JP4737963B2 - Soap mold and manufacturing equipment - Google Patents

Description

  The present invention relates to a soap mold and a soap manufacturing apparatus including the same.

  The present applicant has previously proposed a device for injecting and solidifying molten soap containing bubbles from below the mold as a soap production device containing countless bubbles dispersed (for example, Patent Document 1 below). reference).

  By the way, the surface of the soap is given a sign such as a logo for the product name in order to enhance the product identification, or a decoration to enhance the consumer's willingness to purchase. In order to attach such an indicia or decoration, it is necessary to provide uneven portions corresponding to these on the cavity forming surface of the soap mold, but depending on the form of the sign or pattern, A portion surrounded by the convex portion was formed, and the melted soap was not filled in this portion, and there was a problem that marks and decorations were difficult to be accurately transferred to the surface of the obtained soap. Further, even when the molten soap is filled in the portion surrounded by the convex portion, when the solidified soap is taken out from the mold, the surrounded portion is in a state close to a vacuum. For this reason, when the soap is removed, the solidified soap is lost at the portion surrounded by the projections, resulting in a defective product.

  On the other hand, the present applicant has provided a slit in the cavity forming surface of the soap mold, and sucks the soap whose volume is shrunk due to the external solidification through the slit, or blows a gas on it to release it. A method for producing soap that has been molded and that successfully delivers soap after molding has been proposed (see Patent Document 2 below). However, this technique is configured for the purpose of improving the delivery of the solidified soap, and cannot be applied as it is as a means for solving the above problems.

  In addition, when pouring molten soap into the mold, a mold that uses a porous material to evacuate part or all of the mold material in order to reliably replace the air in the cavity with the molten soap. Has been proposed (Patent Document 3 below). However, if a porous material is used for the entire mold material, it is not economical, and the mechanism for preventing the cooling water of the mold from leaking to the surface of the cavity forming surface becomes complicated. In addition, since it is difficult to process with a low surface roughness using a porous material, if this material is used only for the logo mark part, the surface roughness of the logo mark and its surroundings will be different and the resulting soap surface will be uniform. Disappear. Further, since it is difficult to obtain a mold having a high-precision logo mark, the accuracy of the soap logo mark obtained is inevitably low. Furthermore, since the pore diameter of the porous material is as small as 5 to 50 μm, it is difficult to completely remove the melted soap if these pores are clogged, and the expected effect cannot be obtained.

JP 2004-2717 A JP 2003-277799 A JP-T-2001-525881

  Accordingly, an object of the present invention is to provide a molding die capable of producing a soap with a mark and decoration on its surface with high accuracy, and a soap production apparatus including the same.

  The present invention is a soap mold in which a set of split molds are assembled to form a cavity therein, and corresponds to the markings and decorations attached to the surface of the soap in the cavity forming surface of the split mold The above object is achieved by providing a soap mold in which a convex portion is provided and a vent hole is provided in a portion surrounded by the convex portion.

  The present invention also provides a soap production apparatus comprising the soap mold of the present invention, an injection device for injecting molten soap into the mold, and a mold unit for opening and closing the mold. This achieves the object.

  According to the present invention, it is possible to produce a soap with a marking or decoration on its surface with high accuracy.

The present invention will be described below based on preferred embodiments with reference to the drawings.
The soap mold 1 shown in FIG. 1 is composed of a pair of split molds 1A and 1B. Each split mold has a rectangular block shape made of a rigid body such as metal, and concave cavity forming surfaces 11 </ b> A and 11 </ b> B are formed at the respective central portions. The formation surfaces of the cavities (hereinafter also referred to as cavity formation surfaces) 11A and 11B match the shape of the soap to be manufactured when the split mold 1A and the split mold 1B are combined with their parting surfaces PL. A cavity (not shown) having the shape described above is provided. The cavity forming surfaces 11A and 11B have a shape with no undercut portion.

  In the split mold 1A, a conventional gate 12A having a cross-sectional shape in which a part of a circle is cut out along the parting surface PL is formed on a part of the parting surface PL. One end of the gate 12A opens at the end surface E of the split mold 1A, and the other end opens at the cavity forming surface 11A. A gate pin P that is complementary to the gate 12A is inserted into the gate 12A. The gate pin P is made of a material such as metal or plastic, and is slidably arranged in the gate 12A. In the split mold 1B, a nozzle insertion hole 12B that penetrates the split mold 1B in the thickness direction is formed in the outer edge portion of the cavity forming surface 11B. The diameter of the nozzle insertion hole 12B gradually expands toward the back side of the split mold 1B. The nozzle insertion hole 12B and the gate 12A form a communication path that reaches the cavity from the nozzle insertion hole 12B through the gate 12A when the split mold 1A and the split mold 1B are brought into contact with each other at their parting surfaces PL. Each is formed in such a position. As will be described later, a nozzle for injecting molten soap is inserted into the nozzle insertion hole 12B, and the molten soap is injected into the cavity through this communication path. An air vent 13A is provided on the parting surface PL of the split mold 1A at a position facing the gate 12A via at least the cavity forming surface 11A. The air vent is not limited to the split mold 1A, but can be installed in the split mold 1B, or can be installed in the split molds 1A and 1B. Although not shown, a cooling water circulation path is provided in the blocks constituting the split molds 1A and 1B.

The cavity forming surface 11A is provided with convex portions 110 corresponding to indicia and decorations attached to the soap surface. The mold 1 is used with the split molds 1A and 1B arranged vertically so that the end face E of the split mold 1A is the bottom surface. As will be described later, molten soap is injected from below through the communication path and fills the cavity. If there is a portion surrounded by the convex portion 110 on the cavity forming surface 11A, the air in this portion is melted into the soap. As a result, the markings and decorations on the surface of the resulting soap were difficult to transfer with high accuracy. In particular, the transfer failure was remarkable when the injection time was less than 5 seconds, particularly less than 3 seconds, and the viscosity of the molten soap at the time of injection was 100 mPa · s or more. Moreover, since the part enclosed by the said convex part 110 will be in the state close | similar to a vacuum at the time of mold removal, the chip | tip was solidified. In particular, in the case of a soap containing a myriad of bubbles dispersed as described later and in the case of a soap containing a large amount of water of 25% by weight, the strength of the soap is relatively low, which is remarkable. Further, when the height of the convex portion 110 is 0.8 mm or more, particularly 1.0 mm or more from the base portion of the cavity forming surface, and the enclosed portion is 40 mm ² or less, particularly 20 mm ² or less, transfer failure or breakage is remarkable. It became. As a result of the study by the present inventors, by providing the air hole 111 in the portion surrounded by the convex portion 110, the molten soap is filled in the portion surrounded by the convex portion 110, and the shape of the convex portion becomes the soap with high accuracy. As well as being transferred, it was found that damage during demolding can also be prevented. The mold 1 is deaerated from the air vent 13A in addition to the vent hole 111 in a state where the split molds 1A and 1B are in contact with each other.

  Hereinafter, the vent 111 will be described with reference to a diagram illustrating a state in which the split mold 1A is viewed from the cavity forming surface side. In addition, the part enclosed by the convex part 110 is in the outline when the convex part 110 corresponding to one independent structure (for example, one character, one code | symbol) in a sign and decoration is planarly seen, Comprising: A portion completely surrounded by 110, and a portion where the convex portion 110 abuts on an extension line in three directions among the four directions of upper, lower, left and right. For example, in the case of Roman letters as shown in FIG. Here, since the area of the portion is naturally small, if the hole shown in Patent Document 2 exists in the portion, a large force acts on the small area, so that the sign and the decoration are easily deformed. This is particularly noticeable when the molten soap is taken out of the mold before it completely solidifies.

As shown in FIG. 2, in this embodiment, the vent hole 111 has a pinhole shape and is surrounded by a convex portion 110 corresponding to a concave logo “Kao” attached to the surface of the soap. It is provided in the part. The vent hole 111 is provided so that gas can pass but molten soap cannot pass. The opening area of the vent hole 111 is set according to the viscosity of the molten soap, and one opening area is preferably 0.2 to ¹ mm ² , particularly preferably 0.5 to 0.8 mm ² . The number of pinhole-shaped air holes in the portion surrounded by the convex portion 110 is preferably 1 to 5, particularly 1 to 3. The total opening area ratio of the air holes 111 in the portion surrounded by the convex portion 110 is 2 to 20%, particularly 5 to 10% in consideration of economy, although it depends on the sign or decoration attached to the soap surface. It is preferable.

  The cavity forming surface 11A of the split mold 1A and the cavity forming surface 11B of the split mold 1B are asymmetric, and the cavity forming surface 11A of the split mold 1A is larger than the cavity forming surface 11B of the split mold 1B. . As a result, the surface area of the cavity forming surface 11A of the split mold 1A is larger than the surface area of the cavity forming surface 11B of the split mold 1B. When the mold is opened after the molten soap is filled in the cavity and cooled and solidified, the soap is always held on the split mold 1A side having a large surface area on the cavity forming surface. The surface area of the cavity forming surface 11A is preferably larger than the surface area of the cavity forming surface 11B of the split mold 1B.

  As the surface area of the cavity forming surface 11A of the split mold 1A is made larger than the surface area of the cavity forming surface 11B of the split mold 1B, soap is more easily held on the split mold 1A side. However, the inventors have found that the soap is securely held on the split mold 1A side even if the difference in surface area between the two cavity forming surfaces 11A and 11B is not excessive. Apart from this, as the surface area of the cavity forming surface 11A of the split mold 1A is made larger than the surface area of the cavity forming surface 11B of the split mold 1B, the shape of the cavity forming surface 11A of the split mold 1A and the split mold 1B The shape of the cavity forming surface 11B is greatly different, the outer shape of the molded soap is greatly asymmetric, or a flow mark is likely to occur when molten soap is injected. As a result, the beauty of the soap may be reduced. Further, there are cases where it becomes difficult to perform molding economically, for example, the difference in the solidified state between both cavities becomes large and the cooling time takes longer than necessary. Moreover, the production of each split mold is complicated and not economical. The ratio of the surface area of the cavity forming surface 11A in the split mold 1A and the surface area of the cavity forming surface 11B in the split mold 1B is preferably 52:48 to 66:34, and should be 52:48 to 57:43. Is more preferable. By setting the surface area ratio of the cavity forming surface in this way, the split mold 1A does not greatly change the shape of each of the cavity forming surfaces 11A and 11B, that is, without excessively asymmetrical the outer shape of the molded soap. You can always keep the soap on the side.

  In order to hold soap more securely on the split mold 1A side, the surface roughness Ra of the cavity forming surface 11B in the split mold 1B may be made larger than the surface roughness Ra of the cavity forming surface 11A in the split mold 1A. preferable. As described in JP-A No. 2002-121599, when the surface roughness Ra of the recess is reduced, soap is held on the split mold side, and conversely, when the surface roughness Ra of the recess is increased, the anchor effect causes Soap is held on the split mold side. That is, the split mold in which the soap is held varies depending on the surface roughness Ra. The difference between the surface roughness Ra of the cavity forming surface 11A in the split mold 1A and the surface roughness Ra of the cavity forming surface 11B in the split mold 1B is preferably 0.1 to 30 μm, more preferably 0.2 to 20 μm. Thus, the soap can be more reliably held on the split mold 1A side having the low surface roughness Ra.

  In order to make the surface roughness Ra of the cavity forming surface 11B in the split mold 1B larger than the surface roughness Ra of the cavity forming surface 11A in the split mold 1A, each mold 1A, 1B is used in the molding die of this embodiment. The inner surface of each of the cavity forming surfaces 11A and 11B is mirror-finished to make each inner surface a region having the same low surface roughness, and at the same time, the bottom surface of the cavity forming surface 11B in the split mold 1B which is one of the split molds. The surface is roughened after the mirror surface processing to form a high surface roughness region. As the rough surface processing, for example, sand blasting is used. The means for changing the surface roughness is not limited to this method, and may be a known method.

  As shown in FIG. 1, the high surface roughness region formed on the cavity forming surface 11B of the split mold 1B is located on the bottom surface of the cavity forming surface 11B. That is, the high surface roughness region is formed on the bottom surface of the cavity forming surface 11B, which is a surface substantially parallel to the parting surface PL of the mold. This facilitates the release of the soap from the split mold 1B, and the soap is more reliably held on the split mold 1A side. The substantially parallel surface means that the bottom surface of the cavity forming surface 11B does not need to be a flat surface, and may be a curved surface that is a shape peculiar to soap.

  In order to hold soap more securely on the split mold 1A side, the area of high surface roughness in the cavity forming surface 11B of the split mold 1B is 30% or more, particularly 50% or more of the total area of the cavity forming surface 11B. It is preferable to occupy. Most preferably, the cavity forming surface 11B of the split mold 1B is a region having a high surface roughness throughout the entire area.

  Further, in order to hold the soap more securely on the split mold 1A side, the surface roughness Ra of the high surface roughness region on the cavity forming surface 11B of the split mold 1B is 0.2 to 30 μm, particularly 0.4. It is preferable that it is ˜20 μm. On the other hand, the surface roughness Ra of the low surface roughness region of the cavity forming surface 11B in the split mold 1B and the surface roughness Ra of the cavity forming surface 11A in the split mold 1A are both 0.1 to 30 μm, particularly 0.1 to 0.1 μm. It is preferably 20 μm. The surface roughness Ra of the low surface roughness region of the cavity forming surface 11B in the split mold 1B and the surface roughness Ra of the cavity forming surface 11A in the split mold 1A do not necessarily have to be the same value. However, considering the manufacturing costs of the split molds 1A and 1B, the split molds 1A and 1B are usually subjected to the same mirror finish, and as a result, the surface roughness Ra of both is described above. As you can see, it is almost the same.

  Further, in order to hold the soap more securely on the split mold 1A side, the surface roughness Ra of the high surface roughness region in the cavity forming surface 11B of the split mold 1B and the surface roughness of the cavity forming surface 11A in the split mold 1A The ratio of Ra (the former / the latter) is preferably 1.003 to 300, particularly preferably 1.01 to 100.

  Next, an embodiment of the soap production apparatus of the present invention will be described. As shown in FIG. 3 (a), the soap manufacturing apparatus 2 of this embodiment includes the mold 1, an injection apparatus 3 for injecting molten soap into the mold 1, and a mold 1. And a mold unit 4 that opens and closes.

  The mold 1 is mounted on the base plate 40 of the mold unit 4. On the base plate 40, a support plate 41 of the split mold 1A and a support plate 42 of the split mold 1B are erected. A cylinder 44 having a piston 43 is attached to the inner surface of the support plate 41. The cylinder 44 is attached so that the piston 43 slides in a direction orthogonal to the support plate 41. The tip of the piston 43 is fixed to the back surface of the split mold 1A. Therefore, the split mold 1A is a movable type that can move in the horizontal direction. The split mold 1A is fixed with its gate 12A side facing downward. An L-shaped cylinder holding plate 45 is attached to the lower part of the back surface of the split mold 1A. A cylinder 47 having a piston 46 is attached to the horizontal portion of the cylinder holding plate 45. The cylinder 47 is attached so that the piston 46 slides in the vertical direction. The tip of the piston 46 is connected to the gate pin P provided in the split mold 1A.

  The split mold 1B is attached to the support plate 42 such that the cavity forming surface 11B faces the cavity forming surface 11A of the split mold 1A and the nozzle insertion hole 12B is oriented in the horizontal direction. As is clear from FIG. 3A, the split mold 1B is a fixed mold. A molten soap injection device 3A is attached to the back side of the split mold 1B. The injection device 3 </ b> A includes a dispensing nozzle 31, a switching valve 32, a cylinder 33, and a piston 34 disposed in the cylinder 33. The dispensing nozzle 31 has a shape that matches the shape of the nozzle insertion hole 12B formed in the split mold 1B, and is inserted into the nozzle insertion hole 12B. A gate pin 35 is slidably inserted inside the dispensing nozzle 31, and the injection of molten soap from the dispensing nozzle 31 into the cavity is controlled by pushing and pulling out the gate pin 35. The switching valve 32 selectively connects the cylinder 33 to one of a circulation path 36 and a dispensing nozzle 31 that pass through a storage tank (not shown). In the state shown in FIG. 3A, the cylinder 33 and the extraction nozzle 31 communicate with each other, and the communication between the cylinder 33 and the circulation path 36 is blocked.

  Next, the manufacturing method of the bubble soap using the manufacturing apparatus will be described. First, the cylinder 44 of the mold unit 4 is operated to push out the piston 43 so that the split mold 1A and the split mold 1B are closed. In the split mold, water is circulated through the cooling water circulation path described above. Further, the cylinder 47 is operated to retract the piston 46, whereby a part of the gate pin P connected to the piston 46 is pulled out from the gate (runner) 12A (see FIG. 1). On the other hand, in the injection device 3, the piston 34 is pushed in, and the switching valve 32 is operated under this state to connect the cylinder 33 and the circulation path 36. Then, the piston 34 is pulled out and a predetermined amount of molten soap is fed into the cylinder 33. Molten soap is stored in a storage tank (not shown) and circulates in the circulation path 36 passing through the storage tank. Then, the circulating soap is circulated into the cylinder 33 by the flow path switching by the switching valve 32. By circulating the molten soap, separation of bubbles and liquid components in the molten soap is effectively prevented. As a method for preparing a molten soap containing innumerable bubbles dispersed therein, for example, the method described in the second column, line 15 to the fifth column, line 1 of JP-A-11-43699 can be used. Various gases can be used for foaming the molten soap. In particular, by using an inert gas, especially a non-oxidizing inert gas such as nitrogen gas, it is possible to effectively prevent off-flavors, etc. generated by deterioration or oxidative decomposition of the blended components due to heating of the molten soap. Can be prevented.

  Next, the switching valve 32 is operated to shut off the communication between the cylinder 33 and the circulation path 36 and to connect the cylinder 33 and the dispensing nozzle 31 as shown in FIG. The gate pin 35 is pulled out. Subsequently, the piston 34 is pushed in, and the molten soap 5 in the cylinder 33 is pushed out. Thereby, the molten soap 5 is pressurized and injected into the cavity 1C through the pouring nozzle 31 and the gate 12A. In order to further enhance the surface property of the obtained soap, it is preferable that the pressure injection speed of the molten soap 5 is the fastest while the liquid level of the molten soap 5 rises around the convex portion 110.

  As the molten soap is filled in the cavity 1C, the air in the cavity 1C is discharged not only from the air vent 13A but also from the deaeration holes 111 to be replaced with molten soap. When the liquid level of the molten soap 5 reaches the portion surrounded by the convex portion 110, most of the air in the portion is discharged from the deaeration hole 111 and is completely replaced with the molten soap. 5 is satisfied. As a result, the logo constituted by the convex portions 110 is accurately transferred onto the obtained soap surface.

  When the injection of the predetermined volume of molten soap is completed, the gate pin 35 is pushed in as shown in FIG. 3B to cut off the communication between the dispensing nozzle 31 and the cavity 1C. Further, the cylinder 47 is operated to push out the piston 46, and the gate pin P (see FIG. 1) connected to the piston 46 is pushed into the gate 12A. Thereby, the molten soap remaining in the gate 12A is injected into the cavity 1C.

  Next, the mold unit 4 is moved backward (moved to the right side in the figure), the injection device 3 is removed from the split mold 1B as shown in FIG. 3C, and the molten soap in the cavity 1C is cooled and solidified. As described above, each of the split molds 1A and 1B is cooled to a predetermined temperature by circulating the cooling water, thereby promoting the cooling and solidification of the molten soap in the cavity 1C. Injecting molten soap into the cavity 1C more than the volume of the cavity 1C is preferable because not only shrinkage and sink marks are prevented during cooling and solidification, but also the logo on the uneven portion 110 is transferred more clearly. .

  When the molten soap is solidified, as shown in FIG. 3D, the cylinder 44 is operated to retract the piston 43. As a result, the split molds 1A and 1B are opened, and the bubbled soap 6 in the cavity is taken out by a predetermined gripping means (not shown). In this case, the soap 6 is always held on the split mold 1A side. Accordingly, the soap 6 can be taken out by the gripping means always with respect to the split mold 1A side, so that the taking out becomes easy and the productivity is improved. Moreover, since the soap does not drop when the mold is opened, the manufacturing apparatus is not contaminated by debris or the like generated from the dropped soap. Further, the cavity forming surfaces 11A and 11B of the split molds 1A and 1B have asymmetrical irregular shapes. However, since there is no undercut portion in these recesses, it is not necessary to perform so-called forced removal when the mold is opened.

  Thereafter, the soap 6 is removed from the split mold 1A. However, since the mold 1 of the present embodiment is provided with the air holes 111 in the part surrounded by the convex part 110, the part surrounded by the convex part 110 is It is difficult to become a vacuum, and the stress generated during demolding can be kept small. As a result, it is possible to prevent the soap solidified at the portion from being damaged.

  There is no particular limitation on the time when the mold is opened after cooling and solidifying the molten soap, but the surface part of the soap is solidified at an earlier stage than the mold is opened after the soap is solidified. When the mold is opened in an unsolidified state, the soap is surely held on the split mold 1A side.

  The present invention is not limited to the embodiment. For example, in the above-described embodiment, a mold that forms a set of two split molds is used. However, the number of split molds is not limited to this, and depending on the shape of the soap, the mold may be composed of three or more split molds. Also good. In that case, it is preferable that the surface area of the recess in one split mold among the plurality of split molds is larger than the surface area of the recess in each remaining split mold.

  Moreover, in the said embodiment, although the area | region of high surface roughness was formed in the recessed part bottom face of the split mold 1B, this area | region is not essential for this invention, and the cavity formation surfaces 11A and 11B of each split mold 1A and 1B are as follows. The surface roughness may be as low as the same.

  In the above embodiment, the high surface roughness region on the cavity forming surface 11B of the split mold 1B is formed on the concave cavity forming surface that is substantially parallel to the parting surface PL. The formation position of the region is not limited to this, and may be another region on the cavity forming surface, for example, a surface substantially perpendicular to the parting surface PL. Further, when forming the cavity forming surface on the bottom side of the mold, instead of forming a high surface roughness region over the entire region, a plurality of discontinuous high surface roughness regions are formed in the portion. You may form a location.

  In addition, the cavity forming surfaces 11A and 11B of the split molds 1A and 1B are provided on the peripheral portion of the convex portion 110 (outside the enclosed portion) as necessary within a range that does not affect the effect of the air holes 111. Ventilation holes can be provided, and slits and small holes for air suction and blowout are formed for the purpose of reliable soap retention (split mold side) and reliable soap release (split mold side). Also good.

  Moreover, in the said embodiment, although the shaping | molding die and apparatus of this invention were used for manufacture of bubble soap which is an example of compression molding, the shaping | molding die and apparatus of this invention are used for manufacture of the normal soap which does not contain a bubble. You can also. However, the mold of the present invention is particularly suitable for the production of soaps with bubbles and soaps with high moisture content, where the strength of the soap is relatively low.

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the scope of the present invention is not limited to such examples.

[Example 1]
Aerated soap was produced using a production apparatus (see FIG. 3) equipped with a mold (see FIGS. 1 and 2) having vent holes of the following form. The following items were measured as follows.

<Each measurement method>
Viscosity of molten soap: The measurement method described in the applicant's already filed Japanese Patent Application Laid-Open No. 2002-167599 was followed.
Surface roughness: in accordance with JIS B0601. As a measuring device, a surface roughness measuring machine SURFCOM590A manufactured by Tokyo Seimitsu Co., Ltd. was used.
Air vent: Tool microscope Logo width: Tool microscope Logo height: Vernier caliper

[Form of mold]
The ratio of the surface area of the cavity forming surface 11A in one split mold 1A to the surface area of the cavity forming surface 11B in the other split mold 1B was 53:47. The cavity forming surface of each split mold was mirror-finished to form a low surface roughness region with a surface roughness Ra of 0.463 μm. However, in the split mold 1B, the bottom surface of the cavity forming surface was roughened with a sand blaster to form a high surface roughness region with a surface roughness Ra of 18.93 μm. The region of high surface roughness in the concave portion of the split mold 1B occupied 48% of the total area of the concave portion.

[Ventilation holes]
Opening area of one vent: 0.2mm ²
Number of ventilation holes in the portion surrounded by the convex part: 1
Total opening area ratio of ventilation holes in the part surrounded by the convex part: 5%

(Form of convex part)
Convex height: 1 mm
Width of convex part: 1-3mm

  Using the same blending components as the trade name “Pure Whip Soap” manufactured by Kao Corporation, a molten soap in which countless bubbles were dispersed and contained was prepared according to the method described in JP-A-11-43699 described above. Nitrogen gas was used for foaming.

  Using the prepared molten soap, an aerated soap was produced according to the steps shown in FIGS. The temperature of the molten soap was 64 ° C. The viscosity of the molten soap at that time was 125 mPa · s. Each split mold was cooled with 5 ° C. cooling water. The pouring time was 2.9 seconds, and the cooling time of the molten soap was 1 minute (5 mm from the soap surface was solidified and the center portion was still flowing).

[Comparative Example 1]
A soap was prepared in the same manner as in the example except that a soap mold without a vent hole was used.

  The entire “Kao” logo shown in FIG. 2 was accurately transferred onto the surface of the soap obtained in Example 1. On the other hand, the surface of the soap obtained by the comparative example was a chipped portion having a particularly poor logo transferability in a portion surrounded by “o”, which is one letter of the logo.

It is a perspective view which shows the shaping | molding die of the soap of this invention. It is a top view which shows typically the split mold which comprises the shaping | molding die shown in FIG. It is a figure which shows typically one Embodiment of the soap manufacturing apparatus of this invention, and the manufacturing process of soap using the same, (a) And (b) is a figure which shows the injection | pouring process of molten soap, (c) is The figure which shows the cooling process of soap, (d) is a figure which shows the demolding process of soap. It is a figure which shows the example of arrangement | positioning of the vent provided in the part enclosed by the convex part in a cavity formation surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Soap mold 1A Split mold 1B Split mold 11A, 11B Cavity formation surface 110 Convex part 111 Vent 2 Soap manufacturing apparatus 3 Injection apparatus 4 Mold unit 5 Molten soap 6 Soap

Claims (4)

A soap mold in which a set of split molds are assembled to form a cavity inside,
Protrusions corresponding to the markings and decorations attached to the surface of the soap on the formation surface of the cavity in the split mold are provided, and a vent is provided in a portion surrounded by the protrusions ,
The surface area of the formation surface of the cavity in one split mold is larger than the surface area of the formation surface of the cavity in each other split mold, and the surface area of the formation surface in one split mold and each other split mold A soap mold having a ratio of 52:48 to 66:34 with respect to the surface area of the forming surface . A set is claim 1 mold soap according constituted by two split mold.   The surface roughness Ra of the cavity forming surface in each other split mold is made larger than the surface roughness Ra of the cavity forming surface in one split mold, and the difference in the surface roughness Ra is 0.1. The soap mold according to claim 1, wherein the mold is ˜30 μm. A soap manufacture comprising the soap mold according to any one of claims 1 to 3 , an injection device for injecting molten soap into the mold, and a mold unit for opening and closing the mold. apparatus.

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