Heating device of optical mold

Abstract

The utility model provides a heating device of an optical mold, which comprises a base plate, an upper mold and a lower mold, the upper mold is provided with an injection molding hole, the base plate is fixedly provided with a support, the support is fixedly provided with a driving cylinder, the lower mold is provided with a plurality of mold holes, the base plate is provided with an assembly seat corresponding to the mold holes, the assembly seat is fixedly provided with a heating assembly, and the heating assembly is fixedly provided with an air cylinder. The heating assembly comprises a base, a heating pipe and a thermocouple, a sleeve is arranged on the base in an extending mode, the heating pipe is fixedly installed on the sleeve, and the thermocouple is fixedly installed on the base through a screw hole. During operation, the base of the heating assembly is inserted into the mold hole of the lower mold, the thickness of the injection-molded plastic lens is controlled by adjusting the position of the base, the upper mold covers the lower mold, a liquid material is injected through the injection molding hole, and after injection molding is completed, after the plastic lens is cooled and molded, the upper mold is opened, the driving air cylinder is started, and the lower mold is driven to press downwards. The plastic lens formed in the mold hole is ejected out through the base, the plastic lens is rapidly taken out, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology, and specifically relates to a heating device for an optical mold. Background Technology

[0002] A lens is an optical element made of transparent material, with a spherical surface forming part of its plane. Lenses are typically composed of multiple lens elements and are divided into two types: plastic lenses and glass lenses. In the production of plastic lenses, a heating device is needed to heat the mold to ensure quality. However, the presence of the heating device in existing plastic lens molds makes it difficult to remove the molded optical lenses, resulting in low production efficiency.

[0003] Chinese utility model patent CN219903025U discloses a heating device for an optical lens mold, including a heating box, a cover, and a feeding device. The cover is mounted on top of the heating box. Feeding devices are located inside both the heating box and the cover. Fixing devices are installed on both sides of the heating box and the cover. Each fixing device includes a first fixing post, a first rotating rod, and a second fixing post. The first fixing posts are mounted on both sides of the heating box, and a first rotating rod is mounted on the outer side of each first fixing post. A second fixing post is mounted above the first rotating rod, and a second rotating rod is mounted on the outer side of the second fixing post. Telescopic cylinders are installed on both sides inside the cover, and telescopic rods are installed inside each telescopic cylinder. This utility model has a simple structure, is easy to install, saves installation time, and facilitates the removal of the optical lens from the device, saving time and effort and improving production efficiency. However, it is very difficult to handle the molded optical lens, resulting in low production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a heating device for optical molds to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a heating device for an optical mold, comprising a substrate, an upper mold, and a lower mold. The upper mold has injection holes. A support is fixedly mounted on the substrate, and a driving cylinder is fixedly mounted on the support. The driving cylinder drives and connects to the lower mold. The lower mold has multiple mold holes. The substrate has an assembly seat corresponding to the mold holes. A heating component is fixedly mounted on the assembly seat. The heating component includes a base, a heating tube, and a thermocouple. A sleeve extends from the base, and the heating tube is fixedly mounted on the sleeve. The thermocouple is fixedly mounted on the base through a screw hole.

[0006] Preferably, a high-temperature sealing ring is fixedly installed on the side of the base.

[0007] Preferably, thermally conductive silicone is applied between the sleeve and the heating tube.

[0008] Preferably, the support is fixedly installed with a limiting block.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] The lower mold of this utility model has a mold hole, and the base plate has an assembly seat corresponding to the mold hole. The assembly seat is fixedly installed with a heating component, which includes a base, a heating tube, and a thermocouple. The base and the mold hole cooperate to form an injection cavity. The heating tube and the thermocouple cooperate to heat the injection cavity to ensure injection quality. During operation, the base of the heating component is inserted into the mold hole of the lower mold. By adjusting the position of the base, the thickness of the injected plastic lens is controlled. The upper mold covers the lower mold, and liquid material is injected through the injection hole. After injection is completed, the plastic lens is cooled and formed. The upper mold is opened, the drive cylinder is started, and the lower mold is pressed down, so that the base pushes out the plastic lens formed in the mold hole. The plastic lens is quickly removed, improving production efficiency. Attached Figure Description

[0011] Figure 1 This is the first perspective structural view of this utility model.

[0012] Figure 2 This is the second perspective structural view of this utility model.

[0013] Figure 3 This is a structural view of the lower mold of this utility model.

[0014] Figure 4 This is a structural view of the mounting base of the substrate of this utility model.

[0015] Figure 5 This is an exploded structural view of the mounting base of the substrate of this utility model.

[0016] Figure 6 This is a cross-sectional structural view of the assembly base of this utility model.

[0017] The diagram is labeled as follows: 1. Substrate; 2. Upper mold; 3. Lower mold; 4. Injection hole; 5. Support; 6. Drive cylinder; 7. Mold hole; 8. Assembly base; 9. Heating component; 10. Base; 11. Heating tube; 12. Thermocouple; 13. Sleeve; 14. Screw hole; 15. High-temperature sealing ring; 16. Limiting block. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1:

[0020] This utility model provides a heating device for an optical mold, comprising a substrate 1, an upper mold 2, and a lower mold 3. The upper mold 2 has injection holes 4. A support 5 is fixedly mounted on the substrate 1, and a drive cylinder 6 is fixedly mounted on the support 5. The drive cylinder 6 drives and connects to the lower mold 3. The lower mold 3 has multiple mold holes 7. The substrate 1 has an assembly seat 8 corresponding to the mold holes 7. A heating assembly 9 is fixedly mounted on the assembly seat 8. The heating assembly 9 includes a base 10, a heating tube 11, and a thermocouple 12. A sleeve 13 extends from the base 10, and the heating tube 11 is fixedly mounted on the sleeve 13. The thermocouple 12 is fixedly mounted on the base 10 through a screw hole 14. A high-temperature sealing ring 15 is fixedly mounted on the side of the base 10. Thermally conductive silicone is applied between the sleeve 13 and the heating tube 11. A limit block 16 is fixedly mounted on the support 5.

[0021] Through the above technical solution, the lower mold 3 of this utility model is provided with a mold hole 7, and the base plate 1 is provided with an assembly seat 8 corresponding to the mold hole 7. The assembly seat 8 is fixedly installed with a heating component 9, which includes a base 10, a heating tube 11, and a thermocouple 12. The base 10 cooperates with the mold hole 7 to form an injection cavity. The heating tube 11 and the thermocouple 12 cooperate to heat the injection cavity to ensure injection quality. During operation, the base 10 of the heating component 9 is inserted into the mold hole 7 of the lower mold 3. By adjusting the position of the base 10, the thickness of the injected plastic lens is controlled. The upper mold 2 covers the lower mold 3, and liquid material is injected through the injection hole 4. After injection is completed, the plastic lens is cooled and formed. The upper mold 2 is opened, the drive cylinder 6 is started, and the lower mold 3 is pressed down, so that the base 10 pushes out the plastic lens formed in the mold hole 7, and the plastic lens is quickly taken out, improving production efficiency.

[0022] Example 2:

[0023] The heating device in this embodiment comprises three main parts: a base plate 1, an upper mold 2, and a lower mold 3. The base plate 1, serving as the supporting foundation of the entire device, is made of metal and possesses sufficient rigidity and stability. A support 5, welded from high-strength steel, is fixedly mounted on the base plate 1, capable of withstanding significant mechanical loads. A drive cylinder 6, a standard industrial cylinder, is fixedly mounted on the support 5, achieving precise linear motion through pneumatic drive. The output end of the drive cylinder 6 is directly connected to the lower mold 3, enabling it to move the lower mold 3 up and down.

[0024] The lower mold 3 is manufactured using high-precision machining technology, and its surface undergoes special treatment to ensure flatness and smoothness. The lower mold 3 has multiple regularly arranged mold holes 7, the shape and size of which are determined according to the specifications of the optical lenses to be produced. The inner walls of the mold holes 7 are polished to ensure the surface quality of the formed lenses. A mounting seat 8 is provided on the substrate 1 corresponding to the position of each mold hole 7. These mounting seats 8 are fixed to the substrate 1 with bolts, and their positions can be finely adjusted to ensure precise alignment with the mold holes 7.

[0025] The heating assembly 9 is the core component of the device, and each mounting base 8 is equipped with an independent heating assembly 9. The heating assembly 9 consists of three main parts: a base 10, a heating tube 11, and a thermocouple 12. The base 10 is made of a metal material with good thermal conductivity, and a sleeve 13 extends from its upper part. The heating tube 11 is fixedly installed inside the sleeve 13. The heating tube 11 uses the principle of resistance heating; when energized, it generates heat and conducts it through the sleeve 13. The base 10 has a screw hole 14, and the thermocouple 12 is fixed to the base 10 by a threaded connection for real-time temperature monitoring.

[0026] The upper mold 2 is mounted above the base plate 1, corresponding to the lower mold 3. The upper mold 2 is provided with an injection hole 4 for injecting molten plastic material. The contact surfaces of the upper mold 2 and the lower mold 3 are precision machined to ensure sealing when the mold is closed. When the device is working, the upper mold 2 and the lower mold 3 close to form a sealed cavity, and the heating component 9 precisely controls the temperature of the cavity.

[0027] The working principle of this device is as follows: First, the lower mold 3 is adjusted to a suitable position so that the base 10 and the mold hole 7 of the lower mold 3 form a precise fit. The heating system is started, and the heating tube 11 conducts heat to the base 10 through the sleeve 13. Thermocouple 12 monitors the temperature in real time and feeds it back to the control system. When the temperature reaches the set value, molten plastic is injected through the injection hole 4 of the upper mold 2. The plastic maintains a suitable temperature in the heated cavity to ensure molding quality. After molding is completed, the drive cylinder 6 pushes the lower mold 3 downward, causing the base 10 to eject the molding lens from the mold hole 7, achieving automatic demolding. The entire process features precise temperature control and smooth demolding, effectively improving production efficiency.

[0028] Example 3:

[0029] In this embodiment, the upper mold 2 is provided with injection holes 4, the base plate 1 is fixedly mounted with a support 5, the support 5 is fixedly mounted with a drive cylinder 6, the drive cylinder 6 drives and connects to the lower mold 3, the lower mold 3 is provided with multiple mold holes 7, the base plate 1 is provided with an assembly seat 8 corresponding to the mold holes 7, the assembly seat 8 is fixedly mounted with a heating component 9, the heating component 9 includes a base 10, a heating tube 11 and a thermocouple 12, the base 10 extends with a sleeve 13, the sleeve 13 is fixedly mounted with the heating tube 11, the base 10 is provided with a screw hole 14 to fixally mount the thermocouple 12. A high-temperature sealing ring 15 is fixedly mounted on the side of the base 10, the high-temperature sealing ring 15 is made of high-temperature resistant silicone rubber material, which has excellent heat resistance and elastic recovery performance.

[0030] The high-temperature sealing ring 15 fits tightly between the side of the base 10 and the inner wall of the mold hole 7, forming a reliable sealing structure. When the base 10 is inserted into the mold hole 7 of the lower mold 3, the high-temperature sealing ring 15 is compressed and deformed, generating radial elastic force to ensure tight contact between the base 10 and the inner wall of the mold hole 7. This sealing structure effectively prevents molten plastic from leaking through the gap between the base 10 and the mold hole 7 during injection molding, ensuring the stability of the injection molding process and product quality.

[0031] During the heating process, the high-temperature sealing ring 15 can withstand the high-temperature environment generated by the heating tube 11 and maintain stable sealing performance. After injection molding is completed, when the driving cylinder 6 drives the lower mold 3 to move down, the high-temperature sealing ring 15 can still maintain a good sealing state, preventing residual plastic melt from seeping into the gap between the base 10 and the mold hole 7, thus avoiding mold contamination or affecting the quality of the next injection molding.

[0032] The high-temperature sealing ring 15 is installed using an interference fit, and is fixed in the annular groove on the side of the base 10 by pre-compression. This installation method ensures both a firm fixation of the sealing ring and prevents it from shifting or falling off under high-temperature operating conditions. The sealing ring has a circular cross-sectional shape, which allows it to generate a uniform radial sealing force under pressure, improving the sealing effect.

[0033] When the mold opens and closes, the high-temperature sealing ring 15 can adapt to the relative movement between the base 10 and the mold hole 7, maintaining good following performance. After multiple opening and closing cycles, the sealing ring can still maintain its original elasticity and sealing performance, and will not undergo permanent deformation or seal failure due to repeated compression.

[0034] During the injection molding process, the high-temperature sealing ring 15 not only serves a sealing function but also absorbs vibrations during mold operation to a certain extent, reducing noise and improving the stability of mold operation. Simultaneously, the presence of the sealing ring reduces direct friction between the base 10 and the inner wall of the mold hole 7, helping to extend the mold's service life.

[0035] When the sealing ring needs to be replaced, simply remove the old sealing ring from the annular groove on the side of the base 10 and press the new sealing ring in. The maintenance operation is simple and quick. This design greatly reduces the maintenance cost and time cost of the mold and improves production efficiency.

[0036] Example 4:

[0037] In this embodiment, a support 5 is fixedly mounted on the substrate 1, and a drive cylinder 6 is fixedly mounted on the support 5. The drive cylinder 6 is drivenly connected to the lower mold 3. The lower mold 3 has multiple mold holes 7, and an assembly seat 8 is correspondingly provided on the substrate 1. A heating component 9 is fixedly mounted on the assembly seat 8. The heating component 9 consists of a base 10, a heating tube 11, and a thermocouple 12. The base 10 extends to provide a sleeve 13, and the heating tube 11 is fixedly mounted inside the sleeve 13. The base 10 has screw holes 14 for fixing the thermocouple 12.

[0038] A thermally conductive silicone layer is applied to the contact surface between the sleeve 13 and the heating tube 11. The thermally conductive silicone has excellent thermal conductivity, effectively filling the tiny gaps between the inner wall of the sleeve 13 and the outer wall of the heating tube 11, eliminating thermal resistance caused by air gaps. When the heating tube 11 is working, the generated heat is rapidly conducted to the sleeve 13 through the thermally conductive silicone, and then evenly distributed from the sleeve 13 to the entire base 10. This structural design significantly improves heat conduction efficiency and reduces heat loss.

[0039] The base 10 mates with the mold hole 7 of the lower mold 3 to form an injection cavity. When the heating element 11 is energized, heat is transferred to the base 10 through the thermally conductive silicone and the sleeve 13, allowing the injection cavity to quickly reach the required temperature. Thermocouple 12 monitors the temperature in real time to ensure precise control of the injection temperature. The application of thermally conductive silicone allows the heat from the heating element 11 to be transferred to the injection cavity more efficiently, shortening the preheating time and improving energy utilization.

[0040] During the injection molding process, the upper mold 2 covers the lower mold 3, and liquid plastic material is injected through the injection hole 4. Because the thermally conductive silicone improves heating efficiency, the injection chamber maintains a stable temperature distribution, ensuring uniform heating of the plastic material and improving injection molding quality. After the plastic cools and solidifies, the drive cylinder 6 drives the lower mold 3 to move downwards, and the base 10 ejects the formed optical lens from the mold hole 7, achieving rapid demolding.

[0041] The addition of a thermally conductive silicone layer not only improves heating efficiency but also provides a certain degree of cushioning, absorbing vibrations generated during the operation of the heating element 11 and reducing impact on the mold. Furthermore, the thermally conductive silicone has excellent high-temperature resistance, enabling it to operate stably in high-temperature environments for extended periods without failing or releasing harmful substances due to high temperatures.

[0042] This embodiment optimizes the heat conduction structure between the sleeve 13 and the heating tube 11, using thermally conductive silicone as the heat transfer medium, significantly improving heating efficiency and ensuring the uniformity and stability of the injection molding temperature. Simultaneously, this structural design is simple, reliable, and easy to implement, effectively improving the production efficiency and quality of optical lenses.

[0043] Example 5:

[0044] In this embodiment, a limiting block 16 is fixedly installed on the support 5. The limiting block 16 is fixed to the side wall of the support 5 by bolts, and the upper surface of the limiting block 16 maintains a preset distance from the bottom of the lower template. When the drive cylinder 6 pushes the lower template upward, the top of the lower template will contact the upper surface of the limiting block 16, thereby limiting the rising height of the lower template. By adjusting the fixed position of the limiting block 16 on the support 5, the maximum rising stroke of the lower template can be precisely controlled.

[0045] In practice, the installation position of the limiting block 16 determines the depth of the fit between the base 10 and the mold hole 7. When producing thinner lenses, the limiting block 16 is adjusted to a lower position, reducing the rising height of the lower mold plate. In this case, the base 10 inserts into the mold hole 7 to a smaller depth, resulting in a smaller injection molding cavity. Conversely, when producing thicker lenses, the limiting block 16 is adjusted to a higher position, allowing the lower mold plate to rise to a higher position. In this case, the base 10 inserts into the mold hole 7 to a deeper depth, thereby increasing the depth of the injection molding cavity.

[0046] The adjustment mechanism of the limiting block 16 is fixed with bolts. During the actual injection molding process, the base 10 of the heating component 9 and the mold hole 7 form a sealed injection cavity. By precisely controlling the position of the limiting block 16, the consistency of the cavity depth during each injection can be ensured, thereby guaranteeing uniform lens thickness in mass production. After injection molding is completed, the drive cylinder 6 moves the lower mold plate downward, causing the base 10 to exit the mold hole 7, and simultaneously ejecting the molded lens, achieving automatic demolding.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A heating device for an optical mold, comprising a substrate, an upper mold, and a lower mold, wherein the upper mold is provided with an injection hole, characterized in that, The substrate is fixedly mounted with a support, and the support is fixedly mounted with a driving cylinder. The driving cylinder drives and connects to the lower mold. The lower mold has multiple mold holes. The substrate has an assembly seat corresponding to the mold holes. The assembly seat is fixedly mounted with a heating component. The heating component includes a base, a heating tube, and a thermocouple. The base extends with a sleeve, and the sleeve is fixedly mounted with the heating tube. The base is provided with a screw hole for fixedly mounting the thermocouple.

2. The heating device for an optical mold according to claim 1, characterized in that, A high-temperature sealing ring is fixedly installed on the side of the base.

3. The heating device for an optical mold according to claim 1, characterized in that, Thermally conductive silicone is applied between the sleeve and the heating tube.

4. The heating device for an optical mold according to claim 1, characterized in that, The support is fixedly installed with a limit block.

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