Automatic material supplementing device for molding press

Abstract

The utility model belongs to the polytetrafluoroethylene product production technical field, specifically provides a kind of moulding press automatic material supplementing device, including weighing assembly and discharge component, wherein, weighing assembly can automatically take certain amount of raw material, and automatically unload by unloading valve.Discharge component includes the inner cone bucket and outer cone bucket being arranged below unloading valve, the discharge pipe being arranged at the bottom of outer cone bucket and discharge mechanism.Discharge mechanism includes sliding sleeve and first telescopic link, and material is made to slide down along the sharp part of distribution head by discharge mechanism, since annular discharge cavity formed between discharge pipe inner wall and distribution head and the concave cavity of mould correspond up and down, powder material can be evenly filled into concave cavity, help to ensure the uniformity of product density.When discharge component works, unloading valve has completed unloading, at this time, unloading valve can be controlled to close, and the weighing of next time material supplementing is continued by weighing assembly, help to save operation time, improve material supplementing efficiency.

Description

Technical Field

[0001] This application belongs to the field of polytetrafluoroethylene product manufacturing technology, specifically an automatic feeding device for a molding machine. Background Technology

[0002] Polytetrafluoroethylene (PTFE) gaskets or fittings are products made from PTFE powder as raw material and pressed using a molding machine. In the production of PTFE gaskets or fittings, powdered raw material (mainly PTFE powder) needs to be filled into the cavity of the lower mold, and then pressed into shape using a press and an upper mold.

[0003] Traditionally, polytetrafluoroethylene (PTFE) powder is manually filled. The process involves first weighing an appropriate amount of raw material, then manually adding it into the annular cavity of the mold using a cup or shovel. This method has low production efficiency and cannot meet the processing requirements of mass production. Uneven distribution of the powder within the cavity can also lead to uneven product density, affecting product quality. Utility Model Content

[0004] Based on the above-mentioned technical problems, this application provides an automatic feeding device for a molding machine to replace manual feeding and solve the technical problems of low efficiency and uneven material distribution in manual feeding.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide an automatic material replenishment device for a molding machine, comprising: A weighing assembly for weighing a predetermined weight of material, wherein the weighing assembly is provided with a discharge valve at its bottom; and The discharge assembly includes an outer cone hopper, an inner cone hopper, a discharge pipe, and a discharge mechanism; The outer cone hopper is located below the discharge valve; The inner cone is coaxially disposed inside the outer cone, the outer wall of the inner cone is fixedly connected to the inner wall of the outer cone, and a guide tube is coaxially disposed at the bottom of the inner cone. The discharge pipe is located at the bottom of the outer cone hopper, and a distribution head is fixedly installed at the center of the discharge pipe. The distribution head has an upward-pointing sharp part and is located below the guide pipe. The discharge mechanism includes a sliding sleeve and a first telescopic rod. The sliding sleeve is coaxially arranged and slidably engaged with the guide tube. The first telescopic rod is located in the inner cone hopper and is used to drive the sliding sleeve to rise and fall. The sliding sleeve has a sealing position where its bottom abuts against the sharp part, and a discharge position where its bottom is located above the sharp part.

[0006] In one possible implementation, the weighing component includes: A weighing hopper has a receiving cavity for holding materials, with a feed inlet at the top of the receiving cavity and a discharge outlet at the bottom of the receiving cavity, and a discharge valve located at the discharge outlet; and A weighing sensor is connected to the weighing hopper.

[0007] In one possible implementation, the weighing sensor is a beam sensor, with one end connected to the outer wall of the weighing hopper and the other end connected to a fixed unit.

[0008] In one possible implementation, the discharge valve includes: Valve plate, hinged to the discharge port; and The second telescopic rod is located in the weighing hopper and is used to drive the valve plate to rotate around its own hinge axis.

[0009] In one possible implementation, the discharge pipe is detachably connected to the outer cone hopper.

[0010] In one possible implementation, the pointed portion is a cone shape with the tip pointing upwards.

[0011] In one possible implementation, the pointed portion is connected to the inner wall of the discharge pipe via a connecting piece.

[0012] In one possible implementation, a plurality of the connecting pieces are evenly distributed along the circumferential direction of the discharge pipe.

[0013] In one possible implementation, the outer wall of at least one of the outer cone buckets or the inner cone buckets is provided with a bin wall vibrator.

[0014] In one possible implementation, the top of the outer cone bucket is provided with a protective sleeve, the protective sleeve being cylindrical in shape, and the protective sleeve extending upward to above the height of the unloading valve.

[0015] Compared with the prior art, the advantages of the automatic feeding device for molding machines provided in this application are: The automatic material replenishment device for a molding press provided in this application includes a weighing component and a discharging component. The weighing component automatically weighs a certain amount of raw material and automatically discharges it through a discharge valve. The discharging component includes an inner cone hopper and an outer cone hopper located below the discharge valve, a discharge pipe located at the bottom of the outer cone hopper, and a discharging mechanism. The discharging mechanism includes a sliding sleeve and a first telescopic rod. Initially, the operating table of the molding press is controlled to move the mold below the discharge pipe, with the cavity of the mold corresponding vertically to the annular cavity formed between the inner wall of the discharge pipe and the distribution head. The discharging mechanism controls the first telescopic rod to be in a sealed position abutting against the distribution head. The discharge valve opens, allowing the material to fall into the inner cone hopper and slide down the inclined surface of the inner cone hopper into the sliding sleeve and guide pipe. After the discharge valve completes discharging, the first telescopic rod drives the sliding sleeve to rise to the discharge position, and the material slides down the distribution head from the discharge pipe into the cavity of the mold, achieving automatic material replenishment.

[0016] This application utilizes an automatic unloading valve to discharge material, which then slides down the sharp tip of the dispensing head via a discharge mechanism. Because the annular discharge cavity formed between the inner wall of the discharge pipe and the dispensing head corresponds vertically to the cavity of the mold, the powdery material can be evenly filled into the cavity, helping to ensure the uniformity of product density. While the discharge assembly is operating, the unloading valve has already completed unloading. At this point, the unloading valve can be closed, and the weighing assembly can continue weighing for the next replenishment, saving operation time and improving replenishment efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of the automatic feeding device for the molding machine provided in the embodiments of this application. Figure 1 ; Figure 2 A schematic diagram of the structure of the automatic feeding device for the molding machine provided in the embodiments of this application. Figure 2 ; Figure 3 This is an internal sectional view of the sliding sleeve in the discharge position in an embodiment of this application; Figure 4 This is a partial cross-sectional view of the sliding sleeve in the discharge position in an embodiment of this application; Figure 5 This is a schematic diagram of the discharge pipe structure in an embodiment of this application; Figure 6 This is a schematic diagram of the weighing component in an embodiment of this application; Explanation of reference numerals in the attached figures: 10. Weighing assembly; 11. Discharge valve; 111. Valve plate; 112. Second telescopic rod; 12. Weighing hopper; 13. Weighing sensor; 14. Fixing unit; 20. Discharge assembly; 21. Outer cone hopper; 211. Protective sleeve; 22. Inner cone hopper; 221. Guide tube; 23. Discharge pipe; 231. Distributor head; 232. Connecting piece; 24. Discharge mechanism; 241. Sliding sleeve; 242. First telescopic rod; 30. Bin vibrator. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0021] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0024] Please refer to the following: Figures 1 to 6 The automatic feeding device for the molding machine provided in the embodiments of this application will now be described.

[0025] This application provides an automatic feeding device for a molding machine, including a weighing component 10 and a discharging component 20. The weighing component 10 is used to weigh materials of a predetermined weight, and a discharge valve 11 is provided at the bottom of the weighing component 10; the discharging component 20 includes an outer cone hopper 21, an inner cone hopper 22, a discharge pipe 23, and a discharge mechanism 24.

[0026] Both the outer cone hopper 21 and the inner cone hopper 22 are funnel-shaped. The outer cone hopper 21 is located below the discharge valve 11. The inner cone hopper 22 is coaxially located inside the outer cone hopper 21, and its outer wall is fixedly connected to the inner wall of the outer cone hopper 21, forming a single unit. A guide pipe 221 is coaxially installed at the bottom of the inner cone hopper 22. Material falling into the inner cone hopper 22 collects along the inclined surface of the inner cone hopper 22 and is discharged through the guide pipe 221. The discharge pipe 23 is located at the bottom of the outer cone hopper 21. A distributor head 231 is coaxially fixed at the center of the discharge pipe 23. The distributor head 231 has an upward-pointing sharp part and is located below the guide pipe 221. Material discharged through the guide pipe 221 falls onto the sharp part of the distributor head 231 and slides down along the sharp part.

[0027] The discharge mechanism 24 includes a sliding sleeve 241 and a first telescopic rod 242. The sliding sleeve 241 is coaxially arranged and slidably engaged with the guide tube 221. The sliding sleeve 241 can be sleeved on the outer wall of the guide tube 221 or disposed on the inner wall of the guide tube 221. A sealing ring can be provided between the sliding sleeve 241 and the guide tube 221 to improve the sealing effect.

[0028] The first telescopic rod 242 is located in the inner cone hopper 22 and is used to drive the sliding sleeve 241 to rise and fall. The sliding sleeve 241 has a sealing position where the bottom abuts against the sharp part and a discharge position where the bottom is located above the sharp part.

[0029] One or more first telescopic rods 242 can be provided. When multiple first telescopic rods 242 are provided, they are distributed at intervals along the circumference of the sliding sleeve 241. The first telescopic rods 242 are used to drive the sliding sleeve 241 to rise and fall. When the sliding sleeve 241 falls, the sliding sleeve 241 moves as follows: Figure 4 As shown, the material is temporarily stored in the sliding sleeve 241, guide tube 221, and inner cone hopper 22, which abut against the distributing head 231. When discharge is required, the first telescopic rod 242 drives the sliding sleeve 241 to rise, creating a discharge gap between the bottom of the sliding sleeve 241 and the distributing head 231. The material enters the discharge pipe 23 through the discharge gap and finally falls into the cavity of the lower mold, filling the cavity evenly.

[0030] The inner diameter of the discharge pipe 23 and the outer diameter of the distribution head 231 correspond to the inner and outer diameters of the mold cavity, allowing the material to fall into the mold cavity under the influence of gravity.

[0031] Compared with the prior art, the beneficial effects of the automatic material feeding device for molding machines provided in this application are: The automatic feeding device for a molding press provided in this application includes a weighing component 10 and a discharging component 20. The weighing component 10 can automatically weigh a certain amount of raw materials and automatically discharge them through a discharge valve 11. The discharging component 20 includes an inner cone hopper 22 and an outer cone hopper 21 disposed below the discharge valve 11, a discharge pipe 23 disposed at the bottom of the outer cone hopper 21, and a discharging mechanism 24. The discharging mechanism 24 includes a sliding sleeve 241 and a first telescopic rod 242. Initially, the operating table of the molding press is controlled to move the mold below the discharge pipe 23, and the cavity of the mold corresponds vertically to the annular cavity formed between the inner wall of the discharge pipe 23 and the distributing head 231. The discharging mechanism 24 controls the first telescopic rod 242 to be in a sealed position abutting against the distributing head 231, and the discharge valve 11 is opened to allow the material to fall into the inner cone hopper 22 and slide down the inclined surface of the inner cone hopper 22 into the sliding sleeve 241 and the guide pipe 221. After the unloading valve 11 finishes unloading, the first telescopic rod 242 drives the sliding sleeve 241 to rise to the discharge position. The material slides down from the discharge pipe 23 along the material distribution head 231 and falls into the cavity of the mold, realizing automatic material replenishment.

[0032] In this embodiment, the material is automatically unloaded via the unloading valve 11, and then slid down the sharp part of the dispensing head 231 via the discharge mechanism 24. Since the annular discharge cavity formed between the inner wall of the discharge pipe 23 and the dispensing head 231 corresponds vertically to the cavity of the mold, the powdery material can be evenly filled into the cavity, helping to ensure the uniformity of product density. When the discharge assembly 20 is working, the unloading valve 11 has already completed unloading. At this time, the unloading valve 11 can be closed, and the weighing assembly 10 can continue to weigh the material for the next replenishment, which helps to save operation time and improve replenishment efficiency.

[0033] The automatic feeding device for molding machines provided in this application embodiment is suitable for the automatic quantitative addition of polytetrafluoroethylene powder and can be used to produce annular polytetrafluoroethylene gaskets or pipes.

[0034] Please see Figure 6 In some possible embodiments, the weighing assembly 10 further includes a weighing hopper 12 and a weighing sensor 13. The weighing hopper 12 has a receiving cavity for containing materials, with a feed inlet at the top of the receiving cavity and a discharge port at the bottom of the receiving cavity, and a discharge valve 11 is provided at the discharge port; the weighing sensor 13 is connected to the weighing hopper 12.

[0035] To ensure smooth material discharge and prevent PTFE adhesion, the inner walls of the inner cone hopper 22, outer cone hopper 21, and weighing hopper 12 should be as smooth as possible. These components can be made of stainless steel.

[0036] The load cell 13 is an existing product, specifically a beam-type sensor. One end of the beam-type sensor is connected to the outer wall of the weighing hopper 12, and the other end is connected to the fixing unit 14.

[0037] The discharge valve 11 is used to control the opening and closing of the discharge port. The discharge valve 11 can be any commercially available discharge mechanism capable of discharging powdery materials, such as a rotary valve or slide gate valve. Figure 6 As shown, the discharge valve 11 specifically includes a valve plate 111 and a second telescopic rod 112. The valve plate 111 is hinged to the discharge port via a pivot, and the rotation of the valve plate 111 can control the opening or closing of the discharge port; the second telescopic rod 112 is located in the weighing hopper 12 and is used to drive the valve plate 111 to rotate around its own hinge axis.

[0038] The second telescopic rod 112 and the first telescopic rod 242 can be existing pneumatic or electric telescopic rods. There are no specific restrictions on their specifications, models, or installation methods; users can configure them according to their needs. When using a pneumatic telescopic rod, necessary air valves and an air source need to be connected. When using an electric telescopic rod, a power supply needs to be connected.

[0039] The top of the outer cone hopper 21 is provided with a protective sleeve 211. The protective sleeve 211 is cylindrical in shape and extends upward to above the height of the unloading valve 11. The protective sleeve 211 is coaxially sleeved on the outer periphery of the weighing hopper 12 and is spaced at a preset distance from the outer wall of the weighing hopper 12 to prevent the powder from escaping during unloading.

[0040] When a molding machine is used to produce products of different diameters, the corresponding mold needs to be changed each time production changes. In order to adapt to different molds, the discharge pipe 23 and the outer cone hopper 21 are detachably connected, and the discharge pipe 23 of different diameters can be replaced as needed.

[0041] The discharge pipe 23 and the outer cone hopper 21 can be connected by bolts, threads, limit pins, or other detachable methods.

[0042] The pointed tip is used to divert material. It is cone-shaped with the tip pointing upwards, guiding the material and ensuring its even distribution. There is no limitation on the specific taper of the pointed tip; it can be determined based on actual performance, ensuring the material can smoothly slide down the cone surface.

[0043] To support the sharp part, the sharp part is connected to the inner wall of the discharge pipe 23 via connecting pieces 232, and multiple connecting pieces 232 are evenly distributed along the circumference of the discharge pipe 23. It should be noted that the thickness of the connecting pieces 232 should not be too thick, otherwise it will obstruct the material and affect the material discharge. The thickness of the connecting pieces 232 can be between 0.5-1mm.

[0044] To further improve the material discharge effect, at least one of the outer cone hopper 21 or the inner cone hopper 22 is provided with a bin wall vibrator 30 on its outer wall. The bin wall vibrator 30 is a vibration motor, and one or more can be set as needed. Considering that the outer cone hopper 21 and the inner cone hopper 22 are fixed as one unit, the bin wall vibrator 30 can be set in either the outer cone hopper 21 or the inner cone hopper 22.

[0045] The silo vibrator 30 is existing technology, and its specific working principle, installation method, and usage will not be described in detail. Depending on the needs, the silo vibrator 30 can be started when the discharge valve 11 discharges material, or when the discharge mechanism 24 discharges material.

[0046] When the bin vibrator 30 is activated during discharge from the discharge valve 11, it transmits vibration force to the inner cone hopper 22, ensuring uniform distribution of material across the inner cone hopper 22 and guide tube 221. When the bin vibrator 30 is activated during discharge from the discharge mechanism 24, it assists in the discharge of polytetrafluoroethylene material, preventing material from adhering to the inner walls of the inner cone hopper 22, guide tube 221, or sliding sleeve 241.

[0047] It is important to note that when the silo vibrator 30 is activated during discharge from the discharge valve 11, the vibration amplitude of the silo vibrator 30 should not be too large, as the sliding sleeve 241 is in a sealed position abutting against the distribution head 231 at this time. Otherwise, the vibration may cause a large gap to form between the sliding sleeve 241 and the distribution head 231, resulting in material leakage. In actual use, if there is a risk of leakage, an annular rubber sleeve can be installed at the bottom of the sliding sleeve 241 to seal the mating surface between it and the distribution head 231 using the deformable and cushioning properties of rubber.

[0048] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present utility model specification has recorded each combined embodiment and can support different combined embodiments.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic material replenishment device for a molding machine, characterized in that, include: Weighing component (10) is used to weigh a predetermined weight of material, and the bottom of the weighing component (10) is provided with a discharge valve (11). as well as The discharge assembly (20) includes an outer cone hopper (21), an inner cone hopper (22), a discharge pipe (23), and a discharge mechanism (24). The outer cone hopper (21) is located below the unloading valve (11); The inner cone (22) is coaxially disposed inside the outer cone (21), the outer wall of the inner cone (22) is fixedly connected to the inner wall of the outer cone (21), and a guide tube (221) is coaxially disposed at the bottom of the inner cone (22). The discharge pipe (23) is located at the bottom of the outer cone hopper (21). A distribution head (231) is fixedly provided at the center of the discharge pipe (23). The distribution head (231) has an upward-pointing sharp part and is located below the guide pipe (221). The discharge mechanism (24) includes a sliding sleeve (241) and a first telescopic rod (242). The sliding sleeve (241) is coaxially arranged and slidably engaged with the guide tube (221). The first telescopic rod (242) is located in the inner cone hopper (22) and is used to drive the sliding sleeve (241) to rise and fall. The sliding sleeve (241) has a sealing position where the bottom abuts against the sharp part, and a discharge position where the bottom is located above the sharp part.

2. The automatic feeding device for a molding machine according to claim 1, characterized in that, The weighing component (10) includes: A weighing hopper (12) has a receiving cavity for holding materials, with an inlet at the top and a discharge port at the bottom, and a discharge valve (11) located at the discharge port; and A weighing sensor (13) is connected to the weighing hopper (12).

3. The automatic feeding device for the molding machine according to claim 2, characterized in that, The weighing sensor (13) is a beam sensor. One end of the beam sensor is connected to the outer wall of the weighing hopper (12), and the other end is connected to the fixing unit (14).

4. The automatic feeding device for the molding machine according to claim 2, characterized in that, The discharge valve (11) includes: Valve plate (111), hinged to the discharge port; and The second telescopic rod (112) is provided on the weighing hopper (12) and is used to drive the valve plate (111) to rotate around its own hinge axis.

5. The automatic feeding device for a molding machine according to claim 1, characterized in that, The discharge pipe (23) is detachably connected to the outer cone hopper (21).

6. The automatic feeding device for a molding machine according to claim 1 or 5, characterized in that, The pointed portion is cone-shaped with the tip pointing upwards.

7. The automatic feeding device for a molding machine according to claim 1 or 5, characterized in that, The pointed part is connected to the inner wall of the discharge pipe (23) via a connecting piece (232).

8. The automatic material replenishing device for a molding machine according to claim 7, characterized in that, Multiple connecting pieces (232) are evenly distributed along the circumferential direction of the discharge pipe (23).

9. The automatic material replenishing device for a molding machine according to claim 1, characterized in that, The outer wall of at least one of the outer cone hopper (21) or the inner cone hopper (22) is provided with a hopper wall vibrator (30).

10. The automatic feeding device for a molding machine according to claim 1, characterized in that, The top of the outer cone bucket (21) is provided with a protective sleeve (211), which is cylindrical in shape and extends upward to above the height of the unloading valve (11).

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