Production method and production equipment of automobile seat cushion

Abstract

The invention belongs to the technical field of automobile seat cushion production, and particularly relates to a production method and production equipment of an automobile seat cushion. The production method comprises the following steps: step 1, raw material mixing: adding various raw materials into a stirring device according to a ratio, and stirring and mixing at a constant temperature; 2, leveling and cutting are conducted, specifically, the mixed materials are poured out and flattened into thick pieces with a certain thickness through a machine, and then the thick pieces are cut into a plurality of blanks with the same size and weight through a cutting device; 3, blank preheating is conducted, specifically, the cushion blank is baked and softened; and 4, extrusion forming is conducted, specifically, the baked and softened blank is put into production equipment to be subjected to compression forming, and then the cushion body is obtained.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile seat cushion production, and in particular relates to a production method and production equipment for an automobile seat cushion. Background Art

[0002] With the rapid development of the automobile industry and people's constant pursuit of comfort, car seats, as one of the important riding components in the car, have higher requirements for passengers' comfort and experience, so most of them will place a cushion on the seat. During long-term driving or riding, a suitable cushion can provide good support and shock absorption effects, relieve passengers' fatigue and improve driving safety.

[0003] Traditional seat cushions need to be formed by hot pressing, and after forming, they need to wait for cooling before being taken out, which prolongs the production time and affects production efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a method and equipment for producing a car seat cushion which can improve production efficiency and ensure production quality in view of the above-mentioned technical problems.

[0005] In view of this, the present invention provides a method for producing a car seat cushion, comprising the following steps: Step 1: Mixing raw materials: adding various raw materials in proportion into a stirring device for constant temperature stirring and mixing; Step 2: Leveling and cutting: pour out the mixed material and flatten it into a thick sheet of a certain thickness through a machine, and then cut it into several blanks of the same size and weight through a cutting device; Step 3: preheating the blank and baking and softening the cushion blank; Step 4: extrusion molding, putting the baked and softened blank into the production equipment for compression molding to obtain the cushion body; The blank undergoes three steps of heating, heat preservation and cooling during the pressing process to obtain the cushion body.

[0006] A production device for an automobile seat cushion, comprising: A frame having an upper support plate and a lower base, and a plurality of support rods are arranged between the upper support plate and the lower base; A lower mold plate, fixedly arranged on the lower base and having an upper end surface thereof formed with a lower molding surface of the mold; The upper mold plate is slidably arranged on the support rod, and an upper molding surface is formed at the lower end thereof, and the upper molding surface and the lower molding surface are buckled to form a mold cavity; The driving mechanism is arranged at the upper end of the upper support plate, and the driving end is fixedly connected to the upper end of the upper template, thereby driving the upper template to move up and down under the positioning of the support rod; A plurality of temperature sensors are respectively arranged on the upper template and the lower template, and are used to detect the temperature of the middle and outer edges of the lower template and the upper template; Internal temperature control system, used to control the temperature of the lower and upper templates; The internal temperature control system includes: Internal temperature-controlled flow channels are formed in the lower mold plate and the upper mold plate respectively; The external temperature control circuit is connected to the internal temperature control flow channel, so that the heating or cooling medium is input into the internal temperature control flow channel.

[0007] In the above technical solution, further, the internal temperature control flow channel includes: The external low temperature channel is formed in the upper template or the lower template, distributed along the outer edge of the upper template or the lower template, and has two ends extending from the side wall of the upper template or the lower template; The inner high temperature channel is formed in the upper template or the lower template and is located inside the outer low temperature channel, and the two ends extend from the side wall of the lower template or the upper template respectively; The internal heating pipeline is arranged in the internal high-temperature channel, and both ends thereof extend from the side walls of the lower template or the upper template respectively.

[0008] In the above technical solution, further, the internal temperature control flow channel also includes: Internal heating wires, several of which are arranged in the internal heating pipe.

[0009] In the above technical solution, further, the external temperature control circuit includes: The outlet of the heating supplement tank is connected to the inlet of the internal heating pipeline on the upper template and the lower template through the heating supplement pipe; The high-temperature supplement tank, the outlet of which can be connected to the inlet of the internal high-temperature channel on the upper template and the lower template respectively through the high-temperature supplement pipe; The outlet of the insulation supplement tank can be connected to the inlet of the external low-temperature channel on the upper template and the lower template respectively through the insulation supplement pipe; The outlet of the low-temperature supplement tank can be connected to the inlet of the internal heating pipeline, the internal high-temperature channel and the external low-temperature channel on the upper template and the lower template respectively through the low-temperature supplement pipe; The outlet of the cryogenic compensation tank is connected to the inlet of the cryogenic supplementary tank through a cryogenic compensation pipe; The outlet of the heating compensation tank is connected to the inlet of the heating supplement tank through a heating compensation pipe.

[0010] In the above technical solution, further, it also includes: A heating supplementary pump is arranged on the heating supplementary pipe; A high temperature supplementary pump is arranged on the high temperature supplementary pipe; A thermal insulation supplementary pump is arranged on the thermal insulation supplementary pipe; A low temperature compensation pump, arranged on the low temperature compensation pipe; A supplementary cryogenic pump set is arranged on the cryogenic supplementary pipe; A heating compensation pump is arranged on the heating compensation pipe; The supplementary low-temperature pump group includes two low-temperature supplementary pumps connected in series, and is provided with a low-temperature supplementary valve. The low-temperature supplementary valve is arranged between the two low-temperature supplementary pumps, and a low-temperature supplementary parallel pipe crossing one of the low-temperature supplementary pumps is connected to the low-temperature supplementary valve; that is, the low-temperature supplementary valve is a two-position three-way solenoid valve. When the valve core of the low-temperature supplementary valve is in the first position, the cooling medium output from the low-temperature supplementary tank is only pressurized once by a low-temperature supplementary pump on the side of the low-temperature supplementary pump and then transported to the inner heating pipeline and / or the inner high-temperature channel and / or the outer low-temperature channel; when the valve core of the low-temperature supplementary valve is in the second position, the cooling medium output from the low-temperature supplementary tank is successively passed through the two low-temperature supplementary pumps and then pressurized for a second time and then transported to the inner heating pipeline and / or the inner high-temperature channel and / or the outer low-temperature channel; and the output power of the two low-temperature supplementary pumps, the diameter of the connecting pipeline, etc. are set according to actual needs.

[0011] In the above technical solution, further, it also includes: A heating output pipe is provided with a temperature detector I, one end of which is connected to the outlet end of the internal heating pipeline, and the other end is provided with a heating output valve, through which the medium in the internal heating output pipe is controlled to enter the high-temperature supplementary tank or a heating output branch pipe; A high-temperature output pipe is provided with a temperature detector II, one end of which is connected to the outlet end of the inner high-temperature channel, and the other end is provided with a high-temperature output valve, through which the medium in the high-temperature output pipe is controlled to enter the insulation supplement tank or a high-temperature output branch pipe; The insulation output pipe is provided with a temperature detector III, one end of which is connected to the outlet end of the external low-temperature channel, and the other end is provided with an insulation output valve, through which the medium in the insulation output pipe is controlled to enter the low-temperature compensation tank or an insulation output branch pipe.

[0012] In the above technical solution, further, it also includes: A heating branch valve is connected to the other end of the heating output branch pipe, and controls the medium in the heating output branch pipe to enter the insulation supplement tank or an insulation branch pipe through the heating branch valve; The insulation branch valve is connected to the other end of the insulation branch pipe, and the medium in the insulation branch pipe is controlled to enter the low-temperature compensation tank or an insulation return pipe through the insulation branch valve; The other end of the high-temperature output branch pipe is connected to the middle of the insulation branch pipe, the other end of the insulation output branch pipe is connected to the middle of the insulation return pipe, and the end of the insulation return pipe is connected to the heating compensation tank.

[0013] In order to better classify and discharge the medium transported to the insulation branch pipe, a temperature detector IV is arranged at one end of the insulation branch pipe close to the insulation branch valve.

[0014] In the above technical solution, further, it also includes: A heat preservation buffer pipe, one end of which is connected to the low-temperature supplementary pipe, and the other end of which is connected to the inlet end of the external low-temperature channel, and a heat preservation control valve is provided at one end close to the low-temperature supplementary pipe, and a heat preservation regulating valve is provided at one end close to the external low-temperature channel; A high-temperature buffer pipe, one end of which is connected to a low-temperature supplementary pipe, and the other end of which is connected to a high-temperature receiving pipe, and a high-temperature control valve is provided at one end close to the low-temperature supplementary pipe, and a high-temperature regulating valve is provided at one end close to the high-temperature receiving pipe; A heating buffer pipe, one end of which is connected to the low-temperature supplementary pipe, and the other end of which is connected to a heating receiving pipe, and a heating control valve is provided at one end close to the low-temperature supplementary pipe, and a heating regulating valve is provided at one end close to the heating receiving pipe; The medium in the high-temperature receiving tube can eventually enter the inner high-temperature channel, and the medium in the heating receiving tube can eventually enter the inner heating pipeline.

[0015] In the above technical solution, further, it also includes: The insulation delivery main pipe has one end connected to the outlet of the insulation supplement pipe and the other end connected to the inlet of the external low-temperature channel on the upper template and the lower template, and the end close to the insulation supplement pipe is provided with an insulation delivery main valve; The insulation delivery branch pipe has one end connected to the outlet end of the insulation supplement pipe and the other end connected to the high-temperature receiving pipe, and the end close to the insulation supplement pipe is provided with an insulation delivery branch valve, and the end close to the high-temperature receiving pipe is provided with an insulation output branch valve; The high-temperature delivery main pipe has one end connected to the outlet end of the high-temperature supplementary pipe and the other end connected to the inlet end of the internal high-temperature channel on the upper and lower templates, and a high-temperature output main valve is provided at the end close to the high-temperature supplementary pipe; A high-temperature delivery branch pipe, one end of which is connected to the outlet end of the high-temperature supplementary pipe, and the other end is connected to the heating receiving pipe, and a high-temperature delivery branch valve is provided on the end close to the high-temperature supplementary pipe, and a high-temperature branch valve is provided on the end close to the heating receiving pipe; One end of the high-temperature receiving pipe is connected to the high-temperature buffer pipe and the insulation delivery branch pipe, and the other end is connected to the high-temperature delivery main pipe on the side of the inner high-temperature channel of the upper template and the lower template, and a high-temperature cooling valve is arranged at this end; one end of the heating receiving pipe is connected to the heating buffer pipe and the high-temperature delivery branch pipe, and the other end is connected to the heating supplementary pipe on the side of the inlet end of the inner heating pipeline, and a heating cooling valve is arranged at this end; and a heating delivery valve is arranged on the side of the heating supplementary pipe away from the inlet end of the inner heating pipeline.

[0016] The beneficial effects of the present invention are: 1. The production method of the automobile seat cushion of the present invention improves the production efficiency and production quality of the seat cushion; 2. The production device can change the temperature of the lower mold plate and the lower mold plate by setting an internal temperature control flow channel in the upper mold plate, that is, it can also change the temperature of the lower molding surface and the upper molding surface, thereby achieving the effect of heating, keeping warm and cooling the blank; 3. The production device can reduce the energy consumed by heating the corresponding supplementary tank by transferring the heating medium to the supplementary tank with lower temperature requirements. The lower temperature medium discharged into the low temperature compensation tank can also reduce the energy consumed by the low temperature compensation tank for cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the device in the present invention; Figure 2 It is a cross-sectional schematic diagram of the upper template or the lower template in the present invention; Figure 3 This is a schematic diagram of one structure of the internal temperature control system of the present invention; Figure 4 It is another structural schematic diagram of the internal temperature control system in the present invention; The symbols in the figure are as follows: 1-heating supplement tank, 2-heating supplement pipe, 3-high temperature supplement tank, 4-high temperature supplement pipe, 5-insulation supplement tank, 6-insulation supplement pipe, 7-low temperature supplement tank, 8-low temperature supplement pipe, 9-low temperature compensation tank, 10-low temperature compensation pipe, 11-heating compensation tank, 12-heating compensation pipe, 13-heating supplement pump, 14-high temperature supplement pump, 15-insulation supplement pump, 16-low temperature compensation pump, 17-heating compensation pump, 18 - low temperature replenishment pump, 19- low temperature replenishment valve, 20- heating output pipe, 21- temperature detector Ⅰ, 22- heating output valve, 23- heating output branch pipe, 24- high temperature output pipe, 25- temperature detector Ⅱ, 26- high temperature output valve, 27- high temperature output branch pipe, 28- insulation output pipe, 29- temperature detector Ⅲ, 30- insulation output valve, 31- insulation output branch pipe, 32- heating branch valve, 33- temperature branch pipe, 34- insulation branch valve, 35-insulation reflux pipe, 36-temperature detector IV, 37-insulation buffer pipe, 38-insulation control valve, 39-insulation regulating valve, 40-high temperature buffer pipe, 41-high temperature receiving pipe, 42-high temperature control valve, 43-high temperature regulating valve, 44-heating buffer pipe, 45-heating receiving pipe, 46-heating control valve, 47-heating regulating valve, 48-insulation delivery main pipe, 49-insulation delivery main valve, 50-insulation delivery branch pipe, 51-insulation Temperature delivery branch valve, 52-insulation output branch valve, 53-high temperature delivery main pipe, 54-high temperature delivery main valve, 55-high temperature delivery branch pipe, 56-high temperature delivery branch valve, 57-high temperature output branch valve, 58-heating delivery valve, 59-high temperature cooling valve, 60-heating cooling valve, 100-frame, 101-lower template, 102-upper template, 103-external low temperature channel, 104-internal high temperature channel, 105-internal heating pipeline, 106-internal heating wire. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0019] Embodiment 1: This embodiment provides a method for producing a car seat cushion, comprising the following steps: Step 1: Mixing raw materials: adding various raw materials in proportion into a stirring device for constant temperature stirring and mixing; Step 2: Leveling and cutting: pour out the mixed material and flatten it into a thick sheet of a certain thickness through a machine, and then cut it into several blanks of the same size and weight through a cutting device; Step 3: preheating the blank and baking and softening the cushion blank; Step 4: extrusion molding, putting the baked and softened blank into the production equipment for compression molding to obtain the cushion body; The blank undergoes three steps of heating, heat preservation and cooling during the pressing process to obtain the cushion body.

[0020] In this embodiment, the preheating effect is achieved by first baking and softening the blank, so that it can be placed in the molding equipment better, thereby reducing the heating time during hot pressing; then the blank is heated and extruded by the extrusion molding equipment, the heat-insulating and stable structure is finalized, and the cushion body is obtained by the cooling process. The extrusion molding and rapid cooling processes are completed by one production equipment, thereby improving the production efficiency of the cushion. And when cooling the molded cushion body, the production equipment gradually introduces cooling media with different temperatures and flow rates to achieve step-by-step gradual cooling. The blanks in step 2 can be mass-produced and stored in advance according to different ratios, so as to facilitate later production.

[0021] Embodiment 2: This embodiment provides a production device for a car seat cushion, comprising: The frame 100 has an upper support plate and a lower base, and a plurality of support rods are arranged between the upper support plate and the lower base; The lower mold plate 101 is fixedly arranged on the lower base and has a lower molding surface of the mold formed on its upper end surface; The upper mold plate 102 is slidably disposed on the support rod, and an upper molding surface is formed at its lower end, and the upper molding surface and the lower molding surface are buckled to form a mold cavity; The driving mechanism is arranged at the upper end of the upper support plate, and the driving end is fixedly connected to the upper end of the upper template 102, thereby driving the upper template 102 to move up and down under the positioning of the support rod; A plurality of temperature sensors are respectively arranged on the upper template 102 and the lower template 101, and are used to detect the temperature of the middle and outer edges of the lower template 101 and the upper template 102; Internal temperature control system, used to control the temperature of the lower template 101 and the upper template 102; The internal temperature control system includes: Internal temperature control channels are formed in the lower mold plate 101 and the upper mold plate 102 respectively; The external temperature control circuit is connected to the internal temperature control flow channel, so that the heating or cooling medium is input into the internal temperature control flow channel.

[0022] In this embodiment, the upper template 102 cooperates with the lower template 101 to complete the extrusion molding of the cushion body; the driving mechanism can be a hydraulic drive cylinder; by setting an internal temperature control flow channel in the lower template 101 and the lower template 101, the temperature of the lower template 101 and the lower template 101 can be changed, that is, the temperature of the lower molding surface and the upper molding surface can also be changed, thereby achieving the effect of heating, heat preservation and cooling the blank; and the set external temperature control circuit provides a heating or cooling medium for the internal temperature control flow channel, thereby automatically controlling the temperature of the lower template 101 and the upper template 102, and the heating or cooling medium is the same fluid medium with different temperatures. The internal temperature control system also includes an external control cabinet, which is equipped with a controller and a control circuit, thereby realizing the automatic operation of the internal temperature control system. During the pressing process, the temperature on the upper template 102 and the lower template 101 during the heating process is greater than the temperature during the heat preservation process. The temperature sensor can better determine the specific temperature of the upper template 102 or the lower template 101, so as to facilitate the internal temperature control system to timely control the temperature of the upper template 102 and the lower template 101.

[0023] And an internal temperature control system can control the temperature of one or more production equipment at the same time.

[0024] Embodiment 3: This embodiment provides a production device for automobile seat cushions, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0025] The internal temperature control flow channel comprises: The external low temperature channel 103 is formed in the upper template 102 or the lower template 101, distributed along the outer edge of the upper template 102 or the lower template 101, and has two ends extending from the side walls of the upper template 102 or the lower template; The inner high temperature channel 104 is formed in the upper template 102 or the lower template 101 and is located inside the outer low temperature channel 103, and both ends extend from the side wall of the lower template 101 or the upper template 102 respectively; The internal heating pipe 105 is disposed in the internal high-temperature channel 104 , and both ends thereof extend from the side walls of the lower mold plate 101 or the upper mold plate 102 .

[0026] In this embodiment, the outer low-temperature channel 103 is located at the outer edge of the upper template 102 and the lower template 101. When the blank is heated by hot pressing, the temperature of the heating medium entering the outer low-temperature channel 103 is lower than the heating medium of the inner high-temperature channel 104 and the inner heating pipe 105; thereby reducing the deformation and distortion of the edge of the cushion body due to excessive temperature during the hot pressing process, thereby ensuring the stability of the formed cushion structure; at the same time, the outer low-temperature channel 103 can also play a good heat preservation effect during the hot pressing process, thereby improving the effect of heating the blank. By inputting a higher temperature heating medium into the inner high-temperature channel 104, the temperature of the upper and lower molding surfaces can be increased, so as to better complete the hot pressing of the cushion. By conveying a heating medium with a temperature greater than that of the inner high-temperature channel 104 to the inner heating pipe 105, the heating medium in the inner heating channel can be further heated, thereby ensuring that the lower template 101 and the upper template 102 can reach a temperature that ensures the hot pressing effect. In order to facilitate the processing of the outer low-temperature channel 103, the inner high-temperature channel 104 and the inner heating pipe 105, the upper template 102 and the lower template 101 can be composed of two half templates that are buckled and fixed, and the outer low-temperature channel 103, the inner high-temperature channel 104 and the inner heating pipe 105 are formed between the two half templates.

[0027] Embodiment 4: This embodiment provides a production device for automobile seat cushions, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0028] The internal temperature control flow channel also includes: Internal heating wires 106 , several of which are arranged in the internal heating pipe 105 .

[0029] In this embodiment, the setting of the internal heating wire 106 can further heat the input internal heating pipe 105 when the heating temperature is insufficient or the temperature of the lower template 101 and the upper template 102 does not reach the preset temperature, thereby better ensuring that the hot pressing temperature between the upper template 102 and the lower template 101 can reach the optimal state.

[0030] Embodiment 5: This embodiment provides a production device for automobile seat cushions, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0031] The external temperature control circuit comprises: The outlet of the heating replenishment tank 1 is connected to the inlet of the internal heating pipeline 105 on the upper template 102 and the lower template 101 through the heating replenishment pipe 2; The outlet of the high-temperature supplement tank 3 can be connected to the inlet of the inner high-temperature channel 104 on the upper template 102 and the lower template 101 through the high-temperature supplement pipe 4; The outlet of the insulation supplement tank 5 can be connected to the inlet of the outer low-temperature channel 103 on the upper template 102 and the lower template 101 respectively through the insulation supplement pipe 6; The outlet of the low-temperature supplement tank 7 can be connected to the inlet of the inner heating pipeline 105, the inner high-temperature channel 104 and the outer low-temperature channel 103 on the upper template 102 and the lower template 101 through the low-temperature supplement pipe 8; The outlet of the low temperature compensation tank 9 is connected to the inlet of the low temperature supplement tank 7 through the low temperature compensation pipe 10; The outlet end of the heating compensation tank 11 is connected to the inlet end of the heating supplement tank 1 through the heating compensation pipe 12.

[0032] In this embodiment, the heating supplementary tank 1 mainly provides heating medium for the internal heating pipeline 105; the high-temperature supplementary tank 3 mainly provides heating medium for the internal high-temperature channel 104; the thermal insulation supplementary tank 5 mainly provides heating medium for the external low-temperature channel 103; and the heating compensation tank 11 mainly provides a heating medium of a certain temperature for the heating supplementary tank 1, and can also preheat the medium entering the heating supplementary tank 1, thereby reducing the heating time of the heating supplementary tank, and ensuring that the heating supplementary tank 1 can output the heating medium in a timely and sufficient manner; the low-temperature compensation tank 9 mainly provides cooling medium for the internal heating pipeline 105, the internal high-temperature channel 104 and the external low-temperature channel 103; and the low-temperature compensation tank 9 can timely replenish the low-temperature compensation tank 9 with cooling medium of a certain temperature, and can also pre-cool the cooling medium entering the low-temperature supplementary tank 7, thereby reducing the cooling time of the cooling supplementary tank, and ensuring that the cooling supplementary tank can output the cooling medium in a timely and sufficient manner.

[0033] A heater and a heating medium temperature sensor are respectively arranged in the heating supplement tank 1, the high temperature supplement tank 3, the insulation supplement tank 5 and the heating compensation tank 11. The heater is controlled by the controller, and the heating medium temperature sensor feeds back the detected real-time temperature data to the controller; through the cooperation of the heater and the heating medium temperature sensor, the controller can ensure that the temperature of the heating medium in the heating supplement tank 1, the high temperature supplement tank 3, the insulation supplement tank 5 and the heating compensation tank 11 can reach the preset temperature value. At the same time, the controller sets the preset temperature of the heating medium in the heating supplement tank 1 to T 热1 The preset temperature of the heating medium in the high temperature supplementary tank 3 is T 热2 The preset temperature of the heating medium in the insulation supplementary tank 5 is T 热3 The preset temperature of the heating medium in the heating compensation tank 11 is T 热4 , and T 热1 ≥T 热4 >T 热2 >T 热3 .

[0034] In the heating process of pressing and molding, the heating supplementary tank 1 transports heating medium to the inner heating pipe 105, the high-temperature supplementary tank 3 transports heating medium to the inner high-temperature channel 104, and the insulation supplementary tank 5 transports heating medium to the outer low-temperature channel 103; in the insulation process of pressing and molding, the heating supplementary tank 1 stops transporting heating medium to the inner heating pipe 105, the high-temperature supplementary tank 3 continues to transport heating medium to the inner high-temperature channel 104, and the insulation supplementary tank 5 continues to transport heating medium to the outer low-temperature channel 103; and in the heating and insulation process of pressing and molding, the flow rate of the heating medium input into the outer low-temperature channel 103, the inner high-temperature channel 104 and the inner heating pipe 105 is adjusted in real time according to the real-time value detected by the temperature sensor.

[0035] A cooler and a cooling medium temperature sensor are respectively provided in the low temperature supplement tank 7 and the low temperature compensation tank 9. The cooler is controlled by a controller, and the cooling medium temperature sensor feeds back the detected real-time temperature to the controller. The cooperation of the cooler and the cooling medium temperature sensor can ensure that the temperature of the cooling medium in the low temperature supplement tank 7 and the low temperature compensation tank 9 can reach the preset temperature value. At the same time, the controller sets the preset temperature of the cooling medium in the low temperature compensation tank 9 as T 冷1 ; The preset temperature of the cooling medium in the low temperature supplement tank 7 is T 冷2 , and T 冷1 ≥T 冷2 ; and T 热3 >T 冷1 .

[0036] In the cooling process of the press molding, the low temperature supplement tank 7 gradually inputs the cooling medium into the inner heating pipe 105, the inner high temperature channel 104 and the outer low temperature channel 103; and in the cooling process of the press molding, the flow rate of the cooling medium input into the outer low temperature channel 103, the inner high temperature channel 104 and the inner heating pipe 105 is adjusted in real time according to the real-time value detected by the temperature sensor. Thus, the temperature is lowered in a gradually decreasing manner, rather than directly introducing a large amount of cooling medium for cooling, so as to ensure the service life of the entire equipment and the yield rate of the formed cushion body.

[0037] At the same time, in order to prevent the medium in the heating supplementary tank 1, the high-temperature supplementary tank 3, the thermal insulation supplementary tank 5, the low-temperature supplementary tank 7, the low-temperature compensation tank 9 and the heating compensation tank 11 from being overfull or too little, liquid level sensors, overflow valves and liquid replenishment pipes are provided in the heating supplementary tank 1, the high-temperature supplementary tank 3, the thermal insulation supplementary tank 5, the low-temperature supplementary tank 7, the low-temperature compensation tank 9 and the heating compensation tank 11, so as to ensure the stock of the medium in the heating supplementary tank 1, the high-temperature supplementary tank 3, the thermal insulation supplementary tank 5, the low-temperature supplementary tank 7, the low-temperature compensation tank 9 and the heating compensation tank 11.

[0038] Embodiment 6: This embodiment provides a production device for automobile seat cushions, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0039] Also includes: A heating supplementary pump 13 is arranged on the heating supplementary pipe 2; A high temperature supplementary pump 14 is provided on the high temperature supplementary pipe 4; A heat preservation supplementary pump 15 is arranged on the heat preservation supplementary pipe 6; A low temperature compensation pump 16 is arranged on the low temperature compensation pipe 10; A supplementary cryogenic pump group is arranged on the cryogenic supplementary pipe 8; A heating compensation pump 17 is arranged on the heating compensation pipe 12; The supplementary cryogenic pump group includes two cryogenic supplementary pumps 18 connected in series, and is provided with a cryogenic supplementary valve 19, which is arranged between the two cryogenic supplementary pumps 18, and is connected to a cryogenic supplementary parallel pipe crossing one of the cryogenic supplementary pumps 18; that is, the cryogenic supplementary valve 19 is a two-position three-way solenoid valve, and when the valve core of the cryogenic supplementary valve 19 is in the first position, the cooling medium output from the cryogenic supplementary tank 7 is only pressurized once by a cryogenic supplementary pump 18 on the side of the cryogenic supplementary pump 18 and then transported to the inner heating pipe 105 and / or the inner high temperature channel 104 and / or the outer low temperature channel 103; when the valve core of the cryogenic supplementary valve 19 is in the second position, the cooling medium output from the cryogenic supplementary tank 7 is sequentially passed through the two cryogenic supplementary pumps 18 and then pressurized twice and then transported to the inner heating pipe 105 and / or the inner high temperature channel 104 and / or the outer low temperature channel 103; and the output power of the two cryogenic supplementary pumps 18, the pipe diameter of the connecting pipe, etc. are set according to actual needs.

[0040] In this embodiment, the heating supplementary pump 13 can better transport the heating medium in the heating supplementary tank 1 to the internal heating pipe 105; the high-temperature supplementary pump 14 can better transport the heating medium in the high-temperature supplementary tank 3 to the internal high-temperature channel 104; the insulation supplementary pump 15 can better transport the heating medium in the insulation supplementary tank 5 to the external low-temperature channel 103; the low-temperature compensation pump 16 can better transport the cooling medium in the low-temperature compensation tank 9 to the low-temperature supplementary tank 7; and the heating compensation pump 17 can better transport the heating medium in the heating compensation tank 11 to the low-temperature supplementary tank 7. The medium is transported to the heating supplementary tank 1 for replenishment; and the setting of the supplementary low-temperature pump group can better transport the cooling medium in the low-temperature compensation tank 9 to the internal heating pipe 105, the internal high-temperature channel 104 and the external low-temperature channel 103. At the same time, through the cooperation of two low-temperature supplementary pumps 18 and the low-temperature supplementary valve 19, the cooling medium in the low-temperature compensation tank 9 can be secondary pressurized and transported. When the cooling medium is transported to the internal heating pipe 105, the internal high-temperature channel 104 and the external low-temperature channel 103 at the same time, the cooling and heating effects on the upper template 102 and the lower template 101 can also be guaranteed.

[0041] Embodiment 7: This embodiment provides a production device for automobile seat cushions, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0042] Also includes: The heating output pipe 20 is provided with a temperature detector I 21, one end of which is connected to the outlet end of the internal heating pipe 105, and the other end of which is provided with a heating output valve 22, through which the medium in the internal heating output pipe 20 is controlled to enter the high-temperature supplementary tank 3 or a heating output branch pipe 23; A high temperature output pipe 24 is provided with a temperature detector II 25, one end of which is connected to the outlet end of the inner high temperature channel 104, and the other end is provided with a high temperature output valve 26, through which the medium in the high temperature output pipe 24 is controlled to enter the insulation supplementary tank 5 or a high temperature output branch pipe 27; The insulation output pipe 28 has a temperature detector III 29, one end of which is connected to the outlet end of the external low-temperature channel 103, and the other end is provided with an insulation output valve 30. The insulation output valve 30 controls the medium in the insulation output pipe 28 to enter the low-temperature compensation tank 9 or an insulation output branch pipe 31.

[0043] In this embodiment, the heating output pipe 20 is used to receive and discharge the heating medium or cooling medium output from the internal heating pipe 105. The temperature of the heating medium discharged from the internal heating pipe 105 is detected by the temperature detector I 21. When the temperature is close to T 热2 When the heating medium is transported to the high temperature supplement tank 3, if the temperature is lower than T 热2 When heated, it is transported to other places through a heating output branch pipe 23.

[0044] The high temperature output pipe 24 is used to receive and discharge the heating medium or cooling medium output from the inner high temperature channel 104; the temperature of the heating medium discharged from the inner high temperature channel 104 is detected by the temperature detector II 25. When the temperature is close to T 热3 The heating medium is transported to the insulation supplement tank 5. When the temperature is lower than T 热3 The heating medium is transported to other places through the high-temperature output branch pipe 27.

[0045] The heat preservation output pipe 28 is used to receive and discharge the heating medium or cooling medium output from the external low temperature channel 103; the temperature of the heating medium discharged from the internal and external low temperature channels 103 is detected by the temperature detector III 29, and when the temperature is close to T 冷1 The heating medium is transported to the low temperature compensation tank 9. When the temperature is higher than T 热4 The heating medium is transported to other places through the insulation output branch pipe 31.

[0046] By delivering the heating medium to the supplementary tank of the corresponding temperature according to the temperature, the energy consumption of heating the medium in the corresponding supplementary tank can be reduced, thereby improving the heat utilization rate. That is, under normal circumstances, only the heating supplementary tank 1 needs to be heated for a long time to keep the temperature at T 热4 The heating medium is transported to the heating supplement tank 1, and then the heating supplement tank 1 only needs to keep the heating medium warm or properly heat it to reach T 热1 The heating medium output from the heating replenishment tank 1 is cooled after heat exchange through the internal heating pipe 105. If the temperature of the heating medium after cooling is close to T 热2 Then the high temperature supplement tank 3 is input, so that the high temperature supplement tank 3 only needs to keep the heating medium warm or properly heat it to reach T 热2 That is, the heating medium of the corresponding temperature is output; the heating medium output from the high-temperature supplementary tank 3 is cooled after heat exchange through the internal high-temperature channel 104. If the temperature of the heating medium after cooling is close to T 热3 The heat preservation supplementary tank 5 is then inputted. By transporting the heating medium to the supplementary tank with a lower temperature requirement, the energy consumed by the corresponding supplementary tank for heating is reduced. The lower temperature medium is discharged into the low temperature compensation tank 9, which can also reduce the energy consumed by the low temperature compensation tank 9 for cooling.

[0047] The heating output valve 22, the high temperature output valve 26 and the heat preservation output valve 30 are all two-position three-way electric control valves.

[0048] Embodiment 8: This embodiment provides a production device for automobile seat cushions, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0049] Also includes: The heating branch valve 32 is connected to the other end of the heating output branch pipe 23, and the medium in the heating output branch pipe 23 is controlled by the heating branch valve 32 to enter the insulation supplement tank 5 or an insulation branch pipe 33; The insulation branch valve 34 is connected to the other end of the insulation branch pipe 33, and the medium in the insulation branch pipe 33 is controlled by the insulation branch valve 34 to enter the low-temperature compensation tank 9 or an insulation return pipe 35; The other end of the high-temperature output branch pipe 27 is connected to the middle of the insulation branch pipe 33, the other end of the insulation output branch pipe 31 is connected to the middle of the insulation return pipe 35, and the end of the insulation return pipe 35 is connected to the heating compensation tank 11.

[0050] In order to better classify and discharge the medium transported into the insulation branch pipe 33 , a temperature detector IV 36 is provided at one end of the insulation branch pipe 33 close to the insulation branch valve 34 .

[0051] In this embodiment, the heating branch valve 32 is arranged when the temperature of the heating medium discharged from the internal heating pipe 105 detected by the temperature detector I21 is lower than T 热2 But close to T 热3 When the temperature is lower than T 热3 When entering the insulation branch pipe 33.

[0052] The insulation branch valve 34 is set to the temperature detector IV 36 to detect that the temperature of the medium discharged from the insulation branch pipe 33 is close to T 冷1时 Discharge the medium to the low temperature compensation tank 9. When the temperature is at T 冷1 With T 热3 The medium is transported to the heating compensation tank 11 during the heating.

[0053] The heating branch valve 32 and the insulation branch valve 34 are both two-position three-way electrically controlled valves. Through the arrangement of the heating branch valve 32 and the insulation branch valve 34, the medium discharged from the heating output branch pipe 23 can be transported to the heating compensation tank and the low-temperature compensation tank according to the temperature classification, thereby reducing the energy consumed by the heating compensation tank and the low-temperature compensation tank for heating or cooling the medium.

[0054] Embodiment 9: This embodiment provides a production device for automobile seat cushions, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0055] Also includes: The insulation buffer pipe 37 has one end connected to the low temperature supplement pipe 8 and the other end connected to the inlet end of the external low temperature channel 103, and an insulation control valve 38 is provided at one end close to the low temperature supplement pipe 8, and an insulation regulating valve 39 is provided at one end close to the external low temperature channel 103; A high-temperature buffer pipe 40, one end of which is connected to the low-temperature supplementary pipe 8, and the other end of which is connected to a high-temperature receiving pipe 41, and a high-temperature control valve 42 is provided at one end close to the low-temperature supplementary pipe 8, and a high-temperature regulating valve 43 is provided at one end close to the high-temperature receiving pipe 41; A heating buffer pipe 44 is connected to the low temperature supplementary pipe 8 at one end and to a heating receiving pipe 45 at the other end. A heating control valve 46 is provided at one end close to the low temperature supplementary pipe 8 and a heating regulating valve 47 is provided at one end close to the heating receiving pipe 45. The medium in the high-temperature receiving tube 41 can eventually enter the internal high-temperature channel 104 , and the medium in the heating receiving tube 45 can eventually enter the internal heating pipeline 105 .

[0056] In this embodiment, the heat preservation buffer tube 37 can better input the cooling medium in the low temperature supplement tank 7 into the outer low temperature channel 103; the high temperature buffer tube 40 can better transport the cooling medium in the low temperature supplement tank 7 to the inner high temperature channel 104; the heating buffer tube 44 can transport the cooling medium to the inner heating pipe 105; thereby better transporting the cooling medium to the outer low temperature channel 103, the inner high temperature channel 104 and the inner heating pipe 105, so as to cool the upper mold plate 102 and the lower mold plate 101 well and timely, improve the cooling efficiency of the seat cushion body after molding, and thus shorten the production cycle. Among them, the heat preservation control valve 38, the high temperature control valve 42 and the heating control valve 46 are all electromagnetic shut-off valves; the heat preservation regulating valve 39, the high temperature regulating valve 43 and the heating regulating valve 47 are all electromagnetic regulating valves.

[0057] Embodiment 10: This embodiment provides a production device for automobile seat cushions, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0058] Also includes: The insulation delivery main pipe 48 has one end connected to the outlet end of the insulation supplement pipe 6, and the other end connected to the inlet end of the outer low-temperature channel 103 on the upper mold plate 102 and the lower mold plate 101, and the end close to the insulation supplement pipe 6 is provided with an insulation delivery main valve 49; The insulation delivery branch pipe 50 has one end connected to the outlet end of the insulation supplementary pipe 6 and the other end connected to the high-temperature receiving pipe 41, and has an insulation delivery branch valve 51 at one end close to the insulation supplementary pipe 6 and an insulation output branch valve 52 at one end close to the high-temperature receiving pipe 41; The high-temperature delivery main pipe 53 has one end connected to the outlet end of the high-temperature supplementary pipe 4, and the other end connected to the inlet end of the inner high-temperature channel 104 on the upper mold plate 102 and the lower mold plate 101, and a high-temperature output main valve is provided at the end close to the high-temperature supplementary pipe 4; A high-temperature delivery branch pipe 55, one end of which is connected to the outlet end of the high-temperature supplementary pipe 4, and the other end is connected to the heating receiving pipe 45, and a high-temperature delivery branch valve 56 is provided on the end close to the high-temperature supplementary pipe 4, and a high-temperature branch valve is provided on the end close to the heating receiving pipe 45; One end of the high-temperature receiving pipe 41 is connected to the high-temperature buffer pipe 40 and the insulation delivery branch pipe 50, and the other end is connected to the high-temperature delivery main pipe 53 on the side of the internal high-temperature channel 104 of the upper template 102 and the lower template 101, and a high-temperature cooling valve 59 is arranged at this end; one end of the heating receiving pipe 45 is connected to the heating buffer pipe 44 and the high-temperature delivery branch pipe 55, and the other end is connected to the heating supplementary pipe 2 on the side of the inlet end of the internal heating pipeline 105, and a heating cooling valve 60 is arranged at this end; and a heating delivery valve 58 is arranged on the side of the heating supplementary pipe 2 away from the inlet end of the internal heating pipeline 105.

[0059] In this embodiment, the heat preservation delivery main pipe 48 is mainly used to deliver cooling or heating medium to the external low-temperature channel 103; and the heat preservation delivery branch pipe 50 is mainly used to deliver the temperature T into the internal high-temperature channel 104. 热3 and the high temperature delivery main pipe 53 is used to deliver cooling or heating medium to the inner high temperature channel 104, and the high temperature delivery branch pipe 55 is mainly used to deliver the temperature of the inner heating pipe 105 to T 热2 The high temperature receiving pipe 41 is mainly used to cool the temperature of T 热3 Heating medium and temperature T 冷1 The cooling medium is transported to the internal heating pipe 105 as a cooling source; and the heating receiving pipe 45 mainly transfers the temperature T 热2 Heating medium and temperature T 冷1 The cooling medium is delivered to the internal heating pipe 105 as a cooling source.

[0060] In the cooling process of press molding, the temperature is first 热2 The heating medium is transported to the internal heating pipe 105, and the temperature is T 热3 The heating medium is transported to the inner high temperature channel 104, and the temperature is reduced to T 热3 The flow rate of the heating medium input into the outer low temperature channel is used to initially cool the upper template 102 and the lower template 101; then the temperature T is gradually transported to the inner heating pipeline 105, the inner high temperature channel 104 and the outer low temperature channel. 冷1 The cooling medium of different proportions and temperature T is added to the inner heating pipe 105. 热2 Heating medium and T 冷1 The cooling medium is added to the inner high temperature channel 104 in different proportions. 热3 Heating medium T 冷1 The heating medium is added to the outer low temperature channel in different proportions. 热3 Heating medium T冷1 The heating medium causes the upper template 102 and the lower template 101 to undergo secondary cooling. During the secondary cooling process, the heating medium entering the inner high-temperature channel 104, the inner heating pipe 105 and the outer low-temperature channel will be reduced until the transportation is completely stopped; finally, the inner high-temperature channel 104, the inner heating pipe 105 and the outer low-temperature channel are respectively transported with a temperature of T 冷1 The cooling medium is used to cool the upper template 102 and the lower template 101 for the final cooling; through three cooling stages, the lower template 101 and the upper template 102 can be gradually cooled in a step-by-step manner, compared with directly transporting the temperature of T to the inner high-temperature channel 104, the inner heating pipe 105 and the outer low-temperature channel 冷1 Using cooling medium to cool down can better protect the equipment and ensure the quality of the produced seat cushion body.

[0061] Among them, the insulated delivery main valve 49, the insulated output branch valve 52, the high-temperature output main valve, the high-temperature branch valve, the heating delivery valve 58, the high-temperature cooling valve 59 and the heating cooling valve 60 are all electromagnetic flow regulating valves; and the insulated delivery branch valve 51 and the high-temperature delivery branch valve 56 are electromagnetic stop valves.

[0062] At the same time, the internal temperature control system can control the temperature of multiple production equipment, such as Figure 4 Shown is a schematic diagram of the structure of the internal temperature control system for controlling the temperature of two production equipment.

[0063] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A method for producing a car seat cushion, characterized in that: The following steps are involved: Step 1: Mixing raw materials: adding raw materials in proportion into a stirring device for constant temperature stirring and mixing; Step 2: Leveling and cutting: pour out the mixed material and flatten it into a thick sheet of a certain thickness through a machine, and then cut it into several blanks of the same size and weight; Step 3, preheating the blank and baking and softening the blank; Step 4: extrusion molding, putting the baked and softened blank into the production equipment for compression molding to obtain the cushion body; The blank is heated, kept warm and cooled during the pressing process to obtain the cushion body.

2. A production equipment suitable for the automobile seat cushion production method according to claim 1, characterized in that: include: A frame (100) having an upper support plate and a lower base, wherein a support rod is provided between the upper support plate and the lower base; A lower mold plate (101) is arranged on the lower base and has a lower molding surface formed on its upper end; An upper mold plate (102) is arranged on the support rod and has an upper molding surface formed at its lower end; A driving mechanism is arranged at the upper end of the upper support plate, and the driving end is connected to the upper template (102) so as to drive the upper template (102) to move up and down; An internal temperature control system, used to control the temperature of the lower mold plate (101) and the upper mold plate (102); The internal temperature control system includes: Internal temperature-controlled flow channels are formed in the lower mold plate (101) and the upper mold plate (102) respectively; The external temperature control circuit is connected with the internal temperature control flow channel.

3. The production equipment according to claim 2, characterized in that: The internal temperature control flow channel comprises: An external low-temperature channel (103) is formed in the upper template (102) or the lower template (101), distributed along the outer edge of the upper template (102) or the lower template (101), and has two ends extending from the side wall of the upper template (102) or the lower template; An inner high-temperature channel (104) is formed in the upper template (102) or the lower template (101) and is located inside the outer low-temperature channel (103), with two ends extending from the side wall of the lower template (101) or the upper template (102) respectively; The internal heating pipe (105) is arranged in the internal high-temperature channel (104), and two ends thereof extend out from the side wall of the lower mold plate (101) or the upper mold plate (102) respectively.

4. The production equipment according to claim 3, characterized in that: The internal temperature control flow channel also includes: Internal heating wires (106), a plurality of the internal heating wires (106) are arranged in the internal heating pipe (105).

5. The production equipment according to claim 3, characterized in that: The external temperature control circuit comprises: A heating replenishment tank (1), the outlet end of which is connected to the inlet end of the internal heating pipeline (105) via a heating replenishment pipe (2); A high-temperature supplement tank (3), the outlet end of which can be connected to the inlet end of the inner high-temperature channel (104) via a high-temperature supplement pipe (4); The outlet end of the heat preservation supplement tank (5) can be connected to the inlet end of the external low-temperature channel (103) through the heat preservation supplement pipe (6); A low-temperature supplement tank (7), the outlet end of which can be connected to the inlet end of the inner heating pipeline (105), the inner high-temperature channel (104) and the outer low-temperature channel (103) through a low-temperature supplement pipe (8); A low-temperature compensation tank (9), the outlet end of which is connected to the inlet end of the low-temperature supplementary tank (7) via a low-temperature compensation pipe (10); The outlet end of the heating compensation tank (11) is connected to the inlet end of the heating supplement tank (1) through a heating compensation pipe (12).

6. The production equipment according to claim 5, characterized in that: Also includes: A heating supplementary pump (13) is arranged on the heating supplementary pipe (2); A high-temperature supplementary pump (14) is arranged on the high-temperature supplementary pipe (4); A thermal insulation supplementary pump (15) is arranged on the thermal insulation supplementary pipe (6); A low temperature compensation pump (16), arranged on the low temperature compensation tube (10); A supplementary cryogenic pump group, arranged on the cryogenic supplementary pipe (8); The heating compensation pump (17) is arranged on the heating compensation pipe (12).

7. The production equipment according to claim 6, characterized in that: Also includes: A heating output pipe (20) having one end connected to the outlet end of the internal heating pipeline (105) and a heating output valve (22) provided at the other end, and the heating output valve (22) controls the medium in the internal heating output pipe (20) to enter the high-temperature supplementary tank (3) or a heating output branch pipe (23); A high-temperature output pipe (24), one end of which is connected to the outlet end of the inner high-temperature channel (104), and the other end of which is provided with a high-temperature output valve (26), through which the medium in the high-temperature output pipe (24) is controlled to enter the heat preservation supplementary tank (5) or a high-temperature output branch pipe (27); The insulation output pipe (28) has one end connected to the outlet end of the external low-temperature channel (103) and the other end is provided with an insulation output valve (30). The insulation output valve (30) controls the medium in the insulation output pipe (28) to enter the low-temperature compensation tank (9) or an insulation output branch pipe (31).

8. The production equipment according to claim 7, characterized in that: Also includes: A heating branch valve (32) is connected to the other end of the heating output branch pipe (23), and controls the medium in the heating output branch pipe (23) to enter the insulation supplement tank (5) or an insulation branch pipe (33) through the heating branch valve (32); The insulation branch valve (34) is connected to the other end of the insulation branch pipe (33), and controls the medium in the insulation branch pipe (33) to enter the low-temperature compensation tank (9) or an insulation return pipe (35) through the insulation branch valve (34).

9. The production equipment according to claim 8, characterized in that: Also includes: A heat-insulating buffer tube (37), one end of which is connected to the low-temperature supplementary tube (8), and the other end of which is connected to the inlet end of the external low-temperature channel (103); A high-temperature buffer tube (40), one end of which is connected to the low-temperature supplementary tube (8), and the other end of which is connected to a high-temperature receiving tube (41); A heating buffer tube (44), one end of which is connected to the low-temperature supplementary tube (8), and the other end of which is connected to a heating receiving tube (45); The medium in the high-temperature receiving tube (41) can eventually enter the internal high-temperature channel (104), and the medium in the heating receiving tube (45) can eventually enter the internal heating pipeline (105).

10. The production equipment according to claim 9, characterized in that Also includes: A heat preservation delivery main pipe (48), one end of which is connected to the outlet end of the heat preservation supplementary pipe (6), and the other end of which is connected to the inlet end of the external low-temperature channel (103) on the upper mold plate (102) and the lower mold plate (101); A heat preservation delivery branch pipe (50), one end of which is connected to the outlet end of the heat preservation supplementary pipe (6), and the other end of which is connected to the high-temperature receiving pipe (41); A high-temperature transport main pipe (53), one end of which is connected to the outlet end of the high-temperature supplementary pipe (4), and the other end of which is connected to the inlet ends of the internal high-temperature channels (104) on the upper mold plate (102) and the lower mold plate (101); The high-temperature delivery branch pipe (55) has one end connected to the outlet end of the high-temperature supplementary pipe (4) and the other end connected to the heating receiving pipe (45).

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