Equipment for producing large-diameter pipe fitting valve plastic product through mold pressing method

Abstract

The invention relates to the technical field of valve production, in particular to equipment for producing large-diameter pipe fitting valve plastic products through a mold pressing method. The equipment for producing the large-diameter pipe fitting valve plastic product through the mold pressing method comprises a feeding table, a sliding rail and a hydraulic machine, an extrusion mechanism is installed at the upper end of the feeding table, and the extrusion mechanism comprises an extrusion box and a stock bin; the sliding rail is located on one side of the feeding table, and a sliding table is installed on the sliding rail in a sliding mode. A temperature control box and a forming mold are installed at the upper end of the sliding table. A hydraulic machine is further arranged on one side of the sliding rail. A hydraulic assembly is installed at the upper end of the hydraulic machine. According to the equipment for producing the large-diameter pipe fitting valve plastic product through the mold pressing method, production raw materials can be extruded or poured into a forming mold cavity after being continuously plasticized in the extrusion mechanism, the raw material heating time is shortened, and the staying heating time of the production raw materials in an injection molding machine barrel is shortened; and due to continuous plasticizing, the injection molding amount of the production raw materials can be continuously increased without being limited.

Description

Technical Field

[0001] The invention relates to the technical field of valve production, in particular to equipment for producing large-diameter pipe fitting valve plastic products by a molding method. Background Art

[0002] Traditionally, large plastic pipes, valves and special-shaped parts are generally produced by large injection molding machines and matching molds. When producing these plastic components, the molten raw materials are generally injected into the matching molds under high pressure and high temperature by the injection molding machine for one-time cooling and molding.

[0003] This method is prone to the following defects. For example, 1. Due to the space limitation of the injection molding machine, the mold size must be able to fit into the space of the injection molding machine, which makes it impossible to design large-size product molds; 2. The injection volume of the injection molding machine cannot be increased indefinitely, which makes it impossible to produce larger-caliber pipes, valves, etc.; 3. When using large injection molding machines to produce large products, the product molding time is long, and the raw materials stay in the barrel for a long time after melting, resulting in a long heating time for the raw materials, which is very unfriendly to heat-sensitive materials (such as CPVC) and can easily cause them to burn and decompose, resulting in a decrease in product quality; this makes the entire production equipment not only expensive and investment-intensive, but also the utilization rate of the injection molding machine and mold is very low;

[0004] In view of the above problems in the background technology, the present invention aims to provide a device for producing large-diameter pipe fittings and valve plastic products by molding. Summary of the invention

[0005] The object of the present invention is to provide a device for producing large-diameter pipe fittings and valve plastic products by molding method, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A device for producing large-diameter pipe fittings and valve plastic products by a molding method, the device for producing large-diameter pipe fittings and valve plastic products by a molding method comprises:

[0008] A feeding table, a slide rail and a hydraulic press, wherein an extrusion mechanism is installed at the upper end of the feeding table, and the extrusion mechanism includes an extrusion box and a silo, an extrusion assembly is arranged inside the extrusion box, a driving assembly is installed on one side of the extrusion box, and the driving assembly is connected to the extrusion assembly; the silos are distributed on both sides of the upper end of the extrusion box, the bottom end of the silo is connected to the inside of the extrusion box, and a stirring assembly is installed inside the silo;

[0009] The slide rail is located on one side of the feed table, a slide table is slidably installed on the slide rail, a slide groove is provided at the lower end of the slide table, and the slide groove provided at the lower end of the slide table is limitedly slidably installed on the slide rail; a temperature control box and a forming mold are respectively installed at the upper end of the slide table, and one end of the temperature control box is connected to the inside of the forming mold through an air pipe;

[0010] A hydraulic press is also provided on one side of the slide rail, and a hydraulic assembly is installed on the upper end of the hydraulic press. The hydraulic assembly includes a hydraulic rod and a hydraulic mold.

[0011] As a further solution of the present invention: the stirring assembly includes an output motor, a rotating shaft, a scraper and a screw conveyor paddle, the lower end of the silo is connected to a discharge pipe, and the bottom end of the discharge pipe extends into the extrusion box; the upper end of the silo is equipped with an output motor, and the output end of the output motor is provided with a rotating shaft, a scraper is installed on the part of the rotating shaft located inside the silo, and a screw conveyor paddle is provided on the part of the rotating shaft located inside the discharge pipe.

[0012] As a further solution of the present invention: an extrusion cavity is formed inside the extrusion box, and the bottom end of the feed pipe is connected to the inside of the extrusion cavity; the extrusion assembly includes a spiral extrusion rod, on which a loose spiral extrusion section, a tight spiral extrusion section and a tight spiral extrusion section are respectively installed from left to right; one end of the spiral extrusion rod passes through the inner wall of the extrusion box and the rear end portion is connected to the driving assembly; the other end of the spiral extrusion rod is directly opposite to the extrusion end head, and the extrusion end head is connected to the outlet position of the extrusion cavity, and at the same time, the extrusion cavity is symmetrically equipped with hot air pipes at the upper and lower positions of the tight spiral extrusion section.

[0013] As a further solution of the present invention: the driving assembly includes an output motor, a driving wheel and an auxiliary wheel. The output motor is located on the feeding table. A driving wheel is provided at the output end of the output motor. An auxiliary wheel is provided at one end of the spiral extrusion rod. The outer side of the auxiliary wheel is connected to the outer side of the driving wheel by a conveyor belt.

[0014] As a further solution of the present invention: a roller is movably installed at the lower end of the slide, the roller is located inside the slide groove, and the roller is rollingly installed on the upper surface of the slide rail; an output component is installed at the lower end of the slide, and the output component is connected to the roller.

[0015] As a further solution of the present invention: the output component includes a bidirectional output motor, a transmission box and a roller shaft, the roller shaft passes through the roller axis, one end of the roller shaft extends into the transmission box, and a main bevel gear is provided on the part of the roller shaft extending into the transmission box; an output shaft is provided at the output end of the bidirectional output motor, and a side bevel gear is provided on the part of the output shaft extending into the transmission box, and the outer side of the side bevel gear is meshed with the outer side of the main bevel gear.

[0016] As a further solution of the present invention: a partition is installed at the middle position inside the temperature control box, a semiconductor heating plate is provided at the position of the partition, and one end of the semiconductor heating plate is electrically connected to the power board, and the power board is located outside the temperature control box; the partition is arranged to divide the interior of the temperature control box into a heating chamber and a refrigeration chamber, one end of the heating chamber and one end of the refrigeration chamber are both provided with fans, and the other end of the heating chamber and the other end of the refrigeration chamber are both provided with filters.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] Compared with the current method of combining injection molding machines with matching molds, the equipment for producing large-diameter pipe fittings and valve plastic products by the molding method has the following advantages:

[0019] 1. Through the cooperation of the extrusion mechanism installed on the feed table, the molding die installed on the slide table, the temperature control box arranged on one side of the molding die, and the hydraulic press arranged on one side of the slide rail, the production raw materials can be continuously plasticized inside the extrusion mechanism and then extruded or poured into the molding die cavity, thereby reducing the heating time of the raw materials and the residence and heating time of the production raw materials in the injection molding machine barrel; and because of the continuous plasticization, the injection volume of the production raw materials can be continuously increased without restriction;

[0020] Second, since the molding mold can freely enter the workbench of the hydraulic press, a large-size hydraulic press can be customized according to the mold size, which solves the problem that the injection molding machine cannot put in large molds;

[0021] 3. The temperature control box is used to pass hot air into the molding mold to maintain the state of the liquid raw material or pass cold air into the molding mold according to the state of the liquid raw material inside the molding mold, so that the liquid raw material inside the molding mold can be cooled and formed, simplifying the structure of passing hot air or cold air into the air intake pipe while accelerating the production efficiency of injection molding products. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention.

[0023] Figure 1 The present invention is a schematic structural diagram of an apparatus for producing large-diameter pipe fittings and valve plastic products by a molding method according to an embodiment of the present invention.

[0024] Figure 2 The present invention is a schematic structural diagram of an extrusion mechanism of an apparatus for producing large-diameter pipe fittings and valve plastic products by a molding method according to an embodiment of the present invention.

[0025] Figure 3The present invention is a side view of a slide of an apparatus for producing large-diameter pipe fittings and valve plastic products by a molding method according to an embodiment of the present invention.

[0026] Figure 4 The present invention is a schematic diagram of the operation principle of a slide table of an apparatus for producing large-diameter pipe fittings and valve plastic products by a molding method according to an embodiment of the present invention.

[0027] Figure 5 The present invention is a schematic structural diagram of a temperature control box for equipment for producing large-diameter pipe fittings and valve plastic products by a molding method according to an embodiment of the present invention.

[0028] Figure 6 The present invention is a schematic structural diagram of a semiconductor heating plate of a temperature control box of an apparatus for producing large-diameter pipe fittings and valve plastic products by a molding method according to an embodiment of the present invention.

[0029] Figure 7 The present invention is a schematic diagram of the circuit operation of a temperature control box of an apparatus for producing large-diameter pipe fittings and valve plastic products by a molding method according to an embodiment of the present invention.

[0030] In the figure: 1-feeding table, 2-driving wheel, 3-conveyor belt, 4-auxiliary driving wheel, 5-extrusion box, 6-bin, 7-slide rail, 8-molding mold, 9-temperature control box, 10-slide table, 11-slideway, 12-hydraulic press, 13-hydraulic rod, 14-hydraulic mold, 15-output motor, 16-rotating shaft, 17-scraper, 18-screw conveyor paddle, 19-feeding pipe, 20-extrusion chamber, 21-screw extrusion rod, 22-loose screw extrusion section, 23-tight screw extrusion section, 24 -tight spiral extrusion section, 25-hot air pipe, 26-extrusion end, 27-roller, 28-roller shaft, 29-transmission box, 30-main bevel gear, 31-side bevel gear, 32-output shaft, 33-heating chamber, 34-fan, 35-semiconductor heating plate, 36-filter, 37-power board, 38-refrigeration chamber, 39-semiconductor material board A, 40-semiconductor material board B, 41-control circuit board, 42-temperature sensor, 43-transformer rectifier, 44-transformer. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] Example

[0033] See also Figure 1 , an apparatus for producing large-diameter pipe fittings and valve plastic products by molding method provided in an embodiment of the present invention, the apparatus for producing large-diameter pipe fittings and valve plastic products by molding method comprises:

[0034] A feeding table 1, a slide rail 7 and a hydraulic press 12, wherein an extrusion mechanism is installed at the upper end of the feeding table 1, and the installed extrusion mechanism is used to perform spiral extrusion, shearing and hot melting of the solid raw materials to convert them into liquid raw materials in a molten state; the extrusion mechanism includes an extrusion box 5 and a silo 6, and an extrusion assembly is provided inside the extrusion box 5, and a driving assembly is installed on one side of the extrusion box 5, and the driving assembly is connected to the extrusion assembly to drive the extrusion assembly to operate, so as to realize spiral extrusion and shearing of the production raw materials inside the extrusion box 5; the silos 6 are distributed on both sides of the upper end of the extrusion box 5, and the bottom end of the silo 6 is connected to the inside of the extrusion box 5, and the silo 6 is used to quantitatively transport the production raw materials inside the extrusion box 5; a stirring assembly is installed inside the silo 6, and the stirring assembly is used to stir and mix the production raw materials inside the silo 6 and realize quantitative feeding;

[0035] The slide rail 7 is located on one side of the feed table 1, and a slide table 10 is slidably installed on the slide rail 7. A slide groove 11 is provided at the lower end of the slide table 10, and the slide groove 11 provided at the lower end of the slide table 10 is limitedly slidably installed on the slide rail 7; a temperature control box 9 and a molding die 8 are respectively installed on the upper end of the slide table 10, and one end of the temperature control box 9 is connected to the inside of the molding die 8 through an air pipe; the molding die 8 is used to carry the molten liquid raw material discharged from the outlet position of the extrusion box 5, and the temperature control box 9 is used to pass hot air into the molding die 8 to maintain the state of the liquid raw material or pass cold air into the molding die 8 according to the state of the liquid raw material inside the molding die 8, so that the liquid raw material inside the molding die 8 is cooled and formed;

[0036] A hydraulic press 12 is also provided on one side of the slide rail 7. A hydraulic assembly is installed on the upper end of the hydraulic press 12. The hydraulic assembly includes a hydraulic rod 13 and a hydraulic die 14. The hydraulic assembly is used to compress, exhaust and re-compress the liquid raw material inside the molding die 8 according to a set process until the product meets the set requirements;

[0037] In the embodiment of the present invention, when the device for producing large-diameter pipe fittings and valve plastic products by the molding method is used, the weighed production raw materials are put into the internal position of the silo 6, and the stirring assembly arranged inside the silo 6 is used to stir and mix the put-in raw materials and quantitatively transport the raw materials to the inside of the extrusion box 5;

[0038] After the raw materials enter the extrusion box 5, the driving component is started, and the driving component operates to output kinetic energy to drive the extrusion component to operate. When the extrusion component operates, the incoming production raw materials can be extruded and sheared, and at the same time, the hot air introduced cooperates to achieve the melting of the production raw materials. Finally, the production raw materials become liquid and are discharged from the outlet position of the extrusion box 5 into the molding die 8;

[0039] After the liquid raw material enters the molding die 8, the temperature control box 9 is started, and high-temperature hot air is introduced into the molding die 8 through the set temperature control box 9 to maintain the state of the liquid raw material inside the molding die 8; then the slide 10 is started, and the slide 10 slides and moves along the slide rail 7 to the position of the hydraulic component installed on the upper end of the hydraulic press 12. The set hydraulic component is operated to compress, exhaust and re-compress the liquid raw material inside the molding die 8 according to the set process until the product meets the set requirements, and then the temperature control box 9 is started again. The temperature control box 9 operates to transport cold air into the molding die 8 to cool and shape the molded product. After the set cooling time is reached, the hydraulic component installed on the hydraulic press 12 opens the mold, and the slide 10 operates to remove the molding die 8 from the hydraulic press 12. The manipulator takes out the molded product from the molding die 8, and then enters the next production cycle;

[0040] See also Figure 2 In one embodiment of the present invention, the stirring assembly includes an output motor 15, a rotating shaft 16, a scraper 17 and a screw conveyor paddle 18. The lower end of the silo 6 is connected to a discharge pipe 19, and the bottom end of the discharge pipe 19 extends into the extrusion box 5. The upper end of the silo 6 is equipped with an output motor 15, and the output end of the output motor 15 is provided with a rotating shaft 16. The scraper 17 is installed on the part of the rotating shaft 16 located inside the silo 6, and the screw conveyor paddle 18 is installed on the part of the rotating shaft 16 located inside the discharge pipe 19.

[0041] In the embodiment of the present invention, when the stirring assembly is used to stir and mix the production raw materials put into the silo 6, the output motor 15 is started, and the output kinetic energy of the output motor 15 drives the rotating shaft 16 to rotate. When the rotating shaft 16 rotates, the scraper 17 and the screw conveyor paddle 18 installed on the rotating shaft 16 are driven to rotate at the same time. When the scraper 17 rotates, the input raw materials can be stirred and mixed, and the production raw materials attached to the inner wall of the silo 6 can be scraped and cleaned; and when the screw conveyor paddle 18 rotates, the raw materials inside the silo 6 can be quantitatively transported, and a solenoid valve is installed at the position of the discharge pipe 19 to control the opening state of the discharge pipe 19;

[0042] In one embodiment of the present invention, an extrusion chamber 20 is formed inside the extrusion box 5, and the bottom end of the feed pipe 19 is connected to the inside of the extrusion chamber 20; an extrusion assembly is arranged inside the extrusion chamber 20; the extrusion assembly comprises a spiral extrusion rod 21, on which a loose spiral extrusion section 22, a tight spiral extrusion section 23 and a tight spiral extrusion section 24 are respectively installed from left to right; one end of the spiral extrusion rod 21 passes through the inner wall of the extrusion box 5, and the rear end portion is connected to the driving assembly; the other end of the spiral extrusion rod 21 is directly opposite to the extrusion end head 26, and the extrusion end head 26 is connected to the outlet position of the extrusion chamber 20, and at the same time, the extrusion chamber 20 is symmetrically installed with hot air pipes 25 at the upper and lower positions of the tight spiral extrusion section 24;

[0043] In the embodiment of the present invention, when the extrusion assembly is operated by starting the driving assembly to perform spiral extrusion shearing on the production raw materials entering the extrusion chamber 20, after the driving assembly outputs kinetic energy, the spiral extrusion rod 21 of the extrusion assembly rotates, and when the spiral extrusion rod 21 rotates, the loose spiral extrusion section 22, the tight spiral extrusion section 23 and the tight spiral extrusion section 24 installed on the spiral extrusion rod 21 are driven to rotate at the same time. When the loose spiral extrusion section 22, the tight spiral extrusion section 23 and the tight spiral extrusion section 24 rotate at the same time, the raw materials entering the extrusion chamber 20 are spirally extruded and transported, and as the spiral sections are denser, the shearing force is increased. In the later stage, the high-temperature gas introduced by the hot air pipe 25 can be used to melt the transported raw materials, and finally pushed out from the position of the extrusion end 26 into the molding die 8;

[0044] See also Figure 1 and Figure 2 In one embodiment of the present invention, the driving assembly includes an output motor 15, a driving wheel 2 and an auxiliary driving wheel 4. The output motor 15 is located on the feed table 1. The output end of the output motor 15 is provided with a driving wheel 2. One end of the spiral extrusion rod 21 is provided with an auxiliary driving wheel 4. The outer side of the auxiliary driving wheel 4 is connected to the outer side of the driving wheel 2 through a conveyor belt 3.

[0045] In the embodiment of the present invention, when the driving assembly is started to drive the extrusion assembly to operate, the output motor 15 is started, and the output motor 15 outputs kinetic energy to drive the driving wheel 2 to rotate. Since the outer side of the driving wheel 2 is connected to the outer side of the auxiliary driving wheel 4 through the conveyor belt 3, when the driving wheel 2 rotates, the auxiliary driving wheel 4 is driven to rotate at the same time through the provided conveyor belt 3, and when the auxiliary driving wheel 4 rotates, the spiral extrusion rod 21 of the extrusion assembly is driven to rotate;

[0046] See also Figure 3 and Figure 4In one embodiment of the present invention, a roller 27 is movably mounted at the lower end of the slide 10, the roller 27 is located inside the slide groove 11, and the roller 27 is rollingly mounted on the upper end surface of the slide rail 7;

[0047] An output assembly is installed at the lower end of the slide 10, and the output assembly is connected to the roller 27. When the output assembly outputs kinetic energy, the roller 27 can be pushed to roll along the upper surface of the slide rail 7 to achieve sliding displacement of the slide 10 on the slide rail 7.

[0048] Specifically, the output assembly includes a bidirectional output motor, a transmission box 29 and a roller shaft 28. The roller shaft 28 passes through the axis of the roller 27. One end of the roller shaft 28 extends into the transmission box 29. A main bevel gear 30 is provided on the portion of the roller shaft 28 extending into the transmission box 29. An output shaft 32 is provided at the output end of the bidirectional output motor. A side bevel gear 31 is provided on the portion of the output shaft 32 extending into the transmission box 29. The outer side of the side bevel gear 31 is meshed with the outer side of the main bevel gear 30.

[0049] In the embodiment of the present invention, when the output assembly is used to push the roller 27 to roll along the upper end of the slide rail 7, the bidirectional output motor is started to output kinetic energy to drive the output shaft 32 to rotate. When the output shaft 32 rotates, the side bevel gear 31 is driven to rotate. Since the outer side of the side bevel gear 31 is meshed with the outer side of the main bevel gear 30, when the side bevel gear 31 rotates, the main bevel gear 30 is driven to rotate, and then the roller shaft 28 is driven to rotate, and finally the roller 27 installed on the roller shaft 28 is rotated;

[0050] See also Figure 5 and Figure 7 In one embodiment of the present invention, a partition is installed at the middle position inside the temperature control box 9, and a semiconductor heating plate 35 is provided at the position of the partition. At the same time, one end of the semiconductor heating plate 35 is electrically connected to a power board 37, and the power board 37 is located outside the temperature control box 9; the partition is arranged to divide the interior of the temperature control box 9 into a heating chamber 33 and a refrigeration chamber 38, and a fan 34 is provided at one end of the heating chamber 33 and one end of the refrigeration chamber 38, and a filter 36 is installed at the other end of the heating chamber 33 and the other end of the refrigeration chamber 38;

[0051] In the embodiment of the present invention, after the semiconductor heating plate 35 is powered on by the power board 37, the semiconductor heating plate 35 performs cooling inside the refrigeration chamber 38 and performs heating inside the heating chamber 33; according to the actual situation, the natural wind from the outside is introduced to perform heating or cooling after filtering and dust removal, and becomes hot air or cold air and is transported to the inside of the molding mold 8 through the running fan 34;

[0052] Specifically, please refer to the slide rail 7 in FIG. The circuit adapted to the semiconductor heating plate 35 includes a control circuit board 41, a temperature sensor 42, a transformer 44 and a transformer rectifier 43. After the external current is drawn into the mold through the power board 37, the hot air or cold air is controlled to be delivered to the mold 8 according to the temperature state of the raw material inside the molding mold 8 detected by the temperature sensor 42; after the external current is introduced, it is boosted by the transformer 44 and then rectified by the transformer rectifier 43 into direct current and then delivered to the semiconductor heating plate 35, so that the semiconductor heating plate 35 performs the Peltier effect; then the air blower 34 is started to deliver the hot air or cold air to the molding mold 8, so as to keep the raw material inside the molding mold 8 in a liquid state or to cool and shape the molded product inside the molding mold 8;

[0053] Furthermore, the semiconductor heating plate 35 includes a semiconductor material plate A39 and a semiconductor material plate B40, and the semiconductor material plate A39 and the semiconductor material plate B40 are mounted together; and one end of the semiconductor material plate A39 and one end of the semiconductor material plate B40 are both electrically connected to the power board 37 through a wire;

[0054] After the DC power is connected through the power board 37, it is transmitted to the semiconductor material board A39 and the semiconductor material board B40 respectively, so that the semiconductor material board A39 and the semiconductor material board B40 respectively perform cooling on one side or heating on the other side;

[0055] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for producing large-diameter pipe fittings and valve plastic products by molding, comprising: The feed table (1), the slide rail (7) and the hydraulic press (12) are characterized by: An extrusion mechanism is installed at the upper end of the feed table (1), and the extrusion mechanism includes an extrusion box (5) and a silo (6). An extrusion assembly is provided inside the extrusion box (5), and a drive assembly is installed on one side of the extrusion box (5), and the drive assembly is connected to the extrusion assembly; the silo (6) is distributed on both sides of the upper end of the extrusion box (5), and the bottom end of the silo (6) is connected to the inside of the extrusion box (5), and a stirring assembly is installed inside the silo (6); The slide rail (7) is located on one side of the feed table (1), a slide table (10) is slidably mounted on the slide rail (7), a slide groove (11) is provided at the lower end of the slide table (10), and the slide groove (11) provided at the lower end of the slide table (10) is limitedly slidably mounted on the slide rail (7); a temperature control box (9) and a molding die (8) are respectively installed at the upper end of the slide table (10), and one end of the temperature control box (9) is connected to the inside of the molding die (8) through an air pipe; A hydraulic press (12) is also provided on one side of the slide rail (7). A hydraulic assembly is installed on the upper end of the hydraulic press (12). The hydraulic assembly includes a hydraulic rod (13) and a hydraulic die (14).

2. The equipment for producing large-diameter pipe fittings and valve plastic products by molding method according to claim 1 is characterized in that: The stirring assembly comprises an output motor (15), a rotating shaft (16), a scraper (17) and a screw conveying paddle (18); the lower end of the silo (6) is connected to a discharge pipe (19), and the bottom end of the discharge pipe (19) extends into the interior of the extrusion box (5); the upper end of the silo (6) is equipped with an output motor (15), the output end of the output motor (15) is provided with a rotating shaft (16), the portion of the rotating shaft (16) located inside the silo (6) is equipped with a scraper (17), and the portion of the rotating shaft (16) located inside the discharge pipe (19) is provided with a screw conveying paddle (18).

3. The equipment for producing large-diameter pipe fittings and valve plastic products by molding method according to claim 1 is characterized in that: An extrusion chamber (20) is formed inside the extrusion box (5), and the bottom end of the feed pipe (19) is connected to the inside of the extrusion chamber (20); the extrusion assembly comprises a spiral extrusion rod (21), and a loose spiral extrusion section (22), a tight spiral extrusion section (23) and a tight spiral extrusion section (24) are respectively installed on the spiral extrusion rod (21) from left to right; one end of the spiral extrusion rod (21) passes through the inner wall of the extrusion box (5) and the rear end portion is connected to the driving assembly; the other end of the spiral extrusion rod (21) faces the extrusion end head (26), and the extrusion end head (26) is connected to the outlet position of the extrusion chamber (20), and at the same time, the extrusion chamber (20) is symmetrically installed with hot air pipes (25) at the upper and lower positions of the tight spiral extrusion section (24).

4. The equipment for producing large-diameter pipe fittings and valve plastic products by molding method according to claim 3 is characterized in that: The driving assembly comprises an output motor (15), a driving wheel (2) and an auxiliary driving wheel (4); the output motor (15) is located on the feed platform (1); the output end of the output motor (15) is provided with a driving wheel (2); one end of the spiral extrusion rod (21) is provided with an auxiliary driving wheel (4); the outer side of the auxiliary driving wheel (4) is connected to the outer side of the driving wheel (2) via a conveyor belt (3).

5. The equipment for producing large-diameter pipe fittings and valve plastic products by molding method according to claim 1, characterized in that: A roller (27) is movably mounted at the lower end of the slide (10), the roller (27) is located inside the slide groove (11), and the roller (27) is rollingly mounted on the upper end surface of the slide rail (7); an output component is mounted at the lower end of the slide (10), and the output component is connected to the roller (27).

6. The equipment for producing large-diameter pipe fittings and valve plastic products by molding method according to claim 5 is characterized in that: The output assembly comprises a bidirectional output motor, a transmission box (29) and a roller shaft (28); the roller shaft (28) passes through the axis of the roller (27); one end of the roller shaft (28) extends into the transmission box (29); a main bevel gear (30) is provided on the portion of the roller shaft (28) extending into the transmission box (29); an output shaft (32) is provided at the output end of the bidirectional output motor; a side bevel gear (31) is provided on the portion of the output shaft (32) extending into the transmission box (29); the outer side of the side bevel gear (31) is meshed with the outer side of the main bevel gear (30).

7. The equipment for producing large-diameter pipe fittings and valve plastic products by molding method according to claim 1 is characterized in that: A partition is installed at the middle position inside the temperature control box (9), and a semiconductor heating plate (35) is provided at the position of the partition. At the same time, one end of the semiconductor heating plate (35) is electrically connected to a power board (37), and the power board (37) is located outside the temperature control box (9); the partition is arranged so that the interior of the temperature control box (9) is divided into a heating chamber (33) and a refrigeration chamber (38), and a fan (34) is provided at one end of the heating chamber (33) and one end of the refrigeration chamber (38), and a filter (36) is installed at the other end of the heating chamber (33) and the other end of the refrigeration chamber (38).

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