Sintering frame for sintering PTFE piston ring

Abstract

The utility model discloses a sintering frame for sintering a PTFE piston ring, which comprises a bottom plate and a plurality of trays, the periphery of the bottom plate is connected with a plurality of support rods, the trays are sequentially arranged from bottom to top, the peripheries of the trays are respectively arranged on bolts, the support rods are respectively provided with a plurality of through holes, each tray comprises an enclosure frame and a screen plate positioned in the enclosure frame, and the screen plates are arranged on the periphery of the bottom plate. A plurality of clamping grooves are formed in the periphery of the lower end of the surrounding frame, the bolts are clamped into the corresponding clamping grooves respectively, inserting grooves are formed in the four corners of the bottom plate respectively and correspond to the supporting rods in a one-to-one mode, the lower ends of the supporting rods are inserted into the corresponding inserting grooves respectively, butt joint holes are formed in the two sides of each inserting groove, and the bolts are arranged in the butt joint holes. According to the sintering device for the PTFE piston ring, the sintering frame can be assembled at will according to the requirement, and the sintering requirements of the PTFE piston rings with different heights are met while the sintering quality is guaranteed. The sintering frame is convenient to assemble, the trays are convenient to load and unload, the space in the sintering furnace can be fully utilized, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to piston ring sintering technical field, concretely relates to sintering frame for PTFE piston ring sintering. BACKGROUND

[0002] PTFE (polytetrafluoroethylene) piston ring is a ring-shaped piston ring made of polytetrafluoroethylene. Polytetrafluoroethylene can be used for a long time in the environment of -180~260 DEG C, has the characteristics of acid resistance, alkali resistance, resistance to various organic solvents, and almost insoluble in all solvents, plus the extremely low friction coefficient of polytetrafluoroethylene, so it is often used as a lubricating material. The preparation process of polytetrafluoroethylene piston ring includes putting the powder into the mold to press into shape, and then forming a tubular polytetrafluoroethylene tube after sintering, and cutting the polytetrafluoroethylene tube into a sheet-shaped piston ring by using cutting equipment. The semi-finished PTFE piston ring needs to be placed in a sintering furnace during the sintering process, and high-temperature sintering is carried out at a certain temperature. The applicant discloses a sintering frame for sintering polytetrafluoroethylene piston ring in the utility model patent with the patent name of "sintering furnace for producing polytetrafluoroethylene lubricating material". The sintering frame can be adaptively adjusted according to the height of the polytetrafluoroethylene lubricating material, and the sintering effect is ensured. The feeding and discharging process of the polytetrafluoroethylene lubricating material is simple, safe and fast. However, it is found that the utilization rate is not high during use due to the circular arrangement of the net disc, and the space in the sintering furnace is easily wasted. At the same time, the entire sintering frame needs to be transferred during feeding and discharging. Because the sintering frame is full of piston ring semi-finished products, the weight is heavy, the feeding and discharging process is time-consuming and laborious, and safety hazards are easily caused. CONTENT OF THE UTILITY MODEL

[0003] To solve the above technical problems, the utility model adopts the technical scheme of: the sintering frame for PTFE piston ring sintering, including bottom plate and a plurality of trays, the bottom plate and the tray are square, a plurality of support rods are detachably connected around the bottom plate, the trays are sequentially arranged from bottom to top above the bottom plate, the four corners of the tray are respectively placed on the bolts, a plurality of through holes are respectively arranged on the support rods for the bolts to pass through, the through holes are sequentially and uniformly arranged on the corresponding support rods from bottom to top, the tray includes a surrounding frame and a net plate inside the surrounding frame, the four corners of the net plate are respectively fixedly connected to the lower end of the surrounding frame, a plurality of clamping grooves are respectively arranged around the lower end of the surrounding frame, the clamping grooves correspond to the bolts, the bolts are respectively clamped into the corresponding clamping grooves, a plurality of insertion grooves are respectively arranged at the four corners of the bottom plate, the insertion grooves correspond to the support rods one by one, the cross sections of the insertion grooves and the support rods are both square, the lower ends of the support rods are respectively inserted into the corresponding insertion grooves, the two sides of the insertion groove are provided with butt joints, the butt joints are provided with bolts, and the bolts pass through the through holes of the butt joints and the lower ends of the support rods and are connected with nuts.

[0004] As the preferred technical scheme of the above, the support rod is hollow, the upper end of the support rod is provided with a socket, a stabilizing rod is inserted into the socket, and the stabilizing rods on adjacent support rods are fixedly connected through connecting rods.

[0005] As the preferred technical scheme of the above, the frame is provided with a plurality of handle openings.

[0006] As the preferred technical scheme of the above, the four corners of the bottom plate are respectively provided with pulleys.

[0007] As the preferred technical scheme of the above, the tray, the bottom plate and the support rod are made of aluminum, aluminum alloy or steel.

[0008] The PTFE piston ring sintering sintering frame of the utility model can be assembled at will according to needs, the sintering quality is guaranteed, and the sintering needs of PTFE piston rings of different heights and sizes are adapted to. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is the structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0010] The technical scheme of the utility model will be described clearly and completely in combination with the drawings, obviously, the described embodiments are a part of the embodiments of the utility model, not all the embodiments.

[0011] In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as the limitation of the utility model.

[0012] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term '' install '' '' link '' '' connection '' should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the intercommunication, for the ordinary skill in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances.

[0013] As Figure 1 The utility model discloses a sintering frame for PTFE piston ring sintering, including bottom plate 1 and a plurality of trays, bottom plate 1 and tray are square, the periphery of bottom plate 1 is detachably connected with a plurality of support bars 2, the tray is located the top of bottom plate 1 and is sequentially arranged from below to above, the periphery of tray is placed on bolt 3 respectively, a plurality of through holes 4 for bolt 3 are arranged on support bar 2 respectively, the through hole 4 is sequentially and evenly spaced on the corresponding support bar 2 from below to above, the tray includes frame 5 and net plate 6 in the frame 5, the periphery of net plate 6 is fixedly connected with the lower end of frame 5 respectively, the lower end of frame 5 is equipped with a plurality of clamping grooves 7 respectively around, and the clamping groove 7 corresponds with bolt 3, and bolt 3 is clamped into the corresponding clamping groove 7 respectively, the four corners of bottom plate 1 are equipped with the insertion slot respectively, and the insertion slot corresponds with support bar 2 one by one, and the cross section of insertion slot and the cross section of support bar 2 are all square, and the lower end of support bar 2 is inserted into the corresponding insertion slot respectively, and the both sides of insertion slot are equipped with butt joint holes, and bolt 3 is arranged in butt joint hole, and bolt 3 passes through the through hole 4 of butt joint hole and the lower end of support bar 2 and is connected with the nut respectively.The tray and bottom plate 1 are square, improve the utilization rate of sintering furnace, improve the utilization rate of tray.The gap between the lowest tray and bottom plate 1, the gap between the adjacent two trays, ensure the temperature balance of PTFE piston ring on each tray, avoid local temperature too low, ensure sintering quality.When placing the tray in the sintering frame, bolt 3 is clamped into the clamping groove 7, so that the tray will not slide off from bolt 3.When taking out the tray, lift the tray upward, so that bolt 3 is separated from the clamping groove 7, and the tray can be pulled out.Support bar 2 and insertion slot are square structure, facilitate the butt joint of through hole 4 and butt joint hole, facilitate the positioning of bolt 3 on support bar 2.

[0014] Further, the support bar 2 is hollow, the upper end of the support bar 2 is provided with a socket, the socket is inserted with a stabilizing rod 11, and the stabilizing rods 11 on adjacent support bars 2 are fixedly connected through a connecting rod 12. The stabilizing rod 11 and the connecting rod 12 constitute a stabilizing frame, the upper end of the support bar 2 is fixed through the stabilizing frame, and the stability is maintained. The support bar 2 is hollow, which can reduce the weight of the support bar 3, and facilitate the assembly and transfer of the sintering frame.

[0015] Further, the frame 5 is provided with a plurality of handle openings 13.

[0016] Further, the four corners of the bottom plate 1 are respectively provided with pulleys.

[0017] Further, the tray, the bottom plate 1 and the support rod 2 are all made of aluminum, aluminum alloy or steel. The sintering frame has good heat conduction, high structural strength, can be repeatedly used and can withstand high temperature of about 500 DEG C.

[0018] It is worth mentioning that the technical features of the sintering furnace and the like involved in the utility model patent application should be regarded as prior art, the specific structure, working principle and possible control mode and spatial arrangement mode of these technical features can be selected by using the conventional selection in the field, and should not be regarded as the invention point of the utility model patent. The utility model patent will not be further specifically expanded and described.

[0019] The preferred embodiments of the utility model are described in detail above, and it should be understood that those skilled in the art can make many modifications and changes according to the concept of the utility model without creative labor, therefore, all the technical solutions obtained by logical analysis, reasoning or limited experiments on the basis of the prior art according to the concept of the utility model should be within the protection scope determined by the claims.

Claims

1. A sintering jig for sintering of PTFE piston rings, characterized in that The utility model provides a kind of square-shaped bottom plate and several trays, the four sides of the bottom plate are detachably connected with several support rods, the trays are sequentially arranged from bottom to top above the bottom plate, and the four sides of the tray are placed on bolts respectively, the support rods are respectively provided with several through holes for bolts, the through holes are sequentially and evenly spaced on the corresponding support rods from bottom to top, the tray includes a frame and a mesh plate inside the frame, the four sides of the mesh plate are fixedly connected with the lower end of the frame respectively, the lower end of the frame is respectively provided with several clamping grooves, the clamping grooves correspond to the bolts, the bolts are respectively clamped into the corresponding clamping grooves, the four corners of the bottom plate are respectively provided with insertion slots, the insertion slots correspond to the support rods one by one, the cross section of the insertion slot and the cross section of the support rod are both square, the lower end of the support rod is respectively inserted into the corresponding insertion slot, the two sides of the insertion slot are provided with butt joints, the butt joints are provided with bolts, the bolts are respectively inserted through the butt joints and the through holes of the lower end of the support rod and connected with nuts.

2. The sintering frame for sintering of PTFE piston rings as set forth in claim 1, characterized in that, The support rod is hollow, the upper end of the support rod is provided with a socket, a stabilizing rod is inserted into the socket, and the stabilizing rods on adjacent support rods are fixedly connected by connecting rods.

3. The sintering frame for sintering of PTFE piston rings as set forth in claim 1, characterized in that, The frame is provided with several handle openings.

4. The sintering frame for sintering of PTFE piston rings as set forth in claim 1, characterized in that, The four corners of the bottom plate are respectively provided with pulleys.

5. The sintering frame for sintering of PTFE piston rings as claimed in claim 1, wherein, The tray, the bottom plate and the support rod are made of aluminum, aluminum alloy or steel.

Images