Hot suction mold for glass forming

Abstract

The utility model relates to glass manufacturing and provides a glass forming heat suction mold which comprises a base, a first boss is formed on the base, a cavity is formed in the first boss, a plurality of air suction holes are formed in the bottom of the cavity and penetrate through the base so that the air suction holes can be connected with a vacuum generator, and glass frit in a hot melting state is placed in the cavity; and then the vacuum generator is started, and air in the cavity is rapidly extracted through the air suction holes, so that tiny marks or recesses left on the surface of glass due to thermal expansion or cooling shrinkage of the air in the forming process are avoided, the quality of glass products is remarkably improved, meanwhile, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The present disclosure relates to glass manufacturing, and particularly to a thermal suction mold for glass forming. Background Art

[0002] Glass injection molding is a molding process that injects molten glass into a precisely designed mold, aiming to produce products with complex shapes, high precision, and stable dimensions. The production process faces significant challenges, especially in reducing costs while pursuing high efficiency and high quality. Existing technologies usually use upper and lower molds to close and pressurize at extremely high temperatures (about 700°C) to form the glass material in a softened state. However, during the high-temperature mold closing process, since the mold directly contacts the softened glass surface, obvious mold marks are often left on the front and back of the glass. The mold marks affect the quality of the product, and it needs to be polished and buffed before it becomes a qualified product. This process not only consumes a large amount of time and resources but also reduces production efficiency. Summary of the Utility Model

[0003] The technical problem to be solved by the present disclosure is to provide a thermal suction mold for glass forming, which can avoid leaving mold marks on the glass surface during the glass forming process, reduce production costs, and improve production efficiency.

[0004] To solve the above technical problem, the present disclosure provides a thermal suction mold for glass forming, including a base. A first boss is formed on the base, and a cavity is provided on the first boss. A plurality of suction holes are provided at the bottom of the cavity, and the suction holes penetrate the base to be connectable to a vacuum generator.

[0005] In some embodiments, a groove is provided on the surface of the base away from the cavity, and the position of the groove corresponds to that of the cavity.

[0006] In some embodiments, an antioxidant protection layer is provided on the bottom surface of the groove.

[0007] In some embodiments, the number of cavities is at least two, the number of grooves is at least two, and the cavities and the grooves are arranged in one-to-one correspondence.

[0008] In some embodiments, the suction holes are evenly arranged at equal intervals at the bottom of the cavity.

[0009] In some embodiments, a plurality of second bosses are formed on the stepped surface of the base, and the second bosses are connected to the outer peripheral side wall of the first boss.

[0010] In some embodiments, the plurality of second bosses are symmetrically arranged with respect to the first boss.

[0011] In some embodiments, a plurality of dust removal holes are provided on the first boss.

[0012] In some embodiments, the bottom of the cavity is formed as a curved surface with both ends in the length direction being higher than the central region.

[0013] In some embodiments, at least one limiting block is formed on the inner side wall of the cavity, and the limiting blocks are symmetrically arranged with respect to the center line in the length direction of the cavity.

[0014] Through the above technical solution, the hot suction mold for glass forming provided by the present disclosure includes a base, a first boss is formed on the base, a cavity is arranged on the first boss, a plurality of suction holes are arranged at the bottom of the cavity, and the suction holes penetrate through the base so as to be able to be connected to a vacuum generator. Place the glass material in a hot melt state in the cavity, and then start the vacuum generator. The air in the cavity is quickly extracted through the suction holes to form a negative pressure environment. This negative pressure effect not only makes the glass fit tightly and evenly against the cavity, but also during the cooling and solidification process, due to the complete discharge of air, it avoids the tiny imprints or depressions left on the glass surface due to the thermal expansion or cooling contraction of air during the forming process, that is, the so-called "mold mark", significantly improving the quality of the glass products, while improving the production efficiency and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 is a schematic structural diagram of the hot suction mold for glass forming disclosed in the embodiments of the present disclosure;

[0017] Figure 2 is Figure 1 a schematic structural diagram from another angle of

[0018] DESCRIPTION OF THE REFERENCE NUMERALS:

[0019] 1. Base; 2. Cavity; 3. First boss; 4. Groove; 5. Second boss; 6. Limiting block; 7. Dust removal hole; 8. Suction hole; 9. Step surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will further describe in detail the embodiments of the present disclosure in conjunction with the drawings and embodiments. The detailed description and drawings of the following embodiments are used to exemplarily illustrate the principle of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms, not limited to the specific embodiments disclosed in the text, but including all technical solutions falling within the scope of the claims.

[0021] These embodiments are provided by the present disclosure to make the present disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the compositions of materials, numerical expressions and numerical values set forth in these embodiments should be construed as merely exemplary, rather than as limitations.

[0022] It should be noted that in the description of the present disclosure, unless otherwise specified, the meaning of "a plurality" is greater than or equal to two; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0023] In addition, the "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. The terms "comprising" or "including" and similar words mean that the elements before this word are covered by the elements listed after this word, and do not exclude the possibility of also covering other elements.

[0024] It should also be noted that in the description of the present disclosure, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. When it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0025] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as those, should be construed to have a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0026] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and devices should be regarded as part of the specification.

[0027] SeeFigure 1 , the present disclosure provides a thermal suction mold for glass forming, including a base 1. A first boss 3 is formed on the base 1, and a cavity 2 is arranged on the first boss 3. A plurality of suction holes 8 are arranged at the bottom of the cavity 2, and the suction holes 8 penetrate through the base 1 to be capable of connecting with a vacuum generator. It should be noted that this mold has no upper mold. During the process of forming glass, first, the molten glass material is placed in the cavity 2, and then the vacuum generator is started. The air in the cavity is quickly extracted through the suction holes 8 to form a negative pressure environment. This negative pressure effect not only makes the glass fit tightly and evenly against the cavity 2, but also during the cooling and solidification process, due to the complete discharge of air, it greatly reduces the tiny imprints or depressions left on the glass surface during the traditional forming process due to the thermal expansion or cooling contraction of air, that is, the so-called "mold mark". In addition, by precisely controlling the cooling rate, it further ensures that the glass shrinks evenly during solidification, avoiding deformation and cracks caused by stress concentration, thus achieving a smooth and flawless surface of the formed glass product. While ensuring efficient forming, this thermal suction mold significantly improves the quality of the glass product, and there will be no mold marks on the glass, providing advanced technical support for high-end glass manufacturing and improving production efficiency at the same time.

[0028] It should be noted that this thermal suction mold can be used not only to form glass, but also to form other products through injection molding. Here, forming glass is taken as an example.

[0029] In some embodiments, referring to Figure 2 , a groove 4 is provided on the surface of the base 1 away from the cavity 2, and the position of the groove 4 corresponds to that of the cavity 2. This groove 4 not only forms a direct communication path with the suction holes 8 below the cavity 2 in terms of spatial layout, but also serves as a docking interface for the vacuum generator in terms of function. In addition, the size and shape of the groove 4 are optimized to adapt to common vacuum tube connectors in the market or to be combined directly with customized vacuum pump connection devices. At the same time, in order to ensure a good sealing effect during the vacuum forming process, an elastic sealing ring is arranged inside the groove 4 or a precision-machined tight-fit structure is adopted to form a sealed connection. This not only helps to prevent air leakage and ensure the effective operation of the vacuum system, but also can be quickly disassembled when necessary for easy cleaning and maintenance of the mold. The position layout of the groove 4 makes it convenient for operators to use, enabling the access and disconnection of the vacuum tube to be both fast and safe without the need for complex tools or laborious operations.

[0030] In some embodiments, the bottom surface of the groove 4 is provided with an anti-oxidation protective layer. The bottom surface of the mold groove 4 is thoroughly cleaned, and ultrasonic cleaning is used to remove surface grease, impurities and tiny particles, followed by sandblasting to enhance surface roughness, which is beneficial to the adhesion of subsequent coatings. An alloy containing aluminum and chromium elements is selected as the material for the anti-oxidation protective layer. This alloy coating can form a dense oxide film at high temperature, effectively blocking oxygen penetration, and at the same time has good mechanical properties and thermal stability, thereby improving the service life of the mold.

[0031] In some embodiments, the number of cavities 2 is at least two, the number of grooves 4 is at least two, and the cavities 2 and the grooves 4 are arranged in a one-to-one correspondence. The first boss 3 is provided with at least two cavities 2, which can be completely the same cavities 2 to manufacture multiple identical products at the same time, or they can be designed to be different cavities 2, for example: one produces curved glass and the other produces flat glass, to meet the diverse product needs, significantly improving the output of a single injection molding, thereby reducing the manufacturing time and cost of a unit product.

[0032] In some embodiments, the air suction holes 8 are evenly arranged at equal intervals at the bottom of the cavity 2. The equal distances between adjacent air suction holes 8 can balance the pressure distribution inside the cavity 2, avoid product defects such as bubbles, depressions or deformations caused by gas accumulation in local areas, and improve the quality of the glass. The air suction holes 8 are not only equidistant, but also evenly distributed throughout the bottom of the cavity 2. The exhaust capacity of the cavity 2 is balanced, which helps to reduce the internal stress concentration caused by uneven exhaust. The geometry of the glass and product characteristics are considered when designing the cavity 2. The diameter and depth of the air suction holes 8, as well as the distance between the air suction holes 8 close to the side wall of the cavity 2 and the wall of the cavity 2 are set to achieve the best exhaust effect, which can reduce the supplementary injection or additional cooling time caused by poor exhaust, thereby shortening the molding cycle, improving production efficiency, and improving the quality of the glass appearance.

[0033] In some embodiments, a plurality of second bosses 5 are formed on the stepped surface 9 of the base 1, and the second bosses 5 are connected to the peripheral side wall of the first boss 3. The provision of the second bosses 5 increases the contact area and connection strength between the mold base 1 and the surrounding structure of the cavity 2, prevents the cavity 2 from deforming, ensures the stability of the cavity 2, and maintains the accuracy of the size of the cavity 2 even when subjected to physical stress caused by thermal expansion and cold contraction, thereby improving the dimensional accuracy and surface quality of the glass, reducing the generation of defective products, and optimizing production costs and efficiency.

[0034] In some embodiments, the plurality of second bosses 5 are symmetrically arranged with respect to the first boss 3. The symmetrical arrangement ensures that the first boss 3 is evenly supported by the second bosses 5 in all directions. During the glass forming process, the cavity 2 is subjected to pressures from all directions. The layout of the symmetrical second bosses 2 can effectively counteract the force on the first boss 3, avoiding local overload or deformation of the cavity 2 due to uneven force, which is beneficial to protecting the structure of the cavity 2.

[0035] In some embodiments, a plurality of dust removal holes 7 are provided on the first boss 3. The quality of the glass product depends on its transparency and surface flawlessness. If dust accumulates on the base 1 when the cavity 2 is forming glass, and the dust falls into the raw material in the cavity 2 during the forming process, it will cause spots, stripes or bubbles in the glass. The arrangement of connecting the dust removal holes 7 to the air extraction pump can effectively reduce dust, ensure the transparency and surface flatness of the glass, and improve the quality of the product.

[0036] In some embodiments, the bottom of the cavity 2 is formed as a curved surface with both ends in the length direction higher than the central region. The two ends refer to the positions of the cavity 2 close to the side walls of the cavity 2. Through the curved surface design with both ends high and the middle low, when the molten glass material is injected into the cavity 2, the glass will conform to the shape of the cavity 2 to form a smooth and continuous curved surface. By adjusting the height of the two ends or the specific shape of the curved surface, glass with different curvatures and different sizes can be formed to meet the diverse and customized needs of the market. Directly forming the required curved glass in the cavity 2 can greatly reduce subsequent secondary processing steps such as grinding and polishing, saving costs and improving production efficiency.

[0037] In some embodiments, at least one limiting block 6 is formed on the inner side wall of the cavity 2, and the limiting block 6 is symmetrically arranged with respect to the center line in the length direction of the cavity 2. When the cavity 2 is forming large-size or thin curved glass, the glass material is prone to bending deformation, that is, the "sucking bend" phenomenon, due to its own weight or thermal stress. The limiting block 6 provides necessary support during the forming process by contacting the glass, preventing the glass sheet from sagging or shifting excessively in the heated and softened state, and ensuring that the final shape of the glass is consistent with the preset shape.

[0038] To better understand the technical solutions of the present disclosure, the following is described in combination with relatively preferred technical features.

[0039] See Figure 1 and Figure 2, the present disclosure provides a hot suction mold for glass forming, including a base 1, on which a first boss 3 is formed. A cavity 2 is provided on the first boss 3. A plurality of suction holes 8 are provided at the bottom of the cavity 2, and the suction holes 8 penetrate through the base 1 to be connectable to a vacuum generator. A groove 4 is provided on the surface of the base 1 away from the cavity 2, and the position of the groove 4 corresponds to that of the cavity 2. The number of cavities 2 is at least two, and the number of grooves 4 is two, and the cavities 2 and the grooves 4 are arranged in one-to-one correspondence. An antioxidant protective layer is provided on the bottom surface of the groove 4, and the suction holes 8 are evenly arranged at equal intervals at the bottom of the cavity 2. A plurality of second bosses 5 are formed on the stepped surface 9 of the base 1, and the second bosses 5 are connected to the outer peripheral side wall of the first boss 3. The plurality of second bosses 5 are symmetrically arranged with respect to the first boss 3. A plurality of dust removal holes 7 are provided on the first boss 3. The bottom of the cavity 2 is formed into a curved surface with both ends in the length direction higher than the central region. At least one limiting block 6 is formed on the inner side wall of the cavity 2, and the limiting block 6 is symmetrically arranged with respect to the center line in the length direction of the cavity 2.

[0040] In summary, the disclosed hot suction mold for glass forming has the following advantages: The glass forming process starts with placing the glass material preheated to the softening point into the cavity 2. With the activation of the generator, the equally spaced suction holes 8 at the bottom of the base 1 quickly extract the air in the cavity 2, forming a strong negative pressure, ensuring that the glass material can uniformly and quickly fill the cavity 2, effectively avoiding the generation of bubbles. At the same time, the antioxidant protective layer in the groove 4 protects the groove 4 from high temperature and glass melt erosion. Thanks to the curved surface design with both ends high and the middle low of the cavity 2 and the symmetrically arranged limiting blocks 6, the formed glass products have precise dimensional control and excellent surface finish, and do not require other processes such as grinding and polishing. The symmetric layout of the second boss 5 and the first boss 3 enhances the structural stability of the cavity 2, and the setting of the dust removal holes 7 helps to keep the cavity 2 clean, further improving the finished product quality, significantly improving the efficiency and precision of glass forming, while reducing energy consumption and waste rate.

[0041] So far, the embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed here based on the above description.

[0042] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be equivalently replaced without departing from the scope and spirit of the present disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way.

Claims

1. A hot suction mold for glass forming, characterized in that, Comprising: A base (1) on which a first boss (3) is formed; A cavity (2) is provided on the first boss (3), and a plurality of suction holes (8) are provided at the bottom of the cavity (2), and the suction holes (8) penetrate through the base (1) to be connectable to a vacuum generator; A plurality of dust removal holes (7) are provided on the first boss (3), and the dust removal holes (7) can be connected to an air extraction pump.

2. The hot suction mold for glass forming according to claim 1, characterized in that, A groove (4) is provided on the surface of the base (1) away from the cavity (2), and the groove (4) corresponds to the position of the cavity (2).

3. The hot suction mold for glass forming according to claim 2, characterized in that, An antioxidant protective layer is provided on the bottom surface of the groove (4).

4. The hot suction mold for glass forming according to claim 3, characterized in that, The number of the cavities (2) is at least two, the number of the grooves (4) is at least two, and the cavities (2) and the grooves (4) are arranged in one-to-one correspondence.

5. The hot suction mold for glass forming according to claim 1, characterized in that, The suction holes (8) are evenly arranged at equal intervals at the bottom of the cavity (2).

6. The hot suction mold for glass forming according to claim 1, wherein A plurality of second bosses (5) are formed on the stepped surface (9) of the base (1), and the second bosses (5) are connected to the outer peripheral side wall of the first boss (3).

7. The hot suction mold for glass forming according to claim 6, characterized in that, The plurality of second bosses (5) are symmetrically arranged with respect to the first boss (3).

8. The hot suction mold for glass forming according to any one of claims 1 to 7, characterized in that, The bottom of the cavity (2) is formed into a curved surface with both ends in the length direction higher than the central region.

9. The hot suction mold for glass forming according to any one of claims 1 to 7, characterized in that, At least one limiting block (6) is formed on the inner side wall of the cavity (2), and the limiting block (6) is symmetrically arranged with respect to the center line in the length direction of the cavity (2).

Images