CN108688224B - Carton extrusion forming device - Google Patents

Abstract

The invention discloses a carton extrusion forming device which comprises a forming die, an extrusion die and a lifting assembly, wherein a forming area is arranged in the forming die, the extrusion die is arranged on the lifting assembly, and the extrusion die extends into the forming area of the forming die through the lifting assembly. The carton extrusion forming device is provided with two stations to meet the forming requirements of cartons with different specifications, and the size of a forming area of each station is adjustable, so that a forming structure suitable for forming cartons with more specifications can be obtained by adjusting in advance; meanwhile, the extrusion die has a variable operation structure, the space which is favorable for the extrusion die to separate from the paperboard can be enlarged after the paperboard is bent, the technical effect that the extrusion die smoothly separates from the bent paperboard is realized, and the extrusion die is convenient to be matched with a forming die to adapt to the use requirement of forming of cartons with more specifications.

Description

Carton extrusion forming device

Technical Field

The invention relates to a technical scheme for producing a carton by extruding sheet-shaped paperboards, in particular to a carton extrusion forming device.

Background

The packaging function of the carton is derived from its closed or semi-closed structure which benefits from the structure of the carton from which the carton is made, namely the paperboard, including crease structures and crease placement designs, and leaf structures and leaf placement designs. From paperboard with a particular structure to formed cartons, it is known in the art to produce cartons in a bent manner. The power required for bending can be the swinging movement of the mechanical components and also the relative dislocation movement of the mechanical components. The relative misalignment movement of the common mechanical components is embodied as a compression of the cardboard.

The equipment required by the extrusion forming process of the carton comprises a forming die and power equipment for driving the die to move, and the die is divided into a forming die and an extrusion die. For example, a forming die suitable for forming the carton is provided with a forming area in the middle, and the cross section of the forming area is rectangular, for example, a patent with application number 201410261799x published on 10.1.2014 discloses a packing box folding device, and the technical scheme of extrusion forming of the carton is disclosed in the patent document. In the technical scheme, the forming area is composed of ten positioning blocks fixedly arranged on the rack, the surfaces of the positioning blocks are provided with two structures, one is a plane positioned in a vertical plane, and the other is an arc surface inclined with the vertical plane, so that the surfaces of the positioning blocks form a surface with a structure with guiding and limiting functions. When the carton box is used, only the paperboard provided with the crease lines and the notches is placed above the forming area, then the pressing plate forcibly presses the paperboard, and finally the paperboard is placed at the bottom of the forming area to finish the conversion from the paperboard to the carton box.

In view of the technical solutions of the prior art, it is not difficult to find that the structures used to form the forming area are all fixed structures fixed to the mechanism or combined with the assembly, that is, the size of the forming area is not adjustable in the prior art.

The reason why the forming area in the carton extrusion forming technology is not adjustable is that the specifications of the materials and the packing boxes packaged in batches on the production line in the packaging field do not need to be changed frequently, for example, in a packaging line for dairy products, the size of the smallest packaging unit of the dairy products, namely bottles/milk bags, is not updated for a long time (if updated, the filling equipment, the conveying equipment, the gripping equipment and the like are completely replaced or redesigned, so that when the updating is needed, the redesigned manufacturing mode is adopted in the prior art to meet the production requirement, the best time effect and the lowest production cost are met for the industrial production requirement), and the secondary carton packaging machine for packaging the dairy products does not need to be updated frequently under the existing working standard of storage, transportation and sale. This makes existing packaging lines based on stable operation objects and stable operation requirements at the beginning of the design, resulting in no adjustment function for the devices/parts/assemblies on the line; in this way, when the packaging production line is matched with the carton extrusion forming equipment, only the carton extrusion forming equipment can meet the production of cartons of one specification, so that the structure forming the forming area in the prior art is fixed with a mechanism or fixed by combining components.

The shape and size of the pressing plate correspond to the structure of an operation object, the paper plate is pressed to promote the paper plate to form bending operation at the crease, the part of the paper plate receiving acting force is a part close to the crease, and thus the structure of the pressing plate is the same as the shape of the stressed part of the paper plate, and the size of the stressed part formed on the paper plate by the contact of the pressing plate and the paper plate is slightly smaller than the size of the main body of the stressed part of the paper plate. Taking the technical solution in the prior art as an example, the operation object is a paper sheet, that is, a paper board, including an area a, an area B, an area C, and an area D, the area D is rectangular, and a pressing plate corresponding to the area D and acting on the area D is also rectangular, but the size of the pressing plate is slightly smaller than that of the rectangular structure of the area D. The size that the pressboard is less than the size of the atress position place main part of cardboard slightly, because the space between pressboard and locating piece can be shifted and fill in the position of buckling of cardboard, if the size of the main part at the atress position place of pressboard is the same with the cardboard, the size in pressboard size and D district is the same promptly, the crease position of carton probably receives obvious shearing force in extrusion process, then the extrusion cardboard process is not different from cutting the cardboard.

The problem that the bent part of the paperboard is clamped between the pressing plate and the positioning block often occurs after bending, and the reason is that the distance between the pressing plate and the positioning block after extrusion is smaller than the thickness of the paperboard. This problem further causes the pressing plate not to be separated from the bent and formed carton, and the carton cannot be conveyed in a predetermined manner by the equipment in the next step. Although this problem can be solved by reducing the size of the pressing plate or enlarging the size of the forming area, the problem of poor bending and poor carton forming effect is caused at the same time. Therefore, even if the problem of paper jam is solved by adjusting the distance between the pressing plate and the positioning block in advance in the prior art, other negative technical problems still occur.

In summary, the forming area of the forming die in the prior art is not adjustable and the pressing plate structure is fixed, so that the application range of the existing carton extrusion forming device is very limited.

Disclosure of Invention

The invention aims to solve the technical problem of how to enlarge the application range of a carton extrusion forming device, thereby obtaining the carton extrusion forming device with wide application range.

In order to solve the technical scheme, the invention adopts the following technical scheme: carton extrusion forming device is including forming die, extrusion die and lifting unit, be equipped with the shaping region in the forming die, extrusion die installs on lifting unit, extrusion die stretches into forming die's shaping region through lifting unit in, forming die includes mounting bracket and two adjustable shaping parts, shaping parts all installs on the mounting bracket, the mounting bracket includes two sharp sliding platform, shaping parts includes two shaping units, and two shaping units are installed respectively on two sharp sliding platform, are in parallel state between two sharp sliding platform and each other with sharp slip mode swing joint and adjust the distance between two shaping units, shaping unit includes two movable mould and a fixed mould, movable mould movable mounting is on sharp sliding platform and sharp sliding platform drive movable mould is linear motion and adjusts the distance between two movable mould The extrusion die comprises a support, a power unit, a main transmission piece, a sub transmission piece and an opening and closing unit, wherein the power unit, the main transmission piece, the sub transmission piece and the opening and closing unit are all arranged on the support, the support is connected with a lifting assembly, the opening and closing unit at least comprises four forming plates which synchronously move in a swinging mode, one end of each forming plate is movably connected with the support, the swinging directions of any two adjacent forming plates are mutually vertical, and the main transmission piece is arranged on a power output end of the power unit and reciprocates in a linear mode, one end of the sub-transmission piece is movably connected with the main transmission piece, the other end of the sub-transmission piece is movably connected with the other end of the forming plate, and a condensation gap is arranged between every two adjacent forming plates.

The forming die is an assembly of a plurality of parts, and two forming areas are arranged on the forming die. The forming area is composed of two forming units which are opposite in position, and each forming unit is respectively arranged on two linear sliding platforms; the two linear sliding platforms can be close to or far away from each other, so that the distance between the two forming units can be adjusted, and the purpose that the forming area can be adjusted in one direction is achieved. The two movable dies of each forming unit can slide on the linear sliding platform, and the distance between the two movable dies is adjustable, so that the purpose that the forming area is adjustable in the direction vertical to the adjustable direction is achieved. Thereby, the four movable dies in any one of the formed parts are adjustable in two mutually perpendicular directions, eventually making each forming area adjustable.

Two forming areas are provided on the forming die. Not only can set up two shaped area as unidimensional, can also set up two shaped area as not unidimensional, two not unidimensional shaped area can be applicable to the carton shaping demand of two kinds of sizes.

In the technical scheme, the adjustable range of the forming die is comprehensively expanded by the technical scheme that a single forming area is adjustable and the technical scheme that two adjustable forming areas are matched for use. In the technical scheme, the adjustability of a single forming area is a basic factor for expanding the application range, the matching use of two adjustable forming areas is a promoting factor for expanding the application range, and the consistency of the adjustable range and the adjustment brought by the superposition of the two adjustable forming areas is optimal.

It is clear that the carton extrusion molding apparatus can exert the advantage of high production efficiency in addition to the advantage of adjustable range when the two molding areas are the same size. However, such an arrangement does not provide the greatest advantage of the solution according to the invention in case of capacity, in particular in case of an excessive capacity, i.e. in case of a single forming area of the forming tool meeting the production requirements. Therefore, the optimal configuration in the technology is to set the size of one forming area to be different from that of the other forming area, and on the basis of the optimal configuration, the adjustable range can be maximized and the technical effect of continuous adjustment can be realized.

After the opening and closing unit is driven, all the forming plates can synchronously move with the fixed swinging characteristic, and then the opening and closing unit shows the unfolding and the condensation actions. In the unfolded state, adjacent forming plates are separated; in the condensed state, the spacing between adjacent forming plates is reduced until they are connected to each other. The condensation gap changes its spatial structure according to the expansion and contraction operations, but always exists due to the structural feature that the adjacent forming plates are not integrated, and only the width of the condensation gap in the expanded state is larger than the width of the condensation gap in the condensed state. The power source for driving the opening and closing unit to work is an automatic power unit, the power unit can adopt one of an air cylinder, an oil cylinder and an electric cylinder in the technical scheme, and the power output characteristic of the automatic power unit is that a part which moves linearly is taken as a power output end, so that the power output in the linear direction is ensured. The power output to drive the forming plate to move also needs a transmission structure consisting of a main transmission piece and a sub transmission piece to convert the power. Based on this structure, both the power generation direction and the transmission direction can be matched with the arrangement and movement of the forming plate, thereby achieving a compact overall structure and a wide swing range of the forming plate. Therefore, the extrusion die is small in size and large in deformation range.

When the extrusion die is used, the opening and closing unit is in an unfolded state, and the surfaces of any two adjacent forming plates are vertical to each other; after the extrusion action is finished, the opening and closing unit is in a condensation state, the forming plates swing towards the inside of the support, the distance between the forming plates and the forming die in the forming area is enlarged, and therefore the forming plates are enabled to be separated from the bent paperboard actively. That is, in the present embodiment, the idea is to enlarge the distance between the forming plate and the forming die after the bending operation is completed, that is, to enlarge the distance afterwards. Therefore, the defect caused by the fact that the distance is enlarged in advance is avoided, and the extrusion die is smoothly separated from the carton after extrusion is completed.

The forming area of the forming die is adjustable, the structure of the extrusion die is variable, and based on the comprehensive technical means, the space occupied by the bent paperboard can be adjusted according to the condition of the paperboard, for example, the size of the forming area is adjusted in advance according to the thickness, the toughness, the bending structure and the like of the paperboard; the extrusion die generates structural change of the paperboard which is convenient to break away from the bent paperboard afterwards so as to adapt to the forming requirements of different paperboards. Therefore, the problem of small application range of the carton extrusion forming device is thoroughly solved.

In the technical scheme, the consistency of adjustment can be further improved, namely, two technical means of independent adjustment of the forming areas are adopted. Two separated and independently moving screw rods which are positioned on the same central line are arranged on the linear sliding platform, one screw rod is movably connected with two movable dies of one forming unit of one forming part, and the other screw rod is movably connected with two movable dies of one forming unit of the other forming part. Since the two forming sections are mounted on two linear sliding platforms, the two forming areas can only achieve the technical effect of being independently adjustable in one of the directions, but this is sufficient to promote the consistency of the adjustment.

The limiting effect of the forming unit on the cardboard arises from the binding relationship being constrained upon contact, which benefits from the working surface of the forming unit. The operation surface is reasonably distributed, so that the production and the processing are convenient, and the function of protecting the outer surface of the carton can be realized. In the technical scheme, the preferable scheme of the operation surface is that the movable mould is provided with two limit surfaces which are vertical to each other, the fixed mould is provided with the limit surfaces, one of the limit surfaces of the movable mould and the limit surface of the fixed mould are positioned in the same plane in the same forming unit, and one limit surface of one movable mould and one limit surface of the other movable mould in the two movable moulds which are positioned at opposite positions in the same forming part are positioned in the same plane. All the limiting surfaces form an operation surface of the forming unit together, the limiting surfaces are discrete mechanisms which are not integrated structures and serve the same operation purpose together on the functional level, and the discrete design can well play roles in maintaining parts, adjusting parts and upgrading the structure; and the design of the discrete structure can be completely matched with the technical characteristics of adjustable forming areas of the forming units, and if the discrete structure is an integral structure, the adjustable function of the discrete structure is necessarily inhibited or even can not be realized.

The spatial position of the adjustable range of the forming area should be fixed, i.e. the adjustable range is fixed relative to a certain spatial position. In the technical scheme, the adjustable range of the forming area is arranged around the fixed die, namely, the two movable dies of the forming unit can synchronously and reversely move by taking the fixed die as the center. The space where the adjustable range of the forming area is arranged in the middle of the mounting frame, so that the compact structure can be designed.

In an extrusion die, the width of the condensation gap is one of the factors that affect the range of motion of the forming plate, and factors that affect the width of the condensation gap include edge structure from the forming plate. For this purpose, the forming plates are preferably configured such that the cross section of the forming plates is an isosceles trapezoid, inclined surfaces are provided on both sides of the forming plates, the inclined surface on one side of one forming plate of any two adjacent forming plates is opposite to the inclined surface on one side of the other forming plate, and the condensation gap is located between the two opposite inclined surfaces. The edges of the forming plates are arranged into an inclined surface structure, so that on one hand, the condensation gap can be enlarged to the maximum extent, and on the other hand, a self-locking effect can be achieved, namely, a mutual constrained connection relation is generated among the four forming plates, so that the forming plates can be kept in a stable spatial posture in a condensation state, and the problem that the forming plates deviate in a continuous stress state is avoided.

The extrusion die is used for extruding the paperboard on the forming die, the stressed part of the paperboard is closely related to the distribution of the forming plates when the paperboard is extruded, and the distribution of the forming plates determines the outline of the stressed part. Due to the annular distribution of the forming plates, the force-receiving portions are limited to local positions within the rectangular area enclosed by the forming plates, since the force-receiving portions can only be formed at the contact portions in the case where only the forming plates are in contact with the sheet. In order to enlarge the contact position, the extrusion die further comprises a positioning unit, wherein the positioning unit comprises a positioning plate and a sucking disc, the positioning plate and the sucking disc are fixedly arranged on the support, and the sucking disc penetrates through the positioning plate and protrudes out of the surface of the positioning plate. In the unfolded state, the surface of the positioning plate is flush with the tail end of the forming plate, and the positioning plate and the forming plate participate in the extrusion operation together during the extrusion operation. With the sucking disc, the fixed connection relation with the paperboard can be established through the sucking disc when the extrusion die just contacts the paperboard, and the relative position relation between the paperboard and the extrusion die is fixed.

The invention adopts the technical scheme that: the carton extrusion forming device is provided with two stations to meet the forming requirements of cartons with different specifications, and the size of a forming area of each station is adjustable, so that a forming structure suitable for forming cartons with more specifications can be obtained by adjusting in advance; meanwhile, the extrusion die has a variable operation structure, the space which is favorable for the extrusion die to separate from the paperboard can be enlarged after the paperboard is bent, the technical effect that the extrusion die smoothly separates from the bent paperboard is realized, and the extrusion die is convenient to be matched with a forming die to adapt to the use requirement of forming of cartons with more specifications.

Drawings

Fig. 1 is a front view of a forming die of a carton extrusion forming device of the present invention;

fig. 2 is a perspective view of a forming die of the carton extrusion forming device of the present invention;

FIG. 3 is a perspective view of an extrusion die of the carton extrusion molding apparatus of the present invention;

FIG. 4 is a perspective view II of an extrusion die of the carton extrusion molding apparatus of the present invention;

fig. 5 is a schematic view of the internal structure of an extrusion die of the carton extrusion molding device of the present invention;

fig. 6 is a schematic structural view of a condensed state of an opening and closing unit of an extrusion die of the carton extrusion molding device according to the present invention.

Detailed Description

The carton extrusion forming device comprises a forming die, an extrusion die and a lifting assembly. Extrusion die installs on lifting unit, lifting unit includes the mounting bracket, synchronous pulley, servo motor, the reduction gear, the hold-in range, linear guide, the slip table, install two synchronous pulley on the mounting bracket, the hold-in range is installed on synchronous pulley, servo motor passes through the reduction gear and installs on the mounting bracket, servo motor's pivot and the power input shaft of reduction gear, the power output shaft and one of them synchronous pulley of reduction gear are connected, be provided with two linear guide on the mounting bracket, slip table both ends and two linear guide difference sliding connection, the slip table expandes with the hold-in range and is straight form position fixed connection. So, after servo motor drive hold-in range rotated, the slip table can be along linear guide is straight reciprocating motion.

As shown in fig. 1 and 2, the forming die is provided with a mounting frame on which two forming members are mounted.

The mounting frame comprises two linear sliding platforms. Each linear sliding table comprises a supporting block I1, a supporting block II 2, a guide rod I3, a guide rod II 4, a screw rod I5, a screw rod II 6, a handle I and a handle II. The supporting block I1 and the supporting block II 2 are in opposite positions, and the guide rod I3 and the guide rod II 4 are arranged between the supporting block I1 and the supporting block II 2 to form a frame structure; after installation, guide I3 is parallel to guide II 4. The screw I5 penetrates through the supporting block I1 and is movably connected with the supporting block I1, the screw II 6 penetrates through the supporting block II 2 and is movably connected with the supporting block II 2, the screw I5 and the screw II 6 are both positioned between the guide rod I3 and the guide rod II 4, and the central line of the screw I5 and the central line of the screw II 6 are positioned on the same straight line; one end of the screw rod I5 is adjacent to one end of the screw rod II 6 at a small distance; the one end of lead screw I5 is located one side of supporting shoe I1 and installs handle I, and the one end of lead screw II 6 is located one side of supporting shoe II 2 and installs handle II, and twist grip I just can drive lead screw I5 and do the rotation motion, and is same, rotates twist grip II just can drive lead screw II 6 and do the rotation motion.

The two linear sliding platforms are connected together through four guide rods III 7, and the four guide rods III 7 are parallel to each other. Two parallel guide rods III 7 are fixedly mounted on a supporting block I1 of one linear sliding platform, two parallel guide rods III 7 are fixedly mounted on a supporting block II 2 of the other linear sliding platform, the supporting block I1 of the other linear sliding platform is movably connected with the two parallel guide rods III 7 fixedly mounted on the supporting block I1 of the linear sliding platform, and the supporting block II 2 is movably connected with the two parallel guide rods III 7 fixedly mounted on the supporting block II 2 of the linear sliding platform. Therefore, one linear sliding platform can do linear translation motion relative to the other linear sliding platform, and the two linear sliding platforms can approach to each other and move away from each other. The linear sliding platform connected with the guide rod III 7 in a sliding mode can be spaced from the other linear sliding platform in a relative mode by arranging fixing bolts on the supporting block I1 and the supporting block II 2.

The forming part is of a symmetrical structure integrally and comprises two forming units with the same structure, one forming unit is arranged on one linear sliding platform, the other forming unit is arranged on the other linear sliding platform, and the two forming units are in opposite space states. Because the two linear sliding platforms can move relatively, the distance between the two forming units in the direction vertical to the central line of the guide rod I3 or the guide rod II 4 can be changed, namely the forming units are close to each other or the forming units are far away from each other. Forming areas are formed among the forming units, and then the sizes of the forming areas are adjustable.

In the technical scheme, although the two forming parts have the characteristic of local related operation in the direction vertical to the central line of the guide rod I3 or the guide rod II 4, the two forming parts are independently operated on the whole layer, so that the specific installation relationship of each forming part is different, and the installation modes are the same, namely, the two forming parts have a unified design idea; in each forming part, the two forming units are different in specific installation relationship, and the installation modes are the same, namely, the forming parts have a uniform design idea.

First, one forming unit in one of the forming members. The forming unit includes two movable molds and one fixed mold. Each movable mould comprises a sliding base 8 and a limiting block I9. The sliding base 8 is movably mounted on a guide rod I3 and a guide rod II 4 of one linear sliding platform, the guide rod I3 and the guide rod II 4 are movably connected with the sliding base 8 in a sliding mode, and the sliding base 8 can slide on the guide rod I3 and the guide rod II 4 in the same linear direction. The sliding base 8 is connected with the screw rod I5, and the screw rod I5 can drive the sliding base 8 to move linearly along with the rotation; because the surface of the screw rod I5 is provided with two sections of threads with opposite directions, the sliding bases 8 of the two movable dies do reverse synchronous motion when the screw rod I5 rotates. Sliding base 8 is last fixed mounting has two stoppers I9, and stopper I9 surface is equipped with the spacing face that forms by cambered surface and plane seamless connection, and two stoppers I9's spacing face orientation mutually perpendicular. The fixed mould comprises a fixed base 10 and a limiting block II 11. The fixed base 10 is fixedly arranged on a guide rod I3 and a guide rod II 4 of the linear sliding platform, and the fixed base 10 is static relative to the guide rod I3 and the guide rod II 4 and does not generate a transmission relation with the screw rod I5; the surface of the limiting block II 11 is also provided with a limiting surface formed by seamless connection of a cambered surface and a plane, the limiting surface and one of the limiting surfaces on each movable die are in the same plane, for example, the position relation between the limiting surface I12 and the limiting surface II 13 is in the same plane. After the installation, fixed mould is located between two movable mould, but two movable mould use fixed mould as the center synchronous phase to motion, also can synchronous dorsad motion, and then movable mould all can be close to fixed mould in step or keep away from fixed mould in step. The other forming unit in the same forming member is mounted in the same manner on the other linear slide platform. In the same forming part, one of the limiting surfaces on the movable dies which are in opposite positions and are respectively positioned on the two forming units is also positioned in the same plane, for example, the position relation between the limiting surface III 14 and the limiting surface IV 15 is positioned in the same plane. The distance between the two forming units can be adjusted by adjusting the distance between the two linear sliding platforms, and the distance between the two movable dies on each forming unit can be adjusted by driving the screw rods I5 on the two linear sliding platforms to rotate in the same direction, so that the forming units can obtain the adjusting capability in two vertical directions, namely the size of a forming area is adjustable.

Next, in the molding unit of the other molding member, the mounting structure thereof is different from that of the former molding member in that the movable dies are all provided with the screw ii 6. The distance between the two forming units in the forming part can be adjusted by adjusting the distance between the two linear sliding platforms, the distance between the two movable dies on each forming unit can be adjusted by driving the screw rods II 6 on the two linear sliding platforms to rotate in the same direction, and therefore the forming units also obtain the adjusting capability in two vertical directions, namely the size of a forming area is adjustable.

When the forming device is used, the screw rod I5 is driven to rotate by shaking the handle I, the screw rod II 6 is driven to rotate by shaking the handle II, and the distance of a sliding die in each forming part in the extending direction of the central line of the guide rod I3 or the guide rod II 4 can be adjusted; the distance between the two linear sliding platforms is changed, so that the distance of the forming unit in the same forming part in the direction perpendicular to the extending direction of the central line of the guide rod I3 or the guide rod II 4 can be adjusted.

As shown in fig. 3, 4, 5 and 6, the extrusion die includes a bracket 16, a power unit 17, a main transmission member 18, a sub transmission member 19, an opening and closing unit and a positioning unit. The power unit 17, the main transmission piece 18, the sub transmission piece 19, the opening and closing unit and the positioning unit are all arranged on the bracket 16, and the bracket 16 is arranged on a sliding table of the lifting assembly.

The power unit 17 is a cylinder, a cylinder body of the cylinder is fixedly connected with the support 16, and a piston rod of the cylinder extends into the middle position of the support 16.

The main transmission member 18 is a cross-shaped structure, and a piston rod of the air cylinder is fixedly connected with the middle part of the main transmission member 18 as a power output end force, so that the main transmission member 18 moves synchronously along with the piston rod of the air cylinder. The main transmission member 18 is provided with four projecting portions, the projecting direction of which is perpendicular to the center line of the piston rod of the cylinder.

The opening and closing unit comprises four forming plates 20, one end of each forming plate 20 is movably arranged on the support 16, so that the forming plates 20 can swing on the support 16, and the connection between the forming plates 20 and the support 16 is positioned close to the cylinder body of the air cylinder. After installation, the four forming plates 20 are distributed annularly around the center of the support 16, and the swinging directions of any two adjacent forming plates 20 are perpendicular to each other. The cross section of the forming plate 20 is an isosceles trapezoid, and the side lengths of the upper bottom and the lower bottom of the isosceles trapezoid are far longer than the length of the waist; the forming plate 20 is formed with elongated inclined surfaces 21 on both sides as a whole.

The sub-transmission member 19 is of a rod-shaped structure, one end of the sub-transmission member 19 is movably connected with a protruding part of the main transmission member 18 through a pin shaft, the other end of the sub-transmission member 19 is movably connected with the forming plate 20 through a pin shaft, and the connecting part of the sub-transmission member 19 and the forming plate 20 is close to the protruding part of the main transmission member 18. Since there are four forming plates 20, four sub-actuators 19 are provided on the extrusion die to connect the main actuator 18 and the forming plates 20. The linear reciprocating motion of the main transmission member 18 driven by the cylinder drives the sub transmission member 19, and thus the forming plate 20. In an initial state, a piston rod of the air cylinder is in an extending state; the surfaces of the forming plates 20 are all parallel to the center line of the piston rod of the cylinder, so that the surfaces of the four forming plates 20 form a structure similar to the continuous four surfaces of a cuboid connected end to end, and the surfaces of any two adjacent forming plates 20 are perpendicular to each other; the inclined surface 21 of one forming plate 20 side of any two adjacent forming plates 20 is right opposite to the inclined surface 21 of the other forming plate 20 side, the two inclined surfaces 21 are parallel, a condensation gap 22 is formed between the two opposite inclined surfaces 21, at the moment, the distance between the condensation gaps 22 is the largest, and the opening and closing unit is in an unfolding state. In operation, after the piston rod of the cylinder contracts, the main transmission piece 18 pulls the sub transmission piece 19 to move towards the middle position of the support 16, and finally the four forming plates 20 are driven to synchronously move towards the middle position until the inclined surfaces 21 of any two adjacent forming plates 20 are contacted with each other and are close to each other, the inclined surfaces 21 of any two adjacent forming plates 20 are opposite and inclined with each other at the moment, the condensation gap 22 is reduced to the minimum state, and the opening and closing unit is in a condensation state.

The positioning unit includes a positioning plate 23 and a suction cup 24. The positioning plate 23 is a flat rectangular structure and is fixedly mounted on the bracket 16; after installation, the surface of the positioning plate 23 is flush with one end of the forming plate 20 when the opening-closing unit is in the unfolded state. The shape of the positioning plate 23 corresponds to the shape of the area defined by the surrounding between the four forming plates 20 of the opening and closing unit, thereby facilitating the design of the positioning plate 23 to be large in size. The positioning unit is provided with four suckers 24, and the suckers 24 are all fixedly arranged on the bracket 16; the positioning plate 23 is provided with four through holes, and the suction cup 24 passes through the positioning plate 23 and protrudes out of the surface of the positioning plate 23. When the opening and closing unit is in the condensed state, the positioning plate 23 and one end of the forming plate 20 are relatively displaced in the direction of the center line of the piston rod of the cylinder.

When in use, the extrusion die is arranged above the forming die, the opening and closing unit is in an unfolded state, and the whole extrusion die is in a cuboid shape; after the paperboard is placed above the forming die, the extruding die is driven by the lifting assembly to move towards the position of the forming die, and the sucking disc 24 is in contact with the paperboard and then establishes a connection relation with the paperboard through negative pressure, so that the relative position relation between the paperboard and the extruding die is fixed; the extrusion die then extrudes the paperboard until the extrusion die extrudes the paperboard into a forming region of the forming die, the extrusion die also extending into the forming region. The distance between the forming plate 20 and the forming die when the opening and closing unit is in the expanded state and positioned in the forming area is certainly smaller than the distance between the forming plate 20 and the forming die when the opening and closing unit is in the condensed state and positioned in the forming area, so that after the paperboard is bent, the sucking discs 24 release the paperboard, and the opening and closing unit enters the condensed state and can be smoothly separated from the paperboard.

The operation mode of the positioning unit according to the production requirement can also further play a role in carrying, for example, after the paper board is bent, the sucking disc 24 continues to adsorb the bent paper board, namely the paper box, the bent paper board is firstly carried away from the forming die, after the paper board is placed at the target position, the opening and closing unit enters a condensation state, the sucking disc 24 releases the bent paper board, and then the extrusion die is separated from the bent paper board.

Claims (6)

1. The utility model provides a carton extrusion forming device, includes forming die, extrusion die and lifting unit, be equipped with the shaping region in the forming die, extrusion die installs on lifting unit, extrusion die stretches into forming die's shaping region in through lifting unit, its characterized in that: the forming die comprises a mounting frame and two adjustable forming parts, wherein the forming parts are arranged on the mounting frame, the mounting frame comprises two linear sliding platforms, the forming parts comprise two forming units, the two forming units are respectively arranged on the two linear sliding platforms, the two linear sliding platforms are in a parallel state and are movably connected with each other in a linear sliding mode to adjust the distance between the two forming units, the forming units comprise two movable dies and a fixed die, the movable dies are movably arranged on the linear sliding platforms, the linear sliding platforms drive the movable dies to do linear motion to adjust the distance between the two movable dies, the fixed die is fixedly arranged on the linear sliding platforms, the two movable dies of the forming units are positioned on the two sides of the fixed die and can synchronously and reversely move relative to the fixed die, the two forming units of the forming part are oppositely arranged and synchronously and reversely move along with the linear sliding platform to form a forming area with adjustable size between the two forming units with opposite positions, the extrusion die comprises a support (16), a power unit (17), a main transmission piece (18), a sub transmission piece (19) and an opening and closing unit, the power unit (17), the main transmission piece (18), the sub transmission piece (19) and the opening and closing unit are all arranged on the support (16), the support (16) is connected with a lifting assembly, the opening and closing unit at least comprises four forming plates (20) which synchronously move in a swinging mode, one end of each forming plate (20) is movably connected with the support (16), the swinging directions of any two adjacent forming plates (20) are mutually vertical, the main transmission piece (18) is arranged on the power output end of the power unit (17) and reciprocates in a linear mode, one end of the sub-transmission piece (19) is movably connected with the main transmission piece (18), the other end of the sub-transmission piece (19) is movably connected with the other end of the forming plate (20), and a condensation gap (22) is arranged between the adjacent forming plates (20).

2. The carton extrusion apparatus of claim 1, wherein: the linear sliding platform is provided with two separated and independently moving screw rods which are positioned on the same central line, one screw rod is movably connected with the two movable dies of one forming unit of one forming part, and the other screw rod is movably connected with the two movable dies of one forming unit of the other forming part.

3. The carton extrusion apparatus of claim 1, wherein: the movable mould is provided with two limit surfaces which are vertical to each other, the fixed mould is provided with the limit surfaces, one of the limit surfaces of the movable mould and the limit surface of the fixed mould are positioned in the same plane in the same forming unit, and one limit surface of one movable mould and one limit surface of the other movable mould in the two movable moulds which are positioned at opposite positions in the same forming part are positioned in the same plane.

4. The carton extrusion apparatus of claim 1, wherein: the two movable dies of the forming unit can synchronously and reversely move by taking the fixed die as a center.

5. The carton extrusion apparatus of claim 1, wherein: the cross section of each forming plate (20) is isosceles trapezoid, inclined surfaces (21) are arranged on two sides of each forming plate (20), the inclined surface (21) on one side of one forming plate (20) in any two adjacent forming plates (20) is opposite to the inclined surface (21) on one side of the other forming plate (20), and the condensation gap (22) is located between the two opposite inclined surfaces (21).

6. The carton extrusion apparatus of claim 1, wherein: the extrusion die for extrusion forming of the carton further comprises a positioning unit, the positioning unit comprises a positioning plate (23) and a suction cup (24), the positioning plate (23) and the suction cup (24) are fixedly mounted on the support (16), and the suction cup (24) penetrates through the positioning plate (23) and protrudes out of the surface of the positioning plate (23).

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