Quantitative feeding device for compression molding machine

Abstract

The invention relates to the technical field of quantitative feeding, in particular to a quantitative feeding device for a compression molding machine. Comprising a base and a quantitative shunting block, a material channel is arranged in the quantitative shunting block, the feeding end of the material channel is connected with a feeding mechanism, the discharging end of the material channel is connected with a discharging mechanism, the discharging mechanism is provided with a discharging valve, and the top of the quantitative shunting block is provided with a quantitative tank and a buffer tank which are communicated with the material channel; a first driving hydraulic cylinder and a second driving hydraulic cylinder are respectively arranged at the tops of the quantitative tank and the buffer tank; the steering hydraulic cylinder is used for controlling the mandrel to enter and exit from the through hole and controlling the flowing direction of materials in the material channel, so that the materials enter the quantitative tank to be quantified or enter the buffer tank to be temporarily stored, non-stop feeding can be achieved, and abrasion to equipment is reduced; the ascending height and the descending height of the first extrusion plate are determined through the electronic measuring scale, so that the volume of materials in the quantitative tank is ensured to be constant, precise quantitative feeding is realized, and the stability of product quality is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of quantitative feeding, and in particular to a quantitative feeding device for a compression molding machine. Background Art

[0002] A compression molding machine is a device used for plastic molding. It is mainly used to heat and melt plastic particles and then plasticize them into shape through pressure.

[0003] When a plastic pallet is formed by an injection molding machine, it is necessary to transfer the heat-treated plastic to the lower mold of the injection molding machine for molding through a feeding and transmission device. The feeding and transmission device in the prior art achieves the purpose of quantitative feeding by stopping and intermittently feeding. That is, after the feeding and transmission device transfers a certain amount of heat-treated plastic to the lower mold of the injection molding machine, the feeding and transmission device needs to stop feeding, wait for the pallet on the lower mold to be cooled and formed and then taken out, and then start the feeding and transmission device to continue feeding into the lower mold of the injection molding machine. After the feeding and transmission device is stopped, the material inside it is not completely discharged, and the heat-treated material may solidify due to a long period of residence, resulting in blockage during transportation, resulting in unstable material supply, affecting the stability of product quality, and frequent shutdowns and starts will also lead to reduced production efficiency and increased wear on equipment. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a quantitative feeding device for a compression molding machine, which can ensure the consistency of raw material dosage for each product by accurately feeding materials without stopping the machine, thereby avoiding the stability of product quality affected by feeding interruptions.

[0005] To achieve the above technical objectives, the present invention proposes the following technical solutions: a quantitative feeding device for a compression molding machine, comprising a base and a quantitative diverter block, a material channel is arranged in the quantitative diverter block, the feed end of the material channel is connected to a feeding mechanism, the discharge end of the material channel is connected to a discharge mechanism, a discharge valve is arranged on the discharge mechanism, a quantitative tank and a buffer tank connected to the material channel are arranged on the top of the quantitative diverter block, a first driving hydraulic cylinder and a second driving hydraulic cylinder are arranged on the top of the quantitative tank and the buffer tank respectively, the first driving hydraulic cylinder is connected to a first extrusion plate slidably connected to the inner wall of the quantitative tank through a first connecting rod, the second driving hydraulic cylinder is connected to a second extrusion plate slidably connected to the inner wall of the buffer tank through a second connecting rod, a steering hydraulic cylinder is arranged on one side of the quantitative diverter block, and when the steering hydraulic cylinder is extended or retracted, a structure in which the material in the material channel flows to the quantitative tank or the buffer tank can be formed.

[0006] Furthermore, the four corners of the top of the base are connected to a first support plate through columns, the first driving hydraulic cylinder is located on the first support plate, a slide plate is slidably mounted on the column, and the piston rod end of the first driving hydraulic cylinder and the first connecting rod are respectively arranged at the upper and lower ends of the slide plate.

[0007] Furthermore, an electronic measuring ruler is provided on the base, and a sliding rod end of the electronic measuring ruler is connected to the slide plate.

[0008] Furthermore, a second support plate is mounted on the outer wall of the cache tank, and the four corners of the second support plate are connected to the second driving hydraulic cylinder through guide columns, and the first guide plate is slidably connected to the guide column, and the piston rod end of the second driving hydraulic cylinder and the second connecting rod are respectively arranged at the upper and lower ends of the first guide plate.

[0009] Furthermore, the steering hydraulic cylinder is connected to the quantitative diversion block through a pull rod, and a second guide plate is slidably connected to the pull rod. One end of the second guide plate is connected to the piston rod of the steering hydraulic cylinder. A through hole is opened on the quantitative diversion block and is vertically arranged with the material channel. The through hole passes through the material channel. A core shaft is arranged in the through hole, and one end of the core shaft is connected to the other end of the second guide plate through a push rod.

[0010] Furthermore, an insulation layer is provided on the outer walls of the quantitative tank and the buffer tank.

[0011] Furthermore, a first heating layer is provided on the outer wall of the quantitative tank, and a first heating chamber is formed in an enclosed space between the outer wall of the quantitative tank and the first heating layer. A second heating layer is provided on the outer wall of the cache tank to form a second heating space with the outer wall of the cache tank, and heating medium is provided in both the second heating chamber and the first heating chamber.

[0012] Furthermore, the first heating chamber and the second heating chamber are connected by a connecting pipe. The first heating chamber has a spiral electric heating tube, and the top of the second heating chamber is provided with a three-way pipe. The two inlet ends of the three-way pipe are respectively connected to an exhaust valve and a pressurizing pipeline, and the pressurizing pipeline is provided with a pressurizing valve.

[0013] Furthermore, a safety valve and a liquid level sensor are provided on the top of the first heating chamber.

[0014] Furthermore, an output pipe and a drain pipe are respectively provided on the top and bottom of the first heating chamber, an input pipe is provided with an input valve, and a drain pipe is provided with a drain valve.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention controls the mandrel in and out of the through hole by steering the hydraulic cylinder, controls the flow direction of the material in the material channel, satisfies the requirement that the material enters the quantitative tank or enters the buffer tank for temporary storage, can realize non-stop feeding, and reduces the wear on the equipment; 2. The material enters the quantitative tank from the bottom of the quantitative tank and pushes the first extrusion plate to rise. The rising and falling heights of the first extrusion plate are determined by an electronic measuring ruler to ensure that the volume of the material in the quantitative tank is constant, achieve precise quantitative feeding, and ensure the stability of product quality; 3. By connecting the first heating chamber and the second heating chamber to heat the quantitative tank and the storage tank respectively, the heat loss of the quantitative tank 4 and the buffer tank 5 can be reduced, which may cause the material to solidify and affect the discharge effect; at the same time, under the action of the three-way pipe, pressurized pipeline and other structures, the fluidity of the heating medium is increased and the uniformity of heating is improved, so that the heat can evenly heat the materials in the quantitative tank and the buffer tank to avoid uneven heating and affect the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of another viewing angle of the present invention; Figure 3 It is a cross-sectional structural schematic diagram of the present invention; Figure 4 is a cross-sectional structural schematic diagram of another viewing angle of the present invention; Figure 5 The present invention Figure 4 A magnified view of the structure at A; Figure 6 It is a schematic diagram of the cross-sectional structure of the quantitative tank and the buffer tank of the present invention.

[0017] In the figure, 1, base; 2, quantitative diverter block; 3, material channel; 4, quantitative tank; 5, buffer tank; 6, first driving hydraulic cylinder; 7, second driving hydraulic cylinder; 8, first connecting rod; 9, first extrusion plate; 10, second connecting rod; 11, second extrusion plate; 12, steering hydraulic cylinder; 13, column; 14, first support plate; 15, slide plate; 16, second support plate; 17, guide; 18, first guide plate; 19, electronic measuring ruler; 20. Pull rod; 21. Second guide plate; 22. Through hole; 23. Mandrel; 24. Push rod; 25. Insulation layer; 26. First heating layer; 27. First heating chamber; 28. Second heating layer; 29. ​​Second heating chamber; 30. Connecting pipe; 31. Electric heating pipe; 32. Three-way pipe; 33. Exhaust valve; 34. Pressurized pipeline; 35. Pressurized valve; 36. Safety valve; 37. Liquid level sensor; 38. Drain pipe; 39. Drain valve. DETAILED DESCRIPTION

[0018] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0019] like Figure 1-6As shown, the present invention provides a quantitative feeding device for a compression molding machine, including a base 1 and a quantitative diverter block 2, a material channel 3 is arranged in the quantitative diverter block 2, the feed end of the material channel 3 is connected to a feeding mechanism, the discharge end of the material channel 3 is connected to a discharge mechanism, a discharge valve is arranged on the discharge mechanism, a quantitative tank 4 and a buffer tank 5 connected to the material channel 3 are arranged on the top of the quantitative diverter block 2, a first driving hydraulic cylinder 6 and a second driving hydraulic cylinder 7 are arranged on the top of the quantitative tank 4 and the buffer tank 5, respectively, the first driving hydraulic cylinder 6 is connected to a first extrusion plate 9 slidably connected to the inner wall of the quantitative tank 4 through a first connecting rod 8, the second driving hydraulic cylinder 7 is connected to a second extrusion plate 11 slidably connected to the inner wall of the buffer tank 5 through a second connecting rod 10, and a steering hydraulic cylinder 12 is arranged on one side of the quantitative diverter block 2, and when the steering hydraulic cylinder 12 is extended or retracted, a structure in which the material in the material channel 3 flows to the quantitative tank 4 or the buffer tank 5 can be formed.

[0020] like Figure 1 and 3 As shown, the feeding mechanism transfers the heat-treated material to the material channel 3, the second driving hydraulic cylinder 7 drives the second extrusion plate 11 to be located at the bottom of the buffer tank 5, and the piston rod of the second driving hydraulic cylinder 7 is in a locked state to prevent the material from entering the buffer tank 5. At this time, the discharge valve on the discharge mechanism is in a closed state, and the steering hydraulic cylinder 12 controls the material in the material channel 3 to flow into the quantitative tank 4. The material is input from the bottom of the quantitative tank 4 to lift the first extrusion plate 9, and the piston rod of the first driving hydraulic cylinder 6 contracts. When a certain amount of material flows into the quantitative tank 4, the discharge valve is opened, and the piston rod of the second driving hydraulic cylinder 7 is opened to lock the state, and the steering hydraulic cylinder 12 is started to control the material in the material channel 3 to flow into the bottom of the storage tank 5. The material in the storage tank 5 will drive the second extrusion plate 11 to move upward, and the first driving hydraulic cylinder 6 is started to drive the first extrusion plate 9 to squeeze the material in the quantitative tank 4 to the discharge end of the material channel 3, and enter the discharge mechanism along the discharge end. , flows into the lower mold of the compression molding machine by the discharging mechanism, and then controls the upper mold of the compression molding machine to extrude and mold the material. In the process of conveying the material to the lower mold of the compression molding machine and the upper mold of the compression molding machine to extrude and mold the material, the quantitative feeding mechanism continuously conveys the material to the buffer tank 5. After all the materials in the quantitative tank 4 are squeezed out, the discharging valve is closed, and the steering hydraulic cylinder 12 controls the material in the material channel 3 to flow into the quantitative tank 4. The second driving hydraulic cylinder 7 is started to drive the second extrusion plate 11 to squeeze the material in the buffer tank 5 out. As the material in the material channel 3 enters the quantitative tank 4, the operation is repeated to achieve the purpose of quantitatively conveying materials without stopping. Compared with the existing shutdown and intermittent feeding method, the present invention can ensure the consistency of raw material usage for each product and the stability of product quality by accurately quantitatively feeding without stopping. There is no stop in the process of quantitative conveying, which also avoids damage to the equipment caused by repeated shutdown and startup.

[0021] The four corners of the top of the base 1 are connected to a first support plate 14 through columns 13, the first driving hydraulic cylinder 6 is located on the first support plate 14, a slide plate 15 is slidably mounted on the column 13, and the piston rod end of the first driving hydraulic cylinder 6 and the end of the first connecting rod 8 are respectively arranged at the upper and lower ends of the slide plate 15 through flanges.

[0022] like Figure 1 As shown, the slide plate 15 is slidably installed on the column 13 to ensure that the slide plate 15 can move stably up and down along the column 13. The piston rod end of the first driving hydraulic cylinder 6 and the end of the first connecting rod 8 are fixedly connected with flanges. The piston rod end of the first driving hydraulic cylinder 6 and the flange on the first connecting rod 8 are fixed to the upper and lower ends of the slide plate 15 by bolts. The piston rod of the first driving hydraulic cylinder 6 drives the first extrusion plate 9 to slide along the column 13, which can indirectly improve the accuracy and stability of the movement of the first extrusion plate 9 in the quantitative tank 4.

[0023] The base 1 is provided with an electronic measuring ruler 19 , and a sliding rod end of the electronic measuring ruler 19 is connected to the slide plate 15 .

[0024] like Figure 2As shown, in this embodiment, a programmable control system is also included. The starting value and the ending value of the electronic measuring ruler 19 are input into the programmable control system. The electronic measuring ruler 19 is used to measure the running height of the slide plate 15, that is, the actual running height of the first extrusion plate 9 in the quantitative tank 4. In the initial state, the first extrusion plate 9 is located at the lower part of the quantitative tank 4. During the process of the material entering the quantitative tank 4, the material enters from the bottom of the quantitative tank 4. The material entering the quantitative tank 4 will drive the first extrusion plate 9 to move upward. During the movement, the slide plate 15 moves upward along the column 13. The slide plate 15 drives the first driving hydraulic cylinder 6 to contract until the slide plate 15 rises to the numerical height at the end of the electronic measuring ruler 19 setting. The set height value is calculated in the following way: first determine the volume of the required material, assuming that the volume of the required material is V, and the moving height of the first extrusion plate 9 in the quantitative tank 4 is Δh. According to V=S·Δh (S is the bottom area of ​​the quantitative tank 4), , the value of Δh is equal to the end value of the electronic measuring ruler 19 minus the initial value of the electronic measuring ruler 19. The initial value of the electronic measuring ruler 19 can be set to a certain value. For example, when the first extrusion plate 9 is at the bottom of the quantitative tank 4 (it may not be at the bottom, subject to the specific value entered by the operator), when the sliding rod of the electronic measuring ruler 19 is at the initial value, the height of the slide plate 15 measured by the electronic measuring ruler 19 is h1, and when the first extrusion plate 9 is at the upper part of the quantitative tank 4, the height of the slide plate 15 is measured as h2, and Δh is h2-h1. The values ​​of V, S, h1 and Δh are all fixed values, so h2=h1+Δh is the final height value set by the electronic measuring ruler 19. After the electronic measuring ruler 19 moves to the set height, the electronic measuring ruler 19 transmits a signal to the next step to control the steering hydraulic cylinder 12 to transport materials into the buffer tank 5, and start the first driving hydraulic cylinder 6 to drive the first extrusion plate 9 to extrude the material in the quantitative tank 4 and transport the material to the injection molding machine.

[0025] A second support plate 16 is mounted on the outer wall of the cache tank 5. The four corners of the second support plate 16 are connected to the second driving hydraulic cylinder 7 via guide columns 17. A first guide plate 18 is slidably connected to the guide column 17. The piston rod end of the second driving hydraulic cylinder 7 and the second connecting rod 10 are respectively arranged at the upper and lower ends of the first guide plate 18 via flanges.

[0026] like Figure 1 and 2As shown, in the present embodiment, the piston rod end of the second driving hydraulic cylinder 7 and the end of the second connecting rod 10 are both fixedly connected with flanges, and the piston rod end of the second driving hydraulic cylinder 7 and the flanges on the second connecting rod 10 are fixed to the upper and lower ends of the first guide plate 18 by bolts, and the second support plate 16 and the guide column 17 both play the role of supporting the second driving hydraulic cylinder 7. At the same time, the first guide plate 18 is slidably installed on the guide column 17 to ensure the stability of the up and down movement of the piston rod of the second driving hydraulic cylinder 7, thereby indirectly improving the accuracy and stability of the movement of the second extrusion plate 11 in the cache tank 5.

[0027] The steering hydraulic cylinder 12 is connected to the quantitative diversion block 2 through a pull rod 20, and a second guide plate 21 is slidably connected to the pull rod 20. One end of the second guide plate 21 is connected to the piston rod of the steering hydraulic cylinder 12. A through hole 22 vertically arranged to the material channel 3 is opened on the quantitative diversion block 2. The through hole 22 is located between the quantitative tank 4 and the buffer tank 5. The through hole 22 passes through the material channel 3. A core shaft 23 is provided in the through hole 22. One end of the core shaft 23 is connected to the other end of the second guide plate 21 through a push rod 24.

[0028] like Figure 1 and 3 As shown, the pull rod 20 is used to support the steering hydraulic cylinder 12. The steering hydraulic cylinder 12 drives the second guide plate 21 along the pull rod 20 to drive the core shaft 23 to enter the through hole 22. The diameter of the core shaft 23 is larger than the material channel 3. When the core shaft 23 is in the through hole 22, the outer wall of the core shaft 23 blocks the material channel 3 to prevent the material in the material channel 3 from entering the quantitative tank 4, so that the material enters the buffer tank 5. On the contrary, when the core shaft 23 is outside the through hole 22, the material channel 3 is in an open state, and the material will enter the quantitative tank 4.

[0029] The outer walls of the quantitative tank 4 and the buffer tank 5 are both provided with a heat-insulating layer 25 .

[0030] like Figure 6 As shown, the heat-insulating layer 25 plays a role of heat insulation, which can prevent the heat loss of the quantitative tank 4 and the buffer tank 5 from causing the material to solidify when the heat-treated material is stored in the quantitative tank 4 and the buffer tank 5, thereby affecting the discharge effect.

[0031] A first heating layer 26 is provided on the outer wall of the quantitative tank 4, and a first heating chamber 27 is formed between the outer wall of the quantitative tank 4 and the first heating layer 26. A second heating layer 28 is provided on the outer wall of the cache tank 5 to form a second heating space 29 with the outer wall of the cache tank 5. Heating medium is provided in both the second heating chamber 27 and the first heating chamber 29.

[0032] like Figure 6As shown, in order to ensure that the materials in the metering tank 4 and the buffer tank 5 do not solidify due to heat loss, in this embodiment, a heating medium is injected into the first heating chamber 27 and the second heating chamber 29. The heating medium can be water with high thermal conductivity and low cost.

[0033] The first heating chamber 27 and the second heating chamber 29 are connected by a connecting pipe 30. A spiral electric heating tube 31 is provided in the first heating chamber 27. A three-way pipe 32 is provided on the top of the second heating chamber 29. The two inlet ends of the three-way pipe 32 are respectively connected to an exhaust valve 33 and a pressurizing pipeline 34. A pressurizing valve 35 is provided on the pressurizing pipeline 34. The pressurizing pipeline 34 is connected to a nitrogen tank through an air pump.

[0034] like Figure 5 and 6 As shown, the material is heated by the first heating chamber 27 and the second heating chamber 29 to prevent the material from solidifying when it stays in the quantitative tank 4 or the buffer tank 5, which affects the stable output of the material. The electric heating tube 31 heats the heating medium in the first heating chamber 27. The heating medium in the first heating chamber 27 and the heating medium in the second heating chamber 29 are in a connected state. The pressurizing valve 35 is opened through the pressurizing pipeline 34, and nitrogen is input into the first heating chamber 29 to pressurize the second heating chamber 29, so that the heating medium in the first heating chamber 29 flows into the first heating chamber 29. The heating medium in the second heating chamber 29 completes heat exchange with the medium in the first heating chamber 27, and then the second heating chamber 29 is depressurized through the exhaust valve 33, so that the heating medium in the first heating chamber 27 flows into the second heating chamber 29 to heat the material in the buffer tank 5. In this embodiment, the fluidity of the heating medium is increased and the uniformity of heating is improved, so that the heat is evenly used to heat the materials in the quantitative tank 4 and the buffer tank 5, avoiding uneven heating and affecting the quality of the product.

[0035] A safety valve 36 and a liquid level sensor 37 are provided on the top of the first heating chamber 27 .

[0036] like Figure 6As shown, since the heating medium is an aqueous solution, a part of the aqueous solution will vaporize after the temperature is increased, resulting in an increase in the pressure in the first heating chamber 27. The safety valve 36 can ensure the pressure stability in the first heating chamber 27. The switch of the pressurizing valve 35 and the exhaust valve 33 can be controlled according to the data detected by the liquid level sensor 37. When the liquid level sensor 37 detects that the liquid level in the first heating chamber 27 reaches a, the detected signal is transmitted to the programmable control system, and the programmable control system controls the exhaust valve 33 to close. When the liquid level sensor 37 detects that the liquid level in the first heating chamber 27 reaches b, the programmable control system controls the pressurizing valve 35 to open and pressurize the second heating chamber 29. When the liquid level sensor 37 detects that the liquid level in the first heating chamber 27 reaches c, the programmable control system controls the pressurizing valve 35 to close. The heights of the liquid levels a, b, and c satisfy a﹤b﹤c.

[0037] An inlet pipe for heating medium and a drain pipe 38 are respectively disposed at the top and bottom of the first heating chamber 27 . An inlet valve is disposed on the inlet pipe, and a drain valve 39 is disposed on the drain pipe 37 .

[0038] like Figure 6 As shown, the electric heating tube 31 is easily damaged by leakage and short circuit when soaked in water for a long time. It may also corrode the electric heating tube 31 when soaked in water for a long time, especially in the case of poor water quality. The minerals in the water may form calcification on the surface of the electric heating tube 31, affecting the normal use of the electric heating tube 31. Therefore, in this embodiment, by opening the drain valve 39 and the pressurizing valve 35, pressure is applied to the second heating chamber 29, so that the heating medium in the second heating chamber 27 is pressed into the first heating chamber 27 and discharged from the drain pipe 38. By continuously pressurizing the pressurizing pipeline 34, the heating medium in the first heating chamber 27 is cleared, thereby improving the service life of the electric heating tube 31.

[0039] Principle of use: 1. Preheat the quantitative tank 4 and the buffer tank 5: close the drain valve 38, open the exhaust valve 33, start the electric heating tube 31 and inject the heating medium into the first heating chamber 27 through the heating medium inlet. The heating medium in the first heating chamber 27 enters the second heating chamber 29 through the connecting pipe 30. When the liquid level in the second heating chamber 29 reaches a certain height, close the exhaust valve 33, and then continue to inject the heating medium into the first heating chamber 27. When the liquid level in the first heating chamber 27 reaches a specified height, stop the delivery. Figure 1It can be seen that since the height and bottom area of ​​the quantitative tank 4 are greater than those of the cache tank 5, after the heating medium is injected, the pressure in the first heating chamber 27 is greater than the pressure in the second heating chamber 29. In order to improve the uniformity of heating, the pressurizing valve 35 is opened, and inert gas is input into the second heating chamber 29 through the pressurizing pipeline 34, so that the heating medium in the second heating chamber 29 flows into the first heating chamber 27, and the heating medium in the second heating chamber 29 is mixed with the heating medium in the first heating chamber 27. Then, the exhaust valve 33 is opened to release the pressure in the second heating chamber 29, and the heating medium in the first heating chamber 27 will flow into the second heating chamber 29, increasing the fluidity of the heating medium, thereby improving the uniformity of heating of the outer walls of the quantitative tank 4 and the cache tank 5. 2. According to the volume of the required material, determine the height value of the electronic measuring side 19, start the feeding mechanism to transport the material to the material channel 3, at this time, the second extrusion plate 11 is located at the bottom of the buffer tank 5, the piston rod of the second driving hydraulic cylinder 7 is in a locked state, the discharge valve on the discharge mechanism is in a closed state, and the mandrel 23 is away from the through hole 22, so that the material in the material channel 3 enters the quantitative tank 4 from the bottom of the quantitative tank 4, and the material will drive the first extrusion plate 9 to rise along the inner wall of the quantitative tank 4. Under the action of the first connecting rod 8, the first extrusion plate 3 drives the slide plate 15 to rise, and the slide plate 15 drives the sliding rod of the electronic measuring side 19 to rise until the slide plate 15 moves to the specified height, open the discharge valve, and open the piston rod locking state of the second driving hydraulic cylinder 7, start the steering hydraulic cylinder 12 to control the material in the material channel 3 to flow into the bottom of the storage tank 5, and the material in the storage tank 5 will drive the second extrusion plate 11 to move upward, start the first driving hydraulic cylinder 6 to drive the first extrusion plate 9 squeezes the material in the quantitative tank 4 to the discharge end of the material channel 3, enters the discharge mechanism along the discharge end, flows to the lower mold of the compression molding machine by the discharge mechanism, and then controls the upper mold of the compression molding machine to extrude and mold the material. In the process of conveying the material to the lower mold of the compression molding machine and the upper mold of the compression molding machine to extrude and mold the material, the quantitative feeding mechanism continuously conveys the material to the buffer tank 5. After all the material in the quantitative tank 4 is squeezed out, that is, when the slide plate 15 is at the position of the initial value set by the electronic measuring ruler 19, the discharge valve is closed, and the second driving hydraulic cylinder 7 is started to drive the second extrusion plate 11 to squeeze the material in the buffer tank 5 out into the material channel 3. As the material in the material channel 3 enters the quantitative tank 4, the operation is repeated to achieve the purpose of quantitative material conveying without stopping the machine, while ensuring the consistency of the raw material dosage of each product and the stability of the product quality. In addition, the machine does not stop during the quantitative conveying process, and the damage to the equipment caused by repeated shutdown and startup is also avoided.

[0040] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A quantitative feeding device for a compression molding machine, characterized in that: The invention comprises a base (1) and a quantitative flow dividing block (2), wherein a material channel (3) is provided in the quantitative flow dividing block (2), a feeding end of the material channel (3) is connected to a feeding mechanism, a discharging end of the material channel (3) is connected to a discharging mechanism, a discharging valve is provided on the discharging mechanism, a quantitative tank (4) and a buffer tank (5) which are in communication with the material channel (3) are provided on the top of the quantitative flow dividing block (2), a first driving hydraulic cylinder (6) and a second driving hydraulic cylinder (7) are provided on the tops of the quantitative tank (4) and the buffer tank (5), respectively, the first driving hydraulic cylinder (6) is connected to a first extrusion plate (9) which is slidably connected to the inner wall of the quantitative tank (4) via a first connecting rod (8), the second driving hydraulic cylinder (7) is connected to a second extrusion plate (11) which is slidably connected to the inner wall of the buffer tank (5) via a second connecting rod (10), and a steering hydraulic cylinder (12) is provided on one side of the quantitative flow dividing block (2), and when the steering hydraulic cylinder (12) is extended or retracted, a structure is formed in which the material in the material channel (3) flows to the quantitative tank (4) or the buffer tank (5).

2. A quantitative feeding device for a compression molding machine according to claim 1, characterized in that The four corners of the top of the base (1) are connected to a first support plate (14) through columns (13); the first driving hydraulic cylinder (6) is located on the first support plate (14); a slide plate (15) is slidably mounted on the column (13); the piston rod end of the first driving hydraulic cylinder (6) and the first connecting rod (8) are respectively arranged at the upper and lower ends of the slide plate (15).

3. A quantitative feeding device for a compression molding machine according to claim 2, characterized in that The base (1) is provided with an electronic measuring ruler (19), and the sliding rod end of the electronic measuring ruler (19) is connected to the slide plate (15).

4. The quantitative feeding device for a compression molding machine according to claim 1, characterized in that: A second support plate (16) is mounted on the outer wall of the cache tank (5); the four corners of the second support plate (16) are connected to the second driving hydraulic cylinder (7) via guide columns (17); a first guide plate (18) is slidably connected to the guide column (17); the piston rod end of the second driving hydraulic cylinder (7) and the second connecting rod (10) are respectively arranged at the upper and lower ends of the first guide plate (18).

5. The quantitative feeding device for a compression molding machine according to claim 1, characterized in that: The steering hydraulic cylinder (12) is connected to the quantitative flow dividing block (2) via a pull rod (20), a second guide plate (21) is slidably connected to the pull rod (20), one end of the second guide plate (21) is connected to the piston rod of the steering hydraulic cylinder (12), a through hole (22) vertically arranged with respect to the material channel (3) is provided on the quantitative flow dividing block (2), the through hole (22) passes through the material channel (3), a core shaft (23) is provided in the through hole (22), one end of the core shaft (23) is connected to the other end of the second guide plate (21) via a push rod (24).

6. A quantitative feeding device for a compression molding machine according to claim 1, characterized in that: The outer walls of the quantitative tank (4) and the buffer tank (5) are both provided with a heat-insulating layer (25).

7. A quantitative feeding device for a compression molding machine according to claim 1, characterized in that: A first heating layer (26) is provided on the outer wall of the quantitative tank (4), and a first heating chamber (27) is formed between the outer wall of the quantitative tank (4) and the first heating layer (26). A second heating layer (28) is provided on the outer wall of the buffer tank (5) and forms a second heating space (29) with the outer wall of the buffer tank (5). A heating medium is provided in both the second heating chamber (27) and the first heating chamber (29).

8. A quantitative feeding device for a compression molding machine according to claim 7, characterized in that: The first heating chamber (27) and the second heating chamber (29) are connected via a connecting pipe (30); a spirally structured electric heating pipe (31) is provided in the first heating chamber (27); a three-way pipe (32) is provided at the top of the second heating chamber (29); two inlet ends of the three-way pipe (32) are respectively connected to an exhaust valve (33) and a pressurizing pipeline (34); and a pressurizing valve (35) is provided on the pressurizing pipeline (34).

9. A quantitative feeding device for a compression molding machine according to claim 8, characterized in that: A safety valve (36) and a liquid level sensor (37) are provided on the top of the first heating chamber (27).

10. The quantitative feeding device for a compression molding machine according to claim 8, characterized in that: An inlet pipe and a drain pipe (38) are respectively provided at the top and bottom of the first heating chamber (27); an inlet valve is provided on the inlet pipe, and a drain valve (39) is provided on the drain pipe (38).

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