Batch injection molding track discharging system of contact lens single mold

Abstract

The present invention relates to a contact lens single mold batch injection molding track discharging system, which comprises an upper injection molding machine and a lower injection molding machine, and each of the upper injection molding machine and the lower injection molding machine comprises an injection molding assembly, a vacuum assembly and a temperature control assembly, a female mold transfer assembly is installed at the discharging end of the upper injection molding machine, and a male mold transfer assembly is installed at the discharging end of the lower injection molding machine and used for clamping and transferring corresponding molds. The female mold clamping assembly is mounted on the lower side of the male mold clamping assembly, and the male mold and the female mold are mutually overlapped to form a mold after being transferred along with the respective clamping assemblies; a conveying assembly is installed on the lower side of the female die clamping assembly and used for conveying a die. A track device is mounted at one end of the conveying assembly, and an assembling mechanism is mounted on the opposite side; a jig disc is movably mounted on the track device; after the die is conveyed to the position above the assembling mechanism along with the conveying assembly, the assembling mechanism presses the die into the jig disc. According to the contact lens mold assembling and discharging device, automatic transferring, assembling and discharging of contact lens molds are achieved, the production efficiency is improved, and the manual operation cost is reduced.

Description

Technical Field

[0001] The invention relates to a batch injection molding track discharging system for a single contact lens mold. Background Art

[0002] Contact lenses are a common vision correction and cosmetic product. Their production process and quality control have a crucial impact on their comfort, oxygen permeability, and visual quality. Injection molding is a key process in contact lens production, and mold design, transfer, and assembly directly impact production efficiency and product quality.

[0003] Currently, contact lens production typically utilizes an injection molding process involving the use of a male and female mold. For example, CN119871822A discloses a device for injection molding contact lens male and female shell membranes using a common mold. The device comprises an upper mold consisting of an upper fixed plate, a female mold core, and a female mold block, and a lower mold consisting of a lower fixed plate, a male mold core, and a top block. Precise positioning is achieved through a 0° positioning block, positioning grooves, guide sleeves, and guide posts, ensuring precise mold fit. This technical solution improves the matching accuracy and production efficiency of the male and female contact lens shell membranes by optimizing the mold structure and injection molding process.

[0004] However, there are still some problems in the existing technology: First, in the transfer process of the male and female molds, a single transmission method is often used, which lacks efficient batch processing capabilities, resulting in low mold transfer efficiency; second, the precise alignment and overlapping assembly of the male and female molds rely on manual operation or simple mechanical devices, which makes it difficult to ensure assembly accuracy and efficiency.

[0005] Therefore, there is an urgent need for a system that can achieve efficient batch injection molding, precise mold transfer and automated assembly to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art and provide a track discharge system for batch injection molding of a single contact lens mold, thereby solving the problem of low mold transfer and assembly efficiency during the contact lens production process, improving the degree of production automation and precision assembly capabilities. This purpose of the present invention is achieved by:

[0007] The present invention proposes a batch injection molding track discharge system for a single mold of contact lenses, comprising an upper injection molding machine and a lower injection molding machine, wherein the upper injection molding machine comprises an injection molding component, a vacuum component and a temperature control component, and the lower injection molding machine comprises an injection molding component, a vacuum component and a temperature control component, wherein the injection molding component is used for injection molding, the vacuum component is used for controlling the vacuum degree inside the injection molding component, and the temperature control component is used for controlling the injection molding temperature inside the injection molding component, the discharge end of the upper injection molding machine is equipped with a transfer component, the mother mold transfer component is used for clamping and transferring the mother mold, the discharge end of the lower injection molding machine is equipped with a transfer component, and the mother mold The transfer assembly is used to clamp and transfer the male mold. The female mold clamping assembly is installed on the lower side of the male mold clamping assembly. The male mold and the female mold overlap with each other to form a mold as the female mold clamping assembly and the male mold assembly are transferred. A conveying assembly is installed on the lower side of the female mold clamping assembly. The conveying assembly is used to convey the mold. A track device is installed at one end of the conveying assembly. An assembly mechanism is installed on the opposite side of the track device. A jig disk is movably installed on the track device. The track device is used to convey the jig disk. After the mold is transported to the top of the assembly mechanism along with the conveying assembly, the assembly mechanism presses the mold into the jig disk.

[0008] Furthermore, the female mold transfer assembly and the male mold transfer assembly both include a drive motor and a transfer disc. The transfer disc rotates driven by the drive motor. A plurality of transfer holes are provided on the transfer disc. The transfer holes are used to carry the female mold and the male mold. The transfer holes are distributed in a circular array on the transfer disc.

[0009] Furthermore, the diameter of the transfer disc is 20 cm, the drive motor is arranged at the lower part of the transfer disc, and the drive motor is connected to the transfer disc through a rotating shaft.

[0010] Furthermore, the female mold clamping assembly and the male mold clamping assembly both include a driving motor, a transfer disk and a first unloading unit. The transfer disk rotates driven by the driving motor. A plurality of transfer holes are provided on the transfer disk. The transfer holes are distributed in a circular array on the transfer disk. The first unloading unit is installed on the upper part of the transfer disk. The first unloading unit is used to push the mold away from the transfer disk to the transfer disk.

[0011] Furthermore, the diameter of the transfer disc is 50 cm, the drive motor is arranged at the lower part of the transfer disc, the drive motor is connected to the transfer disc through a rotating shaft, the female mold clamping assembly and the male mold clamping assembly are partially overlapped in the vertical direction, and a second unloading unit is installed on the upper part of the male mold clamping assembly, and the second unloading unit is used to push the female mold and the male mold away from the female mold clamping assembly and the male mold clamping assembly and then overlap them on the conveying assembly.

[0012] Furthermore, the conveying component includes a circulating conveyor belt, and a plurality of transfer holes are opened on the circulating conveyor belt, and the transfer holes are linearly and equidistantly distributed on the circulating conveyor belt.

[0013] Furthermore, the assembly component includes a supporting device, one end of which is fixed with a pressure device, and the pressure device includes a driving motor and a telescope, and the driving motor is used to drive the telescope to drive the telescope to transfer the mold to the fixture plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the female mold and the male mold are respectively injected by the upper injection molding machine and the lower injection molding machine, and the automatic discharge of the mold is realized through their respective transfer components, thereby overcoming the defect that the mold transfer in traditional contact lens production relies on manual operation; the coordinated work of the female mold clamping component and the male mold clamping component enables the male mold and the female mold to be accurately overlapped into a complete mold, thereby improving the accuracy of mold assembly; the cooperation of the transmission component with the track device and the assembly mechanism realizes the automated assembly process from the mold to the fixture tray, greatly improving production efficiency; the entire system realizes a fully automated process from injection molding, transfer to assembly, significantly improving the degree of automation and production stability of contact lens production, and compared with traditional production methods, the production efficiency is increased by about 30%, and the mold assembly accuracy is increased by about 20%. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of a track discharge system for batch injection molding of a single mold for contact lenses;

[0016] In the figure: 1. Upper injection molding machine, 2. Injection molding assembly, 3. Vacuum assembly, 4. Temperature control assembly, 5. Mother mold transfer assembly, 6. First unloading unit, 7. Mother mold clamping assembly, 8. Conveying assembly, 9. Assembly assembly, 10. Track device, 11. Second unloading unit, 12. Male mold transfer assembly, 13. Male mold clamping assembly, 14. Lower injection molding machine, 15. Fixture tray. DETAILED DESCRIPTION

[0017] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0018] Example 1

[0019] Please see Figure 1A contact lens single mold batch injection molding track discharge system includes an upper injection molding machine 1 and a lower injection molding machine 14. The upper injection molding machine 1 includes an injection molding component 2, a vacuum component 3 and a temperature control component 4. The lower injection molding machine 14 includes an injection molding component 2, a vacuum component 3 and a temperature control component 4. The injection molding component 2 is used to inject the mold. The vacuum component 3 is used to control the vacuum degree inside the injection molding component 2. The temperature control component 4 is used to control the injection temperature inside the injection molding component 2. The discharge end of the upper injection molding machine 1 is equipped with a mother mold transfer component 5, which is used to clamp and transfer Move the female mold, and the discharge end of the lower injection molding machine 14 is equipped with a male mold transfer assembly 12, which is used to clamp and transfer the male mold. The female mold transfer assembly 5 and the male mold transfer assembly 12 both include a drive motor and a transfer disc. The transfer disc rotates driven by the drive motor. A number of transfer holes are provided on the transfer disc. The transfer holes are used to carry the female mold and the male mold. The transfer holes are distributed in a circular array on the transfer disc. The diameter of the transfer disc is 20 cm. The drive motor is located at the lower part of the transfer disc, and the drive motor is connected to the transfer disc through a rotating shaft.

[0020] As can be understood, the female mold clamping assembly 7 is mounted on the lower side of the male mold clamping assembly 13. The male and female molds overlap to form a mold as the female mold clamping assembly 7 and the male mold assembly are transferred. The female mold clamping assembly 7 and the male mold clamping assembly 13 both include a drive motor, a transfer disc, and a first unloading unit 6. The transfer disc rotates under the drive motor. The transfer disc is provided with a plurality of transfer holes distributed in a circumferential array on the transfer disc. The first unloading unit 6 is mounted on the upper portion of the transfer disc and is used to push the mold off the transfer disc and onto the transfer disc. The diameter of the transfer disc is 50 cm. The drive motor is located at the lower part of the transfer disc. The drive motor is connected to the transfer disc through a rotating shaft. The female mold clamping assembly 7 and the male mold clamping assembly 13 partially overlap in the vertical direction. A second blanking unit 11 is installed on the upper part of the male mold clamping assembly 13. The second blanking unit 11 is used to push the female mold and the male mold away from the female mold clamping assembly 7 and the male mold clamping assembly 13 and then overlap them on the conveying assembly 8.

[0021] It can be understood that a conveying assembly 8 is installed on the lower side of the master mold clamping assembly 7, and the conveying assembly 8 is used to convey the mold. The conveying assembly 8 includes a circulating conveyor belt, and a plurality of transfer holes are opened on the circulating conveyor belt. The transfer holes are linearly and equidistantly distributed on the circulating conveyor belt. A track device 10 is installed at one end of the conveying assembly 8, and an assembly mechanism is installed on the opposite side of the track device 10. A jig disk is movably installed on the track device 10, and the track device 10 is used to convey the jig disk. After the mold is transported to the top of the assembly mechanism along with the conveying assembly 8, the assembly mechanism presses the mold into the jig disk 15. The assembly assembly 9 includes a supporting device, and a pressure device is fixed to one end of the supporting device. The pressure device includes a drive motor and a telescope. The drive motor is used to drive the telescope to drive the telescope to transfer the mold to the jig disk 15.

[0022] In the present embodiment, upper injection molding machine 1 and lower injection molding machine 14 are respectively used for the female mold and male mold of injection molding production of contact lenses. The injection molding assembly 2 of upper injection molding machine 1 is provided with the mold cavity of the female mold inside, and the injection molding assembly 2 of lower injection molding machine 14 is provided with the mold cavity of the male mold inside. Vacuum assembly 3 is communicated with the inside of injection molding assembly 2 through a vacuum pump, and can regulate the vacuum degree inside injection molding assembly 2, ensure that bubbles are not generated during the injection molding process, and improve the quality of contact lens mold. Temperature control assembly 4 comprises a heating element and a temperature sensor, and the heating element is used for heating the mold cavity inside injection molding assembly 2, and the temperature sensor is used for detecting the temperature inside the mold cavity. Temperature control assembly 4 regulates the temperature inside the mold cavity by controlling the power of the heating element, ensures that the injection temperature is stabilized within the temperature range suitable for the molding of contact lens materials.

[0023] As will be appreciated, the structures of the female mold transfer assembly 5 and the male mold transfer assembly 12 are similar, both utilizing a transfer disc. The transfer disc is evenly distributed with eight transfer holes, each slightly larger than the diameter of the mold, to facilitate mold placement and removal. The transfer disc is connected to a drive motor via a rotating shaft. The drive motor controls the rotational speed and angle of the transfer disc, enabling precise positioning and accurate transfer of the mold to the next station. The drive motor utilizes a servo motor with high-precision angle control capabilities, ensuring accuracy during the transfer process.

[0024] As can be understood, the structures of the female mold clamping assembly 7 and the male mold clamping assembly 13 are also similar, and both adopt a transfer tray structure. There are 12 transfer holes evenly distributed on the transfer tray, and the diameter of the transfer hole is slightly larger than the diameter of the mold, which is convenient for the placement and removal of the mold. The transfer tray is connected to the drive motor through a rotating shaft, and the drive motor can control the rotation speed and angle of the transfer tray so that the transfer tray can be accurately positioned and the mold is accurately transferred to the next station. The first blanking unit 6 includes a push rod and a cylinder, and the cylinder drives the push rod to push the mold from the transfer disc into the transfer hole of the transfer tray. The second blanking unit 11 also includes a push rod and a cylinder, and the cylinder drives the push rod to push the female mold and the male mold out of the female mold clamping assembly 7 and the male mold clamping assembly 13, so that they overlap on the conveying assembly 8 to form a complete mold.

[0025] As will be appreciated, the conveyor assembly 8 utilizes an endless conveyor belt structure with 20 transfer holes evenly distributed throughout the belt. The diameter of the transfer holes is slightly larger than the diameter of the mold, facilitating mold placement and transfer. Driven by a motor, the endless conveyor belt continuously transports molds from the female mold clamping assembly 7 and the male mold clamping assembly 13 to the assembly mechanism.

[0026] As will be understood, the track assembly 10 comprises two parallel tracks with several rollers mounted on them. The tooling tray rests on these rollers and can move along the tracks. One end of the track assembly 10 is connected to the conveyor assembly 8, and the other end extends below the assembly mechanism. The tooling tray is provided with several grooves for accommodating the molds. The grooves are shaped to match the molds, facilitating their placement and securement.

[0027] As will be understood, the assembly mechanism includes a support device and a pressure device. The support device is a stable frame structure that supports the pressure device. The pressure device includes a drive motor and a telescope. The drive motor is connected to the telescope via a gear transmission mechanism. When the drive motor rotates, the gear transmission mechanism drives the telescope to expand and contract. A pressure head is provided at the end of the telescope. The shape of the pressure head matches the shape of the mold. When the mold is transported to the top of the assembly mechanism along with the conveyor assembly 8, the drive motor drives the telescope to extend downward, and the pressure head presses the mold into the groove of the tooling plate, completing the mold assembly process.

[0028] In one possible usage scenario, the upper injection molding machine 1 and the lower injection molding machine 14 operate simultaneously, producing the female mold and the male mold, respectively. The female mold and the male mold are transferred to the female mold clamping assembly 7 and the male mold clamping assembly 13, respectively, via the female mold transfer assembly 5 and the male mold transfer assembly 12. After the female mold clamping assembly 7 and the male mold clamping assembly 13 align the female mold and the male mold, they are pushed out through the second unloading unit 11 so that they overlap on the conveying assembly 8 to form a complete mold. The conveying assembly 8 conveys the mold to the top of the assembly mechanism, which presses the mold into the groove of the jig plate, completing the mold assembly process. The jig plate moves along the track device 10, conveying the assembled mold to the next process.

[0029] This contact lens single mold batch injection track discharge system produces a female mold and a male mold respectively through the upper and lower injection molding machines 14, and then assembles the female mold and the male mold into a complete mold through the transfer component, the clamping component, the conveying component 8 and the assembly mechanism, and assembles the mold into a jig tray, thereby realizing the automated production and assembly of contact lens molds, improving production efficiency, reducing labor costs, and also improving product quality and consistency.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A track discharging system for batch injection molding of a single mold for contact lenses, characterized in that: The upper injection molding machine comprises an upper injection molding machine and a lower injection molding machine, wherein the upper injection molding machine comprises an injection molding component, a vacuum component and a temperature control component, and the lower injection molding machine comprises an injection molding component, a vacuum component and a temperature control component, wherein the injection molding component is used for injection molding, the vacuum component is used for controlling the vacuum degree inside the injection molding component, and the temperature control component is used for controlling the injection molding temperature inside the injection molding component. The discharge end of the upper injection molding machine is equipped with a transfer component, and the female mold transfer component is used for clamping and transferring the female mold. The discharge end of the lower injection molding machine is equipped with a transfer component, and the male mold transfer component is used for clamping and transferring the male mold. The female mold clamping assembly is installed on the lower side of the male mold clamping assembly. The male mold and the female mold overlap with each other to form a mold as the female mold clamping assembly and the male mold assembly are transferred. A conveying assembly is installed on the lower side of the female mold clamping assembly. The conveying assembly is used to convey the mold. A track device is installed at one end of the conveying assembly. An assembly mechanism is installed on the opposite side of the track device. A jig disk is movably installed on the track device. The track device is used to convey the jig disk. After the mold is transported to the top of the assembly mechanism along with the conveying assembly, the assembly mechanism presses the mold into the jig disk.

2. The track discharging system for batch injection molding of a single contact lens mold according to claim 1, characterized in that: The female mold transfer assembly and the male mold transfer assembly both include a drive motor and a transfer disc. The transfer disc rotates driven by the drive motor. A plurality of transfer holes are provided on the transfer disc. The transfer holes are used to carry the female mold and the male mold. The transfer holes are distributed in a circular array on the transfer disc.

3. The track discharging system for batch injection molding of a single contact lens mold according to claim 2, characterized in that: The diameter of the transfer disc is 20 cm. The drive motor is arranged at the lower part of the transfer disc and is connected to the transfer disc via a rotating shaft.

4. The track discharging system for batch injection molding of a single contact lens mold according to claim 2, characterized in that: The female mold clamping assembly and the male mold clamping assembly both include a driving motor, a transfer disk and a first unloading unit. The transfer disk rotates driven by the driving motor. A plurality of transfer holes are provided on the transfer disk. The transfer holes are distributed in a circular array on the transfer disk. The first unloading unit is installed on the upper part of the transfer disk. The first unloading unit is used to push the mold away from the transfer disk to the transfer disk.

5. The track discharging system for batch injection molding of a single contact lens mold according to claim 4, characterized in that: The diameter of the transfer disc is 50 cm. The drive motor is arranged at the lower part of the transfer disc. The drive motor is connected to the transfer disc through a rotating shaft. The female mold clamping assembly and the male mold clamping assembly partially overlap in the vertical direction. A second blanking unit is installed on the upper part of the male mold clamping assembly. The second blanking unit is used to push the female mold and the male mold away from the female mold clamping assembly and the male mold clamping assembly and then overlap them on the conveying assembly.

6. The track discharging system for batch injection molding of a single contact lens mold according to claim 5, characterized in that: The conveying component includes a circulating conveyor belt, and a plurality of transfer holes are opened on the circulating conveyor belt. The transfer holes are linearly and equidistantly distributed on the circulating conveyor belt.

7. The track discharging system for batch injection molding of a single contact lens mold according to claim 6, characterized in that: The assembly component includes a supporting device, one end of which is fixed with a pressure device, and the pressure device includes a driving motor and a telescope. The driving motor is used to drive the telescope to drive the telescope to transfer the mold to the fixture plate.

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