TWI824456B - Machine for recycling plastic waste and operation method thereof - Google Patents

Abstract

The present disclosure provides a machine for recycling plastic waste and operation method thereof. The machine for recycling plastic waste includes an outer shell. The outer shell has a crushing apparatus, a heating apparatus and an imprint apparatus therein. An upper opening of the outer shell is connects with a feed port of the crushing apparatus. The heating apparatus disposes below a discharge port of the crushing apparatus. The imprint apparatus disposes over the heating apparatus. The imprint apparatus further includes a frame assembly and an imprint plate.

Description

Plastic waste recycling machine and its operation method

The present invention relates to a plastic waste recycling machine and its operation method, in particular to a plastic waste recycling machine characterized by small size and its operation method.

Small plastic waste commonly generated by convenience stores, fast food restaurants and restaurants, such as plastic straws, plastic cup lids, plastic lunch boxes, hand-cranked drink cups, etc., will first be stored in a recycling bin or a recycling bag , to be recovered by recycling operators, and processed in sequence through crushing, cleaning and melting to become reusable materials.

However, small plastic waste is usually not large in size and varies in size. This also means that when recycling operators collect these waste, it is often difficult to bundle or package items of different sizes due to the given volume of the waste itself. And the bags actually used to store these wastes can easily be cut by sharp corners such as straws or lunch boxes during the transportation process, making it impossible to complete the entire recycling process conveniently.

Therefore, a small recycling machine that can pre-dispose small plastic waste is really desired by the industry.

In order to solve at least one of the above problems, one embodiment of the present invention provides a plastic waste recycling machine, which includes a shell, and a crushing device, a heating device and an imprinting device are provided inside the shell. One of the upper openings of the shell is connected to an inlet of the crushing device; the heating device is located below one of the outlet of the crushing device; and the imprinting device is located above the heating device.

Specifically, the above-mentioned imprinting device further includes a frame group and a pressing plate, and the frame group also has a first shaft, a rotating part and a second shaft, wherein the two ends of the first shaft are respectively It is connected to the second shaft and the rotating part, and the two ends of the second shaft are connected to the housing respectively.

In some embodiments, the above-mentioned plastic waste recycling machine further includes a processor and a weight sensor, and the weight sensor is connected to the processor.

In some embodiments, at least a portion of the rotating portion is arc-shaped.

In some embodiments, when only part of the rotating portion is arc-shaped, the above-mentioned pressure plate is disposed along the tangential direction of the arc.

In some embodiments, the number of the above-mentioned pressing plates is at least two.

In some embodiments, the geometries between the pressure portion and the heating device match each other.

Another embodiment of the present invention provides an operation method for the above-mentioned plastic waste recycling machine, which includes the following steps: first, put a plastic waste into the inlet of the crushing device from the upper opening of the casing and crush it into a plastic mixture , and move the plastic mixture from the discharge port of the crushing device into the heating device; then, use the heating device to heat the aforementioned plastic mixture at a temperature; then, by sequentially operating the rotating part and the first shaft, the pressing plate can first move from one The standby position is rotated to an imprinting position, and then approaches the heating device from the imprinting position, so that the heated plastic mixture forms a plastic brick; finally, by sequentially operating the first shaft and the rotating part, the When the pressure plate returns to the standby position, the plastic bricks are pushed out of the heating device, so that the plastic bricks can be separated from the heating device and can leave the plastic waste recycling machine through the opening under the casing.

In some embodiments, before using the heating device to heat the plastic mixture, a weight sensor can be used to obtain a weight corresponding to the plastic mixture in the heating device, and the processor can determine whether the weight is greater than or equal to A preset weight, wherein if the weight is greater than or equal to the preset weight, the outlet of the crushing device is closed and heated; if not, the plastic mixture continues to fall into the heating device.

In some embodiments, a telescopic rod is used to push the plastic brick out of the heating device.

In some embodiments, a pressurized gas is used to push the upper plastic brick out of the heating device.

The above brief description of the present invention is intended to provide a basic explanation of several aspects and technical features of the present invention. The brief description of the invention is not a detailed description of the present invention. Therefore, its purpose is not to specifically enumerate the key or important elements of the present invention, nor is it intended to provide a basic explanation of several aspects and technical features of the present invention. The purpose of defining the scope of the invention is to present several concepts of the invention in a concise manner.

The present invention relates to a plastic waste recycling machine and its operation method, in particular to a plastic waste recycling machine characterized by small size and its operation method. The term "small" here refers to the actual effective height of the plastic waste recycling machine 1 ranging from 120 cm to 150 cm, the actual effective width ranging from 60 cm to 80 cm, and the actual effective length ranging from 60 cm to 70 cm. Centimeter range situation.

In order to understand the technical features and practical effects of the present invention and implement it according to the contents of the description, the preferred embodiment as shown in the drawings is further described in detail as follows:

First, please refer to Figure 1. Figure 1 illustrates a plastic waste recycling machine 1 in an embodiment of the present invention. The plastic waste recycling machine 1 includes a housing 2, and a plastic waste recycling machine 1 is provided inside the housing 2. Crushing device 210, a heating device 230 and an imprinting device 220, in which an upper opening 2A of the housing 2 is connected to an inlet 210A of the crushing device 210; the heating device 230 is located at an outlet 210A of the crushing device 210. below; and the imprinting device 220 is located above the heating device 230 .

In this embodiment, the above-mentioned imprinting device 220 includes a frame assembly 220A and a pressing plate 220B, and the frame assembly 220A has a rotating part 2203, a first shaft 2201 and a second shaft 2202. One end of the first shaft 2201 is connected to the second shaft 2202, and the other end not connected to the second shaft 2202 is connected to the rotating part 2203, so that the pressure plate 220B can be located outside the rotating part 2203; The two ends of the two shafts 2202 are respectively connected to the upper and lower sides of the housing 2 and are provided with a track, so that the first shaft 2201 can travel along the track to control the pressure plate 220B to approach/move away from the heating device 230 .

In this embodiment, as shown in FIG. 1 , the rotating part 2203 is interposed between the crushing device 210 and the heating device 230 to drive the pressing plate 220B to rotate relative to the heating device 230 . Specifically, the rotating part 2203 is pivotally connected to one end of the first shaft 2201 and is located above the heating device 230. In this way, when the rotating part 2203 rotates around the axis of the first shaft 2201 (please refer to arrow N1 direction) will rotate the linked pressure plate 220B, so that the pressure plate 220B can travel from a standby position P1 to an imprinting position P2, and according to the above-mentioned operating principle of the first shaft 2201, after the first shaft 2201 is operated, the pressure plate 220B Due to the linkage, the heating device 230 can be further approached and pressed on it (please refer to the direction of arrow N2). At this time, since the relative positions of the standby position P1 and the imprinting position P2 are fixed, and the pressure plate 220B is linked to the first shaft 2201 and the rotating part 2203, the first shaft 2201 is moved away from the heating device 230 and the pivoting part by operating the first shaft 2201. 2203, the pressure plate 220B can further detach from the heating device 230 and return to the standby position P1.

Among them, although it is optimal to set the angle θ between the standby position P1 and the imprinting position P2 to 90°, it can be set arbitrarily in the range of 90° to 270°, and the present invention is not limited thereto.

The following uses Figure 1 and Figure 2 to explain how to use the plastic waste recycling machine 1 to process plastic waste.

First, a piece of plastic waste is put into the inlet 210A of the crushing device 210 from the opening 2A on the housing 2 and broken into multiple plastic mixtures, and these plastic mixtures are dropped into the heating device through the outlet 210A of the crushing device 210 230.

In some embodiments, plastic waste may include, but is not limited to, small plastic products such as plastic cup lids, plastic straws/tubes, and plastic cups/bottles; as well as polyethylene products such as lunch boxes, tableware, buffer materials, and packaging materials.

In some embodiments, conventional small crushers such as single-shaft crushers, dual-shaft crushers, and multi-shaft crushers can be used for the crushing device 210 to crush the above-mentioned plastic waste.

Then, the heating device 230 heats the plastic mixture therein at a temperature so that at least a part of the plastic mixture is in a molten state.

In some embodiments, various heaters can be used for the heating device 230, such as electrical heaters, steam heaters, far-infrared heaters, etc., as long as the plastic mixture can be heated enough to make at least a part of it The temperature at which the plastic system is in a molten state is sufficient.

In some embodiments, as for the temperature of the heating device 230, 150~275°C is preferred, 170~250°C is preferred, and 167~225°C is preferred.

Then, according to the operating principle of the first shaft 2201 and the rotating part 2203, the pressing plate 220B of the imprinting device 220 is further driven by the rotating part 2203 to rotate from the standby position P1 to the imprinting position P2, and through the first shaft 2201 drives the pressing plate 220B to press on the heating device 230 to imprint the plastic mixture located in the heating device 230 so that the plastic mixtures can adhere to each other/or fuse to form a plastic brick.

In some embodiments, the shape of the rotating portion 2203 can be a circular ring shape, a semicircular ring shape or a C-shaped shape, and has a diameter that can be set within a length range of 30 to 45 centimeters. Alternatively, only part of the rotating portion 2203 has an arc shape, and at this time, the pressure plate 220B is disposed along the tangential direction of the arc shape.

In some embodiments, the number of pressing plates 220B may be at least one; preferably at least two, and they are arranged in pairs and symmetrically outside the rotating part 2203. More specifically, as shown in Figure 1, the position of the rotating portion 2203 corresponding to each pressure plate 220B is on the same axis, and this axis is perpendicular to the axis of the first shaft 2201, whereby the pressure plates 220B can be relatively heated. The device 230 moves around the axis of the first shaft 2201 between the standby position P1 and the imprinting position P2.

In some embodiments, in order to enable the produced plastic bricks to be better stored, the pressing plate 220B of the imprinting device 220 can further cooperate with the heating device 230 to form a concave-convex matching structure with a geometric shape, so as to position the heating device 230 The plastic mixture on the brick is compacted to form a plastic brick of a specific shape (such as a four-sided shape, a hexagonal shape, or an octagonal shape, etc.). The height of the concave-convex fitting structure can be any value higher than 2 centimeters; however, it is not limited thereto. For example, the concave-convex fitting structure can have a maximum width of 21 centimeters and 18 centimeters and a maximum height of 5 centimeters. Hexagonal body. And in some embodiments, the heating device 230 may also include a corresponding and identical concave portion as the pressure plate 220B; or another concave-convex fitting structure with the same geometric shape but different heights to better control the plastic mixture in the concave-convex fitting structure. It is compacted and can produce plastic bricks that are higher than the original height.

Next, the pressure plate 220B is driven by the first shaft 2201 to move away from the heating device 230 to above it, and is driven by the rotating part 2203 to return the pressure plate 220B to the standby position P1 (please refer to the direction of arrow N3). ; At the same time, push the plastic bricks from the heating device 230 to the lower opening 2B of the housing 2, so that the plastic bricks can leave the plastic waste recycling machine 1 through the lower opening 2B.

In this embodiment, as shown in Figures 1 and 2, the above-mentioned heating device 230 also includes a weight sensor 2302. This weight sensor 2302 is disposed below the heating device 230, preferably at the bottom, to detect The heating device 230 senses the filling state of the plastic mixture and provides the sensed filling state of the plastic mixture to the processor. If the filling state of the plastic mixture does not reach a preset weight, the outlet 210A of the crushing device 210 is not closed; If the filling state of the plastic mixture is equal to or exceeds the preset weight, the outlet 210A is closed, and the plastic mixture in the heating device 230 is pressed by the first shaft 2201 and the rotating part 2203 to generate the above-mentioned plastic bricks.

In this embodiment, as shown in Figures 1 and 2, the above-mentioned heating device 230 further includes a push-out part 2301. This push-out part 2301 is located in the space defined by the heating device 230 and is opposite to the lower opening 2B of the housing 2. one side. Specifically, the push-out part 2301 is, for example, a telescopic rod, and the push-out part 2301 is combined with the heating device 230 through its elastic component; therefore, when the first shaft 2201 is moved and the pressure plate 220B is moved away from the heating device 230, the push-out part 2301 is relative to the heating device. 230 moves sideways, so that the plastic brick can be separated from the aforementioned space through the friction of one end of the push-out portion 2301. More specifically, the push-out part 2301 is, for example, a gas channel, and the push-out part 2301 selectively activates and deactivates a gas source to provide a pressurized gas that acts on the plastic brick; therefore, when the first shaft 2201 is moved and linked When the pressing plate 220B moves away from the heating device 230, the pushing part 2301 ejects pressurized gas to push the plastic brick to move inside the heating device 230 until it is completely out of the aforementioned space.

In this embodiment, as shown in Figure 3, the opening 2B below the housing 2 can also be connected to a recycling box, recycling bag or the like, so that the printed plastic bricks can be temporarily stored therein. It will be taken out when a recycling company collects it. In this way, since the plastic bricks in the recycling box are basically the same size, they can be pushed and placed in the recycling box in an orderly manner, and more plastic waste can be stored in the recycling box with a certain space. items to improve their storage capacity. For example, the plastic waste recycling machine 1 can be fixed above a recycling box with a plurality of suction cups provided outside the housing 2, and the opening 2B under the housing 2 can be communicated with the opening of the recycling box. Implement the foregoing.

In some embodiments, in order to improve the control of the heating temperature of the heating device 230, the above-mentioned heating temperature may further include a temperature sensor. When the heating device 230 heats the plastic mixture in it, the temperature sensor senses Measure the heating temperature of the heating device 230 and provide the sensed heating temperature to the processor. If the heating temperature does not reach a preset temperature, increase the output power of the heating device 230; if the heating temperature exceeds the preset temperature, reduce the heating device. 230 output power until reaching the preset temperature. The preset temperature can vary depending on the type of plastic waste stored. For example, when plastic waste is mixed with plastic straws, the preset temperature can be set to a temperature of about 170°C.

Next, please refer to Figure 4. Figure 4 illustrates a flow chart of the operation method of the plastic waste recycling machine 1 in an embodiment of the present invention. In step S1: the plastic waste can first be put into the crushing device 210 from the upper opening 2A of the housing 2 for crushing. Next, in step S2: use the heating device 230 to heat the plastic mixture dropped into it, so that part of the plastic mixture is in a molten state. Then, in step S3: first, the pressing plate 220B is moved from the standby position P1 to the imprinting position P2 by the rotating shaft rotating around the first shaft 2201, and then moves along the second axis by the first shaft 2201. Driven by the downward movement of the track of the rod 2202, the pressing plate 220B gradually approaches the heating device 230 and is finally pressed on it to compact the plastic mixture into plastic bricks. Finally, in step S4: again driven by the first shaft 2201 moving upward along the track of the second shaft 2202, the pressure plate 220B gradually moves away from the heating device 230 and rotates around the first shaft 2201 through the rotation axis. Driven by, the pressure plate 220B returns to the standby position P1; at the same time, the plastic bricks will separate from the heating device 230 and leave the plastic waste recycling machine 1 through the opening 2B under the housing 2.

In some embodiments, the above step S1 can further obtain a weight indicating the filling state of the plastic mixture in the heating device 230 through the weight sensor 2302, and the processor determines whether the weight is greater than or equal to a preset weight, where if If the weight is greater than or equal to the preset weight, then the discharge port 210A of the crushing device 210 is closed and the above step S2 is entered. On the contrary, if the weight is less than the preset weight, the step S2 is not entered and continues. The plastic mixture is dropped into the heating device 230.

In summary, although the present invention has been disclosed above through embodiments, they are not intended to limit the present invention. Those with ordinary skill in the technical field to which the present invention belongs can make various modifications and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the appended patent application scope.

1‧‧‧Plastic waste recycling machine 2‧‧‧Shell 2A‧‧‧Upper opening 2B‧‧‧Lower opening 3‧‧‧Recycling bin 4‧‧‧Plastic bricks 210‧‧‧Broken device 210A‧‧‧Inlet 210B‧‧‧Discharge port 220‧‧‧Imprinting device 220A‧‧‧Frame set 2201‧‧‧First shaft 2202‧‧‧Second shaft 2203‧‧‧Rotating part 220B‧‧‧pressure plate 230‧‧‧Heating device 2301‧‧‧Launch Department 2302‧‧‧Weight sensor P1‧‧‧Standby position P2‧‧‧Imprinting position θ‧‧‧included angle N1‧‧‧arrow N2‧‧‧arrow N3‧‧‧arrow Steps S1~S4‧‧‧

Figure 1 is a schematic diagram of a plastic waste recycling machine according to an embodiment of the present invention.

Figure 2 is another schematic diagram of a plastic waste recycling machine according to an embodiment of the present invention.

Figure 3 is another schematic diagram of a plastic waste recycling machine according to an embodiment of the present invention.

Figure 4 is a schematic flowchart of the operation method of the plastic waste recycling machine in one embodiment of the present invention.

1‧‧‧Plastic waste recycling machine 2‧‧‧Shell 2A‧‧‧Upper opening 2B‧‧‧Lower opening 210‧‧‧Broken device 210A‧‧‧Inlet 210B‧‧‧Discharge port 220‧‧‧Imprinting device 220A‧‧‧Frame set 2201‧‧‧First shaft 2202‧‧‧Second shaft 2203‧‧‧Rotating part 220B‧‧‧pressure plate 230‧‧‧Heating device P1‧‧‧Standby position P2‧‧‧Imprinting position θ‧‧‧included angle N1‧‧‧arrow N2‧‧‧arrow

Claims (10)

A plastic waste recycling machine includes: a shell with an upper opening and a lower opening; a crushing device located in the shell, the crushing device includes an inlet and an outlet, and the inlet The opening is connected to the upper opening of the shell; a heating device is located in the shell and below the discharge port of the crushing device; a stamping device is located in the shell and is located in the heating device Above, the imprinting device includes: a frame group with a rotating part, a first shaft and a second shaft. The first shaft is connected to the second shaft with one end and is tied to the other One end is connected to the rotating part, and the two ends of the second shaft are connected to the housing respectively; and a pressure plate is provided outside the rotating part and can rotate around the first shaft from a standby position to a The printing position is movable along the second shaft from the printing position to the heating device. The plastic waste recycling machine of claim 1 further includes a processor and a weight sensor, the weight sensor is connected to the processor, and the weight sensor is used to sense one of the components in the heating device. A weight of plastic mixture. The plastic waste recycling machine of claim 1, wherein at least a part of the rotating part is arc-shaped. The plastic waste recycling machine of claim 3, wherein the pressing plate is arranged along the tangent direction of the arc. The plastic waste recycling machine of claim 1, wherein the number of the pressing plates is at least one. The plastic waste recycling machine of claim 1, wherein the geometric shapes of the pressure plate and the heating device match each other. An operation method of a plastic waste recycling machine, for the plastic waste recycling machine described in claim 1. The operation method of the plastic waste recycling machine includes: S1. Put a plastic waste into the opening on the housing. The inlet of the crushing device is broken into a plastic mixture, and the plastic mixture is moved from the outlet of the crushing device into the heating device; S2. The heating device heats the plastic mixture at a temperature; S3. Sequentially Operate the rotating part and the first shaft to first rotate the pressing plate from the standby position to the imprinting position, and then move the pressure plate closer to the heating device from the imprinting position, so that the heated plastic mixture A plastic brick can be formed; and S4, the first shaft and the rotating part are sequentially operated to push the plastic brick out of the heating device while returning the pressure plate to the standby position, so that the plastic brick can automatically The heating device is detached and can leave the plastic waste recycling machine through the lower opening of the housing. The operation method of the plastic waste recycling machine as described in claim 7, wherein the aforementioned step S1 further includes: a processor obtains a weight corresponding to the plastic mixture in the heating device through a weight sensor, and determines Whether the weight is greater than or equal to a preset weight, if the weight is greater than or equal to the preset weight, then close the discharge port of the crushing device and enter step S2; if not, do not enter step S2. The operation method of the plastic waste recycling machine as described in claim 7, wherein in the aforementioned step S4, the heating device further has a push-out part, the push-out part pushes the plastic brick out of the heating device, wherein the push-out part is a telescopic rod . The operation method of the plastic waste recycling machine as described in claim 7, wherein the aforementioned steps S4, the heating device further has a push-out part, which pushes the plastic brick out of the heating device, wherein the push-out part is a pressurized gas.

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