CN205097504U - A gas assistance forming die for plastics tubular product is extruded - Google Patents

Abstract

The utility model discloses a gas assistance forming die for plastics tubular product is extruded belongs to plastics tubular product basis forming die field, including die body, bush and mandrel, the mandrel is equipped with the mandrel inner chamber, and the mandrel includes through first section of threaded connection's mandrel and mandrel second section, and this mandrel setting is just for extruding the chamber way between mandrel and the bush in the bush, the bush is connected in die body one end, and the die body is equipped with die body inner chamber and die body exocoel, it is connected for the melt canal with the die body exocoel to extrude the chamber way, die body inner chamber one end is connected with the mandrel inner chamber, and the other end is connected with the air vent that sets up on the die body. Through gas -assisted controlling means and bush, make to form the air cushion rete between polymer melt and the bush, makes original non - slide and adhere the bush and extrude the mode and turn into the air cushion and slide the non - bush of adhereing completely and extrude the mode, gain obvious bush and subtract to glue and fall the effect that hinders, the service life of the quality and the output of tubular product reduce the mould loss and prolong the mould is prolonged.

Description

A kind of gas-assisted forming mold for plastic tube extrusion

Technical field

The utility model belongs to mould field, plastic pipe basis, particularly relates to a kind of gas-assisted forming mold for plastic tube extrusion.

Background technology

Traditional tube forming is by the raw materials for plastics production of hot melt by mouth core rod model extrusion, then after stock mould cooling and shaping, form required section bar.There is following problem in traditional mode of production: often occur " Barus effect " in 1, producing, namely depanning is expanded, and extrusion efficiency is low, and energy consumption is large, and size of pipe and tubing deviation is large; 2, in actual production when extruded velocity exceedes certain certain value, extrudate surface tarnishes gradually, occurs sharkskin shape, and then becomes surface irregularity and namely occur that melt is broken; 3, be mostly non-slippage adhesion die extrusion between melt and extrusion neck ring mold, melt viscosity is high, resistance is large, and speed of production is limited, and can only improve output by increasing production line; 4, due to the restriction of traditional extrusion molding feature, tubing article there will be the series mass problems such as internal stress is large, buckling deformation is large, dimensional accuracy is low, also causes loss simultaneously, be down to the mold use life-span to mould.

Summary of the invention

In order to overcome above-mentioned the deficiencies in the prior art part, the utility model provides a kind of gas-assisted forming mold for plastic tube extrusion, and its structure is simple, it is simple and easy, practical to operate.

For practice above-mentioned purpose, the utility model adopts following technical scheme: a kind of gas-assisted forming mold for plastic tube extrusion, comprise die body, mouth mould and core, described core is provided with core inner chamber, core comprises the core first paragraph and core second segment that are threaded connection, this core to be arranged in mouthful mould and for extruding cavity between core and mouth mould, described mouth mould is connected to die body one end, die body is provided with die body inner chamber and die body exocoel, described cavity of extruding is connected for melt canal with die body exocoel, described die body inner chamber one end is connected with core inner chamber, the other end is connected with the passage be arranged on die body.

In technique scheme, described core inner chamber comprises several pores running through whole core.

In technique scheme, described die body is basket die body, spiral die body or stent-type die body.

In technique scheme, described mouth mould is provided with temp probe installing hole.

The beneficial effects of the utility model are: form aircushioned surgetank between polymer melt and core, make original non-slippage adhesion die extrusion mode be converted into air cushion complete slippage non-adhesive die extrusion mode, obtain the effect of obvious mouth mould reducing adhesion resistance; Extruding pipe material die swelling can be reduced greatly, improve the dimensional accuracy of tubing, the problems such as the melt that can solve raises speed simultaneously causes is broken; Improve the Quality and yield of tubing, and can pressure drop of die be reduced, economize energy, reduce mould loss and extend die life.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the structural representation of core first paragraph.

Fig. 3 is the right view of Fig. 2.

Fig. 4 is the structural representation of core second segment.

Wherein: 1. die body, 2. mouthful mould, 3. core first paragraph, 4. core second segment, 5. extrudes exocoel, 6. core inner chamber, 7. die body inner chamber, 8. die body exocoel, 9. passage, 10. temp probe installing hole.

Detailed description of the invention

Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.

As Fig. 1, Fig. 2, a kind of gas-assisted forming mold for plastic tube extrusion shown in Fig. 3 and Fig. 4, comprise die body 1, mouth mould 2 and core, described core is provided with core inner chamber 6, core comprises the core first paragraph 3 and core second segment 4 that are threaded connection, this core to be arranged in mouthful mould 2 and for extruding cavity 5 between core and mouth mould, described mouth mould 2 is connected to die body 1 one end, die body 1 is provided with die body inner chamber 7 and die body exocoel 8, described cavity 5 of extruding is connected for melt canal with die body exocoel 8, described die body inner chamber 7 one end is connected with core inner chamber 5, the other end is connected with the passage 9 be arranged on die body 1.

In technique scheme, described core inner chamber 5 comprises several pores running through whole core.Pore quantity and aperture can be arranged according to actual needs, and the present embodiment adopts 6 apertures to be the pore of 1mm.

In technique scheme, described die body 1 is basket die body, spiral die body or stent-type die body.The present embodiment adopts spiral die body.

In technique scheme, described mouth mould 2 is provided with temp probe installing hole 10.The inner surface of mouth mould 2 needs polishing.

When using device of the present utility model, first corresponding mouth mould size and core size to be selected according to the specification of plastic pipe, after the heating collar temperature of die body 1 and mouth mould 2 reaches technological temperature, compressed air is passed into from passage 9, now, compressed air flows into core inner chamber 6 by die body inner chamber 7, then enter from six apertures of core first paragraph 3, vertically flow out along runner 90 °, extrude in cavity 5 formed aircushioned surgetank, original non-slippage adhesion die extrusion mode is made to be converted into air cushion complete slippage non-adhesive die extrusion mode, obtain the effect of obvious mouth mould reducing adhesion resistance, extruding pipe material die swelling can be reduced greatly, improve the dimensional accuracy of tubing, the problems such as the melt that can solve raises speed simultaneously causes is broken, improve the Quality and yield of tubing, and can pressure drop of die be reduced, economize energy, reduce mould loss and extend die life.

The above; be only the utility model preferably detailed description of the invention; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.

Claims (4)

1. the gas-assisted forming mold for plastic tube extrusion, comprise die body, mouth mould and core, it is characterized in that: described core is provided with core inner chamber, core comprises the core first paragraph and core second segment that are threaded connection, this core to be arranged in mouthful mould and for extruding cavity between core and mouth mould, described mouth mould is connected to die body one end, die body is provided with die body inner chamber and die body exocoel, described cavity of extruding is connected for melt canal with die body exocoel, described die body inner chamber one end is connected with core inner chamber, and the other end is connected with the passage be arranged on die body.

2. a kind of gas-assisted forming mold extruded for plastic tube according to claim 1, is characterized in that: described core inner chamber comprises several pores running through whole core.

3. a kind of gas-assisted forming mold extruded for plastic tube according to claim 1, is characterized in that: described die body is basket die body, spiral die body or stent-type die body.

4. a kind of gas-assisted forming mold extruded for plastic tube according to claim 1, is characterized in that: described mouth mould is provided with temp probe installing hole.