JPH0829634B2 - Marker manufacturing equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marker manufacturing apparatus for automatically manufacturing a marker capable of erasing a written character.

[0002]

2. Description of the Related Art Generally, in a conventional marker, an operation of pouring a raw material obtained by melting and mixing a wax and a pigment into a molding box and taking out a solidified marker is manually performed.

[0003]

However, in the above-described conventional manual marker manufacturing, the work efficiency is poor, and it is difficult to control the temperature of the raw material, and a so-called "nest" may be formed. However, the shrinkage rate was high and "shrinkage" occurred, and it was difficult to make the product uniform. Further, there is a defect that the raw material is separated due to a difference in specific gravity between the wax as the main raw material and the pigment for coloring when the stirring is insufficient or the time is too long.

The object of the present invention was made in view of the above-mentioned conventional drawbacks, and it is an object of the present invention to provide a marker manufacturing apparatus capable of fully automatically manufacturing a homogeneous marker having no "shrink" or "nest". It is in.

[0005]

The marker manufacturing apparatus according to the present invention has a pouring box for storing the melted raw material while heating it, and an injection cylinder for pouring the raw material of the pouring box into the mold. A raw material injection part, a plurality of molding boxes attached to a mold rotatably supported around a shaft, a heating mechanism for heating the molding boxes, and a cooling mechanism for cooling the molding boxes,
A product take-out mechanism for taking out a plurality of products from a molding box at the same time. Further, the raw material injecting section may be provided with an intermediate hot plate, the lower end of the raw material injecting section may be provided with a cutter, and the product removing mechanism may be provided with a product receiver.

[0006]

According to the marker manufacturing apparatus of the present invention, the solidified product can be automatically taken out by the product taking-out mechanism by pouring a predetermined amount of the raw material into the raw material pouring section.

[0007]

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view showing a marker manufacturing apparatus according to an embodiment of the present invention, and FIG. 2 is a side view showing the marker manufacturing apparatus.

The marker manufacturing apparatus according to the present invention has a pouring box 11 for holding the raw material melted and stirred by a melter (not shown) while heating it with a heater 10. Also, pouring box 1
1 is supported by a cylinder 12, one end of which is fixed to the main body of the apparatus, so as to be vertically movable. Inside the pouring box 11, a plurality of pouring cylinders 13 are provided at predetermined intervals, and the nozzle portion 14 of the pouring cylinder 13 projects downward from a hole formed in the bottom plate of the pouring box 11. .

An injection port 15 for taking in the raw material is formed at the lower end of the injection cylinder 13, and an overflow port 16 for discharging the extra raw material is provided at the upper end. The upper end of the injection cylinder 13 is fixed to the cylinder fixing plate 17 with a nut 18. In the inner cylinder of the injection cylinder 13,
Pouring valve 1 where tip small diameter portion 19a reaches the lower end of nozzle 14
9 is inserted, and the tip of the pouring valve 19 is fixed to the pouring valve drive plate 20 with the nuts 21 and 21 via the spring 22.

The pouring valve drive plate 20 is connected to an elevating cylinder 24 fixed to a frame 23 standing upright from the pouring box 11, and by driving the elevating cylinder 24, the pouring valve 19 is moved up and down. You can move.

The molding box 25 has a motor 42 centered on the shaft 26.
A plurality of molds 27 are rotatably supported on the mold 27. A large number of molding pipes 28 for forming markers are formed in the molding box 25 at positions corresponding to the nozzle portions 14 of the injection port 15.

An intermediate hot plate 29 is arranged between the pouring box 11 and the molding box 25. The intermediate hot plate 29 has an A layer 29a, a B layer 29b, and a heater having a heater 30 therein. And a C layer having no. Also, the intermediate hot plate 2
A hole 31 is formed at a position corresponding to the molded pipe 28 of No. 9, and a drain gutter 32 is arranged in the hole 31.

As shown in FIG. 6, the sink gutter 32 is composed of a cylindrical holding ring portion 32a and an obliquely inclined gutter portion 32b, and is detachably mounted in the hole 31.

The heat cutter 33 is disposed below the pouring box 11 and is composed of a blade 33a and a drive cylinder 33b, and scrapes off excess stock solution. The scraped part is
It is received by the tray 33c.

The heating mechanism 43 heats and holds the inside of the molding pipe 28 with hot water, and the cooling mechanism 34 heats the molding pipe 28.
Is cooled with circulating water.

The product take-out mechanism 35 includes a drive cylinder 3
A plurality of take-out pins 37 driven by 6 simultaneously push out the product from the forming pipe 28 of the forming box 25 and receive the product by the receiving box 38.

The control unit 39 controls each drive cylinder, rotation of the mold 27, various control valves, and the like, and is provided with an operation panel 40 on the front of the main body of the apparatus.

Next, the operation of the marker manufacturing apparatus configured as described above will be described. First, a low melting wax is melted by a melting machine (not shown). The set temperature is about 120 to 150 degrees C, but is adjusted depending on the amount of dissolution. On the other hand, since the wax is colored by a kneader (not shown), the wax containing the metal oxide and the like is gently stirred while being heated. Stir until the dispersion of the particles can be confirmed, and transfer the marker stock solution for dilution already dissolved in the dissolver by the pump while continuing heating.

The mixed stock solution is transferred to a warmer (not shown) by a pump. Also in the heat retainer, continue heating and stirring in the same manner to maintain the mixed state. The undiluted solution in the warmer is pressure-fed to the pouring box 11 of the apparatus body by a heated gear pump.

The pouring box 11 is rotatable 8 in this embodiment.
Among the individually formed molding boxes 25, the cylinders 12 are driven to approach and approach the molding boxes located directly below. This time,
As shown in FIG. 5, the nozzle portion 14 of the pouring valve 19 is located inside the hole 31 of the intermediate hot plate 29, and the forming pipe 28 of the forming box 25 is located below it. When the lifting cylinder 24 moves up,
The pouring valve 19 is instantly opened, and the required amount of undiluted solution is added to the intermediate hot plate 2.
9. Fill the molded pipe 28 through the flow gutter 32.
After the filling, when the elevating cylinder 24 lowers the pouring valve drive plate 20, the pouring valve 19 is closed.

During the injection of the undiluted solution, the function of the sink gutter 32
Since the flow is not along the vertical direction but along the inner wall surface of the molded pipe 28, bubbles are not entrained and turbulent flow can be suppressed. Therefore, welds are unlikely to occur.

The molding box 25 is heated to a constant temperature by the heating mechanism 43 in order to improve the "skin" or "strength" of the product. The temperature rise temperature is determined in consideration of the outside air, and is set to, for example, 30 to 40 degrees Celsius. By making the temperature of the molding pipe 28 constant before the injection, the injection amount of the stock solution can be made constant.

After the stock solution is poured into the molding pipe 28, the periphery of the molding box 25 is cooled. However, since the heater 30 of the intermediate hot plate 29 located between the pouring box 11 and the forming box 25 is still energized, the stock solution in the hole 31 is kept warm. The hole 31 serves as a pool for the molten metal and forms the molding box 2
When shrinkage occurs while molding and shrinking in No. 5, the shrinkage is replenished. Further, the undiluted marker solution in the hole 31 also serves as a feeder. Therefore, the stock solution is always replenished in the molding pipe 28 of the molding box 25. For this reason, it is possible to prevent "shrink" and "nest" from occurring in the product.

When the marker is cooled and solidified in the molding box 25, the pouring box 11 is raised by the cylinder 12 which is a drive mechanism, and at the same time, the intermediate hot plate 29 is also raised. At this time, the undiluted marker liquid in the holes 31 of the intermediate heating plate 29 is left on the molding box 25 in a raised state. The raised portion on the molding box 25 is pressed by the heat cutter 33 while being melted. The pressed member is the saucer 33
Recovered by c.

When the excess portion is scraped off by the heat cutter 33, the molding box 25 rotates about the shaft 26 and reaches the product take-out mechanism 35. When the molding box 25 reaches the position of the product take-out mechanism 35, the receiving box 38 advances and stands by.

When the drive cylinder 36 moves forward in response to a signal from the controller 39, the take-out pins 37 are inserted into the molding pipes 28 of the molding box 25, respectively. Take-out pin 37
As the product advances, the marker 41, which is a product, is received in the receiving box 3.
It is extruded into 8. The above is one cycle of the marker manufacturing process, and this process is sequentially repeated.

As described above, the marker manufacturing apparatus of the present invention can manufacture the markers fully automatically. The marker manufacturing apparatus according to the present invention is not limited to the above embodiment, and various modifications can be made.

[0028]

As described in detail above, the marker manufacturing apparatus of the present invention comprises a pouring box for heating and storing the melted raw material, and an injection cylinder for pouring the raw material of the pouring box into the mold. A raw material injecting section, a molding box attached to a plurality of molds rotatably supported around a shaft, a heating mechanism for heating the molding box, and a cooling mechanism for cooling the molding box, A product take-out mechanism for taking out a plurality of products from a molding box at the same time, an intermediate hot plate in the raw material injecting section, a cutter at the lower end of the raw material injecting section, and a product receiver in the product taking out mechanism, The process from injection to removal of the solidified product can be performed automatically, and the work efficiency can be improved without forming a nest in the product or separating the raw material. Also, the "skin" of the marker can be made beautiful and the strength can be made constant.

[Brief description of drawings]

FIG. 1 is a front view showing a marker manufacturing apparatus according to an embodiment of the present invention.

FIG. 2 is a side view showing the marker manufacturing apparatus.

FIG. 3 is a main-portion cross-sectional view showing a raw material injecting unit of the marker manufacturing apparatus.

FIG. 4 is a main-portion cross-sectional view showing an injection cylinder in a raw material injection unit of the marker manufacturing apparatus.

FIG. 5 is an explanatory view showing an injection state of an injection cylinder in a raw material injection section of the marker manufacturing apparatus.

FIG. 6 is a perspective view showing a sink gutter in a raw material injecting section of the marker manufacturing apparatus.

[Explanation of symbols]

 10 Heater 11 Pouring Box 12 Cylinder 13 Injection Cylinder 14 Nozzle Part 15 Pouring Port 16 Overflow Port 17 Cylinder Fixing Plate 18 Nut 19 Pouring Valve 20 Pouring Valve Drive Plate 21 Nut 22 Spring 23 Frame 24 Lifting Cylinder 25 Forming Box 26 Shaft 27 Formwork 28 Molded Pipe 29 Intermediate Heat Plate 30 Heater 31 Hole 32 Flow Trough 33 Heat Cutter 34 Cooling Mechanism 35 Product Extraction Mechanism 36 Drive Cylinder 37 Extraction Pin 38 Receiving Box 39 Control Section 40 Control Panel 41 Marker 42 Motor 43 Heating Mechanism

Claims (4)

[Claims] 1. A pouring box for storing the melted raw material while heating it, a raw material pouring section having an pouring cylinder for pouring the raw material of the pouring box into a mold, and a rotatably supported shaft. A plurality of forming boxes attached to the formed mold, a heating mechanism for heating the forming boxes, a cooling mechanism for cooling the forming boxes, and a product taking-out mechanism for simultaneously taking out a plurality of products from the forming boxes. A marker manufacturing device characterized by the above. 2. The marker manufacturing apparatus according to claim 1, wherein the raw material injecting section is provided with an intermediate heating plate. 3. The marker manufacturing apparatus according to claim 1, wherein a cutter is provided at a lower end of the raw material injecting section. 4. The marker manufacturing apparatus according to claim 1, wherein the product takeout mechanism includes a product receiver.