A vacuum exhaust system for a foam molding machine

Abstract

This utility model discloses a vacuum exhaust system for a foam molding machine. This system aims to solve the problem that existing molds generate gas during heating that cannot be exhausted, resulting in products that fail to meet the surface smoothness requirements of special products. The system includes a frame and loading / unloading stations, a transfer station, a heating station, and a cooling station mounted on the frame. The frame includes a mold mounting bracket and a shell fixedly connected to one side of the mold mounting bracket. The loading / unloading station is located at the front of the mold mounting bracket, the transfer station is located at the rear of the mold mounting bracket, and the cooling and heating stations are arranged sequentially from top to bottom on the mold mounting bracket. This utility model uses a graphene heating plate to heat the mold and closes the vacuum door. At this time, a vacuum pump, vacuum pipe, and vacuum valve are used to create a vacuum. Simultaneously, a PLC controls the hydraulic system cylinders to release pressure and exhaust gas, thereby effectively controlling the product defect rate and better meeting the surface smoothness requirements of special products.

Description

Technical Field

[0001] This utility model belongs to the technical field of foam molding machines, specifically relating to a vacuum exhaust system for a foam molding machine. Background Technology

[0002] Foam molding machines, as key equipment in modern industrial production, are widely used in many fields such as plastics, rubber, building materials, and packaging. With the rapid development of global manufacturing and the continuous improvement of consumers' requirements for product performance and quality, the role of foam molding machines in industrial production is becoming increasingly important. Through specific processes, they transform raw materials into foamed products with specific shapes and properties. These products, with their excellent characteristics such as lightweight, shock absorption, heat insulation, and cushioning, meet the diverse needs of different industries.

[0003] During the heating process, existing molds generate gas inside as the temperature rises. If the gas is not expelled, it will cause product defects. To solve this problem, vents are usually set at the top and bottom of the mold. However, the downside is that the vents will form burrs on the product surface, which cannot meet the smooth surface requirements of special products. Utility Model Content

[0004] (1) Technical problems to be solved In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a vacuum exhaust system for a foaming molding machine. This system aims to solve the problem that existing molds generate gas inside during the heating process, which cannot be exhausted, and the finished product cannot meet the surface smoothness requirements of special products.

[0005] (2) Technical solution To solve the above-mentioned technical problems, this utility model provides a vacuum exhaust system for a foaming molding machine. The system includes a frame and loading / unloading stations, transfer stations, heating stations, and cooling stations set on the frame. The frame includes a mold mounting frame and an outer shell fixedly connected to one side of the mold mounting frame. The loading / unloading station is located on the front side of the mold mounting frame, and the transfer station is located on the rear side of the mold mounting frame. The cooling station and heating station are arranged sequentially from top to bottom on the mold mounting frame. A heating plate is installed on the heating station. A vacuum pipe is fixedly connected to the side of the mold mounting frame, and a vacuum valve is installed on the vacuum pipe. A vacuum pump is installed at the bottom inner part of the outer shell, and the vacuum pump is connected to the vacuum pipe.

[0006] Preferably, the heating plate is a graphene heating plate.

[0007] Furthermore, a vacuum tank is installed at the top of the outer casing, and the vacuum pump is connected to the vacuum tube through the vacuum tank.

[0008] Furthermore, there are multiple vacuum tanks, and the vacuum pump is connected to multiple vacuum tanks through multiple branch pipes, with control electric valves installed on the branch pipes.

[0009] Furthermore, the mold mounting frame includes a base plate, a top plate, and two side plates fixedly connected between the base plate and the top plate, with a stabilizing plate fixedly connected to the side of each side plate that is far apart from the other.

[0010] Furthermore, the transfer station includes a transport frame, a drive gear mounted on the transport frame, and a rack fixedly connected to the stabilizing plate. The transport frame is slidably connected to the side plate. L-shaped connecting plates are fixedly connected to the lower surfaces of both ends of the transport frame. The other end of the L-shaped connecting plate extends to the front side of the stabilizing plate and is rotatably connected to a roller. The roller contacts the outer surface of the stabilizing plate.

[0011] Furthermore, guide rails are fixedly connected to the side of the two side plates that are close to each other, and sliders are fixedly connected to the left and right sides of the transport frame, with the sliders slidingly connected to the guide rails.

[0012] (3) Beneficial effects Compared with the prior art, the beneficial effects of this utility model are as follows: 1. In this utility model, after the mold enters the heating station, the graphene heating plate heats the mold and the vacuum door is closed. At this time, the vacuum is drawn by the vacuum pump, vacuum tube and vacuum valve. While the mold is in the graphene heating station, the PLC controls the hydraulic system cylinder to release pressure and exhaust air, thereby effectively controlling the product defect rate, such as unclear texture, lack of three-dimensionality, surface burrs and dents caused by poor exhaust, and better meeting the surface smoothness requirements of special products. 2. This utility model sets up a stabilizing plate and rollers between the frame and the transfer station. When the drive gear rotates, the transfer station is raised and lowered by the drive gear cooperating with the rack. At the same time, the rollers can roll along the stabilizing plate during the up and down movement of the transfer station, thereby providing auxiliary support for the transfer station and increasing the stability of the rack movement. Attached Figure Description

[0013] Figure 1 This is a frontal three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a rear-view three-dimensional structural diagram of the present invention.

[0015] Figure 3 This is the utility model Figure 2 A magnified structural diagram of point A in the middle.

[0016] Figure 4 This is the utility model Figure 2 A magnified structural diagram at point B in the middle.

[0017] The markings in the attached diagram are as follows: 1. Frame; 2. Loading / unloading station; 3. Transfer station; 4. Heating station; 5. Cooling station; 6. Vacuum tube; 7. Vacuum valve; 8. Vacuum tank; 101. Mold mounting frame; 102. Outer shell; 103. Side plate; 104. Stabilizing plate; 105. Guide rail; 106. Slider; 301. Transport frame; 302. Drive gear; 303. Rack; 304. L-shaped connecting plate; 305. Roller. Detailed Implementation

[0018] This specific embodiment is a vacuum exhaust system for a foaming molding machine, and its structural schematic diagram is shown below. Figures 1-4 As shown, the system includes a frame 1 and a loading / unloading station 2, a transfer station 3, a heating station 4, and a cooling station 5 mounted on the frame 1. The specific structures of the loading / unloading station 2, transfer station 3, heating station 4, and cooling station 5 on the frame 1 have been disclosed in application number 202410806570.3 and will not be described in detail here. The frame 1 includes a mold mounting frame 101 and a housing 102 fixedly connected to one side of the mold mounting frame 101. The loading / unloading station 2 is located on the front side of the mold mounting frame 101, the transfer station 3 is located on the rear side of the mold mounting frame 101, and the cooling station 5 and heating station 4 are arranged sequentially from top to bottom. A heating plate is installed on the heating station 4 of the mold mounting frame 101. A vacuum tube 6 is fixedly connected to the side of the mold mounting frame 101. The heating station 4 has a liftable vacuum chamber door. When vacuuming, this door will rise. This is existing technology and will not be described in detail here. Vacuuming is carried out through the vacuum tube 6. A vacuum valve 7 is installed on the vacuum tube 6. A vacuum pump is installed at the bottom of the inner shell 102. The vacuum pump is connected to the vacuum tube 6. A vacuum gauge is also installed on the vacuum tube 6 to observe the vacuum level. The vacuum gauge, vacuum pump and the foam molding machine are electrically connected to the PLC and can be controlled by time for vacuuming.

[0019] To achieve better heating, in this embodiment, the heating plate is a graphene heating plate. As a representative of new electrothermal materials, the core advantages of graphene heating plates lie in their high efficiency, energy saving, and rapid heating characteristics. By adding a reflective film to optimize the heat radiation distribution, the overall heating efficiency can be increased by 30%-50%, significantly reducing heat loss.

[0020] like Figure 1 and Figure 2 As shown: In this embodiment, a vacuum tank 8 is installed at the top of the outer shell 102, and the vacuum pump is connected to the vacuum tube 6 through the vacuum tank 8; in this way, when there is no need to evacuate, the vacuum pump will evacuate the vacuum tank 8 to a suitable vacuum level, and when evacuation is required, the vacuum tank 8 is connected to the vacuum tube 6. The large size of the vacuum tank 8 does not require the vacuum pump to be frequently started and stopped.

[0021] In order to vacuum multiple molds, such as Figure 1 and Figure 2 As shown: In this embodiment, there are multiple vacuum tanks 8, and the vacuum pump is connected to multiple vacuum tanks 8 through multiple branch pipes. The branch pipes are equipped with control electric valves. In this way, multiple foaming molding machines can be connected in parallel, and multiple vacuum tanks 8 are connected to multiple foaming molding machines through multiple branch pipes. The vacuum tanks 8 are evacuated sequentially by controlling the on and off of the vacuum tanks through the control electric valves.

[0022] like Figure 2 and Figure 3 As shown: In this embodiment, the mold mounting frame 101 includes a base plate, a top plate, and two side plates 103 fixedly connected between the base plate and the top plate. A stabilizing plate 104 is fixedly connected to the side of the two side plates 103 that are far apart. The transfer station 3 includes a transport frame 301, a drive gear 302 mounted on the transport frame 301, and a rack 303 fixedly connected to the stabilizing plate 104. The transport frame 301 is slidably connected to the side plates 103. L-shaped connecting plates 304 are fixedly connected to the lower surfaces of both the left and right ends of the transport frame 301. The other end of the L-shaped connecting plate 304 extends to the front side of the stabilizing plate 104 and is rotatably connected to a roller 305. The roller 305 contacts the outer surface of the stabilizing plate 104.

[0023] The drive gear 302 is connected to the drive component in the transfer station 3. When the drive gear 302 rotates, the transfer station 3 is raised and lowered by the drive gear 302 cooperating with the rack 303. At the same time, the transfer station 3 can make the roller 305 roll along the stabilizing plate 104 during the up and down movement, thereby providing auxiliary support for the transfer station 3 and increasing the stability of the rack movement.

[0024] To facilitate better sliding between the transport frame 301 and the side plate 103, such as Figure 2 and Figure 4 As shown: In this embodiment, guide rails 105 are fixedly connected to the side of the two side plates 103 that are close to each other, and sliders 106 are fixedly connected to the left and right sides of the transport frame 301. The sliders 106 are slidably connected to the guide rails 105.

[0025] Working principle: When the mold enters the heating station 4, the graphene heating plate heats the mold and closes the vacuum door. At this time, vacuuming is performed through the vacuum pump, vacuum tube 6 and vacuum valve 7. The vacuuming time can be selected (how many seconds to vacuum or how many seconds to stop before vacuuming). While the mold is in the graphene heating station 4, the PLC controls the hydraulic system cylinder to release pressure and exhaust air. The time is adjustable (multiple exhausts and exhaust time can be controlled), thereby effectively controlling the product defect rate, such as unclear texture, lack of three-dimensionality, surface burrs, and dents caused by poor exhaust, better meeting the surface smoothness requirements of special products.

[0026] All technical features in this embodiment can be freely combined according to actual needs.

[0027] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A vacuum exhaust system for a foaming molding machine, the system comprising a frame (1) and loading / unloading stations (2), a transfer station (3), a heating station (4), and a cooling station (5) disposed on the frame (1), characterized in that: The frame (1) includes a mold mounting frame (101) and a shell (102) fixedly connected to one side of the mold mounting frame (101). The loading and unloading station (2) is located on the front side of the mold mounting frame (101), and the transfer station (3) is located on the rear side of the mold mounting frame (101). The cooling station (5) and the heating station (4) are arranged sequentially from top to bottom on the mold mounting frame (101). A heating plate is installed on the heating station (4). A vacuum tube (6) is fixedly connected to the side of the mold mounting frame (101). A vacuum valve (7) is installed on the vacuum tube (6). A vacuum pump is installed at the bottom of the inner shell (102). The vacuum pump is connected to the vacuum tube (6).

2. The vacuum exhaust system of the foaming molding machine according to claim 1, characterized in that, The heating plate is a graphene heating plate.

3. The vacuum exhaust system of the foaming molding machine according to claim 2, characterized in that, A vacuum tank (8) is installed at the top of the outer shell (102), and the vacuum pump is connected to the vacuum tube (6) through the vacuum tank (8).

4. The vacuum exhaust system of the foaming molding machine according to claim 3, characterized in that, The number of vacuum tanks (8) is multiple, and the vacuum pump is connected to multiple vacuum tanks (8) through multiple branch pipes. The branch pipes are equipped with control electric valves.

5. The vacuum exhaust system of the foaming molding machine according to claim 4, characterized in that, The mold mounting frame (101) includes a bottom plate, a top plate, and two side plates (103) fixedly connected between the bottom plate and the top plate. A stabilizing plate (104) is fixedly connected to the side of the two side plates (103) that are far apart from each other.

6. The vacuum exhaust system of the foaming molding machine according to claim 5, characterized in that, The transfer station (3) includes a transport frame (301), a drive gear (302) mounted on the transport frame (301), and a rack (303) fixedly connected to the stabilizing plate (104). The transport frame (301) is slidably connected to the side plate (103). L-shaped connecting plates (304) are fixedly connected to the lower surfaces of both ends of the transport frame (301). The other end of the L-shaped connecting plate (304) extends to the front side of the stabilizing plate (104) and is rotatably connected to a roller (305). The roller (305) contacts the outer surface of the stabilizing plate (104).

7. The vacuum exhaust system of the foaming molding machine according to claim 6, characterized in that, The two side plates (103) are fixedly connected to a guide rail (105) on the side that is close to each other. The left and right sides of the transport frame (301) are fixedly connected to sliders (106), and the sliders (106) are slidably connected to the guide rails (105).

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