KR0185787B1 - Injected plastic tube - Google Patents

Abstract

The present invention relates to a plastic tube in which the cap portion is capped, the tubular body portion is injection molded integrally, one end is closed, and the other end is opened to seal the opening after filling the contents, and the injection mold apparatus for manufacturing the same. In order to achieve this, the present invention comprises a head unit and the mold apparatus comprising a pair of slider cores for forming the head side of the mold and the movable side mold and the inner side and the outer core for forming the body portion of the tube and the fixed side mold and tube; In order to form the body integrally by one injection process, or by installing a rotating core for forming a cap with a fixed side mold, a tube in which the head and the body and the cap are integrally formed in one injection process can be formed. It is possible to manufacture tubes by injection process only. The shortening effect, as well as will allow the manufacture of a tube product can be quickly prepared in the form of a tube product for which mass production is possible, and different length and size.

Description

Plastic tube products in which the head part and the body part are integrally molded and their manufacturing apparatus

The present invention relates to a capped head portion, a plastic tubing product which is integrally injection molded with a tubular body portion closed at one end and opened at the other end and sealed after filling of the contents, and an apparatus for manufacturing the same.

In general, the tube is composed of a head portion covered with a conventional screw cap and the contents are drawn out, and a body portion (also called a sleeve) in which the contents are contained by being extended and coupled to one side of the head portion. One end of the head part is blocked in the manufacturing step, and the other end, that is, the body part is opened so that the filling of the contents is made possible. Then the tube is preferably manufactured to have a certain degree of elasticity to be drawn out and restored by pressing the body portion from the outside when the contents are used.

However, conventionally, in manufacturing a tube, a head part is manufactured by an injection process, and a body part is separately molded by an extrusion process, and then these two products are integrally compressed again by a thermocompression means, which is a single tube. Since the injection molding machine for the head part molding, the extruder for the body part molding, and the adhesive machine for joining the separated molded head part and the body part were necessary, at least 4 to 5 people were required. Molding was possible only when In addition, since the tube manufacturing process consists of approximately three steps of injection, extrusion, and adhesion, there is a problem that only about 12,000 to 20,000 products can be produced per day, because a lot of working time is naturally required. .

In addition, in the conventional case, since the mold device in the closed state is remodeled to take out the molded product during the injection work, the mold is ejected from the moving mold according to the ejection compaction, and thus the surface of the product is damaged during the ejection process, and a lot of defects occur. The product's produceable shape, i.e. the length or size of the product, was very limitedly molded, so that it was impossible to mold and supply various types of tube products.

Accordingly, the present invention has been made to solve the above-mentioned general drawbacks, and an object of the present invention is to obtain a tube product of various plastic materials in which the head part and the body part are integrally molded at one time as a single injection machine, and also after remodeling. The head part and the body part are integrated in order to reduce the work process, reduce the number of people, and reduce the cost of the product by supplying the tubing product quickly as it is drawn out by the self-loading method from the fixed mold. The present invention provides a tube product and an apparatus for manufacturing the same.

Another object of the present invention is to provide a tube product in which the cap for covering the head part is integrally injection molded and a manufacturing apparatus thereof.

1 is a front sectional view of an injection tube according to an embodiment of the present invention.

2 is a schematic cross-sectional view showing a closed state of a mold apparatus for manufacturing the injection tube of FIG.

3 is a schematic cross-sectional view showing an open state of a mold apparatus for manufacturing the injection tube of FIG.

Figure 4 is a front sectional view of the injection tube according to another embodiment of the present invention.

5 is a schematic cross-sectional view showing a closed state of a mold apparatus for manufacturing the injection tube of FIG.

6 is a schematic cross-sectional view showing an open state of a mold apparatus for manufacturing the injection tube of FIG.

* Explanation of symbols for main parts of the drawings

1 tube 2 thread

3: head part 4: opening part

5: body portion 8: fixed side mold

9: movable side mold 10: slider core

11: fixed side attachment plate 12: nozzle bush

17: fixed side base plate 20: movable side mounting plate

22, 23: movable upper and lower mold plate 24: movable side base plate

27: outer core 28: inner core

28a: body shaping portion 28b: head shaping portion

29: cylinder rod 30, 35: male thread forming portion

31, 37: gate forming surface 32: cap

32a: Female thread 33: Rotating core

33a: female thread forming portion 34: runner

36: Semicircle request

A feature of the present invention for achieving the above object is, a male screw for fastening to the outer peripheral surface is formed and the head portion having a hole for the extraction of the contents after removal of the gate, and the head portion is formed to extend, the contents can be filled The tubular body part of which one opening is formed is preferably a tube product molded integrally by an injection process.

Another feature of the invention is that the tube product is integrally injection molded, including a cap which is screwed onto the male thread of the head.

In the manufacturing apparatus of the present invention, there is provided a fixed side mold having a nozzle bush, a movable side mold having an inner core and an outer core for forming a body portion of a tube product, which is located on one side of the fixed side mold and the high side. It consists of a pair of slider cores positioned between the mold and the movable side mold to form the head portion.

Another apparatus of the present invention includes a nozzle bush, an inner core and an outer core for forming a body portion, and a movable side mold to be remodeled sequentially, which is positioned to one side of the movable side mold, and a cap is integrated into the head portion. A pair of fixed side molds having a rotating core for injection into the fixed block, the fixed side base plate being sequentially opened around the spacer block, and positioned between the dies for integrally injection molding the head part and the cap with respect to the body part; The slider consists of a core.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows a tube 1 of plastic material manufactured according to an embodiment of the present invention, the tube 1 is a head portion 3 is formed with a male screw 2 for chamfering on the outer peripheral surface, and It consists of a tubular body part 5 having an opening 4 which is integrally injection molded to extend to the bottom of the head part 3 and the end part is open to enable filling of the material.

In addition, the upper surface of the head portion 3 is formed with a hole 7 for drawing out the contents by removing the gate 6, and the lower end opening 4 of the body portion 5 is filled with the contents after filling the contents. It is sealed separately by the pressing means.

Fig. 2 shows an injection mold apparatus of an embodiment for manufacturing the plastic tube 1 shown in Fig. 1 in a closed state, in which the injection apparatus comprises a fixed side mold 8, a movable side mold 9, and a pair. The slider core 10 of the.

First, the fixed side mold 8 will be described, and the nozzle bush 12 on which the sprue 12a is formed is fixed to the central portion of the fixed side attachment plate 11 by the locating ring 13. In addition, a lower plate of the fixed side attachment plate 11 is provided with a receiving plate 15 on which a runner plate 14 for forming a runner 14a is communicated with the nozzle bush 12. The runner container 18 having the runner gate 18a and the insert mold 19 are fixed to the same line as the state plate 16 fixed to the bottom and the fixed side base plate 17, respectively. An end portion of the runner gate 18a of the runner container 18 fitted in the portion 19 penetrates in a state coinciding with the lower end surface of the insert mold 19.

Then, the movable side mold 9 is assembled with the supporting plate 21, the movable side upper and lower mold plates 22, 23, and the movable side base plate 24 sequentially on the movable side attachment plate 20. A plurality of support shafts 25 are provided through the movable side attachment plate 20 and the support plate 21 to the movable side lower die plate 22, and one end of the support shaft 25 is movable. The fixing bolt 26, which is inserted from the side base plate 24 and penetrated to the movable side upper die plate 22, is fastened and fixed, so that the whole movable mold 9 moves when opened.

On the other hand, the movable core upper plate 23 and the movable base plate 24 are fitted so that the outer core 27 is not detached in a state coinciding with the center of the insert mold 19 of the fixed mold 8. Inside the core 27, an inner core 28, one end of which is fixed to the movable side lower die plate 22, is provided therethrough.

At this time, the inner core 28 penetrated in the outer core 27 has a body shaping portion 28a and a head portion 3 for forming the body portion 5 of the tube 1 shown in FIG. The head forming part 28b for forming is sequentially formed, and when the body forming part 28a is combined with the outer core 27, empathy is formed in consideration of the thickness of the body part 5 of the tube 1. It is fitted in the state, and the head shaping | molding part 28b protrudes outward from the upper end than the outer core 27. As shown in FIG.

A pair of slider cores 10 for forming the head 3 of the tube 1 between the fixed side base plate 17 and the movable side base plate 24 of the molds 8 and 9 are formed. The slide core 10 is opened or retracted to the outer chamber at the time of opening and closing, respectively, according to the action of the cylinder rod 29.

On the other hand, each end of the slider core 10 has a semicircular shape in consideration of the circular shape of the head portion 3, a male screw for forming the male screw 2 of the head portion 3 on its inner circumferential surface. The molding part 30 and the gate shaping surface 31 are formed, respectively.

On the other hand, when the fixed side mold 8, the movable side mold 9, and the pair of slider cores 10 are closed for injection, the same shape as that of the tube 1 of FIG. Will have a space.

Therefore, when the resin of the molten fixed shaft mold 8 is injected into the nozzle bush 12 in order to manufacture the tube 1 in the closed state as described above, the injected melt index is a runner container fixed in the insert mold 19. Each space of the shape of the tube 1 which is supplied through the runner gate 18a of 18, and formed by the inner core 28 and the outer core 27 of the movable side metal mold 9, and a pair of slider core 10. The tube (1) product of the state which flowed in and finally the one end part is opened is shape | molded.

In this state, when the molded tube 1 product is completely cooled to some extent, first, as shown in FIG. 3, the movable side mold 9 moves about a fixed distance from the fixed side mold 8 by a predetermined distance. The cores 28 and 27 are also moved simultaneously and completely separated from the body 5 of the shaped tube 1. In the above state, the primary separation of the movable die 9 is completed and at the same time, a pair of slider cores 10 holding the head 3 of the tube 1 product are moved outwardly by the action of the cylinder rod 29. At the same time, the tube 1 fixed by the slider core 10 is automatically dropped from the fixed side mold 8 according to its own load to complete the molding of one tube 1 product.

The tube 1, which has been molded in the above state, is capable of integrally molding the head part 3 and the body part 5 by the cores 27 and 28 members, and conventionally ejects the molded product. Instead of the method, since it is to fall automatically from the fixed side mold (8) is taken out without damaging the product.

In addition, the tube 1 product manufactured by the manufacturing apparatus is preferably manufactured to a thickness of about 0.3 to 0.4 mm in consideration of the elasticity of the body portion 5, but is not necessarily limited thereto, material or product use According to the characteristics of the body forming part 28a or the head forming part 28b of the inner core 28 is produced differently, or the product forming space when closing the outer core 27, the slider core 10 By installing differently according to the shape of the product, the thickness and length of the molded product (up to 60-120 mm) can be manufactured as much as possible, so that various types of products can be molded.

On the other hand, when the molding of the product of the one tube (1) is completed, the mold must be paralleled again for the next molding. In this case, the fixed side mold (8) and the slider core (10) are moved to the opposite side when the mold is opened. What is necessary is just to make a closed state (state of FIG. 2) and then to perform a molding operation, and as the opening and closing of the mold are continuously and repeatedly performed, the molding operation of the product may also be continuously performed.

4 to 6 show another embodiment of the present invention, in which the head portion 3 having the male screw 2 and the body portion 5 having the opening portion 4 are integrally formed as shown in FIG. The cap 32 in which the female thread 32a was formed in the inner peripheral surface to the upper surface of the said head part 3 with respect to the made tube 1 is injection-molded simultaneously.

At this time, by removing the cap 32 connected to the head portion 3 by the gate 6, a hole 7 for drawing out the head portion 3 is formed at the same time (see FIG. 1). Symbol indicates identical parts). The tube 1 shown in FIG. 4 made as described above is manufactured by the mold apparatus shown in FIGS. 5 and 6, which will be described in detail.

As shown in Fig. 5, the fixed side mold 8, the movable side mold 9 and the pair of slide cores 10 are formed. It consists of a receiving plate (15), a spacer plate (16), a fixed side base plate (17) moved relative to the spacer block, and the fixed side base plate (17) to form a cap (32) of the tube (1). The rotating core 33 is provided through, and the screw shaping | molding part 33a of the predetermined diameter for forming the female screw 32a of the cap 32 is projected outward.

In addition, the movable side mold 9 is composed of a movable side attachment plate 20 and a support plate 21, two movable side upper, lower mold plates 22, 23 and a movable side base plate 24. An outer core 27 is fitted into the movable side base plate 24, and an inner core 28 in which the body forming portion 28a and the head forming portion 28b are sequentially formed has a space in consideration of the tube thickness. It is penetratingly installed in a state where the head forming portion 28b is located in a state in which it is projected to the outside of the outer core (27).

In addition, the inner core 28 is connected to the nozzle bush 12 fixed to the movable side attachment plate 20 and the runner plate 21a through a runner 34 having a runner gate 34a at an end thereof. It is.

On the other hand, between each of the base play (7), (24) of the fixed side mold (8) and the movable side mold (9) a pair of heads for forming the head portion 3 and the cap 32 of the tube (1) The slider core 10 is located, and the slider core 10 is opened or retracted outwardly according to the action of each cylinder rod 29. In addition, the slider core 10 has a semicircular shape at each end surface, and a male screw forming portion 35 and a cap 32 for forming the male screw 2 at the outer circumferential surface of the head portion 3 at the end surface thereof. The semi-circle request 36 and the gate shaping surface 37 for forming the shape are respectively formed.

Therefore, when the fixed side mold 8, the movable side mold 9, and the slider core 10 are closed for injection, the space having the same shape as that of the tube 1 of FIG. 4 as shown in FIG. Will have.

In this state, when the molten resin is injected through the nozzle bush 12 of the movable side attachment plate 20, the molten resin is supplied through the runner plate 21a and the runner 34, and the supplied resin is molded through the runner gate 34a. It is injection molded and cooled into each space of the tube 1 shape formed in the apparatus. When molding is completed in the above state, as shown in Fig. 6, first, the rotating core 33 of the fixed side mold 8 is rotated by a power means such as a motor (not shown), so that the female screw 32a on the inner peripheral surface of the cap 32 is formed. The screw forming part 33a which forms () is pulled out, and the receiving plate 15, the spacer plate 16, and the fixed side base plate 17 are sequentially opened centering on the space block.

In addition, when the opening operation described above is completed, the movable side mold 9 is also remodeled, and the movable side dies 21, 22 and the support plate 21 on which the inner core 28 is fitted are the movable side attachment plate 20. ), And the movable side base plate 24, into which the outer core 27 is fitted, is opened secondarily and completely exits from the body 5 of the tube 1.

On the other hand, as described above, the fixed side mold 8 and the movable side mold 9 are opened, respectively, so that the tube 1 is supported by a pair of slider cores 10. At this time, the slider core 10 When the cylinder rod 29 is moved to both sides to open, the tube 1 is completely free and automatically falls on the fixed side mold 8 by its own load, thereby completing a single product forming operation.

Therefore, since the tube 1 formed by the above-described mold structure is injected in a state in which the body part 5, the head part 3, and the cap 32 are integrally molded, the production of the product can be made quickly. It is possible to have the advantage of not having to eject the cap 32 separately.

Then, when the injection operation is completed in the above state, the mold apparatus in the open state must be closed again, which is to be supported by the respective molds as opposed to the opening time, so that the next molding work is waiting for the present embodiment. In addition, as the mold opening and closing operations of the mold are continuously performed repeatedly, the manufacturing work of the tube 1 in which the cap 32 is integrally formed is also quickly made to enable mass production.

In addition, even in the case of the present embodiment, the size of the rotating core 33 and the inner and outer cores (27), (27) formed by differently forming and using the tube 1 is also different in shape and size, respectively Of course, the thickness of the body portion 5 of the tube 1 product formed according to the above embodiment is also manufactured in the same thickness as the former embodiment in consideration of elasticity.

As described above, according to the present invention, since a single injection molding machine (molding apparatus) can form a tube in which the head part and the body part are integrally formed, or a tube including a cap for sealing the head part in one injection step, the conventional injection step Compared to the manufacturing process through the extrusion process and the bonding process, the work process and time according to the tube manufacturing are greatly shortened, and the mass production of the tube can be made quickly, and the cost reduction of the product can be expected.

The present invention has been described with reference to the accompanying drawings, but is not limited thereto, and many modifications and changes may be made without departing from the scope of the following claims.

Claims (8)

It has a hole (7) for taking out the contents, the male screw (2) for the coupling of the cap is spoken with the head portion 3 formed on the outer circumferential surface, and one side of the head portion (3) to fill the contents It consists of a body part 5 having an opening 4 for the head part and the body part 5 constituting the tube is characterized in that the injection molding integrally the head part and the body part integrally injection Plastic tube to be molded. According to claim 1, wherein the upper surface of the head portion 3 comprises a cap 32 for screwing and sealing the head portion 3, the cap 32 is a head portion constituting a tube (3) and the plastic tube which is integrally injection molded with the head part and the body part, characterized in that it is injection molded simultaneously with the body part (5). The fixed side mold (8) having the nozzle bush (12) provided on the fixed side attachment plate (11) and the fixed side mold (8) are selectively opened and closed by a predetermined distance, and the nozzle bush is formed therein. Is located between the movable side mold (9), which is provided with an inner core (28) and an outer core (27) for forming the body of the tube, and the base plates (17, 24) of the respective molds (8, 9). It consists of a pair of slider core 10 which is opened and closed in accordance with the operation of the cylinder 29 to form the head portion of the tube is characterized in that the injection molding the tube in which the head portion 3 and the body portion 5 is integrally formed Tube manufacturing equipment. 4. The method according to claim 3, wherein when the stationary side mold (8), the movable side mold (9), and the slider core (10) are closed to each other, the same shape as that of the tube form including the head portion (3) and the body portion (5) Tube manufacturing apparatus, characterized in that configured to provide a molding space. The inner main surface of the slider core (10) according to claim 3, wherein the male portion forming portion (30,35) and the gate forming surface (31,37) for the male portion (2) for the head portion (3) are formed to correspond, respectively. Tube manufacturing apparatus characterized in that. 4. The fixed side mold (8) of the mold apparatus according to claim 3, wherein the rotatable core (33) for forming the inner surface of the cap (32) of the tube (1) is rotatably installed so that the head portion (3) is provided. Tube manufacturing apparatus characterized in that the tube including the cap 32 is configured to be integrally injection molded. 4. The nozzle bush (12) according to claim 3, wherein the nozzle bush (12) is installed on the movable side attachment plate (20) of the movable side mold (9) and is formed through the runner (34) communicating with the central portion of the inner core (28). Tube manufacturing apparatus, characterized in that the injection is supplied through the resin inner core (28). The inner and outer cores 28 and 27 and the pair of slider cores 10 of the rotating core 33 of the stationary side mold 8 and the movable side mold 9 when the mold apparatus is closed. Tube manufacturing apparatus, characterized in that configured to form a molding space of the same shape as the tube form is provided integrally by the cap (32).