JPH1076400A - Injection press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply, easily and surely fix a packing to the prescribed position of a lower surface of a sealing frame, to improve the service life of the packing, to use the packing without exchanging it for a long time, and to simply exchange the packing as necessary. SOLUTION: In an injection press, a sealing frame 3 is arranged between hot plates 1. The sealing frame 3 is held by the hot plates 1 to form a heating chamber 2 sealed between the upper and lower hot plates 1 and the sealing frame 3. Steam is force fed in the heating chamber 2, a product is heated with the steam, and the product is pressurized by the hot plates 1. The sealing frame 3 is fixed to the lower surface of the upper hot plate 1 in an air-tight manner, and a packing 5 is mounted along the lower surface of the sealing frame 3. The packing 5 is inserted in a guide groove 6 with lower opening which is provided along the sealing frame 3. The packing 5 is held in the guide groove 6 by stop screws 11 projected in the guide groove 6 from a side of the sealing frame 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection press in which a product to be pressed is heated with steam and pressed with a hot plate.

[0002]

2. Description of the Related Art An apparatus for pressing a plate material such as plywood while heating it with a hot plate has been developed. This device, for example,
The plate is pressed and compressed by two hot plates, and the plate is further heated by the heated hot plate. The plate material compressed by the hot plate comes into surface contact with the hot plate and is heated by heat conduction from the hot plate. This device has a feature that when heating a thin plate material, it can efficiently heat the upper and lower surfaces in a short time.

However, this apparatus cannot sufficiently heat the inner surface of a thick plate in a short time.
This is because the thermal conductivity of the plate is poor. A plate material having poor heat conductivity is heated at the contact surface with the hot plate, but heat is not efficiently conducted from the surface to the inside, and the inside cannot be heated efficiently. In particular, when a plate material having a low density is heated by this method, the heating state is further deteriorated, and it takes a long time to heat the inside to the inside. It is a low density object
This is because its internal structure is rough, making it difficult to transfer heat.

[0004] As an apparatus for heating such a product, an injection press has been developed in which steam is injected into a closed space, the steam penetrates the plate material, and the plate material is directly heated by the steam. Fig. 1
As shown in the schematic cross-sectional view of FIG.
And a sealing frame 3 disposed between the hot plates 1 to form a closed heating chamber 2 and a cylinder 4 for pressing the hot plate 1. The sealing frame 3 is airtightly fixed to one of the upper and lower heating plates 1, and a packing 5 is disposed between the sealing frame 3 and the surface of the heating plate 1 that is not fixed. The packing 5 is sandwiched between the heating plate 1 and the sealing frame 3 to hermetically seal the space between the sealing frame 3 and the heating plate 1. In view of the fact that the packing is easily mounted on the closed frame, the closed frame is preferably fixed to the lower hot plate. This is because the sealing frame fixed to the lower hot plate can be provided with packing on the upper surface. The packing mounted on the upper surface of the closed frame does not drop unlike the packing provided on the lower surface, and can be easily disposed at a fixed position.

However, when the closed frame is fixed to the lower hot plate,
When the hot plate is opened, a product such as a plate material is carried into the hot plate, or it becomes an obstacle to take out the pressed plate material from the hot plate. For this reason, from the viewpoint of work efficiency, the closed frame needs to be fixed to the lower surface of the upper heating plate 1 as shown in FIGS. However, it is necessary to mount the packing 5 on the lower surface of the closed frame 3 fixed to the lower surface of the upper hot plate 1. The packing 5 needs to be disposed at an accurate position on the lower surface of the closed frame 3. This is because if the packing 5 is displaced from the sealing frame 3, the space between the sealing frame 3 and the hot plate 1 cannot be reliably hermetically sealed.

In order to dispose the packing 5 at a fixed position on the lower surface of the sealing frame 3, the sealing frame 3 is provided with a guide groove 6 having a lower opening.
The packing 5 is inserted into the guide groove 6. The packing 5 inserted into the guide groove 6 tends to drop from the guide groove 6 by its own weight. The packing 5 is bonded to the bottom of the guide groove 6 to prevent the packing from dropping.

[0007]

However, the packing adhered and fixed to the guide groove has a disadvantage that it is easily peeled off. In particular, since the adhesive is heated by a closed frame or a hot plate, the adhesive material is significantly deteriorated with time, and it is extremely difficult to securely adhere the packing to the guide groove for a long period of time. Furthermore, the packing adheres to the surface of the hot plate when pressed against the hot plate, and when the hot plate is separated, the packing is easily pulled off from the guide groove by the attached hot plate and easily peeled off. If the packing is firmly adhered to the guide groove so as not to be peeled off in order to prevent this bad effect, there is a problem that it takes a lot of trouble when replacing the packing. Each time the hot plate is opened and closed, the packing is sandwiched between the closed frame and the hot plate and crushed. Therefore, when used for a certain period of time, the packing deteriorates and must be replaced. For this reason, it is extremely important that the packing can be easily replaced. The injection press that bonds the packing to the guide groove cannot realize a structure in which the packing is securely fixed at an accurate position of the closed frame and can be easily replaced. These characteristics are mutually contradictory characteristics, and it is extremely difficult to satisfy both characteristics.

As a method of solving this problem, for example, as shown in FIGS. 3 and 4, a mechanism for mechanically holding the packing 5 by narrowing the opening of the guide groove 6 provided on the lower surface of the sealing frame 3 is also available. Conceivable. The guide groove 6 shown in these figures is
The structure is such that the opening width of the guide groove 6 is made narrower and the inner part becomes wider, so that the packing 5 does not easily come off. The rubber-like elastic packing 5 is forcibly inserted into the guide groove 6 of this structure while being elastically deformed. Packing 5 inserted
Is the elastic force to be restored, and the opening edge 6 of the guide groove 6 is
A is pressed and fixed, so that it is difficult to separate from the guide groove 6 and fall off.

However, the packing 5 inserted into the guide groove 6 of this structure has a disadvantage that it is easily broken near the opening edge 6A of the guide groove 6. This is because the packing 5 is always kept under stress from the opening edge 6A of the guide groove 6. Further, each time the packing 5 is sandwiched between the closed frame 3 and the hot plate, the packing 5 is repeatedly pressed and opened with respect to the lower hot plate and becomes fatigued. Furthermore, closed frame 3
Is pressed against the hot plate, the guide groove 6
Is strongly pressed locally at the corner of the guide groove 6 indicated by the arrow, and this portion is significantly deformed and severely damaged. For this reason, the damage of the packing 5 becomes more severe. Damaged packing prevents the heating chamber from being maintained in a sealed state, and reduces the heating efficiency of the product. Therefore, if the packing is damaged, it is necessary to stop the apparatus and replace the packing, which lowers the cost and production efficiency.

The present invention has been developed to solve these disadvantages. An important object of the present invention is to easily and easily fix the packing in a fixed position on the lower surface of the closed frame, extend the life of the packing, and use the packing without replacing the packing for a long time. An object of the present invention is to provide an injection press capable of reducing production costs and improving production efficiency. It is a further important object of the present invention to provide an injection press in which packing can be easily replaced if necessary.

[0011]

In the injection press of the present invention, a closed frame 3 is provided between hot plates 1. The closed frame 3 is sandwiched between the hot plates 1, and the upper and lower hot plates 1
To form a closed heating chamber 2. This heating room 2
The steam is press-fitted, the product is heated by the steam, and the product is pressurized by the hot plate 1.

Further, in the injection press of the present invention, the closed frame 3 is air-tightly fixed to the lower surface of the upper hot plate 1, and the packing 5 is mounted along the lower surface of the closed frame 3. The packing 5 is inserted into a guide groove 6 having a lower opening provided along the closed frame 3. In addition, packing 5
Is a set screw 1 protruding from the side surface of the closed frame 3 into the guide groove 6.
1 is held in the guide groove 6.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. However, the following examples illustrate an injection press for realizing the technical idea of the present invention, and the present invention does not specify the injection press as follows.

Further, in this specification, in order to make it easy to understand the claims, the numbers corresponding to the members shown in the embodiments will be referred to as “claims” and “ In the column of “means”. However, the members described in the claims are not limited to the members of the embodiments.

The injection press shown in FIG.
Two hot plates 1 disposed horizontally, a sealing frame 3 disposed between the hot plates 1, a cylinder 4 for raising and lowering the lower hot plate 1, and steam to the hot plate 1. Supply steam boiler 7
And

The heating plate 1 is provided therein with a heating steam passage 8 for heating the heating plate 1 and an injection steam passage 9 for injecting steam into the heating chamber 2 hermetically sealed. The heating steam path 8 is used to uniformly heat the hot plate surface.
Are provided in parallel at regular intervals. Heating steam path 8
Is connected to the steam boiler 7 and the steam boiler 7
Heats the surface of the hot plate with steam supplied from.

The injection steam path 9 injects steam into the heating chamber 2 sealed by the hot plate 1 and the sealing frame 3. Therefore, it is opened in communication with the heating chamber 2. The injection steam path 9 is also connected to the steam boiler 7 and injects steam into the heating chamber 2. The injection press shown in the drawing injects steam from the upper and lower hot plates 1 to the heating chamber 2. Although not shown, the steam injected into the heating chamber 2 can be injected from a closed frame or from one hot plate.

The closed frame 3 is fixed to the lower surface of the upper hot plate 1. FIG. 6 shows a bottom view of the hot plate 1 to which the closed frame 3 is fixed.
FIG. 7 shows an enlarged sectional view of the closed frame 3. The closed frame 3 is formed in a rectangular shape along the outer periphery of the hot plate 1, and is hermetically fixed to the lower surface of the hot plate 1 via bolts 10.

The sealing frame 3 shown in FIG. 7 is provided with guide grooves 6 for inserting the packing 5 along both upper and lower surfaces. The packing 5 to be inserted into the guide groove 6 is formed into a loop shape having a length that can be inserted into the guide groove 6 having a rectangular overall shape. Further, the packing 5 is formed by molding a rubber-like elastic body such as silicon rubber into a circular or elliptical cross-sectional shape. The packing 5 inserted into the upper guide groove 6 is in close contact with the hot plate 1 for fixing the closed frame 3. Lower guide groove 6
Is tightly adhered to the lower hot plate surface in an airtight manner.

The closed frame 3 is airtightly fixed to the lower surface of the upper hot plate 1 via bolts 10 with the packing 5 inserted in the upper closed frame 3 in FIG. The bolt 10 passes through the closed frame 3 and is screwed into the female screw hole 1A provided in the hot plate 1 to fix the closed frame 3 to the hot plate 1.

FIG. 8 is an enlarged sectional view of the lower guide groove 6 provided in the closed frame 3. As shown in FIG. The guide groove 6 shown in this figure is a groove having a U-shaped cross section, and is formed into a shape in which the corners of the opposing openings are chamfered. The guide groove 6 provided below the closed frame 3 has, for example, a width of 6 mm and a depth of 7 mm.
mm, where the vertical and horizontal dimensions of the cross section are 6 × 8 mm
Is inserted. As shown in FIG. 8, the packing is formed into a shape in which a corner portion is chamfered with a curvature radius of, for example, 2.5 mm. Further, the inside of the closed frame 3 shown in FIG.

As shown in FIG. 8, the sealing frame 3 for chamfering the opening edge of the guide groove 6 and the corner of the packing 5
There is a feature that the damage of the packing 5 can be reduced. that is,
When pressing the surface of the closed frame 3 against the hot plate, the packing 5
Is pushed into the guide groove 6. If the packing 5 is not pushed into the guide groove 6 when pressing, a part of the packing 5 protruding from the guide groove 6 is thinly crushed on the surface of the hot plate and the sealing frame 3 and is significantly damaged.
In the closed frame 3 of FIG. 8, the packing 5 does not protrude from the guide groove and is not strongly crushed by the hot plate and the surface of the closed frame, so that damage to the packing 5 can be reduced and the service period can be extended.

As shown in FIG. 8, the packing 5 inserted in the guide groove 6 is held in the guide groove 6 by a set screw 11 projecting from the side surface of the closed frame 3 into the guide groove 6. Set screw 11
Has a shape that can be inserted into the packing 5 with its tip sharpened. The set screw 11 is a tapping screw. When a tablet is used for the set screw, the through hole 12 into which the tablet is screwed is inserted.
Does not necessarily need to be provided with a female screw. However, a female screw can be provided. Instead of the tapping screw, a normal screw may be used as the set screw, and this screw may be screwed into a through hole provided with a female screw. The set screw 11
To prevent the packing 5 from sagging, for example,
The packing 5 is screwed into the closed frame 3 at a pitch of 30 cm to fix the packing 5 to the guide groove 6. In the closed frame 3 shown in the figure, since the guide groove 6 is provided along the inside, the set screw 11 is screwed from the inside of the closed frame 3 toward the guide groove 6. However, although not shown, the set screw can be screwed into the guide groove from outside the closed frame. It can also be screwed in from both inside and outside.

[0024]

The injection press of the present invention realizes the following excellent features. The packing can be easily and easily fixed at a fixed position on the lower surface of the closed frame. This is because the injection press of the present invention provides a guide groove at the lower opening of the guide groove, and holds the packing in the guide groove with a set screw projecting from the side surface into the guide groove. The sealing frame in which the set screw holds the packing in the guide groove does not need to prevent the packing from dropping by the guide groove. For this reason, the guide groove does not need to have a special shape that narrows the opening and prevents the packing from falling, for example. The guide groove which does not narrow the opening allows the packing to be easily inserted. Furthermore, since packing can be inserted into the guide groove and held with set screws,
Packing can be extremely easily installed.

By extending the life of the packing and using it for a long time without replacing the packing, the running cost can be reduced and the production efficiency can be improved. that is,
Since the injection press of the present invention does not hold the packing by bonding it to the closed frame, nor does it hold the packing at the opening of the guide groove, but holds the packing with a set screw projecting into the guide groove. It is. The packing adhered to the sealing frame or held in the opening of the guide groove is peeled off from the bonding part, or is crushed at the opening of the guide groove to cause damage. On the other hand, as in the injection press of the present invention, the structure in which the packing is held by the set screw projecting from the side into the guide groove is such that the packing falls off and is crushed by the hot plate and the surface of the sealing frame, or There is no damage by strongly pressing the corners of the guide groove, and damage to the packing can be extremely reduced.

When necessary, the packing can be easily replaced. This is because the injection press of the present invention holds the packing in the closed frame with a set screw projecting into the guide groove. The sealing frame of this structure can easily replace the packing by loosening the set screw, and can securely hold the packing by tightening the set screw.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a conventional injection press.

FIG. 2 is a schematic cross-sectional view showing a conventional injection press.

FIG. 3 is a cross-sectional view illustrating an example of a guide groove of a closed frame of a conventional injection press.

FIG. 4 is a cross-sectional view showing another example of the guide groove of the closed frame of the conventional injection press.

FIG. 5 is a schematic cross-sectional view of an injection press according to an embodiment of the present invention.

FIG. 6 is a bottom view of a hot plate for fixing the closed frame shown in FIG. 5;

FIG. 7 is an enlarged sectional view of the closed frame shown in FIG. 5;

FIG. 8 is an enlarged sectional view of a main part of the closed frame shown in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Hot plate 1A ... Female screw hole 2 ... Heating chamber 3 ... Sealing frame 4 ... Cylinder 5 ... Packing 6 ... Guide groove 6A ... Opening edge 7 ... Steam boiler 8 ... Heating steam path 9 ... Injection steam path 10 ... Bolt 11 ... Set screw 12: Through hole

Claims (1)

[Claims] A closed frame (3) is provided between the hot plates (1), the closed frame (3) is sandwiched between the hot plates (1), and the upper and lower hot plates (1) and the closed frame. (3) and a closed heating chamber (2) is formed, steam is press-fitted into the heating chamber (2), and the product is heated by the steam,
In the injection press configured so that the product is pressed by the hot plate (1), the sealing frame (3) is airtightly fixed to the lower surface of the upper hot plate (1), and the sealing frame (3) is A packing (5) is attached along the lower surface, and the packing (5) is inserted into a guide groove (6) of a lower opening provided along the sealing frame (3). 5) An injection press characterized by being held in the guide groove (6) by a set screw (11) projecting from the side surface of the closed frame (3) into the guide groove (6).