CN112297383A - Hollow pipe injection molding equipment with wide application range - Google Patents
Hollow pipe injection molding equipment with wide application range Download PDFInfo
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- CN112297383A CN112297383A CN202010894319.9A CN202010894319A CN112297383A CN 112297383 A CN112297383 A CN 112297383A CN 202010894319 A CN202010894319 A CN 202010894319A CN 112297383 A CN112297383 A CN 112297383A
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 100
- 238000005520 cutting process Methods 0.000 claims abstract description 33
- 238000002347 injection Methods 0.000 claims abstract description 21
- 239000007924 injection Substances 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 238000007493 shaping process Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 32
- 238000004519 manufacturing process Methods 0.000 abstract description 25
- 238000000465 moulding Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
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- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
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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
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses hollow pipe fitting injection molding equipment with a wide application range, and belongs to the field of injection molding equipment. The device comprises an injection molding machine, a cooling and shaping unit, a traction unit and a cutting unit; be equipped with injection mold on the injection molding machine, it includes: die sleeve; the taper angle hole section is arranged in the middle of one end face of the die sleeve along the axial direction of the die sleeve; the diameter bearing hole piece is hollow and columnar, a mounting hole is formed in the middle of the other end face of the die sleeve, the diameter bearing hole piece is detachably mounted in the mounting hole, and the hollow part of the diameter bearing hole piece is a straight hole and is communicated with the taper angle hole section; the mold core is connected with the mold sleeve and comprises a conical section which is arranged in the conical angle hole section; and one end of the core section is connected with the conical section, and the other end of the core section penetrates through the diameter bearing hole piece and extends out of the die sleeve. The equipment can be used for production by replacing the bore hole piece according to the requirements of different hollow pipe product shapes, greatly saves the time consumed by mounting and dismounting the injection mold, saves the production cost of the equipment, and has the characteristics of high production efficiency and high product quality.
Description
Technical Field
The invention belongs to the technology of injection molding equipment, and particularly relates to hollow pipe fitting injection molding equipment with a wide application range.
Background
Injection molding is a method for producing and molding industrial products, and thermoplastic material flow is molded into a required shape by using different molding dies through an injection molding machine.
When the existing injection molding equipment is used for producing hollow pipe fittings, the quality of products is uneven in level, the density distribution of the pipe fittings is uneven, and when the production demand changes, the original injection molding mold is not suitable any more, the mold is required to be integrally disassembled and replaced, slight changes in the size or the appearance of the product are often only caused when the demand of some demand parties changes the demand of the product, and if the mold is integrally replaced, a new mold is customized, so that the production cost and the equipment cost are both greatly increased.
Through retrieval, the Chinese patent publication number: CN 110696320A; the publication date is as follows: year 2020, month 01, day 17; the utility model discloses a PVC pipe fitting injection molding machine, the on-line screen storage device comprises a base, install drive arrangement on the base, the base top is equipped with feed arrangement, install the controller on the base, the base top is installed and is moulded plastics a heating device, the inside heating screw device that is equipped with of a heating device that extrudes of moulding plastics. Although the injection molding machine of this application has improved production efficiency, can't guarantee the compactness of material flow and the smooth finish on product surface in the production process of moulding plastics, to the change of product size demand, also need whole change to mould plastics and extrude a section of thick bamboo, await improvement.
Disclosure of Invention
In order to solve at least one of the above technical problems, according to an aspect of the present invention, there is provided a hollow pipe injection molding apparatus having a wide application range, the apparatus including:
an injection molding machine that injection molds a material flow for the hollow pipe;
the cooling and shaping unit is arranged on one side of the product outlet of the injection molding machine and used for cooling and shaping the injection molding product;
the traction unit is arranged on one side of the cooling and shaping unit and is used for drawing the cooled and shaped injection molding product;
the cutting unit is arranged on one side of the traction unit and is used for cutting the injection molding product into a specified length;
be equipped with injection mold on the injection molding machine and be used for shaping cavity pipe fitting, injection mold includes:
the die sleeve is in a hollow cylindrical shape;
the taper angle hole section is arranged in the middle of one end face of the die sleeve along the central axis direction of the die sleeve, and the hole diameter is gradually reduced from one end face of the die sleeve to the other end face of the die sleeve;
the diameter bearing hole piece is hollow and columnar, a mounting hole is formed in the middle of the other end face of the die sleeve, the diameter bearing hole piece is detachably mounted in the mounting hole, and the hollow part of the diameter bearing hole piece is a straight hole and communicated with the taper angle hole section; also comprises the following steps of (1) preparing,
a mold core connected with the mold sleeve, and a part of the mold core is arranged in the hollow structure of the mold sleeve, the mold core comprises,
a tapered section disposed in the tapered bore section of the die case;
and one end of the core section is connected with the small-diameter end face of the conical section, and the other end of the core section penetrates through the diameter bearing hole piece of the die sleeve and extends out of the die sleeve.
According to the hollow pipe injection molding equipment with the wide application range, optionally, the cutting unit is connected to the slide way in a sliding mode, the length direction of the slide way is parallel to the moving direction of the injection molding product, the cutting unit moves along the length direction of the slide way through the driving piece during cutting, and the moving speed is the same as the moving speed of the injection molding product.
According to the hollow pipe injection molding equipment with the wide application range, the core section and the conical section of the mold core are optionally detachably connected.
According to the hollow pipe injection molding equipment with wide application range, the distance of the mold core section extending out of the mold sleeve is D, and D is larger than or equal to 1mm and smaller than or equal to 2 mm.
According to the hollow pipe injection molding equipment with the wide application range, the distance between the small-diameter end surface of the conical section and the diameter bearing hole piece is H, and H is larger than or equal to 1.5mm and smaller than or equal to 2.5 mm.
According to the hollow pipe injection molding equipment with the wide application range, the length of the diameter bearing hole piece is L, and L is 1.5-2 times of the outer diameter of the hollow pipe.
According to the hollow pipe injection molding equipment with the wide application range, disclosed by the embodiment of the invention, optionally, the outer cone angle of the mold core is alpha, the inner cone angle of the mold core is beta, and the beta-alpha = 4-9 degrees.
According to the hollow pipe injection molding equipment with the wide application range, provided by the embodiment of the invention, optionally, a thread groove is formed on the hole wall of the taper hole section of the die sleeve along the axial direction of the die sleeve.
According to the hollow pipe injection molding equipment with wide application range, the mold core optionally further comprises:
the outer diameter of the limiting ring is the same as the outer diameter of the end face of the die sleeve, which is provided with the taper angle hole section, and the inner diameter of the limiting ring is the same as the diameter of the large-diameter end part of the taper angle hole section;
the connecting section is positioned in the middle of the limiting ring and is fixedly connected with the limiting ring through a plurality of connecting plates;
one end face of the connecting section is fixedly connected with the large-diameter end face of the conical section.
Advantageous effects
Compared with the prior art, the invention has at least the following beneficial effects:
(1) the hollow pipe fitting injection molding equipment with wide application range can be produced only by replacing the bore hole piece according to the requirements of different hollow pipe fitting product shapes, greatly saves the time consumed by mounting and dismounting the injection mold, saves the production cost of the equipment, and has the characteristics of high production efficiency and high product quality;
(2) according to the hollow pipe injection molding equipment with the wide application range, the cutting unit is connected with the slideway in a matched mode, and the cutting unit can be driven to move along the slideway when cutting is carried out, so that the cutting unit and an injection molding product keep a relatively static state, the normal movement of the injection molding product cannot be influenced when cutting is carried out, the product quality is ensured, and the equipment failure rate is reduced;
(3) according to the hollow pipe fitting injection molding equipment with the wide application range, the material flow can be quickly filled, compacted and quickly molded after entering the injection mold, so that the production efficiency is ensured, and the product quality is also ensured;
(4) according to the hollow pipe injection molding equipment with the wide application range, the core section can be detached and replaced, when the shape and size requirements of the inner hole of the hollow pipe are changed, the mold can adapt to production with new shape requirements by detaching and replacing the core section, and the detachable core section is matched with the detachable diameter-bearing hole piece, so that the equipment has the wider application range;
(5) according to the hollow pipe injection molding equipment with wide application range, the distance D between the core section and the mold sleeve is controlled to be not less than 1mm and not more than 2mm, a certain guiding effect can be achieved on the molded hollow pipe, and the condition that the hollow part is closed and deformed after the pipe extends out can be effectively prevented;
(6) according to the hollow pipe injection molding equipment with wide application range, the distance between the small-diameter end surface of the conical section and the diameter bearing hole piece is controlled to be not less than 1.5mm and not more than 2.5mm, so that the production efficiency of the equipment is improved, and the quality of the outer wall of the hollow pipe is ensured;
(7) according to the hollow pipe injection molding equipment with the wide application range, the length L of the bore hole piece is controlled to be 1.5-2 times of the outer diameter of the hollow pipe, so that the production efficiency, the product uniformity and the overall compactness of the equipment are ensured;
(8) the hollow pipe injection molding equipment with wide application range controls the angle difference beta-alpha = 4-9 degrees, ensures that the pressure can enable the product to be compact and uniform, has small resistance and ensures the production efficiency;
(9) according to the hollow pipe injection molding equipment with the wide application range, the thread groove plays a role in guiding material flows injected into the mold sleeve and the mold core, the material flows in the channel can be uniformly mixed, the material flows uniformly enter the channel in the circumferential direction when the material flows in the channel at the diameter bearing hole, and the uniformity of the product density is further ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, and it is apparent that the drawings in the following description only relate to some embodiments of the present invention and are not limiting on the present invention.
FIG. 1 is a half sectional view of an injection mold of the present invention;
FIG. 2 is a half cross-sectional view of a mold core of the injection mold of the present invention;
FIG. 3 is a schematic view of a core end face of the injection mold of the present invention;
FIG. 4 is a half sectional view of a mold shell of the injection mold of the present invention;
FIG. 5 is a schematic view of an end face of a mold sleeve of the injection mold of the present invention;
FIG. 6 is a half sectional view of a die case according to example 8;
FIG. 7 is a schematic view of a hollow pipe injection molding apparatus with a wide application range according to the present invention;
reference numerals:
1. die sleeve; 10. a cone angle bore section; 11. a bore receiving member; 12. a hollow tube outlet; 13. a thread groove;
2. a mold core; 20. a limiting ring; 21. a connecting section; 22. a tapered section; 23. a core segment; 24. a connecting plate;
1000. an injection molding machine; 100. injection molding a mold;
2000. a cooling and shaping unit;
3000. a traction unit;
4000. a cutting unit; 4001. a slideway.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Example 1
The wide hollow pipe fitting injection moulding equipment of application scope of this embodiment includes:
an injection molding machine 1000 that injection molds a material flow for hollow pipe fittings;
a cooling and shaping unit 2000 which is provided at one side of the product outlet of the injection molding machine 1000, and cools and shapes the injection molded product;
a drawing unit 3000, which is provided at one side of the cooling and setting unit 2000, for drawing the cooling and setting injection molding product;
a cutting unit 4000 provided at one side of the drawing unit 3000 to cut the injection-molded product into a designated length;
be equipped with injection mold 100 on injection molding machine 1000 and be used for shaping cavity pipe fitting, injection mold 100 includes:
the die sleeve 1 is in a hollow columnar shape;
the taper angle hole section 10 is arranged in the middle of one end face of the die sleeve 1 along the central axis direction of the die sleeve 1, and the hole diameter is gradually reduced from one end face of the die sleeve 1 to the other end face;
the diameter bearing hole piece 11 is hollow and columnar, a mounting hole is formed in the middle of the other end face of the die sleeve 1, the diameter bearing hole piece 11 is detachably mounted in the mounting hole, and the hollow part of the diameter bearing hole piece 11 is a straight hole and communicated with the taper angle hole section 10; also comprises the following steps of (1) preparing,
a mold core 2 which is connected with the mold sleeve 1 and is partially arranged in the hollow structure of the mold sleeve 1, the mold core 2 comprises,
a tapered section 22 disposed in the tapered bore section 10 of the die case 1;
and the core segment 23 has one end connected with the small-diameter end face of the conical segment 22 and the other end penetrating through the diameter-bearing hole piece 11 of the die sleeve 1 and extending out of the die sleeve 1.
As shown in fig. 7, the injection molding machine 1000 is a main device for producing material flow to mold hollow pipe fittings, the hollow pipe fittings molded by the injection molding machine 1000 extend out and then enter the cooling and molding unit 2000, the injection molding products are completely molded in the cooling and molding unit 2000, the traction unit 3000 assists in pulling the molded injection molding products, the injection molding products which are not completely molded are prevented from being accumulated in the cooling and molding unit 2000 or just after leaving the injection molding machine 1000, so that the production and the product quality are not affected, and the cutting unit 4000 behind the traction unit 3000 cuts the injection molding products into required lengths according to the requirements; the injection molding machine 1000 is provided with an injection mold 100 for molding a desired shape of the hollow pipe.
As shown in fig. 1, the injection mold 100 of the present embodiment forms a channel for injecting plastic between the mold sleeve 1 and the mold core 2 by the cooperation of the mold sleeve 1 and the mold core 2, and the plastic flows through the channel and is then extruded from the hollow pipe outlet 12 of the mold sleeve 1, as shown in fig. 5, thereby obtaining a hollow pipe product, which is convenient and fast.
Wherein, one end face of the die sleeve 1 is provided with a taper angle hole section 10, the other end face is provided with a mounting hole, the mounting hole of the embodiment is a threaded hole, the outer wall of the diameter bearing hole piece 11 is provided with threads which are matched and connected with the mounting hole threads, the middle part of the diameter bearing hole piece 11 is provided with a straight diameter bearing hole along the central axis direction thereof, and the hole is communicated with the taper angle hole section 10; according to the shape requirement of the product, only the bore-bearing hole piece 11 can be replaced, the bore-bearing hole pieces 11 with different inner diameters are installed to produce hollow pipes with different outer diameters, and different shapes of the outer walls of the hollow pipes are obtained through the shapes of the middle holes of the bore-bearing hole pieces 11.
Further, the hollow structure of the mold sleeve 1 of this embodiment includes a taper angle hole section 10 and a diameter bearing hole of a diameter bearing hole part 11, a part of the mold core 2 extending into the hollow part of the mold sleeve 1 includes a taper section 22 and a mold core section 23, after the mold core 2 is installed in cooperation with the mold sleeve 1, an annular long and narrow channel is formed between the taper angle hole section 10 and the taper section 22, the material flow pressure injected into the channel by the injection molding machine 1000 rises, the material flow pressure rises continuously along with the movement of the material flow toward the diameter bearing hole part 11, the material flow density is more uniform and compact, the material flow finally flows into a straight channel formed by the diameter bearing hole of the diameter bearing hole part 11 and the mold core section 23, the material flow in the channel is formed into a hollow pipe shape and is finally extruded from the outlet 12 of the hollow pipe part, the mold core section 23 of this embodiment extends out of the mold sleeve 1, the hollow pipe part extending out of the outlet 12 of the hollow pipe is conveniently guided, the closed deformation of the hollow, further ensuring the product quality.
Example 2
The wide-range hollow pipe injection molding device of this embodiment is further improved on the basis of embodiment 1, the cutting unit 4000 is slidably connected to the slide 4001, the length direction of the slide 4001 is parallel to the moving direction of the injection molding product, and during cutting, the cutting unit 4000 moves along the length direction of the slide 4001 through the driving member, and the moving speed is the same as the moving speed of the injection molding product.
Because the injection molding machine 1000 is in continuous production, the injection molding product continuously moves under the traction of the traction unit 3000, the cutting action of the cutting unit 4000 is perpendicular to the moving direction of the injection molding product, if the cutting unit 4000 directly performs the cutting action, the injection molding product cannot move in the time from the contact of the cutting unit 4000 with the injection molding product to the completion of the cutting, which inevitably affects the action of the traction unit 3000 and the output of the injection molding product, and affects the quality of an unmolded hollow pipe fitting and even causes the failure of injection molding equipment, for this reason, the present embodiment is improved by connecting the cutting unit 4000 to the slideway 4001, driving the cutting unit 4000 to move through a driving member such as a motor, as shown in fig. 7, driving the cutting unit 4000 to synchronously move on the slideway 4001 along the moving direction of the injection molding product at the same speed as the injection molding product, and at this time, the cutting unit 4000 and the injection molding product, the cutting does not influence the normal movement of the injection molding product, ensures the product quality and reduces the equipment failure rate.
Example 3
The wide-range hollow pipe injection molding device of the embodiment is further improved on the basis of the embodiment 2, and the core section 23 of the mold core 2 is detachably connected with the conical section 22.
As shown in FIG. 2, in the present embodiment, a threaded hole is formed in the small-diameter end surface of the tapered section 22, the end of the core section 23 is provided with a matched threaded structure, the core section 23 and the tapered section 22 are detachably connected through the threaded structure, and when the shape and size requirements of the inner hole of the hollow pipe fitting are changed, the core section 23 can be detached and replaced to enable the mold to adapt to the production of new shape requirements.
The removable core segment 23 of this embodiment cooperates with the removable bore hole member 11 to allow the injection molding apparatus of this embodiment to have a wider application range.
Example 4
The wide-range injection molding equipment for the hollow pipe fitting is further improved on the basis of the embodiment 3, the distance that the core segment 23 extends out of the die sleeve 1 is D, and D is larger than or equal to 1mm and smaller than or equal to 2 mm.
As shown in figure 1, the core section 23 extends out of the die sleeve 1 by a proper length, can play a certain guiding role on the hollow pipe produced by molding, and can also effectively prevent the condition that the hollow part is closed and deformed after the pipe extends out, but the distance D overlong that the core section 23 extends out of the die sleeve 1 can lead to the inner wall of the hollow pipe extruded during molding to shrink backwards, so that the product quality is influenced, the due effect cannot be achieved due to too short D, through repeated test analysis, the result is obtained, when the D is not less than 1mm and not more than 2mm, the effect is best.
Example 5
The wide-range hollow pipe injection molding equipment of this embodiment is further improved on the basis of embodiment 4, the distance between the small-diameter end surface of the conical section 22 and the bore-bearing hole piece 11 is H, and H is more than or equal to 1.5mm and less than or equal to 2.5 mm.
As shown in fig. 1, the distance from the small-diameter end surface of the tapered section 22 to the bore-bearing hole 11 is H, the production efficiency of the hollow pipe fitting formed in the production process of the hollow pipe fitting is H, along with the increase of H, the pressure of the material flow to the core section 23 is increased, the flow resistance of the material flow is reduced, the production efficiency of the hollow pipe fitting is improved, but the too large H causes the uniformity and quality of the outer wall surface of the hollow pipe fitting extended out by forming to be poor, along with the reduction of H, the resistance of the material flow is increased, the production efficiency is reduced, the too small H causes unsmooth discharging, the production progress is influenced, and to sum up, H is controlled to be 1.5mm or more and is 2.5mm or less in this embodiment, and the quality of the outer surface.
Example 6
The wide hollow pipe injection molding equipment of application scope of this embodiment is further improved on the basis of embodiment 5, and the length of bearing diameter hole spare 11 is L, and L is 1.5~2 times of hollow pipe external diameter.
As shown in fig. 1, the length of the bore-bearing hole 11 is designed for the size of the outer diameter of the hollow pipe, the length of the bore-bearing hole has great influence on the material flow pressure and the uniformity of the product, too long L can cause too large material flow pressure in the die sleeve 1, the production efficiency is low, the outer surface material flow distribution of the hollow pipe is uneven, too short L can cause poor compactness of the whole product although the production efficiency is high, and through research and analysis, the length L of the bore-bearing hole 11 controlled by the embodiment is 1.5-2 times of the outer diameter of the hollow pipe, so that the production efficiency, the uniformity of the product and the overall compactness of the product of the device are ensured.
Example 7
The wide-range hollow pipe injection molding equipment of this embodiment is further improved on the basis of embodiment 6, the outer cone angle of the mold core 2 is α, the inner cone angle of the mold sleeve 1 is β, and β - α = 4-9 °.
Fig. 2 and 4 show an outer taper angle α of the mold core 2 and an inner taper angle β of the mold sleeve 1, in this embodiment, the outer taper angle α of the mold core 2 is smaller than the inner taper angle β of the mold sleeve 1, the existence of the angle difference gradually shrinks the cross section of the channel formed by the mold core 2 of the mold sleeve 1, and the pressure applied to the material flow during flowing is gradually increased, so that the material flow in the channel is gradually densified and uniform, the smaller the angle difference is, the smaller the pressure is, the smaller the resistance is, the larger the angle difference is, the larger the pressure is, the resistance is, the angle difference β - α = 4-9 ° is controlled in this embodiment, it is ensured that the product is densified and uniform, the resistance is.
Example 8
The wide-range injection molding equipment for the hollow pipe fitting of the embodiment is further improved on the basis of the embodiment 7, and a thread groove 13 is formed on the hole wall of the taper hole section 10 of the die sleeve 1 along the axial direction of the die sleeve 1.
As shown in fig. 6, the arrangement of the thread groove 13 guides the material flow injected into the die sleeve 1 and the die core 2, and the material flow in the channel can be uniformly mixed, so that when the material flow is in the channel at the position of the bore-bearing hole piece 11, the material flow uniformly enters the channel in the circumferential direction, and the uniformity of the product density is further ensured.
Example 9
The wide hollow pipe fitting injection moulding equipment of application range of this embodiment is further improved on the basis of embodiment 8, and mold core 2 still includes:
the outer diameter of the limiting ring 20 is the same as the outer diameter of the end face, provided with the taper angle hole section 10, of the die sleeve 1, and the inner diameter of the limiting ring is the same as the diameter of the large-diameter end part of the taper angle hole section 10;
the connecting section 21 is positioned in the middle of the limiting ring 20 and is fixedly connected with the limiting ring 20 through a plurality of connecting plates 24;
one end face of the connecting section 21 is fixedly connected with the large-diameter end face of the conical section 22.
As shown in fig. 2 and 3, the limiting ring 20 can abut against the end of the mold sleeve 1, and cooperates with the injection molding machine 1000 to assist in fixing the relative rest position of the mold core 2 and the mold sleeve 1, the material flow of the injection molding machine 1000 is injected from the gap between the limiting ring 20 and the connecting section 21, the connecting plate 24 has a certain flow dividing effect on the material flow, and after the material flow enters the channel formed by the mold sleeve 1 and the mold core 2, the material flow is rapidly mixed and compacted under the action of the angle difference between the thread groove 13 and the conical section 22, and the conical angle hole section 10, and finally is formed and extended through the channel at the diameter bearing hole piece 11.
The examples described herein are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall within the protection scope of the present invention.
Claims (9)
1. An injection molding device for hollow pipe fittings with wide application range comprises,
an injection molding machine that injection molds a material flow for the hollow pipe;
the cooling and shaping unit is arranged on one side of the product outlet of the injection molding machine and used for cooling and shaping the injection molding product;
the traction unit is arranged on one side of the cooling and shaping unit and is used for drawing the cooled and shaped injection molding product;
the cutting unit is arranged on one side of the traction unit and is used for cutting the injection molding product into a specified length;
its characterized in that is equipped with injection mold on the injection molding machine and is used for shaping cavity pipe fitting, and injection mold includes:
the die sleeve is in a hollow cylindrical shape;
the taper angle hole section is arranged in the middle of one end face of the die sleeve along the central axis direction of the die sleeve, and the hole diameter is gradually reduced from one end face of the die sleeve to the other end face of the die sleeve;
the diameter bearing hole piece is hollow and columnar, a mounting hole is formed in the middle of the other end face of the die sleeve, the diameter bearing hole piece is detachably mounted in the mounting hole, and the hollow part of the diameter bearing hole piece is a straight hole and communicated with the taper angle hole section; also comprises the following steps of (1) preparing,
a mold core connected with the mold sleeve, and a part of the mold core is arranged in the hollow structure of the mold sleeve, the mold core comprises,
a tapered section disposed in the tapered bore section of the die case;
and one end of the core section is connected with the small-diameter end face of the conical section, and the other end of the core section penetrates through the diameter bearing hole piece of the die sleeve and extends out of the die sleeve.
2. The wide-application hollow pipe injection molding device of claim 1, characterized in that: cutting unit sliding connection is on the slide, slide length direction is on a parallel with injection moulding product moving direction and sets up, and during the cutting, cutting unit passes through the driving piece and removes along slide length direction, and the translation rate is the same with injection moulding product translation rate.
3. The wide-application hollow pipe injection molding device of claim 2, characterized in that: the core section of the mold core is detachably connected with the conical section.
4. The wide-application hollow pipe injection molding device of claim 3, characterized in that: the distance D that the core section stretches out of the die sleeve is larger than or equal to 1mm and smaller than or equal to 2 mm.
5. The wide-application hollow pipe injection molding device of claim 4, characterized in that: the distance between the small-diameter end surface of the conical section and the diameter bearing hole piece is H, and H is more than or equal to 1.5mm and less than or equal to 2.5 mm.
6. The wide-application hollow pipe injection molding device of claim 5, characterized in that: the length of the diameter bearing hole piece is L, and L is 1.5-2 times of the outer diameter of the hollow pipe fitting.
7. The wide-application hollow pipe injection molding device of claim 6, characterized in that: the outer cone angle of the mold core is alpha, the inner cone angle of the mold core is beta, and beta-alpha = 4-9 degrees.
8. The wide-application hollow pipe injection molding device of claim 7, characterized in that: and a thread groove is formed on the hole wall of the taper hole section of the die sleeve along the axial direction of the die sleeve.
9. The wide-application hollow pipe injection molding device of claim 8, wherein the mold core further comprises:
the outer diameter of the limiting ring is the same as the outer diameter of the end face of the die sleeve, which is provided with the taper angle hole section, and the inner diameter of the limiting ring is the same as the diameter of the large-diameter end part of the taper angle hole section;
the connecting section is positioned in the middle of the limiting ring and is fixedly connected with the limiting ring through a plurality of connecting plates;
one end face of the connecting section is fixedly connected with the large-diameter end face of the conical section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010894319.9A CN112297383A (en) | 2020-08-31 | 2020-08-31 | Hollow pipe injection molding equipment with wide application range |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010894319.9A CN112297383A (en) | 2020-08-31 | 2020-08-31 | Hollow pipe injection molding equipment with wide application range |
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| CN112297383A true CN112297383A (en) | 2021-02-02 |
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