A drying device for tableware production based on pulp molding
By using an L-shaped pad unit and drive unit control in the pulp molding tableware drying equipment, the problems of uneven drying and deformation were solved, achieving uniform heating and stable drying of tableware and reducing the defect rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN XINFUDA MOLD IND CO LTD
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-03
AI Technical Summary
In existing pulp molding tableware drying equipment, the drying efficiency at the contact point between the bottom of the product and the conveyor belt is low and the product is prone to deformation, resulting in a high defect rate. Existing technologies are unable to achieve uniform heating and prevent deformation.
A drying device including a microwave heating chamber and a conveyor shaft was designed. An L-shaped pad unit is set on the outside of the conveyor shaft to support the bottom of the tableware. The pad unit consists of a first to a fourth pad, with differentiated size and height design to stabilize the position of the tableware. Combined with a rubber through-groove structure and drive unit control, uniform heating is ensured and deformation is prevented.
It achieves uniform drying of the bottom and top of the tableware, reduces the rate of deformation and defects, has a simple structure and low cost, and is suitable for industrial applications.
Smart Images
Figure CN224455300U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pulp raw material processing, specifically a drying device for tableware production based on pulp molding. Background Technology
[0002] Pulp molding is a three-dimensional papermaking technology that uses waste paper as raw material. It involves shaping paper products into specific forms using special molds on a molding machine. It boasts four major advantages: the raw material is waste paper, including cardboard, waste corrugated cardboard, and waste paper scraps, making it widely available; the production process involves pulping, adsorption molding, drying, and setting, which is environmentally friendly; it is recyclable; and it is smaller than foamed plastics, allowing for stacking and convenient transportation. Besides being used for lunch boxes and tableware, pulp molding is increasingly being used for industrial cushioning packaging, and its development is very rapid.
[0003] Pulp molding drying is the most crucial step in the preparation of molded pulp, as its drying quality determines the quality of the finished product. Pulp molding dryers differ from traditional closed dryers; they are mostly large open or semi-open dryers. Drying has evolved from older methods using combustion heat to the current use of microwave technology. This design is based on in-depth consideration of existing microwave drying technology. The applicant discovered the following technical problems in drying molded pulp tableware using the microwave dryer from Dongguan Ousheng Machinery Equipment Co., Ltd.: Existing technology adjusts the temperature of each section (front, middle, and rear) to regulate the dehydration speed of the molding process, thus preventing delamination and deformation. Uniform heating improves the heat distribution of the product. However, because the products are placed on the conveyor belt surface with the bottom in direct contact, the drying effect cannot be truly uniform. The drying efficiency at the bottom contact point is significantly lower, and despite measures to prevent molding deformation, the defect rate remains high. Therefore, we propose a drying device for molded pulp tableware production. Utility Model Content
[0004] The purpose of this invention is to provide a drying device for tableware production based on pulp molding, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, a drying device for tableware production based on pulp molding is provided, including a microwave heating chamber. A conveyor shaft is provided inside the microwave heating chamber, and the input end of the conveyor shaft is connected to the output end of a drive unit. A conveyor belt is arranged around the outside of the conveyor shaft, and a pad unit for fixing the molding position and reinforcing to prevent molding deformation is provided at the upper end of the conveyor belt.
[0006] Furthermore: the pad unit includes a first pad, a second pad, a third pad, and a fourth pad. The first pad, the second pad, the third pad, and the fourth pad are all fixedly connected to the upper surface of the conveyor belt. Every two of the first pads, the second pad, the third pad, and the fourth pad form a group of pad units. Several groups of pad units are arranged in an array on the surface of the conveyor belt. The cross-sections of the first pad, the second pad, the third pad, and the fourth pad are all L-shaped. The first pad and the second pad are the same size, and the third pad is larger than the fourth pad.
[0007] Furthermore: the lower upper surfaces of the third pad and the fourth pad are at the same horizontal height, and the higher upper surface of the third pad is at a higher horizontal height than the higher upper surface of the fourth pad.
[0008] Furthermore: the drive unit includes a motor, a reducer, a coupling, and a brake; the output end of the motor is connected to one end of the coupling, the other end of the coupling is fixedly connected to the input end of the reducer, and the high-speed shaft of the reducer is equipped with a brake.
[0009] Furthermore, the first, second, third, and fourth pads all include a rubber body and a through groove, with the through groove located on the inner side of the rubber body.
[0010] Furthermore, it also includes a control cabinet for controlling the overall operation and circuit control of the equipment, which can control the operation of the motor and brake in the drive unit.
[0011] Furthermore, the microwave heating chamber is equipped with a flexible output port.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] The design of this utility model can firstly support the molded bottom of the tableware, so that the upper and lower ends face inward and the drying effect is the same. At the same time, by limiting its structure, it can play a certain plastic role, reducing the deformation defect rate caused by drying. In addition, the design has a simple structure, low cost, and is suitable for industrial application. Attached Figure Description
[0014] Figure 1 This is a structural diagram of a drying device for tableware production based on pulp molding, according to this utility model.
[0015] Figure 2 This is a schematic diagram of a drying conveyor belt for tableware production based on pulp molding, according to this utility model.
[0016] Figure 3 This utility model Figure 2Enlarged view of the structure of region A;
[0017] Figure 4 This is a schematic diagram of the placement structure of the molded bowl and molded plate of this utility model;
[0018] Figure 5 This is a schematic diagram of the structure of the first, second, third, and fourth pads of this utility model.
[0019] In the diagram: 1. Microwave heating chamber; 2. Conveyor shaft; 3. Drive unit; 4. Conveyor belt; 5. Output port; 6. Molded plate; 7. Molded bowl; 8. Control cabinet; 41. First pad; 42. Second pad; 43. Third pad; 44. Fourth pad; 401. Rubber body; 402. Through groove. Detailed Implementation
[0020] 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.
[0021] It should be noted in advance that this utility model is an improvement on the microwave dryer of Dongguan Ouximan Machinery Equipment Co., Ltd. This microwave drying line uses microwave heating, and the outer side of the drying chamber has uniform ventilation holes for expelling water vapor. Simultaneously, a temperature control unit is installed inside the drying chamber to monitor the temperature, using a temperature sensor to monitor the temperature inside the chamber. All of the above technologies are existing technologies already implemented in the device. This utility model only lists the components in the existing technology most relevant to the technical improvements of this utility model for explanation of their principles.
[0022] Please see Figure 1-5The figure shows a preferred embodiment of this utility model, a drying device for tableware production based on pulp molding, including a microwave heating chamber 1. A conveyor shaft 2 is disposed inside the microwave heating chamber 1, and the input end of the conveyor shaft 2 is connected to the output end of a drive unit 3. A conveyor belt 4 is arranged around the outside of the conveyor shaft 2. A padding unit for fixing the molding position and reinforcing to prevent molding deformation is disposed at the upper end of the conveyor belt 4. The padding unit includes a first pad 41, a second pad 42, a third pad 43, and a fourth pad 44, all of which are fixedly connected to the conveyor belt 4. On the upper surface, every two of the first pads 41, the second pads 42, the third pads 43, and the fourth pads 44 form a pad unit. Several groups of pad units are arranged in an array on the surface of the conveyor belt 4. The cross-sections of the first pads 41, the second pads 42, the third pads 43, and the fourth pads 44 are all L-shaped. The first pads 41 and the second pads 42 are the same size, the third pads 43 are larger than the fourth pads 44, the lower upper surfaces of the third pads 43 and the fourth pads 44 are at the same horizontal level, and the higher upper surface of the third pads 43 is higher than the higher upper surface of the fourth pads 44.
[0023] In the above structure, it is important to explain that the output port 5 at the equipment outlet will contact the molding plate 6 and the molding bowl 7. This structure is designed to prevent the molding plate 6 and the molding bowl 7 from being pulled out of the pad unit by the reverse force. Since the molding plate 6 has a flat structure, the reaction force it receives from the output port 5 is small and there is no need to worry about it. The main issue is in the fixing structure of the molding bowl 7. The third pad 43 is higher than the fourth pad 44, which can play a stabilizing role. The first pad 41 and the second pad 42 are the same size and have the same horizontal height as the lower upper surface of the third pad 43 and the fourth pad 44, which ensures that the molding plate 6 and the molding bowl 7 are placed horizontally.
[0024] The drive unit 3 includes a motor, a reducer, a coupling, and a brake; the output end of the motor is connected to one end of the coupling, the other end of the coupling is fixedly connected to the input end of the reducer, and the high-speed shaft of the reducer is equipped with a brake.
[0025] This is existing technology, and its purpose is to enable high-speed motors to be adjusted to appropriate output speeds, and to allow brakes to stop the rotation of the starting reducer.
[0026] The first pad 41, the second pad 42, the third pad 43 and the fourth pad 44 all include a rubber body 401 and a through groove 402, wherein the through groove 402 is opened on the inner side of the rubber body 401.
[0027] The purpose of the through groove 402 is to facilitate gas flow, so that the high-temperature gas can contact the molding plate 6 and the molding bowl 7 more evenly.
[0028] A drying device for tableware production based on pulp molding also includes a control cabinet 8 for controlling the overall operation and circuit control of the device. The control cabinet 8 can control the operation of the motor and brake in the drive unit 3.
[0029] The above structure is also existing technology, and we will not elaborate on the principles involved.
[0030] The microwave heating chamber 1 is equipped with an output port flexible port 5 at its output port.
[0031] The design of the flexible outlet 5 can prevent dust from entering the equipment from the outlet.
[0032] In summary, this utility model innovates on the pad unit, specifically for pulp molding for catering, namely molded bowls and molded plates. The improvement provides support to the bottom, allowing air to contact the bottom of the mold, thus ensuring even drying. Secondly, the pad unit prevents molding deformation. It is important to note that the operation of this utility model is consistent with existing technologies; both only require placing the mold on a conveyor belt, which then transports the material to the end, where it is discharged by gravity.
[0033] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0035] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.
Claims
1. A drying apparatus for pulp molded tableware production, comprising a microwave heating chamber (1), characterized in that: The microwave heating chamber (1) is equipped with a transmission shaft (2), the input end of which is connected to the output end of the drive unit (3); a transmission belt (4) is arranged around the outside of the transmission shaft (2), and a pad unit for fixing the molding position and reinforcing to prevent molding deformation is provided at the upper end of the transmission belt (4).
2. A drying apparatus for pulp molded tableware production according to claim 1, characterized in that: The padding unit includes a first pad (41), a second pad (42), a third pad (43), and a fourth pad (44). The first pad (41), the second pad (42), the third pad (43), and the fourth pad (44) are all fixedly connected to the upper surface of the conveyor belt (4). Every two of the first pads (41), the second pad (42), the third pad (43), and the fourth pad (44) form a group of padding units. Several groups of padding units are arranged in an array on the surface of the conveyor belt (4). The cross-sections of the first pad (41), the second pad (42), the third pad (43), and the fourth pad (44) are all L-shaped. The first pad (41) and the second pad (42) are the same size, and the third pad (43) is larger than the fourth pad (44).
3. A drying apparatus for pulp molded tableware production according to claim 2, characterized in that: The lower upper surfaces of the third pad (43) and the fourth pad (44) are at the same horizontal height, while the higher upper surface of the third pad (43) is higher than the higher upper surface of the fourth pad (44).
4. A drying device for tableware production based on pulp molding according to claim 2, characterized in that: The drive unit (3) includes a motor, a reducer, a coupling and a brake; the output end of the motor is connected to one end of the coupling, the other end of the coupling is fixedly connected to the input end of the reducer, and the high-speed shaft of the reducer is equipped with a brake.
5. A drying apparatus for pulp molded tableware production according to claim 2, characterized in that: The first pad (41), the second pad (42), the third pad (43) and the fourth pad (44) all include a rubber body (401) and a through groove (402), wherein the through groove (402) is opened on the inner side of the rubber body (401).
6. A drying apparatus for pulp molded tableware production according to claim 1, characterized in that: It also includes a control cabinet (8) for controlling the overall operation and circuit control of the equipment, which can control the operation of the motor and brake in the drive unit (3).
7. A drying apparatus for pulp molded tableware production according to claim 1, characterized in that: The microwave heating chamber (1) is equipped with an output port flexible port (5).