JPS6078731A - Manufacture of core material by corrugated board sheet core - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing corrugated sheet cores.

The purpose of this invention is to mold a j-shaped core to
The object of the present invention is to provide a core material that does not recover from stress when stretched.

The purpose of this invention is to facilitate mechanical production and reduce production costs. The purpose of the furnace is to obtain a core material with excellent resistance to l:E. As a method for manufacturing this type of core material, there is a method described in Japanese Patent Publication No. Shozaoto-3/2Sg and Publication No. Shoto-209za7. In the former method, the core material is manufactured using a corrugated sheet, but V-shaped grooves are provided on both sides of the corrugated sheet so that the corrugated sheets can be bent in different IC directions. It is technically difficult to perform the same process in the same process except for forming grooves in different directions in 1811, and it cannot be carried out due to the danger, and the method is not disclosed in the same publication.

It is also possible to create grooves on each side of the corrugated cardboard sheet in two separate processes, but since it is a two-step process, it not only has the drawback of increasing the number of processes, but also the corrugated cardboard sheet with grooves formed on one side in advance. If a plate is mechanically provided again on the curved side of the plate, there is a problem that the pressing process may not be sufficient, and the groove may not be formed sufficiently. Therefore, the former four connections can be carried out by manually providing VCL:JJ grooves on both sides of the corrugated pole sheet, but there is a problem with doing it mechanically.

In the latter case, folds at perforations can satisfy thin paper items such as craft sheets, but it cannot be applied to corrugated cardboard sheets as in the present invention. Even if a min d is formed, it will not become bendable, and as a result, a core material that can be expanded and contracted will not be obtained.

This invention has been improved in view of the drawbacks of the conventional art, and is a fundamental or subsequent development thereof.

A T71 groove is formed on one side of the corrugated pole sheet, and many 11 and 14 slots are formed. A large number of discontinuous cuts are made at regular intervals between the kerf and the flat surface, and between the thin kerf holes there remains a connecting part that is 1 J-h shorter than the width of the kerf hole. A large number of core sheets with cut holes alternately cut with IJJ grooves and IC shapes are provided, and a band-like glue margin is formed on one side of the cut grooves or discontinuous cut holes of these sheets. This is a method in which two core sheets are arranged so that the glue margins overlap each other. .

The details of this invention will be explained below with reference to the accompanying drawings. As shown in Figure 1, the tape l'/';iiH<its height H2
One temporary cutter 3 is provided with a height H2 that is slightly lower than the thickness of the corrugated pole sheet 2. This is to provide a cut groove l shallower than the thickness H/thickness of the three-piece corrugated cardboard cutter. On the other hand, on the table J:, adjacent to the aforementioned cutter 3, there is provided another cutter S having an elongated capacity of a saw lII. A large number of concave portions a and convex portions of the knife S are alternately placed, and the height H3 thereof is slightly higher than the thickness H/ of the corrugated board sheet 2. These one cutter 3 and the other cutter 5 are alternately arranged in a row on the tape /I//.

The convex portion of the concave portion 5a and the convex portion 5b of the cutter S, tb versus l
- It is necessary to shorten the length of the recess ta, and the recess 5a
If the quality is /, mm, the length of the convex portion 5b is 3 to 17 mm.
Approximately Inm is appropriate. As will be described later, when making a perforation in the corrugated pole sheet 2 with this cutter S, if the strength of the recess ta is larger than the length of the convex part Sb, the sheet 2 cannot be bent completely and the convex part cannot be bent. If the length of the recess 5b is significantly larger than the recess 17, the unbent sheet will separate. Therefore, as shown in ml, it is preferable that the length of the concave part and the quality of the convex part be within /: 3. Now, as shown in Fig. Sheet 2 is in contact with each other, and is pressed from the top of the stage through the rollers? , cut grooves lt in the corrugated pole sheet 2 through one cutter 3
Ni-Nige kerf is a fib formed on one side of the cardboard.
A corrugated pole sheet is provided on the other 1011 surfaces without penetrating the 1st surface. Then, the corrugated board/
VV-, ), a large number of kerf holes 7 which are parallel to the kerf t of 2 and τC and which are thin and thin without any doubt are formed at regular intervals (C), and 12J holes 7 are formed in 7 kerfs. The shorter length of the connecting part g is tied to the corrugated pole sheet, !, and the unlucky read cut hole 9 is made. The shape 2 corresponds to the length of the convex portion a and the convex portion 5b. In other words, if the section of the convex part Sb of the knife S is 3 mm, a 3 mm cut hole 7 will be formed J''1., and the deflection of the fourth part 5a is /3 mm f Now, a connecting part groove of 15 m111 will be formed. This means that the convex part a of the knife S
When the inner surface of ri C75 hits the connecting part g of the corrugated board sheet 2, it will hit the connecting part g and a +10 will be formed on the back side of the GITCO, so the corrugated pole sheet 2 will be connected with the discontinuous cut as the border. It can be easily mixed into Tone Sushi/Olll+ (see the figure below). In this way, a large number of the grooves 1 and the perforated perforations are formed in parallel and alternately on the corrugated pole sheet, thereby providing a large number of core sheets. Naokiri@g
If a perforation is provided in the corrugated board IVV-toco, it is not shown in the illustration, but by providing it in a direction perpendicular to one direction of the liner of the corrugated board/115/-2, the liner will be vertically aligned during use. Therefore, there is an advantage that the core material can have even more anti-pressure properties. As you can see, a glue margin /2 is formed in a band shape on one side of the surface of the multiple discontinuous perforations of the @/th core sheet//a, and agent Ia is applied to the glue margin saw. Then, connect the multiple ψ grooves l of the second core sheet //b to the glue margin /
Shift the position by the width of 2 - (111 and parallel to the second core sheet//'b and place the adhesive portion 12 of the B/th core sheet//a on the back side of the B/th core sheet//a. Now, in the third sheet below, form the glue margin /3 into a belt shape, and also form the glue margin t7.
3, apply Ff2Ye agent to the first core sheet/
/d many kerfs l @3rd core sheet//C
Shift the position to the other side and parallel to the discontinuous cut hole by the width of glue allowance /3 and insert the fourth core sheet //
(Third core sheet on the back of L) //Glue allowance for C/
Arrive at the 3rd floor.

Therefore, on one side of the cut groove l on the 6th side of the fourth core sheet //d, which is adhered to the glue margin /3 of the third core sheet //C, there is a glue margin /4. will be formed in a band shape.

The adhesion of the core sheet to the following is carried out by repeating the steps in m. In this example, there is a glue allowance on one side and the other side of the discontinuous cut hole.
In the example where 2 and /3 are provided, it is shown as a cut/yi
! It is free to provide glue margins on one side of g and the oil side and adhere them. In other words, it is the same as when the kerf l and the discontinuous notch are replaced in the drawing. Note that this invention can also be applied to thick cardboard instead of corrugated V-HC.

Since this invention has the above configuration, it has the following advantages.

Conventionally, the manufacturing process for this type of corrugation using corrugated board had to be done manually, making it difficult to produce mechanically, but this problem can be solved, improving productivity and reducing production costs. be able to. In addition, a core material that can be freely bent can be obtained using corrugated cardboard sheets or cardboard.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the state in which a cutter is attached to the tape μH, Fig. 2 is a schematic front view showing the process of making cut grooves and discontinuous cuts in a corrugated cardboard sheet, and Fig. 3 is a schematic front view showing the process of making cut grooves and discontinuous cuts in a corrugated cardboard sheet. 1pJ<< Figure is a schematic enlarged cross-sectional view showing the process of forming kerf grooves and discontinuous kerf holes with a cutter, and Figure 45 is the same as that in Figure 3. Enlarged plan view of the section, Figure 6 is Figure 6! Fig. 7 is a plan view of the core V-), Fig. g is a front explanatory view showing the procedure for adhering the core V- - It is a front view when viewed. (Explanation of symbols of main parts) /,,,,,Table 2, φ, 0-tier pole seat 31000. One knife +0. , , , kerf j, 0. ,,Other cutter, ta, , ,Concave portion tb, ,Convex portion 7, ,, Cut hole g, ,,,, Connecting portion 1030. Discontinuous cut//, 6. Core sheet/2. ,, , Glue section/30. ,, 〃 /I1. ,,,tt 11th Figure 2? jS4 figure

Claims (1)

[Scope of Claims] One blade of the plate (with its height H2) slightly lower than the table (the thickness H2 of the corrugated pole sheet)
3), a large number of concave portions (5a) and convex portions (5b) are provided alternately, and the height H3) is equal to the thickness H/ of the corrugated pole sheet.
) The other knife with a serrated elongated temporary blade slightly higher than (a)
Alternately set up a large number of rows of these double-edged tools (3) and (a) in parallel with each other, and immediately place a cardboard μ sorto in the direction of the pieces placed on these double-edged tools (3) and (a). Then, by pressing down on the corrugated pole sheet, make a cut groove [ψ] in the corrugated pole sheet ■ through one cutter (5), and cut a cut groove (parallel to A large number of elongated wJ holes 1'71 are formed at regular intervals so as to be clearly adjacent to each other, and a connecting chain with a length shorter than the length of the notch is formed between each notch. Make sure to provide discontinuous cut holes (ri), and provide core sheets (//) by forming a large number of these cut grooves (b) and discontinuous cut holes θ) in parallel and alternately on all stages of the pole sheet. 1st core sheet) (//a)
(9) or the discontinuous notch (9), the adhesive portion is shaped hZ on the minus side of the notch (ψ or the discontinuous notch (9)), and Full application of adhesive to the glue margin 1-1 Out of the multiple grooves or discontinuous cuts on the second core sheet, remove the I7J groove or discontinuous cut. 17J on the glue side
Shift the position parallel to the groove or discontinuous cut hole by the width of the adhesive part to one side or -) and place it on the back side of the second core sheet. Then, in the same way, attach each of the third and higher core sheets to the adhesive part of the lower core notebook to form a multilayer core sheet. A method for producing a core material using a corrugated pole sorting core that suppresses a sheet for the core.