Environment-friendly hot-pressing forming machine for paper cups

Abstract

The utility model belongs to the technical field of paper cup forming equipment, and particularly relates to an environment-friendly paper cup hot-pressing forming machine which comprises a material table and a machine frame fixed to the upper surface of the material table, a feeding mechanism transversely penetrating through the machine frame is arranged on the material table, and the two corners of the lower portion of the machine frame extend downwards to the upper surface of the material table. A circular-truncated-cone-shaped mold is horizontally fixed to the middle of one side of the rack, a heat storage groove is formed in the upper surface of the circular-truncated-cone-shaped mold, an annular step is arranged on the upper edge of the heat storage groove, a heat preservation box with an upper opening structure is inserted into the heat storage groove, and the outer edge of the heat preservation box extends into the annular step of the heat storage groove. The side, close to the rack, of the heat preservation box communicates with a pressure relief pipe, a port of the pressure relief pipe extends out of the circular-truncated-cone-shaped mold, and a piston is slidably installed in the pressure relief pipe in the axial direction. Waste heat generated after hot pressing of each paper sheet is reserved for heating subsequent paper sheets, heat loss during continuous production of a paper cup production line is reduced, and energy conservation and environmental protection of the paper sheet hot pressing process are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of paper cup forming equipment, and particularly relates to an environmentally friendly hot pressing forming machine for paper cups. Background Art

[0002] During the paper cup production process, qualified paper is selected as the raw material and subjected to necessary pre-processing, such as cutting and gluing. The hot press mold is then installed on the press, and the mold's position and angle are adjusted to ensure precise forming. The press is then started, heating the mold and applying appropriate pressure. The combined effects of heat and pressure gradually soften the paper and adhere it to the mold surface. After the paper cup cools to a desired temperature, it is removed from the mold.

[0003] The paper cup hot press uses a suction cup to grab a die-cut piece of paper and pushes it along a platform to the bottom of the mold using two push rods. The mold used in this process is generally a horizontal, frustum-shaped cone. The paper is lifted by two opening and closing arc-shaped clamps, pressed against the mold's conical surface, and then pressed from above by a high-frequency electric heating head, firmly bonding the two ends of the paper.

[0004] During the hot pressing process of paper sheets, a truncated cone-shaped mold is attached to the frame, and a piece of Teflon cloth is installed on the truncated cone-shaped mold to prevent adhesion. When the paper sheet is heated, it is tightly attached to the truncated cone-shaped mold, and some heat is lost to the truncated cone-shaped mold. The heat of the truncated cone-shaped mold is then transferred to the frame, resulting in significant heat consumption for each paper sheet. Especially when the paper cup production line is in continuous production, the accumulated heat loss is huge, which is not conducive to energy saving and environmental protection of paper sheet hot pressing. Utility Model Content

[0005] The purpose of the utility model is to provide an environmentally friendly hot pressing machine for paper cups, which can retain the residual heat of each paper sheet after hot pressing to heat subsequent paper sheets, reduce the heat loss during continuous production of the paper cup production line, and improve the energy saving and environmental protection of the paper sheet hot pressing process.

[0006] The technical solutions adopted by this utility model are as follows:

[0007] A paper cup environmentally friendly hot pressing forming machine comprises a material table and a frame fixed on the upper surface of the material table, a feeding mechanism is provided on the material table which passes through the frame horizontally, two lower corners of the frame extend downward to the upper surface of the material table, a truncated cone-shaped mold is fixed horizontally in the middle of one side of the frame, a heat storage tank is provided on the upper surface of the truncated cone-shaped mold, an annular step is provided on the upper edge of the heat storage tank, an insulation box with an upper opening structure is inserted into the heat storage tank, the outer edge of the insulation box extends into the annular step of the heat storage tank, an arc is fixed on the opening of the insulation box The curved steel plate is used to press the paper sheets together, and the glue-coated paper sheets are placed on the material table one by one and moved by the feeding mechanism until the paper sheets are bent and stick to the outer conical surface of the frustum-shaped mold. The high-frequency hot pressing head is then lowered by the lifting module to stick to the outer arc surface of the curved steel plate to press the paper sheets together and quickly bond the two ends of the paper sheets. The residual heat of the curved steel plate is transferred to the paraffin in the heat storage tank. Since the insulation box surrounds the paraffin for insulation, the residual heat of each paper sheet after hot pressing can be effectively retained for heating subsequent paper sheets, reducing the heat loss during continuous production of the paper cup production line and improving the energy saving and environmental protection of the paper sheet hot pressing process.

[0008] As a preferred solution, the insulation box is connected to a pressure relief pipe on the side close to the frame, and a truncated cone-shaped mold extends from the port of the pressure relief pipe. A piston is installed axially inside the pressure relief pipe. Once the paraffin expands due to heat, it will flow into the pressure relief pipe to reduce the internal pressure of the insulation box. This part of the paraffin oil pushes the piston to rise along the pressure relief pipe, and the paraffin oil gradually shrinks when it cools down. The piston can be used to squeeze the paraffin oil downward under its own weight to flow back into the insulation box until the paraffin oil solidifies into paraffin wax, so that the paraffin always fills the insulation box to retain residual heat.

[0009] As a preferred solution, an elastic part fixedly connected to the piston is axially inserted into the port of the pressure relief pipe. The elastic part can be a high-temperature resistant compression spring. When the piston rises, the elastic part is compressed. When the piston falls, the elastic potential energy of the elastic part can strongly squeeze the paraffin oil, so that the paraffin oil can fully flow back into the insulation box.

[0010] As a preferred solution, an alloy ring is fixed to the end surface of the frustum-shaped mold away from the frame.

[0011] As a preferred solution, an internal threaded cover is provided on the threaded sleeve of the outer edge of the pressure relief pipe, and the inner wall of the internal threaded cover is fixedly connected to the end of the elastic member away from the piston.

[0012] As a preferred solution, the feeding mechanism includes two push rods slidably mounted on the upper surface of the material table. The material table has a square hole at a position facing the truncated cone-shaped mold. Two symmetrical loading clamps are vertically arranged in the square hole of the material table, and the two loading clamps are hinged between the sides close to each other.

[0013] As a preferred solution, two unloading claws are symmetrically arranged above the material table and located outside the truncated cone-shaped mold. The two unloading claws are bent toward the truncated cone-shaped mold at one end close to the frame. The push rod and the two loading claws are moved away from the truncated cone-shaped mold, and the two unloading claws are moved forward to press against the cup body, clamping the cup body through friction, and then moving horizontally in the opposite direction to drive the cup body out of the truncated cone-shaped mold. After reaching the unloading area, the cup body hits the top block to disengage from the two unloading claws, completing the unloading action.

[0014] The technical effects achieved by this utility model are:

[0015] The paper sheets coated with glue are placed on the material table one by one and transferred by the feeding mechanism until the paper sheets are bent and stick to the outer conical surface of the truncated cone-shaped mold. The high-frequency hot pressing head is then lowered by the lifting module to stick to the outer curved surface of the curved steel plate to press the paper sheets together and quickly bond the two ends of the paper sheets. The residual heat of the curved steel plate is transferred to the paraffin in the heat storage tank. Since the heat preservation box surrounds the paraffin for heat insulation, the residual heat of each paper sheet after hot pressing can be effectively retained and used to heat subsequent paper sheets, thereby reducing heat loss during continuous production of the paper cup production line and improving the energy saving and environmental protection of the paper sheet hot pressing process.

[0016] According to the utility model, once the paraffin expands due to heat, it will flow into the pressure relief pipe to reduce the internal pressure of the heat preservation box. This part of the paraffin oil pushes the piston to rise along the pressure relief pipe. When the paraffin oil cools down, it gradually contracts. The piston can be used to squeeze the paraffin oil downward under the action of its own weight to flow back into the heat preservation box until the paraffin oil solidifies into paraffin wax. The heat preservation box is always filled with paraffin to retain residual heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of an environmentally friendly hot pressing machine for paper cups according to the present invention;

[0018] Figure 2 This is a top view of an environmentally friendly hot pressing machine for paper cups according to the present invention;

[0019] Figure 3 It is a cross-sectional view of the truncated cone-shaped mold of the present invention;

[0020] Figure 4 It is a cross-sectional view of the insulation box of the present utility model;

[0021] Figure 5 This is a front view of the internal thread cover of the utility model;

[0022] Figure 6 It is a system block diagram of the control system of the utility model.

[0023] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0024] 1. Material table; 2. Machine frame; 3. Cone-shaped mold; 4. Heat storage tank; 5. Insulation box; 6. Curved steel plate; 7. Pressure relief pipe; 8. Piston; 9. Elastic part; 10. Alloy ring; 11. Internal thread cover; 12. Push rod; 13. Loading clamp; 14. Unloading clamp. DETAILED DESCRIPTION

[0025] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention and does not strictly limit the scope of protection of the present invention.

[0026] like Figures 1-6 As shown, an environmentally friendly hot pressing machine for paper cups is controlled by a control system. The whole machine includes a material table 1, a frame 2, a lifting module and a high-frequency hot pressing head arranged in sequence from bottom to top. The lifting module and the high-frequency hot pressing head are connected to the control system through relay signals. The frame 2 is fixed to the upper surface of the material table 1 by bolts. The frame 2 is fixedly connected to the lifting module. The high-frequency hot pressing head is lifted and slid on one side of the frame 2 through the lifting module. A feeding mechanism that passes through the frame 2 horizontally is provided on the material table 1. The two lower corners of the frame 2 extend downward to the upper surface of the material table 1. A frustum-shaped mold 3 is fixed horizontally in the middle of one side of the frame 2. An alloy bridge is fixed between the frustum-shaped mold 3 and the frame 2 by bolts. The frame is connected, leaving a gap for installation. A heat storage tank 4 is provided on the upper surface of the truncated cone-shaped mold 3. The cross-section of the heat storage tank 4 is fan-shaped, and an arc surface can be reserved to fit the outer conical surface of the truncated cone-shaped mold 3. An annular step is provided on the upper edge of the heat storage tank 4. An insulation box 5 with an upper opening structure is inserted inside the heat storage tank 4. The lower surface of the insulation box 5 is bonded to the inner wall of the heat storage tank 4. The insulation box 5 can be made of silicate material. The insulation box 5 is filled with paraffin for storing heat. The outer edge of the insulation box 5 extends into the annular step of the heat storage tank 4. The opening of the insulation box 5 is seamlessly welded with an arc steel plate, and the weld is polished smooth without protrusions. The arc steel plate 6 and the truncated cone-shaped mold 3 are made of the same material, and the two are completely separated by the insulation box 5.

[0027] After the paper is printed, it is die-cut into individual pieces of paper so that the pattern remains intact on one side of the paper. These pieces of paper are stacked in the barrel and can be individually sucked up by a suction cup and taken out. Glue is applied on one side to stick the two ends of the paper into hollow frustum-shaped cups.

[0028] When making the cup body, the glue-coated paper pieces are placed one by one on the material table 1 and moved by the feeding mechanism until the paper pieces are bent and stick to the outer conical surface of the truncated cone-shaped mold 3. Then the high-frequency hot pressing head is lowered by the lifting module to stick to the outer arc surface of the curved steel plate 6 to press the paper pieces together and quickly bond the two ends of the paper pieces. The residual heat of the curved steel plate 6 is transferred to the paraffin in the heat storage tank 4. Since the insulation box 5 surrounds the paraffin for insulation, the residual heat of each paper piece after hot pressing can be effectively retained for heating subsequent paper pieces, reducing the heat loss during continuous production of the paper cup production line and improving the energy saving and environmental protection of the paper hot pressing process.

[0029] For the curved steel plate 6, Teflon cloth can be added to its upper surface to prevent adhesion. It can withstand high temperatures of 330°C and will not deform for a long time under the high temperature environment of hot pressing. Since the curved steel plate 6 seals the opening of the insulation box 5, it can prevent paraffin from expanding due to heat and causing overflow.

[0030] The lifting module and high-frequency hot pressing head are both existing technologies and are not shown in the figure. The high-frequency hot pressing head uses high-frequency current to generate eddy currents in the metal workpiece, which in turn generates heat for heating. It can be used in conjunction with a temperature sensor for intermittent heating of paper sheets, achieving rapid local heating to a set high temperature range.

[0031] Refer to the attached Figure 3 and Figure 4 The side of the insulation box 5 close to the frame 2 is connected to a pressure relief pipe 7, and a truncated cone-shaped mold 3 is extended from the end of the pressure relief pipe 7. A piston 8 is axially slidably installed inside the pressure relief pipe 7. The density of the piston 8 is much greater than that of paraffin. Once the paraffin expands due to heat, it will flow into the pressure relief pipe 7 to reduce the internal pressure of the insulation box 5. This part of the paraffin oil pushes the piston 8 to rise along the pressure relief pipe 7, and the paraffin oil gradually shrinks when it cools down. The piston 8 can be used to squeeze the paraffin oil downward under the action of its own weight to flow back to the insulation box 5 until the paraffin oil solidifies into paraffin wax, so that the paraffin always fills the insulation box 5 to retain residual heat.

[0032] Refer to the attached Figure 4 and Figure 5 An elastic member 9 fixedly connected to the piston 8 is axially inserted at the end of the pressure relief pipe 7. Both ends of the elastic member 9 are connected by welding. A high-temperature resistant compression spring can be used for the elastic member 9. When the piston 8 rises, the elastic member 9 is compressed. When the piston 8 falls, the elastic potential energy of the elastic member 9 can strongly squeeze the paraffin oil, so that the paraffin oil can fully flow back into the insulation box 5.

[0033] Refer to the attached Figure 3 The end face of the truncated cone-shaped mold 3 away from the frame 2 is fixed with an alloy ring 10 by screws. Since the alloy ring 10 strengthens the structural strength of the side wall of the truncated cone-shaped mold 3, it can stably support the insulation box 5 and remove the internal pressure of the insulation box 5 without obvious deformation.

[0034] With reference to the attached drawings, Figure 4 and Figure 5 The outer edge of the pressure relief pipe 7 is threadedly sleeved with an internal threaded cover 11, and the inner wall of the internal threaded cover 11 is fixedly connected to the end of the elastic member 9 away from the piston 8. Since the internal threaded cover 11 is threadedly installed on the outer edge of the pressure relief pipe 7, it can be unscrewed along the thread and stretched outward to pull out the elastic member 9, which is convenient for maintenance or replacement of the elastic member 9.

[0035] Refer to the attached Figure 1 、 Figure 2 and Figure 6 The feeding mechanism includes two push rods 12 slidably mounted on the upper surface of the material table 1, and the lower ends of the two push rods 12 extend along the sliding hole to the bottom of the material table 1. Two horizontal cylinders for moving the push rods 12 are fixed to the lower surface of the material table 1 by bolts. There is a square hole at the position of the material table 1 facing the truncated cone-shaped mold 3, and two symmetrical feeding clamps 13 are vertically arranged in the square hole of the material table 1. The two feeding clamps 13 are hinged between the sides close to each other. A vertical cylinder is arranged under the material table 1, and the output end of the vertical cylinder is hinged to the lower surface of the two feeding clamps 13. The vertical cylinder and the two horizontal cylinders are connected to the control system through relay signals. The push rod 12 can be used to push the paper sheet horizontally to the bottom of the truncated cone-shaped mold 3. Since the paper sheet is wider than the square hole, the two feeding clamps 13 are raised and lift the paper sheet until it sticks to the outer cone surface of the truncated cone-shaped mold 3 and maintains it for 2s. During this period, the high-frequency hot pressing head is started to hot-press the overlapping parts of the two ends of the paper sheet.

[0036] Since the two symmetrical feeding jaws 13 are both curved, after being attached to the lower surface of the truncated cone-shaped mold 3, the two jaws are turned upward around the hinge point between them, and can cover the truncated cone-shaped mold 3 after closing.

[0037] Refer to the attached Figure 2 and Figure 6 Two unloading jaws 14 are symmetrically arranged at a position above the material table 1 and outside the truncated cone-shaped mold 3. Two transverse movement modules for transversely moving the unloading jaws 14 are fixed side by side on the upper surface of the material table 1. The two transverse movement modules are connected to the control system through relay signals. The two unloading jaws 14 are bent toward the truncated cone-shaped mold 3 at one end close to the frame 2, and the push rod 12 and the two loading jaws 13 are moved away from the truncated cone-shaped mold 3, and the two unloading jaws 14 are moved forward to press against the cup body, clamping the cup body through friction, and then moving horizontally in the opposite direction to drive the cup body out of the truncated cone-shaped mold 3. After reaching the unloading area, the cup body hits the top block to separate from the two unloading jaws 14, completing the unloading action.

[0038] The working principle of the present invention is as follows: during operation, the glue-coated paper sheets are placed one by one on the material table 1 and transferred by the feeding mechanism until the paper sheets are bent and stick to the outer conical surface of the truncated cone-shaped mold 3, and then the high-frequency hot pressing head is lowered by the lifting module to stick to the outer arc surface of the arc-shaped steel plate 6 to press the paper sheets together and quickly bond the two ends of the paper sheets. The residual heat of the arc-shaped steel plate 6 is transferred to the paraffin in the heat storage tank 4. Since the heat preservation box 5 surrounds the paraffin for heat insulation, the residual heat of each paper sheet after hot pressing can be effectively retained and used to heat subsequent paper sheets, thereby reducing the heat loss during continuous production of the paper cup production line and improving the energy saving and environmental protection of the paper sheet hot pressing process.

[0039] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. An environmentally friendly hot pressing machine for paper cups, comprising a material table (1) and a frame (2) fixed to the upper surface of the material table (1), wherein a feeding mechanism is provided on the material table (1) and passes through the frame (2) transversely, and is characterized in that: The two lower corners of the frame (2) extend downward to the upper surface of the material table (1); a truncated cone-shaped mold (3) is fixed horizontally in the middle of one side of the frame (2); a heat storage tank (4) is provided on the upper surface of the truncated cone-shaped mold (3); an annular step is provided on the upper edge of the heat storage tank (4); an insulation box (5) with an upper opening structure is inserted into the heat storage tank (4); the outer edge of the insulation box (5) extends into the annular step of the heat storage tank (4); and an arc-shaped steel plate (6) is fixed at the opening of the insulation box (5).

2. The environmentally friendly hot pressing machine for paper cups according to claim 1, characterized in that: The side of the heat-insulating box (5) close to the frame (2) is connected to a pressure relief pipe (7), the end of the pressure relief pipe (7) extends out of the truncated cone-shaped mold (3), and a piston (8) is axially slidably installed inside the pressure relief pipe (7).

3. The environmentally friendly hot pressing machine for paper cups according to claim 2, characterized in that: An elastic member (9) fixedly connected to the piston (8) is inserted axially into the port of the pressure relief pipe (7).

4. The environmentally friendly hot pressing machine for paper cups according to claim 1, characterized in that: An alloy ring (10) is fixed to the end surface of the truncated cone-shaped mold (3) away from the frame (2).

5. The environmentally friendly hot pressing machine for paper cups according to claim 3, characterized in that: An inner threaded cover (11) is provided on the threaded sleeve of the outer edge of the pressure relief pipe (7), and the inner wall of the inner threaded cover (11) is fixedly connected to the end of the elastic member (9) away from the piston (8).

6. The environmentally friendly hot pressing machine for paper cups according to claim 1, characterized in that: The feeding mechanism comprises two push rods (12) slidably mounted on the upper surface of the material platform (1); the material platform (1) has a square hole at a position facing the truncated cone-shaped mold (3); two symmetrical feeding clamps (13) are vertically arranged in the square hole of the material platform (1); and the two feeding clamps (13) are hinged between the sides close to each other.

7. The environmentally friendly hot pressing machine for paper cups according to claim 1, characterized in that: Two blanking clamps (14) are symmetrically arranged above the material table (1) and outside the truncated cone-shaped mold (3), and one end of the two blanking clamps (14) close to the frame (2) is bent toward the truncated cone-shaped mold (3).

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