Paper cup forming device

Abstract

The invention discloses a paper cup forming device which comprises a base, a center sleeve is installed in the center of the base, a paper feeding structure used for paper board feeding and a forming structure achieving paper cup forming through reciprocating linear motion are further installed on the base, and the center sleeve is provided with a plurality of sliding grooves used for installing the forming structure. A demolding structure for taking out the paper cup through airflow is arranged above the center sleeve, the forming structure comprises a forming part, the forming part is installed on the sliding groove in a sliding mode, and a cup wall forming structure matched with the forming part to achieve paper cup forming is arranged below the forming part; according to the device, circulation of paper cup production can be achieved through reciprocating rectilinear motion of the forming part, a processing line is shorter, and therefore the working efficiency is improved, contacts are arranged on the contact faces after the two mold petals are closed, an external power source and the hot melting plate form a channel through contact of the contacts, bonding and fixing of the connector of the paper cup are achieved through heating of the hot melting plate, and the production efficiency is improved. Therefore, forming of the cup wall of the paper cup is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of paper cup production, and in particular to a paper cup forming device. Background Art

[0002] Paper cups are made by mechanically processing and gluing base paper (white paperboard) made of chemical wood pulp into a paper container with a cup-shaped appearance. Paper cups for frozen foods are coated with wax and can hold ice cream, jam, butter, etc. Paper cups for hot drinks are coated with plastic and can withstand temperatures above 90°C and can hold beverages such as boiled water, coffee, and milk. Paper cups are safe, hygienic, light, and convenient, and are widely used in people's lives. Paper cups can be seen in public places, hotels, and restaurants.

[0003] Since paper cups are disposable items, the consumption of paper cups is very large. According to surveys, the number of disposable paper cups consumed worldwide each year is as high as tens of billions. Therefore, a large number of paper cups need to be produced for people to use. However, the existing paper cup forming production line has many process steps, a long production line, and requires multiple clamping. It is easy to make mistakes during the clamping process, resulting in a decrease in the qualified finished product rate, a large floor space, and low production and processing efficiency. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a paper cup forming device, which can realize the cycle of paper cup production through the reciprocating linear motion of the forming part, making the processing line shorter, thereby improving work efficiency.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a paper cup forming device, comprising a base, a center sleeve is installed at the center position of the base, a paper feeding structure for feeding paperboard and a forming structure for realizing paper cup forming by reciprocating linear motion are also installed on the base, the center sleeve is provided with a plurality of slide grooves for installing the forming structure, a demolding structure for realizing paper cup removal by airflow is arranged above the center sleeve, the forming structure comprises a forming part, the forming part is slidably installed on the slide groove, the forming part is divided into a forming section, a bottom sealing section and a demolding section from bottom to top, the forming part is coupled with the cup wall forming structure, the bottom sealing structure and the demolding structure in sequence, so as to realize the forming, bottom sealing and demolding of the paper cup.

[0006] Furthermore, a cup wall forming structure is provided below the forming part and cooperates with the forming part to realize paper cup forming. The forming part includes a driving block coaxially arranged with the center sleeve, and a plurality of driving shafts are evenly distributed on the outer wall of the driving block. A core block corresponding to the inner wall of the paper cup is coaxially installed on the driving shaft, and the core block is installed at one end of the driving shaft away from the driving block through a thread. A forming plate is provided below the core block and realizes paper cup forming by wrapping the core block.

[0007] Furthermore, the lower end surface of the driving block is installed at the output end of the first linear driving device.

[0008] Furthermore, the forming plate is placed on a base frame, and an upper end surface of the base frame is provided with an opening for the forming plate to pass through.

[0009] Furthermore, a support plate in contact with the forming plate is provided at the opening position of the base frame, and the support plate is installed at the bottom of the opening through a first spring.

[0010] Furthermore, a partition is provided in the middle of the opening, and a through groove for avoiding the first spring is provided on the partition.

[0011] Furthermore, a bearing frame for positioning the cardboard is installed on the base frame, a groove for fixing and positioning the cardboard is provided on the bearing frame, and an avoidance groove for driving the shaft to pass through is provided on the bearing frame.

[0012] Furthermore, the paper feeding structure includes a box for storing cardboard, a cover is provided on the box, a slot for cardboard to pass through is provided in the direction of the cover pointing to the forming structure, a feed rack for pushing out the cardboard through linear motion is installed in the slot, the feed rack is "L" shaped, one end of the feed rack is slidably installed in the slot, the other end of the feed rack is installed on the box through a second spring, a motor is installed on the box through a connecting frame, a fan-shaped friction wheel is provided at the output end of the motor which contacts the feed rack through rotation, a push plate for pushing the cardboard upward is provided in the box, and the push plate is installed in the box through a third spring.

[0013] Furthermore, the molding structure also includes a bottom sealing structure for installation on the bottom of the paper cup, the bottom sealing structure includes an L frame installed on the base frame, one end of the L frame is fixedly installed on the base frame, and a second linear drive device is installed on the other end of the L frame. A hot melt plate is installed on the output end of the second linear drive device. A sleeve for cooperating with the hot melt plate is also installed on the base frame, and a gap is set between the hot melt plate and the sleeve for paper to pass through.

[0014] Furthermore, the demolding structure includes an air pipe connected to an external air pump, the air pipe is fixedly mounted on the center sleeve, a one-way valve is provided at one end of the air pipe close to the driving block, a push rod extending to the outside of the air pipe and cooperating with the driving block is provided on the valve core of the one-way valve, an opening is provided at one end of the driving block close to the push rod, and a through hole connected to the opening of the driving block is provided on the core block and the driving shaft.

[0015] Compared with the prior art, the present invention can achieve the following beneficial effects: 1. This device can realize the cycle of paper cup production through the reciprocating linear motion of the forming part, making the processing line shorter and thus improving work efficiency; 2. When the core block is pressed down, the device closes the two mold halves, and the two mold halves wrap the core block after closing. The trough body formed by the core block and the two mold halves after closing is the size of the finished paper cup. A hot melt plate is provided at the contact position of the two mold halves after closing, and a contact point is provided on the contact surface of the two mold halves after closing. The contact point is used to form a passage between the external power supply and the hot melt plate, and the hot melt plate is heated to achieve bonding and fixing at the interface of the paper cup, thereby realizing the forming of the wall of the paper cup; 3. The core block of this device is connected to the driving shaft through threads, and the size of the processed paper cup can be changed by disassembling and replacing the core block; 4. In this device, when the forming plate contacts the partition through the supporting plate, the forming plate cannot continue to move downward, so the forming plate will be tightly closed under the pressure of the core block, thereby ensuring the forming of the paper cup wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the paper cup forming device of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the paper feeding structure of the paper cup forming device of the present invention; Figure 3 It is a schematic cross-sectional structure diagram of the paper feeding structure of the paper cup forming device of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the forming structure of the paper cup forming device of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the forming structure of the paper cup forming device of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the bottom cover structure of the paper cup forming device of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the cup wall forming structure of the paper cup forming device of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the forming part of the paper cup forming device of the present invention; Fig. 9 It is a schematic diagram of the cross-sectional structure of the forming part of the paper cup forming device of the present invention; Fig.10 It is a schematic cross-sectional structure diagram of the demolding structure of the paper cup forming device of the present invention;.

[0017] Among them: base 1; paper feeding structure 2; box body 21; cover body 22; feeding frame 23; second spring 24; motor 25; fan-shaped friction wheel 26; push plate 27; third spring 28; molding structure 3; bottom cover structure 31; L frame 311; second linear drive device 312; hot melt plate 313; sleeve body 314; cup wall molding structure 32; bottom frame 321; partition 322; first spring 323; support plate 324; molding plate 325; bearing frame 326; avoidance groove 327; molding part 33; driving block 331; driving shaft 332; core block 333; first linear drive device 34; center sleeve 4; demolding structure 5; air pipe 51; one-way valve 52; push rod 53. DETAILED DESCRIPTION Example

[0018] Combination Figure 1 , Figure 4 and Figure 5 As shown, the present invention provides a paper cup forming device, comprising a base 1, the base 1 is fixed to the ground by bolts or concrete, a center sleeve 4 is installed at the center of the base 1, a paper feeding structure 2 for feeding paperboard and a forming structure 3 for forming paper cups by reciprocating linear motion are also installed on the base 1, the center sleeve 4 is provided with a plurality of slide grooves for installing the forming structure 3, a demolding structure 5 for taking out paper cups by airflow is arranged above the center sleeve 4, the slide grooves are evenly distributed on the center sleeve 4, and the direction of the slide grooves is along the establishment direction of the center sleeve 4. The paper feeding structure 2 is used to automatically feed paperboard to the forming structure 3, and the forming structure 3 is used to process the paperboard into a paper cup. The forming structure 3 includes a forming part 33, and the forming part 33 is slidably installed on the slide. The forming part 33 is divided into a forming section, a bottom sealing section and a demolding section from bottom to top. The forming part 33 is coupled with the cup wall forming structure 32, the bottom sealing structure 31 and the demolding structure 5 in sequence to realize the forming, bottom sealing and demolding of the paper cup. Therefore, the forming part 33 is located at the lower, middle and upper positions of the slide, which correspond to the cup wall forming, bottom sealing and demolding of the paper cup respectively.

[0019] Combination Figure 7 , Figure 8 and Fig. 9As shown, a cup wall forming structure 32 for cooperating with the forming part 33 to realize paper cup forming is arranged below the forming part 33, and the forming part 33 includes a driving block 331 coaxially arranged with the center sleeve 4, and a plurality of driving shafts 332 are evenly distributed on the outer wall of the driving block 331, and the driving shaft 332 is slidably installed on the slide groove, and the number of the driving shafts 332 is the same as the number of the slide grooves, and the position of the driving shaft 332 corresponds to the position of the slide groove one by one, and a core block 333 corresponding to the inner wall of the paper cup is coaxially installed on the driving shaft 332, and the core block 333 is installed at the end of the driving shaft 332 away from the driving block 331 through a thread, and the size of the core block 333 corresponds to the internal size of the paper cup after forming. By utilizing the threaded connection between the core block 333 and the driving shaft 332, the size of the processed paper cup can be changed by disassembling and replacing the core block 333. Since paper cups are produced in large quantities, in the production process of a batch of paper cups, it is only necessary to select a suitable core block 333 and install it on the driving shaft 33 before processing. 2, a forming plate 325 is provided below the core block 333 for wrapping the core block 333 to realize paper cup molding, the distance between the forming plate 325 and the core block 333 is not less than the thickness of the paperboard, the forming plate 325 is composed of two symmetrical mold halves, a groove body is provided on the mold halves, the groove provided on each mold halves corresponds to half of the outer wall of the paper cup, the two mold halves are connected by hinges, and the mold halves are normally open and placed horizontally, when the core block 333 is pressed down, the middle position of the forming plate 325 is pressed to close the two mold halves, and the core block 333 is wrapped after the two mold halves are closed, and the groove body enclosed by the core block 333 and the two mold halves after closing is the size of the finished paper cup, a hot melt plate is provided at the position where the two mold halves are in contact after closing, and a contact point is provided on the surface where the two mold halves are in contact after closing, and the contact point is used to form a passage between the external power supply and the hot melt plate, and the hot melt plate is heated to realize bonding and fixing at the interface of the paper cup, thereby realizing the molding of the wall of the paper cup.

[0020] In order to realize the driving of the driving block 331, the lower end face of the driving block 331 is installed on the output end of the first linear driving device 34. The first linear driving device 34 is preferably a hydraulic device. The first linear driving device is located in the center sleeve 4. The driving of the driving block 331 can be realized by utilizing the first linear driving device 34, thereby realizing the movement of the core block 333 through the driving shaft 332.

[0021] The forming plate 325 is placed on the bottom frame 321. The top surface of the bottom frame 321 is provided with a groove body for positioning the forming plate 325. The groove body can make the forming plate 325 accurately located directly below the core block 333, and at the same time, the forming plate 325 can be placed more stably. The upper end surface of the bottom frame 321 is provided with an opening for the forming plate 325 to pass through. The size of the opening is slightly larger than the size of the forming plate 325 after closing. By using the opening, when the core block 333 presses the forming plate 325 downward, the two mold petals of the forming plate 325 can gradually close while falling, thereby realizing the forming of the wall of the paper cup. In order to prevent the forming plate 325 from falling from the opening due to its own gravity, a support plate 324 in contact with the forming plate 325 is provided at the opening position of the bottom frame 321. The support plate 324 can slide freely in the opening. The support plate 324 is installed at the bottom of the opening through a first spring 323. The first spring 323 plays a role in supporting the support plate 324 to prevent the forming plate 325 from being affected by its own gravity. The gravity affects the falling from the opening. In order to achieve the tight closure of the two mold halves, a partition 322 is arranged in the middle position of the opening. A through groove for avoiding the first spring 323 is arranged on the partition 322. In the process of the core block 333 pressing the forming plate 325 downward, when the forming plate 325 contacts the partition 322 through the supporting plate 324, the forming plate 325 cannot continue to move downward. Therefore, the forming plate 325 will be tightly closed by the pressure of the core block 333, thereby ensuring the forming of the paper cup wall. In the process of the core block 333 rising, it will automatically drive the forming plate 325 to move upward. When the opening size of the forming plate 325 is larger than the size of the core block 333, the core block 333 cannot drive the forming plate to continue to rise to the groove position set on the bottom frame 321. At this time, the first spring 323 will provide power for the rising of the forming plate 325. Since the remaining stroke is small at this time, the elastic potential energy generated by the compression of the first spring 323 at this position is small, which can prevent the first spring 323 from releasing the elastic potential energy to bounce the forming plate.

[0022] A carrier frame 326 for positioning the cardboard is installed on the base frame 321. A groove for fixing and positioning the cardboard is provided on the carrier frame 326. The groove can prevent the cardboard from falling due to its own gravity and can accurately position the cardboard for processing. The height of the groove is not less than the thickness of the cardboard, and the lowest point of the groove is not higher than the height of the box body 21. In order to prevent the carrier frame 326 from interfering with the movement of the driving shaft 332, the carrier frame 326 is provided with an avoidance groove 327 for the driving shaft 332 to pass through. The width of the avoidance groove 327 is not limited to the diameter of the driving shaft 332.

[0023] Combination Figure 2 and Figure 3As shown, the paper feeding structure 2 includes a box body 21 for storing cardboards, the minimum distance between the upper end of the box body 21 and the core block 333 is not less than the thickness of the cardboard, and a cover body 22 is provided on the box body 21, and the cover body 22 can be installed on the box body 21 by screws, so as to facilitate the addition of cardboards, and the cover body 22 is provided with a slot body for cardboards to pass in the direction of the forming structure 3, and a feeding frame 23 is installed in the slot body to realize the pushing out of the cardboard by linear motion, and the feeding frame 23 is slidably installed on the slot body, and the height of the slot body is not less than a single paper The thickness of the board is not greater than the thickness of two paperboards. The length of the slot at the end of the cover 22 close to the forming structure 3 is not less than the height of the paperboard, and the length of the slot at the end of the cover 22 away from the forming structure 3 is less than the height of the paperboard. This arrangement can push the paperboard to the forming structure when the feed frame 23 moves toward the forming structure 3, and when the feed frame 23 moves in the opposite direction to the forming structure 3, it prevents the paperboard from sliding out of the slot at the end away from the forming structure 3. The feed frame 23 is "L" shaped, and one end of the feed frame 23 is slidably installed in the slot. The other end of the feed frame 23 is mounted on the box body 21 through a second spring 24, and the second spring 24 applies a thrust to the feed frame 23. A motor 25 is mounted on the box body 21 through a connecting frame, and a fan-shaped friction wheel 26 is provided at the output end of the motor 25 to contact the feed frame 23 by rotation. A push plate 27 for pushing the cardboard upward is provided in the box body 21, and the push plate 27 is installed in the box body 21 through a third spring 28. The push plate can be used to push up the next cardboard after one cardboard is transported. When the friction wheel 26 rotates, the next cardboard can be pushed up. During the process, when the friction wheel 26 contacts the feed rack 23, the friction wheel 26 drives the feed rack 23 through the friction force between the friction wheel 26 and the feed rack 23. When the friction wheel 26 separates from the feed rack 23, the second spring 24 releases elastic potential energy to retract the feed rack 23, thereby ensuring the smooth feeding of the next cardboard. In this application, the initial position of the core block 333 is located in the middle position of the slide slot. The first step in the operation of the device should be to transport the cardboard through the paper feeding structure 2, followed by the downward movement of the core block 333 to achieve the forming of the paper cup.

[0024] Combination Figure 6As shown, the molding structure 3 also includes a bottom sealing structure 31 for installation at the bottom of the paper cup, and the bottom sealing structure 31 includes an L frame 311 installed on the bottom frame 321, one end of the L frame 311 is fixedly installed on the bottom frame 321, and the other end of the L frame 311 is installed with a second linear drive device 312, and the second linear drive device 312 is preferably a hydraulic device. A hot melt plate 313 is installed at the output end of the second linear drive device 312, and a sleeve 314 for cooperating with the hot melt plate 313 is also installed on the bottom frame 321, and the inner diameter of the sleeve 314 is the same as the outer diameter of the hot melt plate 313. Similarly, the hot melt plate 313 and the sleeve 314 are provided with a gap for paper to pass through, and the size of the gap is not less than the thickness of the paper. The paper passes through the gap set between the hot melt plate 313 and the sleeve 314 through the external conveying structure. The hot melt plate 313 can be driven to move by a hydraulic device. The hot melt plate 313 cooperates with the sleeve 314 to achieve paper cutting and push out the cut paper. It should be noted that the bottom cover structure 31 is operated after the wall of the paper cup is formed. The operating position of the bottom cover structure 31 should be after the core block 333 moves to the lowest point and rises, and its operating height is not lower than the supporting frame 326.

[0025] Combination Fig.10 As shown, the demolding structure 5 includes an air pipe 51 connected to an external air pump, the air pipe 51 is fixedly mounted on the center sleeve 4, the material of the air pipe 51 is preferably hard plastic or metal, the air pipe 51 is coaxially arranged with the center sleeve 4, a one-way valve 52 is arranged at one end of the air pipe 51 close to the driving block 331, the one-way valve 52 acts as a switch, a valve core of the one-way valve 52 is provided with a push rod 53 extending to the outside of the air pipe 51 and cooperating with the driving block 331, the driving block 331 is provided with an opening at one end close to the push rod 53, the core block 333 and the driving shaft 332 are provided with a push rod 53 cooperating with the driving block 331, and the one-way valve 52 is provided with a push rod 53 cooperating with the driving block 331. The through hole connected to the opening of the driving block 331, during the rising process of the driving block 331, the driving block pushes the push rod 53 to make the air pipe 51 exhaust outward, and the air flow passes through the opening set on the driving block 331 and the through holes set on the core block 333 and the driving shaft 332 to blow the paper cup from the core block 333 to the external collection pipeline. It should be noted that: the operation of the film stripping structure 5 is the last process of this device. When this process is carried out, the position of the core block 333 should be at the top of the slide slot. Since this process is completed, one processing is completed. When the core block 333 moves downward again, it is the next processing cycle.

Claims

1. A paper cup forming device, comprising a base (1), a center sleeve (4) being installed at the center of the base (1), a paper feeding structure (2) for feeding paperboard and a forming structure (3) for forming paper cups by reciprocating linear motion being installed on the base (1), the center sleeve (4) being provided with a plurality of slide grooves for installing the forming structure (3), and a demolding structure (5) for taking out paper cups by air flow being provided above the center sleeve (4), characterized in that: The forming structure (3) comprises a forming part (33), the forming part (33) being slidably mounted on a slide groove, the forming part (33) being divided into a forming section, a bottom sealing section and a demolding section from bottom to top, the forming part (33) being coupled with the cup wall forming structure (32), the bottom sealing structure (31) and the demolding structure (5) in sequence, respectively, to achieve the forming, bottom sealing and demolding of the paper cup.

2. The paper cup forming device according to claim 1, characterized in that: A cup wall forming structure (32) is arranged below the forming portion (33) and cooperates with the forming portion (33) to achieve paper cup forming. The forming portion (33) comprises a driving block (331) coaxially arranged with the center sleeve (4). A plurality of driving shafts (332) are evenly distributed on the outer wall of the driving block (331). A core block (333) corresponding to the inner wall of the paper cup is coaxially mounted on the driving shaft (332). The core block (333) is threadedly mounted on one end of the driving shaft (332) away from the driving block (331). A forming plate (325) is arranged below the core block (333) and achieves paper cup forming by wrapping the core block (333).

3. The paper cup forming device according to claim 2, characterized in that: The lower end surface of the driving block (331) is mounted on the output end of the first linear driving device (34).

4. The paper cup forming device according to claim 2, characterized in that: The forming plate (325) is placed on the bottom frame (321), and an opening for the forming plate (325) to pass through is provided on the upper end surface of the bottom frame (321).

5. The paper cup forming device according to claim 4, characterized in that: A support plate (324) in contact with the forming plate (325) is provided at the opening position of the bottom frame (321); the support plate (324) is installed at the bottom of the opening via a first spring (323).

6. The paper cup forming device according to claim 4, characterized in that: A partition plate (322) is provided in the middle of the opening, and a through groove for circumventing the first spring (323) is provided on the partition plate (322).

7. The paper cup forming device according to claim 4, characterized in that: A bearing frame (326) for positioning the cardboard is installed on the bottom frame (321), a groove for fixing and positioning the cardboard is provided on the bearing frame (326), and an avoidance groove (327) for driving the shaft (332) to pass through is provided on the bearing frame (326).

8. The paper cup forming device according to claim 1, characterized in that: The paper feeding structure (2) comprises a box body (21) for storing paperboards, a cover body (22) being provided on the box body (21), a slot body for paperboards to pass through being provided on the cover body (22) in a direction pointing to the forming structure (3), a feeding frame (23) for pushing out paperboards through linear motion being installed in the slot body, the feeding frame (23) being in an "L" shape, one end of the feeding frame (23) being slidably installed in the slot body, the other end of the feeding frame (23) being installed on the box body (21) through a second spring (24), a motor (25) being installed on the box body (21) through a connecting frame, a sector-shaped friction wheel (26) being provided at the output end of the motor (25) being contacted with the feeding frame (23) through rotation, a push plate (27) for pushing paperboards upward being provided in the box body (21), the push plate (27) being installed in the box body (21) through a third spring (28).

9. The paper cup forming device according to claim 1, characterized in that: The molding structure (3) further comprises a bottom cover structure (31) for mounting on the bottom of the paper cup, the bottom cover structure (31) comprising an L frame (311) mounted on a bottom frame (321), one end of the L frame (311) being fixedly mounted on the bottom frame (321), a second linear drive device (312) being mounted on the other end of the L frame (311), a hot melt plate (313) being mounted on the output end of the second linear drive device (312), a sleeve (314) for cooperating with the hot melt plate (313) being further mounted on the bottom frame (321), a gap being provided between the hot melt plate (313) and the sleeve (314) for paper to pass through.

10. The paper cup forming device according to claim 2, characterized in that: The demolding structure (5) comprises an air pipe (51) connected to an external air pump, the air pipe (51) being fixedly mounted on the central sleeve (4), a one-way valve (52) being arranged at one end of the air pipe (51) close to the driving block (331), a push rod (53) extending to the outside of the air pipe (51) and cooperating with the driving block (331) being arranged on the valve core of the one-way valve (52), an opening being arranged at one end of the driving block (331) close to the push rod (53), and a through hole being arranged on the core block (333) and the driving shaft (332) and communicating with the opening of the driving block (331).

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