Variable-pressure foaming equipment for foam production

Abstract

The utility model provides variable-pressure foaming equipment for foam production. Belongs to the field of foam production. According to the technical key points, the device comprises a foaming mechanism, the foaming mechanism comprises a foaming tank, the top of the foaming tank is detachably connected with a top cover, the bottom of the foaming tank is fixedly connected with a plurality of supporting legs in an annular array mode, the bottom of the foaming tank is fixedly connected with a communicated discharging valve, and the top of the top cover is fixedly connected with a motor; the output end of the motor is fixedly connected with a stirring rod, the stirring rod is arranged in the foaming tank, a hopper is fixed to one side of the interior of the top cover in a penetrating mode, and the top of the hopper is in threaded connection with a matched threaded cover. The utility model aims to provide variable-pressure foaming equipment for foam production. The probability that the pressure reduction efficiency in the foaming tank is reduced due to the fact that gas is difficult to discharge is reduced.

Description

Technical Field

[0001] The utility model relates to the field of foam production, in particular to a variable-pressure foaming device for foam production. Background Technique

[0002] The variable-pressure foaming technology is a technology for producing polyurethane foam. By controlling the pressure of the foaming environment, various density foam products can be produced without any auxiliary foaming agent. This technology was initially applied to the soft foam continuous production line. By segmental control and periodic switching of the system pressure in the closed forming channel, horizontal continuous foaming is achieved.

[0003] At present, the variable-pressure foaming device for foam production mainly realizes pressurization by filling gas into the foaming tank through an air pump, and realizes decompression by opening a pressure reducing valve to discharge the gas inside the foaming tank. Since the foam plastic is light in weight, and the foaming process is often accompanied by stirring to make the foam plastic foam evenly, and the stirring will cause the foam plastic to rise, so that the foam plastic is likely to be discharged from the pressure reducing valve along with the air flow during the opening of the pressure reducing valve. In order to reduce this phenomenon, a filter screen is generally installed at the end of the pressure reducing valve. However, when the filter screen filters, some foam will accumulate in the filter holes under the action of the air flow, resulting in a decrease in the gas throughput, and thus a decrease in the pressure reduction efficiency. Content of the Utility Model

[0004] The purpose of the utility model is to provide a variable-pressure foaming device for foam production to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A variable-pressure foaming device for foam production, comprising

[0007] A foaming mechanism, the foaming mechanism includes a foaming tank, the top of the foaming tank is detachably connected with a top cover, the bottom of the foaming tank is fixedly connected with a plurality of support legs in an annular array, the bottom of the foaming tank is fixedly connected with a discharge valve that is communicated, the top of the top cover is fixedly connected with a motor, the output end of the motor is fixedly connected with a stirring rod, the stirring rod is arranged inside the foaming tank, one side inside the top cover is penetrated with a feed hopper, and the top of the feed hopper is threadedly connected with a matching threaded cover;

[0008] Pressure regulating mechanism, the pressure regulating mechanism includes a connecting pipe fixedly penetrating through one side of the top cover, one end of the connecting pipe away from the top cover is fixedly connected with an air pump, a pressure reducing valve penetrates and is fixedly arranged on one side of the top cover, a filtering disc is arranged at the bottom of the pressure reducing valve, a rotating shaft is fixedly connected to the middle position of the top of the filtering disc, the rotating shaft is rotationally connected with the top cover, a transmission gear is fixedly connected to the outer side of the rotating shaft, a driven gear is meshed and connected to one side of the transmission gear, the driven gear is rotationally connected with the top cover, a driving gear is fixedly connected to the outer side of the stirring rod, and the driving gear is meshed and connected with the driven gear.

[0009] As a further scheme of the present invention: a connecting ring is fixedly connected to the outer side of the foaming tank, and a plurality of connecting bolts are threadedly connected between the connecting ring and the top cover in an annular array.

[0010] As a further scheme of the present invention: a sealing ring abuts against the top of the connecting ring, and the sealing ring is fixedly connected with the top cover.

[0011] As a further scheme of the present invention: a plurality of reinforcing rib plates are fixedly connected to the top of the connecting ring in an annular array, and each group of reinforcing rib plates is fixedly connected to the outer wall of the foaming tank.

[0012] As a further scheme of the present invention: a connecting rope is fixedly connected to the top of the threaded cover, and one end of the connecting rope away from the threaded cover is fixedly connected with the top cover.

[0013] As a further scheme of the present invention: a transmission shaft is fixedly connected to the bottom of the driven gear, and a plurality of fan blades are fixedly connected to the outer wall of the transmission shaft in an annular array.

[0014] As a further scheme of the present invention: a shielding plate is fixedly connected to the inner wall of the top cover, the pressure reducing valve, the rotating shaft and the transmission shaft all penetrate through the shielding plate, and the transmission gear, the driven gear and the driving gear are all arranged above the shielding plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] After the present utility model adopts the above structure, through the mutual cooperation of the driving gear, the driven gear, the transmission gear and the filter disc, when the pressure reducing valve is opened, the filter disc can filter the gas discharged into the pressure reducing valve, thereby reducing the probability of the foam plastic being discharged from the pressure reducing valve. During the process of the stirring rod rotating to stir the foam plastic inside the foaming tank, the driving gear can be driven to rotate. When the driving gear rotates, it can drive the transmission gear and the filter disc to rotate through the transmission of the driven gear, so as to realize the adjustment of the filtering position of the gas discharged from the pressure reducing valve, thereby reducing the probability that the foam plastic accumulates in the filter holes of the filter disc under the action of the air flow due to the long-term use of a certain position of the filter disc to filter the gas discharged into the pressure reducing valve, resulting in difficult gas discharge and further reducing the pressure reduction efficiency inside the foaming tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following further describes the present utility model in detail with reference to the embodiments in the drawings, but it does not constitute any limitation to the present utility model.

[0018] Figure 1 It is a schematic diagram of the overall structure of a variable-pressure foaming device for foam production.

[0019] Figure 2 It is a variable-pressure foaming device for foam production Figure 1 Schematic diagram of the structure of part A.

[0020] Figure 3 It is a partial structural cross-sectional view of a variable-pressure foaming device for foam production.

[0021] Figure 4 It is a variable-pressure foaming device for foam production Figure 3 Schematic diagram of the structure of part B.

[0022] In the figure: 1. Foaming mechanism; 101. Foaming tank; 102. Top cover; 103. Connecting ring; 104. Sealing ring; 105. Connecting bolt; 106. Reinforcing rib plate; 107. Motor; 108. Stirring rod; 109. Discharge valve; 110. Support leg; 111. Hopper; 112. Threaded cover; 113. Connecting rope; 2. Pressure regulating mechanism; 201. Air pump; 202. Connecting pipe; 203. Pressure reducing valve; 204. Baffle plate; 205. Rotating shaft; 206. Filter disc; 207. Driving gear; 208. Driven gear; 209. Transmission gear; 210. Transmission shaft; 211. Fan blade. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following further describes the technical solutions of this patent in detail in combination with the specific embodiments.

[0024] Please refer to Figures 1-4, A variable-pressure foaming device for foam production, including a foaming mechanism 1. The foaming mechanism 1 includes a foaming tank 101. The top of the foaming tank 101 is detachably connected with a top cover 102. The bottom of the foaming tank 101 is fixedly connected with a plurality of support legs 110 in an annular array. The top cover 102 is provided to cover the top of the foaming tank 101. A connecting ring 103 is fixedly connected to the outside of the foaming tank 101. The top of the connecting ring 103 is fixedly connected with a plurality of reinforcing rib plates 106 in an annular array. Each group of reinforcing rib plates 106 is fixedly connected to the outer wall of the foaming tank 101. The arrangement of the reinforcing rib plates 106 can further connect and fix the connecting ring 103 and the foaming tank 101, thereby improving the connection stability between the connecting ring 103 and the foaming tank 101. A plurality of connecting bolts 105 are threadedly connected between the connecting ring 103 and the top cover 102 in an annular array. The connecting bolts 105 are provided to connect and fix the top cover 102 and the connecting ring 103, so as to facilitate the subsequent disassembly of the top cover 102. A sealing ring 104 abuts against the top of the connecting ring 103. The sealing ring 104 is fixedly connected to the top cover 102. The sealing ring 104 is provided to seal the gap between the connecting ring 103 and the top cover 102.

[0025] A discharge valve 109 is fixedly connected to the bottom of the foaming tank 101 and is communicated therewith. The discharge valve 109 is provided to discharge the foamed foam plastic inside the foaming tank 101 when it is opened. A motor 107 is fixedly connected to the top of the top cover 102. The output end of the motor 107 is fixedly connected with a stirring rod 108. The stirring rod 108 is arranged inside the foaming tank 101. The motor 107 is provided to drive the stirring rod 108 to rotate when starting to work, so that the stirring rod 108 can stir the foam plastic inside the foaming tank 101, thereby improving the uniformity of the foam plastic foaming. A pressure reducing valve 203 is fixedly connected through one side of the top cover 102. The pressure reducing valve 203 is provided to facilitate the discharge of the gas inside the foaming tank 101 when it is opened, thereby realizing the pressure reduction inside the foaming tank 101. A filter disc 206 is provided at the bottom of the pressure reducing valve 203. The filter disc 206 is provided to filter the gas discharged into the pressure reducing valve 203, so as to reduce the probability of the foam plastic being discharged from the pressure reducing valve 203.

[0026] A rotating shaft 205 is fixedly connected to the middle position at the top of the filtering disc 206. The rotating shaft 205 is rotatably connected to the top cover 102. A transmission gear 209 is fixedly connected to the outer side of the rotating shaft 205. A driven gear 208 is meshed and connected to one side of the transmission gear 209. The driven gear 208 is rotatably connected to the top cover 102. A driving gear 207 is fixedly connected to the outer side of the stirring rod 108. The driving gear 207 is meshed and connected to the driven gear 208. The driving gear 207 is provided to synchronously rotate the stirring rod 108, so that when the driving gear 207 rotates, the transmission gear 209, the rotating shaft 205 and the filtering disc 206 can be driven to rotate through the transmission of the driven gear 208. When the filtering disc 206 rotates, it can adjust the filtering position of the gas discharged into the pressure reducing valve 203, thereby reducing the probability that foam plastics accumulate in the filter holes of the filtering disc 206 due to the long-term use of a certain position of the filtering disc 206 to filter the gas discharged into the pressure reducing valve 203 under the action of air flow.

[0027] A baffle 204 is fixedly connected to the inner wall of the top cover 102. The pressure reducing valve 203, the rotating shaft 205 and the transmission shaft 210 all penetrate through the baffle 204. The transmission gear 209, the driven gear 208 and the driving gear 207 are all arranged above the baffle 204. The baffle 204 can block the transmission gear 209, the driven gear 208 and the driving gear 207 to reduce the probability that foam plastics fall on the driving gear 207, the driven gear 208 and the transmission gear 209. A transmission shaft 210 is fixedly connected to the bottom of the driven gear 208. A plurality of fan blades 211 are fixedly connected to the outer wall of the transmission shaft 210 in an annular array. The transmission shaft 210 can synchronously rotate the driven gear 208. When the transmission shaft 210 rotates, it can drive each group of fan blades 211 to rotate accordingly, so that the generated air flow can blow towards the filtering disc 206, thereby blowing out the foam plastics blocked in the filter holes of the filtering disc 206, thus realizing the automatic cleaning of the filtering disc 206.

[0028] On one inner side of the top cover 102, it penetrates through the inherent hopper 111. The setting of the hopper 111 can facilitate the discharge of the foam plastic masterbatch into the interior of the foaming tank 101. A thread cover 112 that matches is threadedly connected to the top of the hopper 111. The setting of the thread cover 112 can cover the top of the hopper 111. A connecting rope 113 is fixedly connected to the top of the thread cover 112. One end of the connecting rope 113 far from the thread cover 112 is fixedly connected to the top cover 102. The setting of the connecting rope 113 can connect the thread cover 112 and the top cover 102, thereby reducing the probability of the thread cover 112 being lost after being unscrewed. The pressure regulating mechanism 2, the pressure regulating mechanism 2 includes a connecting pipe 202 fixedly penetrated on one side of the top cover 102. One end of the connecting pipe 202 far from the top cover 102 is fixedly connected to an air pump 201. When the air pump 201 starts to work, it can fill the interior of the foaming tank 101 with gas through the connecting pipe 202, thereby realizing the pressure boost inside the foaming tank 101.

[0029] In use, unscrew the threaded cap 112, place the foam plastic masterbatch to be foamed into the interior of the hopper 111, so that it falls into the interior of the foaming tank 101 through the hopper 111, and then screw the threaded cap 112 again to cover the hopper 111. Then, start the foaming tank 101 and the motor 107, so that the foaming tank 101 heats the foam plastic masterbatch. At the same time, start the air pump 201, so that when the air pump 201 starts to work, it fills the interior of the foaming tank 101 with gas through the connecting pipe 202, causing the pressure inside the foaming tank 101 to increase. At the same time, the molten foam plastic masterbatch expands and foams. During the foaming process, the pressure reducing valve 203 can be started. When the pressure reducing valve 203 is opened, the gas inside the foaming tank 101 can be discharged through the pressure reducing valve 203, thereby reducing the pressure inside the foaming tank 101. During the process of the gas inside the foaming tank 101 being discharged through the pressure reducing valve 203, the filter disc 206 can filter the discharged gas, thereby reducing the probability of foam plastic particles being discharged through the pressure reducing valve 203 during the stirring process. The interior discharges, so that the cooperation between the air pump 201 and the pressure reducing valve 203 is used to adjust the pressure inside the foaming tank 101, and then the foaming degree of the foam plastic is adjusted. When the motor 107 starts to work, it can drive the stirring rod 108 to rotate, so that the stirring rod 108 can stir the foam plastic inside the foaming tank 101 when rotating, making the foam plastic foam more evenly. During the rotation of the stirring rod 108, the driving gear 207 can drive the driven gear 208 and the transmission gear 209 to rotate. When the transmission gear 209 rotates, it can drive the rotating shaft 205 and the filter disc 206 to rotate. When the filter disc 206 rotates, it can switch the filtering position of the gas discharged from the pressure reducing valve 203 to reduce the probability of foam plastic accumulating at a certain position of the filter disc 206, resulting in difficult gas discharge. When the driven gear 208 rotates, it can drive the transmission shaft 210 and each group of fan blades 211 to rotate. The airflow generated when the fan blades 211 rotate can blow towards the top of the filter disc 206, thereby blowing out the foam plastic blocking the filter holes of the filter disc 206, thus realizing the automatic cleaning of the filter disc 206.

[0030] The above-described embodiments are the preferred embodiments of the present invention, which are only used to conveniently illustrate the present invention and do not impose any form of limitation on the present invention. Any person with ordinary knowledge in the technical field can, without departing from the technical features of the present invention, make equivalent embodiments with partial modifications or decorations using the technical content disclosed in the present invention, and without departing from the technical feature content of the present invention, still fall within the scope of the technical features of the present invention.

Claims

1. A variable pressure foaming device for foam production, characterized in that: include A foaming mechanism (1), the foaming mechanism (1) comprising a foaming tank (101), the top of the foaming tank (101) being detachably connected to a top cover (102), the bottom of the foaming tank (101) being fixedly connected to a plurality of supporting legs (110) in a ring array, the bottom of the foaming tank (101) being fixedly connected to a communicating discharge valve (109), the top of the top cover (102) being fixedly connected to a motor (107), the output end of the motor (107) being fixedly connected to a stirring rod (108), the stirring rod (108) being arranged inside the foaming tank (101), the inner side of the top cover (102) passing through a built-in hopper (111), the top of the hopper (111) being threadedly connected to a matching threaded cover (112); A pressure regulating mechanism (2), the pressure regulating mechanism (2) comprising a connecting pipe (202) penetrating and fixed to one side of the top cover (102), an end of the connecting pipe (202) away from the top cover (102) being fixedly connected to an air pump (201), a pressure reducing valve (203) penetrating and fixed to one side of the top cover (102), a filter disc (206) being provided at the bottom of the pressure reducing valve (203), and a rotating shaft (205) being fixedly connected at the middle position of the top of the filter disc (206) The rotating shaft (205) is rotatably connected to the top cover (102); a transmission gear (209) is fixedly connected to the outer side of the rotating shaft (205); a driven gear (208) is meshingly connected to one side of the transmission gear (209); the driven gear (208) is rotatably connected to the top cover (102); a driving gear (207) is fixedly connected to the outer side of the stirring rod (108); the driving gear (207) is meshingly connected to the driven gear (208).

2. A variable pressure foaming equipment for foam production according to claim 1, characterized in that: A connecting ring (103) is fixedly connected to the outer side of the foaming tank (101), and a plurality of connecting bolts (105) are threadedly connected in an annular array between the connecting ring (103) and the top cover (102).

3. A variable pressure foaming equipment for foam production according to claim 2, characterized in that: A sealing ring (104) is abutted against the top of the connecting ring (103), and the sealing ring (104) is fixedly connected to the top cover (102).

4. A variable pressure foaming equipment for foam production according to claim 3, characterized in that: A plurality of reinforcing ribs (106) are fixedly connected to the top of the connection ring (103) in a ring-shaped array, and each group of the reinforcing ribs (106) is fixedly connected to the outer wall of the foaming tank (101).

5. The variable pressure foaming equipment for foam production according to claim 1, characterized in that: A connecting rope (113) is fixedly connected to the top of the threaded cover (112), and one end of the connecting rope (113) away from the threaded cover (112) is fixedly connected to the top cover (102).

6. The variable pressure foaming equipment for foam production according to claim 1, characterized in that: The bottom of the driven gear (208) is fixedly connected to a transmission shaft (210), and the outer wall of the transmission shaft (210) is fixedly connected to a plurality of fan blades (211) in a ring array.

7. The variable pressure foaming equipment for foam production according to claim 1, characterized in that: A baffle plate (204) is fixedly connected to the inner wall of the top cover (102); the pressure reducing valve (203), the rotating shaft (205) and the transmission shaft (210) all pass through the baffle plate (204); and the transmission gear (209), the driven gear (208) and the driving gear (207) are all arranged above the baffle plate (204).

Images