Paper bottle production equipment

Abstract

The present invention provides a paper bottle production device, which is provided with a paper bottle wet blank forming device and a paper bottle hot pressing and shaping device. The paper bottle wet blank forming device includes a forming machine frame, a slurry tank, a forming upper die member, a forming lower die member and a forming air source pump body; the paper bottle hot pressing and shaping device includes a hot pressing machine frame, a hot pressing upper die member, a hot pressing lower die member, a pressure accumulating type elastic bag body control mechanism and a hot pressing air source pump body; the forming upper die member and the forming lower die member are combined in the slurry tank to prepare a paper bottle wet blank, the forming upper die member and the forming lower die member leave the slurry tank and are separated, the forming upper die member transfers the paper bottle wet blank adsorbed thereon to the hot pressing lower die member, the hot pressing upper die member and the hot pressing lower die member are combined, and the pressure accumulating type elastic bag body control mechanism works and enters the interior of the paper bottle wet blank to apply an outward pressure to the paper bottle wet blank, and the paper bottle wet blank is hot pressed and shaped to form a paper bottle product. The paper bottle production device of the present invention can automatically produce paper bottles.

Description

Technical Field

[0001] This invention relates to the field of paper bottle production technology, and in particular to a paper bottle production equipment. Background Technology

[0002] With increasing environmental awareness, pulp-molded products are attracting more and more attention. Pulp-molded bottles, as an environmentally friendly and biodegradable packaging container, have broad application prospects. However, the market currently lacks equipment for automated production of paper bottles. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a paper bottle production equipment that can automatically produce paper bottles.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The paper bottle production equipment includes a forming station, a hot pressing station, and a transfer station. The forming station is equipped with a paper bottle wet preform forming device, which includes a forming frame, a slurry tank, an upper forming die component, a lower forming die component, and a forming air source pump. The slurry tank is located below the forming frame. The lower forming die component has a lower forming mold, which is vertically movable within the slurry tank. The upper forming die component is vertically and horizontally movable above the slurry tank and has an upper forming mold. A sliding mechanism is provided at the rear of either the upper or lower forming die. The device includes a post-forming mold, driven by a post-forming drive unit; a forming air source pump connects the upper forming mold component and the lower forming mold component; the hot pressing station is equipped with a paper bottle hot pressing and shaping device, which includes a hot press frame, a hot pressing upper mold component, a hot pressing lower mold component, a pressure-accumulating elastic bag control mechanism, and a hot pressing air source pump. The hot pressing upper mold component is vertically movably mounted on the upper part of the hot press frame, and the hot pressing lower mold component can move horizontally between the paper bottle wet preform forming device and below the hot pressing upper mold component. The hot pressing upper mold component is equipped with a hot pressing upper mold. The hot-pressing die assembly includes a lower hot-pressing mold and a lower heating element. A rear hot-pressing mold is slidably located behind the upper or lower hot-pressing mold. The rear hot-pressing mold is driven by a rear hot-pressing drive device. A pressure-accumulating elastic bag body control mechanism extends into the hot-pressing cavity to apply outward pressure to the wet paper bottle preform when the upper, lower, and rear hot-pressing molds are closed to form the hot-pressing cavity. A hot-pressing air source pump connects the upper and lower hot-pressing mold assemblies. A transfer station is located between the forming station and the hot-pressing station. The upper mold component and the lower hot-pressing mold component can be moved to the transfer station; the upper forming mold component and the lower forming mold component prepare a paper bottle wet blank by closing the mold in the slurry tank. The upper forming mold component and the lower forming mold component leave the slurry tank and separate the mold. The upper forming mold component transfers the paper bottle wet blank adsorbed on it to the lower hot-pressing mold component. The upper hot-pressing mold component and the lower hot-pressing mold component close the mold, and the pressure-accumulating elastic bag control mechanism works and enters the interior of the paper bottle wet blank to apply outward pressure to the paper bottle wet blank, and hot-press the paper bottle wet blank to form a paper bottle product.

[0006] Compared with the prior art, the paper bottle production equipment of the present invention has the following advantages:

[0007] (1) The paper bottle production equipment of the present invention has a paper bottle wet preform forming system, a paper bottle wet preform transfer system, a paper bottle wet preform heating system and a paper bottle shaping and extrusion system, which realizes the automated production of molded bottles using pulp and improves production efficiency;

[0008] (2) The present invention includes a paper bottle wet preform forming device for preparing paper bottle wet preforms, and a paper bottle hot pressing forming device for hot pressing and shaping paper bottle wet preforms into paper bottle products. The forming mold (including upper forming mold, lower forming mold and post forming mold) of the paper bottle wet preform forming device for preparing paper bottle wet preforms and the hot pressing mold (including upper hot pressing mold, lower hot pressing mold and post hot pressing mold) of the paper bottle hot pressing forming device for hot pressing and shaping paper bottle wet preforms both use three molds to define the outer surface of the paper bottle, thereby achieving seamless one-piece forming of paper bottle products, high forming efficiency, and effectively solving the problem that the inverted part is not easy to open the mold, thereby producing paper bottle products with stable quality.

[0009] (3) The paper bottle hot pressing shaping device combines three molds to shape the paper bottle, heat the paper bottle, and internally extrude the paper bottle, so that the pulp is fully strengthened in the mold, which is conducive to improving the molding quality and improving the strength and durability of the bottle.

[0010] Furthermore, the upper forming mold has the same structure as the upper hot pressing mold, the lower forming mold has the same structure as the lower hot pressing mold, the post-forming mold has the same structure as the post-hot pressing mold, and the post-forming drive device has the same structure as the post-hot pressing drive device. The upper forming mold has an upper bottle cavity, an upper bottle mouth communicating with the upper bottle cavity, and an upper rear side channel communicating with the upper bottle cavity at one end facing the lower forming mold. The lower forming mold has a lower bottle cavity, a lower bottle mouth communicating with the lower bottle cavity, and a lower rear side channel communicating with the lower bottle cavity at one end facing the upper forming mold. The post-forming mold is slidably mounted on the lower rear side channel. When the upper forming mold and the lower forming mold are closed, the upper bottle mouth and the lower bottle mouth enclose to form a first mold cavity, the upper bottle cavity and the lower bottle cavity enclose to form a second mold cavity, and the upper rear side channel and the lower rear side channel enclose to form a discharge cavity. The post-forming mold is configured to accommodate the port of the discharge cavity facing the second mold cavity. After molding, the mold is driven by the rear drive device to move to the port of the discharge cavity facing the second mold cavity and to fit with it with a gap; the end of the hot-pressing upper mold facing the hot-pressing lower mold is provided with an upper bottle body cavity, an upper bottle mouth communicating with the upper bottle body cavity, and an upper rear side channel communicating with the upper bottle body cavity; the end of the hot-pressing lower mold facing the hot-pressing upper mold is provided with a lower bottle body cavity, a lower bottle mouth communicating with the lower bottle body cavity, and a lower rear side channel communicating with the lower bottle body cavity; the hot-pressing rear mold is slidably set on the lower rear side channel; when the hot-pressing upper mold and the hot-pressing lower mold are closed, the upper bottle mouth and the lower bottle mouth surround to form a first mold cavity, the upper bottle body cavity and the lower bottle body cavity surround to form a second mold cavity, and the upper rear side channel and the lower rear side channel surround to form a discharge cavity; the hot-pressing rear mold is set to fit the port of the discharge cavity facing the second mold cavity, and the hot-pressing rear mold is driven by the rear drive device to move to the port of the discharge cavity facing the second mold cavity and to fit with it with a gap.

[0011] Furthermore, the lower bottle body cavity, lower bottle mouth, and upper rear channel are horizontally arranged; the upper bottle body cavity, upper bottle mouth, and upper rear channel are respectively arranged corresponding to the lower bottle body cavity, lower bottle mouth, and upper rear channel; or, the upper rear channel is horizontally arranged, and the lower bottle body cavity and lower bottle mouth are inclined upwards towards the upper rear channel; the upper bottle body cavity, upper bottle mouth, and upper rear channel are respectively arranged corresponding to the lower bottle body cavity, lower bottle mouth, and upper rear channel.

[0012] Furthermore, the molded part is provided above the molded part; the upper rear channel is provided with a groove that adapts to the protrusion when the molded part moves to the port of the discharge cavity facing the second mold cavity; the molded part is provided above the hot-pressed part; the upper rear channel is provided with a groove that adapts to the protrusion when the molded part moves to the port of the discharge cavity facing the second mold cavity.

[0013] Furthermore, the upper bottle cavity and the upper bottle mouth are provided with a first wedge-shaped protrusion protruding outward, and the lower bottle cavity and the lower bottle mouth are provided with a second wedge-shaped protrusion protruding outward.

[0014] Furthermore, the pressure-accumulating elastic bag control mechanism includes a support, a tubular component, an elastic bag, a displacement driving device, and a pump. The tubular component is slidably arranged horizontally or inclined upward relative to the support. The tubular component has a hollow tube with several through holes at its end. The elastic bag is fitted over the outside of the tube and covers the through holes. The open end of the elastic bag is sealed and fixed relative to the tube. The displacement driving device is used to drive the tubular component to move towards the outer end of the support, so that the end of the tube with the through holes is located outside the edge of the support end. The pump is used to input fluid into the tube or extract fluid from the tube.

[0015] Furthermore, the paper bottle hot pressing and shaping device also includes a paper bottle mold locking mechanism, which includes an upper locking mold, a lower locking mold, and a rotary drive device. The upper locking mold is disposed on the upper hot pressing mold and includes a plurality of first locking components, each having a first locking end located on the side of the upper hot pressing mold. The lower locking mold is disposed on the lower hot pressing mold and includes a plurality of second locking components, each having a second locking end located on the side of the lower hot pressing mold and aligned with the first locking end. One locking end has a locking groove, and the other locking end has a locking claw. The rotary drive device is located on the upper or lower locking mold and is used to drive the locking components on the mold to rotate. After the upper and lower hot pressing molds are closed, the rotary drive device drives the corresponding locking component to rotate so that the locking claw engages in the locking groove.

[0016] Furthermore, the second locking member has the locking claw on its upper part; the first locking end has an insertion hole at its lower part, and the inner wall of the insertion hole has the locking groove; the insertion hole is adapted to the second locking end.

[0017] Furthermore, the rotary drive device is located on the upper locking mold component, and the upper part of the first locking mold component is provided with a driven gear component; the rotary drive device includes a motor, a mounting bracket, a transmission gear component, a strip-shaped transmission component, and several tensioning components. The motor is fixedly installed relative to the upper part of the first locking mold component through the mounting bracket. The transmission gear component is drivenly connected to the output end of the motor. The transmission gear component is drivenly connected to the driven gear components of several first locking mold components through the strip-shaped transmission component. The strip-shaped transmission component is connected to the outer end face or inner end face of several driven gear components respectively. The tensioning component is located between two adjacent first locking mold components. The tensioning component is used to press against the strip-shaped transmission component so that the part of the strip-shaped transmission component located between the two first locking mold components forms an included angle.

[0018] Furthermore, the upper forming mold component includes a upper forming mold moving mechanism, a first forming horizontal driving device, and a first forming vertical driving device. The upper forming mold moving mechanism is horizontally arranged relative to the forming frame and extends from the forming station to the transfer station. The upper forming mold is mounted on the upper forming mold moving mechanism via the first forming vertical driving device. The first forming horizontal driving device drives the upper forming mold to reciprocate along the setting direction of the upper forming mold moving mechanism, and the first forming vertical driving device drives the upper forming mold to reciprocate vertically. The lower forming mold component includes a second forming vertical driving device. The lower forming mold is mounted on the forming frame via the second forming vertical driving device, which drives the upper forming mold to reciprocate vertically. The forming lower mold reciprocates vertically; the hot pressing upper mold component includes a first hot pressing vertical drive device, which is mounted on the hot press frame and drives the hot pressing upper mold to reciprocate vertically; the hot pressing lower mold component includes a hot pressing lower mold moving mechanism and a first hot pressing horizontal drive device, which is horizontally positioned relative to the hot press frame and extends from the hot pressing station to the transfer station, and drives the hot pressing upper mold to reciprocate along the setting direction of the hot pressing lower mold moving mechanism; the forming upper mold and the hot pressing lower mold move to the transfer station respectively, and the forming upper mold descends to close with the hot pressing lower mold to transfer the wet paper bottle preform. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of a paper bottle hot-pressing and shaping device;

[0021] Figure 3 This is a side view of the paper bottle hot-pressing and shaping device;

[0022] Figure 4 This is a schematic diagram showing the closed state of the upper mold, lower mold, and rear mold;

[0023] Figure 5It is an exploded view of the upper mold, lower mold, and rear mold;

[0024] Figure 6 It is a sectional view of the upper mold, lower mold, and rear mold;

[0025] Figure 7 This is a schematic diagram of the upper mold;

[0026] Figure 8 This is a schematic diagram of the lower mold and the rear mold;

[0027] Figure 9 This is a schematic diagram of the rear mold;

[0028] Figure 10 This is a schematic diagram of the first state of the pressure-accumulating elastic bag control mechanism (the elastic bag is in its natural state).

[0029] Figure 11 This is a schematic diagram of the second state of the pressure-accumulating elastic bag control mechanism (the elastic bag is in an inflated state).

[0030] Figure 12 This is a cross-sectional view of the pressure-accumulating elastic bag control mechanism;

[0031] Figure 13 This is a schematic diagram of a tubular component (with a hidden elastic pocket).

[0032] Figure 14 This is a schematic diagram of the first angle of the paper bottle mold locking mechanism;

[0033] Figure 15 This is a schematic diagram of the second angle of the paper bottle mold locking mechanism;

[0034] Figure 16 This is a schematic diagram of the mold-closing mechanism of a paper bottle mold during mold separation.

[0035] Figure 17 This is a schematic diagram of the first and second mold-locking components;

[0036] Figure 18 This is a sectional view of the first and second mold-locking components.

[0037] Label Explanation:

[0038] Paper bottle hot pressing and shaping device 1, pressure accumulating elastic bag body control mechanism 2, hot pressing upper mold component 3, hot pressing lower mold component 4, hot press frame 5, paper bottle wet blank forming device 6, forming frame 7, forming upper mold component 8, first hot pressing vertical drive device 9, forming upper mold moving mechanism 10, first forming horizontal drive device 11, first forming vertical drive device 12, receiving plate 13, hot pressing lower mold moving mechanism 14, first hot pressing horizontal drive device 15;

[0039] Upper mold a1, upper bottle body cavity a2, upper bottle mouth a3, upper rear side channel a4, upper slot a5, first wedge-shaped protrusion a6, lower mold a7, lower bottle body cavity a8, lower bottle mouth a9, lower rear side channel a10, lower slot a11, second wedge-shaped protrusion a12, rear mold a13, slide a14, protrusion a15, protrusion a16, first mold cavity a17, second mold cavity a18, discharge cavity a19, extension cavity a20, guide a21, slot a22, limiting member a23, limiting block a24;

[0040] Support b1, height adjustment component b2, pipe component b3, pipe body b4, through hole b5, fixing ring b6, mounting ring b7, connector b8, outward expansion part b9, sealing component b10, elastic bag body b11, sealing part b12, slide b13, slide rail b14, clamp b15, upper clamping component b16, lower clamping component b17, fastener b18, upper notch b19, lower notch b20, fixing component b21, positioning component b22, sleeve b23;

[0041] Upper locking mold c1, upper locking mold frame c2, first locking mold component c3, first locking end c4, locking groove c5, insertion hole c6, driven gear component c7, rotary drive device c8, motor c9, mounting bracket c10, transmission gear component c11, strip transmission component c12, tensioning component c13, guide surface c14, lower locking mold c15, lower locking mold frame c16, second locking mold component c17, second locking end c18, locking claw c19, tension adjustment mechanism c20, mounting base c21, sliding base c22, tensioning wheel c23, fastening component c24, adjusting component c25, adjusting component c26, adjusting component fixing base c27, locking block c28, inclined surface c29, sliding groove c30;

[0042] Hot pressing upper mold d1, hot pressing lower mold d2, hot pressing rear mold d3. Detailed Implementation

[0043] The embodiments of the present invention are described below with reference to the accompanying drawings:

[0044] Example 1

[0045] See Figures 1 to 18The paper bottle production equipment of this embodiment includes a forming station, a hot pressing station, and a transfer station. The forming station is equipped with a paper bottle wet preform forming device 6, which includes a forming frame 7, a slurry tank (not shown in the figure), an upper forming mold component 8, a lower forming mold component (not shown in the figure), and a forming air source pump body (not shown in the figure). The slurry tank is located at the lower part of the forming frame 7. The lower forming mold component is equipped with a lower forming mold and is vertically movable within the slurry tank. The upper forming mold component 8 is vertically and horizontally movable above the slurry tank and is equipped with an upper forming mold (not shown in the figure). The rear part of the upper forming mold or the rear part of the lower forming mold slides. A post-forming mold is provided (in this embodiment, the post-forming mold is slidably provided at the rear of the lower forming mold), and the post-forming mold is driven by a post-forming drive device (not shown in the figure); a forming air source pump body is connected to the upper forming mold component 8 and the lower forming mold component; a hot pressing station is provided with a paper bottle hot pressing and shaping device 1, which includes a hot pressing frame 5, a hot pressing upper mold component 3, a hot pressing lower mold component 4, a pressure-accumulating elastic bag body control mechanism 2, and a hot pressing air source pump body (not shown in the figure). The hot pressing upper mold component 3 is vertically movably arranged on the upper part of the hot pressing frame 5, and the hot pressing lower mold component 4 can move horizontally between the paper bottle wet preform forming device 6 and the area below the hot pressing upper mold component 3. Part 3 is provided with an upper hot-pressing mold d1 and an upper heating element (not shown in the figure), and the lower hot-pressing mold component 4 is provided with a lower hot-pressing mold d2 and a lower heating element (not shown in the figure). A rear hot-pressing mold d3 is slidably provided at the rear of the upper hot-pressing mold d1 or the rear of the lower hot-pressing mold d2 (in this embodiment, the rear hot-pressing mold d3 is slidably provided at the rear of the lower hot-pressing mold d2). The rear hot-pressing mold d3 is driven to move by the rear hot-pressing drive device. The pressure-accumulating elastic bag body control mechanism 2 is used to extend into the hot-pressing cavity to apply outward pressure to the wet paper bottle blank when the upper hot-pressing mold d1, the lower hot-pressing mold d2, and the rear hot-pressing mold d3 are closed to form a hot-pressing cavity. The hot-pressing air source pump body is connected to the upper hot-pressing mold component. The upper forming mold 8 and the lower hot pressing mold 4 are arranged in a transfer station between the forming station and the hot pressing station. The upper forming mold 8 and the lower hot pressing mold 4 can be moved to the transfer station. The upper forming mold 8 and the lower forming mold 4 prepare a paper bottle wet blank by closing the mold in the slurry tank. The upper forming mold 8 and the lower forming mold 4 leave the slurry tank and separate the molds. The upper forming mold 8 transfers the paper bottle wet blank adsorbed on it to the lower hot pressing mold 4. The upper hot pressing mold 3 and the lower hot pressing mold 4 close the mold, and the pressure-accumulating elastic bag control mechanism 2 works and enters the interior of the paper bottle wet blank to apply outward pressure to the paper bottle wet blank, and hot pressing the paper bottle wet blank to form a paper bottle product.

[0046] In this embodiment, multiple sets of forming molds can be provided between the upper forming mold component 8 and the lower forming mold component. Multiple sets of hot pressing molds are provided between the upper hot pressing mold component 3 and the lower hot pressing mold component 4 corresponding to the multiple sets of forming molds. The pressure-accumulating elastic bag body control mechanism 2 is provided with multiple extension ends that extend into the hot pressing molds corresponding to the multiple sets of hot pressing molds. The multiple extension ends are driven by the same driving device.

[0047] In other embodiments, two paper bottle hot pressing and shaping devices 1 can be provided. The two paper bottle hot pressing and shaping devices 1 are located in the same vertical plane, and the vertical plane where the two paper bottle hot pressing and shaping devices 1 are located is perpendicular to the paper bottle wet blank forming device 6. The paper bottle wet blanks prepared by the paper bottle wet blank forming device 6 are alternately input into the two paper bottle hot pressing and shaping devices 1 for hot pressing and shaping.

[0048] The upper forming mold component 8 includes an upper forming mold moving mechanism 10, a first forming horizontal driving device 11, and a first forming vertical driving device 12. The upper forming mold moving mechanism 10 is horizontally arranged relative to the forming frame 7 and extends from the forming station to the transfer station. The upper forming mold is mounted on the upper forming mold moving mechanism 10 via the first forming vertical driving device 12. The first forming horizontal driving device 11 drives the upper forming mold to reciprocate along the setting direction of the upper forming mold moving mechanism 10, and the first forming vertical driving device 12 drives the upper forming mold to reciprocate vertically. The lower forming mold component includes a second forming vertical driving device (not shown in the figure). The lower forming mold is mounted on the forming frame 7 via the second forming vertical driving device, which drives the upper forming mold to reciprocate vertically. The lower mold moves back and forth in the vertical direction; the upper hot press mold component 3 includes a first hot press vertical drive device 9, the upper hot press mold d1 is set on the hot press frame 5 through the first hot press vertical drive device 9, the first hot press vertical drive device 9 is used to drive the upper hot press mold d1 to move back and forth in the vertical direction; the lower hot press mold component 4 includes a lower hot press mold moving mechanism 14 and a first hot press horizontal drive device 13, the lower hot press mold moving mechanism 14 is set horizontally relative to the hot press frame 5 and extends from the hot press station to the transfer station, the first hot press horizontal drive device 13 is used to drive the lower hot press mold d2 to move back and forth along the setting direction of the lower hot press mold moving mechanism 14; the upper mold and the lower hot press mold d2 move to the transfer station respectively, the upper mold descends and closes with the lower hot press mold d2 to transfer the wet paper bottle preform.

[0049] The upper mold moving mechanism 10, the first horizontal molding drive device 11, the first vertical molding drive device 12, the second vertical molding drive device, the first hot pressing vertical drive device 9, the lower mold moving mechanism 14, and the first horizontal hot pressing drive device 13 are common mechanical structures in paper molding production equipment, and will not be described in detail here.

[0050] The paper bottle hot pressing and shaping device 1 also includes a receiving plate 13, which can move horizontally below the hot pressing upper mold component 3 and outside the hot pressing frame 5. After the paper bottle hot pressing and shaping device 1 heats and shapes the paper bottle wet blank into a paper bottle product, the hot pressing lower mold component 4 releases the negative pressure applied to the hot pressing cavity so that the paper bottle wet blank is attached to the hot pressing upper mold d1. The receiving plate 13 moves to align with the hot pressing upper mold component 3, and the paper bottle product is transferred to the receiving plate 13.

[0051] In this embodiment, the receiving plate 13 is fixedly connected to the lower hot pressing mold d2, so that when the wet paper bottle blank is transferred into the lower hot pressing mold d2, the receiving plate 13 is used to receive the paper bottle product demolded from the upper hot pressing mold d1, and when the lower hot pressing mold d2 and the upper hot pressing mold d1 are aligned, the receiving plate 13 transports the paper bottle product to the outside of the paper bottle hot pressing shaping device 1, thereby improving production efficiency.

[0052] The upper forming mold and the upper hot pressing mold d1 have the same structure; the lower forming mold and the lower hot pressing mold d2 have the same structure; the post forming mold and the post hot pressing mold d3 have the same structure; and the post forming drive device and the post hot pressing drive device have the same structure. Both types of post drive devices can be cylinders or lead screw motors.

[0053] To briefly describe the structure of the upper forming mold, the upper hot pressing mold d1, the lower forming mold, the lower hot pressing mold d2, the lower forming mold, and the lower hot pressing mold d3, the upper forming mold and the upper hot pressing mold d1 will be collectively referred to as the upper mold, the lower forming mold and the lower hot pressing mold d2 will be collectively referred to as the lower mold, and the lower forming mold and the lower hot pressing mold d3 will be collectively referred to as the lower mold.

[0054] The upper mold a1 has an upper bottle cavity a2, an upper bottle mouth a3 connecting to the upper bottle cavity a2, and an upper rear side channel a4 connecting to the upper bottle cavity a2 at one end facing the lower mold a7; the lower mold a7 has a lower bottle cavity a8, a lower bottle mouth a9 connecting to the lower bottle cavity a8, and a lower rear side channel a10 connecting to the lower bottle cavity a8 at one end facing the upper mold a1; the rear mold a13 is slidably mounted on the lower rear side channel a10; when the upper mold a1 and the lower mold a7 are closed, the upper bottle mouth... Cavity a3 and lower bottle mouth a9 enclose to form first mold cavity a17, upper bottle body cavity a2 and lower bottle body cavity a8 enclose to form second mold cavity a18, upper rear side channel a4 and lower rear side channel a10 enclose to form discharge cavity a19; rear mold a13 is configured to adapt to the port of discharge cavity a19 facing the second mold cavity a18, and rear mold a13 is driven by rear drive device (not shown in the figure) to move to the port of discharge cavity a19 facing the second mold cavity a18 and to fit with it with clearance.

[0055] In one embodiment, the end face of the rear mold a13 facing the second mold cavity a18 is a plane.

[0056] In another embodiment, the end face of the rear mold a13 facing the second mold cavity a18 is a curved surface, or the middle part of the end face of the rear mold a13 facing the second mold cavity a18 is a plane, and the edge of the plane is a curved surface.

[0057] The rear mold a13, with the above-mentioned setting, can make the bottom center of the paper bottle product concave inward. On the one hand, it reduces the contact area between the bottom of the paper bottle product and the placement surface, improving the stability of the bottom of the paper bottle product when it is placed. On the other hand, it can improve the structural strength of the bottom of the paper bottle product.

[0058] In one embodiment, the lower bottle body cavity a8, the lower bottle mouth cavity a9, and the upper rear side channel a4 are horizontally arranged; the upper bottle body cavity a2, the upper bottle mouth cavity a3, and the upper rear side channel a4 are respectively arranged corresponding to the lower bottle body cavity a8, the lower bottle mouth cavity a9, and the upper rear side channel a4.

[0059] In another embodiment, the upper rear channel a4 is horizontally arranged, and the lower bottle cavity a8 and the lower bottle mouth a9 are inclined upward in the direction of the upper rear channel a4; the upper bottle cavity a2, the upper bottle mouth a3 and the upper rear channel a4 are respectively arranged corresponding to the lower bottle cavity a8, the lower bottle mouth a9 and the upper rear channel a4.

[0060] The lower bottle body cavity a8 and the lower bottle oral cavity a9 are set at an angle, which has the following beneficial effects:

[0061] (1) During the process of forming the wet preform of the paper bottle, since the lower bottle body cavity a8 and the lower bottle mouth cavity a9 are inclined, the pulp first fills the first mold cavity a17 and then fills the second mold cavity a18. The pulp is absorbed from bottom to top and fills the inner wall of the first mold cavity a17, the second mold cavity a18 and the end of the rear mold a13 facing the second mold cavity a18, thus ensuring that the pulp is filled thickly.

[0062] (2) During the process of forming the paper bottle wet preform, when the paper bottle wet preform is dehydrated, the water in the paper bottle wet preform is concentrated at the port of the first mold cavity a17 under the action of gravity, which makes it easier for the water to be absorbed and improves the dehydration effect.

[0063] (3) During the hot pressing and shaping of paper bottles, when the wet paper bottle blank is heated and dried, the moisture turns into steam and is quickly discharged into the discharge cavity a19 along the guide of the inclined first mold cavity a17 and the second mold cavity a18, thereby improving the drying effect.

[0064] (4) During the hot pressing and shaping of paper bottles, the moisture in the wet paper bottle blank is concentrated at the port of the first mold cavity a17 under the action of gravity. Since the thickness of the lower mold a7 at the port of the first mold cavity a17 is relatively thin, the heat conduction effect at this point is fast, so the moisture concentrated at the port of the first mold cavity a17 can be quickly evaporated, thereby improving the drying efficiency.

[0065] Specifically, the tilt angles of the lower bottle body cavity a8 and the lower bottle oral cavity a9 are 10-60°, and the tilt angles of the lower bottle body cavity a8 and the lower bottle oral cavity a9 are the same.

[0066] If the tilt angle of the lower bottle body cavity a8 and the lower bottle mouth cavity a9 is less than 10°, the flow of pulp and water will be insufficient due to the insufficient tilt angle, and the above-mentioned technical effect cannot be achieved. If the tilt angle of the lower bottle body cavity a8 and the lower bottle mouth cavity a9 is greater than 60°, it will increase the processing difficulty and mold closing difficulty of the mold, and increase the demolding difficulty.

[0067] Furthermore, the rear mold a13 is provided with a slide a14 adapted to the lower rear channel a10, and the slide a14 is provided with protrusions a15 on both sides; the lower rear channel a10 is provided with a limiting member a23 above the protrusions a15, and the limiting member a23 is used to limit the range of movement of the protrusions a15 in the vertical direction and limit the range of movement of the rear mold a13 in the horizontal direction.

[0068] The above configuration can strengthen the connection between the rear mold a13 and the rear channel it is located in, while ensuring that the rear mold a13 reciprocates along the specified moving direction, thus ensuring its forming / shaping effect on the bottom of the paper mold.

[0069] Specifically, a limiting block a24 is provided on the rear side of the lower rear channel a10 to restrict the rear mold a13 from disengaging from the lower rear channel a10, and the output end of the rear drive device passes through the limiting block a24 to connect to the rear mold a13.

[0070] Furthermore, the rear mold a13 is disposed on the lower rear channel a10, and a protrusion a16 is provided above the rear mold a13; the upper rear channel a4 is provided with a slot a22 that adapts to the protrusion a16 at the position corresponding to the position when the rear mold a13 moves to the port of the discharge cavity a19 facing the second mold cavity a18.

[0071] The protrusion a16 and the slot a22 enable the three molds to cooperate and fit together tightly, thereby reducing the gap between the three molds and improving the precision of the paper mold.

[0072] In other embodiments, the rear mold a13 is slidably disposed on the upper rear channel a4, and a protrusion a16 is provided below the rear mold a13; the lower rear channel a10 is provided with a slot a22 that adapts to the protrusion a16 at the position corresponding to the position when the rear mold a13 moves to the port of the discharge cavity a19 facing the second mold cavity a18.

[0073] Specifically, the upper mold a1 has an upper slot a5 at its front end that connects to the upper bottle cavity a3, and the lower mold a7 has a lower slot a11 at its front end that connects to the lower bottle cavity a9; when the upper mold a1 and the lower mold a7 are closed, the upper slot a5 and the lower slot a11 enclose each other to form an extension cavity a20.

[0074] The extension cavity a20 is designed to leave a distance between the first mold cavity a17 and the port of the paper bottle mold 1, so that the front end of the bottle mouth of the manufactured paper bottle product has an extension end, which facilitates the subsequent processing and trimming of the bottle mouth of the dried paper bottle product and provides aesthetics to the bottle mouth.

[0075] Furthermore, the upper bottle cavity a2 and the lower bottle cavity a8 are bent inward at the end near the rear mold a13 to form a guide part a21. When the upper mold a1 and the lower mold a7 are closed, the guide part a21 is aligned with the outer side of the end face of the rear mold a13 facing the second mold cavity a18.

[0076] The above arrangement makes the port edge of the second mold cavity a18 near the discharge cavity a19 form a smooth curved surface with the end face of the rear mold a13 facing the second mold cavity a18. On the one hand, it improves the aesthetics of the bottom of the paper bottle product, and on the other hand, it avoids the appearance of right angles on the bottom of the paper bottle product, which would affect the vertical placement of the paper bottle product.

[0077] Furthermore, the upper bottle cavity a2 and the upper bottle mouth a3 are provided with outwardly protruding first wedge-shaped protrusions a6, and the lower bottle cavity a8 and the lower bottle mouth a9 are provided with outwardly protruding second wedge-shaped protrusions a12; when the upper mold a1 and the lower mold a7 are closed, the first wedge-shaped protrusions a6 and the second wedge-shaped protrusions a12 engage.

[0078] When the upper mold a1 and the lower mold a7 are closed, the first wedge-shaped protrusion a6 and the second wedge-shaped protrusion a12 engage. On the one hand, the engagement of the tops of the two wedge-shaped protrusions makes the parting line of the upper mold a1 and the lower mold a7 as small as possible. Compared with ensuring the flatness of the engagement plane of the upper mold a1 and the lower mold a7, it is relatively easier to set the first wedge-shaped protrusion a6 and the second wedge-shaped protrusion a12 to have a high flatness. On the other hand, after the first wedge-shaped protrusion a6 and the second wedge-shaped protrusion a12 engage, an airflow channel is formed on the outside of the first wedge-shaped protrusion a6 and the second wedge-shaped protrusion a12, which facilitates negative pressure and air blowing operations during the forming of paper bottle wet blanks and the hot pressing of paper bottles, thereby improving the efficiency of slurry suction, dewatering, drying and demolding.

[0079] In this embodiment, the rear drive device is mounted on the upper mold mounting bracket (not shown in the figure) or the lower mold mounting bracket (not shown in the figure) of the paper bottle wet preform forming device / paper bottle hot pressing shaping device using the paper bottle mold 1 of the present invention.

[0080] The upper mold a1, lower mold a7, and rear mold a13 are set up, and the upper bottle body cavity a2 and upper bottle mouth cavity a3 are set on the upper mold a1, and the lower bottle body cavity a8 and lower bottle mouth cavity a9 are set on the lower mold a7. Thus, the corresponding structures are set for the bottle mouth, bottle body, and bottle bottom of the paper bottle. After the above paper bottle mold 1 is applied to the paper bottle wet preform forming device / paper bottle hot pressing forming device, the seamless one-piece forming of paper bottle wet preform / paper bottle product can be realized. The forming efficiency is high, and the wall thickness and drying of different areas are uniform. It also effectively solves the problem that the mold opening of the inverted position is not easy, so as to produce paper bottle products with stable quality. The discharge cavity a19 is used to discharge slurry, water and steam at different stages of paper mold product making.

[0081] The pressure-accumulating elastic bag control mechanism 2 includes a support b1, a tube component b3, an elastic bag b11, a displacement driving device, and a pump (not shown in the figure). The tube component b3 is slidably arranged horizontally or obliquely upward relative to the support b1. The tube component b3 has a hollow tube body b4, and the end of the tube body b4 has several through holes b5. The elastic bag b11 is sleeved on the outside of the tube body b4 and covers the through holes b5. The open end of the elastic bag b11 is sealed and fixed relative to the tube body b4. The displacement driving device is used to drive the tube component b3 to move towards the outer end of the support b1, so that the end of the tube body b4 with the through holes b5 is located outside the edge of the end of the support b1. The pump is used to input fluid into the tube body b4 or to extract fluid from the tube body b4.

[0082] Furthermore, the pipe component b3 includes the pipe body b4, the fixing ring b6, the mounting ring b7, and the connector b8. The connector b8 is located at the other end of the pipe body b4 relative to the through hole b5. The pump body is connected to the connector b8. The fixing ring b6 is fixedly installed on the pipe body b4 near the through hole b5. The mounting ring b7 is sleeved on the outside of the elastic bag b11 and cooperates with the outer wall of the pipe body b4 to fix the elastic bag b11. The mounting ring b7 is fixedly connected to the fixing ring b6.

[0083] The above-mentioned setup uses the mounting ring b7 to fix the elastic bag b11 to the outside of the tube body b4, and then fixes the mounting ring b7 to the fixing ring b6 which is fixed to the tube body b4, so that production personnel can easily set the elastic bag b11 to the outside of the tube component b3.

[0084] Furthermore, the diameter of the tube body b4 near the through hole b5 gradually increases from the end near the through hole b5 toward the rear to form an outer expansion portion b9; the inner wall of the mounting ring b7 is adapted to the outer wall of the outer expansion portion b9.

[0085] Specifically, the mounting ring b7 is provided with a sleeve b23 extending towards the through hole b5. The sleeve b23 is fitted onto the outer wall of the outer expansion portion b9 and fixes the outer side of the opening end of the elastic bag body b11.

[0086] The above-mentioned arrangement allows the open end of the elastic bag body b11 to be easily fitted onto the end of the tube body b4 with the through hole b5, and also allows the mounting ring b7 to fit tightly with the outward expansion part b9 on the tube body b4, thereby firmly clamping the elastic bag body b11 and preventing the elastic bag body b11 from loosening.

[0087] Furthermore, a sealing element b10 is provided between the mounting ring b7 and the tube body b4; the open end of the elastic bag body b11 is provided with an inwardly folded sealing part b12.

[0088] The sealing part b12 on the seal b10 and the elastic bag b11 can improve the sealing between the tube body b4, the mounting ring b7 and the elastic bag b11, and prevent fluid from flowing out from the gap between the tube body b4, the mounting ring b7 and the elastic bag b11.

[0089] Furthermore, the diameter of the through hole b5 located on the inner wall of the tube body b4 is smaller than its diameter located on the outer wall of the tube body b4.

[0090] The above-mentioned arrangement makes the through hole b5 funnel-shaped, so that the fluid flows out of the through hole b5 in a radial manner. On the one hand, it avoids the fluid from flowing out in a concentrated manner and causing a large impact. On the other hand, it can make the expansion speed of the elastic bag body b11 uniform, ensuring that different areas of the paper bottle preform are subjected to uniform force, and improving the drying effect of the elastic bag body b11 on the paper bottle preform.

[0091] Furthermore, it also includes a slide block b13 and a slide rail b14, the slide rail b14 is mounted on the bracket b1, the slide block b13 is slidably connected to the slide rail b14, and the tubular component b3 is fixed on the slide block b13.

[0092] The arrangement of slide block b13 and slide rail b14 can improve the smoothness of the lateral sliding of tube component b3 relative to support b1 and extend the service life of the device.

[0093] Furthermore, a clamp b15 is fixedly mounted on the slide b13, and the clamp b15 is fixedly connected to the tube component b3.

[0094] By setting the clamp b15 to fix the pipe component b3 on the slide b13, production personnel can easily install the pipe component b3 onto the slide b13 or remove the pipe component b3 from the slide b13 by installing / removing the clamp b15.

[0095] Furthermore, the clamp b15 includes an upper clamping member b16, a lower clamping member b17, and a fastener b18. The lower clamping member b17 is fixedly connected to the slide b13. The upper clamping member b16 is detachably mounted on the upper end of the lower clamping member b17 via the fastener b18. The upper clamping member b16 and the lower clamping member b17 are respectively provided with an upper notch b19 and a lower notch b20 on the opposite surfaces of the pipe component b3. The upper notch b19 and the lower notch b20 surround and clamp the pipe component b3.

[0096] The clamp b15 adopts a split design, which consists of three parts: upper clamping part b16, lower clamping part b17 and fastener b18, which facilitates disassembly and assembly and reduces the difficulty for production personnel to install and remove pipe component b3.

[0097] Furthermore, it also includes a pipe component fixing mechanism; the pipe component fixing mechanism includes a fixing member b21 and a positioning member b22 disposed on the bracket b1. The positioning member b22 is configured to maintain a distance from the slide b13 when the end of the pipe component b3 with the through hole b5 moves outside the edge of the bracket b1; when the end of the pipe component b3 with the through hole b5 moves outside the edge of the bracket b1, the positioning member b22 and the clamp b15 are connected by the fixing member b21 to limit the movement range of the slide b13.

[0098] Specifically, fastener b21 consists of a nut and a screw or bolt.

[0099] Since the present invention needs to be inspected and the mold of the paper bottle hot pressing and shaping device needs to be tested, by setting up the tube component fixing mechanism, the tube component b3 can be fixed in the above two situations, thereby reducing the maintenance difficulty or reducing the steps required for equipment testing, reducing the operation difficulty of the present invention, and reducing maintenance / debugging costs.

[0100] In other embodiments, the pipe member fixing mechanism is configured to connect the positioning member b22 and the slide b13 via the fixing member b21 to limit the range of movement of the slide b13. The accompanying drawings of this improved embodiment are not shown in this specification, but this improved embodiment still falls within the protection scope of the claims of this invention.

[0101] Specifically, the bottom of the bracket b1 is provided with a number of height adjustment components b2, which are spaced apart. The height of the upper surface of the bracket b1 relative to the horizontal plane can be adjusted by adjusting the number of height adjustment components b2.

[0102] Specifically, the height adjustment component b2 consists of a nut and a screw or bolt.

[0103] The displacement driving device includes a cylinder (not shown in the figure), and the output end of the displacement driving device is connected to the slide b13. Alternatively, the displacement driving device includes a drive motor (not shown in the figure) and a lead screw (not shown in the figure), the lead screw is arranged parallel to the guide rail, the slide b13 is connected to the nut on the lead screw, and the drive motor is used to drive the lead screw to rotate.

[0104] The pressure-accumulating elastic bag control mechanism of the present invention has the following beneficial effects:

[0105] (1) The present invention has a tube component b3 slidably disposed on a support b1. The tube component b3 is driven by a displacement driving device to move to the outer end of the support b1, so that the end of the tube body b4 with a through hole b5 is located outside the front edge of the support b1 so as to be inserted into the mold (after the hot pressing upper mold and hot pressing lower mold are closed). The tube component b3 includes a hollow tube body b4 with several through holes b5 at the end. The elastic bag body b11 is sleeved on the outside of the tube body b4 and covers the through holes b5. When the pump body fills the elastic bag body b11 with fluid, the fluid contacts the inner cavity of the tube body b4 and flows along the inner wall of the tube body b4 to the through hole b5 and then flows into the elastic bag body b11. The elastic bag body b11 expands and applies high pressure to the inside of the blank so that the blank is tightly attached to the inner wall of the mold cavity.

[0106] (2) The elastic bag body b11 of the present invention carries high pressure gas or liquid. The present invention controls the pressure increase, storage and release through the pump body, so that the elastic bag body b11 can switch between the natural state and the expanded state, and can deform the elastic bag body b11 from the contracted state to the corresponding shape required by the process, so as to realize the elastic bag body b11 can freely enter and exit the interior of the paper mold product.

[0107] (3) The present invention can quickly, continuously and cyclically switch the elastic bag body b11 between the natural state and the inflated state, thereby improving production efficiency.

[0108] The paper bottle hot pressing and shaping device 1 also includes a paper bottle mold locking mechanism, including an upper locking mold c1, a lower locking mold c15, and a rotary drive device c8. The upper locking mold c1 is disposed on the upper hot pressing mold d1 and includes a plurality of first locking components c3, each having a first locking end c4 located on the side of the upper hot pressing mold d1. The lower locking mold c15 is disposed on the lower hot pressing mold d2 and includes a plurality of second locking components c17. c17 has a second locking end c18 located on the side of the hot-pressing lower mold d2 and aligned with the first locking end c4; one locking end is provided with a locking groove c5, and the other locking end is provided with a locking claw c19; the rotary drive device c8 is located on the upper locking mold c1 or the lower locking mold c15 and is used to drive the locking mold component on the locking mold component to rotate; after the hot-pressing upper mold d1 and the hot-pressing lower mold d2 are closed, the rotary drive device c8 drives the corresponding locking mold component to rotate so that the locking claw c19 is engaged in the locking groove c5.

[0109] Specifically, the first mold-locking component c3 is connected to the upper hot-pressing mold d1 via a bearing (not shown in the figure), and the second mold-locking component c17 is fixedly connected to the lower hot-pressing mold d2.

[0110] In this embodiment, the first locking end c4 is provided with the locking groove c5, the second locking end c18 is provided with the locking claw c19, and the rotation drive device c8 is located on the upper locking module c1.

[0111] Furthermore, the second locking member c17 has the locking claw c19 on its upper part; the first locking end c4 has an insertion hole c6 on its lower part, and the inner sidewall of the insertion hole c6 has the locking groove c5; the insertion hole c6 is adapted to the second locking end c18.

[0112] Furthermore, there are two locking claws c19, which are arranged opposite to each other on both sides of the second locking mold member c17; there are two locking grooves c5, which are arranged opposite to each other on the inner sidewall of the insertion hole c6.

[0113] By setting the locking groove c5 on the inner wall of the insertion hole c6, the present invention can ensure the structural strength of the locking groove c5 and protect it. In addition, by setting two locking claws c19 and two locking grooves c5 that are adapted to them, two fixing points are provided, which improves the locking strength of the first locking mold member c3 and the second locking mold member c17 and prevents the first locking mold member c3 and the second locking mold member c17 from loosening after being impacted.

[0114] Specifically, locking blocks c28 are provided on both sides of the insertion hole c6, and the locking groove c5 is formed between the inner end face of the locking block c28 and the bottom wall of the insertion hole c6.

[0115] Furthermore, the rotary drive device c8 is located on the upper locking mold c1, and the upper part of the first locking mold component c3 is provided with a driven gear component c7; the rotary drive device c8 includes a motor c9, a mounting frame c10, a transmission gear component c11, a strip-shaped transmission component c12, and several tensioning components c13. The motor c9 is fixedly mounted relative to the upper part of the first locking mold component c3 through the mounting frame c10. The transmission gear component c11 is drivenly connected to the output end of the motor c9. The transmission gear component c11 is drivenly connected to several driven gear components c7 of the first locking mold component c3 through the strip-shaped transmission component c12; the strip-shaped transmission component c12 is respectively connected to the outer end face of several driven gear components c7 (see Figure 1 ) or inner end face (see Figure 6 The tensioning member c13 is located between two adjacent first mold-locking members c3. The tensioning member c13 is used to press against the strip-shaped transmission member c12 so that the portion of the strip-shaped transmission member c12 located between the two first mold-locking members c3 forms an included angle.

[0116] Specifically, the two adjacent tensioning members c13 are configured such that the included angle between the first locking member c3 and the first and last points of the strip-shaped transmission member c12 is no greater than 90°.

[0117] The rotary drive device c8 has few parts, a simple structure, low cost, and is easy to assemble and maintain. When the strip-shaped transmission component c12 is connected to the outer or inner end faces of several driven gear components c7, the effective contact area between the driven gear component c7 and the strip-shaped transmission component c12 is limited. If the effective contact area between the driven gear component c7 and the strip-shaped transmission component c12 is small, it will be impossible to accurately control the rotation of the first mold-locking component c3. By setting the tensioning component c13, the part of the strip-shaped transmission component c12 located between the two first mold-locking components c3 forms an included angle, thereby increasing the area of ​​contact between the strip-shaped transmission component c12 and the driven gear component c7, and improving the reliability of the rotary drive device c8.

[0118] Specifically, the driven gear component c7 and the transmission gear component c11 are gears or sprockets, and the bar-shaped transmission component c12 is a chain or belt.

[0119] Furthermore, the end of the tensioning member c13 that presses against the strip-shaped transmission member c12 is a guide surface c14, and the guide surface c14 is a circular arc convex surface.

[0120] The above configuration can prevent the tensioning component c13 from causing wear on the bar-shaped transmission component c12, thereby extending the service life of the bar-shaped transmission component c12.

[0121] Furthermore, the rotary drive device c8 also includes a tension adjustment mechanism c20, which includes a mounting base c21, a sliding base c22, and a tension wheel c23. The mounting base c21 is disposed on the hot press upper mold d1. The tension wheel c23 is disposed on the mounting base c21 via the sliding base c22 and is at the same horizontal plane as the strip-shaped transmission member c12. The tension wheel c23 abuts against the outer end face or inner end face of the strip-shaped transmission member c12. The sliding base c22 or the mounting base c21 is provided with a sliding groove c30. The sliding base c22 and the mounting base c21 are fixedly connected by a fastener c24 inserted into the sliding groove c30.

[0122] Specifically, fastener C24 is a screw or bolt.

[0123] Specifically, the tension adjustment mechanism c20 also includes an adjustment component c25, which includes an adjustment element c26 and an adjustment element fixing seat c27. The adjustment element fixing seat c27 is disposed on the mounting seat c21 and located on a straight line along the length direction of the sliding seat c22. The end of the adjustment element fixing seat c27 is away from the sliding seat c22 and close to the strip-shaped transmission element c12. The adjustment element c26 is horizontally screwed to the end of the adjustment element fixing seat c27 facing the sliding seat c22. The adjustment element c26 is used to apply a force to the sliding seat c22 in the direction of pushing the strip-shaped transmission element c12.

[0124] The tension adjustment mechanism c20 ensures that the strip-shaped transmission component c12 remains taut, preventing the slack of the strip-shaped transmission component c12 from affecting the rotation of the first mold-locking component c3 driven by the rotary drive device c8.

[0125] Furthermore, the upper locking mold c1 also includes an upper locking mold frame c2, which is installed on the upper end face of the hot pressing upper mold d1. Several first locking mold components c3 and a rotary drive device c8 are located on the upper locking mold frame c2. The first locking mold components c3 are axially rotatable relative to the upper locking mold frame c2. The lower locking mold c15 also includes a lower locking mold frame c16, which is installed on the lower end face of the hot pressing lower mold d2. Several second locking mold components c17 are located on the lower locking mold frame c16.

[0126] The upper locking mold base c2 and the lower locking mold base c16 facilitate production personnel to quickly install the upper locking mold c1 and the lower locking mold c15 onto the upper hot press mold d1 and the lower hot press mold d2 respectively, and to remove the upper locking mold c1 / lower locking mold c15 from the upper hot press mold d1 / lower hot press mold d2 for maintenance, thereby improving work efficiency and reducing maintenance difficulty.

[0127] To ensure that the locking claw c19 can smoothly enter the locking groove c5, the lower end faces on both sides of the locking claw c19 are inclined surfaces c29. During locking, the locking claw c19 enters the insertion hole c6. When the locking claw c19 rotates relative to the locking groove c5, the inclined surface c29 abuts against the inner end face of the locking block c28, and then the locking claw c19 smoothly rotates into the locking groove c5. If the lower end faces on both sides of the locking claw c19 are right angles, and the engaging surface of the locking claw c19 is not on the same plane as the engaging surface of the locking groove c5 (including the engaging surface of the locking groove c5 being closer to the bottom wall of the insertion hole c6 than the engaging surface of the locking claw c19), the locking claw c19 cannot engage with the locking groove c5.

[0128] The paper bottle mold locking mechanism has the following beneficial effects:

[0129] (1) By setting an upper locking mold c1 with a plurality of first locking mold components c3 on the upper hot pressing mold d1 and a lower locking mold c15 with a plurality of second locking mold components c17 on the lower hot pressing mold d2, one locking end is provided with a locking groove c5 and the other locking end is provided with a locking claw c19, when the upper hot pressing mold d1 and the lower hot pressing mold d2 are closed, by locking the plurality of first locking mold components c3 with the corresponding second locking mold components c17 respectively, the mold closing surfaces of the upper hot pressing mold d1 and the lower hot pressing mold d2 are tightly attached and kept in a closed state, avoiding a large gap between the upper hot pressing mold d1 and the lower hot pressing mold d2. When hot pressing and shaping the paper bottle blank, no obvious mold closing line will appear on the outer side of the paper bottle blank corresponding to the mold closing area of ​​the upper hot pressing mold d1 and the lower hot pressing mold d2, thus improving the aesthetics of the product.

[0130] (2) The existing wet blank hot pressing shaping device does not have a locking mechanism adapted to lock the inner high pressure mold, resulting in poor finished product quality. The present invention can quickly, continuously and repeatedly lock the inner high pressure mold, and after the mold is closed, there is no need to use external force to maintain the mold closing pressure for a long time, thereby improving the yield of finished products while ensuring production efficiency and reducing equipment energy consumption.

[0131] (3) In this invention, after the hot pressing upper mold d1 and hot pressing lower mold d2 are closed, the rotating drive device c8 drives the locking component on the locking mold to rotate so that the locking claw c19 can be inserted into the locking groove c5, thereby realizing the rapid engagement of the hot pressing upper mold d1 and hot pressing lower mold d2 and resisting the tension formed by the internal high pressure. In addition, after the hot pressing is completed, the rotating drive device c8 drives the locking component on the locking mold to rotate again, so that the hot pressing upper mold d1 and hot pressing lower mold d2 can be quickly released.

[0132] (4) The contact surfaces of the locking claw c19 and the locking groove c5 of the present invention can be set as planes, so that the rotation drive device c8 can drive the locking mold component on the locking mold component to rotate in one direction to achieve repeated locking and unlocking, and it is convenient to independently adjust the contact surfaces of the locking claw c19 and the locking groove c5 to obtain a uniform locking surface.

[0133] (5) The first clamping component c3 and the second clamping component c17 are arranged in a symmetrical structure, so that the mold is subjected to uniform force in all parts, which can withstand a large clamping force and make the wall thickness of the product uniform.

[0134] Compared with the prior art, the paper bottle production equipment of the present invention has the following advantages:

[0135] (1) The paper bottle production equipment of the present invention has a paper bottle wet preform forming system, a paper bottle wet preform transfer system, a paper bottle wet preform heating system and a paper bottle shaping and extrusion system, which realizes the automated production of molded bottles using pulp and improves production efficiency;

[0136] (2) The present invention includes a paper bottle wet blank forming device 6 for preparing paper bottle wet blanks, and a paper bottle hot pressing forming device 1 for hot pressing and shaping paper bottle wet blanks into paper bottle products. The forming mold (including upper forming mold, lower forming mold and post forming mold) for preparing paper bottle wet blanks in the paper bottle wet blank forming device 6 and the hot pressing mold (including upper hot pressing mold d1, lower hot pressing mold d2 and post hot pressing mold d3) for hot pressing and shaping paper bottle wet blanks in the paper bottle hot pressing forming device 1 both use three molds to define the outer surface of the paper bottle, thereby achieving seamless one-piece forming of paper bottle products, high forming efficiency, and effectively solving the problem that the inverted part is not easy to open the mold, thereby producing paper bottle products with stable quality.

[0137] (3) The paper bottle hot pressing shaping device 1 combines three molds to shape the paper bottle, heat the paper bottle, and internally extrude the paper bottle, so that the pulp is fully strengthened in the mold, which is beneficial to improving the molding quality and the strength and durability of the bottle.

[0138] Example 2

[0139] Another objective of this invention is to provide a method for forming and shaping wet paper bottle preforms using the paper bottle production equipment described in Embodiment 1.

[0140] Paper bottle wet preform forming methods include:

[0141] The upper forming mold descends below the slurry surface and closes with the lower forming mold. The upper forming mold component and the lower forming mold component apply negative pressure to the paper bottle mold, causing the slurry to be absorbed into the first mold cavity and the second mold cavity.

[0142] After molding, the mold moves towards the second mold cavity, causing the pulp to be absorbed onto the end face of the mold facing the second mold cavity.

[0143] Once the set suction time is reached, the paper bottle mold rises and leaves the slurry surface;

[0144] The upper and lower forming mold components maintain negative pressure on the paper bottle mold, causing the wet paper bottle preform to dehydrate.

[0145] After molding, the mold is blown with air and moves away from the second mold cavity to complete the demolding of the bottom of the wet paper bottle blank;

[0146] The upper mold is blown with air and moved away from the upper mold. The upper mold component maintains negative pressure so that the wet paper bottle preform adheres to the upper mold, completing the demolding of the lower end of the wet paper bottle preform.

[0147] The upper forming mold component is connected to the lower hot pressing mold component. The upper forming mold blows air to separate the upper end of the wet paper bottle blank from the upper forming mold, thus completing the demolding of the upper end of the wet paper bottle blank.

[0148] When the set suction time is reached, the wet paper bottle preform reaches the corresponding thickness.

[0149] The dehydration process of the wet bottle preform needs to be preset with a dehydration time (to ensure that the wet paper bottle preform has a certain amount of moisture for subsequent drying and shaping).

[0150] As the upper forming mold moves away from the upper forming mold, the upper forming mold component applies negative pressure to make the wet paper bottle preform adhere to the upper forming mold.

[0151] When the upper mold of the forming process blows air to separate the upper end of the wet paper bottle blank from the upper mold, the wet paper bottle blank adheres to the lower mold of the hot press.

[0152] The above-mentioned paper bottle wet preform forming method uses a novel paper bottle mold to prepare the paper bottle wet preform, which can realize the one-piece forming of the paper mold wet preform, thereby producing paper mold wet preforms with uniform wall thickness. Furthermore, it uses an upper mold, a lower mold, and a rear mold to close the mold from three directions and use negative pressure to adsorb the slurry to prepare the paper mold wet preform. Additionally, the upper mold, the lower mold, and the rear mold are vacuumed from three directions to achieve preliminary dehydration of the paper mold wet preform. Finally, the upper mold, the lower mold, and the rear mold are relatively far apart to achieve mold opening of the paper mold wet preform, which is highly efficient and fast.

[0153] The process of transferring the wet paper bottle preform into the paper bottle hot pressing and shaping device includes:

[0154] The upper forming mold component moves and aligns with the lower hot pressing mold component. The upper forming mold component releases the negative pressure, and the lower hot pressing mold component applies negative pressure to make the wet paper bottle preform adhere to the lower hot pressing mold.

[0155] Methods for setting wet preforms of paper bottles include:

[0156] The wet paper bottle preform is transferred into the hot press lower mold component of the paper bottle hot press shaping device. The hot press lower mold component applies negative pressure to make the wet paper bottle preform adhere to the hot press lower mold.

[0157] The relative movement of the lower hot-pressing mold component and the upper hot-pressing mold component causes the upper hot-pressing mold and the lower hot-pressing mold to close (the lower hot-pressing mold component moves to align with the upper hot-pressing mold component, and the upper hot-pressing mold descends), and the mold moves towards the second mold cavity after hot pressing;

[0158] The hot-pressing upper mold component and the hot-pressing lower mold component apply negative pressure and heat to the hot-pressing upper mold and the hot-pressing lower mold respectively, so as to dehydrate the wet paper bottle blank;

[0159] The pressure-accumulating elastic bag control mechanism works and enters the interior of the wet paper bottle blank to apply outward pressure to the wet paper bottle blank. The wet paper bottle blank is dehydrated under the squeezing action of the pressure-accumulating elastic bag control mechanism.

[0160] Once the set drying time is reached, the hot-pressed mold is blown with air and moved away from the second mold to complete the demolding of the bottom of the paper bottle product;

[0161] The lower hot press mold is blown with air, while the upper hot press mold maintains negative pressure (the paper molded product is located on the upper hot press mold) and moves away from the lower hot press mold to complete the demolding of the lower end of the paper bottle product. The upper hot press mold component moves the paper bottle product out to the receiving device, and the upper hot press mold is blown with air to complete the demolding of the upper end of the paper bottle product.

[0162] The aforementioned novel paper bottle shaping method involves using a novel paper bottle hot-pressing shaping device to hot-press and shape a wet paper bottle preform. The paper bottle shaping method is accomplished by the coordinated operation of an upper hot-pressing mold, a lower hot-pressing mold, a post-hot-pressing mold, and a pressure-accumulating elastic bag control mechanism within the novel hot-pressing shaping device. During the hot-pressing shaping stage, the inner sides of the upper hot-pressing mold, the lower hot-pressing mold, and the post-hot-pressing mold form a hot-pressing cavity. Then, the pressure-accumulating elastic bag control mechanism applies pressure to the inner side of the wet paper bottle preform placed in the hot-pressing cavity. Applying outward pressure causes the outer side of the wet paper bottle blank to fit tightly against the inner wall of the mold cavity (inside the hot pressing cavity). Under the combined action of the mold and the pressure-accumulating elastic bag control mechanism, the inner and outer walls of the wet paper bottle blank become dense and uniform in thickness. Then, by performing negative pressure drying and heat drying on the wet paper bottle blank, the inner and outer surfaces of the wet paper bottle blank become smooth, resulting in a one-piece molded paper bottle product. This improves the quality and aesthetics of the paper bottle product, eliminates the trouble of gluing two halves of the bottle, and increases the production speed of the paper bottle product.

[0163] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A paper bottle production apparatus characterized by comprising: include: The forming station is equipped with a paper bottle wet preform forming device, which includes a forming frame, a slurry tank, an upper forming mold component, a lower forming mold component, and a forming air source pump. The slurry tank is located at the lower part of the forming frame. The lower forming mold component is equipped with a lower forming die, which is vertically movable within the slurry tank. The upper forming mold component is vertically and horizontally movable above the slurry tank and is equipped with an upper forming die. A rear forming die is slidably located behind the upper forming die or the rear forming die, and the rear forming die is driven by a rear forming drive device. The forming air source pump connects the upper forming mold component and the lower forming die component. The hot pressing station is equipped with a paper bottle hot pressing and shaping device, which includes a hot press frame, a hot press upper mold component, a hot press lower mold component, a pressure-accumulating elastic bag control mechanism, and a hot press air source pump. The hot press upper mold component is vertically movable on the upper part of the hot press frame. The hot press lower mold component moves horizontally between the paper bottle wet preform forming device and the hot press upper mold component. The hot press upper mold component is equipped with a hot press upper die and an upper heating element, and the hot press lower mold component is equipped with a hot press lower die and a lower heating element. A hot press rear die is slidably located behind the hot press upper die or the hot press lower die. The hot press rear die is driven by a hot press rear drive device. The pressure-accumulating elastic bag control mechanism is used to extend into the hot press cavity to apply outward pressure to the paper bottle wet preform when the hot press upper die, hot press lower die, and hot press rear die are closed to form the hot press cavity. The hot press air source pump is connected to the hot press upper mold component and the hot press lower mold component. The transfer station is located between the forming station and the hot pressing station, where the upper forming mold component and the lower hot pressing mold component are moved to the transfer station. The upper and lower forming mold components are used to prepare a paper bottle preform by closing the mold in the slurry tank. The upper and lower forming mold components leave the slurry tank and separate. The upper forming mold component transfers the paper bottle preform adsorbed on it to the hot pressing lower mold component. The hot pressing upper and lower mold components close the mold, and the pressure-accumulating elastic bag control mechanism works and enters the interior of the paper bottle preform to apply outward pressure to the paper bottle preform, and the paper bottle preform is hot-pressed and shaped to form a paper bottle product. The pressure-accumulating elastic bag control mechanism includes a support, a tubular component, an elastic bag, a displacement driving device, and a pump. The tubular component is slidably arranged horizontally or inclined upward relative to the support. The tubular component has a hollow tube with several through holes at its end. The elastic bag is fitted over the outside of the tube and covers the through holes. The open end of the elastic bag is sealed and fixed relative to the tube. The displacement driving device is used to drive the tubular component to move towards the outer end of the support, so that the end of the tube with the through holes is located outside the edge of the support end. The pump is used to input fluid into the tube or extract fluid from the tube.

2. The paper bottle production apparatus according to claim 1, characterized by The upper forming mold has the same structure as the upper hot pressing mold, the lower forming mold has the same structure as the lower hot pressing mold, the post forming mold has the same structure as the post hot pressing mold, and the post forming drive device has the same structure as the post hot pressing drive device. The upper molding mold has an upper bottle cavity, an upper bottle mouth that connects to the upper bottle cavity, and an upper rear side channel that connects to the upper bottle cavity at one end facing the lower molding mold; the lower molding mold has a lower bottle cavity, a lower bottle mouth that connects to the lower bottle cavity, and a lower rear side channel that connects to the lower bottle cavity at one end facing the upper molding mold. After molding, the mold is slidably set on the lower rear channel; when the upper molding mold and the lower molding mold are closed, the upper bottle mouth and the lower bottle mouth surround to form the first mold cavity, the upper bottle body cavity and the lower bottle body cavity surround to form the second mold cavity, and the upper rear channel and the lower rear channel surround to form the discharge cavity. After molding, the mold is set to fit the port of the discharge cavity facing the second mold cavity, and the mold is driven by the rear drive device to move to the port of the discharge cavity facing the second mold cavity to fit the clearance. The upper hot press mold facing the lower hot press mold has an upper bottle cavity, an upper bottle mouth communicating with the upper bottle cavity, and an upper rear side channel communicating with the upper bottle cavity; The lower mold of the hot press has a lower bottle cavity, a lower bottle mouth that communicates with the lower bottle cavity, and a lower rear side channel that communicates with the lower bottle cavity at one end facing the upper mold of the hot press. After hot pressing, the mold is slidably set on the lower rear channel; when the upper hot pressing mold and the lower hot pressing mold are closed, the upper bottle cavity and the lower bottle cavity are enclosed to form the first mold cavity, the upper bottle body cavity and the lower bottle body cavity are enclosed to form the second mold cavity, and the upper rear channel and the lower rear channel are enclosed to form the discharge cavity. After hot pressing, the mold is configured to fit the port of the discharge cavity facing the second mold cavity, and the mold is driven by the rear drive device to move to the port of the discharge cavity facing the second mold cavity to fit with it.

3. The paper bottle production apparatus according to claim 2, characterized by The lower bottle body cavity, lower bottle mouth cavity, and upper rear channel are horizontally arranged; the upper bottle body cavity, upper bottle mouth cavity, and upper rear channel are respectively arranged corresponding to the lower bottle body cavity, lower bottle mouth cavity, and upper rear channel. Alternatively, the upper rear channel is set horizontally, and the lower bottle body cavity and lower bottle mouth cavity are inclined upward towards the upper rear channel; The upper bottle body cavity, the upper bottle mouth cavity, and the upper rear side channel are respectively provided to correspond to the lower bottle body cavity, the lower bottle mouth cavity, and the upper rear side channel.

4. The paper bottle production apparatus according to claim 2, characterized by The molded part is provided with a protrusion on the top; the upper rear channel is provided with a groove that adapts to the protrusion when the molded part moves to the port of the discharge cavity facing the second mold cavity. The hot-pressed mold has a protrusion on top; the upper rear channel has a groove that adapts to the protrusion at the position where the hot-pressed mold moves to the port of the discharge cavity facing the second mold cavity.

5. The paper bottle production apparatus according to claim 2, characterized by The upper bottle cavity and the upper bottle mouth have outwardly protruding first wedge-shaped protrusions at their edges, and the lower bottle cavity and the lower bottle mouth have outwardly protruding second wedge-shaped protrusions at their edges.

6. The paper bottle production apparatus according to claim 1, characterized by The paper bottle hot pressing and shaping device also includes a paper bottle mold locking mechanism, which includes an upper locking mold, a lower locking mold, and a rotary drive device. The upper locking mold is disposed on the upper hot pressing mold and includes a plurality of first locking components, each having a first locking end located on the side of the upper hot pressing mold. The lower locking mold is disposed on the lower hot pressing mold and includes a plurality of second locking components, each having a second locking end located on the side of the lower hot pressing mold and aligned with the first locking end. One locking end is provided with a locking groove, and the other locking end is provided with a locking claw. The rotary drive device is located on the upper or lower locking mold and is used to drive the locking components on the locking mold to rotate. After the upper and lower hot-press molds are closed, the rotary drive device drives the corresponding locking component to rotate so that the locking claws are engaged in the locking groove.

7. The paper bottle production apparatus according to claim 6, characterized by The second locking member has the locking claw on its upper part; The lower part of the first locking end is provided with a socket, and the inner sidewall of the socket is provided with the locking groove; The socket is adapted to the second locking end.

8. The paper bottle production apparatus according to claim 6, characterized by The rotary drive device is located on the upper locking mold, and the upper part of the first locking mold component is provided with a driven gear component; The rotary drive device includes a motor, a mounting frame, a transmission gear component, a strip-shaped transmission component, and several tensioning components. The motor is fixedly mounted relative to the upper part of the first mold-locking component via the mounting frame. The transmission gear component is connected to the output end of the motor. The transmission gear component is connected to the driven gear components of several first mold-locking components via the strip-shaped transmission component. The bar-shaped transmission components are respectively connected to the outer or inner end faces of several driven gear components; The tensioning member is located between two adjacent first mold-locking members and is used to press against the strip-shaped transmission member so that the portion of the strip-shaped transmission member located between the two first mold-locking members forms an included angle.

9. The paper bottle production apparatus according to claim 1, characterized by The upper forming mold component includes a upper forming mold moving mechanism, a first forming horizontal driving device, and a first forming vertical driving device. The upper forming mold moving mechanism is horizontally arranged relative to the forming frame and extends from the forming station to the transfer station. The upper forming mold is mounted on the upper forming mold moving mechanism via the first forming vertical driving device. The first forming horizontal driving device drives the upper forming mold to reciprocate along the setting direction of the upper forming mold moving mechanism, and the first forming vertical driving device drives the upper forming mold to reciprocate in the vertical direction. The lower forming mold component includes a second forming vertical driving device. The lower forming mold is mounted on the forming frame via the second forming vertical driving device, and the second forming vertical driving device drives the lower forming mold to reciprocate in the vertical direction. The hot-pressing upper mold component includes a first hot-pressing vertical driving device, which is mounted on the hot-pressing frame. The first hot-pressing vertical driving device is used to drive the hot-pressing upper mold to reciprocate in the vertical direction. The hot-pressing lower mold component includes a hot-pressing lower mold moving mechanism and a first hot-pressing horizontal driving device. The hot-pressing lower mold moving mechanism is horizontally arranged relative to the hot-pressing frame and extends from the hot-pressing station to the transfer station. The first hot-pressing horizontal driving device is used to drive the hot-pressing upper mold to reciprocate along the setting direction of the hot-pressing lower mold moving mechanism. The upper forming mold and the lower hot pressing mold are moved to the transfer station respectively. The upper forming mold descends and closes with the lower hot pressing mold to transfer the wet paper bottle preform.

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