JPH10315269A - Adapter unit and resin supply unit for injection molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate resin change or color change. SOLUTION: The adapter unit 20 is used by vertically mounting a main duct 23 above a heating cylinder 1 by utilizing a flange 22 for mounting the cylinder, mounting a main hopper 3A at a flange 21 for mounting the main hopper of the duct 23 and mounting an auxiliary hopper 3C at an auxiliary hopper mounting flange 24. The hoppers 23 and 3C are switched by opening/ closing shutters 6a, 6b. And, resins retained in the hoppers 3C, 23 and an auxiliary duct 25 are removed by removing a cap 26 of a drawing duct 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an adapter device used for a resin supply device of an injection molding machine and a resin supply device using the adapter device.

[0002]

2. Description of the Related Art FIG. 10 shows a resin supply device for an injection molding machine.
The following are known. In this resin supply apparatus, a hopper 3 is fixed to a support member 2 such as an injection cylinder on which a heating cylinder 1 is supported by attaching a mounting flange 4 thereof with bolts 5 and a shutter mounted on the mounting flange 4 so as to be openable and closable. 6, the resin material in the hopper 3 is supplied to the supply hole 2
a, 1a, it can be supplied to the heating cylinder 1. Reference numeral 7 denotes a screw, which is inserted into the heating cylinder 1 so as to be rotatable in the circumferential direction and movable in the axial direction. Reference numeral 3a denotes a viewing window provided in the hopper 3.

[0003] In an injection molding machine, when there is a risk that the resin may be decomposed or deteriorated when the molding operation is stopped or stopped, or when the resin or color is changed, a heating cylinder is usually used. It is necessary to put a purge material (replacement resin) or a cleaning agent into the inside 1, remove the resin remaining on the inside of the heating cylinder 1 and the outer periphery of the screw 7, and clean it.

In the general resin supply apparatus shown in FIG. 10, since there is only one hole 2a, 1a for supplying the resin in the hopper 3 to the heating cylinder 1, a purge material and a cleaning agent are put into the heating cylinder 1. At this time, the resin in the hopper 3 is taken out, the hopper 3 is emptied, and then a purge material or the like is put into the hopper 3 and supplied to the heating cylinder 1 through the supply holes 2a and 1a. It has to be removed and a purge material or the like must be directly introduced into the heating cylinder 1 through the supply holes 2a, 1a, which takes time and labor.

In the molding of PFA resin or PEEK resin, which extremely dislikes the incorporation of foreign materials, the molding conditions are determined by using pulverized materials such as sprues and runners, and then only the purge material is used without using any pulverized materials. Performs main molding (main production). Therefore, the same complicated work as the cleaning work inside the heating cylinder 1 is required, and much more labor and time are required. In addition, if the above operation takes a long time, the resin staying in the heating cylinder 1 is thermally degraded, causing resin burning, and it is not possible to smoothly shift from the condition setting molding to the main molding. There is a problem.

Therefore, as shown in FIG. 11, a slide plate 10 provided with two hoppers 3A and 3B is slidably attached to a base 11 on a support member 2 while other hoppers are in use. The hopper can be cleaned and the next resin can be filled therein (for example, Japanese Patent Laid-Open No. 2-70413), or two supply holes are formed in the support member 2 in a V-shape or Y-shape. And each hopper is fixed to a support member by connecting a different hopper to each supply hole (Japanese Utility Model Publication No. 5-20512, Japanese Unexamined Patent Publication No. 2-286).
213) has been developed.

According to these resin supply devices, the above-mentioned problems of the resin supply device of FIG. 10 can be alleviated. In FIG. 11, reference numeral 10a denotes the slide plate 1.
A supply hole 11a is formed in the base 11, and a supply hole 11a is formed in the base 11. Other structures are the same as those of the resin supply device of FIG. 10, and therefore, the same reference numerals are given and detailed description is omitted.

[0008]

However, the former resin supply apparatus based on FIG. 11 has the following problems. a) For example, in a large-sized injection molding machine having a mold clamping force of 150 tf or more, the main hopper naturally becomes large and the weight when the resin is charged becomes very heavy (may be 50 kg or more). )), Slide plate 1 by hand
0 cannot be moved. For this reason, a dedicated driving device such as an air cylinder for moving the slide plate 10 is required, and the device is accordingly expensive. The above point is not solved even if one hopper such as a purge material or a crushed material that uses only a small amount is made small. b) Move the slide plate 10 to use the hopper 3
When switching between A and 3B, the resin adhering to the supply holes 10a of the slide plate 10 is carried out and scattered outside the molding machine. c) The resin is caught between the slide plate 10 and the base 11 and is easily mixed into another resin as a foreign substance.

The latter resin supply device has the following problems. d) The structure in which two supply holes are formed in the supporting member which forms the core of the injection unit, the injection molding machine itself becomes special, and it is necessary to redesign the whole and comprehensively. There is. e) When it becomes necessary to completely remove the residual resin in each hopper, each hopper must be disassembled.

An object of the present invention is to provide an adapter device for an injection molding machine that can manufacture a high-performance resin supply device at low cost. Another object of the present invention is to provide an adapter device for an injection molding machine that can easily improve an existing resin supply device. Another object of the present invention is to provide a resin supply device of an injection molding machine that can promptly deal with resin change, color change, and the like.
Still another object of the present invention is to provide a resin supply device of an injection molding machine capable of easily removing residual resin in a fixed hopper. Still another object of the present invention is to provide a resin supply device of an injection molding machine which can prevent scattering of a resin, a cleaning agent and the like outside the machine.

[0011]

In order to achieve at least one of the above objects, the present invention is directed to a main duct having a main hopper mounting flange at an upper end and a heating cylinder mounting flange at a lower end. The auxiliary duct provided with an auxiliary hopper mounting flange at the upper end and the extraction duct provided with an opening / closing tool were connected to the side face.

In the adapter device of this injection molding machine, the main duct is vertically mounted above the heating cylinder using the mounting flange for the heating cylinder, the main hopper is mounted on the main hopper mounting flange of the main duct, and the auxiliary hopper is mounted on the main duct. An auxiliary hopper is attached to the mounting flange and used. Therefore, there is no need to form a supply hole for the auxiliary hopper in the support member of the heating cylinder. The most common way to fix the main duct to the heating cylinder is to attach the heating cylinder mounting flange directly to the supporting member of the heating cylinder and fix it. A method can be adopted.

The extraction duct is used for extracting resin, cleaning agent, and the like left in the main hopper and the auxiliary hopper. The opening / closing member may be a cap detachably screwed to the lower end of the extraction duct, a damper rotatably supported on a shaft, or the like. When there is a difference in size between the main hopper and the auxiliary hopper, the smaller one is usually used as an auxiliary hopper and used as a purge material, a crushed material, or a cleaning agent.

Preferably, the extraction duct is connected to the lower side surface of the main duct below the auxiliary duct. In this case, the residual amount of the resin and the like left at the lower portion of the main duct when the resin and the like in each hopper are extracted is reduced.
In some cases, the connection position of the auxiliary duct to the main duct can be set to be equal to or less than the connection position of the extraction duct. Also, the connection of the auxiliary duct and the extraction duct to the main duct may be the same position in plan view of the main duct,
Different positions can be used.

A shutter can be provided on at least one of the main hopper mounting flange, the heating cylinder mounting flange, and the auxiliary hopper mounting flange. This eliminates the need to provide a shutter on the heating cylinder or the main hopper or the auxiliary hopper attached to the mounting flange provided with the shutter, and allows the adapter device to be used in a wider range.

According to a fourth aspect of the present invention, in the resin supply device, the main duct of the adapter device having the above-described configuration is heated by heating the mounting flange for the heating cylinder while the communication hole is in communication with the supply hole of the heating cylinder. It is fixed directly or indirectly to the cylinder and stands up above the heating cylinder, and the main hopper is attached to the main hopper mounting flange of the main duct, and the auxiliary hopper is attached to the auxiliary hopper mounting flange. The shutter was provided in the portion.

In the above resin supply device, switching between the main hopper and the auxiliary hopper is performed by opening and closing the shutters. In addition, the resin and the like remaining in the main hopper and the auxiliary hopper, and the main duct and the auxiliary duct are extracted by opening the opening and closing tool of the extraction duct. The main hopper and auxiliary hopper are fixed in place and do not need to be moved,
There is no need for a moving drive device, and no resin or the like is mixed into other resins as foreign matter, nor is it carried outside the machine and scattered.

[0018] The adapter device of the resin supply device may be an adapter device provided with a shutter on at least one of the main flange, the heating cylinder mounting flange, and the auxiliary hopper mounting flange. . Further, a drying device can be attached to the main hopper (claim 6).

[0019]

Embodiments of the present invention will be described with reference to the drawings. 1 to 4 show an embodiment of the present invention. In these figures, reference numeral 20 denotes an adapter device. The adapter device 20 includes an auxiliary duct 25 having an auxiliary hopper mounting flange 24 welded to a tip thereof, a side surface of a main duct 23 having a main hopper mounting flange 21 welded to an upper end and a heating cylinder mounting flange 22 being welded to a lower end. An extraction duct 27 in which a cap (opening / closing tool) 26 is detachably screwed into the opening at the tip is connected by welding, and a shutter 28 is provided on the heating cylinder mounting flange 22.
The shutter 28 opens and closes the lower end of the communication hole 23a of the main duct 23, and is slidably inserted into a slit provided on one side of the heating tube mounting flange 22.

Each of the ducts 23, 25, 27 is formed in a cylindrical shape having a circular cross section. The extraction duct 27 is connected to the lower side surface of the main duct 23 in a state where the base end is inclined downward, and The duct 25 is connected to the side surface of the main duct 23 in a state in which the front end is inclined above the extraction duct 27, and the front end is bent vertically upward. Screw holes 21 in mounting flanges 21 and 24
a and 24a are provided, and the other mounting flange 22 is provided with a mounting hole 22a. The auxiliary duct 25 and the extraction duct 27 are arranged at positions on the same line in the diameter direction of the main duct 23 in plan view of the main duct 23, but may be arranged at positions on different lines in the diameter direction.

The resin supply device for an injection molding machine according to the present invention uses the adapter device 20 having the above-described structure to connect the supporting member 2 to the main duct 23 by using the mounting flange 22 for the heating cylinder.
On the upper surface of the main hopper, the main duct 23 is set up vertically and the communication hole 23a of the main duct 23 is connected to the supply hole 2a, and the main duct 23 is indirectly fixed to the heating cylinder 1.
1 and a main hopper 3A, and an auxiliary hopper 3C is mounted on the auxiliary hopper mounting flange 24.

The mounting flange 22 is mounted on the support member 2 by inserting a bolt (not shown) into the mounting hole 22a of the mounting flange 22 and screwing it into a screw hole (not shown) of the support member 2. And mounting flange 2
1 and the auxiliary hopper 3C to the mounting flange 24 are attached to the respective hoppers 3A and 3C.
Bolts are inserted through mounting holes (not shown) provided in the mounting flanges 4a and 4b, respectively.
This is performed by screwing into the 24 screw holes 21a and 24a. Therefore, the adapter device 20 is detachable with respect to the support member 2, and each hopper 3A, 3C is detachable with respect to each of the mounting flanges 21, 24. The adapter device 20 is an injection molding machine of a type in which a resin supply device (hopper) is attached to the heating cylinder 1 without the support member 2 interposed therebetween.
The mounting flange 22 of the main duct 23 is directly fixed to the mounting seat provided on the heating cylinder 1. The hopper 3A and the auxiliary hopper 3C
The shutters 6a and 6b having the same structure as the shutter 28 provided on the heating tube mounting flange 22 of the main duct 23 are provided on the mounting flanges 4a and 4b, respectively.
The shutters 6a and 6b may be provided on the mounting flanges 21 and 24 on the main duct 23 and the auxiliary duct 25 instead of being provided on the mounting flanges 4a and 4b on the hoppers 3A and 3C. When the main duct 23 is directly attached to the support member 2 or the heating cylinder 1 instead of being provided on the attachment flange 22 of the main duct 23,
It may be provided in the heating cylinder 1.

The same members and the like as those shown in FIGS. 10 and 11 are denoted by the same reference numerals, and detailed description thereof will be omitted.

Next, an example of a method of using the resin supply device of the injection molding machine having the above configuration will be described with reference to FIGS. FIG. 5 shows a state in which the molding conditions are determined using the pulverized material in the auxiliary hopper 3C, and then the resin of the main hopper 3A is supplied to the heating cylinder 1 to perform the molding. At this time, the shutter 6b of the auxiliary hopper 3C is closed, the extraction duct 27 is closed by the cap 26, and the shutter 6a of the main hopper 3A and the shutter 28 on the heating cylinder 1 side are open.

When the molding is completed, the shutter 6a of the main hopper 3A and the shutter 28 on the side of the heating cylinder 1 are closed. When molding another product of the same resin by exchanging the mold, the cap 26
Is removed, the extraction duct 27 is opened, and the resin in the main duct 23 is extracted (see FIG. 6). In this case, it is convenient to use the container 31. After the extraction of the resin is completed, the extraction duct 27 is closed with the cap 26.

Next, the auxiliary hopper 3C and the shutters 6b and 28 on the side of the heating cylinder 1 are opened to supply the pulverized material in the auxiliary hopper 3C to the heating cylinder 1 (FIG. 7). Do.

After the completion of the condition setting, the shutter 6b of the auxiliary hopper 3C is closed, the cap 26 is removed from the extraction duct 27, and the crushed material in the auxiliary duct 25 and the main duct 23 is extracted outside (FIG. 8). Then, the extraction duct 27 is connected to the cap 2
6, the shutter 6a of the main hopper 3A is opened (FIG. 5), and the next product is formed.

When the resin or color is changed, the shutter 28 on the side of the heating cylinder 1 shown in FIG.
And removes the residual resin in the main hopper 3A and the main duct 23 from the extraction duct 27 (in a state where the shutter 6a of the main hopper 3A is open in FIG. 6), and in the auxiliary hopper 3C in the operation of FIG. When one resin pulverized material remains, the shutter 6b is opened and the auxiliary duct 25 is opened.
Then, the remaining pulverized material is extracted from the extraction duct 27 via the main duct 23. Then, the shutters 6a and 6b are closed, another resin is put in the main hopper 3A, and a crushed material of another resin is put in the auxiliary hopper 3C as a purge material (replacement material). And purge material into the main duct 23
, And supplied to the heating cylinder, and a purging operation for replacing one resin remaining in the heating cylinder 1 with another resin is performed. After the purging operation is completed, subsequently, conditions for another resin molded product are determined in the same manner as described above. Thereafter, molding with another resin is performed in the same manner as in the operations of FIGS.

The resin can be supplied from the auxiliary hopper 3C to the heating cylinder 1 to perform molding, or a pulverizing material or a cleaning agent can be charged into the main hopper 3A to determine the molding conditions and perform cleaning.
The procedure for opening and closing the shutters 6a and 6b, switching of the hoppers 3A and 3C, and the like can be variously changed according to the type of resin, cleaning conditions, and the like, and are not limited to the above.

A drying device 29 can be attached to the main hopper 3A as shown in FIG. The drying device 29 is for drying the resin.

[0031]

As described above, the adapter device for an injection molding machine according to the present invention has a main hopper mounting flange at the upper end and a heating duct mounting flange at the lower end. The auxiliary duct with the mounting flange for the auxiliary hopper and the extraction duct with the opening and closing device are connected to each other, so the main hopper and auxiliary hopper can be simplified without special processing on the heating cylinder side In addition, an easy-to-handle resin supply device can be obtained at low cost, and an existing resin supply device can be easily improved.

When the extraction duct is connected to the lower side surface of the main duct below the auxiliary duct, the amount of resin and the like remaining at the lower portion of the main duct when extracting the resin and the like can be reduced. When a shutter is provided on at least one of the main hopper mounting flange, the heating cylinder mounting flange, and the auxiliary hopper mounting flange, the heating cylinder, the main hopper, or the auxiliary hopper mounted on the mounting flange provided with the shutter. Since no shutter is required, the adapter device can be used widely.

Further, in the resin supply device for an injection molding machine according to the present invention, the main duct of the adapter device may connect the mounting flange for the heating cylinder to the heating cylinder with the communication hole communicating with the supply hole of the heating cylinder. The main hopper is attached to the main hopper mounting flange of the main duct, and the auxiliary hopper is mounted to the auxiliary hopper mounting flange. Since the shutter is provided in the portion, the two hoppers can be easily switched, and the resin or the like can be easily extracted. Therefore, it is possible to quickly and accurately deal with resin change, color change, cleaning, and the like. In addition, since the main hopper and the auxiliary hopper are fixed at predetermined positions and do not need to be moved, unlike a conventional resin supply device in which two hoppers are attached to a slide plate and are movable, a moving driving device is not required. Yes, that can reduce costs. Further, there is no possibility that the resin or the like is mixed into another resin as a foreign substance, and is not carried out of the apparatus and scattered.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a resin supply device of an injection molding machine according to the present invention.

FIG. 2 is a sectional view of an adapter device of the injection molding machine according to the present invention.

FIG. 3 is a plan view of the adapter device of FIG. 2;

FIG. 4 is a bottom view of the adapter device of FIG. 2;

FIG. 5 is a cross-sectional view showing a supply state of a resin put in a main hopper.

FIG. 6 is a cross-sectional view showing a state in which the resin in the main duct is extracted.

FIG. 7 is a cross-sectional view showing a supply state of a pulverized material put in an auxiliary hopper.

FIG. 8 is a cross-sectional view showing a state in which the crushed material in the main duct and the auxiliary duct is extracted.

FIG. 9 is a diagram of a resin supply device provided with a drying device.

FIG. 10 is a sectional view of a resin supply device of a conventional general injection molding machine.

FIG. 11 is a cross-sectional view of an improved conventional resin supply device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Heating cylinder 1a, 2a Supply hole 2 Support member 3A Main hopper 3C Auxiliary hopper 6a, 6b Shutter 20 Adapter device 21 Main hopper mounting flange 22 Heating cylinder mounting flange 23 Main duct 23a Communication hole 24 Auxiliary hopper mounting flange 25 Auxiliary Duct 26 Cap (opening / closing tool) 27 Extraction duct 28 Shutter 29 Drying device

Claims (6)

[Claims] 1. A side surface of a main duct having a main hopper mounting flange at an upper end and a heating cylinder mounting flange at a lower end,
An adapter device for an injection molding machine, wherein an auxiliary duct having a mounting flange for an auxiliary hopper at an upper end and a removal duct having an opening / closing tool are connected respectively. 2. The adapter device for an injection molding machine according to claim 1, wherein the extraction duct is connected to a lower side surface of the main duct below the auxiliary duct. 3. The adapter device for an injection molding machine according to claim 1, wherein a shutter is provided on at least one of the mounting flange for the main hopper, the mounting flange for the heating cylinder, and the mounting flange for the auxiliary hopper. . 4. The main duct of the adapter device according to claim 1, wherein the mounting flange for the heating cylinder is fixed directly or indirectly to the heating cylinder in a state where the communication hole communicates with the supply hole of the heating cylinder. Standing above the heating cylinder, the main hopper was mounted on the main hopper mounting flange of the main duct, the auxiliary hopper was mounted on the auxiliary hopper mounting flange, and a shutter was provided on each of the mounting flanges. A resin supply device for an injection molding machine, characterized in that: 5. The resin supply device for an injection molding machine according to claim 4, wherein the adapter device according to claim 3 is used. 6. The resin supply device for an injection molding machine according to claim 4, wherein a drying device is attached to the main hopper.