Barrel body forming mechanism

Abstract

A supporting curved surface is arranged on the outer side of a side mold of a mold body of the barrel forming mechanism, and a supporting plane of a center mold is connected and matched with the supporting curved surface to define a barrel supporting surface; the surface of the supporting curved surface is further provided with an air outlet connected with the air channel and the air inlet. The central mold is provided with a longitudinal hole channel and is connected with a water receiving seat, the water receiving seat is provided with a first water receiving opening, a second water receiving opening, a water passing channel and a longitudinal water passing pipe, the first water receiving opening is communicated with the rear end of the longitudinal water passing pipe, the front end of the longitudinal water passing pipe penetrates through the water passing channel and extends into the longitudinal hole channel, and the second water receiving opening is communicated with the water passing channel; the supporting curved surface comprises an arc surface, a supporting curved surface and a supporting plane. The whole mold body is in a flat shape, and paper sheets can be well supported, so that an inclined landing edge or a straight landing edge with a large width can be smoothly enclosed and lapped; the barrel body enclosed on the flat mold body can be blown to be loose so as to facilitate demolding, and the problem that the paper barrel is adhered to the mold body and is not easy to demold can be solved after a cooling function is achieved.

Description

Technical Field

[0002] The invention relates to a tube body forming device for paper containers such as paper cups or paper bowls. Background Art

[0003] The body of a paper container such as a paper cup or paper bowl (collectively referred to as a paper cup for ease of presentation) is enclosed on a forming mold by a cup clamp device (such as a left clamp, a right clamp, a top block, etc.), and the left and right sides of the paper sheet (usually a fan-shaped paper sheet) are overlapped to form an overlap, which is then heated and welded by an ultrasonic device.

[0004] Among them, the ultrasonic device frequently presses on the forming mold during operation, and the forming mold is heated and easily adhered to the cylinder body, affecting the demoulding of the cylinder body and even causing damage to the cylinder body. Moreover, for some paper (i.e. paper sheets) materials, the power of the ultrasonic device needs to be increased to ensure that the overlapping edges are heated and bonded to form the cylinder body, but this will make the forming mold heat up more seriously, causing the paper tube made of PLA paper, double-coated paper, coated paper, etc. to stick to the forming mold more seriously. During long-term operation or medium or high-speed operation, the forming mold is frequently pressed by the ultrasonic device, and the thickness of the forming mold affects its life.

[0005] Among them, the demoulding device after the barrel body is formed acts on the position of the barrel body corresponding to the cup mouth. For example, a demoulding component such as a hook is used to act on the position corresponding to the cup mouth, and the barrel body is hooked, pulled or pushed forward from the molding mold to be demoulded. The demoulding is unstable when the barrel body and the molding mold are tightly embraced, which can easily damage the cup mouth and affect the curling, and can also easily cause the inner wall of the barrel body to be damaged by friction with the molding mold; especially the bent part of the barrel body is more difficult to separate and demould from the molding mold.

[0006] Among them, the left and right sides of the paper sheet (usually a fan-shaped paper sheet) overlap to form an overlap, which is usually divided into a straight overlap or an oblique overlap. For example, when the left and right sides of the paper sheet (fan-shaped paper sheet) are symmetrical, a straight overlap is formed. Another example is when one side of the paper sheet is a straight edge and the other side is an oblique edge. When overlapping the straight overlap, in order to make the connection more secure, the overlap area can be increased, and the overlap width becomes larger (wider) - that is, a wide overlap; and when overlapping the oblique overlap, the oblique overlap itself is set obliquely, and the (circumferential) span between the two ends of the oblique overlap (the two ends of the oblique overlap located above and below the barrel) is also relatively large. It is crucial to ensure the smooth overlap of these wide overlaps and oblique overlaps.

[0007] In addition, the top block of the cup clamp structure will push the paper sheet upward to the lower side of the molding mold from the bottom of the molding mold; the die head presses down on the upper side of the molding mold; during long-term, medium-speed or high-speed operation, the molding mold is frequently subjected to the force of the top block and / or the die head from top to bottom, and the tolerance strength (rigidity) of the molding mold is also crucial, affecting the service life of the molding mold. Summary of the invention

[0008] In view of the technical problems existing in the background technology, the technical problem solved by the present invention is to provide a barrel forming mechanism with cooling function and convenient demoulding and overlapping.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions: a barrel forming mechanism, including a barrel forming mold, a cup clamp device and an ultrasonic welding device, the barrel forming mold includes a mold body, the cup clamp device includes a left flip clamp, a right flip clamp and a lifting top block, the ultrasonic welding device includes a lifting welding head, the left flip clamp and the right flip clamp are respectively arranged on the left and right sides of the mold body, the lifting top block is arranged below the mold body, and the lifting welding head is arranged above the mold body, characterized in that: the mold body includes a center mold and side molds connected to the left and right sides of the center mold, the upper and lower sides of the center mold are respectively provided with support planes, the inner side of the side mold is connected to the center mold, the outer side of the side mold has a support curved surface, the support plane and the support curved surface are connected and matched to form a barrel support surface; The surface of the curved surface is also provided with an air outlet, and an air duct is provided in the mold body, which is connected to the air outlet. The mold body is also provided with an air inlet, which is connected to the air duct; the rear side of the central mold is connected to a water receiving seat, and the central mold is provided with a longitudinal channel; the water receiving seat is provided with a first water receiving port, a second water receiving port, a water flow channel and a longitudinal water flow pipe, the water flow channel is connected to the longitudinal channel, a baffle is provided between the first water receiving port and the water flow channel, the longitudinal water flow pipe is connected to the baffle, the first water receiving port is connected to the rear end of the longitudinal water flow pipe, the front end of the longitudinal water flow pipe passes through the water flow channel and extends into the longitudinal channel, and the second water receiving port is connected to the water flow channel; the supporting curved surface includes an arc surface, the upper end of the supporting curved surface is connected to the upper supporting plane, and the lower end of the supporting curved surface is connected to the lower supporting plane.

[0010] The following various optimizations or supplementary explanations can be made on the above technical solutions respectively.

[0011] For example, the first water inlet is longitudinally arranged, the water passage is longitudinally arranged, the first water inlet, the longitudinal water passage and the longitudinal channel are coaxially arranged, and the second water inlet is radially arranged.

[0012] For example, the longitudinal water pipe extends into the end of the longitudinal channel; the front end of the longitudinal water pipe cooperates with the end of the longitudinal channel to form a water return gap; water gaps are left between the longitudinal water pipe and the longitudinal channel, and between the longitudinal water pipe and the water passage; the first water inlet, the longitudinal water pipe, the longitudinal channel, the water passage and the second water inlet are connected in sequence to form a water channel; the longitudinal channel and the water receiving seat are screwed or tightly connected by threaded fastening.

[0013] Further optimization, the longitudinal channel is arranged centrally relative to the mold body; the mold body also includes a positioning block for matching the positioning hole of the support plate connected to the frame, and the positioning block is located on the rear side of the mold body; the mold body also has a mounting seat, which is connected to the support plate; the positioning block is arranged centrally relative to the mold body, and the water receiving seat is installed and connected to the positioning block and connected to the longitudinal channel; the first water receiving port is located at the rear side of the water receiving seat, and the water flow channel is located at the front of the water receiving seat; the longitudinal channel is located at the rear of the mold body, and the port of the longitudinal channel is arranged backward; the water receiving seat is connected to the rear side of the mold body.

[0014] For another example, the air passage includes an air groove, the air groove is arranged on the inner side of the side mold, the air inlet is arranged on the side mold, and the air inlet and the air outlet are respectively connected to the air groove.

[0015] Further optimization, the air outlet is arranged on the supporting curved surface and tilted forward and outward; a demolding groove is also provided on the supporting curved surface; the demolding groove is arranged from back to front, and the rear end of the side mold has a demolding component with a demolding groove moved forward; the side mold is connected to the center mold by fasteners; a first connecting hole is provided on the side mold, and a second connecting hole is provided on the center mold, the first connecting hole is arranged in the demolding groove, and the center mold is respectively provided with a second connecting hole, and the first connecting hole and the second connecting hole are connected by fasteners.

[0016] For example, the supporting curved surface is smoothly connected with the supporting plane; the arc surface adopts a semi-circular arc surface, and the arc surface is tangent to the supporting plane. Or, the supporting curved surface is smoothly connected with the supporting plane, and the arc surface adopts a minor arc surface; for example, the supporting curved surface also includes a transition connection curved surface, and the upper and lower ends of the minor arc surface are smoothly connected with the supporting plane by the transition connection curved surface, wherein the two ends of the transition connection curved surface are tangent to the arc transition surface and the supporting plane respectively; for example, the transition connection curved surface adopts an inward arc transition surface.

[0017] In addition, the supporting plane is set as a horizontal plane, and the supporting plane is relatively symmetrical up and down; the left and right sides of the center mold are symmetrical to each other; the left and right sides of the supporting plane are isosceles, and the left and right sides of the supporting plane are an isosceles triangle support area or an isosceles trapezoidal support area; the inner side of the side mold and the left and right sides of the center mold are respectively set as planes.

[0018] The beneficial effects of the present invention are as follows: the supporting planes on the upper and lower sides of the mold body make the mold body flat as a whole, which can better support the paper piece, facilitate the overlapping connection of the oblique overlap or the straight overlap with a larger width, and ensure that the die head descends and presses on the mold body to cooperate with the overlap at the enclosed part of the cylinder body, so that the oblique overlap or the straight overlap with a larger width can be smoothly enclosed and overlapped; the left and right supporting curved surfaces of the mold body can better cooperate to support the paper piece to be embraced, and it is not easy to produce obvious edges, folds and scratches on the cylinder body. In addition, the structure of the mold body has an air path structure, which can loosen the cylinder body enclosed on the flat mold body for demoulding, and even air cool the mold body to reduce the temperature of the mold body, avoiding the problem that the flat mold body is not easy to demould. In addition, the mold body has a water cooling structure, and the structure is relatively simple and only needs to be provided with a longitudinal channel. After having a cooling function, it can reduce the problem that the paper tube is not easy to demould by adhering to the mold body, and can also make the oblique overlap or the straight overlap with a larger width on the center mold of the mold body bonded and fixed faster when cold. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following describes the relevant details and working principles of the implementation mode and embodiments of the present invention in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0021] Figure 2 for Figure 1 A schematic diagram of the structure in which one side mold is in a separated state.

[0022] Figure 3 for Figure 1 Schematic diagram of the structure from another angle.

[0023] Figure 4 for Figure 3 Top view.

[0024] Figure 5 for Figure 4 Sectional view of AA.

[0025] Figure 6 It is a schematic diagram of the inner structure of the side mold in an embodiment of the present invention.

[0026] Figure 7 It is a schematic diagram of the structure of the mold body equipped with a left flip clamp in an embodiment of the present invention.

[0027] In the figure: 1. Mold body; 10. Longitudinal channel; 11. Positioning block; 12. Mounting seat; 13. Center mold; 14. Side mold; 15. Airway; 100, barrel support surface; 131. Support plane; 132. Second connecting hole; 133. Left and right side surfaces; 141, supporting curved surface; 142, air outlet; 143, air inlet; 144, air groove; 145, inner side; 146, demoulding groove; 147, first connecting hole; 148, inlet; 1411, arc surface; 1412, inward arc transition surface; 1413, transition connection curved surface; 2. Water receiving seat; 20. Longitudinal water pipe; 21. First water receiving port; 22. Second water receiving port; 23. Water passing channel; 24. Baffle; 3. Flip the clip to the left. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the implementation mode of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0029] Referring to the accompanying drawings, the barrel forming mechanism in the example of the present embodiment is an important mechanism of the forming equipment of paper cups, paper bowls, etc., which includes a barrel forming mold, a cup clamping device and an ultrasonic welding device. The barrel forming mold includes a mold body 1, and the cup clamping device (not shown in the figure) includes a left flip clamp 3, a right flip clamp and a lifting top block. The ultrasonic welding device (not shown in the figure) includes a lifting welding head. The left flip clamp 3 and the right flip clamp are respectively arranged on the left and right sides of the mold body 1, the lifting top block is arranged below the mold body 1, and the lifting welding head is arranged above the mold body 1. It is a mature technology and will not be described in detail.

[0030] In the present invention, the mold body 1 includes a center mold 13 and a side mold 14, and the side mold 14 is connected and installed on the left and right sides 133 of the center mold 13, that is, the center mold 13 is sandwiched by the left and right side molds 14. The mold body 1 includes a split combined connection structure of the center mold 13 and the side molds 14 on both sides. The center mold 13 and the side molds 14 can be made of the same material or different materials. For example, the side mold 14 can be made of a material that is easier to dissipate heat (such as aluminum), especially when the outer side of the side mold 14 is a curved side, the side mold 14 is not easy to adhere to the cylinder body at the bending part after heat dissipation (compared with the high temperature bending part, the cylinder body is not easy to be separated and demolded and is easy to damage the cylinder body after adhesion), which can make the cylinder body more smoothly demolded, and the center mold 13 can be made of a material with higher strength (which can better bear the pressure to support the top block in the cup clamp device, the mold of the ultrasonic device, etc.), and even only the specifications of the side mold 14 need to be changed to meet the needs of changes in the specifications of the cylinder body. The upper and lower sides of the center mold 13 are respectively provided with support planes 131, the inner side 145 of the side mold 14 is connected to the center mold 13, and the outer side of the side mold 14 is provided with a support curved surface 141. The support plane 131 and the support curved surface 141 are connected and matched to form a cylinder body support surface 100. The cylinder body support surface 100 is used to support the overlap of the paper sheet when it is enclosed by the cup clamp device and welded by the ultrasonic welding device. When used for forming paper cups, paper bowls, or outer sleeves (such as cup sleeves, etc.), the paper sheet will rely on the cylinder body support surface 100 of the mold body 1 to enclose and form the cylinder body; in addition, the surface of the support curved surface 141 is also provided with an air outlet 142, wherein the mold body 1 is provided with an air channel 15, and the air is The air duct 15 is connected with the air outlet 142, and the mold body 1 is also provided with an air inlet 143, which is connected with the air duct 15. External gas can be input into the cylinder body forming mold for easy demoulding from the air inlet 143, and then blown out from the air outlet 142 after passing through the air duct 15. The combined structure (i.e., the air path structure) can loosen the cylinder body enclosed on the cylinder body support surface 100, especially when the outer side of the side mold 14 is a curved side, so that the cylinder body can be demoulded more smoothly; even cold air can be blown for air cooling, and the problem of paper tube sticking to the mold body 1 and being difficult to demould can be reduced by lowering the temperature of the mold body 1, especially the temperature of the side mold 14.

[0031] The center mold 13 and the side molds 14 are connected to form the mold body 1, that is, the mold body 1 is a split combined connection structure, which is convenient for material selection and adapting to changes in cylinder body specifications. More importantly, its structure has an air path structure, which can loosen the cylinder body enclosed on the cylinder body support surface 100 for easy demoulding, and can even be air-cooled to reduce the temperature of the mold body 1, especially the temperature of the side molds 14, and can also reduce the problem of paper tubes sticking to the mold body 1 and being difficult to demould.

[0032] The rear side of the center mold 13 is connected to a water receiving seat 2, and a longitudinal channel 10 is provided on the center mold 13. The water receiving seat 2 is provided with a first water receiving port 21, a second water receiving port 22, a water passage 23 and a longitudinal water passage pipe 20, the water passage 23 is connected to the longitudinal channel 10, a baffle 24 is provided between the first water receiving port 21 and the water passage 23, the baffle 24 can separate the first water receiving port 21 from the water passage 23, the longitudinal water passage pipe 20 is connected to the baffle 24, and a through hole can be provided on the baffle 24 for the longitudinal water passage pipe 20 to cooperate and assemble, wherein the first water receiving port 21 is connected to the rear end of the longitudinal water passage pipe 20, the front end of the longitudinal water passage pipe 20 passes through the water passage 23 and extends into the longitudinal channel 10, and the second water receiving port 22 is connected to the water passage 23.

[0033] The first water inlet 21, the longitudinal water pipe 20, the longitudinal channel 10, the water channel 23 and the second water inlet 22 form a water path for the coolant to flow in sequence (either in forward sequence or reverse sequence) so as to cooperate with the cooling of the mold body 1 and make it have a better cooling function. The structure of the mold body 1 is relatively simple and only requires the longitudinal channel 10 (single-hole structure) to cooperate. The processing is relatively simpler and the risk of water leakage is reduced. Moreover, only one connection position is required between the water receiving seat 2 and the mold body 1, which further reduces the risk of water leakage. With the cooling function, the problem of paper tube sticking to the mold body 1 can be reduced, and the problem of the temperature of the molding mold constantly rising can be avoided, and the demoulding of the paper tube will be smoother; with the cooling function, the overlapped edges of the paper tube can be bonded and shaped faster to meet the high-speed production requirements; during assembly, it is only necessary to connect the prepared water receiving seat 2 to the mold body 1 accordingly.

[0034] The supporting curved surface 141 includes an arc surface 1411 . The upper end of the supporting curved surface 141 is connected to the upper supporting plane 131 , and the lower end of the supporting curved surface 141 is connected to the lower supporting plane 131 .

[0035] In the present invention, the support planes 131 on the upper and lower sides of the mold body 1 (its center mold 13 part) make the mold body 1 flat as a whole, which can better support the paper piece, facilitate the overlapping connection of the oblique overlap or the straight overlap with a larger width, and ensure that the die head is pressed on the mold body 1 to match the overlap at the enclosed part of the cylinder body, so that the oblique overlap or the straight overlap with a larger width can be smoothly enclosed and overlapped; the left and right support curved surfaces 141 of the mold body 1 (its side mold 14 part) can better cooperate to support the paper piece to be embraced, and it is not easy to produce obvious edges, folds and scratches on the cylinder body. In addition, the structure of the mold body 1 has an air path structure, which can loosen the cylinder body enclosed on the flat mold body 1 for easy demoulding, and even air-cooling to reduce the temperature of the mold body 1, avoiding the problem that the flat mold body 1 is not easy to demould. Moreover, the mold body 1 has a water channel cooling structure, and the structure is relatively simple and only requires the longitudinal channel 10 (single-hole structure) to cooperate. With the cooling function, the problem of the paper tube sticking to the mold body 1 and being difficult to demold can be reduced, and the oblique edges or wider straight edges on the center mold 13 of the mold body 1 can be bonded and shaped faster when cooled.

[0036] The following optimization or further explanation may be performed based on the above embodiments.

[0037] For example, the first water inlet 21 is arranged longitudinally (longitudinal direction is the front-to-back axis direction, the same below), the water passage 23 is arranged longitudinally, the first water inlet 21, the longitudinal water passage pipe 20 and the longitudinal channel 10 are arranged coaxially, and the second water inlet 22 is arranged radially. The structure is relatively compact and convenient for axial front-to-back insertion during assembly. The first water inlet 21 and the second water inlet 22 are generally arranged for external waterway joints.

[0038] The longitudinal water pipe 20 extends to the end of the longitudinal channel 10. The relative position of the extension can be adjusted by the length of the longitudinal water pipe 20 or the depth of the longitudinal channel 10, so that the longitudinal water pipe 20 (front end) can be extended into the longitudinal channel 10 as much as possible for more adequate cooling; in addition, the front end of the longitudinal water pipe 20 cooperates with the end of the longitudinal channel 10 to form a water return gap to ensure water circulation and adequate cooling, such as ensuring that the coolant forms a flow path through the longitudinal water pipe 20, the water return gap, and the longitudinal channel 10 in sequence.

[0039] There are water gaps between the longitudinal water pipe 20 and the longitudinal hole 10 and between the longitudinal water pipe 20 and the water passage 23, and the size of the water gap can be set by the size of the caliber. The longitudinal hole 10 and the water passage 23 are respectively surrounded by the periphery of the longitudinal water passage 23.

[0040] The first water inlet 21, the longitudinal water pipe 20, the longitudinal channel 10, the water passage 23 and the second water inlet 22 are sequentially connected to form a water channel for the coolant to flow, and the flow direction can be forward or reverse. For example, the coolant is connected from the first water inlet 21, passes through the water channel, and is connected from the second water inlet 22, and the flow effect is better, which is conducive to cooling. Of course, it can also flow in the reverse direction.

[0041] In addition, the longitudinal channel 10 is screwed or tightly connected to the water receiving seat 2 by threaded fastening. For example, in the figure, the threaded fastening and screwing are relatively convenient for assembly and disassembly. The port of the longitudinal channel 10 is provided with an internal thread, and the water receiving seat 2 is provided with an external thread, which is screwed in the internal thread. The outer ring of the water receiving seat 2 can also be provided as a wrench fitting part. The longitudinal channel 10 is centrally arranged relative to the mold body 1, and the cooling effect is relatively balanced. The first water inlet 21 is located at the rear side of the water receiving seat 2, the water passage 23 is located at the front of the water receiving seat 2, and the longitudinal channel 10 is located at the rear of the mold body 1. The port of the longitudinal channel 10 is arranged backward, which is not only convenient for connection, but also frees up the front side of the mold body 1 for other structures to connect.

[0042] In addition, the mold body 1 also includes a positioning block 11, which is located at the rear side of the mold body 1. The support plate (not shown) on the frame of the equipment has a positioning hole, and the positioning block 11 can be matched and connected in the positioning hole. The positioning block 11 can be a square block or a square block with chamfers, which is convenient for the rapid installation and setting of the mold body 1; the mold body 1 also has a mounting seat 12, which is connected to the support plate and can be connected with fasteners to facilitate the replacement of specifications or maintenance. The positioning block 11 is set in the center relative to the mold body 1, and the water receiving seat 2 is installed and connected to the positioning block 11 and connected to the longitudinal channel 10, and the structure is relatively more compact.

[0043] For another example, the air channel 15 includes an air groove 144, which is arranged on the inner side 145 of the side mold 14 (i.e., the side facing the middle center mold 13). It is relatively convenient to process the air groove 144 on the inner side 145 of the side mold 14. After the processing is completed, the side mold 14 and the center mold 13 are assembled. The left and right side surfaces 133 of the center mold 13 are respectively abutted against the inner sides 145 of their respective side molds 14, and the enclosed air groove 144 can cooperate to form the air channel 15; wherein, the air inlet 143 is arranged on the side mold 14, and the air path structure can be completely arranged on the side mold 14. The structure of the center mold 13 does not need to set up other structures due to the air path structure, and the center mold 13 is relatively simpler; the air inlet 143 and the air outlet 142 are respectively connected to the air groove 144, and in the structure, the air inlet 143 and the air outlet 142 can be set on the outside of the side mold 14 (that is, the side away from the middle center mold 13), and the air inlet 143 and the air outlet 142 can be connected to the air groove 144 on the inner side 145 of the side mold 14 by drilling (for example, drilling holes on the outside to align with the air groove 144 on the inner side 145), which is relatively convenient for processing and manufacturing. The air outlet 142 is located within the range of the supporting curved surface 141; the air inlet 143 can be set at the rear of the supporting curved surface 141 of the side mold 14, and the air inlet 143 avoids occupying the support range and affecting the forward movement of the barrel body to demould. In addition, the air outlet 142 is arranged on the supporting curved surface 141 and tilted forward outward. The air output from the air outlet 142 can not only loosen the barrel body enclosed on the barrel body supporting surface 100 to separate the barrel body from the mold body 1, but also blow the barrel body forward to assist the barrel body to move in the demolding direction, making demolding easier and achieving a better demolding effect.

[0044] In addition, a demoulding groove 146 is also provided on the supporting curved surface 141. The demoulding groove 146 can be used for the demoulding component to contact the opening of the barrel body and the demoulding groove 146 can avoid the demoulding component from moving forward to move the barrel body forward from the mold body 1 to demould. Generally, the demoulding groove 146 is arranged from the back to the front and is in a relatively central position up and down. Among them, the rear end of the side mold 14 has a demoulding component forward movement entrance 148 of the demoulding groove 146, so that the demoulding component can smoothly move forward into the demoulding groove 146 of the side mold 14 to cooperate in demoulding the barrel body.

[0045] For another example, the side mold 14 is connected to the center mold 13 by fasteners (such as screws, etc.). For example, the side mold 14 is provided with a first connection hole 147, and the center mold 13 is provided with a second connection hole 132. The first connection hole 147 is set in the demoulding groove 146, and the center mold 13 is respectively provided with the second connection hole 132. The first connection hole 147 and the second connection hole 132 are connected by fasteners. The structure is relatively compact, and the demoulding groove 146 has a dual function, which can be used for the fastener and the first connection hole 147 to cooperate with the installation to avoid the position, and can also avoid the operation of the demoulding component. The volume of the mold body 1 is relatively small, and the connection is relatively stable, which is not easy to affect the barrel support surface 100.

[0046] For another example, the support curved surface 141 and the support plane 131 are smoothly connected (such as tangentially connected), and the connection between the support curved surface 141 and the support plane 131 can be polished smooth to make the transition soft, so that when the paper piece is enclosed on the mold body 1 (its barrel support surface 100) to form the barrel, it is not easy to have marks and scratches at the connection, and it is not easy to produce indentations on the paper piece. Among them, the side mold 14 and the center mold 13 adopt a split assembly structure, for example, the side mold 14 is installed and connected to the left and right side surfaces 133 of the center mold 13, and can be installed and connected by fasteners and other means.

[0047] The supporting curved surface 141 may adopt the following embodiments: In the first embodiment, the arc surface 1411 adopts a semi-circular arc surface 1411, and the arc surface 1411 is tangent to the supporting plane 131. The arc surface 1411 of the supporting curved surface 141 directly adopts a semi-circular arc surface 1411 and is tangent to the supporting plane 131 to achieve a smooth connection, and the side mold 14 is relatively easy to process.

[0048] In the second embodiment, the arc surface 1411 adopts an inferior arc surface, and the supporting curved surface 141 also includes a transition connecting curved surface 1413, and the upper and lower ends of the inferior arc surface are respectively smoothly connected with the supporting plane 131 by the transition connecting curved surface 1413; that is, the supporting curved surface 141 of the side mold 14 includes a central inferior arc surface and transition connecting curved surfaces 1413 at its upper and lower ends, and the inferior arc surface is smoothly connected with the supporting plane 131 by the transition connecting curved surface 1413; in this structure, when the tube body is made of paper sheets of the same specification, compared with the first embodiment (the supporting curved surface of the side mold 14 For example, the supporting curved surface 141 directly adopts a semi-circular curved surface 1411), the thickness (upper and lower dimensions) of the center mold 13 in the second embodiment can be relatively large, and while satisfying the sufficient (or even equal) left and right widths of the supporting plane 131, it can match paper pieces of the same specifications. The idea involved in the second embodiment is that the supporting curved surfaces 141 of the two side molds 14 adopt inferior curved surfaces and are connected by transition connecting curved surfaces 1413, which can make the thickness of the center mold 13 relatively thicker, and the entire enclosed circumference remains unchanged, which is suitable for making the tube body of paper pieces of the same specifications. In the structure of the second embodiment, the thickness of the center mold 13 becomes larger, and compared with the thin center mold 13, it is also suitable for making the tube body of the same specification (circumference) of paper sheets. The center mold 13 with a larger thickness has relatively strong strength for support, and can better withstand the impact of the cup clamp device, ultrasonic device, etc., meet the requirements of fast, frequent and pressure-bearing, so as to smoothly enclose and overlap, and have a longer service life. Moreover, after the thickness is larger, it is convenient to set water channel cooling in the center mold 13 and it is not easy to affect its own strength. While meeting the requirements that the center mold 13 has sufficient thickness to ensure its strength and pressure-bearing, it can also make its supporting plane 131 have sufficient width to meet the requirements of smooth enclosure and overlap of the oblique overlap or the straight overlap with a larger width, and can take into account the thickness and width of the center mold 13. For example, the transition surface 1413 adopts an inward-retracted arc transition surface 1412 (i.e., an arc surface with a radius smaller than that of the inferior arc surface). The arc surface processing is relatively mature and stable, ensuring that the molding molds processed and manufactured in the same batch are consistent. The upper and lower ends of the inferior arc surface are respectively connected to the supporting plane 131 through the inward-retracted arc transition surface 1412; the two ends of the inward-retracted arc transition surface 1412 are respectively tangent to the inferior arc surface and the supporting plane 131.

[0049] In addition, the support plane 131 is set as a horizontal plane for the die head (i.e., the lifting welding head) to descend and press together. The overlap of the barrel is relatively flat and firm, and the range is large. It can adapt to the oblique overlap or the straight overlap with a larger width for overlap connection. The support plane 131 is relatively symmetrical up and down, which is convenient for processing. When the side mold 14 and the center mold 13 are used as a split assembly structure, the left and right side surfaces 133 of the center mold 13 are symmetrical to each other. The left and right side surfaces of the support plane 131 are isosceles, and the left and right side surfaces of the support plane 131 are an isosceles triangle support area or an isosceles trapezoid support area. The structure is relatively reasonable and convenient for processing. The inner side 145 of the side mold 14 and the left and right side surfaces 133 of the center mold 13 are respectively set as planes, which are convenient for processing and assembly. The structure can be stable when the side mold 14 and the center mold 13 can adopt a plane-to-plane matching method, and the plane can adopt a vertical plane.

[0050] The outer ends 31 of the right flip clamp and / or the left flip clamp 3 are relatively long, that is, the outer ends 31 of the clamps exceed the side positions of the center mold 13 when they are embraced, so as to achieve over-pressure when embracing and pressing the paper, and prevent the left and right sides of the paper from interfering with each other when they are enclosed and overlapped.

Claims

1. A barrel forming mechanism, comprising a barrel forming mold, a cup clamp device and an ultrasonic welding device, wherein the barrel forming mold comprises a mold body (1), the cup clamp device comprises a left flip clamp (3), a right flip clamp and a lifting top block, the ultrasonic welding device comprises a lifting welding head, the left flip clamp (3) and the right flip clamp are respectively arranged on the left and right sides of the mold body (1), the lifting top block is arranged below the mold body (1), and the lifting welding head is arranged above the mold body (1), characterized in that: The mold body (1) comprises a center mold (13) and side molds (14) connected to left and right side surfaces (133) of the center mold (13); the center mold (13) has support planes (131) on the upper and lower sides respectively; the inner side (145) of the side mold (14) is connected to the center mold (13); the outer side of the side mold (14) has a support curved surface (141); the support plane (131) and the support curved surface (141) are connected to form a barrel support surface (100); the surface of the support curved surface (141) is also provided with an air outlet (142); the mold body (1) is provided with an air duct (15), the air duct (15) is connected to the air outlet (142); the mold body (1) is also provided with an air inlet (143), the air inlet (143) is connected to the air duct (15); The rear side of the central mold (13) is connected to a water receiving seat (2), and the central mold (13) is provided with a longitudinal channel (10); the water receiving seat (2) is provided with a first water receiving port (21), a second water receiving port (22), a water passage (23) and a longitudinal water passage pipe (20); the water passage (23) is connected to the longitudinal channel (10); a baffle (24) is provided between the first water receiving port (21) and the water passage (23); the longitudinal water passage pipe (20) is connected to the baffle (24); the first water receiving port (21) is connected to the rear end of the longitudinal water passage pipe (20); the front end of the longitudinal water passage pipe (20) passes through the water passage channel (23) and extends into the longitudinal channel (10); the second water receiving port (22) is connected to the water passage channel (23); The supporting curved surface (141) comprises an arc surface (1411), the upper end of the supporting curved surface (141) is connected to the upper supporting plane (131), and the lower end of the supporting curved surface (141) is connected to the lower supporting plane (131).

2. The barrel forming mechanism according to claim 1, characterized in that: The first water receiving port (21) is arranged longitudinally, the water passage (23) is arranged longitudinally, the first water receiving port (21), the longitudinal water passage pipe (20) and the longitudinal hole (10) are arranged coaxially, and the second water receiving port (22) is arranged radially.

3. The barrel forming mechanism according to claim 1 or 2, characterized in that: The longitudinal water pipe (20) extends into the end of the longitudinal hole (10); the front end of the longitudinal water pipe (20) cooperates with the end of the longitudinal hole (10) to form a water return gap; water gaps are respectively left between the longitudinal water pipe (20) and the longitudinal hole (10), and between the longitudinal water pipe (20) and the water passage (23); the first water receiving port (21), the longitudinal water pipe (20), the longitudinal hole (10), the water passage (23) and the second water receiving port (22) are sequentially connected to form a water channel; the longitudinal hole (10) and the water receiving seat (2) are screwed or tightly connected by thread fastening.

4. The barrel forming mechanism according to claim 1, characterized in that: The longitudinal channel (10) is centrally arranged relative to the mold body (1); the mold body (1) further comprises a positioning block (11) for matching with a positioning hole of a support plate connected to the frame, the positioning block (11) being located at the rear side of the mold body (1); the mold body (1) further comprises a mounting seat (12), the mounting seat (12) being connected to the support plate; the positioning block (11) is centrally arranged relative to the mold body (1), the water receiving seat (2) being mounted and connected to the positioning block (11) and connected to the longitudinal channel (10); The first water receiving port (21) is located at the rear side of the water receiving seat (2), and the water passage (23) is located at the front of the water receiving seat (2); the longitudinal channel (10) is located at the rear of the mold body (1), and the end of the longitudinal channel (10) is arranged to face backwards; the water receiving seat (2) is connected to the rear side of the mold body (1).

5. The barrel forming mechanism according to claim 1, characterized in that: The air channel (15) comprises an air groove (144), the air groove (144) is arranged on the inner side (145) of the side mold (14), the air inlet (143) is arranged on the side mold (14), and the air inlet (143) and the air outlet (142) are respectively connected to the air groove (144).

6. The barrel forming mechanism according to claim 1, characterized in that: The air outlet (142) is arranged on the supporting curved surface (141) to be inclined outward and forward; the supporting curved surface (141) is also provided with a demoulding groove (146); The demoulding groove (146) is arranged from the back to the front, and the rear end of the side mold (14) has a demoulding component forward movement entrance (148) of the demoulding groove (146); The side mold (14) and the center mold (13) are connected via fasteners; a first connection hole (147) is provided on the side mold (14), and a second connection hole (132) is provided on the center mold (13); the first connection hole (147) is arranged in a demoulding groove (146), and the center mold (13) is respectively provided with a second connection hole (132); and the first connection hole (147) and the second connection hole (132) are connected via fasteners.

7. The barrel forming mechanism according to claim 1, characterized in that: The supporting curved surface (141) and the supporting plane (131) are smoothly connected; the arc surface (1411) is a semi-circular arc surface (1411), and the arc surface (1411) and the supporting plane (131) are tangentially connected.

8. The barrel forming mechanism according to claim 1, characterized in that: The supporting curved surface (141) and the supporting plane (131) are smoothly connected; the arc surface (1411) is a poor arc surface.

9. The barrel forming mechanism according to claim 8, characterized in that: The supporting curved surface (141) further includes a transition connecting curved surface (1413), and the upper and lower ends of the inferior arc surface are smoothly connected to the supporting plane (131) by the transition connecting curved surface (1413); the two ends of the transition connecting curved surface (1413) are tangentially connected to the circular arc transition surface and the supporting plane (131) respectively; The transition connection curved surface (1413) adopts an inward-contracted arc transition surface (1412).

10. The barrel forming mechanism according to claim 1, characterized in that: The support plane (131) is set as a horizontal plane, and the support plane (131) is relatively symmetrical up and down; the left and right side surfaces (133) of the center mold (13) are symmetrical to each other; the left and right side edges of the support plane (131) are isosceles, and an isosceles triangle support area or an isosceles trapezoid support area is between the left and right side edges of the support plane (131); the inner side (145) of the side mold (14) and the left and right side surfaces (133) of the center mold (13) are respectively set as planes.

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