Pre-foaming machine for EPS (Expandable Polystyrene) foam

Abstract

The utility model relates to the technical field of EPS foam production equipment, and discloses an EPS foam pre-foaming machine which comprises a pre-foaming tank and a supporting frame, a transverse plate is fixed to the position, close to the top end, of one side of the pre-foaming tank, and a temperature sensor is installed on one side of the inner wall of the pre-foaming tank. Raw materials are fed at the position of the feeding port during EPS foam pre-foaming treatment, then foaming agents needing to be used are added and stored in the material box at the position of the adding port in one side of the top end of the material box, and a circulating effect is formed after the connecting pipe and the inclined material guiding pipe are communicated with each other, so that circulating of the foaming agents is facilitated, and the foaming agents are prevented from entering the material box. When the foaming agent does not need to be added, the threaded rod is rotated, then the sealing ball is moved into the connecting pipe, the sealing ball and the sealing ring are matched to complete sealing treatment on the position of the connecting pipe, then the threaded rod can be reversely rotated when the foaming agent needs to be added, and the sealing ball is moved out of the interior of the connecting pipe; therefore, the foaming agent adding convenience is improved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of EPS foam production equipment, in particular to an EPS foam pre-expanding machine. Background Art

[0002] EPS is expanded polystyrene, a lightweight porous polymer. It is manufactured by adding a foaming agent to a polystyrene resin. After heating, a closed honeycomb structure with bubbles inside is produced. EPS molded foam, also known as polystyrene foam, is a lightweight polymer that is heated to soften and produce gas to form a rigid closed-cell foam plastic.

[0003] In the process of EPS foam processing and production, pre-expansion treatment is required, so a pre-expansion machine is needed to complete this task. The pre-expansion machine is the core equipment in the foam product manufacturing process. It uses a rotary stirring method to perform pre-expansion treatment. During the pre-expansion, a foaming agent needs to be added to promote the expansion of the beads, thereby forming EPS foam with the desired structure and performance. The addition of the foaming agent directly affects the expansion degree of the EPS foam, and then affects the overall performance of the foam. In the prior art, manual addition is adopted, and the pre-expansion tank needs to be opened first, and then the foaming agent is added. The addition of the foaming agent is not convenient, which reduces the production efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide an EPS foam pre-expander to solve the problem that the pre-expander is the core equipment in the manufacturing process of foam products, and the pre-expander is carried out by rotating stirring. During the pre-expander, a foaming agent needs to be added. If the foaming agent is not convenient to add at this time, it is easy to directly affect the convenience of the pre-expander process.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pre-expanding machine for EPS foam, comprising a pre-expanding tank and a support frame, a horizontal plate is fixed at a position near the top of one side of the pre-expanding tank, a material box is installed on one side of the top of the horizontal plate, a connecting pipe is installed on one side of the interior of the material box, an inclined material guide pipe is installed on one side of the connecting pipe, a threaded rod is connected to the interior of the material box, an adjusting nut is installed on the outer side wall of one side of the material box, a sealing ball is fixed on one side of the threaded rod, a sealing ring is fixed on the outer side wall of one side of the sealing ball, and a temperature sensor is installed on one side of the inner wall of the pre-expanding tank.

[0006] Preferably, one side of the inclined material guide pipe is communicated with the interior of the connecting pipe, and the other side of the inclined material guide pipe is communicated with the interior of the pre-fermenting tank.

[0007] Preferably, a threaded adjustment is formed between the threaded rod and the adjusting nut, and an adhesive connection is formed between the sealing ring and the sealing ball.

[0008] Preferably, the diameter of the sealing ball matches the diameter of the inside of the connecting pipe, and a filling port is installed on one side of the top of the material box.

[0009] Preferably, a discharge port is installed at the middle position of the bottom of the pre-expanding tank, and feed ports are installed on both sides of the top of the pre-expanding tank. An arc-shaped mounting plate is installed on the inner wall of the feed port, and a mounting ring is connected to the top of the arc-shaped mounting plate, and a filter is fixed inside the mounting ring.

[0010] Preferably, the top end of the discharge port is interconnected with the interior of the pre-expanding tank, the feed port is symmetrically distributed about the central axis of the pre-expanding tank, and the arc-shaped mounting plate is symmetrically distributed about the central axis of the feed port.

[0011] Preferably, a working motor is installed at the middle position of the top of the pre-fermenting tank, the output end of the working motor is connected to an output shaft, and stirring blades are fixed at positions near the bottom on both sides of the output shaft.

[0012] Preferably, a connecting seat is installed near the middle of both sides of the output shaft, a connecting rod is installed inside the connecting seat, a scraper is installed on one side of the connecting rod, and a connecting pin is installed between the connecting rod and the connecting seat.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the EPS foam pre-expander not only improves the foaming agent adding capacity, but also improves the feed filtering capacity and inner wall cleaning capacity of the pre-expander;

[0014] (1) The raw materials for the EPS foam pre-expansion process are fed at the feed port, and then the foaming agent to be used is added and stored inside the material box at the adding port on the top side of the material box. The connecting pipe and the inclined guide pipe are connected to each other to form a flowable effect, and the inclined guide pipe is inclined to facilitate the flow of the foaming agent. When it is not necessary to add the foaming agent, the threaded rod is rotated to move the sealing ball to the inside of the connecting pipe, and the sealing ball and the sealing ring cooperate to complete the sealing process of the connecting pipe position. When it is necessary to add the foaming agent, the threaded rod can be rotated in the opposite direction to move the sealing ball out of the connecting pipe. Therefore, the overall foaming agent adding capacity is better improved during the working process, the convenience of adding the foaming agent is improved, and the production efficiency of the EPS foam pre-expansion machine is improved;

[0015] (2) By installing the feed port on both sides of the top of the pre-expeller tank, since the inner wall of the feed port is installed with an arc-shaped mounting plate, the connection and installation between the arc-shaped mounting plate and the mounting ring are completed at the position of the arc-shaped mounting plate during operation. The connection between the mounting ring and the arc-shaped mounting plate can be completed by screws, and then the filter screen is fixed inside the mounting ring. Therefore, the material can be filtered through the filter screen during operation, thereby improving the overall feed filtering ability during operation and improving the discharge quality and uniformity of EPS foam;

[0016] (3) The connecting seat is installed on both sides of the output shaft, and the connecting rod is inserted into the inside of the connecting seat during operation. The connecting pin is used to complete the connection and installation between the connecting seat and the connecting rod, thereby completing the construction of the connecting rod. A scraper is then installed on the side of the connecting rod. Therefore, when the output shaft rotates, the scraper is used to clean the inner wall of the pre-expeller tank, thereby better improving the overall inner wall cleaning ability during the working process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 It is a partial front view structural diagram of the material box of the utility model;

[0019] Figure 3 This is a schematic diagram of the top view of the feed port of the utility model;

[0020] Figure 4 It is a partial front view cross-sectional structural schematic diagram of the connecting seat of the utility model.

[0021] In the figure: 1. pre-fermenting tank; 2. feed port; 3. working motor; 4. output shaft; 5. temperature sensor; 6. connecting rod; 7. scraper; 8. stirring blade; 9. support frame; 10. discharge port; 11. connecting seat; 12. horizontal plate; 13. oblique guide pipe; 14. connecting pipe; 15. sealing ring; 16. threaded rod; 17. adjusting nut; 18. material box; 19. sealing ball; 20. arc-shaped mounting plate; 21. mounting ring; 22. filter screen; 23. connecting pin. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4The utility model provides an embodiment: a pre-expanding machine for EPS foam, comprising a pre-expanding tank 1 and a support frame 9. A horizontal plate 12 is fixed at a position near the top of one side of the pre-expanding tank 1, a material box 18 is installed on one side of the top of the horizontal plate 12, a connecting pipe 14 is installed on one side of the inside of the material box 18, an oblique material guide pipe 13 is installed on one side of the connecting pipe 14, a threaded rod 16 is connected to the inside of the material box 18, an adjusting nut 17 is installed on the outer side wall of one side of the material box 18, a sealing ball 19 is fixed on one side of the threaded rod 16, a sealing ring 15 is fixed on the outer side wall of one side of the sealing ball 19, and a temperature sensor 5 is installed on one side of the inner wall of the pre-expanding tank 1.

[0024] One side of the inclined material guide pipe 13 is communicated with the interior of the connecting pipe 14 , and the other side of the inclined material guide pipe 13 is communicated with the interior of the pre-fermenting tank 1 .

[0025] A threaded adjustment is formed between the threaded rod 16 and the adjusting nut 17 , the adjusting nut 17 is fixedly connected to the side wall of the material box 18 , and an adhesive connection is formed between the sealing ring 15 and the sealing ball 19 .

[0026] The diameter of the sealing ball 19 matches the diameter of the inside of the connecting pipe 14 , and a feeding port is installed on one side of the top of the material box 18 .

[0027] A discharge port 10 is installed at the middle position of the bottom of the pre-expanding tank 1, and a feed port 2 is installed on both sides of the top of the pre-expanding tank 1. An arc-shaped mounting plate 20 is installed on the inner wall of the feed port 2. A mounting ring 21 is connected to the top of the arc-shaped mounting plate 20, and a filter screen 22 is fixed inside the mounting ring 21.

[0028] The top end of the discharge port 10 is connected to the interior of the pre-expanding tank 1 , the feed port 2 is symmetrically distributed about the central axis of the pre-expanding tank 1 , and the arc-shaped mounting plate 20 is symmetrically distributed about the central axis of the feed port 2 .

[0029] A working motor 3 is installed at the middle position of the top of the pre-fermenting tank 1, and an output shaft 4 is connected to the output end of the working motor 3. Stirring blades 8 are fixed at positions near the bottom of both sides of the output shaft 4.

[0030] A connecting seat 11 is installed near the middle of both sides of the output shaft 4, a connecting rod 6 is installed inside the connecting seat 11, a scraper 7 is installed on one side of the connecting rod 6, and a connecting pin 23 is installed between the connecting rod 6 and the connecting seat 11;

[0031] Further, the arc-shaped mounting plate 20 is connected to the mounting ring 21 by screws, thereby facilitating the installation and disassembly of the mounting ring 21 .

[0032] In order to increase the amount of foaming agent added, the present embodiment also includes a rotating motor, a resistive oil level sensor, and a processor. The resistive oil level sensor is installed in the material box 18 to detect the height of the foaming agent in the material box 18. The resistive oil level sensor is electrically connected to the processor for inputting a height signal of the foaming agent in the material box 18. The rotating end of the rotating motor is used to rotate the threaded rod 16. The fixed end of the rotating motor is slidably connected to the cross plate 12 through a slide rail slider. The slider is installed on the cross plate 12. One end of the slider is installed below the fixed end of the rotating motor, and the other end of the slider is slidably assembled with the slide rail. The processor is electrically connected to the rotating motor and is used to input a forward and reverse rotation signal of the rotating motor. The height of the foaming agent in the material box 18 is detected by the resistive oil level sensor to control the forward and reverse rotation of the motor, thereby realizing quantitative addition of the foaming agent.

[0033] Working principle: First, the raw materials are fed at the feed port 2, and then the foaming agent to be used is added and stored in the material box 18 at the adding port on the top side of the material box 18. The connecting pipe 14 and the inclined guide pipe 13 are connected to each other to form a flowable effect, and the inclined guide pipe 13 is inclined. When there is no need to add foaming agent, the threaded rod 16 is rotated to move the sealing ball 19 to the inside of the connecting pipe 14, and the sealing ball 19 and the sealing ring 15 cooperate to complete the sealing treatment of the connecting pipe 14. Then, when it is necessary to add foaming agent, the threaded rod 16 can be rotated in the opposite direction to move the sealing ball 19 out of the connecting pipe 14. Then, the working motor 3 is started to drive the output shaft 4 to rotate. At this time, the stirring blade 8 is used to cooperate to complete the pre-treatment, and finally the material can be discharged at the discharge port 10.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A pre-expanding machine for EPS foam, comprising a pre-expanding tank (1) and a support frame (9), characterized in that: A transverse plate (12) is fixed at a position near the top of one side of the pre-expanding tank (1), a material box (18) is installed on one side of the top of the transverse plate (12), a connecting pipe (14) is installed on one side of the interior of the material box (18), an inclined material guide pipe (13) is installed on one side of the connecting pipe (14), a threaded rod (16) is connected to the interior of the material box (18), an adjusting nut (17) is installed on the outer side wall of one side of the material box (18), a sealing ball (19) is fixed on one side of the threaded rod (16), a sealing ring (15) is fixed on the outer side wall of one side of the sealing ball (19), and a temperature sensor (5) is installed on one side of the inner wall of the pre-expanding tank (1).

2. The EPS foam pre-expander according to claim 1, characterized in that: One side of the inclined material guide pipe (13) is in communication with the interior of the connecting pipe (14), and the other side of the inclined material guide pipe (13) is in communication with the interior of the pre-fermenting tank (1).

3. The EPS foam pre-expander according to claim 1, characterized in that: A threaded adjustment is formed between the threaded rod (16) and the adjusting nut (17), and an adhesive connection is formed between the sealing ring (15) and the sealing ball (19).

4. The EPS foam pre-expander according to claim 1, characterized in that: The diameter of the sealing ball (19) is adapted to the diameter of the inside of the connecting pipe (14), and a feeding port is installed on one side of the top of the material box (18).

5. The EPS foam pre-expander according to claim 1, characterized in that: A discharge port (10) is installed at the middle position of the bottom end of the pre-expanding tank (1), and feed ports (2) are installed on both sides of the top end of the pre-expanding tank (1). An arc-shaped mounting plate (20) is installed on the inner wall of the feed port (2), and a mounting ring (21) is connected to the top end of the arc-shaped mounting plate (20), and a filter screen (22) is fixed inside the mounting ring (21).

6. The EPS foam pre-expander according to claim 5, characterized in that: The top end of the discharge port (10) is connected to the interior of the pre-expanding tank (1), the feed port (2) is symmetrically distributed about the central axis of the pre-expanding tank (1), and the arc-shaped mounting plate (20) is symmetrically distributed about the central axis of the feed port (2).

7. The EPS foam pre-expander according to claim 1, characterized in that: A working motor (3) is installed at the middle position of the top of the pre-fermenting tank (1), the output end of the working motor (3) is connected to an output shaft (4), and stirring blades (8) are fixed at positions close to the bottom on both sides of the output shaft (4).

8. The EPS foam pre-expander according to claim 7, characterized in that: A connecting seat (11) is installed near the middle of both sides of the output shaft (4), a connecting rod (6) is installed inside the connecting seat (11), a scraper (7) is installed on one side of the connecting rod (6), and a connecting pin (23) is installed between the connecting rod (6) and the connecting seat (11).

Images