Starch utensil mold

Abstract

The utility model relates to tableware production mould technical field discloses a kind of starch tableware mould, including outer mould and inner mould, outer mould and inner mould are made of breathable steel, outer mould is sleeved on inner mould, and the inner cavity surface of outer mould and the outer surface of inner mould are formed between interval defined space, starch material for making tableware is filled in defined space, the utility model provides a kind of starch tableware mould, outer mould and inner mould are made of breathable steel, the water vapor produced in the high-temperature high-pressure forming process of breathable steel's breathable performance can be made starch material pass through mould and discharge quickly, avoid forming high-pressure air cavity and gas trapping phenomenon in mould inside;Defined space is formed by outer mould sleeveing inner mould, so that starch material filling position and range are fixed, guarantee the even distribution of pressure in forming process, to solve the problem of uneven tableware wall thickness caused by water vapor cannot be discharged in time smoothly, improve tableware structural strength and service performance.

Description

Technical Field

[0001] This utility model relates to the field of tableware production mold technology, specifically to a starch tableware mold. Background Technology

[0002] Currently, environmentally friendly tableware is divided into biodegradable plastic tableware and fully biodegradable tableware. Starch tableware is a type of biodegradable tableware, which is made from corn starch as the main raw material and processed by high-tech production technology. It contains no harmful substances when used and can be quickly and fully degraded under natural conditions after use, avoiding pollution to the environment and saving non-renewable resources such as petroleum. It is an ideal alternative to the plastic lunch boxes commonly used in the catering market.

[0003] The molding principle of starch tableware mainly involves the fermentation and expansion of starch into food containers under high temperature and pressure in a mold. Specifically, the molding mold for starch tableware generally includes an outer mold, an inner mold, and a heating device. The heating device, located inside the mold, causes the starch mass placed in the mold cavity to expand rapidly under high temperature. However, because the starch mass itself contains moisture, a large amount of water vapor is generated after high-temperature heating. This water vapor needs to be quickly released. If the water vapor cannot be released in time, a high-pressure air cavity will form inside the mold, resulting in uneven pressure distribution. This not only causes defects such as bubbles and dents on the surface of the molded tableware, reducing the product's appearance quality, but also causes uneven wall thickness, affecting its structural strength and performance.

[0004] Currently, starch tableware molds are mainly made of aluminum alloy. The molding parts are typically disassembled into multiple pieces for assembly, with venting channels between each piece for steam release. While aluminum alloy has good thermal conductivity, allowing it to quickly transfer heat to the starch mass and accelerate its expansion and molding, its low density and relatively loose texture mean that even with venting channels, the large spacing between them prevents steam from escaping smoothly, hindering rapid steam release. Secondly, from the perspective of mold assembly structure, while the multi-piece assembly method facilitates mold manufacturing and maintenance, it's difficult to achieve a perfectly tight fit between the pieces. Under high temperature and pressure molding conditions, the aluminum alloy expands, further deforming the gaps and causing some venting channels to be squeezed, deformed, or even blocked, narrowing or interrupting the steam release channels. Simultaneously, the complex channels formed by the multi-piece assembly increase the flow resistance of steam, prolonging its residence time inside the mold and preventing timely release, ultimately leading to trapped steam and affecting product quality. Utility Model Content

[0005] In view of this, the present invention provides a starch tableware mold to solve the problem that uneven tableware wall thickness is caused by the inability of water vapor to be discharged smoothly and in a timely manner during the production process, which affects the structural strength and performance of the tableware.

[0006] This utility model provides a starch tableware mold, comprising:

[0007] The outer mold and the inner mold are both made of breathable steel. The outer mold is fitted onto the inner mold, and a defined space is formed between the inner cavity surface of the outer mold and the outer surface of the inner mold. The defined space is suitable for filling with starch material for making tableware.

[0008] Optionally, the thickness of the outer mold is 3 to 5 mm, and the outer mold has ventilation holes with a diameter of 0.03 to 0.05 mm.

[0009] Optionally, the thickness of the inner mold is 3 to 5 mm, and the inner mold has ventilation holes with a diameter of 0.03 to 0.05 mm.

[0010] Optionally, it also includes an exhaust assembly, the exhaust assembly comprising:

[0011] The first venting component is disposed on the outer surface of the outer mold, and the surface of the first venting component near the outer mold is recessed to form a first venting channel.

[0012] The second venting component is disposed in the inner cavity surface of the inner mold, and the surface of the second venting component near the inner mold is recessed to form a second venting channel.

[0013] Optionally, the first exhaust channel includes multiple interconnected first transverse channels and first longitudinal channels to form a grid-like exhaust structure. The first transverse channels extend circumferentially along the outer mold, and the first longitudinal channels extend axially along the outer mold.

[0014] Optionally, the second exhaust channel includes multiple interconnected second transverse channels and second longitudinal channels to form a mesh-like exhaust structure. The second transverse channels extend circumferentially along the inner mold, and the second longitudinal channels extend axially along the inner mold.

[0015] Optionally, the first longitudinal channel and the second longitudinal channel are arranged parallel to each other and staggered.

[0016] Optionally, it also includes a heating assembly, the heating assembly comprising:

[0017] A first heating element is disposed on the outer surface of the first exhaust element;

[0018] The second heating element is disposed on the inner cavity surface of the second exhaust element.

[0019] Optionally, the first heating element is a spiral first heating element, disposed on the outer surface of the first exhaust element.

[0020] Optionally, the second heating element is a spiral second heating element, which is disposed on the inner cavity surface of the second exhaust element.

[0021] Beneficial effects

[0022] The starch tableware mold provided by this utility model includes an outer mold and an inner mold. Both the outer mold and the inner mold are made of breathable steel. The outer mold is fitted onto the inner mold, and a defined space is formed between the inner cavity surface of the outer mold and the outer surface of the inner mold. The defined space is suitable for filling with starch material for making tableware.

[0023] The starch tableware mold provided by this utility model has an outer mold and an inner mold made of breathable steel. The breathability of the steel allows the water vapor generated by the starch material during the high-temperature and high-pressure molding process to be quickly discharged through the mold, avoiding the formation of high-pressure air cavities and trapped air inside the mold. The limited space formed by the outer mold and the inner mold fixes the filling position and range of the starch material, ensuring uniform pressure distribution during the molding process. This solves the problem of uneven tableware wall thickness caused by the inability of water vapor to be discharged in a timely and smooth manner, and improves the structural strength and performance of the tableware. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a starch tableware mold according to an embodiment of the present utility model;

[0026] Figure 2 This is a cross-sectional schematic diagram of a starch tableware mold according to an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the assembly structure of the outer mold and the inner mold according to an embodiment of the utility model;

[0028] Figure 4 for Figure 3 A cross-sectional schematic diagram of the outer and inner molds;

[0029] Figure 5 This is a schematic diagram of the structure of the first exhaust component according to an embodiment of the present utility model;

[0030] Figure 6This is a cross-sectional schematic diagram of the first exhaust component according to an embodiment of the present utility model;

[0031] Figure 7 This is a schematic diagram of the structure of the second exhaust component according to an embodiment of the present utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Outer mold; 2. Inner mold; 3. First venting component; 31. First venting channel; 4. Second venting component; 41. Second venting channel; 51. First heating component; 52. Second heating component; 6. Mold frame. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] The following is combined Figures 1 to 7 The following describes embodiments of the present invention.

[0036] According to an embodiment of the present invention, a starch tableware mold is provided, comprising:

[0037] Outer mold 1 and inner mold 2 are both made of breathable steel. Outer mold 1 is fitted onto inner mold 2, and a defined space is formed between the inner cavity surface of outer mold 1 and the outer surface of inner mold 2. The defined space is suitable for filling with starch material for making tableware.

[0038] It should be noted that a mold frame 6 is provided on the outside of this starch tableware mold, which is used to enhance the overall structural stability of the mold.

[0039] It should be noted that in this embodiment, both the inner mold 2 and the outer mold 1 are printed with stainless steel powder to create breathable steel, so as to replace local linear gaps for ventilation and achieve rapid ventilation.

[0040] The starch tableware mold provided in this embodiment is made of breathable steel for the outer mold 1 and the inner mold 2. The breathability of the breathable steel allows the water vapor generated by the starch material during the high temperature and high pressure molding process to be quickly discharged through the mold, avoiding the formation of high pressure air chambers and trapped air inside the mold. The limited space formed by the outer mold 1 and the inner mold 2 fixes the filling position and range of the starch material, ensuring uniform pressure distribution during the molding process. This solves the problem of uneven tableware wall thickness caused by the inability of water vapor to be discharged in a timely and smooth manner, and improves the structural strength and performance of the tableware.

[0041] Furthermore, the outer mold 1 has a thickness of 3 to 5 mm, and ventilation holes with a diameter of 0.03 to 0.05 mm are formed on the outer mold 1.

[0042] Furthermore, the inner mold 2 has a thickness of 3 to 5 mm, and ventilation holes with a diameter of 0.03 to 0.05 mm are formed on the inner mold 2.

[0043] It is easy to understand that the thickness of the outer mold 1 and the inner mold 2 is set to 3-5mm. This ensures the structural strength and rigidity of the mold while avoiding problems such as reduced heat conduction efficiency and prolonged molding cycle due to excessive thickness, and mold deformation and shortened service life due to excessive thinness. The diameter of the vent hole is 0.03-0.05mm. This size can ensure that water vapor can be discharged quickly at a suitable flow rate, and avoid starch material leakage into the venting channel due to excessively large hole diameter, which would affect the venting and exhaust effect of the mold. It can also prevent the exhaust resistance from increasing due to excessively small hole diameter, thereby ensuring uniform pressure distribution inside the mold and improving the molding quality and production stability of starch tableware.

[0044] Furthermore, it also includes an exhaust assembly, which includes:

[0045] The first venting component 3 is disposed on the outer surface of the outer mold 1, and the surface of the first venting component 3 near the outer mold 1 is recessed to form a first venting channel 31.

[0046] The second venting component 4 is disposed in the inner cavity surface of the inner mold 2, and the surface of the second venting component 4 near the inner mold 2 is recessed to form a second venting channel 41.

[0047] It should be noted that in this embodiment, both the first venting component 3 and the second venting component 4 are made of aluminum alloy. The excellent thermal conductivity of aluminum alloy accelerates heat transfer, promoting rapid expansion and molding of the starch material. Aluminum alloy also has excellent machinability, enabling the fabrication of complex mesh-like venting channel structures at a lower cost and with higher precision. In an optional embodiment, titanium alloy can also be used to make the first venting component 3 and the second venting component 4, as it possesses higher strength and corrosion resistance, making it suitable for production scenarios with extremely high requirements for mold life and product quality. Alternatively, copper alloy can be used, as its excellent thermal conductivity further enhances heat transfer efficiency and optimizes the molding effect of the starch material.

[0048] In a straightforward manner, the first venting component 3 of the venting assembly is positioned on the outer surface of the outer mold 1, forming a first venting channel 31 near the outer mold 1. The second venting component 4 is positioned on the inner cavity surface of the inner mold 2, forming a second venting channel 41 near the inner mold 2. Together, they create a dual-track parallel venting path. This allows water vapor generated inside the mold to be quickly discharged through two independent yet complementary channels, effectively dispersing the venting pressure and improving venting efficiency compared to a single venting method. The dual venting channels form a three-dimensional venting network, preventing water vapor from accumulating locally, promoting a more uniform pressure distribution inside the mold, reducing differences in tableware wall thickness caused by uneven pressure, lowering the probability of defects such as bubbles and dents on the product surface, and improving the molding quality and production stability of starch tableware.

[0049] It should be noted that the first exhaust channel 31 and the second exhaust channel 41 are connected by an air pipe, through which the water vapor generated during production is discharged to a collection device outside the mold. This not only prevents water vapor from condensing into water droplets around the mold and affecting the production environment, and prevents water droplets from flowing back into the mold and causing a sudden drop in local temperature, thus ensuring the stability of the mold's operating temperature, but also reduces the potential impact of direct water vapor emissions on workshop equipment and operators, improving the safety and environmental friendliness of the production process.

[0050] Furthermore, the first exhaust channel 31 includes multiple interconnected first transverse channels and first longitudinal channels to form a grid-like exhaust structure. The first transverse channels extend circumferentially along the outer mold 1, and the first longitudinal channels extend axially along the outer mold 1.

[0051] Furthermore, the second exhaust channel 41 includes multiple interconnected second transverse channels and second longitudinal channels, forming a grid-like exhaust structure. The second transverse channels extend circumferentially along the inner mold 2, and the second longitudinal channels extend axially along the inner mold 2.

[0052] As easily understood, the first exhaust channel 31 and the second exhaust channel 41 respectively adopt a mesh-like exhaust structure composed of interconnected transverse and longitudinal channels, which can form an all-round, dead-angle-free exhaust network in the circumferential and axial directions of the mold. This breaks the limitations of traditional linear exhaust, allowing water vapor to be quickly discharged through the nearest channel regardless of where it is generated in the mold, improving the uniformity and efficiency of exhaust. At the same time, the mesh-like layout effectively disperses the pressure of water vapor flow, avoiding blockage of local channels due to excessive pressure, ensuring that the internal pressure of the mold remains stable. This reduces problems such as uneven wall thickness and surface defects in tableware caused by poor exhaust, improves the molding accuracy and yield of starch tableware, and ensures the efficient and stable operation of the production process.

[0053] In an alternative embodiment, the first exhaust channel 31 and the second exhaust channel 41 can be replaced with a spiral or wave-shaped structure. By extending the channel length and changing the airflow direction, the contact area between water vapor and the mold wall is increased, promoting the rapid diffusion and discharge of water vapor.

[0054] Furthermore, the first longitudinal channel and the second longitudinal channel are arranged parallel to each other and staggered.

[0055] As is easily understood, the first and second longitudinal channels are arranged parallel to each other and staggered to form a three-dimensional exhaust network. This structure makes the exhaust path of water vapor in the mold more diversified. Water vapor generated in different areas can be quickly dispersed and discharged through multiple staggered channels, avoiding local blockage or poor exhaust caused by concentration in a certain channel.

[0056] Furthermore, it also includes a heating component, which includes:

[0057] The first heating element 51 is disposed on the outer surface of the first exhaust element 3;

[0058] The second heating element 52 is disposed on the inner cavity surface of the second exhaust element 4.

[0059] Specifically, the first heating element 51 is attached to the outer surface of the first exhaust element 3, and the second heating element 52 is attached to the inner cavity surface of the second exhaust element 4. The temperature of the two heating elements is controlled by an external power supply or temperature control system to ensure stable heat output during the molding process of starch tableware. The first heating element 51 heats from the outside of the first exhaust element 3, and the second heating element 52 heats from the inside of the second exhaust element 4, forming a two-way three-dimensional heating mode. This allows the starch material in the mold to be heated evenly and comprehensively, quickly reaching the temperature conditions for fermentation and expansion, shortening the molding time and improving production efficiency. At the same time, uniform heating avoids poor molding due to local overheating or undercooling of the starch material, ensuring consistent wall thickness and a smooth surface for the tableware, effectively improving product quality and pass rate.

[0060] Furthermore, the first heating element 51 is a spiral first heating element, which is disposed on the outer surface of the first exhaust element 3.

[0061] Furthermore, the second heating element 52 is a spiral second heating element, which is disposed on the inner cavity surface of the second exhaust element 4.

[0062] In a straightforward manner, the first heating element 51 and the second heating element 52 are respectively arranged in a spiral structure on the outer surface of the first exhaust element 3 and the inner cavity surface of the second exhaust element 4. The spiral design increases the contact area between the heating components and the mold, allowing heat to be transferred evenly and continuously into the mold along the spiral path, avoiding localized heat accumulation or dead zones in heat transfer. Through this spiral heating layout, the starch material is heated more evenly and fully within the mold, accelerating its fermentation and expansion process, shortening the molding cycle, and improving production efficiency. At the same time, the uniform and stable heating process effectively reduces problems such as tableware deformation and uneven wall thickness caused by temperature differences, improving the molding quality and precision of starch tableware, reducing the defect rate, and ensuring production efficiency.

[0063] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A starch utensil mold characterized by, include: The outer mold (1) and the inner mold (2) are both made of breathable steel. The outer mold (1) is fitted onto the inner mold (2), and a defined space is formed between the inner cavity surface of the outer mold (1) and the outer surface of the inner mold (2). The defined space is suitable for filling with starch material for making tableware.

2. The starch tableware mold according to claim 1, characterized in that, The outer mold (1) has a thickness of 3 to 5 mm, and the outer mold (1) has ventilation holes with a diameter of 0.03 to 0.05 mm.

3. A starch utensil mould according to claim 1 or 2, characterised in that The inner mold (2) has a thickness of 3 to 5 mm, and the inner mold (2) has ventilation holes with a diameter of 0.03 to 0.05 mm.

4. The starch tableware mold according to claim 1, characterized in that, It also includes an exhaust assembly, which comprises: The first venting component (3) is disposed on the outer surface of the outer mold (1), and the surface of the first venting component (3) near the outer mold (1) is recessed to form a first venting channel (31); The second venting component (4) is disposed in the inner cavity surface of the inner mold (2), and the surface of the second venting component (4) near the inner mold (2) is recessed to form a second venting channel (41).

5. The starch tableware mold according to claim 4, characterized in that, The first exhaust channel (31) includes multiple interconnected first transverse channels and first longitudinal channels to form a grid-like exhaust structure. The first transverse channel extends circumferentially along the outer mold (1), and the first longitudinal channel extends axially along the outer mold (1).

6. The starch tableware mold according to claim 5, characterized in that, The second exhaust channel (41) includes multiple interconnected second transverse channels and second longitudinal channels to form a grid-like exhaust structure. The second transverse channel extends circumferentially along the inner mold (2), and the second longitudinal channel extends axially along the inner mold (2).

7. The starch tableware mold according to claim 6, characterized in that, The first longitudinal channel and the second longitudinal channel are parallel to each other and staggered.

8. The starch tableware mold according to claim 4, characterized in that, It also includes a heating component, which comprises: The first heating element (51) is disposed on the outer surface of the first exhaust element (3); The second heating element (52) is disposed on the inner cavity surface of the second exhaust element (4).

9. The starch tableware mold according to claim 8, characterized in that, The first heating element (51) is a spiral first heating element, which is disposed on the outer surface of the first exhaust element (3).

10. The starch tableware mold according to claim 8, characterized in that, The second heating element (52) is a spiral second heating element, which is disposed on the inner cavity surface of the second exhaust element (4).

Images