Melting device and method for plastic product processing

Abstract

The invention belongs to the technical field of plastic product processing, and particularly relates to a melting device and method for plastic product processing. Comprising a device table, and a furnace body is installed on the device table and used for heating and melting broken raw materials; two sets of distance adjusting shearing devices are arranged on the device table and symmetrically located on the top of the device table. The distance-adjusting shearing device comprises a distance-adjusting transverse plate, and an elastic conversion mechanism is arranged on the distance-adjusting transverse plate; the positioning square column is connected to the side surface of the distance adjusting transverse plate in a penetrating manner and is in sliding fit with the distance adjusting transverse plate; a positioning square plate; the positioning columns are mounted at the end points of the positioning square columns; the two positioning square plates are oppositely arranged, and shear knives are arranged on the opposite faces of the two positioning square plates and used for cutting raw materials. The shearing size of raw materials can be controlled according to conditions, the situation that large materials are difficult to melt rapidly due to the fact that the size of crushed materials is difficult to match with shearing and melting requirements is avoided, the time required for melting is prevented from being increased, the productivity and efficiency of the device are improved, and therefore the limitation of the device during melting is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of plastic product processing, and specifically relates to a melting device and method for plastic product processing. Background Art

[0002] Plastic products are general terms for daily necessities, industrial products, etc. processed mainly using plastics; including products of all processes such as injection molding and thermoforming using plastics as raw materials. Plastics are a type of synthetic polymer material with plasticity. During the production and processing of plastic products, a melting device is usually used to melt the raw materials used in the production of plastic products.

[0003] During the use of existing melting devices for plastic product processing, when encountering relatively large raw materials, it is necessary to cut the large raw materials into several pieces of broken materials. However, the device cannot control the cutting size according to the situation during use, resulting in difficulty in matching the size of the broken materials with the requirements of shearing (melting). Large pieces of materials are difficult to melt quickly, further increasing the required time for melting, thereby reducing the production capacity and efficiency of the device, and correspondingly increasing the limitations of the device when melting plastics. Summary of the Invention

[0004] In view of the above situation, to overcome the defects of the prior art, the present invention provides a melting device and method for plastic product processing, effectively solving the problems in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solution: A melting device for plastic product processing includes a device table, on which a furnace body is installed for heating and melting the broken raw materials; a distance-adjusting shearing device is provided on the device table for controlling the size of the sheared fabric; the number of the distance-adjusting shearing devices is two groups, and they are symmetrically located at the top of the device table; the distance-adjusting shearing device includes a distance-adjusting cross plate, on which an elastic conversion mechanism is provided for adjusting the shearing strength; A positioning square column, which penetrates and is connected to the side of the distance-adjusting cross plate, and the two are slidably matched; A positioning square plate; which is installed at the end point of the positioning square column; the two positioning square plates are arranged oppositely, and shearing knives are provided on the opposite surfaces for cutting raw materials; a displacement fastening component is also provided on the positioning square plate for fixedly clamping the shearing knife; The elastic conversion mechanism includes a first T-shaped table, which is installed on the top of the distance-adjusting cross plate; The displacement fastening component includes a fixed square seat, which is connected to the top of the device table away from the distance-adjusting cross plate.

[0006] Preferably, it includes a fixed pulley, which is installed at the edge of the positioning square plate on the side away from the shearing knife; The winding roller is located on the same side as the fixed pulley; and the two are symmetrically arranged with respect to the horizontal central axis of the distance-adjusting cross plate; The wire harness has one end connected to the fixed square seat, and the other end bypasses the fixed pulley and winds around the winding roller; The positioning rotating shaft is rotatably connected to the winding roller; a clockwork spring is also installed on the positioning rotating shaft; The first bevel gear is installed on the positioning rotating shaft; The second bevel gear is meshed and connected with the first bevel gear; The driving rotating shaft is installed on the second bevel gear; one end of the driving rotating shaft is connected to the positioning square plate, and the other end is installed with a positioning gear.

[0007] Preferably, it includes positioning racks. The two positioning racks are symmetrically arranged with respect to the center of the positioning gear and are meshed with each other; a positioning sliding column is installed on the positioning rack, and a positioning base is slidably connected to the positioning sliding column, and the positioning base is installed on the positioning square plate; a blocking cross plate is installed on the positioning rack; the two blocking cross plates are located on both sides of the positioning square plate; blocking square cylinders are provided at the opposite surfaces of the two blocking cross plates, and a blocking square column is slidably connected in the blocking square cylinder. One end of the blocking square column away from the blocking cross plate is installed with a blocking square plate; a blocking spring is provided in the blocking square cylinder, one end of which is fixedly connected to the blocking square cylinder, and the other end is fixedly connected to the blocking square column; rubber buffer pads are provided at the opposite surfaces of the two blocking square plates; the end point of the shear blade is located on the moving path of the rubber buffer pad.

[0008] Preferably, it includes guiding threaded blocks, which are installed on both sides of the distance-adjusting cross plate; The guiding sliding groove is arranged at the top of the device table; the guiding sliding groove is slidably matched with the guiding threaded block; The guiding screw rod is connected in the guiding sliding groove; the guiding screw rod is threadedly connected with the guiding threaded block; The driving motor is installed on the device table; the end point of the guiding screw rod extends outside the guiding sliding groove and is rotatably connected to the output end of the driving motor.

[0009] Preferably, a number of horizontal and vertical limiting slots are separately provided at the opposite surfaces of the positioning square plates on the two elastic conversion mechanisms, and the shear blade is located in the limiting slots; a friction pad is also provided in the limiting slots, and the friction pad is connected to the shear blade; the shear blades at each positioning square plate are arranged parallel to the positioning rack.

[0010] Preferably, a positioning spring is sleeved on the positioning square column, one end of the positioning spring is fixedly connected to the positioning square plate, and the other end is fixedly connected to the distance-adjusting cross plate.

[0011] Preferably, it includes a locking slot, which is provided through the top of the positioning square column; A driving cylinder, one end of which is fixedly installed on the top of the first T-shaped table, and the other end is connected with a driving limit plate; A driving slider; the end point of the driving cylinder penetrates through the bottom of the driving slider, and the two are slidably matched; A driving spring, which is sleeved on the driving cylinder; one end of the driving spring is fixedly connected with the driving limit plate, and the other end is fixedly connected with the top of the driving slider.

[0012] Preferably, extension cross plates are installed on both sides of the driving slider, locking inserts are installed on the side of the extension cross plate close to the device table, and the locking inserts penetrate through the top of the distance-adjusting cross plate and are connected with the locking slots; a pull ring is also installed on the extension cross plate, and a first contact piece is arranged on the pull ring; second contact pieces are arranged on the opposite surfaces of the extension cross plate and the driving limit plate.

[0013] Preferably, it includes a braking square hole; a number of braking square holes are arranged on the side wall of the driving cylinder; A second T-shaped table, which is arranged on the side of the driving slider; an electric telescopic rod is arranged on the side of the second T-shaped table away from the driving slider, and a braking square block is installed on the output end thereof; the braking square block is connected with one of the braking square holes.

[0014] The present invention also provides a melting method for plastic product processing, including the following steps: S1. The raw material enters the furnace body between the opposite surfaces of the two positioning square plates, and the relative movement of the two positioning square plates enables the shearing knives thereon to cut the passing raw material into several pieces of broken materials; S2. After the raw material is cut into several pieces of broken materials, it will enter the furnace body, and then the broken materials are heated to complete the hot melting operation; S3. Operate the elastic conversion mechanism to adjust the shearing strength of the shearing knives on the raw material; S4. During the shearing process of the shearing knives, automatically control the displacement fastening assembly to prevent the shearing knives from shaking during use.

[0015] As can be seen from the above, a melting device for plastic product processing provided by the present invention has the effect of controlling the shearing size of the raw material as required during use, avoiding the difficulty in matching the size of the broken materials with the shearing (melting) requirements, thereby avoiding the increase in the required time for melting due to the difficulty in quickly melting large pieces of materials, improving the production capacity and efficiency of the device, and thus reducing the limitations of the device during melting. Description of the Drawings

[0016] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention.

[0017] In the drawings: Figure 1 It is one of the overall structural schematic diagrams of the present invention; Figure 2 Explosion diagram of the locking slot of the present invention; Figure 3 Cross-sectional view of the blocking square tube of the present invention; Figure 4 Second schematic diagram of the overall structure of the present invention; Figure 5 Schematic diagram of the structure of the guiding threaded block of the present invention; Figure 6 Schematic diagram of the structure of the fixed pulley of the present invention; Figure 7 Explosion diagram of the shear blade of the present invention; Figure 8 Schematic diagram of the structure of the braking square block of the present invention; Figure 9 Schematic diagram of the structure of the braking square hole of the present invention; Figure 10 For the present invention Figure 6 Partial enlarged structure diagram at position A in; In the figure: 1, device table; 2, furnace body; 3, distance-adjusting cross plate; 4, positioning square column; 5, positioning square plate; 6, shear blade; 7, first T-shaped table; 8, fixed square seat; 9, fixed pulley; 10, winding roller; 11, wire harness; 12, positioning rotating shaft; 13, hairspring; 14, first bevel gear; 15, second bevel gear; 16, driving rotating shaft; 17, positioning gear; 18, positioning rack; 19, positioning sliding column; 20, positioning base; 21, blocking cross plate; 22, blocking square tube; 23, blocking square column; 24, blocking square plate; 25, blocking spring; 26, rubber buffer pad; 27, guiding threaded block; 28, guiding chute; 29, guiding lead screw; 30, driving motor; 31, limiting slot; 32, friction pad; 33, positioning spring; 34, locking slot; 35, driving cylinder; 36, driving limiting plate; 37, driving slider; 38, driving spring; 39, extending cross plate; 40, locking plug; 41, pull ring; 42, first contact piece; 43, second contact piece; 44, braking square hole; 45, second T-shaped table; 46, electric telescopic rod; 47, braking square block. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0019] Embodiment, consisting of Figures 1 to 10Provided, the present invention includes a device table 1, on which a furnace body 2 is installed for heating and melting the broken raw materials; a distance-adjusting shearing device is arranged on the device table 1 for controlling the size of the sheared fabric; the number of the distance-adjusting shearing devices is two groups, and they are symmetrically located at the top of the device table 1; the distance-adjusting shearing device includes a distance-adjusting cross plate 3, and an elastic conversion mechanism is arranged on the distance-adjusting cross plate 3 for adjusting the shearing strength; A positioning square column 4, which penetrates and is connected to the side surface of the distance-adjusting cross plate 3, and the two are slidably matched; A positioning square plate 5; which is installed at the end point of the positioning square column 4; the two positioning square plates 5 are arranged oppositely, and shearing knives 6 are arranged on the opposite surfaces for cutting raw materials; a displacement fastening assembly is also arranged on the positioning square plate 5 for fixedly clamping the shearing knife 6; Guide thread blocks 27, which are installed on both sides of the distance-adjusting cross plate 3; Guide sliding grooves 28, which are arranged on the top of the device table 1; the guide sliding grooves 28 are slidably matched with the guide thread blocks 27; A guide lead screw 29, which is connected in the guide sliding groove 28; the guide lead screw 29 is threadedly connected with the guide thread block 27; A driving motor 30, which is installed on the device table 1; the end point of the guide lead screw 29 extends outside the guide sliding groove 28 and is rotationally connected to the output end of the driving motor 30; A plurality of horizontal and vertical limit slots 31 are separately arranged on the opposite surfaces of the positioning square plates 5 of the two elastic conversion mechanisms, and the shearing knife 6 is located in the limit slots 31; a friction pad 32 is also arranged in the limit slots 31 and is connected with the shearing knife 6; the shearing knife 6 at each positioning square plate 5 is arranged parallel to the positioning rack 18; A positioning spring 33 is sleeved on the positioning square column 4, one end of the positioning spring 33 is fixedly connected with the positioning square plate 5, and the other end is fixedly connected with the distance-adjusting cross plate 3; Start the drive motor 30 to make its output end rotate forward and backward, driving the guiding lead screw 29 to rotate, and then enabling the guiding threaded block 27 connected by threads to move in a reciprocating and limited manner within the guiding chute 28, so as to drive the distance-adjusting cross plate 3 to move reciprocally. One distance-adjusting shear device has one distance-adjusting cross plate 3, which can make the two distance-adjusting cross plates 3 move relatively and away from each other continuously. When the distance-adjusting cross plate 3 moves, it drives the positioning square plate 5 to move through the positioning square column 4 and the positioning spring 33, so that the two positioning square plates 5 move towards and away from each other continuously; and the shear blades 6 are arranged on the positioning square plates 5, so as to drive the shear blades 6 on both sides to move reciprocally. When moving relatively, the several horizontally and vertically arranged shear blades 6 come into contact with each other, so as to cut the raw material into several small fragments, avoiding the difficulty of melting the plastic due to its large size during the melting process, thereby improving the melting efficiency of the device; at the same time, the shear blades 6 are installed in the limit slots 31, and their number is set to be several. The operator can install several horizontally and vertically arranged shear blades 6 according to the melting requirements and the shear size requirements. Different combinations of the number of horizontal and vertical shear blades 6 can cut the raw material into fragments of different sizes; at the same time, the shear blades 6 are installed in the limit slots 31, and the shear blades 6 can be installed in the limit slots 31 through the friction pads 32 provided therein. The installation and disassembly processes are convenient and fast, and can be completed without any tools, facilitating the installation of different numbers of shear blades 6 for shearing operations, enabling the device to control the shear size of the raw material as needed during use, avoiding the difficulty of matching the size of the fragments with the shear (melting) requirements, thereby avoiding the increase in the required time for melting due to the difficulty of quickly melting large pieces of material, improving the production capacity and efficiency of the device, and thus reducing the limitations of the device during melting.

[0020] The elastic conversion mechanism of this embodiment includes a first T-shaped platform 7, which is installed on the top of the distance-adjusting cross plate 3; A locking slot 34, which is penetrated through the top of the positioning square column 4; A driving cylinder 35, one end of which is fixedly installed on the top of the first T-shaped platform 7, and the other end is connected with a driving limit plate 36; A driving slider 37; the end point of the driving cylinder 35 penetrates through the bottom of the driving slider 37, and the two are in sliding fit; A driving spring 38, which is sleeved on the driving cylinder 35; one end of the driving spring 38 is fixedly connected with the driving limit plate 36, and the other end is fixedly connected with the top of the driving slider 37; On both sides of the driving slider 37, extension cross plates 39 are installed. On the side of the extension cross plate 39 close to the device table 1, a locking plug 40 is installed. The locking plug 40 penetrates through the top of the distance-adjusting cross plate 3 and is connected with the locking slot 34; a pull ring 41 is also installed on the extension cross plate 39, and a first contact piece 42 is provided on the pull ring 41; second contact pieces 43 are provided on the opposite surfaces of the extension cross plate 39 and the driving limit plate 36; Brake square hole 44; A number of brake square holes 44 are arranged on the side wall of the driving cylinder 35; The second T-shaped platform 45 is arranged on the side of the driving slider 37; An electric telescopic rod 46 is provided on the side of the second T-shaped platform 45 away from the driving slider 37, and a brake square block 47 is installed on its output end; The brake square block 47 is connected to one of the brake square holes 44; When the device shears raw materials, they are put in from above the furnace body 2 and will pass between the opposite surfaces of the two positioning square plates 5. When the two positioning square plates 5 drive the shearing knives 6 in the horizontal and vertical directions to move reciprocally, it is worth mentioning that the initial position of the locking plug 40 is located in the locking slot 34, so as to limit the positioning square column 4 in the current position, so that the opposite shearing knives 6 cannot cause the positioning square plates 5 to move when shearing the raw materials, so that the relatively contacting shearing knives 6 are in rigid contact, which is used for using easily cut raw materials, so that the opposite shearing knives 6 can quickly perform the shearing operation, so as to improve the shearing efficiency and also improve the melting efficiency of the device; At the same time, when the device cuts raw materials that are inconvenient to shear, the pull ring 41 can be held by hand, so that the hand will touch the first contact piece 42, and the signal will be transmitted to the control center. After its judgment, the electric telescopic rod 46 is started, so that it can drive the brake square block 47 on its output end to move away from the driving cylinder 35, and then the brake square block 47 is no longer connected to the brake square hole 44, so as to release the limit setting of the driving slider 37. At this time, the pull ring 41 can be pulled upward, so that the extended horizontal plate 39 on it can be limitedly moved on the driving cylinder 35 through the driving slider 37, so that the driving spring 38 is in a buffered state, and then drive the locking plug 40 on the extended horizontal plate 39 to disengage from the distance-adjusting horizontal plate 3 and no longer be connected to the locking slot 34, so as to release the limit setting of the positioning square column 4. When the shearing knives 6 in the horizontal and vertical directions are in contact, through the continuous movement of the guiding thread block 27, the distance-adjusting horizontal plate 3 is limitedly moved on the positioning square column 4, so that the positioning spring 33 is in a buffered state, so as to strengthen the contact strength between the two shearing knives 6 on both sides. At the same time, the contact between the two is a flexible contact, so as to avoid damage caused by excessive strength when using the shearing knives 6. And when the relatively shearing knives 6 are continuously applied with strength and contact the raw materials that are not easy to cut, through the continuous movement of the guiding thread block 27, the contact strength and friction force of the shearing knives 6 on the raw materials are continuously strengthened, so that the shearing force of the device on the raw materials can be greater than the raw materials themselves, so as to shear the raw materials that are not easy to cut into several pieces for melting operation, so that the device can select the corresponding state according to the situation for different properties of raw materials to operate the shearing knives 6 to cut the raw materials, thereby reducing the limitations of the device in use and improving the use effect of the device; It is worth mentioning that when the limit setting for the positioning square column 4 is released, the operator pulls the driving slider 37. When the second contact piece 43 on the extended horizontal plate 39 thereon contacts the second contact piece 43 on the driving limit plate 36, it means that the driving slider 37 has moved to the maximum height. At this time, the height is such that the positioning square column 4 is in an unconstrained state. The contact of the two second contact pieces 43 sends a signal to the control center to control the output end of the electric telescopic rod 46 to drive the braking square block 47 to reset and move so that it is connected to one of the braking square holes 44, thereby automatically limiting the driving slider 37 at the current position, enabling the device to maintain the current state for a long time to perform shearing operations on raw materials that are not easy to cut, so as to reduce the working intensity of the operator; at the same time, when the driving slider 37 is limited, the driving spring 38 that was originally in a buffered state cannot be reset, and the elastic force it brings will act on the driving slider 37 to increase the friction and strength of the contact between the braking square hole 44 and the braking square block 47, so as to prevent the locking plug 40 from breaking this state due to non-human factors when the limit setting for the locking slot 34 is released, reducing the limitations of the device during use and improving the melting effect and efficiency of the device on plastics.

[0021] The displacement fastening assembly of this embodiment includes a fixed square seat 8, which is connected to the top of the device table 1 away from the distance-adjusting horizontal plate 3; A fixed pulley 9, which is installed at the edge of the positioning square plate 5 on the side away from the shearing knife 6; A winding roller 10, whose position is on the same side as the fixed pulley 9; and the two are symmetrically arranged with respect to the horizontal central axis of the distance-adjusting horizontal plate 3; A wire harness 11, one end of which is connected to the fixed square seat 8, and the other end bypasses the fixed pulley 9 and is wound around the winding roller 10; A positioning rotating shaft 12, which is rotatably connected to the winding roller 10; a clockwork spring 13 is also installed on the positioning rotating shaft 12; A first bevel gear 14, which is installed on the positioning rotating shaft 12; A second bevel gear 15, which is meshed and connected to the first bevel gear 14; A driving rotating shaft 16, which is installed on the second bevel gear 15; one end of the driving rotating shaft 16 is connected to the positioning square plate 5, and the other end is installed with a positioning gear 17; Positioning racks 18 are provided. The two positioning racks 18 are symmetrically arranged with the center of the positioning gear 17 as the axis of symmetry, and the two are meshed and connected. A positioning sliding column 19 is installed on the positioning rack 18. A positioning base 20 is slidably connected to the positioning sliding column 19, and it is installed on the positioning square plate 5. A blocking cross plate 21 is installed on the positioning rack 18. The two blocking cross plates 21 are located on both sides of the positioning square plate 5. Blocking square cylinders 22 are provided at the opposite faces of the two blocking cross plates 21. A blocking square column 23 is slidably connected in the blocking square cylinder 22. A blocking square plate 24 is installed at the end of the blocking square column 23 away from the blocking cross plate 21. A blocking spring 25 is provided in the blocking square cylinder 22. One end of the blocking spring 25 is fixedly connected to the blocking square cylinder 22, and the other end is fixedly connected to the blocking square column 23. Rubber buffer pads 26 are provided at the opposite faces of the two blocking square plates 24. The end point of the shearing knife 6 is located on the moving path of the rubber buffer pad 26. When the device shears the raw material, the two positioning square plates 5 move relative to each other. During this movement, under the action of the fixed square seat 8, the fixed pulley 9 and the wire harness 11, the winding roller 10 can be driven to unwind and rotate, so that the clockwork spring 13 on it is in a buffer state. When the clockwork spring 13 resets, it can drive the winding roller 10 to reset and rotate while winding the wire harness 11. When the positioning rotating shaft 12 rotates, it drives the first bevel gear 14 to rotate, which meshes with the second bevel gear 15 to rotate, so that the driving rotating shaft 16 on it can drive the positioning gear 17 to rotate, and then the two opposite positioning racks 18 can be meshed to move. The blocking cross plates 21 on the two positioning racks 18 move relative to each other, so that the blocking cross plates 21 drive the blocking square plates 24 to move under the action of the blocking square cylinders 22 and the blocking square columns 23, and the two blocking square plates 24 move relative to each other, and the two ends close to the shearing knife 6 move and contact, so that the shearing knife 6 can be clamped and limited, avoiding the dislocation phenomenon caused by excessive strength when the two side shearing knives 6 contact, improving the installation effect of the shearing knife 6, and improving the shearing effect on the raw material; at the same time, through the rubber buffer pads 26, the contact strength and friction force between the blocking square plates 24 and the shearing knife 6 can be increased, further improving the use and installation effects of the shearing knife 6; it is worth mentioning that due to the buffer performance brought by the rubber buffer pads 26 and the blocking springs 25, the shearing knife 6 can be prevented from being damaged due to impacts during use, thus improving the stability of the shearing knife 6 during use, and further improving the cutting effect on the raw material. The greater the contact strength of the relatively moving shearing knives 6, the higher the clamping strength on them, thus avoiding the dislocation and instability of the shearing knife 6 during use, reducing the limitations of the device during use, and improving the cutting effect of the device on the raw material, which will also lead to the improvement of the melting effect and efficiency of the raw material.

[0022] The present invention also provides a melting method for plastic product processing, including the following steps: S1. The raw material enters the furnace body between the opposite surfaces of two positioning square plates. The relative movement of the two positioning square plates enables the shearing knives on them to cut the passing raw material into several pieces. S2. After the raw material is cut into several pieces, it will enter the furnace body, and then the pieces are heated to complete the hot melting operation. S3. Operate the elastic conversion mechanism to adjust the shearing strength of the shearing knives on the raw material. S4. During the shearing process of the shearing knives, automatically control the displacement fastening assembly to prevent the shearing knives from shaking during use.

[0023] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0024] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A melting device for plastic product processing, including a device table, on which a furnace body is installed, which is used to heat and melt the broken raw materials; characterized in that: A distance-adjusting shearing device is arranged on the device table, which is used to control the size of the sheared fabric; the number of the distance-adjusting shearing devices is two groups, and they are symmetrically located at the top of the device table; the distance-adjusting shearing device includes a distance-adjusting cross plate, and an elastic conversion mechanism is arranged on the distance-adjusting cross plate, which is used to adjust the shearing strength; A positioning square column, which is connected through the side surface of the distance-adjusting cross plate, and the two are slidably matched; A positioning square plate; it is installed at the end point of the positioning square column; the two positioning square plates are arranged oppositely, and shearing knives are arranged at the opposite surfaces, which are used to cut raw materials; a displacement fastening component is also arranged on the positioning square plate, which is used to fixedly clamp the shearing knife; The elastic conversion mechanism includes a first T-shaped table, which is installed on the top of the distance-adjusting cross plate; The displacement fastening component includes a fixed square seat, which is connected to the top of the device table away from the distance-adjusting cross plate.

2. The melting device for plastic product processing according to claim 1, characterized in that: It includes a fixed pulley, which is installed at the edge of the positioning square plate on the side away from the shearing knife; A winding roller, whose position is on the same side as the fixed pulley; and the two are symmetrically arranged with the horizontal central axis of the distance-adjusting cross plate as the axis of symmetry; A wire harness, one end of which is connected to the fixed square seat, and the other end bypasses the fixed pulley and is wound on the winding roller; A positioning rotating shaft, which is rotatably connected to the winding roller; a hairspring is also installed on the positioning rotating shaft; A first bevel gear, which is installed on the positioning rotating shaft; A second bevel gear, which is meshed and connected with the first bevel gear; A driving rotating shaft, which is installed on the second bevel gear; one end of the driving rotating shaft is connected to the positioning square plate, and the other end is installed with a positioning gear.

3. A melting device for plastic product processing according to claim 2, wherein: It includes a positioning rack, the two positioning racks are symmetrically arranged with the center of the positioning gear as the axis of symmetry, and the two are meshed and connected; a positioning sliding column is installed on the positioning rack, and a positioning base is slidably connected to the positioning sliding column, which is installed on the positioning square plate; a blocking cross plate is installed on the positioning rack; the two blocking cross plates are located on both sides of the positioning square plate; blocking square cylinders are arranged at the opposite surfaces of the two blocking cross plates, a blocking square column is slidably connected in the blocking square cylinder, and one end of the blocking square column away from the blocking cross plate is installed with a blocking square plate; a blocking spring is arranged in the blocking square cylinder, one end of which is fixedly connected to the blocking square cylinder, and the other end is fixedly connected to the blocking square column; rubber buffer pads are arranged at the opposite surfaces of the two blocking square plates; the end point of the shearing knife is located on the moving path of the rubber buffer pad.

4. A melting device for plastic product processing according to claim 1, characterized in that: It includes a guiding threaded block, which is installed on both sides of the distance-adjusting cross plate; A guiding sliding groove, which is arranged on the top of the device table; the guiding sliding groove is slidably matched with the guiding threaded block; A guiding lead screw, which is connected in the guiding sliding groove; the guiding lead screw is threadedly connected with the guiding threaded block; A driving motor, which is installed on the device table; the end point of the guiding lead screw extends outside the guiding sliding groove and is rotatably connected to the output end of the driving motor.

5. A melting device for plastic product processing according to claim 4, characterized in that: A plurality of horizontal and vertical limiting slots are separately arranged at the opposite surfaces of the positioning square plates on the two elastic conversion mechanisms, and the shearing knife is located in the limiting slots; a friction pad is also arranged in the limiting slots, which is connected with the shearing knife; the shearing knives at each positioning square plate are arranged parallel to the positioning rack.

6. The melting device for plastic product processing according to claim 5, wherein: A positioning spring is sleeved on the positioning square column, one end of the positioning spring is fixedly connected to the positioning square plate, and the other end is fixedly connected to the distance-adjusting cross plate.

7. A melting device for plastic product processing according to claim 1, characterized in that: It includes a locking slot which is disposed through the top of the positioning square column; A driving cylinder, one end of which is fixedly installed on the top of the first T-stage, and the other end is connected with a driving limiting plate; A driving slider; the end point of the driving cylinder penetrates through the bottom of the driving slider, and the two are in sliding fit; A driving spring which is sleeved on the driving cylinder; one end of the driving spring is fixedly connected with the driving limiting plate, and the other end is fixedly connected with the top of the driving slider.

8. The melting device for plastic product processing according to claim 7, characterized in that: On both sides of the driving slider, extension cross plates are installed. On the side of the extension cross plate close to the device stage, locking inserts are installed. The locking inserts penetrate through the top of the distance-adjusting cross plate and are connected with the locking slot at the same time; a pull ring is also installed on the extension cross plate, and a first contact piece is arranged on the pull ring; second contact pieces are arranged on the opposite surfaces of the extension cross plate and the driving limiting plate.

9. A melting device for plastic product processing according to claim 8, characterized in that: It includes a braking square hole; a plurality of braking square holes are arranged on the side wall of the driving cylinder; A second T-stage which is arranged on the side of the driving slider; on the side of the second T-stage away from the driving slider, an electric telescopic rod is provided, and a braking square block is installed on the output end thereof; the braking square block is connected with one of the braking square holes.

10. A melting method for plastic product processing, using the plastic product processing melting device as described in claim 1, characterized in that, It includes steps: S1. The raw material enters the furnace body between the opposite surfaces of the two positioning square plates. The relative movement of the two positioning square plates enables the shearing knives thereon to cut the passing raw material into several pieces of broken materials; S2. After the raw material is cut into several pieces of broken materials, it will enter the furnace body, so as to heat the broken materials to complete the hot melting operation; S3. Operate the elastic conversion mechanism to adjust the shearing strength of the shearing knives for the raw material; S4. During the shearing process of the shearing knives, automatically control the displacement fastening assembly to prevent the shearing knives from shaking during use.

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