Paper cup stacking structure without cup blocking and forming process of the stacking structure

Abstract

The present application relates to a kind of paper cup stack does not stick cup stack structure and its stack structure forming process, including the cup body of paper container, annular deformation part is provided at the position of cup wall near cup base, annular boss is formed at annular deformation part in the upper and lower extrusion mode of cup body, the lower annular U-shaped groove with opening downward is formed below annular boss, lower annular groove is filled with glue, the two side walls of lower annular groove are adhered by glue, the annular deformation part is rolled out in the position of cup wall near cup bottom in the present application, then annular deformation part is bent and deformed into annular boss by heating extrusion mode, and glue is filled in the lower annular groove below annular boss, since the slot of lower annular groove is relatively narrow, the annular boss of annular deformation part is not or not easy to deform when slot filling glue is extruded under stress after glue solidification, ensure the reliability of stack structure, and then realize the effect of stack does not stick cup.

Description

Technical Field

[0001] This invention relates to the structure of cups made of paper materials and a method for manufacturing cups with such a structure. Background Technology

[0002] Current stackable, non-jamming cup structures, such as the invention disclosed in CN102205888A, involve a paper-based cup with a fillable inner cavity. This double-walled, heat-insulating cup has an inner cup and an outer circumferential surface. The inner cup is formed by a generally conical circumferential surface and a bottom surface, which are connected to each other in a liquid-sealed manner while forming a frame. The frame is formed by a U-shaped roll of the circumferential surface, in which an approximately right-angled edge of the basin-shaped bottom surface is inserted. After insertion, the frame is formed by bonding, pressing, and / or sealing the circumferential surface to the bottom surface.

[0003] The outer circumferential surface is advanced in a sleeve-like manner and also has a conical shape. The lower end of the outer circumferential surface is formed by a bottom roll. Below the horizontally arranged section of the bottom surface, the bottom roll of the outer circumferential surface abuts against the inner cup. The upper end of the outer circumferential surface abuts against the inner cup in an adjacent (angrenzen) mundrolle manner, which forms the upper end of the cup.

[0004] On the circumference of the inner cup, a deformable section, approximately one-quarter the height of the inner cavity, is provided in the form of a shoulder-shaped protrusion into the cavity. The shoulder is formed such that, viewed from the opening defined by the cup's rim towards the bottom, the diameter of the cavity abruptly decreases, with the circumference curving approximately horizontally toward the cup's central longitudinal axis. Immediately thereafter, the circumference extends parallel to the central longitudinal axis for a certain section, so as to achieve a conical shape again in the final section extending to the lower end of the cup. The shoulder thus protrudes into the cup's cavity. For the stability of the deformable section in the form of the shoulder, an adhesive seam (Klebstoffraupe) or adhesive channel is provided, arranged on the outer side of the circumference below the approximately horizontally extending section of the shoulder. The adhesive channel thus does not come into contact with the liquid injected into the cup's cavity. As can be seen from the figure, the adhesive channel is introduced into an approximately right-angled notch (Hohlkehle), which is formed on the outer side of the circumference opposite to the inner cavity by a shoulder-shaped part.

[0005] The shoulder is designed to hold cups of the same type together when multiple cups are stacked. Specifically, if two cups are stacked, the bottom roll of another cup of the same type is supported on the shoulder. The adhesive channel reinforces the deformable portion in the form of the shoulder, even under strong loads. Thus, even when many cups are stacked and when multiple stacked cups are placed suddenly, the cups do not jam against each other.

[0006] As attached Figure 1 As shown, in order to stabilize the deformable part in the form of a shoulder in the above structure, the adhesive channel is introduced into the near right-angled notch. The notch is formed by a shoulder-shaped shoulder on the outer side of the circumference opposite to the inner cavity. When the deformable part of the cup shoulder in the above structure is subjected to the pressure from above and below, the right-angled notch is insufficient to maintain the force of the deformable part to prevent it from deforming. It will deform the right-angled notch into an obtuse-angled notch. The top surface of the deformable part changes from a horizontal structure to an inclined structure. When the cups are stacked, the phenomenon of cup jamming will still occur. Summary of the Invention

[0007] The purpose of this invention is to provide a non-jamming stacking structure for paper cups and its molding process. This invention involves rolling an annular deformation section onto the cup wall near the bottom, then bending and shaping the annular deformation section into an annular protrusion through heating and extrusion. Adhesive is then filled into a lower annular groove below the annular protrusion. Because the opening of the lower annular groove is narrow, the annular protrusion of the annular deformation section will not deform or is not easily deformed when the adhesive solidifies and is subjected to pressure, ensuring the reliability of the stacking structure and thus achieving the effect of non-jamming stacking.

[0008] To achieve the above objectives, the following technical solution is adopted: A stacking structure for paper cups that prevents them from jamming includes a cup body made of paper. The cup body includes a cup wall that slopes downwards and a cup base. An annular deformation portion is provided on the cup wall near the cup base. Under axial compressive force, the annular deformation portion bends and deforms into an annular boss. A lower annular groove and an outer annular groove are formed on the outer side and below the annular boss, respectively. The outer annular groove is located on the inner side of the cup wall and its opening faces upwards. The lower annular groove is located on the outer side of the cup wall and its opening faces downwards. The lower annular groove is filled with glue, and the two side walls of the lower annular groove are bonded and fixed by glue.

[0009] The outer wall of the annular deformation part has a tapered circumference that tapers from bottom to top, and the outer diameter of the cup bottom is larger than the inner diameter of the annular boss and smaller than the outer diameter of the outer annular groove.

[0010] The cup body has an outward-curled edge at the top edge, and an outer paper is wrapped around the outside of the cup wall. The upper part of the outer paper abuts against or is close to the lower edge of the rolled edge, and the lower part of the outer paper extends to the outer wall of the bottom of the cup, wrapping the lower annular groove inside.

[0011] A molding process for a paper cup stacking structure that prevents cup jamming is characterized by the following steps: 1. Create the initial texture by rolling: The upper port of the cup body and the cup seat are positioned by a plunger and a fixed seat respectively. The plunger rotates, causing the cup body to rotate. The embossing head on the side of the cup body rolls out an inwardly recessed embossing pattern at the position of the annular deformation part on the cup wall, forming the prototype of the annular deformation part.

[0012] 2. Hot pressing: Remove the fixed seat on the cup holder and replace it with a heated extrusion head. The heated extrusion head wraps around the part below the annular deformation part on the cup body. The heated extrusion head softens the part below the annular deformation part of the cup body by heating. Then the heated extrusion head presses along the axial direction of the plunger. Since the strength is lowest at the annular deformation part of the cup wall, when the cup body is pressed by the heated extrusion head, the part below the annular deformation part of the cup body moves upward and causes the cup wall at the annular deformation part to bend and deform, thereby forming an upwardly protruding annular boss. The annular deformation part bends to form an outer annular groove and a lower annular groove on the outside and below the annular boss, respectively.

[0013] 3. Spin coating: Remove the heating extrusion head, align the glue dispensing head of the glue applicator with the groove of the lower annular groove, and rotate the plunger to drive the cup body to rotate in coordination with the glue applicator to fill the lower annular groove with glue.

[0014] 4. Extrusion molding: After the glue is applied, the outer circumference of the cup wall is fixed by the clamping device. The glue application device and plunger are removed. The upper extrusion plate and the lower extrusion plate are then placed against the upper port and the bottom of the cup body 1, respectively. The upper extrusion plate and the lower extrusion plate simultaneously extrude the cup body from the upper and lower sides towards the middle. The outer annular groove and the lower annular groove at the weak point of the structure are further deepened. After the glue has cured, the shape of the lower annular groove is fixed.

[0015] This invention upgrades the existing stacked structure of annular planar steps to a stacked structure of annular bosses. Since the annular bosses are formed by bending the weak points of the cup wall, a lower annular groove and an outer annular groove will naturally be formed below and on the outside of the annular bosses during molding. Then, glue is filled into the lower annular grooves to bond and fix them, thereby ensuring that the annular bosses will not or are not easily deformed, thus ensuring the reliability of the stacked structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the existing technology; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a schematic diagram of the structure of the outer paper covering the present invention; Figure 4This is a schematic diagram of the structure of step 1 of the present invention; Figure 5 This is a schematic diagram of the structure of step 2 of the present invention; Figure 6 This is a schematic diagram of the structure of step 3 of the present invention; Figure 7 This is a schematic diagram of the structure of step 4 of the present invention; Detailed Implementation

[0017] like Figure 2 , 3 As shown, a non-jamming stacking structure for paper cups includes a cup body 1 of a paper container. The cup body 1 includes a cup wall 11 that slopes downwards and a cup base 12. An annular deformation portion 13 is provided on the cup wall 11 near the cup base 12. Under axial compressive force, the annular deformation portion 13 bends and deforms into an annular boss 131. A lower annular groove 132 and an outer annular groove 133 are formed on the outer side and below the annular boss 131, respectively. The outer annular groove 133 is located on the cup wall 11. The inner side of the cup wall 11 and the opening is upward. The lower annular groove 132 is located on the outer side of the cup wall 11 and the opening is downward. The lower annular groove 132 is filled with glue 2. The two side walls of the lower annular groove 132 are bonded and fixed by glue 2. The outer wall of the cup bottom 12 to the annular deformation part 13 is a tapered circumference that tapers from bottom to top. The outer diameter of the cup bottom 12 is larger than the inner diameter of the annular boss 131 and smaller than the outer diameter of the outer annular groove 133, so as to ensure that when the cups are stacked, there is a gap between the outer edge of the cup bottom 12 and the cup wall, so as to ensure that the stacking does not jam the cups.

[0018] The forming process of the stacked structure of the present invention is as follows: Step 1: Position the upper port of the cup body 1 and the cup seat 12 using the plunger 51 and the fixed seat 52 respectively. Rotate the plunger 51 to drive the cup body 1 to rotate. The embossing head 53 on the side of the cup body 1 rolls out an inwardly recessed embossing pattern at the position of the annular deformation part 13 on the cup wall 11 of the cup body. The embossing pattern is the prototype of the annular deformation part 13.

[0019] Step 2: Remove the fixing seat 52 on the cup holder 12 and replace it with a heated extrusion head 54. The heated extrusion head 54 wraps around the part below the annular deformation part 13 on the cup body. The heated extrusion head 54 softens the part below the annular deformation part 13 of the cup body by heating. Then the heated extrusion head 54 presses along the axial direction of the plunger 51. Since the strength is lowest at the annular deformation part 13 of the cup wall, when the cup body is pressed by the heated extrusion head 54, the part below the annular deformation part 13 of the cup body 1 moves upward and causes the cup wall at the annular deformation part 13 to bend and deform, thereby forming an upwardly protruding annular boss 131. The annular deformation part 13 bends on the outside and below the annular boss 131 to form an outer annular groove 133 and a lower annular groove 132, respectively.

[0020] Step 3: Remove the heating extrusion head 54, align the glue outlet of the glue applicator 55 with the groove of the lower annular groove 132, and rotate the plunger 51 to drive the cup body 1 to rotate in coordination with the glue applicator 55 to fill the lower annular groove 132 with glue.

[0021] Step 4: After applying the adhesive, fix the outer periphery of the cup wall with the clamping device 56, remove the adhesive application device 55 and the plunger 51, and place the upper extrusion plate 57 and the lower extrusion plate 58 against the upper port and bottom of the cup body 1 respectively. The upper extrusion plate 57 and the lower extrusion plate 58 simultaneously extrude the cup body from the upper and lower sides towards the middle, further deepening the outer annular groove 133 and the lower annular groove 132 at the weak points of its structure. After the adhesive has cured, fix the shape of the lower annular groove 132.

[0022] This invention first weakens the strength of the cup wall by pressing the texture, then extrudes a preliminary annular boss structure at the texture by hot pressing, then fills the lower annular groove on the outside of the annular boss with glue, and finally deepens the annular groove by pressing from both above and below. After the glue cures, the annular boss will not or will not easily deform, thus ensuring the reliability of the stacked structure.

[0023] Furthermore, when the upper extrusion plate 57 and the lower extrusion plate 58 extrude the cup body, the cup wall at the lower edge of the annular deformation part 13 is forced to deform inward, causing the outer wall from the bottom 12 of the cup to the annular deformation part 13 to form a tapered circumference that contracts from bottom to top after the cup body is formed; while the cup wall above the annular deformation part 13 maintains a tapered circumference that contracts from top to bottom. The upper edge of the cup body 1 is provided with an outwardly rolled edge 14, and an outer paper 3 is wrapped around the outside of the cup wall 11. The upper part of the outer paper 3 abuts against or is close to the lower edge of the rolled edge 14, and the lower part of the outer paper 3 extends to the outer wall of the bottom 12 of the cup, wrapping the lower annular groove 132 inside. By wrapping an outer paper 3 around the outside of the cup body, both a decorative effect and a heat-preventing effect are achieved.

Claims

1. A stacking structure for paper cups that does not jam, comprising a cup body (1) of a paper container, said cup body (1) comprising a cup wall (11) that slopes downward from top to bottom and a cup base (12), characterized in that: An annular deformation part (13) is provided on the cup wall (11) near the cup seat (12). The annular deformation part (13) is bent and deformed into an annular boss (131) under the action of axial extrusion force. A lower annular groove (132) and an outer annular groove (133) are formed on the outer side and the bottom of the annular boss (131), respectively. The outer annular groove (133) is located on the inner side of the cup wall (11) and the opening faces upward. The lower annular groove (132) is located on the outer side of the cup wall (11) and the opening faces downward. The lower annular groove (132) is filled with glue (2). The two side walls of the lower annular groove (132) are bonded and fixed by glue (2).

2. The stacking structure for paper cups that does not jam as described in claim 1, characterized in that: The outer wall of the cup bottom (12) to the annular deformation part (13) forms a tapered circumference that contracts from bottom to top. The outer diameter of the cup bottom (12) is greater than the inner diameter of the annular boss (131) and smaller than the outer diameter of the outer annular groove (133).

3. The stacking structure for paper cups that does not jam as described in claim 1, characterized in that: The cup body (1) has an outwardly rolled edge (14) at the upper edge, and an outer paper (3) is wrapped around the outside of the cup wall (11). The upper part of the outer paper (3) abuts or is close to the lower edge of the rolled edge (14), and the lower part of the outer paper (3) extends to the outer wall of the cup bottom (12) to wrap the lower annular groove (132) inside.

4. A molding process for a paper cup stacking structure that prevents cup jamming, characterized in that... The following steps are required:

1. Rolling out the initial texture: Position the upper end of the cup body and the cup seat using the plunger and the fixed seat respectively. Rotate the plunger to drive the cup body to rotate. The embossing head on the side of the cup body rolls out a ring of embossed texture at the position of the annular deformation part on the cup wall, forming the prototype of the annular deformation part.

2. Hot pressing: Remove the fixed seat on the cup holder and replace it with a heated extrusion head. The heated extrusion head wraps around the part below the annular deformation part on the cup body. The heated extrusion head softens the part below the annular deformation part of the cup body by heating. Then the heated extrusion head presses along the axial direction of the plunger. Since the strength is lowest at the annular deformation part of the cup wall, when the cup body is pressed by the heated extrusion head, the part below the annular deformation part of the cup body moves upward and causes the cup wall at the annular deformation part to bend and deform, thereby forming an upwardly protruding annular boss. The annular deformation part bends to form an outer annular groove and a lower annular groove on the outside and below the annular boss, respectively.

3. Rotary application of adhesive: Remove the heated extrusion head, align the adhesive outlet of the adhesive application device with the groove of the lower annular groove, and rotate the plunger to drive the cup body to rotate in coordination with the adhesive application device to fill the lower annular groove with adhesive. IV. Extrusion Molding: After the glue is applied, the outer circumference of the cup wall is fixed by the clamping device. The glue application device and plunger are removed. The upper extrusion plate and the lower extrusion plate are respectively placed against the upper port and the bottom of the cup body 1. The upper extrusion plate and the lower extrusion plate simultaneously extrude the cup body from the upper and lower sides towards the middle. The outer ring groove and the lower ring groove at the weak point of its structure are further deepened. After the glue cures, the shape of the lower ring groove is fixed.

Images