KR100963182B1 - Device recycling waste-plastics, and products manufactured by the same - Google Patents

Abstract

The waste synthetic resin recycling apparatus according to the present invention comprises an extrusion part, a molding part, and a cooling part, and also includes a lubricating oil supply part and a buffering mechanism, and melts the waste vinyl, waste synthetic resin, etc., which are stained with soil and foreign substances, without washing them. Since it is configured to be regenerated, it is possible to produce waste synthetic resin molded articles in which a large amount of foreign substances exist in the middle part of the molded article and almost no foreign substances exist in the outer skin part by only one molding process, without undergoing a separate coating process. Through the configuration of the supply unit and the buffer mechanism, the waste synthetic resin molded article can be molded and discharged smoothly without clogging, thereby improving the formability of the product as well as the productivity.

Waste Vinyl, Waste Synthetic Resin, Washing, Extrusion, Forming, Insulation, Cooling, Buffering, Lubricant

Description

Device recycling waste-plastics, and products manufactured by the same

The present invention relates to an apparatus and a molded article for regenerating used farm or industrial waste vinyl, waste synthetic resin, and the like, and particularly, to melt and recycle waste vinyl, waste synthetic resin, etc., which are soiled with dirt and foreign substances, without washing. It relates to a waste synthetic resin recycling apparatus and a molded article produced through the same.

According to industrial development, the amount of waste vinyl and synthetic resin generated every year is increasing rapidly, which is causing environmental pollution problem.

Such waste vinyl and waste synthetic resins prevent the early stabilization of landfill due to hard decomposability, and when incinerated, some heat energy can be used, but it causes a lot of economic loss, and also emits toxic gases such as dioxins, It is causing a problem.

Therefore, the recycling of waste vinyl and synthetic resins not only solves the environmental pollution problem in the country, but also has a significant impact on industrial development in that it is the recycling of resources in Korea, which lacks natural resources, so it is urgently required to develop recycling technology to solve this problem. In addition, the state is operating various support systems for recycling waste vinyl and waste synthetic resins.

Here, the waste vinyl recycling method which is generally used now will be briefly described, and the problems thereof will be described as follows.

When the used vinyl used in farms or factories is collected and sent to a recycling plant, the used vinyl is put into a grinder and pulverized. Afterwards, foreign matters such as soil, etc., which are buried in the pulverized waste vinyl are removed, and the foreign matters in the waste vinyl are usually removed by using a cleaning device.

Next, the washed waste vinyl is dehydrated or dried, and then put into an extrusion apparatus to be molded into a resin material to produce various recycled resin products.

However, in the conventional waste vinyl recycling method as described above, in order to remove foreign matters such as soil in the waste vinyl, a separate washing process is performed, followed by dehydration and drying operations, and then extruded and molded to wash. And it takes a lot of time to dry, such as not only the productivity is lowered, but also the cost for recycling waste vinyl is increased, there is a problem that the economy is inferior.

In addition, since the recycled synthetic resin molded article produced through the conventional waste vinyl recycling method as described above is usually manufactured by molding only a resin material in which waste vinyl is melted, there is a problem that the overall strength is lowered. In the case of adding a new rigid reinforcing material to solve such a problem, not only the manufacturing process is complicated, but also the recycling cost increases, which also causes a problem of low economic efficiency.

On the other hand, when extruded and molded as it is, the foreign material is exposed to the surface of the recycled molded product, the surface of the recycled molded product is exposed as it is, and the surface of the molded product becomes rough, which leads to a great drop in the merchandise property, and the structure of the molded product is not dense. When the crack occurs, such as easily broken, there is a problem that the strength is significantly reduced.

Of course, after molding as it is in the state in which the foreign matter, such as waste vinyl, it can be additionally coated on the outer surface of the molded article to form a smooth surface, but in this case a separate coating process is added, the problem of productivity and economic efficiency is deteriorated do.

The present invention has been made in order to solve the above problems, it is possible to easily recycle the waste resin that was not recycled by configuring to manufacture a synthetic resin molded by melting as it is without washing the foreign matter on the waste vinyl or waste synthetic resin, etc. It is an object of the present invention to provide a waste synthetic resin paper recycling apparatus and a molded article produced therefrom.

In particular, the present invention, without a separate coating process, by only one molding process, by molding so that a large amount of foreign matter is present in the middle of the molded article and there is almost no foreign matter in the outer skin portion, the outer surface is smooth and the strain rate of the product is It is an additional object to provide a waste synthetic resin recycling apparatus that can be minimized, and also to improve the strength of the molded product to increase the commerciality of the molded product.

In particular, the present invention, by forming a lubricating oil supply to facilitate the discharge of the molten resin, and when the volume is expanded during the extrusion of the molten resin, by forming a buffer mechanism that can eliminate the synthetic resin molded article without clogging It is an object of the present invention to provide a waste synthetic resin paper recycling apparatus that can be molded and discharged smoothly and a molded article produced through the same.

The waste synthetic resin recycling apparatus according to the present invention for realizing the above object, an extrusion unit for forcibly extruding a molten synthetic resin (hereinafter referred to as 'melt resin') containing foreign matter; A molding part connected to the extrusion part and discharged after being molded into a specific shape while the molten resin extruded from the extrusion part passes; A cooling unit configured to quench the molten resin extruded into the molding unit while passing through the molding unit; And a lubricating oil supply unit for supplying lubricating oil so that the molten resin molded product can be easily discharged into the molded part, and when the synthetic resin molded product is molded while the molten resin is cured in the molded part, By this, the synthetic resin molded article is molded into a three-layer structure in which a skin portion is formed at both the center portion and the center portion, wherein the molten resin having a relatively large amount of foreign matter content is cured at the center portion compared to the foreign matter content amount of the outer skin portion, and the outer skin portion is hardened. It is characterized in that it is configured to be cured while continuously infiltrating the molten resin having a relatively small foreign matter inclusion amount compared to the foreign matter inclusion amount of the center.

Here, the lubricating oil supply unit is preferably configured such that the lubricating oil can be supplied to the outer surface of the molded article at a position which is hardened by a predetermined or more while the molten resin passes through the molding unit.

The waste synthetic resin recycling apparatus may include an immersion tank in which a cooling fluid is stored so as to cool the molding part in an immersion method, wherein the lubricating oil supply part may be supplied with a natural inflow method of the cooling fluid stored in the immersion tank. It is preferable to be configured to.

Alternatively, the lubricating oil supply unit may be configured to forcibly supply lubricating oil into the molding unit.

On the other hand, the molding unit may be provided with a buffer mechanism to open the mold to a certain extent when the volume is expanded in the process of the molten resin is extrusion molded.

In addition, the waste synthetic resin recycling apparatus according to the present invention for realizing the above object, the extrusion unit for forcibly extruding the molten synthetic resin (hereinafter referred to as "melt resin") containing foreign matter; A molding part connected to the extrusion part and discharged after being molded into a specific shape while the molten resin extruded from the extrusion part passes; A buffer mechanism provided in the molding part to open the mold to a certain extent when the volume is expanded in the process of extruding the molten resin; A cooling unit configured to quench the molten resin extruded into the molding unit while passing through the molding unit, and when the molten resin is cured in the molding unit, the synthetic resin molded article is molded, the action of the extrusion unit and the cooling unit By the molding, the synthetic resin molded article is molded into a three-layer structure in which a skin portion is formed at both the center portion and the center portion, wherein the molten resin having a relatively large amount of foreign matter content is cured at the center portion relative to the foreign matter content amount of the skin portion. The skin is characterized in that it is configured to be cured while continuously infiltrating the molten resin having a relatively small amount of foreign matters compared to the foreign matter content of the central portion.

Here, the molding part is made of a mold divided into a plurality of parts, and the shock absorbing mechanism is connected to interconnect the plurality of molds, and the elastic member is supported by the connecting member to provide elastic force in a direction in which the plurality of molds are in close contact with each other. It is preferable to comprise an elastic member.

The connection member is composed of a bolt and nut fastened through the mold, the elastic member is preferably installed between at least one of the bolt or nut and the mold.

In addition, the molding portion, the direction in which the synthetic resin molded article is discharged, the support plate for supporting the outer mold of the mold is installed in the front part of the mold, wherein the buffer mechanism is installed in the rear portion of the mold, the support plate is not installed desirable.

The molded article molded using the waste synthetic resins according to the present invention for realizing the above object is molded by the waste synthetic resin recycling apparatus described above, and has a three-layer structure in which an outer shell portion is integrally formed at both the center portion and the center portion thereof. It is made of, the central portion is relatively foreign material is present in comparison with the outer skin portion, the outer skin portion is characterized in that it is composed of a structure that is relatively less foreign matter than the central portion.

The waste synthetic resin recycling apparatus according to the present invention and the effect of the molded article produced through the same will be described.

The waste synthetic resin recycling apparatus according to the present invention can be easily recycled to recycle waste synthetic resins that could not be recycled because the synthetic resin molded product can be manufactured by melting them as they are without washing the foreign substances on the waste vinyl or waste synthetic resin. There is an advantage to that.

For this reason, since the waste vinyl is melted and recycled as it is without washing, the regeneration process is simplified, and the economical efficiency of the recycled product is improved.

In particular, the present invention is smooth in the outer surface because it can be molded so that a large amount of foreign matter is present in the middle of the molded article and almost no foreign matter is present in the outer skin part by only one extrusion molding process without undergoing a separate coating process. Not only can the molded article be molded easily through a single molding process, but also the compressive strength of the product can be improved, thereby increasing the merchandise of the molded product.

That is, in the present invention, when the molten synthetic resin containing foreign matter is molded, the foreign matter such as soil is concentrated at the center side and cured, and the pure molten resin containing almost no foreign matter is continuously extruded and supplied to the portion forming the outer skin portion. Since it is hardened while being hardened, it is possible to produce high strength synthetic resin molded parts such as a smooth outer surface and a reinforcing agent introduced into the inner surface through a single molding process, which has the effect of producing recycled synthetic resin molded products having high merchandise and economy. will be.

In addition, the present invention is a high-strength having a low strain rate that the deformation and expansion, such as shrinkage and expansion hardly occurs after molding the product because the molded product is molded while being repeatedly cooled by the reciprocating motion of the extrusion piston while stepped down cooling while passing through the molded part. There is also an advantage that a molded article can be produced.

The molded article produced by the present invention has the advantage that the appearance of the product is beautiful and the overall rigidity is improved, and in particular, the structure is densely molded by the forced compression quenching method and thus the excellent quality of hardly deformation occurs.

In particular, the waste synthetic resin recycling apparatus according to the present invention has a lubricating oil supply part for supplying lubricating oil into the forming part, so that the molded product can be discharged without clogging, and the lubricating oil can be cooled and cured quickly by melting the melted resin. The effect can also be expected, and the whole has the effect of raising the precision and productivity of a molded article.

In addition, the waste synthetic resin recycling apparatus according to the present invention, when the volume is expanded in the process of extruding the molten resin, because the mold is formed so that the molded article is discharged to a certain extent, the volume of the molded article in the product molding process In addition to solving the problem of causing a problem in the production of the molded product due to expansion, it also has the effect of improving the productivity by solving problems such as mold breakage.

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

1 to 5A and 5B, a waste synthetic resin recycling apparatus according to the present invention will be described.

1 and 2 is a view of the pre-extrusion state of the waste synthetic resin paper recycling apparatus according to an embodiment of the present invention, Figure 1 is a side cross-sectional view of the regeneration device, Figure 2 is a plan view of the regeneration device.

3 and 4 are views of the extrusion operation state of the waste synthetic resin paper recycling apparatus according to an embodiment of the present invention, Figure 3 is a side cross-sectional view of the regeneration device, Figure 4 is a plan view of the regeneration device.

5A and 5B are cross-sectional views of the A-A portion of FIG. 1, illustrating the structure of the lubricating oil supply unit and the shock absorbing mechanism, which are the main components of the present invention.

Waste synthetic resin paper recycling apparatus according to an embodiment of the present invention, the extrusion unit 10, the molding unit 30, the lubricating oil supply unit 34, the cooling unit 50, the immersion tank 60, on the base 1, Since the heat insulation part 70, the shock absorbing mechanism 80, etc. are comprised, each structure is demonstrated in detail.

The base 1 is a part for supporting the waste synthetic resin recycling apparatus according to the present invention. The base 1 has a conventional pedestal structure, and accommodates various equipment necessary for the recycling apparatus of the present invention, for example, a mold cooling apparatus. It can be configured to do so.

The extruder 10 is a portion configured to forcibly extrude the molten synthetic resin containing foreign matter introduced from the outside toward the molding unit 10.

Herein, the melt-synthetic resin containing the foreign substances injected into the extruder 10 is a resin obtained by melting farmhouse waste vinyl or industrial waste vinyl, which is melted through a waste vinyl heating melting apparatus in a state in which most foreign matters remain intact. Resin.

In this embodiment, the waste vinyl is mainly described as a raw material of the molten synthetic resin containing foreign substances, but is not necessarily limited thereto, and a general plastic synthetic resin material may be included as long as it is a material capable of forming the molten synthetic resin.

The waste vinyl or waste synthetic resin is melted, and the waste vinyl or waste synthetic resin is crushed to a predetermined size, and then put into a heating melting apparatus, and then changed into a molten state that can be manufactured into a new molded article. The method of supplying the part 10 is preferable. At this time, it is also possible to use the waste vinyl or waste synthetic resin by heating and melting as it is collected without necessarily grinding to a predetermined size.

The configuration of the extrusion unit 10 into which the molten synthetic resin (hereinafter also referred to as 'melt resin') containing such foreign matter will be described in detail.

The extruded part 10 is composed of an extrusion cylinder assembly 11 and a resin storage device 21. First, the extrusion cylinder assembly 11 has an inlet 12a formed at one side (upper side in the drawing), and the other side ( Extrusion opening 12b is formed in the right side of the drawing, and is configured to extrude the molten resin introduced into the molding unit 30 through the resin storage device 21.

The extrusion cylinder assembly 11 is formed in the left and right long as shown in the extrusion cylinder 12 and the space formed to be extruded after the resin is filled therein, and inserted into the extrusion cylinder 12 linear reciprocating It consists of an extrusion piston 14 which allows the extrusion operation to be made while moving, and a first hydraulic cylinder device 16 which reciprocates the extrusion piston 14 at the rear of the extrusion piston 14.

 The inlet 12a and the outlet 12b are formed in the extrusion cylinder 12. The inlet 12a is formed at the upper center portion, and the extrusion port 12b is formed at the front side.

In addition, the extrusion opening 12b side of the extrusion cylinder 12 is provided with an opening and closing portion 18 for decompression, the opening and closing portion 18 is closed when the extrusion cylinder assembly 11 operates to extrude the resin It is a part configured to enable the extrusion operation toward the molding portion 30 and, on the contrary, to open the extrusion piston 14 smoothly while opening when the molten resin is filled into the extrusion cylinder 12. In general, it is preferable that it is configured as a check valve structure that opens and closes according to pressure changes.

That is, the opening and closing portion 18 is formed in the opening and closing housing 18a which is formed to penetrate the extrusion cylinder 12 through which a hole through which air can pass, and inserted into the opening and closing housing 18a. It is comprised by the opening-closing pin 81b which opens and closes and moves up and down according to the pressure change in the extrusion cylinder 12 in a state.

Such a structure of the opening / closing part 18 can be variously modified according to the implementation conditions, and can be configured to be opened and closed by an electronic control method by external control, if necessary. In addition, the opening and closing part 18 can be deleted and comprised.

In addition, the extrusion port 12b side of the extrusion cylinder 12 is provided with a support plate 19 for supporting so as to prevent the extrusion cylinder from opening during molten resin extrusion. The support plate 19 is formed in a rectangular plate structure so as to support the cylinder on the outside of the extrusion cylinder, it is preferable to configure a plurality of plates arranged at regular intervals.

In particular, the extrusion cylinder 12 is configured with a heater unit 40, which prevents the molten resin filled into the extrusion unit 10 from curing, and in a state where the molten state is maintained as it is. As a component to be extruded into the molding unit 30, it is preferable that the molten resin is filled before being extruded and discharged into the molding unit, that is, before the portion where the heat insulation unit 70 is located.

The heater unit 40 may be configured to provide heat while the heating fluid flows, but it is preferable to use an electric heater that is easy to control the temperature.

The extrusion piston 14 is inserted to the rear of the extrusion cylinder 12 is configured to enable reciprocating movement, the front surface 14a is preferably formed in a concave shape in order to increase the effect of the extrusion operation as shown in FIG. In addition, the intermediate portion is preferably provided with a groove portion 14b which prevents the molten resin from leaking or removes the molten resin remaining on the inner surface of the extrusion cylinder 12 during the piston movement.

The first hydraulic cylinder device 16 is connected to the extrusion piston 14 in a state supported by the connecting support 17 at the rear of the extrusion cylinder 12 so as to reciprocate the extrusion piston 14. It is composed.

Here, the first hydraulic cylinder device 16 is preferably configured to be operated by hydraulic pressure or pneumatic pressure, but may be configured using a linear operating mechanism including a linear motor, if necessary.

Now, the resin reservoir 21 mounted on the top of the extrusion cylinder assembly 11 will be described.

The resin storage device 21 may be continuously connected to the inlet 12a of the extrusion cylinder assembly 11 in a substantially vertical direction to continuously supply molten resin to the extrusion cylinder assembly 11 while storing a predetermined amount of the melted resin. It is configured to be.

Such a resin storage device 21 includes a storage cylinder 22, a pressure piston 24 provided in the storage cylinder 22 and vertically moved, and a second hydraulic cylinder device 26.

The reservoir 22 is connected to the upper portion of the inlet 12a of the extrusion cylinder 12 in a substantially vertical direction, and is provided with a molten resin injector 28 on one side (the rear side in the drawing) and has a predetermined amount of molten resin therein. It is made to store temporarily.

The pressure piston 24 is inserted inward from the upper portion of the reservoir 22 to change the internal volume of the reservoir 22 by the second hydraulic cylinder device 26 so that the molten resin is the extrusion cylinder 12. It is configured to pressurize to be injected into the interior.

The second hydraulic cylinder device 26 is configured to operate the pressurized piston 24 in a state of being supported by the connecting support 27 to the reservoir 22. Of course, the 2nd hydraulic cylinder apparatus 26 can also be comprised using a linear actuation mechanism like the 1st hydraulic cylinder apparatus 16 mentioned above.

Such a resin storage device 21, when filling the molten resin into the extrusion cylinder 12, as shown in Figure 1 operates to lower the pressure piston 24, as shown in Figure 3 the extrusion cylinder ( When 12) is extruding the molten resin, the molten resin cannot be supplied into the extrusion cylinder 12, so that the molten resin is gradually stored in accordance with the amount of molten resin injected through the injection portion 28 on the side to store the molten resin. do.

Next, the molded part 30 to which a molded product is made while the molten resin extruded from the extruded part 10 will be described.

The molding part 30 is a component part which is connected to the extrusion hole 12b of the extrusion part 10 as described above and is cured after being molded into a specific shape while the molten resin extruded therein is introduced.

As shown in FIG. 5A, the molding part 30 may be divided into an upper mold 31, an intermediate mold 32, and a lower mold 33. Such molds 31, 32, and 33 may be configured. It is preferable that the molding space is formed to be long in the extrusion direction of the resin.

Of course, in the drawings of the present embodiment, the configuration of the mold divided into three parts 30 is illustrated, but depending on the implementation conditions, divided into two or assembled into three or more molds divided into three or more assembled It is also possible.

In addition, the outer side of the molding unit 30 is provided with a support plate 35 for supporting the outside of the mold (31) (32) (33). The supporting plate 35 is arranged at regular intervals orthogonal to the length direction of the mold, and prevents the molds 31, 32, 33 from spreading in the process of extruding and ejecting the molded article, and molding It is responsible for the cooling fin function to enlarge the heat dissipation area of the part.

The support plate 35 has a rectangular plate-like structure as a whole, and a mold insertion hole 35a (see FIG. 5A) is formed to allow the mold to be inserted into the center portion thereof, and each support plate 35 positioned at an outer side of the mold. ) Are preferably installed to be fixed to each other by the fixing bar (36).

In the drawing of the present embodiment, the support plate 35 is illustrated in the front portion of the molding section 30, but depending on the implementation conditions, it is possible to install over the entire area of the molding section 30.

The molding unit 30 is configured with a lubricating oil supply unit 34 and a shock absorbing mechanism 80, which will be mainly described with reference to FIGS. 5A and 5B.

The lubricating oil supply part 34 is a constituent part for supplying lubricating oil into the molding part 30 so that the molten resin molded product P can be easily discharged. Can be configured in various ways.

In the drawing of this embodiment illustrates a configuration in which three lubrication holes are formed in the upper mold 31 and the lower mold 33, respectively. The configuration of the lubrication hole is formed so that the cooling fluid stored in the immersion tank 60 can be supplied in a natural inflow manner. In this case, it is preferable to use a fluid that can simultaneously realize a cooling action and a lubricating action.

The position, number, shape, and the like of the lubrication holes constituting the lubricating oil supply part 34 may be formed in various ways, but preferably, the upper and lower molds 31 and 33 may be uniformly supplied to the front surface of the molded product. It is good to be configured uniformly every interval. Of course, it is also possible to form a lubrication hole in the intermediate mold 32.

The lubricating oil supplied through the lubricating oil supply part 34 is configured to be supplied to the surface of the resin to be molded in the mold. That is, since the molten resin is press-fitted from the extruded portion 10, the pressure is quite high, and the molten resin is hardened before hardening, the molten resin leaks out when the lubrication hole is formed therein. Problems may arise. Therefore, the lubricating hole constituting the lubricating oil supply part 34 is configured at a position where the molten resin can supply the lubricating oil to the outer surface of the molded product in a state of hardening more than a predetermined while passing through the molding part. In this case, since the molten resin is hardened to some extent, even if pressure is applied from the extrusion part 10, the lubricating oil can be smoothly supplied to the molded article without the molten resin leaking out of the mold through the lubrication hole.

On the other hand, the natural lubricating oil supply method has been described above, but depending on the implementation conditions may be configured as a forced supply method.

The lubricating oil forced supplying system may be configured to compose a pump device or the like capable of forcibly feeding the lubricating oil into or out of the lubricating hole as described above, and may be configured to forcibly supply the lubricating oil into the molding part 30. Since the forced oil supply system can adopt and use various well-known lubricating oil supply methods, detailed description is omitted.

Next, the shock absorbing mechanism 80 is configured to smoothly discharge the molded article while opening the mold to some extent when the volume of the molded article expands in the process of the extrusion of the molten resin into the molding unit 30.

The shock absorbing mechanism 80 is preferably configured on the outlet side of the molding part 30, which is the most pressured (ie, close to the extrusion part from the molding part) when the molten resin is extruded and molded. Is configured on the rear side, when the molded article is expanded in the molding process is discharged, as shown in Figure 5b to allow the mold to open a predetermined interval (C), so that the volume-expanded molded article can be smoothly discharged It is a component part.

It is preferable that a plurality of such shock absorbing mechanisms 80 are formed in at least two places on the rear portion of the molding part 30. Of course, it is also possible to configure in the front portion of the molding portion 30, but at this time, it is necessary to configure so that the molten resin is not discharged between the molds because the molten resin is before curing. Therefore, preferably, the front part of the molding part 30 is configured to maintain a state in which the mold is completely in contact with the fastening means, the support plate 35, and the like so that the mold does not open, and the molding part 30 It is preferable to install the shock absorbing mechanism 80 to the rear portion of the mold to open a certain degree.

Referring now to the specific configuration of the shock absorbing mechanism 80, as shown in Figures 5a and 5b, connecting members 81 and 82 for interconnecting the molds through both sides of the mold, and the connecting members 81, 82 is made of an elastic member 83 that provides a compressive elastic force so that the plurality of divided molds can be in close contact with each other.

Here, the connecting member is a bolt 81 which sequentially passes through the upper mold 31, the intermediate mold 32, the lower mold 33 on both sides of the mold, and a nut fastened to the bolt 81 at the bottom of the mold. 82.

In addition, the elastic member 83 is positioned between the head of the bolt 81 and the upper mold 31 to provide an elastic force so that the mold does not open. It is preferable that the elastic member 83 serving this role uses a high-strength spring having considerable elastic strength so that the mold does not easily open.

In the mold, the bolts 81 and the nuts 82, the holes 30b and the grooves 31a and 33a in which the elastic members 83 are positioned may be formed. That is, a through hole 30b penetrating through the upper mold 31, the intermediate mold 32, and the lower mold 33 is formed, and the bolt 81 and the elastic member 83 are inserted into the upper mold 31. The groove 31a to be mounted and the lower mold 33 may be provided with a groove 33a to which the nut 82 is inserted and mounted. The grooves 31a and 33a may be omitted as necessary, and the bolts 81, the nuts 82, the elastic members 83, and the like may be disposed so as to be exposed to the outside of the mold.

Meanwhile, a stopper may be installed at or near the portion where the shock absorbing mechanism 80 is installed to prevent the mold from being opened for a predetermined time or more.

The stopper may be configured to adjust the length of the fastening (fixing) of the bolt 81 and the nut 82 so as not to open any more. In addition, in the figure of this embodiment, it can also be comprised through the support plate 35 surrounding the metal mold | die. At this time, the support plate 35 is also configured in the rear portion of the mold, which is the side on which the shock absorbing mechanism 80 is installed, or conversely, when the shock absorbing mechanism 80 is formed in the front portion of the mold. Referring to FIG. 5A, the stopper using the support plate 35 has a small spacing S between the upper mold 31 and the inner surface of the support plate 35. If the gap (S) is opened, it is configured so that it is no longer opened by the support plate 35.

The molded article manufactured through the molding part 30 will be described below with reference to FIGS. 6A to 18, and the cooling part 50 and the heat insulating part 70 will be described below.

First, the cooling unit 50 is configured to pass through the inside of the molds 31 and 33 forming the molding unit 30 so as to quench the molten resin extruded from the extrusion unit 10 and supplied into the inside. It is composed.

At this time, the cooling unit 50 is configured to supply a cooling fluid such that the temperature for cooling the molten resin gradually decreases in a step in which the molten resin is discharged, as shown in FIGS. 2 and 4. The cooling flow path 55 constituting the 50 is configured such that the cooling water injection port 51 is located at the discharge port 34 side of the molded product, and the cooling water discharge port 53 is located at the side close to the heater unit 40.

In addition, the cooling passage 55 may be configured to cool the fluid while flowing in a zigzag or spiral manner to the mold forming the molding part 30, and the molding part 30 may be configured to cool the upper mold 31. When the upper mold 31 and the lower mold 33, the upper mold 31 and the lower mold 33 is preferably configured to perform a cooling action through a separately configured cooling flow path 55.

In addition, it is preferable to use a fluid capable of cooling to 10 ° C. or less as the fluid passing through the cooling passage 55. Coolant made of ordinary water may be used, and a refrigerant used in a refrigeration cycle may be used if necessary. It is also possible. At this time, a refrigeration cycle device, for example, a compressor, an expansion valve, an evaporator, a condenser may be provided in the base (1).

The cooling unit 50 is a resin containing most of the foreign matter relative to the central portion (P1) of the synthetic resin molded product (P) when the molten resin is discharged into the molding unit 30 by the extrusion unit 10 The ash is cured, and the outer skin portion P2 of the synthetic resin molded article is an important component of the present invention, which acts to allow the resin material, which contains relatively little foreign matter, to be continuously penetrated and cured.

As a result, when the molten resin is molded in the molding unit 30 by the cooling unit 50 and the extrusion unit 10, the regeneration apparatus of the present invention hardens while concentrating foreign substances such as soil on the central portion P1. In addition, the part forming the outer skin part P2 is hardened by continuously supplying a pure molten resin that contains almost no foreign matter, so that the outer surface is smooth and a synthetic resin molded article P such as a reinforcing agent is introduced by the foreign material on the inner surface. It is configured to produce.

The formation principle of the synthetic resin molded article P according to the present invention will be described in detail below and will be omitted here.

Next, an auxiliary cooling device is provided at the outer region of the cooling unit 50, that is, the outer side of the molding unit 30 to assist the cooling operation.

Auxiliary cooling device is a component to further cool the outside of the mold so that the cooling operation of the cooling unit 50 is made smoothly, in this embodiment illustrates the submerged cooling structure using the submerged tank (60).

The submersion tank 60 is preferably formed to a size sufficient to discharge the molded article in the state in which the molding part 30 is submerged in the cooling water.

The cooling fluid stored in the submersion tank 60 is completely submerged to the upper end of the support plate 35 disposed outside the molds 31, 32, 33, or the upper part of the support plate 35 including the mold. Only submerged can be stored.

Here, the molding unit 30, as described above, the lubricating oil supply unit 34 is configured, so that the cooling water (cooling fluid) filled in the immersion tank 60 is lubricated while naturally flowing into the lubricating oil supply unit (34). It is preferable to construct.

Next, the heat insulating part 70 is provided at a connection portion between the extruded part 10 and the molding part 30 to block high heat from the extruded part 10 toward the molding part 30. In the apparatus of the present invention, the heater unit 40 for heating the molten resin is positioned at the extrusion part 10, and the cooling part 50 is positioned at the molding part 30. It is configured to be.

The heat insulating part 70 is formed in a plate structure having a predetermined thickness, and is disposed between the extrusion cylinder 12 constituting the extrusion part 10 and the molds 31 and 33 constituting the molding part 30. It is preferable to be installed, and as a material, it is generally possible to block heat transfer, and any material that can withstand high temperature and high pressure may be used by appropriately adopting a known plate heat insulating material.

The waste synthetic resin recycling method of the present invention using the waste synthetic resin recycling apparatus according to the present invention configured as described above will be described with reference to FIGS. 1 to 4.

The waste synthetic resin recycling method according to the present invention is a method for producing a synthetic resin molded article by melting the household waste vinyl, industrial waste vinyl, waste synthetic resin, and the like as it is, without being washed with foreign matter.

At this time, the synthetic resin molded article P is produced, as described above, the outer skin portion P2 is smoothly formed by applying pure resin having almost no foreign matter, but the central portion P1 is molded to have a structure in which foreign matter and resin material are mixed.

The waste synthetic resin recycling method using such waste vinyl will be described in detail.

First, the waste vinyl or waste synthetic resin material is melted as it is with foreign matter.

Farm waste vinyl and industrial waste vinyl usually contain a lot of soil or foreign matter. The waste vinyl in this state is put into a heating melting apparatus without melting beforehand and melted. At this time, the heating melting apparatus needs to melt while stirring to distribute the molten resin and foreign matter evenly distributed.

In addition, although the waste vinyl or waste synthetic resin material can be melted as it is, it is also possible to grind or cut to an appropriate size if necessary.

In addition, when a large amount of foreign matter on the waste vinyl or waste synthetic resin material is more than necessary, it is also possible to add a degree of dusting without washing separately.

Next, the molten resin (hereinafter referred to as 'melt resin') containing the foreign matter melted through the above process is injected into the extruded part 10.

That is, the injection pump 28 is injected into the resin storage device 21 through the injection unit 28 of FIG. 1. In this case, the molten resin may be injected into the extrusion cylinder 12 immediately when the molten resin is filled into the extrusion cylinder 12 as shown in FIG. 1, and when the extrusion operation is performed in the extrusion cylinder 12 as shown in FIG. 3. The molten resin flows into the storage device 21 and is temporarily stored.

Here, the resin supply pressure injected from the heating melting device toward the resin storage device 21 is higher than the pressure supplying molten resin into the extrusion cylinder 12 from the second hydraulic cylinder device 26 of the resin storage device 21. It is preferable to set such that the molten resin is continuously supplied without backflow in the process of filling the extrusion cylinder 12 with the molten resin.

As shown in FIG. 1, the molten resin is filled in the extrusion cylinder while the extrusion piston 14 is backward. In the state in which the molten resin is stored in the reservoir 22 of the resin storage device 21 as shown in FIG. 3, FIG. As the pressure piston 24 is lowered as in the molten resin is injected into the extrusion cylinder 12 is filled. At the same time, since the molten resin is continuously supplied through the injection unit 28, the molten resin supplied at this time is directly introduced into the extrusion cylinder 12 and filled.

On the other hand, since the extrusion part 12 is configured with the heater part 40, the molten resin is continuously present in the molten state even after the molten resin is filled in the above manner.

Next, the molten resin injected into the extruded part 10 is pressed and extruded, and the molded part P is molded so that the pure resin gradually forms the outer skin part P2 by rapidly cooling stepwise in the molding part 30. .

As shown in FIG. 3, the extrusion piston 14 is forcibly repeated in the form of squeezing the molten resin filled in the extrusion cylinder 12 toward the forming part 30 through the extrusion hole 12b while advancing the extrusion piston 14. Extrude.

The molten resin introduced into the molding unit 30 is quenched to a low temperature step by step by the cooling unit 50, wherein the step cooling temperature is 200 ℃-180 ℃-160 ℃-150 ℃-120 ℃-100 ℃ -80 ° C-70 ° C-65 ° C-60 ° C-55 ° C-50 ° C-50 ° C-35 ° C-30 ° C-25 ° C-20 ° C-15 ° C-10 ° C. Of course, the step-down cooling temperature can be changed and set according to the molding conditions.

Thus, when the molten resin is extruded into the molding portion 30, most foreign matters are collected in the central portion (P1), and the pure resin having almost no foreign matters forms the outer skin portion (P2), the reason for this will be described.

The molten resin injected by the extrusion method into the shaping | molding part 30 from the extrusion part 10 is quenched step by step by the said cooling part 50. FIG. Therefore, the resin at the outlet 34 of the molding part 30 is pushed toward the outlet 30a in a state of being almost cured by a low temperature of about 25 ° C. to about 10 ° C. or lower. At the same time, the molten resin is gradually contracted while the molten resin is cooled in the molding part 30, and a certain gap is formed between the inner surfaces of the molds 31 and 33 forming the molding part 30 and the resin material gradually contracting. The part 30 is moved while pushing outward.

In such a state, when the molten resin is further repeatedly extruded in the extruded part 10, between the molds 31 and 33 of the molding part 30 and the contracted resin material (which forms a central part P1). As the gap between the new melt resin penetrates and fills the gap, most of the foreign matter is filtered out by the narrow gap and the pure molten resin that contains little foreign matter penetrates continuously and is continuously injected, and outside the molding part 30. It is hardened by the cooling part 50 while moving to form an outer skin part P2.

In addition, the pure molten resin forming the outer skin P2 of the molded product P is continuously pressurized by the pressure of the extruded part 10 and supplied to the central part P1 by step-down cooling. Since it is similar or slightly delayed cooling, it is formed to have sufficient rigidity by cooling to the whole integral structure.

As a result, the synthetic resin molded article P according to the present invention, which is formed through the above-mentioned forced extrusion molding and quenching molding process, is composed of a resin material containing foreign substances inside, that is, the center portion P1, and that is, the outer skin portion ( Since P2) is covered with a pure resin as a coating, the outer surface is smooth, but the synthetic resin containing foreign substances therein forms a central portion (P1) to form a product having sufficient strength.

In addition, the synthetic resin molded article (P) according to the present invention shrinks down after forming the product because it is molded while being repeatedly cooled by the reciprocating motion of the extrusion piston 14 of the extrusion unit 10 while being cooled down step by step while passing through the molding unit 30 And it becomes possible to manufacture a high-strength molded article having a low strain rate hardly occurs expansion.

As the heat insulating part 70 is configured in the waste synthetic resin recycling apparatus of the present invention, heat is transferred from the extrusion part 10 toward the molding part 30, thereby rapidly curing the molten resin from the inlet of the molding part 10. In addition to this, by allowing the pure resin to be smoothly coated on the cured resin to improve the moldability of the product.

In particular, the waste synthetic resin recycling apparatus of the present invention is further provided with a lubricating oil supply unit 34, a buffer mechanism 80, etc., in the process of extrusion molding molten resin, clogged molding without being easily discharged to the outside of the molded article This problem can be solved such that the mold is broken or the mold is broken, so that a continuous and smooth production of the molded article can be obtained.

Finally, the molded product discharged from the molding unit 30 through the above process is cut to the desired length to be stored or shipped.

Molded article (P) according to the invention produced through the above process can be confirmed through a picture of the actual molded article attached.

That is, FIGS. 6A to 6C are photographs of actual dies molded using the reproducing apparatus and method according to the present invention.

Figure 6a is a product picture showing the side of the formwork, Figure 6b is an enlarged picture showing the detail "A" of Figure 6a, Figure 6c is a picture showing the outer surface of the formwork.

As shown in FIGS. 6A and 6B, when the formwork is formed using the regeneration apparatus according to the present invention, the formwork P 'is formed to have a triple structure, and the central portion P1 may contain most foreign matters. It is possible to confirm that a stratum layer exists, and both outer skin portions P2 have a pure resin layer containing almost no foreign matter.

In addition, in Figure 6c it can be seen that the surface of the formwork is formed to be quite smooth even if melted and unwashed vinyl and the like.

Next, a molded article produced using the waste vinyl recycling apparatus and method according to the present invention as described above will be described.

Molded article (P) that can be produced using the regeneration device of the present invention is a molten angle, corner or rim wood used as acid angle, reinforcement or edging used for formwork, support or prop used in construction sites, etc. And earthen boards used for hill climbing angles, soil protection or ground support. Of course, in addition to the construction site can be produced a variety of molded products.

Among them, the formwork according to the present invention produced by the reproducing apparatus and method of the present invention will be described in detail.

Figure 7 is a perspective view of the formwork produced in accordance with the present invention, Figures 8a to 8d is a view showing a conventional formwork compared to the formwork of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A form of the present invention will be described with reference to the drawings.

The formwork 100 according to the present invention includes a flat portion 101 formed as shown in FIG. 7 and a protrusion 103 protruding in a triangular structure at both ends of the flat portion 101.

At this time, the flat portion 101 and the protrusion 103 is manufactured in one piece.

That is, the formwork 100 of the present invention is produced by extruding using the waste synthetic resin recycling apparatus and method according to the present invention described above. At this time, since the formwork 100 which is a molded article is continuously discharged from the waste synthetic resin recycling apparatus of the present invention, it may be used by cutting to a suitable length.

The action and effects of the formwork 100 according to the present invention is molded and manufactured as described above.

Conventional formwork (1) is a triangular joint (also referred to as a 'membrane') (5) made of a synthetic resin material at both ends of the coated plywood 3, as shown in Figure 8a and 8b using a fixed nail (7) It is made by attaching.

Such a conventional formwork (1) has to be manufactured by separately manufacturing the coated plywood (3) and the triangular joint (5) using a fixing nail (7), the process of manufacturing the formwork (1) is complicated, work maneuver There are a lot of problems that productivity also falls.

In addition, since the triangular joint 5 is separately fixed to the coated plywood 3 as shown in FIG. 8C, a gap is generated between the coated plywood 3 and the triangular joint 5 before or during construction. When it occurs, the cement, which is a concrete material, protrudes between the gaps, and then hardens. Therefore, a complicated problem arises in that the projected portion must be polished and removed after construction.

In addition, after construction, the nail 7 for fixing the coated plywood 3 and the triangular joint 5 easily detached or used for a long time, there is a problem that needs to be rusted and replaced again.

In addition, in the process of installing the mold structure for concrete construction, as shown in Figure 8d there is also an uncomfortable problem of applying oil to the surface of the formwork (1) in order to peel off smoothly after construction.

However, the formwork 100 according to the present invention can be easily produced as a single material through a single extrusion process using the waste synthetic resin paper recycling apparatus according to the present invention, and also the length of the formwork 100 is cut as necessary. Since it can be used, the productivity of the bubble house can be greatly improved, as well as can be produced unlimitedly by diversifying the length specifications, so that the construction can be performed without a joint portion, and efficient construction work is possible.

In addition, the formwork 100 of the present invention by using the waste plastic to produce the flat portion 101 and the protrusion 103 in an integrated structure as a whole product is solid, there is no separate assembly process, manufacturing and construction can also be made easily Will be.

In addition, since the formwork 100 of the present invention is made of an integral structure, there is no gap, so that after the construction, unwanted projections are formed on the concrete construction, and thus, additional work of polishing the projections is required. Of course, it is possible to improve the appearance of the concrete structure.

In addition, since the formwork 100 of the present invention is a synthetic resin molded product containing HDPE (high-density polyethylene) as a main component even without applying an additional oil, since the original oily component of HDPE does not stick cement after construction, it smoothly peels off. Not only the appearance of the concrete structure is beautiful but also the demolition work after construction can be performed smoothly.

In particular, the formwork 100 of the present invention, despite being molded by melting in the state containing the foreign matter as described above, because the outer surface roughness is very low to form a smooth, not only beautiful appearance, forced extrusion and cooling, and As foreign materials are mixed inside as the reinforcing agent is added, the product has excellent rigidity and the lowest strain rate. This will be described in detail with reference to FIG. 9.

9 is a view for explaining the durability against deformation of the formwork 100 according to the present invention. (a) is a view showing the formwork 100 of the present invention, (b) is a side view for explaining the deformation state after formwork in the case of not a forced extrusion method.

Formwork 100 according to the present invention is formed by the forced extrusion molding and forced cooling method through the waste synthetic resin paper recycling apparatus described above, so that deformation does not occur on the surface and the edge portion.

That is, as shown in Figure 9 when the formwork 100 according to the present invention is molded through the waste synthetic resin recycling apparatus of the present invention, while being cooled in a step-down cooling method, and repeatedly forced extrusion molding, in the molding process Since the tissue is compactly formed, the problem that the volume of the corner portion or the like shrinks after molding the product hardly occurs.

On the other hand, in the case of the forced extrusion method, as shown in (b) of FIG. 9, a problem occurs that the corner portion of the formwork 100 shrinks inward. In other words, the outer surface is formed by the A line at the time of initial molding, but shrinks due to external temperature change over time, so that the strength of the form 100 is reduced and the concrete structure formed by the formwork 100 is used. The shape will not be made properly.

As a result, the formwork 100 according to the present invention is formed with a synthetic resin layer containing a foreign matter such as soil therein at the time of molding, and forms a smooth outer skin having almost no foreign matter on the outer surface, the appearance of the product is beautiful In addition, the overall rigidity is improved, and since the tissue is compactly formed by the forced compression quenching method, the deformation is hardly generated.

The construction state of the concrete structure using the formwork 100 of the present invention will be described with reference to FIGS. 10 and 11.

Figure 10 is a planar cross-sectional view showing a state of use of the formwork 100 produced in accordance with the present invention, in order to construct a concrete structure, to form the formwork 100 of the present invention on both sides in the vertical direction of the figure, plywood or The composite plate 8 is shrunk, and the outer surface of the formwork 100 and the composite plate 8 is supported with the flow-foam 9 at four slopes. After the concrete is poured into the formwork 100, and then cured, and remove the formwork 100, etc., a concrete structure (C) having an appearance as shown in Figure 11 is made.

On the other hand, Figure 12 is a view showing a state in which the concrete structure (C ') is formed using the formwork of the prior art, the conventional formwork is limited in the overall length, as shown in the joint layer and the middle of the concrete structure Since refraction occurs and protrusions are formed due to gaps at edges, grinding work must be performed to remove the formwork and to remove the joint layer and the protrusions.

However, the formwork 100 of the present invention as described above can be produced according to the size of the concrete structure by extrusion molding, so even if the length of the concrete structure does not form a joint layer in the middle, and also the corner portion Since the back gap does not occur, the protruding portion does not occur even after the formwork 100 is removed, so that no additional work is required, and the construction of the concrete structure may be neat.

Next, in addition to the formwork 100 of the present invention having the characteristics as described above by the waste synthetic resin recycling apparatus and method according to the invention it is possible to produce the molded article as follows.

FIG. 13 is a view showing an acid angle 110 used for a support or a support, and FIG. 14 is a view showing a state in which an acid angle 110 shown in FIG. 13 is used.

FIG. 15 is a view showing the inverted angle 120 used as a reinforcement or a lumber, etc. FIG. 16 is a view showing a hill climb angle 130 (also referred to as an “obi”) used as a corner or a rim. .

FIG. 17 is a view showing the earth plate 140 used for soil prevention or ground support, and FIG. 18 is a view showing the use state of the earth plate 140 shown in FIG. 17 at the time of earth wall construction.

Various molded articles according to the present invention as shown in Figures 13 to 18, can be molded from construction, civil engineering, woodworking materials, the molded article of the present invention is a continuous continuous molding integrally by forced cooling extrusion method, It can be produced without significant limitations, and the seam portion can be minimized.

In addition, the molded article of the present invention can manufacture a variety of shapes, such as triangles, squares, pentagons, etc., which are difficult to manufacture from wood or other materials, depending on the shape of the mold part of the molding part, and by forming a three-dimensional combination strength of a trust structure such as a triangle inside Since it can be configured in various ways, torsion, refraction, cutting phenomenon, etc. can be minimized as a whole, and load and tensile strength can be increased.

1 and 2 is a view of the pre-extrusion state of the waste synthetic resin paper recycling apparatus according to an embodiment of the present invention,

1 is a side cross-sectional view of a playback device;

2 is a plan view of the playback apparatus.

3 and 4 are views of the extrusion operation of the waste synthetic resin paper recycling apparatus according to an embodiment of the present invention,

3 is a side cross-sectional configuration diagram of a playback apparatus;

4 is a plan view of the playback apparatus.

5A and 5B are cross-sectional views taken along the line A-A of FIG. 1, and FIG. 5A is a view in which the mold is in close contact, and FIG. 5B is a view in which the mold is opened.

6a to 6c are photographs showing the formwork prepared using the waste-containing resin according to the present invention,

Figure 6a is a side view showing a formwork,

6B is an enlarged view of a portion “A” of FIG. 6A;

FIG. 6C is an enlarged view of the surface seen from the portion “B” of FIG. 6A.

7 is a perspective view showing a formwork manufactured using the waste synthetic resin paper recycling apparatus and method of the present invention,

8a to 8d are views showing a conventional formwork compared to the formwork of the present invention.

9 is a view for explaining the durability of the formwork according to the present invention.

10 is a plan sectional view showing a state of use of the formwork produced according to the present invention,

11 is a plan sectional view showing a concrete structure constructed by the present invention.

12 is a view showing a state in which a concrete structure is constructed using the formwork of the prior art.

13 to 18 is a view showing a molded article produced by the present invention and some use state diagram,

13 is a view showing the acid angle used for the support or support, etc.,

14 is a view showing a state in which the acid angle shown in FIG. 13 is used;

15 is a view showing the molars angle used as reinforcement or rim,

16 is a view showing a climbing angle used as a corner or a rim,

17 is a view showing the earth plate used for preventing the earth or ground support, etc.

18 is a view showing a state of use of the earth plate shown in FIG. 17 at the time of earth wall construction.

Claims (10)

An extrusion unit forcibly extruding the molten synthetic resin (hereinafter referred to as 'melt resin') containing foreign matter; A molding part connected to the extrusion part and discharged after being molded into a specific shape while the molten resin extruded from the extrusion part passes; A cooling unit configured to quench the molten resin extruded into the molding unit while passing through the molding unit; An immersion tank in which a cooling fluid is stored to further cool the molding part by immersion; A lubricating oil supply unit configured to supply lubricating oil so that the molten resin molded article may be easily discharged into the forming unit, and the cooling fluid stored in the immersion tank may be supplied in a natural inflow manner, When the molded resin molded product is molded while the molten resin is cured in the molded part, the synthetic resin molded product is molded into a three-layer structure in which the outer molded part is formed at both the central part and the central part by the action of the extrusion part and the cooling part. The molten resin having a relatively large amount of foreign matters contained in the outer skin portion is cured, and the molten resin having a relatively small amount of foreign matters contained in the outer skin portion may be cured while continuously penetrating into the outer skin portion. Waste synthetic resin paper recycling apparatus, characterized in that configured to. The method according to claim 1, And the lubricating oil supply unit is configured to supply lubricating oil to an outer surface of a molded product at a position where the molten resin passes through the molding unit and cured at a predetermined level or more. delete The method according to claim 1, And the lubricant supply unit is configured to forcibly supply lubricant to the molding unit. The method according to claim 1, The molding unit is a waste synthetic resin recycling apparatus, characterized in that the buffer mechanism for opening the mold to a certain extent when the volume is expanded in the process of the extrusion molding the molten resin. An extrusion unit forcibly extruding the molten synthetic resin (hereinafter referred to as 'melt resin') containing foreign matter; A molding part connected to the extrusion part and discharged after being molded into a specific shape while the molten resin extruded from the extrusion part passes; A buffer mechanism provided in the molding part to open the mold to a certain extent when the volume is expanded in the process of extruding the molten resin; A cooling unit configured to quench the molten resin extruded into the molding unit while passing through the molding unit; When the molded resin molded product is molded while the molten resin is cured in the molded part, the synthetic resin molded product is molded into a three-layer structure in which the outer molded part is formed at both the central part and the central part by the action of the extrusion part and the cooling part. The molten resin having a relatively large amount of foreign matters contained in the outer skin portion is cured, and the molten resin having a relatively small amount of foreign matters contained in the outer skin portion may be cured while continuously penetrating into the outer skin portion. Waste synthetic resin paper recycling apparatus, characterized in that configured to. The method according to claim 5 or 6, The molding part is made of a mold divided into a plurality of parts, The shock absorbing mechanism includes a connecting member for interconnecting the plurality of molds, and an elastic member supported by the connecting member to provide elastic force in a direction in which the plurality of molds are in close contact with each other. The method of claim 7, The connecting member is composed of a bolt and nut fastened through the mold, And said elastic member is installed between at least one of said bolt or nut and a mold. The method according to claim 5 or 6, The molded part is provided with a support plate for supporting the outer edge of the mold in the mold front portion in the direction in which the synthetic resin molded article is discharged, The buffer mechanism is a waste synthetic resin recycling apparatus, characterized in that installed in the rear portion of the mold, the support plate is not installed. Formed by the waste synthetic resin recycling apparatus of claim 1 or 6, It consists of a three-layer structure in which the outer shell portion is integrally molded at both the central portion and the central portion, wherein the central portion has a relatively large amount of foreign substances compared to the outer portion, and the outer portion has a relatively small amount of foreign substances compared to the central portion. Molded article molded using waste synthetic resin, characterized in that the structure.

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