KR930011846A - Continuous manufacturing method of three-dimensional decorative molded article and its manufacturing apparatus - Google Patents

Abstract

In a typical apparatus for continuously producing three-dimensional decorative moldings in which an endless belt-line production system is used with a plurality of three-dimensional decorative flexible molding dies arranged in series, a specific two-step Improved methods and apparatus have been disclosed for continuously manufacturing three-dimensional decorative moldings of various shapes in which moldings, namely spray molding through spray nozzles and discharge molding through discharge nozzles, are employed. According to the two-stage molding technique, a good quality article is obtained in a simple manner, such that there are no pinholes on the surface and no bubbles inside.

Description

Continuous manufacturing method of three-dimensional decorative molded article and its manufacturing apparatus

As this is a public information case, the full text was not included.

1 is an explanatory view showing a typical example of a known conventional device for the continuous production of three-dimensional decorative moldings.

2A is an explanatory diagram showing one example of the apparatus of the present invention for filling a moldable material fluidized into a molding die by spray molding without using a pressure chamber.

2B is an explanatory view showing another example of the apparatus of the present invention for filling a moldable material fluidized into a molding die by spray molding in an open pressure chamber.

FIG. 2C is an explanatory view showing another example of the device of the same type as shown in FIG. 2B except that the pressure chamber has a rigid outer frame.

FIG. 3A is an explanatory view showing a state in which the moldable material is injected into the molding die shown in FIG. 2A.

FIG. 3B is an explanatory view showing a state in which the moldable material is injected into the expanded die in the pressure chamber shown in FIG. 2B.

FIG. 3C is an explanatory view showing a state in which the encapsulating material is injected into the expanded molding die in the pressure chamber having the rigid outer frame in FIG. 2C.

Claims (10)

A series of steps is accomplished by (a) filling a preheated elastic molding die having a molding die with fluidized moldable material through a nozzle extending from a depot of the moldable material, and (b) adjusting the temperature. Solidifying the fluidizable moldable material in the molding die, (c) releasing the solidified molding from the molding die by applying superatmospheric pressure to the back side of the molding die, and (d) preheating the molding die for subsequent processing. In a method for the continuous manufacture of a three-dimensional decorative molding which is made of a cycle of the thing, step (a) is carried out by firstly dispensing a smaller portion of fluidized moldable material and / or material miscible through the spray nozzle. Evenly spray the inner surface of the part and then hold the die part with a sufficient portion of fluidized moldable material through a dosing nozzle connected to the reservoir. Improved method, characterized in that is carried out by. The method of claim 1, wherein step (a) expands the flexible molding die outwards to an enlarged size by applying a low atmospheric pressure to the back of the die or by applying a superatmospheric pressure to the interior of the molding die, The fluidized moldable material and / or material miscible with it are evenly sprayed onto the inner surface of the die portion through a spray nozzle, and the die is resized to its original size by bringing the pressure at the back or inside of the molding die to atmospheric pressure, And then filling the die portion with a sufficient portion of fluidized moldable material through a discharge nozzle connected to the reservoir. 3. The molding die according to claim 2, wherein the molding die is externally supported at its rear side with the same outer frame in size and structure as the die portion enlarged by expansion according to the enlarged decoration of the die before injection. How to improve. The method of claim 1, wherein a small portion of fluidized moldable material and / or material miscible therewith is first sprayed through the spray nozzle onto the inner surface of the die portion to form a thin film of the sprayed material on the inner surface, and then And a sufficient portion of fluidized moldable material is introduced into the die portion through the discharge nozzle. The material of claim 1, wherein the spray nozzle has a main body provided with an air-pipe connected to an air pump and equipped with a supply pipe equipped with a metering device, and has a quantity of fluidized moldable material and / or miscible with it. The improvement method characterized in that the injection with the compressed air. 2. The method according to claim 1, wherein the method is adjusted within a range of angles [theta] rk 5-35 [deg.] Formed by an edge of the base of the die and a horizontal line across the narrowest portion squeezed into the annular portion of the die. An endless belt-line system continuously provided with a plurality of elastically flexible molding die each having a die portion, an apparatus for filling fluidized moldable material into each preheated molding die from a reservoir of fluidized moldable material, A solidification apparatus for solidifying the fluidized moldable material by controlling the temperature, a mold-releasing apparatus equipped with a pressure-regulating apparatus for externally applying superatmospheric pressure to the rear of each molding die, and a preheating apparatus for the molding die. 3. A device for the continuous production of three-dimensional decorative moldings comprising: and a power unit for driving a belt-line system, the apparatus for filling fluidized moldable materials by spray molding. Soup capable of forming a thin film of the fluidized moldable material of the part and / or material miscible with it Wherein it provided in the nozzle and a discharge nozzle which is disposed below the fray nozzle extending from the reservoir to the fluidized chaeulsu a moldable material of a sufficient portion to discharge the molding die portion. 8. The apparatus of claim 7, wherein the device for filling the moldable material is further capable of applying a low atmospheric pressure externally to the rear of the molding die during spray molding or applying a superatmospheric pressure inside the molding die and during discharge molding. And a pressure chamber capable of bringing the pressure at the back or inside of the molding die to atmospheric pressure. 9. An apparatus according to claim 8, wherein the pressure chamber is provided therein with an outer frame that is identical in size and structure to the die portion enlarged by expansion according to the enlarged decoration of the die. 2. The discharge nozzle of claim 1, wherein the discharge nozzle extends from the depot through a reservoir equipped with a metering device while the spray nozzle comprises an air pipe connected to an air pump and a supply pipe equipped with the metering device. Apparatus characterized in that it has a main body. ※ Note: This is to be disclosed by the original application.