JPH07112476A - Method and apparatus for producing wax sheet - Google Patents

Abstract

PURPOSE:To produce a wax sheet used in order to bond a wax layer with definite thickness by utilizing the viscosity of wax itself in place of immersing a sheet like article to be coated in molten wax or coating the same with molten wax by a brush when the wax layer with definite thickness is formed on a the sheet like article to be coated. CONSTITUTION:In the continuous production of a wax sheet with definite thickness, molten wax is continuously supplied to the upper surface of a lower release sheet 56 fed almost horizontally at a constant speed in almost constant thickness and gradually cooled while the lower release sheet 56 is almost horizontally fed and an upper release sheet 54 fed at the same speed so as to keep the interval constant from the lower release sheet 56 is superposed on the gradually cooled wax and the upper and lower release sheets 54, 56 are fed out while wax is held between both sheets.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a wax sheet having a constant thickness.

[0002]

2. Description of the Related Art When a wax layer is formed on the surface of a sheet or plate (hereinafter referred to as a wax coated object or a laminated object), a method of immersing the coated object in a molten wax tank has been widely used. Has been. A method of applying molten wax to the surface of an object to be coated with a brush is also widely used.

[0003]

Problems of the Prior Art In these conventional methods, it is very difficult to control the coating thickness of the wax to be constant,
There is a problem that the thickness of the wax layer varies greatly.

[0004]

SUMMARY OF THE INVENTION In view of the above circumstances, the inventor of the present invention, when forming a wax layer having a constant thickness on a sheet-shaped object to be coated, dips the molten wax layer or coats it with a brush. Instead of the above, it was considered to bond a wax sheet having a certain thickness using the viscosity of the wax itself. A first object of the present invention is to provide a method for producing a wax sheet used for this purpose. A second object is to provide a manufacturing apparatus used directly for carrying out this method.

[0005]

According to the present invention, a first object of the present invention is to provide a method for continuously producing a wax sheet having a constant thickness, in which the wax sheet is melted on the upper surface of a lower release sheet which is conveyed substantially horizontally at a constant speed. Wax is continuously supplied at a substantially constant thickness, the molten wax is gradually cooled while the lower release sheet is conveyed substantially horizontally, and the gradually cooled wax is separated from the lower release sheet by a distance. Is kept constant and the upper release sheet conveyed at the same speed is superposed, and the wax is carried out by sandwiching the wax between the upper and lower release sheets and is carried out.

A second object is an apparatus for continuously producing a wax sheet having a constant thickness, and at least two lower transfer rollers which transfer the lower release sheet substantially horizontally and at a constant speed, and these. A horizontal base that holds the lower release sheet substantially horizontally from below between the two lower transport rollers, and a molten wax is supplied from the vicinity of the upstream end of the horizontal base to the lower release sheet at a substantially constant thickness. A wax sheet for manufacturing a wax sheet, comprising: a wax nozzle for controlling the lower release roller; and an upper transport roller for stacking the upper release sheet on the lower release sheet at the same speed while keeping a constant distance from the lower transport roller on the downstream side. Achieved by the device.

[0007]

1 is a front view showing an embodiment of the present invention, FIG.
Is a perspective view of a part thereof, and FIG. 3 is a plan view of the same. The wax sheet manufactured by this apparatus is laminated on, for example, both sides or one side of the occlusal force diagnostic sheet, and is used for diagnosing the tooth arrangement of the dental arch from the tooth pattern remaining on the wax sheet.

FIG. 4 is an enlarged cross-sectional view of a die-cutting blade for cutting out this wax sheet into a shape for use in an occlusal force diagnostic sheet, and FIG. 5 shows the shape of the die-cutting blade divided by the line V-V. Fig. 6 is a sectional view of a cut-out molded product, Fig. 7
Is an exploded view of an occlusal force diagnostic sheet using the same, FIG. 8 is a sectional view showing its structure, and FIG. 9 is a sectional view showing another structural example.

First, the structure of the occlusal force diagnostic sheet will be described with reference to FIGS. In FIGS. 8 and 9, reference numeral 10 is a sheet-shaped synthetic resin support, for example, P having a thickness of 25 μm.
A film of ET (polyethylene terephthalate) is used. Reference numeral 12 denotes a developer coating layer, which is formed by applying a liquid obtained by dispersing an acid clay (montmorillonite) sulfuric acid treatment product in water containing caustic soda onto one surface (surface) of the support 10 and drying it. is there.

Reference numeral 14 is a color-developing agent coating layer formed on the color-developing agent coating layer 12, which is a microcapsule prepared by dissolving a color-developing agent such as 1-phenyl-1-xylylethane in oil. is there. Here, the microcapsules are adjusted to various strengths, and the microcapsules to be destroyed change depending on the pressure. When the microcapsules are broken by the pressure, the color developer inside is absorbed by the color developer together with the oil to form a color. In this embodiment, the color is red. The density of this coloring increases with the increase of pressure.

Thus, the support 10 and the color developer coating layer 1
After laminating 2 and the color former coating layer 14, this laminated body is cut out into a substantially horseshoe shape. This shape is determined to closely follow the shape of a human dental arch.

Reference numeral 16 denotes a back waterproof layer, which is formed of the same PET film as the support 10, for example, a transparent film of 16 μm. Adhesive type glue is applied to one surface of the back waterproof layer 16 to form an adhesive layer 18. The back waterproof layer 16 is adhered to the back surface of the support 10 (the surface opposite to the developer coating layer 12) by an adhesive layer 18.

Reference numeral 20 denotes a front waterproof layer, which is made of a transparent PET film having a thickness of 16 μm like the back waterproof layer 16. The front waterproof layer 20 is superposed on the color developer coating layer 14 and adhered to the adhesive layer 18 of the back waterproof layer 16 along the outer periphery of the support 10. In this case, it is desirable to sufficiently reduce the pressure between both the waterproof layers 16 and 20 to create a vacuum.

Thus, the support 10 and the developer coating layer 1
2. The pressure sensitive sheet 22 is formed by covering the laminated body of the color former coating layer 14 with the waterproof layers 16 and 20 and adhering the peripheral edges. The pressure sensitive sheet 22 is sealed by the back waterproof layer 16 and the front waterproof layer 20. Therefore, the water resistance is improved, and even if the saliva is adhered in the oral cavity, the coloring property is not affected at all, and the reliability is increased.

Since the one waterproof layer 16 is adhered to the back surface of the support 10, the back waterproof layer 16 does not peel off or move from the support 10. Therefore, the front waterproof layer 20 whose periphery is adhered and fixed to the back waterproof layer 16 is also the support 10
Will not move against.

The horseshoe-shaped pressure-sensitive sheet 22 thus waterproofed with the waterproof layers 16 and 20 has a wax layer 2 on both sides thereof.
4, 26 are formed. The wax layers 24 and 26 are made of dental paraffin wax (JIS-T-6502) having a uniform thickness of, for example, 0.35 ± 0.03 mm. The wax sheet produced by the method of the present invention is waxed. It is attached using its own viscosity.

The wax layers 24 and 26 are preferably colored in a color close to the color complementary to the color of the pressure sensitive sheet 22, and in this embodiment, bluish green is used. By laminating the wax layers 24 and 26 in this manner, the occlusal pressure diagnostic sheet 28 is completed. The wax layer 24 may be formed only on one surface as shown in FIG.

Next, a method and an apparatus for manufacturing the wax sheets used for the wax layers 24 and 26 will be described with reference to FIGS. In FIG. 1, reference numeral 50 denotes a wax sheet manufacturing apparatus, which is a wax sheet 5 having a constant thickness and a constant width.
2 is sandwiched between a pair of upper and lower release sheets 54 and 56 to produce a laminated body 58. A die cutting device 100 is connected to a downstream stage of the wax sheet manufacturing apparatus 50, and the laminated body 58 is die-cut into a shape used for the occlusal force diagnostic sheet 28, that is, a substantially horseshoe shape.

The wax sheet manufacturing apparatus 50 comprises three lower conveying rollers 6 which are arranged in parallel with each other at a constant interval.
0, 62, 64 and these lower conveying rollers 60, 62,
Horizontal bases 66, 68 provided between 64, a wax nozzle 70 provided near the upstream end of the horizontal base 66 on the upstream side, and an upper conveyance roller 72 provided above the intermediate lower conveyance roller 62.
And release sheet supply reels 74 and 76.

The release sheet 56 supplied from the release sheet supply roller 74 is guided by the lower transfer rollers 60, 62 and 64 and the horizontal bases 66 and 68 and is transferred leftward in FIG. 1 at a constant speed. The release sheet 54 supplied from the other release sheet supply reel 76 is guided by the upper conveying roller 72 and is superposed on the lower release sheet 56 from above, and both sheets 56 and 54 are sent at the same speed. .

The upper carrying roller 72 is the lower carrying roller 62.
Are positioned so as to form a gap having a certain size between them. For the release sheets 54 and 56, for example, glassine paper is suitable, and particularly the standard 8 L (basis weight 74.5 g / m ² , thickness 71 μm)
m) or a standard 8LK (basis weight 100 g / m ² ,
A thickness of 93 μm) is suitable.

The wax nozzle 70 has a lower release sheet 5
The molten wax is supplied onto the sheet 6 at a constant width w (FIG. 3) narrower than the sheet 56 and at a constant thickness. This wax nozzle 7
The molten wax whose temperature is maintained at a constant temperature is supplied from 0 to the wax melting tank 78.

An electric heater 80 and an agitator 82 are attached to the wax melting tank 78 as shown in FIG.
The molten wax heated by the heater 80 is applied to the gear pump 84.
Is sent to the wax nozzle 70. An electric heater is built in the wax nozzle 70 to keep the molten wax flowing onto the release sheet 56 at a constant temperature.

The lower release sheet 56 on which the molten wax supplied from the wax nozzle 70 to a substantially constant thickness is placed is
The wax sheet 52 slides on the horizontal base 66 to move horizontally, and is cooled during this period to become the wax sheet 52. It is desirable to control the horizontal table 66 to a constant temperature with a heater or cooling water. Further, cooling air may be sent from above by a blowing fan 86 to promote cooling.

As shown in FIGS. 2 and 3, a pair of rollers 88, 88 are in rolling contact with both edges of the lower release sheet 56. These rollers 88, 88 are held so that the rotation surface 88a thereof, that is, the plane perpendicular to the rotation axis, is directed obliquely to the outer edge of the release sheet 56 in the feeding direction. Therefore, when the release sheet 56 is fed, the rollers 88 rotate and pull both edges of the release sheet 56 to the outside, and the wrinkles generated in the release sheet 56 by the heat of the molten wax can be extended.

The upper release sheet 54 has an upper conveying roller 72.
Is guided to above the lower conveyance roller 62 and overlapped on the semi-cured wax sheet 52, and the upper and lower release sheets 5
A laminated body 58 is formed which is composed of the wax sheets 52 in a semi-cured state and sandwiched between them. The laminated body 58 is further cooled while moving horizontally on the horizontal table 68. Since the interval between the upper and lower transport rollers 72 and 62 is kept constant, the thickness of the laminated body 58, that is, the thickness of the wax sheet 52 in the semi-cured state is also kept constant. In this state, cooling proceeds on the horizontal table 68 and the wax sheet 52 is further hardened.

Next, the laminated body 58 is guided to the die-cutting device 100 and die-cut into a predetermined shape. In this embodiment, since it is used for the occlusal force diagnosis sheet 28, it is die-cut into a horseshoe shape slightly larger than the pressure sensitive sheet 22. While the die cutting is performed intermittently, the wax sheet manufacturing apparatus 50 is used.
Is a continuous operation, it is necessary to make a play of the laminated body 58 between the wax sheet manufacturing apparatus 50 and the die cutting apparatus 100.

However, since the laminated body 58 has the wax sheet 52, when the radius of curvature becomes too small, the hardened wax sheet 52 breaks. Therefore, in this embodiment, both devices 5
The light emitting / receiving elements 102 and 104 for detecting the lower edge of the play portion of the laminated body 58 are provided between 0 and 100. Then, the conveying speed of the die-cutting device 100 is made higher than the carrying-out speed of the wax sheet manufacturing apparatus 50, and the light receiving element 104 makes the laminated body 58.
When the slack above a certain level is detected, the die cutting device 100 is activated, and when the slack is insufficient, it is stopped.

The die-cutting device 100 has an appropriate number of conveying rollers 106, 108, 110, 1 for feeding the laminate 58 substantially horizontally.
12, the die-cutting blade 114 and the pedestal 116 provided between the two transport rollers 108 and 110, and the transport roller 1
And a stacker 118 provided between 10 and 112. The die-cutting blade 114 is vertically moved by, for example, the eccentric cam 120 to punch the horseshoe-shaped molded product 58A from the laminated body 58.

As shown in FIGS. 4 and 5, the die-cutting blade 114 has a blade (so-called big blade) 114A protruding in a thin plate shape along the outer shape of the molded product 58A and a portion surrounded by the blade 114A. And a sponge 114B attached thereto. An appropriate number of these are arranged side by side in the width direction of the laminated body 58. The lower surface of the sponge 114B projects below the blade 114A.

Therefore, the die cutting blade 114 is used as the eccentric cam 12.
When it is lowered by the rotation of 0, the sponge 114B first presses the laminated body 58 and holds it between the pedestal 116 and the laminated body 58.
Then, the blade 114A cuts out the horseshoe-shaped molded product 58A from the laminated body 58 and then returns upward. At this time, the sponge 114B presses the molded product 58A. For this reason, the wax sheet 52 itself has a viscosity, so that the molded product 58A has a laminated body 58A.
Never fall out of.

The stacker 118 is die-cut to obtain a laminated body 58.
It has a punching die 118A that pushes up the molded product 58A adhering to it from below, and a rack 118B that holds the pushed up molded product 58A in order from the bottom. As a result, as shown in FIG. 6, a molded product 58A in which the wax sheet 52A having a constant thickness is sandwiched between the release sheets 54A and 56A is completed.

Remaining laminate 5 obtained by die-cutting the molded product 58A
8B is sent above the wax recovery tank 122 in a substantially vertical direction, where the release sheets 54B and 56B are separated in a substantially horizontal direction, and recovery reels 124 and 126, respectively.
To be wound up. At this time, the wax sheet 52B sandwiched between the two release sheets 54B and 56B is sufficiently cooled and becomes brittle. Therefore, the wax sheet 52B is separated from the two release sheets 54B and 56B and dropped while being broken, and the recovery tank 122 Will be collected. The wax collected here is returned to the wax tank 78 for use.

The molded product 58A thus produced is
One of the release sheets 54A or 56A is peeled off, and the exposed wax sheet 52A is laminated and adhered on a pressure sensitive sheet 22 prepared separately in advance as shown in FIG. Figure 8
A wax sheet 52A is adhered to both surfaces of the pressure sensitive sheet 22 to form wax layers 24 and 26. In FIG. 9, a wax sheet 52A is adhered to one surface of the pressure sensitive sheet 22 to form a wax layer 24.

The adhesion is performed here by utilizing the viscosity of the wax sheet 52A itself, and no adhesive is required. Note that FIG.
In this case, the molded product 58A is made slightly larger than the pressure-sensitive sheet 22, and the wax sheets 52A, 52A on both sides are adhered to each other by the wax. Since the wax layers 24 and 26 are thus covered with the release sheets 54A and 56A, the release sheets 54A and 56A can protect the wax layers 24 and 26. When using the occlusal force diagnostic sheet, the release sheets 54A and 56A are used.
Can be easily peeled off.

In this embodiment, a wax sheet to be attached to both sides or one side of the occlusal force diagnostic sheet 28 is manufactured, but the present invention is not limited to this. The molded product cut out into a predetermined shape can be used for various purposes.

[0037]

As described above, according to the first aspect of the present invention, the lower release sheet is conveyed horizontally, and the molten wax is supplied on the lower release sheet in a substantially constant thickness, and the wax is cooled while being cooled. Since the upper release sheet is superposed on the upper release sheet and solidified while keeping the space between both release sheets constant, the wax sheet can be controlled to a constant thickness with high accuracy.

According to the second aspect of the invention, a manufacturing apparatus directly used for carrying out the invention of the first aspect can be obtained. Here, it is desirable that the surface temperature of the horizontal table is controlled by a heater or cooling water (claim 3). Further, after supplying the molten wax, in order to prevent wrinkles from being generated in the lower release sheet, rollers are brought into rolling contact with both side edges of the release sheet, and the rolling surfaces of these rollers make the outer edge of the feeding direction oblique. It is desirable to provide so that (Claim 4).

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a perspective view of a part thereof.

FIG. 3 is a plan view of the same.

FIG. 4 is an enlarged sectional view of a die cutting blade.

FIG. 5 is a view showing a blade die of a die-cutting blade which is divided by the line VV.

FIG. 6 is a cross-sectional view of a cut-out molded product.

[Fig. 7] Exploded view of an occlusal force diagnostic sheet using this

FIG. 8 is a sectional view showing the structure.

FIG. 9 is a diagram showing an example of the structure of many.

[Explanation of symbols]

 22 Pressure Sensitive Sheet 24, 26 Wax Layer 28 Occlusal Force Diagnostic Sheet 50 Wax Sheet Manufacturing Device 54, 56 Release Sheet 58 Laminate 58A Molded Product 60, 62, 64 Lower Conveying Roller 66, 68 Horizontal Stand 70 Wax Nozzle

Claims (4)

[Claims] 1. A method for continuously producing a wax sheet having a constant thickness, wherein molten wax is continuously supplied at a substantially constant thickness to the upper surface of a lower release sheet which is conveyed substantially horizontally at a constant speed. While the lower release sheet is conveyed substantially horizontally, the molten wax is gradually cooled, and the gradually cooled wax is conveyed at the same speed while maintaining a constant distance from the lower release sheet. A method for producing a wax sheet, comprising stacking an upper release sheet and carrying out wax by sandwiching the wax between the upper and lower release sheets. 2. An apparatus for continuously producing a wax sheet having a constant thickness, wherein at least two lower conveying rollers convey the lower release sheet substantially horizontally and at a constant speed, and these two lower conveying rollers. A horizontal table that holds the lower release sheet substantially horizontally from below, and a wax nozzle that supplies molten wax to the lower release sheet from the vicinity of the upstream end of the horizontal table at a substantially constant thickness. An apparatus for manufacturing a wax sheet, comprising: the lower transport roller on the downstream side; and an upper transport roller that superimposes an upper release sheet on the lower release sheet at the same speed while keeping a constant interval. 3. The wax sheet manufacturing apparatus according to claim 2, wherein the surface temperature of the horizontal table is controlled. 4. A pair of rollers are mounted on the upper surface of the horizontal base so as to be in rolling contact with both edges of the lower release sheet in a state where the rotating surface is oriented obliquely to the outer edge of the lower release sheet in the feeding direction. The wax sheet manufacturing apparatus according to claim 2 or 3.