CN107009683B

CN107009683B - Forming die for paper tube with hole bottom

Info

Publication number: CN107009683B
Application number: CN201710393839.XA
Authority: CN
Inventors: 冯建友; 李金亮; 毛明光; 郭辉
Original assignee: Hunan Xinpeng Environmental Protection Technology Co ltd
Current assignee: Hunan Xinpeng Environmental Protection Technology Co ltd
Priority date: 2017-05-28
Filing date: 2017-05-28
Publication date: 2023-06-02
Anticipated expiration: 2037-05-28
Also published as: CN107009683A

Abstract

The invention discloses a paper tube forming die with a hole bottom, which is provided with a forming seat and a compression bar; the inner peripheral surface of the forming seat is an inner cylindrical surface, a cylindrical mandrel is arranged on the axis of the bottom surface of the forming seat, a pit is arranged on the bottom surface around the mandrel, the pit is provided with a working surface and an auxiliary surface, the outermost edge of the auxiliary surface is intersected with the outermost edge of the working surface to form a paper tube forming line, or the outermost edge of the auxiliary surface and the outermost edge of the working surface are positioned on the same surface to form a paper tube forming surface, and the innermost edge of the auxiliary surface is overlapped with the innermost edge of the working surface; the pressure lever is a cylindrical rod, a hole is axially formed in the front end of the pressure lever, and a flange is arranged on the outer circumferential surface of the rear end of the pressure lever. Compared with the prior art, the invention has the advantages of simple structure, high reliability, simplified working procedures, reduced cost and improved quantity and quality of products.

Description

Forming die for paper tube with hole bottom

Technical Field

The invention relates to a paper product processing device, in particular to a paper tube forming die with a hole bottom.

Background

In daily life and in many production places, paper tubes with holes at the bottoms are needed, and the paper tubes with the holes at the bottoms are assembled by two parts of a tube body and the tube bottom with holes, so that the manufacturing process is complex and the cost is high. In firework production, one end of a paper tube is required to be sealed, only one hole is reserved, the traditional working procedure is commonly called as 'beating mud head', namely, soil is compacted at one end of the paper tube to form a mud layer for blocking and isolating, and then a fire passing hole is reserved. This practice requires a lot of soil, which damages the environment, and the soil pollutes the environment after the fireworks are set off. The manual 'mud beating head' has the advantages of high labor intensity, poor working environment and low production efficiency. The mechanical mud pressing head has large occupied area, complex structure and poor reliability. Recently, the mud head is replaced by a circular paper sheet, namely, the circular paper sheet with holes is punched first and then pressed into a paper tube. The method is time-consuming and labor-consuming in manual operation, high in mechanical cost, and low in sealing effect of the round paper sheet and the inner wall of the paper tube, and the quality of the product is affected.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the paper tube forming die with the hole bottom, which has the advantages of simple structure, low cost, safety and reliability.

The invention adopts the following technical scheme.

A paper tube forming die with a hole bottom comprises a forming seat and a pressing rod, wherein the inner circumferential surface of the forming seat is an inner cylindrical surface, a cylindrical mandrel is arranged on the axis of the bottom surface of the forming seat, 1 pit or 2 pits or 3 pits or 4 pits are arranged on the bottom surface around the mandrel, the pits are provided with a working surface and an auxiliary surface, the working surface is a plane, the auxiliary surface is a curved surface, the outermost edge of the auxiliary surface and the outermost edge of the working surface are positioned on the same plane to form a paper tube forming surface, the paper tube forming surface is a plane and perpendicular to the axis of the forming seat, the pressing rod is divided into a pressing rod head and a pressing rod body, the front end of the pressing rod head is axially provided with a hole, the tail part of the pressing rod head is slidably inserted into a long hole of the pressing rod body and is contacted with a pressure spring in the long hole, the pin is fixed on the pressing rod head through a groove of the pressing rod body, and the outer circumferential surface of the pressing rod body is provided with a flange, and the pits are provided with a hole and the outer circumferential surface of the forming seat.

The bottom surface of the forming seat surrounds the mandrel and has any one of the number of pits 5 to 20, each pit is provided with a working surface and an auxiliary surface, the working surface is a plane, the auxiliary surface is a curved surface, the outermost edge of the auxiliary surface and the outermost edge of the working surface are positioned on the same plane to form a paper tube forming surface, the paper tube forming surface is a plane and is perpendicular to the axis of the forming seat, and the innermost edge of the auxiliary surface is overlapped with the innermost edge of another adjacent working surface.

The intersection of the auxiliary surface and the inner cylindrical surface is an arc surface.

The front end of the compression bar is a plane.

Compared with the prior art, the invention has the advantages of simple structure, high reliability, simplified working procedures, reduced cost and improved quantity and quality of products.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic diagram of a cross-sectional view a-a in fig. 1.

Fig. 3 is a schematic cross-sectional view of B-B of fig. 1 taken along a cylindrical surface.

Fig. 4 is a schematic structural view of the compression bar.

Fig. 5 is a schematic structural diagram of embodiment 2 of the present invention.

Fig. 6 is a schematic diagram of a cross-sectional view C-C in fig. 5.

Fig. 7 is a schematic cross-sectional view of fig. 5D-D taken along the cylindrical surface.

Fig. 8 is a schematic structural diagram of embodiment 3 of the present invention.

Fig. 9 is a schematic diagram of a cross-sectional view E-E in fig. 8.

Fig. 10 is a schematic structural diagram of a compression bar according to embodiment 3.

Fig. 11 is a schematic structural view of embodiment 4 of the present invention.

Fig. 12 is a schematic diagram of a cross-sectional view F-F in fig. 11.

Fig. 13 is a schematic diagram of the structure of the compression bar of embodiment 4.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples.

Example 1 as shown in fig. 1-4, there is a molded seat and a plunger; the inner peripheral surface of the forming seat 5 is an inner cylindrical surface 1, a cylindrical mandrel 6 is arranged on the axis of the bottom surface of the forming

seat

5, 3 pits are arranged on the bottom surface around the mandrel 6, the pits are provided with a working surface 7 and an auxiliary surface 3, the outermost edge of the auxiliary surface 3 and the outermost edge of the working surface 7 are positioned on the same surface to form a paper tube forming surface 2, and the paper tube forming surface 2 is a plane and perpendicular to the axis of the forming seat 5. The innermost edge of the auxiliary surface 3 coincides with the innermost edge of another adjacent working surface. The working surface 7 is a plane and the auxiliary surface 3 is a curved surface. The intersection of the adjacent auxiliary surface 3b and the inner cylindrical surface 1 is an arc surface 4. The pit has a hole 8 communicating with the outer peripheral surface of the forming seat 5. The compression bar is divided into a compression bar head 9 and a compression bar body 16, the front end 17 of the compression bar head 9 is a plane, a hole 10 is axially formed in the front end 17 of the compression bar head 9, the tail of the compression bar head 9 is slidably inserted into a long hole 14 of the compression bar body 16 and is contacted with a pressure spring 13 in the long hole 14, a pin 11 is fixed on the compression bar head 9 through a groove 12 of the compression bar body 9, and a flange 15 is arranged on the outer circumferential surface of the compression bar body 16.

Embodiment 2 is shown in fig. 4 to 7, and differs from embodiment 1 in that the outermost edge of the auxiliary surface 20 intersects the outermost edge of the working surface 19 to form a paper tube forming line 18.

Embodiment 3 is different from embodiment 2 in that the paper tube forming line 21 is a curve protruding outward toward the forming seat 5, and the front end 22 of the presser head 23 is a curve protruding inward, as shown in fig. 10 to 11.

Embodiment 4 is different from embodiment 2 in that the paper tube forming line 24 is a curve protruding inward toward the forming seat 5, and the front end 25 of the presser head 26 is a curved surface protruding outward, as shown in fig. 12-13.

Claims

1. A paper tube forming die with a hole bottom is characterized by comprising a forming seat and a pressing rod, wherein the inner circumferential surface of the forming seat is an inner cylindrical surface, a cylindrical mandrel is arranged on the bottom surface axis of the forming seat, 1 pit or 2 pits or 3 pits or 4 pits are arranged on the bottom surface around the mandrel, the pits are provided with a working surface and an auxiliary surface, the working surface is a plane, the auxiliary surface is a curved surface, the outermost edge of the auxiliary surface and the outermost edge of the working surface are positioned on the same surface to form a paper tube forming surface, the paper tube forming surface is a plane and perpendicular to the axis of the forming seat, the pressing rod is divided into a pressing rod head and a pressing rod body, the front end of the pressing rod head is axially provided with a hole, the tail part of the pressing rod head is slidably inserted into a long hole of the pressing rod body and is contacted with a pressure spring in the long hole, the pin is fixed on the pressing rod head through a groove of the pressing rod body, the outer circumferential surface of the pressing rod body is provided with a flange, and the pits are provided with a hole and the outer circumferential surface of the pressing rod is communicated with the forming seat.

2. The forming die for a perforated bottom of a paper tube according to claim 1, wherein the number of pits on the bottom surface of the forming seat surrounding the mandrel is any one of 5 to 20, each pit has a working surface and an auxiliary surface, the working surface is a plane, the auxiliary surface is a curved surface, the outermost edge of the auxiliary surface and the outermost edge of the working surface are positioned on the same surface to form a forming surface of the paper tube, the forming surface of the paper tube is a plane and is perpendicular to the axis of the forming seat, and the innermost edge of the auxiliary surface coincides with the innermost edge of another adjacent working surface.

3. The paper tube bottom forming die with holes as claimed in claim 1, wherein the intersection of the auxiliary surface and the inner cylindrical surface is an arc surface.

4. The paper tube bottom forming die with holes according to claim 1, wherein the front end of the pressing rod is a plane.