Mineralized product injection molding equipment for mold bag manufacturing

Abstract

The invention provides mineralized product injection molding equipment for mold bag manufacturing, and relates to the field of mold bag machining, the mineralized product injection molding equipment comprises a hopper and an injection molding machine charging barrel connected to a discharging pipe at the bottom of the hopper, a dust sprayer and an isolation bin used for containing plastic particles are installed on the inner side of the hopper, and a dust spraying opening of the dust sprayer faces the isolation bin. The heated mineralized product powder can be attached to the outer surfaces of the plastic particles in a scalding mode after being sprayed out of the ash spraying device, and the mineralized product and the plastic particles are evenly mixed in the mode that the heated mineralized product powder is attached to the plastic particles in a scalding mode. The traditional mixing mode that mineralized products and part of plastic particles are mixed, stirred, heated and extruded to be made into particles and then mixed with the remaining plastic particles is avoided, the mineralized products and the plastic particles can be directly and evenly mixed in the hopper, and the pre-operation of melting and mixing the mineralized products and the plastic particles is reduced; therefore, the waste of energy and manpower is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mold bag processing, in particular to a mineralized product injection molding equipment for mold bag manufacturing. BACKGROUND

[0002] The geotechnical mold bag is a continuous (or single) bag-shaped product made of a double-layer polymeric synthetic material. The concrete or cement mortar is poured into the mold bag through a high-pressure pump, and after the concrete or cement mortar is solidified, a plate-shaped structure or other structure with certain strength is formed, which is widely used in dam protection, revetment, harbor, wharf and other protection projects of rivers, lakes and seas.

[0003] After the mold bag is processed, a hard plastic part is used to shape and support the mold bag to prevent deformation and improve overall firmness. In order to reduce the material cost of the plastic part, recycled plastic particles, i.e. waste plastic, are cleaned, crushed and granulated to form. In order to ensure the stability of the geotechnical mold bag construction and the structural strength after use, the mineralized product is added to the plastic part, which can improve the tensile strength and surface hardness of the hard plastic part. At the same time, the recycling of plastic waste can further reduce production costs. In the prior art, when producing a hard plastic part, the mineralized product and a part of the plastic particles are first rapidly stirred and mixed, then sent to a double-screw extruder for melting and mixing, and then cut into particles to form a mineral-filled master batch. In subsequent production, the master batch and ordinary plastic particles are mixed according to a set proportion and then sent to an injection molding machine together. Although this method can uniformly mix the mineralized product in the plastic particles, the process is complicated and requires mixing, heating, fusion, extrusion, and finally cutting into particles for use. The pre-step is more and energy and manpower are wasted. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a mineralized product injection molding equipment for mold bag manufacturing. The heated mineralized product powder can be evenly attached to the plastic particles by heating the mineralized product powder. The mixing of the mineralized product and the plastic particles can be completed on the hopper of the injection molding machine, reducing the pre-operation of mixing the mineralized product and the plastic particles, and further reducing the waste of energy and manpower. The problems raised in the above background technology are solved.

[0005] To achieve the above object, the present application realizes the following technical scheme: a mineralized product injection molding equipment for mold bag manufacturing, comprising a hopper and an injection molding machine barrel connected to the hopper bottom discharge pipe, a spray ash device is installed on the inner side of the hopper, and a separation bin for containing plastic particles is installed. The spray ash port of the spray ash device faces the separation bin. When the equipment is running, the heated mineralized product powder can be attached to the outer surface of the plastic particles after being sprayed from the spray ash device.

[0006] As the mineralization product injection molding equipment for the mold bag production of the application is preferred, the spraying range of the ash sprayer covers the whole isolation bin, the isolation bin is a circular powder isolation screen plate, and the isolation bin can block the plastic particles from flowing out but cannot block the mineralization product powder from entering.

[0007] As the mineralization product injection molding equipment for the mold bag production of the application is preferred, the spraying port of the ash sprayer is a front straight and rear expanded horn-shaped spraying port.

[0008] As the mineralization product injection molding equipment for the mold bag production of the application is preferred, the circulating pipe capable of keeping the mineralization product powder circulating flow is connected to the hopper and the discharge pipe, the heating type screw conveyor capable of heating the mineralization product powder and the air blower capable of keeping the air of the circulating pipe rapidly flowing are connected to the circulating pipe, and the air outlet end of the circulating pipe is connected to the ash sprayer.

[0009] As the mineralization product injection molding equipment for the mold bag production of the application is preferred, the heating pipe capable of heating the mineralization product again is installed on the circulating pipe between the air blower and the ash sprayer.

[0010] As the mineralization product injection molding equipment for the mold bag production of the application is preferred, the electromagnetic switch valve is arranged on the discharge pipe, and the electromagnetic switch valve is arranged below the connecting end of the circulating pipe and the discharge pipe.

[0011] As the mineralization product injection molding equipment for the mold bag production of the application is preferred, the feeding end of the heating type screw conveyor is connected to the material bin, and the stirring frame capable of stirring the material is arranged in the hopper and the material bin.

[0012] As the mineralization product injection molding equipment for the mold bag production of the application is preferred, the adjustable screen plate capable of being opened and closed is arranged at the bottom of the isolation bin, and the adjustable screen plate is connected to the output shaft of the motor through the hinged seat.

[0013] As the mineralization product injection molding equipment for the mold bag production of the application is preferred, the outer wall of the ash sprayer is attached to the inner wall of the hopper, and the top end of the ash sprayer and the isolation bin is attached and fixed to the inner wall of the top of the hopper.

[0014] Compared with the prior art, the application has the following beneficial effects: the mineralization product and the waste plastic recycling particles are uniformly mixed by using the method of heating the mineralization product powder to adhere to the plastic particles, avoiding the traditional mixing method of mixing and stirring the mineralization product with part of the plastic particles, heating, and extruding to form particles, and then mixing with the remaining plastic particles, so that the mineralization product and the plastic particles can be directly and uniformly mixed in the hopper, reducing the pre-operation of melting and mixing the mineralization product and the plastic particles, and further reducing the waste of energy and manpower, and the utilization of recycled plastic further recycles plastic waste, saves cost and reduces pollution. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the hopper of the present invention; Figure 3 This is a schematic diagram showing the positions of the sprayer and isolation chamber of the present invention; Figure 4 This is a cross-sectional view of the spray nozzle of the present invention; Figure 5 This is a bottom view of the isolation chamber of the present invention; Figure 6 For the present invention Figure 4 A magnified view of a portion of area A in the middle.

[0016] The components include: 1. Hopper; 2. Discharge pipe; 3. Material cylinder; 4. Ash sprayer; 5. Isolation chamber; 6. Ash spray nozzle; 7. Circulation pipe; 8. Heated screw conveyor; 9. Blower; 10. Heating pipe; 11. Electromagnetic switch valve; 12. Material bin; 13. Mixing rack; 14. Adjusting screen plate. Detailed Implementation

[0017] like Figures 1-6 As shown, the injection molding equipment for making plastic bags includes a hopper 1 and an injection molding machine barrel 3 connected to the discharge pipe 2 at the bottom of the hopper 1. A spray nozzle 4 and an isolation chamber 5 for holding plastic particles are installed inside the hopper 1. The spray nozzle 6 of the spray nozzle 4 faces the isolation chamber 5. When the equipment is running, the heated mineral powder is sprayed from the spray nozzle 4 and can adhere to the outer surface of the plastic particles.

[0018] Geotextile bags are continuous (or individual) bag-shaped products made of a double-layer polymerized synthetic fiber material. Concrete or cement mortar is poured into the geotextile bag using a high-pressure pump. After the concrete or cement mortar solidifies, it forms a plate-like structure or other structure with a certain strength. They are widely used in protection projects such as damming, slope protection, bank protection, harbors, and wharves in rivers, lakes, and seas.

[0019] The hard plastic part is used to shape and support the mold bag during use after the mold bag processing to prevent deformation of the mold bag and improve the overall firmness. In order to reduce the material cost of the plastic part, recycled plastic particles (i.e. waste plastic) are usually cleaned, crushed and granulated to make the plastic part. In order to ensure the stability of the earthwork mold bag construction and the structural strength after use, the addition of mineralized products in the plastic part can improve the tensile strength and surface hardness of the hard plastic part, while further reducing the production cost. In the prior art, the mineralized product and a part of the plastic particles are first rapidly stirred and mixed, then sent to a double screw extruder for melting and mixing, and then cut into particles to make a mineral filled master batch. In subsequent production, the master batch and ordinary plastic particles are mixed according to the set proportion and then sent to an injection molding machine together. Although this method can uniformly mix the mineralized product in the plastic particles, the process is complicated and requires mixing, heating, fusion, extrusion, and finally cutting into particles for use. The pre-step is more and energy and manpower are wasted. In the present scheme, when the mineralized product and the plastic particles are mixed, the mineralized product is first heated to a temperature that can scald the plastic particles. When the mineralized product powder is sprayed out of the isolation bin 5 through the ash sprayer 4, the heated powder can be scalded on the surface of the plastic particles by its own temperature. After the mineralized product is fully scalded on the surface of the plastic particles, the plastic particles and the mineralized product powder are uniformly mixed. Compared with the traditional method of melting and mixing plastic particles and mineralized product to produce a master batch, the present scheme can directly mix the mineralized product with the plastic particles in the hopper 1 without pre-processing the master batch. This not only ensures uniform mixing of the mineralized product and the plastic particles, but also reduces the mixing steps of the mineralized product and the plastic particles, thereby reducing energy and manpower waste.

[0020] Further, In an optional embodiment, the ash spraying range of the ash sprayer 4 covers the entire isolation bin 5, and the isolation bin 5 is a circular powder isolation screen plate that can block the flow of plastic particles but cannot block the entry of mineralized product powder.

[0021] In the present embodiment, the isolation bin 5 is a circular powder isolation screen plate, which facilitates stirring of the plastic particles in the isolation bin 5. The ash sprayer 4 sprays ash that covers the entire isolation bin 5, so that the ash sprayed by the ash sprayer 4 has a large contact area with the isolation bin 5, thereby facilitating the contact and scalding of the powder and the plastic particles. The isolation bin 5 can block the flow of plastic particles without blocking the mineralized product powder, so the mineralized product powder can freely enter and exit the isolation bin 5. If a small amount of mineralized product powder entering the isolation bin 5 fails to scald on the plastic particles, these mineralized product powders will also fall from the isolation bin 5 during the stirring of the plastic particles, and will not accumulate in the isolation bin 5.

[0022] In an alternative embodiment, the spray port 6 of the spray device 4 is a front straight and rear expanding horn-shaped port.

[0023] In this embodiment, the spray port 6 of the spray device 4 is set as a front straight and rear expanding horn-shaped port. When the powder is sprayed from the spray port 6, the gradually expanding horn-shaped section changes the powder carried by the airflow from concentrated spraying to spreading in all directions, avoiding the small coverage of concentrated spraying and the invalid heating of the heated powder due to the excessive powder impacting on the small area of the isolation bin 5, and reducing the waste of the heated powder.

[0024] In an alternative embodiment, the hopper 1 and the discharge pipe 2 are connected with a circulating pipe 7 capable of keeping the mineralized product powder circulating, the circulating pipe 7 is connected with a heating type screw conveyor 8 capable of heating the mineralized product powder and a air blower 9 capable of keeping the air of the circulating pipe 7 flowing quickly, and the air outlet end of the circulating pipe 7 is connected with the spray device 4.

[0025] In this embodiment, after the ash sprayer 4 sprays, a small part of the mineralized product powder inevitably cannot be attached to the plastic particles, and these powders can enter the circulating pipe 7 through the negative pressure generated by the air blower 9 when the air is blown, so as to be sprayed again to the isolation bin 5, avoiding the accumulation of powder in the discharge pipe 2 below the hopper 1, without adding new mineralized product powder supplement, which is beneficial to control the addition ratio of mineralized product powder and plastic particles; It should be noted that when the mineralized product powder is sprayed to the isolation bin 5 in the initial stage, only the mineralized product powder in the device has a relatively high temperature, the air blown to the hopper 1 and the temperature of the hopper 1 and the plastic particles are all normal temperature, which can avoid the heating of the plastic particles to cause the plastic particles to be slightly fused and cause adhesion, and the heating type screw conveyor 8 is slowly added to the circulating pipe 7 when heating and conveying the mineralized product powder, rather than quickly and massively added to the circulating pipe 7, if it is quickly and massively added, the powder sprayed by the ash sprayer 4 is more in unit time, and a large amount of powder will be sprayed to the plastic particles in the same area at the same time, these plastic particles will receive more powder on the surface in a short time, but if the powder is accumulated, it will not be able to fully contact the plastic particles in the isolation bin 5, so that the heated powder collides with the plastic particles covered with powder and falls down, causing waste, and a large amount of powder deposited in the discharge pipe 2 is not easy to be wrapped by the air flowing in the hopper 1, affecting the normal operation of the device, at the same time, since the hopper 1 and the circulating pipe 7 are relatively sealed environments, if it is quickly and massively added, the high-temperature powder will quickly heat the air in the hopper 1, which is easy to cause the plastic particles in the isolation bin 5 to melt, when the slowly added heated mineralized product powder, the high-temperature powder will enter the hopper 1 in a small flow and relatively dispersed state, and the air is in contact for a long time but relatively mild, these dispersed heat will be gradually taken away by the original air in the hopper 1, or conducted to the outside through the hopper 1 wall, it is difficult to form heat accumulation, and the air temperature rise will be greatly reduced, thereby avoiding the melting and adhesion of the plastic particles caused by the high-temperature heating of the mineralized product powder.

[0026] In an optional embodiment, a heating pipe 10 capable of heating the mineralized product again is installed on the circulating pipe 7 between the air blower 9 and the ash sprayer 4.

[0027] In this embodiment, a small amount of powder that is not attached to the plastic particles will be greatly reduced in temperature after flowing in the circulating pipe 7 for several times, until the temperature is reduced to a level that is unable to attach to the plastic particles. The heating pipe 10 can heat the powder again to increase the temperature of the powder, and maintain the effect of the powder attaching to the plastic particles. It should be noted that the heating temperature of the mineralized product powder in the heating screw conveyor 8 is higher than the heating temperature of the mineralized product powder in the heating pipe 10. During the process of the mineralized product powder being conveyed by the heating screw conveyor 8, the mineralized product powder does not need to be heated by the heating pipe 10. Because the surface area of the plastic particles that can be attached by the powder is large in the initial stage, the amount of powder that falls off the plastic particles is small in the initial stage. During the process of the powder circulating, if the temperature of the powder is not reduced to a level that is unable to attach to the plastic particles, the powder will be sprayed on the plastic particles again by the ash sprayer 4 after circulating in the circulating pipe 7. When the material in the heating screw conveyor 8 is completely discharged, the temperature of the powder that falls off the plastic particles will be reduced after circulating for several times. If there is no heating source, the temperature of the powder will be reduced to a level that is unable to attach to the plastic particles after a certain period of time. At this time, the heating pipe 10 is started to heat the powder. It should be noted that the heating temperature of the mineralized product powder in the heating pipe 10 only needs to be higher than the critical temperature at which the plastic particles are slightly softened or fused. At this temperature, the mineralized product can be effectively attached to the plastic particles, and the plastic particles are only slightly softened or fused, and most of the surface of the plastic particles is already wrapped by the mineralized product. Even if the plastic particles are slightly softened or fused, it is difficult for them to stick to each other.

[0028] In an optional embodiment, the discharge pipe 2 is provided with an electromagnetic switch valve 11, which is arranged below the connection end of the circulating pipe 7 and the discharge pipe 2.

[0029] In this embodiment, the electromagnetic switch valve 11 can close the discharge pipe 2 to prevent the falling powder from entering the barrel 3 through the discharge pipe 2. The position of the electromagnetic switch valve 11 needs to be close to the circulating pipe 7 and the discharge pipe 2. In this way, if some powder is accumulated outside the electromagnetic switch valve 11, the height of the bottom of the circulating pipe 7 from the outside of the valve of the electromagnetic switch valve 11 is low, and the wind flowing rapidly in the hopper 12 is more likely to wrap and guide these powders into the circulating pipe 7 for circulation.

[0030] In an optional embodiment, the feeding end of the heating screw conveyor 8 is connected with a hopper 12, and the hopper 1 and the hopper 12 are both provided with a stirring frame 13 that can stir the material.

[0031] In the embodiment, the stirring frame 13 arranged in the hopper 12 can stir the mineralized product powder, avoid the powder from being blocked in the hopper 12, and make the powder be guided to the heating type screw conveyor 8 smoothly. The stirring frame 13 arranged in the hopper 1 can stir the plastic particles in the isolation bin 5, so that the plastic particles are always in a moving state. Under the condition of rapid stirring, the plastic particles in the isolation bin 5 can be moved to the edge of the bin wall of the isolation bin 5 to contact the mineralized product powder, so that each plastic particle can be fully attached by the mineralized product.

[0032] In an optional embodiment, the bottom of the isolation bin 5 is provided with an adjustable sieve plate 14 which can be opened and closed. The adjustable sieve plate 14 is connected through a hinge seat and an output shaft of a motor.

[0033] In the embodiment, after the powder and the plastic particles are attached and mixed, the motor can drive the adjustable sieve plate 14 to be opened. During the stirring process of the stirring frame 13, the plastic particles in the isolation bin 5 can be guided out completely.

[0034] In an optional embodiment, the outer side wall of the ash sprayer 4 is attached to the inner wall of the hopper 1. The top end of the ash sprayer 4 and the isolation bin 5 is attached to and fixed with the inner wall of the top of the hopper 1.

[0035] In the embodiment, the outer side wall and the top end of the ash sprayer 4 and the top end of the isolation bin 5 are attached to the inner wall of the hopper 1. In this state, the dead angle in the hopper 1 can be reduced effectively, and the powder can be accumulated at the top end of the ash sprayer 4 and the isolation bin 5 when the powder floats or flows in the hopper 1, so that the fallen powder can be fully recycled.

[0036] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A mineral product injection molding apparatus for making molded bags, comprising a hopper (1) and an injection molding machine barrel (3) connected to a discharge pipe (2) at the bottom of the hopper (1), characterized in that: The hopper (1) is equipped with a sprayer (4) and an isolation chamber (5) for holding plastic particles. The spray nozzle (6) of the sprayer (4) faces the isolation chamber (5). When the equipment is running, the heated mineralized product powder is sprayed from the sprayer (4) and can adhere to the outer surface of the plastic particles.

2. The injection molding equipment for mineralized products used in mold bag production according to claim 1, characterized in that: The spraying range of the sprayer (4) covers the entire isolation chamber (5). The isolation chamber (5) is a circular powder isolation screen plate. The isolation chamber (5) can block the plastic particles from flowing out but cannot block the mineralized product powder from entering.

3. The injection molding equipment for mineralized products used in mold bag production according to claim 2, characterized in that: The nozzle (6) of the sprayer (4) is a trumpet-shaped nozzle that is straight at the front and expands at the back.

4. The injection molding equipment for mineralized products used in mold bag production according to claim 1, characterized in that: The hopper (1) and the discharge pipe (2) are connected to a circulation pipe (7) that can keep the mineralized product powder circulating. The circulation pipe (7) is connected to a heated screw conveyor (8) that can heat the mineralized product powder and a blower (9) that keeps the air in the circulation pipe (7) flowing rapidly. The air outlet of the circulation pipe (7) is connected to the dust sprayer (4).

5. The injection molding equipment for mineralized products used in mold bag production according to claim 4, characterized in that: A heating pipe (10) capable of reheating the mineralized product is installed on the circulation pipe (7) between the blower (9) and the ash sprayer (4).

6. The injection molding equipment for mineralized products used in mold bag production according to claim 1, characterized in that: An electromagnetic switch valve (11) is installed on the discharge pipe (2). The electromagnetic switch valve (11) is located below the connection end between the circulation pipe (7) and the discharge pipe (2).

7. The injection molding equipment for mineralized products used in mold bag production according to claim 4, characterized in that: The feed end of the heated screw conveyor (8) is connected to a hopper (12), and both the hopper (1) and the hopper (12) are equipped with a stirring rack (13) that can stir the material.

8. The injection molding equipment for mineralized products used in molded bag production according to claim 1, characterized in that: The bottom of the isolation chamber (5) is equipped with an adjustable screen plate (14) that can be opened and closed. The adjustable screen plate (14) is connected to the output shaft of the motor through a hinge seat.

9. The injection molding equipment for producing mineralized products for molded bags according to claim 1 or 2, characterized in that: The outer wall of the sprayer (4) is attached to the inner wall of the hopper (1), and the top of the sprayer (4) and the isolation chamber (5) are attached to the inner wall of the top of the hopper (1).

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