencil lead manufacturing processes mainly include hot pressing and cold pressing, but current technologies still have many shortcomings:

[0003] Traditional single-cavity molds can only mold one pen refill at a time and have a long cooling cycle, making them unsuitable for mass production. Although some equipment has attempted to adopt a multi-station design, problems such as uneven flow distribution and incomplete filling exist, leading to a decrease in product qualification rate.

[0004] Existing equipment mostly uses a vertical structure or a simple guiding mechanism, which is easily affected by off-center loading during mold closing, resulting in fluctuations in the size of the pen refill. In addition, the amount of raw material filling depends on manual control, resulting in poor density consistency.

[0005] Inaccurate temperature control requires hot pressing equipment to continuously heat the raw materials, resulting in high energy consumption and potential decomposition of heat-sensitive components (such as plant waxes and essential oils); while uneven cooling during cold pressing can easily lead to surface cracks or internal porosity in the pen refill.

[0006] Therefore, there is an urgent need for a dedicated equipment for eyebrow pencil lead that integrates high-precision feeding, rapid cooling, multi-station synchronous molding, and easy mold changing. Utility Model Content

[0007] To address the shortcomings of the aforementioned technologies, this utility model provides an eyebrow pencil lead forming device.

[0008] To solve the above technical problems, the technical solution adopted by this utility model is: an eyebrow pencil lead forming device, comprising:

[0009] The horizontal frame includes a front panel and a rear panel arranged in parallel, as well as multiple sliding rods connecting the front panel and the rear panel;

[0010] The feeding mechanism includes a feeding sleeve and a geared motor fixedly connected to the front end plate. A screw propeller is rotatably installed in the hollow channel of the feeding sleeve. The screw propeller is connected to the shaft of the geared motor. A feeding port is connected to the circumferential side wall of the feeding sleeve.

[0011] The mold assembly includes a front mold connected to a feeding sleeve, a rear mold slidably mounted on a slide rod, and a middle mold connected to the front side of the front mold. The middle mold has a groove, and cooling pipes pass through the middle mold. The cooling pipes are coiled around the outside of the groove. The groove is connected to the front mold, and an ejection hole is provided at the bottom of the groove.

[0012] The pressure mechanism includes a servo motor fixedly connected to the rear end plate. The servo motor drives a screw mounted on the rear end plate to rotate via a pulley assembly. The screw is threaded into the rear mold.

[0013] The ejector assembly includes an ejector plate and ejector pins connected to the ejector plate. The ejector plate is slidably disposed in a reserved space between the rear mold and the middle mold, and the ejector pins are matched in the ejector holes.

[0014] Furthermore, both the front and rear plates are square plates, and there are four sliding rods symmetrically arranged at the four corners of the front and rear plates.

[0015] Furthermore, the geared motor is mounted on the outside of the front end plate via a bracket, the feeding sleeve is mounted on the inner center of the front end plate, the spiral part of the screw propeller is rotatably disposed inside the feeding sleeve, the front end of the screw propeller passes through the front end plate and connects to the shaft of the geared motor, and the rear end of the screw propeller does not pass through the feeding sleeve.

[0016] Furthermore, the front mold is fixedly connected to the feeding sleeve, and the central channel of the front mold is connected to the hollow channel of the feeding sleeve.

[0017] Furthermore, there are two grooves on the middle mold, and the openings formed by the two grooves on the front side of the middle mold through the T-shaped built-in conveying pipe are aligned with the center channel of the front mold.

[0018] Furthermore, the pulley assembly includes a drive pulley mounted on the servo motor shaft, a driven pulley mounted on the screw, and a conveyor belt mounted on the drive pulley and the driven pulley.

[0019] Furthermore, the ejector plate is slidably mounted on a guide post in the reserved space between the rear mold and the middle mold, and a handle is connected to the side wall of the ejector plate outward.

[0020] This patent discloses an eyebrow pencil lead forming device. The device employs a double-groove mold and a T-shaped distribution pipe design, enabling the simultaneous production of two pencil leads in a single molding process. This significantly improves efficiency compared to traditional single-cavity molds. Furthermore, a serpentine cooling system ensures rapid and uniform cooling, further shortening the production cycle. The horizontal frame with a symmetrical four-slide bar layout, combined with a rolling thread drive, enhances resistance to eccentric loads. Through collaborative innovation in its mechanical, control, and temperature control systems, this device achieves breakthroughs in three core indicators of eyebrow pencil lead production: precision, efficiency, and yield. The overall production cost is greatly reduced, providing a benchmark solution for precision molding equipment in cosmetics. Attached Figure Description

[0021] Figure 1 The three-dimensional representation of this utility model Figure 1 .

[0022] Figure 2 The three-dimensional representation of this utility model Figure 2 .

[0023] Figure 3 This is a partial structural diagram of the mold assembly.

[0024] Figure 4 for Figure 3 Side view.

[0025] Figure 5 A schematic diagram of the structure connecting the feeding mechanism to the front mold.

[0026] In the diagram: 11. Front end plate; 12. Rear end plate; 13. Slide bar; 21. Feed sleeve; 22. Gear motor; 23. Screw propeller; 24. Feed port; 31. Front mold; 32. Rear mold; 33. Middle mold; 331. Groove; 332. Ejector hole; 333. Internal conveying pipe; 334. Cooling pipe; 41. Servo motor; 42. Screw; 43. Drive wheel; 44. Driven wheel; 45. Conveyor belt; 51. Ejector plate; 52. Ejector pin; 53. Handle; 54. Guide post. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] This embodiment of an eyebrow pencil lead forming device includes a horizontal frame, a feeding mechanism, a mold assembly, a pressure mechanism, and an ejection assembly, specifically:

[0029] Figure 1 and Figure 2 The horizontal frame shown includes a front end plate 11 and a rear end plate 12 arranged in parallel, and multiple sliding rods 13 connecting the front end plate 11 and the rear end plate 12. Both the front end plate 11 and the rear end plate 12 are square plates. There are four sliding rods 13 symmetrically arranged at the four corners of the front end plate 11 and the rear end plate 12. The horizontal frame provides the main support frame for the equipment, ensuring overall structural rigidity. The sliding rods 13 guide the mold movement, ensuring mold closing accuracy. The symmetrical layout of the four corner sliding rods 13 provides strong resistance to eccentric loads, and the horizontal arrangement facilitates assembly line integration.

[0030] The feeding mechanism includes a feeding sleeve 21 and a geared motor 22 fixedly connected to the front end plate 11. A screw propeller 23 is rotatably mounted inside the hollow channel of the feeding sleeve 21. The screw propeller 23 is connected to the shaft of the geared motor 22. A feeding port 24 is connected to the circumferential side wall of the feeding sleeve 21. The geared motor 22 is mounted on the outside of the front end plate 11 via a bracket. The feeding sleeve 21 is mounted in the center of the inner side of the front end plate 11. The spiral part of the screw propeller 23 is rotatably mounted inside the feeding sleeve 21. The front end of the screw propeller 23 extends out of the front end plate 11 and connects to the shaft of the geared motor 22. The rear end of the screw propeller 23 does not extend out of the feeding sleeve 21. The feeding mechanism is responsible for quantitatively conveying the raw material (wax / resin mixture) from the feeding port 24 to the mold cavity, realizing automated feeding. The screw propeller 23 precisely controls the amount of material fed forward by the spiral.

[0031] The mold assembly includes a front mold 31 connected to the feeding sleeve 21, a rear mold 32 slidably mounted on the slide rod 13, and a middle mold 33 connected to the front side of the front mold 31. The middle mold 33 has a connecting part. Figure 3 In other embodiments, to further stabilize the intermediate mold 33, the four corners of the intermediate mold 33 can be fixed to the slide rod 13, and the bottom of the groove 331 is provided with an ejection hole 332; for example Figure 5 As shown, the front mold 31 is fixedly connected to the feeding sleeve 21, achieving a rigid connection between the front mold 31 and the feeding sleeve 21. The central channel of the front mold 31 connects to the hollow channel of the feeding sleeve 21. The middle mold 33 has two grooves 331. The openings formed by the two grooves 331 on the front side of the middle mold 33 through the T-shaped built-in conveying pipe 333 are aligned with the central channel of the front mold 31. Cooling pipes 334 are installed inside the middle mold 33, coiled around the periphery of the grooves 331. In this embodiment, the cooling pipes 334 are coiled in a serpentine pattern around the two grooves 331. The inlet and outlet of the cooling pipes 334 are located on the same side, and both the inlet and outlet can be connected to a flexible hose from a cold source. The mold assembly is the core forming area for creating the geometry of the pen refill. The grooves 331 and the conveying pipe guide the filling of raw materials. The double-groove 331 + T-shaped pipe design can significantly improve production efficiency.

[0032] The pressure mechanism includes a servo motor 41 fixedly connected to the rear end plate 12. The servo motor 41 drives the screw 42 mounted on the rear end plate 12 to rotate via a pulley assembly. The screw 42 is threadedly engaged with the rear mold 32. The pulley assembly includes a drive wheel 43 mounted on the shaft of the servo motor 41, a driven wheel 44 mounted on the screw 42, and a conveyor belt 45 mounted on the drive wheel 43 and the driven wheel 44. When the servo motor 41 starts, the shaft drives the drive wheel 43 to rotate, transmitting power to the driven wheel 44 via a synchronous belt. The driven wheel 44 drives the screw 42 to rotate. The screw 42 rotates on the rear end plate 12 using a bearing or threaded connection. The nut embedded in the rear mold 32 forms a rolling thread pair with the screw 42, driving the rear mold 32 along the guide of the slide bar 13 to engage the middle mold 33 with the front mold 31. The servo motor 41 can be preset with horizontal forward movement parameters. It should be understood that in other embodiments, a pressure sensor can be used to feed back the real-time pressure value of the engagement between the middle mold 33 and the front mold 31. When the servo motor reverses, the screw 42 drives the rear mold 32 back to its initial position. The start and stop of the screw propeller 23 can be calculated based on the mold cavity volume (considering the compression ratio) and accurately fed through a feeder with a fixed volume (such as a metering spoon or piston cylinder).

[0033] Combination Figure 4 As shown, the ejection assembly includes an ejection plate 51 and ejector pins 52 connected to the ejection plate 51. The ejection plate 51 is slidably disposed in the reserved space between the rear mold 32 and the middle mold 33, and the ejector pins 52 are matched in the ejection holes 332. The ejection plate 51 is slidably disposed on guide pillars in the reserved space between the rear mold 32 and the middle mold 33, and a handle 53 is connected to the side wall of the ejection plate 51 outward. The ejection assembly is responsible for ejecting the pen refill from the mold without damage after molding. This is achieved by moving the ejection plate 51 forward by moving the handle 53, causing the ejector pins 52 to pass through the ejection holes 332. In other embodiments, a miniature electric cylinder can be used to push the ejection plate 51 forward along the guide pillars 54.

[0034] The working principle of the eyebrow pencil lead forming equipment is as follows: the servo motor 41 drives the screw 42 to rotate through the pulley assembly, driving the rear mold 32 to move forward along the slide bar 13 so that the middle mold 33 and the front mold 31 are precisely closed. The reduction motor 22 drives the screw propeller 23 to rotate, quantitatively conveying the raw material from the feeding port 24 to the central channel of the front mold 31, and then diverting it to the two grooves 331 of the middle mold 33 through the T-shaped built-in conveying pipe 333. The middle mold 33 cools and forms the raw material through the cooling pipe 334. After forming, the servo motor 41 reverses to reset the rear mold 32. The operator pushes the ejector plate 51 through the handle 53 so that the ejector pin 52 passes through the ejector hole 332 and ejects the formed pencil lead, completing one work cycle.

[0035] Note that in this embodiment, the mold closure can be achieved by fixing the stroke of the nut and the screw 42. In other embodiments, a mold closure detection can be added by installing a micro switch or fiber optic sensor on the mold parting surface. When the upper mold and the middle mold 33 come into contact, a signal is triggered. If no closure signal is detected during the pressing process, it is determined that the filling is insufficient.

[0036] The eyebrow pencil lead molding equipment described in this patent has the following significant advantages and innovations: It adopts a double-groove 331 mold and a T-shaped diversion pipe design, allowing for the simultaneous production of two leads in a single molding process, significantly improving efficiency compared to traditional single-cavity molds. Furthermore, rapid and uniform cooling is achieved through a serpentine cooling pipe system 334, further shortening the production cycle. The symmetrically arranged horizontal frame with four sliding rods 13, combined with a rolling thread drive, enhances its resistance to eccentric loads. Through collaborative innovation in the mechanical-control-temperature control system, this equipment achieves breakthroughs in the three core indicators of eyebrow pencil lead production: precision, efficiency, and yield rate, significantly reducing overall production costs and providing a benchmark solution for precision molding equipment in cosmetics.

[0037] The above embodiments are not intended to limit the present invention. Unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. The present invention is not limited to the examples above. Changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the technical solution of the present invention are also within the protection scope of the present invention. Furthermore, the technical features involved in the different embodiments of the present application described above can be combined with each other as long as they do not conflict with each other.

Claims

1. An eyebrow pencil lead forming apparatus characterized by comprising: include: The horizontal frame includes a front panel and a rear panel arranged in parallel, as well as multiple sliding rods connecting the front panel and the rear panel; The feeding mechanism includes a feeding sleeve and a geared motor fixedly connected to the front end plate. A screw propeller is rotatably installed in the hollow channel of the feeding sleeve. The screw propeller is connected to the shaft of the geared motor. A feeding port is connected to the circumferential side wall of the feeding sleeve. The mold assembly includes a front mold connected to a feeding sleeve, a rear mold slidably mounted on a slide rod, and a middle mold connected to the front side of the front mold. The middle mold has a groove, and cooling pipes pass through the middle mold. The cooling pipes are coiled around the outside of the groove. The groove is connected to the front mold, and an ejection hole is provided at the bottom of the groove. The pressure mechanism includes a servo motor fixedly connected to the rear end plate. The servo motor drives a screw mounted on the rear end plate to rotate via a pulley assembly. The screw is threaded into the rear mold. The ejector assembly includes an ejector plate and ejector pins connected to the ejector plate. The ejector plate is slidably disposed in a reserved space between the rear mold and the middle mold, and the ejector pins are matched in the ejector holes.

2. The eyebrow pencil lead forming apparatus according to claim 1, characterized by: Both the front and rear plates are square plates, and there are four sliding rods symmetrically arranged at the four corners of the front and rear plates.

3. The eyebrow pencil lead forming apparatus according to claim 1, characterized by: The geared motor is mounted on the outside of the front end plate via a bracket. A feeding sleeve is installed at the center of the inner side of the front end plate. The spiral part of the screw propeller is rotatably disposed inside the feeding sleeve. The front end of the screw propeller passes through the front end plate and connects to the shaft of the geared motor. The rear end of the screw propeller does not pass through the feeding sleeve.

4. The eyebrow pencil lead forming apparatus according to claim 1, characterized by: The front mold is fixedly connected to the feeding sleeve, and the central channel of the front mold is connected to the hollow channel of the feeding sleeve.

5. The eyebrow pencil lead forming apparatus according to claim 1, characterized by: The intermediate mold has two grooves, and the openings formed by the two grooves on the front side of the intermediate mold through the T-shaped built-in conveying pipe are aligned with the center channel of the front mold.

6. The eyebrow pencil lead forming apparatus according to claim 1, characterized by: The pulley assembly includes a drive pulley mounted on the servo motor shaft, a driven pulley mounted on the screw, and a conveyor belt mounted on the drive pulley and the driven pulley.

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