A feeding pipe control device for an EPP forming machine
Patent Information
- Application Number
- CN202522015200.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-19
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-09-19
AI Technical Summary
Traditional EPP molding machines have difficulty accurately controlling the amount of material fed, resulting in insufficient filling or excessive excess material, which affects product quality and production efficiency.
It adopts a combined structure of mounting shell, first hopper, second hopper and third hopper, combined with the use of weight sensor and solenoid valve to achieve precise control of material weight and mixing ratio.
It improves the accuracy of material feeding in EPP molding machines, reduces raw material waste, lowers production costs, and increases production efficiency.
Smart Images
Figure CN224928294U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of EPP molding machine design technology, and in particular to a material feeding control device for an EPP molding machine. Background Technology
[0002] EPP (expanded polypropylene), as a new type of foamed plastic material, has been widely used in many fields in recent years. In the automotive industry, it is extensively used to manufacture bumper cores, anti-collision blocks, headliners, door panels, headrests, and sun visors, effectively saving fuel and significantly improving passenger safety. In the packaging field, especially for electronic products, medical devices, and export products, its environmentally friendly properties have made it an irreplaceable packaging material. Furthermore, given its non-toxicity and high temperature resistance, it is also widely used in food packaging and microwave heating.
[0003] In the production process of EPP products, EPP beads need to be molded into various shapes in the mold of a molding machine. As the starting point and key step of the entire molding process, the accuracy of its control has a crucial impact on the quality of the final product and production efficiency.
[0004] Currently, in the feeding process of EPP molding machines, traditional feeding devices struggle to accurately control the material feed rate, frequently resulting in insufficient filling or excessive material residue. Insufficient filling leads to incomplete product molding and quality defects; excessive material residue not only wastes raw materials and increases production costs but may also require additional processes to handle the excess material, reducing production efficiency.
[0005] Therefore, it is necessary to propose a technical means to solve the above-mentioned defects. Utility Model Content
[0006] The present invention adopts the following technical solution:
[0007] A material feeding control device for an EPP molding machine includes a mounting shell, a first feeding hopper, a second feeding hopper, and a third feeding hopper. The mounting shell contains a first feeding chamber and a second feeding chamber arranged side-by-side. The first feeding hopper and the second feeding hopper are movably mounted within the first feeding chamber and the second feeding chamber, respectively. A first weight sensor connected to the first feeding hopper and used to measure the weight of the first feeding hopper is located within the first feeding chamber. A first feeding pipe is located at the bottom of the first feeding hopper, and a first solenoid valve is located within the first feeding pipe. A second weight sensor connected to the second feeding hopper and used to measure the weight of the second feeding hopper is located within the second feeding chamber. A second feeding pipe is located at the bottom of the second feeding hopper, and a second solenoid valve is located within the second feeding pipe. The third feeding hopper is movably mounted at the bottom of the mounting shell to receive materials discharged from the first feeding pipe and the second feeding pipe. A third weight sensor connected to the third feeding hopper is located on the outside of the mounting shell. A third feeding pipe is located at the bottom of the third feeding hopper, and a third solenoid valve is located within the third feeding pipe.
[0008] The first feeding tube has a first connecting plate on both sides; a second connecting plate is provided below the first connecting plate and connected to the inner wall of the first feeding chamber; the first weight sensor is installed between the first connecting plate and the second connecting plate.
[0009] Preferably, a third connecting plate is provided on both sides of the second feeding pipe; a fourth connecting plate connected to the second feeding cavity is provided below the third connecting plate; and the second weight sensor is installed between the third connecting plate and the fourth connecting plate.
[0010] Preferably, a fifth connecting plate is provided on the upper inner side of the third hopper; a sixth connecting plate is provided below the fifth connecting plate and connected to the outer side of the mounting shell; the third weight sensor is installed between the fifth connecting plate and the sixth connecting plate.
[0011] The present invention relates to a material feeding control device for an EPP molding machine. By setting up a housing 10, a first feeding hopper, a second feeding hopper, and a third feeding hopper, it can effectively control the mixing ratio and feeding weight of materials, improve the accuracy of the feeding amount of the EPP molding machine, and is suitable for industrial applications. Attached Figure Description
[0012] Figure 1 This is an overall schematic diagram of the feeding control device for an EPP molding machine according to the present invention;
[0013] Figure 2 for Figure 1 A schematic diagram of the whole structure in cross-section. Detailed Implementation
[0014] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0015] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0017] Please see Figure 1 and Figure 2A feeding control device for an EPP molding machine includes a mounting shell 10, a first feeding hopper 20, a second feeding hopper 30, and a third feeding hopper 40. The mounting shell 10 contains a first feeding chamber 101 and a second feeding chamber 102 arranged side-by-side. The first feeding hopper 20 and the second feeding hopper 30 are movably mounted within the first feeding chamber 101 and the second feeding chamber 102, respectively. The first feeding chamber 101 contains a first weight sensor 50 connected to the first feeding hopper 20 for measuring its weight. The bottom of the first feeding hopper 20 contains a first feeding pipe 201, and the first feeding pipe 201 contains a first solenoid valve (not shown in the figure). The second feeding chamber 102 is equipped with a second weight sensor 60 connected to the second feeding hopper 30 for measuring the weight of the second feeding hopper 30; the bottom of the second feeding hopper 30 is equipped with a second feeding pipe 301, and the second feeding pipe 301 is equipped with a second solenoid valve (not shown in the figure); the third feeding hopper 40 is movably installed at the bottom of the mounting shell 10 for receiving materials discharged from the first feeding pipe 201 and the second feeding pipe 301, and the outside of the mounting shell 10 is equipped with a third weight sensor 70 connected to the third feeding hopper 40; the bottom of the third feeding hopper 40 is equipped with a third feeding pipe 401, and the third feeding pipe 401 is equipped with a third solenoid valve (not shown in the figure).
[0018] Specifically, during use, EPP beads and additives are loaded into the first hopper 20 and the second hopper 30 respectively, and their corresponding weights are measured by the first weight sensor 50 and the second weight sensor 60. Then, according to the required feed amount of the EPP molding machine mold, the first weight solenoid valve (not shown in the figure) and the second solenoid valve (not shown in the figure) are opened accordingly, allowing the EPP beads and additives loaded in the first hopper 20 and the second hopper 30 to enter the third hopper 40 through the first feed pipe 201 and the second feed pipe 301 respectively. Simultaneously, the EPP is monitored by the first weight sensor 50 and the second weight sensor 60. The feeding amount of EPP beads and additives is monitored. Once the feeding amount reaches the preset value, the first solenoid valve (not shown in the figure) and the second solenoid valve (not shown in the figure) are closed accordingly. This allows for precise control of the feeding ratio of EPP beads and additives. The weight of the EPP beads and additives entering the third feeding hopper 40 is monitored in real time by the setting of the third weight sensor 70. The feeding is controlled by the third solenoid valve (not shown in the figure) in the third feeding pipe 401. When the weight of the EPP beads and additives in the third feeding hopper 40 drops to the preset amount, the third solenoid valve (not shown in the figure) is closed. This ensures precise feeding of the mixed material. Furthermore, the first, second, and third weight sensors transmit signals to the PLC control system in real time (response time ≤ 10ms). When the detected material weight reaches 95% of the preset value, the system sends a signal to close the solenoid valve in advance to compensate for the residual material in the feeding pipe (the residual amount is calibrated to 0.5-1g), ensuring that the actual feeding amount error is ≤ ±0.3%. Meanwhile, since the first, second, and third weight sensors are symmetrically located on both sides of their respective hoppers, the weight of the hopper and the material inside it is the sum of the values of the corresponding weight sensors on both sides during actual measurement.
[0019] In one specific embodiment, a first connecting plate 202 is provided on both sides of the first feeding pipe 201; a second connecting plate 103 connected to the inner wall of the first feeding cavity 101 is provided below the first connecting plate 202; and a first weight sensor 50 is installed between the first connecting plate 202 and the second connecting plate 103.
[0020] In one specific embodiment, a third connecting plate 302 is provided on both sides of the second feeding pipe 301; a fourth connecting plate 104 connected to the second feeding cavity is provided below the third connecting plate 302; and a second weight sensor 60 is installed between the third connecting plate 302 and the fourth connecting plate 104.
[0021] In one specific embodiment, a fifth connecting plate 402 is provided on the upper inner side of the third hopper 40; a sixth connecting plate 105 connected to the outer side of the mounting shell 10 is provided below the fifth connecting plate 402; and a third weight sensor 70 is installed between the fifth connecting plate 402 and the sixth connecting plate 105.
[0022] The present invention relates to a material feeding control device for an EPP molding machine. By setting up a housing 10, a first feeding hopper 20, a second feeding hopper 30, and a third feeding hopper 40, it can effectively control the mixing ratio and feeding weight of materials, improve the accuracy of the feeding amount of the EPP molding machine, and is suitable for industrial applications.
[0023] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A feeding control device for an EPP molding machine, characterized in that: The device includes a mounting shell, a first hopper, a second hopper, and a third hopper. The mounting shell contains a first discharge chamber and a second discharge chamber arranged side-by-side. The first and second hoppers are movably mounted within the first and second discharge chambers, respectively. A first weight sensor, connected to the first hopper, is located within the first discharge chamber and is used to measure the weight of the first hopper. A first discharge pipe, containing a first solenoid valve, is located at the bottom of the first hopper. A second weight sensor, connected to the second hopper, is located within the second discharge chamber and is used to measure the weight of the second hopper. A second discharge pipe, containing a second solenoid valve, is located at the bottom of the second hopper. The third hopper is movably mounted at the bottom of the mounting shell to receive materials discharged from the first and second discharge pipes. A third weight sensor, connected to the third hopper, is located on the outside of the mounting shell. A third discharge pipe, containing a third solenoid valve, is located at the bottom of the third hopper.
2. The feeding control device for an EPP molding machine according to claim 1, characterized in that: The first feeding tube has a first connecting plate on both sides; a second connecting plate is provided below the first connecting plate and connected to the inner wall of the first feeding chamber; the first weight sensor is installed between the first connecting plate and the second connecting plate.
3. The feeding control device for an EPP molding machine according to claim 1, characterized in that: The second feeding tube is provided with third connecting plates on both sides; a fourth connecting plate connected to the second feeding cavity is provided below the third connecting plate; the second weight sensor is installed between the third connecting plate and the fourth connecting plate.
4. The feeding control device for an EPP molding machine according to claim 1, characterized in that: The upper inner side of the third hopper is provided with a fifth connecting plate; a sixth connecting plate is provided below the fifth connecting plate and connected to the outer side of the mounting shell; the third weight sensor is installed between the fifth connecting plate and the sixth connecting plate.