JPH11236069A - Spout-equipped cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve external appearance and usability for a spout-equipped cap made up by injection molding with its spout erected, from the bottom of the cap, by a method wherein gates for injection molding are provided at the reverse side of the bottom of the cap on positions at the side opposite to a side where the spout is erected. SOLUTION: A spout-equipped cap 10 mounted on a mouth part 1A of a container 1 with a measuring cup 2 mounted thereon is formed of a resin by injection molding, and while an engaging recessed part 11a for being driven onto the mouth part 1A of the container 1 is provided at the inner circumferential part at the lower end of an outer cylindrical part 11 thereof, a screw part 11B whereon the measuring cup 2 is screwed down is provided at the outer circumferential part at the upper end of the outer cylindrical part. Furthermore, a spout 14 is erected at an inclined planelike bottom part 13 of an inner cylindrical part 12 connecting to the inner circumference of the outer cylindrical part 11. For the structure as mentioned above, gates 30 for injection molding are provided at the reverse side 13A of the bottom part 13 on positions at the side opposite to a side where the spout 14 is erected, and the gates 30 are provided further at two positions being mutually symmetrical at both sides of the central axis of the cap 10 at the reverse side 13A of the bottom part 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molded cap with a spout.

[0002]

2. Description of the Related Art Conventionally, as an injection-molded cap for a detergent container or the like, there is a cap formed by erecting a spout from the bottom of the cap. As a conventional injection molding method for a cap with a spout, a method using a submarine gate and a method using a pinpoint gate are employed. In the injection molding method using the submarine gate, a resin is filled from the side surface of the outer peripheral portion of the cap product. In the injection molding method using a pinpoint gate, a resin is filled from the top surface of a spout of a cap product.

[0003]

However, according to the prior art, in the case of the submarine gate, a gate mark remains on the side surface of the outer periphery of the cap product, and in the case of the pinpoint gate, the gate is formed on the top surface of the spout of the cap product. Traces remain. For this reason, when the cap is attached to the container, a gate mark appears on a portion that appears in the appearance of the cap, and the appearance of the cap is poor. Further, the gate marks give the user's hand an unpleasant feeling of being caught, and the usability of the cap is poor.

An object of the present invention is to improve the appearance and usability of a cap with a spout.

[0005]

SUMMARY OF THE INVENTION The present invention relates to an injection-molded cap with a spout formed from the bottom of the cap. It is provided on the back surface opposite to the upright side.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a spout cap 10 is mounted on a mouth 1A of a container 1 and a measuring cap 2 can be attached thereto. That is, the cap 1
0 is produced by injection molding of a resin, and is formed by inserting a concave portion 11 into the opening 1 </ b> A of the container 1 at an inner peripheral portion on the lower end side of the outer cylindrical portion 11.
A, and a screw portion 11B to which the measuring cap 2 is screwed on the outer peripheral portion on the upper end side. Also, the cap 10
The spout 14 is provided upright on the inclined flat bottom 13 of the inner cylinder 12 continuous with the inner periphery of the outer cylinder 11. 14A is a liquid return slit.

[0007] At this time, the cap 10 is shown in FIGS.
As shown in FIG. 2 (a mold section corresponding to a vertical section taken along the line II-II in FIG. 1), the injection molding gate 30 is connected to the back surface 13A of the bottom portion 13 on the opposite side to the standing side of the spout portion 14 ( (The range of X shown in FIG. 1). The cap 10 includes two gates 30 and a bottom 1 of the cap 10.
3 are symmetrically arranged at two positions sandwiching the central axis of the cap 10 on the back surface 13A.

Hereinafter, the injection molding apparatus 20 used for producing the cap 10 will be described. As shown in FIG. 2, the mold 21 of the injection molding apparatus 20 includes a cavity 24 of a fixed mold 23 attached to the fixed-side mounting plate 22 and a core 27 of a movable mold 26 attached to the movable-side mounting plate 25. The molded product is molded in a molded part 28 having a gap between the cavity 24 and the core 27. In FIG. 2, PL
Indicates a parting line between the fixed mold 23 and the movable mold 26.

However, in the mold 21, the symmetrical shape of the fixed mold 23 with respect to the central axis of the molding 28 is 2.
Runners 29, 29 are provided at two positions,
The gate 29 communicates with the molding part 28 at gates 30 and 30. The gate 30 is arranged on the back surface 13A side of the bottom portion 13 of the cap 10 formed by the forming portion 28. The gate 30 is a pinpoint gate, which automatically cuts the resin gate portion 30A when the fixed die 23 and the movable die 26 are opened, so that the cap 10 and the resin runner portion 29A can be separated and taken out. I do.

The injection molding apparatus 20 performs the injection molding of the cap 10 as follows. (1) With the mold 21 clamped, the molten resin is filled from the runner 29 into the molding section 28 via the gate 30.

(2) After the resin in the molding section 28 is melted and solidified, the mold 21 is opened. As a result, the resin runner portion 29 on the fixed mold 23 and the cap 10 on the movable mold 26 are separated by automatic cutting of the resin gate portion 30A therebetween, and can be taken out.

Therefore, according to the present embodiment, the following operation and effect can be obtained. (Operation and Effect Corresponding to Claim 1) Since the gate 30 of the injection molding is provided on the back surface 13A of the bottom portion 13 of the cap 10, the gate mark appears on the appearance of the cap 10 when the cap 10 is mounted on the container 1. And the appearance of the cap 10 can be improved. In addition, the usability of the cap 10 can be improved without the gate trace giving an uncomfortable feeling to the user's hand.

(Operation and Effect Corresponding to Claim 2) By providing a plurality of gates 30, the pressure resistance during injection molding is reduced, the flow orientation of the resin in the mold 21 is good, and the molding of the cap 10 is performed. Can be stabilized. By arranging the plurality of gates 30 symmetrically about the center axis of the cap, the flow orientation of the resin in the mold 21 is further improved.

In the present embodiment, since the gate 30 is disposed on the inclined flat back surface 13A at the bottom portion 13 of the cap 10, the processing and maintenance of the mold 21 are easier than those disposed on the side surface of the cap 10. It will be easier.

In the embodiment of the present invention, the gate may be provided on the back surface 15A (FIG. 1) of the connecting bottom portion 15 of the outer cylindrical portion 11 and the inner cylindrical portion 12 of the cap 10. Also in this case, the gates are preferably arranged symmetrically at a plurality of positions on the back surface 15A.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and the design can be changed without departing from the scope of the present invention. The present invention is also included in the present invention. For example, three or more gates of the present invention may be arranged on the back surface of the bottom of the cap.

[0017]

As described above, according to the present invention, the appearance and usability of the spouted cap can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a cap.

FIG. 2 is a schematic view showing an injection molding apparatus.

[Explanation of symbols]

 10 Cap with Spout 13, 15 Bottom 13A, 15A Back 14 Spout 30 Gate

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[Procedure amendment]

[Submission date] January 13, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005]

SUMMARY OF THE INVENTION The present invention relates to an injection-molded spout cap having a spout section erected from the bottom of the cap. Inside the cap on the back side opposite to the standing side
This is provided symmetrically at a plurality of positions with respect to the center axis .

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

By providing a plurality of gates 30,
The pressure resistance during injection molding is reduced, the flow orientation of the resin in the mold 21 is good, and the molding of the cap 10 can be stabilized. By arranging the plurality of gates 30 symmetrically about the center axis of the cap, the flow orientation of the resin in the mold 21 is further improved.

Claims (2)

[Claims] 1. An injection-molded spout cap having a spout section erected from the bottom of the cap, wherein an injection-molded gate has a rear surface opposite to the spout erected side at the bottom of the cap. A cap with a spout, characterized in that it is provided in a cap. 2. The cap with a spout according to claim 1, wherein said gate is provided at a plurality of positions on the back surface of the bottom of the cap.