A preparation and molding device and method for supercritical foaming elastomer
By designing supercritical foam elastomer preparation equipment with automated temperature control and pressure relief systems, the problems of high cost of multi-process equipment and unstable cell are solved, and the adjustable and efficient foaming molding of the cell structure is achieved.
Patent Information
- Application Number
- CN202310910016.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-24
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2043-07-24
AI Technical Summary
The existing supercritical foam forming equipment is difficult to implement multiple foaming processes in a single device, resulting in high costs, and manual pressure relief and cooling process are difficult to synchronize, resulting in unstable and difficult to adjust the bubble cells.
A supercritical foam elastomer preparation and forming equipment is designed, including temperature control components, pressure relief parts and flow guides. The synchronization between pressure relief and cooling is achieved through automated control, the structure and density of the bubble cell are adjusted, and the temperature gradient control of the mold is carried out using a thermal oil conduction tank and a pneumatic pressure system.
Different foaming magnifications are achieved in different directions, reducing the impact of material thickness on foaming efficiency, and improving the stability of the bubble cells and the forming quality of the material.
Smart Images
Figure CN116728682B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field related to the preparation of foamed composite materials, in particular to a preparation and molding device and method for a supercritical foamed elastomer. Background Art
[0002] Supercritical foaming molding is a physical foaming molding technology, and also a microcellular foaming molding technology. Supercritical carbon dioxide or nitrogen or other gases are injected into a special plasticizing device to allow the gas to fully and evenly mix / diffuse with the molten raw materials to form a single-phase mixed sol. This sol is then introduced into the mold cavity or extrusion die to cause a large pressure drop in the sol, causing the gas to precipitate and form a large number of bubble nuclei. During the subsequent cooling and molding process, the bubble nuclei inside the sol continue to grow and form, ultimately obtaining a microcellular foamed plastic product.
[0003] Most of the existing preparation equipment has a large output, and it is difficult to realize multiple foaming processes in a single device, which leads to a high overall cost of the existing preparation equipment; the existing technology uses manual control of the pressure relief and cooling process, and it is difficult to ensure that the pressure relief and temperature control are synchronized within a very short time, resulting in unstable bubbles, and the bubble structure is difficult to adjust. The bubble density and bubble size will become irregular, making it difficult to obtain the desired foamed composite material. Summary of the Invention
[0004] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides a preparation and molding device and method for a supercritical foaming elastomer.
[0005] The present invention is achieved by constructing a preparation and molding device and method for a supercritical foamed elastomer, the device comprising a mounting frame, wherein a regulating cylinder for adjusting the height is bolted to the top plate of the mounting frame, a piston rod at the bottom of the regulating cylinder is bolted to the top of the upper mold of the mold, a temperature control component is provided at the right end of the mold, a pressure autoclave is bolted to the left side of the top of the bottom plate of the mounting frame, a feeding piece for unloading is welded to the top pipe of the pressure autoclave, an air guide piece for guiding flow is installed to the air port pipe at the rear end of the mold, and a control piece for controlling is bolted to the left side of the front end of the bottom plate of the mounting frame; wherein the air inlet and outlet of the regulating cylinder are installed with an external pneumatic piece pipe, and the temperature control component, the pressure autoclave and the air guide piece are all electrically connected to the control piece;
[0006] The temperature control assembly includes: a thermal oil tank, a thermal oil tank is installed on the top right bolt of the mounting frame bottom plate; a temperature control component, a temperature control component for controlling the oil temperature is installed on the front bolt of the thermal oil tank; a suction pump, a suction pump for diversion is installed on the oil outlet pipe at the left end of the thermal oil tank; a flow guide component, a flow guide component is installed on the left end pipe of the suction pump; a buffer box, a left end pipe of the flow guide component is installed on the right end face of the buffer box; a temperature detector, a temperature detector for detecting the oil temperature is installed on the left bolt at the front end of the buffer box; a reflux component, a reflux component is installed on the top pipe of the buffer box; the temperature control component, the suction pump and the temperature detector are all electrically connected to the control component.
[0007] The pressure relief part includes: the guide part includes: a diverter valve, a diverter valve is installed on the oil outlet pipeline at the left end of the suction pump; a flow regulating valve, a flow regulating valve for regulating the flow is fixedly installed on the upper and lower sides of the diverter valve through a connecting pipe; a telescopic tube, the oil outlets on the upper and lower sides of the flow regulating valve are respectively installed with a telescopic tube, and the left end of the telescopic tube is installed with the oil inlet pipeline at the right end of the buffer box; a pressure cylinder, the valve body at the left end of the flow regulating valve is fixedly connected to the piston rod at the right end of the pressure cylinder; a pressure relief part, the air outlets on the upper and lower sides of the pressure cylinder are respectively installed with pressure relief parts.
[0008] Preferably, the guide member also includes: a reversing butterfly valve, the air inlet at the left end of the pressure cylinder is installed with the air outlet pipes on the upper and lower sides of the reversing butterfly valve through connecting pipes; a booster air pump, the reversing butterfly valve is installed with the air outlet pipe at the front end of the booster air pump; a first pressure relief valve, the air inlet pipe at the rear end of the booster air pump is installed with a first pressure relief valve; wherein, the diverter valve, flow regulating valve, reversing butterfly valve, booster air pump and first pressure relief valve are all electrically connected to the control member.
[0009] Preferably, the pressure relief component includes: a second pressure relief valve, wherein the air outlets on the upper and lower sides of the pressure cylinder are respectively installed with second pressure relief valves; a collecting valve, wherein the second pressure relief valve is respectively installed with the air inlet pipes on the upper and lower sides of the collecting valve through connecting pipes; a buffer pipe, wherein the rear end of the collecting valve is installed with the through-hole pipe at the front end of the buffer pipe through a connecting pipe; and an elastic component, wherein an elastic component for buffering effect is welded and fixed to the inner rear wall of the buffer pipe.
[0010] Preferably, the pressure relief component further includes: a choke sleeve, the elastic component is welded and fixed to the rear end of the choke sleeve, and the choke sleeve is slidably arranged on the outside of the connecting pipe at the rear end of the collecting valve; a filter box, the rear end of the buffer pipe is installed with the left end pipe of the filter box through a connecting pipe; wherein, the second pressure relief valve and the collecting valve are both electrically connected to the control component.
[0011] Preferably, the return component includes: a first one-way valve, which is fixedly connected to the through hole at the top of the buffer box; a booster component, the top of the first one-way valve is installed with the air hole pipe at the front end of the booster component through a connecting pipe; a return pipe, which is fixedly connected to the return pipe at the rear end of the booster component; a ceramic tube, the return pipe is sleeved on the rear end opening of the ceramic tube; a second one-way valve, the ceramic tube is installed at the rear end of the second one-way valve, and the second one-way valve is fixedly connected to the through hole at the rear end of the buffer box; wherein, the first one-way valve and the second one-way valve are both electrically connected to the control component.
[0012] Preferably, a heat-conducting sleeve is inserted and fixed inside the buffer box, and the heat-conducting sleeve is distributed in the shape of a serpentine glass tube in the left and right directions, and the detection line at the rear end of the temperature detector is inserted and fixed inside the heat-conducting sleeve.
[0013] Preferably, the internal space of the thermal oil tank is arranged into three layers, and the three layers of space are arranged from bottom to top to consist of a refrigeration chamber, a reflux chamber and a heating chamber, and the temperature control component is specifically installed at the front end of the heating chamber. The temperature control component can specifically be composed of a semiconductor heating component and a control circuit.
[0014] Preferably, the air guide includes: a first quick connector, which is fixed to the pipe at the air hole at the rear end of the mold; a proportional valve, which is fixedly installed at the air hole at the left end of the proportional valve; a hand control, which is fixedly installed at the front end of the proportional valve for controlling the adjustment function; and a second quick connector, which is installed on the pipe at the right end of the proportional valve.
[0015] Preferably, the method for preparing and molding a supercritical foamed elastomer is characterized by comprising the following steps:
[0016] Step 1: The staff first adds equal proportions of aromatic polyether, talc, butanediol and stearic acid, and an appropriate amount of isocyanate into the autoclave through the feeding part for blending. The isocyanate here can be toluene diisocyanate or diphenylmethane diisocyanate, and the temperature is increased and blended through the heating part inside the autoclave. The temperature here is higher than the melting point of the material;
[0017] Step 2: The blended material is then injected into the mold through a pressure pump, where the mold forms a pressing action and forms a thermoplastic elastomer special-shaped part or plate, and then the thermal oil heated by the temperature control part in the thermal oil tank is extracted to the diverter valve through a suction pump, so that the diverter valve divides the thermal oil into two streams, and here, because the pressure cylinder does not provide a lateral extrusion force on the valve body of the flow control valve, the thermal oil flows into the buffer boxes on the upper and lower sides of the front end of the mold through the diverter valve and the flow control valve respectively, and the thermal oil is hydraulically forced to flow into the booster through the first one-way valve on the top of the buffer box. The thermal oil flowing through the booster is pressurized and flows into the return pipe and the ceramic tube to heat the upper and lower mold bodies of the mold, thereby reheating the thermoplastic elastomer special-shaped part or plate inside the mold to achieve normalizing treatment of the material and eliminate material stress;
[0018] Step 3: Then, the external foaming gas is input into the mold through the second quick connector via the proportional valve and the first quick connector, and is allowed to stand for a set period of time to allow the foaming gas to penetrate the thermoplastic elastomer special-shaped part or plate;
[0019] Step 4: When the foaming action is required, the air flow inside the mold passes through the first pressure relief valve and is pressurized by the booster air pump and then flows into the reversing butterfly valve, and the pressure relief air flow is divided into two upper and lower streams by the reversing butterfly valve. The pressure ratio of the upper and lower air flows is 3:7, and the derived air pressure is used to push the piston rod inside the pressure cylinder to move and push the valve body of the flow regulating valve to move and control the output flow of the two sets of flow regulating valves for adjustment, so that the high-temperature thermal oil passes through the flow regulating valve and enters the upper and lower molds of the mold to form a certain proportional value. The temperature of the upper and lower mold bodies of the mold forms a temperature gradient, thereby achieving pressure reduction while providing temperature increase, so that the foaming ratio forms different ratios in different directions, so as to reduce the influence of the thickness of the foaming material on the foaming efficiency, and then use the external air source to control the regulating cylinder to drive the upper and lower molds of the mold for secondary pressing to mold the foaming material.
[0020] The present invention has the following advantages: The present invention provides a preparation and molding device and method of a supercritical foaming elastomer through improvement, which has the following improvements compared with similar devices:
[0021] The present invention discloses a preparation and molding device and method for a supercritical foaming elastomer. The temperature control component is arranged at the front end of the mold. The heat-conducting oil is divided into two streams, an upper stream and an lower stream, by a suction pump and a diverter valve. The heat-conducting oil then flows into the buffer boxes on the upper and lower sides of the front end of the mold respectively through the flow regulating valve, and forms a circulating reflux through the first one-way valve and the return pipe and the ceramic tube at the top of the buffer box, thereby reheating the thermoplastic elastomer special-shaped parts or plates inside the mold to achieve normalizing treatment of the material and eliminate the material stress. The booster air pump then divides the depressurized air flow into two streams, an upper stream and an lower stream, through the reversing butterfly valve, and pushes the pressure cylinder to adjust the flow regulating valve, so that the The high-temperature thermal oil enters the upper and lower molds of the mold through the flow control valve, and the flow rate and flow rate form a certain proportional value, so that the temperature of the upper and lower mold bodies of the mold form a temperature gradient, thereby achieving pressure reduction while providing temperature increase, so that the foaming ratio forms different ratios in different directions, so as to reduce the influence of the thickness of the foaming material on the foaming efficiency. Then, the external air source is used to control the regulating cylinder to drive the upper and lower molds of the mold to perform secondary pressing to mold the foam material. The external foaming gas is input into the mold through the proportional valve and the first quick connector through the second quick connector, and is allowed to stand for a set time to allow the foaming gas to penetrate the thermoplastic elastomer special-shaped parts or sheets. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic structural diagram of the present invention;
[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the mold and temperature control assembly of the present invention;
[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the flow guide of the present invention;
[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the return component of the present invention;
[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the buffer box, heat-conducting sleeve and temperature detector of the present invention;
[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the pressure relief member of the present invention;
[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the air guide member of the present invention;
[0029] Figure 8 It is a schematic diagram of the preparation and molding method of the present invention.
[0030] Including: mounting frame-1, regulating cylinder-2, mold-3, temperature control assembly-4, autoclave-5, feeding component-6, air guide component-7, control component-8, thermal oil tank-41, temperature control component-42, suction pump-43, flow guide component-44, buffer tank-45, thermal sleeve-451, temperature detector-46, reflux component-47, diverter valve-441, flow control valve-442, telescopic tube-443, pressure cylinder-444, pressure relief component-445, reversing Butterfly valve 446, booster pump 447, first pressure relief valve 448, second pressure relief valve 4451, collecting valve 4452, buffer tube 4453, elastic member 4454, flow blocking sleeve 4455, filter box 4456, first check valve 471, booster member 472, return pipe 473, ceramic tube 474, second check valve 475, first quick connector 71, proportional valve 72, manual control 73, second quick connector 74. DETAILED DESCRIPTION
[0031] The following is combined with Figures 1 to 8 The principles and features of the present invention are described, and the examples given are only for the purpose of explaining the present invention and are not intended to limit the scope of the present invention. The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are in a very simplified form and are not in exact proportions, and are only used for the purpose of conveniently and clearly assisting in illustrating the embodiments of the present invention.
[0032] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.
[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0034] Example 1:
[0035] See also Figures 1 to 8, a preparation and molding device and method of a supercritical foaming elastomer of the present invention comprises a mounting frame 1, the top plate of the mounting frame 1 is bolted with an adjusting cylinder 2 for adjusting the height, the piston rod at the bottom of the adjusting cylinder 2 is bolted to the top of the upper mold of a mold 3, a temperature control component 4 is provided at the right end of the mold 3, a pressure autoclave 5 is bolted to the left side of the top of the bottom plate of the mounting frame 1, a feeding component 6 for unloading is welded to the top pipe of the pressure autoclave 5, an air guide 7 for guiding the air inlet pipe at the rear end of the mold 3 is bolted, a control component 8 for controlling the air inlet and outlet of the adjusting cylinder 2 is installed with an external pneumatic component pipe, the temperature control component 4, the pressure autoclave 5 and the air guide 7 are all electrically connected to the control component 8 to provide power to the temperature control component 4, the pressure autoclave 5 and the air guide 7;
[0036] The temperature control assembly 4 includes a thermal oil tank 41, and the thermal oil tank 41 is installed on the top right bolt of the bottom plate of the mounting frame 1. The temperature control component 42 for controlling the oil temperature is installed on the front bolt of the thermal oil tank 41. The oil outlet pipe at the left end of the thermal oil tank 41 is installed with a suction pump 43 for diversion. The left end pipe of the suction pump 43 is installed with a guide component 44. The left end pipe of the guide component 44 is installed on the right end face of the buffer box 45. The temperature detector 46 for detecting the oil temperature is installed on the left bolt at the front end of the buffer box 45, and a reflux component 47 is installed on the top pipe of the buffer box 45; the temperature control component 42, the suction pump 43 and the temperature detector 46 are all electrically connected to the control component 8 to provide electrical energy for the temperature control component 42, the suction pump 43 and the temperature detector 46.
[0037] The guide member 44 includes a diverter valve 441. The diverter valve 441 is installed on the oil outlet pipeline at the left end of the suction pump 43. Flow regulating valves 442 for regulating the flow are fixedly installed on the upper and lower sides of the diverter valve 441 through connecting pipes. The oil outlets on the upper and lower sides of the flow regulating valve 442 are respectively installed with telescopic pipes 443, and the left end of the telescopic pipe 443 is installed with the oil inlet pipeline at the right end of the buffer box 45. The valve body at the left end of the flow regulating valve 442 is fixedly connected to the piston rod at the right end of the pressure cylinder 444; a pressure relief member 445 is installed on the air outlets on the upper and lower sides of the pressure cylinder 444. The air inlet at the left end of the pressure cylinder 444 is installed with the air outlet pipes on the upper and lower sides of the reversing butterfly valve 446 through connecting pipes. The reversing butterfly valve 446 is installed with the front air outlet pipe of the boosting air pump 447. The air inlet pipe at the rear end of the boosting air pump 447 is installed with a first pressure relief valve 448. The diverter valve 441, the flow regulating valve 442, the reversing butterfly valve 446, the boosting air pump 447 and the first pressure relief valve 448 are all electrically connected to the control component 8 to provide electrical energy for the diverter valve 441, the flow regulating valve 442, the reversing butterfly valve 446, the boosting air pump 447 and the first pressure relief valve 448.
[0038] The pressure relief component 445 includes a second pressure relief valve 4451. The air outlets on the upper and lower sides of the pressure cylinder 444 are respectively installed with second pressure relief valves 4451. The second pressure relief valve 4451 is respectively installed with the air inlet pipes on the upper and lower sides of the collecting valve 4452 through connecting pipes. The rear end of the collecting valve 4452 is installed with the through-hole pipe at the front end of the buffer pipe 4453 through a connecting pipe. An elastic component 4454 for buffering is welded and fixed to the inner rear wall of the buffer pipe 4453. The elastic component 4454 is welded and fixed to the rear end of the choke sleeve 4455, and the choke sleeve 4455 is slidably arranged on the outside of the connecting pipe at the rear end of the collecting valve 4452. The rear end of the buffer pipe 4453 is installed with the left end pipe of the filter box 4456 through a connecting pipe. The second pressure relief valve 4451 and the collecting valve 4452 are both electrically connected to the control component 8 to provide electrical energy for the second pressure relief valve 4451 and the collecting valve 4452.
[0039] The return component 47 includes a first one-way valve 471, which is fixedly connected to the through hole at the top of the buffer box 45. The top of the first one-way valve 471 is installed with the air hole pipe at the front end of the booster 472 through a connecting pipe. The return pipe 473 is fixedly connected to the rear end pipe of the booster 472. The return pipe 473 is sleeved on the rear end opening of the ceramic tube 474. The ceramic tube 474 is installed at the rear end of the second one-way valve 475, and the second one-way valve 475 is fixedly connected to the through hole at the rear end of the buffer box 45. The first one-way valve 471 and the second one-way valve 475 are both electrically connected to the control component 8 to provide electrical energy for the first one-way valve 471 and the second one-way valve 475.
[0040] A heat-conducting sleeve 451 is inserted and fixed inside the buffer box 45 , and the heat-conducting sleeve 451 is distributed in a serpentine glass tube in the left and right directions. The detection line at the rear end of the temperature detector 46 is inserted and fixed inside the heat-conducting sleeve 451 .
[0041] The internal space of the heat conduction oil tank 41 is arranged into three layers, and the three layers of space are arranged from bottom to top to consist of a refrigeration chamber, a reflux chamber and a heating chamber, and the temperature control component 42 is specifically installed at the front end of the heating chamber. The temperature control component 42 can be specifically composed of a semiconductor heating component and a control circuit.
[0042] The working principle of the preparation and molding device and method of a supercritical foaming elastomer according to Example 1 is as follows:
[0043] First, when using this device, first place the device in the working area, and then connect the device to an external power source to provide the device with the power required for operation.
[0044] Second, the staff first adds 100 parts of aromatic polyether 5039, 5 parts of talc, 10 parts of 1.4-butanediol, 4 parts of stearic acid, and an appropriate amount of isocyanate into the pressure autoclave 5 through the feeding part 6 for blending. The isocyanate here can be toluene diisocyanate or diphenylmethane diisocyanate. The blending temperature is higher than the melting point of the material and the temperature is increased by the internal heating part of the pressure autoclave 5 for blending. Here, the temperature is higher than the melting point of the material.
[0045] Third, the blended material is then injected into the mold 3 through a pressure pump, where the mold 3 forms a pressing action and forms a thermoplastic elastomer special-shaped part or plate, and then the heat-conducting oil heated by the temperature control part 42 in the heat-conducting oil tank 41 is extracted to the diverter valve 441 through the suction pump 43, so that the diverter valve 441 divides the heat-conducting oil into two streams, the upper and lower streams. Here, because the pressure cylinder 444 does not provide a lateral squeezing force on the valve body of the flow regulating valve 442, the heat-conducting oil passes through the diverter valve 441. 441 and flow regulating valve 442 flow into the buffer tank 45 on the upper and lower sides of the front end of the mold 3 respectively, and the heat-conducting oil is hydraulically forced to flow into the booster 472 through the first one-way valve 471 on the top of the buffer tank 45. The heat-conducting oil flowing through the booster 472 is pressurized and flows into the return pipe 473 and the ceramic tube 474 to heat the upper and lower mold bodies of the mold 3, thereby reheating the thermoplastic elastomer special-shaped parts or plates inside the mold 3 to achieve normalizing treatment of the material and eliminate the material stress;
[0046] Fourth, when the foaming action is required, the air flow inside the mold 3 here passes through the first pressure relief valve 448 and is pressurized by the booster air pump 447 and then flows into the reversing butterfly valve 446, and the pressure relief air flow is divided into two upper and lower streams by the reversing butterfly valve 446. The pressure ratio of the upper and lower air flows here is 3:7, and the derived air pressure is used to push the piston rod inside the pressure cylinder 444 to move, thereby pushing the valve body of the flow regulating valve 442 to move, thereby controlling the output flow of the two sets of flow regulating valves 442 for adjustment, so that the flow and flow rate of the high-temperature thermal conductive oil entering the upper and lower molds of the mold 3 through the flow regulating valve 442 form a certain proportional value, so that the temperature of the upper and lower sets of mold bodies of the mold 3 forms a temperature gradient, thereby achieving pressure reduction and providing temperature increase at the same time, so that the foaming ratio forms different ratios in different directions, so as to reduce the influence of the thickness of the foaming material on the foaming efficiency, and then use the external air source to control the regulating cylinder 2 to drive the upper and lower sets of molds of the mold 3 to perform secondary pressing to mold the foaming material.
[0047] Example 2:
[0048] See also Figures 1 to 8, a preparation and molding device and method of a supercritical foamed elastomer of the present invention, compared with the first embodiment, this embodiment further includes: an air guide, the air guide 7 includes a first quick connector 71, the first quick connector 71 is fixedly connected to the pipe at the air hole at the rear end of the mold 3, the first quick connector 71 is fixedly installed at the air hole at the left end of the proportional valve 72, and the proportional valve 72 provides pressure ratio detection for the first quick connector 71 and the second quick connector 74, a manual control 73 for controlling the adjustment effect is fixedly installed at the front end of the proportional valve 72, and a second quick connector 74 is installed on the pipe at the right end of the proportional valve 72.
[0049] In this embodiment:
[0050] During the foaming process, the external foaming gas is first input into the mold 3 through the second quick connector 74 via the proportional valve 72 and the first quick connector 71, and then allowed to stand for a set period of time to allow the foaming gas to penetrate the thermoplastic elastomer special-shaped part or plate.
[0051] The present invention provides a preparation and molding device and method for a supercritical foaming elastomer through improvement. By setting a temperature control component 4 at the front end of a mold 3, the heat-conducting oil is divided into two streams, an upper stream and an lower stream, through a suction pump 43 and a diverter valve 441, and then flows into the interior of a buffer box 45 on the upper and lower sides of the front end of the mold 3 respectively through a flow regulating valve 442, and forms a circulating reflux through a first one-way valve 471 and a return pipe 473 and a ceramic tube 474 at the top of the buffer box 45, thereby reheating the thermoplastic elastomer special-shaped parts or plates inside the mold 3 to achieve normalizing treatment of the material and eliminate the material stress; then, the pressure relief air flow is divided into two streams, an upper stream and an lower stream, through a reversing butterfly valve 446 by a booster air pump 447, and the pressure cylinder 444 is pushed to adjust the flow rate. The throttle valve 442 is adjusted so that the flow rate and flow velocity of the high-temperature thermal conductive oil entering the upper and lower molds of the mold 3 through the flow regulating valve 442 form a certain proportional value, so that the temperature of the upper and lower groups of mold bodies of the mold 3 form a temperature gradient, thereby achieving pressure reduction while providing temperature increase, so that the foaming ratio forms different ratios in different directions to reduce the influence of the foaming material thickness on the foaming efficiency, and then use the external air source to control the regulating cylinder 2 to drive the upper and lower groups of molds of the mold 3 to perform secondary pressing to mold the foaming material, and the external foaming gas is input into the interior of the mold 3 through the proportional valve 72 and the first quick connector 71 through the second quick connector 74, and after standing for a set period of time, the foaming gas is allowed to penetrate into the thermoplastic elastomer special-shaped part or plate.
[0052] The above shows and describes the basic principles, main features and advantages of the present invention, and the standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.
[0053] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A preparation and molding device for a supercritical foaming elastomer, comprising a mounting frame (1), wherein a top plate bolt of the mounting frame (1) is provided with an adjusting cylinder (2) for adjusting the height, a piston rod bolt at the bottom of the adjusting cylinder (2) is provided on the top of the upper mold of a mold (3), a temperature control component (4) is provided at the right end of the mold (3), a pressure cooker (5) is provided with a bolt on the left side of the top of the bottom plate of the mounting frame (1), a feeding piece (6) for unloading is welded to the top pipe of the pressure cooker (5), an air guide piece (7) for guiding the flow is provided on the air inlet pipe at the rear end of the mold (3), and a control piece (8) for controlling the flow is provided on the bolt on the left side of the front end of the bottom plate of the mounting frame (1); wherein, The air inlet and outlet of the regulating cylinder (2) are installed with external pneumatic pipes, and the temperature control component (4), the pressure autoclave (5) and the air guide (7) are all electrically connected to the control component (8); The temperature control assembly (4) comprises: a heat conduction oil tank (41), the heat conduction oil tank (41) is bolted on the top right side of the bottom plate of the mounting frame (1); a temperature control component (42), the temperature control component (42) for controlling the oil temperature is bolted on the front end of the heat conduction oil tank (41); a suction pump (43), the suction pump (43) for diversion is installed on the oil outlet pipe at the left end of the heat conduction oil tank (41); a flow guide (44), the flow guide (44) is installed on the left end pipe of the suction pump (43); a buffer box (45), the left end pipe of the flow guide (44) is installed on the right end face of the buffer box (45); a temperature detector (46), the temperature detector for detecting the oil temperature is bolted on the left side of the front end of the buffer box (45) The detector (46) comprises a return member (47), the top pipeline of the buffer box (45) is provided with a return member (47); the temperature control member (42), the suction pump (43) and the temperature detector (46) are all electrically connected to the control member (8); the flow guide member (44) comprises: a diverter valve (441), the oil outlet pipeline at the left end of the suction pump (43) is provided with a diverter valve (441); a flow regulating valve (442), the diverter valve (441) is fixedly provided with a flow regulating valve (442) for regulating the flow rate through a connecting pipe on both sides thereof; a telescopic pipe (443), the oil outlets at both sides thereof are respectively provided with a telescopic pipe (443), and the left end of the telescopic pipe (443) is connected to the buffer box ( 45) right end oil inlet pipe installation; pressure cylinder (444), the left end valve body of the flow regulating valve (442) is fixedly connected to the right end piston rod of the pressure cylinder (444); pressure relief member (445), the air outlets on the upper and lower sides of the pressure cylinder (444) are respectively installed with pressure relief members (445); the guide member (44) also includes: a reversing butterfly valve (446), the air inlet on the left end of the pressure cylinder (444) is respectively installed with the air outlet pipes on the upper and lower sides of the reversing butterfly valve (446) through a connecting pipe; a booster air pump (447), the reversing butterfly valve (446) is installed with the front end air outlet pipe of the booster air pump (447); a first pressure relief valve (448), the rear end air inlet pipe of the booster air pump (447) is installed A first pressure relief valve (448) is provided; wherein the diverter valve (441), the flow regulating valve (442), the reversing butterfly valve (446), the booster air pump (447) and the first pressure relief valve (448) are all electrically connected to the control component (8); the pressure relief component (445) comprises: a second pressure relief valve (4451), the air outlets on the upper and lower sides of the pressure cylinder (444) are respectively provided with second pressure relief valves (4451); a collecting valve (4452), the second pressure relief valve (4451) is respectively provided with air inlet pipes on the upper and lower sides of the collecting valve (4452) through connecting pipes; and a buffer pipe (4453), the rear end of the collecting valve (4452) is provided with a through-hole pipe at the front end of the buffer pipe (4453) through a connecting pipe;An elastic member (4454) is welded and fixed to the inner rear wall of the buffer tube (4453) with an elastic member (4454) for buffering. The pressure relief member (445) further comprises: a flow blocking sleeve (4455), the elastic member (4454) is welded and fixed to the rear end of the flow blocking sleeve (4455), and the flow blocking sleeve (4455) is slidably arranged on the outside of the connecting pipe at the rear end of the collecting valve (4452); a filter box (4456), the rear end of the buffer tube (4453) is installed with the left end pipeline of the filter box (4456) through the connecting pipe; wherein the second pressure relief valve (4451) and the collecting valve (4452) are both electrically connected to the control member (8).
2. The preparation and molding equipment of a supercritical foamed elastomer according to claim 1, characterized in that: The return component (47) comprises: a first one-way valve (471), the first one-way valve (471) is plugged and fixed at the through hole at the top of the buffer box (45); a pressurizing component (472), the top of the first one-way valve (471) is installed with the air hole pipe at the front end of the pressurizing component (472) through a connecting pipe; a return pipe (473), the return pipe (473) is plugged and fixed at the rear end pipe of the pressurizing component (472); a ceramic tube (474), the return pipe (473) is sleeved at the rear end opening of the ceramic tube (474); a second one-way valve (475), the ceramic tube (474) is installed at the rear end of the second one-way valve (475), and the second one-way valve (475) is plugged and fixed at the through hole at the rear end of the buffer box (45); wherein the first one-way valve (471) and the second one-way valve (475) are both electrically connected to the control component (8).
3. The preparation and molding equipment of a supercritical foamed elastomer according to claim 2, characterized in that: A heat-conducting sleeve (451) is inserted and fixed inside the buffer box (45), and the heat-conducting sleeve (451) is distributed in the form of a serpentine glass tube in the left and right directions. The detection line at the rear end of the temperature detector (46) is inserted and fixed inside the heat-conducting sleeve (451).
4. The preparation and molding equipment of a supercritical foamed elastomer according to claim 3, characterized in that: The internal space of the heat conduction oil tank (41) is arranged into three layers, and the three layers of space are arranged from bottom to top to consist of a refrigeration chamber, a reflux chamber and a heating chamber, and the temperature control component (42) is specifically installed at the front end of the heating chamber. The temperature control component (42) can specifically be composed of a semiconductor heating component and a control circuit.
5. The preparation and molding equipment of a supercritical foamed elastomer according to claim 4, characterized in that: The air guide (7) comprises: a first quick connector (71), the first quick connector (71) being fixedly connected to a pipe at the rear end air hole of the mold (3); a proportional valve (72), the first quick connector (71) being fixedly mounted at the air hole at the left end of the proportional valve (72); a hand control (73), the hand control (73) being fixedly mounted at the front end of the proportional valve (72) for controlling the regulating function; and a second quick connector (74), the second quick connector (74) being mounted on a pipe at the right end of the proportional valve (72).
6. The method for preparing and molding a supercritical foamed elastomer according to claim 5, characterized in that: The following steps are involved: Step 1: The staff first adds equal proportions of aromatic polyether, talcum powder, butanediol and stearic acid, and an appropriate amount of isocyanate into the pressure autoclave (5) through the feeding part (6) for blending. The isocyanate here can be toluene diisocyanate or diphenylmethane diisocyanate, and the temperature is increased and blended through the internal heating part of the pressure autoclave (5). The temperature here is higher than the melting point of the material; Step 2: The blended material is then injected into the mold (3) through a pressure pump, where the mold (3) forms a pressing action and forms a thermoplastic elastomer special-shaped part or plate, and then the heat-conducting oil heated by the temperature control part (42) in the heat-conducting oil tank (41) is extracted to the diverter valve (441) through the suction pump (43), so that the diverter valve (441) divides the heat-conducting oil into two streams, the upper and lower streams. Here, because the pressure cylinder (444) does not provide a lateral extrusion force to the valve body of the flow regulating valve (442), the heat-conducting oil passes through the diverter valve (441). 41) and the flow regulating valve (442) flow into the interior of the buffer box (45) on the upper and lower sides of the front end of the mold (3), respectively, and the heat-conducting oil flows into the interior of the supercharging component (472) through the first one-way valve (471) on the top of the buffer box (45) through hydraulic pressure. The heat-conducting oil flowing through the supercharging component (472) is pressurized and flows into the return pipe (473) and the ceramic tube (474) to heat the upper and lower mold bodies of the mold (3), thereby reheating the thermoplastic elastomer special-shaped parts or plates inside the mold (3) to achieve normalizing treatment of the material and eliminate the material stress; Step 3: Then, the external foaming gas is input into the interior of the mold (3) through the second quick connector (74) via the proportional valve (72) and the first quick connector (71), and is left to stand for a set period of time to allow the foaming gas to penetrate the thermoplastic elastomer special-shaped part or plate; Step 4: When the foaming action is required, the air flow inside the mold (3) passes through the first pressure relief valve (448) and is pressurized by the booster air pump (447) and then flows into the reversing butterfly valve (446). The pressure relief air flow is divided into two streams, the upper and lower streams, by the reversing butterfly valve (446). The pressure ratio of the upper and lower streams is 3:
7. The derived air pressure is used to push the piston rod inside the pressure cylinder (444) to move, thereby pushing the valve body of the flow control valve (442) to move, thereby controlling the output flow of the two sets of flow control valves (442). Adjustment is performed so that the flow rate and flow velocity of the heat-conducting oil entering the upper and lower molds of the mold (3) through the flow regulating valve (442) form a certain proportional value, so that the temperature of the upper and lower mold bodies of the mold (3) forms a temperature gradient, thereby achieving pressure reduction while providing temperature increase, so that the foaming ratio forms different ratios in different directions, so as to reduce the influence of the thickness of the foaming material on the foaming efficiency, and then use the external air source to control the regulating cylinder (2) to drive the upper and lower molds of the mold (3) to perform secondary pressing to mold the foaming material.
Citation Information
Patent Citations
Manufacturing method of foaming structure shoe body with high durability
CN114889032A