CN208020688U - A kind of high-performance modified PVC profile production side line co-extrusion machine systems of ACM - Google Patents

Abstract

A kind of high-performance modified PVC profile production side line co-extrusion machine systems of ACM; including gravity die material main extruder, hard section bar mold, vacuum cooled forming machine, secondary compound die, flexible glue bar extruder, heat blower, dragger and cutting machine; the gravity die material main extruder is sequentially connected hard section bar mold, vacuum cooled forming machine, secondary compound die, dragger and cutting machine; the secondary compound die also connects flexible glue bar extruder and heat blower simultaneously; the secondary compound die includes preceding extrusion block, squeezes out block, upper extrusion block, workpiece preheating block afterwards.The utility model has the beneficial effects that：One-time formed procedure decomposition is become by two single forming processes using secondary co-extrusion technology, to make forming process be easier to control, the geomery of composite article is more accurate, while the secondary composite mould structure reasonable design, ingenious used, good by proved.

Description

A kind of high-performance modified PVC profile production side line co-extrusion machine systems of ACM

Technical field

The utility model belongs to material forming field more particularly to a kind of high-performance modified PVC profile production side lines of ACM Co-extrusion machine system.

Background technology

In daily life, proximate matter is China maximum field of PVC consumption figures, accounts for about the 25% of PVC aggregate consumptions Left and right is mainly used for making door and window and energy-saving material, its application amount still increases by a fairly big margin in national model circle at present.According to The characterization of polymer brittleness-ductile rupture behavior, PVC are to belong to a kind of fragile material, the poor impact resistance of material itself, Brittleness is big under cryogenic conditions, impact strength is low, and the molecular structure of material itself determines the Some features of itself, to notch Sensibility it is very high, PVC's send the development and application that kind of defect greatly limits PVC.It has to pass through and changes Property mixture, addition anti-impact agent after could be applied.

Common conventional impact modified dose is CPE and anti-impact ACR, CPE tree during PVC profile is formulated at present The glass transition temperature of fat is more than -10 °C, and the shock resistance of PVC product under cryogenic obtained is modified by CPE Performance is also poor, and contains chlorine atom in resin itself, therefore the thermal stability of product is also poor, even if in modifying process Middle addition heat stabilizer can only effectively prevent the dehydrochlorination of PVC from decomposing, but heat stabilizer cannot be with CPE phases It is molten, therefore the decomposition of CPE cannot be prevented, therefore PVC product obtained pole under the action of heat and ultraviolet light is modified by CPE It easily decomposes so that the mechanical properties decrease of product, surface discolouration.It is weather-proof in order to improve the resin modified PVC products of CPE The defects of impact strength is poor under the poor, low temperature of property, researchers have invented acrylic acid lipid modifying agent（Such as ACR）, can A CR as under product cryogenic conditions shock resistance and weatherability all improve significantly, but traditional ACR is modified Easy embrittlement rupture under PVC product room temperature, therefore just property is poor under normal temperature condition.Therefore in order to overcome traditional anti-impact agent gram Take its conventional impact modifying agent answers a little defects to introduce novel anti-impact agent ACM, and ACM is just modified based on existing increasing A kind of new product for the macromolecular grafted polymerization researched and developed on the basis of agent CPE and anti-impact ACR products, ACM is to use propylene Acid esters and the HDPE of slight chlorination aggregate into interpenetrating network copolymer, form new chemical constitution, so generate new property Can, ACM not only can W improve these defects of conventional impact modifying agent and can also generate higher economic effect during changing production Benefit.

ACM high performance modified PVCs, it is also desirable to which coextrusion rubber strip generally uses adhesive tape co-extrusion technology.A traditional co-extrusion Technology is really an once-combined molding technical process, is had from two or more extruders to same molding die extrusion Different rheological behaviours, these melts interior flowing of respective runner in a mold, then converge before outlet mold, then carry out true An empty cooling and shaping.In the process, due to melt viscosity and pressure difference and the differences of flow velocity, when mouth mold is converged, easily Unstable laminar flow is generated, causes compound interface irregular and uneven and depanning segregation phenomenon.In addition, the difference in melt viscosity It can also make melt extrusion when vacuum cooled is shaped, generate sizing difficulty, be easy to block when such as entering shaping cover so that technique mistake Journey is complex and uncontrollable.Therefore, to ensure Forming Quality, it is necessary to manufacture and design complicated mold and skilled operation Technology.

Utility model content

In order to solve the above technical problems, the utility model provides a kind of ACM high-performance modified PVC profile productions side Line co-extrusion machine system.

The utility model is realized in this way：A kind of high-performance modified PVC profile production side line co-extrusion machine systems of ACM, Including:Gravity die material main extruder, hard section bar mold, vacuum cooled forming machine, secondary compound die, flexible glue bar extruder, hot wind hair Raw device, dragger and cutting machine, the gravity die material main extruder are sequentially connected hard section bar mold, vacuum cooled forming machine, two Secondary compound die, dragger and cutting machine, the secondary compound die also connect flexible glue bar extruder and heat blower, institute simultaneously The secondary compound die stated includes preceding extrusion block, squeezes out block, upper extrusion block afterwards, workpiece preheating block, and hot sky is provided on the workpiece preheating block Gas entrance, and being connect with heat blower is provided with positioning screw hole, sets on the rear extrusion block on the upper extrusion block It is equipped with co-extrusion material entrance, and is connect with flexible glue bar extruder, the workpiece preheating block and preceding extrusion block are in the pre-composite position of profile shapes It is machined with strip groove, several bottoming holes are machined in the groove, the bottoming hole is connected to hot air inlet, institute The flexible glue bar extruder setting stated is on mobile open frame.

Preferably, be provided with gradual change booster-type runner on the rear extrusion block, gradual change booster-type runner from co-extrusion Material entrance starts, including several sections are the half round runner for keeping melt pressure to be designed to gradient, and half round runner connects transition Section, the changeover portion are abnormity cutting face, and squeeze out block after running through and extend to adhesive tape extrusion position.

The utility model has the beneficial effects that：One-time formed procedure decomposition is become by two lists using secondary co-extrusion technology One forming process squeezes out PVC hard section bars, after sizing to be cooled, then squeezes out flexible glue bar and be combined into PVC hard section bars first Type.By more melts complicated in one-pass molding are compound become one-pass molding after carry out secondary composite molding again.Each forming process In, mold handles single material, to make recombination process greatly simplify.The compound stage due to melt co-extrusion material melt with Cooling PVC hard section bars are mutually compound, and composite portion is not required to enter shaping cover, and avoiding problems incidental in " preceding co-extrusion " Melt turbulent flow and sizing are difficult, and to make forming process be easier to control, the geomery of composite article is more accurate, while this Extrusion pressure has been effectively ensured using gradual change booster-type runner in the secondary composite mould structure reasonable design, ingenious that utility model uses Power, make the adhesive tape material of melting and PVC profile have it is good cohere, improve the bond strength of adhesive tape；Workpiece preheating block is added, it is right Plastic irregular profile is heated, and the heating time of plastic irregular profile recombination site is extended, and improves the bond strength of adhesive tape, warp It is good to cross proved.

Description of the drawings

Fig. 1 is the general structure schematic diagram of the utility model；

Fig. 2 is the secondary composite mould structure schematic diagram of the utility model；

Fig. 3 is the secondary compound die gradual change booster-type flow passage structure schematic diagram of the utility model；

In figure：1. gravity die material main extruder, 2. hard section bar molds, 3. vacuum cooled forming machines, 4. 2 compound dies, 401. co-extrusion material entrances squeeze out block after 402., block are squeezed out before 403., and block, 405. positioning screws, 406. preheatings are squeezed out on 404. Block, 407. hot air inlets, 4011 half round runner, 4012. changeover portions, 5. flexible glue bar extruders, 6. heat blowers, 7. Dragger, 8. cutting machines, 9. proximate matters, 10. adhesive tape.

Specific implementation mode

In order to be more clearly understood that the technical solution of the utility model, the utility model is made into one below in conjunction with the accompanying drawings Walk explanation.

A kind of high-performance modified PVC profile of ACM as shown in Figure 1 and Figure 2 produces side line co-extrusion machine system, including:Gravity die Material main extruder 1, hard section bar mold 2, vacuum cooled forming machine 3, secondary compound die 4, flexible glue bar extruder 5, heat blower 6, dragger 7 and cutting machine 8, gravity die material main extruder 1 are sequentially connected hard section bar mold 2, vacuum cooled forming machine 3, secondary multiple Flexible glue bar extruder 5 and heat blower 6 are gone back while being connected to molding 4, dragger 7 and cutting machine 8, the secondary compound die 4, The secondary compound die 4 includes preceding extrusion block 403, rear extrusion block 402, upper extrusion block 404, workpiece preheating block 406, the preheating It is provided with hot air inlet 407 on block 406, and is connect with heat blower 6, positioning is provided on the upper extrusion block 404 Screw hole is provided with co-extrusion material entrance 401, and and flexible glue bar on stationary positioned screw 405, the rear extrusion block 402 Extruder 5 connects, and the workpiece preheating block 406 and preceding extrusion block 403 are machined with strip groove in the pre-composite position of profile shapes, described Groove in be machined with several bottoming holes, the bottoming hole is connected to hot air inlet 407, the flexible glue bar extruder On mobile open frame, mobile open frame docks convenient for flexible glue bar extruder 5 and any gravity die material main extruder 1 for 5 settings Using or move away when not used, it is desirable that flexible glue bar extruder 5 moves flexibly, and makes 5 position of flexible glue bar extruder can in terms of multidimensional It adjusts.

As shown in figure 3, be provided with gradual change booster-type runner on the rear extrusion block 402, gradual change booster-type runner Since co-extrusion material entrance 401, including several sections are the half round runner 4011 for keeping melt pressure to be designed to gradient, semicircle Runner 4011 connects changeover portion 4012, and the changeover portion 4012 is abnormity cutting face, and squeezes out block 402 after running through, and is prolonged It extends to adhesive tape and squeezes out position.

When actual production：One-time formed procedure decomposition is become two single forming processes by secondary co-extrusion technology, by one Complicated more melts are compound in secondary molding become one-pass molding after carry out secondary composite molding again.In each forming process, mold Single material is handled, to make recombination process greatly simplify.The compound stage due to melt co-extrusion material melt with it is cooling PVC hard section bars are mutually compound, and composite portion is not required to enter shaping cover, and avoiding problems incidental melt in " preceding co-extrusion " is disorderly Stream and sizing are difficult, and to make forming process be easier to control, the geomery of composite article is more accurate, while this practicality is new The secondary composite mould structure reasonable design, ingenious that type uses, using gradual change booster-type runner, has been effectively ensured extrusion pressure, has made The adhesive tape material and PVC profile of melting have it is good cohere, improve the bond strength of adhesive tape；Workpiece preheating block is added, to plastics Profile shapes is heated, and the heating time of plastic irregular profile recombination site is extended, and the bond strength of adhesive tape is improved, by reality It is good to trample proving effect.For the setting of flexible glue bar extruder on mobile open frame, mobile open frame is convenient for flexible glue bar extruder and appoints The docking of one gravity die material main extruder is used or is moved away when not used, it is desirable that the movement of flexible glue bar extruder is flexible, and in multidimensional side Face keeps flexible glue bar extruder position adjustable.

The above description is only a preferred embodiment of the present invention, therefore all according to described in the utility model patent application range The equivalent change or modification done of structure, feature and principle, be included in the scope of the utility model patent application.

Claims (2)

1. a kind of high-performance modified PVC profiles of ACM produce side line co-extrusion machine system, including:Gravity die material main extruder, gravity die material Mold, vacuum cooled forming machine, secondary compound die, flexible glue bar extruder, heat blower, dragger and cutting machine, feature It is, the gravity die material main extruder is sequentially connected hard section bar mold, vacuum cooled forming machine, secondary compound die, dragger And cutting machine, the secondary compound die also connect flexible glue bar extruder and heat blower, the secondary compound die simultaneously Including preceding extrusion block, block, upper extrusion block are squeezed out afterwards, and workpiece preheating block is provided with hot air inlet, and and hot wind on the workpiece preheating block Generator connects, and positioning screw hole is provided on the upper extrusion block, is provided with co-extrusion material entrance on the rear extrusion block, And connect with flexible glue bar extruder, the workpiece preheating block and preceding extrusion block are machined with strip groove in the pre-composite position of profile shapes, Several bottoming holes are machined in the groove, the bottoming hole is connected to hot air inlet, and the flexible glue bar squeezes out Machine setting is on mobile open frame.

2. the high-performance modified PVC profiles of ACM according to claim 1 produce side line co-extrusion machine system, which is characterized in that Be provided with gradual change booster-type runner on the rear extrusion block, gradual change booster-type runner since co-extrusion material entrance, including Several sections are the half round runner for keeping melt pressure to be designed to gradient, and half round runner connects changeover portion, the changeover portion Block is squeezed out for abnormity cutting face, and after running through extend to adhesive tape squeeze out position.