CN116834300A - Double-plastic-part hot melting process and hot melting equipment - Google Patents
Double-plastic-part hot melting process and hot melting equipment Download PDFInfo
- Publication number
- CN116834300A CN116834300A CN202310843297.7A CN202310843297A CN116834300A CN 116834300 A CN116834300 A CN 116834300A CN 202310843297 A CN202310843297 A CN 202310843297A CN 116834300 A CN116834300 A CN 116834300A
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- hot melting
- heating
- lower die
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- 238000002844 melting Methods 0.000 title claims abstract description 55
- 230000008018 melting Effects 0.000 title claims abstract description 50
- 238000010309 melting process Methods 0.000 title claims abstract description 24
- 239000004033 plastic Substances 0.000 claims abstract description 131
- 238000010438 heat treatment Methods 0.000 claims abstract description 120
- 239000012943 hotmelt Substances 0.000 claims abstract description 27
- 230000009977 dual effect Effects 0.000 claims description 11
- 230000004927 fusion Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000000155 melt Substances 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
- B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
- B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
- B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
- B29C66/24243—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral
- B29C66/24244—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral forming a rectangle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
Abstract
The invention belongs to the technical field of plastic hot melting, and particularly discloses a double plastic part hot melting process and hot melting equipment, wherein the double plastic part hot melting process comprises the following steps: s1, respectively placing two plastic parts in an upper die and a lower die in a one-to-one correspondence manner; s2, the heating module is moved between the upper die and the lower die; s3, the upper die moves downwards, and the lower die moves upwards until the heating module contacts the two plastic parts; s4, the heating module heats and melts the hot melting ribs on the covering surfaces of the two plastic parts; s5, the upper die moves upwards, the lower die moves downwards, and the heating die resets; s6, the upper die and the lower die are matched, and the two plastic parts are fused together; s7, resetting the upper die and the lower die, and taking out the hot-melt piece. According to the double-plastic-part hot melting process, the hot melting ribs of the two plastic parts are melted, the two plastic parts are quickly melted and connected, the whole hot melting process is good in air tightness, few in parts, quick in manufacturing period, low in cost and stable in service performance.
Description
Technical Field
The invention belongs to the technical field of plastic hot melting, and particularly relates to a double-plastic-part hot melting process and hot melting equipment.
Background
The future development direction of the global automobile is new energy or electric. The new energy automobile industry is growing, and new steps are continuously carried out. Through the development of the years, the irreversible situation of new energy is basically formed. The performance of the automobile parts is particularly important, especially the performance of two plastic parts (such as a plastic bottom shell and a plastic cover body) which need to be covered is important.
The existing plastic cover body and plastic bottom shell are generally connected in an assembled mode, namely: the plastic cover body and the plastic shell are sealed by the sealing ring, and are fastened and connected by a plurality of screws and nuts, so that the assembled plastic assembly has the following defects:
(1) The air tightness of the assembled plastic assembly piece is poor (50 kpa at maximum);
(2) Five different types of parts, namely a plastic cover body, a plastic shell, a sealing ring, a screw and a nut, are required to be used for assembling the plastic assembly, and the large number of parts are assembled to directly lead to long manufacturing period and high cost of the plastic assembly;
(3) The screw assembly process is affected by the use condition, and the screw corrosion risk and the sealing ring failure risk exist, so that the service performance is unstable.
Accordingly, the inventors have devised a process and apparatus to solve the above-mentioned problems.
Disclosure of Invention
The invention aims at: the double plastic part hot melting process can be used for rapidly connecting two plastic parts, and is short in manufacturing period, and a product with good air tightness, low cost and stable service performance is formed.
Another object of the invention is: the double-plastic-part hot melting equipment can reduce the manufacturing period and cost and improve the air tightness and the service performance stability of the product.
In order to achieve the above purpose, the invention adopts a technical scheme that:
a double plastic part hot melting process comprises the following steps:
s1, respectively placing two plastic parts in an upper die and a lower die in a one-to-one correspondence manner;
s2, the heating module is moved between the upper die and the lower die;
s3, the upper die moves downwards, and the lower die moves upwards until the heating module contacts the two plastic parts;
s4, heating and melting the hot melting ribs on the covering surfaces of the two plastic parts respectively by the two heating surfaces of the heating module;
s5, the upper die moves upwards, the lower die moves downwards, and the heating module resets;
s6, controlling the upper die to move downwards again, and controlling the lower die to move upwards until the upper die and the lower die jointly press the two plastic parts, and thermally fusing the thermal fusion ribs of the two plastic parts together to form a thermal fusion part;
s7, resetting the upper die and the lower die, and taking out the hot-melt piece.
As an improvement of the double-plastic-part hot melting process, in the step S4, the heating temperature of the two sides of the heating module is 180-210 ℃, and the heating time of the heating module is 9-11S.
As an improvement of the double plastic part hot melting process, in the step S6, the pressing time of the upper die and the lower die is 9S-11S.
As an improvement of the double-plastic-part hot melting process, the hot melting rib of each plastic part is arranged in a protruding mode, two circles of grooves are formed in the covering surface of each plastic part, and two circles of grooves in the same plastic part are separated by the corresponding hot melting rib.
In order to achieve the other purpose, the invention adopts a technical scheme that:
the utility model provides a two plastic part hot melting equipment, includes the frame, vertical sliding connection has lower mould and last mould in the frame, it is located to go up the mould directly over the lower mould, be equipped with a die cavity on the die-sinking plane of going up the mould, be equipped with the die cavity down on the die-sinking plane of lower mould, vertical sliding connection has the module that generates heat in the frame, the module that generates heat is located go up the mould with between the lower mould, the upper and lower both ends face of the module that generates heat is the heating surface.
As an improvement of the double-plastic-part hot melting equipment, a plurality of guide rods are vertically arranged on the frame, an upper sliding plate and a lower sliding plate are sequentially sleeved on the guide rods from top to bottom in a sliding mode, the upper die is fixed at the bottom of the upper sliding plate, and the lower die is fixed at the top of the lower sliding plate.
As an improvement of the double-plastic-part hot melting equipment, a support frame is arranged on the frame, two sliding rails are arranged on the support frame at intervals in the longitudinal direction of the support frame, middle sliding plates are connected to the two sliding rails in a sliding manner, the heating module comprises two heating parts, and the middle sliding plates are clamped between the two heating parts.
As an improvement of the double-plastic-part hot melting equipment, the heating part comprises a heating plate and a heating plate, wherein the heating plate is positioned between the heating plate and the middle sliding plate, and a heating pipe is arranged in the heating plate.
As an improvement of the double-plastic-part hot melting equipment, the lower die comprises a lower die plate and a bottom die, wherein the lower die plate is arranged on the bottom die at intervals and fixedly connected with the bottom die, a positioning groove is formed in the bottom die, a through hole is formed in the lower die plate and forms a frame shape, and the through hole and the positioning groove respectively form the upper end and the lower end of the lower die cavity.
As an improvement of the double-plastic-part hot melting equipment, air holes are formed in the positioning groove and the upper die cavity.
Compared with the prior art, the double-plastic-part hot melting process provided by the invention has the advantages that two plastic parts to be fused are heated by the heating module with a melting point higher than that of the plastic part material, the hot melting ribs of the two plastic parts are melted by heating the hot melting ribs of the to-be-melted joint object, after the joint surfaces of the two plastic parts are melted, the heating module is removed, the two plastic parts are pressurized, the hot melting ribs of the two plastic parts are fused together, the two plastic parts are quickly melted and connected, the air tightness of the whole hot melting process is good (the air tightness of the hot melting process is 120kpa at maximum), the number of parts is small (only two plastic parts) and the double-plastic-part hot melting process is rapid in manufacturing period, low in cost and stable in use performance.
Compared with the prior art, the double-plastic-part hot melting equipment disclosed by the invention has the advantages that the heating module is utilized to heat the hot melting ribs of the plastic parts on the upper die and the lower die at the same time, then the heating module is removed, the upper die and the lower die are utilized to be clamped, so that the hot melting ribs of the two plastic parts are fused together, the two plastic parts are connected together, the manufacturing period and the cost are reduced, and the air tightness and the service performance stability of a product are improved.
Description of the drawings:
FIG. 1 is a front view of a dual plastic part hot melt apparatus of the present invention;
FIG. 2 is an enlarged view of the internal three-dimensional structure of the double plastic part hot melting device of the present invention;
FIG. 3 is an enlarged left-hand view of the inside of the dual plastic part hot melt apparatus of the present invention;
FIG. 4 is an enlarged perspective view of the heat generating module of the present invention;
FIG. 5 is an enlarged exploded perspective view of the lower mold and the plastic bottom shell of the present invention;
FIG. 6 is an enlarged exploded perspective view of the upper mold and the plastic cover of the present invention;
FIG. 7 is a cross-sectional view of a dual plastic part hot melt apparatus of the present invention;
fig. 8 is an enlarged view at a in fig. 7;
fig. 9 is an enlarged view at B in fig. 7;
FIG. 10 is an enlarged perspective partial sectional view of the plastic bottom shell and the plastic cover of the present invention;
fig. 11 is an enlarged view at C in fig. 10;
fig. 12 is an enlarged view of D in fig. 10.
Illustration of:
1. a frame; 11. a support frame; 111. a slide rail; 12. a guide rod; 2. a lower slide plate; 21. a lower cylinder; 3. a lower die; 31. a lower template; 311. a through hole; 32. a bottom die; 321. a positioning groove; 322. a lower air hole; 4. an upper slide plate; 41. an upper cylinder; 5. an upper die; 51. an upper die cavity; 511. an upper air hole; 6. a middle slide plate; 61. a heating plate is arranged on the upper part; 611. an upper heating plate; 62. a heating plate is arranged down; 621. a lower heating plate; 63. a slide block; 64. a middle cylinder; 65. a heating module; 651. an upper heating element; 652. a lower heating element; 7. a plastic bottom shell; 71. a vent fitting; 72. lower hot-melt ribs; 721. a lower groove; 8. a plastic cover; 81. an upper joint; 82. a receiving hole; 83. a hot melt rib is arranged on the upper part; 831. and an upper groove.
Detailed Description
Embodiments of the present invention will now be described in detail with reference to the drawings, which are intended to be used as references and illustrations only, and are not intended to limit the scope of the invention.
Referring to fig. 1 to 9, a dual plastic part hot melting apparatus includes a frame 1, an upper mold 5, a lower mold 3 and a heating module 65, wherein the upper mold 5 and the lower mold 3 are vertically slidably disposed on the frame 1, the upper mold 5 is located right above the lower mold 3, an upper mold cavity 51 is disposed on a mold combining surface of the upper mold 5, a lower mold cavity is disposed on a mold combining surface of the lower mold 3, the heating module 65 is longitudinally slidably disposed on the frame 1, the heating module 65 is located between the upper mold 5 and the lower mold 3, and upper and lower end surfaces of the heating module 65 are heating surfaces.
Referring to fig. 1, 2 and 7, four guide rods 12 are vertically disposed on the working panel of the frame 1, two guide rods 12 are disposed on the left side of the working panel at intervals, the other two guide rods 12 are disposed on the right side of the working panel at intervals, an upper sliding plate 4 and a lower sliding plate 2 are sequentially sleeved on the four guide rods 12 in a sliding manner from top to bottom, a supporting frame 11 is further disposed on the working panel of the frame 1, two sliding rails 111 are disposed on the supporting frame 11 along the longitudinal interval thereof, and the four guide rods 12 are located outside the supporting frame 11.
Referring to fig. 2, 3, 5 and 7, a lower cylinder 21 is fixed at the bottom of the working panel of the frame 1, the output end of the lower cylinder 21 is connected with a lower slide plate 2, the lower die 3 is fixed at the top of the lower slide plate 2, the lower cylinder 21 pushes the lower slide plate 2 to slide up and down along the axial directions of four guide rods 12, so as to push the lower die 3 to move vertically, the lower die 3 comprises a lower die plate 31 and a bottom die 32, the bottom die 32 is fixed on the lower slide plate 2, a positioning groove 321 is arranged at the top of the bottom die 32, a plurality of lower air holes 322 are arranged at the bottom of the positioning groove 321, the lower die plate 31 is spaced and fixedly arranged right above the bottom die 32, the left end and the right end of the bottom die 32 are fixedly connected with the lower die plate 31 through side plates respectively, the lower die plate 31 is supported, a through hole 311 is arranged on the lower die plate 31, and forms a frame shape, and the through hole 311 and the positioning groove 321 respectively form the upper end and the lower end of the lower die cavity, namely: the space between the lower die plate 31 and the bottom die 32, the through holes 311 and the positioning grooves 321 are combined together to form a lower die cavity.
Referring to fig. 2, fig. 3, fig. 4 and fig. 7, two sliding rails 111 are respectively and slidably connected with a sliding block 63, a middle sliding plate 6 is fixedly connected to the two sliding blocks 63, a heating module 65 is fixed to the middle sliding plate 6, a middle air cylinder 64 is fixed to the back of a supporting frame 11, the output end of the middle air cylinder 64 is connected with the middle sliding plate 6, the middle air cylinder 64 drives the middle sliding plate 6 to longitudinally slide along the two sliding rails 111 so as to drive the heating module 65 to longitudinally move, the heating module 65 comprises two heating elements, namely an upper heating element 651 and a lower heating element 652, the middle sliding plate 6 is clamped between the upper heating element 651 and the lower heating element 652, the upper heating element 651 and the lower heating element 652 are symmetrically arranged, the upper heating element 651 comprises an upper heating plate 61 and an upper heating plate 611, the upper heating plate 61 is overlapped on the top of the upper heating plate 611, the lower heating plate 611 is positioned between the upper heating plate 61 and the middle sliding plate 6, the lower heating plate 652 comprises a lower heating plate 621 and a lower heating plate 62 is overlapped on the bottom of the lower heating plate 621, the lower heating plate 62 is arranged on the bottom of the lower heating plate 621, the lower heating plate 621 is positioned between the lower heating plate 621 and the lower heating plate 62 is arranged between the upper heating plate 621 and the upper heating plate 611 and the lower heating plate 611, and the upper heating plate 611 is arranged in the upper heating plate and the upper heating plate 611 is arranged on the upper heating plate 611 and the upper heating plate 611.
Referring to fig. 1, 2, 3 and 6, the upper mold 5 is fixed at intervals at the bottom of the upper slide plate 4, the upper mold cavity 51 is located at the bottom of the upper mold 5, a plurality of upper air holes 511 are formed at the bottom of the upper mold cavity 51, an upper air cylinder 41 is further fixed on the frame 1, the upper air cylinder 41 is located right above the upper slide plate 4, an output end of the upper air cylinder 41 is connected with the upper slide plate 4, and the upper air cylinder 41 drives the upper slide plate 4 to slide vertically along the axial directions of the four guide rods 12, so as to drive the upper mold 5 to move vertically.
Referring to fig. 5, 6, 10, 11 and 12, the two plastic parts hot-melting equipment of the present invention are specifically a plastic cover 8 and a plastic bottom shell 7, wherein the shape of the plastic bottom shell 7 matches with the shape of the lower cavity of the lower mold 3, specifically, the top of the plastic bottom shell 7 is hollowed out to form a shell shape and the top edge of the plastic bottom shell extends outwards to form a circle of extension, the top of the plastic bottom shell 7 is a covering surface thereof, a circle of lower hot-melting ribs 72 are convexly arranged on the covering surface of the plastic bottom shell 7, two circles of lower grooves 721 are further arranged on the covering surface of the plastic bottom shell 7, the two circles of lower grooves 721 are separated by the lower hot-melting ribs 72, a ventilation joint 71 is arranged on the side wall of the plastic bottom shell 7, an external vacuum pump can suck air through a plurality of lower air holes 322 in a negative pressure manner, the plastic bottom shell 7 is adsorbed in a lower die cavity of the lower die 3, the shape of the plastic cover body 8 is matched with the upper die cavity 51 of the upper die 5, specifically, the bottom hollow of the plastic cover body 8 forms a shell shape, the bottom edge of the plastic cover body extends outwards to form a circle of extension, the bottom of the plastic cover body 8 is a cover surface of the plastic cover body, a circle of hot melt ribs 83 are convexly arranged on the cover surface of the plastic cover body 8, two circles of grooves 831 are further arranged on the cover surface of the plastic cover body 8, the two circles of grooves 831 are separated by the upper hot melt ribs 83, two connecting holes 82 are arranged at the top of the plastic cover body 8, an upper joint 81 is arranged on the side wall of the plastic cover body 8, and an external vacuum pump can suck the plastic cover body 8 into the upper die cavity 51 of the upper die 5 through a plurality of upper air holes 511 in a negative pressure.
Referring to fig. 1 to 12, the working principle of the dual plastic part hot melting device of the present invention is:
placing the plastic bottom shell 7 in a lower die cavity of the lower die 3 and vacuum adsorbing, wherein the extension of the plastic bottom shell 7 is hung on the lower die plate 31, and the lower hot-melt rib 72 faces upwards;
placing the plastic cover body 8 in the upper die cavity 51 of the upper die 5 and vacuum adsorbing, wherein the extension of the plastic cover body 8 is hung on the upper die 5, and the upper hot-melt rib 83 faces downwards;
the middle cylinder 64 drives the middle slide plate 6 to slide forwards, so that the whole heating module 65 is pushed between the upper die 5 and the lower die 3;
the upper cylinder 41 drives the upper slide plate 4 and the upper die 5 to move downwards together, and the lower cylinder 21 drives the lower slide plate 2 and the lower die 3 to move upwards together until the lower hot-melt rib 72 of the plastic bottom shell 7 contacts the upper heating plate 61 and the upper hot-melt rib 83 of the plastic cover body 8 contacts the lower heating plate 62;
the heating pipes heat the upper heating plate 611 and the lower heating plate 621, the upper heating plate 611 conducts heat to the upper heating plate 61, the upper heat-melting rib 83 of the plastic cover 8 is heated, the lower heating plate 621 conducts heat to the lower heating plate 62, and the lower heat-melting rib 72 of the plastic bottom shell 7 is heated;
the upper cylinder 41 drives the upper die 5 to move upwards, and the lower cylinder 21 drives the lower die 3 to move downwards;
the middle cylinder 64 drives the heating module 65 to retreat;
the upper cylinder 41 drives the upper die 5 to move downwards, the lower cylinder 21 drives the lower die 3 to move upwards, the upper die 5 and the lower die 3 are clamped, and the upper hot-melt rib 83 of the plastic cover body 8 and the lower hot-melt rib 72 of the plastic bottom shell 7 are hot-melt welded together under the pressure of the upper die and the lower die to form a hot-melt piece;
the upper die 5 and the lower die 3 are reset, and the hot melt piece can be taken out.
According to the double-plastic-part hot melting equipment, the heating module 65 is utilized to heat the hot melting ribs of the plastic parts on the upper die 5 and the lower die 3 at the same time, the heating module 65 is removed, the upper die 5 and the lower die 3 are utilized to be matched, so that the two plastic parts are connected together through hot melting of the hot melting ribs of the two plastic parts, the manufacturing period and the manufacturing cost are reduced, and the air tightness and the service performance stability of a product are improved.
Referring to fig. 1 to 12, a double plastic part hot melting process is based on the double plastic part hot melting equipment, and comprises the following steps:
s1, placing two plastic parts of a plastic cover body 8 and a plastic bottom shell 7 in an upper die 5 and a lower die 3 in a one-to-one correspondence manner, and carrying out vacuum adsorption;
s2, a middle cylinder 64 drives a heating module 65 to move between the upper die 5 and the lower die 3;
s3, the upper cylinder 41 drives the upper die 5 to move downwards, and the lower cylinder 21 drives the lower die 3 to move upwards until the heating module 65 contacts the two plastic parts;
s4, heating and melting the hot melting ribs on the covering surfaces of the two plastic parts respectively by the two heating surfaces of the heating module 65;
s5, the upper cylinder 41 drives the upper die 5 to move upwards, the lower cylinder 21 drives the lower die 3 to move downwards, and the middle cylinder 64 drives the heating module 65 to reset;
s6, the upper cylinder 41 controls the upper die 5 to move downwards again, the lower cylinder 21 controls the lower die 3 to move upwards again until the upper die 5 and the lower die 3 jointly press the two plastic parts 9S-11S, the covering surfaces of the two plastic parts are fused together to form a hot-melt part, and the pressing time of the upper die 5 and the lower die 3 is 9S-11S;
s7, resetting the upper die 5 and the lower die 3, and taking out the hot melt piece.
In the step S4, the heating temperature of the two sides of the heating module 65 is 180-210 ℃, and the heating time of the heating module 65 is 9-11S.
According to the double-plastic-part hot melting process, two plastic parts to be fused are heated by the heating module 65 with a melting point higher than that of a plastic part material, the hot melting ribs of the two plastic parts are melted by heating the hot melting ribs of the to-be-melted joint, after the joint surfaces of the two plastic parts are melted, the heating module 65 is removed, the two plastic parts are pressurized, the hot melting ribs of the two plastic parts are hot melted together, the two plastic parts are quickly hot melted and connected, the air tightness of the whole hot melting process is good (the air tightness of the hot melting process is 120kpa at maximum), parts are few (only two plastic parts are used), the manufacturing period is short, the cost is low, and meanwhile, the service performance is stable.
The airtight test conditions of the hot melt piece of the invention are as follows: the control box sets a pressure value of 80kpa and an air filling time of 30s, and the air tightness test water tank is required to be free from air leakage bubbles, and the air tightness test method is as follows:
s1, two soft rubber plugs are used for respectively plugging two connecting holes 82 of the plastic cover body 8, then a third soft rubber plug is used for plugging an upper joint 81 of the plastic cover body 8, and an air pipe is used for connecting the ventilation joint 71;
s2, putting the whole hot-melt piece into water, and pressing the hot-melt piece into a water tank filled with water by using a pressure plate;
s4: venting the hot melt through an air tube using an airtight leak tester (gas entering from vent fitting 71, pressure set 80 kap);
and S5, after ventilation for 30 seconds, checking whether bubbles exist at the hot melting position and other positions of the hot melting piece.
In the welding process, a multi-mode welding process is selected according to different requirements of process characteristics, production efficiency and automation degree of various plastic parts, and in the one-time welding process, the welding of several plastic parts can be finished simultaneously, a multi-station hot plate welding machine with higher automation degree can be selected for multi-station welding, and a special multi-head hot plate welding machine with multiple welding surfaces can be adopted for multi-station welding, so that the whole process requirements of one-time welding are met. The welding can meet the requirements of watertight and airtight, and is suitable for welding thermoplastic plastic parts with various shapes, sizes and materials.
The above disclosure is illustrative of the preferred embodiments of the present invention and should not be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (10)
1. The double plastic part hot melting process is characterized by comprising the following steps of:
s1, respectively placing two plastic parts in an upper die and a lower die in a one-to-one correspondence manner;
s2, the heating module is moved between the upper die and the lower die;
s3, the upper die moves downwards, and the lower die moves upwards until the heating module contacts the two plastic parts;
s4, heating and melting the hot melting ribs on the covering surfaces of the two plastic parts respectively by the two heating surfaces of the heating module;
s5, the upper die moves upwards, the lower die moves downwards, and the heating module resets;
s6, controlling the upper die to move downwards again, and controlling the lower die to move upwards until the upper die and the lower die jointly press the two plastic parts, and thermally fusing the thermal fusion ribs of the two plastic parts together to form a thermal fusion part;
s7, resetting the upper die and the lower die, and taking out the hot-melt piece.
2. The dual plastic part hot melting process according to claim 1, wherein in the step S4, the heating temperature of both sides of the heating module is 180-210 ℃, and the heating time of the heating module is 9-11S.
3. The dual plastic part hot melting process according to claim 1, wherein in the step S6, the press-fit time of the upper die and the lower die is 9S-11S.
4. The double-plastic-part hot melting process according to claim 1, wherein the hot melting rib of each plastic part is arranged in a protruding mode, two circles of grooves are formed in the covering surface of each plastic part, and two circles of grooves in the same plastic part are separated by the corresponding hot melting rib.
5. The utility model provides a two plastic part hot melting equipment, its characterized in that, includes the frame, vertical sliding connection has lower mould and last mould in the frame, it is located to go up the mould directly over the lower mould, be equipped with a die cavity on the die joint face of going up the mould, be equipped with the die cavity down on the die joint face of lower mould, vertical sliding connection has the module that generates heat in the frame, the module that generates heat is located go up the mould with between the lower mould, the upper and lower both ends face of the module that generates heat is the heating surface.
6. The dual plastic part hot melting equipment according to claim 5, wherein a plurality of guide rods are vertically arranged on the frame, an upper slide plate and a lower slide plate are sequentially sleeved on the plurality of guide rods in a sliding manner from top to bottom, the upper die is fixed at the bottom of the upper slide plate, and the lower die is fixed at the top of the lower slide plate.
7. The dual-plastic part hot melting equipment according to claim 5, wherein a supporting frame is arranged on the frame, two sliding rails are arranged on the supporting frame at intervals along the longitudinal direction of the supporting frame, two sliding rails are connected with middle sliding plates in a sliding manner, the heating module comprises two heating parts, and the middle sliding plates are clamped between the two heating parts.
8. The dual plastic part hot melt apparatus of claim 7, wherein the heat generating part comprises a heat generating plate and a heating plate, the heating plate is located between the heat generating plate and the middle slide plate, and a heating pipe is disposed in the heating plate.
9. The dual plastic part hot melting equipment according to claim 5, wherein the lower die comprises a lower die plate and a bottom die, the lower die plate is arranged on the bottom die at intervals and fixedly connected with the bottom die, a positioning groove is arranged on the bottom die, a through hole is formed in the lower die plate and forms a frame shape, and the through hole and the positioning groove respectively form the upper end and the lower end of the lower die cavity.
10. The dual plastic part hot melt apparatus of claim 9, wherein the positioning slot and the upper mold cavity are provided with air holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| JP2006123378A (en) * | 2004-10-29 | 2006-05-18 | Munekata Co Ltd | Heat welding method of thermoplastic resin molding |
| CN106903895A (en) * | 2012-03-07 | 2017-06-30 | 格拉夫协同有限公司 | For the method for welding plastic material, the particularly section components of PVC |
| CN108008744A (en) * | 2016-11-02 | 2018-05-08 | 曼·胡默尔有限公司 | For adjusting or controlling the unit of Fluid pressure |
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Address after: Building 4, No. 68 Xiegang Leyuan Road, Xiegang Town, Dongguan City, Guangdong Province, 523000 Applicant after: Guangdong Xinyi Intelligent Manufacturing Co.,Ltd. Address before: Building 1, No. 68 Xiegangyuan Road, Xiegang Town, Dongguan City, Guangdong Province, 523000 Applicant before: Guangdong Xinyi Intelligent Manufacturing Co.,Ltd. |