Paper pulp molding device and upper mold heating structure

Abstract

The utility model provides a paper pulp molding device and an upper mold heating structure, which comprises a lower mold assembly and an upper mold assembly, the upper side surface of the lower mold assembly is provided with the upper mold assembly used for mold assembly, and the lower mold assembly comprises a lower mold assembly used for sucking and dehydrating paper pulp. The upper mold assembly comprises an upper mold body used for heating and transferring a wet blank product, a heating piece is installed in the upper mold body, and the heating piece comprises a heat insulation pad used for heat insulation and a heating ring used for heating the wet blank product. In a traditional process, the drying time of a wet blank in a hot-pressing lower die is long, an upper die piece provided with a heating piece can heat and dry the wet blank when the wet blank is transferred to the upper die piece, the time for heating and drying a wet blank product in the subsequent process of closing the hot-pressing lower die and the hot-pressing upper die can be effectively shortened, and therefore the whole production cycle time is shortened, and the production efficiency is improved. The production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of mold equipment, and specifically relates to a pulp molding device and an upper mold heating structure. Background Technology

[0002] Wet pressing of pulp molded products is a critical process in pulp molding production. However, current conventional pulp molding equipment has revealed several problems in actual production. Because the upper mold lacks heating, the wet preform cannot be dried using its temperature while awaiting transfer to the next process. Drying must rely solely on the subsequent hot pressing of the lower and upper molds. This forces the hot pressing stage to handle all the drying, resulting in prolonged drying time for the wet preform, lengthening the overall production cycle, reducing efficiency, and increasing costs.

[0003] Conventional solutions include extending the hot-pressing time or increasing the hot-pressing temperature. However, extending the hot-pressing time lengthens equipment operating cycles, further increases energy consumption, and reduces output per unit time, hindering efficient production. While increasing the hot-pressing temperature can accelerate drying to some extent, it may negatively impact the quality of pulp molded products, causing issues such as localized overheating, deformation, and embrittlement, reducing product yield, increasing scrap costs, and ultimately hindering cost control and efficiency improvement. Therefore, a new structure is needed to address these technical problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a pulp molding device and an upper mold heating structure to solve the problems mentioned in the background art.

[0005] This utility model is achieved through the following technical solution: a pulp molding device and an upper mold heating structure, comprising: a lower mold assembly and an upper mold assembly, wherein an upper mold assembly for mold closing is installed on the upper surface of the lower mold assembly, the lower mold assembly includes a lower mold component for sucking and dewatering the pulp, the upper mold assembly includes an upper mold component for heating and transferring the wet product, and a heating element is installed inside the upper mold component, the heating element including a heat insulation pad for heat insulation and a heating coil for heating the wet product.

[0006] In a preferred embodiment, the lower mold component includes a base plate, a base, and a lower mold base. The base is mounted on the upper surface of the base plate, and the lower mold base is mounted on the upper surface of the base. The length and width of the lower mold base match the length and width of the base.

[0007] In a preferred embodiment, a forming lower mold base is installed at the center of the upper surface of the lower mold base, and a column is installed at each of the four corners of the upper surface of the lower mold base. The upper mold component includes a cover plate and an upper mold base.

[0008] In a preferred embodiment, the four corners of the side surface of the upper mold base away from the cover plate are connected to the top of the column through fixing holes, and a forming upper mold groove is provided at the center of the side surface of the upper mold base away from the cover plate.

[0009] In a preferred embodiment, the structure of the upper forming mold groove is matched with the structure of the lower forming mold base, and a temperature monitoring and control module is installed on the outer surface of the upper mold base.

[0010] In a preferred embodiment, a heat insulation pad is installed at the bottom of the upper molding mold groove to prevent the heating coil from transferring heat to the upper mold base. The heat insulation pad is made of ceramic fiber material.

[0011] In a preferred embodiment, the temperature sensor and the heating element are electrically connected to the temperature monitoring and control module via wires, and a heating coil is installed at the bottom of the upper mold groove through a heat insulation pad.

[0012] In a preferred embodiment, the heating coil includes a resistance heating wire and a protective sleeve. The resistance heating wire is installed inside the protective sleeve. The heating coil has a multi-ring structure. The heating element abuts against the wet product through the upper mold groove.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are as follows: 1. By setting an upper mold component, the upper mold assembly includes an upper mold component for heating and transferring the wet blank product. The upper mold component is equipped with a heating element. In use, the drying time of the wet blank in the hot pressing lower mold is relatively long in the traditional process. However, the upper mold component with the heating element can start heating and drying the wet blank when it is transferred to the upper mold component. This can effectively shorten the time for heating and drying the wet blank product after the hot pressing lower mold and hot pressing upper mold are closed, thereby reducing the overall production cycle time and improving production efficiency.

[0014] 2. By setting up heating components, including heat insulation pads for heat insulation and heating coils for heating the wet blank products, the heat insulation pads can effectively prevent the heat generated by the heating coils from dissipating into the surrounding environment (mainly preventing heat transfer towards the upward mold base), so that the heat is more concentrated on the wet blank products, reducing heat waste, thereby improving heating efficiency, shortening the drying time of the wet blanks, and speeding up the production pace. At the same time, the heating coils can generate heat quickly and evenly, providing a stable heat source for the wet blank products, ensuring that the wet blanks can be heated and dried in a timely and effective manner after being transferred to the lower and upper hot press molds, which helps to improve product quality and production efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of a pulp molding device and an upper mold heating structure according to the present invention.

[0017] Figure 2 This is a schematic diagram of the side structure of a pulp molding device and an upper mold heating structure according to the present invention.

[0018] Figure 3 This is a schematic diagram of the upper mold assembly of a pulp molding device and an upper mold heating structure according to the present invention.

[0019] Figure 4 This is a schematic diagram of the heating element of a pulp molding device and an upper mold heating structure according to the present invention.

[0020] Figure 5 This utility model Figure 4 A magnified schematic diagram of the structure at point A.

[0021] In the diagram, 100 is the base plate, 110 is the base, 120 is the lower mold base, 121 is the lower forming mold base, and 130 is the column.

[0022] 200-Upper mold base, 210-Cover plate, 220-Upper mold base, 221-Forming upper mold groove, 230-Fixing hole, 240-Heating element, 241-Heat insulation pad, 242-Heating ring, 243-Protective sleeve, 244-Resistance heating wire. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1 to 5This utility model provides a technical solution: a pulp molding device and an upper mold heating structure, including: a lower mold assembly and an upper mold assembly 200. The upper mold assembly 200 for mold closing is installed on the upper surface of the lower mold assembly. The lower mold assembly includes a lower mold part for sucking and dewatering the pulp. The upper mold assembly 200 includes an upper mold part for heating and transferring the wet product. A heating element 240 is installed inside the upper mold part. The heating element 240 includes a heat insulation pad 241 for heat insulation and a heating coil 242 for heating the wet product.

[0025] Please see Figures 1 to 5 As the first embodiment of this utility model: the lower mold includes a base plate 100, a base 110 and a lower mold base 120. The base 110 is installed on the upper surface of the base plate 100, and the lower mold base 120 is installed on the upper surface of the base 110. The length and width of the lower mold base 120 match the length and width of the base 110.

[0026] A forming lower mold base 121 is installed at the center of the upper surface of the lower mold base 120, and a column 130 is installed at each of the four corners of the upper surface of the lower mold base 120. The upper mold component includes a cover plate 210 and an upper mold base 220.

[0027] The four corners of the upper mold base 220 on the side surface away from the cover plate 210 are connected to the top of the column 130 through fixing holes 230. A forming upper mold groove 221 is provided at the center of the side surface of the upper mold base 220 away from the cover plate 210.

[0028] The structure of the upper forming mold groove 221 is matched with the structure of the lower forming mold base 121. A temperature monitoring and control module 250 is installed on the outer surface of the upper mold base 220. (In actual use, the structure of the upper forming mold groove 221 and the structure of the lower forming mold base 121 can be designed according to the actual required shape, without being limited to a specific shape. After changing the shape, the heating element can be filled with the changed upper forming mold groove 221.)

[0029] The wet pressing process for pulp molded products is as follows: First, the lower mold sucks up the pulp; second, the lower mold dehydrates; third, the upper and lower molds are closed and transferred; fourth, the wet preform is transferred to the upper mold; fifth, the upper mold and the lower hot-pressing mold are closed and transferred; sixth, the wet preform is transferred to the lower hot-pressing mold; seventh, the lower and upper hot-pressing molds are closed and heated to dry the wet preform; eighth, the product is transferred to the next process, and the cycle repeats from step one. (The above is the basic process flow of the wet pressing process for pulp molded products; specific operational details are existing technology and will not be elaborated here.) When the process moves from step four to step five, the wet preform waits inside the upper mold groove 221. At this time, the heating element 240 inside the upper mold groove 221 will dry and heat the wet blank product (the heating time and heating temperature of the heating element 240 can be controlled by a temperature sensor and a temperature monitoring and control module 250; the specific control principle and steps are not described here). When the wet blank product is heated by the heating element 240, its own moisture is reduced, the heating time of the seventh step is reduced, and efficiency is increased. Since the drying time of the wet blank in the hot pressing mold is relatively long in the traditional process, the upper mold with the heating element 240 can start to heat and dry the wet blank when it is transferred to the upper mold, which can effectively shorten the time of heating and drying the wet blank product after the hot pressing mold and the hot pressing upper mold are closed, thereby reducing the overall production cycle time and improving production efficiency.

[0030] Please see Figures 1 to 5 As a second embodiment of this utility model: a heat insulation pad 241 is installed at the bottom of the upper molding groove 221 to prevent the heating coil 242 from transferring heat to the upper mold base 220. The heat insulation pad 241 is made of ceramic fiber material. A temperature sensor is installed at the center of the bottom of the upper molding groove 221. The temperature sensor is a PT100 platinum resistance temperature sensor.

[0031] The temperature sensor and heating element 240 are electrically connected to the temperature monitoring and control module 250 via wires. A heating coil 242 is installed at the bottom of the upper mold groove 221 through a heat insulation pad 241.

[0032] Heating coil 242 includes resistance heating wire 244 and protective sleeve 243. Resistance heating wire 244 is installed inside the protective sleeve 243. Heating coil 242 has a multi-ring structure. Heating element 240 abuts against wet blank product through forming upper mold groove 221.

[0033] When operating the product according to the steps of the first embodiment, the annular resistance heating wire 244 inside the heating coil 242 will uniformly heat the wet product. During the uniform heating of the wet product, a heat insulation pad 241 is provided at its bottom. The heat insulation pad 241 will prevent the heating coil 242 from transferring heat upward, thereby reducing heat loss and allowing for better heating of the wet product. Since the heat insulation pad 241 can effectively prevent the heat generated by the heating coil 242 from dissipating to the surrounding environment (mainly preventing heat from being transferred upward towards the mold base 220), the heat is more concentrated on the wet product, reducing heat waste, thereby improving heating efficiency, shortening the drying time of the wet product, and accelerating the production pace. At the same time, the heating coil 242 can generate heat quickly and uniformly, providing a stable heat source for the wet product, ensuring that the wet product can be heated and dried in a timely and effective manner after being transferred to the lower and upper hot press molds, which helps to improve product quality and production efficiency.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pulp molding apparatus and an upper mold heating structure, comprising: The lower die assembly and the upper die assembly (200) are characterized in that an upper die assembly (200) for closing the die is installed on the upper surface of the lower die assembly, the lower die assembly includes a lower die part for sucking and dewatering the pulp, the upper die assembly (200) includes an upper die part for heating and transferring the wet product, and a heating element (240) is installed inside the upper die part, the heating element (240) includes a heat insulation pad (241) for heat insulation and a heating coil (242) for heating the wet product.

2. The pulp molding device and upper mold heating structure as described in claim 1, characterized in that: The lower mold includes a base plate (100), a base (110), and a lower mold base (120). The base (110) is mounted on the upper surface of the base plate (100), and the lower mold base (120) is mounted on the upper surface of the base (110). The length and width of the lower mold base (120) match the length and width of the base (110).

3. The pulp molding device and upper mold heating structure as described in claim 2, characterized in that: A forming lower mold base (121) is installed at the center of the upper surface of the lower mold base (120), and a column (130) is installed at each of the four corners of the upper surface of the lower mold base (120). The upper mold component includes a cover plate (210) and an upper mold base (220).

4. The pulp molding device and upper mold heating structure as described in claim 3, characterized in that: The upper mold base (220) is connected to the top of the column (130) through fixing holes (230) at the four corners of the side surface away from the cover plate (210). A forming upper mold groove (221) is provided at the center of the side surface away from the cover plate (210).

5. The pulp molding device and upper mold heating structure as described in claim 4, characterized in that: The structure of the upper mold groove (221) is matched with the structure of the lower mold base (121), and a temperature monitoring and control module (250) is installed on the outer surface of the upper mold base (220).

6. The pulp molding device and upper mold heating structure as described in claim 5, characterized in that: A heat insulation pad (241) is installed at the bottom inside the upper mold groove (221) to prevent the heating coil (242) from transferring heat to the upper mold base (220). The heat insulation pad (241) is made of ceramic fiber material. A temperature sensor is installed at the center of the bottom inside the upper mold groove (221). The temperature sensor is a PT100 platinum resistance temperature sensor.

7. The pulp molding device and upper mold heating structure as described in claim 6, characterized in that: The temperature sensor and the heating element (240) are electrically connected to the temperature monitoring and control module (250) via wires, and a heating coil (242) is installed at the bottom of the upper molding groove (221) through a heat insulation pad (241).

8. The pulp molding device and upper mold heating structure as described in claim 7, characterized in that: The heating coil (242) includes a resistance heating wire (244) and a protective sleeve (243). The resistance heating wire (244) is installed inside the protective sleeve (243). The heating coil (242) has a multi-ring structure. The heating element (240) abuts against the wet product through the upper mold groove (221).

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