JP2006056166A - Molding equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide molding equipment which improves the operation efficiency in the molding by equalizing the working time on the injection portion and the one on the taking-out portion and which can reduce the installation expenditure. <P>SOLUTION: The molding equipment 1 is equipped with an upper die 3 and a lower die 4 that make a cavity 41 into which a resin is injected and which forms a molded product 10, an injection portion 5 which pressurizes/presses the upper and lower dies 3, 4 and injects the resin, a taking-out portion 6 which holds the upper and lower dies as one body and takes out the molded product in the inside after opening the upper and lower dies, and a conveying portion 7 which moves/conveys the upper and lower dies between the injection portion and the taking-out portion. For the lower die a holder 8 is equipped which holds with a predetermined load the upper and lower dies as one body, and the upper and lower dies held by the holder are moved as they are between the injection portion and the taking-out portion. For the taking-out portion a holding portion 9 is provided which holds the upper die 3 that has been opened. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a molding apparatus for injection molding a thermoplastic resin.

  In a conventional thermoplastic resin molding apparatus, the upper and lower molds are integrally held by the molding apparatus main body or the conveying section, and the molten resin is injected into the cavity while the upper and lower molds are pressed and pressed by the injection section. The resin was pressed and held in the cavity until the resin was in a predetermined cured state. In the case where the injection part and the take-out part of the conventional molding apparatus are the same, a good molded product is obtained by molding in such a molding time.

However, when the injection part and the take-out part are the same as described above, there are disadvantages that the molding time is long and the molding efficiency is poor.
Therefore, there is a conventional molding apparatus 1 having an injection unit 5 and a take-out unit 6 as shown in FIG. In this molding apparatus 1, the upper die 3 and the lower die 4 are clamped at the injection portion 5, and the molten resin is injected and filled into the cavity formed by the upper die 3 and the lower die 4. The resin is pressed and held until the resin is cured, and when the resin is cured, the upper mold 3 is lifted to open the upper and lower molds 3 and 4. Another lower mold 4 is conveyed to the injection unit 5 where a molded product is taken out. Thus, in this conventional molding apparatus 1, one upper mold 3 is provided in the injection part 5, whereas two lower molds 4 are provided, and the injection part 5 and the take-out part alternately. 6 is circulated and conveyed between the two.

  However, even in this conventional molding apparatus in which the injection part and the take-out part are separately provided, the place where the upper and lower molds are kept pressed and pressed exists only in the injection part, so that the time for stopping in the injection part becomes longer. Therefore, there is a problem that the time at the take-out section is short and the operation efficiency is deteriorated.

  The present invention has been made in view of the above problems, and its purpose is to make the working time in the injection part and the take-out part the same so as to improve the operating efficiency of the molding and reduce the equipment cost. It is to provide a molding apparatus that can be used.

As a means for solving the above-mentioned problems, the present invention provides a molding apparatus described in each of the claims.
The molding apparatus according to claim 1 includes an upper mold and a lower mold that create a space for injecting a resin therein to form a molded product, an injection unit that presses and presses the upper and lower molds to inject and inject the resin, The upper mold and the lower mold are held together, and the upper and lower molds are opened, the take-out section for taking out the molded product inside, and the transport section for moving the upper and lower molds between the injection section and the take-out section are provided. A holding tool for integrally holding the upper and lower molds with a predetermined load is provided on the mold or the lower mold, and the upper and lower molds held by the holding tool are moved between the injection part and the take-out part in this state. As a result, when the resin after molding is cooled and cured, it can be held by the upper and lower molds without being pressed and pressed at the injection part. After the injection molding, the upper and lower molds are taken out from the injection part and cooled and cured at the take-out part. Since the cooling and curing time can be shared between the injection unit or the conveyance unit and the take-out unit, the molding time can be shortened and the molding efficiency is improved. Moreover, it is not necessary to provide a mold opening / closing mechanism in the injection part, and the equipment cost can be reduced.

The molding apparatus according to claim 2 further includes one take-out portion having a similar structure, whereby the injection portion has two take-out portions for one, and two sets of upper and lower molds When taking out a molded product or cooling and curing at one take-out part, the other take-out part can perform operations such as insertion of insert parts, which is necessary for a series of molding work. The molding time can be evenly allocated to the injection part and the two extraction parts, and the molding time can be further reduced.
The molding apparatus according to the third aspect is arranged such that the two take-out parts sandwich the injection part, thereby shortening the transport distance between the upper and lower molds and shortening the transport time.

According to a fourth aspect of the present invention, the take-out part opens the upper and lower molds to have a holding part for holding the upper mold, whereby the upper and lower molds can be closed and opened by the take-out part itself. It is something that can be done.
The molding apparatus according to claim 5 is configured such that the take-out portion can open the upper and lower molds and take out the molded product, and can also insert the insert parts into the lower mold and insert the insert parts to close the upper and lower molds. Thus, the two extraction units can alternately repeat these operations, and the efficiency of the operations can be improved.

  According to the sixth aspect of the present invention, the toggle structure is adopted as the structure for holding the upper and lower molds of the holding tool, whereby the upper and lower molds can be firmly fastened and held with a simple structure.

  Hereinafter, a molding apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an overall configuration of a molding apparatus according to an embodiment of the present invention. The molding apparatus 1 according to the present invention includes a molding apparatus body 2 as a base, an upper mold 3 for forming a space (cavity) 41 in which a resin is injected to form a molded product 10, and a resin is injected into the mold. A lower mold 4 for forming a space (cavity) 41 for forming the product 10, an injection part 5 provided on the molding apparatus main body 2 for pressurizing and pressing the upper and lower molds 3, 4 and injecting resin, and an upper and lower mold 3 , 4 and a take-out section 6 for taking out the molded product 10 inside, and a transport section 7 for moving and transporting the upper and lower molds 3, 4 between the injection section 5 and the take-out section 6. In FIG. 1, two take-out portions 6 having the same structure are provided so as to sandwich the injection portion 5, but one take-out portion 6 may be provided. FIG. 1 shows a state in which the molded product 10 is taken out by one take-out part 6 and a state in which the insert part 11 is inserted in the other take-out part 6.

2 (a) shows the upper and lower molds, FIG. 3 (b) shows the molded product, FIG. 3 shows a holder for holding the upper and lower molds together, and FIG. 4 shows the upper mold opened. Each holding mechanism is shown.
As shown in FIGS. 2A and 3, an upper surface of the upper die 3 is provided with an injection port 31 for injecting a molten resin, and a detailed description will be given later on the peripheral side surface of the upper die 3. A groove-like engaging portion 32 is formed. Although not shown, a space (cavity) for forming the molded product 10 is also formed in the upper mold 3, and the molded product 10 cooperates with a space (cavity) 41 formed in the lower mold 4. A cavity space 41 is formed to form FIG. 2A shows the upper mold 3 and the lower mold 4 and the integrated upper and lower molds 3 and 4 before integration. Further, the molded product 10 includes an insert part 11, and the insert part 11 is set in the lower mold 4 of the open mold.

  As shown in FIG. 3, the lower mold 4 is provided with a holder 8 for holding the upper mold 3 and the lower mold 4 together. The holder 42 has a toggle structure, and the upper die 3 and the lower die 4 are firmly integrated by the claw 81 of the holder 42 being fastened and engaged with the engaging portion 32 of the upper die 3. Pressed and held. By engaging and retracting the claw 81 back and forth, engagement and disengagement are performed. 3A shows a state before the upper die 3 and the lower die 4 are fastened, and FIG. 3B shows a state where the upper die 3 and the lower die 4 are fastened by the holder 8 and integrated. However, FIG. 3C shows the holder 8. 1 and 3, the holder 8 is provided on the lower mold 4. However, the holder 8 may be provided on the upper mold 3. In that case, the engaging portion is naturally provided on the lower mold. In addition, although a toggle structure is described as the holder 8, any fastening structure can be adopted as long as the upper and lower molds can be fastened and engaged with a predetermined load.

  FIG. 4 shows the structure of the holding part 9 provided on the take-out part 6. The holding portion 9 is erected on the take-out portion 6, and a hooking tool 92 is suspended from an upper member 91 so as to be movable up and down. An elevating mechanism 93 such as a cylinder for elevating and lowering the hooking tool 92 is provided on the upper member 91, and guide members 94 fixed to the hooking tool 62 are provided on both sides of the elevating mechanism 93. Therefore, when the integrated upper and lower molds 3, 4 conveyed to the take-out part 6 are released from the fastening by the holder 8, the hooking tool 92 of the holding part 9 is lowered to engage the engaging part of the upper mold 3. The upper die 3 and the lower die 4 can be opened by engaging the hook 32 and raising the hook 92 while lifting the upper die 3 in this engaged state. When the upper mold 3 and the lower mold 4 are opened, an operation of taking out the molded product 10 from the lower mold 4 and an operation of inserting the insert part 11 into the lower mold 4 are performed.

  When the insertion work of the insert part 11 into the lower mold 4 is finished, the hooking tool 92 that engages and holds the upper mold 3 is lowered, and the engagement of the hooking tool 92 is released by being combined with the lower mold 4. The tool 92 rises as it is. Thereafter, the upper die 3 and the lower die 4 are integrally held by a holder 8 with a predetermined load.

The conveyance unit 7 is configured by a conveyor or the like, and conveys the upper and lower molds 3 and 4 integrated by the holder 8 from the take-out unit 6 to the injection unit 5 or from the injection unit 5 to the take-out unit 6.
In the injection unit 5, the injection nozzle 51 of the injection unit 5 is set in the resin injection port 31 of the upper and lower molds 3 and 4, and molten resin is injected into the cavity 41 of the upper and lower molds 3 and 4 from the injection nozzle 51. Filled. The upper and lower molds 3 and 4 filled with the molten resin may be immediately transported to the take-out section 6 in this state, where the resin may be cooled and cured, or cooled by the injection section 5 or the transport section 7 for a predetermined time. Curing can also be performed.
In the take-out part 6, the upper and lower molds 3, 4 integrated as described above are released from being held by the holder 8, the mold is opened by the hooking tool 92 of the holder 9, and the cooled and hardened molded article 10 is taken out. After the molded product 10 is taken out, after inserting the insert part 11 into the lower mold 4, the upper and lower molds 3 and 4 are closed in the reverse process to the above, and the integrated upper and lower molds 3 are combined. , 4 are conveyed to the injection unit 5.

The operation of the molding apparatus of the present invention having the above configuration will be described.
First, the upper die 3 and the lower die 4 from which the holder 8 is released are positioned and set in one take-out portion 6. Next, the hook 92 of the holding part 9 is engaged with the engaging part 32 of the upper mold 3 to lift the upper mold 3. In this state, the insert part 11 is inserted into the lower mold 4. When the insert part 11 is set in the cavity 41 of the lower mold 4, the upper mold 3 is lowered and the engagement of the hooking tool 92 is released. The hook 92 is lifted as it is. Next, the claw 81 of the holder 8 is engaged with the engaging portion 32 of the upper mold 3, and the upper mold 3 and the lower mold 4 are fastened and held together. The integrated upper and lower molds 3 and 4 are conveyed to the injection unit 5 by the conveyance unit 7.

Next, the upper and lower molds 3, 4 integrated by the holder 8 are positioned on the injection part 5, and the injection nozzle 51 is set in the injection port 31 of the upper and lower molds 3, 4. Next, the injection part 5 injects molten resin into the cavities of the upper and lower molds 3, 4 while pressing the upper mold 3 against the lower mold 4.
Next, the integrated upper and lower molds 3 and 4 filled with the resin are taken out from the injection part 5 and left in this state for a predetermined time to cool and cure the resin. This cooling and curing may be performed while stopping on the transport unit 7, may be performed by the take-out unit 6, or may be performed by the injection unit 5 for a short time depending on circumstances. However, when performing in the injection | pouring part 5, it is necessary to cut | disconnect the injection nozzle 51 from the injection port 31. FIG. In this cooling and curing step, the integrated upper and lower molds 3 and 4 may be temperature controlled using a known mold temperature control mechanism.

Next, after the predetermined time has elapsed, when the temperature becomes equal to or lower than a certain temperature, the other take-out portion 6 is positioned, the holding tool 8 is released, and the upper die 3 is engaged with the hook 92 so that the upper die 3 is engaged. Is lifted to open the upper mold 3 and the lower mold 4, and the molded product 10 including the insert part 11 is taken out from the lower mold 4.
In this way, the upper and lower molds 3 and 4 can be transported in an integrally held state, and the two can be separated from each other. Therefore, the injection unit 5 quickly takes out the resin after injecting the resin and puts it in the next mold. Can be injected.
In addition, by providing two take-out parts so that both take-out work of molded products and insert parts can be inserted in the take-out part, two sets of upper and lower molds are used, and they are alternately distributed to both take-out parts. As a result, it is possible to superimpose the time for the take-out operation and the insertion operation, and the molding time can be shortened.

  As described above, in the present invention, the holding tool for holding the upper and lower molds independently with a predetermined load is provided, the injection part and the take-out part are separated, and the upper and lower molds can be moved integrally between them. By making the holder and the toggle structure, the working time in the injection part and the take-out part can be made the same, the molding time can be shortened and the molding efficiency can be improved. There is no need to provide it, and there is an effect that the equipment cost of the molding apparatus can be reduced.

It is a perspective view which shows the whole structure of the shaping | molding apparatus of embodiment of this invention. (A) has shown the front and back of the combination of an upper mold | type and a lower mold | type, (b) is the figure which shows the state in each type | mold of a molded article and insert components. (A) is a perspective view illustrating a state before the upper mold and the lower mold are integrated, (b) is an integrated upper and lower mold state, and (c) is a perspective view illustrating the holder. It is a perspective view of the holding part which engages with an upper model. It is a perspective view which shows the whole structure of the conventional shaping | molding apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Molding apparatus 2 Molding apparatus main body 3 Upper mold 31 Inlet 32 Engagement part 4 Lower mold 41 Space (cavity)
DESCRIPTION OF SYMBOLS 5 Injection part 51 Injection nozzle 6 Take-out part 7 Conveyance part 8 Holder 81 Claw 9 Holding part 92 Hook part 93 Lifting mechanism 10 Molded article 11 Insert part

Claims (6)

A molding apparatus body as a base;
An upper mold and a lower mold that create a space for injecting resin inside to form a molded product
An injection part that presses and presses the upper and lower molds to inject and inject resin
The upper mold and the lower mold are held together, and the upper and lower molds are opened to take out an internal molded product, and
In a molding apparatus comprising a transport unit that moves and transports the upper and lower molds between the injection unit and the take-out unit,
The upper mold or the lower mold is provided with a holding tool for holding the upper and lower molds integrally with a predetermined load, and the upper and lower molds held by the holding tool can move between the injection part and the take-out part in that state. The molding apparatus characterized by being.   The molding apparatus according to claim 1, further comprising one take-out portion having a similar structure.   The molding apparatus according to claim 1, wherein the two take-out parts are arranged so as to sandwich the injection part.   The molding apparatus according to claim 1, wherein the take-out part has a holding part that opens the upper and lower molds and holds the upper mold.   After the take-out part opens the upper and lower molds and takes out the molded product, the insert part is inserted into the lower mold, the upper and lower molds are closed again, and the upper and lower molds are supplied to the injection part. The molding apparatus according to any one of claims 1 to 4, further comprising:   The forming apparatus according to claim 1, wherein the structure for holding the upper and lower molds of the holder is a toggle structure.

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