JPH06319369A - Pressing form for forming mushroom cultivation medium - Google Patents

Abstract

PURPOSE:To obtain a pressing form capable of efficiently forming a medium into a prescribed foam by using an elastic member having ventilation holes and placing the member opposite to the pressing face of a pressing form in a state extending in the form of a hood. CONSTITUTION:An elastic member 9 having ventilation holes 11 is placed opposite to the side of a pressing face 3 of a rigid pressing form 1 in a state extending in the form of a hood. The elastic member is made slightly larger than the pressing face and fills the gap between the rigid pressing form and a culture vessel. The air pressure generated by the vertical reciprocation motion of the pressing form is released through the ventilation holes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for forming a mushroom culture base, which is used when press-molding a mushroom medium filled in a culture container for mushroom cultivation.

[0002]

2. Description of the Related Art Conventionally, in the artificial cultivation of mushrooms, bottles, bags,
A container such as a Toro box is filled with a mushroom medium, sterilized, and then inoculated, and this is cultured in a container-filled state to generate fruiting bodies from the upper surface of the medium. In addition, it is also practiced to use a mushroom-cultured medium filled and molded in a container as a mushroom culture medium, remove it from the container, and culture it in the same manner as above to generate fruiting bodies from the mushroom culture medium. in this case,
For the purpose of homogenizing water retention conditions and air circulation conditions in the medium, while filling the medium into the container while pressurizing with a screw nozzle or the like, after filling, press-molding the upper surface using a die Is being done.

Prior to the present application, the applicant of the present invention found that a fruiting body was efficiently generated when a special medium having a medium thickness of 5 to 10 cm was used as a mushroom culture medium, and has already filed an application. (Japanese Patent Publication No. 4-7648). In addition, when the one whose bottom surface is formed in a substantially flat surface and whose top surface is formed in a convex shape is used instead of the cylindrical shape whose top and bottom are flat, the fruiting body can be obtained in high yield. It was found that they could be made, and they are still applying (Japanese Patent Publication No. 4-39964). In this case, it is important to shape the upper surface of the medium into a convex shape, and when filling the container of the medium, the upper surface is raised. That is, in the artificial cultivation of mushrooms, the fruiting bodies are mainly generated from the upper surface of the mushroom culture medium. Therefore, by improving the formability of the medium on the upper surface, it is possible to uniformly and stably obtain the fruiting bodies.

However, it is difficult to improve the formability of the mushroom culture medium on the upper surface of the medium. First, the mushroom medium has a high water content of 50 to 80% by weight, and secondly, This is because the viscosity is increased due to the addition of nutrients such as rice bran and malt and a revenue increasing agent such as corn type, barley type and soybean type, so that a so-called sticky medium property is obtained. Therefore, at the time of press molding, the medium adheres to the pressing surface of the die, or when the medium is continuously mechanically pressurized, the medium is blown up from the gap between the die and the culture vessel, so that the upper surface of the medium is formed. It becomes uneven. For example, as shown in FIG. 7, the culture medium may be flat (a) or convex (b)-
In the case of shaping into (d), when the medium 2 is pressed by the die 1,
The medium 2'is attached to a part of the pressing surface 3 of the die, and the molding of the upper surface of the medium becomes uneven. This tendency becomes stronger as the pressing surface 3 becomes concave.

In addition, when a mushroom culture medium is usually prepared,
As shown in FIG.
Drilling several holes 5 is performed. In this case, the adherence of the medium 2'to the root of the perforation rod 4 on the pressing surface 3 becomes more remarkable, not only the moldability of the upper surface of the medium deteriorates, but also the medium adhering to the pressing surface becomes hard by continuous work. Compressed,
Difficult to remove easily. In addition, A to C in FIG.
4G to I, when the medium 2 is formed by pressing, the medium is blown up from the gap 7 between the die 1 and the culture vessel 6, and the upper surface of the medium is unevenly formed. This is because if the gap between the die and the culture vessel is eliminated, it will damage the culture vessel and cause contamination of harmful bacteria during culturing.When performing mechanical continuous production, the head of the die will move up and down due to vertical movement. Negative pressure and positive pressure aeration pressure are generated in the space 8 and continuous production cannot be performed. Therefore, it is impossible to prevent the medium from being blown up by providing a gap to some extent.

In addition, prior to the present application, the applicant of the present invention, when press-molding a medium, presses a plurality of pre-molding dies capable of gradually shaping the shape of the medium in order, thereby applying a pressure to the medium density. It has been found that a uniform medium molded product can be obtained and has already filed an application (Japanese Patent Publication No. 3-71084). In this method, for example, when the upper surface of the culture medium is formed into a convex shape, a plurality of preforming molds having concave pressing surfaces and different inclination angles are used. For example, as shown in FIG. 7, (d)
The pressure is applied in the order of → (c) → (b) to obtain a molded medium product having a uniform density. However, the moldability of the upper surface of the medium varies, and again, the medium adheres to the pressing surface,
It was unavoidable that the corresponding upper surface of the medium had a depression.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent the culture medium from being blown up in the gap between the die and the container, and It is an object of the present invention to provide a mold for forming a mushroom culture substrate, which can prevent the culture medium from adhering to the pressing surface and can always stably form the culture medium having a predetermined shape.

[0008]

[Means for Solving the Problems] The above-mentioned object is a molding die used when press-molding a mushroom medium filled in a culture container for mushroom cultivation, and a rigidity for shaping the mushroom medium. An elastic body, which is larger than the pressing surface and has a ventilation portion, is attached to the pressing surface side of the pressing mold body made of a material, and a pressing surface protruding from the pressing mold body in a canopy shape is formed. It is achieved by a die for mold forming a mushroom culture medium.

[0009]

According to the present invention, the pressing surface of the pressing mold body is larger than the pressing surface and smaller than the caliber of the culture container, and is press-molded using a pressing mold to which an elastic body having a ventilation part is attached. The moldability of the upper surface of the medium can be remarkably improved.

Next, the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing an embodiment of the present invention. In the figure, 1 is a die main body, 9 is an elastic sheet, and 10 is a die with an elastic sheet. As shown in FIG. 1, the molding die of the present invention has an elastic sheet 9 attached to the pressing surface 3 side of a die main body 1. The elastic sheet 9 is made slightly larger than the pressing surface so as to protrude from the outer peripheral end of the pressing surface 3 in a canopy shape, and fills the gap 7 between the pressing mold body 1 and the culture vessel 6. Further, the elastic sheet 9 is provided with a ventilation hole 11 in order to release the air pressure generated during the upward and downward piston movement of the pressing die.

The press molding using the pressing die with elastic sheet 10 may be performed by attaching the pressing die with elastic sheet 10 to a conventional pressing molding apparatus. As shown in FIG. 2, when the pressing die with an elastic sheet 10 is used, the gap 7 between the pressing die main body 1 and the container 6 is filled with the elastic sheet 9, so that the culture medium does not blow up,
Moreover, when the pressing die 10 returns to the upper part, the elastic sheet 9 vibrates appropriately and prevents the culture medium from adhering to the pressing surface of the pressing die 10. At this time, the air pressure generated by the upward / downward piston movement of the pressing die can be released by the ventilation hole 11 provided in the elastic sheet 9.

In order to obtain a convex mushroom culture medium as shown in FIG. 3F, a die as shown in FIG. 3D is used and the desired mushroom culture medium is obtained by press molding in the order of 3D → E → F. can get. Furthermore, as shown in FIG. 4J → K → L, the upper surface of the medium is made flat and the perforation rod 4 is used to
Even when the hole 5 is formed in the central portion of the medium, the same effect as described above can be obtained, and uniform pressing can be performed by using the elastic sheet 9 having a desired shape of the upper surface of the medium. Further, the vibration of the elastic sheet 9 that occurs when the pressing die returns to the upper part is fixed between the pressing surface and the elastic sheet 9 by, for example, fixing the attachment portion 12 to the pressing surface at a point near the center of the pressing surface. It becomes more effective by making a gap. In addition, providing a gap is also effective in discharging air pressure.

As the shape of the elastic body used in the present invention, as shown in FIG. 5, a rope-like shape is assembled in a mesh shape, or a predetermined shape is formed by punching. Proper ventilation is essential. The ventilation part may be provided in any part of the elastic body, but it is preferable to provide it in at least a part of the elastic body which is projected from the die main body, and more preferably in the entire elastic body in terms of air pressure discharge efficiency. Is desirable. Further, the size of the elastic body is larger than the pressing surface of the pressing die and smaller than the diameter of the culture container, but may be somewhat larger than the diameter of the container as long as it has excellent flexibility. Further, the thickness t of the elastic body shown in FIG. 5 depends on the strength of the elasticity, but if it is too thick, clogging of the aeration part with the medium occurs, and if a coarse mesh width is used to prevent this, the medium t Since the moldability of the upper surface is deteriorated, it is preferably 10 mm or less.

The material of the elastic body is, for example, polyethylene, polypropylene, vinyl chloride, polystyrene, A
S resin, ABS resin, methacrylic resin, polycarbonate, polyamide, polyacetal, cellulose acetate, saturated polyester resin, polyvinylidene chloride, polybutadiene, EVA resin, polyurethane, phenolic resin, urea resin, melamine resin, unsaturated polyester resin, guanamine resin, etc. Examples of the plastic, foamed plastic, rubber, glass fiber, metal, etc., but if the culture container is scratched and there is a concern that pinholes will contaminate harmful bacteria, glass fiber covered with Teflon, or FIG. As shown in (I), it is possible to improve wear durability by using the steel cord 13 covered with polyurethane 14. The vent holes 11 may be provided not only in the elastic sheet 9 but also in the die body 10.

[0015]

Industrial Applicability As described above, when a mushroom culture medium for mushroom cultivation is obtained, by press molding using the molding die of the present invention, it is desired that the medium is molded into a convex shape, a curved surface shape, a multi-stage shape, or the like. It is possible to easily and evenly shape the upper surface of the medium, and it is possible to stably obtain fruiting bodies with a uniform high yield. That is, since the medium does not adhere to the pressing surface of the die and the shape of the pressing surface is always repeated in the same state, the medium can always be shaped into a constant shape, and the molding device is stopped to remove the adhered medium. Since it is not necessary, it helps improve production capacity. In addition, the medium is not blown up around the culture vessel, and the molding is performed well. Next, the present invention will be specifically described with reference to examples.

(Example 1) As a medium, sawdust and rice bran were mixed at a ratio of 10: 3 (weight), water was added to the mixture, and the water content was 60.
What was adjusted to -65 weight% was used. This medium was filled in a cylindrical polypropylene bag having a diameter of 14 cm, and pressure-molded by a pressing die with an elastic sheet attached in the order of FIG. 4J → K → L using the pressing die with an elastic sheet shown in FIG. 4J. At this time, the elastic sheet having the specifications of FIG. 5 (I) was used, the thickness t was 4 mm, and the thrust of the cylinder to be pressure-molded was 1000 kg / f. The press molding of the medium was continuously performed 20 times, and the shape of the medium was measured.

(Comparative Example 1) A die shown in FIG. 4G was used, and pressure molding was performed in the order of G → H → I. Others were the same as in Example 1.

FIG. 6 shows the culture medium molding conditions of Example 1 and Comparative Example 1. The medium formation was continuously performed 20 times, but since Comparative Example 1 showed substantially the same shape after the 5th time, 1 to 5
The state of the cross section in the second molding state is shown. As a result, in Example 1, both the 1st to 5th times and the 5th time and thereafter, the medium forming state was good and uniform, but in Comparative Example 1, swelling of the medium was observed from the gap between the die and the culture bag, In addition, after the fifth time, the medium adhered to the root of the punched punch rod, and the hole in the center of the medium for inoculation of the inoculum could not be uniformly formed.

(Examples 2 to 5, Comparative Examples 2 to 5) The shape of the pressing die, the state of the pressing surface, the material of the elastic sheet, and the thickness of the elastic sheet are set as shown in Table 1, and press molding is performed continuously.
I checked the condition. Other conditions were the same as in Example 1.

[0020]

[Table 1]

As is clear from the results in Table 1, continuous production was impossible for the elastic sheet having no ventilation part (Comparative Example 2). Further, even if the ventilation part is provided, when stainless steel wire (metal) having no elasticity is used (Comparative Example 5), the culture bag itself is scratched, which causes contamination by pinholes during culture. During the press molding, the culture medium adhered to the pressing surface, and the molding on the top surface of the culture medium became uneven. This is because the stainless wire does not have elasticity, so it is not possible to obtain the appropriate vibration when the elasticity that is seen in the elastic sheet returns, and as described above, the sheet-shaped object attached to the pressing surface of the die has an appropriate elasticity. It turns out that it is necessary to have a vent.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory view showing a state of press molding using the pressing die shown in FIG.

FIG. 3 is an explanatory view showing a comparison of press molding between the present invention and a conventional technique.

FIG. 4 is an explanatory view showing a comparison of press molding between the present invention and a conventional technique.

FIG. 5 is an explanatory view showing an example of an elastic sheet material according to the present invention.

FIG. 6 is an explanatory view showing a state of press molding of Example 1 and Comparative Example 1.

FIG. 7 is an explanatory diagram showing a conventional technique.

FIG. 8 is an explanatory diagram showing a conventional technique.

[Explanation of symbols]

 1 Main body of pressing mold 2 Medium 3 Pressing surface 6 Culture container 9 Elastic sheet 10 Pressing mold with elastic sheet 11 Vent hole

Claims (1)

[Claims] 1. A mold for use in press-molding a mushroom medium filled in a culture container for mushroom cultivation, the pressing surface side of a mold body made of a rigid material for shaping the mushroom medium. A mold for forming a mushroom culture substrate, characterized in that an elastic body having a ventilation part, which is larger than the pressing surface, is attached to form a pressing surface protruding from the pressing body in an eaves shape.