Plastic film heating forming mechanism and production process

Abstract

The application provides a plastic film heating forming mechanism and a production process, and relates to the technical field of plastic container forming. The mechanism comprises a heating seat, a forming lower mold, a transfer upper mold, a driving piece and a plurality of ring-shaped pieces. The heating seat and the forming lower mold are separately designed, and two groups of transfer upper molds capable of exchanging positions are designed. The transfer upper mold and the heating seat are matched to form a heating structure, which can heat a predetermined size of a sheet-shaped plastic film to a predetermined stability, and then transfer the sheet-shaped plastic film to the forming lower mold. The forming lower mold and the transfer upper mold form a structure for forming the predetermined size of the heated sheet-shaped plastic film into a plurality of plastic containers. After simple slitting, single plastic containers can be obtained. This method can better utilize the waiting time of heating and forming, and improve the production efficiency of the plastic containers.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic container forming, in particular to a plastic film heating forming mechanism and production process. BACKGROUND

[0002] People's life rhythm is fast at present, and the demand for disposable plastic food containers increases sharply. The efficiency of plastic containers produced by traditional injection molding is low, which cannot meet market demand. The process of batch heating forming of plastic film can improve the production efficiency of plastic containers.

[0003] In the process of heating and forming of plastic film, there are mainly two heating methods for the plastic film cut into a predetermined size of sheet. One is to heat directly on the forming mechanism, and then to form by pressure (positive pressure / negative pressure) after heating, and then to cool and take out. This process takes a long time to heat and wait. The other is to heat on the heating mechanism and then transfer to the forming mechanism. This method takes a shorter time to wait, and the heating and forming are basically completed synchronously, but the sheet-shaped plastic film after softening is not easy to transfer. Therefore, the present application provides a plastic film heating forming mechanism and production process. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a plastic film heating forming mechanism and production process, which solves the problem that the sheet-shaped plastic film after softening is not easy to transfer during heating and forming of the plastic film.

[0005] To achieve the above purpose, the present application is realized by the following technical scheme:

[0006] A plastic film heating forming mechanism, comprising:

[0007] A heating seat, the top of the heating seat has a first annular stepped opening;

[0008] A lower forming die, the top of the lower forming die has a second annular stepped opening;

[0009] A transfer upper die, the transfer upper die is provided with two groups, and the two groups of transfer upper dies correspond to the heating seat and the lower forming die respectively, and the side surface of the transfer upper die is provided with a clamping piece, and the bottom of the cavity of the transfer upper die is provided with a gas hole;

[0010] A driving member, the driving member is fixedly installed at the action end of the two groups of transfer upper dies, and the driving member is used for changing the position of the two groups of transfer upper dies;

[0011] An annular member, the annular member matches the first annular stepped opening and the second annular stepped opening.

[0012] Preferably, it further comprises:

[0013] a flattening assembly for flattening the plastic film;

[0014] a shearing assembly arranged on one side of the flattening assembly for shearing the flattened plastic film;

[0015] a power roller arranged between the shearing assembly and the flattening assembly for driving the plastic film;

[0016] The heating seat is located on one side of the shearing assembly.

[0017] Preferably, the flattening assembly comprises:

[0018] a support table, the top of which is fixedly installed with four groups of support columns arranged in a rectangular shape, the side surface of the support column being provided with a first vertical sliding hole;

[0019] an upper pressing plate and a lower pressing plate, both of which are arranged on the inner side of the four groups of support columns, and the bottom of the upper pressing plate corresponds to the top of the lower pressing plate, and the side surface of the upper pressing plate and the lower pressing plate is fixedly connected with a rod corresponding to the first vertical sliding hole;

[0020] a dome frame fixedly installed at the top end of the four groups of support columns, and a suspended top piece slidingly connected to the center of the dome frame along the vertical direction, the bottom end of the suspended top piece being fixedly connected to the top of the upper pressing plate, and a spring piece being arranged between the top end of the suspended top piece and the top of the dome frame;

[0021] two groups of sliding clamps slidingly installed on one group of symmetrical side surfaces of the support table, the two groups of sliding clamps being fixedly connected with an arcuate frame, a horizontal telescopic piece being fixedly installed at the bottom of the support table, the telescopic end of the horizontal telescopic piece being fixedly installed with the arcuate frame, a vertical driving plate being fixedly installed at the top of the sliding clamp, horizontal rods being fixedly installed at the top end and the bottom end of the vertical driving plate, the side surface of the upper pressing plate and the lower pressing plate being fixedly connected with an arch-shaped piece, and the horizontal rods corresponding to the arch-shaped part of the arch-shaped piece.

[0022] Preferably, the shearing assembly comprises:

[0023] a first frame body, the side surface of which is provided with a second vertical sliding hole;

[0024] an upper shearing piece and a lower shearing piece, both of which are slidingly installed on the inner side of the second vertical sliding hole, and the bottom of the upper shearing piece corresponds to the top of the lower shearing piece;

[0025] an elastic block being arranged between the upper shearing piece and the lower shearing piece;

[0026] The end of the upper shear and the lower shear is fixedly connected with a matching rod, the lateral surface of the vertical driving plate is fixedly installed with a transverse driving plate, the end of the transverse driving plate is provided with a contraction opening, when the contraction opening horizontally extrudes the matching rod at the end of the upper shear and the lower shear, the upper shear and the lower shear are made to perform a shearing action.

[0027] The bottom of the lower shear is fixedly connected with an elastic frame.

[0028] Preferably, a guide frame is arranged between the shearing assembly and the heating seat.

[0029] Preferably, the heating seat comprises a base, the top of the base is fixedly installed with a heating plate, the outer side of the heating plate and the top of the base form a first annular stepped opening.

[0030] Preferably, the lower forming die comprises:

[0031] A water tank, the inside of the water tank is provided with circulating cooling water;

[0032] A model shell, the model shell is fixedly installed in the inside of the water tank, the top of the model shell is provided with a plurality of forming cavities, the top of the outer side of the model shell is provided with a second annular stepped opening.

[0033] Preferably, the transfer upper die comprises:

[0034] A cavity, the top of the cavity is provided with an air inlet and an air outlet, the top of the lateral surface of the cavity is fixedly installed with a second frame body;

[0035] The clamping piece comprises a bidirectional telescopic piece, the main body of the bidirectional telescopic piece is fixedly installed with the top of the cavity, the two telescopic ends of the bidirectional telescopic piece are fixedly installed with clamping plates.

[0036] Preferably, the driving piece comprises:

[0037] A frame, the inner side of the bottom of the frame is fixedly installed with a rotating piece, the output end of the rotating piece is fixedly installed with a beam frame, the two ends of the beam frame are fixedly installed with vertical telescopic pieces, two groups of the vertical telescopic pieces correspond to two groups of the transfer upper die, and the vertical telescopic pieces are fixedly connected with the second frame body of the transfer upper die.

[0038] A production process of a plastic film heating forming mechanism, using the plastic film heating forming mechanism, comprising the following steps:

[0039] S1, first, buckle the annular piece at the first annular stepped opening of the heating seat, then place the predetermined size of the sheet-shaped plastic film on the heating seat, the driving piece controls one of the transfer upper dies to press on the heating seat, and the heating seat heats the predetermined size of the sheet-shaped plastic film;

[0040] S2, after the heating is completed, the clamping part of the transfer upper die located above the heating seat clamps the annular part, a sealed space is formed between the bottom of the transfer upper die located above the heating seat and the plastic film sheet of a predetermined size, the gas inside the cavity of the transfer upper die located above the heating seat is extracted, a negative pressure is formed in the cavity of the transfer upper die located above the heating seat, and then a negative pressure is formed in the sealed space;

[0041] S23, the driving part drives the transfer upper die located above the heating seat to carry the heated plastic film sheet of a predetermined size to the forming lower die, then high-pressure gas is filled into the cavity of the transfer upper die at the forming lower die, and the heated plastic film sheet of a predetermined size is formed.

[0042] The application provides a plastic film heating forming mechanism and a production process.

[0043] 1, the application, by separately designing the heating seat and the forming lower die, and designing two groups of transfer upper dies which can exchange positions, the transfer upper die and the heating seat cooperate to form a heating structure, which can heat the plastic film sheet of a predetermined size to a predetermined stable state, and then transfer the plastic film sheet of a predetermined size to the forming lower die, the forming lower die and the transfer upper die constitute a structure which can form the heated plastic film sheet of a predetermined size into a plurality of plastic containers, and a single plastic container can be obtained through simple slitting in the later stage, the method can better utilize the waiting time of heating and forming, improve the production efficiency of the plastic container, and the application also has a first annular step opening on the top of the heating seat, a second annular step opening on the top of the forming lower die, and a clamping part arranged on the side surface of the transfer upper die, which cooperates with the annular part used for auxiliary production, can stably fix the heated and softened plastic film sheet of a predetermined size when the heated and softened plastic film sheet of a predetermined size is transferred, and can further stabilize the heated and softened plastic film sheet of a predetermined size by cooperating with the negative pressure formed in the transfer upper die.

[0044] 2, the application, by designing the flattening assembly, the shearing assembly and the power roller, the plastic film wound on the roller can be flattened first, and then cut into a plastic film sheet of a predetermined size, which can be automatically and efficiently produced, and the production efficiency of the plastic container is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 It is a perspective view of the plastic film heating forming mechanism provided by the application;

[0046] Figure 2 It is a front view of the plastic film heating forming mechanism provided by the application;

[0047] Figure 3 It is a top view of the plastic film heating forming mechanism provided by the application;

[0048] Figure 4 Figure 2 is a side view of a plastic film heating forming mechanism according to the present application;

[0049] Figure 5 Figure 3 is a sectional view taken along the line A-A in Figure 2; Figure 3

[0050] Figure 6 Figure 4 is a perspective view of a partial structure of a plastic film heating forming mechanism according to the present application;

[0051] Figure 7 Figure 5 is a sectional view taken along the line B-B in Figure 4; Figure 6

[0052] Figure 8 Figure 6 is a perspective view of a transfer upper mold of a plastic film heating forming mechanism according to the present application;

[0053] Figure 9 Figure 7 is a perspective view of a flattening and shearing assembly of a plastic film heating forming mechanism according to the present application;

[0054] Figure 10 Figure 8 is a perspective view of a flattening and shearing assembly of a plastic film heating forming mechanism according to the present application;

[0055] Figure 11 Figure 9 is a perspective view of a flattening assembly of a plastic film heating forming mechanism according to the present application;

[0056] Figure 12 Figure 10 is an exploded view of an upper pressing plate of a plastic film heating forming mechanism according to the present application.

[0057] ​​Among them, 1. Plastic film; 2. Flattening assembly; 201. Support platform; 202. Support column; 203. Dome frame; 204. Upper pressure plate; 204a. Plate body; 204b. Shell; 204c. Heating tube; 205. Lower pressure plate; 206. Suspension component; 207. Spring component; 208. Horizontal telescopic component; 209. Sliding clip; 2010. Vertical drive plate; 2011. Crossbar; 2012. Arch component; 2013. Horizontal drive plate; 2014. Bow-shaped frame; 3. Shearing assembly; 301. First frame; 302. Upper shear component; 303. Lower shear component; 30 3a. Elastic frame; 304. Elastic block; 4. Power roller; 5. Heating seat; 501. Base; 502. Heating plate; 6. Lower forming mold; 601. Water tank; 602. Model shell; 603. Forming cavity; 7. Transfer upper mold; 701. Cavity; 701a. Air hole; 702. Clamping component; 702a. Clamping plate; 702b. Bidirectional telescopic component; 703. Second frame; 704. Air inlet; 705. Air outlet; 8. Guide frame; 9. Drive component; 901. Frame; 902. Rotating component; 903. Beam frame; 904. Vertical telescopic component; a. Ring component. Detailed Implementation

[0058] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] Example 1:

[0060] like Figures 1-12 As shown, an embodiment of the present invention provides a plastic film heating and forming mechanism, including: a heating seat 5, a lower forming mold 6, a transfer upper mold 7, a driving component 9, and several annular components a.

[0061] The ring-shaped component a is an auxiliary component independent of the plastic film heating and forming mechanism.

[0062] The top of the heating seat 5 has a first annular stepped opening, the annular piece a can be sleeved at the first annular stepped opening, the top of the forming lower die 6 has a second annular stepped opening, the annular piece a can also be sleeved at the second annular stepped opening, the transfer upper die 7 is provided with two groups, and the two groups of transfer upper dies 7 correspond to the heating seat 5 and the forming lower die 6 respectively, wherein the transfer upper die 7 and the heating seat 5 can constitute a heating structure, the transfer upper die 7 and the forming lower die 6 can constitute a forming structure, the side surface of the transfer upper die 7 is provided with a clamping piece 702, and the bottom of the cavity 701 of the transfer upper die 7 is provided with a gas hole 701a, the driving part 9 is fixedly installed with the two groups of transfer upper dies 7, the driving part 9 is used for changing the positions of the two groups of transfer upper dies 7, and the annular piece a is matched with the first annular stepped opening and the second annular stepped opening.

[0063] When in use, one group of transfer upper dies 7 and the heating seat 5 constitute a heating structure to heat the plastic film, and the other group of transfer upper dies 7 and the forming lower die 6 constitute a forming structure to form the heated plastic film, and when changing the positions of the two groups of transfer upper dies 7, one group of transfer upper dies 7 transfers the formed product out and moves above the heating seat 5 to constitute a heating structure with the heating seat 5, and the other group of transfer upper dies 7 carries the heated plastic film to the forming lower die 6 to constitute a forming structure with the forming lower die 6 to form the heated plastic film, so as to realize efficient production of plastic containers.

[0064] In the process that the transfer upper die 7 carries the heated plastic film to the forming lower die 6, the clamping piece 702 can clamp the annular piece a below the plastic film, the annular piece a and the bottom of the transfer upper die 7 extrude the edge of the heated plastic film, and the cavity 701 of the transfer upper die 7 is extracted into negative pressure, so that the heated plastic film can be stably connected with the transfer upper die 7, thereby solving the problem that the sheet plastic film after being heated and softened is not easy to transfer.

[0065] In an embodiment, the flatting assembly 2, the shearing assembly 3 and the power roller 4 are further included.

[0066] The flatting assembly 2 is used for flattening the plastic film 1, the shearing assembly 3 is arranged on one side of the flatting assembly 2 and is used for shearing the flattened plastic film 1, and the power roller 4 is arranged between the shearing assembly 3 and the flatting assembly 2 and is used for driving the plastic film 1.

[0067] The power roller 4 generally uses a double roller structure, both of which are directly driven to rotate by a motor, so that the plastic film 1 can move forward. Since the plastic film 1 is wound on the roller, it is relatively curved when it is unwound from the roller. When passing through the flattening assembly 2, the flattening assembly 2 flattens the plastic film 1. The flattened plastic film 1 passes through the cutting assembly 3, which can cut the flattened plastic film 1 into a sheet-shaped plastic film of a predetermined size according to a predetermined length. The heating seat 5 is located on one side of the cutting assembly 3, and a guide frame 8 is further arranged between the cutting assembly 3 and the heating seat 5. The cut sheet-shaped plastic film of a predetermined size falls onto the heating seat 5 along the guide frame 8, realizing automatic feeding on the heating seat 5, thereby improving production efficiency and reducing labor costs.

[0068] In an embodiment, the flattening assembly 2 includes a support table 201, an upper pressing plate 204, a lower pressing plate 205, a dome frame 203, a sliding clamping piece 209, etc.

[0069] The top of the support table 201 is fixedly installed with four groups of rectangularly distributed support columns 202, the side surfaces of the support columns 202 are provided with first vertical sliding holes, the upper pressing plate 204 and the lower pressing plate 205 are arranged on the inner sides of the four groups of support columns 202, the bottom of the upper pressing plate 204 corresponds to the top of the lower pressing plate 205, the upper pressing plate 204 and the lower pressing plate 205 can flatten the plastic film passing therebetween, the side surfaces of the upper pressing plate 204 and the lower pressing plate 205 are fixedly connected with rod pieces corresponding to the first vertical sliding holes, the rod pieces slide in the first vertical sliding holes in the upward and downward directions, thereby guiding the movement of the upper pressing plate 204 and the lower pressing plate 205, the dome frame 203 is fixedly installed at the top ends of the four groups of support columns 202, the four groups of support columns 202 are composed of two groups of arch frames, the center of the dome frame 203 is slidingly connected with a suspension top piece 206 in the upward and downward directions, the bottom end of the suspension top piece 206 is fixedly connected with the top of the upper pressing plate 204, a spring piece 207 is arranged between the top end of the suspension top piece 206 and the top of the dome frame 203, under the action of the spring piece 207 and the suspension top piece 206, the upper pressing plate 204 is elastically suspended, two groups of sliding clamping pieces 209 are arranged, the two groups of sliding clamping pieces 209 are slidingly installed on one group of symmetrical side surfaces of the support table 201, the two groups of sliding clamping pieces 209 are fixedly connected with an arcuate frame 2014, a horizontal telescopic piece 208 is fixedly installed at the bottom of the support table 201, the telescopic end of the horizontal telescopic piece 208 is fixedly installed with the arcuate frame 2014, a vertical driving plate 2010 is fixedly installed at the top of the sliding clamping piece 209, horizontal rods 2011 are fixedly installed at the top end and the bottom end of the vertical driving plate 2010, the side surfaces of the upper pressing plate 204 and the lower pressing plate 205 are fixedly connected with arch-shaped pieces 2012, and the horizontal rods 2011 correspond to the arch-shaped portions of the arch-shaped pieces 2012.

[0070] When working, the horizontal telescopic part 208 pushes the arch-shaped frame 2014 to move horizontally, and then pushes the sliding clamping part 209 to slide along the side surface of the support table 201, the sliding clamping part 209 drives the vertical driving plate 2010 to slide horizontally, the cross rod 2011 extrudes the arch-shaped part of the arch-shaped part 2012, and the upper pressing plate 204 and the lower pressing plate 205 are extruded towards the middle part (the upper pressing plate 204 is moved downwards against the elastic force of the elastic suspension, and the lower pressing plate 205 is moved upwards against the gravity), so that the plastic film is flattened.

[0071] The upper pressing plate 204 and the lower pressing plate 205 are symmetrical in structure and position; the upper pressing plate 204 comprises a shell 204b, a heating pipe 204c is arranged in the shell 204b, and a plate body 204a is fixedly installed on the top of the shell 204b; the heating pipe 204c heats the shell 204b, and the shell 204b softens the plastic film when contacting the plastic film, so as to flatten the plastic film.

[0072] In an embodiment, the shearing assembly 3 comprises a first frame body 301, an upper shearing part 302 and a lower shearing part 303; a second vertical sliding hole is formed in the side surface of the first frame body 301; the upper shearing part 302 and the lower shearing part 303 are both slidingly installed on the inner side of the second vertical sliding hole, and the bottom of the upper shearing part 302 corresponds to the top of the lower shearing part 303.

[0073] An elastic block 304 is arranged between the upper shearing part 302 and the lower shearing part 303, the elastic block 304 separates the upper shearing part 302 and the lower shearing part 303, the end portions of the upper shearing part 302 and the lower shearing part 303 are fixedly connected with matching rods, a horizontal driving plate 2013 is fixedly installed on the side surface of the vertical driving plate 2010, and the end portion of the horizontal driving plate 2013 has a contraction opening; when the contraction opening horizontally extrudes the matching rods at the end portions of the upper shearing part 302 and the lower shearing part 303, the upper shearing part 302 and the lower shearing part 303 perform shearing action.

[0074] Specifically, the contraction opening is "V"-shaped; when the contraction opening extrudes the matching rods on the upper shearing part 302 and the lower shearing part 303, the upper shearing part 302 and the lower shearing part 303 overcome the elastic force of the elastic block 304, and the upper shearing part 302 and the lower shearing part 303 are closed to shear the plastic film.

[0075] The bottom of the lower shearing part 303 is fixedly connected with an elastic frame 303a, the elastic frame 303a is elastically supported on the bottom of the second vertical sliding hole, so as to avoid the lower shearing part 303 from impacting the bottom of the second vertical sliding hole when falling.

[0076] In an embodiment, the heating seat 5 comprises a base 501, a heating plate 502 is fixedly installed on the top of the base 501, a first annular stepped opening is formed on the outer side of the heating plate 502 and on the top of the base 501, the top surface of the base 501 is larger than the bottom surface of the heating plate 502, and the heating plate 502 is an electric heating plate.

[0077] In an embodiment, the forming lower mold 6 comprises a water tank 601 and a mold shell 602.

[0078] The inside of the water tank 601 is provided with circulating cooling water, that is, the inside of the water tank 601 contains water, and pipelines for water inlet and water outlet are arranged, so that the water in the inside of the water tank 601 can be replaced in time, the mold shell 602 is fixedly installed in the inside of the water tank 601, a plurality of forming cavities 603 are formed on the top of the mold shell 602, and a second annular stepped opening is formed on the outer side of the top of the mold shell 602.

[0079] Since the mold shell 602 is fixedly installed in the inside of the water tank 601, the temperature of the mold shell 602 is relatively low, and the plastic container can be quickly cooled after being formed.

[0080] In an embodiment, the transfer upper mold 7 comprises a cavity 701, an air inlet interface 704 and an air outlet interface 705 are arranged on the top of the cavity 701, pump bodies and pipelines are correspondingly installed on the air inlet interface 704 and the air outlet interface 705, when the pump bodies work, high-pressure gas can be filled into the cavity 701 from the air inlet interface 704, and when another pump body works, gas can be pumped from the air outlet interface 705, so that negative pressure is formed in the inside of the cavity 701, and a second frame body 703 is fixedly installed on the top side of the cavity 701.

[0081] The clamping piece 702 comprises a bidirectional telescopic piece 702b, the main body of the bidirectional telescopic piece 702b is fixedly installed on the top of the cavity 701, and clamping plates 702a are fixedly installed on both ends of the bidirectional telescopic piece 702b.

[0082] The bidirectional telescopic piece 702b drives the two clamping plates 702a to move inward, and the two clamping plates 702a can clamp the annular piece a.

[0083] In an embodiment, the driving piece 9 comprises a frame 901, a rotating piece 902 is fixedly installed on the inner side and bottom of the frame 901, a beam frame 903 is fixedly installed on the output end of the rotating piece 902, vertical telescopic pieces 904 are fixedly installed on both ends of the beam frame 903, two groups of vertical telescopic pieces 904 correspond to two groups of transfer upper molds 7, and the vertical telescopic pieces 904 are fixedly connected with the second frame bodies 703 of the transfer upper molds 7.

[0084] Two vertical telescopic members 904 can independently move up and down, and the rotating member 902 can drive the beam frame 903 to rotate, and through the cooperation of the two vertical telescopic members 904 and the rotating member 902, the position exchange of the two groups of transfer upper dies 7 can be realized.

[0085] Embodiment two:

[0086] A production process of a plastic film heating forming mechanism, using the plastic film heating forming mechanism in embodiment one, comprising the following steps:

[0087] S1, first buckle the annular member at the first annular step opening of the heating seat, then place the predetermined size of the sheet-shaped plastic film on the heating seat, drive the member to operate one of the transfer upper dies to press on the heating seat, the heating seat heats the predetermined size of the sheet-shaped plastic film, and the other transfer upper die is in cooperation with the forming lower die, the forming of the plastic film is completed, and the heating and forming can be synchronized.

[0088] S2, after heating is completed, the clamping member of the transfer upper die located above the heating seat clamps the annular member, so that a sealed space is formed between the bottom of the transfer upper die located above the heating seat and the predetermined size of the sheet-shaped plastic film, the gas inside the cavity of the transfer upper die located above the heating seat is extracted, the cavity of the transfer upper die located above the heating seat is formed into negative pressure, and then the sealed space is formed into negative pressure.

[0089] S23, the drive member operates the transfer upper die located above the heating seat to carry the heated predetermined size of the sheet-shaped plastic film to the forming lower die, and then fills the cavity of the transfer upper die at the forming lower die with high-pressure gas, so that the heated predetermined size of the sheet-shaped plastic film is formed.

[0090] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A plastic film heat forming mechanism characterized by, The utility model relates to a plastic film production line, including: A heating seat (5) has a first annular step mouth on the top; A forming lower mould (6) has a second annular step mouth on the top; A transfer upper mould (7) is provided with two groups, and the two groups of transfer upper moulds (7) correspond to the heating seat (5) and the forming lower mould (6) respectively, and the side of the transfer upper mould (7) is provided with a clamping piece (702), and the bottom of the cavity (701) of the transfer upper mould (7) is provided with a gas hole (701a); A driving part (9) is fixedly installed at the action end of the two groups of transfer upper moulds (7), and the driving part (9) is used to exchange the positions of the two groups of transfer upper moulds (7); An annular part (a) matches the first annular step mouth and the second annular step mouth; A flattening assembly (2) is used for flattening the plastic film (1); A shearing assembly (3) is arranged on one side of the flattening assembly (2) and is used for shearing the flattened plastic film (1); A power roller (4) is arranged between the shearing assembly (3) and the flattening assembly (2), and the power roller (4) is used to drive the plastic film (1); The heating seat (5) is located on one side of the shearing assembly (3); The flattening assembly (2) includes: A support table (201) is fixedly installed with four groups of rectangularly distributed support columns (202) on the top, and a first vertical sliding hole is formed in the side of the support column (202); An upper pressing plate (204) and a lower pressing plate (205) are arranged on the inner side of the four groups of support columns (202), the bottom of the upper pressing plate (204) corresponds to the top of the lower pressing plate (205), and the side of the upper pressing plate (204) and the lower pressing plate (205) is fixedly connected with the rod corresponding to the first vertical sliding hole; A dome frame (203) is fixedly installed at the top of the four groups of support columns (202), and a suspension top piece (206) is slidingly connected to the center of the dome frame (203) in the up-down direction, the bottom of the suspension top piece (206) is fixedly connected to the top of the upper pressing plate (204), and a spring (207) is arranged between the top of the suspension top piece (206) and the top of the dome frame (203). The sliding clamping piece (209) is provided with two groups, and the two groups of sliding clamping pieces (209) are slidingly installed on a pair of symmetrical sides of the support table (201); the two groups of sliding clamping pieces (209) are fixedly connected with the arc-shaped frame (2014); the bottom of the support table (201) is fixedly installed with the horizontal telescopic piece (208); the telescopic end of the horizontal telescopic piece (208) is fixedly installed with the arc-shaped frame (2014); the top of the sliding clamping piece (209) is fixedly installed with the vertical driving plate (2010); the top end and the bottom end of the vertical driving plate (2010) are fixedly installed with the horizontal rod (2011); the side surfaces of the upper pressing plate (204) and the lower pressing plate (205) are fixedly connected with the arch-shaped piece (2012), and the horizontal rod (2011) corresponds to the arch-shaped part of the arch-shaped piece (2012).

2. The plastic film heat forming mechanism according to claim 1, wherein The shearing assembly (3) comprises: A first frame body (301) is provided with a second vertical sliding hole on the side surface; An upper shearing piece (302) and a lower shearing piece (303) are slidingly installed on the inner side of the second vertical sliding hole, and the bottom of the upper shearing piece (302) corresponds to the top of the lower shearing piece (303); An elastic block (304) is arranged between the upper shearing piece (302) and the lower shearing piece (303); The end portions of the upper shearing piece (302) and the lower shearing piece (303) are fixedly connected with the matching rods, the side surface of the vertical driving plate (2010) is fixedly installed with a horizontal driving plate (2013), and the end portion of the horizontal driving plate (2013) has a contraction opening; when the contraction opening horizontally extrudes the matching rods at the end portions of the upper shearing piece (302) and the lower shearing piece (303), the upper shearing piece (302) and the lower shearing piece (303) perform a shearing action; The bottom of the lower shearing piece (303) is fixedly connected with an elastic frame (303a).

3. The plastic film heat forming mechanism according to claim 1, wherein: A guide frame (8) is arranged between the shearing assembly (3) and the heating seat (5).

4. The plastic film heat forming mechanism according to claim 1, wherein The heating seat (5) comprises a base (501), and the top of the base (501) is fixedly installed with a heating plate (502); the outer side of the heating plate (502) and the top of the base (501) form a first annular stepped opening.

5. The plastic film heat forming mechanism according to claim 1, wherein The forming lower mold (6) comprises: A water tank (601) is provided with circulating cooling water in the inside; A model shell (602) is fixedly installed in the inside of the water tank (601), a plurality of forming cavities (603) are formed in the top of the model shell (602), and a second annular stepped opening is formed in the top outer side of the model shell (602).

6. The plastic film heat forming mechanism according to claim 1, wherein The transfer upper mold (7) comprises: A cavity (701) is provided with an air inlet (704) and an air outlet (705) on the top, and a second frame body (703) is fixedly installed on the top side of the cavity (701); The clamping piece (702) comprises a bidirectional telescopic piece (702b), the main body of the bidirectional telescopic piece (702b) is fixedly installed at the top of the cavity (701), and both ends of the bidirectional telescopic piece (702b) are fixedly installed with clamping plates (702a).

7. A plastic film heat forming mechanism according to claim 6, wherein The driving piece (9) comprises: A frame (901), the inner side bottom of the frame (901) is fixedly installed with a rotating piece (902), the output end of the rotating piece (902) is fixedly installed with a beam frame (903), both ends of the beam frame (903) are fixedly installed with vertical telescopic pieces (904), two groups of the vertical telescopic pieces (904) correspond to two groups of the transfer upper dies (7), and the vertical telescopic pieces (904) are fixedly connected with the second frame bodies (703) of the transfer upper dies (7).

8. A production process of a plastic film heat forming mechanism, characterized by, The plastic film heating forming mechanism of any one of claims 1-7 comprises the following steps: S1, first buckle the annular piece at the first annular step opening of the heating seat, then place the predetermined size of the sheet-shaped plastic film on the heating seat, drive the one of the transfer upper dies to press on the heating seat, and the heating seat heats the predetermined size of the sheet-shaped plastic film; S2, after heating is completed, the clamping piece of the transfer upper die above the heating seat clamps the annular piece, so that the bottom of the transfer upper die above the heating seat and the predetermined size of the sheet-shaped plastic film form a sealed space, the gas inside the cavity of the transfer upper die above the heating seat is extracted, the cavity of the transfer upper die above the heating seat forms a negative pressure, and then the sealed space forms a negative pressure; S23, the driving piece controls the transfer upper die above the heating seat to carry the heated predetermined size of the sheet-shaped plastic film to the forming lower die, then the cavity of the transfer upper die at the forming lower die is filled with high-pressure gas, and the heated predetermined size of the sheet-shaped plastic film is formed.

Images