Hot plate cross welding equipment for PP (polypropylene) shell of sun shield

Abstract

The utility model relates to the field of automobile sun shields, and particularly discloses a hot plate cross welding device for a PP shell of a sun shield, which comprises a hot plate for hot melting welding surfaces of plastic parts, and a fixed carrying table and an overturning carrying table for respectively loading two plastic parts, the overturning carrying table and the fixed carrying table are distributed side by side, the two carrying tables are positioned below the hot plate, and the overturning carrying table is positioned below the hot plate. The heat plate can be connected with a lifting driving part, the lifting driving part is used for driving the heat plate to ascend and descend so as to be close to or away from the plastic parts located on the two carrying tables, and the turnover carrying table is rotationally arranged, has a heating position and a welding position, is located at the heating position and is matched with the heat plate to carry out hot melting treatment on the welding surfaces of the two plastic parts; and the overturning platform is located at the welding position, and the two plastic parts are subjected to mold closing welding. The welding device has the advantages that the plastic parts are tightly buckled, welding is firm, and the welding efficiency is high.

Description

Technical Field

[0001] The present application relates to the field of automobile sun visors, and in particular to a hot plate cross welding device for a PP shell of a sun visor. Background Art

[0002] Currently, both the main driver's seat and the co-driver's seat of a car are equipped with sun visors. When the car is driving towards the sun, the angle of the sun visor can be adjusted by bending the sun visor, which can block the sunlight to a certain extent.

[0003] Polypropylene (PP), as a plastic material, has been widely used in the manufacture of car sun visors because of its low production cost, corrosion resistance, high temperature resistance, etc. Car sun visors made of PP (polypropylene) are usually connected by thermal welding because PP material is thermoplastic and can be melted and connected together by heat.

[0004] Common sun visors are made of two plastic parts welded together. Most of the heat welding methods used are hot plate welding. When using a hot plate welding machine, the heating plate is placed between the welding surfaces of the two plastic parts. When the plastic parts are close to the heating plate, the plastic begins to melt. After a pre-set heating time, the surface of the plastic parts will reach a certain melting degree. At this time, the plastic parts are moved to separate them from the hot plate, and then the heating plate is removed to piece together the welded surfaces of the two workpieces that have been melted by heat. When a certain welding time and welding depth are reached, the entire welding process is completed.

[0005] After heating, the workpiece needs to be separated from the heating plate first, and then the heating plate needs to be removed from between the two plastic parts before the two plastic parts can be combined. In this process, part of the heat has been dissipated, and the firmness of the welding of the two plastic parts will be affected during the combination process. At the same time, due to the complicated process, the welding efficiency is low. Utility Model Content

[0006] In order to improve the welding effect of two plastic parts of the sun visor, the present application provides a hot plate cross welding device for the PP shell of the sun visor, which has the advantages of tight fitting of plastic parts, firm welding and high welding efficiency.

[0007] The hot plate cross welding equipment for the sun visor PP shell provided in this application adopts the following technical solution:

[0008] A hot plate cross-welding device for a sun visor PP shell, comprising a hot plate for melting the welding surfaces of plastic parts, a fixed stage and a rotating stage for respectively loading two plastic parts. The hot plate is arranged to be lifted and lowered, and the rotating stage is arranged to rotate. The rotating stage has a heating position and a welding position. When the rotating stage is in the heating position, the end faces of the plastic parts used to be carried by the rotating stage and the fixed stage are kept parallel to cooperate with the hot plate to perform hot melting treatment on the plastic parts. When the rotating stage is in the welding position, the welding surfaces of the plastic parts on the rotating stage are in contact with the welding surfaces of the plastic parts on the fixed stage to perform die closing welding on the two plastic parts.

[0009] By adopting the above technical solution, after the hot plate melts the welding surfaces of the plastic parts, the hot plate rises and disengages from the plastic parts. At this time, the rotating stage is rotated to enter the welding position, and then die closing welding can be performed on the two plastic parts. Compared with the traditional welding device that needs to wait for the hot plate to move away from between the two plastic parts, the time from the completion of hot melting of the plastic parts to the start of welding is shortened, the heat dissipation of the welding surfaces of the plastic parts after hot melting is reduced, the firmness of the welding between the two plastic parts is ensured, and thus the welding quality is improved, and the overall structural strength of the plastic parts after welding is improved.

[0010] Optionally, both the fixed stage and the rotating stage are provided with bearing parts, and the two plastic parts are respectively attached to the two bearing parts. A plurality of first clamping blocks for clamping the plastic parts are arranged on the fixed stage around the plastic parts, and a plurality of second clamping blocks for clamping the plastic parts are arranged on the rotating stage around the plastic parts.

[0011] By adopting the above technical solution, the use of the bearing parts attached to the plastic parts can improve the quality of the plastic parts during hot melting and die closing welding, ensuring uniform force on each part of the plastic parts; in addition, the use of the first clamping blocks and the second clamping blocks can realize the clamping and loading of the two plastic parts, improving the stability of the two plastic parts on the two stages.

[0012] Optionally, when the rotating stage is in the welding position, the first clamping blocks and the second clamping blocks are staggered around the plastic parts.

[0013] By adopting the above technical solution, the first clamping blocks and the second clamping blocks avoid each other during the buckling process of the two stages, so as to improve the buckling tightness of the two stages.

[0014] Optionally, two rotating shafts are coaxially arranged at both ends of the rotating stage, and one of the rotating shafts is connected with a flipping driving assembly, and the flipping driving assembly is used to drive the rotating stage to switch between the heating position and the welding position.

[0015] By adopting the above technical solution, the flipping driving assembly drives the rotating stage to switch between the heating position and the welding position, and cooperates with the driving part to perform automatic welding, improving the welding efficiency and quality.

[0016] Optionally, the flipping drive assembly includes a first telescopic drive member, a gear, and a rack. The gear is coaxially fixed to one of the rotating shafts, and the rack is fixed to the movable end of the first telescopic drive member and meshes with the gear.

[0017] By adopting the above technical solution, the first telescopic drive member drives the rack to move linearly, so as to drive the gear to rotate, and cooperate with the rotating shaft to realize the rotation of the flipping table. The cooperation precision is high and the structural cost is low, and the precise switching between two positions of the flipping table can be realized.

[0018] Optionally, the flipping drive assembly includes a servo motor, and the output shaft of the servo motor is connected to one of the rotating shafts and rotates synchronously.

[0019] By adopting the above technical solution, the flipping table is driven by the servo motor, the structure is more concise, and the servo motor can achieve very precise position control, has strong overload resistance, and can keep the tendency of pressing between the two tables.

[0020] Optionally, it further includes a pressing assembly. The pressing assembly has at least one movable end, and the at least one movable end is used to abut against the flipping table at the welding position and press the flipping table against the fixed table.

[0021] By adopting the above technical solution, the two tables are pressed by the pressing assembly, so that the welding surfaces of the two plastic parts can be completely and tightly attached to improve the welding quality of the two plastic parts.

[0022] Optionally, the pressing assembly includes a pressing head, a mounting shaft, and a second telescopic drive member. The mounting shaft is rotatably arranged. The pressing head is fixed to the mounting shaft and is used as the movable end to abut against the flipping table. The second telescopic drive member is used to drive the mounting shaft to rotate.

[0023] By adopting the above technical solution, the second telescopic drive member drives the mounting shaft to rotate, and then drives the pressing head to rotate and abut against the side of the flipping table away from the fixed table to press the two tables and improve the welding quality.

[0024] Optionally, it further includes an equipment outer frame, a top plate, and a bottom plate. There may be a cavity for accommodating each component inside the equipment outer frame. The top plate is arranged to be lifted and lowered inside the cavity. The hot plate is connected to the top plate. The bottom plate is fixed inside the cavity. The fixed table and the flipping table are arranged on the bottom plate.

[0025] By adopting the above technical solution, the positions and layouts of each component are optimized, which is convenient for the arrangement and implementation of the overall structure.

[0026] Optionally, a plurality of support components are provided between the bottom plate and the flipping and rotating table. One end of each support component is fixed to the bottom plate, and the other end abuts against the side of the flipping and rotating table away from the plastic part. The support components are used to adjust the distance between the flipping and rotating table and the bottom plate.

[0027] By adopting the above technical solution, the support components provide support for the flipping and rotating table from below. By adjusting the length, the heating position of the flipping and rotating table can be slightly changed to improve the adaptability to the plastic part, thereby improving the matching accuracy between the plastic part and the hot plate.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. After the hot plate melts the welding surface of the plastic part, the hot plate rises and separates from the plastic part. At this time, the flipping and rotating table is rotated into the welding position, and the two plastic parts can be clamped and welded. Compared with the traditional welding equipment that needs to wait for the hot plate to move away from between the two plastic parts, the time from the completion of melting to the start of welding of the plastic part is shortened, the heat dissipation of the welding surface after melting of the plastic part is reduced, the firmness of the welding between the two plastic parts is ensured, thereby improving the welding quality and the overall structural strength of the plastic part after welding;

[0030] 2. The flipping drive assembly drives the flipping and rotating table to switch between the heating position and the welding position, and cooperates with the driving part for automatic welding, improving the welding efficiency and quality;

[0031] 3. The two platforms are clamped by the pressing component, so that the welding surfaces of the two plastic parts can be completely and tightly fitted, so as to improve the welding quality of the two plastic parts. Description of the Drawings

[0032] Figure 1 is the overall structural schematic diagram of Embodiment 1 of the present application;

[0033] Figure 2 is the schematic diagram showing the position of the hot plate during heating in Embodiment 1 of the present application;

[0034] Figure 3 is the schematic diagram showing the heating position of the flipping and rotating table in Embodiment 1 of the present application;

[0035] Figure 4 is the schematic diagram showing the welding position of the flipping and rotating table in Embodiment 1 of the present application;

[0036] Figure 5 is the schematic diagram showing the installation structure of the hot plate in Embodiment 1 of the present application;

[0037] Figure 6 is the schematic diagram showing the flipping drive assembly in Embodiment 2 of the present application.

[0038] Reference numerals: 1, hot plate; 2, fixed stage; 21, first clamping block; 3, rotating stage; 31, second clamping block; 311, clamping portion; 312, adjusting portion; 32, rotating shaft; 4, lifting driving member; 6, mounting hole; 7, flipping driving assembly; 71, first telescopic driving member; 72, gear; 73, rack; 74, rotating driving member; 8, pressing assembly; 81, pressing head; 82, mounting shaft; 83, second telescopic driving member; 9, supporting assembly; 91, supporting sleeve; 92, adjusting rod; 10, equipment outer frame; 11, top plate; 12, bottom plate; 13, mounting seat; 14, mounting block; 15, third telescopic driving member; 16, positioning rod; 17, positioning sleeve; 18, support rod; 19, connecting plate; 20, mounting plate. Detailed implementation manners

[0039] The following further elaborates on this application Figure 1-6 in conjunction with the attached drawings.

[0040] Embodiment 1:

[0041] The embodiment of this application discloses a hot plate cross-welding device for a sun visor PP shell. Referring to Figure 1 and Figure 2 , it includes a hot plate 1 for melting the welding surfaces of plastic parts, a fixed stage 2 and a rotating stage 3 for respectively loading two plastic parts. The rotating stage 3 and the fixed stage 2 are arranged side by side, and the two stages are located below the hot plate 1. The hot plate 1 can be connected to a lifting driving member 4, and the lifting driving member 4 is used to drive the hot plate 1 to lift, so as to approach or move away from the plastic parts located on the aforementioned two stages. With the help of the lifting driving member 4, the hot plate 1 simultaneously contacts the welding surfaces of the two plastic parts to melt the welding surfaces of the two plastic parts.

[0042] In addition, referring to Figure 3 and Figure 4 , the rotating stage 3 is rotatably arranged. The rotating stage 3 has a heating position and a welding position. During the operation of the welding device, the rotating stage 3 repeatedly switches between the two positions. When the rotating stage 3 is in the heating position, the end faces of the rotating stage 3 and the fixed stage 2 for carrying plastic parts are kept parallel to cooperate with the hot plate 1 to simultaneously perform hot melting treatment on the welding surfaces of the two plastic parts; when the rotating stage 3 is in the welding position, the rotating stage 3 is located above the fixed stage 2 and the two are buckled together. At this time, the welding surfaces of the two plastic parts located on the two stages are in contact with each other to perform mold closing welding on the two plastic parts.

[0043] After melting the welding surfaces of the two plastic parts by using the lifting driving member 4, the hot plate 1 is driven to disengage from the welding surfaces of the plastic parts. At this time, the rotating stage 3 is in the heating position; then the rotating stage 3 is rotated so that the rotating stage 3 is buckled above the fixed stage 2, and the rotating stage 3 enters the welding position. At this time, the welding surfaces of the two plastic parts after hot melting are in contact with each other. After maintaining for a certain period of time, the welding is completed.

[0044] Specifically, referring to Figure 3 and Figure 4 , a bearing portion is provided on both the fixed stage 2 and the rotating stage 3. The two bearing portions are respectively adapted to the shapes of the two plastic parts, that is, the two bearing portions are respectively attached to the sides of the two plastic parts away from the welding surface. At the same time, first clamping blocks 21 are provided on the fixed stage 2 on the peripheral sides of the plastic parts, and second clamping blocks 31 are provided on the rotating stage 3 on the peripheral sides of the plastic parts, and the first clamping blocks 21 and the second clamping blocks 31 have an adjustment range of approaching or separating from the plastic parts.

[0045] When the first clamping blocks 21 and the second clamping blocks 31 both abut against the peripheries of the plastic parts, the two plastic parts are respectively clamped and fixed on the two stages, improving the stability of the plastic parts on the stages, and cooperating with the flipping action of the rotating stage 3 to prevent the plastic parts from detaching and falling from the rotating stage 3.

[0046] Moreover, the first clamping blocks 21 and the second clamping blocks 31 are arranged in an alternating manner around the plastic parts. That is, when the two stages are buckled, the first clamping blocks 21 and the second clamping blocks 31 are alternately distributed around the plastic parts, and the first clamping blocks 21 and the second clamping blocks 31 avoid each other during the buckling process of the two stages to improve the tightness of the buckling of the two stages.

[0047] Furthermore, referring to Figure 3 and Figure 4 , mounting holes 6 are formed in both the first clamping blocks 21 and the second clamping blocks 31, and the mounting holes 6 are waist-shaped holes, and the length direction of the waist-shaped holes is approximately perpendicular to the side edges of the plastic parts. During installation, bolts are passed through the mounting holes 6 and screwed into the two stages respectively to fix the first clamping blocks 21 and the second clamping blocks 31, and the positions of the first clamping blocks 21 and the second clamping blocks 31 can be adjusted by loosening the bolts to release or clamp the plastic parts.

[0048] In addition, it should be noted that the second clamping block 31 on the side of the rotating stage 3 away from the fixed stage 2 includes a clamping portion 311 and an adjusting portion 312 formed integrally. The clamping portion 311 penetrates through the rotating stage 3 and is used to abut against the plastic part. The adjusting portion 312 is located on the side of the rotating stage 3 away from the plastic part and extends to both sides of the clamping portion 311. The mounting holes 6 are formed in the portions of the adjusting portion 312 on both sides of the clamping portion 311;

[0049] The second clamping blocks 31 located on one side of the turning stage 3 close to the fixed stage 2 and the second clamping blocks 31 located on the side of the turning stage 3 away from the fixed stage 2 cooperate with each other to clamp the plastic parts, and the remaining second clamping blocks 31 only provide a limiting function and do not press tightly against the plastic parts. After the two plastic parts are clamped and welded, at this time, the side of the turning stage 3 away from the plastic parts faces upward. By loosening the bolts fixed on the adjusting part 312, the second clamping blocks 31 can release the plastic parts, so as to reset the turning stage 3 and perform demolding.

[0050] To improve the hot melting effect of the plastic parts, in this embodiment, two hot plates 1 are provided, and the end faces of the two hot plates 1 for contacting the plastic parts are adapted to the welding surfaces of the plastic parts. When the hot plate 1 contacts the corresponding plastic part, the welding surface of the hot plate 1 just fits the plastic part. In other embodiments, the hot plate 1 can also be provided as one piece, and the end face for contacting the plastic part can be configured to the corresponding shapes of the two plastic parts.

[0051] In this embodiment or other embodiments, the turning stage 3 can be connected to a turning drive assembly 7, and the turning drive assembly 7 is used to drive the turning stage 3 to switch between the heating position and the welding position, cooperate with the driving part for automatic welding, and improve the welding efficiency and quality. Refer to Figure 3 and Figure 4 , rotating shafts 32 are fixed at both ends of the turning stage 3, and the two rotating shafts 32 are coaxially arranged, which are used to rotatably install the turning stage 3 and are convenient for connecting the turning drive assembly 7.

[0052] Refer to Figure 3 and Figure 4 , in this embodiment, the turning drive assembly 7 includes a first telescopic drive part 71, a gear 72 and a rack 73. The gear 72 is coaxially fixed to one of the rotating shafts 32, the rack 73 is fixed to the movable end of the first telescopic drive part 71, and the rack 73 meshes with the gear 72. The first telescopic drive part 71 drives the rack 73 to move linearly to drive the gear 72 to rotate, and cooperate with the rotating shaft 32 to realize the rotation of the turning stage 3. The first telescopic drive part 71 can be selected from mechanisms such as cylinders, oil cylinders, electric push rods, and linear guides that can provide reciprocating driving force along a straight line.

[0053] It should be added that when the turning drive assembly 7 drives the turning stage 3 into the welding position, a certain driving force can be maintained so that the turning stage 3 has a tendency to press tightly against the fixed stage 2 to realize the pressure maintaining function and improve the quality of the clamped and welded parts.

[0054] Furthermore, a pressing assembly 8 can be provided at the fixed stage 2. The pressing assembly 8 has at least one movable end, and the at least one movable end is used to abut against the turning stage 3 at the welding position and press it tightly on the fixed stage 2, so that the welding surfaces of the two plastic parts can be completely and tightly fitted to improve the welding quality of the two plastic parts.

[0055] In this embodiment, with reference to Figure 2 and Figure 4 , the pressing assembly 8 may include a pressing head 81, a mounting shaft 82, and a second telescopic driving member 83. The mounting shaft 82 is rotatably arranged. The pressing head 81 is fixed to the mounting shaft 82 and serves as the movable end of the pressing assembly 8 to abut against the turning table 3 located at the welding position. The housing of the second telescopic driving member 83 is rotatably arranged, and its movable end is rotatably mounted on the side wall of the mounting shaft 82, and the telescopic direction of the movable end is perpendicular to the axis of the mounting shaft 82. The movable end of the second telescopic driving member 83 provides a driving force along the direction perpendicular to the axis of the mounting shaft 82 on the side wall of the mounting shaft 82 through telescoping, drives the mounting shaft 82 to rotate, and then drives the pressing head 81 to rotate and abut against the side of the turning table 3 away from the fixed table 2, so as to press the two tables tightly.

[0056] Preferably, the pressing head 81 may be set as a U-shaped structure. The mounting shaft 82 and the second telescopic driving member 83 may be arranged below the fixed table 2. One end of the U-shaped structure of the pressing head 81 is fixed to the mounting shaft 82, and the other end is used to abut against the turning table 3. When the pressing head 81 presses the turning table 3, part of the two tables is located within the U-shaped opening of the pressing head 81, that is, the two ends of the pressing head 81 are respectively located above and below the fixed table 2. The above structural arrangement can effectively reduce the space occupied by the overall structure and improve the compactness of the structure. In addition, the pressing head 81 may be configured with different numbers according to needs. In this embodiment, two are provided and are symmetrically distributed along the side of the fixed table 2.

[0057] It should be supplemented that the aforementioned structures such as the fixed table 2, the turning table 3, the mounting shaft 82, the second telescopic driving member 83, and the turning driving assembly 7 may be arranged on any fixed structures such as frames, plates, cabinets, and countertops for supporting, installing, or accommodating this equipment.

[0058] With reference to Figure 1 , for the convenience of the layout and implementation of the welding equipment, a hot plate cross-welding equipment for a sun visor PP shell in this embodiment may further include an equipment outer frame 10, a top plate 11, and a bottom plate 12. The inside of the equipment outer frame 10 may have a cavity for accommodating various components, and this cavity communicates with the outside to facilitate the loading and unloading of plastic parts; the bottom plate 12 is fixed inside the cavity of the equipment outer frame 10, and the fixed table 2, the turning table 3, the turning driving assembly 7, and the pressing assembly 8 are all arranged on the bottom plate 12; the lifting driving member 4 is fixed to the top of the equipment outer frame 10, and its movable end extends vertically downward. The top plate 11 is fixed to the movable end and is located inside the cavity of the outer frame. The hot plate 1 is connected to the side of the top plate 11 close to the bottom plate 12, and the driving member drives the top plate 11 and the hot plate 1 to move back and forth inside the above cavity.

[0059] Among them, the fixed stage 2 is fixed to the bottom plate 12 through two mounting seats 13. A certain space is formed between the fixed stage 2 and the bottom plate 12 for accommodating the mounting and pressing assembly 8. Two mounting blocks 14 are fixed on the bottom plate 12. Two rotating shafts 32 of the flipping stage 3 are passed through and rotatably mounted on the two mounting blocks 14. One of the rotating shafts 32 penetrates the mounting block 14 and is connected to the flipping driving assembly 7. The housing of the second telescopic driving member 83 is rotatably mounted on the bottom plate 12 through a hinge seat. Moreover, a hinge seat is also fixed on the side wall of the mounting shaft 82 and is hinged to the movable end of the second telescopic driving member 83. The two hinge seats provide a larger swinging space for the second telescopic driving member 83 and optimize the structural layout.

[0060] Further, referring to Figure 2 and Figure 4 , a plurality of support assemblies 9 can be arranged between the bottom plate 12 and the flipping stage 3. The bottom ends of the support assemblies 9 are vertically fixed to the bottom plate 12, and the top ends abut against the bottom of the flipping stage 3 at the heating position, and the length in the vertical direction can be adjusted. The support assemblies 9 provide support for the flipping stage 3 from below. By adjusting the length, the heating position of the flipping stage 3 can be slightly changed to improve the adaptability to plastic parts.

[0061] Referring to Figure 2 and Figure 4 , the support assembly 9 can include a support sleeve 91 and an adjusting rod 92. The support sleeve 91 is fixed to the bottom plate 12. The adjusting rod 92 is passed through the support sleeve 91 and is in threaded cooperation with the support sleeve 91. By rotating the adjusting rod 92 to change the position of the adjusting rod 92 on the support sleeve 91, the support height of the support assembly 9 can be adjusted.

[0062] Further, referring to Figure 2 and Figure 5 , an installation plate 20 and a connecting plate 19 are arranged between the top plate 11 and the hot plate 1. The installation plate 20 is fixed to the hot plate 1. The connecting plate 19 is located between the installation plate 20 and the top plate 11 and is fixed to both of them through structures such as bolts or columns. There is a certain distance between the connecting plate 19 and the installation plate 20 and the top plate 11 to reduce the heat transfer of the hot plate 1 and prevent other components of the equipment from being damaged due to heat conduction.

[0063] Referring to Figure 5 , a plurality of third telescopic driving members 15 are fixed on one side of the top plate 11 close to the bottom plate 12. The movable ends of the third telescopic driving members 15 sequentially penetrate the connecting plate 19, the installation plate 20 and the hot plate 1, and the movable ends of the third telescopic driving members 15 can extend out from the side of the hot plate 1 close to the plastic part. When the hot plate 1 abuts against the plastic part for heating, the movable ends of the third telescopic driving members 15 extend out from the hot plate 1 and abut against the plastic part, further pressing and fixing the plastic part to the fixed stage 2 and the flipping stage 3.

[0064] It should be noted that the welding surface of the plastic part is a net-shaped or grid-shaped hollow structure. The movable end of the third telescopic driving member 15 passes through the gap of the hollow structure and abuts against the plastic part body.

[0065] Referring to Figure 2 and Figure 5 , a plurality of positioning rods 16 are fixed on the top plate 11, and a plurality of positioning sleeves 17 are correspondingly arranged on the bottom plate 12. The positioning rods 16 and the positioning sleeves 17 are in one-to-one correspondence and are inserted and matched. When the hot plate 1 abuts against the welding surface of the plastic part, each positioning rod 16 is inserted into the corresponding positioning sleeve 17 to ensure that the position of the hot plate 1 corresponds to the plastic part, improving the hot melting effect and accuracy.

[0066] In this embodiment, four positioning rods 16 and four positioning sleeves 17 are provided and are distributed at the four corners of the top plate 11. In other embodiments, they can also be arranged in other quantities and positions.

[0067] Furthermore, referring to Figure 2 and Figure 5 , a plurality of support rods 18 are also fixed on the top plate 11, and a plurality of support assemblies 9 are correspondingly arranged on the bottom plate 12 for the support rods 18. When the hot plate 1 abuts against the welding surface of the plastic part, the bottom end of the support rod 18 abuts against the top end of the support assembly 9, preventing the hot plate 1 from excessively squeezing the plastic part under the drive of the lifting drive member 4 and causing damage to the plastic part, improving the hot melting accuracy. Moreover, the height of the support assembly 9 can be adjusted according to the hot melting situation to change the tightness of the contact between the hot plate 1 and the plastic part, adapting to the hot melting requirements of different plastic parts.

[0068] The implementation principle of Embodiment 1 of the present application is as follows:

[0069] First, loosen the first clamping blocks 21 and the second clamping blocks 31 on the fixed stage 2 and the flipping stage 3, place the two plastic parts on the two receiving portions respectively, and then press the first clamping blocks 21 and the second clamping blocks 31 against the plastic parts;

[0070] Use the lifting drive member 4 to drive the hot plate 1 to abut against the welding surfaces of the two plastic parts. At the same time, the positioning rods 16 are inserted into the positioning sleeves 17, and the support rods 18 abut against the support assemblies 9. The hot plate 1 melts the welding surfaces of the two plastic parts;

[0071] After the hot melting is completed, drive the hot plate 1 to disengage from the two plastic parts;

[0072] Subsequently, use the flipping drive assembly 7 to switch the flipping stage 3 from the heating position to the welding position, make the welding surfaces of the two plastic parts abut, and the pressing head 81 of the pressing assembly 8 presses on the flipping stage 3 to perform pressure holding on the two plastic parts until the welding is completed;

[0073] Subsequently, loosen the bolt on the adjusting part 312, and the flipping drive assembly 7 drives the flipping loading platform 3 to enter the heating position. The two plastic parts welded together are located on the fixed loading platform 2. After loosening the first clamping block 21, the welded workpiece can be removed.

[0074] Embodiment 2:

[0075] This embodiment provides another flipping drive assembly 7.

[0076] Referring to Figure 6 , the flipping drive assembly 7 may include a rotary drive member 74. The output shaft of the rotary drive member 74 is connected to one of the rotating shafts 32 and rotates synchronously. The output shaft of the rotary drive member 74 rotates to drive the flipping loading platform 3 to rotate, realizing the switching between two positions. The rotary drive member 74 can be selected from mechanisms such as a DC motor, a servo motor, and a rotary cylinder that can provide a rotary driving force.

[0077] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A hot plate cross welding device for sun visor PP shell, characterized by: The invention comprises a hot plate (1) for hot-melting the welding surface of a plastic part, and a fixed carrier (2) and a flip carrier (3) for respectively loading two plastic parts. The hot plate (1) is arranged to be lifted and lowered, and the flip carrier (3) is arranged to be rotated. The flip carrier (3) has a heating position and a welding position. When the flip carrier (3) is located at the heating position, the end surfaces of the flip carrier (3) and the fixed carrier (2) for carrying the plastic part are kept parallel, so as to cooperate with the hot plate (1) to perform hot-melt treatment on the plastic part. When the flip carrier (3) is located at the welding position, the welding surface of the plastic part on the flip carrier (3) and the welding surface of the plastic part on the fixed carrier (2) are in contact, so as to perform mold welding on the two plastic parts.

2. The hot plate cross welding equipment for the PP shell of the sun visor according to claim 1 is characterized by: The fixed carrier (2) and the flip carrier (3) are both provided with a bearing portion (5), and the two plastic parts are respectively attached to the two bearing portions (5). The fixed carrier (2) is provided with a plurality of first clamping blocks (21) for clamping the plastic parts on the sides of the plastic parts, and the flip carrier (3) is provided with a plurality of second clamping blocks (31) for clamping the plastic parts on the sides of the plastic parts.

3. The hot plate cross welding equipment for the PP shell of the sun visor according to claim 2 is characterized by: When the turning platform (3) is located at the welding position, the first clamping blocks (21) and the second clamping blocks (31) are staggeredly distributed around the plastic part.

4. The hot plate cross welding equipment for the PP shell of the sun visor according to claim 1 is characterized by: Two rotating shafts (32) are coaxially arranged at both ends of the flip platform (3), one of the rotating shafts (32) being connected to a flip driving assembly (7), the flip driving assembly (7) being used to drive the flip platform (3) to switch between a heating position and a welding position.

5. The hot plate cross welding equipment for the PP shell of the sun visor according to claim 4 is characterized by: The flip drive assembly (7) comprises a first telescopic drive member (71), a gear (72) and a rack (73); the gear (72) is coaxially fixed to one of the rotating shafts (32); the rack (73) is fixed to the movable end of the first telescopic drive member (71) and meshes with the gear (72).

6. The hot plate cross welding equipment for the PP shell of the sun visor according to claim 4 is characterized by: The flip drive assembly (7) comprises a rotary cylinder, the output shaft of which is connected to one of the rotating shafts (32) and rotates synchronously.

7. The hot plate cross welding equipment for sun visor PP shell according to claim 1, characterized in that: It also comprises a clamping assembly (8), wherein the clamping assembly (8) has at least one movable end, and the at least one movable end is used to abut against the flip platform (3) located at the welding position and to press the flip platform (3) against the fixed platform (2).

8. The hot plate cross welding equipment for sun visor PP shell according to claim 7, characterized in that: The pressing assembly (8) comprises a pressing head (81), a mounting shaft (82) and a second telescopic driving member (83); the mounting shaft (82) is rotatably arranged; the pressing head (81) is fixed to the mounting shaft (82) and is used as a movable end to abut against the flip platform (3); and the second telescopic driving member (83) is used to drive the mounting shaft (82) to rotate.

9. The hot plate cross welding equipment for sun visor PP shell according to claim 1, characterized in that: The device also comprises an outer frame (10), a top plate (11) and a bottom plate (12); the outer frame (10) has a cavity for accommodating various components; the top plate (11) is arranged in the cavity for lifting; the hot plate (1) is connected to the top plate (11); the bottom plate (12) is fixed in the cavity; and the fixed carrier (2) and the flip carrier (3) are arranged on the bottom plate (12).

10. The hot plate cross welding equipment for the PP shell of the sun visor according to claim 9, characterized in that: A plurality of support components (9) are arranged between the bottom plate (12) and the flip platform (3); one end of the support component (9) is fixed to the bottom plate (12), and the other end is abutted against a side of the flip platform (3) away from the plastic part; the support component (9) is used to adjust the distance between the flip platform (3) and the bottom plate (12).

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