Angle bracket forming unit and forming machine

Abstract

The utility model discloses an angle bracket forming unit and forming machine, wherein the angle bracket forming unit comprises a rack, and a pressing mechanism, a forming mechanism and a jacking mechanism which are sequentially arranged on the rack from top to bottom, the forming mechanism comprises a plurality of clapboards, an angle folding assembly and an edge folding assembly, the clapboards are fixedly arranged in the middle of the rack, and the edge folding assembly is fixedly arranged in the middle of the rack. The partition plates correspond to the long edges of the corner brackets, are arranged in the circumferential direction at intervals and located on the same horizontal plane to define a forming area, corner bracket plate materials are conveyed to the forming area through the downward pressing mechanism, the long edges of the corner brackets are folded and formed under the supporting of the jacking mechanisms, and the corner folding assemblies are located at the two ends of the sides, away from the forming area, of the partition plates correspondingly. And the edge folding assemblies are located below the forming area, are arranged between the adjacent partition plates respectively and are used for carrying out folding forming on the short edges of the corner brackets. The corner supporting plate automatic forming device replaces manual work to conduct automatic forming on corner supporting plate materials, achieves standardized operation, reduces labor intensity of workers, and improves forming efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to packing equipment technical field especially relates to a corner support forming unit and forming machine. BACKGROUND

[0002] The corner support is a kind of packing material, which is composed of a bottom surface and a surrounding barrier perpendicular to the bottom surface. The surrounding barrier is usually formed by folding and gluing multiple long edges and short edges. Currently, large corner supports used in China are generally folded manually, and then glued by spraying hot melt adhesive. Since the corner support is large in size and thick in paperboard, manual folding is labor-intensive, and at least two people are required to cooperate. In addition, each corner box needs two corner supports, one for the top cover and the other for the bottom support. The folding efficiency directly affects the forming efficiency of the overall packaging box. With the development of society and the improvement of automation, it is necessary to develop a corner support forming unit to replace manual work and achieve automatic forming of the corner support. SUMMARY

[0003] The utility model aims at the deficiency of prior art and provides a corner support forming unit and forming machine to replace manual work for automatic forming of the corner support plate material, realize standardized operation, reduce the labor intensity of workers and improve the forming efficiency.

[0004] The technical scheme for achieving the utility model is as follows:

[0005] A corner support forming unit includes a rack, a pressing mechanism, a forming mechanism and a clamping mechanism arranged on the rack from top to bottom. The forming mechanism includes multiple partitions, a corner folding assembly and an edge folding assembly. The partitions are fixedly arranged in the middle of the rack and correspond to the long edges of the corner support. They are arranged in a circumferential gap and located on the same horizontal plane to form a forming area. The corner support plate material is sent to the forming area by the pressing mechanism and folded and formed into a long edge of the corner support under the support of the clamping mechanism. The corner folding assembly is arranged at both ends of the side of the partition away from the forming area to fold and form the long edges of the corner support. The edge folding assembly is arranged below the forming area and between adjacent partitions to fold and form the short edges of the corner support.

[0006] Further, the pressing mechanism includes a lifting machine fixedly arranged on the top of the rack. The bottom lifting end of the lifting machine is detachably fixedly connected with a pressing frame. The pressing frame is fixedly connected with a forming plate assembly and multiple suction cup assemblies. The suction cup assemblies are used to adsorb the corner support plate material. The projection surface of the forming plate assembly is matched with the bottom surface of the corner support.

[0007] Further, the forming plate assembly includes a first pressing plate in the center and multiple long pressing plates corresponding to the partitions one by one. Short pressing plates are arranged between adjacent long pressing plates. The cross sections of the long pressing plates and the short pressing plates are both L-shaped.

[0008] Further, the corner of the forming plate assembly is provided with an ejection assembly, which comprises an ejection cylinder fixed on the pressing frame, and the piston rod of the ejection cylinder is vertically downward and fixed with a pressing block.

[0009] Further, the top of the partition plate is provided with a curved portion extending outward.

[0010] Further, the corner assembly comprises a corner cylinder and a corner plate, the corner cylinder is fixed on the frame, and the piston rod is horizontally arranged, the corner plate comprises a first folding plate and a second folding plate, the first folding plate is L-shaped, the long side is fixed with the piston rod of the corner cylinder, the short side extends to the outside of the end of the partition plate and extends towards the forming area, and the second folding plate is inclined towards the side away from the center of the partition plate and arranged at the end of the short side of the first folding plate.

[0011] Further, the corner assembly comprises a corner cylinder and a corner plate, the corner cylinder is fixed on the frame, and the piston rod is horizontally arranged, the corner plate comprises a first folding plate and a second folding plate, the first folding plate is L-shaped, the long side is fixed with the piston rod of the corner cylinder, the short side extends to the outside of the end of the partition plate and extends towards the forming area, and the second folding plate is inclined towards the side away from the center of the partition plate and arranged at the end of the short side of the first folding plate.

[0012] Further, the top of the corner plate is a smooth circular arc surface.

[0013] Further, the tightening mechanism comprises a mounting plate fixed on the lower part of the frame, the mounting plate is fixed with a lifting cylinder, the piston rod of the lifting cylinder is vertically upward and connected with a horizontally arranged supporting plate assembly, the supporting plate assembly is connected with a guide rod assembly between the mounting plate and is adapted to move to the forming area under the action of the lifting cylinder.

[0014] Further, it also comprises a glue spraying assembly and a pressing assembly, the glue spraying assembly is provided with a plurality of and respectively located between adjacent partition plates, the glue spraying assembly comprises a moving module, a clamping seat and a glue spraying gun, the moving module is fixed on the frame, the glue spraying gun is fixed on the sliding block of the moving module through the clamping seat, and the pressing assembly comprises a pressing cylinder fixed below the moving module, the piston rod of the pressing cylinder is horizontally arranged and fixed with a pressing plate, and the pressing plate is opposite to the short side of the corner supporting.

[0015] An angle bracket forming machine comprises the angle bracket forming unit according to any one of the preceding claims and a pair of angle bracket table for temporarily stacking the angle bracket blanks, one side of the angle bracket forming unit is provided with a positioning table, and the other side is provided with a blanking conveyor extending directly below the forming area, the side edge of the positioning table is provided with a feeding conveyor extending between the two angle bracket tables, the feeding conveyor is provided above with a material taking truss movably arranged in the horizontal direction, the material taking truss spans the two angle bracket tables and is suitable for transferring the angle bracket blanks to the feeding conveyor, and a feeding truss extending to the angle bracket forming unit is arranged above the positioning table and is suitable for feeding the angle bracket blanks on the positioning table directly below the pressing mechanism.

[0016] By adopting the technical scheme, the utility model has the advantages of the following:

[0017] (1) The utility model discloses a supporting mechanism, a downward movement of the angle bracket blank is realized by the adsorption of the pressing mechanism and the feeding to the forming area surrounded by the partition plate, the long side folding forming of the angle bracket is realized, then the end angle and the short side of the long side are folded and formed by the corner folding assembly and the edge folding assembly respectively, the automatic folding forming of the angle bracket is completed, the standardization operation is realized, the labor intensity of workers is reduced, and the forming efficiency is improved.

[0018] (2) The utility model discloses a pressing mechanism, the lifting frame drives the lifting movement of the pressing frame, the angle bracket blank is adsorbed by the suction cup assembly, so as to drive the up-down lifting, and the angle bracket blank is pressed to the forming area by the forming plate assembly matched with the shape of the angle bracket, so that the long side automatic forming is completed under the guidance of the partition plate.

[0019] (3) The utility model discloses a setting ejecting assembly, when the forming plate assembly presses the angle bracket blank, the pressing block extends, the corners around the angle bracket are pressed tightly, the corners of the forming plate assembly are prevented from being bent and deformed upward due to the large stress, the forming effect is influenced, meanwhile, the auxiliary function is realized when the suction cup assembly breaks the vacuum, the quick separation of the angle bracket and the suction cup assembly is realized.

[0020] (4) The utility model discloses a partition plate, the top of the partition plate is outwardly curved, the upper part of the forming area forms the horn mouth that expands outward, the angle bracket blank is more convenient to be pressed to the forming area.

[0021] (5) The utility model discloses a corner folding cylinder, the corner folding plate is pushed close to the partition plate by the corner folding cylinder, the end angle of the long side of the angle bracket is folded by the short side of the second folding plate and the first folding plate, when the long side of the first folding plate is close to the partition plate, the short side completes the folding of the end angle, the setting of the second folding plate can avoid the short side scratching the angle bracket, reduces the risk of breakage, and the structure is simple.

[0022] (6) The utility model discloses an edge folding cylinder, the edge folding plate is pushed to lift by the edge folding cylinder, so that the short side of the angle bracket is folded upward from below.

[0023] (7)The utility model discloses a top of the edge folding plate is designed as the smooth arc surface, effectively protects the corner support, avoids scratching the corner support surface in the process of being lifted up, improves the yield.

[0024] (8)The utility model discloses a jacking mechanism realizes the lifting of the support plate assembly through the jacking cylinder, and thus is lifted when the corner support is formed, and plays a supporting role.

[0025] (9)The utility model discloses a top of the edge folding plate is designed as the smooth arc surface, effectively protects the corner support, avoids scratching the corner support surface in the process of being lifted up, improves the yield.

[0026] (10)The utility model discloses a forming machine adopts the corner support forming unit that can fold the corner support plate material automatically, cooperates automatic feeding and discharging, and removes the manual handling process, further reduces the labor intensity of workers, and improves the forming efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to make the content of the utility model more easily be clearly understood, the following is according to specific embodiment and combining with the attached drawing, and the utility model is further detailed, wherein:

[0028] Figure 1 It is the structure schematic diagram of the utility model forming machine;

[0029] Figure 2 It is the structure schematic diagram of the utility model forming unit;

[0030] Figure 3 It is the structure schematic diagram of the utility model corner folding assembly;

[0031] Figure 4 It is the structure schematic diagram of the utility model glue spraying assembly;

[0032] Figure 5 It is the structure schematic diagram of the utility model edge folding assembly;

[0033] Figure 6 It is the structure schematic diagram of the utility model pressing assembly;

[0034] Figure 7 It is the structure schematic diagram of the utility model jacking mechanism;

[0035] Figure 8 It is the structure schematic diagram of the utility model corner support;

[0036] The sign in the attached drawing is:

[0037] Angle support platform 100, positioning platform 200, unloading conveyor 300, loading conveyor 400, material picking truss 500, material feeding truss 600;

[0038] Frame 1, Pressing Mechanism 2, Lifting Platform 2-1, Pressing Frame 2-2, Forming Plate Assembly 2-3, Suction Cup Assembly 2-4, Ejection Assembly 2-5, Tightening Mechanism 3, Mounting Plate 3-1, Lifting Cylinder 3-2, Support Plate Assembly 3-3, Guide Rod Assembly 3-4, Partition Plate 4, Corner Folding Assembly 5, Corner Folding Cylinder 5-1, Corner Folding Plate 5-2, First Folding Plate 5-2-1, Second Folding Plate 5-2-2, Edge Folding Assembly 6, Edge Folding Cylinder 6-1, Edge Folding Plate 6-2, Glue Spraying Assembly 7, Moving Module 7-1, Clamping Seat 7-2, Glue Spraying Gun 7-3, Pressing Assembly 8, Pressing Cylinder 8-1, Pressing Plate 8-2. Detailed Implementation

[0039] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0040] (Example 1)

[0041] like Figures 1 to 7 The corner support forming machine shown includes a corner support forming unit, a corner support platform 100, a positioning platform 200, a feeding conveyor 300, a feeding conveyor 400, a picking gantry 500, and a feeding gantry 600. A pair of corner support platforms 100 are symmetrically arranged on both sides of the feeding conveyor 400. The positioning platform 200 is located on the right side of the corner support forming unit and connects to the outlet of the feeding conveyor 400. The picking gantry 500 is erected above the feeding conveyor 400 and is horizontally movable, spanning the two corner support platforms 100. It then delivers the stacked corner support plates temporarily stored on the corner support platforms 100 to the feeding conveyor 400, and from there to the positioning platform 200, where the positioning platform 200 adjusts the corner support plates. The material handling truss 500 is mounted on the positioning platform 200, and its left end extends to the corner support forming unit, thereby sending the adjusted corner support plate material to the corner support forming unit for automatic forming. The corner support forming unit is provided with a forming area. The material unloading conveyor 300 is located on the left side of the corner support forming unit and extends directly below the forming area, and is used to transport the formed corner support to the next process.

[0042] This embodiment uses the corner bracket forming of an octagonal box as an example to illustrate the structure of the corner bracket forming unit. The corner bracket of the octagonal box is as follows: Figure 8As shown, the corner bracket forming unit comprises a rack 1, a pressing mechanism 2, a forming mechanism and a clamping mechanism 3 arranged on the rack 1 from top to bottom, and the forming mechanism comprises a partition plate 4, a corner folding assembly 5 and an edge folding assembly 6. The four partition plates 4 are uniformly spaced along the circumference, are fixed in the middle of the rack, correspond to the long edges of the corner bracket and are located in the same horizontal plane, thereby forming a forming area, and the corner bracket blank is sent to the forming area by the pressing mechanism 2 and the long edges of the corner bracket are folded and formed under the support of the clamping mechanism 3. The corner folding assembly 5 is provided with eight in total four pairs, which are respectively located at both ends of the side away from the forming area of the partition plate, and are used for folding and forming the long edges of the corner bracket; the gap between the adjacent partition plates 4 corresponds to the short edges of the corner bracket, and the edge folding assembly 6 is also provided with four, which are all located below the forming area and are respectively arranged between the adjacent partition plates, and are used for folding and forming the short edges of the corner bracket.

[0043] Specifically, the pressing mechanism 2 comprises a lifting machine 2-1 fixed on the top of the rack 1, and the bottom lifting end of the lifting machine 2-1 is detachably fixed with a pressing frame 2-2 through bolt connection, and the pressing frame 2-2 is fixed with a forming plate assembly 2-3 and a plurality of suction cup assemblies 2-4, the corner bracket blank is adsorbed by the suction cup assembly 2-4, and the corner bracket blank is sent to the forming area under the driving of the lifting machine 2-1.

[0044] The projection surface of the forming plate assembly 2-3 is matched with the bottom surface of the corner bracket, and comprises a first pressing plate in the center and a plurality of long pressing plates corresponding to the partition plates one by one, and a short pressing plate is arranged between the adjacent long pressing plates, and the cross sections of the long pressing plate and the short pressing plate are both L-shaped, so that when the corner bracket blank enters the forming area, the long edges of the corner bracket are folded and formed by cooperating with the partition plates 4. In order to make the corner bracket blank more easily enter the forming area, the top of the partition plate 4 of the embodiment is provided with a curved portion extending outward. At the same time, considering that the corner of the forming plate assembly 2-3 is relatively large in stress, in order to avoid deformation caused by long-term use, the embodiment is provided with an ejection assembly 2-5 at the corner of the forming plate assembly 2-4, the ejection assembly 2-5 comprises an ejection cylinder fixed on the pressing frame 2-2, the piston rod of the ejection cylinder is vertically downward and is fixed with a pressing block, when the forming plate assembly 2-4 presses the corner bracket blank, the pressing block is extended, the corners around the corner bracket are pressed tightly, the deformation is prevented, the forming effect of the corner bracket is affected, and at the same time, the ejection assembly 2-5 can play an auxiliary role when the suction cup assembly 2-4 breaks the vacuum, and the corner bracket and the suction cup assembly 2-4 are quickly separated.

[0045] The corner folding assembly 5 comprises a corner folding cylinder 5-1 and a corner folding plate 5-2. The corner folding cylinder 5-1 is fixed on the frame 1, and the piston rod is horizontally arranged. The corner folding plate 5-2 comprises a first folding plate 5-2-1 and a second folding plate 5-2-2 which are integrally formed. The first folding plate 5-2-1 is L-shaped, and the long side is fixedly connected with the piston rod of the corner folding cylinder 5-1. The short side extends to the outside of the end of the partition plate 4 and extends towards the forming area. The second folding plate 5-2-2 is inclined towards the side away from the center of the partition plate and is arranged at the end of the short side of the first folding plate 5-2-1. The corner folding plate 5-2 is pushed close to the partition plate 4 by the corner folding cylinder 5-1, and the end corners of the long side are folded by the second folding plate 5-2-2 and the short side of the first folding plate 5-2-1. When the long side of the first folding plate 5-2-1 is close to the partition plate, the folding of the end corners of the short side is completed. The arrangement of the second folding plate 5-2-2 can avoid scratching the corner holder by the short side and reduce the risk of damage. Moreover, the structure is simple.

[0046] The edge folding assembly 6 comprises an edge folding cylinder 6-1 fixed on the frame 1. The piston rod of the edge folding cylinder 6-1 is vertically arranged upwards and is fixedly connected with an edge folding plate 6-2. The edge folding plate 6-2 is L-shaped, and the short side is fixedly connected with the piston rod of the edge folding cylinder 6-1. The long side is vertically arranged upwards. The edge folding plate 6-2 is pushed up and down by the edge folding cylinder 6-1, so that the short side of the corner holder is folded upwards from below the corner holder. Considering that the top of the edge folding plate 6-2 is easy to scratch the corner holder, the top of the edge folding plate 6-2 is arranged as a smooth circular arc surface in this embodiment.

[0047] In order to further improve the automation, the forming mechanism of this embodiment further comprises four groups of glue spraying assemblies 7 and pressing assemblies 8. The glue spraying assemblies 7 are respectively arranged between adjacent partition plates. Each glue spraying assembly 7 comprises a moving module 7-1, a clamping seat 7-2 and a glue spraying gun 7-3. The moving module 7-1 is fixed on the frame 1. The glue spraying gun 7-3 is fixed on the sliding block of the moving module 7-1 through the clamping seat 7-2. The pressing assembly 8 comprises a pressing cylinder 8-1 fixed below the moving module 7-1. The piston rod of the pressing cylinder 8-1 is horizontally arranged and is fixedly connected with a pressing plate 8-2. The pressing plate 8-2 is opposite to the short side of the corner holder. After the edge folding assembly 6 completes the folding of the long side end corners of the corner holder, the long side end corners of the corner holder are sprayed by the moving glue spraying gun 7-3, and then the short side of the corner holder is folded by the edge folding assembly 6. Finally, the short side of the corner holder and the end corners coated with glue are pressed by the pressing assembly, so as to realize automatic sticking. The folding forming and glue spraying are combined, the automation degree is higher, and the overall packaging efficiency is improved.

[0048] The jacking mechanism 3 comprises a mounting plate 3-1 fixed to the lower part of the frame 1, a jacking cylinder 3-2 fixed to the mounting plate 3-1, a piston rod of the jacking cylinder 3-2 being arranged vertically upward and connected with a horizontally arranged supporting plate assembly 3-3, a guide rod assembly 3-4 being connected between the supporting plate assembly 3-3 and the mounting plate 3-1, the supporting plate assembly 3-3 being driven to ascend and descend by the jacking cylinder 3-2, thereby ascending to support when the corner bracket is formed and descending to reset after the corner bracket is formed. The corner bracket is covered on the forming plate assembly after being formed, at this time, the ejection assembly ejects the corner bracket, and the corner bracket naturally falls on the lower blank conveyor 300, the blank conveyor 300 being a chain conveyor, a projection of the supporting plate assembly 3-3 being smaller than a spacing between two chains of the chain conveyor, so that the supporting plate assembly 3-3 freely passes through and is conveyed on the conveying plane, and the formed corner bracket is conveniently transferred to the blank conveyor 300 under the action of the jacking cylinder.

[0049] The jacking mechanism 3 is used as a support, the corner bracket plate material is moved downward and sent to the forming area surrounded by the partition plate 4 by the pressing mechanism 2, the long side folding forming of the corner bracket is realized, then the end corner of the long side is folded and formed by the corner folding assembly 5, and is automatically sprayed by the glue spraying assembly 7, the short side folding of the corner bracket is realized by the edge folding assembly 6, and finally the pressure maintaining assembly 8 is used for pressure maintaining, the automatic folding forming and gluing of the corner bracket are completed, the standardized operation is realized, the automatic feeding and discharging are matched, the manual carrying process is saved, the labor intensity of workers is further reduced, and the forming efficiency is improved.

[0050] The above-described specific embodiments further specifically describe the purpose, technical scheme and beneficial effects of the utility model, and it should be understood that the above-described specific embodiments are only specific embodiments of the utility model and are not used for limiting the utility model, and any modification, equivalent replacement, improvement and the like within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A corner bracket forming unit, characterized by: The application relates to a machine for folding and forming an angle support, which comprises a rack and a lower pressing mechanism, a forming mechanism and a tightening mechanism arranged on the rack from top to bottom, the forming mechanism comprises a plurality of partitions, an angle folding assembly and an edge folding assembly, the partitions are fixedly arranged in the middle of the rack and correspond to the long edges of the angle support, are arranged in a circumferential gap and are located in the same horizontal plane, and form a forming area, the angle support is sent to the forming area by the lower pressing mechanism and the long edges of the angle support are folded and formed under the support of the tightening mechanism, the angle folding assembly is arranged at the two ends of the side of the partition away from the forming area, and is used for folding and forming the two ends of the long edge of the angle support, and the edge folding assembly is arranged below the forming area and is arranged between the adjacent partitions, and is used for folding and forming the short edge of the angle support.

2. A corner bracket forming unit according to claim 1, characterized in that: The lower pressing mechanism comprises a lifting machine fixedly arranged on the top of the rack, the bottom lifting end of the lifting machine is detachably fixedly connected with a lower pressing frame, a forming plate assembly and a plurality of suction disc assemblies are fixedly arranged on the lower pressing frame, the suction disc assemblies are used for adsorbing the angle support, and the projection surface of the forming plate assembly is matched with the bottom surface of the angle support.

3. A corner bracket forming unit according to claim 2, characterised in that: A ejection assembly is arranged at the corner of the forming plate assembly, the ejection assembly comprises an ejection air cylinder fixedly arranged on the lower pressing frame, the piston rod of the ejection air cylinder is vertically arranged downwards and is fixedly connected with a pressing block.

4. A corner bracket forming unit according to claim 1, characterized in that: The top of the partition is provided with a curved portion extending outwards.

5. A corner bracket forming unit according to claim 1, characterized in that: The angle folding assembly comprises an angle folding air cylinder and an angle folding plate, the angle folding air cylinder is fixedly arranged on the rack, the piston rod is horizontally arranged, the angle folding plate comprises integrally-formed first and second folding plates, the first folding plate is L-shaped, the long edge is fixedly connected with the piston rod of the angle folding air cylinder, the short edge extends to the outside of the end of the partition and extends towards the forming area, and the second folding plate is arranged at the short edge end of the first folding plate and inclines towards the side away from the center of the partition.

6. A corner bracket forming unit according to claim 1, characterized in that: The edge folding assembly comprises an edge folding air cylinder fixedly arranged on the rack, the piston rod of the edge folding air cylinder is vertically arranged upwards and is fixedly connected with an edge folding plate, the edge folding plate is L-shaped, the short edge is fixedly connected with the piston rod of the edge folding air cylinder, and the long edge is vertically arranged upwards.

7. A corner bracket forming unit according to claim 6, characterised in that: The top of the edge folding plate is a smooth circular arc surface.

8. A corner bracket forming unit according to claim 1, characterized in that: The tightening mechanism comprises a mounting plate fixedly arranged on the lower part of the rack, the mounting plate is fixedly connected with a lifting air cylinder, the piston rod of the lifting air cylinder is vertically arranged upwards and is connected with a horizontally arranged supporting plate assembly, a guide rod assembly is arranged between the supporting plate assembly and the mounting plate and is adapted to move to the forming area under the action of the lifting air cylinder.

9. A corner bracket forming unit according to claim 1, characterized in that: The machine further comprises a glue spraying assembly and a pressing assembly, the glue spraying assembly is arranged between the adjacent partitions, the glue spraying assembly comprises a moving module, a clamping seat and a glue spraying gun, the moving module is fixedly arranged on the rack, the glue spraying gun is fixedly arranged on the sliding block of the moving module through the clamping seat, the pressing assembly comprises a pressing air cylinder fixedly arranged below the moving module, the piston rod of the pressing air cylinder is horizontally arranged and is fixedly connected with a pressing plate, and the pressing plate faces the short edge of the angle support.

10. A corner bracket forming machine characterized by: The application relates to a corner bracket forming unit as claimed in any one of claims 1 to 9 and a pair of corner bracket tables for temporarily stacking corner bracket blanks, one side of the corner bracket forming unit being provided with a positioning table, the other side being provided with a blanking conveyor extending directly below the forming area, the side of the positioning table being provided with a feeding conveyor extending between the two corner bracket tables, a horizontally movable material taking gantry being arranged above the feeding conveyor, the material taking gantry extending across the two corner bracket tables and being adapted to transfer the corner bracket blanks to the feeding conveyor, a feeding gantry extending above the positioning table and being adapted to feed the corner bracket blanks on the positioning table directly below the pressing mechanism being arranged above the corner bracket forming unit.

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