JP3023623B2 - Molding method of non-woven seedling growing container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates, vegetables, flowers, seedlings, such as ornamental plants suitable for seedling cultivation of the plant of the non-woven fabric made of nursery container
On adult-type method.

[0002]

2. Description of the Related Art Conventionally, as a flower pot formed by three-dimensionally molding a nonwoven fabric, one disclosed in Japanese Utility Model Laid-Open No. 49-95134 is disclosed.
As a molding method, it is described that a sheet-like material of synthetic fiber, for example, a sheet-like nonwoven fabric is heated and pressed into a deep-drawing pot-like shape .

[0003] However, a sheet-like non-woven cloth in the prior art
More Doing deep drawing molding, such as flower pots, for elongation of the nonwoven fabric is small, not give sufficiently follow the tension due to the pressure of molding during the mold, or thinner too elongation bottom, wrinkles are generated on the side wall Partial double or triple overlap, uniform fiber density
Could not be molded. And fiber
In the case of flowerpots with uneven density, air permeability and water permeability are uneven.
The problem is that plant growth varies
there were.

[0004] In addition, a place where the seedlings of plants are grown using flower pots.
In general, a plastic container is used, in which recesses for loading flower pots are integrally formed in units of several tens.
There is a step on the side wall in the recess of such a container.
No When fitting a non-woven fabric made flower pots, containers and pots
Since the gap between the bottom portion is small, characterized der of nonwoven plants pot
Question that through care of, can not give full play to the function of water permeability
There was a title .

[0005]

SUMMARY OF THE INVENTION The present invention is based on the prior art.
Is intended to solve the problem, formed type time without causing wrinkles or overlapping portions on the side walls, no uneven thickness in the bottom, as a whole fiber density is uniform, and with a gap in the recess of container
Can be fitted , and fully exhibits the functions of breathability and water permeability
Provided is a method of molding a non-woven seedling container made of non-woven fabric.
Aims at that. To achieve this object, the present invention
Is a non-woven grown seedling having at least one horizontal step
A method for molding a container, comprising a natural fiber containing a thermoadhesive fiber.
Nonwoven fabric made of fiber, synthetic fiber or a mixture of these
At least one circumferential direction of the side wall.
It is the lower mold of one of a pair of molds with a step
After placing on the mold, the inner part and outer part
Divided into multiple parts or more and made each movable
Lower the other upper mold from the inner part,
From the bottom corresponding part to the step by step, and heat molding
It is characterized by the following.

[0006] As the fibers constituting the nonwoven Nunou E blanking or nonwoven Nunoma <br/> Tsu preparative used in the present invention, for example wool as a natural fiber, animal fiber and cotton alpaca such as hemp, Shiyuro, and vegetable fibers such as pineapple, polyester as chemical fibers,
One or more fibers selected from synthetic fibers such as polyamide-based, acrylic-based, modacrylic, polypropylene-based, polyethylene, polyvinyl chloride, vinylidene chloride-based, polyurethane-based, and polyvinyl alcohol-based fibers and regenerated fibers such as rayon and cupra ; As the heat-adhesive fiber, a mixture of low-melting polyester, low-melting polyamide, ethylene-vinyl acetate, polyamide-polyester, polyethylene-polypropylene composite fiber, or the like is used.

[0007] The mixing ratio of the heat-adhesive fibers may if 5 wt% or more, preferably 10 wt% to 70 wt% or, no problem even close to 100%. Seedling container of the present invention
The method of molding, the required as a random or a cross web at the mixed-fiber known web forming machine for example land Webber machine or a carding machine or the like having a basis weight for example 40400 g / m
The have some form of regulated bulky web or laminate web <br/> ^two of these webs lightly needling or thermoplastic resin binder was formed by spraying the thickness 35mm following nonwoven Nunoma Tsu <br / > G can be used.

According to the method for molding a seedling container of the present invention
Is, the above-mentioned non-woven web or non-woven Nunoma Tsu door, a hot plate
On the lower mold which is fixed to the die and heated to around 100 ℃
After being placed on a
Remove the upper mold from the inner part to the outer part
Descends in order, and heats up sequentially from the bottom of the container to each step.
By compressing, one step or more in the entire circumferential direction of the inner and outer walls
A seedling container with a uniform fiber density with multiple horizontal steps
Can be molded.

By the way, at the time of normal molding,
Since the squeezing pressure is applied to the bottom of the container, the bottom becomes thinner.
Although the direction, high diameter d and the container bottom of the container to be molded
The relationship with the depth (aperture depth) h is 2h / d = 1.5 or less .
When adjusted so that the bottom surface is not thinned, the occurrence of wrinkles and overlapping portions on the side surfaces is further eliminated.

[0010]

EXAMPLES The present invention will be described more specifically with reference to the following examples.

Fiber composition: polyester fiber 2d × 51 mm
70%, heat bonding fiber (low melting point polyester fiber) 15d
The × 51mm30% of mixed fiber, after forming a cross-web basis weight 200 g / m ² by the card machine and Kurosureya machine to form a nonwoven Nunoma Tsu preparative thick 8mm subjected to needle punching of 200P / cm ² .

[0012] was cut into a size suitable for molding the nonwoven Nunoma Tsu door, using a pair of concave and convex mold attached to the hot press,
Molding was performed at a mold temperature of 120 ° C., a compression pressure of 6 tons, and a compression time of 20 seconds. At the time of this molding, FIG. 1 (a), (b),
(C) sequentially molded as shown in to place feeding hot pressing hot platen 1 convex mold 2 nonwoven Nunoma Tsu preparative 3 on which is fixed to as a lower die is performed.

The convex mold 2 is provided with a horizontal step 5 over the entire circumference at a location of the tapered side wall 4 corresponding to half the height of the seedling container to be molded. The step width is 5 mm. Was.

The concave mold 6 which is pressed down from above is divided into an inner mold 7 and an outer mold 8 at a step, and is fixed to a hot press hot platen 9. Each mold is heated to a constant temperature (120
° C), the concave mold first descends as shown in (b), and the inner mold 7 supported by the gas cushion descends immediately before the convex mold, and the upper part of the step is compression molded for 3 seconds.
Next, as shown in FIG. 1 (c), the outer mold 8 of the concave mold was lowered, and the lower part of the step was compression-molded for 3 seconds to mold a seedling growing container .

As shown in FIG. 2, the obtained seedling raising container 10 has a size of 4, a height of 100 mm, an opening outer diameter of 120 mm, a bottom outer diameter of 76 mm, a wall thickness of 0.8 mm, and a weight of 15 g. It has a horizontal step portion 12 inwardly in the entire circumferential direction of the container,
The fiber density of both the bottom 13 and the side wall 11 is 0.29 g / cm ³
No overlapping portions or wrinkles of the nonwoven fabric were observed on the side wall portion.

[0016]

According to the present invention , a pair of concave and convex molds is used.
The step part is one step from the part corresponding to the bottom of the container to be molded
Each time it was molded by thermal compression,
With at least one horizontal step, and
Having a uniform fiber density without density unevenness and wrinkles, ventilation
A seedling container having good properties and good water permeability can be molded.
Also, there is a gap between the container and the horizontal step.
There is formed, the raw flow through the air is performed smoothly plant
Seedling containers that have a positive effect on length can be easily molded. Sa
In addition, plants whose roots grew evenly in the container and grew
It becomes easier to pull out for replanting, around the root
Soil is hard to fall, and almost all plants die due to replanting.
Excellent effects such as molding of seedling containers that do not grow
It plays a fruit.

[Brief description of the drawings]

1 (a), 1 (b) and 1 (c) are exploded views showing an example of a method for molding a seedling raising container of the present invention.

FIG. 2 is a cross-sectional view of a seedling raising container obtained according to the present invention.

[Explanation of symbols]

1,9 hot pressing hot platen 2 convex mold 3 nonwoven Nunoma Tsu DOO 4 tapered side wall 5 stepped portion 6 concave mold 7 the inner die 8 outer mold 10 nursery container 11 sidewall 12 horizontal step portion 13 bottom

Claims (1)

(57) [Claims] 1. An apparatus having at least one horizontal step portion.
A method of molding a woven cloth seedling container, comprising a heat-adhesive fiber.
Consisting of natural fibers, synthetic fibers or a mixture of these.
Reduce the nonwoven web or nonwoven mat in all directions around the side wall.
At least one of a pair of concave and convex molds with one step
After placing on the lower mold, the inner part
And the outer part or more
Lowering the upper mold that is present from the inner part
Then, heat compression molding for each step from the part corresponding to the bottom of the container
A method for forming a non-woven seedling growing container made of nonwoven fabric .