Unstacking and stacking equipment for prefabricated part production and prefabricated part production line

Abstract

The utility model discloses unstacking and stacking equipment for prefabricated part production and a prefabricated part production line. The unstacking and stacking equipment comprises a frame, a bearing frame, a lifting push-pull device and a telescopic holding device, and a mold containing area is arranged below the area defined by the frame; the bearing frame is located in an area defined by the frame, and the middle of the bearing frame is provided with a receding area used for containing a mold or a mold table. A plurality of lifting push-pull devices configured to adjust the position of the bearing frame in the vertical direction are mounted on the bearing frame; telescopic holding devices are arranged on the two opposite sides of the bearing frame correspondingly, and the telescopic ends of the telescopic holding devices are provided with first positions extending outwards towards the side of the mold containing area and second positions retracting back to the side of the mold containing area. At the first position, the telescopic ends of the multiple telescopic holding devices are located at the position capable of bearing a mold or a mold table; and in the second position, the telescopic ends of the multiple telescopic holding devices are located at the position for avoiding the mold or the mold table. The unstacking and stacking equipment can meet the requirements of assembly line production of prefabricated parts.

Description

TECHNICAL FIELD

[0001] The utility model relates to prefabricated part production technical field, concretely relates to prefabricated part production is used to dismantle and stack equipment and prefabricated part production line. BACKGROUND

[0002] In some fields, the use amount of prefabricated part is larger, and the flow line production of prefabricated part has become the important development direction currently. As known to all, after completing cloth technology, prefabricated part needs to be cured in the set curing environment. In order to save curing kiln occupied space, improve transfer efficiency, the mould or mould table after cloth needs to be stacked and then transferred to curing kiln for curing, and after completing curing technology, demolding technology is also needed to be carried out to facilitate prefabricated part demolding. Therefore, developing a kind of equipment meeting the requirements of dismantling and stacking for the flow line production of prefabricated part has important significance.

[0003] In the production of some larger prefabricated parts, the weight of the mould after cloth is larger, so higher requirements are put forward for the mechanical properties of the dismantling and stacking equipment. Therefore, developing a kind of dismantling and stacking equipment capable of meeting the production of larger prefabricated parts has important significance. SUMMARY

[0004] The purpose of the present application is at least to provide a kind of prefabricated part production is used to dismantle and stack equipment and prefabricated part production line capable of meeting the flow line production of prefabricated part. It is realized specifically through the following scheme:

[0005] In the first aspect, the present application provides a kind of prefabricated part production is used to dismantle and stack equipment, including frame, bearing frame, lifting push-pull device, telescopic holding device, the lower part of the area surrounded by frame is mould placement area;Bearing frame is located in the area surrounded by frame, and the middle part of bearing frame has a let area, and the let area is used to accommodate mould or mould table;A plurality of lifting push-pull devices are installed on bearing frame, and the plurality of lifting push-pull devices are configured to adjust the position of bearing frame in vertical direction;The opposite sides of bearing frame are respectively provided with a plurality of telescopic holding devices, and the telescopic end of telescopic holding device has a first position that extends towards one side of mould placement area and a second position that retracts away from one side of mould placement area;When in the first position, the telescopic end of the plurality of telescopic holding devices is in the position capable of supporting mould or mould table;When in the second position, the telescopic end of the plurality of telescopic holding devices is in the position avoiding mould or mould table.

[0006] The present application installs a plurality of lifting push-pull devices on bearing frame, which can adjust the position of bearing frame in vertical direction under the action of lifting push-pull device, and further can obtain or release mould or mould table under the action of the plurality of telescopic holding devices installed on bearing frame, so that the prefabricated part production is used to dismantle and stack equipment to meet the requirements of dismantling and stacking.

[0007] In some preferred embodiments of the present application, the lifting and pulling device is further selectively a telescopic cylinder, the telescopic cylinder is vertically arranged, the cylinder body of the telescopic cylinder is fixedly connected with the carrying frame, and the end of the telescopic rod of the telescopic cylinder abuts against the foundation; or the lifting and pulling device is a telescopic cylinder, the telescopic cylinder is vertically arranged, the telescopic cylinder of the telescopic cylinder is fixedly connected with the carrying frame, and the end of the cylinder body of the telescopic cylinder abuts against the foundation; or the lifting and pulling device is a screw rod lifting platform, the carrying frame is connected with the frame through the screw rod lifting platform; or the lifting and pulling device is a telescopic cylinder, the telescopic cylinder is vertically arranged, the telescopic cylinder is installed on the frame and located above the carrying frame, and the telescopic end of the telescopic cylinder is connected with the carrying frame. By making the lifting and pulling device a telescopic cylinder or a screw rod lifting platform, the automatic control of the lifting and pulling device can be realized, so as to better meet the automatic production needs of the prefabricated parts.

[0008] In some preferred embodiments of the present application, the carrying frame is in the form of a square frame as a whole, the prefabricated part production unstacking and stacking equipment comprises four lifting and pulling devices, and one lifting and pulling device is connected near each corner of the carrying frame. By making the carrying frame in the form of a square frame as a whole and connecting one lifting and pulling device near each corner of the carrying frame, the carrying frame can be lifted and lowered under the action of the four lifting and pulling devices, so that the stress on the carrying frame is more uniform.

[0009] In some preferred embodiments of the present application, the frame comprises four columns, a plurality of guide wheel sets are further fixed to the side of the carrying frame, each column is connected with the carrying frame through the guide wheel set, and the carrying frame can move along the column in the vertical direction through the guide wheel set. By connecting the carrying frame with the column through the guide wheel set, the carrying frame can be lifted and lowered more stably and with less resistance under the action of the guide wheel set, so as to better meet the stacking requirements of heavy-duty molds or mold tables.

[0010] In some preferred embodiments of the present application, the column is a square column, the guide wheel set comprises an L-shaped mounting seat, the L-shaped mounting seat is fixedly connected with the carrying frame, and a plurality of guide wheels are arranged on the two mutually perpendicular surfaces of the L-shaped mounting seat, and the L-shaped mounting seat is connected with the two surfaces of the column through the plurality of guide wheels.

[0011] In some preferred embodiments of the present application, each column is movably connected with the carrying frame through a plurality of vertically and spaced guide wheel sets. By movably connecting each column with the carrying frame through a plurality of vertically and spaced guide wheel sets, the column can better constrain and guide the carrying frame, and the carrying capacity of the carrying frame can be effectively improved, so as to better meet the unstacking and stacking requirements of large prefabricated parts production.

[0012] In some preferred embodiments of the present application, the preform production unstacking and restacking device comprises four telescopic holding devices, the four telescopic holding devices are installed at the bottom of the carrier frame, and two telescopic holding devices are arranged on opposite sides of the mold placement area.

[0013] In some preferred embodiments of the present application, the telescopic holding device comprises a pneumatic telescopic cylinder and a holding rod, the holding rod is connected to the telescopic end of the pneumatic telescopic cylinder, and the pneumatic telescopic cylinder is fixedly connected to the bottom of the carrier frame; or the telescopic holding device comprises a hydraulic telescopic cylinder and a holding rod, the holding rod is connected to the telescopic end of the hydraulic telescopic cylinder, and the hydraulic telescopic cylinder is fixedly connected to the bottom of the carrier frame.

[0014] In the second aspect, the present application also relates to a preform production line, comprising a mold transfer device and a preform production unstacking and restacking device according to any one of the preceding embodiments; the mold transfer device is configured to transfer a mold or a mold table into the mold placement area and transfer the mold or the mold table out of the mold placement area.

[0015] In some preferred embodiments of the present application, the preform production line is used for producing bridge deck members and / or the preform production line is used for producing small preform members. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a structural schematic diagram of a preform production unstacking and restacking device according to some embodiments of the present application from a first perspective;

[0017] Figure 2 FIG. 2 is a structural schematic diagram of the preform production unstacking and restacking device according to some embodiments of the present application from a second perspective; Figure 1

[0018] Figure 3 FIG. 3 is a structural schematic diagram of the preform production unstacking and restacking device according to some embodiments of the present application from a third perspective, in which multiple layers of mold tables are stacked in the mold placement area. Figure 1

[0019] FIG. 4 is a structural schematic diagram of the preform production unstacking and restacking device according to some embodiments of the present application from a fourth perspective, in which multiple layers of mold tables are stacked in the mold placement area.

[0020] 1, frame; 11, vertical column; 12, cross beam;

[0021] 2, carrier frame;

[0022] 3, lifting and pulling device;

[0023] 4, telescopic holding device; 41, hydraulic telescopic cylinder; 42, holding rod;

[0024] 5, guide wheel set;

[0025] 6, mold transfer device. DETAILED DESCRIPTION ​​

[0026] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. While exemplary embodiments of the present application are illustrated, it is to be understood that the present application can be carried out in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0027] It is to be understood that the terms used herein are merely for the purpose of describing particular embodiments and are by no means intended to be limiting. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and the like are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described unless specifically indicated as such. It is also to be understood that additional or alternative steps can be employed.

[0028] Although the terms "first," "second," "third," and the like can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be merely used to distinguish one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first," "second," and the like used herein are not intended to connote an ordering, but rather are used to distinguish one element, component, region, layer or section from another. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0029] Spatially relative terms, such as "inner," "outer," "inwardly," "outwardly," "lower," "bottom," "top," "upper," and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms can be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0030] In the description of the utility model, it is necessary to explain that the terms "center", "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0031] In the description of the utility model, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "provided with", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, and can also be detachably connected; can be mechanically connected, and can also be electrically connected; can be directly connected, and can also be indirectly connected through an intermediate medium; can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0032] In the present application, a certain value above includes the number, for example, two or more includes two.

[0033] The technical scheme of the utility model will be described clearly and completely in combination with the drawings, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary skilled persons in the art without creative labor belong to the scope of protection of the utility model.

[0034] The following will be described according to Figures 1 to 3 The utility model provides a prefabricated part production uses to dismantle and pile up equipment and prefabricated part production line.

[0035] The application provides a preform production unstacking and stacking equipment, which comprises a frame 1, a bearing frame 2, a lifting and pulling device 3 and a telescopic holding and taking device 4. The lower part of the area surrounded by the frame 1 is a mold placing area. The bearing frame 2 is located in the area surrounded by the frame 1, and the middle part of the bearing frame 2 has a giving area for accommodating the mold or mold table. A plurality of lifting and pulling devices 3 are installed on the bearing frame 2. The plurality of lifting and pulling devices 3 are configured to adjust the position of the bearing frame 2 in the vertical direction. The opposite sides of the bearing frame 2 are respectively provided with a plurality of telescopic holding and taking devices 4. The telescopic end of the telescopic holding and taking device 4 has a first position which extends outward to the side of the mold placing area and a second position which is retracted away from the side of the mold placing area. In specific work, when the telescopic end of the telescopic holding and taking device 4 is in the first position, the telescopic end of the plurality of telescopic holding and taking devices 4 is in a position capable of supporting the mold or mold table; when the telescopic end of the telescopic holding and taking device 4 is in the second position, the telescopic end of the plurality of telescopic holding and taking devices 4 is in a position avoiding the mold or mold table. The application installs a plurality of lifting and pulling devices 3 on the bearing frame 2, which can adjust the position of the bearing frame 2 in the vertical direction under the action of the lifting and pulling device 3. Further, the mold or mold table can be obtained or released under the action of the plurality of telescopic holding and taking devices 4 installed on the bearing frame 2, so that the preform production unstacking and stacking equipment can meet the requirements of unstacking and stacking.

[0036] The "preform production unstacking and stacking equipment" in the application refers to an equipment for stacking and / or unstacking the mold or mold table used in preform production during preform production. In specific implementation, the preform production unstacking and stacking equipment can be selectively used for stacking the mold and / or mold table during preform production, or used for unstacking the mold and / or mold table during preform production; or the preform production unstacking and stacking equipment can be selectively used for unstacking and stacking the mold and / or mold table during preform production. The specific function of the preform production unstacking and stacking equipment can be selected according to the setting of the production line.

[0037] It should be noted that the "frame" in the application is not specifically limited and can be selectively set according to actual needs. In specific implementation, the frame 1 is preferably processed by welding, connecting member connection and the like from a profile. As shown in Figure 1 、 Figure 2 and Figure 3 , the frame 1 is a square frame structure processed from a square steel tube, specifically comprising four vertically arranged columns 11 installed on the foundation, and the adjacent columns 11 are connected by beams 12.

[0038] The "lifting and pushing device" in this application is not specifically limited; it can be any pushing and pulling device capable of adjusting the vertical position of the support frame 2. In specific implementations, the lifting and pushing device 3 can selectively be a pushing and pulling device including a telescopic cylinder, a pushing and pulling device including a screw lifting platform, or a pushing and pulling device including a gear and rack. Specifically, as follows... Figures 1 to 3 As shown, the lifting and pushing device 3 includes telescopic cylinders, and multiple telescopic cylinders are all vertically arranged; the cylinder body of the telescopic cylinder is fixedly connected to the support frame 2, and the telescopic rod of the telescopic cylinder faces downward and is connected to the foundation (e.g. Figure 2 (As shown); In actual operation, the cylinder can drive the support frame 2 to adjust its position in the vertical direction.

[0039] Similarly, the "telescopic holding device" in this application is not specifically limited; it can be any device capable of holding and releasing the mold or mold table through telescopic movement. In specific implementations, the telescopic holding device 4 is preferably a device that includes a telescopic cylinder.

[0040] It should be noted that the number of lifting and pushing devices 3 connected to the support frame 2 in this application is not specifically limited, and can be selectively set according to the stacking needs. The number of lifting and pushing devices 3 connected to the support frame 2 can be selectively two, four, six, eight, or ten, and the distribution of the lifting and pushing devices 3 can be selectively set according to the load-bearing conditions. Specifically, as follows... Figures 1 to 3 As shown, there are four lifting and pushing devices 3, which are installed near the four corners of the square support frame 2.

[0041] As some preferred embodiments of this application, such as Figures 1 to 3 As shown, the lifting and pushing device 3 is a vertically arranged telescopic cylinder, and the cylinder body of the telescopic cylinder is fixedly connected to the support frame 2, and the end of the telescopic rod of the telescopic cylinder abuts against the foundation.

[0042] As some alternative embodiments of this application, the lifting and pushing device 3 can also be selectively configured as a vertically arranged telescopic cylinder, with the telescopic cylinder fixedly connected to the support frame 2, and the end of the cylinder body abutting against the foundation. Alternatively, the lifting and pushing device 3 can be selectively configured as a screw-driven lifting platform, with the support frame 2 connected to the frame 1 via the screw-driven lifting platform. Alternatively, the lifting and pushing device 3 can be selectively configured as a vertically arranged telescopic cylinder, mounted on the frame 1 and located above the support frame 2, with the telescopic end of the cylinder connected to the support frame 2. By configuring the lifting and pushing device 3 as a telescopic cylinder or a screw-driven lifting platform, this application facilitates automated control of the lifting and pushing device 3, better meeting the needs of automated production of prefabricated components.

[0043] When the lifting and pulling device 3 is a telescopic cylinder, the telescopic cylinder is connected with the hydraulic pump and the hydraulic oil tank pipeline through the control valve. Further preferably, the control valve and the hydraulic pump are connected with the control unit and controlled by the control unit, so as to realize the functions of automatic stacking and unstacking.

[0044] As some preferred embodiments of the present application, as shown in Figures 1 to 3 the carrying frame 2 is in the form of a square box. The unstacking and stacking equipment for prefabricated part production includes four lifting and pulling devices 3, and each of the four corners of the carrying frame 2 is connected with one lifting and pulling device 3. By making the carrying frame 2 in the form of a square box and connecting each of the four corners of the carrying frame 2 with one lifting and pulling device 3, the carrying frame 2 can be lifted and lowered under the action of the four lifting and pulling devices 3, and the force on the carrying frame 2 is more uniform, especially meeting the requirements of heavy load.

[0045] As some preferred embodiments of the present application, as shown in Figure 1 and Figure 3 the frame 1 includes four columns 11, and the side of the carrying frame 2 is also provided with a plurality of guide wheel sets 5. Each column 11 is connected with the carrying frame 2 through the guide wheel set 5, and the carrying frame 2 can move along the column 11 in the vertical direction through the guide wheel set 5. The carrying frame 2 is connected with the column 11 through the guide wheel set 5, and the carrying frame 2 can move along the column 11 in the vertical direction through the guide wheel set 5. By connecting the carrying frame 2 with the column 11 through the guide wheel set 5, the carrying frame 2 can more stably and with less resistance realize the lifting function under the action of the guide wheel set 5, so as to better meet the stacking requirements of heavy load molds or mold tables.

[0046] As some preferred embodiments of the present application, as shown in Figure 1 and Figure 3 the column 11 is a square column, and the guide wheel set 5 includes an L-shaped mounting seat. The L-shaped mounting seat is fixedly connected with the carrying frame 2, and the two mutually perpendicular surfaces of the L-shaped mounting seat are respectively provided with a plurality of guide wheels. The L-shaped mounting seat is connected with the two surfaces of the column 11 through the plurality of guide wheels. As some preferred embodiments of the present application, each column 11 is movably connected with the carrying frame 2 through a plurality of vertically spaced guide wheel sets 5. Specifically, as shown in Figure 1 and Figure 3 each column 11 is movably connected with the carrying frame 2 through two vertically spaced guide wheel sets 5. By movably connecting each column 11 with the carrying frame 2 through a plurality of vertically spaced guide wheel sets 5, the column 11 can better constrain and guide the carrying frame 2, effectively improving the carrying capacity of the carrying frame 2, so as to better meet the unstacking and stacking requirements of large prefabricated parts production.

[0047] As some preferred embodiments of the present application, as shown in Figure 1 The preform production unstacking and stacking device comprises four telescopic holding devices 4, which are installed at the bottom of the carrier frame 2, and two telescopic holding devices 4 are arranged at the opposite sides of the mold placing area.

[0048] In the specific implementation, the telescopic holding device 4 can selectively comprise a hydraulic telescopic cylinder 41 and a holding rod 42 connected to the telescopic end of the hydraulic telescopic cylinder 41, and the pneumatic telescopic cylinder is fixedly connected to the bottom of the carrier frame 2. As a convertible embodiment, the hydraulic telescopic cylinder 41 can also be replaced by a pneumatic telescopic cylinder.

[0049] The present application also relates to a preform production line comprising a mold transfer device 6 and the preform production unstacking and stacking device according to any one of the preceding embodiments; the mold transfer device 6 is configured to transfer the mold or mold table into the mold placing area and transfer the mold or mold table out of the mold placing area. In the specific implementation, the preform production line can be used for producing bridge system components and / or the preform production line can be used for producing small preform components.

[0050] It should be noted that the small preform components in the present application are not specifically limited, and they can be any preform components suitable for being produced by using the plurality of molds arranged on the mold table. For example, they can be any small preform components used in the fields of transportation, construction, water conservancy and municipal administration, etc. For example, they can be kerbs, trench cover plates, tunnel cable lines, etc. used in the field of construction; for example, they can be roadbed protection fences, cover plates, fence pieces, slope protection bricks, upright columns, building blocks, etc. used in the field of transportation; for example, they can be cover plates, slope protection bricks, etc. used in the field of water conservancy. It should be further noted that the small preform components defined in the present application are not limited to the above-mentioned small preform components. The small preform components can also be cable grooves, well covers, hollow bricks, drainage grooves, six-edged bricks, cable groove cover plates, fence cover plates, step plates, trench cover plates, protection fences, etc. used in the field of railway transportation.

[0051] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A de-palletizing and palletizing apparatus for preform production, characterized by, The device comprises: a frame, a mold placement area below the frame; a carrier within the frame, the middle of the carrier has a space for accommodating a mold or a mold table; a lifting and pulling device, a plurality of lifting and pulling devices are installed on the carrier, and the plurality of lifting and pulling devices are configured to adjust the vertical position of the carrier; a telescopic holding device, a plurality of telescopic holding devices are arranged on the opposite sides of the carrier, and the telescopic end of the telescopic holding device has a first position extending towards the mold placement area and a second position retracting away from the mold placement area; when the telescopic end of the telescopic holding device is in the first position, it can hold the mold or the mold table; when the telescopic end of the telescopic holding device is in the second position, it can avoid the mold or the mold table.

2. The preform production unstacking and stacking device according to claim 1, wherein the lifting and pulling device is a telescopic cylinder, the telescopic cylinder is vertically arranged, the cylinder body of the telescopic cylinder is fixedly connected with the carrier, and the end of the telescopic rod of the telescopic cylinder abuts against the foundation; or the lifting and pulling device is a telescopic cylinder, the telescopic cylinder is vertically arranged, the telescopic cylinder of the telescopic cylinder is fixedly connected with the carrier, and the end of the cylinder body of the telescopic cylinder abuts against the foundation; or the lifting and pulling device is a telescopic cylinder, the telescopic cylinder is vertically arranged, the telescopic cylinder is installed on the frame and located above the carrier, and the telescopic end of the telescopic cylinder is connected with the carrier; or the lifting and pulling device is a screw rod lifting platform, the carrier is connected with the frame through the screw rod lifting platform.

3. The preform production unstacking and stacking device according to claim 2, wherein the carrier is in the shape of a square frame, the preform production unstacking and stacking device comprises four lifting and pulling devices, and one lifting and pulling device is connected near each corner of the carrier.

4. The preform production unstacking and stacking device according to claim 1, wherein the frame comprises four columns, a plurality of guide wheel sets are further fixed to the side of the carrier, each column is connected with the carrier through the guide wheel set, and the carrier can move along the column in the vertical direction through the guide wheel set.

5. The preform production unstacking and stacking device according to claim 4, wherein the column is a square column, the guide wheel set comprises an L-shaped mounting seat, the L-shaped mounting seat is fixedly connected with the carrier, and a plurality of guide wheels are arranged on the two mutually perpendicular surfaces of the L-shaped mounting seat, and the L-shaped mounting seat is connected with the two surfaces of the column through the plurality of guide wheels.

6. The preform production unstacking and stacking device according to claim 5, wherein each column is movably connected with the carrier through a plurality of vertically spaced guide wheel sets. ​ ​ ​ ​ ​ ​ ​ ​ 7. The preform production unstacking and stacking apparatus according to any one of claims 1 to 6, characterized in that, four of said telescopic holding devices are installed on the bottom of said carrier frame, and two of said telescopic holding devices are arranged on each of the opposite sides of said mold placement area.

8. The preform production unstacking and stacking apparatus according to claim 7, characterized in that, said telescopic holding device comprises a pneumatic telescopic cylinder and a holding rod, said holding rod is connected to the telescopic end of said pneumatic telescopic cylinder, and said pneumatic telescopic cylinder is fixedly connected to the bottom of said carrier frame; or, said telescopic holding device comprises a hydraulic telescopic cylinder and a holding rod, said holding rod is connected to the telescopic end of said hydraulic telescopic cylinder, and said hydraulic telescopic cylinder is fixedly connected to the bottom of said carrier frame.

9. A preform production line characterized by, comprises: the preform production unstacking and stacking apparatus according to any one of claims 1 to 8; and a mold transfer device configured to transfer a mold or mold table into said mold placement area and transfer a mold or mold table out of said mold placement area.

10. The preform production line according to claim 9, characterized in that, said preform production line is used for producing bridge deck members, and / or said preform production line is used for producing small precast members. ​

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