Open type foaming sandwich panel forming production line

Abstract

The application belongs to the technical field of foamed plate forming, and particularly relates to an open foaming sandwich plate forming production line, which comprises a frame, a foaming gun rack arranged at one end of the frame, a walking track arranged along the frame, a fixed heating plate rigidly connected to the top of the frame, a jacking mechanism arranged on the inner side of the walking track, a foaming mechanism and a vacuum mechanism. The open foaming can be realized by moving the heating plate on the walking track, the defects of the polyurethane sandwich plate, such as insufficient exhaust and easy bubble generation, are eliminated, the thickness of the foaming material at each position is easy to control, the uniformity after the plate forming is improved, and the quality of the polyurethane sandwich plate is greatly improved. Meanwhile, the production line can automatically complete the skin suction, mold feeding, pouring, mold closing, pressure maintaining and supplementing, mold opening and mold ejection through mechanical equipment and electrical equipment, the labor intensity of workers is greatly reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of foamed plate forming, and particularly relates to an open foaming sandwich plate forming production line. BACKGROUND

[0002] The polyurethane plate forming process is divided into high-temperature bonding composite forming and pouring foaming forming. Among them, the pouring forming process generally adopts a closed mold pouring process. The closed mold pouring process is to pre-assemble the mold strip, upper and lower panels to form a mold cavity, and then pour foaming material into the mold cavity in sequence after the main machine is closed, and then the foaming material is cured and formed. Although this process technology is relatively mature, the production efficiency is also relatively high, but the exhaust is not sufficient, and air bubbles are easily left in the polyurethane composite plate, thereby affecting the strength and thermal insulation performance of the polyurethane composite plate. SUMMARY

[0003] The technical problem to be solved by the present application is to provide an open foaming sandwich plate forming production line, which adopts an open foaming forming process to make the exhaust sufficient and air bubbles not easily left in the polyurethane composite plate.

[0004] To achieve the above purpose, the present application provides an open foaming sandwich plate forming production line, which comprises:

[0005] a frame;

[0006] a foaming gun rack arranged at one end of the frame, wherein a plurality of foaming guns capable of vertical and horizontal movement are arranged on the foaming gun rack;

[0007] a walking track arranged along the frame, wherein a movable heating plate and an auxiliary moving table are arranged on the walking track;

[0008] a fixed heating plate rigidly connected to the top of the frame, wherein the movable heating plate can move to the lower side of the fixed heating plate along the walking track;

[0009] a jacking mechanism located on the inner side of the walking track, which is used to jack up the movable heating plate and the auxiliary moving table to complete the mold closing;

[0010] a foaming mechanism, which is used to supply foaming material to the foaming gun; and

[0011] a vacuum mechanism, which is used to adsorb the upper skin.

[0012] Optionally, the foaming gun rack comprises a lifting adjusting mechanism and a truss, the height of the truss can be adjusted through the lifting adjusting mechanism, and the foaming gun can move along the truss.

[0013] Optionally, the lifting adjusting mechanism comprises a motor, a lead screw and a guide column, the lead screw is screwed with the truss, and the guide column is slidingly connected with the truss.

[0014] Optionally, a drive motor is provided on the truss, and the foam gun is rigidly connected to the drive motor.

[0015] Optionally, the traveling track includes an outer track and an inner track arranged parallel to each other, and the movable heating plate includes a lower movable heating plate and an upper movable heating plate, which move along the inner track and the outer track, respectively.

[0016] Optionally, the lower movable heating plate is provided with a second drive motor and a traveling wheel on its support leg. The second drive motor is driven and connected to the traveling wheel, and the traveling wheel rolls along the traveling track.

[0017] Optionally, the traveling wheel includes a cam and a coaxially connected gear, the traveling track includes a linear track and a rack, the gear meshes with the rack, and the traveling wheel rolls along the linear track.

[0018] Optionally, the height of the auxiliary moving platform is the same as that of the lower moving heating plate.

[0019] Optionally, the open-type foamed sandwich panel forming production line also includes a platform frame, on which the foaming mechanism and vacuum mechanism are mounted, and the platform frame spans the frame.

[0020] Optionally, the vacuum mechanism includes multiple vacuum suction cups, each of which is disposed through a fixed heating plate.

[0021] The beneficial effects of this invention are as follows: The open-type foamed sandwich panel molding production line provided by this invention, through the movement of a heating plate on a traveling track, allows for simultaneous mold feeding and injection of foam, eliminating the defects of insufficient venting and easy bubble formation in polyurethane sandwich panels. Furthermore, the thickness of the foamed material in each part is easily controlled, which helps improve the uniformity of the molded panels and greatly enhances the quality of the polyurethane sandwich panels. Simultaneously, the entire process of this production line—from attaching the skin, feeding into the mold, injection, mold closing, pressure holding and replenishment, mold opening, and mold ejection—can be automatically completed by mechanical and electrical equipment, significantly reducing the labor intensity of workers and improving production efficiency. The polyurethane sandwich panels produced by this production line can be used for refrigerated truck body panels, military and medical mobile cabin wall panels. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the open-type foamed sandwich panel molding production line provided in an embodiment of the present invention;

[0023] Figure 2 Provided for embodiments of the present invention Figure 1 Enlarged view of area A in the image;

[0024] Figure 3 Provided for embodiments of the present invention Figure 1 Enlarged view of area B in the image;

[0025] Figure 4 This is a front view of a laminator provided in an embodiment of the present invention;

[0026] Figure 5 A side view of a laminator provided in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the installation structure of the vacuum suction cup provided in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram illustrating the working principle of the foaming mechanism provided in an embodiment of the present invention.

[0029] In the diagram: 101, Frame; 102, Foaming Gun Holder; 1021, Lifting and Adjustment Mechanism; 1022, Truss; 1023, Drive Motor 1; 103, Foaming Gun; 104, Traveling Track; 1041, Outer Track; 1042, Inner Track; 105, Lower Moving Heating Plate; 1051, Drive Motor 2; 1052, Traveling Wheel; 106, Upper Moving Heating Plate; 107, Fixed Heating Plate; 108, Auxiliary Moving Platform; 1081, Drive Motor 3; 109, Lifting Mechanism; 1110, Vacuum Suction Cup; 201, Platform Frame; 202, Foaming Mechanism; 203, Vacuum Mechanism; 2011, POL Raw Material Storage Tank; 2022, ISO Raw Material Storage Tank; 2023, POL Metering System; 2024, SO Metering System; 2025, High and Low Pressure Switching Valve; 2026, Hydraulic System. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0031] like Figures 1-6 As shown, this invention provides an open-type foamed sandwich panel molding production line, mainly used for the production of refrigerated truck body panels, military and medical mobile cabin wall panels. It includes: a frame 101, a foaming gun holder 102 disposed at one end of the frame 101, a traveling track 104 disposed along the frame 101, a fixed heating plate 107 rigidly connected to the top of the frame 101, a lifting mechanism 109 located inside the traveling track 104, a foaming mechanism 202, and a vacuum mechanism 203. The foaming gun holder 102 is equipped with several foaming guns 103 that can move vertically and horizontally; a movable heating plate and an auxiliary moving platform are disposed on the traveling track 104; the movable heating plate and the auxiliary moving platform 108 can move along the traveling track 104 to below the fixed heating plate 107; the lifting mechanism 109 is used to lift the movable heating plate and the auxiliary moving platform to complete mold closing; the foaming mechanism 202 is used to supply foaming material to the foaming guns 103; and the vacuum mechanism 203 is used to adsorb the upper skin.

[0032] It should be noted that the frame 101 is formed by multiple rectangular frames arranged in sequence and connected by connecting rods. The rectangular frames can be made of steel. The frame 101 is fixed to the ground, and the traveling track 104 and the lifting mechanism 109 are fixed to the inner bottom of the frame 101.

[0033] It is also understood that in other embodiments, the frame 101 may also be a channel-type steel frame structure, with the walking track 104 and the lifting mechanism 109 located inside the frame 101, and the bottom of the walking track 104 and the lifting mechanism 109 supported on the bottom surface. Alternatively, the walking track 104 and the lifting mechanism 109 may be fixed to the inner side of the frame 101 and close to the bottom surface.

[0034] In use, the fixed heating plate 107, the movable heating plate, and the auxiliary moving platform 108 can be preheated to the working temperature. An upper skin is pre-installed on the auxiliary moving platform 108, and a lower skin and surrounding mold strips are pre-installed on the movable heating plate. The auxiliary moving platform 108, with the upper skin pre-installed, opens into the frame 101. The lifting mechanism 109 lifts the auxiliary moving platform 108 upwards to close the mold. After contacting the fixed heating plate 107, the vacuum mechanism 203 holds the upper skin, and the lifting mechanism 109 drives the auxiliary moving platform 108 downwards to open the mold and fall onto the track. The auxiliary moving platform 108 then exits the traveling track 104 within the frame 101. The pre-installed movable heating plate... The hot plate moves into the frame 101 to the designated position, opening the mold. At the same time, the foaming mechanism 202 pours foaming material into the mold cavity while moving and pouring. The moving speed of the hot plate matches the pouring speed of the foaming gun 103. When the position is reached, the pouring stops and the mold entry stops. The lifting mechanism 109 lifts the hot plate upward to close the mold, stopping when it reaches the position. The curing program is started, and the equipment automatically maintains and replenishes pressure. At the same time, the pre-loading of the next product can be carried out. After curing is completed, the equipment can provide an alarm. The lifting mechanism 109 moves downward to open the mold, stopping when it reaches the position. Finally, the hot plate is opened out of the frame 101, and the molded product is unloaded.

[0035] Compared with existing technologies, the open-type foamed sandwich panel molding production line provided in this invention uses a moving heating plate on a traveling track 104 to achieve simultaneous mold feeding and injection, eliminating the defects of insufficient venting and bubble formation in polyurethane sandwich panels. Furthermore, the thickness of the foamed material in each part is easily controlled, which helps improve the uniformity of the molded panels and greatly enhances the quality of the polyurethane sandwich panels. Simultaneously, the entire process of this production line—from attaching the skin to the mold, mold feeding, injection, mold closing, pressure holding and replenishment, mold opening, and mold ejection—can be automatically completed by mechanical and electrical equipment, significantly reducing the labor intensity of workers and improving production efficiency. The polyurethane sandwich panels produced by this production line can be used for refrigerated truck body panels, military and medical mobile cabin wall panels.

[0036] In this embodiment, the foam gun holder 102 includes a lifting adjustment mechanism 1021 and a truss 1022. The height of the truss 1022 can be adjusted by the lifting adjustment mechanism 1021, and the foam gun 103 can move along the truss 1022. The lifting mechanism is divided into two symmetrical parts, which are located at both ends of the truss 1022 respectively. The distance between the foam gun 103 and the moving heating plate can be adjusted by the lifting mechanism so that the foam gun 103 is at the optimal height. By moving the foam gun 103 along the truss 1022, a lateral reciprocating motion is achieved, so that the foaming material is evenly sprayed onto the upper skin. The number of foam guns 103 can be set as needed. For the production of commonly used polyurethane sandwich panels, four foam guns 103 are preferred. The four foam guns 103 can move laterally reciprocating synchronously or individually.

[0037] In one embodiment, the lifting adjustment mechanism 1021 includes a motor, a lead screw, and a guide column. The lead screw is screwed to the truss 1022, and the guide column is slidably connected to the truss 1022. The motor drives the lead screw, causing the axial reciprocating motion of the guide column of the truss 1022, thereby realizing the up-and-down reciprocating motion of the foam gun 103 connected on the truss 1022. In other embodiments, the lifting adjustment mechanism 1021 may also adopt a combination of an electric cylinder or a hydraulic cylinder and a guide column. The linear motion end of the electric cylinder or hydraulic cylinder is rigidly connected to the truss 1022, thereby driving the truss 1022 to reciprocate along the guide column axis.

[0038] In addition, a drive motor 1023 is provided on the truss 1022. The foam gun 103 is rigidly connected to the drive motor 1023. The drive motor 1023 drives the gears connected to it to reciprocate on the truss 1022, thereby driving the foam gun 103 to reciprocate laterally, so that the foam gun 103 can be poured from one side of the lower skin to the other.

[0039] In one embodiment, the traveling track 104 includes an outer track 1041 and an inner track 1042 arranged parallel to each other. The movable heating plate includes a lower movable heating plate 105 and an upper movable heating plate 106. The lower movable heating plate 105 and the upper movable heating plate 106 move along the inner track 1042 and the outer track 1041, respectively. The lower movable heating plate 105 and the upper movable heating plate 106 need to be matched in height. The lower movable heating plate 105 and the upper movable heating plate 106 can be equipped with upper and lower skins and surrounding mold strips, respectively. When the lower movable heating plate 105 or the upper movable heating plate 106 moves into the frame 101 for subsequent production, after the production of one polyurethane sandwich panel is completed, the subsequent movable heating plate can immediately enter the production operation position. After the previous movable heating plate is unloaded, the upper and lower skins and surrounding mold strips can be installed again to prepare. This process is repeated, which can greatly improve production efficiency.

[0040] Specifically, the lower movable heating plate 105 is provided with a second drive motor 1051 and a traveling wheel 1052 on its support leg. The second drive motor 1051 is connected to the traveling wheel 1052 for driving. The traveling wheel 1052 rolls along the traveling track 104. The structure of the upper movable heating plate 106 and the auxiliary moving platform 108 is similar to that of the lower movable heating plate 105. The support leg of the auxiliary moving platform 108 is provided with a third drive motor 1081 and a corresponding traveling wheel 1052.

[0041] Furthermore, the traveling wheel 1052 consists of gears and cams, and the traveling track 104 consists of a linear track and a rack. The gears of the traveling wheel 1052 mesh with the rack of the traveling track 104, driving the traveling wheel to move on the linear track. In this way, the movable heating plate and the auxiliary moving table 108 can be stably kept in the designated position and are not easily moved by external forces. This prevents the skin from moving during production, which is beneficial to improving product quality. In contrast, ordinary smooth tracks and wheels, even with brakes, will still move slightly under external forces.

[0042] The open-type foamed sandwich panel molding production line also includes a platform frame 201. The foaming mechanism 202 and the vacuum mechanism 203 are installed on the top of the platform frame 201. The platform frame 201 spans the frame 101. In this way, the foaming mechanism 202 and the vacuum mechanism 203 are located above the frame 101, which allows the foaming mechanism 202 and the vacuum mechanism 203 to be closer to the production operation position, which can shorten the length of various pipelines and reduce the floor space of the production line.

[0043] Please refer to Figure 7 The foaming mechanism 202 includes: a POL raw material storage tank 2021, an ISO raw material storage tank 2022, a POL metering system 2023, an ISO metering system 2024, a high-low pressure switching valve 2025, a hydraulic system 2026, and corresponding electrical control components. The output pipe of the POL raw material storage tank 2021 is connected to the POL metering system 2023. The POL metering system 2023 is connected to the foaming gun 103 via a feed pipe. The foaming gun 103 is connected to the return pipe of the POL raw material storage tank 2021. A high-low pressure switching valve 2025 is installed between the feed pipe and the return pipe. Opening this valve allows for low-pressure circulation, while closing it allows for high-pressure circulation or injection of foaming material. Similarly, the output pipe of the ISO raw material storage tank 2022 is connected to the ISO metering system 2024. The metering system 2024 is connected to the foaming gun 103 via the feed pipe. The side circuit of the foaming gun 103 is connected to the return pipe of the ISO raw material storage tank 2022. A high-low pressure switching valve 2025 is installed between the feed pipe and the return pipe. When this valve is opened, low-pressure circulation is performed. When this valve is closed, high-pressure circulation or foaming material is injected. The hydraulic system 2026 is connected to the hydraulic port of the foaming gun 103 to control the opening (injection) and closing of the foaming gun 103. The four systems are connected in parallel as described above to form a four-machine, four-gun foaming mechanism 202.

[0044] In this embodiment, please refer to Figure 6 The vacuum mechanism 203 includes multiple vacuum suction cups 110, each of which is disposed through the fixed heating plate 107. Typically, hundreds of holes are evenly distributed on the fixed heating plate 107 for mounting the vacuum suction cups 110. Other components of the vacuum mechanism 203 are existing technologies and therefore will not be described in detail.

[0045] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0046] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. An open-type foamed sandwich panel molding production line, characterized in that, include: Frame (101); A foam gun holder (102) is provided at one end of the frame (101), and a plurality of foam guns (103) that can move vertically and horizontally are provided on the foam gun holder (102). A walking track (104) is provided along the frame (101), and a movable heating plate and an auxiliary moving platform (108) are provided on the walking track (104). A fixed heating plate (107) is rigidly connected to the top of the frame (101), and the movable heating plate and the auxiliary moving platform (108) can move along the walking track (104) to below the fixed heating plate (107); The lifting mechanism (109) located inside the walking track (104) is used to lift the moving heating plate and the auxiliary moving table (108) to complete the mold closing; Foaming mechanism (202), said foaming mechanism (202) for supplying foaming material to foaming gun (103); and Vacuum mechanism (203), said vacuum mechanism (203) is used to adsorb the upper skin; The walking track (104) includes an outer track (1041) and an inner track (1042) arranged parallel to each other. The movable heating plate includes a lower movable heating plate (105) and an upper movable heating plate (106). The lower movable heating plate (105) and the upper movable heating plate (106) move along the inner track (1042) and the outer track (1041) respectively. The lower movable heating plate (105) and the upper movable heating plate (106) are respectively equipped with upper and lower skins and four surrounding molding strips.

2. The open-type foamed sandwich panel forming production line according to claim 1, characterized in that, The foam gun holder (102) includes a lifting adjustment mechanism (1021) and a truss (1022). The height of the truss (1022) can be adjusted by the lifting adjustment mechanism (1021), and the foam gun (103) can move horizontally along the truss (1022).

3. The open-type foamed sandwich panel forming production line according to claim 2, characterized in that, The lifting and adjusting mechanism (1021) includes a motor, a lead screw and a guide column. The lead screw is screwed to the truss (1022) and the guide column is slidably connected to the truss (1022).

4. The open-type foamed sandwich panel forming production line according to claim 3, characterized in that, A drive motor (1023) is provided on the truss (1022), and the foam gun (103) is rigidly connected to the drive motor (1023).

5. The open-type foamed sandwich panel forming production line according to claim 1, characterized in that, The lower movable heating plate (105) is provided with a second drive motor (1051) and a walking wheel (1052) on its support leg. The second drive motor (1051) is connected to the walking wheel (1052) in a drive connection. The walking wheel (1052) rolls along the walking track (104).

6. The open-type foamed sandwich panel forming production line according to claim 5, characterized in that, The traveling wheel (1052) includes a cam and a coaxially connected gear, and the traveling track (104) includes a linear track and a rack, the gear meshing with the rack, and the traveling wheel rolling along the linear track.

7. The open-type foamed sandwich panel forming production line according to claim 1, characterized in that, The height of the auxiliary moving platform is the same as that of the lower moving heating plate.

8. The open-type foamed sandwich panel forming production line according to any one of claims 1-7, characterized in that, It also includes a platform frame (201), on top of which the foaming mechanism (202) and vacuum mechanism (203) are mounted, the platform frame (201) spanning the frame (101).

9. The open-type foamed sandwich panel forming production line according to claim 8, characterized in that, The vacuum mechanism (203) includes multiple vacuum suction cups (110), each of which is disposed through a fixed heating plate (107).

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