Feeding and impurity removing device of blow molding machine

Abstract

The utility model provides a feeding and impurity removing device of a blow molding machine, and aims to solve the technical problem that impurities are not thoroughly removed when raw materials of an existing blow molding machine are fed. The device comprises a feeding box with a feeding port formed in the top and a first discharging port and a second discharging port formed in the bottom, and the first discharging port and the second discharging port are each provided with an electric control valve; the impurity removal structure comprises an iron rod arranged in the feeding box; a plurality of bulges are arranged on the outer wall of the iron rod; the first electromagnet is arranged in the cavity; the driving motor is mounted on the feeding box and is in driving connection with the iron rod, and the iron rod can rotate in the feeding box under the driving of the driving motor. The rotatable iron rod is arranged in the feeding box, the first electromagnet is arranged in the iron rod, magnetic impurities in raw materials are adsorbed while the raw materials are stirred, the iron rod can make full contact with the raw materials, impurities are removed more thoroughly, the rejection rate of plastic products is reduced, and the impurity removal efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of blow molding machines, in particular to a feed impurity removal device for a blow molding machine. Background Art

[0002] With the birth of high-density polyethylene and the development of blow molding machines, blow molding technology has been widely used. Plastic bottle blow molding usually includes processes such as raw material preparation, feeding, heating and blow molding. In the feeding link, it is usually necessary to remove magnetic impurities in the plastic raw materials (granules or liquids) to improve the quality of plastic products. At present, the means of removing impurities is usually to fix an electromagnet on the inner wall of the feed of the blow molding machine to adsorb metal impurities. This method of impurity adsorption is not thorough enough. For example, the Chinese invention patent with publication number CN109016463B discloses a blow molding machine feed impurity removal device, which is fixedly connected to a support plate on one side of the inner body of the box, and an electromagnet and a material receiving trough are fixedly connected to one surface of the support plate to adsorb metal impurities. The device sets the electromagnet on the inner wall of the box, and the electromagnet is difficult to fully contact with the raw material. The impurity removal is not very thorough, which affects the quality of the plastic products. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the utility model is to provide a blow molding machine feed impurity removal device, which solves the technical problem that the existing blow molding machine raw material feeding impurities are not thoroughly removed.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A feeding and impurity removing device for a blow molding machine comprises: a feeding box, with a feeding port on the top, and a first discharge port and a second discharge port on the bottom, wherein the first discharge port and the second discharge port are both provided with electric control valves; an impurity removing structure comprises: an iron rod, which is arranged in the feeding box; a cavity is arranged inside the iron rod, and a plurality of protrusions are arranged on the outer wall; a first electromagnet is arranged in the cavity; a driving motor is installed on the feeding box and is drivingly connected to the iron rod, and the iron rod can rotate in the feeding box under the drive of the driving motor.

[0006] The utility model arranges a rotatable iron rod in the feed box and arranges a first electromagnet inside the iron rod, so that the magnetic impurities in the raw material are adsorbed while the raw material is stirred. The iron rod can fully contact the raw material, and the impurities are removed more thoroughly, thereby reducing the scrap rate of plastic products and achieving high impurity removal efficiency. At the same time, by arranging a number of protrusions outside the iron rod, the surface area of ​​the iron rod can be increased, so that the iron rod can adsorb more magnetic impurities, further improving the adsorption effect.

[0007] Optionally, a power output end of the driving motor is connected to a turntable, and a plurality of iron rods are provided on the turntable, one end of the iron rod is connected to the turntable, and the other end extends toward an inner wall of a feed box away from the turntable.

[0008] Optionally, a plurality of the iron rods are arranged near the outer edge of the turntable, a stirring rod is arranged between the plurality of iron rods, and a plurality of stirring blades are arranged on the stirring rod.

[0009] Optionally, stirring blades are respectively arranged on the upper and lower sides of the stirring rod, and the stirring blades on the upper and lower sides are staggered.

[0010] Optionally, the iron rod is connected to the turntable via an L-shaped connecting block, one end of the L-shaped connecting block is connected to the turntable, the other end faces the outside of the turntable, and the end facing the outside of the turntable is connected to the iron rod.

[0011] Optionally, a heating groove is provided on the inner wall of the feed box, and an electric heating wire is provided in the heating groove.

[0012] Optionally, the outer walls of the stirring rod and the stirring blades are provided with a high temperature protection layer.

[0013] Optionally, a cooling cavity is provided outside the cavity of the iron rod, and a cooling medium or a refrigeration plate is provided in the cooling cavity.

[0014] Optionally, a pretreatment structure connected to the feed box is arranged on the top of the feed box; the pretreatment structure includes: a box body, which is arranged on the top of the feed box and has a discharge port on the bottom; an iron shell, which is arranged at the bottom of the box body; the iron shell is inclined to the outside of the discharge port, and the side wall of the iron shell close to the inner side of the box body forms a slope for guiding materials; a second electromagnet is arranged in the iron shell.

[0015] Optionally, a baffle plate is slidably provided at the discharge port for sealing the discharge port.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model arranges a rotatable iron rod in the feed box and arranges a first electromagnet inside the iron rod, so that the magnetic impurities in the raw material are adsorbed while the raw material is stirred. The iron rod can fully contact the raw material, and the impurities are removed more thoroughly, thereby reducing the scrap rate of plastic products and achieving high impurity removal efficiency. At the same time, by arranging a number of protrusions outside the iron rod, the surface area of ​​the iron rod can be increased, so that the iron rod can adsorb more magnetic impurities, further improving the adsorption effect.

[0018] 2. By setting a heating device in the feed box, the blow molding raw material can be preheated to improve processing efficiency. The setting of the cooling cavity can prevent the external high temperature from entering the cavity and affecting the magnetic force of the first electromagnet.

[0019] 3. By setting a pretreatment structure on the top of the feed box, the raw materials are preliminarily cleaned of impurities by the second electromagnet of the pretreatment structure. The raw materials after the preliminary impurity removal are then fully cleaned by a number of iron rods, further making the metal impurities of the raw materials more thoroughly removed to ensure the quality of plastic products. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 The utility model is a schematic diagram of an embodiment of the structure.

[0022] Figure 2 It is a structural schematic diagram of the iron rod in the utility model.

[0023] Figure 3 This is a schematic diagram of the structure of Example 3.

[0024] Reference numerals:

[0025] 1. Feed box; 11. Feed port; 12. First discharge port; 13. Second discharge port;

[0026] 2. impurity removal structure; 21. iron rod; 211. cavity; 212. protrusion; 213. cooling cavity; 22. first electromagnet; 23. driving motor; 24. turntable; 25. stirring rod; 26. stirring blade; 27. L-shaped connecting block;

[0027] 3. Pretreatment structure; 31. Box body; 311. Feeding port; 32. Iron shell; 321. Slope; 33. Second electromagnet; 34. Baffle plate. DETAILED DESCRIPTION

[0028] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0029] In the description of the embodiments of the present utility model application, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "end", "side", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model application.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] In the embodiments of the present utility model application, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model application can be understood according to the specific circumstances.

[0032] In the embodiments of the utility model application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the utility model application. In order to simplify the disclosure of the embodiments of the utility model application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the utility model application. In addition, the embodiments of the utility model application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0034] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0035] Example 1

[0036] like Figure 1 and Figure 2 As shown, the embodiment of the utility model application provides a feed impurity removal device for a blow molding machine, including a feed box 1 and an impurity removal structure 2.

[0037] A feed port 11 is disposed at the top of the feed box 1 , and a first discharge port 12 and a second discharge port 13 are disposed at the bottom of the feed box 1 . Electric control valves are installed on the first discharge port 12 and the second discharge port 13 .

[0038] The impurity removing structure 2 includes an iron rod 21 , a first electromagnet 22 and a driving motor 23 .

[0039] The iron rod 21 is rotatably arranged inside the feed box 1, and a cavity 211 is opened inside the iron rod 21, and a plurality of protrusions 212 are evenly distributed on the outer surface of the iron rod 21; the first electromagnet 22 is arranged in the cavity 211; the driving motor 23 is installed on the outer wall of the feed box 1, and the power output end of the driving motor 23 is drivingly connected to the iron rod 21 in the feed box 1. The iron rod 21 can rotate in the feed box 1 under the drive of the driving motor 23, and the material is stirred during the rotation, and the magnetic impurities in the material are adsorbed synchronously, so that the impurity removal efficiency is high and more thorough; at the same time, by arranging a plurality of protrusions 212 outside the iron rod 21, the surface area of ​​the iron rod can be increased, more magnetic impurities can be adsorbed, and the adsorption effect can be further improved.

[0040] Optionally, a turntable 24 is connected to the power output end of the driving motor 23, and the turntable 24 is rotatably arranged inside the feed box 1, and the turntable 24 is arranged close to the inner wall of one side of the feed box 1, and a plurality of iron rods 21 are arranged on the turntable 24 away from the driving motor 23, one end of the iron rod 21 is connected to the turntable 24, and the other end extends toward the inner wall of the feed box 1 away from the turntable 24. The turntable 24 drives the plurality of iron rods 21 to rotate, which is conducive to improving the stirring effect of the iron rods 21 on the material, thereby improving the impurity adsorption effect.

[0041] Optionally, there are at least two iron rods 21. When there are two of the iron rods 21, they are symmetrically arranged on the turntable 24. When there are three, four, ... iron rods 21, multiple iron rods are distributed in a ring shape at equal intervals on the turntable 24.

[0042] Optionally, multiple iron rods 21 are arranged near the outer edge of the turntable 24, and stirring rods 25 are arranged between the multiple iron rods 21. The stirring rods 25 are provided with a plurality of stirring blades 26. By arranging stirring rods inside the multiple iron rods 21, it is beneficial to improve the stirring effect, so that the iron rods can fully remove metal impurities in the raw materials, improve the quality of the raw materials, and further improve the quality of the blow molding.

[0043] Optionally, stirring blades 26 are respectively provided on the upper and lower sides of the stirring rod 25, and the stirring blades on the upper and lower sides are staggered.

[0044] Optionally, there are two stirring rods 25 , both of which are arranged on the inner side of the iron rod 21 , and adjacent stirring blades on the two stirring rods 25 are arranged in a staggered manner.

[0045] Optionally, the iron rod 21 is connected to the turntable 24 via an L-shaped connecting block 27 , one end of the L-shaped connecting block 27 is connected to the turntable 24 , the other end faces the outside of the turntable 24 , and the end facing the outside of the turntable 24 is connected to the iron rod 21 .

[0046] When in use, the blow molding raw material is put into the feed box 1 through the feed port 11, the first electromagnet 22 is energized, and then the drive motor 23 is started. The drive motor 23 drives the iron rod 21 and the stirring rod 25 to rotate. During the rotation process, the iron rod 21 removes impurities from the raw material in the feed box 1, that is, the iron rod 21 adsorbs the metal impurities in the raw material. After removing impurities for a certain period of time, the electric control valve on the first discharge port 12 is opened, and the raw material is transported to the inside of the blow molding mold for processing and manufacturing. After the raw material in the feed box 1 is output, the first electromagnet 22 is powered off, the iron rod 21 loses its magnetism, thereby losing its adsorption force on the metal impurities, and then the electromagnetic valve on the second discharge port 13 is opened, and the metal impurities are discharged through the second discharge port 13.

[0047] Example 2

[0048] On the basis of Example 1, a heating device is provided in the feed box 1, and the heating device preheats the raw materials in the feed box 1. After preheating, the raw materials themselves have a certain temperature, which can save the heating time of the raw materials in the heating zone of the blow molding machine and improve the processing efficiency.

[0049] Optionally, the heating device uses an electric heating wire, a heating groove is provided on the inner wall of the feed box 1, and the electric heating wire is arranged in the heating groove.

[0050] Optionally, the outer walls of the stirring rod 25 and the stirring blade 26 are provided with a high temperature protection layer, and the protection layer can prevent the stirring rod 25 and the stirring blade 26 from being damaged by the high temperature environment.

[0051] Optionally, the iron rod 21 includes a cavity 211 for placing the first electromagnet 22, and a cooling cavity 213 is arranged outside the cavity 211. The cooling cavity 213 can contain a cooling medium, and a cooling plate can also be arranged. The cooling medium or the cooling plate can prevent external high temperature from entering the cavity 211 and affecting the magnetic force of the first electromagnet 22.

[0052] Example 3

[0053] On the basis of Example 1 or Example 2, in order to further improve the impurity removal effect, as Figure 3 As shown, a pretreatment structure 3 connected to the feed box 1 is arranged on the top of the feed box 1 .

[0054] The pre-processing structure 3 includes a box 31 , an iron shell 32 and a second electromagnet 33 .

[0055] The box body 31 is arranged at the top of the feed box 1, and a feed opening 311 is arranged at the bottom thereof, and the feed opening 311 is connected to the feed opening of the feed box 1. A box cover is movably arranged at the top of the box body 31, and of course the box body 31 can also be an open structure. The iron shell 32 is arranged at the bottom of the box body 31, and the iron shell 32 is inclined to the outside of the feed opening 311. The iron shell 32 is inclined from top to bottom, and the lower end is close to the outer edge of the feed opening 311, that is: the side wall of the iron shell 32 located on the inner side of the box body 31 forms a slope 321 that can guide the material. The second electromagnet 33 is arranged inside the iron shell 32.

[0056] In one embodiment, a blocking plate 34 is slidably provided at the material discharge port 311 for blocking the material discharge port 311. The blocking plate 34 can adjust the opening of the material discharge port 311 and is convenient to use.

[0057] A method for using a blow molding machine feed impurity removal device: the pre-weighed plastic granule raw material is put into the box body 31, the second electromagnet 33 is energized, the iron shell 32 adsorbs the impurities in the raw material, the raw material after preliminary impurity removal enters the feed box 1 through the discharge port 311, and then the first electromagnet 22 is energized, and the iron rod 21 removes impurities from the raw material in the feed box 1. After the impurity removal is completed, the raw material is transported to the heating area of ​​the blow molding machine through the first discharge port 12, the raw material is heated to the melting temperature, and the molten plastic is sent into the mold through high-pressure air for blow molding. After the raw material in the feed box 1 is output, the first electromagnet 22 and the second electromagnet 33 are de-energized, the iron rod 21 and the iron shell 32 lose the adsorption force on the metal impurities, and the impurities are discharged through the second discharge port 13. In another method of use, liquid plastic can also be placed in the box body 31.

[0058] Parts not described in detail in this embodiment are well-known techniques in the art.

[0059] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A blow molding machine feed impurity removal device, characterized in that: include: A feed box (1) is provided with a feed inlet (11) at the top, and a first discharge port (12) and a second discharge port (13) at the bottom, wherein the first discharge port (12) and the second discharge port (13) are both installed with electric control valves; The impurity removal structure (2) includes: An iron rod (21) is arranged in the feed box (1); The iron rod (21) has a cavity (211) inside and a plurality of protrusions (212) on its outer wall; A first electromagnet (22) is disposed in the cavity (211); A driving motor (23) is mounted on the feed box (1) and is drivingly connected to the iron rod (21). The iron rod (21) can rotate in the feed box (1) driven by the driving motor (23).

2. The blow molding machine feed impurity removal device according to claim 1, characterized in that: The power output end of the driving motor (23) is connected to a turntable (24), and a plurality of iron rods (21) are arranged on the turntable (24). One end of the iron rod (21) is connected to the turntable (24), and the other end extends toward the inner wall of the feed box (1) away from the turntable (24).

3. The blow molding machine feed impurity removal device according to claim 2, characterized in that: The plurality of iron rods (21) are arranged close to the outer edge of the rotating disk (24), a stirring rod (25) is arranged between the plurality of iron rods (21), and a plurality of stirring blades (26) are arranged on the stirring rod (25).

4. The blow molding machine feed impurity removal device according to claim 3, characterized in that: The stirring rod (25) is provided with stirring blades (26) on the upper and lower sides respectively, and the stirring blades (26) on the upper and lower sides are arranged in a staggered manner.

5. The blow molding machine feed impurity removal device according to claim 3, characterized in that: The iron rod (21) is connected to the turntable (24) via an L-shaped connection block (27); one end of the L-shaped connection block (27) is connected to the turntable (24), the other end faces the outside of the turntable (24), and the end facing the outside of the turntable (24) is connected to the iron rod (21).

6. The blow molding machine feed impurity removal device according to claim 3, characterized in that: The inner wall of the feed box (1) is provided with a heating groove, and an electric heating wire is provided in the heating groove.

7. The blow molding machine feed impurity removal device according to claim 6, characterized in that: The outer walls of the stirring rod (25) and the stirring blade (26) are provided with a high temperature protection layer.

8. The blow molding machine feed impurity removal device according to claim 6, characterized in that: A cooling cavity (213) is provided outside the cavity (211) of the iron rod (21), and a cooling medium is provided in the cooling cavity (213).

9. The blow molding machine feed impurity removal device according to any one of claims 1 to 8, characterized in that: A pretreatment structure (3) connected to the feed box (1) is arranged on the top of the feed box (1); the pretreatment structure (3) comprises: A box body (31) is arranged on the top of the feed box (1), and a feed outlet (311) is provided at the bottom of the feed box (1); An iron shell (32) is arranged at the bottom of the box body (31); The iron shell (32) is arranged obliquely outside the material discharge port (311), and a slope (321) capable of guiding materials is formed on a side wall of the iron shell (32) close to the inner side of the box body (31); The second electromagnet (33) is arranged in the iron housing (32).

10. The blow molding machine feed impurity removal device according to claim 9, characterized in that: A material blocking plate (34) is slidably provided at the material discharge opening (311) for blocking the material discharge opening (311).

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