A pressurized feeding device for supplying a foam particle to a mold cavity

Abstract

The application provides a pressurized feeding device for supplying foam particles to a mold cavity, comprising a conveying tank and a pressurizing assembly for controlling the conveying tank to be in a first set state and a second set state; the conveying tank comprises a lower tank body and an upper tank body; an impact plate is spirally arranged in the inside of the upper tank body towards the lower tank body; a wind disc assembly is assembled on the top of the upper tank body; the wind disc assembly is provided with a spiral air channel in the same spiral direction as the impact plate; the pressurizing assembly comprises independently distributed high-pressure chambers and negative pressure chambers; the high-pressure chambers are connected with the wind disc assembly through first pipelines; and the negative pressure chambers are connected with the lower tank body through second pipelines. In the application, the conveying tank is provided to realize the quantification of the supply of foam particles to the inside of the mold cavity; when the foam particles enter the inside of the conveying tank, the foam particles are fully dispersed through the impact plate and are assisted to be conveyed to the mold cavity in a high-pressure state, so that the filling compactness in the mold cavity is ensured, the production efficiency is accelerated, and the qualified rate of finished products is improved.

Description

Technical Field

[0001] This application relates to the field of foam plastic processing technology, and in particular to a pressurized feeding device for supplying foam particles to a mold cavity. Background Technology

[0002] Foamed plastics, also known as expanded polystyrene, are lightweight, porous materials made from plastic resins. Their unique characteristic lies in their numerous tiny pores, which give them significant advantages in terms of low weight, thermal insulation, sound insulation, and cushioning properties. The properties of foamed plastics include lightweight, low cost, ease of processing, and excellent insulation performance. Therefore, foamed plastics are widely used in various fields.

[0003] After curing, foam granules are screened and then placed into a mold cavity for heating and pressurization to form foam products. However, in the production process of plastic foam products, a conveying device is needed to transport and transfer the plastic foam granules and fill them into the mold cavity in a high-density manner. The filling density of the foam granules in the mold cavity determines the finished product qualification rate. Existing conveying methods use mechanical or gas conveying. When using mechanical contact conveying, the foam granules are easily broken, affecting the overall finished product quality. When using gas conveying alone, the conveying gas pressure is often unstable, making the conveying volume uncontrollable. This does not fully guarantee the tightness and uniformity of the filling in the mold cavity, resulting in a significant decrease in the yield rate and greatly affecting production efficiency. Summary of the Invention

[0004] This application provides a pressurized feeding device for supplying foam particles to a mold cavity. Through gas conversion, it enables rapid feeding and delivery, ensuring the tight filling of the mold cavity.

[0005] This application provides a pressurized feeding device for supplying foam particles to a mold cavity, comprising a conveying tank and a pressurizing assembly for controlling the conveying tank to be in a first set state and a second set state. The conveying tank includes a lower tank and an upper tank. An impact plate is spirally arranged inside the upper tank facing the lower tank. A fan assembly is mounted on the top of the upper tank, and the fan assembly has a spiral air duct in the same spiral direction as the impact plate. The pressurizing assembly includes independently distributed high-pressure chambers and negative-pressure chambers. The high-pressure chamber is connected to the fan assembly via a first pipe, and the negative-pressure chamber is connected to the lower tank via a second pipe. When the pressurizing assembly controls the conveying tank to be in the first set state, the high-pressure chamber and the negative-pressure chamber synchronously deliver gas, forming a high-velocity gas circulation inside the conveying tank. When the pressurizing assembly controls the conveying tank to be in the second set state, the high-pressure chamber independently delivers high-pressure gas, increasing the internal air pressure of the conveying tank.

[0006] In this application, based on the gas conveying method, a conveying tank is set up to ensure stable gas pressure and controllable raw material conveying volume, thereby realizing quantitative supply of foam particles inside the mold cavity. When the foam particles enter the conveying tank, they are fully dispersed by the impact plate and conveyed to the mold cavity under high pressure to ensure the tightness of filling in the mold cavity, accelerate production efficiency, and improve the finished product qualification rate.

[0007] In one specific implementation, the fan coil assembly is connected to a cover, and the cover is connected to a feed pipe, on which a first switching valve is installed.

[0008] In one specific implementation scheme, the fan coil unit is provided with a feed inlet adapted to the feed pipeline.

[0009] In one specific implementation, the spiral duct is disposed below the fan assembly and faces the impact plate.

[0010] In one specific implementation, the bottom of the lower tank is connected to a discharge pipe, and a second switching valve is installed on the discharge pipe.

[0011] In one specific implementation, when the conveying tank is in the first set state, the first switch valve is in the open state and the second switch valve is in the closed state. When the delivery tank is in the second set state, the second switch valve is in the open state, and the first switch valve is in the closed state.

[0012] In one specific feasible implementation, a control valve is installed on the second pipeline.

[0013] In one specific implementation, the bottom of the delivery tank is fitted with support legs. Attached Figure Description

[0014] Figure 1 A schematic diagram of the structure of a pressurized feeding device for supplying foam particles to a mold cavity, provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the fan coil unit provided in the embodiments of this application.

[0015] Icon labels: Lower tank body-10, support leg-11, upper tank body-20, impact plate-21, fan coil assembly-22, feed inlet-23, cover-24, spiral air duct-25, feed pipe-30, first switch valve-31, discharge pipe-40, second switch valve-41, high pressure chamber-50, first pipe-51, negative pressure chamber-60, second pipe-61, control valve-62. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0017] It should be noted that, unless otherwise defined, the technical or scientific terms used in one or more embodiments of this specification should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar words used in one or more embodiments of this specification do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0018] To facilitate understanding of the pressurized feeding device for supplying foam particles to a mold cavity provided in this application embodiment, its application scenario is first explained. After curing, foam particles are screened and then heated and pressurized into a mold cavity to form foam products. However, in the production process of plastic foam products, a conveying device is needed to transport and transfer the plastic foam particles, and to fill them into the mold cavity in a high-density manner. The filling density of the foam particles in the mold cavity determines the finished product qualification rate. Existing conveying methods use mechanical conveying or gas conveying. When using mechanical contact conveying, it is easy to cause the foam particles to break, affecting the overall finished product effect. When using gas conveying alone, the conveying gas pressure is often unstable, making the conveying volume uncontrollable, and the filling tightness and uniformity of the mold cavity cannot be fully guaranteed, resulting in a significant decrease in the yield and a great impact on production efficiency. In view of this, this application provides a pressurized feeding device for supplying foam particles to a mold cavity, which achieves rapid completion of feeding and delivery through gas conversion, ensuring the filling tightness of the mold cavity.

[0019] refer to Figure 1The pressurized feeding device for supplying foam particles to the mold cavity provided in this application includes a conveying tank. The conveying tank in this application is connected between the curing chamber and the molding die. The conveying tank has the accuracy of quantitative conveying. By conveying the required amount of foam particles to the mold cavity at high speed to the conveying tank, and fully filling multiple mold cavities by pressurization, a complete set of circulating feeding and discharging processes is formed. The conveying tank in this application can be used as an independent conveying unit or an auxiliary suction device to complete the auxiliary facility for stabilizing air pressure. Under the premise of quantitative conveying and ensuring stable conveying air pressure, the finished product qualification rate is greatly improved.

[0020] First, the conveying tank of this application adopts a split tank body, which includes a lower tank body 10 and an upper tank body 20. The bottom of the conveying tank is equipped with a support leg 11, which supports the bottom of the lower tank body 10. The upper tank body 20 is used to impact and disperse the foam particles after they enter, so as to avoid the small amount of agglomeration that is not screened out during the curing process. The interior of the upper tank body 20 is spirally arranged with an impact plate 21 facing the lower tank body 10. Through the spiral impact plate 21, the foam particles enter the lower tank body 10 from the upper tank body 20 in a spiral flow manner. A certain amount of foam particles are impacted and dispersed again when passing through the spiral impact plate 21.

[0021] The upper tank 20 of this application is provided with a fan coil assembly 22 at its top. A feed inlet 23 is provided at the center of the fan coil assembly 22. A spiral air duct 25 with the same spiral direction as the impact plate 21 is provided at the lower part of the fan coil assembly 22, thereby forming a vacuum zone at the feed inlet 23, allowing foam particles to enter the upper tank 20 quickly. The fan coil assembly 22 is connected to a cover 24, and the cover 24 is connected to a feed pipe 30. A first switching valve 31 is installed on the feed pipe 30.

[0022] The upper tank 20's fan coil assembly 22 is connected to the high-pressure chamber 50 of the pressurization assembly. The high-pressure chamber 50 is connected to a high-pressure gas source. High-pressure gas is supplied to the fan coil assembly 22 through the first pipeline 51. The spiral air duct 25 of the fan coil assembly 22 forms a vortex rotation corresponding to the spirally arranged impact plate 21. The airflow is collected by the negative pressure chamber 60 connected to the lower tank 10, so that a complete set of high-speed material circulation components is formed inside the conveying tank. The foam particles fall along the impact plate 21 and fully contact the impact plate 21 during the falling process to achieve the purpose of dispersion.

[0023] Furthermore, the negative pressure chamber 60 in this application is connected to a vacuum pump, and the negative pressure chamber 60 is connected to the lower tank 10 through a second pipeline 61. A control valve 62 is installed on the second pipeline 61 to control the opening and closing of the second pipeline 61.

[0024] Combination Figure 2As shown, the spiral air duct 25 sprays gas at high speed, and the vacuum zone formed at the feed inlet 23 quickly absorbs the foam particles into the upper tank 20. After entering the upper tank 20, the foam particles fully contact and disperse with the impact plate 21. At this time, the negative pressure gas in the lower tank 10 is in the open state. The negative pressure gas absorbs the gas inside the conveying tank by the lower tank 10, so that the feeding process is completed quickly and the feeding time is saved.

[0025] In this application, the pressurizing component controls the conveying tank to be in a first set state and a second set state. Specifically, in the first set state, the pressurizing component rapidly conveys a fixed amount of foam particles into the conveying tank and disperses the foam particles during the conveying process. In this first state, the first switch valve 31 is in the open state, and the discharge pipe 40 of the lower tank 10 is in the closed state. Specifically, the bottom of the lower tank 10 is connected to the discharge pipe 40, and the discharge pipe 40 is equipped with a second switch valve 41. When the conveying tank is in the first set state, the first switch valve 31 is in the open state, and the second switch valve 41 is in the closed state; when the conveying tank is in the second set state, the second switch valve 41 is in the open state, and the first switch valve 31 is in the closed state.

[0026] As can be seen from the above structure, when high-velocity gas is input into the fan assembly 22 from the high-pressure chamber 50, a vacuum zone is formed at the feed inlet 23. When the first valve is open, the foam particles quickly enter the lower tank 10 from the upper tank 20 and are fully dispersed when the foam particles are in the upper tank 20, while ensuring high feeding efficiency.

[0027] Continue to refer to Figure 1 As shown, in order to ensure that the foam particles fully fill the mold cavity while completing the rapid feeding, this application uses a high-pressure chamber 50 to transport high-pressure gas to increase the internal pressure of the conveying tank. When the second switch valve 41 is open, the high-pressure gas inside the conveying tank impacts the foam particles and transports them to the mold cavity along the discharge pipeline 40.

[0028] Therefore, the pressurizing assembly consists of an independently distributed high-pressure chamber 50 and a negative-pressure chamber 60. The high-pressure chamber 50 is connected to the fan coil assembly 22 via a first pipe 51, and the negative-pressure chamber 60 is connected to the lower tank 10 via a second pipe 61. When the pressurizing assembly controls the delivery tank to be in the first set state, the high-pressure chamber 50 and the negative-pressure chamber 60 simultaneously deliver gas, forming a high-velocity gas circulation inside the delivery tank. When the pressurizing assembly controls the delivery tank to be in the second set state, the high-pressure chamber 50 independently delivers high-pressure gas, increasing the internal air pressure of the delivery tank. These two different operating states are achieved by controlling the gas conversion between the high-pressure chamber 50 and the negative-pressure chamber 60, providing strong adjustability and controllability, meeting the mold cavity filling requirements, and improving overall production efficiency and finished product qualification rate.

[0029] In this application, based on the gas conveying method, a conveying tank is set up to ensure stable gas pressure and controllable raw material conveying volume, thereby realizing quantitative supply of foam particles inside the mold cavity. When the foam particles enter the conveying tank, they are fully dispersed by the impact plate 21 and conveyed to the mold cavity under high pressure to ensure the tightness of filling in the mold cavity, speed up production efficiency, and improve the finished product qualification rate.

[0030] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the framework of this disclosure, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this specification, which are not provided in detail for the sake of brevity.

[0031] Additionally, to simplify the description and discussion, and to avoid obscuring one or more embodiments of this specification, well-known power / ground connections for other components may or may not be shown in the provided drawings. Furthermore, the apparatus may be illustrated in block diagram form to avoid obscuring one or more embodiments of this specification, and this also takes into account the fact that the details of implementation of these block diagram apparatuses are highly dependent on the platform on which one or more embodiments of this specification will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details have been set forth to describe exemplary embodiments of this disclosure, it will be apparent to those skilled in the art that one or more embodiments of this specification may be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0032] One or more embodiments of this specification are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments of this specification should be included within the scope of protection of this disclosure.

Claims

1. A pressurized feeding device for supplying foam particles to a mold cavity, characterized in that, include: A delivery tank, and a pressurization assembly for controlling the delivery tank to be in a first preset state and a second preset state; wherein, The conveying tank includes a lower tank body and an upper tank body; an impact plate is spirally arranged inside the upper tank body facing the lower tank body, and a fan plate assembly is assembled on the top of the upper tank body. The fan plate assembly is provided with a spiral air duct in the same spiral direction as the impact plate. The pressurization assembly includes an independently distributed high-pressure chamber and a negative-pressure chamber. The high-pressure chamber is connected to the fan coil assembly via a first pipeline, and the negative-pressure chamber is connected to the lower tank via a second pipeline. When the pressurization component controls the delivery tank to be in the first set state, the high-pressure chamber and the negative-pressure chamber simultaneously deliver gas, and a high-speed gas circulation is formed inside the delivery tank; When the pressurization component controls the delivery tank to be in the second set state, the high-pressure chamber independently delivers high-pressure gas, and the internal air pressure of the delivery tank increases.

2. The pressurized feeding device for supplying foam particles to a mold cavity according to claim 1, characterized in that, The fan coil unit is connected to a cover, and the cover is connected to a feed pipe, on which a first switching valve is installed.

3. The pressurized feeding device for supplying foam particles to a mold cavity according to claim 2, characterized in that, The fan assembly has a feed inlet adapted to the feed pipeline.

4. The pressurized feeding device for supplying foam particles to a mold cavity according to claim 3, characterized in that, The spiral air duct is located below the fan plate assembly and faces the impact plate.

5. The pressurized feeding device for supplying foam particles to a mold cavity according to claim 2, characterized in that, The bottom of the lower tank is connected to a discharge pipe, and a second switching valve is installed on the discharge pipe.

6. The pressurized feeding device for supplying foam particles to a mold cavity according to claim 5, characterized in that, When the conveying tank is in the first set state, the first switch valve is in the open state and the second switch valve is in the closed state; When the delivery tank is in the second set state, the second switch valve is in the open state, and the first switch valve is in the closed state.

7. The pressurized feeding device for supplying foam particles to a mold cavity according to claim 1, characterized in that, A control valve is installed on the second pipeline.

8. The pressurized feeding device for supplying foam particles to a mold cavity according to claim 1, characterized in that, The bottom of the conveying tank is equipped with support legs.

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