A roll-up forming mechanism of a paper cup forming machine

Abstract

The utility model relates to a kind of mouth curling forming mechanisms of paper cup forming machine, including carousel, the carousel is equipped with at least one for paper cup is placed into recess mould, it is characterized by: the carousel top is equipped with the edge curling seat board that can be lifted, the edge curling seat board is equipped with the first pre-rolling mechanism that cup mouth edge is curled to horn shape outside to make it constitute first pre-rolled edge, the second pre-rolling mechanism that first pre-rolled edge is further curled to edge towards cup body central axis to make it constitute second pre-rolled edge and the final rolling mechanism that second pre-rolled edge is further curled to make it curling closure, the recess mould axial center can pass first pre-rolling mechanism, second pre-rolling mechanism and final rolling mechanism axial center in turn, dispense with water treatment step, avoid the problem caused by water treatment to appear.

Description

Technical Field

[0001] This utility model relates to the field of paper cup forming machines, specifically to a paper cup forming mechanism for a paper cup forming machine. Background Technology

[0002] Currently, when paper cup machines process paper cups, the cup rim is formed through a pre-winding and a final winding process. If the paper is not moistened during the pre-winding process, the cup rim may curl excessively during the single pre-winding process. Furthermore, the high speed of the paper cup machine leads to stress concentration, making the cup rim prone to breakage. To prevent this, existing paper cup processing methods typically involve moistening the paper before forming. However, this moistening process presents several problems: 1. It requires a significant amount of water, resulting in waste; 2. The moistened paper needs time to dry before proceeding to subsequent processing steps, extending the production cycle and reducing efficiency; 3. Uneven moistening can lead to some areas of the paper being too wet while others are too dry, affecting the forming quality and appearance of the paper cup, and potentially causing deformation or breakage during use; 4. Excessive wetting can reduce the paper's strength. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology.

[0004] A paper cup forming machine with a rolled mouth forming mechanism is provided, which eliminates the need for a water injection process and avoids problems caused by water injection.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rim forming mechanism for a paper cup forming machine, comprising a turntable, wherein the turntable is provided with at least one concave mold for inserting paper cups therein, characterized in that: a lifting and lowering edge-rolling seat plate is provided above the turntable, the edge-rolling seat plate is provided with a first pre-rolling mechanism for rolling the edge of the cup rim outward to a trumpet shape to form a first pre-rolled edge, a second pre-rolling mechanism for further rolling the first pre-rolled edge to the edge facing the central axis of the cup body to form a second pre-rolled edge, and a final rolling mechanism for further rolling the second pre-rolled edge to close the rolled edge, wherein the axial center of the concave mold can sequentially pass through the axial center of the first pre-rolling mechanism, the second pre-rolling mechanism and the final rolling mechanism.

[0006] A further feature of this invention is that the first pre-winding mechanism, the second pre-winding mechanism, and the final winding mechanism all include a curling mold. The bottom end of the curling mold is provided with a curling surface that can guide the edge of the paper cup rim to gradually curl outwards. The curling surface is arranged in a ring structure.

[0007] A further feature of this invention is that the concave mold has a placement cavity for placing paper cups therein, and the top opening of the placement cavity is surrounded by a final roll surface that can guide the second pre-rolled edge to roll further.

[0008] A further feature of this invention is that each of the edge-rolling molds has a pressing block at its lower end that can extend into the paper cup. The pressing block is axially slidably connected to the edge-rolling mold. An elastic element is provided between the edge-rolling mold and the pressing block. During the downward movement of the edge-rolling mold, the pressing block can elastically clamp the paper cup through the elastic element and in conjunction with the concave mold.

[0009] The present invention, possessing the above-mentioned features, is as follows: The cup body is placed inside the concave mold. When the concave mold rotates to below the edge-rolling mold of the first pre-winding mechanism, the edge-rolling mold and the pressure block of the first pre-winding mechanism move downwards. The pressure block of the first pre-winding mechanism, in conjunction with the concave mold, elastically clamps the paper cup. At this time, there is a gap between the cup rim and the first edge-rolling mold and the concave mold. The edge-rolling mold of the first pre-winding mechanism further moves downwards, and the edge-rolling surface of the edge-rolling mold of the first pre-winding mechanism rolls the edge of the cup rim outwards to a trumpet shape, forming the first pre-rolled edge. The concave mold further moves to below the edge-rolling mold of the second pre-winding mechanism. The edge-rolling mold and the pressure block of the second pre-winding mechanism move downwards, and the pressure block of the second pre-winding mechanism, in conjunction with the concave mold, elastically clamps the paper cup. At this time, the first pre-rolled edge… There is a gap between the second pre-rolling mechanism and the die, and the gap between the first pre-rolled edge and the die of the second pre-rolling mechanism is smaller than the gap between the cup mouth and the edge-rolling die of the first pre-rolling mechanism. The edge-rolling die of the second pre-rolling mechanism moves further downward, and the edge-rolling surface of the edge-rolling die of the second pre-rolling mechanism rolls the first pre-rolled edge further into a second pre-rolled edge with the edge facing the axis of the cup body. The die moves again to below the edge-rolling die of the final rolling mechanism. The pressure block of the final rolling mechanism moves downward and cooperates with the die to elastically clamp the cup body, and the second pre-rolled edge is placed on the final rolling surface. The edge-rolling die of the final rolling mechanism moves further downward, and the edge-rolling surface of the edge-rolling die of the final rolling mechanism cooperates with the final rolling surface to further flip and shape the second pre-rolled edge.

[0010] A further feature of this invention is that the placement cavity gradually narrows from top to bottom.

[0011] The present invention, which has the above-mentioned features, has a conical placement cavity that fits the paper cup better.

[0012] A further feature of this invention is that the edge-rolling molds of the first pre-rolling mechanism and the second edge-rolling mechanism are rotatably mounted on the edge-rolling base plate, and the edge-rolling molds of the first pre-rolling mechanism and the second edge-rolling mechanism are provided with a rotary drive mechanism for driving both to rotate.

[0013] The present invention having the above features has the following characteristics: the edge-rolling molds of the first pre-rolling mechanism and the second edge-rolling mechanism can rotate, making the edge-rolling smoother.

[0014] The beneficial effects of this utility model are: pre-rolling the edge in two steps reduces the pressure on the cup rim during each rolling, avoids edge breakage, and achieves edge rolling without water treatment, thus avoiding problems caused by water treatment.

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a perspective view of an embodiment of the present utility model.

[0017] Figure 2 This is a cross-sectional schematic diagram of the concave mold according to an embodiment of the present utility model.

[0018] Figure 3 This is a cross-sectional schematic diagram of the edge-rolling mold according to an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the structure of the cup body in an embodiment of the present invention, showing the cup rim rolled up to form the first pre-rolled edge.

[0020] Figure 5 This is a schematic diagram of the structure of the cup body in an embodiment of the present invention, showing the cup rim rolled up to form a second pre-rolled edge.

[0021] Figure 6 This is a schematic diagram of the structure of the second pre-rolled edge of the cup body further rolled up to close the rolled edge in an embodiment of the present invention. Detailed Implementation

[0022] like Figure 1 —— Figure 3 The illustrated paper cup forming machine includes a rim forming mechanism, comprising a turntable 1 driven by a motor (a conventional technology, not described in detail here). The turntable 1 is equipped with at least one concave mold 2 for inserting paper cups. In this embodiment, multiple concave molds 2 are arranged circumferentially on the turntable. A lifting and lowering edge-forming plate 3 is provided above the turntable 1. The edge-forming plate is equipped with a lifting drive mechanism for lifting and lowering. The lifting drive mechanism refers to the lifting drive assembly disclosed in patent number CN216466481U, which is not described in detail here and is not shown in the figure. The edge-forming plate 3 is configured to curl the cup rim outwards into a trumpet shape, forming a shape such that… Figure 4 The first pre-rolling mechanism 4, as shown, further rolls the first pre-rolled edge until the edge faces the central axis of the cup body, thus forming the shape shown. Figure 5 The second pre-rolling mechanism 5 shown above, which further curls the second pre-rolled edge to make it as shown in the figure, is a second pre-rolling mechanism 5. Figure 6The shown edge-curling and closing final winding mechanism 6 has a concave mold 2 whose axial center can sequentially pass through the axial centers of the first pre-winding mechanism 4, the second pre-winding mechanism 5, and the final winding mechanism 6. The first pre-winding mechanism 4, the second pre-winding mechanism 5, and the final winding mechanism 6 all include an edge-curling mold 7. The bottom end of the edge-curling mold 7 is provided with an edge-curling surface 701 that guides the edge of the paper cup rim to gradually curl outwards. The edge-curling surface 701 has an annular structure. The concave mold 2 has a placement cavity 201 for placing the paper cup therein. The top opening of the placement cavity 201 is surrounded by a final winding surface 202 that guides the second pre-curled edge to further curl. Each edge-curling mold 7 has a pressing block 8 at its lower end that can extend into the paper cup. The pressing block 8 is axially slidably connected to the edge-curling mold 7. An elastic element 9, preferably a spring, is provided between the edge-curling mold 7 and the pressing block 8. During the downward movement of the edge-curling mold 7, the pressing block 8 can... The paper cup is elastically clamped by the elastic element 9 and the concave mold 2. The placement cavity 201 gradually shrinks from top to bottom. The edge-rolling molds 7 of the first pre-winding mechanism 4 and the second edge-rolling mechanism 5 are rotatably mounted on the edge-rolling seat plate 3. The first pre-winding mechanism 4 and the edge-rolling mold 7 of the second edge-rolling mechanism 5 are provided with a rotary drive mechanism to drive them to rotate. The rotary drive mechanism is a rotary motor. The output end of the rotary drive mechanism is linked to the pre-winding mold 7 of the first pre-winding mechanism 4 through a flexible belt. The pre-winding mold 7 of the first pre-winding mechanism 4 is linked to the pre-winding mold of the second pre-winding mechanism through a synchronous belt. The height-adjustable support 10 is provided below the first pre-winding mechanism 4, the second pre-winding mechanism 5 and the third pre-winding mechanism 6 respectively. The structure of the support 10 is shown in the figure and will not be described in detail here. The support 10 further positions the height of the cup body in the concave mold 2 and provides additional support for edge rolling.

Claims

1. A rim forming mechanism for a paper cup forming machine, comprising a turntable, the turntable being provided with at least one concave mold for inserting a paper cup therein, characterized in that: Above the turntable is a lifting and lowering edge-rolling seat plate. The edge-rolling seat plate is equipped with a first pre-rolling mechanism that rolls the edge of the cup mouth outward to a trumpet shape to form a first pre-rolled edge, a second pre-rolling mechanism that further rolls the first pre-rolled edge to the edge facing the central axis of the cup body to form a second pre-rolled edge, and a final rolling mechanism that further rolls the second pre-rolled edge to close the rolled edge. The axial center of the die can pass through the axial center of the first pre-rolling mechanism, the second pre-rolling mechanism and the final rolling mechanism in sequence.

2. The rim forming mechanism of a paper cup forming machine according to claim 1, characterized in that: The first pre-winding mechanism, the second pre-winding mechanism, and the final winding mechanism all include a curling mold. The bottom end of the curling mold is provided with a curling surface that can guide the edge of the paper cup rim to gradually curl outwards. The curling surface is arranged in a ring structure.

3. The rim forming mechanism of a paper cup forming machine according to claim 1, characterized in that: The concave mold is provided with a placement cavity for placing paper cups therein, and the top opening of the placement cavity is surrounded by a final roll surface that can guide the second pre-rolled edge to roll further.

4. The rim forming mechanism of a paper cup forming machine according to claim 2, characterized in that: Each of the above-mentioned edge-rolling dies has a pressing block at its lower end that can extend into the paper cup. The pressing block is axially slidably connected to the edge-rolling die. An elastic element is provided between the edge-rolling die and the pressing block. During the downward movement of the edge-rolling die, the pressing block can elastically clamp the paper cup through the elastic element and cooperate with the concave die.

5. The rim forming mechanism of a paper cup forming machine according to claim 3, characterized in that: The placement cavity is designed to gradually narrow from top to bottom.

6. The rim forming mechanism of a paper cup forming machine according to claim 4, characterized in that: The edge-rolling dies of the first pre-rolling mechanism and the second edge-rolling mechanism are rotatably mounted on the edge-rolling base plate. The edge-rolling dies of the first pre-rolling mechanism and the second edge-rolling mechanism are provided with a rotary drive mechanism to drive the two to rotate.

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