KR101217771B1 - Manufacturing method of bale wrapper roller and bale wrapper roller - Google Patents

Abstract

PURPOSE: A manufacturing method of a veil winding roller is provided to enhance productivity thereby securing a competitive pricing by cutting down the cyclic time and improve the precision measurement in order to improve quality. CONSTITUTION: A manufacturing method of a veil winding roller comprises the following steps. An under body injection molding step(S1) for forming an under body collapsing unit between the inner wall of an under body and the outer wall of an under body; an upper body injection molding step(S2) for forming an upper body collapsing unit between the inner wall of an upper body and the outer wall of an upper body; a combining step(S3) for forming a sealed space by connecting the under body collapsing unit and the upper body collapsing unit thereby forming a core by welding the under body and the upper body; and a cell molding step(S4) for inserting the core and forming cell winding the surface of the core by injection molding.

Description

Manufacturing method of roller for bale wrapper and roller for bale wrapper {MANUFACTURING METHOD OF BALE WRAPPER ROLLER AND BALE WRAPPER ROLLER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bale wrapper for wrapping a bale, such as rice straw, harvested for feeding into a livestock feed, with a packaging material such as vinyl, and more particularly, a technique for manufacturing a roller used in a bale wrapper.

Since ancient times, rice straw has been used as livestock feed in winter, and recently, crops have been cultivated and supplied to livestock farms. On the other hand, animal feed has been used a lot to promote growth, but the cause of mad cow disease is found to be due to the abuse of such animal feed is increasing interest in vegetable feed.

Unlike the past, most livestock farms operate on a large scale, so it is important to secure an adequate amount of good quality feed. In particular, bales such as straw should be stored for a long time, so that freshness does not fall and there is a need to minimize the volume.

For this reason, a dedicated machine called a bale wrapper is used, and a "bale packing machine" of Korean Patent No. 10-1009041 (registered on Jan. 11, 2011) is known.

1 is a perspective view of the main portion of the bale packing machine, as shown in the bale packing machine main frame 110, the bale support unit 120, the bale packing unit 140, the bale standing means 150 is installed on the main frame ) And the film roll loading unit 160.

The bales stacked in a cylindrical shape are wrapped in a film by a bale packing machine, and in order to pack the bales, the bales must be supplied while the bale is rotated.

A number of rollers that are rotated are used to be able to rotate while supporting the bale, and the invention relates to such a roller.

Figure 2 is an illustration of the actual bale wrapper, it can be seen the roller for the bale wrapper paired left and right.

3 is a perspective view of a bale wrapper roller used in a conventional bale wrapper (or bale packing machine), and FIG. 4 is a cross-sectional view of the bale wrapper roller of FIG. 3. 5 is a cross-sectional view of a conventional bale wrapper roller actually manufactured.

Since the conventional bale wrapper roller is manufactured through the rotational molding, it is difficult to meet the dimensional tolerances on the design drawing, so the incidence of defective products is high, and in particular, there is a problem that the material is biased to one side due to the characteristics of the rotational molding.

Looking at the specific forming process of the roller for the bale wrapper by rotational molding as follows.

Raw material crushing step (10 minutes), raw material crushing step (10 minutes), JIG bonding step (5 minutes), raw material input step (5 minutes), mold preheating step (10 minutes), mold rotation step (10 Minutes), slow cooling step (60 minutes), take-out step (5 minutes), BUSH insertion step (1 minutes), BURR removal step (5 minutes) through the roller for the wrapper is produced.

However, the production method of the roller for the bale wrapper according to the existing method has a problem that the cycle time is about 2 hours, the productivity is reduced, and as mentioned earlier, the dimensional precision is deteriorated and the material is concentrated in some parts due to the characteristics of the rotational molding. .

1. Republic of Korea Patent No. 10-1009041 (2011.01.11 registration)

Therefore, the present invention is to provide a technique that can significantly reduce the cycle time according to the manufacture of the roller for the bale wrapper to increase the productivity and secure the price competitiveness, to achieve a quality improvement by increasing the dimensional accuracy.

The manufacturing method of the roller for a bale wrapper of this invention for achieving the above subject is manufacture of the bale wrapper roller which consists of the sealed space formed by the inner wall and the outer wall, and the inner wall center part is formed in the up-and-down opening of the shaft. A method, comprising: a lower body molding step of injection molding such that a lower depression is formed between a lower inner wall and a lower outer wall; An upper body forming step of injection molding such that an upper depression is formed between the upper inner wall and the upper outer wall; A coupling step of coupling the lower body and the upper body so that the lower recess and the upper recess are connected to each other to form a sealed space, thereby forming a core; And a cell molding step of inserting the core and injection molding to form a cell surrounding the outer surface of the core.

And in the present invention, the coupling step is characterized in that the mutual coupling by friction heat by rotating any one of the lower body and the upper body in close contact with each other.

And in the present invention, each of the contact surface that the lower body and the upper body is in close contact with each other, it is characterized in that the coaxial alignment is aligned with each other in the shape of male and female.

And in the present invention, the injection molding of the lower body and the upper body is a high density injection molding, the injection molding of the cell is characterized in that the relatively low density injection molding.

The present invention also relates to a roller for a bale wrapper made by the manufacturing method as described above.

The production method of the bale wrapper roller according to the present invention can increase the productivity by reducing the cycle time, it is possible to provide a high quality bale wrapper roller, there is an effect that it is possible to secure the price competitiveness through cost reduction.

1 is a perspective view of the main portion of the bale packing machine according to the prior art.
2 is an illustration of an actual bale wrapper.
3 is a perspective view of a roller for a bale wrapper used in a conventional bale wrapper (or bale packing machine).
4 is a cross-sectional view of the roller for a veil wrapper in FIG. 3.
Figure 5 is a cross-sectional view of the conventional bale wrapper roller actually manufactured.
Figure 6 is a work flow chart for the manufacturing method of the roller for the bale wrapper according to an embodiment of the present invention.
7 is a sectional view of the lower body;
8 is a cross-sectional view of the upper body;
Figure 9 is a cross-sectional view showing a state in which the upper body and the lower body is coupled to each other through rotational fusion.
10 is a cross-sectional view of the completed bale wrapper roller.
11 is a conceptual diagram for a fusion unit is a rotational fusion.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention in the drawings, portions not related to the description are omitted, and like reference numerals are given to similar portions throughout the specification.

Whenever a component is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements, not the exclusion of any other element, unless the context clearly dictates otherwise.

6 is a working flow chart illustrating a manufacturing method of a roller for a bale wrapper according to an exemplary embodiment of the present invention, FIG. 7 is a cross-sectional view of a lower body, and FIG. 8 is a cross-sectional view of an upper body. 9 is a cross-sectional view showing a state in which the upper body and the lower body are coupled to each other through rotational fusion, and FIG. 10 shows a cross-sectional view of the completed bale wrapper roller.

As shown in FIG. 10, the bale wrapper roller R according to the present invention is a cone-shaped roller having an upper and lower beam shape, and an airtight space P surrounded by an inner wall and an outer wall is formed, and an inner wall center is vertically opened. It becomes a shaft hole (H). The shaft hole H becomes a portion to which the shaft is fitted when the bale wrapper roller R is installed.

The manufacturing method of the bale wrapper roller according to an embodiment of the present invention is made through the following specific process, unlike the conventional rotational molding method.

The method for manufacturing a bale wrapper roller according to an embodiment of the present invention includes a lower body forming step (S1), an upper body forming step (S2), a bonding step (S3), and a cell forming step (S4).

In the lower body forming step (S1) and the upper body forming step (S2) is a process of molding the lower body 100 and the upper body 200 to be connected to each other by separate injection molding.

The lower body 100 is injection molded so that the lower depression 110 forming an empty space is formed by the lower inner wall W1a and the lower outer wall W2a, and the upper body 200 is the upper inner wall W1b and the upper outer wall. Injection molding is performed so that an upper recess 210 forming an empty space is formed by W2b.

The lower end of the lower body 100 is a lower inner wall (W1a) and the lower outer wall (W2a) is connected to each other becomes a concave lower depression 110, the upper end of the upper body 200 is the upper inner wall (W1b) and the upper outer wall ( W2b) are connected to each other to become the upper depression 210.

The lower body 100 and the upper body 200 formed by injection are in close contact with each other for the bonding step S3. That is, the lower recess 110 and the upper recess 210 are connected to each other to closely contact the upper end surface of the lower body 100 and the lower end surface of the upper body 200 to form one sealed space P.

When the lower body 100 and the upper body 200 are in close contact with each other, the lower inner wall W1a and the upper inner wall W1b are in close contact with each other to form a contact surface, and the lower outer wall W2a and the upper outer wall W2b are also in contact with each other. Close contact.

More preferably, the contact surfaces of the lower body 100 and the upper body 200 may be aligned coaxially with each other in a male and female form. That is, the contact surface of the lower body 100 has a protrusion 120 protruding in a circle, and the contact surface of the upper body 200 has a recessed groove 220 having a recessed shape while forming a circle in the lower body 100. And when the upper body 200 is in contact with the protrusion 120 and the protrusion groove 220 is meshed with each other to be exactly coaxially aligned.

Joining step (S3) is for the injection molded lower body 100 and the upper body 200 to be integrally combined to form a core 300, the lower body 100 and the upper body 200 is a predetermined It can also be connected to each other using a gluing agent.

In the embodiment of the present invention, the bonding step (S3) for making the core 300 is to combine the lower body 100 and the upper body 200 integrally without the use of adhesive through rotational fusion.

That is, the lower body 100 and the upper body 200 are rotated in any one of the lower body 100 or the upper body 200 in a state in which the lower body 100 is closely aligned with each other. When any one of the upper body 200 and the lower body 100 is rotated at a high speed in a state in which the contact surface of the upper body 200 and the lower body 100 are in close contact with each other, frictional heat is generated at the contact surface. The core 300 to which the upper body 200 and the lower body 100 are integrally coupled is formed by fusion at the contact surface due to frictional heat and a predetermined pressure.

Attached FIG. 11 is a conceptual diagram of a welding unit in which rotation welding is performed.

The fusion unit U includes a lower jig J1 for fixing the lower body 100 and an upper jig J2 for fixing the upper body 200, and the upper jig J2 is formed by the upper and lower cylinders C. Moving up and down, the upper jig (J2) is connected to the motor (M) to form a structure that can be rotated.

The lower body 100 is fixed using the fusion unit U as shown in FIG. 11, and the upper body 200 is brought into close contact with the lower body 100, and then the upper jig J2 is rotated. And the lower body 100 may be bonded to each other by heat and pressure at the contact surface.

The cell forming step S4 is followed by the joining step S3.

Cell forming step (S4) is to form a cell 400 surrounding the outer surface of the core 300 made by the coupling step (S3), the cell 400 is integrally coupled to the outer surface of the core 300 by the insert injection method Be sure to

That is, the inserted core 300 is inserted into a predetermined mold, and a material 400 which covers the outer surface of the core 300 is injected to form a cell 400 covering the core 300. By insert injection, the cell 400 covering the outer surface of the core 300 is formed, and thus, the lower body 100 and the upper body 200 which are fusion-bonded to each other are more firmly bonded and used for a precise bale wrapper without using a separate adhesive. Rollers can be produced.

In the manufacturing method of the bale wrapper roller according to the present invention, the injection molding of the lower body 100 and the upper body 200 constituting the core 300 is preferably a high density injection molding, Injection molding is regarded as relatively low density injection molding.

The core 300 needs to be somewhat harder than the cell 400, whereas the cell 400 is softer than the core 300, so it is suitable to have some cushion, so that the core 300 and the cell ( It is desirable to make a difference in the density of the material upon injection of 400).

As described above, the manufacturing method of the bale wrapper roller according to the present invention is sufficient to have a cycle time of about 5 minutes compared to the existing method and can be molded to precise dimensions because of the injection method, thereby securing price competitiveness through quality improvement. can do.

Another idea of the invention relates to a roller for a bale wrapper made through the manufacturing method as described above.

As already mentioned, the roller R for the bale wrapper according to the present invention is integrally formed with the lower body 100 forming the core 300 and the upper body 200 and the cell 400 covering the outer surface of the core 300. In a combined form.

In particular, the lower body 100 and the upper body 200 are manufactured by injection molding, respectively, and then bonded to each other at a predetermined pressure with heat generated by rotating the lower body 100 and the upper body 200 in close contact with each other. 300 will be formed.

By inserting the core 300 combined with the lower body 100 and the upper body 200, the cell 400 is injection molded to produce one bale wrapper roller R.

The roller for bale wrapper R according to the present invention is molded through double injection and rotational fusion, and thus has excellent dimensional accuracy and short cycle time, thereby significantly reducing manufacturing cost and improving quality, thereby improving price and product competitiveness. The advantage is that it can be improved.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be.

It is therefore to be understood that the embodiments described above are intended to be illustrative, but not limiting, in all respects. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

The manufacturing method of the roller for a bale wrapper by this invention can be used for manufacture of the roller used for a bale wrapper.

S1: lower body forming step S2: upper body forming step
S3: joining step S4: cell forming step
R: Bale Rapper Roller
P: Enclosed Space H: Shaft Hole
100: lower body 110: lower depression
120: protrusion 200: upper body
210: upper depression 220: projection groove
300: core 400: cell
W1: inner wall W1a: lower inner wall
W1b: upper inner wall W2: outer wall
W2a: Lower outer wall W2b: Upper outer wall
U: Fusion Unit J1: Lower Jig
J2: Upper jig C: Upper and lower cylinder
M: Motor

Claims (5)

In the manufacturing method of the roller for a bale wrapper which consists of an enclosed space enclosed by an inner wall and an outer wall, and the center hole of the said inner wall center is formed so that it may open up and down,
A lower body molding step of injection molding such that a lower depression is formed between the lower inner wall and the lower outer wall;
An upper body forming step of injection molding such that an upper depression is formed between the upper inner wall and the upper outer wall;
A coupling step of coupling the lower body and the upper body so that the lower recess and the upper recess are connected to each other to form a sealed space, thereby forming a core;
And inserting the core and inserting the core, thereby forming a cell surrounding the outer surface of the core, thereby forming a cell. 2. The method of claim 1,
The coupling step is a method of manufacturing a roller for a bale wrapper, characterized in that the mutual coupling by frictional heat by rotating any one of the lower body and the upper body in close contact with each other. The method of claim 2,
Each contact surface is in close contact with the lower body and the upper body,
A method for producing a roller for a veil wrapper, which is arranged coaxially with each other in a male and female form. The method of claim 1,
The injection molding of the lower body and the upper body is a high density injection molding, the injection molding of the cell is a manufacturing method of the roller for the bale wrapper, characterized in that made of a relatively low density injection molding. The roller for a bale wrapper made by the manufacturing method of any one of Claims 1-4.

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