Paper tube with lead self-sealing concave bottom forming mold

Abstract

The invention discloses a paper tube with a lead self-sealing concave bottom forming mold, which has a lead self-sealing convex bottom outer mold, a self-sealing concave bottom outer mold and a self-sealing concave bottom inner mold: the lead self-sealing convex bottom outer mold has an inner hole, at least two forming blocks are arranged on the inner hole wall, the forming blocks have a front, a forming surface and a back, each forming surface is located on a convex curve inner rotating surface coaxial with the inner hole, and the top of the convex curve inner rotating surface has a center hole; the self-sealing concave bottom outer mold has an inner hole, a boss is arranged on the bottom surface of the inner hole, a circular hole is arranged on the end surface of the boss, at least two auxiliary forming blocks are arranged between the side surface of the boss and the inner circumference of the inner hole, the self-sealing concave bottom inner mold has a sliding column, the sliding column is inserted into the hole of the outer rod, the pin is fixed in the sliding column through the long groove on the circumferential surface of the outer rod, a compression spring is arranged between the bottom surface of the hole of the outer rod and the inner end of the sliding column, and a flange is arranged on the circumferential surface of the outer rod. The advantages of the invention are that the mold structure is simple and reliable, and the paper tube with a lead self-sealing concave bottom can be manufactured at one time.

Description

Technical Field

[0001] The invention relates to a firework paper tube forming mould, in particular to a paper tube with a lead and a self-sealing concave bottom forming mould. Background Art

[0002] In the production of fireworks, there are several processes that first use mud or paper to seal one end of the paper tube as the bottom of the paper tube, then insert the fuse, and then fix the fuse with a fixing agent. After the fixing agent dries, the next process can be entered. The operation is cumbersome, time-consuming and labor-intensive, with low production efficiency and difficult to guarantee product quality. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the invention provides a paper tube with a lead self-sealing concave bottom forming mold.

[0004] The present invention adopts the following technical scheme.

[0005] A paper tube with a lead self-sealing concave bottom forming mold, comprising a lead self-sealing convex bottom outer mold, a self-sealing concave bottom outer mold and a self-sealing concave bottom inner mold:

[0006] The self-sealing convex bottom outer mold with lead wire has an inner hole, and at least two forming blocks are arranged on the inner hole wall. The forming blocks have a front, a forming surface and a rear surface. Each forming surface is located on a convex curve inner rotation surface coaxial with the inner hole. One edge of the front coincides with one edge of the forming surface, and one edge of the rear coincides with another edge of the forming surface. The other edges of the front and the rear are on the inner hole wall. The top of the convex curve inner rotation surface has a central hole.

[0007] The self-sealing concave bottom outer mold has an inner hole, a boss is provided on the bottom surface of the inner hole, a circular hole is provided on the end surface of the boss, at least two auxiliary forming blocks are provided between the side surface of the boss and the inner peripheral surface of the inner hole, the auxiliary forming blocks have a front auxiliary surface and a rear auxiliary surface, and the intersection line of the front auxiliary surface and the rear auxiliary surface is an auxiliary forming edge;

[0008] The self-sealing concave bottom inner mold has a sliding column, which is inserted into the hole of the outer rod. The pin passes through the long groove on the circumferential surface of the outer rod and is fixed in the sliding column. A compression spring is arranged between the bottom surface of the hole of the outer rod and the inner end of the sliding column, and a flange is arranged on the circumferential surface of the outer rod.

[0009] The inner rotating surface of the convex curve is an inner conical surface.

[0010] The auxiliary forming edge has an arc segment or a straight line segment.

[0011] Compared with the prior art, the invention has the advantages that the mold structure is simple and reliable, and the paper tube with a lead-wire self-sealing concave bottom can be manufactured at one time, which simplifies the process, greatly improves the production efficiency, and ensures the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1It is a schematic structural diagram of a self-sealing cone bottom outer mold with leads according to an embodiment of the present invention.

[0013] Figure 2 for Figure 1 AA section view of the structure.

[0014] Figure 3 It is a structural schematic diagram of the self-sealing concave bottom outer mold.

[0015] Figure 4 for Figure 3 BB cross-section view.

[0016] Figure 5 for Figure 3 Cross-sectional view of CC rotated and unfolded.

[0017] Figure 6 It is a structural schematic diagram of the self-sealing concave bottom inner mold.

[0018] Figure 7 It is a structural schematic diagram of a self-sealing cone bottom outer mold with a lead wire and a formed paper tube with a cone bottom with a lead wire.

[0019] Figure 8 This is a schematic diagram of the structure of a paper tube produced by a paper tube with lead self-sealing concave bottom forming mold. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] like Figure 1-6 As shown, a paper tube with a lead self-sealing concave bottom forming mold comprises a self-sealing cone bottom outer mold with a lead, a self-sealing concave bottom outer mold and a self-sealing concave bottom inner mold:

[0022] The self-sealing conical bottom outer mold with lead wires has an inner hole 5, and there are 4 forming blocks on the wall of the inner hole 5. The forming blocks have a front face 1, a forming surface 3 and a rear face 4. Each forming surface 3 is located on an inner conical surface coaxial with the inner hole. One edge of the front face 1 coincides with one edge of the forming surface 3, and one edge of the rear face 4 coincides with another edge of the forming surface 3. The other edges of the front face 1 and the rear face 4 are on the wall of the inner hole 5, and there is a center hole 2 at the top of the inner conical surface.

[0023] The self-sealing concave bottom outer mold has an inner hole 8, a boss 7 is provided on the bottom surface of the inner hole 8, the end surface of the boss 7 is a plane, the end surface of the boss 7 has a circular hole 6, and three auxiliary molding blocks are arranged between the side surface of the boss 7 and the inner circumferential surface of the inner hole 8. The auxiliary molding blocks have a front auxiliary surface 9 and a rear auxiliary surface 10, and the intersection line of the front auxiliary surface 9 and the rear auxiliary surface 10 is an auxiliary molding edge 11, and the auxiliary molding edge 11 is a circular arc.

[0024] The self-sealing concave bottom inner mold has a slide column 18, which is inserted into the hole of the outer rod 13. The pin 16 passes through the long groove 15 on the circumferential surface of the outer rod 13 and is fixed in the slide column 18. There is a compression spring 14 between the bottom of the hole of the outer rod 13 and the inner end of the slide column 18, and there is a flange 12 on the circumferential surface of the outer rod 13.

[0025] The paper tube with lead self-sealing concave bottom forming mold works like this: first Figure 7 As shown, the lead wire 20 is inserted into the center hole 2 of the self-sealing conical bottom outer mold with lead wire, and the self-sealing conical bottom outer mold with lead wire is put on one end of the paper tube body 19 that has been fixed and opened at both ends, and the body 19 is rotated and extruded, so that a part of the original body is deformed and folded in a rotation direction to become the conical bottom 21 with lead wire, and the lead wire 20 is deformed, folded, extruded and fixed by the paper of the conical bottom 21 in a rotation direction. Then the self-sealing concave bottom inner mold is put into the paper tube with the conical bottom 21 with lead wire, and the concave bottom 21 with lead wire is rotated and extruded into the concave bottom 22 with lead wire (as shown in FIG. 1 ). Figure 8 as shown).

Claims

1. A paper tube with lead wire self-sealing concave bottom forming mold, Features There are self-sealing convex bottom outer mold with lead, self-sealing concave bottom outer mold and self-sealing concave bottom inner mold: The self-sealing convex bottom outer mold with lead wires has an inner hole A (5), and at least two molding blocks are arranged on the wall of the inner hole A (5), and the molding blocks have a front face (1), a molding surface (3) and a rear face (4), and each molding surface (3) is located on an inner conical surface coaxial with the inner hole, and one edge of the front face (1) coincides with one edge of the molding surface (3), and one edge of the rear face (4) coincides with another edge of the molding surface (3), and the other edges of the front face (1) and the rear face (4) are on the wall of the inner hole A (5), and the top of the inner conical surface has a central hole (2); The self-sealing concave bottom outer mold has an inner hole B (8), the bottom surface of the inner hole B (8) has a boss (7), the end surface of the boss (7) has a circular hole (6), at least two auxiliary molding blocks are arranged between the side surface of the boss (7) and the inner peripheral surface of the inner hole B (8), the auxiliary molding blocks have a front auxiliary surface (9) and a rear auxiliary surface (10), the intersection line of the front auxiliary surface (9) and the rear auxiliary surface (10) is an auxiliary molding edge (11), and the auxiliary molding edge (11) is a circular arc segment; The self-sealing concave bottom inner mold has a slide column (18), which is inserted into the hole of the outer rod (13). The pin (16) passes through the long groove (15) on the circumferential surface of the outer rod (13) and is fixed in the slide column (18). A compression spring (14) is provided between the bottom surface of the hole of the outer rod (13) and the inner end of the slide column (18), and a flange (12) is provided on the circumferential surface of the outer rod (13).

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