CN203401719U - Hot air blow molding device - Google Patents

Abstract

A hot air blow molding device can melt plastic materials to fusion materials and then blow the fusion materials into a tubular hollow adhesive film. The hot air blow molding device comprises an extruder and a blow molding unit. The extruder comprises a cavity provided with a mixing chamber, and an extrusion screw enabling the fusion materials to advance in the discharge direction. The blow molding unit comprises a blow molding die holder provided with a die cavity connected with the mixing chamber of the cavity, an air compressor, and an air supply pipe connected between the air compressor and the blow molding die holder. The air supply pipe can improve the temperature of air passing through the air supply pipe by means of the cavity close to the extruder or heating of a blow molding heater, and therefore the phenomenon that the molding quality of the tubular hollow adhesive film is affected because temperature variation is too large in the molding process of the tubular hollow adhesive film can be avoided.

Description

Hot blast blowing device

Technical field

The utility model is about a kind of blowing device, refers to especially a kind of hot blast blowing device of cannulated glued membrane finished product that plastic material is blow molded in blowing mode.

Background technology

In general daily life, many articles for daily use are all to be formed by polymers manufacturing, although yet the various finished products of being made by polymer provide many convenience in life, but early stage polymer mostly cannot be corroded, decompose, therefore the finished product of, being made by polymer such as plastic cement can damage environment.New line along with environmental consciousness, many articles for daily use are replaced by some biodegradable materials gradually in recent years, common PLA (Poly Lactic Acid for example, hereinafter to be referred as PLA plastic cement) be exactly a kind of starch that is taken from plant, environmental protection polymeric material through fermenting, anhydrating and be polymerized, because PLA is can be by biological decomposition after burying, thus friendly for environment, there is the trend that replaces gradually traditional polymer.

And general PLA plastic cement can utilize blowing device to be processed to form a cannulated glued membrane, then need difference according to using, this cannulated glued membrane hot pressing is formed to bag, or directly this glued membrane is furled into reel, to facilitate, transport and following process.Yet the quality of PLA plastic cement is more fragile, the temperature tolerance of product and ductility are all poor, when PLA plastic cement through extruder extruding and when blowing unit is blow molded into cannulated glued membrane, this cannulated glued membrane touches the process of cold air sizing around immediately from the high temperature of melting, this cannulated glued membrane easily produces wrinkle because the temperature difference is too large, therefore although known blowing device can be blow molded into plastic material cannulated glued membrane, but for the material that for example PLA plastic cement etc. quality is more fragile and temperature tolerance is poor, the mass ratio of the finished product that it is made is poor, related, the molding thickness of this cannulated glued membrane is also restricted.

Summary of the invention

The purpose of this utility model is to be applicable to for the higher raw material of processing temperature susceptibility providing a kind of, and can improve the hot blast blowing device of the Forming Quality of cannulated glued membrane.

Hot blast blowing device of the present utility model can melt into plastic material after fused raw material, be blow molded into again a cannulated glued membrane, this hot blast blowing device comprises one, and plastic material is melted is the extruder of fused raw material, and one is blow molded into the blowing unit of cannulated glued membrane by this fused raw material.This extruder comprises that a cavity, with a mixing chamber sends away fused raw material along a progressive extrusion screw rod in discharging side, and at least one is arranged on the extrusion cooker on this cavity, and this blowing unit comprises that one has blowing die holder, an air compressor of a die cavity being connected with the mixing chamber of this cavity, and the ajutage being connected between this air compressor and this blowing die holder, it is characterized in that: the cavity of contiguous this extruder of this ajutage.

Another feature of the utility model hot blast blowing device is: this blowing device also comprises an extruder and a blowing unit, wherein, this blowing unit also comprises that a blowing die holder, an air compressor and connect the ajutage of this blowing die holder and this air compressor, is characterized in that: this blowing unit also comprises a pair of blowing heater heating by the air of this ajutage.

The beneficial effects of the utility model are: utilize the thermal source of this extruder or this blowing heater to by the air heat of this ajutage, can avoid plastic material in the process of blow molding, because of ambient temperature rapid drawdown, affect the Forming Quality of this cannulated glued membrane, can expand the range of application of this blowing device, to make thinner and high-quality cannulated glued membrane simultaneously.

Accompanying drawing explanation

Other feature and effect of the present utility model, will clearly present in the embodiment in reference to accompanying drawing, wherein:

Fig. 1 is the arrangements of components schematic diagram of one first preferred embodiment of the utility model hot blast blowing device;

Fig. 2 is a local schematic top plan view of this first preferred embodiment, and the relativeness of one of this hot blast blowing device extruder and a blowing unit is described; And

Fig. 3 is the local schematic top plan view of a similar Fig. 2, and one second preferred embodiment of the utility model hot blast blowing device is described.

1, cannulated glued membrane, 2, extruder, 21, cavity, 210, chamber wall, 211, mixing chamber, 212, feeding end, 213, discharge end, 22, in-material seat, 24, extrusion screw rod, 25, extrusion cooker, 3, blowing unit, 30, blowing die holder, 301, die cavity, 31, air compressor, 32, ajutage, 321, air intake, 322, outlet air end, 33, blowing heater, 4, draw and get unit, 41, pedestal, 42, draw delivery head, 43, draw and get wheels.

The specific embodiment

Before the utility model is described in detail, should be noted that in the following description content, similarly element is to represent with identical numbering.

As shown in Figures 1 and 2, one first preferred embodiment of the utility model hot blast blowing device can melt plastic material for fused raw material, and reprocessing forms a cannulated glued membrane 1.This hot blast blowing device comprises: one is used for melting the extruder 2 of plastic material, a blowing unit 3 that fused raw material is blow molded into this cannulated glued membrane 1, and one is used for drawing and gets drawing of this cannulated glued membrane 1 and get unit 4.

This extruder 2 comprises: a cavity 21, this cavity 21 has a chamber wall 210 that defines a horizontal mixing chamber 211, this mixing chamber 211 has a feeding end 212, and the discharge end 213 at an interval, and this extruder 2 also comprises that one is arranged on this cavity 21 and from this feeding end 212, raw material is sent into in-material seat in this mixing chamber 211 22, one and is arranged in this mixing chamber 211 and the extrusion screw rod 24 that raw material is squeezed toward this discharge end 213 from this feeding end 212, and several extrusion cooker 25 that is arranged on this cavity 21 and thermal source is provided.Plastic material can be melted by this, and utilize this extrusion screw rod 24 that fused raw material is squeezed toward a discharging direction.

The blowing unit 3 of the present embodiment comprises that a blowing die holder 30, that is arranged on discharge end 213 places of this extruder 2 can produce compressed-air actuated air compressor 31, and an air that this air compressor 31 is produced is sent to the ajutage 32 of this blowing die holder 30.This blowing die holder 30 has a die cavity 301 being communicated with the mixing chamber 211 of this extruder 2, and this ajutage 32 has an air intake 321 being connected with this air compressor 31, and an outlet air end 322 being located in the die cavity 301 of this blowing die holder 30.In order to improve near the environment temperature of contiguous this blowing die holder 30 of this cannulated glued membrane 1, the cavity 21 of these ajutage 32 contiguous these extruders 2, because the extrusion cooker 25 of this extruder 2 can be lasting to these cavity 21 heating, make plastic material can melt and keep suitable high-temperature mobile, therefore, when this ajutage 32 of the present embodiment is close to the cavity 21 of these extruders 2, can, in the situation that not needing extra heat source, the air by this ajutage 32 be heated.

And this draws and gets unit 4 and comprise that a pedestal 41, is erected at and draw delivery head 42 on this pedestal 41, and one draw and get wheels 43, this draws gets unit 4 and can draw the cannulated glued membrane 1 of getting blow molding, and because improvement of the present utility model and this draw, to get unit 4 irrelevant, no longer explanation.

The hot blast blowing device of the present embodiment in use, the extrusion screw rod 24 of this extruder 2 is melt plastic cement raw material continuously, and fused raw material is squeezed toward this discharging direction, its die cavity 301 toward the blowing die holder 30 of this blowing unit 3 is moved, and the air compressor 31 of this blowing unit 3 also can compressed air, and air is delivered in the die cavity 301 of this blowing die holder 30 via this ajutage 32, to the plastic material of melting is blow molded into the film of hollow, be blow molded into this cannulated glued membrane 1.In the process of die cavity 301 of delivering to this blowing die holder 30 by this air compressor 31 due to air, can be by continuing to keep the cavity 21 of the condition of high temperature, therefore be sent to the air of this die cavity 301, can keep high temperature, therefore improve this cannulated glued membrane 1 in blow-moulding process because chilling but produces wrinkle Zhe.Therefore, this first preferred embodiment of the utility model not only can improve the quality of the cannulated glued membrane 1 of moulding, is also applicable to being used in adding man-hour for the high material of temperature susceplibility, can make the cannulated glued membrane 1 that thickness is thinner simultaneously.

As shown in Figure 3, structure and first preferred embodiment of one second preferred embodiment of the utility model hot blast blowing device are similar, difference is: this blowing unit 3 is except comprising: a blowing die holder 30, an air compressor 31 and an ajutage 32, also comprise a pair of blowing heater 33 heating by the air of this ajutage 32.Aforementioned blowing heater 33 can be to by the air heat of this ajutage 32, and because the present embodiment directly provides thermal source to be coated on the blowing heater 33 of these ajutage 32 outsides, therefore the present embodiment is more convenient than the first preferred embodiment in the configuration of element.

Be the design of this first preferred embodiment of the utility model except reaching the object of the Forming Quality that improves this cannulated glued membrane 1, can also directly utilize the thermal source of this extruder 2, to reach the object of saving the energy.And this second preferred embodiment of the utility model is except improving the Forming Quality of this cannulated glued membrane 1, can allow element more convenient in configuration.

Only as described above, it is only preferred embodiment of the present utility model, when not limiting the scope that the utility model is implemented with this, the simple equivalence of generally doing according to the utility model claims and patent specification content changes and modifies, and all still belongs in the scope that the utility model patent contains.

Claims (4)

1. hot blast blowing device, melts plastic material for after fused raw material, then is blow molded into a cannulated glued membrane, and this hot blast blowing device comprises:

One extruder, comprise that a cavity, with a mixing chamber sends away fused raw material along a progressive extrusion screw rod in discharging side, and at least one is arranged on the extrusion cooker on this cavity; And

One blowing unit, is blow molded into cannulated glued membrane by fused raw material, and comprises that one has blowing die holder, an air compressor of a die cavity being connected with the mixing chamber of this cavity, and an ajutage being connected between this air compressor and this blowing die holder;

It is characterized in that: the cavity of contiguous this extruder of this ajutage.

2. hot blast blowing device as claimed in claim 1, is characterized in that: more comprise one and draw and get drawing of this cannulated glued membrane and get unit.

3. hot blast blowing device, melts plastic material for fused raw material, then is blow molded into a cannulated glued membrane, and this hot blast blowing device comprises:

An extruder, comprises that one has the cavity of a mixing chamber, and one makes fused raw material along a progressive extrusion screw rod in discharging side; And

One blowing unit, is blow molded into cannulated glued membrane by fused raw material, and comprises that one has blowing die holder, an air compressor of a die cavity being connected with the mixing chamber of this cavity, and an ajutage being connected between this air compressor and this blowing die holder;

It is characterized in that: this blowing unit also comprises the blowing heater of a pair of air heat by this ajutage.

4. hot blast blowing device as claimed in claim 3, is characterized in that: more comprise one and draw and get drawing of this cannulated glued membrane and get unit.

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