JP4304083B2 - Method for manufacturing content takeout device and content takeout device - Google Patents

Description

  The present invention relates to a method for manufacturing a content take-out device and a content take-out device used by being attached to a container filled with a drink or other liquid such as a sports drink or orange.

Conventionally, as shown in FIG. 11, a bag-like container body 151 made of a flexible film, and a straw-shaped contents take-out device having a mouth part 141, a conduit part 142, and a joint part 143 projecting left and right at the upper end of the conduit part 142 A liquid container in which the conduit portion 142 of the content take-out device is inserted into the internal space of the bag-like container main body 51 and the joint portion 143 of the content take-out device is fixed to the opening of the bag-like container main body 51 Is used (see Patent Document 1). This container is used as a container for sports drinks, orange juice, udon noodle soup, grilled meat sauce, etc., because its contents take-out device functions as a straw or spout, and is easy to open and lightweight. ing. Further, the content take-out device is often a synthetic resin injection-molded product. Conventionally, this injection-molded product is molded by injecting molten resin into a mold cavity from a position corresponding to the lower end of the conduit portion of the content take-out device through a sprue, a runner, and a two-point gate (see Patent Document 2). . However, in the method of injecting molten resin into the cavity from the position corresponding to the lower end side of the conduit portion of the content take-out device, the mouth portion of the content take-out device is far from the gate, and a short mold is likely to occur during molding. There was a problem. As a method for solving this problem, there has been proposed a method of injecting molten resin into a cavity from a gate provided at a position corresponding to the mouth portion from the upper end of the conduit portion of the content take-out device (Patent Document 2). reference). FIG. 10 shows a content take-out device 40 formed by this method. In FIG. 10, 41 is a mouth portion, 42 is a conduit portion, 43 is a joint portion, 44 is a screw portion, 45 is a support flange, 46 is a rib, Reference numeral 47 is a flange at the upper end of the conduit portion, 48 is a content outlet, 49 is a cap, and 50 is a trace of the gate at a position corresponding to the position closer to the mouth 41 than the upper end of the conduit portion 42 of the content extracting device.
Japanese Utility Model Publication No. 61-137539 Japanese Patent No. 3408383

  However, according to the method of Patent Document 2, the gate is located at a position closer to the mouth portion 41 than the conduit portion upper end flange 47 of the content take-out device, so that short molding at the mouth portion 41 is difficult. The lower end of the conduit part 42 is far from the gate, and a short mold is likely to occur at the lower end of the conduit part 42.

  Moreover, in order to improve the moldability (gas escape) of the support flange 45 of the mouth part 41, it is necessary to divide the mold and design the mold so as to improve the gas escape. In the method, it is not possible to provide a mold dividing line corresponding to the support flange 45 in terms of dimensions. That is, in the method described in Patent Document 2, since the gate is located between the support flanges 45, 45, the moldability of the flanges 45, 45 is poor, and the appearance of the product is not good due to gas, burns, or the like.

  An object of the present invention is to provide a method for manufacturing a content take-out device and a content take-out device in which a fatal short mold does not occur over the entire content take-out device and the problem of the formability of the support flange is solved. It is.

  Invention of Claim 1 solves the subject regarding said manufacturing method, and has a substantially straw shape, and a pair of junction part and junction part upper end which protruded right and left in a mouth part, a conduit part, and a conduit part upper end In the manufacturing method of the content takeout device having the flange at the upper end of the conduit portion connected to the mold, a mold gate is arranged corresponding to the position corresponding to the flange at the upper end of the conduit portion of the cavity, and the molten resin is inserted into the cavity from the gate. The gist of the present invention is a method for manufacturing a content take-out device, which is characterized by injection molding.

  In the manufacturing method of the present invention, it is preferable that the cavity of the mold is formed in a shape including a recessed portion in a part of the flange at the upper end of the conduit portion, and the gate is positioned in the recessed portion. The cavity of the mold is formed in a shape that includes a recessed part in the flange at the upper end of the conduit part, and the gate is placed in the recessed part, so that when the contents take-out device is mechanically transported by the protrusion of the trace of the gate A catch can be avoided.

  In the manufacturing method of the present invention, in consideration of the weight balance of the molded product, the upper end of the conduit portion is set so that there is no great difference between the weight of the region on the mouth side (weight per unit area) and the weight on the conduit portion side with respect to the gate position. A gate was provided at a position corresponding to the flange. That is, according to the manufacturing method of the present invention, for example, with respect to a weight of 1.5 g on the mouth side with respect to the position of the gate, a range in which a large difference in weight between the two regions and a weight of 1.8 g on the conduit side does not occur. It can reduce the weight on the mouth side, prevent fatal short molding at the mouth, and the gate is located not far from the lower end of the conduit part, so fatal short mold at the lower end of the conduit part Can be prevented.

  Further, in the manufacturing method of the present invention, since the gate is arranged corresponding to the position corresponding to the flange at the upper end of the conduit portion of the cavity, the dimensional accuracy, gas, etc. There are no problems such as poor product appearance due to burning.

  Invention of Claim 3 solves the subject regarding the content take-out apparatus, has a substantially straw-like shape, and a pair of joints and joints projecting left and right at the mouth part, the conduit part, and the upper end of the conduit part It has a flange at the upper end of the conduit portion connected to the upper end, the flange portion at the upper end of the conduit portion has a recessed portion in a part thereof, and a trace of a gate that does not protrude from the recessed portion is formed in the recessed portion. A gist of a content take-out device formed by injection molding, which is a feature.

  In consideration of the weight balance of the molded product, the content take-out device of the present invention has a conduit so that there is no great difference between the weight of the region on the mouth side (weight per unit area) and the weight on the conduit portion side with respect to the gate position. A gate is arranged at a position corresponding to the flange at the upper end of the part and injection molded. That is, the content take-out device of the present invention is formed by injecting molten resin into the cavity from the gate disposed at a position corresponding to the flange at the upper end of the conduit portion, and prevents a fatal short mold at the mouth. Moreover, since the gate is located not far from the lower end of the conduit portion, a fatal short mold at the lower end of the conduit portion is also prevented.

  Further, in the content take-out device of the present invention, a recessed portion is provided in a part of the flange at the upper end of the conduit portion, and the trace of the gate is positioned one step lower than the flange surface at a position corresponding to the recessed portion. A catch when the contents take-out device is transported by the machine due to the protrusion of the trace is avoided.

  Invention of Claim 4 solves the subject regarding the content taking-out apparatus, has a substantially straw-like shape, and has a pair of joints and joints projecting left and right at the mouth part, the conduit part, and the upper end of the conduit part It has a flange at the upper end of the conduit connected to the upper end, and there is a gate at the flange at the upper end of the conduit, and the amount of resin on the mouth side is 5 to 20% less than the amount of resin on the conduit side with the gate as a boundary. A gist of a content take-out device formed by injection molding characterized by the above. In this way, the resin weight on the conduit side is increased compared to the mouth side because the cavity is filled with resin from the mouth side first in the process of injection molding of the content takeout device. Short mold is unlikely to occur on the mouth side, and if there is no short mold on the conduit side, no short mold can be seen on the mouth side, and it is only necessary to inspect the short mold on the conduit side. This is because inspection after molding is easy.

  According to the manufacturing method of the content take-out device of the present invention, the upper end of the conduit portion connected to the upper end of the mouth portion, the conduit portion, and the upper end of the conduit portion is connected to the upper end of the mouth portion, the conduit portion, and the upper end of the conduit portion. In the manufacturing method of the content take-out device having a flange, a mold gate is arranged corresponding to the position corresponding to the flange at the upper end of the conduit portion of the cavity, and the molten resin is injected from the gate into the cavity to be molded. The occurrence of a short mold from the mouth of the content take-out device to the end of the conduit portion can be substantially eliminated. Moreover, the moldability of the support flange at the mouth is good, and it is possible to provide a product that does not have a defective dimensional accuracy of the flange, or a defective appearance of the product due to gas burn.

  In addition, the content take-out device of the present invention is formed by injecting molten resin into the cavity from the gate disposed at a position corresponding to the flange at the upper end of the conduit portion, so that a fatal short mold at the mouth portion is prevented. In addition, since the gate is located at a position not far from the lower end of the conduit portion, a fatal short mold at the lower end of the conduit portion is also prevented. Furthermore, a concave portion is provided in a part of the flange at the upper end of the conduit portion, and the trace of the gate is positioned one step lower than the flange surface at a position corresponding to the concave portion. It is characterized by avoiding catching during machine transport.

  Moreover, the content take-out device of the present invention has a gate at the flange portion at the upper end of the conduit portion, and the resin amount on the mouth side is 5 to 20% of the resin amount on the conduit portion side with the gate as a boundary. The feature is that there is little, so if there is no short mold on the conduit side, no short mold can be seen on the mouth side, and only the short mold on the conduit side is inspected. Later inspection is easy.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 show a content takeout device manufactured by the method of the present invention. FIG. 1 is an enlarged front view of the content take-out device, and FIG. 2 is a side view thereof. The content take-out device is an injection-molded product made of plastic such as polyethylene or polypropylene, and has a mouth part 1, a conduit part 2, and an upper end flange 2a at the upper end part of the conduit part 2, and a joint part 3 projecting left and right. I have. The mouth portion 1 is lined with a screw portion 4 for tightening a cap (not shown), support flanges 5a and 5b for hanging the content take-out device, and content take-out devices lifted via the support flanges 5a and 5b. Ribs 6 are formed for this purpose. The support flanges 5a and 5b extend in the horizontal direction, and two or more support flanges may be arranged in parallel. The rib 6 is provided to prevent a support flange of another content take-out device from entering between the support flanges 5a and 5b, and is an opening between the two support flanges 5a and 5b. Is formed so as to protrude in the front direction or the back direction of the content take-out device. Further, four content outlets 7 are formed in the conduit portion 2.

  As shown in FIGS. 1 and 5, the upper end flange 2 a of the conduit portion 2 is provided with a recessed portion 8, and a trace 9 of a gate that does not protrude from the recessed portion 8 is formed in the recessed portion 8. Has been. Since the trace of the gate is positioned one step lower than the flange surface, it is possible to prevent the content take-out device from being caught when the machine is transported due to the protrusion of the trace of the gate. 2 is a side view of the content take-out device, and FIG. 3 is a longitudinal sectional view of the content take-out device. 4 is a cross-sectional view taken along line A-A ′ of FIG. 3, FIG. 5 is a cross-sectional view taken along line B-B ′ of FIG. 3, and FIG. 6 is a cross-sectional view taken along line C-C ′ of FIG. 7 is a cross-sectional view taken along the line D-D 'of FIG.

  FIG. 8 shows an example of an injection molding apparatus applied to manufacture of the content takeout apparatus of the present invention. The gate 26 is disposed corresponding to a region 27 a corresponding to the upper end flange 2 a of the conduit portion 2 of the cavity 27. Reference numeral 24 is a sprue, 25 is a runner, and 31 is a molten resin. Since the gate 26 is located at a position relatively close to the center of gravity of the content take-out device, the resin can be spread throughout the content take-out device without causing a short mold. The content take-out device can be formed by removing the core 18 after the molten resin 31 in the cavity 27 is cured.

  FIG. 9 shows a comparison of the basis weight between the case of the invention made by the method of the invention described in Patent Document 2 and the case of the case made by the method of the invention.

First, according to the invention described in Patent Document 2, the basis weight of the H ₁ region on the right side from the gate 13 is about 1 g. On the other hand, the weight per unit area of the left H ₂ from the gate 13 is about 2.3 g. According to the invention described in Patent Document 2, it is possible to substantially eliminate the short mold of the mouth portion, but it is difficult to eliminate the short mold of the conduit portion. Moreover, in order to improve the moldability (gas escape) of the support flange 45 of the mouth part 41, it is necessary to divide the mold and design the mold to improve the gas escape. In the method described in Document 2, it is not possible to provide the mold parting line 11 corresponding to the support flange in terms of dimensions. As a result, the gas escape operation from the gate 13 is not sufficiently performed, and the gas may diffuse toward the support flange, resulting in poor appearance of the product due to gas firing or the like.

  The center of gravity position 12 of the contents take-out device is located on the joint 3. However, if a gate is disposed here, the unevenness of the trace of the gate is formed in the joint 3 and the adhesiveness with the packaging bag of the joint is deteriorated. Absent. Further, since the content outlet 7 is close, if the gate is positioned at the joint 23, burrs are likely to occur at the opening of the content outlet 7.

In contrast, in the case of the production method of the present invention, since the gate 14 is disposed at a position corresponding to the upper end flange 2a of the conduit section, for example, the basis weight of the right area D ₁ of the region from the gate 14 is set to 1.5g, basis weight from the gate 14 of the left side D ₂ region of 1.8, filling the resin without causing a short mold cavity from the mouth large difference not in the basis weight of both regions up to the end of the conduit portion Can do.

  In the content take-out device of the present invention, it is preferable that a recessed portion 8 is provided in a part of the flange 2a at the upper end of the conduit portion as shown in FIGS. 1 and 5, and a gate trace 9 is located in the recessed portion 8. As a result, it is possible to prevent the machine from being caught on the machine conveyance due to the protrusion of the gate trace 9.

  In the content takeout device of the present invention, the amount of resin on the mouth side can be reduced by 5 to 20% with respect to the amount of resin on the side of the conduit, with the gate as a boundary. This is because, in the process of injection molding of the content take-out device, the cavity is filled with the resin from the mouth side first, so that a short mold hardly occurs on the mouth side, and a short mold is not formed on the conduit side. If it does not occur, no short mold can be seen on the mouth side, and it is only necessary to inspect the short mold on the conduit side, so that inspection after molding is easy.

  In addition, as illustrated in FIG. 8, it is not necessary to supply grease to the upper portion of the mold by using a mold that extends the axis of the cavity shape of the mold in the horizontal direction and opens and closes in the horizontal direction. Therefore, when the mold is opened and the content take-out device is taken out, the molded body is not contaminated by the grease.

  The content take-out device of the present invention is attached to a bag-like container body made of a flexible film, and the content take-out device attached inside functions as a straw or a spout, and is easy to open and lightweight. It can be used as a container for sports drinks, orange juice, udon noodle soup, grilled meat.

It is a front view of the content extraction apparatus of this invention. It is a side view of the content extraction apparatus of this invention. It is a longitudinal cross-sectional view of the content extraction apparatus of this invention. FIG. 4 is a cross-sectional view taken along arrow A-A ′ in FIG. 3. FIG. 4 is a cross-sectional view taken along arrow B-B ′ in FIG. 3. FIG. 4 is a cross-sectional view taken along the line C-C ′ of FIG. 3. FIG. 4 is a cross-sectional view taken along arrow D-D ′ in FIG. 3. It is a figure which shows an example of the shaping | molding apparatus used for shaping | molding of the content extraction apparatus of this invention. It is the model which shows the relationship between the position of the gate of the shaping | molding method by invention of patent document 2, and a fabric weight, and the schematic diagram which shows the relationship between the position of the gate of the molding method by this invention, and fabric weight. It is a figure which shows the content extraction apparatus by invention of patent document 2. FIG. It is a figure which shows an example of a liquid container.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Opening part 2 Conduit part 2a Flange of a conduit | pipe upper end 3 Joining part 4 Screw part 5a Support flange 5b Support flange 6 Rib 7 Content outlet 8 Recessed part 9 Trace of a gate 11 Mold split line 12 Center of gravity position 13 14 The position of the gate in the invention 14 The position of the gate in the present invention H ¹ The area on the right side from the gate 13 in the invention described in Patent Document 2 H ² The area on the left side from the gate 13 in the invention described in Patent Document 2 D ^{1 In the} present invention Right side area from gate 13 D ² Left side area from gate 14 in the present invention 151 Bag-like container body 141 Mouth part 142 Conduit part 143 Joint part 24 Sprue 25 Runner 26 Gate 27 Cavity 27a Corresponding to the flange at the upper end of the conduit part of the cavity Area 18 Core 31 Molten resin 40 Contents take-out device 41 Mouth part 42 Upper flange 48 contents outlet 49 cap 50 gates traces of the tube portion 43 joint 44 screw portion 45 supporting flange 46 rib 47 conduit portion

Claims (2)

It has a substantially straw shape,
A mouth portion, a conduit portion, a pair of joints projecting left and right at the upper end of the conduit portion, and a flange at the upper end of the conduit portion connected to the upper end of the joint portion,
Content formed by injection molding characterized in that there is a gate at the flange portion at the upper end of the conduit portion, and the amount of resin on the mouth side is 5 to 20% less than the amount of resin on the conduit portion side with the gate as a boundary. Take-out device. 2. The injection according to claim 1, wherein the flange at the upper end of the conduit portion includes a recessed portion in a part thereof, and a trace of a gate having a height that does not protrude from the recessed portion is formed in the recessed portion. Content take-out device formed by molding.

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