Cone paper bowl forming machine

Abstract

The invention discloses a conical paper bowl forming machine, comprising a base, characterized in that: a turntable is provided on the base, a plurality of circumferentially distributed forming lower molds are provided on the turntable, and a bowl bottom forming mechanism, a bowl body forming mechanism, a bowl body pressing mechanism, a bowl body bottom pulling mechanism, a bowl body bottom folding mechanism and a sealing mechanism are sequentially arranged on the rotation path of the forming lower mold; the forming lower mold contains a conical surface for covering the inverted bowl body and a cavity located at the upper part, a forming mold is provided in the cavity, the forming mold is connected to the upper end of the lifting outer ejector rod, the forming mold is provided with a groove matching to accommodate the inverted bowl bottom, a supporting plate is provided in the groove, the supporting plate is connected to the upper end of the lifting inner ejector rod, and the lifting inner ejector rod and the lifting outer ejector rod are slidably sleeved with each other; the bowl body bottom pulling mechanism cooperates with the forming lower mold to straighten the bottom of the bowl body, and the bowl body bottom folding mechanism cooperates with the forming lower mold to fold the bottom of the bowl body. The invention has a reasonable structure, high efficiency and stability, and realizes the production and forming of conical paper bowls.

Description

Technical Field

[0001] The invention relates to an improved invention in the field of paper container forming, and in particular to an improved invention of a conical paper bowl forming machine. Background Art

[0002] Most existing paper bowls are cylindrical in structure, and cylindrical paper bowls can be connected to each other, so the outer circle of the cylindrical paper bowl has a little taper. At the same time, in order to enhance the structural strength of the cylindrical paper bowl and improve practicality, the bowl mouth of the cylindrical paper bowl is usually provided with a curling edge. In order to increase the capacity of the paper bowl and make it easier to hold, the taper of the outer circle of the paper bowl can be increased. However, when the taper is increased, it will cause trouble for the folding bottom of the paper bowl, and the original equipment will not be able to adapt. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a conical paper bowl forming machine with reasonable structure, high efficiency and stability.

[0004] In order to solve the above technical problems, the present invention is implemented by adopting the following technical scheme: the conical paper bowl forming machine includes a machine base, characterized in that: a turntable is provided on the machine base, a plurality of circumferentially distributed forming lower dies are provided on the turntable, and a bowl bottom forming mechanism, a bowl body forming mechanism, a bowl body pressing mechanism, a bowl body bottom pulling mechanism, a bowl body bottom folding mechanism and a sealing mechanism are sequentially arranged on the rotation path of the forming lower die; the forming lower die contains a conical surface for covering the inverted bowl body and a cavity located at the upper part, a forming mold is provided in the cavity, the forming mold is connected to the upper end of the lifting outer push rod, the forming mold is provided with a groove matching to accommodate the inverted bowl bottom, a support plate is provided in the groove, the support plate is connected to the upper end of the lifting inner push rod, the lifting inner push rod and the lifting outer push rod are slidably sleeved with each other; the bowl body bottom pulling mechanism and the forming lower die cooperate with each other to straighten the bottom of the bowl body, and the bowl body bottom folding mechanism and the forming lower die cooperate with each other to fold the bottom of the bowl body.

[0005] The bowl body pressing mechanism comprises a pressing plate which can be raised and lowered and is located above the lower forming die, and the pressing plate is pressed and matched with the bottom of the bowl body.

[0006] The bowl body bottom pulling mechanism includes a bottom pulling die, which can be raised and lowered and is arranged above the forming lower die. The bottom pulling die is provided with a cylindrical cavity and a conical cavity distributed up and down. The conical cavity wall matches and fits with the conical surface of the forming lower die, and the cylindrical cavity wall cooperates with the outer circle of the forming die to straighten the bottom of the bowl body.

[0007] The bowl body bottom folding mechanism includes a bottom folding mold, which can be elastically movably sleeved on the lower end of the driving rod, and the driving rod can be raised and lowered and arranged above the forming lower mold. The bottom folding mold is provided with a cylindrical cavity and a conical cavity distributed up and down, and the conical cavity wall matches and fits with the conical surface of the forming lower mold. A folding bottom plate is provided in the cylindrical cavity, and the folding bottom plate is fixed to the lower end of the driving rod.

[0008] The sealing mechanism includes a first ultrasonic welding device and a second ultrasonic welding device with offset welding cooperation.

[0009] A linkage spring is arranged between the lifting inner ejector rod and the lifting outer ejector rod, and a return spring is arranged between the lifting outer ejector rod and the forming lower die.

[0010] The beneficial effect of the present invention is that the improved conical paper bowl forming machine has a reasonable structure, high efficiency and stability. By sequentially arranging a bowl bottom forming mechanism, a bowl body forming mechanism, a bowl body pressing mechanism, a bowl body bottom pulling mechanism, a bowl body bottom folding mechanism and a sealing mechanism on the rotation path of the forming lower die, the bowl bottom is formed in the forming lower die, the bowl body is formed in the forming lower die, the bottom of the bowl body is straightened, the bottom of the bowl body is folded, and the folded bottom of the bowl body is sealed with the bowl bottom. The bottom of the bowl body is straightened to meet the folding requirement, thereby realizing the folding bottom forming of the conical bowl body. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0012] Figure 1 It is a schematic diagram of the structure of the present invention.

[0013] Figure 2 It is a structural diagram of the bowl body pressing mechanism of the present invention.

[0014] Figure 3 It is a structural diagram of the bowl bottom pulling mechanism of the present invention.

[0015] Figure 4 It is a structural diagram of the bowl body folding bottom mechanism of the present invention.

[0016] Figure 5 It is a structural diagram of the sealing mechanism of the present invention. DETAILED DESCRIPTION

[0017] The accompanying drawings show the structure of the present invention, and the following further describes its relevant details in conjunction with the accompanying drawings. Figure 1-5The conical paper bowl forming machine comprises a machine base 1, a turntable 2 is arranged on the machine base 1, the turntable 2 is equipped with a rotary drive structure, a plurality of circumferentially distributed forming lower molds 3 are arranged on the turntable 2, and a bowl bottom forming mechanism 4, a bowl body forming mechanism 5, a bowl body pressing mechanism 6, a bowl body bottom pulling mechanism 7, a bowl body bottom folding mechanism 8 and a sealing mechanism 9 are sequentially arranged on the rotation path of the forming lower mold 3; the forming lower mold 3 comprises a conical surface 31 for covering the inverted bowl body and a cavity 32 located at the upper part, and the cavity 32 A forming mold 33 is provided inside, and the forming mold 33 is connected to the upper end of the lifting outer push rod 34. The forming mold 33 is provided with a groove 35 matching to accommodate the inverted bowl bottom, and a support plate 36 is provided in the groove 35. The support plate 36 is connected to the upper end of the lifting inner push rod 37, and the lifting inner push rod 37 and the lifting outer push rod 34 are slidably sleeved with each other; the bowl body bottom pulling mechanism 7 cooperates with the forming lower mold 3 to straighten the bottom of the bowl body, and the bowl body bottom folding mechanism 8 cooperates with the forming lower mold 3 to fold the bottom of the bowl body. Among them, the bowl bottom forming mechanism 4 and the bowl body forming mechanism 5 are both existing structures, which will not be described in detail here.

[0018] The working principle of the present invention is that the lower forming mold 3 rotates with the turntable 2, and passes through the bowl bottom forming mechanism 4, the bowl body forming mechanism 5, the bowl body pressing mechanism 6, the bowl body bottom pulling mechanism 7, the bowl body bottom folding mechanism 8 and the sealing mechanism 9 in sequence. Specifically, in the first step, the bowl bottom forming mechanism 4 performs die-cutting and pressing molding on the flat paper to obtain the bowl bottom (including the connected bottom surface and the surrounding wall), and sends the inverted bowl bottom to the groove 35 of the forming mold 33 and is built into the support plate 36; in the second step, the bowl body forming mechanism 5 performs leaf wrapping molding on the fan-shaped paper to obtain paper bowl, and cover the inverted paper bowl on the conical surface 31 of the molding lower mold 3; in the third step, the bowl body pressing mechanism 6 presses the bowl body downward to further fit the conical surface 31 of the molding lower mold 3; in the fourth step, the bowl body bottom pulling mechanism 7 cooperates with the rising of the molding mold 33 to straighten the bottom of the bowl body, and then the molding mold 33 moves down and resets; in the fifth step, the bowl body bottom folding mechanism 8 descends to fold the straightened part of the bottom of the bowl body; in the sixth step, the supporting plate 36 moves up to support the bottom of the bowl, and the sealing mechanism 9 seals the folded bottom part of the bowl body with the surrounding wall of the bottom of the bowl.

[0019] As a further improved specific implementation method, see the attached Figure 2 The bowl body pressing mechanism 6 includes a pressing plate 61 which can be raised and lowered and is located above the lower forming mold 3. Preferably, the pressing plate 61 is driven to rise and fall by a cylinder and a guide rod, and the pressing plate 61 is pressed and matched with the bottom of the bowl body.

[0020] As a further improved specific implementation method, see the attached Figure 3The bowl body bottom pulling mechanism 7 includes a bottom pulling die 71, which can be lifted and lowered and arranged above the lower forming die 3. Preferably, the bottom pulling die 71 is driven to lift and lower by a cam connecting rod in cooperation with a guide rod. The bottom pulling die 71 is provided with a cylindrical cavity 72 and a conical cavity 73 distributed up and down. The conical cavity wall matches and fits with the conical surface of the lower forming die 3, and the cylindrical cavity wall matches with the outer circle of the forming die 33 to straighten the bottom of the bowl body. During operation, the bottom pulling die 71 descends, and its conical cavity wall fits with the conical surface of the lower forming die 3 to position the bowl body. Then, the lifting push rod drives the support plate 36 and the forming die 33 to rise. The outer circle of the forming die 33 matches with the cylindrical cavity wall of the bottom pulling die 71 to straighten and shape the bottom of the bowl body, and then the forming die 33 moves down and resets.

[0021] As a further improved specific implementation method, see the attached Figure 4 The bowl body folding mechanism 8 includes a folding bottom mold 81, which can be elastically movably sleeved on the lower end of a driving rod 82, preferably the two are connected by a spring 83, the driving rod 82 can be lifted and lowered and arranged above the lower forming mold 3, preferably the driving rod is driven by a cam connecting rod, the folding bottom mold 81 is provided with a cylindrical cavity 84 and a conical cavity 85 distributed up and down, the conical cavity wall matches and fits with the conical surface of the lower forming mold 3, and a folding bottom plate 86 is provided in the cylindrical cavity, and the folding bottom plate 86 is fixed to the lower end of the driving rod 82. When working, the driving rod 82 drives the folding bottom mold 81 and the folding bottom plate to move downward, the conical cavity of the folding bottom mold 81 is pre-fitted with the conical surface 31 of the lower forming mold 3 to position the bowl body, and then the folding bottom plate 86 continues to move downward to act on the straightened part of the bottom of the bowl body (the straightened part is not vertical, but slightly inclined inward), and folds it into the groove 35 of the forming mold 33.

[0022] As a further improved specific implementation method, see the attached Figure 5 The sealing mechanism 9 includes a first ultrasonic welding device 91 and a second ultrasonic welding device 92 with staggered welding. The first ultrasonic welding device 91 and the second ultrasonic welding device 92 are existing structures, and both include an ultrasonic welding head located outside the bowl body and a paper supporting slider located inside the bowl body.

[0023] As a further improved specific implementation method, see the attached Figure 3Or 4, a linkage spring 38 is provided between the lifting inner push rod 37 and the lifting outer push rod 34, specifically, the linkage spring 38 is sleeved on the lower end of the lifting inner push rod 37, and the lower end of the linkage spring 38 is connected to the lower end of the inner push rod 37, and the upper end of the linkage spring 38 is connected to the lower end of the outer push rod 34, and a reset spring 39 is provided between the lifting outer push rod 34 and the forming lower mold 3, specifically, the reset spring 39 is sleeved on the lower end of the outer push rod 34, the lower end of the reset spring 39 is connected to the lower end of the outer push rod 34, and the upper end of the reset spring 39 is connected to the forming lower mold 3, to realize the reset of the outer push rod 34, the above linkage setting shares a power source, saving cost and installation space. During operation, when the lifting inner push rod 37 is driven up or down by the power source, the lifting outer push rod 34 has a lift amount less than the lifting inner push rod 37 under the dual action of the return spring 39 and the linkage spring 38. Therefore, the support plate 36 and the forming mold 33 have different lift amounts. The support plate 36 can move up to support the bottom of the bowl and the folding bottom part for sealing, and the forming mold 33 will not interfere with the sealing.

[0024] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cone paper bowl forming machine, comprising a base, characterized in that: The machine base is provided with a turntable, on which are provided a plurality of circumferentially distributed forming lower dies, and the rotating path of the forming lower dies is sequentially provided with a bowl bottom forming mechanism, a bowl body forming mechanism, a bowl body pressing mechanism, a bowl body bottom pulling mechanism, a bowl body bottom folding mechanism and a sealing mechanism; the forming lower die contains a conical surface for covering the inverted bowl body and a cavity located at the upper part, in which a forming die is provided, and the forming die is connected to the upper end of the lifting outer ejector rod, and the forming die is provided with a groove matching and accommodating the inverted bowl bottom, and in the groove is provided a supporting plate, which is connected to the upper end of the lifting inner ejector rod, and the lifting inner ejector rod and the lifting outer ejector rod are slidably sleeved with each other; the bowl body bottom pulling mechanism and the forming lower die cooperate with each other to straighten the bottom of the bowl body, The bowl body bottom folding mechanism cooperates with the forming lower die to fold the bottom of the bowl body; the bowl body bottom pulling mechanism includes a bottom pulling die, which can be lifted and lowered and is arranged above the forming lower die, and the bottom pulling die is provided with a cylindrical cavity and a conical cavity distributed up and down, the conical cavity wall matches and fits with the conical surface of the forming lower die, and the cylindrical cavity wall cooperates with the outer circle of the forming mold to straighten the bottom of the bowl body; the bowl body bottom folding mechanism includes a bottom folding die, which can be elastically movably sleeved on the lower end of the driving rod, and the driving rod can be lifted and lowered and is arranged above the forming lower die, and the bottom folding die is provided with a cylindrical cavity and a conical cavity distributed up and down, the conical cavity wall matches and fits with the conical surface of the forming lower die, and a folding bottom plate is provided in the cylindrical cavity, and the folding bottom plate is fixed to the lower end of the driving rod.

2. The cone-shaped paper bowl forming machine according to claim 1, characterized in that: The bowl body pressing mechanism comprises a pressing plate which can be raised and lowered and is located above the lower forming die, and the pressing plate is pressed and matched with the bottom of the bowl body.

3. The cone-shaped paper bowl forming machine according to claim 1, characterized in that: The sealing mechanism includes a first ultrasonic welding device and a second ultrasonic welding device with offset welding cooperation.

4. The cone-shaped paper bowl forming machine according to claim 1, characterized in that: A linkage spring is arranged between the lifting inner ejector rod and the lifting outer ejector rod, and a return spring is arranged between the lifting outer ejector rod and the forming lower die.

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