TWI821696B - A foam injecting and mixing device - Google Patents

Abstract

A foam injecting and mixing device includes a mixing assembly, an injecting assembly connected to the mixing assembly, and a controller adapted to control the mixing assembly and the injecting assembly respectively. The mixing assembly includes a material outputting unit, a foaming agent outputting unit, and a stirring tank. The material outputting unit includes a tank body with a room filled with polymer materials and a propelling unit adapted to output the polymer materials of the room by a linear reciprocating motion. Thus, after the polymer materials fill the room, the moving speed of the propelling unit can be controlled to allow the polymer materials to execute a stable mixing operation and output the polymer materials more stably. Accordingly, the amount of the outputted polymer materials and the foaming agent outputted by the foaming agent outputting unit can be precisely controlled to attain a desirable mixing proportion. Therefore, the stability of a produced product is efficiently increased.

Description

Foam injection mixing device

The present invention relates to a mixing device, in particular to a foaming injection mixing device.

Foamed polymers have many advantages, such as high strength, low weight, impact resistance, thermal insulation, etc. Foaming agent products can be manufactured through injection molding machines or extrusion molding machines, such as combining polymer raw materials and foaming agents. After mixing to form a mixture, applying force or pressure to the mixture to eject or extrude the mixture into the cavity of the mold and allowing the mixture to foam and cool within the cavity to form a foamed article; however, In order to produce foaming agent products with stable quality, the output of the foaming agent storage tank, mixing tank, polymer introduction system, the polymer raw material or the foaming agent must be accurately controlled during the production process. If there are errors in control, it will lead to instability in the quality of the finished product during the molding process.

Referring to Figure 1, a conventional foaming injection mixing device 1 has a body 11, a mixing space 12 penetrating the body 11, a pushing vortex 13 extending in the mixing space 12 and having a plurality of pushing pieces 131, and a A raw material input device 14 is provided on the main body 11 and can input a raw material into the mixing space 12, and a foaming agent input device is provided on the main body 11 and can input a foaming agent into the mixing space 12. 15; Among them, the front end of the body 11 has an output port 111; therefore, during use, a raw material is first input into the mixing space 12 through the raw material input device 14, and when the pushing vortex 13 rotates, the pushing piece 131 Push the raw material to move toward the output port 111, and at the same time, the foaming agent input device 15 will input the foaming agent (such as gas) into the mixing space 12, so that the raw materials and foaming agent in the mixing space 12 will be in the mixing space 12. The pusher vortex 13 continues to push to mix it into a mixed material, and then the pusher vortex 13 continues to push the mixed material from the output port 111 into a mold 2, and then forms a mixture in the mold 2. A foam product.

However, after actual use, it was found that since the foaming agent and the raw material are mixed by pushing the pushing vortex 13, the mixing stability is not good. Furthermore, because the mixed material is The mixed material is pushed to the output port 111 through the pushing piece 131 on the pushing worm 13. There will be a gap between the pushing piece 131 and the pushing piece 131. Therefore, it must be carried out before each processing. The sample, that is, when the mixture is filled in the mixing space, it needs to be continuously rotated and extruded through the pusher vortex 13, and the mixture continues to be output from the output port 111. It must wait until the mixture in the mixing space 12 is dense. After that, normal processing can be carried out. Therefore, in addition to the sample before each processing, a lot of mixed materials will be consumed, causing waste; in addition, when the raw material is mixed with the foaming agent, it is pushed by the pushing vortex rod 13 When there is a gap between the sheets 131, it is difficult to accurately control the mixing ratio of the raw material and the foaming agent. The gap may easily cause the mixing effect to deteriorate, resulting in a gap in the mixing ratio, affecting the stability of the product molding, which needs to be improved.

Therefore, the object of the present invention is to provide a foaming injection mixing device that can achieve the effect of stabilizing the output of foaming agent.

Therefore, a foaming injection mixing device of the present invention includes a mixing group, an injection group connected to the mixing group, and a controller that controls the mixing group and the injection group respectively; wherein, the mixing group includes a high-output A raw material output device for molecular raw materials, a foaming agent output device that can output a foaming agent, and a mixing drum that can be connected to the raw material output device and the foaming agent output device respectively, and the aforementioned raw material output device has a filling device. There is a cylinder in the activity space of the polymer raw material, and an ejector that can reciprocate in a straight line in the movable space, and the ejector can reciprocate in a straight line to push the output of the polymer raw material in the movable space. Therefore, through the control The pushing speed of the pusher can stably control the mixing of the polymer material, so that the polymer material can be output more stably, and the controller can control the foaming agent output device to output the foaming agent. Dosage, so that the controlled dosage of the foaming agent complies with the set mixing ratio, and the output of the polymer raw material and foaming agent can be more accurately controlled to meet the required mixing ratio, thereby achieving stable mixing and effectively improving the stability of the produced product.

The aforementioned and other technical contents, features and effects of the present invention will be clearly understood in the following detailed description of the preferred embodiments with reference to the drawings.

Referring to Figure 2, a preferred embodiment of the foaming injection mixing device 3 of the present invention includes a mixing group 31, an injection group 32 connected to the mixing group 31, and a device that controls the mixing group 31 and injection respectively. Controller 33 of group 32; wherein, the mixing group 31 includes a raw material output device 311 that can output polymer raw materials, a foaming agent output device 312 that can output a foaming agent, and a raw material output device that can be connected to the raw material output device respectively. 311. The mixing drum 313 of the foaming agent output device 312.

Continuing with the above, the raw material output device 311 has a cylinder 3112 that can be filled with an movable space 3111 of a polymer raw material, and an ejector 3113 that can move linearly back and forth in the movable space 3111, and the ejector 3113 The polymer raw material output in the activity space 3111 can be pushed back and forth in a straight line; in addition, the foaming agent output device 312 has a storage barrel 3121 that can output a foaming agent, and an output unit 3122 that controls the output of the foaming agent; , the mixing drum 313 is connected to the output unit 3122 and the cylinder 3112, so that the foaming agent and the polymer raw material are input into the mixing drum 313 according to a mixing ratio to mix a mixture and then input it to the injection group 32 storage. In addition, in this embodiment, a gas diffuser 314 can be provided on the mixing drum 313, and the foaming agent first passes through the gas diffuser 314, and then is input to the mixing drum 313 and the polymer. The ingredients are mixed to increase the mixing effect.

Furthermore, the controller 33 is connected to the pusher 3113 and the output unit 3122 respectively, and controls the output unit 3122 to output the foamed material according to the dosage value of the polymer raw material filled in the cylinder 3112 and the mixing ratio. At the same time, in this embodiment, the injection group 32 has a storage cylinder 321 with a storage space 323, and a propelling member 322 that can reciprocate linearly in the storage cylinder 321 and is located in the storage space 323, and The pusher 322 can linearly reciprocate to push the mixed material in the storage space 323 and output it into the mold. At the same time, when the mixed material in the mixing drum 313 is input into the storage space 323, the mixed material will be prevented from foaming in advance. Therefore, through the pressurization of the propelling member 322, the pressure of the storage space 323 and the pressure of the mixing drum 313 can be made the same.

Referring to Figure 2, during operation, the raw material output device 311 is filled with the required dosage value of the polymer raw material, and then the polymer raw material is placed in the movable space 3111 according to the required mixing ratio and the pusher is set. After the pushing speed of the device 3113 is increased, when the polymer raw material starts to be supplied, the controller 33 will control the output unit 3122 to output the foaming agent to the mixing drum 313 based on the dosage value and the supply status of the mixing ratio. Internal mixing molding; during actual operation, for example, the dosage value of the polymer raw material is 200g, the mixing ratio is 0.7%, the dosage of the foaming agent is 1.4g (200g*0.7%), and the supply speed of the pusher 3113 is 20g /s, and when the controller 33 controls the ejector 3113 to start operating, the controller 33 will control the output unit 3122 to send a signal according to the dosage of the polymer raw material and the supply speed of the ejector 3113, that is, control the output unit 3122 synchronously outputs the foaming agent of 0.014g/s, so that the dosage control and output of the foaming agent can be effectively performed, ensuring that the dosage output of the foaming agent is synchronized with the dosage output of the polymer raw material; therefore, the controller 33 Based on the dosage value and the mixing ratio, the foaming agent output device 312 is then controlled to output the dosage of the foaming agent to ensure that the polymer raw material and foaming agent are stably output at the required mixing ratio, thereby improving production. product stability.

Continuing with the above, since the polymer raw material can be filled in the movable space 3111, by controlling the pushing speed of the pusher 3113, the mixing of the polymer raw material can be stably controlled, so that the polymer raw material can be mixed more stably. Carry out output, make up for it during the conversation, and then control the foaming agent to more accurately control the output of the polymer raw material and foaming agent to meet the required mixing ratio, thereby achieving stable mixing and effectively improving the production product. Stability; furthermore, the injection group 32 is designed through the storage cylinder 321 and a propelling member 322 that can reciprocate linearly in the storage cylinder 321 and is located in the storage space 323, and the mixture of the mixing drum 313 is It can be placed in the storage space 323, and through the squeezing force of the pusher 322, the mixture in the storage space 323 can be maintained at a certain pressure to prevent the mixture from foaming in advance, thus ensuring that the mixture can be stably Carry out output to stabilize the quality of subsequent foaming products.

To summarize the above, the foam injection mixing device of the present invention mainly uses the design of the mixing group, the injection group and the controller. After the polymer raw material can be filled in the active space, the polymer raw material can be filled into the active space by controlling the pushing speed of the pushing device. The polymer raw material can be stably controlled for mixing, so that the polymer raw material can be output more stably. Make up for it during the conversation, and then control the foaming agent to more accurately control the mixing of the polymer raw material and the foaming agent. The output of the foaming agent meets the required mixing ratio, thereby achieving stable mixing and effectively improving the stability of the produced product. In addition, the mixture can be placed in the storage space, and through the extrusion force of the propeller, the mixture in the storage space can be The mixture maintains a certain pressure to ensure that the mixture can be output stably, effectively improving and stabilizing the foaming quality of subsequent foaming products, so the purpose of the present invention can indeed be achieved.

However, the above descriptions are only for illustrating the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, that is, simple equivalent changes and modifications may be made based on the patent scope of the present invention and the contents of the description of the invention. , should still fall within the scope covered by the patent of this invention.

[customary knowledge] 1: Foam injection mixing device 11:Ontology 111:Output port 12: Mixed space 13:Pushing vortex rod 131:Propulsion film 14: Raw material input device 15: Foaming agent input device 2: Mold [Invention] 3: Foam injection mixing device 31: Mixed group 32: Injection group 33:Controller 311: Raw material output device 312: Foaming agent output device Out of the device book out Enter to enter the 313: Mixing drum 314:Gas diffuser 3111:Activity space 3112:Cylinder block 3113: Pusher 3121: Storage bucket 3122:Output unit 321:Storage cylinder 322:Propulsion parts 323:Storage space 4: Mold

Figure 1 is a schematic diagram of the conventional structure. Figure 2 is a schematic structural diagram of a preferred embodiment of the present invention.

3: Foam injection mixing device

31: Mixed group

32: Injection group

33:Controller

311: Raw material output device

312: Foaming agent output device

313: Mixing drum

314:Gas diffuser

3111:Activity space

3112:Cylinder block

3113: Pusher

3121: Storage bucket

3122:Output unit

321:Storage cylinder

322:Propulsion parts

323:Storage space

4: Mold

Claims (2)

A foaming injection mixing device includes a mixing group, an injection group connected to the mixing group, and a controller that controls the mixing group and the injection group respectively; it is characterized in that: the mixing group includes a high-output A raw material output device for molecular raw materials, a foaming agent output device that can output a foaming agent, and a mixing drum that can be connected to the raw material output device and the foaming agent output device respectively; wherein, the raw material output device has a cylinder, An movable space formed in the cylinder and used for filling the polymer raw material, and an ejector that can reciprocate in a linear motion within the movable space, and the ejector can reciprocally push the polymer in the movable space Raw materials are output to input the polymer raw materials into the mixing drum; the foaming agent output device has a storage barrel that can output a foaming agent, and an output unit that controls the output of the foaming agent; the mixing drum is Connected to the output unit and the cylinder, the foaming agent and the polymer raw material are input into the mixing barrel according to a mixing ratio to mix a mixture, and then the mixture is input to the injection group; the injection group has A storage cylinder, a storage space formed in the storage cylinder and used to store the mixture, and a propelling member that can move linearly back and forth in the storage space, and the propelling member can push back and forth linearly in the storage space. The mixed material is outputted into a mold, and the pressure of the mixing drum and the storage space of the storage cylinder are made to be the same through the pressurization of the propelling member; the controller is connected to the pusher and the output unit respectively, and the The controller controls the output unit to output the dosage of the foaming agent based on the dosage value of the polymer raw material filled in the cylinder, the pushing speed of the ejector and the mixing ratio. The foaming injection mixing device according to claim 1, wherein a gas diffuser is provided on the mixing drum so that the mixing drum can communicate with the output through the gas diffuser. The outgoing unit is connected, so that the foaming agent first passes through the gas diffuser and then is input into the mixing drum to be mixed with the polymer raw material.

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