JPS59225108A - Method and apparatus for preparation of multicolored stick cosmetic - Google Patents

Abstract

PURPOSE:To manufacture a stick cosmetic having clear spiral woodgrain pattern on the surface, with a few steps in high productivity, by melting two kinds of plain colored base raw materials in respective compounding tanks, and filling the materials through the pipes attached at the bottom of the tanks directly into a mold for the forming of stick cosmetic. CONSTITUTION:Two kinds of plain colored base raw materials are compounded and melted in a pair of compounding tanks 1, 2 each having a pipe 3 connected its top to the tank, and are charged directly into the mold 4 placed rotatably under the pipes 3. The materials are then heated, cooled, and aged by conventional methods, and the solidified product is released from the mold 4. The spiral woodgrain pattern can be obtained most clearly by rotating the mold at 250- 400rpm. A stick cosmetic having excellent product characteristics such as the resistance to discoloration, degradation of odor, decompositon of oil components, etc. can be produced by controlling the temperature of the compounding tanks according to the viscosity of each plain colored base raw material.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for producing a multicolored cosmetic bar, such as a lipstick, whose surface exhibits a wood-like spiral pattern in which a plurality of colors are unevenly mixed. be.

Conventionally, in order to obtain such multicolored rod-shaped cosmetics, wax, oil, coloring pigment, fragrance, and fine silica powder (2 to 10%) were used.
After composition and solidification of the basic raw materials of each monochrome including (weight ratio), these are compression molded using a press or the like, or each monochrome is blended and melted in a pair of blending tanks a and b as shown in Figure 1. The basic raw materials of each color are transferred into a rotating hopper C installed below through conduits a'+b'Y connected to mixing tanks a and b, respectively, and the basic raw materials of each monochrome are fed into the rotating hopper C. After being mixed in a layer, the mixture is injected and filled from the spout d of the rotary hopper C into the molding hole f of the bar-shaped cosmetic molding mold e installed below the rotary hopper C to form the mold.

Therefore, as mentioned above, in the case where the basic raw materials of each single color are composed and then compression molded using a press etc., the woodgrained spiral pattern formed by the basic raw materials of each single color is color-coded. Although it has the advantage that the boundaries of each color layer are very clearly visible, it has the disadvantage of having a large number of steps and low productivity because the basic raw materials for each single color must be composed and assimilated in advance. In addition, as shown in Figure 1, conduits a' and b connect the basic raw materials of the valley monochromatic color blended and melted in a pair of blending tanks a and b to the blending tanks a and b, respectively. 'The basic raw materials of each monochrome are introduced into the rotating hopper C installed below the via, and after being mixed in layers in this rotating hopper C, from the spout d of this rotating hopper C, When molding is performed by injecting and filling into the molding hole f of the rod-shaped cosmetic mold e installed in the rotary hopper C, these Pinholes are likely to form in the filled and molded bar-shaped cosmetics due to the entrainment of air in the basic raw materials, and as a result of the basic raw materials being kept at a constant temperature being absorbed by the rotating hopper C, the basic raw materials must be maintained at a fairly high temperature of around 100°C, which may cause changes in the color tone of each basic raw material, deterioration of odor,
If oil decomposition occurs and the product characteristics of the obtained bar-shaped cosmetic are lost, there is a disadvantage of C.C. and corrosion. The boundaries of the swirl-shaped, color-coded valley color layers that appear on the surface of the molded bar-shaped cosmetic become unclear.
This had the disadvantage of lowering the product value.

In view of these conventional drawbacks, the present invention has developed a rod-shaped material rotatably installed below a pair of mixing tanks, through which each monochromatic basic raw material is mixed and melted in a pair of mixing tanks via conduits connected to the mixing tanks. By directly filling the mold for molding cosmetics, productivity is improved and pinholes are avoided.
It is possible to obtain a product with high commercial value without losing the properties of the bar-shaped cosmetic, and in which the boundaries of the swirl-patterned color-coded valley color layers that appear on the surface of the filled-molded bar-shaped cosmetic are extremely clear. Its purpose is to

Hereinafter, a drawing of an actual example of the manufacturing method of the present invention will be explained.As shown in FIG.
The monochromatic basic raw materials /a, /b7 are blended and melted in the mixing tank, and a rod-shaped cosmetic molding mold rotatably installed below the conduit 3V is connected to the mixing tank at its upper end. After that, both basic raw materials /a and /b filled in this rod-shaped cosmetic mold are heated by a known method.
After being cooled and cured to solidify, it is devolatilized from a mold for molding rod-shaped cosmetics, and as shown in FIG.
A multicolored bar-shaped cosmetic 7y with a wood-like swirl pattern and texture with unevenly mixed colors on the surface consisting of b! 'You get it.

In the figure, ``S'' indicates a control valve that controls the flow rate of the basic raw material /al/b installed in the pipe line of the conduit 3, and ``B''...
・ is the same (each basic raw material/a arranged in the pipeline path of conduit 3)
,/b'a? It is a pressurized pump for pressure-feeding a fixed amount, and there is no particular restriction on the rotation speed of the rod-shaped cosmetic mold that is installed freely, but according to the results of actual tests,
When rotating at approximately 250rpm to 4UOrpm,
As shown in Fig. 3, on the surface of the filled and molded multicolored rod-shaped cosmetic material 7, a woodgrain swirl pattern consisting of monochromatic basic raw materials ia and ib, mixed unevenly, is most clearly visible. It turns out that it appears.

In this way, the present invention provides a pair of blending tanks/2 for mixing and melting of each monochromatic basic raw material/a,/b, each of which has its upper end connected to said blending tank/2 via a conduit 3. Since it is directly filled into the I-shaped cosmetic mold which is designed to be freely rotatable below the base, after the basic raw materials of valley monochromatic color are composed and solidified, they are It can be compressed and formed using a press, etc., or it can be mixed and formed in a pair of mixing tanks.
'r I & the basic raw materials of each single color + 2 are introduced into the rotating hopper through the conductor connected to the mixing tank respectively, and the single color is introduced into the rotating hopper in the rotating hopper. The number of steps is smaller compared to methods such as mixing the basic raw material f-+ in a layer and then injecting it into the molding hole of a bar-shaped cosmetic mold installed below from the spout of a rotating hopper. It is possible to reduce the time required for molding by a large amount and improve productivity by a large amount.

In addition, the present invention uses a rotating hopper and does not cause air to be drawn in, unlike in the case where monochromatic basic raw materials are mixed in a layered manner. The basic raw materials kept at a temperature of Filling and molding can be performed while maintaining the optimum temperature for filling around °C, making it possible to obtain multicolored bar-shaped cosmetics with excellent product characteristics without changing color tone, deterioration of odor, or decomposition of oil content, as well as basic raw materials for each single color. By rotating a rod-shaped cosmetic mold that is filled directly through a conduit, a woodgrain swirl pattern in which multiple colors are unevenly mixed is obtained. When monochromatic basic raw materials are mixed and filled in layers in a hopper, the boundaries between the color-coded layers of the wood-grained spiral pattern that appear on the surface of the formed bar-shaped cosmetic become unclear. This has the advantage that a highly commercially valuable multicolored cosmetic bar with a clear woodgrain swirl pattern χ on the surface can be obtained, and the equipment can be simplified by omitting the rotating hopper, reducing equipment costs. It is also possible to promote cost reduction of products that are filled and molded.

[Brief explanation of the drawing]

FIG. 1 is a process diagram showing a conventional manufacturing method, FIG. 2 is a process diagram showing a manufacturing method of the present invention, and FIG. 3 is a front view of a bar-shaped cosmetic obtained by the present invention. /1.2...Blending tank, /a, /b...Basic raw materials, 3...Conduit, Ri...Mold for molding rod-shaped cosmetics. Patent applicant Shiseido Co., Ltd.

Claims (2)

[Claims] (1) A pair of mixing tanks /, each monochrome basic raw material /a, /b mixed and melted in 2 was rotatably installed below the mixing tank via a conduit 3 whose upper end was connected to the mixing tank. A method for producing a multicolor bar-shaped cosmetic, characterized by directly filling a bar-shaped cosmetic molding mold t. (2) A pair of blending tanks/, 2 for blending and melting the basic raw materials /a, /b of each single color, a conduit 3 connected to the blending tank at each upper end, and a rod-shaped pipe rotatably installed below the conduit 3. An apparatus for use in the manufacturing method according to claim 1, comprising a mold for molding cosmetics.