Forming die for smoothly enclosed and lapped barrel body

Abstract

Side dies of a die body of the forming die are located on the left side face and the right side face of a center die, supporting planes are arranged on the upper side and the lower side of the center die respectively, supporting curved faces are arranged on the outer side faces of the side dies, and the supporting planes and the supporting curved faces are connected in a matched mode to define a cylinder supporting face. The supporting curved surface comprises an arc surface, the upper end of the supporting curved surface is connected with the supporting plane on the upper side, and the lower end of the supporting curved surface is connected with the supporting plane on the lower side. The supporting planes on the upper side and the lower side of the die body enable the whole die body to be flat, paper sheets can be well supported, lapping edge connection of inclined lapping edges or straight lapping edges with large width is facilitated, and it is ensured that the die head descends to be pressed on the die body to be matched and connected with the lapping edges at the surrounding position of a barrel body. Therefore, the inclined landing edge or the straight landing edge with larger width can be smoothly enclosed and overlapped; the left and right supporting curved surfaces of the die body can be well matched with supporting paper sheets to be held, and obvious edges, creases, scratches and the like are not prone to being generated on a cylinder body.

Description

Technical Field

[0001] The utility model relates to a die for overlapping and forming the tube body of a paper container. Background Art

[0002] Paper containers (such as paper cups or paper bowls, etc., which can be collectively referred to as paper cups for ease of explanation) and cup sleeves of outer cups, their cylindrical bodies are supported by a cup clamp structure (such as a left clamp, a right clamp, a top block, etc.) to hold the paper sheet on the upper forming mold. The cylindrical body is formed with the support of the forming mold. The paper sheet is surrounded outside the supporting surface of the forming mold. The left and right sides of the paper sheet (usually a fan-shaped paper sheet) overlap to form an overlap, and the die head of the ultrasonic device is pressed downward from the top to the forming mold so that the overlap is heated and bonded.

[0003] The left and right sides of a paper sheet (usually a fan-shaped sheet) overlap to form a lap. This lap can be designed as a straight lap or a diagonal lap. For example, a straight lap is formed when the left and right sides of the paper sheet (a fan-shaped sheet) are symmetrical, while a diagonal lap is formed when one side is straight and the other is diagonal. When overlapping a straight lap, the overlap area is increased to make the connection more secure, and the lap width is increased (widened)—this is called a wide lap. When overlapping a diagonal lap, the diagonal lap itself is set at an angle, and the (circumferential) span between the two ends of the lap (the upper and lower ends of the lap on the barrel) is also relatively large. Ensuring the smooth overlap of these wide and diagonal laps is crucial. Utility Model Content

[0004] 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 mold that can smoothly enclose and overlap.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solution: a barrel forming mold that smoothly encloses and overlaps, including a mold body, characterized in that: the mold body includes a center mold and side molds, the side molds are located on the left and right sides of the center mold, the upper and lower sides of the center mold respectively have support planes, the outer side surfaces of the side molds have support curved surfaces, the support planes and the support curved surfaces are coordinated and connected to form the barrel support surface; the support curved surface includes an arc surface, the upper end of the support curved surface is connected to the upper support plane, and the lower end of the support curved surface is connected to the lower support plane.

[0006] The following various optimizations or supplementary explanations can be made on the above technical solutions respectively.

[0007] For example, the support curved surface and the support flat surface are smoothly connected.

[0008] For example, the arc surface adopts a semi-circular arc surface, and the arc surface is tangently connected to the supporting plane.

[0009] For example, the arc surface adopts a minor arc surface. For example, the supporting curved surface also includes an inward-contracted arc transition surface, where the upper and lower ends of the minor arc surface are connected to the supporting plane through the inward-contracted arc transition surface; the two ends of the inward-contracted arc transition surface are tangentially connected to the minor arc surface and the supporting plane. For example, the supporting curved surface also includes a transition connection curved surface, where the upper and lower ends of the minor arc surface are smoothly connected to the supporting plane through the transition connection curved surface; the two ends of the transition connection curved surface are tangentially connected to the arc transition surface and the supporting plane.

[0010] For another example, the supporting plane is set as a horizontal plane, and the supporting plane is relatively symmetrical up and down; the side molds are installed and connected to the left and right sides of the center mold; the left and right sides of the center mold are symmetrical to each other.

[0011] For another example, the left and right sides of the support plane are isosceles, and an isosceles triangle support area or an isosceles trapezoid support area is formed between the left and right sides of the support plane.

[0012] As an additional optimization, the inner sides of the side molds and the left and right sides of the center mold are set to be flat.

[0013] The beneficial effect of the present invention is that in the barrel forming mold that is smoothly enclosed and overlapped, the supporting planes on the upper and lower sides of the mold body (its central mold part) make the mold body as a whole flat, which can better support the paper piece, and is conducive to the overlapping connection of the oblique edges or straight edges with larger widths, ensuring that the die head is lowered and pressed on the mold body to cooperate with the overlapping edges at the enclosed part of the barrel, so that the oblique edges or straight edges with larger widths can be smoothly enclosed and overlapped; the left and right supporting curved surfaces of the mold body (its side mold part) can better cooperate with and support the paper piece to be embraced, and it is not easy to produce obvious edges, creases and scratches on the barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following describes the relevant details and working principles of the implementation methods and embodiments of the present invention in conjunction with the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the top structure of the utility model.

[0016] Figure 2 for Figure 1 Stereoscopic image.

[0017] Figure 3 for Figure 2 Schematic diagram of the structure in which one side mold is in a separated state

[0018] Figure 4 for Figure 2 Schematic diagram of the structure from another angle.

[0019] In the figure: 1, mold body; 13, center mold; 14, side mold;

[0020] 100, barrel support surface;

[0021] 131, support plane;

[0022] 141, support surface; 145, inner side;

[0023] 1411, arc surface;

[0024] 1412. Inward-contracted arc transition surface; 1413. Transition connection curved surface. DETAILED DESCRIPTION

[0025] 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 of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Referring to the accompanying drawings, in an example of this embodiment, a smoothly enclosed and overlapped barrel forming mold includes a mold body 1, and the mold body 1 includes a center mold 13 and a side mold 14. The upper and lower sides of the center mold 13 respectively have support planes 131, and the side molds 14 are located on the left and right side surfaces 133 of the center mold 13, wherein the outer side surface of the side mold 14 has a supporting curved surface 141, and the supporting plane 131 and the supporting curved surface 141 cooperate and connect to form a barrel support surface 100. The barrel support surface 100 is used to support the paper sheet for enclosing. When used for forming paper cups, paper bowls, or outer sleeves (such as cup sleeves, etc.), the paper sheet will rely on the barrel support surface 100 of the mold body 1 to enclose and form the barrel; wherein the supporting curved surface 141 includes an arc surface 1411, the upper end of the supporting curved surface 141 is connected to the upper support plane 131, and the lower end of the supporting curved surface 141 is connected to the lower support plane 131.

[0027] In the barrel forming mold that is smoothly enclosed and overlapped, 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, and is conducive to the overlapping connection of the oblique edges or straight edges with larger widths, ensuring that the die head is lowered and pressed on the mold body 1 to cooperate and connect the overlapping edges at the enclosed part of the barrel, so that the oblique edges or straight edges with larger widths 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 and support the paper piece to be embraced, and it is not easy to produce obvious edges, creases and scratches on the barrel.

[0028] The following optimization or further explanation may be performed based on the above embodiments.

[0029] For example, the support curved surface 141 and the support flat surface 131 can be smoothly connected (e.g., tangentially connected) by polishing the connection between the support curved surface 141 and the support flat surface 131 to create a smooth transition. This allows the paper to be less likely to be indented when it is enclosed on the mold body 1 (its body support surface 100) to form the body. The side molds 14 and the center mold 13 can be assembled separately. For example, the side molds 14 can be attached to the left and right side surfaces 133 of the center mold 13 using fasteners or other means. Alternatively, a one-piece structure is possible.

[0030] The supporting curved surface 141 may adopt the following embodiments:

[0031] In the first embodiment, the arc surface 1411 adopts a semi-circular arc surface 1411, and the arc surface 1411 is tangent to the support 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 support plane 131 to achieve a smooth connection, and the side mold 14 is relatively easy to process.

[0032] In the second embodiment, the arc surface 1411 adopts a minor arc surface, and the supporting curved surface 141 further includes a transition connecting curved surface 1413, and the upper and lower ends of the minor 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 minor arc surface and transition connecting curved surfaces 1413 at its upper and lower ends, and the transition connecting curved surface 1413 cooperates to smoothly connect the minor arc surface with the supporting plane 131; in this structure, when the tube body is made of paper pieces of the same specification, compared with the embodiment 1 (the supporting curved surface of the side mold 14 As for the supporting curved surface 141 (direct arc surface 1411 adopts semi-circular arc surface 1411), the thickness (upper and lower dimensions) of the central mold 13 in the second embodiment can be relatively large, and while meeting 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 arc surfaces and are connected by transition connecting curved surfaces 1413, which can make the thickness of the central 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 Example 2, the thickness of the center mold 13 becomes larger, and compared with the thin center mold 13, it is also suitable for making tube bodies of the same specifications (circumference) with paper sheets of the same specifications. The center mold 13 has a larger thickness and relatively stronger strength for support, and can better withstand the impact of the cup clamp structure, ultrasonic devices, etc., and meet the needs 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 up water channels for 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, its supporting plane 131 can also have sufficient width to meet the requirements of smooth enclosed overlap of oblique edges or straight edges with larger widths, 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 (that is, 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 forming molds produced in the same batch are consistent. The upper and lower ends of the inferior arc surface are respectively connected to the support plane 131 through the inward-retracted arc transition surface 1412; the two ends of the inward-retracted arc transition surface 1412 are respectively tangentially connected to the inferior arc surface and the support plane 131.

[0033] Furthermore, the support plane 131 is horizontal and relatively symmetrical in its vertical direction. When the side molds 14 and center mold 13 are assembled separately, the left and right side surfaces 133 of the center mold 13 are symmetrical. The left and right sides of the support plane 131 are isosceles, with an isosceles triangle or trapezoidal support area between them. This creates a relatively rational structure and facilitates fabrication. The inner sides 145 of the side molds 14 and the left and right side surfaces 133 of the center mold 13 are flat, making fabrication easier and assembly more convenient, ensuring a stable, close-fitting structure.

Claims

1. A barrel forming mold for smoothly enclosing overlapping parts, comprising a mold body (1), characterized in that: The mold body (1) includes a center mold (13) and side molds (14), and the side molds (14) are located on the left and right sides (133) of the center mold (13). The upper and lower sides of the center mold (13) respectively have support planes (131). The outer side surface of the side mold (14) has a supporting curved surface (141). The support plane (131) and the support curved surface (141) cooperate and connect to form a barrel support surface (100); 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). The lower end of the supporting curved surface (141) is connected to the lower supporting plane (131).

2. The barrel forming die with smooth enclosed overlap according to claim 1, characterized in that: The supporting curved surface (141) and the supporting plane (131) are smoothly connected.

3. The barrel forming die with smooth enclosed overlap according to claim 1 or 2, characterized in that: The arc surface (1411) is a semi-circular arc surface (1411), and the arc surface (1411) is tangentially connected to the supporting plane (131).

4. The barrel forming die with smooth enclosed overlap according to claim 1 or 2, characterized in that: The arc surface (1411) adopts an inferior arc surface.

5. The barrel forming die with smooth enclosed overlap according to claim 4, characterized in that: The supporting curved surface (141) further includes an inward-contracted arc transition surface (1412), and the upper and lower ends of the inferior arc surface are connected to the supporting plane (131) through the inward-contracted arc transition surface (1412); the two ends of the inward-contracted arc transition surface (1412) are tangentially connected to the inferior arc surface and the supporting plane (131).

6. The barrel forming die with smooth enclosed overlap according to claim 4, 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).

7. The barrel forming die with smooth enclosed overlap according to claim 1, characterized in that: The supporting plane (131) is set as a horizontal plane, and the supporting 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.

8. The barrel forming die with smooth enclosed overlap according to claim 1, characterized in that: The side molds (14) are installed and connected to the left and right side surfaces (133) of the center mold (13).

9. The barrel forming die with smooth enclosed overlap according to claim 1, characterized in that: The left and right sides of the support plane (131) are isosceles, and an isosceles triangle support area or an isosceles trapezoid support area is formed between the left and right sides of the support plane (131).

10. The barrel forming die with smooth enclosed overlap according to claim 8, characterized in that: 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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