A refrigerated truck curved panel manufacturing equipment and manufacturing process

Abstract

The present invention discloses a device and a manufacturing process for a curved compartment panel of a refrigerated truck, comprising a lower mold and an upper mold, wherein the upper table surface of the lower mold is configured as a first curved portion; the lower table surface of the upper mold is configured as a second curved portion adapted to the first curved portion, a workpiece is placed on the first curved portion, one end of the workpiece is abutted against a positioning plate, the positioning plates are spaced along the side surface of the lower mold, and the bottom end of the positioning plate is connected to the side surface of the lower mold by rotation; a guide plate is provided on the positioning plate, and when the positioning plate abuts against one side of the workpiece, the guide plate is tilted upward away from one end of the positioning plate. The present invention can produce curved left and right curved compartment panels of a refrigerated truck through room temperature pressing of the mold, thereby providing a more suitable manufacturing process technology for the production of left and right curved compartment panels of the refrigerated truck; and compared with the hot pressing method, the room temperature pressing of the present invention can effectively reduce energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerated trucks, and in particular to a device and a process for manufacturing a curved compartment plate of a refrigerated truck. Background Art

[0002] With the development of society, living standards are constantly improving, and people's diet, food transportation and storage conditions are constantly improving and improving. With the development of land transportation at home and abroad, it has created a good development environment for the food transportation industry and the refrigerated truck manufacturing industry.

[0003] In order to improve the volume utilization rate of refrigerated trucks in the passenger car series, the left and right curved panels can be used instead of the left and right straight panels. On the one hand, the panels have a beautiful arc curve, and on the other hand, the volume ratio can be increased by about 5%. However, in the existing refrigerated truck manufacturing process, in order to reduce the manufacturing cost of the panels, the panels are mostly manufactured using a hot pressing process, which places the workpiece on the lower inlet of the hot press and transports it to the hot press for hot pressing. For the hot pressing of the curved panels, the lower inlet of the hot press needs to be converted into a curved panel, and the workpiece is placed on the curved panel, which will easily shift during transportation, making the hot pressing process difficult to apply to curved panels. In addition, the hot pressing process has high energy consumption, resulting in high manufacturing costs for the panels. Summary of the Invention

[0004] The purpose of the present invention is to improve and innovate the shortcomings and problems existing in the background technology, and to provide a refrigerated truck curved panel manufacturing equipment and manufacturing process.

[0005] According to a first aspect of the present invention, there is provided a device for manufacturing curved compartment panels for refrigerated trucks, comprising a lower die and an upper die, wherein the upper table surface of the lower die is configured as a first curved portion; the lower table surface of the upper die is configured as a second curved portion adapted to the first curved portion, a workpiece is placed on the first curved portion, one end of the workpiece is abutted against a positioning plate, the positioning plates are spaced apart along the side surface of the lower die, and the bottom end of the positioning plate is rotatably connected to the side surface of the lower die through a hinge; a guide plate is provided on the positioning plate, and when the positioning plate abuts against one side of the workpiece, the guide plate is tilted upward away from one end of the positioning plate.

[0006] A further solution is that the upper die moves up and down under the drive of an oil press, a hydraulic cylinder or a crane.

[0007] A further solution is that a support mechanism is provided on the side of the lower mold away from the positioning plate, and the support mechanism is used to support one end of the workpiece away from the positioning plate. The support mechanism includes a support rod, and the top end of the support rod is used to support one end of the workpiece away from the positioning plate. The bottom end of the support rod slides with the lower mold and extends into the slide groove. The slide groove is opened on the lower mold, and a spring is installed on the bottom wall of the slide groove. The upper end of the spring is used to connect with the bottom end of the support rod.

[0008] A further solution is that several support rods are arranged at intervals along the side of the lower mold, and the bottom ends of the support rods are fixedly connected to a slide, and the slide slide is slidably matched with the slide groove. A groove is also provided on the lower mold, and the groove and the slide groove are connected to each other. The top wall of the groove is fixedly connected to an electric push rod, and the telescopic end of the electric push rod is against the upper surface of the slide.

[0009] A further solution is that a plurality of the support mechanisms are provided along the front and back sides of the lower mold.

[0010] According to a second aspect of the present invention, a process for manufacturing a curved compartment panel for a refrigerated truck using the above-mentioned manufacturing equipment is provided, which specifically comprises the following steps:

[0011] Separate the upper mold and the lower mold;

[0012] Rotate the positioning plate onto the upper table of the lower mold;

[0013] Lay the lower ground film on the upper surface of the lower mold;

[0014] Laying the first skin on the lower ground membrane, wherein one end of the first skin abuts against the positioning plate;

[0015] Sprinkle a layer of liquid glue on the upper surface of the first skin to form a first glue layer;

[0016] Laying the insulation layer on the first glue layer;

[0017] Sprinkle a layer of liquid glue on the upper surface of the insulation layer to form a second glue layer;

[0018] Laying the second skin on the second glue layer;

[0019] Laying the upper ground membrane on the second skin;

[0020] The upper mold and the lower mold are closed; during the closing process, the upper mold acts on the guide plate to drive the positioning plate to automatically rotate downward;

[0021] Lock the upper and lower molds and press for the preset time;

[0022] Open the mold and take out the pressed workpiece.

[0023] A further solution is that after the step of rotating the positioning plate onto the upper table surface of the lower mold, the following steps are further included:

[0024] Control the extension and retraction of the electric push rod to adjust the height of the top of the support rod to match the height of the end of the lower mold close to the positioning plate;

[0025] Lay the lower ground film on the upper surface of the lower mold and the support rods.

[0026] A further solution is that the step of combining the upper mold and the lower mold comprises:

[0027] The upper die drives the end of the workpiece away from the positioning plate to move downward and squeeze the support rod to gradually retract into the slide groove; at the same time, the upper die and the support rod clamp the end of the workpiece away from the positioning plate.

[0028] A further solution is that after the step of opening the mold and taking out the pressed workpiece, the following steps are further included:

[0029] The molded compartment panels are trimmed and de-glued.

[0030] A further solution is that the first skin and the second skin are made of any one of stainless steel, fiberglass, and aluminum; and the insulation layer is made of one of extruded polystyrene foam board and polyurethane.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention provides a manufacturing device and a manufacturing process for a curved compartment panel of a refrigerated truck, which can manufacture curved left and right curved compartment panels of a refrigerated truck by pressing the mold at room temperature, thereby providing a more suitable manufacturing process for the left and right curved compartment panels of the refrigerated truck; and compared with the hot pressing method, the room temperature pressing of the present invention can effectively reduce energy consumption;

[0032] (2) After the positioning plate of the present invention is rotated onto the upper table of the lower die, it can conveniently play a positioning role; and during the mold closing process, the positioning plate can be driven to automatically rotate downward and separate from the upper table of the lower die by relying on the downward stroke of the upper die, so that the workpiece after drawing will not interfere with the positioning plate; that is, the positioning plate can play a positioning role without affecting the pressing and forming of the workpiece;

[0033] (3) The present invention utilizes the telescopic function of the electric push rod to adjust the extension length of the top of the support rod relative to the lower die. In this way, on the one hand, the height of the top of the support rod can be matched with the height of the other end of the upper table of the lower die, thereby providing convenient support conditions for the workpiece. On the other hand, when multiple support mechanisms are provided on the front and rear sides of the lower die, only the support mechanisms that are adapted to the size of the workpiece can support the workpiece, while the support mechanisms at the remaining positions are retracted into the lower die.

[0034] (4) During the mold closing process, the upper mold can gradually squeeze the support rod back into the slide groove, so that the support rod will not hinder the workpiece from being pressed into the left curved box plate or the right curved box plate; at the same time, the upper mold and the support rod can clamp the end of the workpiece away from the positioning plate, so that the workpiece will not slide down along the lower mold during the mold closing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1A schematic diagram of the front structure of a refrigerated truck curved panel manufacturing device provided by the first embodiment of the present invention Figure 1 ;

[0036] Figure 2 A schematic diagram of the front structure of a refrigerated truck curved panel manufacturing device provided by the first embodiment of the present invention Figure 2 ;

[0037] Figure 3 The first embodiment of the present invention provides Figure 2 Schematic diagram of a local enlarged structure;

[0038] Figure 4 A schematic diagram of the cross-sectional structure of the lower mold provided by the first embodiment of the present invention;

[0039] Figure 5 This is a schematic side structural diagram of a refrigerated truck curved compartment panel manufacturing device provided by the first embodiment of the present invention.

[0040] Figure numerals: 1, base; 2, lower mold; 201, first arc-shaped portion; 3, upper mold; 301, second arc-shaped portion; 4, slide; 5, top seat; 6, hydraulic press; 7, support column; 8, workpiece; 801, lower ground film; 802, first skin; 803, first glue coating; 804, thermal insulation layer; 805, second glue coating; 806, second skin; 807, upper ground film; 9, positioning plate; 10, guide plate; 11, support mechanism; 111, slide groove; 112, slide plate; 113, support rod; 114, spring; 115, groove; 116, electric push rod. DETAILED DESCRIPTION

[0041] In order to make the objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] Example 1

[0044] See also Figure 1-Figure 5The present invention provides a device for manufacturing curved compartment panels for refrigerated trucks, comprising a lower die 2 and an upper die 3. The upper surface of the lower die 2 is configured as a first curved portion 201; the lower surface of the upper die 3 is configured as a second curved portion 301 that matches the first curved portion 201. A plurality of positioning plates 9 are provided at intervals on the side surface of the lower die 2. Specifically, the positioning plate 9 is a right-angled plate, one end of which is rotatably connected to the side surface of the lower die 2 via a hinge, and the hinge is provided on the side surface of the lower die 2. When the positioning plate 9 is rotated upward, the other end of the positioning plate 9 will rotate to the upper surface of the lower die 2, at which point the positioning plate 9 can play a positioning role. When the workpiece 8 is placed on the lower die 2, one end of the workpiece 8 will abut against the positioning plate 9, thereby determining the relative position of the workpiece 8 to the lower die 2 and the upper die 3, and playing a positioning role for the workpiece 8. A guide plate 10 is provided on the positioning plate 9. When the positioning plate 9 abuts against one side of the workpiece 8, the guide plate 10 is tilted upward away from the end of the positioning plate 9.

[0045] It should be noted that when the other end of the positioning plate 9 rotates to the upper table of the lower mold 2, the positioning plate 9 can conveniently play a positioning role; during the mold closing process, the lower mold 2 and the upper mold 3 cooperate with each other to press the workpiece 8. At this time, the upper mold 3 moving downward will squeeze the guide plate 10, thereby driving the positioning plate 9 to automatically rotate downward and separate from the upper table of the lower mold 2, so that the drawn workpiece 8 will not interfere with the positioning plate 9, that is, the positioning plate 9 can play a positioning role without affecting the pressing and forming of the workpiece 8.

[0046] Before placing the workpiece 8 on the upper surface of the lower die 2, the upper die 3 and lower die 2 must be separated. The upper die 3 can be moved closer to or further away from the lower die 2 by a hydraulic press 6, a hydraulic cylinder, or a crane. For crane lifting, no auxiliary equipment is required; simply hook the crane's hook onto the upper die 3 to lift or lower it. For the hydraulic press 6 or hydraulic cylinder, the output port must be connected to the upper die 3.

[0047] like Figure 1 、 Figure 2 and Figure 5 As shown, in some embodiments, a hydraulic press 6 is mounted on a top seat 5, and the upper mold 3 is mounted on a slide 4. The output end of the hydraulic press 6 is fixedly connected to the slide 4. The top seat 5 is connected to the base 1 via a support column 7, and the slide 4 and the support column 7 slide together, with the support column 7 acting as a guide. With this arrangement, the hydraulic press 6 can drive the upper mold 3 to move up and down. When the upper mold 3 moves upward, the mold can be opened, facilitating the placement of the workpiece 8 on the lower mold 2; when the upper mold 3 moves downward, the mold can be closed, facilitating the pressing and forming of the workpiece 8.

[0048] The workpiece 8 comprises, arranged from bottom to top, a lower film 801, a first covering 802, a first adhesive layer 803, an insulating layer 804, a second adhesive layer 805, a second covering 806, and an upper film 807. The first and second coverings 802 and 806 can be made of stainless steel, fiberglass, or aluminum; the insulating layer 804 can be made of extruded polystyrene foam or polyurethane. The lower and upper films 801 and 807 prevent excess adhesive from sticking to the lower mold 2 or upper mold 3. After the workpiece 8 is formed, the lower and upper films 801 and 807 can be removed.

[0049] It should be noted that the first arc-shaped portion 201 corresponding to the lower mold 2 and the second arc-shaped portion 301 corresponding to the upper mold 3 correspond to the curvature of the left and right arc-shaped compartment plates of the manufactured refrigerated truck. For the left and right arc-shaped compartment plates with smaller curvatures, after the workpiece 8 is placed on the lower mold 2, the workpiece 8 will not slide down along the lower mold 2; while for the left and right arc-shaped compartment plates with larger curvatures, the workpiece 8 may slide down along the lower mold 2. Therefore, in this embodiment, a support mechanism 11 is provided on the side of the lower mold 2 away from the positioning plate 9. The support mechanism 11 is used to support the lower surface of one end of the workpiece 8 away from the positioning plate 9. Specifically, the support mechanism 11 includes a support rod 113, the top end of the support rod 113 is used to support the lower surface of one end of the workpiece 8 away from the positioning plate 9, and the top end of the support rod 113 is an arc surface adapted to the first arc-shaped portion 201. The bottom end of the support rod 113 slides with the lower die 2 and extends into the chute 111. The chute 111 is provided on the lower die 2. A spring 114 is installed on the bottom wall of the chute 111. The upper end of the spring 114 is used to connect with the bottom end of the support rod 113. When the workpiece 8 is placed on the upper table of the lower die 2, one end of the workpiece 8 abuts against the positioning plate 9, and the other end of the workpiece 8 is placed on the support rod 113. In this way, the workpiece 8 will not slide down. Moreover, during the mold closing process, the upper die 3 drives the end of the workpiece 8 away from the positioning plate 9 to move downward, which will drive the end of the workpiece 8 close to the positioning plate 9 to tilt upward. The support rod 113 can also be gradually squeezed back into the chute 111. The support rod 113 will not hinder the workpiece 8 from being pressed into the left or right curved box plate. At the same time, the upper die 3 and the support rod 113 can clamp the end of the workpiece 8 away from the positioning plate 9, so that the workpiece 8 will not slide down along the lower die 2 during the mold closing process.

[0050] In some preferred embodiments, a plurality of support rods 113 are spaced apart along the side of the lower mold 2. The bottom ends of the plurality of support rods 113 are fixedly connected to slide plates 112, which slidably engage with the chute 111. A groove 115 is also formed on the lower mold 2, communicating with the chute 111. An electric push rod 116 is fixedly connected to the top wall of the groove 115, the telescopic end of which abuts against the upper surface of the slide plates 112. By retracting and retracting the electric push rod 116, the extension of the top end of the support rod 113 relative to the lower mold 2 can be adjusted so that the height of the top end of the support rod 113 is aligned with the height of the upper surface of the lower mold 2 near the positioning plate 9.

[0051] In some preferred embodiments, multiple support mechanisms 11 are provided along the front and rear surfaces of the lower die 2. For workpieces 8 of varying sizes, support mechanisms 11 at different locations can be used to support the lower surface of the workpiece 8, thereby adapting to workpieces of varying sizes. Furthermore, by retracting and extending the electric push rod 116, the top end of the support rod 113 can be retracted in advance to a position flush with the upper surface of the lower die 2, so that only the support mechanism 11 located at the end of the workpiece 8 away from the positioning plate 9 supports the positioning plate 9, while the support mechanisms 11 at other locations are retracted into the lower die 2.

[0052] In summary, the present invention provides a device for manufacturing curved compartment panels for refrigerated trucks. By pressing a mold at room temperature, curved left and right curved compartment panels for refrigerated trucks can be manufactured, thereby providing a more suitable manufacturing process technology for the left and right curved compartment panels of refrigerated trucks. Moreover, compared with the hot pressing method, the room temperature pressing of the present invention can effectively reduce energy consumption.

[0053] Example 2

[0054] The present invention also provides a process for manufacturing a curved compartment panel for a refrigerated truck using the manufacturing equipment described in Example 1, which specifically includes the following steps:

[0055] Step 101, mold opening: separating the upper mold 3 and the lower mold 2.

[0056] Step 102 , setting the positioning plates 9 : rotating the multiple positioning plates 9 on the side surface of the lower mold 2 onto the upper surface of the lower mold 2 .

[0057] Step 103 , laying the lower ground film 801 : laying the lower ground film 801 on the upper surface of the lower mold 2 ; the lower ground film 801 can prevent the overflowed liquid from adhering to the lower mold 2 during the pressing process.

[0058] Step 104, laying the first skin 802: Lay the first skin 802 on the lower ground membrane 801, wherein one end of the first skin 802 is against the positioning plate 9; the first skin 802 can be made of stainless steel, fiberglass or aluminum, and the size of the first skin 802 is smaller than the lower ground membrane 801.

[0059] Step 105, lower glue spraying: spray a layer of liquid glue on the upper surface of the first skin 802 to form a first glue spraying layer 803;

[0060] Step 106: Lay the insulation layer 804: Lay the insulation layer 804 on the first adhesive layer 803, ensuring that the edge of the insulation layer 804 is flush with the edge of the first skin 802. The insulation layer 804 can be made of extruded polystyrene foam or polyurethane. This insulation layer 804 provides insulation for the left and right curved panels of the refrigerated truck, making it easier to transport food.

[0061] Step 107, applying glue: applying a layer of liquid glue on the upper surface of the thermal insulation layer 804 to form a second glue layer 805;

[0062] Step 108, laying the second skin 806: laying the second skin 806 on the second glue coating 805; the second skin 806 can be made of stainless steel, fiberglass or aluminum.

[0063] Step 109 , laying the upper ground film 807 : laying the upper ground film 807 on the second skin 806 ; wherein the upper ground film 807 is larger than the second skin 806 , and is used to prevent the overflowed liquid from adhering to the upper mold 3 during the pressing process.

[0064] Step 110, mold closing: close the upper mold 3 and the lower mold 2; wherein, during the mold closing process, one end of the upper mold 3 drives the workpiece 8 to move downward away from one end of the positioning plate 9; at the same time, the other end of the upper mold 3 acts on the guide plate 10, thereby driving the positioning plate 9 to automatically rotate downward and separate from the upper table of the lower mold 2, so that the drawn workpiece 8 will not interfere with the positioning plate 9, that is, the positioning plate 9 will not hinder the workpiece 8 from deforming during the pressing process; that is, the positioning plate 9 can play a positioning role without affecting the pressing and forming of the workpiece 8.

[0065] It should be noted that after the upper mold 3 moves downward into position, the upper mold 3 is locked with the lower mold 2 and pressed for a preset time to form the workpiece 8. In summer, the pressing time can be 4 hours, while in winter, the pressing time can be 8 hours. Those skilled in the art can flexibly select the pressing time based on parameters such as the ambient temperature, the material and thickness of the skin, and the present invention does not make specific limitations. For overhead crane transportation, the locking operation between the upper mold 3 and the lower mold 2 can be achieved by utilizing the weight of the upper mold 3 and stacking additional weights on the upper mold 3. For the oil press 6 or hydraulic cylinder, the locking operation between the upper mold 3 and the lower mold 2 can be achieved by means of the weight of the upper mold 3 and the hydraulic pressure loaded on the upper mold 3.

[0066] It should be further explained that by pressing the mold at room temperature, curved left and right curved compartment plates of the refrigerated truck can be produced, which improves the more suitable manufacturing process technology for the production of the left and right curved compartment plates of the refrigerated truck; and compared with the hot pressing method, the room temperature pressing of the present invention can effectively reduce energy consumption; and the compartment plates manufactured by this process are not prone to voids, layer separation, and unequal waves caused by incomplete pressing, and can meet the performance requirements of the thermal insulation compartment.

[0067] Step 111, mold opening: open the mold and take out the pressed workpiece 8.

[0068] Step 112, post-processing: directly tear off the lower ground film 801 and the upper ground film 807, and perform trimming and glue removal on the molded curved panel.

[0069] Optionally, after setting the positioning plate 9 in step 102, the step further includes:

[0070] Control the extension and retraction of the electric push rod 116 to adjust the height position of the top end of the support rod 113 to adapt to the height of the end of the lower mold 2 close to the positioning plate 9;

[0071] The lower ground film 801 is laid on the upper surface of the lower mold 2 and the support rods 113.

[0072] It should be noted that the extension of the electric push rod 116 can adjust the extension amount of the top of the support rod 113 relative to the lower mold 2, so that the height position of the top of the support rod 113 matches the height of the end of the upper surface of the lower mold 2 close to the positioning plate 9. In this way, the workpiece 8 is supported at both ends, and even if the curvature of the upper surface of the lower mold 2 is large, the workpiece 8 will not slide down along the upper surface of the lower mold 2.

[0073] Optionally, the step 110 of assembling the mold body includes:

[0074] The upper die 3 drives the end of the workpiece 8 away from the positioning plate 9 to move downward and squeeze the support rod 113 to gradually retract into the slide groove 111; at the same time, the upper die 3 and the support rod 113 clamp the end of the workpiece 8 away from the positioning plate 9.

[0075] It should be noted that the upper mold 3 drives the end of the workpiece 8 away from the positioning plate 9 to move downward, which will drive the end of the workpiece 8 close to the positioning plate 9 to tilt upward; and the support rod 113 can be gradually squeezed back into the slide groove 111, and the support rod 113 will not hinder the workpiece 8 from being pressed into a left-side arc-shaped box plate or a right-side arc-shaped box plate; at the same time, the upper mold 3 and the support rod 113 can clamp the end of the workpiece 8 away from the positioning plate 9, so that the workpiece 8 will not slide down along the lower mold 2 during the mold closing process.

[0076] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation to the invention.

[0077] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0078] Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Mentioning "embodiments" in this article means that the specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present embodiment application. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It can be understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application. Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purpose of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A refrigerated truck curved panel manufacturing device, characterized by: The present invention comprises a lower die (2) and an upper die (3), wherein the upper table of the lower die (2) is configured as a first arc-shaped portion (201); the lower table of the upper die (3) is configured as a second arc-shaped portion (301) adapted to the first arc-shaped portion (201); a workpiece (8) is placed on the first arc-shaped portion (201); one end of the workpiece (8) abuts against a positioning plate (9); the positioning plate (9) is spaced along the side of the lower die (2); the bottom end of the positioning plate (9) is rotatably connected to the side of the lower die (2) via a hinge; a guide plate (10) is provided on the positioning plate (9); when the positioning plate (9) abuts against one side of the workpiece (8), the end of the guide plate (10) away from the positioning plate (9) is tilted upward; A support mechanism (11) is provided on the side of the lower die (2) away from the positioning plate (9), and the support mechanism (11) is used to support one end of the workpiece (8) away from the positioning plate (9). The support mechanism (111) includes a support rod (113), the top end of the support rod (113) is used to support one end of the workpiece (8) away from the positioning plate (9), and the bottom end of the support rod (113) is slidably matched with the lower die (2) and extends into the slide groove (111). The slide groove (111) is provided on the lower die (2), and a spring (114) is installed on the bottom wall of the slide groove (111). The upper end of the spring (114) is used to be connected to the bottom end of the support rod (113); A plurality of support rods (113) are arranged at intervals along the side of the lower mold (2), and the bottom ends of the plurality of support rods (113) are fixedly connected to a slide plate (112), and the slide plate (112) is slidably matched with the slide groove (111). A groove (115) is also provided on the lower mold (2), and the groove (115) and the slide groove (111) are communicated with each other. An electric push rod (116) is fixedly connected to the top wall of the groove (115), and the telescopic end of the electric push rod (116) is against the upper surface of the slide plate (112); The support mechanisms (11) are provided in plurality along the front and back sides of the lower die (2); by controlling the extension and retraction of the electric push rod (116), only the top height position of the support rod (113) corresponding to the support mechanism (11) adapted to the size of the workpiece is matched with the height of one end of the lower die (2) close to the positioning plate (9), while the support mechanisms (11) at other positions are retracted into the lower die (2).

2. The refrigerated truck curved panel manufacturing equipment according to claim 1, characterized in that: The upper mold (3) moves up and down under the drive of the oil press (6) or the hydraulic cylinder or the crane.

3. A process for manufacturing curved compartment panels for refrigerated trucks using the manufacturing equipment according to claim 1 or 2, characterized in that: The specific steps include: Separating the upper mold (3) and the lower mold (2); Rotate the positioning plate (9) onto the upper surface of the lower mold (2); Laying the lower ground film (801) on the upper surface of the lower mold (2); Laying the first skin (802) on the lower ground membrane (801), wherein one end of the first skin (802) abuts against the positioning plate (9); Sprinkle a layer of liquid glue on the upper surface of the first skin (802) to form a first glue layer (803); Laying the thermal insulation layer (804) on the first glue coating layer (803); Sprinkle a layer of liquid glue on the upper surface of the insulation layer (804) to form a second glue layer (805); Laying the second skin (806) on the second glue layer (805); Laying an upper ground film (807) on the second skin (806); Clamp the upper mold (3) and the lower mold (2); During the mold closing process, the upper mold (3) acts on the guide plate (10) to drive the positioning plate (9) to automatically rotate downward; Lock the upper mold (3) and the lower mold (2) and press for a preset time; Open the mold and take out the pressed workpiece (8); Wherein, after the step of rotating the positioning plate (9) onto the upper table surface of the lower mold (2), the following steps are further included: Controlling the extension and retraction of the electric push rod (116) to adjust the height position of the top end of the support rod (113) to match the height of one end of the lower mold (2) close to the positioning plate (9); Laying the lower ground film (801) on the upper table surface of the lower mold (2) and the support rod (113); The controlling of the electric push rod (116) to extend and retract to adjust the height position of the top end of the support rod (113) to match the height of the end of the lower mold (2) close to the positioning plate (9) specifically includes: By controlling the extension and retraction of the electric push rod (116), only the height position of the top end of the support rod (113) corresponding to the support mechanism (11) adapted to the size of the workpiece is matched with the height of one end of the lower mold (2) close to the positioning plate (9), while the support mechanisms (11) at other positions are retracted into the lower mold (2).

4. A manufacturing process for a curved compartment plate for a refrigerated truck according to claim 3, characterized in that: The method of combining the upper mold (3) and the lower mold (2) into a mold body comprises: The upper die (3) drives the end of the workpiece (8) away from the positioning plate (9) to move downward and squeeze the support rod (113) to gradually retract into the slide groove (111); at the same time, the upper die (3) and the support rod (113) clamp the end of the workpiece (8) away from the positioning plate (9).

5. The manufacturing process of the curved compartment plate of a refrigerated truck according to claim 3, characterized in that: After the step of opening the mold and taking out the pressed workpiece (8), the following steps are also included: The molded compartment panels are trimmed and de-glued.

6. The manufacturing process of a curved compartment panel for a refrigerated truck according to claim 3, characterized in that: The first skin (802) and the second skin (806) are made of any one of stainless steel, glass fiber reinforced plastic, and aluminum; and the thermal insulation layer (804) is made of one of extruded polystyrene foam board and polyurethane.

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