FI76307C - HYLSBEHANDLINGFOERFARANDE. - Google Patents

Description

76307

Hylsynkäsittelymenetelmä

The invention relates to a core treatment method in which cores of a certain size are cut from a long core bar. The invention can be used in particular when the sleeves are intended to be threaded on the same shaft and are wrapped in a roll-like material which is cut from a wider roll by splitting.

In industry, especially in the papermaking industry, narrower strips of track-like material are often cut by wrapping the cut strips in rolls on cores placed on the same axis. Sleeves of the required length are usually cut from long bars, for example 3 m long. The so-called sleeves used are so-called so-called paper made by helically gluing. thread-15 cores.

The cut sleeves are placed on the wrapping shaft of the cutter, usually by hand, by threading, which is quite laborious and slow.

The main object of the present invention is to facilitate the cutting and threading of the sleeves described above.

In the method according to the invention, the sleeves are formed from the sleeve rod by cutting. To do this, a mandrel is placed inside the rod, against which the sleeves of the desired length are cut from the rod. At the same time, the mandrel acts as a collector of cores. 25 When the desired number of cores have been cut, they are glued together. In this way, a row of cores is conveniently handled as a single unit, which can be pushed in a single movement onto the axis of the splitting cutter. The adhesive tapes connecting the cores of the splitting work again are cut when the rolls are disassembled.

When the entire sleeve rod is cut, most of the time a short piece is left. In the method according to the invention, it does not have to be thrown into a wreck, but the additional piece required from the next bar can be cut as a continuation. The adhesive tape 35 holds the parts of the sleeve together.

One or more adhesive tapes can be used to join the sleeves. They can be placed parallel to or around the core rows. Each cut seam can also be --— - - 1 :.

2 76307 connects the seam with a wrap around it.

The best adhesive tape is double-sided adhesive tape, the other adhesive surface of which is covered with release paper. When the release paper is removed from the finished row of cores, the front end of the material to be rolled into 5 rolls can be attached to the cores without separate gluing work.

The apparatus according to the invention comprises a mandrel, a sleeve-rod feed apparatus, a cutting member and an adhesive tape device for joining the cut sleeves into a row of sleeves.

The core row according to the invention consists of a plurality of defined cores, which are connected to each other end-to-end as a core row.

Some embodiments of the invention are described in more detail below. The accompanying drawing 15 schematically shows a method and apparatus used therein.

In the method according to the drawing, a core rod 1 made of paper by helically gluing (which is strongly shortened in relation to its diameter in the drawing) is guided to the feed table 2 of a cutting machine 20, from where it is fed the desired distance to the mandrel 10. The mandrel forms the shear resistance. Around the mandrel there is a corresponding longitudinally sliding stop 8 at the end of the sleeve rod, by means of which the sleeve rod is stopped at the desired position with respect to the cutting member. After the first sleeve 11 has been cut, the sleeve rod is moved forward and the next sleeve, etc., is cut until the desired number of sleeves has accumulated on the mandrel. The cores to be collected for the mandrel are connected by one or more longitudinal adhesive tapes 7, 30 of the core row, which are pulled into place by means of the adhesive tape feeding devices 6. The cores cut by the adhesive tapes form an assembly of the desired length which is easy to handle, for example by pushing the cutter into the wrapping axis of the cutter in one go. 35 The adhesive tape 7 is structured in such a way that its adhesive tape is formed by a thin film 12 (or adhesive-only film) a strong adhesive is loosely attached to the second adhesive surface. 3 76307 release paper 9. Once the core row has been pushed into place on the cutter shaft, remove the release paper from the top of the adhesive film. In this way, the sleeves have to hold the adhesive surface in order to attach the initial end of the material to be split, 5 and the cutter no longer requires a slow and cumbersome application of the adhesive. After the splitting work, the thin adhesive film connecting the cores is automatically broken when the split rolls are unloaded from the wrapping shaft.

When the last full-length sleeve 13 is cut from the sleeve rod 1, the undersized end piece 4 is usually left. However, this is not thrown into the wreck, but the next sleeve rod is fed as a continuation, from which the starter 14 required for a full-length sleeve is cut. Thus, 15 butt seams 3 remain between the pieces. However, the adhesive tape 7 holds the pieces together.

According to one embodiment, the adhesive tape is wound around each cutting point.

The cutting member may also have separate blades for each cut, in which case the entire row of cores is cut in one 20 times, and the taping is performed in a second step.

If desired, one-sided adhesive tape can be used for taping, in which case the end of the material to be rolled must be attached to the core in the usual manner by separate gluing.

Naturally, the different cores in the core row can be cut to 25 different lengths if required.

Claims (9)

76307 A sleeve treatment method in which a sleeve rod (1) is placed on a mandrel (10) and sleeves (11/13) of a desired length are cut from the sleeve rod, which are then removed from the mandrel 5, characterized in that a desired number of sleeves are collected on the mandrel. , which is then removed from the mandrel as a whole. · Method according to claim 1, characterized in that if in addition to the last 10 full-length sleeves (13) cut from the first sleeve rod additional sleeves are needed to form the desired row of sleeves and if an incomplete end piece (4) is left at the end of the first sleeve rod, a second sleeve rod is inserted into the mandrel truncating at its beginning the initial section 15 (14), which together with the end section forms a full-length core thereof. Method according to Claim 1 or 2, characterized in that the cores are connected in a row of cores by one or more adhesive tapes 20 (7) parallel to the row of cores. Method according to Claim 3, characterized in that the sleeves are connected by three adhesive tapes (7). Method according to Claim 1 or 2, characterized in that the sleeves are connected in a row of sleeves 25 by wrapping an adhesive tape around each seam point between the sleeves. Method according to one of Claims 1 to 5, characterized in that the sleeves are connected in a row of sleeves with a double-sided adhesive tape (7). Method according to Claim 6, characterized in that the sleeves are connected by a double-sided adhesive tape (7) with a release paper (9) on the upper side. Method according to one of the preceding claims, characterized in that the sleeves are cut from the sleeve rod 35 one by one. An apparatus for cutting cores from a core bar, the apparatus comprising a mandrel (10) that fits inside the core bar, a feed device (2) for placing the core bar on a mandrel 5 76307 and a cutting member (5) for cutting cores of a desired length from the core bar to the mandrel, further comprising an adhesive for connecting the cores cut to the mandrel into a row of cores 5 with adhesive tape (7).