Molding press

Abstract

The utility model provides a molding press and belongs to the technical field of processing equipment. The problem that the product percent of pass is reduced during batch production of an existing molding press is solved. The molding press comprises a workbench, a mold and a feeding barrel with an upper opening and a lower opening are arranged on the workbench, the feeding barrel can move horizontally, the molding press further comprises a weighing barrel located above the feeding barrel, a pressure sensor is arranged on the weighing barrel, a feeding port and a discharging port are formed in the top and the bottom of the weighing barrel respectively, and a sealing plate capable of opening and closing the discharging port is arranged at the discharging port. The feeding cylinder can move to enable the upper end opening of the feeding cylinder to be opposite to the discharging opening, and a sealing piece sealed with the workbench is arranged at the position of the lower end opening of the feeding cylinder. The molding press improves the qualified rate of products in batch production.

Description

Technical Field

[0001] The utility model belongs to the technical field of processing equipment and relates to a molding machine. Background Art

[0002] A molding machine is a device that pours powder or granules into a mold and squeezes the powder or granules in the mold into shape through the pressure of a punch.

[0003] For example, a graphite column forming press disclosed in Chinese patent literature [Announcement No. CN201752899U] includes a feeding mechanism, a mold frame, a control system, a hydraulic system and an ejector cylinder. The feeding mechanism is connected to the mold frame, the ejector cylinder is arranged under the mold frame, and the ejector cylinder is connected to the hydraulic system. The feeding mechanism includes a feeding cylinder, a feeding plate and a feeding support plate. The mold frame includes an upper mold plate, an upper pressure head, a lower pressure head, a female mold plate, a lower mold plate and a guide column. The ejector cylinder includes a cylinder and a piston. The working process is: the graphite column raw material is loaded into the feeding plate of the feeding mechanism, and then the feeding mechanism feeds the graphite column raw material into the female mold of the mold frame, the upper mold plate of the mold frame is pressed down, the upper pressure head enters the female mold, and then the hydraulic system pressurizes to complete the pressing, the upper pressure head returns to the feeding position with the upper mold plate, and then the ejector cylinder drives the lower pressure head to eject the pressed finished product. When adding graphite column raw materials to the feeding plate, it is usually done manually. After weighing, it needs to be manually transported and poured into the feeding plate. The raw materials are in powder or granular form and are easy to spill during the transportation and pouring process. This will cause the weight of the finished product after pressing to vary, reducing the qualified rate of the product during mass production. Utility Model Content

[0004] The purpose of the utility model is to propose a molding machine to solve the above problems in the prior art, and the technical problem is how to improve the product qualification rate in batch production.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A molding machine comprises a workbench, on which a mold and a feeding cylinder with upper and lower openings are arranged, and the feeding cylinder can move horizontally. The invention is characterized in that it also comprises a weighing cylinder located above the feeding cylinder, on which a pressure sensor is arranged, and the top and bottom of the weighing cylinder respectively have a feed port and a discharge port, and a sealing plate capable of opening and closing the discharge port is arranged at the discharge port, the feeding cylinder can be moved so that the upper end of the feeding cylinder is opposite to the discharge port, and a sealing member that seals with the workbench is arranged at the lower end of the feeding cylinder.

[0007] During operation, the sealing plate first closes the discharge port, and then the raw material enters the weighing cylinder from the feed port, and is weighed by the pressure sensor. When the weight of the raw material in the weighing cylinder reaches the requirement, the feeding cylinder moves so that the upper end of the feeding cylinder is opposite to the discharge port, and then the sealing plate opens the discharge port, and the raw material enters the feeding cylinder after passing through the discharge port and the upper end of the feeding cylinder. After that, the feeding cylinder moves so that the lower end of the feeding cylinder is opposite to the mold, and the raw material in the feeding cylinder falls into the mold for pressing. Since the raw material is weighed before pressing, and the weighed raw material directly enters the feeding cylinder, no manual handling is required, which avoids the possibility of spilling during manual handling. At the same time, the lower end of the feeding cylinder is sealed with the workbench through a sealing member, which avoids the possibility of raw material leakage during the movement of the feeding cylinder, thereby reducing the possibility of spilling and leaking of raw materials after weighing, so that the weight of the raw material entering the mold can be basically the same during batch production, that is, the weight of the product after pressing can be basically the same, thereby improving the qualified rate of products during batch production.

[0008] In the above-mentioned molding machine, linear guide rails are respectively arranged on both sides of the bottom of the weighing cylinder at the discharge port, and both sides of the sealing plate are respectively embedded in the corresponding linear guide rails and can move along the linear guide rails.

[0009] The sealing plate moves along the linear guide to open and close the discharge port. The linear guide has a guiding function, which makes the sealing plate move in an accurate direction, so that the discharge port can be opened and closed quickly and accurately. The linear guide also has a positioning function, so that the sealing plate is positioned up and down on the weighing cylinder. When the sealing plate closes the discharge port, the raw material is pressed on the sealing plate, and the sealing plate is positioned up and down on the weighing cylinder, so that the raw material pressed on the sealing plate can also be weighed by the pressure sensor, so that the raw material is weighed accurately, which is conducive to ensuring the qualified rate of products in mass production.

[0010] In the above-mentioned molding machine, the sealing plate has a positioning portion extending from between two linear guide rails, a driving rod for driving the sealing plate to move is arranged between the feeding cylinder and the weighing cylinder, a driving groove is arranged on the upper surface of the driving rod, and the positioning portion is inserted into the driving groove.

[0011] The driving rod and the sealing plate are positioned through the driving groove and the positioning part, and the driving rod drives the sealing plate to move to realize the opening and closing of the sealing plate to the discharge port. The positioning part is inserted in the driving groove to avoid interference of the driving rod during weighing, so that the weighing is accurate.

[0012] In the above-mentioned molding machine, the pressure sensor is annular, and the outer surface of the weighing cylinder has an annular fixed disk, the weighing cylinder is inserted into the pressure sensor and the fixed disk is fixed to the pressure sensor. In this way, the pressure sensor can be evenly stressed and the weighing can be accurate.

[0013] In the above-mentioned molding machine, the weighing cylinder includes a main cylinder body and a guide plate fixed at the bottom of the main cylinder body, the guide plate is sleeved on the bottom end of the main cylinder body and fixed, and the linear guide rail is arranged on the guide plate. The main cylinder body and the guide plate can be processed separately, and the weighing cylinder arranged separately makes the weighing cylinder convenient to process. The guide plate is fixed to the main cylinder body by threaded connection or screws.

[0014] In the above-mentioned molding machine, the main cylinder body includes a cone cylinder body section in the shape of an inverted cone and a column cylinder body section in the shape of a cylinder, and the column cylinder body section is located below the cone cylinder body section and connected. This makes the diameter of the feed port larger, reduces the possibility of spilling when the raw materials are poured into the weighing cylinder, and reduces the waste of raw materials. The inclined cylinder wall of the cone cylinder section has a guiding and gathering function, so that the raw materials entering the weighing cylinder can slide smoothly and gather into the column cylinder section, which is conducive to ensuring that all the weighed raw materials enter the feeding cylinder and are transported to the mold for pressing, thereby improving the qualified rate of products in mass production.

[0015] In the above-mentioned molding machine, the feeding barrel includes an upper barrel section in the shape of an inverted cone and a lower barrel section in the shape of a cylinder, and the lower barrel section is located below and connected to the upper barrel section.

[0016] This makes the diameter of the upper port of the feeding barrel larger, reducing the possibility of raw materials entering the feeding barrel and scattering, which is conducive to pressing all the weighed raw materials. The inclined wall of the upper barrel section has a guiding and gathering function, allowing the raw materials entering the feeding barrel to slide smoothly and gather into the lower barrel section, which is conducive to ensuring that all the weighed raw materials enter the mold for pressing, and improving the qualified rate of products in mass production.

[0017] In the above-mentioned molding machine, the sealing member is sleeved on the outer side of the bottom end of the feeding barrel, and a positioning sleeve is also sleeved and fixed on the outer side of the bottom end of the feeding barrel. A positioning groove is opened on the bottom surface of the positioning sleeve, and the sealing member is embedded in the positioning groove.

[0018] The positioning sleeve has a positioning function for the seal, so that the seal can stably maintain a sealing state with the workbench during the movement of the feeding barrel, avoiding the leakage of raw materials from the feeding barrel during the movement of the feeding barrel, which is beneficial to ensure that all the weighed raw materials enter the mold for pressing, thereby improving the qualified rate of products in mass production.

[0019] In the above molding machine, a mounting box is fixed on the workbench, a fixing frame is arranged inside the mounting box, and the pressure sensor is fixed on the fixing frame. The mounting box protects the pressure sensor and the weighing cylinder, reduces the interference of the external environment on the weighing of the pressure sensor, and makes the weighing accurate.

[0020] In the above-mentioned molding machine, a storage barrel with upper and lower openings is fixed on the top wall of the installation box, and the lower port of the storage barrel is opposite to and connected with the feed port of the weighing barrel. A rotatable feeding shaft is arranged in the storage barrel, and a spiral blade is arranged on the feeding shaft, and the spiral blade is located in the lower port of the storage barrel. When the feeding shaft rotates, the spiral blade rotates, so that the raw material of the storage barrel is output downward by the spiral blade and enters the weighing barrel by gravity. In this way, automatic feeding can be realized, manual participation in feeding can be reduced, and weighing can be accurate.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] The setting of the seals on the weighing cylinder and the feeding cylinder allows the raw materials to be weighed before pressing, and will not spill or leak out during the process of being conveyed to the mold during weighing, so that the weight of the raw materials when entering the mold can be basically the same during batch production, that is, the weight of the product after pressing can be basically the same, thereby improving the qualified rate of products in batch production. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of this molding machine.

[0024] Figure 2 It is a cross-sectional view of this molding machine.

[0025] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0026] Figure 4 yes Figure 3 Cross-sectional view along the BB direction.

[0027] Figure 5 It is a three-dimensional diagram of the weighing cylinder in this molding machine.

[0028] In the figure, 1, workbench; 2, mold; 3, punch; 4, stamping cylinder; 5, ejector cylinder; 6, ejector rod; 7, feeding cylinder; 7a, upper cylinder section; 7b, lower cylinder section; 8, connecting sleeve; 9, unloading slide plate; 10, weighing cylinder; 10a, feeding port; 10b, discharging port; 10c, fixing plate; 10d, guide plate; 10d1, linear guide rail; 10e, main cylinder; 10e 1. Conical cylinder section; 10e2. Columnar cylinder section; 11. Pressure sensor; 12. Closing plate; 12a. Positioning part; 13. Seal; 14. Mounting box; 15. Fixing frame; 16. Storage barrel; 17. Feeding shaft; 18. Spiral blade; 19. Motor; 20. Positioning sleeve; 20a. Positioning groove; 21. Driving rod; 21a. Driving groove; 22. Linear slide; 23. Feeding cylinder. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0030] like Figure 1 and Figure 2 As shown, a molding machine includes a workbench 1, on which a mold 2 is arranged, and a punch 3 is correspondingly arranged above the mold 2. The punch 3 is connected to a stamping cylinder 4, and the stamping cylinder 4 drives the punch 3 to move up and down. An ejection cylinder 5 is arranged below the mold 2, and a push rod 6 is connected to the ejection cylinder 5. The push rod 6 is inserted upward into the mold 2, and the ejection cylinder 5 drives the push rod 6 to move up and down. A feeding cylinder 7 that can move horizontally is also arranged on the workbench 1, and the feeding cylinder 7 has upper and lower openings. A connecting sleeve 8 is sleeved and fixed on the outer side of the feeding cylinder 7, and the connecting sleeve 8 is cylindrical. A feeding cylinder 23 is connected to the connecting sleeve 8. The piston rod of the feeding cylinder 23 is fixedly connected to the connecting sleeve 8, and the cylinder body of the feeding cylinder 23 is fixed on the workbench 1. In the figure, the cylinder body of the feeding cylinder 23 is located on the right side of the mold 2. The feeding cylinder 23 can drive the connecting sleeve 8 and the feeding barrel 7 to move horizontally left and right, and the feeding barrel 7 can move to the lower end of the feeding barrel 7 opposite to the mold 2. An inclined unloading slide 9 is fixed on the left side of the workbench 1 to slide the finished product out of the workbench 1.

[0031] like Figure 1 and Figure 2 As shown, the molding machine also includes a weighing cylinder 10 located above the feed cylinder 7, a pressure sensor 11 is arranged on the weighing cylinder 10, and the top and bottom of the weighing cylinder 10 are respectively provided with a feed port 10a and a discharge port 10b, and a sealing plate 12 capable of opening and closing the discharge port 10b is arranged at the discharge port 10b. The feed cylinder 7 can be moved to make the upper end of the feed cylinder 7 face the discharge port 10b, and a sealing member 13 sealed with the workbench 1 is arranged at the lower end of the feed cylinder 7. An installation box 14 is fixed on the workbench 1 to the right of the punch 3, and a fixing frame 15 is arranged in the installation box 14. A storage barrel 16 with upper and lower openings is fixed on the top wall of the installation box 14. The lower end of the storage barrel 16 is inserted into the top wall of the installation box 14, and the lower port of the storage barrel 16 is opposite to and communicated with the feed port 10a of the weighing cylinder 10. A rotatable feeding shaft 17 is arranged in the storage barrel 16, and a spiral blade 18 is arranged on the feeding shaft 17. The spiral blade 18 is located in the lower port of the storage barrel 16. The size of the spiral blade 18 matches the size of the lower port of the storage barrel 16, and the outer side surface of the spiral blade 18 is gap-matched with the inner side surface of the lower port of the storage barrel 16, so that the spiral blade 18 can rotate while the stationary spiral blade 18 can block the raw material, that is, the raw material is output from the storage barrel 16 only when the spiral blade 18 rotates. A motor 19 is fixed on the top of the storage barrel 16, and the rotating shaft of the motor 19 is fixed to the feeding shaft 17. When the motor 19 is working, it can drive the feeding shaft 17 to rotate.

[0032] like Figure 3 As shown, the seal 13 is sleeved on the outer side of the bottom end of the feed barrel 7, and a positioning sleeve 20 is also sleeved and fixed on the outer side of the bottom end of the feed barrel 7. A positioning groove 20a is provided on the bottom surface of the positioning sleeve 20, and the seal 13 is embedded in the positioning groove 20a. The seal 13 is an O-ring or a rubber ring with an embedded skeleton. The feed barrel 7 includes an upper barrel section 7a in an inverted cone shape and a lower barrel section 7b in a cylindrical shape. The lower barrel section 7b is located below the upper barrel section 7a and is connected. The seal 13 is sleeved on the outer side of the lower barrel section 7b. The upper edge of the feed barrel 7 has a convex edge protruding outward, and the convex edge is fixedly connected to the connecting sleeve 8 by screws. The bottom surface of the feed barrel 7 and the bottom surface of the connecting sleeve 8 are both in contact with the upper surface of the workbench 1, and the seal 13 is in contact with and sealed against the upper surface of the workbench 1.

[0033] like Figure 3 , Figure 4 and Figure 5 As shown, the pressure sensor 11 is annular, and the pressure sensor 11 is of the prior art. A pressure sensor of model LFC-120M can be selected, and the pressure sensor 11 is fixed on the fixing frame 15. The outer surface of the weighing cylinder 10 has an annular fixing plate 10c, and the weighing cylinder 10 is inserted into the pressure sensor 11 and the fixing plate 10c is fixed to the pressure sensor 11. The bottom of the weighing cylinder 10 is located on both sides of the discharge port 10b and linear guides 10d1 are respectively provided, and both sides of the sealing plate 12 are respectively embedded in the corresponding linear guides 10d1 and can move along the linear guides 10d1. The linear guides 10d1 are arranged along the front-to-back direction, and the sealing plate 12 can move along the front-to-back direction. The weighing cylinder 10 includes a main cylinder body 10e and a guide plate 10d fixed to the bottom of the main cylinder body 10e, the guide plate 10d is sleeved outside the main cylinder body 10e and fixed, and the linear guide 10d1 is arranged on the guide plate 10d. The main cylinder body 10e includes a cone section 10e1 in the shape of an inverted cone and a column section 10e2 in the shape of a cylinder. The column section 10e2 is located below and connected to the cone section 10e1. The guide plate 10d is mounted on the outside of the column section 10e2 and fixed. The sealing plate 12 has a positioning portion 12a extending from between the two linear guide rails 10d1, and the length of the positioning portion 12a is set along the left-right direction. A driving rod 21 for driving the sealing plate 12 to move is arranged between the feeding cylinder 7 and the weighing cylinder 10, and the length of the driving rod 21 is set along the left-right direction. A linear slide 22 arranged in the front-to-back direction is fixed to the right side of the installation box 14, and the slider of the linear slide 22 is fixed to the right end of the driving rod 21. The linear slide 22 drives the driving rod 21 to move forward and backward. A driving groove 21a is arranged on the upper surface of the driving rod 21, and the length of the driving groove 21a is arranged along the left-right direction. The positioning portion 12a is inserted into the driving groove 21a, and the thickness of the positioning portion 12a in the front-to-back direction is smaller than the width of the driving groove 21a in the front-to-back direction. In this way, the driving rod 21 will not interfere with the sealing plate 12 when the molding machine is weighed, so that the weighing is accurate.

[0034] The feeding cylinder 23, the punching cylinder 4 and the ejecting cylinder 5 are all connected to the solenoid valve, and the solenoid valve, the motor 19, the linear slide 22 and the pressure sensor 11 are all electrically connected to the control panel of the molding machine. The control panel controls the movement of the solenoid valve, the motor 19 and the linear slide 22, and the pressure sensor 11 transmits the sensing signal to the control panel.

[0035] Before processing, add raw materials into the storage barrel 16, the sealing plate 12 closes the discharge port 10b of the weighing barrel 10, and the feeding cylinder 23 works to move the feeding barrel 7 to the bottom of the weighing barrel 10. During operation, the motor 19 rotates to rotate the spiral blade 18, and the raw materials fall from the lower port of the storage barrel 16 into the weighing barrel 10. The pressure sensor 11 senses the change in pressure and sends an induction signal to the control panel. When the induction signal reaches the set value, that is, the weight of the raw materials is the preset weight of production, the control panel controls the motor 19 to stop rotating, and the raw materials in the storage barrel 16 are no longer output; then the linear slide 22 works to move the sealing plate 12 backward to open the discharge port 10b, and the raw materials in the weighing barrel 10 enter the feeding barrel 7; then the feeding cylinder 23 works to move the feeding barrel 7 to the right. If a finished product has been ejected by the ejector rod 6, when the feeding barrel 7 passes through the mold 2, the finished product is pushed away, and the ejection cylinder 5 drives the ejector rod 6 to move downward. The forming cavity of the mold 2 is released, and the raw material in the feeding barrel 7 falls into the forming cavity of the mold 2. The feeding barrel 7 continues to move to the right until it reaches the edge of the workbench 1, and the finished product will be pushed to the unloading slide 9 by the connecting sleeve 8 outside the feeding barrel 7, and the finished product slides out of the workbench 1 along the unloading slide 9; then the feeding barrel 7 moves to the left and is located directly below the weighing barrel 10, and the stamping cylinder 4 drives the punch 3 to press down to press the raw material in the mold 2 into shape. After forming, the stamping cylinder 4 rises and resets, and the ejection cylinder 5 drives the ejector 6 to move upward to eject the finished product; during the stamping and forming of the raw material, the linear slide 22 drives the sealing plate 12 to move forward and reset to close the discharge port 10b, and then the motor 19 works to continue to transport the raw material downward, and the working process is repeated.

[0036] Since the raw materials are weighed before pressing, and the weighed raw materials directly enter the feeding barrel 7, there is no need for manual handling, thus avoiding the possibility of spillage during manual handling. At the same time, the lower port of the feeding barrel 7 is sealed with the workbench 1 through the sealing member 13, thus avoiding the possibility of leakage of the raw materials during the movement of the feeding barrel 7, thereby reducing the possibility of spillage and leakage of the weighed raw materials, so that the weight of the raw materials entering the mold 2 during batch production can be basically the same, that is, the weight of the product after pressing can be basically the same, thereby improving the qualified rate of products during batch production.

[0037] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but this will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A molding machine, comprising a workbench (1), on which a mold (2) and a feeding cylinder (7) with upper and lower openings are arranged, wherein the feeding cylinder (7) can move horizontally, and is characterized in that: It also includes a weighing cylinder (10) located above the feeding cylinder (7), the weighing cylinder (10) is provided with a pressure sensor (11), the top and bottom of the weighing cylinder (10) are respectively provided with a feed port (10a) and a discharge port (10b), the discharge port (10b) is provided with a sealing plate (12) capable of opening and closing the discharge port (10b), the feeding cylinder (7) can be moved so that the upper end of the feeding cylinder (7) is opposite to the discharge port (10b), and the lower end of the feeding cylinder (7) is provided with a sealing member (13) that is sealed with the workbench (1).

2. The molding machine according to claim 1, characterized in that The bottom of the weighing cylinder (10) is located at both sides of the discharge port (10b) and linear guide rails (10d1) are respectively arranged, and both sides of the sealing plate (12) are respectively embedded in the corresponding linear guide rails (10d1) and can move along the linear guide rails (10d1).

3. The molding machine according to claim 2, characterized in that The sealing plate (12) has a positioning portion (12a) extending from between two linear guide rails (10d1), and a driving rod (21) for driving the sealing plate (12) to move is arranged between the feeding cylinder (7) and the weighing cylinder (10), and a driving groove (21a) is arranged on the upper surface of the driving rod (21), and the positioning portion (12a) is inserted into the driving groove (21a).

4. The molding machine according to claim 1, characterized in that The pressure sensor (11) is annular, and the outer surface of the weighing cylinder (10) is provided with an annular fixing disk (10c). The weighing cylinder (10) is inserted into the pressure sensor (11), and the fixing disk (10c) is fixed to the pressure sensor (11).

5. The molding machine according to claim 2, characterized in that: The weighing cylinder (10) comprises a main cylinder body (10e) and a guide plate (10d) fixed at the bottom of the main cylinder body (10e); the guide plate (10d) is sleeved on the bottom end of the main cylinder body (10e) and fixed; and the linear guide rail (10d1) is arranged on the guide plate (10d).

6. The molding machine according to claim 5, characterized in that The main cylinder body (10e) comprises a cone cylinder section (10e1) in the shape of an inverted cone and a column cylinder section (10e2) in the shape of a cylinder. The column cylinder section (10e2) is located below the cone cylinder section (10e1) and is connected to the cone cylinder section (10e1).

7. The molding machine according to any one of claims 1 to 6, characterized in that: The feeding cylinder (7) comprises an upper cylinder section (7a) in the shape of an inverted cone and a lower cylinder section (7b) in the shape of a cylinder, wherein the lower cylinder section (7b) is located below and connected to the upper cylinder section (7a).

8. The molding machine according to any one of claims 1 to 6, characterized in that: The sealing member (13) is sleeved on the outer side of the bottom end of the feeding tube (7), and a positioning sleeve (20) is also sleeved and fixed on the outer side of the bottom end of the feeding tube (7). A positioning groove (20a) is provided on the bottom surface of the positioning sleeve (20), and the sealing member (13) is embedded in the positioning groove (20a).

9. The molding machine according to any one of claims 1 to 6, characterized in that: An installation box (14) is fixed on the workbench (1), a fixing frame (15) is arranged inside the installation box (14), and the pressure sensor (11) is fixed on the fixing frame (15).

10. The molding machine according to claim 9, characterized in that A material storage barrel (16) with upper and lower openings is fixed on the top wall of the installation box (14); the lower port of the material storage barrel (16) is opposite to and connected to the feed port (10a) of the weighing barrel (10); a rotatable feeding shaft (17) is arranged in the material storage barrel (16); a spiral blade (18) is arranged on the feeding shaft (17); and the spiral blade (18) is located in the lower port of the material storage barrel (16).

Images