CN206825795U - A kind of pressure injection-moulded shaped device of plastic pipe - Google Patents

Abstract

It the utility model is related to injection moulding device technical field,More particularly to a kind of pressure injection-moulded shaped device of plastic pipe,The precision that the plastic uses is 5 grades,And need three-dimensional side core-pulling,Core-pulling mechanism is more complicated,In view of production efficiency,It is adopted as the cavity configuration form of a mould two,Mould structure design is reasonable,Using the motor-driven core-pulling mechanism of Angle Pin sliding block,Heat treatment hardness HRC >=55,Surface roughness Ra≤0.8 μm,Angle Pin fixed part and the interference fits that the fit precision of template is H7/m6,22 degree of the inclination angle of Angle Pin,Easy to manufacture and cost is low,Automation mechanized operation is high,It is easy to maintenance and meet accessory size and appearance requirement,Tee pipe coupling minimum wall thickness (MINI W.) 2mm meets the requirements,Plastic surface immaculate,Striped,Indenture,Foaming,The defects of discoloration,Existing plastic pipe is solved when producing in enormous quantities,Precision and size is uncontrollable and surface major defect,The problem of mould high processing costs and later period maintenance inconvenience.

Description

A kind of pressure injection-moulded shaped device of plastic pipe

Technical field

It the utility model is related to injection moulding device technical field, and in particular to a kind of pressure injection-moulded shaping dress of plastic pipe Put.

Background technology

Pipe fitting is the part that pipe is connected into pipeline, can be divided into socket fitting, bent bullet duplex melting tube according to connection method Part, threaded fitting, flanged fitting and weld-end fittings.It is multi-purpose to be made with pipe identical material, have elbow (ell), three-way pipe, Four-way pipe (crosshead) and reduced pipe (concentric reducer) etc..Elbow is used for the place of pipeline turning；Three-way pipe is used for three pipes and converged The place of collection；Four-way pipe is used for the place that four pipes collect；Reduced pipe is used for the ground that the two tubes of different tube diameters are connected Side.

In recent years, with the rapid development of China's economy, plastics processing machinery and mould development are very rapid, high Effect, automation is large-scale, miniature, accurate, and the ratio that the mould of high life is shared in whole die industry is increasing.China Large-scale, complicated, accurate, efficient and long-service die steps on a new stage again, and many types of molds can substitute gate-in mold system, Mould CAD/CAM technologies have obtained very fast popularization and application and have achieved good result, and Fast Forming Technique and equipment have Tremendous development simultaneously has started to be taken seriously and started to answer into the manufacturing technology of new generation such as practical popularization stage, High Speed Milling Operation With.Used from mould for angle, it is desirable to which efficiently, automation is easy to operate；From Making mold angle, it is desirable to rational in infrastructure, system Make easily, low cost.In modern plastics production of articles, rational processing technology, efficient equipment, advanced mould is must can not Three few key factors.For mould compared with other engineering goods, an important feature is exactly with high content of technology, net output proportion Greatly.With chemical industry, the fast development of light industry industry, the mould industry in China is in recent years always with annual 13%-15%'s or so Growth rate high speed development, and requirement of the every profession and trade to mould also more and more higher.Change in face of market, there is high technology content Mould just commercially show up prominently.With industrial development, kind, the quantity of industrial products are more and more；To product quality It is even more increasingly exquisite, magnificent with the requirement of outward appearance.Therefore, with reference to Chinese concrete condition, the construction of learning overseas mould industry and mould Have the experience of production, publicity, the mould production for carrying out scientific rationalization, the progress of Tool and Die Technology could be promoted.

Injection molding is the most important processing method of thermoplastic product.With the plastic part of the method machine-shaping, As many as its kind and pattern are that other forming methods are unrivaled.The process of rising is by the thrust with screw rod, by what is plastified In the mold cavity of plastic melt injection closure, molded after cooling and solidifying is shaped and obtain plastic.Therefore, injection molding is formed Three necessary conditions：First, plastic must enter die cavity with molten condition；Second, plastic solution must have enough pressure and Flow velocity, to ensure timely to be full of each corner of whole die cavity；Meet product shape and size third, need to have and meet to be molded The mould of the requirement of technique.

Injection molding technology has its unique advantage compared with other forming techniques, shows the following aspects：Its First, the fusion plastification of molding materials and flowing moulding are to be carried out at plastic barrel and die cavity two respectively, mould can be located all the time Then solution condenses or the state of crosslinking curing quickly, so as to be advantageous to shorten molding cycle；The second is first locking die is then Just plastic solution is injected, abrasion very little of the solution in addition with good mobility to die cavity, thus a cover die can be used Tool high-volume shaping complex parts, surfacial pattern and the product that mark is clear and dimensional accuracy is higher；The third is forming process Whole forming operations such as matched moulds, charging, plasticizing, injection, Qi Mo and ejection product are automatically performed by injection machine, so that injection Technique is easily full-automatic and realizes programme-control.But we will also see the weak point of injection molding, due to cooling condition Limitation, it is difficult to the change larger thermoplastic articles again of the zero defect of this technology, wall thickness be used, additionally, due to injection The cost of machine and injection mold is very high, and the initial investment of former is larger, so injection molding technology is not suitable for small lot product Production.

Injection molding is also known as injection molding or injection moulding, is a kind of important method of thermoplastic articles shaping.Remove Outside several thermoplastics of only a few, almost all of thermoplastic can be molded plastic with the method.Injection molding can To be molded plastic part that is variously-shaped, meeting numerous requirements.Injection molding successfully applies to some thermosetting plasticses In the industrial production of product, even rubber.

The process of injection molding is that granular or powdered plastic is sent into the barrel of heating from the hopper of injector, heated Molten condition is plastified into, pressure is applied by screw rod (or plunger) and low temperature, closure mould is injected by the nozzle of barrel bottom Have in die cavity, the shape sample for keeping die cavity to be assigned through hardening by cooling, die sinking obtains institute's injection molding plastic, operationally completes A cycle.

PP is crystal type high polymer, and PP is most light in common plasticses, and density is only 0.91g/cm3 (smaller than water).General-purpose plastics In, PP heat resistance is best, and its heat distortion temperature is 80-100 DEG C, can be boiled in boiling water.PP has good stress cracking resistance, There is very high flexible life, be commonly called as " polypropylene (PP) ".PP combination property is expected better than PE.PP products are light, good toughness, resistance toization The property learned is good.The shortcomings that PP：Dimensional accuracy is low, rigidity is insufficient, weatherability is poor, and it has after-contraction phenomenon, after the demoulding, easy to aging, Become fragile, be yielding.Fiberglass reinforced PP is on the basis of original pure PP, glass fibre and other auxiliary agents is added, so as to improve material The use range of material.For in general, most glass fiber reinforced materials are more with the constitutional detail of product, being a kind of structure Engineering material.

Requirement to tee pipe fitting is：Production in enormous quantities ensures that size strictly controls, and wall thickness is internal curved typically in 2-4mm The problem of wall thickness is also needed to be consistent at angle, and plastic outward appearance can not be deformed, shrinkage cavity and depression etc. influence open defect is present, Material requirements is PP, and other sizes need to meet drawing requirement.

Requirement to mould is：It can produce and meet requirement in everyways such as dimensional accuracy, outward appearance, physical properties Public ownership product.The angle used with mould, it is desirable to which high efficiency, automation mechanized operation are easy, from the angle of Making mold, it is desirable to It is rational in infrastructure, easy to manufacture, cost is cheap.

Utility model content

The utility model is in view of the above-mentioned problems of the prior art, provide a kind of plastic pipe pressure injection-moulded shaping dress Put, mould structure design is reasonable, easy to manufacture and cost is low, and automation mechanized operation is high, easy to maintenance and meet accessory size and outer See and require, tee pipe coupling minimum wall thickness (MINI W.) 3mm meets the requirements, and plastic surface immaculate, striped, indenture, foaming, discoloration etc. lack Falling into, solve existing plastic pipe when producing in enormous quantities, precision and size is uncontrollable and surface major defect, scrappage is high, The problem of mould high processing costs and later period maintenance inconvenience.

To achieve the above object, the utility model is achieved using following technical scheme：

A kind of pressure injection-moulded shaped device of plastic pipe, it is characterised in that：Top clamping plate 1 and cover half fixed plate 2 pass through side Pin 2 18, M12 screws 19 and the M14 screws 30 and pin 3 31 in face are fixed together with latch segment 20, in top clamping plate 1 Center is provided with centring ring 6, at the center feeding mouth of centring ring 6 inside through cover half fixed plate 2 be provided with sprue bush 9, pouring The side of muzzle 9 is respectively equipped with insert 13 and side core 14 and sliding block 15, and cover half fixed plate 2 is fixed with guide pillar 4 inside side, Guide pin bushing 1 is fixed with inside the side of moving platen 3, guide pillar 4 and guide pin bushing 1 are slidably matched, relative in guide pillar 4 and guide pin bushing 1 Side, be provided with taper pin 17 with 22 degree on top clamping plate 1, taper pin 17 passes through cover half fixed plate 2 and moving platen 3 and support plate 12, The cavity positions of face part below sprue bush 9, it is being fixed with below the die cavity of part inside moving platen 3 by pin 4 33 Mold insert 11, set in the side of mold insert 11 against the edge of the moving platen 3 of taper pin 17 and lock is provided with by the latch 21 with little spring Tight block 20, the bottom of moving platen 3 are provided with support plate 12, and support plate 12 is solid by symmetrical cushion block 25 and Bottom clamp plate 29 It is fixed, the push pedal 27 with limited post 28 and ejector pin retaining plate 26, sprue puller 10 and the push rod with spring are provided between two cushion blocks 25 23 and push pedal guide pillar 8 reached through ejector pin retaining plate 26 and support plate 12 and mold insert 11 in the die cavity of part, on support plate 12 The side of sprue puller 10 is additionally provided with release link 7 and the push pedal guide pillar 8 with spring 37, and push pedal 27 and ejector pin retaining plate 26 are by M16 spiral shells Nail 36 is fixed together and is additionally provided with guide pin bushing 2 24, and push pedal guide pillar 8 and guide pin bushing 2 24 are slidably matched, in cover half fixed plate 2 With the internal openings of insert 13 have vertically through water channel and water nozzle 32, water nozzle 32 is built-in with water plug 35 and inserts 34.

Compared with prior art, the beneficial effects of the utility model are：

Plastic surface quality includes immaculate, striped, indenture, foaming, the defects of discoloration, also lustrous surface and table Surface roughness.Surface defect must avoid；Lustrous surface and surface roughness should be depending on plastic requirements.Except Avoid from technique during shaping outside the faults such as cold shut, ripple, mainly determined by the surface roughness of mould molding part as far as possible. The surface roughness one-level higher than the surface roughness of plastic of general mould.The plastic requires good appearance, bright in colour, appearance Trace is speckless and welds, roughness can use Ra0.8um, and without higher surface roughness requirements inside plastic.

The precision that the plastic uses is 5 grades, to produce in enormous quantities, and needs three-dimensional side core-pulling, and core-pulling mechanism is more complicated, In view of production efficiency, the cavity configuration form of a mould two is adopted as.

Sprue sprue bush is designed to an entirety with centring ring, but considers that above-mentioned factor generally is still separated to set Meter, in order to dismounting and change.Also allow for from high-quality steel individually process and be heat-treated simultaneously.Here T8A is used, is quenched Heat treatment hardness is HRC53, because production batch is larger, to improve efficiency, therefore uses the motor-driven core-pulling mechanism of Angle Pin sliding block.Machine Dynamic undercut and mould opening force during core pulling using injector, change the direction of motion, by lateral active type by transmission mechanism Core is extracted out.The structure of motor-driven core-pulling mechanism is more complicated, but core pulling does not need manual operation, and Core-pulling force is big, has flexible, side Just, production efficiency is high, easily realizes full automatic working, without the advantages that adding equipment in addition.To improve efficiency, here using oblique The motor-driven core-pulling mechanism of guide pillar sliding block, Angle Pin make Carburization Treatment, heat treatment hardness HRC >=55, surface roughness Ra using 20 steel ≤ 0.8 μm, the fit precision of Angle Pin fixed part and template is H7/m6 interference fits, 22 degree of the inclination angle of Angle Pin, this Design uses combined type, and sliding block material is generally manufactured with 45 steel or T10, T8, is hardened to more than 45HRC, is taken T8 in the design To manufacture.

Brief description of the drawings

Fig. 1 is the utility model positive structure diagram.

Fig. 2 is the utility model overlooking the structure diagram.

Fig. 3 is the utility model injection-moulded plastic part structure chart.

Shown in figure：Top clamping plate 1, cover half fixed plate 2, moving platen 3, guide pillar 4, guide pin bushing 1, centring ring 6, release link 7, Push pedal guide pillar 8, sprue bush 9, sprue puller 10, mold insert 11, support plate 12, insert 13, side core 14, sliding block 15, pin 1, tiltedly Pin 17, pin 2 18, M12 screws 19, latch segment 20, latch 21, spring 22, push rod 23, guide pin bushing 2 24, cushion block 25, push rod Fixed plate 26, push pedal 27, limited post 28, Bottom clamp plate 29, M14 screws 30, pin 3 31, water nozzle 32, pin 4 33, inserts 34th, water plug 35, M16 screws 36, spring 37.

Embodiment

Structure of the present utility model and its advantage are further illustrated below in conjunction with accompanying drawing：

Embodiment：As shown in Figure 1.

For the wall thickness of thermoplasticity plastic typically in 1-4mm, the wall thickness of same plastic should be as consistent as possible, if wall thickness is excessive, Plastic can be deformed because of cooling or curing rate is different produces stress, shrinkage cavity and the defects of depression, while be not easy to cold But.《Plastics molding process and mold design》In, recommend PP product flows in thermoplasticity plastic minimum wall thickness (MINI W.) and recommendation wall thickness table 50mm minimum wall thickness (MINI W.) 0.85mm, tee pipe coupling minimum wall thickness (MINI W.) 2mm meet the requirements, can injection molding.

Plastic surface quality requirements, the defects of immaculate, striped, indenture, foaming, discoloration, also lustrous surface and table Surface roughness, surface defect must avoid, and the plastic requires good appearance, bright in colour, and appearance is speckless and welded trace, slightly Rugosity can use Ra0.8um, and without higher surface roughness requirements inside plastic.Can be seen that the plastic from plastic figure is Three-way pipe, and global shape is convex shape, each size and shape is all as shown in part drawing.Therefore it is that must take into consideration in design mould Its at least one or more than two thorough core-pulling mechanisms.

It is as follows according to requirements above and condition, mould structure design：

The pin two that a kind of pressure injection-moulded shaped device of plastic pipe, top clamping plate 1 and cover half fixed plate 2 pass through side 18th, M12 screws 19 and M14 screws 30 and pin 3 31 are fixed together with latch segment 20, in the center of top clamping plate 1 Provided with centring ring 6, at the center feeding mouth of centring ring 6 inside through cover half fixed plate 2 be provided with sprue bush 9, the one of sprue bush 9 Side is respectively equipped with insert 13 and side core 14 and sliding block 15, and guide pillar 4, moving platen 3 one are fixed with inside the side of cover half fixed plate 2 Guide pin bushing 1 is fixed with inside side, guide pillar 4 and guide pin bushing 1 are slidably matched, fixed in the relative side of guide pillar 4 and guide pin bushing 1 Taper pin 17 is provided with 22 degree on die holder plate 1, taper pin 17 passes through cover half fixed plate 2 and moving platen 3 and support plate 12, in sprue bush 9 The cavity positions of lower section face part, mold insert 11 is being fixed with by pin 4 33 inside moving platen 3 below the die cavity of part, The side of mold insert 11 sets against the edge of the moving platen 3 of taper pin 17 and is provided with latch segment 20 by the latch 21 with little spring, moves The bottom of template 3 is provided with support plate 12, and support plate 12 is fixed by symmetrical cushion block 25 with Bottom clamp plate 29, two cushion blocks The push pedal 27 with limited post 28 and ejector pin retaining plate 26, sprue puller 10 and push rod 23 and push pedal guide pillar with spring are provided between 25 8 reach in the die cavity of part through ejector pin retaining plate 26 and support plate 12 and mold insert 11, the one of sprue puller 10 on support plate 12 Side is additionally provided with release link 7 and the push pedal guide pillar 8 with spring 37, and push pedal 27 and ejector pin retaining plate 26 are fixed on one by M16 screws 36 Rise and be additionally provided with guide pin bushing 2 24, push pedal guide pillar 8 and guide pin bushing 2 24 are slidably matched, inside cover half fixed plate 2 and insert 13 Perforate have vertically through water channel and water nozzle 32, water nozzle 32 is built-in with water plug 35 and inserts 34.

Claims (1)

1. A kind of 1. pressure injection-moulded shaped device of plastic pipe, it is characterised in that：Top clamping plate (1) and cover half fixed plate (2) pass through Pin two (18), M12 screws (19) and the M14 screws (30) and pin three (31) of side are fixed together with latch segment (20), Centring ring (6) is provided with the center of top clamping plate (1), inside is fixed through cover half at the feeding mouth of centring ring (6) center Plate (2) is provided with sprue bush (9), and insert (13) and side core (14) and sliding block (15) are respectively equipped with the side of sprue bush (9), fixed Guide pillar (4) is fixed with inside mould fixed plate (2) side, guide pin bushing one (5), guide pillar (4) are fixed with inside moving platen (3) side It is slidably matched with guide pin bushing one (5), in the relative side of guide pillar (4) and guide pin bushing one (5), top clamping plate is provided with (1) with 22 degree Taper pin (17), taper pin (17) pass through cover half fixed plate (2) and moving platen (3) and support plate (12), the face below sprue bush (9) The cavity positions of part, moving platen (3) is internal below the die cavity of part is fixed with mold insert (11) by pin four (33), is inlaying The side of part (11) is provided with latch segment against the edge of the moving platen (3) of taper pin (17) by the latch (21) with little spring (20), the bottom of moving platen (3) is provided with support plate (12), and support plate (12) passes through symmetrical cushion block (25) and Bottom clamp plate (29) it is fixed, it is provided with the push pedal (27) with limited post (28) and ejector pin retaining plate (26), sprue puller between two cushion blocks (25) (10) arrived with the push rod with spring (23) and push pedal guide pillar (8) through ejector pin retaining plate (26) and support plate (12) and mold insert (11) Up in the die cavity of part, the side of sprue puller (10) is additionally provided with release link (7) and pushing away with spring (37) on support plate (12) Plate guide pillar (8), push pedal (27) and ejector pin retaining plate (26) are fixed together by M16 screws (36) and are additionally provided with guide pin bushing two (24), push pedal guide pillar (8) and guide pin bushing two (24) are slidably matched, and have in cover half fixed plate (2) and insert (13) internal openings vertical The water channel and water nozzle (32) directly penetrated, water nozzle (32) are built-in with water plug (35) and inserts (34).