CN113263685A - Injection molding process for slender water pipe - Google Patents

Injection molding process for slender water pipe Download PDF

Info

Publication number
CN113263685A
CN113263685A CN202110439457.2A CN202110439457A CN113263685A CN 113263685 A CN113263685 A CN 113263685A CN 202110439457 A CN202110439457 A CN 202110439457A CN 113263685 A CN113263685 A CN 113263685A
Authority
CN
China
Prior art keywords
water
injection molding
die cavity
water pipe
injection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110439457.2A
Other languages
Chinese (zh)
Other versions
CN113263685B (en
Inventor
谢如顺
陈国平
许后继
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changzhou Baodun Electronic Machinery LLC
Original Assignee
Changzhou Baodun Electronic Machinery LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Changzhou Baodun Electronic Machinery LLC filed Critical Changzhou Baodun Electronic Machinery LLC
Priority to CN202110439457.2A priority Critical patent/CN113263685B/en
Publication of CN113263685A publication Critical patent/CN113263685A/en
Application granted granted Critical
Publication of CN113263685B publication Critical patent/CN113263685B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C45/1705—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles using movable mould parts
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C2045/1719—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles making tubular articles
    • 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
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The invention relates to the field of injection molding, in particular to an injection molding process of a slender water pipe, which is characterized by sequentially comprising the following steps of: s1, placing the pushing bullet into a water injection connector on the water auxiliary equipment by an external manipulator; s2, closing the die assembly above the water auxiliary equipment; s3, performing injection molding on the mold by an injection molding machine above the mold component; s4, spraying water to a die cavity in the die assembly by using water auxiliary equipment to push the material pushing bullet to move in the die cavity; s5, opening the mold after the mold assembly is cooled, and taking out the water pipe in the mold cavity by an external manipulator; s6, cleaning waste materials at the upper end and the lower end of the water pipe, and simultaneously taking out the pushing bullet; the invention aims to provide an injection molding process for a slender water pipe, which is used for improving the uniformity of the inner wall of an injection molded product, reducing the wall thickness of the product, reducing the consumption of raw materials and simultaneously achieving the beneficial effect of preventing injected water from entering an injection molding machine.

Description

Injection molding process for slender water pipe
Technical Field
The invention relates to the field of injection molding, in particular to an injection molding process for a slender water pipe.
Background
Water-assisted injection molding is a novel molding process for producing hollow or partially hollow articles. It utilizes high pressure water to form a cavity in an injection molded part and maintains pressure on the part. The principle is similar to that of gas-assisted injection molding, and the gas-assisted injection molding method is widely applied to automobile products such as automobile pipelines, traveling racks, automobile door handles and the like. The product injection-molded in the prior art has thick and uneven wall thickness and large material consumption, and simultaneously, injected water is easy to push into an injection molding machine.
Disclosure of Invention
The invention aims to provide an injection molding process for a slender water pipe, which is used for improving the uniformity of the inner wall of an injection molded product, reducing the wall thickness of the product, reducing the consumption of raw materials and simultaneously achieving the beneficial effect of preventing injected water from entering an injection molding machine.
In order to solve the technical problem, the injection molding process of the slender water pipe is characterized by sequentially comprising the following steps of:
s1, placing the pushing bullet into a water injection connector on the water auxiliary equipment by an external manipulator;
s2, closing the die assembly above the water auxiliary equipment;
s3, performing injection molding on the mold by an injection molding machine above the mold component;
s4, spraying water to a die cavity in the die assembly by using water auxiliary equipment to push the material pushing bullet to move in the die cavity;
s5, opening the mold after the mold assembly is cooled, and taking out the water pipe in the mold cavity by an external manipulator;
and S6, cleaning waste materials at the upper end and the lower end of the water pipe, and simultaneously taking out the pushing bullet.
Further, the mold assembly in step S2 includes: the water pipe mould that opens and shuts about a plurality of groups to adjacent two sets of water pipe mould is spliced from top to bottom sealedly, the water pipe mould top that is located the superiors is provided with the guide mould that opens and shuts about can controlling, the water pipe mould below that is located the lower floor is provided with the regulation mould that opens and shuts about can, guide mould middle part is provided with first die cavity, the middle part of every water pipe mould of group is provided with the second die cavity, it is provided with the third die cavity to adjust the mould middle part, first die cavity, second die cavity and third die cavity establish ties the intercommunication each other, first die cavity top is provided with the mouth of moulding plastics, adjust the mould lower terminal surface be provided with the opening and communicate with the third die cavity.
Further, the water assist apparatus in the step S1 includes: the sprinkler, the sprinkler below is provided with the inlet outlet, the sprinkler up end links to each other and seals with the adjusting die lower terminal surface, sprinkler top middle part is provided with the guiding gutter, the guiding gutter internal diameter is greater than the opening internal diameter, the guiding gutter middle part is provided with the water injection connector, water injection connector external diameter is less than the opening internal diameter, water injection connector up end and sprinkler up end parallel and level, the water filling port has been seted up at water injection connector middle part, water filling port upper portion is provided with the spacing groove, the water filling port sets up with the opening is coaxial with the adjusting die, the water filling port passes through the pipeline and links to each other with the inlet outlet of sprinkler below.
Further, the step S4 is composed of the following steps:
a1, a water inlet and a water outlet are communicated with a gas tank, air is sprayed into the third die cavity, and a material pushing bullet is suspended above a water injection port;
and A2, continuing to jet air after the pushing bullet is suspended to keep the pressure of the air pushed into the water injection port stable.
A3, a water inlet and a water outlet are communicated with a water storage tank, water is continuously sprayed to a water injection port, and the speed of a material pushing bullet is increased to a process set speed;
a4, the water inlet and outlet are continuously communicated with the water storage tank, the water sprayer continuously sprays water, and the pushing bullet is kept to advance at a constant speed at a process set speed;
a5, when the pushing warhead reaches the injection molding opening, the water sprayer reduces the water spraying amount and keeps the pressure at the water injection opening constant;
a6, increasing the water spraying amount by a water sprayer, improving the pressure at the water injection port, and extruding the pushing bullet forward to enable the pushing bullet to be clamped at the injection port;
and A7, after the water pipe in the die cavity is cooled and formed, the water inlet and the water outlet are communicated with the recovery pool, and water in the first die cavity, the second die cavity and the third die cavity is discharged into the recovery pool.
And the gas in the gas tank is sprayed into a water sprayer through a cylinder, and the gas spraying time, the gas spraying speed, the gas spraying pressure and the gas spraying amount are regulated through the water sprayer.
The water in the water storage tank is sent into the water sprayer through the water pump, and the water spraying time, the air spraying speed, the air spraying pressure and the air spraying amount are adjusted through the water sprayer.
Further, the material pushing warhead in the step S4 includes: the base is of a cylindrical structure, the bullet body is fixed above the middle of the base, the outer diameter of the bullet body is smaller than the outer diameter of the base, the top of the bullet body is of a conical structure, the lower part of the bullet body is of a cylindrical structure, the outer diameter of the base is larger than the inner diameter of an injection molding opening, and the base is in clearance fit with a limiting groove.
Furthermore, a boosting groove is formed below the base.
Furthermore, a first corner is arranged at the upper part of the third die cavity.
Furthermore, a second corner is arranged at the connecting part of the first mold cavity and the injection molding opening.
Furthermore, the water quality requirement of the water in the water storage tank is as follows:
the pH value is 6-9;
the chloride content is not higher than 1000 mg/l;
the content of sulfate is not higher than 70-300 mg/l;
the nitrate content is not higher than 100 mg/l;
the content of corrosive carbonic acid is not higher than 20-50 mg/l;
the oxygen content is not higher than 2 mg/l;
the content of ammonium is not higher than 2-20 mg/l;
the iron content is not higher than 10 mg/l;
the manganese content is not higher than 1 mg/l;
the free chloride is not higher than 5 mg/l.
Compared with the prior art after adopting above structure, have following beneficial effect:
the invention discloses an injection molding process of a slender water pipe, which improves the uniformity of the wall of an injection molded pipe by placing a material pushing bullet on a water injection port, and can reduce the wall thickness of the pipe wall and reduce the material consumption of a pipe fitting. Meanwhile, water in a mold cavity can be effectively prevented from entering the injection molding machine in the water injection process, the dilution of raw materials is reduced, and the damage to the injection molding machine is prevented.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic view of an injection molding process for a slender water pipe according to the present invention;
FIG. 2 is a schematic view of another mold of the injection molding process for a slender water pipe according to the present invention
FIG. 3 is a schematic view of a water filling port of an injection molding process for a slender water pipe according to the present invention;
FIG. 4 is a schematic view of a material-pushing warhead of the injection molding process for a slender water pipe according to the present invention;
in the figure: 1-mould assembly, 11-water pipe mould, 12-guide mould, 13-adjusting mould, 121-first mould cavity, 111-second mould cavity, 131-third mould cavity, 122-injection moulding opening, 132-opening, 2-water auxiliary equipment, 21-water sprayer, 22-water inlet and outlet, 23-material pushing bullet, 212-water injection connector, 211-diversion groove, 212-water injection connector, 213-water injection opening, 214-limiting groove, 7-gas tank, 8-water storage tank, 9-recovery tank communicating, 231-base, 232-bullet body, 233-boosting groove, 133-first corner and 123-second corner.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims.
As shown in fig. 1-4, an injection molding process for a slender water pipe is characterized by sequentially comprising the following steps:
s1, the external manipulator puts the base 231 of the pushing bullet 23 into the limit groove 214 at the water injection connector 212 on the water auxiliary equipment 2;
s2, closing the mould assembly 1 above the water auxiliary equipment 2;
s3, performing injection molding on the mold by an injection molding machine above the mold component 1;
s4, spraying water to the die cavity in the die component 1 by the water auxiliary equipment 2 to push the material pushing bullet 23 to move in the die cavity;
s5, opening the mold after the mold assembly 1 is cooled, and taking out the water pipe in the mold cavity by an external manipulator;
and S6, cleaning the waste materials at the upper end and the lower end of the water pipe, and simultaneously taking out the pushing bullet 23.
Further, the mold assembly 1 in the step S2 includes: the water pipe mould 11 that opens and shuts about a plurality of groups to adjacent two sets of water pipe mould 11 splice from top to bottom sealed, the water pipe mould 11 top that is located the superiors is provided with the guide mould 12 that opens and shuts about can controlling, the water pipe mould 11 below that is located the lower floor is provided with the regulation mould 13 that opens and shuts about can, guide mould 12 middle part is provided with first die cavity 121, the middle part of every water pipe mould 11 of group is provided with second die cavity 111, it is provided with third die cavity 131 to adjust mould 13 middle part, first die cavity 121, second die cavity 111 and third die cavity 131 intercommunication of establishing ties each other, first die cavity 121 top is provided with injection molding mouth 122, adjust the terminal surface under the mould 13 and be provided with opening 132 and communicate with third die cavity 131.
Further, the water assist apparatus in the step S1 includes: the water sprayer 21 is provided with a water inlet and outlet 22 below the water sprayer 21, the upper end face of the water sprayer 21 is connected with and sealed with the lower end face of the adjusting mold 13, the middle part above the water sprayer 21 is provided with a guide groove 211, the inner diameter of the guide groove 211 is larger than that of the opening 132, and during injection molding, raw materials in a molten state can flow into the guide groove, so that sealing is provided and positioning can be provided for the material pushing bullet at the same time.
Guide slot 211 middle part is provided with water injection connector 212, water injection connector 211 external diameter is less than opening 132 internal diameter, water injection connector 212 up end and water sprayer 21 up end parallel and level, water filling port 213 has been seted up at water injection connector 212 middle part, water filling port 213 upper portion is provided with spacing groove 214, water filling port 213 and the coaxial setting of opening 132 of adjusting mould 13, water filling port 213 passes through the pipeline and links to each other with inlet outlet 22 of water sprayer 21 below.
Further, when the injection-molded pipe has an outer diameter of 30mm and a wall thickness of 2.5mm, the step S4 is comprised of the steps of:
a1, a water inlet and a water outlet are communicated with a gas tank, air is sprayed into the third die cavity, and a material pushing bullet is suspended above a water injection port; at the moment, the outlet of the gas tank is at 200-230cm3The gas is supplied at a speed of 100-;
a2, continuing to jet air after the pushing warhead is suspended to keep the pressure of the air pushed into the water injection port stable; at the time, the outlet of the gas tank is at 30-50cm3A gas is supplied at a rate of 100-;
a3, a water inlet and a water outlet are communicated with a water storage tank, water is continuously sprayed to a water injection port, and the speed of a material pushing bullet is increased to a process set speed; at the moment, the water outlet of the water storage tank is 50-60cm3Providing water at a pressure of 50-240bar at a speed/s for 0.5-1 second;
a4, the water inlet and outlet are continuously communicated with the water storage tank, the water sprayer continuously sprays water, and the pushing bullet is kept to advance at a constant speed at a process set speed; at the moment, the water outlet of the water storage tank is 100-170cm3The water with the pressure of 250bar is extracted at the speed of 100 per second for 2 to 4 seconds;
a5, when the pushing warhead reaches the injection molding opening, the water sprayer reduces the water spraying amount and keeps the pressure at the water injection opening constant; at the moment, the water outlet of the water storage tank is positioned at 0-10cm3Extracting water with pressure of 0-50bar at a speed of/s for 0.1-0.3 s;
a6, increasing the water spraying amount by a water sprayer, improving the pressure at the water injection port, and extruding the pushing bullet forward to enable the pushing bullet to be clamped at the injection port; at the moment, the water outlet of the water storage tank is 10-60cm3A speed of 200 and 240bar pressure of water for 1-3 seconds;
and A7, after the water pipe in the die cavity is cooled and formed, the water inlet and the water outlet are communicated with the recovery pool, and water in the first die cavity, the second die cavity and the third die cavity is discharged into the recovery pool.
Further, when the injection-molded pipe has an outer diameter of 12mm and a wall thickness of 2.25mm, the step S4 is comprised of the steps of:
a1, a water inlet and a water outlet are communicated with a gas tank, air is sprayed into the third die cavity, and a material pushing bullet is suspended above a water injection port; at the moment, the outlet of the gas tank is at 200-230cm3Providing gas at a pressure of 70-100bar at a rate of/s for 1-2 seconds;
a2, continuing to jet air after the pushing warhead is suspended to keep the pressure of the air pushed into the water injection port stable; at the time, the outlet of the gas tank is at 30-50cm3Providing gas at a pressure of 50-100bar at a rate of/s for 1-2 seconds;
a3, a water inlet and a water outlet are communicated with a water storage tank, water is continuously sprayed to a water injection port, and the speed of a material pushing bullet is increased to a process set speed; at the moment, the water outlet of the water storage tank is 50-60cm3Providing water at a pressure of 50-240bar at a speed/s for 0.5-3 seconds;
a4, the water inlet and outlet are continuously communicated with the water storage tank, the water sprayer continuously sprays water, and the pushing bullet is kept to advance at a constant speed at a process set speed; at the moment, the water outlet of the water storage tank is 150cm at the position of 100-3The water with the pressure of 200bar is extracted at the speed of 100/s for 3-5 seconds;
a5, when the pushing warhead reaches the injection molding opening, the water sprayer reduces the water spraying amount and keeps the pressure at the water injection opening constant; at the moment, the water outlet of the water storage tank is positioned at 0-10cm3Extracting water with pressure of 0-50bar at a speed of/s for 0.1-0.3 s;
a6, increasing the water spraying amount by a water sprayer, improving the pressure at the water injection port, and extruding the pushing bullet forward to enable the pushing bullet to be clamped at the injection port; at the moment, the water outlet of the water storage tank is 10-60cm3Water at a pressure of 200 and 220bar was supplied at a speed/s for 1-3 seconds;
and A7, after the water pipe in the die cavity is cooled and formed, the water inlet and the water outlet are communicated with the recovery pool, and water in the first die cavity, the second die cavity and the third die cavity is discharged into the recovery pool.
Partial air is fed into the water injection port in advance through the step A1, so that the pushing bullet suspends in the third die cavity, when the water is sprayed and propelled subsequently, air can be left between water flow and the pushing bullet, the angle of the pushing bullet is convenient to adjust, the turning speed of the pushing bullet is improved in the turning positions of the first die cavity, the second die cavity and the third die cavity, and meanwhile, the damage to the inner wall of the pipe fitting injected and molded at the turning positions is reduced.
The material pushing bullet pushes the molten raw material (plastic particles) forward through the speed of the step A3 to inject the molten raw material into the die cavity, so that the inner wall of the tube wall is smoother.
Through the pressurize process of step A4 for the pipe fitting inner wall in the die cavity keeps stable and makes the inner wall more smooth, improves the density of pipe fitting inner wall simultaneously, increases the quality of pipe fitting.
Further, the material pushing warhead 23 in the step S4 includes: base 231 and body of bullet 232, base 231 is cylindrical structure body of bullet 232 is fixed in base 231 middle part top, body of bullet 232 external diameter is less than base 231 external diameter, body of bullet 232 top is conical structure body of bullet 232 lower part is cylindrical structure, base 231 external diameter is greater than the mouth 122 internal diameter of moulding plastics, base 231 and spacing groove 214 clearance fit. The pushing bullet is clamped at the injection molding opening, so that water in the mold cavity is prevented from entering the injection molding machine in the water injection process.
Furthermore, a boosting groove 233 is formed below the base 23. The thrust can be enhanced by the arrangement of the boosting groove 233, and the stabilizing effect of the pushing warhead in the pushing process is improved.
Further, the third cavity 131 is provided with a first corner 133 at an upper portion thereof. The opening of the third die cavity is vertically arranged downwards through the arrangement of the first corner, so that the vertical arrangement of the water sprayer is facilitated, and the stability in the water spraying process is improved.
Further, a second corner 123 is arranged at a connection part of the first mold cavity 121 and the injection port. The injection molding opening is vertically arranged upwards through the arrangement of the second corner, so that the vertical arrangement of the injection molding machine is facilitated, and the stability in the injection molding process is improved.
Furthermore, the water quality requirement of the water in the water storage tank 8 is as follows:
the pH value is 6-9;
the chloride content is not higher than 1000 mg/l;
the content of sulfate is not higher than 70-300 mg/l;
the nitrate content is not higher than 100 mg/l;
the content of corrosive carbonic acid is not higher than 20-50 mg/l;
the oxygen content is not higher than 2 mg/l;
the content of ammonium is not higher than 2-20 mg/l;
the iron content is not higher than 10 mg/l;
the manganese content is not higher than 1 mg/l;
the free chloride is not higher than 5 mg/l.
The product impurities in the die cavity can be reduced through the water quality requirement of the water storage tank, and the smoothness of the inner wall surface of the product is improved.
When the injection molding machine works, raw materials (plastic particles) in a molten state are injected into the die cavity by the injection molding machine, on the premise that a product is not completely cooled, high-pressure air and water are sequentially injected into the product by the aid of the water auxiliary module according to the steps S1-S6 to push the pushing warhead on the water injection port, the pushing warhead sequentially penetrates through the third die cavity, the plurality of groups of second die cavities and the first die cavity to push redundant raw materials back to the injection molding machine, the hollow effect of the product is finally achieved, the pushing warhead is remained in the first die cavity, the product is taken out after demolding, waste materials in the third die cavity and the first die cavity are cut off, a new pushing warhead is installed on the water injection port by the aid of a manipulator, and the warhead in the waste materials in the first die cavity can be cleaned and recycled. Compared with the traditional water-assisted injection molding method which directly pushes the raw material through water flow, the method can greatly improve the uniformity of the inner wall of a product by pushing the solid material pushing bullet, and can reduce the wall thickness, reduce the material consumption of a pipe fitting and reduce the production cost.
The invention discloses an injection molding process of a slender water pipe, which improves the uniformity of the wall of an injection molded pipe by placing a material pushing bullet on a water injection port, and can reduce the wall thickness of the pipe wall and reduce the material consumption of a pipe fitting. Meanwhile, water in a mold cavity can be effectively prevented from entering the injection molding machine in the water injection process, the dilution of raw materials is reduced, and the damage to the injection molding machine is prevented.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many variations or modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.

Claims (9)

1. An injection molding process for a slender water pipe is characterized by sequentially comprising the following steps of:
s1, placing the pushing bullet into a water injection connector on the water auxiliary equipment by an external manipulator;
s2, closing the die assembly above the water auxiliary equipment;
s3, performing injection molding on the mold by an injection molding machine above the mold component;
s4, spraying water to a die cavity in the die assembly by using water auxiliary equipment to push the material pushing bullet to move in the die cavity;
s5, opening the mold after the mold assembly is cooled, and taking out the water pipe in the mold cavity by an external manipulator;
and S6, cleaning waste materials at the upper end and the lower end of the water pipe, and simultaneously taking out the pushing bullet.
2. An injection molding process for an elongated water pipe according to claim 1, wherein the mold assembly of step S2 comprises: the water pipe mould that opens and shuts about a plurality of groups to adjacent two sets of water pipe mould is spliced from top to bottom sealedly, the water pipe mould top that is located the superiors is provided with the guide mould that opens and shuts about can controlling, the water pipe mould below that is located the lower floor is provided with the regulation mould that opens and shuts about can, guide mould middle part is provided with first die cavity, the middle part of every water pipe mould of group is provided with the second die cavity, it is provided with the third die cavity to adjust the mould middle part, first die cavity, second die cavity and third die cavity establish ties the intercommunication each other, first die cavity top is provided with the mouth of moulding plastics, adjust the mould lower terminal surface be provided with the opening and communicate with the third die cavity.
3. An injection molding process for an elongated water pipe according to claim 1, wherein the water assist device of step S1 comprises: the sprinkler, the sprinkler below is provided with the inlet outlet, the sprinkler up end links to each other and seals with the adjusting die lower terminal surface, sprinkler top middle part is provided with the guiding gutter, the guiding gutter internal diameter is greater than the opening internal diameter, the guiding gutter middle part is provided with the water injection connector, water injection connector external diameter is less than the opening internal diameter, water injection connector up end and sprinkler up end parallel and level, the water filling port has been seted up at water injection connector middle part, water filling port upper portion is provided with the spacing groove, the water filling port sets up with the opening is coaxial with the adjusting die, the water filling port passes through the pipeline and links to each other with the inlet outlet of sprinkler below.
4. An injection molding process for an elongated water pipe according to claim 1, wherein said step S4 is composed of the following steps:
a1, a water inlet and a water outlet are communicated with a gas tank, air is sprayed into the third die cavity, and a material pushing bullet is suspended above a water injection port;
a2, continuing to jet air after the pushing warhead is suspended to keep the pressure of the air pushed into the water injection port stable;
a3, a water inlet and a water outlet are communicated with a water storage tank, water is continuously sprayed to a water injection port, and the speed of a material pushing bullet is increased to a process set speed;
a4, the water inlet and outlet are continuously communicated with the water storage tank, the water sprayer continuously sprays water, and the pushing bullet is kept to advance at a constant speed at a process set speed;
a5, when the pushing warhead reaches the injection molding opening, the water sprayer reduces the water spraying amount and keeps the pressure at the water injection opening constant;
a6, increasing the water spraying amount by a water sprayer, improving the pressure at the water injection port, and extruding the pushing bullet forward to enable the pushing bullet to be clamped at the injection port;
and A7, after the water pipe in the die cavity is cooled and formed, the water inlet and the water outlet are communicated with the recovery pool, and water in the first die cavity, the second die cavity and the third die cavity is discharged into the recovery pool.
5. The elongated water pipe injection molding process according to claim 1, wherein the material pushing bullet in step S4 comprises: the base is of a cylindrical structure, the bullet body is fixed above the middle of the base, the outer diameter of the bullet body is smaller than the outer diameter of the base, the top of the bullet body is of a conical structure, the lower part of the bullet body is of a cylindrical structure, the outer diameter of the base is larger than the inner diameter of an injection molding opening, and the base is in clearance fit with a limiting groove.
6. The injection molding process of claim 5, wherein a boosting groove is formed below the base.
7. An injection molding process for an elongated water tube according to claim 1, wherein: and a first corner is arranged at the upper part of the third die cavity.
8. An injection molding process for an elongated water tube according to claim 1, wherein: and a second corner is arranged at the connecting part of the first mold cavity and the injection molding opening.
9. The injection molding process of the slender water pipe according to claim 4, wherein the water quality requirement of the water in the water storage tank is as follows:
the pH value is 6-9;
the chloride content is not higher than 1000 mg/l;
the content of sulfate is not higher than 70-300 mg/l;
the nitrate content is not higher than 100 mg/l;
the content of corrosive carbonic acid is not higher than 20-50 mg/l;
the oxygen content is not higher than 2 mg/l;
the content of ammonium is not higher than 2-20 mg/l;
the iron content is not higher than 10 mg/l;
the manganese content is not higher than 1 mg/l;
the free chloride is not higher than 5 mg/l.
CN202110439457.2A 2021-04-23 2021-04-23 Injection molding process for slender water pipe Active CN113263685B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110439457.2A CN113263685B (en) 2021-04-23 2021-04-23 Injection molding process for slender water pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110439457.2A CN113263685B (en) 2021-04-23 2021-04-23 Injection molding process for slender water pipe

Publications (2)

Publication Number Publication Date
CN113263685A true CN113263685A (en) 2021-08-17
CN113263685B CN113263685B (en) 2023-03-14

Family

ID=77229184

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110439457.2A Active CN113263685B (en) 2021-04-23 2021-04-23 Injection molding process for slender water pipe

Country Status (1)

Country Link
CN (1) CN113263685B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006213041A (en) * 2005-02-07 2006-08-17 Shisuko:Kk Heating-cooling system of mold and mold apparatus for hollow injection molded product
CN102990881A (en) * 2012-12-12 2013-03-27 江阴标榜汽车部件有限公司 Water-assisted injection molding process method
CN103407087A (en) * 2013-08-26 2013-11-27 华东交通大学 Water-assisted (co-injection) injection mold for complex-formed tube and stick plastic parts
CN205497945U (en) * 2016-01-29 2016-08-24 浙江中亚实业有限公司 Injection moulding mould is assisted to automobile cooling water pipe gas
CN112339223A (en) * 2020-11-18 2021-02-09 华东交通大学 Gas injection-water injection device for gas-water auxiliary injection molding process

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006213041A (en) * 2005-02-07 2006-08-17 Shisuko:Kk Heating-cooling system of mold and mold apparatus for hollow injection molded product
CN102990881A (en) * 2012-12-12 2013-03-27 江阴标榜汽车部件有限公司 Water-assisted injection molding process method
CN103407087A (en) * 2013-08-26 2013-11-27 华东交通大学 Water-assisted (co-injection) injection mold for complex-formed tube and stick plastic parts
CN205497945U (en) * 2016-01-29 2016-08-24 浙江中亚实业有限公司 Injection moulding mould is assisted to automobile cooling water pipe gas
CN112339223A (en) * 2020-11-18 2021-02-09 华东交通大学 Gas injection-water injection device for gas-water auxiliary injection molding process

Also Published As

Publication number Publication date
CN113263685B (en) 2023-03-14

Similar Documents

Publication Publication Date Title
CN102285060B (en) Water-assisted molding process and constant pressure water-assisted injection molding equipment
AU660434B2 (en) Method for the use of gas assistance in the molding of plastic articles to enhance surface quality
CN105414491A (en) Molding machine without sand filling dead angles and application method thereof
CN105729716A (en) Multipoint nitrogen charging injection molding technology
CN113263685B (en) Injection molding process for slender water pipe
CN109624202B (en) Gas-assisted injection molding method for automobile roof handle
CN207327488U (en) A kind of efficient injection mold of central feeding
CN103128929A (en) Horn molding automobile door plate type injection mold with exhaust structure
CN205167480U (en) Controllable injection mold of pressure
CN216152898U (en) Injection molding equipment for slender water pipe
CN103009607B (en) Apparatus and method for molding plastic liner with double head openings
CN104589581A (en) Fluid injection device for injection molding
CN204487939U (en) A kind of use in injection molding fluid discharging apparatus
CN101612797A (en) A kind of hollow resin goods and mold shaping method
CN211640743U (en) Water-assisted injection molding device for automobile luggage rack
CN1080640C (en) Gas-injection mould apparatus for gas-aid ejection moulding apparatus and gas-injection apparatus thereof
CN210590311U (en) Injection mold with blow water installation
CN1310664A (en) The apparatus of injection molding rubber and plastic and the method thereof
CN201516683U (en) Apparatus for directly cooling molding segment modules through high-pressure nozzle atomizing and cooling
CN215151201U (en) Injection mold with blow water installation
CN220841227U (en) Needle valve type injection mold structure
CN209320157U (en) A kind of gas-assisted forming mold of no flash
CN218985525U (en) Anti-blocking injection nozzle
CN216708170U (en) Injection mold for decorative ring of automobile double-color air outlet
CN2664886Y (en) Two-color alternate jetting structure of jet machine

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant