A mould pressing machine upper die quenching device

Abstract

The application belongs to the technical field of molding machine equipment, and particularly relates to a die quenching device of a molding machine. The die quenching device comprises a first driving cylinder, a guide assembly connected with an output end of the first driving cylinder, a connecting seat connected with the first driving cylinder through the guide assembly, and a cooling plate connected with the connecting seat. The first driving cylinder drives the cooling plate to ascend and descend through the connecting seat. The guide assembly is used for guiding the ascending and descending of the cooling plate. The bottom of the cooling plate is provided with a fitting surface which is fitted with the upper surface of a special-shaped die. The bottom of the cooling plate is provided with the fitting surface which is fitted with the special-shaped die, the contact area of the cooling plate and the die is greatly increased, the heat exchange efficiency is significantly improved, and the cooling period is shortened.

Description

Technical Field This application belongs to the technical field of molding machine equipment, specifically relating to a rapid cooling device for the upper mold of a molding machine. Background Technology During glass molding, after the mold and glass preform undergo high-temperature heating and pressure forming, they must undergo a rigorous cooling process to eliminate internal stress in the glass and reduce the mold temperature to a safe range for mold opening and part removal. Existing glass molding machines and their associated cooling devices are mainly designed for traditional aspherical lenses, flat glass, and other regularly shaped products. Therefore, existing conventional rapid cooling devices typically use a planar cooling head that conducts heat through contact with the upper surface of the mold by vertical downward pressure.

[0001] However, when using conventional planar quenching devices to process irregularly shaped molds, especially those for prisms, the upper mold is typically not a flat-topped structure due to the special geometry of prisms and similar products. Instead, it usually has a specific angle, such as a ridge-like structure with a 90° angle. If existing planar cooling plates are used directly for quenching these irregularly shaped molds: Flat cooling plates cannot make surface contact with the angled upper surface of the mold, often only contacting the edge of the mold top or a very small area, resulting in extremely low heat exchange efficiency, which cannot meet the process requirements of rapid cooling. Furthermore, the extremely small contact area can lead to excessive local temperature differences in the mold, affecting product quality. At the same time, the local pressure of the flat pressure head on the mold tip is too great, which can easily damage expensive precision molds or cause internal glass products to crack due to uneven stress. Utility Model Content In order to solve the problem that the planar rapid cooling device of the existing molding press cannot effectively fit with the upper mold of irregular molds with angles such as prisms, resulting in low cooling efficiency, this application provides a rapid cooling device for the upper mold of the molding press.

[0002] This application is achieved through the following technical solution: A rapid cooling device for the upper mold of a molding press includes a first driving cylinder, a guide assembly connected to the output end of the first driving cylinder, a connecting seat connected to the first driving cylinder through the guide assembly, and a cooling plate connected to the connecting seat. The first driving cylinder drives the cooling plate to rise and fall through the connecting seat. The guide assembly is used to guide the rise and fall of the cooling plate. The bottom of the cooling plate is provided with a fitting surface that fits the upper surface of the irregular mold.

[0003] The above-mentioned mold cooling device for the upper mold of the molding press further includes a cooling water pipe connected to the cooling plate. The cooling plate has a water cooling channel inside that communicates with the cooling water pipe, and the mold is cooled by water cooling.

[0004] As described above, in the rapid cooling device for the upper mold of the molding machine, an elastic buffer mechanism is provided between the connecting seat and the cooling plate, and the elastic buffer mechanism includes a stop screw and a buffer spring.

[0005] As described above, in the rapid cooling device for the upper mold of the molding press, when the stroke of the first drive cylinder is small, the cooling plate adheres to the mold by its own weight and the pressure of the buffer spring; when the stroke of the first drive cylinder is increased, the cooling plate adheres to the mold by the pressure of the first drive cylinder.

[0006] In the above-described rapid cooling device for the upper mold of the molding machine, the first drive cylinder is a low-friction cylinder with adjustable stroke.

[0007] As described above, the upper mold rapid cooling device of the molding machine includes a first linear bearing and a second linear bearing disposed on the upper plate of the molding machine, and a first optical axis and a second optical axis respectively cooperating with the first linear bearing and the second linear bearing.

[0008] As described above, in the rapid cooling device for the upper mold of the molding machine, the contact surface of the cooling plate has a symmetrical V-shaped structure to adapt to the upper mold.

[0009] As described above, in the rapid cooling device for the upper mold of the molding machine, a sealing ring is provided between the first optical axis and the first linear bearing, and between the second optical axis and the second linear bearing, to prevent air leakage from the furnace cavity of the molding machine.

[0010] As described above, in the rapid cooling device for the upper mold of the molding press, the mating surface is provided with a venting groove to prevent the cooling plate from sticking to the upper mold.

[0011] As described above, in the upper mold quenching device of the molding machine, the mating surface has a predetermined angle α adapted to the irregular mold, wherein 45°≤α≤135°.

[0012] Compared with the prior art, this application has the following advantages: 1. Conventional quenching devices have a planar structure and cannot fit the prism mold. The cooling plate of this solution has a fitting surface at the bottom that is adapted to the irregular mold, which greatly increases the contact area between the cooling plate and the mold, significantly improves the heat exchange efficiency, and shortens the cooling cycle.

[0013] 2. An elastic buffer mechanism was designed, providing two contact modes: flexible contact using its own weight and spring force when the cylinder stroke is short, and rigid contact using cylinder pressure when strong cooling is required. This design can meet the needs of different cooling rates while preventing rigid impacts from damaging the precision prism mold.

[0014] 3. A linear bearing is used in conjunction with an optical axis for guidance, and a sealing ring is provided. This ensures the vertical lifting accuracy of the quench head while effectively preventing nitrogen leakage in the furnace cavity and maintaining the stability of the process environment. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a front view of an embodiment of this application; Figure 2 yes Figure 1 Side view A; Figure 3 yes Figure 1 A bottom view; Figure 4 yes Figure 3 Cross-sectional view at point AA. Detailed Implementation To make the technical problems solved by this application, the technical solutions, and the beneficial effects clearer, this application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0016] Please see Figures 1 to 4 A rapid cooling device for the upper mold of a molding press includes a first drive cylinder 611, a guide assembly 612 connected to the output end of the first drive cylinder 611, a connecting seat 613 connected to the first drive cylinder 611 through the guide assembly 612, and a cooling plate 614 connected to the connecting seat 613. The first drive cylinder 611 drives the cooling plate 614 to rise and fall through the connecting seat 613. The guide assembly 612 is used to guide the rise and fall of the cooling plate 614. The bottom of the cooling plate 614 is provided with a fitting surface 6141 that fits the upper surface of the irregular mold.

[0017] In this embodiment, the device uses a first drive cylinder 611, preferably a low-friction cylinder with adjustable stroke, as the power source to drive the cooling plate 614 to descend vertically via the connecting seat 613. During this process, the guide component 612, preferably composed of a linear bearing and an optical axis combination mounted on the upper plate of the molding machine, precisely guides the movement to ensure that the cooling plate is pressed down smoothly without lateral displacement. Its core beneficial effect is that the contact surface 6141 at the bottom of the cooling plate 614 is designed as a non-planar structure that highly matches the shape of the upper surface of irregular molds such as prisms. Compared with conventional planar cooling devices, this significantly increases the contact area between the cooling plate and the mold, thereby greatly improving the heat exchange efficiency, achieving rapid cooling, and preventing the glass product from cracking due to excessive local temperature differences.

[0018] Furthermore, as a preferred embodiment of this solution and not a limitation, it also includes a cooling water pipe 615 connected to the cooling plate 614. The cooling plate 614 has a water cooling channel 6142 inside that communicates with the cooling water pipe 615, and the mold is cooled by water cooling.

[0019] In this embodiment, the working principle of the cooling water circuit structure is to use an external circulating cooling water system to introduce low-temperature cooling water into the water-cooled flow channel 6142 inside the cooling plate 614 through the cooling water pipe 615 for circulation. When the cooling plate 614 contacts the upper surface of the high-temperature mold under the action of the driving mechanism, the heat of the mold is rapidly conducted to the cooling plate 614 and carried away by the continuously flowing cooling water in the flow channel, thereby achieving heat exchange and cooling of the mold. Its significant beneficial effect is that it makes full use of the characteristics of water cooling, which has a large specific heat capacity and high heat exchange efficiency. Compared with air cooling or natural cooling, it can reduce the temperature of the mold after molding to a safe range at a faster speed, thereby significantly shortening the entire molding process cycle and improving production efficiency. In other possible embodiments, the water cooling structure is usually used in conjunction with the V-shaped contact surface at the bottom of the cooling plate to ensure that the cooling efficiency can be evenly covered on each inclined surface of the prism mold. In order to prevent the vacuum adsorption phenomenon caused by rapid cooling, the contact surface of the cooling plate can also be provided with ventilation grooves to ensure that the cooling plate can be smoothly separated from the mold after cooling.

[0020] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, an elastic buffer mechanism 616 is provided between the connecting seat 613 and the cooling plate 614, the elastic buffer mechanism 616 including a stop screw 6161 and a buffer spring 6162.

[0021] In this embodiment, the working principle of the elastic buffer mechanism is to limit the maximum relative displacement between the connecting seat 613 and the cooling plate 614 by using the plug screw 6161, and to provide axial elastic support force between the connecting seat and the cooling plate by using the buffer spring 6162 sleeved on the plug screw, thereby constructing a retractable floating connection structure. Its core beneficial effect is that it gives the rapid cooling device two completely different contact modes to adapt to different process stages: In the first mode, when the first drive cylinder 611 performs a small stroke, after the cooling plate 614 contacts the mold, the cylinder no longer continues to press deeply. At this time, the cooling plate relies only on the gravity of the device itself and the buffer spring. The preload of spring 6162 gently adheres to the surface of the irregular mold. This "soft contact" effectively buffers mechanical impacts and protects the precision prism mold and the glass product that has not yet fully cooled and solidified from rigid pressure damage. In the second mode, when the ultimate cooling speed is required, the first drive cylinder 611 can be set to a larger stroke, so that it continues to press down and compress the buffer spring 6162 until the cylinder's thrust can be directly transmitted to the cooling plate 614, thereby achieving a high-pressure "hard contact" and maximizing the contact tightness and heat transfer efficiency between the cooling plate and the mold. This design provides process engineers with flexible options, taking into account both mold protection and production efficiency.

[0022] Furthermore, as a preferred embodiment of this solution and not a limitation, when the stroke of the first driving cylinder 611 is small, the cooling plate 614 adheres to the mold by its own weight and the pressure of the buffer spring 6162; when the stroke of the first driving cylinder 611 is increased, the cooling plate 614 adheres to the mold by the pressure of the first driving cylinder 611.

[0023] In this embodiment, the working principle of this technical feature is to utilize the adjustable stroke characteristic of the first driving cylinder 611 in conjunction with the elastic buffer mechanism to achieve switching between two different pressure modes: when the cylinder is set to a smaller downward stroke, the cylinder piston rod extends only a limited amount, and the cylinder stops applying pressure after the cooling plate 614 contacts the mold. At this time, the flexible fit with the mold is achieved solely by the weight of the device components themselves and the elastic restoring force of the buffer spring 6162; while when the cylinder is set to a larger stroke, the cylinder continues to drive the connecting seat downward and compress the spring, so that the output thrust of the cylinder is directly transmitted to the cooling plate 614, thereby... Achieving rigid bonding greatly enriches the selectivity of cooling processes. Flexible bonding is suitable for pressure-sensitive stages or stages that need to avoid rigid impacts, effectively preventing damage to precision prism molds or stress cracks in glass products. Rigid bonding, on the other hand, is suitable for stages that require maximizing contact tightness to pursue ultimate cooling efficiency. In practical embodiments, this dual-mode design, combined with the V-shaped bonding surface at the bottom of the cooling plate, is specifically used for processing irregularly shaped molds with pointed tops or bevels in the rapid cooling station of a molding press, solving the technical problem that conventional flat indenters cannot simultaneously protect the mold and provide efficient cooling.

[0024] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the first drive cylinder 611 is a low-friction cylinder with adjustable stroke.

[0025] In this embodiment, the working principle of the first drive cylinder 611, which adopts a low-friction design, is to greatly reduce the dynamic and static friction resistance during piston movement by optimizing the internal sealing components and lubrication structure. This ensures that the cylinder can maintain a smooth, creep-free movement even under low-pressure or low-speed conditions, preventing damage to precision optical molds or glass products caused by the impact force of jerking. Its adjustable stroke characteristic is achieved by precisely controlling the extension length of the piston rod through a position sensor or mechanical limit device. This is a key prerequisite for realizing the aforementioned dual-mode bonding process: by setting different stroke endpoints, it is possible to precisely select whether to allow the cooling plate to lightly touch the mold (a flexible mode utilizing its own weight and spring force) or to continue pressing down to apply the rated thrust (a rigid mode utilizing cylinder force). Its significant beneficial effect is that it combines the smoothness of the movement with the flexibility of the process. It can provide enough driving force to overcome the guiding resistance while maintaining extreme gentleness at the moment of contact with the mold, thereby maximizing the service life of the irregular mold while ensuring the rapid cooling efficiency.

[0026] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the guide assembly 612 includes a first linear bearing 6122 and a second linear bearing 6123 disposed on the upper plate 6121 of the molding machine, and a first optical axis 6124 and a second optical axis 6125 respectively cooperating with the first linear bearing 6122 and the second linear bearing 6123.

[0027] In this embodiment, the guiding assembly works by fixing the first linear bearing 6122 and the second linear bearing 6123 onto the upper plate 6121 of the molding press, while the first optical axis 6124 and the second optical axis 6125 are connected to the movable connecting seat 613 and slide within the bearings, thus constructing a dual-axis guiding structure. Its significant advantage lies in providing extremely high torsional rigidity and linearity of movement through the dual-axis cooperation, strictly constraining the cooling plate 614 to only rise and fall in the vertical direction, ensuring that the V-shaped contact surface at the bottom of the cooling plate can be precisely aligned with the irregular upper surface of the prism mold, avoiding mold damage or uneven cooling caused by downward displacement. In addition, in the preferred embodiment, this structure also facilitates the setting of a sealing ring between the optical axis and the linear bearing, thereby forming a dynamic sealing structure. While ensuring mechanical guiding accuracy, it effectively prevents the leakage of protective gas (such as nitrogen) in the fully sealed hot pressing cavity of the molding press through the guiding gap, maintaining the stability of the gas pressure and environment in the furnace cavity.

[0028] Furthermore, as a preferred embodiment of this solution and not a limitation, the mating surface 6141 of the cooling plate 614 has a symmetrical V-shaped structure to adapt to the upper mold of the mold.

[0029] In this embodiment, the symmetrical V-shaped structure of the bonding surface works on the basis of precise geometric matching. Specifically, the V-shaped groove accommodates the unique ridge-shaped or pointed upper surface (typically with a 90° angle) of the prism mold, transforming the point or line contact between the conventional flat indenter and the irregularly shaped mold into a large-area, fully covered surface contact. Its significant advantage lies in maximizing the heat exchange area between the cooling plate and the irregularly shaped mold, ensuring that the low-temperature efficiency brought by water cooling can be rapidly and evenly transferred to all inclined surfaces of the mold. This not only greatly improves the rapid cooling efficiency but also shortens the cooling time. The molding cycle also effectively avoids mold damage caused by the flat pressure head pressing on the mold tip or glass internal stress cracking caused by uneven local cooling. In other possible embodiments, the included angle of the V-shaped structure is not limited to 90°, but is customized in the range of 45° to 135° according to the specific geometric characteristics of the prism to be processed (such as a total reflection prism or a roof prism). In addition, ventilation grooves are usually opened on the bonding surface to destroy the vacuum adsorption force that may be generated during the cooling process, so as to ensure that the cooling plate can be smoothly and quickly separated from the mold after cooling and prevent adhesion.

[0030] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, a sealing ring 6126 for preventing air leakage from the furnace cavity of the molding machine is provided between the first optical axis 6124 and the first linear bearing 6122 and between the second optical axis 6125 and the second linear bearing 6123.

[0031] In this embodiment, the elastic deformation of the sealing ring is used to fill the mechanical fit gap, thereby constructing a reliable dynamic sealing interface when the optical axis moves up and down. Its significant advantage lies in effectively solving the sealing problem that inevitably exists when the external drive and guide mechanism passes through the molding machine furnace body, ensuring the airtightness of the fully sealed hot pressing molding cavity. This not only prevents the leakage of expensive protective gases (such as nitrogen) from the cavity to reduce operating costs, but also blocks external oxygen-containing air from entering the furnace cavity, thereby strictly maintaining the low-oxygen process environment required to prevent mold oxidation and product defects. In specific embodiments, considering the high-temperature environment of the molding machine, the sealing ring is usually made of high-temperature resistant and wear-resistant fluororubber or silicone material, and can be designed as a multi-seal structure to maintain excellent sealing performance during the frequent reciprocating rapid cooling action of the optical axis.

[0032] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the bonding surface 6141 is provided with a ventilation groove 6143 for preventing the cooling plate 614 from sticking to the upper mold.

[0033] In this embodiment, the working principle of the ventilation groove structure is to use the groove structure opened on the contact surface 6141 of the cooling plate to break the sealed contact surface. At the moment of separation after the cooling plate 614 and the mold are in close contact, air is allowed to quickly enter the contact interface through these grooves, thereby balancing the air pressure inside and outside the contact surface and effectively breaking the vacuum adsorption effect formed by the extrusion of air. Its significant beneficial effect is to solve the vacuum adhesion phenomenon that is easy to occur when smooth or highly compatible metal surfaces are closely bonded. It ensures that the cooling plate can be smoothly and without resistance separated from the upper mold after the rapid cooling process, and prevents the cooling plate from accidentally sucking up the mold, taking it away from the conveying position or causing scratches on the mold surface when it rises due to excessive adsorption force, thereby ensuring the continuity of automated production and the safety of the mold. In other possible embodiments, the specific shape of the ventilation groove 6143 can be designed as a "well" shape, radial shape or parallel stripe shape, and extend to the edge of the cooling plate 614 to ensure that good ventilation and air breaking effect can be maintained in any bonding state.

[0034] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the bonding surface 6141 has a predetermined angle α adapted to the irregular mold, wherein 45°≤α≤135°.

[0035] In this embodiment, the contact surface 6141 of the cooling plate is no longer a single plane, but is designed as a groove structure with a predetermined included angle α, 45°≤α≤135°. This angle α is specially configured to be completely consistent with the protrusion angle of the upper surface of the irregular mold such as the prism to be processed, so that the upper part of the mold can be completely "wrapped" when the cooling plate is pressed down. Its core beneficial effect is to transform the extremely inefficient "line contact" between the traditional planar cooling device and the irregular mold into a highly efficient full-area "surface contact". This not only greatly increases the heat exchange area, so that the cooling energy brought by water cooling can be transferred to the whole mold at the fastest speed, significantly shortening the rapid cooling cycle, but also effectively disperses the mechanical stress when pressing down, avoiding crushing of the mold tip or causing the glass product to break due to excessive local pressure.

[0036] The working principle of this embodiment is as follows: Using the first drive cylinder as a power source, the cooling plate is driven to move vertically up and down along the guide assembly via the connecting seat. During this movement, the sealing ring between the optical shaft and the bearing effectively prevents the leakage of protective gas in the fully sealed cavity of the molding press. When the cooling plate descends and contacts the mold, its specially designed V-shaped contact surface (predetermined angle 45°-135°) can completely enclose the top or upper surface of the pointed or inclined surface of irregular molds such as prisms, thereby achieving a large-area close contact. At the same time, the external cooling water system introduces low-temperature water into the water-cooled flow channel inside the cooling plate through cooling water pipes for circulation, quickly removing heat from the mold. More importantly, with the help of the elastic buffer mechanism composed of plug screws and buffer springs between the connecting seat and the cooling plate, the device realizes a "dual-mode" contact process: that is, by controlling the downward stroke of the cylinder, when the stroke is small, only the weight of the device and the spring force are used to achieve flexible contact to protect the mold; when the stroke is increased, the cylinder thrust is used to compress the spring to achieve rigid contact to improve cooling efficiency. After cooling is completed, the vent groove on the contact surface breaks the vacuum adsorption of the contact surface, ensuring that the device can be smoothly separated and reset.

[0037] The above are implementation methods provided in conjunction with specific content, and it is not intended that the specific implementation of this application is limited to these descriptions. Any methods or structures that are similar to those of this application, or any technical deductions or substitutions made based on the concept of this application, should be considered within the scope of protection of this application.

Claims

1. A rapid cooling device for the upper mold of a molding machine, characterized in that, It includes a first drive cylinder (611), a guide assembly (612) connected to the output end of the first drive cylinder (611), a connecting seat (613) connected to the first drive cylinder (611) through the guide assembly (612), and a cooling plate (614) connected to the connecting seat (613). The first drive cylinder (611) drives the cooling plate (614) to rise and fall through the connecting seat (613). The guide assembly (612) is used to guide the rise and fall of the cooling plate (614). The bottom of the cooling plate (614) is provided with a bonding surface (6141) that fits the upper surface of the irregular mold.

2. The rapid cooling device for the upper mold of the molding machine according to claim 1, characterized in that, It also includes a cooling water pipe (615) connected to the cooling plate (614), and the cooling plate (614) has a water cooling channel (6142) connected to the cooling water pipe (615) inside, so as to cool the mold by water cooling.

3. The rapid cooling device for the upper mold of the molding machine according to claim 1, characterized in that, An elastic buffer mechanism (616) is provided between the connecting seat (613) and the cooling plate (614), the elastic buffer mechanism (616) including a stop screw (6161) and a buffer spring (6162).

4. The rapid cooling device for the upper mold of the molding machine according to claim 3, characterized in that, When the stroke of the first driving cylinder (611) is small, the cooling plate (614) adheres to the mold by its own weight and the pressure of the buffer spring (6162); when the stroke of the first driving cylinder (611) is increased, the cooling plate (614) adheres to the mold by the pressure of the first driving cylinder (611).

5. The rapid cooling device for the upper mold of the molding machine according to claim 1, characterized in that, The first drive cylinder (611) is a low-friction cylinder with adjustable stroke.

6. The rapid cooling device for the upper mold of the molding machine according to claim 1, characterized in that, The guide assembly (612) includes a first linear bearing (6122) and a second linear bearing (6123) disposed on the upper plate (6121) of the molding machine, and a first optical axis (6124) and a second optical axis (6125) respectively cooperating with the first linear bearing (6122) and the second linear bearing (6123).

7. The rapid cooling device for the upper mold of the molding machine according to claim 1, characterized in that, The mating surface (6141) of the cooling plate (614) has a symmetrical V-shaped structure to fit the upper mold of the mold.

8. The rapid cooling device for the upper mold of the molding machine according to claim 6, characterized in that, A sealing ring (6126) for preventing air leakage in the furnace cavity of the molding machine is provided between the first optical axis (6124) and the first linear bearing (6122) and between the second optical axis (6125) and the second linear bearing (6123).

9. The rapid cooling device for the upper mold of the molding machine according to claim 2, characterized in that, The bonding surface (6141) is provided with a ventilation groove (6143) to prevent the cooling plate (614) from sticking to the upper mold.

10. The rapid cooling device for the upper mold of the molding machine according to claim 1, characterized in that, The bonding surface (6141) has a predetermined angle α that is adapted to the irregular mold, wherein 45°≤α≤135°.

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