JPS61197172A - Shank for edge tool and manufacture thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) This invention relates to handles made of synthetic resin materials for cooking utensils and eating utensils such as cutlery, forks, ladles, etc., and a method for manufacturing the same.

(Prior Art) Conventionally, when forming the handle of a cutlery using a synthetic resin material, as shown in FIG. After the material was injected and solidified, it was taken out of the mold F and stuck to the core B. When it was desired to decorate the pattern H, an uneven pattern was previously formed on the inner wall of the cavity C of the mold F, and a pattern corresponding to the pattern was applied to the pattern H.

However, when a pattern is formed on the inner wall of the cavity C of the mold F, it is impossible to change the pattern of the pattern H as long as the same mold F is used.

Therefore, when it is desired to manufacture patterns H with different decorative patterns, it is necessary to prepare a plurality of molds F, which increases the total cost. Furthermore, when a general mold F is used, the joint line of the joint part of the mold F remains on the abdomen and back of the handle H at the position corresponding to the joint part of the upper mold and the lower mold during molding. , a special mold F was required to apply the pattern to this part.

In addition, as shown in FIG. 11, there was also one in which the handle (2) was constructed from a pair of side plates S made of a synthetic resin material. However, in this handle H, the core B is placed between the side plates S, and the core B is exposed from the back and abdomen of the handle H.

However, with this pattern H, it was necessary to caulk both side plates S to the core B, making the manufacturing work very complicated.

Moreover, a gap may occur between the side plate S and the core B, making the attachment of the handle H unstable.

(Problems to be Solved by the Invention) As described above, this invention requires a special mold to decorate the back and abdomen, and multiple molds are prepared to apply different decorative patterns. This is an attempt to solve the problems of high costs, complicated manufacturing work, and unstable installation.
The purpose is to provide a handle for knives, etc. that can be decorated with decorations on the back and abdomen, to keep the total cost low, and to make it easy to manufacture and securely attach to the core, as well as a method for molding the handle. Our goal is to provide the following.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, in the first invention, as shown in FIG. 1 and FIG. Among them, a plurality of buried recesses 5 are formed in at least one end face, and an exposed part 6 between these buried recesses 5 is exposed from the handle 2 integrally molded with synthetic resin material R, Furthermore, in the second invention, as will be described in detail in the later embodiments, 1. a step of recessing a plurality of buried recesses 5 in at least one of the upper and lower end surfaces of the core 3; and this recessing step. After that, there is a step of arranging the core 3 in the mold 7 and molding the handle 2 with synthetic resin material R, and after this molding step, at least one of the back and abdomen of the handle 2 is shaved to create a buried recess. This method adopts a means consisting of a step of exposing the exposed portion 6 between the holes 5 and 5 from the handle 2.

(Function) Since this invention employs the above-mentioned means, the handle 2 is attached to the core 3 having the embedded recesses 5 of different shapes in the same mold 7.
Furthermore, the exposed portion 6 can be exposed from the handle 2 by simply cutting a part of the handle 2.

(Example) Hereinafter, an example in which the present invention is embodied in a knife handle and a manufacturing method thereof will be described in detail with reference to FIGS. 1 to 9.

In FIG. 1, 1 is the blade of a knife, and 2 is a synthetic resin handle insert-molded into a core 3 extending rearward from the proximal end of the blade 1. In FIG. Note that the vertical widths of the blade 1 and the core 3 are approximately equal. In particular, as shown in FIG. 3, 4 is an uneven decorative surface that extends almost over the entire length of both the upper and lower end surfaces of the core 3, and has a large number of semicircular arc shapes lined up at regular intervals. It consists of buried recesses 5 and exposed portions 6 located between the buried recesses 5.

As shown in Fig. 2, with the handle 2 fixed to the core 3,
The buried recess 5 of the core 3 is buried in the handle 2, and the exposed part 6 is exposed flush with the back surface and abdominal surface of the handle 2.

Now, a method for forming the handle of the knife constructed as described above will be explained below.

First, as shown in FIG. 4, the core 3 on which the decorative surface 4 has been formed in advance is placed in the cavity 9 of the lower mold 8 of the mold 7, and then the upper mold 10 is placed on the lower mold 8. Note that the vertical width of the core 3 is formed to be slightly smaller than the width of the cavity 9 of the mold 7. Furthermore, since the end of the blade of the core 3 is held between the mold 7, the core 3 will not move within the cavity 9 due to the pressure of the liquid synthetic resin material R injected.

Next, a liquid synthetic resin material R is placed inside the cavity 9 of the mold 7.
is injected, and the mold 7 is cooled to solidify the synthetic resin material R. Therefore, the synthetic resin material R is fixed to the core 3 while covering the entire core 3, and the handle 2 is formed. Thereafter, the upper mold 10 is separated from the lower mold 8 and the handle 2 is taken out from the mold 7. Note that the less the synthetic resin material R covering the decorative surface 4 of the core 3 is, the easier it is to take out the handle 2 from the mold 7. Therefore, it is desirable that the difference between the width of the mold 7 and the vertical width of the core 3 be small.

After taking out the handle 2 from the mold 7, the synthetic resin material R of the part corresponding to both decorative surfaces 4 of the core 3 is shaved, and the exposed part 6 is removed from the handle 2.
exposed flush from the back and abdomen of the patient. Therefore,
As shown in FIG. 2, the exposed portions 6 are arranged at regular intervals in the length direction on the back and abdomen of the handle 2, giving a simple and beautiful appearance.

Further, in order to expose the exposed portion 6 of the core 3 from the handle 2, it is only necessary to cut the dorsal and ventral parts of the handle 2, so manufacturing is easy.

Furthermore, after manufacturing the handle 2, the synthetic resin material R is applied to the core 3.
Since the handle 2 is solidified to cover almost the entire area except for the exposed part 6, the attachment of the handle 2 is very stable.

Further, the buried recess 5 of the core 3 in the present invention can also be formed into a rectangular shape from the front, as shown in FIG.

Furthermore, as shown in FIGS. 6(a) to 6(j), the planar shape of the buried recess 5 of the core 3 may be made into a regular shape, a rectangular shape, a ■ shape, etc., or these shapes may be combined as appropriate. , it is also possible to give the appearance of the pattern 2 a sense of luxury.

Even if the appearance of the handle 2 is changed by forming the buried recess 5 in a different shape as described above, the mold 7 used for molding the handle 2 may always be the same.

Therefore, total cost can be kept low.

Note that the present invention is not limited to the above-described embodiments; for example, (1) the planar shape of the buried recess 5 of the core 3 is not limited to a semicircular or rectangular shape; By setting the spacing arbitrarily, you can make the appearance of the handle 2 even more interesting.
As shown in FIG. 8, by inserting the protrusions 12 of the mold 7 into both the locking holes 11 during molding of the handle 2, the liquid synthetic resin material R is formed. To further ensure that the core 3 is prevented from moving during injection, ■ To form the decorative surface 4 only on one of the dorsal and ventral end surfaces of the core 3, ■ Figure 9 (a) ), a tongue-shaped hook 14 is formed at the rear end of the core 3, and this hook 14 protrudes from the rear end of the handle 2, so that the hook 14 can be used when the knife is not in use. A hole 13 made through the core is configured so that it can be hung on a nail, etc., or a hammer part 15 formed at the rear end of the core 3 is inserted from the rear end of the handle 2, as shown in FIG. 9(b). Any changes may be made without departing from the spirit of this invention, such as making the knife protrude to broaden the purpose of use of the knife, or applying it to other cooking utensils and eating utensils such as forks and ladles in addition to knives. may be unpaid.

(Effects of the Invention) As detailed above, in the first invention of the present application, a plurality of buried recesses are provided in at least one of the upper and lower end surfaces of the core, and a gap between these buried recesses is provided. The exposed portion is exposed from a handle integrally molded with a synthetic resin material, and further, in the second invention, a step of recessing a plurality of buried recesses in at least one of both upper and lower end surfaces of the core, and the recess forming step. After that, there is a step of placing the core in the mold and molding the handle with synthetic resin material, and after the same molding step, at least one of the back and abdomen of the handle is shaved to remove the exposed part between the buried recesses. By exposing the handle from the handle, it is possible to decorate the back and abdomen, and it is also possible to keep the total cost low.Furthermore, it is easy to manufacture, and the attachment to the core is in good condition. It has the excellent effect of being reliable.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing the present invention embodied in a knife handle, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a partially cutaway front view showing the core, and Fig. 4 is a partially cutaway front view showing the invention as embodied in a knife handle. FIG. 5 is a cross-sectional view showing a method of forming a handle in a mold; FIG. 5 is a partially cutaway front view showing a core having buried recesses of different shapes; FIGS.
) is a partially cutaway front view showing a separate buried recess, FIG. 7 is a partially cutaway front view showing a core having a locking hole, and FIG.
9(a) and 9(b) are cross-sectional views showing the state when the core shown in the figure is placed in the mold, respectively. A partially cutaway front view showing the handle, and FIGS. 10 and 11 are a sectional view and a plan view, respectively, showing the prior art. Handle 2, core 3, buried recess 5, exposed portion 6, synthetic resin material R
0 Patent applicant Hattori Hamono Co., Ltd. Agent
Patent Attorney On 1) Hiroshi Nobuo Figure 1, Figure 2, Figure 4, Figure 6, Figure 6, Figure 8

Claims (1)

[Claims] 1. A plurality of buried recesses (5) are formed in at least one of the upper and lower end surfaces of the core (3), and an exposed portion (6) is formed between these buried recesses (5). ) is exposed from a handle (2) molded from a synthetic resin material (R). 2. The handle of a cutlery or the like according to claim 1, wherein the exposed portion (6) is exposed flush with the handle (2). 3. The handle of a knife or the like according to claim 1, wherein the buried recess (5) is formed in a semicircular shape from the front. 4. The handle of a knife or the like as set forth in claim 1, wherein the buried recess (5) is formed in a rectangular shape from the front. 5. Place the buried recess (5) and exposed portion (6) into the core (3)
The handle of a cutlery or the like according to claim 1, characterized in that the handle is formed on both upper and lower end surfaces of the handle. 6. A step of forming a plurality of buried recesses (5) in at least one of the upper and lower end surfaces of the core (3), and after the recess forming step, inserting the core into the mold (7). (3) and molding the handle (2) with synthetic resin material (R), and after the same molding process, at least one of the back and abdomen of the handle (2) is shaved to create a buried recess (5). ) between the exposed part (6) of the handle (2
) A method for manufacturing a handle for a knife, etc., comprising the step of exposing the handle from the 7. Manufacture of a handle for a cutlery or the like according to claim 6, characterized in that the vertical width of the core (3) is formed to be slightly smaller than the width of the cavity (9) of the mold (7). Method.