KR0172624B1 - Form manufacturing apparatus of tooth brush body for attaching buffer material - Google Patents

Abstract

Conventional toothbrushes are made up of the entire toothbrush body hard to damage the gums during toothbrush work, but the present invention has formed a plurality of cushioning member fastening protrusions on the rear surface of the brushed planting portion of the toothbrush body and maximize the coupling area with the buffer member The separation between members during use is suppressed, and a plurality of second sprues 5 are formed between the fixed measurement plate 1 and the fixed side plate 3 to coincide with the gate holes of the plurality of cavities 6. A gate 7 communicating with the second sprue 5 is provided in the upper cavity 6a of the stationary side plate 3 with the backup plate 2 interposed therebetween, and the narrow portion 6a 'of the upper cavity 6a. It is formed on the inlet side of the and at the same time formed two projections (6c) protruding, and the upper cavity (6a) in the central portion of the core plate (4) which is hermetically contacted with the fixed side template (3) and the parting line (8) as a boundary And a cavity having a narrow portion 6b 'and a wide portion 6b " 6b) was developed, but a mold manufacturing apparatus for a toothbrush with a buffer function that formed a recess 9 having a surface roughness of 0.1 to 0.45 on the bottom side of the wide part 6b " Concave-convex portion 24 formed to protrude a plurality of concavities and convexities (24a) on the back surface of the raised planting portion 23, including the front end portion 25, the front end left and right portions 26 and the buffer member coupling hole 22 It is dug lower than the thickness of the cushioning member 21, and forms a partial wall by the uneven part 24 by the left side wall 26a and the right side wall 26b, and guides the molding resin when the buffer member resin is press-fitted. Toothbrush body moldings with shock absorbing members were developed to play a role and prevent spills.

Description

Body shaping device for toothbrush

1 is an exploded perspective view of the molding apparatus of the present invention.

2 is a perspective view of a fixed side plate of the molding apparatus of the present invention.

3 is a cross-sectional view of the fixed side plate of the molding apparatus of the present invention.

Figure 4 (a) (b) (c) is a side view showing the operating state of the molding apparatus of the present invention.

5 is a cross-sectional view of the molding apparatus of the present invention.

Figure 6 is an overall configuration of the molding apparatus of the present invention combined with an injection machine.

7 is a plan view of the toothbrush body before molding the elastic member of the molding apparatus of the present invention.

8 is a side cross-sectional view of the toothbrush body molding produced by the molding apparatus of the present invention.

9 is an exploded perspective view of a toothbrush produced by the molding apparatus of the present invention.

* Explanation of symbols for main parts of the drawings

1: fixed side device plate 2: backup plate

3a: runner 3b: gate

3: fixed side plate 4: core plate

5: second spruce 6: cavity

6a: Upper cavity 6b: Lower cavity

6c: Hanging projection 6b: Narrow part

6b: wide part 7: gate

8: parting line 9: concave portion

10: nozzle 11: sprue bush

11a: sprue 12: stop rod

13: parting line 20: toothbrush body

21: buffer member 22: buffer member coupling hole

25: tip portion 27: primary hair insertion hole

28: cushioning member protrusion 40: hopper

41 screw 42 heating plate

The present invention relates to a molding apparatus suitable for producing a toothbrush body molded article for a toothbrush having a cushioning function attached to a tip thereof. Specifically, the present invention relates to a toothbrush molding apparatus capable of easily constructing a shock absorbing member formed of a heterogeneous elastic material on the underside of the brushed body of the primary molded toothbrush body, and a toothbrush body molded body having an elastic member using the apparatus. .

In the case of a general toothbrush, the tip is brushed and fabricated on a part of one side surface of various shapes such as a rod-shaped or rectangular parallelepiped made of a hard material, and the tip or handle part is made of a hard material at once. Such a hard toothbrush body may give a bad impact on the surface of the gums or other periphery and cause an injury to the oral hygiene by causing an injury in the oral cavity. Japanese Utility Model Publication No. 4-69256 provides a relatively thick soft elastic material on the upper surface of the tip brush planting base of the toothbrush body, and provides a structure in which the bristle base is embedded in the soft elastic material. The effect was questionable because it only gave elasticity between the brush and the body.

Japanese Laid-Open Patent Publication No. 557-148332 provides the use of Cushion rubber with Cushion rubber on the periphery of the brush attached to the toothbrush body.However, Cushion Rubber is attached and how strong it can withstand after attaching. There was no mention that it was just a simple design that could not be produced. That is, even though the adhesion between the rubber and the toothbrush body can be made with an adhesive, it was extremely doubtful whether the hygiene and the fastness of the attachment were indeed at the time of insertion into the oral cavity.

Similarly, DE3628722, Germany, provides the brush head with a toothbrush that coats the sides and the front by injection molding.However, when a simple injection molding method is used, foreign substances with different melting points, adhesive strength, and shrinkage are firmly fused together There is no mention at all, and it is related to the design which is impossible to carry out by the usual injection molding method.

In order to improve the above disadvantages, the inventors of the Korean Utility Model Registration Application No. 93-15016 allow the cushioning member fastening protrusion to be inserted into a hole formed in the body of the toothbrush, and at the same time, give a large number of irregularities in the bottom of the toothbrush body, so that the area of thermal fusion is increased. At the same time as possible, the locking action of the fastening protrusion allows for strong coupling (see FIGS. 8 and 9).

The present invention provides a structure of the toothbrush to provide a toothbrush body molded article and a molding manufacturing apparatus that can easily produce a large amount of the toothbrush body molded article further improved the function of the cushioning material of the present inventors as well as the shock absorbing member to a stronger fusion. The present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view of the molding apparatus of the present invention, the stationary side plate is shown in perspective view in FIG. 2, and FIG. 4 shows the operation relationship of these molding apparatus in a side view. 5 is a cross-sectional view of the upper and lower cavities where the injection resin is injected, and the coupling relationship with the injection apparatus is shown in FIG. The product using the above apparatus is shown in FIG. 7, FIG. 8, and FIG.

The injection molding apparatus provided in the present invention separates the movable side plate from the fixed side plate while injecting and cooling the synthetic resin material by heating it through a screw while injecting it into the cavity through a sprue, a runner and a gate of the fixed measuring plate in contact with the nozzle. In the apparatus for manufacturing a predetermined injection molded product, a plurality of second sprues 5 are coincident with the gate holes of the plurality of cavities 6 between the fixed side stationary plate 1 and the fixed side plate 3. The back plate 2 is interposed, and the upper cavity 6a of the fixed side plate 3 has a gate 7 communicating with the second sprue 5 at the entrance side of the upper cavity narrow portion 6a '. At the same time, the two clasps 6c are formed so as to protrude, and the center part of the core plate 4 which is hermetically contacted with the fixed side plate 3 and the fighting line 8 as a boundary is the same as the upper cavity 6a. Width narrow part 6b 'and width part 6b' ' To provide the lower cavity 6b, but to form a recess 9 having a surface roughness of 0.1 to 0.45 mu on the bottom side of the wide portion 6b '', a heterogeneous material, in particular an elastic material, is provided with a toothbrush tip. It was possible to attach and mold closely to the bottom.

Toothbrush body 20, which is another object of the present invention, is first molded before planting the toothbrush, and the uneven portion is formed so that a plurality of protrusions and protrusions 24a protrude on the back surface of the brushed planting portion 23 in which a plurality of hair insertion holes are formed. 24 is excavated lower than the thickness of the buffer member 21, including the tip portion 25, its front left and right sides 26, and the buffer member coupling hole 22, and the left wall 26a and the right wall 26b. By forming a partial wall by the concave-convex portion 24 by the resin for the buffer member to act as a guide and a leakage preventing role of the molding resin when indented.

The manufacturing process of the toothbrush with elastic material using the apparatus of this invention is demonstrated.

The inlet portion of the sprue bush 11 is coupled to the nozzle 10 of a conventional injection molding apparatus so that the backup plate 2, the fixed side plate 3, and the core plate 4 are respectively connected to the fifth part (b). In the same manner, the first molded injection-molded article primary insertion hole 27 was fitted to the two locking projections 6c in the wide portion 6a '' of the upper cavity 6a, and then integrated.

Then, the screw of the injection molding apparatus was operated to allow the injection-shaped elastic material for injection of the syrup, which passed through the hopper 40 and the heating plate 43, to pass through the sprue 11a of the sprue bush 11 and continuously communicate with each other. It flows into the cavity 6 through the runner 3a, the first sprue 5b, and the gate 2b of (3). At this time, the material for forming the shock absorbing member 21 is injected through the shock absorbing member coupling hole 22 of the primary injection molded toothbrush body 20 without the shock absorbing member 21 of the present invention. As shown in the figure, the fluidized elastic material covers the entire back surface uneven portion 24 of the brushed planting portion 23 and simultaneously fills up to about half of the tip portion 25 and its left, right, right portion 26 (first). 5 degrees and 6 degrees). When the filling of the injection material is completed in the cavity, as shown in FIG. 4 (c), the core plate 4 moves backward, dragging the stationary side plate 3 and the backup plate 2, and then the backup plate 2 The stop rod 12 is caught and further progress is hindered, and the fixed side plate 3 also releases the bond with the core plate 4 at the parting line 8, so that the sprue and runner are removed and the cushioning member is fused. The desired toothbrush is obtained. Subsequently, the toothbrush bristles are moved to complete the final product.

As described above, in the toothbrush product using the apparatus of the present invention, as shown in FIGS. 8E and 9, the shock absorbing member is firmly fused to the back surface of the toothbrush and the shock absorbing member 21 is buffered in the shock absorbing member coupling hole 22. Since the member fastening member 28 is heat-sealed and fixed, there is no separation between the buffer member and the body even when there is a strong impact or rapid heating and cooling during use, and mass production is possible using the apparatus of the present invention.

Claims (1)

In the molding manufacturing apparatus which heat-melts the synthetic resin material and cools what is injected into the cavity through the sprue, the runner and the gate of the fixed shaft stop plate which is in contact with the nozzle, and then separates the movable side plate from the fixed side plate to produce a predetermined injection molding. The backup plate 2 is interposed between the fixed measuring plate 1 and the fixed shaft plate 3 so that the plurality of second sprues 5 coincide with the gate holes of the plurality of cavities 6. In the upper cavity 6a of the fixed side plate 3, a gate 7 communicating with the first sprue 5 is formed at the inlet side of the narrow portion 6a 'of the upper cavity 6a, The locking projection 6c is formed to protrude, and a narrow portion having the same width as the upper cavity 6a is formed at the center of the core plate 4 which is in close contact with the stationary side plate 3 and the parting line 8. A lower cavity 6b having a width 6b 'and a width 6b " Molding manufacturing apparatus of the toothbrush with a buffer function which formed the recessed part 9 whose surface roughness is 0.1-0.45 micrometers in the bottom face side of ").