Polyurethane casting machine based on heat preservation oil circuit optimization device

Abstract

The utility model discloses a polyurethane casting machine based on heat preservation oil line optimization device, including the head, A material jar, heating oil tank and B material jar, A material jar and B material jar all with the material cavity of head are linked with the feeding pipeline intercommunication, and the heat preservation oil line is arranged between heating oil tank and feeding pipeline. The utility model has the beneficial effects that: the optimized oil line adopts double -layer pipeline structure and the design of partition temperature control, makes the heat transfer of heat preservation oil liquid and raw material liquid more uniform, reduces the heat loss caused by long -distance delivery, effectively keeps the constancy of raw material temperature, realizes direct heat preservation through setting temperature adjusting unit in material jar end, and heating oil tank load reduces, and the oil line layout is more reasonable, adopts two hydraulic motors to control oil liquid circulation and temperature reflux respectively, makes each oil temperature can be independently regulated, and temperature control system reaction speed is faster, and oil temperature fluctuation range reduces, improves the stability of polyurethane mixing ratio.

Description

Technical Field

[0001] This utility model relates to a polyurethane casting machine, specifically a polyurethane casting machine based on an optimized heat insulation oil circuit device, belonging to the field of temperature control technology for polyurethane casting equipment. Background Technology

[0002] A polyurethane casting machine is a specialized piece of equipment used to meter, mix, and cast polyurethane raw materials into molds according to a set ratio. It is widely used in industries such as automotive, home appliances, construction, insulation materials, furniture, and electronics. This equipment typically consists of a metering system, a mixing system, a temperature control system, a hydraulic system, and a control system. Through precise flow control and temperature regulation, it ensures the stability and uniformity of the polyurethane raw materials during the reaction and molding process. Polyurethane casting machines enable automated and continuous production, featuring high metering accuracy, excellent mixing effect, and safe and reliable operation. It is one of the key core pieces of equipment in polyurethane product manufacturing.

[0003] Polyurethane raw materials are highly sensitive to temperature changes. Uneven heating or poor insulation in the oil circuit can easily lead to inconsistent viscosity changes in the raw materials, affecting the mixing ratio and flow properties, and consequently causing quality problems such as bubbles, shrinkage cavities, or uneven hardness in the finished product. Existing polyurethane casting machine insulation systems mostly use a single-loop heating method, resulting in significant heat loss of the oil during long-distance transportation. Furthermore, the temperature at different workstations cannot be independently adjusted, leading to insufficient temperature control precision. At the same time, traditional oil circuit layouts are complex and have low circulation efficiency, with some areas experiencing oil temperature lag or localized overheating, which not only affects the casting effect but also increases energy consumption and maintenance costs. Utility Model Content

[0004] The purpose of this utility model is to provide a polyurethane casting machine based on an optimized thermal insulation oil circuit device to solve at least one of the above-mentioned technical problems.

[0005] The present invention achieves the above objectives through the following technical solution: a polyurethane casting machine based on a thermal insulation oil circuit optimization device, comprising an integrated assembly of a machine head, an A material tank, a heating oil tank and a B material tank, wherein the A material tank and the B material tank are both connected to the material cavity of the machine head through a feeding pipe, and a thermal insulation oil circuit is provided between the heating oil tank and the feeding pipe. The feeding pipeline is a double-layer pipeline, and the liquid from tanks A and B flows in the middle pipeline of the feeding pipeline, while the heat-insulating oil supplied by the heating oil tank circulates in the outer pipeline of the feeding pipeline. It also includes temperature control units installed in tanks A and B, which are connected to the feeding pipeline.

[0006] As a further embodiment of this utility model: the top of material tank A is fixedly connected to a material tank conveying pump that is connected to a feeding pipe, and the top of material tank B is fixedly connected to a material tank conveying pump that is connected to a feeding pipe. The liquid in material tank A and material tank B are respectively conveyed in the feeding pipe by material tank conveying pump A and material tank conveying pump B.

[0007] As a further improvement of this utility model: a heating oil tank circulation pump connected to the heat preservation oil circuit is fixedly connected to the top of the heating oil tank. The heating oil tank circulation pump pressurizes and drives the heat preservation hydraulic oil in the heating oil tank to circulate between the heat preservation oil circuit and the heating oil tank.

[0008] As a further improvement of this utility model: a machine head stirring motor is installed on the machine head, and the stirring end of the machine head stirring motor is placed in the material chamber inside the machine head, and the discharge end of the machine head is connected to a discharge port.

[0009] As a further improvement of this utility model, the polyurethane casting machine also integrates a control panel, which is connected to the signals of various electrical components.

[0010] As a further embodiment of this utility model: the feeding pipe connecting material tank A and material tank B can also be installed inside the heating oil tank, and the liquid output from material tank A and material tank B is heated by the heat-insulating hydraulic oil in the heating oil tank and then transported to the material chamber of the machine head.

[0011] As a further improvement of this utility model, the polyurethane casting machine also includes a heat preservation and circulation control unit. The temperature regulation unit performs preliminary heating of the liquid material, and the heat preservation and circulation control unit pumps the heat preservation oil back to the heating oil tank for circulation heating and temperature maintenance through the heating oil tank circulation pump.

[0012] The beneficial effects of this utility model are as follows: The optimized oil circuit adopts a double-layer pipeline structure and a zoned temperature control design, which makes the heat transfer between the insulation oil and the raw material liquid more uniform, reduces the heat loss caused by long-distance transportation, and effectively maintains the constant temperature of the raw material. Direct insulation is achieved by setting a temperature adjustment unit at the end of the material tank, reducing the load on the heating oil tank and making the oil circuit layout more reasonable. The use of dual hydraulic motors to control the oil circulation and temperature reflux separately allows the oil temperature of each circuit to be adjusted independently, the temperature control system reacts faster, the oil temperature fluctuation range is reduced, and the stability of the polyurethane mixing ratio is improved. The optimized insulation oil circuit reduces unnecessary heat circulation and energy waste, reducing the overall energy consumption of the equipment. At the same time, due to the simplification of the oil circuit and the balanced heat load, the system maintenance cycle is extended and the operation is more reliable. By realizing constant temperature transportation and mixing of raw materials throughout the process, the reaction conditions of polyurethane raw materials are ensured to be stable during the casting process, thereby significantly improving the density uniformity and surface quality of the product. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the insulation oil circuit of the original polyurethane casting machine; Figure 3 Schematic diagram of the heat preservation oil circuit optimization device.

[0014] In the diagram: 1. Machine head; 2. Control panel; 3. Machine head mixing motor; 4. A material tank conveying pump; 5. A material tank; 6. Heating oil tank circulating oil pump; 7. B material tank conveying pump; 8. Heating oil tank; 9. B material tank; 10. Discharge port. Detailed Implementation

[0015] 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.

[0016] Example 1, as Figures 1 to 3 As shown, a polyurethane casting machine based on an optimized heat-insulating oil circuit includes an integrated machine head 1, an A material tank 5, a heating oil tank 8, and a B material tank 9. Both the A material tank 5 and the B material tank 9 are connected to the material cavity of the machine head 1 through a feeding pipe. A heat-insulating oil circuit is provided between the heating oil tank 8 and the feeding pipe. The feeding pipeline is a double-layer pipeline, and the liquid in tank A 5 and tank B 9 flows in the middle pipeline of the feeding pipeline, while the heat-insulating oil supplied by the heating oil tank 8 circulates in the outer ring pipeline of the feeding pipeline. The polyurethane casting machine also includes a temperature control unit installed in tanks A 5 and B 9. The temperature control unit is connected to the feeding pipeline, realizing full-process, dynamic and uniform heating and insulation of the material during the conveying process. The outer ring of circulating insulation oil forms a wrap-around heat exchange environment, which can minimize the heat loss of the liquid during the long process of conveying the liquid from the tank to the machine head 1, and ensure the temperature stability and consistency of the two raw materials A and B before entering the mixing process. This solves a series of quality problems caused by temperature fluctuations, such as changes in the viscosity of the raw materials and imbalances in the mixing ratio.

[0017] Example 2: In addition to all the technical features in Example 1, this example also includes: A material tank 5 is fixedly connected to the top of an A material tank pump 4 that is connected to a feeding pipe, and B material tank 9 is fixedly connected to the top of a B material tank pump 7 that is connected to a feeding pipe. The liquid in A material tank 5 and B material tank 9 flows and is transported in the feeding pipe via A material tank pump 4 and B material tank pump 7, respectively.

[0018] A heating oil tank circulating pump 6, which is connected to the insulation oil circuit, is fixedly connected to the top of the heating oil tank 8. The heating oil tank circulating pump 6 boosts and drives the insulation hydraulic oil in the heating oil tank 8 to circulate between the insulation oil circuit and the heating oil tank 8. The insulation hydraulic oil flows through the outer ring pipe of the feeding pipe, thereby heating and insulating the liquid material in the middle pipe. The heating oil tank circulating pump 6 delivers the insulation hydraulic oil in the insulation oil circuit to the heating oil tank 8, so that the oil is quickly drawn back to the heating oil tank 8 for circulation heating. It then flows through the A material pipe and the B material pipe for heating and insulation, realizing the directional and forced circulation of the insulation oil. Through the division of labor and cooperation of the two hydraulic motors, a highly efficient closed-loop heat exchange system is formed.

[0019] A head stirring motor 3 is installed on the head 1, and the stirring end of the head stirring motor 3 is placed in the material chamber inside the head 1. The discharge end of the head 1 is connected to the discharge port 10. The head stirring motor 3 drives its stirring end to rotate at high speed in the material chamber, so that the two raw materials A and B, which are transported through the feeding pipe and have been precisely temperature-controlled and metered, undergo vigorous and thorough physical mixing here, triggering a chemical reaction to form a homogeneous polyurethane mixture. Subsequently, the mixed liquid can be injected into the mold through the discharge port 10 for final molding.

[0020] The polyurethane casting machine also integrates a control panel 2, which is connected to various electrical components. The control panel 2 can control the mixing motor 3 of the machine head and various electrical components, such as the proportional regulating valve, so that the two raw materials A and B enter the mixing head in a set ratio and are fully mixed.

[0021] Example 3: In addition to all the technical features in Example 1, this example also includes: the feeding pipe connecting material tank 5 (A) and material tank 9 (B) can also be installed inside the heating oil tank 8. The liquid material output from material tank 5 (A) and material tank 9 is heated by the insulating hydraulic oil in the heating oil tank 8 and then transported to the material chamber of the machine head 1. This allows the liquid material to be heated by the insulating hydraulic oil in the heating oil tank 8 before being transported to the material chamber of the machine head 1. In other words, the material pipe is directly immersed in the oil in the heating oil tank 8, and heat exchange is carried out through static or low-speed oil bath. Combined with the double-layer pipe design of the feeding pipe, the heat transfer between the insulating oil and the raw material liquid is more uniform, reducing heat loss caused by long-distance transportation and effectively maintaining the constant temperature of the raw material.

[0022] Example 4: In addition to all the technical features in Example 1, this example also includes: the polyurethane casting machine further includes a heat preservation and circulation control unit. The temperature regulation unit performs preliminary heating of the liquid material. The heat preservation and circulation control unit pumps the heat preservation oil back to the heating oil tank 8 through the heating oil tank circulation pump 6 for circulation heating and temperature maintenance, thereby achieving full heat preservation during the conveying process. The preheated and heat-preserved material A and material B are conveyed to the machine head 1 for proportional mixing to generate polyurethane. The remaining liquid material flows directly back to material A tank 5 and material B tank 9 without needing to be circulated back through the heating oil tank 8. At the same time, the heating oil tank circulation pump 6 pumps the heat preservation oil back to the heating oil tank 8 for circulation heating and temperature maintenance, thereby achieving efficient heat preservation and energy-saving operation of the oil circuit system.

[0023] The circulating oil pump 6 drives the insulated hydraulic oil to circulate through the A material pipeline and the B material pipeline, achieving continuous heating and insulation of the raw material transportation process. The circulating oil pump 6 can also quickly return the oil to the heating oil tank for circulation and heating, ensuring stable raw material temperature. The optimized oil circuit structure adds temperature regulation units to the A material tank 5 and the B material tank 9 to preheat the raw materials, so that the A and B materials can be kept at a constant temperature before entering the mixing head, without the need for recirculation through the heating oil tank. Through independent oil circuit control and zoned insulation design, precise control of raw material temperature and efficient utilization of heat are achieved, improving the stability of the casting process and the molding quality of the product.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A polyurethane casting machine based on an optimized thermal insulation oil circuit device, comprising an integrated machine head (1), an A-type material tank (5), a heating oil tank (8), and a B-type material tank (9), characterized in that: Both the A material tank (5) and the B material tank (9) are connected to the material cavity of the machine head (1) through the feeding pipe, and a heat-insulating oil circuit is provided between the heating oil tank (8) and the feeding pipe; The feeding pipe is a double-layer pipe, and the liquid in the A tank (5) and the B tank (9) flows in the middle pipe of the feeding pipe, while the heat-insulating oil supplied by the heating oil tank (8) circulates in the outer ring pipe of the feeding pipe. It also includes a temperature regulating unit installed in tank A (5) and tank B (9), the temperature regulating unit being connected to the feeding pipe.

2. The polyurethane casting machine according to claim 1, characterized in that: The top of the A tank (5) is fixedly connected to the A tank conveying pump (4) which is connected to the feeding pipe, and the top of the B tank (9) is fixedly connected to the B tank conveying pump (7) which is connected to the feeding pipe. The liquid in the A tank (5) and the B tank (9) flows and is conveyed in the feeding pipe through the A tank conveying pump (4) and the B tank conveying pump (7), respectively.

3. The polyurethane casting machine according to claim 1, characterized in that: The top of the heating oil tank (8) is fixedly connected to a heating oil tank circulation pump (6) that is connected to the heat preservation oil circuit. The heating oil tank circulation pump (6) boosts the pressure and drives the heat preservation hydraulic oil in the heating oil tank (8) to circulate between the heat preservation oil circuit and the heating oil tank (8).

4. The polyurethane casting machine according to claim 1, characterized in that: The head (1) is equipped with a head stirring motor (3), and the stirring end of the head stirring motor (3) is placed in the material chamber inside the head (1). The discharge end of the head (1) is connected to a discharge port (10).

5. The polyurethane casting machine according to claim 1, characterized in that: The polyurethane casting machine also integrates a control panel (2), which is connected to the signals of various electrical components.

6. The polyurethane casting machine according to claim 1, characterized in that: The feeding pipes connected to the A material tank (5) and the B material tank (9) can also be installed in the heating oil tank (8), and the liquid output from the A material tank (5) and the B material tank (9) is heated by the heat-insulating hydraulic oil in the heating oil tank (8) and then transported to the material chamber of the machine head (1).

7. The polyurethane casting machine according to claim 1, characterized in that: The polyurethane casting machine also includes a heat preservation and circulation control unit. The temperature regulation unit performs preliminary heating of the liquid material. The heat preservation and circulation control unit pumps the heat preservation oil back to the heating oil tank (8) through the heating oil tank circulation pump (6) for circulation heating and temperature maintenance.

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