CN110549584A - Structure of pressure-resistant oil tank and manufacturing method thereof - Google Patents
Structure of pressure-resistant oil tank and manufacturing method thereof Download PDFInfo
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- CN110549584A CN110549584A CN201910893738.8A CN201910893738A CN110549584A CN 110549584 A CN110549584 A CN 110549584A CN 201910893738 A CN201910893738 A CN 201910893738A CN 110549584 A CN110549584 A CN 110549584A
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- disc
- parison
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- sleeve
- mounting disc
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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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
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- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
the invention relates to a structure of a pressure-resistant oil tank and a manufacturing method thereof, and the key point of the technical scheme is the manufacturing method of the pressure-resistant oil tank, which comprises the following steps: s1, installing a connecting piece, wherein during installation, an installation rod is inserted into the sleeve from one end of the matching disc, and a gap is reserved between the installation disc and the matching disc; s2, feeding the connecting piece into a blow molding die by using a feeding piece, blowing out a molten parison by using a blow molding machine, putting the parison into the die, and closing the blow molding die; s3, enabling the mounting disc to be in contact with the parison, enabling the mounting disc to press the parison into the shaft hole, enabling the swaging driving piece to push the shaft sleeve to move along the shaft hole and rotate at the same time, and enabling the shaft sleeve to push the mounting disc to be abutted to the matching disc; and S4, opening the blow molding die, taking the feeding piece out of the blow molding die, then closing the blow molding die again, and opening the die again after the parison is cooled, so that the effect of improving the connection strength and stability between the breakwater and the inner wall of the pressure-resistant oil tank is achieved.
Description
Technical Field
The invention relates to the technical field of oil tanks, in particular to a structure of a pressure-resistant oil tank and a manufacturing method thereof.
Background
With the severe environment-friendly situation, the emission of fuel vehicles is gradually reduced, and even the call for stopping production of the fuel vehicles is increasingly rising, but the problems of short endurance and high later maintenance cost of the pure electric vehicle exist at present, and a plurality of technical problems of hydrogen energy vehicles are not overcome yet, so that the PHEV vehicle type is increasingly paid attention by various host factories as a transition vehicle type.
in a tank system of a general fuel vehicle, a fuel pump is operated to keep the tank pressure at 4-10KPa all the time because an internal combustion engine is always started, but in a PHEV vehicle, the vehicle can be driven by electricity for a long time without starting the internal combustion engine, so that the steam pressure in the tank reaches 30-100KPa, therefore, the tank can bear the steam pressure of 35-170KPa, and in order to meet the requirement, the production and development of a pressure-resistant tank are urgent.
the common plastic fuel tank can not bear the steam pressure because of deformation, and the cold connection (cold material and melting material connection) breaking tension of the inner bracket and the inner wall of the plastic fuel tank with the built-in breakwater is not more than 3000N, so that the common plastic fuel tank can not bear the fuel steam pressure of PHEV.
A method for forming a tank with a reinforcing structure, as known from publication US20180290536a1, comprises the steps of: the method includes forming a fuel tank such that a tank wall is provided with at least a first insert and a second insert, aligning a connection assembly of an inner wall of the fuel tank with the first insert and the second insert, the connection assembly including a rigid body, a first coupler, and a second coupler, and connecting a portion of the first insert with the first coupler and a portion of the second insert with the second coupler to restrict movement of the two tank walls relative to each other.
The oil tank needs strict coupling among all parts in the forming process, the coupling mode is also a direct insertion type mode, the coupling mode is easy to squeeze and thin and even break a molten material belt, so that the risk of quality or scrapping is brought, and the oil tank bears poor tensile force.
Disclosure of Invention
the invention aims to provide a manufacturing method of a pressure-resistant oil tank, which achieves the effect of improving the tensile force of the oil tank.
One of the technical purposes of the invention is realized by the following technical scheme:
A manufacturing method of a pressure-resistant oil tank is characterized by comprising the following steps:
s1, installing a connecting piece, wherein the connecting piece comprises a first clamping piece and a second clamping piece, the first clamping piece comprises an installing rod and an installing disc fixedly connected to the end part of the installing rod, the second clamping piece comprises a sleeve and a matching disc fixedly connected to the end part of the sleeve, the center of the matching disc is communicated with the inside of the sleeve, the installing rod is inserted into the sleeve from one end of the matching disc during installation, and a gap preset through a clamping structure is reserved between the installing disc and the matching disc;
S2, feeding the connecting piece into a blow molding die by using a feeding piece, blowing out a molten parison by using a blow molding machine, putting the parison into the die, and closing the blow molding die;
S3, enabling the mounting disc to be in contact with the parison to generate a high-strength connecting structure, enabling a shaft hole communicated with the outside to be formed in one side, opposite to the mounting disc, of the blow molding die, arranging a shaft sleeve in the shaft hole, fixedly arranging a material pressing driving piece capable of driving the shaft sleeve to rotate and translate along the shaft hole outside the blow molding die, enabling the mounting disc to press the parison into the shaft hole, enabling the material pressing driving piece to push the shaft sleeve to rotate along the shaft hole simultaneously, and enabling the shaft sleeve to push the mounting disc to be abutted to a matching disc;
S4, closing the blow molding mould and performing main blowing, and extruding the blow molding mould and cooling the blow molding mould under high-pressure air to enable the product to be molded according to the set requirement;
And S5, opening the mold to take the product away to prepare for the next production cycle after the completion.
through the technical scheme, firstly, the connecting piece is installed outside the blow molding die in advance according to requirements, then the connecting piece is sent into the blow molding die, the mounting disc is tried to hold the parison through friction force, meanwhile, the shaft sleeve rotates, the shaft sleeve is in direct contact with the parison, so that the mounting disc is driven to rotate together, the parison is further extended, the parison is stretched and coated between the mounting disc and the matching disc in the rotating process, the shaft sleeve moves forwards along the shaft hole while rotating, the first clamping piece is pressed into the second clamping piece, the first clamping piece and the second clamping piece compress the extended parison material between the mounting disc and the matching disc, therefore, the molten parison can be bonded with the connecting piece in an ironing mode, the contact area between the connecting piece and the parison is increased, the integrity between the connecting piece and the parison is stronger after cooling, the connection strength is higher, and the sleeve can be produced into various shapes according to actual requirements to achieve the effect of the wave-proof plate, compared with the prior art, the method disclosed by the invention has the advantages that the gap between the mounting disc and the matching disc can be filled up by driving the parison to partially rotate and twist, and the mounting disc is pushed to abut against the matching disc, so that the first clamping piece can be better coated by the molten parison material, the connecting strength between the connecting piece and the parison is higher, the connecting stability is better, and the pressure-resistant container is produced; the structure is simple, components do not need to be installed on the mold in the early stage in one beat of blow molding, and particularly, mass production beats are saved for products needing to be installed with a plurality of components; the connecting piece is arranged on the same side of the container wall, so that inaccurate centering caused by the change or vibration of the connecting piece is avoided, and the rejection rate is reduced; meanwhile, the connecting piece and the container wall do not need strict coupling, and compared with direct insertion coupling, the rotating process is less prone to extrusion thinning and even breaking of the molten material belt, so that the final product quality is improved, and the scrapping risk is reduced.
the invention is further configured to: with the interior wall connection of oil tank body the mounting disc is the flabellum form fluting, and the cooperation dish deviates from the surface of sleeve one side and offers a plurality of draw-in grooves with the flabellum joint of mounting disc, and the size of draw-in groove is not less than the size of flabellum, and in step S3, press the material driving piece to drive the axle sleeve through translation and rotation mode along the shaft hole motion, the axle sleeve promote the mounting disc to with the cooperation dish butt, and in the flabellum card of mounting disc goes into the draw-in groove, finally make melt material can wrap up the mounting disc and extrude simultaneously and be connected to the cooperation.
Through the technical scheme, press the material driving piece to drive the axle sleeve when moving along the shaft hole, can promote the installation pole and insert inside the sleeve, thereby make the flabellum card of mounting disc go into in the draw-in groove, consequently area of contact between mounting disc and the cooperation dish is bigger, and the installation pole deepens gradually telescopic in-process, in the molten type parison material can imbed the draw-in groove, also can be with the tighter of molten type blank with mounting disc and cooperation dish joint when the mounting disc rotates, thereby the compactness of being connected between connecting piece and the parison has been improved greatly.
the invention is further configured to: the both sides of mounting disc and the draw-in groove of cooperation dish are unevenness form, in step S3, impress the gap on unevenness' S surface with the parison after axle sleeve and mounting disc butt, and when mounting disc and cooperation dish butt, the mounting disc was driven to rotate and is made the fused parison by tensile and endocyst in the gap between mounting disc and the cooperation dish.
Through the technical scheme, the axle sleeve drives the mounting disc and rotates and remove towards the direction that is close to the cooperation dish, consequently can impress fused parison material in the clearance of mounting disc and cooperation dish, when mounting disc and cooperation dish joint cooperation, fused parison material can fill in the clearance on unevenness's surface, make between mounting disc and the cooperation dish, area of contact is bigger between mounting disc and the parison, it is more firm to cool down the after-fixing, thereby further improved the connection reliability and the stability between connecting piece and the parison, consequently, the resistant tension of oil tank body improves greatly.
The invention is further configured to: the fixed snap ring that is provided with on the circumference face of installation pole, telescopic inside is fixed to be provided with and is used for blocking the snap ring in order to prevent the primary clip shoulder that the installation pole drops, in step S1, insert the installation pole in the sleeve, make the snap ring cross primary clip shoulder and form the butt.
Through above-mentioned technical scheme, when the connecting piece is installed outside the blow molding die, make the installation pole insert inside the sleeve, cross a card shoulder until the snap ring, owing to a card shoulder to the joint effect of snap ring, can prevent that the installation pole from droing from the sleeve is inside this moment to make the connecting piece scald the fixed in-process of knot and be difficult for taking place to drop with molten parison, the installation of connecting piece is more reliable and more stable, and the connecting piece also further improves to the reinforcing capacity of oil tank body.
The invention is further configured to: the snap ring is located the one end position department that the installation pole deviates from the mounting disc, and after the snap ring crossed a calorie of shoulder, the distance between mounting disc and the cooperation dish was the radius length of mounting disc, and the distance between mounting disc and the cooperation dish holds the melt material that is about to extrude.
Through above-mentioned technical scheme, after the snap ring crossed a calorie of shoulder, distance between mounting disc and the cooperation dish was the radial length of mounting disc, therefore the mounting disc was when rotation and level removed towards the direction of cooperation dish, and fused parison can be stretched and the clearance between endocyst mounting disc and the cooperation dish, and parison can not excessively stretch simultaneously, guarantees that the wall thickness is not influenced, when guaranteeing the shaping quality of withstand voltage oil tank, can improve the goodness of being connected between connecting piece and the parison.
the invention is further configured to: the size of the fitting disk is larger than that of the mounting disk, and in step S3, the mounting disk is pressed into the shaft hole to bring the fitting disk into contact with the parison on the inner wall of the blow mold.
Through above-mentioned technical scheme, the size of cooperation dish is greater than the size of mounting disc, and consequently the mounting disc is when stretching into the shaft hole inside, and the cooperation dish just moves towards the cooperation dish at the in-process towards the rotation of mounting disc with the parison butt of blow mold inner wall for the area of contact of parison and cooperation dish is bigger, therefore the parison is higher with the stability of being connected of connecting piece.
the invention is further configured to: in step S3, the pressing driving member drives the shaft sleeve to rotate 60 to 120 degrees.
Through the technical scheme, the material pressing driving part drives the shaft sleeve to rotate by 60-120 degrees, so that the parison can be driven to extend and enclose a gap between the mounting disc and the matching disc, the connection stability of the connecting piece and the parison is improved, the wall thickness of a final pressure-resistant oil tank caused by excessive stretching of the parison can be prevented from being influenced, and the strength and the tensile strength of the oil tank body are guaranteed.
the invention is further configured to: the circumference outer wall integrated into one piece of sleeve has breakwater or other connection structure.
through above-mentioned technical scheme, can be as required at telescopic circumference outer wall installation wave breaker or other connection structure for the connecting piece also can play supplementary unrestrained or other effects of preventing when improving the tensile ability of intensity of oil tank body.
The second technical object of the present invention is to provide a structure of a pressure-resistant oil tank, which can improve the connection strength and stability between a breakwater and the inner wall of the pressure-resistant oil tank.
The second technical purpose of the invention is realized by the following technical scheme:
The structure of the pressure-resistant oil tank comprises the at least one connecting piece.
through the technical scheme, the pressure-resistant oil tank adopting the connecting piece has stronger strength and tensile force resistance, and compared with the prior art, the connecting piece is not welded and is completely formed under the action of materials, so that the connecting piece and the pressure-resistant oil tank are stronger in integration; and two clamping structures separating the pressure-resistant oil tank wall do not exist, and the process of installing the clamping structures for the die does not exist, so that the connecting piece and the wave-proof plate are installed in the pressure-resistant oil tank more simply, and the wall thickness risk does not exist.
In conclusion, the beneficial technical effects of the invention are as follows:
1. The mounting disc is abutted against the molten parison and drives the mounting disc and the parison at the corresponding position to rotate, so that the connecting piece can be coated by the parison, the connecting piece and the parison are connected and cooled and solidified in the die, the connection tightness of the connecting piece and the pressure-resistant oil tank is improved, and the reinforcing capacity of the connecting piece on the oil tank body is greatly enhanced;
2. The mounting disc and the matching disc are arranged into mutually matched clamping structures, so that the mounting disc and the matching disc can be stably ironed with a molten parison and can be mutually clamped to form a whole, and the connection integrity of the connecting piece and the parison is improved;
3. the clamping ring is matched with the primary clamping shoulder, so that the mounting rod is not easy to fall off after being inserted into the sleeve, and the ironing fixation of the connecting piece and the parison is more stable and reliable;
4. When the invention is produced, the part does not need to be installed on the mould at the earlier stage of one production beat of the blow molding label, and particularly for the product needing to be installed with a plurality of parts, the time for mass production is saved;
5. The connecting piece is positioned on the same side of the inner wall of the oil tank body, so that inaccurate centering caused by tolerance change of a matching piece or equipment vibration is avoided, and the rejection rate is reduced;
6. through the ironing connection of connecting piece and melting blank, do not need the strict coupling between the part, and rotatory process compares in prior art's disect insertion coupling, is difficult to squeeze the thinning and even breaks the material area of molten state, therefore final fashioned oil tank body structure quality is higher, scrap the risk lower.
Drawings
FIG. 1 is a schematic view showing the structure of an oil tank body in example 1;
FIG. 2 is a schematic structural view of a connector;
FIG. 3 is a cross-sectional view of the connector;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is a schematic structural view of the first card member;
FIG. 6 is a schematic view of a pressure-resistant fuel tank in embodiment 2, to which a connector is attached;
Fig. 7 is a schematic structural view of the pressure-resistant fuel tank of embodiment 2 when mounted.
Reference numerals: 1. a connecting member; 11. a first clip member; 111. mounting a rod; 1111. a snap ring; 112. mounting a disc; 12. a second clip member; 121. a sleeve; 1211. primary shoulder clamping; 1212. a wave-proof plate; 122. a mating tray; 1221. a card slot; 1222. a jack; 2. a protrusion; 3. a blow mold; 31. a shaft hole; 32. a shaft sleeve; 33. a material pressing driving part; 4. a feeding member; 41. feeding driving; 5. the oil tank body.
Detailed Description
the present invention will be described in further detail with reference to the accompanying drawings.
Example 1
The utility model provides a structure of withstand voltage oil tank, as shown in figure 1, including oil tank body 5, the fixed at least one connecting piece 1 that is provided with of inner wall of oil tank body 5, connecting piece 1 is still in the melting parison state at oil tank body 5 and just scalds to tie fixedly, thereby it is fixed to make connecting piece 1 and oil tank body 5 can form an organic whole, connecting piece 1 can bear higher tensile force, when making the oil tank body be used for the PHEV vehicle, can be applicable to great negative pressure to malleation scope, thereby the intensity and the quality of oil tank body 1 have been improved, also can play the wave-proof effect at connecting piece 1 upper fixed connection wave-proof board 1212, or fix other parts on connecting piece 1 as required. Connecting piece 1 compares in prior art with the connected mode of oil tank body 5, does not need the welding process, does not have the joint structure that separates the oil tank wall yet, has improved the convenient degree of connecting piece 1 and oil tank body 5 when the erection joint, does not have the wall thickness risk simultaneously yet, and oil tank body 5's quality is higher.
With reference to fig. 2 and 3, the connecting member 1 includes a first clamping member 11 and a second clamping member 12, the first clamping member 11 includes an integrally formed mounting rod 111 and a mounting plate 112, the mounting plate 112 is fixedly connected to one end of the mounting rod 111, and the mounting plate 112 is a uniformly distributed fan-shaped slot; second fastener 12 includes sleeve 121 and cooperation dish 122, cooperation dish 122 fixed connection is in the one end of sleeve 121, a plurality of draw-in grooves 1221 have been seted up towards one side of mounting disc 112 to cooperation dish 122, in draw-in groove 1221 can be blocked to the flabellum of mounting disc 112, and the size of draw-in groove 1221 is not less than the flabellum size of mounting disc 112, preferably the size of draw-in groove 1221 is greater than the size of flabellum in this embodiment, make the flabellum can smoothly block in draw-in groove 1221.
with reference to fig. 3 and 4, a socket 1222 is formed in the center of the matching plate 122, the sleeve 121 is hollow, the socket 1222 is communicated with the inside of the sleeve 121, the cross-sectional size of the socket 1222 is consistent with the cross-sectional size of the inside of the sleeve 121 and is matched with the mounting rod 111, the mounting rod 111 and the sleeve 121 are relatively fixed by a clamping structure, the clamping structure has a plurality of forms, and the mounting rod 111 is prevented from being separated from the sleeve 121, in this embodiment, the preferred clamping structure is: the circumferential surface of the mounting rod 111 is fixedly provided with a snap ring 1111, the snap ring 1111 is located at one end of the mounting rod 111 far away from the mounting disc 112, a primary clip shoulder 1211 is fixedly arranged at a position corresponding to the inner wall of the sleeve 121, the primary clip shoulder 1211 is obliquely arranged in the direction away from the matching disc 122, the oblique direction faces the central axis of the sleeve 121, and the connecting piece 1, the snap ring 1111 and the primary clip shoulder 1211 are made of plastic materials and have certain flexibility and elasticity. Both sides of the mounting plate 112 and the inside of the locking groove 1221 of the fitting plate 122 are uneven to increase the contact area, and in this embodiment, it is preferable that the protrusions 2 are fixedly disposed on both sides of the mounting plate 112 and the inside of the locking groove 1221 of the fitting groove 122. The wave guard plates 1212 can be selectively installed on the circumferential outer wall of the sleeve 121, and when the wave guard plates 1212 are not installed, the connecting member 1 itself can serve as a wave guard assembly.
a circle of secondary clamping shoulders 6 are fixedly arranged at the inner wall position of one end of the sleeve 121, which is far away from the matching disc 122, and the assembling disc 11 and the matching disc 12 are positioned only by the primary clamping shoulders 1211 when being assembled, so that the requirement of a certain distance between the mounting disc 112 and the matching disc 122 can be ensured; when the mold is closed in the mold, the installation rod 111 is continuously compressed by large pressure, the installation rod 111 is continuously inserted along with the rotation of the installation plate 11, and when the installation rod 111 is completely inserted into the sleeve 121, the clamping ring 1111 passes over the secondary clamping shoulder 6, so that the installation rod cannot fall off.
The implementation principle of the embodiment is as follows: when the connecting piece 1 is installed, the installation rod 111 is firstly inserted into the insertion hole 1222 and the sleeve 121, the snap ring 1111 is made to cross the primary snap shoulder 1211 to prevent the installation rod 111 from falling off from the sleeve 121, then the connecting piece 1 is sent into the blow molding die 3, the installation disk 112 is made to abut against a blow-molded parison, then the installation disk 112 is driven by external driving to rotate and extrude the molten parison at the same time, the installation disk 112 is driven by the external driving to rotate and extrude the molten parison completely, or the installation disk 112 is driven by the external driving to extrude the molten parison at the same time, or in the embodiment, the installation disk 112 is preferably driven by the external driving to rotate and extrude the molten parison at the same time, and the stretching deformation rate of the parison can be guaranteed to be the lowest. Causing the disk 112 to stretch and encapsulate the molten parison around the disk 112 while the parison enters the gap between the disk 112 and the mating disk 122; the mounting plate 112 is continuously close to the matching plate 122 until the mounting plate 112 abuts against the matching plate 122, the process can enable the molten parison to bond the mounting plate 112 and the matching plate 122 more tightly, and the arrangement of the protrusions 2 increases the contact area and the friction force between the mounting plate 112 and the matching plate 122 and between the mounting plate 112 and the parison, so that the connection between the connecting piece 1 and the parison is tighter and more stable. At this time, the strength and the stretch resistance of the tank body 5 are greatly improved.
Moreover, the pressure-resistant oil tank of the present embodiment may be installed on other structures as a pressure-resistant tank body, and the pressure-resistant oil tank of the present embodiment may also be used for installing the breakwater 1212 or not installing the breakwater 1212, or for installing other valve sets.
Besides being suitable for manufacturing pressure-resistant oil tanks of automobiles, the structure can also be used for manufacturing other pressure-resistant blow-molded tanks or boxes, such as urea tanks, high-pressure water tanks and other blow-molded products, and also comprises single-layer and multi-layer blow-molded products.
example 2
A manufacturing method of a pressure-resistant oil tank comprises the following steps:
s1, installing the connector 1, wherein the installation rod 111 passes through the insertion hole 1222 and is inserted into the sleeve 121 until the snap ring 1111 passes the primary snap shoulder 1211, and at this time, the gap between the installation disc 112 and the matching disc 122 is the radial distance of the installation disc 112;
s2, the connecting piece 1 is sent into a blow molding mold 3, a feeding piece 4 used for sending the connecting piece 1 into the blow molding mold 3 is installed on a blow molding machine, a feeding drive 41 for temporarily placing the connecting piece 1 and driving the connecting piece 1 to translate is fixedly arranged on the feeding piece 4, and the feeding drive 41 is preferably an air cylinder; as shown in fig. 7;
S3, extruding the molten parison by an extruder, then placing the parison into a blow molding die 3, and starting a die closing process by the blow molding die 3; a shaft hole 31 communicated with the outside is formed in the blow molding die 3, a shaft sleeve 32 is arranged in the shaft hole 31 in a sliding manner, and a material pressing driving piece 33 capable of driving the shaft sleeve 32 to rotate and translate along the shaft hole 31 is fixedly arranged outside the blow molding die 3; combine fig. 6 and fig. 7;
S4, after the feeding piece 4 drives the connecting piece 1 to extend into the blow molding mold 3 and enables the connecting piece 1 to face the shaft hole 31, the feeding driver 41 drives the connecting piece 1 to move horizontally, the mounting disc 112 is enabled to be in contact with the molten parison to generate a high-strength connecting system, the feeding driver 41 presses the parison into the shaft hole 31 through the mounting disc 112, and meanwhile the matching disc 122 is abutted to the surface of the parison; combine fig. 6 and fig. 7;
S5, the pressing driving member 33 drives the shaft sleeve 32 to rotate and translate along the shaft hole 31, the pressing driving member 33 drives the shaft sleeve 32 to rotate a certain angle, including 0 degree rotation, preferably 60 to 120 degrees in this embodiment, when the shaft sleeve 32 rotates, the parison can be driven to wrap the mounting plate 112, and the molten parison is further stretched, the molten parison is contained between the mounting disk 112 and the matching disk 122 in the process of rotating the mounting disk 112 until the mounting disk 112 is compacted under continuous pressure after the mounting disk 112 is abutted against the matching disk 122, the mounting disk 112 and the matching disk 122 re-compress the partially rotated parison in the gap between the first clamping piece 11 and the second clamping piece 12, meanwhile, the fan blade part of the mounting disc 112 is arranged in the clamping groove 1221, force is further applied to the molten parison through the pressing driving part 33, the molten parison at the fan blade vacant part of the mounting disc 112 is extruded and fused, and at the moment, the mounting disc 112 and the bulge 2 on the surface of the matching disc 122 are sintered with the molten parison; combine fig. 6 and fig. 7;
S6, closing the blow mold 3 to blow, extruding the blow mold 3 and cooling the blow mold under high pressure air to enable the product to be molded according to the set requirement;
S7, after the end, the blow mold 3 is opened to take the product away, ready for the next cycle.
The implementation principle of the embodiment is as follows: after the feeding drive 41 abuts the mounting disc 112 and the parison in the blow mold 3, the gap between the fan blades of the mounting disc 112 can grasp the parison, then the pressing drive 33 drives the parison at the corresponding position and the first clamping piece 11 to rotate, at this time, the parison is further extended, the molten parison is stretched and wrapped in the rotating process, so that the gap between the mounting disc 112 and the matching disc 122 can be filled with the parison; after the first clamping piece 11 is compressed to enable the first clamping piece 11 to be completely inserted into the second clamping piece 12, the mounting disc 112 is abutted against the surface of the matching disc 122, in the process, the molten parison can be extended and compressed between the first clamping piece 11 and the second clamping piece 12, meanwhile, the mounting disc 112 and the matching disc 122 are embedded in a convex-concave combination mode, force is further applied to the molten parison, the molten parison is extruded and fused, and the connecting stability and reliability of the connecting piece 1 and the parison are further improved by the fusion of the bulges 2 and the parison between the mounting disc 112 and the matching disc 122 and between the mounting disc 112 and the parison, when the oil tank body processed by the manufacturing method is used for a hybrid vehicle type, the position of the connecting piece can have a strong tensile force effect, so that the high-pressure resistance of the whole oil tank body 5 is enhanced, the whole structure is simple, and no complex coupling structure exists, mass production beats are saved, the connecting piece 1 can be fixed on the inner side of the oil tank body 5 by ironing, on one hand, inaccurate centering caused by change or vibration of the connecting piece is avoided, and the rejection rate is reduced; on the other hand adopts the mode of rotatory feeding to scald the knot with connecting piece 1 and oil tank body 5 and fixes, and the extrusion attenuation is difficult to in the molten material area, and the quality is higher, do not have the wall thickness risk, and the final stretch-proofing ability of oil tank body 5 also improves greatly simultaneously.
The embodiments of the present invention are preferred embodiments, and the scope of the present invention is not limited by the embodiments, and therefore: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (9)
1. A manufacturing method of a pressure-resistant oil tank is characterized by comprising the following steps:
s1, installing the connecting piece (1), wherein the connecting piece (1) comprises a first clamping piece (11) and a second clamping piece (12), the first clamping piece (11) comprises an installing rod (111) and an installing disc (112) fixedly connected to the end part of the installing rod (111), the second clamping piece (12) comprises a sleeve (121) and a matching disc (122) fixedly connected to the end part of the sleeve (121), the center of the matching disc (122) is communicated with the inside of the sleeve (121), the installing rod (111) is inserted into the sleeve (121) from one end of the matching disc (122) during installation, and a gap preset through a clamping structure is reserved between the installing disc (112) and the matching disc (122);
S2, feeding the connecting piece (1) into a blow molding die (3) by using a feeding piece (4), extruding a molten parison by using a blow molding machine, putting the parison into the die, and closing the blow molding die (3);
S3, enabling the mounting disc (112) to be in contact with the parison to generate a high-strength connecting structure, arranging a shaft hole (31) communicated with the outside on one side of the blow molding die (3) opposite to the mounting disc (112), arranging a shaft sleeve (32) in the shaft hole (31), fixedly arranging a material pressing driving piece (33) capable of driving the shaft sleeve (32) to rotate and move horizontally along the shaft hole (31) outside the blow molding die (3), enabling the mounting disc (112) to press the parison into the shaft hole (31), pushing the shaft sleeve (32) to move along the shaft hole (31) and rotate simultaneously by the material pressing driving piece (33), and pushing the mounting disc (112) to be abutted against the matching disc (122) by the shaft sleeve (32);
S4, closing the blow mold (3) and blowing, and pressing the blow mold (3) and cooling under high-pressure air to enable the product to be molded according to the set requirement;
And S5, opening the mold to take the product away to prepare for the next production cycle after the completion.
2. the manufacturing method of the pressure-resistant oil tank as claimed in claim 1, wherein the mounting disc (112) connected to the inner wall of the oil tank body (5) is provided with a fan-blade-shaped slot, the surface of the matching disc (122) on the side away from the sleeve (121) is provided with a plurality of clamping grooves (1221) clamped with the fan blades of the mounting disc (112), the size of each clamping groove (1221) is not smaller than that of each fan blade, in step S3, the pressing driving member (33) drives the shaft sleeve (32) to move along the shaft hole (31) in a translation and rotation mode, the shaft sleeve (32) pushes the mounting disc (112) to abut against the matching disc (122), and the fan blades of the mounting disc (112) are clamped into the clamping grooves (1221), so that molten material can wrap the mounting disc (112) and be connected to the matching disc (122) in an extruding mode at the same time.
3. The method of claim 2, wherein the both sides of the mounting plate (112) and the inside of the engaging groove (1221) of the engaging plate (122) are uneven, and in step S3, the parison is pressed into the gap between the uneven surfaces after the shaft sleeve (32) abuts against the mounting plate (112), and when the mounting plate (112) abuts against the engaging plate (122), the mounting plate (112) is rotated so that the molten parison is stretched and enclosed in the gap between the mounting plate (112) and the engaging plate (122).
4. the method of claim 1, wherein a snap ring (1111) is fixedly disposed on a circumferential surface of the mounting rod (111), a primary snap shoulder (1211) for catching the snap ring (1111) to prevent the mounting rod (111) from falling off is fixedly disposed inside the sleeve (121), and in step S1, the mounting rod (111) is inserted into the sleeve (121) such that the snap ring (1111) passes over the primary snap shoulder (1211) to form an abutment.
5. The method for manufacturing a pressure-resistant oil tank as claimed in claim 4, wherein the snap ring (1111) is located at an end position of the mounting rod (111) facing away from the mounting disc (112), after the snap ring (1111) passes over the primary snap shoulder (1211), the distance between the mounting disc (112) and the mating disc (122) is the radius length of the mounting disc (112), and the distance between the mounting disc (112) and the mating disc (122) accommodates molten material to be extruded.
6. A method of manufacturing a pressure-resistant fuel tank as claimed in claim 1, wherein the size of the fitting plate (122) is larger than that of the mounting plate (112), and in step S3, the mounting plate (112) is made to press the parison into the shaft hole (31), and the fitting plate (122) abuts against the parison on the inner wall of the blow mold (3).
7. the method for manufacturing a pressure-resistant oil tank as claimed in claim 1, wherein in step S3, the pressing driving member (33) drives the shaft sleeve (32) to rotate 60-120 degrees.
8. a method for manufacturing a pressure-resistant fuel tank as claimed in claim 1, wherein the peripheral outer wall of the sleeve (121) is integrally formed with a breakwater (1212) or other connecting structure.
9. A structure of a pressure-resistant fuel tank, characterized by comprising at least one connector (1) according to any one of claims 1 to 8.
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