JPH0929739A - Green air blow type pushing mechanism for pellet molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To desire the remarkable improvement of the quality characteristics of a synthetic resin molding product by cooling to solidify to desired hardness by cooling air blowing, and being capable of smoothly feeding kneaded strand. SOLUTION: Kneaded strand J introduced to the introducing hole Q' of a pushing mechanism element Q is cooled to be solidified in an extremely snort time by the cooling air blowing operation of a cooling air blowing zone Q" formed, in place, at the hole Q'. Further, it is received by the urging operation step by step by the dynamic pressure of cooling air strongly blown from the hole Q' opened at the element Q and the zone Q". As a result, the strand J can be smoothly fed. In other words, the double effects can be received.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The present invention relates to peripheral equipment for molding, which is absolutely indispensable in so-called general synthetic resin molding factories for molding. It is no exaggeration to say that this is the field of industrial application that covers all fields of general synthetic resin molding plants throughout Japan.

[0002]

2. Description of the Related Art In the past, there have been conventional so-called general synthetic resin molding factories for molding, and recently, mainly aiming at resource recycling, mainly performing precision molding mainly. In the existing molding industry, various problems are still built in regarding the method of molding by mixing crushed pieces from a runner crusher with virgin raw material for molding synthetic resin. From this point of view, while trying to use a method in which crushed pieces such as runners are separately subjected to pelletizing and reclaiming processing based on an extruder, etc., and then mixed with the above-mentioned virgin raw material for synthetic resin molding and reused. It can be said that the current situation is that it has reached the present. Therefore, the so-called regenerating device for pelletizing described above has been based on the mechanism as described above for some time, and several types of similar devices have been used in the seed industry or related markets. There are many places where you can see them on the market. However, it can be concluded that all the pellet regenerators described above have been designed and manufactured under the basic technical background described below.

That is, First of all, it can be said that all of such pellet regenerating apparatuses (machines) are extremely large in size in order to cope with a large-capacity runner process. It is quite clear that the thing was manufactured with a design intent to cope with a large-capacity runner, or several kinds or more of various kinds of runners. . In addition to the above, there are a wide variety of complex mechanisms themselves, for example, a kneading strand continuously fed from a hot screw press is once wound around a drum, and in the winding process. The conventional method has been to cool and solidify the kneaded strands by powerful blowing such as compressed air. . Therefore, while its form is inevitably large and so-called heavy and long, on the other hand, in terms of its price, it costs as much as several million yen per unit, which is expensive and of course. It was there because it exists as one of the equipment and devices in places where the volume is extremely high. . However, in the synthetic resin molding work, for example, there was an environmental condition in which it was necessary to change the color and promote the regeneration of each runner pellet for each of a wide variety of synthetic resin raw materials. Nevertheless, it was also a cause of the difficulty in realizing that.

[0003]

In the preceding paragraph, as will be described in detail, the synthetic resin molding raw material pellet molding apparatus, which is based on the conventional technology, is caused by the basic design. There are many serious problems, namely, excessive space occupied as one of the peripheral equipments for synthetic resin molding (in other words, space occupied), but high price problem caused by heavy and heavy equipment. And, moreover, the serious quality problem of molded products, which is inevitably derived from various problems, etc., etc., and any of them must be solved as quickly as possible. I was there because I was carrying today. By the way, when we examined the fundamental theme, wondering where the cause of the above-mentioned serious problems originally existed ...
I got answers about the following points. In other words, as I touched on in the previous section, it cannot be said that the existing synthetic resin raw material pellet molding method was caused by insensitivity and shallow knowledge. Of. That is, as described above, in recent years, there is a tendency to try to regenerate pellets by using a crushed piece such as a runner with an extrusion molding machine, but as described in the previous section to the section, as described in detail,
Since there is a problem in the pellet molding device itself for reprocessing the pellets that is the purpose, we decided to focus on the following points as the problem. . We will radically change the heavy, heavy and large sizes. . Regarding kneaded strand formation, the simplest mechanism is newly adopted. . According to the above item, the production cost shall be provided at a cheap price, which is not comparable to the price of the conventionally known product. Regarding cooling and solidification of the kneaded strand, a completely new system, that is, a cooling element will be adopted, and a rational and economical cooling system which is unprecedented as a peripheral device of this kind will be adopted. As mentioned above, by taking the measures to solve the problems, which consist of the items, the above-mentioned various problems have been solved all at once. However, in addition, even for each component element parts, or even the material, etc., the 3S of small, simple, and short are as basic design principles as possible.
In combination with the strong promotion, there was a big step towards solving difficult problems.

[0004]

[Means for Solving the Problems] The present invention has been made in such a way that, as described in detail in the preceding paragraph, it is the most rational and even fundamental solution to the appearance of the problem. , All the difficult problems related to the synthetic resin molding process, which are already explained in detail, are excellently cleared, and in addition, the quality problem is also clear at the same time, and further, the price is due to the simplification of the configuration. Because it is cheap and can be made small and compact,
Since it can be used as a peripheral device for existing and known publicly known synthetic resin molding machines, etc., its practical effect is immeasurable. The means for solving such a problem are as follows. That is, as described in detail in the preceding paragraph, as will be described in detail, in a synthetic resin molding raw material pellet molding apparatus based on a conventionally known technique, it is too heavy and extremely large (for example, its length or However, in the device of the present invention, the length of the device of the present invention depends on the adoption of the drive mechanism based on the winding conduction system, that is, the chain conduction. It is possible to hold down to less than half of a barrel and a conventional product. (By the way, when it comes to standard products of the company, it is almost 0.
About 6 meters). Therefore, even with regard to the method of cooling and solidifying the kneaded strand, in the conventional product, there is usually provided a step of temporarily winding the product sent out from the hot screw press into a drum. On the other hand, in the device of the present invention, due to the adoption of the completely new cooling system, the drum winding step and the like as described above are completely unnecessary, so that the working time for pellet molding is greatly increased. This is done so that the time can be shortened and the quality of the pellet itself (that is, the physical and mechanical characteristics of the pellet itself) is desired to be improved. In addition, since the device of the present invention can be housed in a metal casing, the entire device can be compact and compact. Therefore, since the device of the present invention is light, thin, short, and small, and its structure mechanism is simple, it is easy to manufacture, inexpensive, and inexpensive. Even in relatively small molding factories around that,
Immediately, it is possible to introduce and operate.

[0005]

The "cooling air blow type push mechanism for pellet molding machine" according to the present invention is constructed based on the above-mentioned means, and therefore, for example, the "cooling air blow type for pellet molding apparatus" of the present invention is used. In the case where a structure based on "push mechanism" is installed in an injection molding machine in a general synthetic resin molding factory, etc., in an appropriate place in the vicinity, the embodiment shown in Figs. Obviously, when advancing the molding process in the molding factory, the runners and sprues generated by the operation of the injection molding machine are crushed by a crusher (generally a general-purpose runner crusher is available. The runner crushed pieces are put into the hopper (H) shown in FIG. 1 (shown by a chain double-dashed line in FIG. 1) in an appropriate amount. , Said, Provided so as to face just below its passes through the chute (S) from the wrapper (H), it will be supplied to the hot-screw press (P). The runner pieces supplied to the hot screw press (P) are immediately melted by an electric heater (not shown) arranged around the circle of the hot screw press (P). , The driving force based on the rotation of the screw spindle (SS) of the hot screw press (P),
While being kneaded one by one, it finally becomes a kneaded strand (J) and is continuously and sequentially sent out. Thus,
The kneaded strands (J) that are continuously and sequentially sent out,
By passing through the nozzle (N) (of course, the one corresponding to the pellet diameter of a desired size is used) mounted facing the tip of the hot screw press (P), A kneaded strand (J) having a desired diameter is formed, and the kneaded strand (J) from the nozzle (N) is further introduced into the guide groove (G). Therefore, the kneaded strand (J) introduced into the guide groove (G) is further drooped directly downward while passing through the guide groove (G) due to the action of gravity. In the above, the introduction hole (Q ') of the cylindrical push mechanical element (Q), which is installed at the hanging tip portion of the kneading strand (J) as described above, is installed.
To be introduced to. Thus, the kneading strand (J) introduced into the introduction hole (Q ′) of the push mechanical element (Q) is cooled by the cooling air blow zone (J) formed at a proper position in the introduction hole (Q ′). Q ")
Due to the cooling air blowing action, it was cooled and solidified in a very short time in the most efficient manner from a thermodynamic standpoint, and further, the push mechanical element (Q) was perforated. Introductory hall (Q ')
Also, as a result of being forced by the dynamic pressure of the cooling air blown strongly from each of the cooling air blow zones (Q ″),
The kneaded strand (J) has a so-called double effect, that is, it enables smooth delivery. Here, the kneaded strand (J), which has been cooled and solidified to an appropriate hardness, is successively cut to an appropriate length by a rotary cutter (C) provided at a position directly below the kneaded strand (J). Then, it is said that it will be reborn as a synthetic resin raw material pellet for injection molding depending on recycled materials such as runners and sprues, and will be reused with other virgin raw materials. It should be noted that the cooling air (F) for blowing the cooling air is fixed to a proper place in the space inside the metal casing (B) as described above, for example, by an compressed air (A) air cooling unit. (E) is used, and the cooling air (F) that is sent out depending on (E) is used not only in the push mechanical element (Q) but also in the pre-cooling action ((( The flow is shown by the → mark, ↑ mark, ↓ mark, etc. in FIG. 1 and FIG. 2), and needless to say.

[0006]

EXAMPLE An example of the "cooling air blow type push mechanism for a pellet molding machine" of the present invention will be described with reference to FIGS. In this embodiment, for example, the rotary cutter (C) for cutting the kneaded strand (J) has two blades, but in general, a plurality of blades, two blades, and four blades are used. A blade, etc., may be appropriately selected and used as necessary. As apparent from the embodiment shown in FIG. 1, when performing molding processing in a molding factory or the like,
The runner, sprue, etc. generated by the operation of the injection molding machine are crushed by the runner crusher.
First, the hopper (H) shown in FIG. 1 (in FIG. 1,
If the appropriate amount is input from the opening (shown by the chain double-dashed line), it is supplied from the hopper (H) through the chute (S) to the hot screw press (P) provided directly below the chute (S). Will be done. The runner crushed pieces supplied to the hot screw press (P) were immediately
By the propulsive force based on the rotation of the screw spindles (S / S) of the hot screw press (P), the kneaded strands (J) are finally kneaded, and finally kneaded strands (J) are continuously fed. Thus, the kneaded strand (J)
Can be desired by passing through a nozzle (N) (a pellet having a desired diameter in advance, which will be repeatedly described) that is mounted so as to face the tip of the hot screw press (P). A strand having a diameter is formed, and the kneaded strand (J) from the nozzle (N) is further introduced into the guide groove (G). Therefore, the kneaded strand (J) introduced into the guide groove (G) is hung down immediately below the guide groove (G) due to the action of gravity. Here, the kneaded strand (J) is introduced into the introduction hole (Q ') of the cylindrical push mechanical element (Q) which is installed at the hanging tip portion of the kneaded strand (J). Thus, the push mechanical element (Q)
The kneaded strand (J) introduced into the introduction hole (Q ′) of the cooling air blow zone (Q ″) formed in a proper position in the introduction hole (Q ′) has a cooling air blowing action. Therefore, from a thermodynamic point of view, it is most efficiently cooled and solidified in a very short time, and further, the push mechanical element (Q) is used.
Kneading as a result of being pushed by the dynamic pressure of the cooling air that is blown strongly from the introduction hole (Q ') and the cooling air blow zone (Q ") that are punched in It has a so-called double effect in that it enables smooth delivery of the shaped strand (J), where the kneaded strand (cooled and solidified to an appropriate hardness) J) is a synthetic resin raw material for injection molding, which is sequentially cut by a rotary cutter (C) provided at a position directly below and cut to an appropriate length and molded with a recycled material such as a runner or sprue. As pellets,
It is said to be reborn and reused with other virgin raw materials. Incidentally, the cooling air (F) for blowing the cooling air is fixed at a proper place in the space inside the metal casing (B) as described above, for example, where compressed air (A) or the like is used, The cooling air (F), which is obtained by the air cooling unit (E) and is sent out by the air cooling unit (E),
Not only the mechanical element (Q) but also the pre-cooling action in the guide groove (G) (→ mark, ↑ mark, ↓ mark, etc. in FIG. 1 and FIG. Needless to say, it can be configured so as to fulfill (as shown).

[0007]

As described above, according to the apparatus of the present invention, the following practical effects can be obtained. That is,
First of all, speaking of the maximum effect of the present invention, as a result,
In any field of general synthetic resin molding factories and synthetic resin precision molding processing factories, the improvement of the quality of synthetic resin molded products is so great that it has never been thought about. It is said that. Furthermore, the following is a more specific and detailed list of these maximum effects. . It is expected that the quality characteristics of synthetic resin molded products will be significantly improved. In particular, it can be expected that the physical properties of a synthetic resin molded product will be improved. . At the stage of the synthetic resin molding process, the worry of contamination such as mixing problem of different color raw materials at the time of color change can be completely cleared. . Despite the above items, the basic structure of the invention is extremely simple. . Therefore, the entire device is light, thin, short, and small to save space,
Therefore, the price is cheap and cheap. . Therefore, even if it is installed or installed around the molding machine currently in operation, it is extremely easy. . By being able to lay out around the synthetic resin molding machine,
Space saving can be achieved in a synthetic resin molding factory, and at the same time, tidying up, tidying up, cleaning, etc. (that is, 3S in the field) can be achieved, resulting in improved productivity. Can be achieved. . From the section, it is possible to fulfill the responsibility for promotion of rationalization based on the practice of recycling and preservation of factory environment. As described above, the "cooling air blow type push mechanism for pellet molding machine" according to the present invention according to the items 1 to 3.
Is reasonably and economically, its practical effect is enormous, and we are confident that there is no doubt that it can make a great contribution to this kind of molding industry anymore. Is.

[Brief description of drawings]

One embodiment according to the present invention is shown in FIGS. still,
FIG. 1 is a sectional front view of a partially omitted partially cutaway essential part of the present invention “cooling air blow type push mechanism for pellet molding machine”, and in FIG.
Particularly regarding the flow of the strand (J), the nozzle (N)-
Each of the guide grooves (G) -push mechanical element (Q) is an enlarged cross-sectional view of a part of the main part omitted, and (H) in the drawing is a hopper, which is indicated by a chain double-dashed line. In addition, in the symbols in the figure, (L), (L)
Is a sprocket wheel for chain conduction system, (T)
Is a conduction chain, (W) and (W) are transfer casters, (A) is compressed air, (F) is cooling air, (M) is a driving electric motor, and (E) is air. Each cooling unit is shown.

[Explanation of symbols]

 A Compressed Air B Metal Enclosure C Rotary Cutter E Air Cooling Unit F Cooling Air G Groove for Guide H Hopper J Kneaded Strand L, L Sprocket Wheel M Motor for Driving N Nozzle P Hot Screw Press Q Push Mechanical Unit Q'Introduction hole Q "Cooling air blow zone S Chute S / S Screw spindle T Transmission chain W, W Transfer caster

Claims (1)

[Claims] 1. A driving electric motor (M) is provided at a proper position in the metal casing (B), and a hot screw press (P) is provided at an upper portion of the metal casing (B). According to the winding conduction system, the hot screw press (P) is arranged and fixed so that the hot screw press (P) can be driven freely, and the nozzle of the sizing desired in advance at the tip of the hot screw press (P) ( N), the kneaded strand (J) continuously fed from the nozzle (N) is introduced and hung down into the guide groove (G) provided opposite thereto. In the pellet molding apparatus configured so as to pass through the cylindrical push mechanical element (Q) installed immediately below it, in the process of passing through the cylindrical push mechanical element (Q) described above. Cooling air blow A pellet molding apparatus characterized in that the kneaded strand (J) is cooled and solidified to a desired hardness by the action, and the kneaded strand (J) can be smoothly fed out. Cooling air blow type push mechanism.