JPH09271481A - Manufacture of floss cleaning instrument - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To simplify continuous molding at the time of molding of a floss cleaning tool connected to a dental floss and to prevent a pitch deviation between the dental floss to shorten a molding cycle. SOLUTION: Dental floss is held in parallel and in a parallel tension state in a mold 5 of a floss cleaning tool at a plurality of intervals, and a plurality of thread tension portions 2 are provided at intervals in the longitudinal direction of each dental floss 1. In the continuous molding method of integrally molding the grip portion 3 connected to each thread tension portion 2 with a resin, at least one end side of the plurality of juxtaposed dental flosses 1 is provided with a space holding piece 6 across each dental floss 1. By integrally molding and connecting in a blind shape and releasing from the mold, it is possible to continuously produce a large number of floss integrated molding type cleaning tools connected to the dental floss, preventing pitch deviation of each dental floss and spacing without entanglement. It is easy to hold, easy to handle, and remarkably easy to set before molding, improving workability, simplifying continuous molding, and contributing to shortening the molding cycle. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interdental cleaning device for cleaning between teeth, and more particularly to a floss cleaning device for removing food residues and plaque adhering between teeth using dental floss. The present invention relates to a method for manufacturing a tool.

[0002]

2. Description of the Related Art In general, food residues and plaque adhering between teeth, which cannot be cleaned well only by brushing with a toothbrush, tend to cause tooth decay, gingivitis and bad breath.
It is known to use simple dental floss to remove food particles and plaque caught in the gap between teeth. In particular, in the related art, in order to use a thread tension portion with tensioned dental floss as an inter-tooth cleaning tool provided at the other end of the grip portion, a U-shaped thread tension portion is formed at the tip of the grip portion to form a holder. In molding, it is possible to integrate dental floss by insert molding, as described in JP-A-56-132948 and Japanese Utility Model Application Laid-Open No. 58-861.
No. 14, for example.

[0003]

However, in order to improve the efficiency of the molding operation by continuously molding the conventional disposable floss integral molding type floss cleaning tool, a plurality of dental floss is formed in the molding die. Adopts a continuous molding method in which a plurality of thread tension parts and a gripping part connected to each thread tension part are integrally molded by maintaining parallel tension at parallel intervals and spacing in the longitudinal direction of each dental floss. Then, after releasing the molded product from the molding die, the hanging dental floss fluctuates and at the same time, the pitch deviation of the dental floss tends to occur easily, which is inconvenient to handle and has a drawback that the workability is significantly lowered. The dental floss that is separated from each other has a problem that it is difficult to set before molding, which hinders continuous molding, and the molding cycle cannot be shortened. The present invention is intended to easily eliminate these conventional drawbacks, facilitates continuous molding at the time of molding of the cleaning tool connected to the dental floss, and
An object of the present invention is to provide a low-cost floss cleaning tool by shortening a molding cycle and improving workability.

[0004]

DISCLOSURE OF THE INVENTION The present invention is to manufacture a floss cleaning tool using a molding die, which comprises a thread tension portion in which dental floss is strained and a grip portion which is continuous with the thread tension portion. , Dental floss is held in parallel and parallel in a molding die with a plurality of intervals, and a plurality of thread tension portions are provided at intervals in the longitudinal direction of each dental floss, and a grip portion connected to each thread tension portion is provided. In the continuous molding method of integrally molding, the space holding pieces are integrally molded by straddling each dental floss on at least one end side of the plurality of juxtaposed dental flosses, and are connected in a blind shape to be released from the mold.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In an embodiment of the present invention, a dental mold is held in parallel with a plurality of dental floss in parallel in a parallel tension state, and a plurality of yarns are formed at intervals in the longitudinal direction of each dental floss. In a continuous molding method of integrally molding a stretched portion and a grip portion connected to each thread stretched portion, at least one end side of the plurality of juxtaposed dental flosses is integrally formed with a spacing piece over each dental floss. Since it is connected and released in a blind shape, it is possible to continuously produce a large number of floss-integrated type cleaning tools connected to the dental floss, prevent the pitch shift of each dental floss, and easily maintain the intervals without entanglement and easy handling. Moreover, setting before molding is remarkably easy, workability is improved, continuous molding is simplified, and the molding cycle is shortened.

[0006]

EXAMPLE An example of the present invention will be described with reference to the floss cleaning tool shown in FIGS. 1 to 3. Tens such as polyamide resin bristles, polyester resin bristles, and polyethylene resin bristles are used.
An arch-shaped threaded portion 2 to which a dental floss 1 of 0 to 1000 denier is tensioned, and a grip portion 3 connected to the threaded portion 2
The disposable floss cleaning tool 4 consisting of
The dental floss is held in parallel in the forming die 5 by the guide groove at a plurality of intervals and in a parallel tension state, and a plurality of thread tensions are provided at intervals in the longitudinal direction of each dental floss 1. In the continuous molding method of integrally molding the portion 2 and the grip portion 3 connected to each thread tension portion 2 with a resin such as polystyrene resin or polypropylene resin, each dental floss 1 is provided on one end side of a plurality of the dental floss 1 arranged in parallel. The interval holding pieces 6 are integrally formed over the floss 1 and are connected like a blind to be released from the floss 1. The floss cleaning tool 4 can be continuously produced in a state of being connected to a plurality of dental floss 1.

Although the interval holding piece 6 is a rod-like connecting piece, thinned notches 7 are provided on both sides in the vicinity of the dental floss 1 to facilitate cutting or breaking in post-treatment and recycling. It is advisable to give consideration so that mixing of different resins can be easily prevented when collecting the material. Also,
One end of a plurality of dental flosses 1 arranged side by side when integrally molding a floss cleaning tool 4 consisting of a thread tension part 2 in which the dental floss 1 is strained and a grip part 3 continuous to the thread tension part 2. Side of the dental floss 1 is molded by a cutting means, for example, a cutter 8 provided in a molding die 5 and a concave portion 9 for receiving the cutter. It is also possible to separate each shot, but it is also possible to repeat each shot in a plurality of shots or in a continuous state without repeating each shot to produce a series. In this case, a plurality of the dental flosses arranged side by side are collectively moved with respect to the molding die for each predetermined length, and are arranged to penetrate through the floss cleaning tool molding cavity to be molded into the floss cleaning tool. The cutting interval can be selected by freely adjusting the protrusion of the cutter 8.

For cutting the dental floss 1, a cutter 8 projecting from the molding surface of the molding die 5 and a cutter-receiving recess 9 opposite the cutter 8 are stretched between them. The dental floss 1 is preferably cut when the molding die 5 is closed, and can be cut with the fixed cutter 8 for each molding one shot, or with a type in which the protrusion of the cutter 8 is freely projected or withdrawn, or for each multiple shots. It is possible to cut in a predetermined length in a continuous state. Further, when the cut position is also below the distance holding piece 6, it is preferable to cut the position below the distance holding piece 6.

A plurality of floss cleaning tools 4 are connected to the dental floss 1 so as to be packaged in series or in a double package, so that one floss cleaning tool 4 can be cut off and used on the user side. It is convenient. In this case, the spacing piece 6 may be cut off or provided between a series of adjacent dental floss 1 by breaking it off. The floss cleaning tool 4 and the spacing holding piece 6 are molded by injecting resin flowing from a gate (not shown) into the cavity, but the insertion groove (not shown) of the dental floss 1 is divided. It is provided on at least one of the molding dies 5 so that the dental floss 1 can be easily insert-molded.

[0010] As the molding die 5, a split molding die of a fixed die and a movable die is used in opposition, and an ejector pin for removing the insert-molded floss cleaning tool 4 from the die is used. The mold release means is appropriately provided to facilitate continuous molding and shorten the molding cycle.

[0011] In the specific example of FIG. 4, the distance holding pieces 6,6 ₁ rod-shaped molded as a connecting member to the upper and lower ends side position of the dental floss 1 includes a plurality of said floss cleaner, dental floss of the plurality Article Since they are connected like a blind, it is possible to appropriately prevent the entanglement of the dental floss 1.

Further, enclosed by a plurality comprise a frame strip spacing holding piece 6 ₂ around the dental floss 1 in parallel plural rows floss cleaning tool 4 as in the embodiment of FIG. 5, the upper, lower, left and right each dental floss 1 It is possible to maintain an appropriate interval to facilitate removal of the floss cleaning tool 4, prevent entanglement of the dental floss even when a large number of molded products are stacked, and facilitate handling such as boxing as it is.

The present invention also includes the following characteristic method. A method for manufacturing a floss cleaning tool, wherein recesses for thinning are formed on both sides in the vicinity of the dental floss in a space holding piece integrally formed over the dental floss so that the dental floss can be separated. A method for forming a floss cleaning tool by collectively moving the dental floss for each predetermined length in a continuous state with respect to a molding die and penetrating the floss cleaning tool through a cavity for molding the floss cleaning tool.

[0014]

Industrial Applicability According to the present invention, dental floss is held in parallel in a parallel tension state in a molding die at a plurality of intervals, and a plurality of thread tension portions are provided at intervals in the longitudinal direction of each dental floss. In a continuous molding method of integrally molding a grip portion connected to a thread tension portion, at least one end side of a plurality of the above-mentioned dental flosses arranged in parallel straddle each dental floss, and integrally form a space holding piece to connect them in a blind shape. By releasing the mold, it is possible to continuously produce a large number of floss-integrated type cleaning tools connected to the dental floss, prevent the pitch deviation of each dental floss, keep the intervals without entanglement, and handle easily. The previous setting is remarkably easy, workability is improved, continuous molding is simplified, the molding cycle can be shortened, and a low-cost floss cleaning tool can be manufactured.

[Brief description of drawings]

FIG. 1 is a plan view showing a part of a molding die used in a manufacturing method of the present invention.

FIG. 2 is a perspective view of the usage example of FIG. 1 in one use state.

FIG. 3 is an enlarged vertical sectional view of a part of the example of FIG. 1 in a separated state.

FIG. 4 is a perspective view of a usage state of another embodiment of the present invention.

FIG. 5 is a perspective view showing a usage state of still another embodiment of the present invention.

[Explanation of symbols]

1 Dental floss 2 Thread tension part 3 Grasping part 4 Floss cleaning tool 5 Molds 6, 6 ₁ , 6 ₂ Interval holding piece 7 Notch part 8 Cutter 9 Recessed part

Claims (2)

[Claims] 1. A method for manufacturing a floss cleaning tool comprising a thread tensioned portion of a dental floss and a gripping portion continuous to the thread tensioned portion by a molding die, wherein the dental floss is formed on the molding die. In a continuous molding method in which a plurality of thread tension portions are held parallel to each other in parallel in a parallel tension state and a plurality of thread tension portions are spaced in the longitudinal direction of each dental floss, and a grip portion connected to each thread tension portion is integrally molded. A method for manufacturing a floss cleaning tool, comprising: integrally forming a space holding piece over at least one end side of the plurality of the dental floss arranged in parallel over each dental floss, and connecting the pieces to each other in the shape of a blind to release them. 2. An end side of a plurality of rows of dental floss arranged side by side when integrally forming a floss cleaning tool including a thread tension part in which the dental floss is tensioned and a gripping part continuous to the thread tension part. 2. The method for manufacturing a floss cleaning tool according to claim 1, wherein the interval holding pieces are molded with, and each dental floss is cut by a cutting means at the other end side of the dental floss.