High-speed hot pressing paper tray shaping machine line

Abstract

The present application discloses a high-speed hot-pressing paper support shaping machine line, comprising: a station conveyor, a hot press and a stepped stacking mechanism, the station conveyor comprising a plurality of follower paper support mechanisms and a conveying mechanism for cyclically conveying the plurality of follower paper support mechanisms from front to back, each follower paper support mechanism having a closed state for carrying a plurality of paper supports arranged side by side and an open state for simultaneously releasing a plurality of paper supports; the hot press comprises a hot-pressing channel for the follower paper support mechanism to pass through, an upper mold assembly that can be lifted up and down, a lower mold assembly below the hot-pressing channel and an opening assembly arranged adjacent to the upper mold assembly, the opening assembly forces the follower paper support mechanism in the hot-pressing channel to switch from a closed state to an open state when descending with the upper mold assembly; the stepped stacking mechanism is arranged at the rear end of the station conveyor, and comprises a plurality of stacking stations arranged in sequence along the left and right directions, each stacking station stacking the paper supports conveyed by the station conveyor along the up and down directions; the present application has a high degree of automation and effectively improves production efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of the pulp molding industry, and in particular to a high-speed hot-pressing paper tray shaping machine line. Background Art

[0002] During the molding, transportation, and drying processes, the shape and surface finish of wet preforms change, necessitating secondary shaping and trimming. Traditionally, the preforms are manually placed in a press for shaping, then removed and stacked. This approach is inefficient and labor-intensive. Summary of the Invention

[0003] In order to solve the above technical problems, the purpose of this application is to provide a high-speed hot-pressing paper tray shaping machine line with high production efficiency.

[0004] To achieve the above objectives, the present application adopts the following technical solution: a high-speed hot-pressing paper tray shaping machine line, comprising:

[0005] The workstation conveyor comprises a frame, a plurality of follower paper support mechanisms, and a conveying mechanism for cyclically conveying the plurality of follower paper support mechanisms from front to back on the frame, wherein the plurality of follower paper support mechanisms are installed on the conveying mechanism at intervals along the front-to-back direction, and each of the follower paper support mechanisms has a closed state for carrying a plurality of paper supports arranged side by side in the left-right direction and an open state for simultaneously releasing the plurality of paper supports;

[0006] A hot press is arranged in the middle of the workstation conveyor, and a hot pressing channel is formed on the hot press for the multiple follower paper support mechanisms to pass through one by one. The hot press includes an upper mold assembly located on the upper side of the hot pressing channel, a lower mold assembly located on the lower side of the hot pressing channel, and an opening assembly arranged adjacent to the upper mold assembly. The upper mold assembly includes a plurality of upper molds arranged side by side in the left-right direction, and the plurality of upper molds are configured to be able to be synchronously lifted and lowered in the up-down direction relative to the lower mold assembly. The lower mold assembly includes a plurality of lower molds arranged side by side in the left-right direction, and the plurality of upper molds correspond to the plurality of lower molds one by one in the up-down direction. The opening assembly is configured to force the follower paper support mechanism in the hot pressing channel to switch from the closed state to the open state as the plurality of upper molds descend; and

[0007] The step stacking mechanism is arranged at the rear end of the frame. The step stacking mechanism includes a plurality of stacking stations arranged in sequence along the left and right directions. Each of the stacking stations is configured to stack the paper trays transported by the station conveyor along the up and down directions.

[0008] In the above technical solution, it is further preferred that the conveying mechanism includes a pair of conveying chains arranged opposite to each other on the left and right sides and a stepping motor connected to the pair of conveying chains, and the head end and the tail end of each conveying chain are connected.

[0009] In the above technical solution, it is further preferred that each of the follower paper support mechanisms includes a pair of clamping assemblies arranged relatively front and back, and each of the clamping assemblies includes a fixed seat installed on the pair of conveying chains and a follower bracket elastically connected to the corresponding fixed seat along the front and back directions. When the follower paper support mechanism is in the closed state, the distance between the follower brackets of the pair of clamping assemblies is smaller than the size of the paper support in the front and back directions. When the follower paper support mechanism is in the open state, the distance between the follower brackets of the pair of clamping assemblies is larger than the size of the paper support in the front and back directions.

[0010] In the above technical solution, it is further preferred that at least one pair of springs is connected between each of the follower brackets and the corresponding fixing seat, and the at least one pair of springs is arranged at intervals along the left-right direction.

[0011] In the above technical solution, it is further preferred that at least one guide assembly is arranged between each of the follower brackets and the corresponding fixed seat, and the guide assembly includes a guide column extending in the front-to-back direction and a guide hole cooperating with the guide column, the guide column is installed on the follower bracket, and the guide hole is opened on the corresponding fixed seat.

[0012] In the above technical solution, it is further preferred that transition wheels are rotatably mounted on the left and right end portions of each of the follower brackets, and the axis of the transition wheel extends in the left-right direction.

[0013] In the above technical solution, it is further preferred that the opening assembly includes a pair of wedge plates respectively arranged on the left and right sides of the upper mold assembly, the pair of wedge plates are arranged relative to each other front and back, the lower end of each wedge plate has a slope, and the slope is located on the side of the wedge plate away from the other wedge plate, the distance between the slopes of the pair of wedge plates gradually increases from bottom to top, and each wedge plate is configured so that its slope can contact the corresponding transition wheel.

[0014] In the above technical solution, it is further preferred that the minimum distance between the inclined surfaces of the pair of wedge plates is smaller than the distance between the transition wheels of the pair of clamping assemblies when they are in the closed state; and the maximum distance between the inclined surfaces of the pair of wedge plates is equal to the distance between the transition wheels of the pair of clamping assemblies when they are in the open state.

[0015] In the above technical solution, it is further preferred that the hot press includes a plurality of support columns extending in the up and down directions and an upper plate, a middle plate and a lower plate installed from top to bottom on the plurality of support columns, the upper mold assembly and the opening assembly are installed at the lower end portion of the middle plate, the lower mold assembly is installed at the upper end portion of the lower plate, and the middle plate is configured to be able to move back and forth along the plurality of support columns relative to the upper plate and the lower plate.

[0016] In the above technical solution, it is further preferred that the number of the stacking stations is consistent with the number of the upper molds.

[0017] Compared with the prior art, this application achieves the following beneficial effects:

[0018] This equipment uses the follow-up paper support mechanism of the workstation conveyor to automatically step the paper support to the hot press, matching the hot press frequency to meet the hot press's rhythmic hot press shaping. This application has a high degree of automation, effectively improving the hot press shaping efficiency of the paper support and reducing the workload of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a high-speed hot-pressing paper tray shaping machine line provided in an embodiment of the present application;

[0020] Figure 2 for Figure 1 A partial enlarged schematic diagram of point A in the middle;

[0021] Figure 3 for Figure 1 The main view of the high-speed hot pressing paper tray shaping machine line;

[0022] Figure 4 For the Figure 3 The cross-sectional view taken along line BB in FIG.

[0023] Figure 5 for Figure 3 A partial enlarged schematic diagram showing the upper mold and opening assembly being located above the follower paper support mechanism;

[0024] Figure 6 for Figure 5 A partially enlarged schematic diagram of the follower paper support mechanism in a closed state;

[0025] Figure 7 for Figure 5 A partially enlarged schematic diagram of the follower paper support mechanism in the open state;

[0026] Figure 8 for Figure 1 Schematic diagram of the three-dimensional structure of the ladder stacking mechanism;

[0027] Figure 9 for Figure 8 A front view of the second cylinder of the step stacking mechanism in a retracted state;

[0028] Figure 10 for Figure 9 A top view of the step stacking mechanism in FIG.

[0029] Figure 11 for Figure 9 A side view of the step stacking mechanism in FIG.

[0030] Figure 12 for Figure 8 Front view of the second cylinder of the step stacking mechanism in the extended state.

[0031] Among them: 100, shaping machine line; 10, workstation conveyor; 1, frame; 2, follow-up paper support mechanism; 21, clamping assembly; 211, fixed seat; 212, follow-up bracket; 213, spring; 214, guide assembly; 2141, guide column; 2142, guide hole; 215, transition wheel; 3, conveying mechanism; 31, conveying chain; 32, stepping motor; 20, hot press; 4, upper mold assembly; 41, upper mold; 5, lower mold assembly; 51, lower mold; 6, opening assembly; 61, wedge plate; 611, inclined plane; 7, support column; 8, upper plate; 9, middle plate; 11, lower plate; 12, drive assembly; 30, step stacking mechanism; 13, stacking rack; 131, stacking notch; 14, first cylinder; 15, second cylinder; 16, support angle steel; 17, alignment assembly; 200, paper support. DETAILED DESCRIPTION

[0032] In order to describe the technical content, structural features, achieved purposes and effects of the application in detail, the technical solutions in the embodiments of the application will be described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all of the embodiments. In the following description, for the purpose of explanation, many specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in the case of one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but are not necessarily exclusive. For example, without departing from the inventive concept, the specific shape, structure and characteristics of the exemplary embodiment may be used or implemented in another exemplary embodiment.

[0033] An embodiment of the present application provides a high-speed hot-pressed paper tray shaping machine line, which is arranged in a paper tray production line and is used for secondary shaping and trimming of wet paper trays after drying.

[0034] like Figure 1-4As shown, the shaping machine line 100 includes a workstation conveyor 10, a hot press 20 and a step stacking mechanism 30. The workstation conveyor 10 is used to cyclically convey the paper tray 200 to the hot press 20 and the step stacking mechanism 30. The hot press 20 is used to shape the paper tray 200 in batches. The step stacking mechanism 30 is used to receive and stack the shaped paper tray 200.

[0035] The workstation conveyor 10 includes a frame 1, multiple follower paper support mechanisms 2, and a conveying mechanism 3 that circulates the multiple follower paper support mechanisms 2 from front to back on the frame 1. The conveying mechanism 3 includes a pair of conveyor chains 31 arranged opposite each other on the left and right sides, and a stepper motor 32 drivingly connected to the pair of conveyor chains 31. The leading end and the trailing end of each conveyor chain 31 are connected to form a loop, so that the conveyor chain 31 is driven by the stepper motor 32 to circulate.

[0036] The left and right ends of each follower paper support mechanism 2 are mounted on a pair of conveyor chains 31, with multiple follower paper support mechanisms 2 installed at intervals along the extension direction of the conveyor chains 31. Each follower paper support mechanism 2 is capable of carrying multiple paper supports 200 arranged side by side in the left-right direction. When the stepper motor 32 drives the pair of conveyor chains 31, the multiple follower paper support mechanisms 2 drive the supported paper supports 200 to move in a step-by-step manner from front to back. In this application, the operator only needs to place the paper supports side by side on each follower paper support mechanism 2, and the conveyor mechanism 3 drives the follower paper support mechanisms 2 to move and transport the paper supports, reducing the operator's workload and improving transportation efficiency.

[0037] Under the action of external force, each follower paper support mechanism 2 has a closed state in which it supports multiple paper supports 200 arranged side by side, and an open state in which it releases multiple paper supports 200 at the same time.

[0038] like Figure 2-7As shown, each follower paper support mechanism 2 includes a pair of clamping assemblies 21 arranged in a front-to-rear direction. Each clamping assembly 21 includes a fixed base 211 mounted on a pair of conveyor chains 31 and a follower bracket 212 elastically connected to the corresponding fixed base 211 in the front-to-rear direction. At least one pair of springs 213 is connected between each follower bracket 212 and the corresponding fixed base 211. The at least one pair of springs 213 is spaced apart in the left-to-right direction. When not subjected to external forces, the springs 213 are in a normal state. In this state, the follower paper support mechanism 2 is in a closed state. The distance D1 between the follower brackets 212 of the pair of clamping assemblies 21 is less than the front-to-rear dimension W of the paper support 200. At least a portion of the pair of follower brackets 212 is located below the paper support 200 to support the paper support 200, thereby enabling the paper support 200 to be loaded below the paper support 200. When subjected to external pressure, the spring 213 is compressed, and the follower paper support mechanism 2 is in the open state. The distance D2 between the follower brackets 212 of the pair of clamping assemblies 21 is greater than the dimension W of the paper support 200 in the front-to-back direction. The pair of follower brackets 212 move away from under the multiple paper supports 200, allowing the multiple unsupported paper supports 200 to fall through the gap between the pair of follower brackets 212. When the pair of follower brackets 212 are no longer under external pressure, the spring 213 uses its own elastic force to push the follower brackets 212 back to the original position, causing the follower paper support mechanism 2 to return from the open state to the closed state.

[0039] At least one guide assembly 214 is arranged between each follower bracket 212 and the corresponding fixed seat 211. The guide assembly 214 includes a guide column 2141 extending in the front-to-back direction and a guide hole 2142 cooperating with the guide column 2141. The guide column 2141 is installed on the follower bracket 212, and the guide hole 2142 is opened on the corresponding fixed seat 211.

[0040] The hot press 20 is located in the middle of the workstation conveyor 10 and performs hot pressing and shaping on the paper support 200 on the follower paper support mechanism 2, which is being fed step by step by the conveyor mechanism 3. The time required for each step of the stepper motor 32 corresponds to the time required for each hot pressing and shaping operation of the hot press 20. The stepping of the workstation conveyor 10 is coordinated with the hot pressing frequency of the hot press 20.

[0041] The hot press 20 is formed with a hot pressing channel for multiple follower paper support mechanisms 2 to pass through one by one. The hot press 20 includes an upper mold assembly 4 located on the upper side of the hot pressing channel, a lower mold assembly 5 located on the lower side of the hot pressing channel, and an opening assembly 6 arranged adjacent to the upper mold assembly 4. The upper mold assembly 4 includes multiple upper molds 41 arranged side by side in the left-right direction, and the multiple upper molds 41 are configured to be able to be synchronously lifted and lowered in the up-down direction relative to the lower mold assembly 5. The lower mold assembly 5 includes multiple lower molds 51 arranged side by side in the left-right direction. The multiple upper molds 41 correspond to the multiple lower molds 51 one by one up and down. A group of upper molds 41 and lower molds 51 corresponding to each other up and down form a hot pressing station, and each hot pressing station can accommodate a paper support for hot pressing and shaping. The opening assembly 6 is configured to force the follower paper support mechanism 2 in the hot pressing channel to switch from a closed state to an open state as the multiple upper molds 41 descend.

[0042] On this shaping machine line 100, only one or two operators are needed to place the paper supports 200 side by side on each follower paper support mechanism 2 at the front end of the workstation conveyor 10. Multiple upper molds 41 and lower molds 51 that cooperate with each other can simultaneously perform hot pressing shaping on multiple paper supports 200 on each follower paper support mechanism 2, effectively saving labor and improving production efficiency.

[0043] The hot press 20 also includes a plurality of support columns 7 extending in the vertical direction, and an upper plate 8, a middle plate 9, and a lower plate 11 mounted from top to bottom on the plurality of support columns 7. The upper mold assembly 4 and the opening assembly 6 are mounted on the lower end of the middle plate 9, and the lower mold assembly 5 is mounted on the upper end of the lower plate 11. The middle plate 9 is configured to be able to move back and forth along the plurality of support columns 7 relative to the upper plate 8 and the lower plate 11. A drive assembly 12 for driving the middle plate 9 to rise and fall is mounted on the upper plate 8. The plurality of support columns 7 are used to enhance the stability of the entire hot press 20 and provide guidance for the up and down movement of the middle plate 9. Driven by the drive assembly 12, the middle plate 9 moves downward, so that each upper mold 41 and the corresponding lower mold 51 press the paper support 200 therebetween for hot pressing and shaping.

[0044] The opening assembly 6 includes a pair of wedge plates 61 arranged on the left and right sides of the upper mold assembly 4, respectively. The pair of wedge plates 61 are arranged relative to each other front and back. The lower end of each wedge plate 61 has an inclined surface 611, and the inclined surfaces 611 of the pair of wedge plates 61 are all located on the side away from the other wedge plate. The distance between the inclined surfaces 611 of the pair of wedge plates 61 gradually increases from bottom to top, so that when the pair of wedge plates 61 are inserted from top to bottom between the pair of clamping assemblies 21, the distance between the pair of follower brackets 212 gradually increases.

[0045] As the upper mold assembly 4 descends, the opening assembly 6 applies an outward thrust to the pair of follower brackets 212 of the follower paper support mechanism 2, causing the follower paper support mechanism 2 to switch from a closed state to an open state. At this point, the pair of follower brackets 212 move away from each other under the external force of the opening assembly 6, and the multiple paper supports 200 fall onto the multiple lower molds 51 below the hot pressing channel. The upper mold assembly 4 continues to descend until each upper mold 41 is pressed against the corresponding lower mold 51, and the follower paper support mechanism 2 in the hot pressing channel remains in the open state. The upper and lower molds perform hot pressing and shaping on the pressed paper supports 200. After shaping is completed, the multiple upper molds 41 of the upper mold assembly 4 rise synchronously. During the ascent, each upper mold 41 draws air from the paper supports 200 to adhere to the upper mold 41, while the corresponding lower mold 51 blows air upward to retain the paper supports 200 on the upper mold 41. During the rising process of the upper mold assembly 4, as the inclined surface 611 of the wedge plate 61 changes, a pair of follower brackets 212 gradually approach under the action of the corresponding springs 213 until the follower paper support mechanism 2 switches from the open state to the closed state. At this time, the upper mold assembly 4 and the opening assembly 6 both rise to the upper side of the follower paper support mechanism 2, and each upper mold 41 blows air downward so that the paper support 200 adsorbed by the upper mold 41 falls onto the follower paper support mechanism 2 in the closed state in the hot pressing channel.

[0046] Each follower bracket 212 has a transition wheel 215 rotatably mounted on its left and right ends. The axis of each transition wheel 215 extends in the left-right direction. The transition wheel 215 on each follower bracket 212 corresponds to the wedge plate 61 above it. When the opening assembly 6 forces the follower paper support mechanism 2 to switch between the closed and open states, the transition wheel 215 contacts the corresponding inclined surface 611 of the wedge plate 61, thereby reducing friction between the wedge plate 61 and the follower bracket 212 and ensuring smooth switching of the follower paper support mechanism 2 between different states.

[0047] The minimum distance d1 between the inclined surfaces 611 of the pair of wedge plates 61 is less than the distance d3 between the transition wheels 215 of the pair of clamping assemblies 21 when they are in the closed state; the maximum distance d2 between the inclined surfaces 611 of the pair of wedge plates 61 is equal to the distance d4 between the transition wheels 215 of the pair of clamping assemblies 21 when they are in the open state.

[0048] like Figure 1As shown, the stepped palletizing mechanism 30 is positioned at the rear end of the frame 1 to receive the multiple paper trays 200 formed by heat pressing in the heat press 20 on each follower paper tray mechanism 2. The stepped palletizing mechanism 30 includes multiple palletizing stations arranged in a left-right direction. Each station is configured to stack the paper trays 200 conveyed by the station conveyor 10 in the vertical direction. The number of palletizing stations matches the number of upper molds 41, enabling the stepped palletizing mechanism 30 to simultaneously palletize multiple paper trays 200 on the follower paper tray mechanism 2.

[0049] like Figure 8-12 As shown, the stepped palletizing mechanism 30 includes a palletizing rack 13 mounted on the frame 1, a plurality of first cylinders 14 mounted below the palletizing rack 13, and a plurality of second cylinders 15 mounted on the palletizing rack 13. The palletizing rack 13 is located above the workstation conveyor 10. The palletizing rack 13 is provided with palletizing notches 131 spaced apart in the left-right direction. Each palletizing station is provided with a palletizing notch 131, and each palletizing notch 131 is configured to allow a paper holder 200 to pass through in the vertical direction. A first cylinder 14 is disposed below each palletizing notch 131, and each first cylinder 14 is capable of pushing a paper holder 200 in the vertical direction. A pair of second cylinders 15 is disposed at each palletizing notch 131. The pair of second cylinders 15 are arranged in a front-to-back relationship at the corresponding palletizing notch 131. A support angle steel 16 is mounted on the gas rod of each second cylinder 15, and each second cylinder 15 has an extended state and a retracted state. When the pair of second cylinders 15 of the stacking gap 131 are in the extended state, the distance D3 between the pair of supporting angle steels 16 is smaller than the dimension W of the paper holder 200 in the front-to-back direction, so that the pair of supporting angle steels 16 can support the bottom of the stacked multiple paper holders 200 to achieve stacking of the paper holders 200; when the pair of second cylinders 15 of the stacking gap 131 are in the retracted state, the distance D4 between the pair of supporting angle steels 16 is larger than the dimension W of the paper holder 200 in the front-to-back direction, so that the first cylinder 14 below lifts the paper holder 200 to the top of the pair of supporting angle steels 16, thereby facilitating the pair of supporting angle steels 16 to stack the paper holders 200.

[0050] When there is a follower paper support mechanism 2 carrying the paper support 200 between each first cylinder 14 and the stacking gap 131 above, each first cylinder 14 lifts the paper support 200 on the follower paper support mechanism 2 upwards, and at the same time, a pair of second cylinders 15 at the corresponding stacking gap 131 switches to a retracted state, and the first cylinder 14 quickly lifts the lifted paper support 200 through the stacking gap 131 to above a pair of supporting angles 16; a pair of second cylinders 15 switches to an extended state to support the bottom of the paper support 200, and the stacking station realizes one stacking, and at the same time, the first cylinder 14 retracts downward to wait for the next follower paper support mechanism 2 to perform the stacking operation.

[0051] Alignment components 17 are respectively provided at the four corners of each stacking notch 131 . The four alignment components 17 align the multiple paper holders 200 stacked at the stacking notch 131 up and down to ensure the final stacking neatness.

[0052] The working principle of the present application is as follows: the operator sequentially places paper supports 200, the same number as the number of hot pressing stations, side by side on the follower paper support mechanism 2 that is rotated to the front end of the frame. The follower paper support mechanism 2 with the paper supports 200 placed thereon is conveyed from front to back in a step-by-step manner by the conveying mechanism 3. The conveying mechanism 3 cooperates with the hot pressing frequency of the hot press 20 to gradually convey the follower paper support mechanism 2 into the hot press 20. When the follower paper support mechanism 2 enters the hot pressing channel of the hot press 20, the middle plate 9 of the hot press 20 drives the upper mold assembly 4 and the opening assembly 6 to move downward. During the downward movement, the opening assembly 6 forces the follower paper support mechanism 2 in the hot pressing channel to enter the open state. The multiple paper supports 200 on the follower paper support mechanism 2 fall respectively onto the multiple lower molds 51 below. The multiple upper molds 41 on the middle plate 9 press down on the corresponding lower molds 51, and the paper supports between the two are hot pressed and shaped. After the hot pressing is completed, the middle plate 9 drives the upper mold assembly 4 and the opening assembly 6 to rise, while the lower mold 51 blows air upward and the upper mold 41 inhales air, so that each paper holder 200 is attached to the corresponding upper mold 41 and rises. When the opening assembly 6 and the upper mold assembly 4 both rise to the upper side of the follower paper holder mechanism 2 in the hot pressing channel, the follower paper holder mechanism 2 loses the external force applied by the opening assembly 6 and returns to the closed state from the open state. At the same time, each upper mold 41 blows air downward, so that the attached paper holder 200 falls onto the follower paper holder mechanism 2 that has returned to the closed state in the hot pressing channel. The conveying mechanism 3 conveys the follower paper holder mechanism 2 and the multiple hot pressing and shaping paper holders supported by it to the downstream, and conveys the next follower paper holder mechanism 2 supporting unheat pressed paper holders into the hot pressing channel for hot pressing and shaping. The follower paper support mechanism 2, which supports multiple paper supports that have been hot-pressed and shaped, is transported backward to the stepped stacking mechanism. Multiple paper supports on the follower paper support mechanism 2 enter multiple stacking stations at the same time. The first cylinder 14 of each stacking station is lifted up, and the corresponding pair of second cylinders 15 are switched to the retracted state. The first cylinder 14 sends the paper support upward to the top of the stacking gap 131, and the pair of second cylinders 15 are switched to the extended state. The stacked paper supports are supported by a pair of supporting angles 16 arranged opposite to each other in the front and back. The first cylinder 14 descends and retracts. After the follower paper support mechanism 2 is idle, it exits from the stepped stacking mechanism 30 under the transportation of the conveying mechanism 3, and is circulated and transported to the front end of the frame 1 under the transportation of the conveying mechanism 3 to re-receive the paper supports that have not been hot-pressed and shaped, and then the paper supports are driven to be hot-pressed and stacked in sequence under the transportation of the conveying mechanism 3.

[0053] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments. The above embodiments and descriptions are only for illustrative purposes. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. The scope of protection claimed in the present application is defined by the appended claims, the description and their equivalents.

Claims

1. A high-speed hot-pressing paper tray shaping machine line, characterized in that: include: The workstation conveyor comprises a frame, a plurality of follower paper support mechanisms, and a conveying mechanism for cyclically conveying the plurality of follower paper support mechanisms from front to back on the frame, wherein the plurality of follower paper support mechanisms are installed on the conveying mechanism at intervals along the front-to-back direction, and each of the follower paper support mechanisms has a closed state for carrying a plurality of paper supports arranged side by side in the left-right direction and an open state for simultaneously releasing the plurality of paper supports; A hot press is arranged in the middle of the workstation conveyor, and a hot pressing channel is formed on the hot press for the multiple follower paper support mechanisms to pass through one by one. The hot press includes an upper mold assembly located on the upper side of the hot pressing channel, a lower mold assembly located on the lower side of the hot pressing channel, and an opening assembly arranged adjacent to the upper mold assembly. The upper mold assembly includes a plurality of upper molds arranged side by side in the left-right direction, and the plurality of upper molds are configured to be able to be synchronously lifted and lowered in the up-down direction relative to the lower mold assembly. The lower mold assembly includes a plurality of lower molds arranged side by side in the left-right direction, and the plurality of upper molds correspond to the plurality of lower molds one by one in the up-down direction. The opening assembly is configured to force the follower paper support mechanism in the hot pressing channel to switch from the closed state to the open state as the plurality of upper molds descend; and The step stacking mechanism is arranged at the rear end of the frame. The step stacking mechanism includes a plurality of stacking stations arranged in sequence along the left and right directions. Each of the stacking stations is configured to stack the paper trays transported by the station conveyor along the up and down directions.

2. The high-speed hot-pressing paper tray shaping machine line according to claim 1, characterized in that: The conveying mechanism comprises a pair of conveying chains arranged opposite to each other on the left and right sides and a stepping motor connected to the pair of conveying chains in a transmission manner. The head end and the tail end of each conveying chain are connected.

3. The high-speed hot-pressing paper tray shaping machine line according to claim 2, characterized in that: Each of the follower paper support mechanisms includes a pair of clamping assemblies arranged relatively front and back, and each of the clamping assemblies includes a fixed seat installed on the pair of conveying chains and a follower bracket elastically connected to the corresponding fixed seat along the front-to-back direction. When the follower paper support mechanism is in the closed state, the distance between the follower brackets of the pair of clamping assemblies is smaller than the size of the paper support in the front-to-back direction. When the follower paper support mechanism is in the open state, the distance between the follower brackets of the pair of clamping assemblies is larger than the size of the paper support in the front-to-back direction.

4. The high-speed hot-pressing paper tray shaping machine line according to claim 3, characterized in that: At least one pair of springs is connected between each of the follower brackets and the corresponding fixing seat, and the at least one pair of springs is arranged at intervals along the left-right direction.

5. The high-speed hot-pressing paper tray shaping machine line according to claim 4, characterized in that: At least one guide assembly is arranged between each of the follower brackets and the corresponding fixed seat. The guide assembly includes a guide column extending in the front-to-back direction and a guide hole cooperating with the guide column. The guide column is installed on the follower bracket, and the guide hole is opened on the corresponding fixed seat.

6. The high-speed hot-pressing paper tray shaping machine line according to claim 3, characterized in that: The left and right end portions of each follower bracket are respectively rotatably mounted with transition wheels, and the axis of the transition wheel extends in the left and right directions.

7. The high-speed hot-pressing paper tray shaping machine line according to claim 6, characterized in that: The opening assembly includes a pair of wedge plates arranged on the left and right sides of the upper mold assembly, respectively. The pair of wedge plates are arranged relative to each other front and back, and the lower end of each wedge plate has an inclined surface, and the inclined surface is located on the side of the wedge plate away from the other wedge plate. The distance between the inclined surfaces of the pair of wedge plates gradually increases from bottom to top, and each wedge plate is configured so that its inclined surface can contact the corresponding transition wheel.

8. The high-speed hot-pressing paper tray shaping machine line according to claim 7, characterized in that: The minimum distance between the inclined surfaces of the pair of wedge plates is less than the distance between the transition wheels of the pair of clamping assemblies when they are in the closed state; the maximum distance between the inclined surfaces of the pair of wedge plates is equal to the distance between the transition wheels of the pair of clamping assemblies when they are in the open state.

9. The high-speed hot-pressing paper tray shaping machine line according to claim 1, characterized in that: The hot press includes a plurality of support columns extending in the up-down direction and an upper plate, a middle plate and a lower plate installed from top to bottom on the plurality of support columns, the upper mold assembly and the opening assembly are installed at the lower end portion of the middle plate, the lower mold assembly is installed at the upper end portion of the lower plate, and the middle plate is configured to be able to move back and forth along the plurality of support columns relative to the upper plate and the lower plate.

10. The high-speed hot-pressing paper tray shaping machine line according to claim 1, characterized in that: The number of the stacking stations is consistent with the number of the upper molds.

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