A lap forming method of a ring-shaped plastic fiberboard skin circle

Abstract

A kind of annular plastic fiber plate skin ring lap joint forming method, annular plastic fiber plate skin ring is formed by strip-shaped plastic fiber plate lap joint, characterized by: the strip-shaped plastic fiber plate lap joint forming is shaping strip-shaped plastic fiber plate lap joint part, form a crescent-shaped arc cavity at lap joint, then the inner surface of the crescent-shaped arc cavity is uniformly heated by heating device, then the lap joint part is pressed to form annular plastic fiber plate skin ring.The present application uses the lap joint part of the annular plastic fiber plate skin ring to be made to combine to form a lap joint crescent-shaped cavity, and then the lap joint surface of the crescent-shaped cavity is heated by a crescent-shaped heating head, so that the lap joint surface can be heated sufficiently without affecting the overall structural deformation, so that the overall shape can be controlled well during lap joint pressing, and the lap joint effect is good.

Description

TECHNICAL FIELD

[0001] The application relates to a lap joint method of a plastic fiber plate, in particular to a lap joint forming method of a runway annular plastic fiber plate. BACKGROUND

[0002] With the development of industrial technology, the requirement for the light weight of various components is also increasing, and many components are proposed to be replaced by plastic fiber light weight materials; in order to improve the light weight effect, a reinforcing method of adopting light weight composite high polymer foaming materials inside and plastic fiber plate sheaths outside is proposed to improve the light weight strength. The so-called plastic fiber plate sheath is to wrap a layer of higher strength outer plastic fiber on the base of the ordinary light weight material, so as to ensure that the overall strength of the light weight component does not decrease, for example, the light weight connecting rod is made by wrapping a layer of high strength annular plastic fiber plate sheath on the light weight foaming material. This method has been widely applied to the light weight manufacturing of connecting rods and other rod components. When manufacturing the light weight components, a layer of high strength annular plastic fiber plate sheath is first manufactured, and then the conventional light weight foaming material is injected into the high strength annular plastic fiber plate sheath to manufacture the light weight component.

[0003] However, when manufacturing the light weight components, the annular plastic fiber plate sheath must be manufactured first, and when manufacturing the annular plastic fiber plate sheath, the forming method of winding the plastic fiber and then dipping the resin is usually adopted; however, the annular plastic fiber plate sheath manufactured in this way often encounters the problem of inaccurate determination of the size of the annular plastic fiber plate sheath, thereby leading to the fact that the size of the manufactured annular plastic fiber plate sheath often does not match the actual requirement. The inventor has conducted serious research on this problem; in the research on the manufacturing of the annular plastic fiber plate sheath, it is found that the reason why the size is inaccurate when the annular plastic fiber plate sheath is manufactured by adopting the conventional winding method is that the winding force is needed when the annular plastic fiber sheath is wound to ensure that the wound sheath has a determined shape and is convenient for ensuring that the manufactured annular plastic fiber plate sheath has sufficient strength; however, because the winding force exists when the winding is performed, once the winding force is removed after the winding is completed, the annular plastic fiber plate sheath will shrink under the action of the elastic force of the plastic fiber, and the shrinkage caused by the elastic force of the plastic fiber is difficult to control, which leads to the fact that the size precision of the wound annular plastic fiber plate sheath is difficult to ensure, and the subsequent manufacturing process is increased in difficulty, so it is necessary to improve this.

[0004] By querying retrieval for the discovery of the same technology report, only the relevant field of technology literature, the closest by the following several:

[0005] 1、Patent No. CN202010681758.1, named "high precision, high yield of carbon foam composite material mold and preparation method", the applicant is Tianjin Aisida Aerospace Technology Co., Ltd. The invention patent application discloses a metal plastic lapping equipment, which obtains a carbon foam mold base, prepares a rough contact surface on the carbon foam mold base, obtains a pre-soaked first skin fiber fabric, winds the first skin fiber fabric on the carbon foam mold base and covers at least the rough contact surface, forms an adhesive layer above the rough contact surface, obtains a second skin fiber fabric, soaks and shapes the second skin fiber fabric, coats an adhesive on the adhesive layer and forms a smooth contact surface, and then lays the soaked and shaped second skin fiber fabric on the smooth contact surface, and obtains a carbon foam composite material mold after high temperature curing treatment.

[0006] 2、Patent No. CN03152642.X, named "Method and device for lap welding of plastic material", the applicant is Lester Processing Technology Co., Ltd. The invention patent application discloses a method and device for lap welding of plastic material, which mainly relates to welding of a web, film or similar form of plastic material by means of a heating wedge, wherein a second pressure roller is not used to weld the material web. For this purpose, the heating wedge is placed on the lower material web and moves through the material web under pressure. The pressure is generated by a pressure device having a pressure roller, which presses against the upper material web and the heating wedge. Small irregularities under the lower material web can be compensated by the heating rod by means of a floating support.

[0007] 3、Patent No. CN200710303469.2, named "A method for lapping different rolls", the invention patent application discloses a method for lapping different rolls, which adopts a lapping strip to realize the lapping, the lapping strip comprises a reinforcing layer and a separation layer, a glue layer is arranged between the reinforcing layer and the separation layer, the glue layer is divided into two parts along the width direction center line, one part is a high molecular glue layer, and the other part is an asphalt glue layer, when the glue layer is a high molecular glue layer, a material layer is further arranged between the glue layer and the reinforcing layer, the material layer is a plastic layer or a rubber layer, the method comprises the following steps: S1, selecting corresponding lapping strips according to the types of different rolls; S2, cleaning the lapping part of the roll; S3, removing the separation layer of the lapping strip, and connecting the lapping strip with different rolls through different glue layers.

[0008] Although these patents all relate to the lapping method or device of plastic material, the existing patent technology still directly heats the parts to be lapped as a whole, and does not substantially solve the problem of deformation of the existing high polymer material lapping, resulting in that the lapped part is not strong in bonding force or is deformed, so the problems described above still exist, so it is necessary to improve it. SUMMARY

[0009] The technical problem to be solved by the present application is to overcome the deficiencies and defects mentioned in the above background art, and to provide a lapping method for the manufacture of annular high polymer composite material skin; the lapping method for the manufacture of annular high polymer composite material skin can effectively solve the problem of uneven deformation and pressure bonding force in the lapping forming process of high polymer material layer, thereby improving the performance of the manufactured annular high polymer composite material skin.

[0010] The present application is mainly realized by the following technical scheme: a lapping forming method for annular plastic fiber plate skin ring, the annular plastic fiber plate skin ring is formed by lapping strip-shaped plastic fiber plates, the lapping forming by strip-shaped plastic fiber plates is to shape the lapping part of the strip-shaped plastic fiber plate, form a crescent-shaped arc-shaped cavity at the lapping part, then uniformly heat the inner surface of the crescent-shaped arc-shaped cavity by a heating device, and then pressure bond the lapping part to form an annular plastic fiber plate skin ring as a whole.

[0011] Further, the crescent-shaped arc-shaped cavity formed at the lapping part is that the lapping part portions of the strip-shaped plastic fiber plates to be made into annular plastic fiber plate skin rings are respectively made into curved arc surfaces, then the strip-shaped plastic fiber plates to be made into annular plastic fiber plate skin rings are placed in a forming device, and the curved arc surfaces of the lapping part portions of the strip-shaped plastic fiber plates are misaligned and lapped together when the strip-shaped plastic fiber plates are lapped, to form a crescent-shaped arc-shaped cavity.

[0012] Further, the uniformly heating of the inner surface of the arc-shaped cavity by the heating device is that a crescent-shaped heating head matched with the crescent-shaped arc-shaped cavity formed by the lapping part portions is inserted into the crescent-shaped arc-shaped cavity, and the lapping surfaces of the lapping part portions in the crescent-shaped arc-shaped cavity are heated by the hot air blown out by the crescent-shaped heating head.

[0013] Further, the hot air blown out by the crescent-shaped heating head is that a plurality of hot air holes are respectively opened on the part of the crescent-shaped heating head facing the lapping surfaces of the lapping part portions in the crescent-shaped arc-shaped cavity according to the heating hot air requirement, so that the hot air is blown out through the hot air holes to uniformly heat the lapping surfaces of the lapping part portions in the crescent-shaped arc-shaped cavity.

[0014] Further, the crescent arc-shaped cavity includes one or more crescent arc-shaped cavities.

[0015] Further, the crescent arc-shaped cavity is two; the ring-shaped plastic fiber plate skin lap joint method is to divide the strip-shaped plastic fiber plate to be made into a ring-shaped plastic fiber plate skin into two pieces, and the two ends of each piece are arc-shaped, so that when the two pieces of strip-shaped plastic fiber plates are combined at the lap joint, two crescent arc-shaped cavities are formed at the two ends; then the strip-shaped plastic fiber plate to be made into a ring-shaped plastic fiber plate skin is placed into the lap joint forming equipment, and the two pieces of strip-shaped plastic fiber plates form two crescent arc-shaped cavities at the two ends in the forming tooling, then two crescent-shaped heating heads are inserted into the two crescent arc-shaped cavities, and the two crescent arc-shaped cavities are heated respectively, so that the lap joint surface of the two pieces of strip-shaped plastic fiber plates is heated, and then the two pieces of strip-shaped plastic fiber plates to be made into a ring-shaped plastic fiber plate skin are pressed together by the forming tooling to form a whole ring-shaped plastic fiber plate skin.

[0016] Further, the strip-shaped plastic fiber plate to be made into a ring-shaped plastic fiber plate skin is divided into two pieces according to the final formed ring-shaped plastic fiber ring, and the ring-shaped plastic fiber ring is divided into two pieces with the end point position of the ring shape as the lap joint center position, and each piece is extended by a lap joint part; and it is ensured that when the two pieces of strip-shaped plastic fiber plates to be made into a ring-shaped plastic fiber plate skin are initially combined, a crescent arc-shaped cavity will be formed at the lap joint of the two ends.

[0017] Further, the two pieces of strip-shaped plastic fiber plates to be made into a ring-shaped plastic fiber plate skin are both arc-shaped at the two ends, and when the end lap arc-shaped parts of the two pieces of strip-shaped plastic fiber plates to be made into a ring-shaped plastic fiber plate skin at the same end are lap jointed, mutual arc-shaped part interference will occur; thus when the two pieces of strip-shaped plastic fiber plates to be made into a ring-shaped plastic fiber plate skin are initially combined in the tooling, a lap joint gap will be formed between the end lap arc-shaped parts, and a crescent arc-shaped cavity will be formed with the lap joint center position as the center.

[0018] Further, the crescent-shaped arc-shaped cavity is one; the two end lap parts of a to-be-made annular plastic fiber plate skin are respectively bent to form an arc line shape, and the arc line shapes of the two ends are ensured to form a crescent-shaped arc-shaped cavity when they are overlapped; the to-be-made annular plastic fiber plate skin is bent and placed in a forming tool, and the overlapping parts are cross-lapped to form a crescent-shaped arc-shaped cavity; a crescent-shaped heating head is inserted into the crescent-shaped arc-shaped cavity to heat the inner surface of the crescent-shaped arc-shaped cavity of the overlapping part, so that the overlapping joint surface of the two strip-shaped plastic fiber plates is heated, and then the two to-be-made annular plastic fiber plate skins are pressed together by the forming tool to form an integral annular plastic fiber plate skin ring.

[0019] Further, the curvature radii of the upper and lower arc surfaces of the crescent-shaped arc-shaped cavity include the same curvature radii of the upper and lower arc surfaces or different curvature radii of the upper and lower arc surfaces.

[0020] Further, the annular plastic fiber plate skin ring lap forming includes the following steps:

[0021] (1) first, the plastic fiber plate is made into a strip-shaped preformed plastic fiber plate according to the requirements of the forming, and the end of the strip-shaped preformed plastic fiber plate is bent and shaped to ensure that the overlapping surface of the overlapping part of the end of the preformed plastic fiber plate can form a crescent-shaped arc-shaped cavity when overlapping;

[0022] (2) the preformed plastic fiber plate is placed in the mold by hand, and the overlapping parts of the plastic fiber plate are overlapped together, so that the upper and lower overlapping surfaces form a crescent-shaped arc-shaped cavity;

[0023] (3) a crescent-shaped heating head matched with the size of the crescent-shaped arc-shaped cavity is adopted, and the crescent-shaped heating head is inserted into the crescent-shaped arc-shaped cavity formed by the two overlapping surfaces through the equipment;

[0024] (4) start heating, hot air is uniformly sprayed onto the overlapping surface of the overlapping part of the plastic fiber plate through the hot air holes of the crescent-shaped heating head, and after reaching the requirement, the heating head stops heating, and the crescent-shaped heating head is withdrawn;

[0025] (5) the system starts the pressure bonding device, and the pressure bonding device bonds the two overlapping part plastic fiber plates together;

[0026] (6) after lap forming, the lap-formed plastic fiber plate is taken out by hand, and an integral annular plastic fiber plate skin ring is made.

[0027] The beneficial effects of the present application are as follows:

[0028] The present application adopts the lap joint mode of plastic fiber plate to manufacture the annular plastic fiber plate skin ring, and the lap joint surface is heated by the crescent-shaped arc-shaped cavity, and then the pressure joint is performed; thus, the following advantages are achieved.

[0029] 1、The present application adopts the lap joint mode of plastic fiber plate to manufacture the annular plastic fiber plate skin ring, thus the size of the annular plastic fiber plate can be determined according to the size required by the annular plastic fiber plate skin ring, the two ends of the plastic fiber plate are bent and formed, and then the formed plastic fiber plate is placed in the determined tool for lap joint; thus, the winding is not required during the manufacturing of the annular plastic fiber plate skin ring, and the winding force is not required, so the rebound problem after the winding force is eliminated is not caused, and thus the annular plastic fiber plate skin ring can be accurately manufactured.

[0030] 2、The present application forms the crescent-shaped arc-shaped cavity in the lap joint part of the plastic fiber plate, and then the lap joint is performed after the heating by the crescent-shaped heating head; thus, only the lap joint surface in the crescent-shaped arc-shaped cavity is locally heated during the lap joint, and the deformation caused by the conventional overall heating is avoided.

[0031] 3、The hot air of the crescent-shaped heating head is blown out from the multiple hot air holes to heat the surface layer of the lap joint part, the lap joint surface is more uniformly heated, the high molecular resin of the lap joint part is better combined, the interlayer bonding force between the composite materials is improved, and thus the lap joint quality is improved.

[0032] 4、The lap joint part is selected to be cut at the arc-shaped top of the annular plastic fiber plate skin ring as the lap joint part, the crescent-shaped arc-shaped cavity can be easily formed during the lap joint; only the arc-shaped lines are formed on the two lap joint parts during the lap joint, and thus the crescent-shaped arc-shaped cavity can be easily formed when the two lap joint parts are placed in the lap joint pressure joint mold.

[0033] 5、When the two-piece lap joint structure is adopted, the plastic fiber plate can also be made into two pieces with the same structure, which is more convenient for the production of parts; of course, the two pieces of plastic fiber plate can also be made into large and small sizes, which does not affect the lap joint effect.

[0034] 6、Compared with the conventional winding method for manufacturing the skin, the automatic operation can be realized, the winding is not required, the work efficiency of the operation can be greatly improved, and the manufacturing cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a structure schematic view of the annular plastic fiber plate skin ring.

[0036] Figure 2 It is a lap joint three-dimensional schematic view of the annular plastic fiber plate skin ring of the present application.

[0037] Figure 3 Fig. 1 is a schematic diagram of the lap joint plane of the annular plastic fiber plate skin ring of the present application;

[0038] Figure 4 Fig. 2 is a schematic diagram of the heating head structure of the present application;

[0039] Figure 5 Fig. 3 is a schematic diagram of the overall structure of the lap joint tool of the present application;

[0040] Figure 6 Fig. 4 is a schematic diagram of the clamping portion of the lap joint tool of the present application;

[0041] Figure 7 Fig. 5 is a process diagram of the lap joint of the annular plastic fiber plate skin ring of the present application;

[0042] Figure 8 Fig. 6 is another schematic diagram of the lap joint of the annular plastic fiber plate skin ring of the present application. DETAILED DESCRIPTION

[0043] The present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] The inventor found in the research of the annular plastic fiber plate skin ring that the method of using lap joint to make the annular plastic fiber plate skin ring can effectively solve the shortcomings of the original winding method. The so-called method of using lap joint to make the annular plastic fiber plate skin ring is to use plastic welding to lap the plastic fiber plates to form the required annular plastic fiber plate skin ring. That is, the plastic fiber plates are pre-fabricated first, and then the annular plastic fiber plate skin ring is formed by lap joint according to the specific size. This method can conveniently control the size of the annular plastic fiber plate skin ring. However, the current plastic welding methods have many ways, such as heating tool welding, induction welding, friction welding, ultrasonic welding, high-frequency welding, hot air welding, etc. However, the existing plastic welding methods directly heat the entire part that needs to be welded by various heating means. The inventor found in the actual use that the existing plastic welding method is difficult to achieve the desired effect. If the welding temperature is increased to the melting point of the plastic fiber plate, the welding effect is the best, but it is easy to cause deformation of the welded part, especially for thin sheet components such as the annular plastic fiber plate skin ring. If the welding temperature is reduced so that the plastic fiber plate is welded below the melting point, it is difficult to achieve good bonding force, so it is very important to control the welding temperature point, which increases the difficulty of making the annular plastic fiber plate skin ring of the lap joint part. Therefore, the inventor proposes a method of making the annular plastic fiber plate skin ring by locally heating the bonding surface of the lap joint part through repeated research. Example 1

[0045] A method for manufacturing a lightweight connecting rod annular plastic fiberboard skin ring, employing an overlapping molding method, firstly, according to the attached... Figure 1 Using the size shown in the figure, and taking the arc-shaped top ends of the annular plastic fiber board skin ring 1 as the dividing points, two pre-formed plastic fiber boards 2 of the same size and length are made. Overlapping portions 5 and 6 are formed at the overlapping positions 3 and 4 at both ends of the pre-formed plastic fiber board 2. The overlapping portions 5 and 6 at both ends of each board are bent into arc shapes, so that when the two pre-formed plastic fiber boards are joined together, two crescent-shaped arc-shaped cavities 7 and 8 are formed at the overlapping ends. The pre-formed plastic fiber boards with the curved overlapping portions are then placed into an overlapping forming device (not shown in the figure, but a conventional pressing device), so that the two pre-formed plastic fiber boards 2 form two crescent-shaped arc-shaped cavities 7 and 8 at both ends in the forming fixture. Then, a heating head 10 (as shown in the attached figure) is used. Figure 4 (As shown) It extends into the two crescent-shaped cavities 7 and 8 (as attached) Figure 5 As shown, the overlapping surfaces 11 of the two crescent-shaped cavities 7 and 8 are locally heated so that the overlapping surfaces 11 of the two pre-formed plastic fiber boards are heated; then the two pre-formed plastic fiber boards 2 are pressed together using the overlapping forming tool to form an integral annular plastic fiber board skin ring.

[0046] It should be noted that:

[0047] The division point using the arc-shaped tops of both ends of the annular plastic fiber board skin ring is based on the characteristics of the annular shape of the lightweight connecting rod's annular plastic fiber board skin ring 1. At the two annular parts 12, the top position 13 of the two annular shapes is used as the midpoint of the overlapping portion. The overlapping portions 5 and 6 are formed by further bending and extending the ends of the two pre-formed plastic fiber boards 2 at the top position 12, and then joining the two pre-formed plastic fiber boards 2 together. The overlapping arc-shaped portions 14 on the two pre-formed plastic fiber boards 2 are combined to form overlapping portions 5 and 6. The length of the overlapping arc-shaped portions 14 is determined according to the strength requirements of the overlap, ensuring that when the two pre-formed plastic fiber boards are placed in the molding fixture, the overlapping arc-shaped portions 14 of the two pre-formed plastic fiber boards 2 at the same end will overlap to form crescent-shaped cavities 7 and 8. The size of the crescent-shaped cavities 7 and 8 depends on the length of the two overlapping arc-shaped portions 14 and the curvature of the curved arc.

[0048] The two pieces of preformed plastic fiber plates are formed by taking the two end arc-shaped top 13 of the annular plastic fiber plate skin ring 1 as the dividing point to form two pieces of preformed plastic fiber plates 2 which are the same in size and length. When the two pieces of preformed plastic fiber plates 2 are combined, the two end arc-shaped top 13 form a cross and a lap joint 5 and 6. In this way, two pieces of preformed plastic fiber plates 2 are made, and then the two pieces of preformed plastic fiber plates 2 are combined to form a lap joint. This facilitates the standardization of preformed plastic fiber plates 2 and the automation of the lap joint.

[0049] The two end heads of each piece need to be bent into an arc shape to form a lap joint. The two ends of the two pieces of preformed plastic fiber plates 2 are bent into an arc shape, one of which is a lap arc portion 14. When the two pieces of preformed plastic fiber plates 2 are placed in the forming tool, the lap arc portions 14 that need to be lapped must not be superimposed, but must be in an interfering state. When the two pieces of preformed plastic fiber plates 2 are initially combined in the tool, the lap joint gap is formed due to the interference of the end lap arc portions 14, forming a crescent-shaped arc-shaped cavities 7 and 8 centered on the lap joint center. The curvature of the arc-shaped lap arc portions 14 at the two ends and the same end can be the same curvature, so that the same two pieces of preformed plastic fiber plates 2 can be made. However, the curvature can also be different, but it must be ensured that the two lap portions can form a crescent-shaped arc-shaped cavities 7 and 8 when lapped in the manufacturing tool. Preferably, the curvature of the arc-shaped lap arc portions 14 at the two ends is the same as the curvature of the annular plastic fiber plate skin ring itself, so that when the two pieces of preformed plastic fiber plates 2 are placed in the mold, the lap arc portions 14 at the ends of the two pieces of preformed plastic fiber plates 2 are misaligned and discharged, the lap arc portions 14 on the outside of the two pieces of preformed plastic fiber plates 2 can be tightly attached to the inner wall of the tool, and the lap arc portions 14 on the inside can be tightly attached to the outside, leaving a lap joint gap between the two lap arc portions 14, forming a crescent-shaped arc-shaped cavities 7 and 8.

[0050] The heating head 10 is inserted into the two crescent-shaped arc-shaped cavities 7 and 8 to heat the air, and the heated air is blown into the crescent-shaped arc-shaped cavities 7 and 8 formed by the lap joint of the two end lap arc portions 14 of the two pieces of preformed plastic fiber plates 2 to locally heat the lap joint surface 11 of the two end lap arc portions 14.

[0051] The heating head 10 is two, respectively arranged in the moon arc shape cavity 7 and 8 formed by the overlapping arc-shaped portion 14 of the end of the preformed plastic fiber plate 2, when the overlapping joint surface 11 of the overlapping arc-shaped portion 14 of the two preformed plastic fiber plate ends needs to be heated locally, the heating head 10 is driven by the driving device to extend into the two moon arc shape cavities 7 and 8, and the two heating heads 10 heat the overlapping joint surface 11 formed by the two moon arc shape cavities 7 and 8 respectively. The head 17 of the heating head 10 has the same shape as the moon arc shape cavity 7 and 8, the inside of the head 17 is hollow, and the heating head 10 has a plurality of hot air holes 16 on the outer surface 15 corresponding to the overlapping joint surface 11 in the moon arc shape cavity 7 and 8. The hot air for heating the overlapping joint surface 11 in the moon arc shape cavity 7 and 8 is blown out from the hot air holes 16 of the head of the heating head 10, and the overlapping joint surface 11 in the moon arc shape cavity 7 and 8 is heated. The head 17 of the heating head 10 is connected to the hot air head driving device 19 of the working equipment (not shown in the figure) through the hollow pipe 18, and the hot air is provided by the working equipment.

[0052] The specific lap forming of the annular plastic fiber plate skin ring includes the following steps (as shown in FIG. 7): Figure 5 、 6

[0053] First, the plastic fiber plate is made into a preformed plastic fiber plate 2 according to the requirements of the required forming, and the preformed plastic fiber plate 2 is required to ensure that when the two preformed plastic fiber plates 2 are placed in the mold, the two ends will lap the two moon arc shape cavities;

[0054] The two preformed plastic fiber plates 2 are placed in the mold by hand, the right side of the two preformed plastic fiber plates 2 is tightly attached to the right mold 21, and the left side is tightly attached to the left mold 20, so that the lapping gap on both sides of the lapping portion is left out, forming two moon arc shape cavities;

[0055] Adjust the heating head 10, press the start button to start the equipment, and the hot air head driving device 19 carries the hot air head 10 to descend, so that the moon-shaped hot air head 10 enters the gap of the two moon arc shape cavities formed by the lapping surface of the preformed plastic fiber plate 2;

[0056] The hot air is transported into the gap of the two moon arc shape cavities by the working equipment through the hot air head 10, and the heating of the lapping joint surface is started. The hot air is uniformly sprayed on the lapping surface 11 of the annular plastic fiber plate skin ring to be made through the hot air holes 16 of the arc-shaped hot air head 10, and the hot air head 10 stops heating when the set requirement is reached. The hot air head 10 rises and exits the two moon arc shape cavities;

[0057] ​Hydraulic system starts, oil cylinder pushes the active inner mold 22 and the active outer mold 23 to cooperate to bond the two plastic fiber plates 2 together;

[0058] After reaching the set pressure, the hydraulic station stops pressurizing;

[0059] The mold remains in the pressed state, and after the holding time is reached, the hydraulic system starts again to release the mold;

[0060] The manually take out the lap formed plastic fiber plate.

[0061] In this embodiment, two annular plastic fiber plates with the same structure are used to bend the two ends into arc shapes, and then a crescent-shaped arc-shaped cavity for forming the lap portion is placed in the forming mold. The hot air of the crescent-shaped arc-shaped heating head uniformly heats the bonding surface of the lap portion. In this way, the heating degree of the bonding surface of the two plastic fiber plates is consistent during lap pressure bonding, and the lap effect is also consistent. This can effectively improve the uniformity of heating, increase the uniformity of interlayer bonding of the lap surface, and effectively prevent deformation during pressure bonding. At the same time, the annular plastic fiber plate is made into two parts with the same structure, and the top is cut to separate the two parts. This method of making an annular plastic fiber plate skin ring by separating two preformed plastic fiber plates can use the same two preformed plastic fiber plates for lap bonding. In this way, the annular plastic fiber plate can be made into a standard part to realize automatic operation. Embodiment Two

[0062] The lap principle of embodiment two is the same as that of embodiment one, except that a whole preformed plastic fiber plate 201 is used to make an annular plastic fiber plate skin ring instead of two preformed plastic fiber plates. A thrust rod annular plastic fiber plate skin ring is formed by a strip-shaped preformed plastic fiber plate 201. The strip-shaped preformed plastic fiber plate 201 is formed by forming the two end lap portions 202 of a whole preformed plastic fiber plate 201 into an arc shape, and then arranging and combining the two end lap portions 202 in an up-down manner to form a crescent-shaped arc-shaped cavity 203 during lap bonding. The inner surface 204 of the crescent-shaped arc-shaped cavity 203 is uniformly heated by a heating device, and then the lap portion is pressure bonded to form an annular plastic fiber plate skin ring, thereby forming a whole thrust rod annular plastic fiber plate skin ring.

[0063] The crescent-shaped arc-shaped cavity formed at the lap joint is that the lap joint parts 202 of the strip-shaped plastic fiber plate 201 to be made into a ring-shaped plastic fiber plate skin ring are respectively made into curved arc surfaces, then the strip-shaped plastic fiber plate 201 to be made into a ring-shaped plastic fiber plate skin ring is placed in a forming device, and when the strip-shaped plastic fiber plate is lapped, the curved arc surfaces of the lap joint parts 202 are lapped together in a staggered manner to form a crescent-shaped arc-shaped cavity 203.

[0064] The uniform heating of the lap joint inner surface of the arc-shaped cavity 203 by the heating device is that a crescent-shaped heating head matched with the crescent-shaped arc-shaped cavity formed by the lap joint part is inserted into the crescent-shaped arc-shaped cavity, and the lap joint surface of the lap joint part in the crescent-shaped arc-shaped cavity is heated by blowing hot air by the crescent-shaped heating head.

[0065] The hot air blown by the crescent-shaped heating head is that a plurality of hot air holes are respectively opened on the part of the crescent-shaped heating head facing the lap joint surface of the lap joint part in the crescent-shaped arc-shaped cavity according to the requirement of heating hot air, so that the hot air is blown out through the hot air holes to uniformly heat the lap joint surface of the lap joint part in the crescent-shaped arc-shaped cavity.

[0066] The two pieces of ring-shaped plastic fiber plate skin ring to be made are two pieces of ring-shaped plastic fiber plate skin ring with arc-shaped ends, but the curvatures of the arc-shaped ends are different. When placed in the forming tool, the two pieces of ring-shaped plastic fiber plate skin ring are matched together with the arc-shaped ends of different curvature radii, so that the crescent-shaped arc-shaped cavities are respectively formed at the two ends.

[0067] The two pieces of ring-shaped plastic fiber plate skin ring to be made are two pieces of ring-shaped plastic fiber plate skin ring with arc-shaped ends, but the curvatures of the arc-shaped ends are different. When placed in the forming tool, the two pieces of ring-shaped plastic fiber plate skin ring are matched together with the arc-shaped ends of different curvature radii, so that the crescent-shaped arc-shaped cavities are respectively formed at the two ends.

[0068] The lap joint forming of the thrust rod ring-shaped plastic fiber plate skin ring includes the following steps:

[0069] (1) First, the plastic fiber plate is made into a strip-shaped preformed plastic fiber plate according to the requirement of forming, and the end of the strip-shaped preformed plastic fiber plate is bent and shaped to ensure that the lap joint surface of the end of the preformed plastic fiber plate can form a crescent-shaped arc-shaped cavity when lapped;

[0070] (2) manually put the preformed plastic fiber plate into the mold, and make the overlapping parts of the plastic fiber plate overlap each other, so that the upper and lower overlapping surfaces form a crescent-shaped arc-shaped cavity;

[0071] (3) a crescent-shaped heating head matched with the size of the crescent-shaped arc-shaped cavity is adopted, and the crescent-shaped heating head is inserted into the crescent-shaped arc-shaped cavity formed by the overlapping surfaces through the equipment;

[0072] (4) start heating, and hot air is uniformly sprayed on the overlapping surfaces of the overlapping parts of the plastic fiber plate through the hot air holes of the crescent-shaped heating head, and after reaching the requirement, the heating head stops heating, and the crescent-shaped heating head is withdrawn;

[0073] (5) the system starts the crimping device, and the crimping device bonds the two pieces of plastic fiber plate in the overlapping parts together;

[0074] (6) after the overlapping and forming, the plastic fiber plate with overlapping and forming is manually taken out, and a whole ring of the annular plastic fiber plate skin ring is made.

[0075] It should be further explained that the above-mentioned embodiments are only used to clearly and completely describe the technical solutions of the present application in combination with the drawings; obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments, and the terms such as "upper", "lower", "front", "rear", "middle" and the like cited in the specification are only for the convenience of clear description, not to limit the scope of the present application, and the change or adjustment of the relative relationship does not change the technical content, and is also regarded as the implementation scope of the present application. At the same time, the structure, proportion, size and the like shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the present application, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effect and purpose of the present application, should still fall within the scope of the technical content disclosed by the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0076] The beneficial effects of the present application are:

[0077] The present application uses the overlapping method of plastic fiber plate to make the annular plastic fiber plate skin ring, and heats the overlapping surface through the crescent-shaped arc-shaped cavity, and then performs crimping; in this way, there are some advantages as follows:

[0078] 1、The present application adopts the lap joint mode of plastic fiber plate to manufacture the annular plastic fiber plate skin ring, so that the size of the annular plastic fiber plate can be determined in advance according to the size required by the annular plastic fiber plate skin ring, the two ends of the plastic fiber plate are bent and formed respectively, and then the formed plastic fiber plate is placed in the determined tool for lap joint; thus, winding is no longer needed during the manufacturing of the annular plastic fiber plate skin ring, and the winding force during winding is also no longer existed, so the rebound problem after the elimination of the winding force is also no longer existed, thereby the annular plastic fiber plate skin ring can be accurately manufactured;

[0079] 2、The present application forms a crescent-shaped arc-shaped cavity in the lap joint part of the plastic fiber plate, and then heats through the crescent-shaped heating head, and then performs lap joint; thus, only the lap joint surface in the crescent-shaped arc-shaped cavity can be locally heated during lap joint, and the deformation easily occurred during conventional overall heating is avoided;

[0080] 3、The hot air of the crescent-shaped heating head is blown out from multiple hot air holes to heat the surface layer of the lap joint part, so that the lap joint surface can be more uniformly heated, the high molecular resin of the lap joint part is better combined, the interlayer bonding force between the composite materials is improved, and thus the lap joint quality is improved; the bonding surface of the lap joint part of the two plastic fiber plates can be uniformly heated;

[0081] 4、The lap joint part of the present application is selected to be cut at the arc-shaped top of the annular plastic fiber plate skin ring as the lap joint part, so that the crescent-shaped arc-shaped cavity can be easily formed during lap joint; only the arc-shaped line of the two lap joint parts needs to be formed during lap joint, so that the crescent-shaped arc-shaped cavity can be easily formed when placed in the lap joint pressure joint mold

[0082] 5、When the two-lap joint structure is adopted, the plastic fiber plate can also be made into two pieces with the same structure, so that the production of parts is more convenient; of course, the two pieces of plastic fiber plate can also be made into large and small sizes, which does not affect the lap joint effect;

[0083] 6、Compared with the conventional winding method for manufacturing the skin, the present application can realize automatic operation, does not need winding, can greatly improve the work efficiency of operation, and reduces the manufacturing cost.

Claims

1. A method of splicing and forming a ring-shaped plastic fiber sheet skin, the ring-shaped plastic fiber sheet skin being spliced and formed by a strip-shaped plastic fiber sheet, characterized by: The strip-shaped plastic fiber plate lap joint forming is to shape the lap joint part of the strip-shaped plastic fiber plate, form a crescent-shaped arc-shaped cavity at the lap joint, uniformly heat the inner surface of the crescent-shaped arc-shaped cavity by a heating device, and then press the lap joint part to form a ring-shaped plastic fiber plate skin ring. ​ 2. The method for overlapping and forming annular plastic fiberboard skin rings as described in claim 1, characterized in that: The crescent-shaped arc-shaped cavity is formed by first making the lap joint part of the strip-shaped plastic fiber plate to be made into a ring-shaped plastic fiber plate skin ring into a curved arc-shaped surface, then placing the strip-shaped plastic fiber plate to be made into a ring-shaped plastic fiber plate skin ring in a forming device, and making the curved arc-shaped surfaces of the lap joint part of the strip-shaped plastic fiber plate to be made into a ring-shaped plastic fiber plate skin ring abut each other when the strip-shaped plastic fiber plate is lapped to form a crescent-shaped arc-shaped cavity.

3. The method of claim 1, wherein the method further comprises: The inner surface of the arc-shaped cavity is uniformly heated by the heating device by inserting a crescent-shaped heating head matched with the crescent-shaped arc-shaped cavity formed by the lap joint part into the crescent-shaped arc-shaped cavity and heating the lap joint surface in the crescent-shaped arc-shaped cavity by blowing hot air from the crescent-shaped heating head.

4. The method for overlapping and forming annular plastic fiberboard skin rings as described in claim 3, characterized in that: The hot air is blown by the crescent-shaped heating head by opening a plurality of hot air holes on the part of the crescent-shaped heating head facing the lap joint surface of the lap joint part in the crescent-shaped arc-shaped cavity according to the heating air requirement, so that the hot air is blown out through the hot air holes to uniformly heat the lap joint surface of the lap joint part in the crescent-shaped arc-shaped cavity.

5. The method of claim 1 wherein: the ring of plastic fiberboard skin is formed by overlapping and joining the edges of the ring of plastic fiberboard skin. The crescent-shaped arc-shaped cavity includes more than one crescent-shaped arc-shaped cavity. ​ 6. The method of splicing and forming a ring of plastic fibrous sheeting as defined in claim 5, wherein: The crescent-shaped arc-shaped cavity is two; the ring-shaped plastic fiber plate skin ring lap joint method is to divide the strip-shaped plastic fiber plate to be made into a ring-shaped plastic fiber plate skin ring into two pieces, and make the two ends of each piece arc-shaped, so that when the two pieces of strip-shaped plastic fiber plate are combined, two crescent-shaped arc-shaped cavities are formed at the two end lap joints. Then, the strip-shaped plastic fiber plate to be made into a ring-shaped plastic fiber plate skin ring is placed in a lap joint forming equipment, and the two pieces of strip-shaped plastic fiber plate form two crescent-shaped arc-shaped cavities at the two ends in the forming tooling, then two crescent-shaped heating heads are inserted into the two crescent-shaped arc-shaped cavities to heat the two crescent-shaped arc-shaped cavities respectively, so that the lap joint surfaces of the two pieces of strip-shaped plastic fiber plate are heated, and then the two pieces of strip-shaped plastic fiber plate to be made into a ring-shaped plastic fiber plate skin ring are pressed together by the forming tooling to form a whole ring-shaped plastic fiber plate skin ring.

7. The method of splicing and forming a ring of plastic fibrous sheeting as defined in claim 6, wherein: The strip-shaped plastic fiber plate to be made into a ring-shaped plastic fiber plate skin ring is divided into two pieces according to the final formed ring-shaped plastic fiber ring, the ring-shaped plastic fiber ring is divided into two pieces with the ring-shaped end point position as the lap joint center position, and each piece is extended by a certain length to form a lap joint part; and it is ensured that when the two pieces of strip-shaped plastic fiber plate to be made into a ring-shaped plastic fiber plate skin ring are initially combined, a crescent-shaped arc-shaped cavity will be formed at each of the two end lap joints.

8. The method for overlapping and forming annular plastic fiberboard skin rings as described in claim 7, characterized in that: The end point position of the ring shape is divided into two pieces as the lap joint center position, which is to make both ends of the two pieces of the ring-shaped plastic fiber plate skin to be made into arc shape, and when the two pieces of the ring-shaped plastic fiber plate skin to be made are put into the forming tool, the end lap arc-shaped parts of the two pieces of the ring-shaped plastic fiber plate skin to be made at the same end will interfere with each other when they are lapped together. Thus, when the two pieces of the ring-shaped plastic fiber plate skin to be made are initially combined in the tool, the end lap arc-shaped parts will form a lap gap, which constitutes a crescent-shaped arc-shaped cavity with the lap joint center position as the center.

9. The method for overlapping and forming annular plastic fiberboard skin rings as described in claim 5, characterized in that: The crescent-shaped arc-shaped cavity is one; the two end lap parts of the ring-shaped plastic fiber plate skin to be made are respectively bent into arc lines, and the arc lines at both ends can form a crescent-shaped arc-shaped cavity when they are lapped together; then the ring-shaped plastic fiber plate skin to be made is bent and put into the forming tool, and the lap parts are crossed and lapped to form a crescent-shaped arc-shaped cavity.

10. The method of splicing and forming a loop of a plastic fibrous sheet material according to any one of claims 1 to 9, wherein: The curvature radii of the upper and lower arc surfaces of the crescent-shaped arc-shaped cavity include the same curvature radii of the upper and lower arc surfaces or different curvature radii of the upper and lower arc surfaces.

11. The method of splicing and forming a loop of plastic fibrous sheet material as defined in claim 1 wherein: The ring-shaped plastic fiber plate skin lap forming includes the following steps: (1) First, the plastic fiber plate is made into a strip-shaped preformed plastic fiber plate according to the requirements of the required forming, and the end of the strip-shaped preformed plastic fiber plate is bent and shaped to ensure that the lap surface of the end lap part of the preformed plastic fiber plate can form a crescent-shaped arc-shaped cavity when lapped; (2) The preformed plastic fiber plate is put into the mold by hand, and the lapped parts of the plastic fiber plate are lapped together, and the upper and lower lapped surfaces form a crescent-shaped arc-shaped cavity; (3) A crescent-shaped heating head with a size matching the crescent-shaped arc-shaped cavity is used, and the crescent-shaped heating head is inserted into the crescent-shaped arc-shaped cavity formed by the two lapped surfaces through the equipment; (4) Start heating, hot air is uniformly sprayed onto the lapped surface of the lapped part of the plastic fiber plate through the hot air holes of the crescent-shaped heating head, and after reaching the required temperature, the heating head stops heating and the crescent-shaped heating head is withdrawn; (5) The system starts the pressure bonding device, which bonds the two lapped parts of the plastic fiber plate together; (6) After lap forming, the lapped and formed plastic fiber plate is taken out by hand, and a complete ring-shaped plastic fiber plate skin ring is made.

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