CN204658919U - Bulk plastic hollow blow molding three layers of extruder head - Google Patents

Abstract

The utility model provides a large-scale plastic hollow blow molding three-layer extruder head, including a core rod, on which a core rod, a core rod connector and a guide sleeve are installed, and a material cylinder flange is installed on the top of the core rod. The top of the cylinder flange is equipped with a pull rod, the bottom of the material cylinder flange is equipped with a material cylinder, and the outer wall of the material cylinder is provided with an inner layer feed body, a middle layer feed body and an outer layer feed body. The layered fluid, the middle layered fluid and the bushing, a material plug is connected between the middle layered fluid and the bushing, the top of the plug is fixedly connected with a ejector rod; the bottom end of the core lifting rod is installed with a mandrel, and the bottom of the material cylinder is connected with a Die; there is an outer layer material flow channel between the material cylinder and the outer layer fluid, a middle layer material flow channel is set between the outer layer fluid and the middle layer fluid, and an inner layer material flow is set between the mandrel and the bushing road. The product of the utility model has high strength and more uniform wall thickness, meets the needs of enterprises for functionalization and light weight, and conforms to the market development trend.

Description

Large plastic hollow blow molding three-layer extrusion head

technical field

The utility model relates to an extruder head, in particular to a large plastic hollow blow molding three-layer extruder head.

Background technique

At present, most of the extrusion heads used in the domestic production of large plastic packaging containers such as IBC rigid plastic inner containers and large tanks adopt the form of single-layer hanger-type flow channels or double-layer heart-shaped envelope flow channels. These types of flow channels The products produced have the following two outstanding problems: 1. The mechanical properties of the product decrease due to the fusion line at a certain position or several positions, and it is easy to rupture and leak at this position; 2. The overall wall thickness of the product Uneven, prone to deformation after prolonged use. In addition, the application of the three-layer machine head can solve the current market demand for functional and lightweight packaging containers. For example, the product needs to be oil-resistant, impermeable, and weather-resistant. Therefore, the current machine head cannot guarantee the product quality and market development trend of large plastic containers, which restricts its production and promotion to a large extent.

Utility model content

The technical problem to be solved by the utility model is to provide a large-scale plastic hollow blow molding three-layer extruder head for the above-mentioned deficiencies in the prior art. The three-layer extruder head can not only improve the plasticizing effect of materials, but also can Ensure the smoothness of the material in the flow channel, promote the circumferential movement of the molten material more uniformly, eliminate the sintering line of the tube blank, ensure the uniformity of the product wall thickness, thereby avoiding the problem of product rupture and leakage, and solve the problem at the same time The market demand for functional and lightweight packaging containers can be promoted and applied.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a large-scale plastic hollow blow molding three-layer extruder head, which is characterized in that it includes a vertically arranged core rod, and the core rod is arranged from top to bottom. The mandrel and the mandrel connecting body fixedly connected with the mandrel are installed in sequence, as well as the guide sleeve for fixing the mandrel connecting body on the core lifting rod, and the top end of the mandrel is fixed with a material cylinder method Lan, the top of the material cylinder flange is equipped with a pull rod, the bottom of the material cylinder flange is equipped with a material cylinder, and the outer wall of the material cylinder is provided with an inner layer feed body, a middle layer feed body and an outer layer feed body. Material body, the inner layer feed body is provided with an inner layer feed port, the middle layer feed body is provided with a middle layer feed port, and the outer layer feed body is provided with an outer layer feed port, so The material cylinder is sequentially provided with an outer layer fluid, a middle layer fluid and a bushing fixedly connected with the material cylinder flange from the outside to the inside, the middle layer fluid and the bush are connected with a connecting seat, and the middle layer fluid A plug that slides up and down along the inner wall of the middle layer of the fluid and the outer wall of the bush is connected between the fluid and the bushing, and the top of the plug is fixedly connected with a push rod that runs through the connecting seat and the flange of the material cylinder; the core lifting rod The bottom end is fixed with a core mold through the lower cap of the rod, and the bottom of the material cylinder is fixedly connected with a die that matches the core mold through a pressure ring; The material flow channel of the outer layer communicated with the feed inlet of the layer, and the material flow channel of the middle layer connected with the feed inlet of the middle layer is arranged between the outer layer and the middle layer of the fluid, and the mandrel and the bushing An inner layer material flow channel communicating with the inner layer feed port is arranged between them.

The above-mentioned large-scale plastic hollow blow molding three-layer extruder head is characterized in that the outer wall of the outer layer fluid distribution is provided with an outer layer feed groove and a first outer layer fluid distribution groove in sequence from top to bottom in the axial direction. , the second flow distribution groove of the outer layer fluid separation, the third flow separation groove of the outer layer fluid separation, the vertical flow separation groove of the outer layer fluid separation, the spiral flow separation groove of the outer layer fluid separation and the annular direct flow groove of the outer layer fluid separation, the outer layer feed Groove, the first flow distribution groove of the outer layer, the second flow distribution groove of the outer layer fluid separation, the third flow distribution groove of the outer layer fluid separation, the vertical flow separation groove of the outer layer fluid separation, the spiral flow distribution groove of the outer layer fluid separation and the outer fluid separation ring The outer layer material flow path is formed by a straight-flow groove, the outer layer feed groove is arranged horizontally, the middle part of the outer layer feed groove communicates with the outer layer feed port, and the outer layer feed groove The two ends are connected with two first distribution grooves of the outer layer fluid respectively, and the two ends of the first distribution groove of the outer layer are respectively connected with two second distribution grooves of the outer layer fluid. The two ends of the two splitter grooves are respectively communicated with two third splitter grooves for the outer layer fluid separation, and the ends of the third splitter grooves for the outer layer fluid separation are communicated with a vertical vertical groove for the outer layer fluid separation. The end of the vertical fluid separation groove is connected with the outer layer fluid separation spiral flow groove, and the end of the outer layer fluid separation spiral flow groove is connected with the outer layer fluid separation annular straight flow groove.

The above-mentioned large-scale plastic hollow blow molding three-layer extruder head is characterized in that, the outer wall of the middle layer fluid is arranged in sequence from top to bottom along the axial direction with a middle layer feed groove, a first middle layer fluid distribution groove, and a middle layer fluid distribution channel. The second fluid distribution groove, the third fluid distribution groove in the middle layer, the vertical fluid distribution groove in the middle layer, the spiral flow distribution groove in the middle layer, and the annular straight flow groove in the middle layer, the feeding groove in the middle layer, the first fluid distribution groove in the middle layer , the second distribution channel for the middle layer fluid separation, the third distribution channel for the middle layer fluid separation, the vertical fluid distribution groove for the middle layer, the spiral flow distribution channel for the middle layer fluid separation and the annular direct flow channel for the middle layer fluid separation form the material flow channel in the middle layer, and the middle layer enters the The trough is arranged horizontally, the middle part of the middle layer feed chute communicates with the middle layer feed port, and the two ends of the middle layer feed chute are respectively connected with two first flow distribution grooves for the middle layer fluid separation, and the middle layer fluid separation The two ends of the first splitter groove are respectively connected with two second splitter grooves for separating fluid in the middle layer. The end of the third distributing groove is communicated with the middle layer fluid separating vertical groove vertically arranged, and the end of the middle layer separating fluid vertical groove is connected with the middle layer fluid separating spiral distributing groove, and the end of the middle layer fluid separating spiral distributing groove is The part communicates with the annular straight-flow groove of the mid-level fluid.

The above-mentioned large-scale plastic hollow blow molding three-layer extruder head is characterized in that the outer wall of the mandrel is provided with an inner layer feed groove, a mandrel first shunt groove, and a mandrel second channel along the axial direction from top to bottom. The second shunting groove, the third shunting groove of the mandrel, the vertical groove of the mandrel, the spiral shunting groove of the mandrel, the first annular direct-flow groove of the mandrel and the second annular direct-flow groove of the mandrel, the inner layer feed groove, the core Formation of the first mandrel splitter groove, the second mandrel splitter groove, the third mandrel splitter groove, the mandrel vertical groove, the mandrel spiral splitter groove, the first mandrel annular direct-flow groove and the mandrel second annular direct-flow groove The inner layer material flow channel, the inner layer feeding groove is arranged horizontally, the middle part of the inner layer feeding groove is communicated with the inner layer feeding port, and the two ends of the inner layer feeding groove are connected respectively There are two mandrel first shunt grooves, two ends of the mandrel first shunt groove are respectively connected with two mandrel second shunt grooves, and the two ends of the mandrel second shunt groove are respectively connected with two core rods The third splitter groove of the mandrel, the end of the third splitter groove of the mandrel is connected with the vertical mandrel groove arranged vertically, the end of the vertical groove of the mandrel is connected with the spiral shunt groove of the mandrel, the core The end of the rod spiral splitter groove communicates with the first annular direct-flow groove of the mandrel, and the second annular direct-flow groove of the mandrel is parallel to the first annular direct-flow groove of the mandrel.

The above-mentioned large-scale plastic hollow blow molding three-layer extruder head is characterized in that the two outer layer fluid first distribution grooves, the two outer layer fluid second distribution grooves and the two outer layer The third splitter slots of the splitter body are all in the shape of a figure-eight.

The above-mentioned large-scale plastic hollow blow molding three-layer extruder head is characterized in that the two middle layer fluid separation first distribution grooves, the two middle layer fluid separation second distribution grooves and the two middle layer fluid separation first distribution grooves The three splitters are all in a figure-eight shape.

The above-mentioned large-scale plastic hollow blow molding three-layer extruder head is characterized in that the first splitter slots of the two mandrels, the second splitter slots of the two mandrels and the third splitter slots of the two mandrels All are in the shape of a figure of eight.

The above-mentioned large-scale plastic hollow blow molding three-layer extruder head is characterized in that the outer layer feed groove, the outer layer fluid distribution first distribution groove, the outer layer fluid separation second distribution groove, the outer layer fluid distribution third The groove depths of the splitter groove, the vertical groove for separating fluid in the outer layer and the helical splitter groove for separating fluid in the outer layer decrease successively.

The above-mentioned large-scale plastic hollow blow molding three-layer extruder head is characterized in that the middle layer feed trough, the middle layer fluid separation first distribution groove, the middle layer fluid separation second distribution groove, the middle layer fluid separation third distribution groove, the middle layer The groove depths of the fluid-distributing vertical grooves and the middle-layer fluid-dividing spiral grooves decrease successively.

The above-mentioned large-scale plastic hollow blow molding three-layer extruder head is characterized in that the inner layer feed groove, the first mandrel splitter groove, the mandrel second splitter groove, the mandrel third splitter groove, the mandrel vertical The groove depths of the direction groove and the mandrel helical shunt groove decrease successively.

Compared with the prior art, the utility model has the following advantages:

1. The outer wall of the outer layer, the middle layer of the fluid and the mandrel of the present utility model are provided with a plurality of connected flow grooves, wherein the outer wall of the outer layer, the middle layer of the fluid and the outer wall of the mandrel have 16 respectively. Spiral distribution groove, which enables the three kinds of molten materials to be sheared and boosted multiple times in the outer material flow channel, middle material flow channel and inner material flow channel respectively, improving the plasticizing effect of the molten material and thus improving product quality.

2. The utility model eliminates the welding line of the tube embryo, avoids the problem of rupture and leakage of the large plastic container due to the existence of the welding line, and ensures the safety of the large plastic container.

3. The groove depths of the multiple flow distribution grooves on the outer wall of the utility model, the middle layer and the outer wall of the mandrel gradually decrease from top to bottom, which ensures the smoothness of the molten material in the flow channel and promotes the melting of the molten material. Carry out circumferential movement more evenly and enter the material storage cylinder of the material tank to ensure that the wall thickness of the symmetrical position of the tube embryo is more uniform, thereby ensuring the uniformity of the wall thickness of the large plastic container.

4. The three-layer extruder head of this utility model solves the needs of product diversification and light weight, and can meet various requirements such as oil resistance, corrosion resistance, light protection, anti-seepage, aging resistance and light weight of the product at the same time.

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.

Description of drawings

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

Fig. 2 is an expanded view of the outer layer of the utility model.

Fig. 3 is an expanded view of stratified fluid in the utility model.

Fig. 4 is an expanded view of the mandrel of the present invention.

Explanation of reference signs:

1—middle layer feed body; 2—tie rod; 3—rod cap;

4—core lifting rod; 5—ejector rod; 6—material cylinder flange;

7—outer layer fluid separation; 7-1—outer layer feed trough;

7-2—the first distribution groove of the outer layer of fluid separation; 7-3—the second distribution groove of the outer layer of fluid separation;

7-4—the third distribution groove of the outer layer of fluid separation; 7-5—the vertical groove of the outer layer of fluid separation;

7-6—the outer layer fluid separation spiral flow groove; 7-7—the outer layer fluid separation annular flow groove;

8—outer feed body; 9—connecting seat; 10—intermediate fluid separation;

10-1—middle layer feed trough;

10-3—the second distribution tank of the middle layer of fluid separation; 10-4—the third distribution tank of the middle layer of fluid separation;

10-5—vertical groove for fluid separation in the middle layer; 10-6—spiral flow groove for fluid separation in the middle layer;

10-7—annular straight-flow groove for middle layer separation fluid; 11—material cylinder; 12—material plug;

13—Bushing; 14—Mandrel Connector; 15—Pressure Ring;

16—die; 17—mandrel; 18—guide sleeve;

19—Rod cap; 20—Mandrel; 20-1—Inner layer feed trough;

20-2—the first shunt groove of mandrel; 20-3—the second shunt groove of mandrel;

20-4—the third splitter groove of mandrel; 20-5—vertical groove of mandrel;

20-6—mandrel spiral splitter; 20-7—mandrel first annular flow groove;

20-8—the second annular straight-flow groove of mandrel; 21—inner layer feed body.

Detailed ways

As shown in Figure 1, the utility model comprises a vertically arranged core rod 4, on which a core rod 20 and a core rod connector 14 fixedly connected with the core rod 20 are sequentially installed on the core rod 4, And the guide sleeve 8 for fixing the mandrel joint body 14 on the core rod 4, the top of the mandrel 20 is fixedly installed with the material cylinder flange 6 through the cap 3 on the rod, and the top of the material cylinder flange 6 A tie rod 2 is installed, a material cylinder 11 is installed on the bottom of the material cylinder flange 6, and an inner layer feed body 21, a middle layer feed body 1 and an outer layer feed body 8 are arranged on the outer wall of the material cylinder 3, The inner layer feed body 21 is provided with an inner layer feed port, the middle layer feed body 1 is provided with a middle layer feed port, and the outer layer feed body 8 is provided with an outer layer feed port, so The material cylinder 11 is sequentially provided with the outer layer fluid 7, the middle layer fluid 10 and the bushing 13 fixedly connected with the material cylinder flange 6 from the outside to the inside, and the middle layer fluid 10 and the bushing 13 are connected with Connecting seat 9, a plug 12 that slides up and down along the inner wall of the middle sub-fluid 10 and the outer wall of the bushing 13 is connected between the middle sub-fluid 10 and the bushing 13, and the top end of the plug 12 is fixedly connected with a through-connecting seat 9 and the push rod 5 of the material cylinder flange 6; the bottom end of the core lifting rod 4 is fixedly equipped with a core mold 17 through a rod lower cap 19, and the bottom of the material cylinder 11 is fixedly connected with the core mold 17 through a pressure ring 15 Matching die 16; an outer layer material flow passage communicated with the outer layer feed port is arranged between the material cylinder 11 and the outer layer of fluid 7, and the outer layer of fluid 7 and the middle layer of fluid Between the 10 is provided a middle layer material flow channel which communicates with the middle layer feed port, and between the mandrel 20 and the bushing 13 is provided an inner layer material flow channel which communicates with the inner layer feed port.

As shown in Figure 2, in this embodiment, an outer layer feed groove 7-1 and a first outer layer flow divider groove 7-2 are arranged on the outer wall of the outer layer divider fluid 7 in the axial direction from top to bottom. , the second flow distribution groove 7-3 of the outer layer fluid separation, the third flow separation groove 7-4 of the outer layer fluid separation, the vertical flow separation groove 7-5 of the outer layer fluid separation, the spiral flow distribution groove 7-6 of the outer layer fluid separation and the outer layer separation fluid Fluid annular straight-through groove 7-7, the outer layer feed groove 7-1, the outer layer fluid separation first distribution groove 7-2, the outer layer fluid separation second distribution groove 7-3, the outer layer fluid separation third flow groove Divider groove 7-4, outer layer fluid distribution vertical groove 7-5, outer layer fluid separation spiral distribution groove 7-6 and outer layer fluid distribution annular straight groove 7-7 form the outer layer material flow path, the The outer layer feed tank 7-1 is arranged horizontally, the middle part of the outer layer feed tank 7-1 communicates with the outer layer feed port, and the two ends of the outer layer feed tank 7-1 are respectively connected with Two outer layer fluid first distribution grooves 7-2, the two ends of the outer layer fluid first distribution groove 7-2 are respectively connected with two outer layer fluid second distribution grooves 7-3, the outer layer Two ends of the second splitter groove 7-3 of the layered fluid are connected with two third splitter grooves 7-4 of the outer layer fluid respectively, and the ends of the third splitter groove 7-4 of the outer layer fluid are connected with a vertical The outer layer fluid separation vertical groove 7-5 is arranged, and the end of the outer layer fluid separation vertical groove 7-5 is connected with the outer layer fluid separation spiral flow groove 7-6, and the outer layer fluid separation spiral flow groove 7-6 The end of 7-6 is communicated with the annular direct-current groove 7-7 of outer layer fluid separation.

As shown in Figure 3, in this embodiment, the outer wall of the middle layer fluid 10 is provided with a middle layer feed groove 10-1, a middle layer fluid first distribution groove 10-2, and a middle layer fluid distribution tank 10-1 in order from top to bottom in the axial direction. The second fluid distribution groove 10-3, the third fluid distribution groove 10-4 in the middle layer, the vertical fluid distribution groove 10-5 in the middle layer, the spiral flow distribution groove 10-6 in the middle layer, and the annular straight flow groove 10-7 in the middle layer , the middle layer feed tank 10-1, the middle layer fluid separation first distribution groove 10-2, the middle layer separation fluid second distribution groove 10-3, the middle layer separation fluid third distribution groove 10-4, the middle layer fluid separation vertical groove 10-5. The middle-layer fluid-splitting spiral flow channel 10-6 and the middle-layer fluid-separating annular straight-flow groove 10-7 form the middle-layer material flow channel, the middle-layer feeding groove 10-1 is arranged horizontally, and the middle-layer feeding The middle part of the tank 10-1 communicates with the middle layer feed port, and the two ends of the middle layer feed tank 10-1 are respectively communicated with two middle layer first splitter tanks 10-2, and the middle layer splitter first The two ends of the splitter tank 10-2 are respectively connected with two second splitter tanks 10-3 for middle-level fluid separation, and the two ends of the second splitter tank 10-3 for middle-level fluid are connected with two third splitter tanks for middle-level fluid respectively. Groove 10-4, the end of the third flow distribution groove 10-4 of the middle layer is connected with a vertically arranged middle layer vertical groove 10-5, and the end of the middle layer vertical groove 10-5 It is connected with a middle-layer fluid-splitting spiral flow channel 10-6, and the end of the middle-layer fluid-splitting spiral flow groove 10-6 is connected with the middle-layer fluid-splitting annular straight-flow groove 10-7.

As shown in Figure 4, in this embodiment, the outer wall of the mandrel 20 is provided with an inner layer feed groove 20-1, a mandrel first shunt groove 20-2, and a mandrel second channel from top to bottom in the axial direction. Two shunt grooves 20-3, mandrel third shunt groove 20-4, mandrel vertical groove 20-5, mandrel spiral shunt groove 20-6, mandrel first annular direct current groove 20-7 and mandrel second Two annular straight-flow grooves 20-8, the inner layer feed groove 20-1, the first mandrel shunt groove 20-2, the mandrel second shunt groove 20-3, the mandrel third shunt groove 20-4, The mandrel vertical groove 20-5, the mandrel spiral splitter groove 20-6, the mandrel first annular direct-flow groove 20-7 and the mandrel second annular direct-flow groove 20-8 form the inner material flow path, The inner layer feed tank 20-1 is arranged horizontally, the middle part of the inner layer feed tank 20-1 communicates with the inner layer feed port, and the two ends of the inner layer feed tank 20-1 are respectively There are two mandrel first shunt grooves 20-2 in communication, and the two ends of the mandrel first shunt groove 20-2 are respectively connected with two mandrel second shunt grooves 20-3, and the mandrel second shunt grooves 20-3 The two ends of the groove 20-3 are respectively connected with two mandrel third splitter grooves 20-4, and the ends of the mandrel third splitter grooves 20-4 are connected with vertically arranged mandrel vertical grooves 20-5 , the end of the mandrel vertical groove 20-5 is connected with the mandrel spiral flow groove 20-6, and the end of the mandrel spiral flow groove 20-6 is connected with the first annular direct flow groove 20-7 of the mandrel. The second annular direct current groove 20-8 of the mandrel is in parallel with the first annular direct current groove 20-7 of the mandrel.

In this embodiment, the first two distribution grooves 7-2 for the outer fluid separation, the second separation grooves 7-3 for the two outer fluid separations, and the third distribution grooves 7 for the two outer fluid separations -4 are all in a figure-eight shape, which is conducive to the continuous diversion of the outer layer materials.

In this embodiment, the two first distribution channels 10-2 for separating fluid in the middle layer, the second distribution grooves 10-3 for separating fluid in the middle layer and the third distribution groove 10-4 for separating fluid in the two middle layers are all It is in a figure-eight shape, which is conducive to the continuous diversion of middle layer materials.

In this embodiment, the two mandrel first splitter grooves 20-2, the two mandrel second splitter grooves 20-3 and the two mandrel third splitter grooves 20-4 are all in a figure-eight shape , which is conducive to the continuous diversion of the inner material.

In this embodiment, the outer layer feed tank 7-1, the outer layer fluid distribution first distribution tank 7-2, the outer layer fluid distribution second distribution tank 7-3, the outer layer fluid distribution third distribution tank 7- 4. The groove depths of the outer layer fluid-distributing vertical groove 7-5 and the outer layer fluid-dividing spiral groove 7-6 decrease successively, which ensures the smooth flow of the outer layer of plastic and promotes the outer layer of plastic to flow more evenly. to the movement.

In this embodiment, the middle layer feed tank 10-1, the middle layer fluid first distribution tank 10-2, the middle layer fluid second distribution tank 10-3, the middle layer fluid third distribution tank 10-4, the middle layer The groove depths of the fluid vertical groove 10-5 and the middle-layer fluid-splitting spiral flow groove 10-6 are successively reduced, which ensures the smooth flow of the middle-layer plastic and promotes a more uniform circumferential movement of the outer-layer plastic.

In this embodiment, the inner layer feed trough 20-1, the first mandrel distribution channel 20-2, the mandrel second distribution channel 20-3, the mandrel third distribution channel 20-4, the mandrel vertical The groove depths of the groove 20-5 and the mandrel spiral splitter groove 20-6 decrease successively, which ensures the smoothness of the flow of the outer layer of plastic and promotes a more uniform circumferential movement of the inner layer of plastic.

During use, the outer layer material enters the outer layer material flow channel connected with the outer layer feed port through the outer layer feed port, and the outer layer material passes through the outer layer feed groove 7-1 on the outer wall of the outer layer fluid 7, the outer layer The first flow distribution groove 7-2 for the layered fluid, the second flow separation groove 7-3 for the outer layer flow, the third flow separation groove 7-4 for the outer layer flow separation, the vertical groove 7-5 for the outer layer flow separation, and the outer layer flow separation channel The diversion of the spiral splitter groove 7-6 and the outer layer fluid-distributing annular direct-flow groove 7-7 forms the outer layer of the tube embryo; the middle layer material enters the middle layer material flow channel connected with the middle layer feed port through the middle layer feed port, and the middle layer material Through the middle layer feed tank 10-1 on the outer wall of the middle layer fluid 10, the first middle layer fluid distribution channel 10-2, the middle layer fluid separation second distribution channel 10-3, the middle layer fluid separation third distribution channel 10-4, the middle layer The diversion of the fluid-separating vertical groove 10-5, the middle-layer fluid-separating spiral flow groove 10-6 and the middle-layer fluid-separating annular straight-flow groove 10-7 forms the middle layer of the tube embryo; the inner layer material enters the inner layer through the inner layer feed port In the inner layer material flow channel connected to the feed port, the inner layer material passes through the inner layer feed groove 20-1 on the outer wall of the mandrel 20, the first mandrel splitter groove 20-2, and the second mandrel splitter groove 20-3 , mandrel third splitter groove 20-4, mandrel vertical groove 20-5, mandrel spiral splitter groove 20-6, mandrel first annular direct current groove 20-7 and mandrel second annular direct current groove 20 The diversion of -7 forms the inner layer of the tube embryo; the outer layer of the tube embryo wraps the middle layer of the tube embryo and enters the material cylinder 11 together, and is bonded with the inner layer of the tube embryo to form a three-layer material in a molten state. When the material entering the material cylinder 11 When the required position of the product is reached, the hydraulic system drives the ejector pin 5 to press down on the material plug 12, and extrudes through the gap between the die 16 and the core die 17 to form a product tube embryo.

The above descriptions are only preferred embodiments of the utility model, and do not limit the utility model in any way. All simple modifications, changes and equivalent changes made to the above embodiments according to the technical essence of the utility model still belong to the protection scope of the technical solution of the utility model.

Claims (10)

1. Large-scale plastic hollow blow molding three-layer extruder head, characterized in that it includes a vertically arranged core rod (4), and the core rod (4) is sequentially installed with mandrels (20 ) and the mandrel adapter (14) fixedly connected with the mandrel (20), and the guide sleeve (8) for fixing the mandrel adapter (14) on the mandrel (4), the mandrel The top of (20) is fixedly equipped with material cylinder flange (6) by bar upper cap (3), and pull bar (2) is installed on the top of described material cylinder flange (6), and the top of described material cylinder flange (6) The bottom end is equipped with a material cylinder (11), and the outer wall of the material cylinder (11) is provided with an inner layer feed body (21), a middle layer feed body (1) and an outer layer feed body (8). The layer feed body (21) is provided with an inner layer feed port, the middle layer feed body (1) is provided with a middle layer feed port, and the outer layer feed body (8) is provided with an outer layer feed port mouth, the material cylinder (11) is sequentially provided with outer layer fluid (7), middle layer fluid (10) and bushing (13) fixedly connected with material cylinder flange (6) from outside to inside, so A connection seat (9) is connected between the middle layer fluid (10) and the bushing (13), and a connecting seat (9) along the inner wall of the middle layer fluid (10) is connected between the middle layer fluid (10) and the bushing (13). A material plug (12) that slides up and down on the outer wall of the bushing (13), the top of the material plug (12) is fixedly connected with a push rod (5) that runs through the connecting seat (9) and the material cylinder flange (6); The bottom end of the core rod (4) is fixedly equipped with a mandrel (17) by a rod lower cap (19), and the bottom of the material cylinder (11) is fixedly connected with a mandrel (17) through a pressure ring (15). Matching mouth die (16); an outer layer material flow passage communicated with the outer layer feed port is arranged between the material cylinder (11) and the outer layer of fluid (7), and the outer layer of fluid (7) and the middle layer sub-fluid (10) are provided with a middle layer material flow channel communicated with the middle layer feed port, between the mandrel (20) and the bushing (13) is provided with the inner The material flow channel of the inner layer communicated with the feed inlet of the layer. 2. The large-scale plastic hollow blow molding three-layer extruder head according to claim 1, characterized in that, the outer wall of the outer layer sub-fluid (7) is sequentially provided with outer layer feeding materials from top to bottom in the axial direction. Groove (7-1), the first flow distribution groove (7-2) of the outer layer fluid distribution, the second flow distribution groove (7-3) of the outer layer separation fluid, the third flow distribution groove (7-4) of the outer layer fluid separation, The layered fluid vertical groove (7-5), the outer layer separated fluid spiral flow groove (7-6) and the outer layer separated fluid annular straight groove (7-7), the outer layer feed groove (7-1 ), the first flow distribution groove (7-2) of the outer layer, the second flow distribution groove (7-3) of the outer layer flow distribution, the third flow distribution groove (7-4) of the outer layer flow separation, and the vertical distribution flow of the outer layer flow distribution Groove (7-5), outer layer fluid-distributing spiral flow channel (7-6) and outer layer fluid-dividing annular straight-through groove (7-7) form the outer layer material flow path, and the outer layer feed groove ( 7-1) is arranged horizontally, the middle part of the outer layer feed tank (7-1) communicates with the outer layer feed port, and the two ends of the outer layer feed tank (7-1) are respectively connected with Two outer-layer fluid-distributing first distributing grooves (7-2), the two ends of the outer-layer fluid-dividing first distributing grooves (7-2) are communicated with two outer-layer fluid-dividing second distributing grooves (7-2) respectively 3), the two ends of the second diversion groove (7-3) of the outer layer of fluid are respectively connected with two third diversion grooves of the outer layer of fluid (7-4), the third diversion groove of the outer layer of fluid The end of (7-4) is communicated with the vertical groove (7-5) of outer layer fluid separation that is arranged vertically, and the end of described outer layer fluid separation vertical groove (7-5) is communicated with the outer layer fluid separation vertical groove (7-5). A spiral flow channel (7-6), the end of the outer layer fluid separation spiral flow channel (7-6) communicates with the outer layer fluid flow annular straight channel (7-7). 3. The large-scale plastic hollow blow molding three-layer extruder head according to claim 1 or 2, characterized in that, the outer wall of the middle layer fluid (10) is sequentially provided with middle layer feeding materials from top to bottom in the axial direction. Groove (10-1), the first distribution channel (10-2) of the middle layer fluid distribution, the second distribution channel (10-3) of the middle layer fluid distribution, the third distribution channel (10-4) of the middle layer fluid distribution, the middle layer fluid distribution vertical To the groove (10-5), the middle layer fluid separation spiral flow groove (10-6) and the middle layer fluid distribution annular straight groove (10-7), the middle layer feed groove (10-1), the middle layer fluid separation first Distributor groove (10-2), middle layer fluid distribution second distribution groove (10-3), middle layer fluid distribution third distribution groove (10-4), middle layer fluid distribution vertical groove (10-5), middle layer fluid distribution spiral The distribution channel (10-6) and the middle-level fluid-distributing annular straight-through groove (10-7) form the middle-level material flow channel, and the middle-level feed tank (10-1) is arranged horizontally, and the middle-level feed tank ( The middle part of 10-1) communicates with the middle layer feed port, and the two ends of the middle layer feed tank (10-1) are respectively connected with two middle layer first flow distribution tanks (10-2), and the middle layer The two ends of the first fluid distribution groove (10-2) are respectively connected with two second fluid distribution grooves (10-3) in the middle layer, and the two ends of the second fluid distribution groove (10-3) in the middle layer are respectively There are two middle-layer fluid-distributing third distribution grooves (10-4) in communication, and the ends of the middle-layer fluid-dividing third distribution grooves (10-4) are communicated with vertically arranged middle-layer fluid-distributing vertical grooves (10-5 ), the end of the middle layer fluid separation vertical groove (10-5) is connected with the middle layer fluid separation spiral flow groove (10-6), and the end of the middle layer separation fluid spiral flow groove (10-6) is connected with the middle layer The annular straight-flow groove (10-7) of the shunt fluid is connected. 4. The large-scale plastic hollow blow molding three-layer extruder head according to claim 3, characterized in that, the outer wall of the mandrel (20) is sequentially provided with inner layer feed grooves ( 20-1), mandrel first splitter slot (20-2), mandrel second splitter slot (20-3), mandrel third splitter slot (20-4), mandrel vertical slot (20-5 ), the mandrel spiral splitter groove (20-6), the mandrel first annular direct-flow groove (20-7) and the mandrel second annular direct-flow groove (20-8), the inner layer feed groove (20 -1), mandrel first splitter slot (20-2), mandrel second splitter slot (20-3), mandrel third splitter slot (20-4), mandrel vertical slot (20-5) , mandrel spiral splitter groove (20-6), mandrel first annular direct-flow groove (20-7) and mandrel second annular direct-flow groove (20-8) form the inner material flow path, the The inner layer feed tank (20-1) is arranged horizontally, the middle part of the inner layer feed tank (20-1) communicates with the inner layer feed port, and the inner layer feed tank (20-1) Two ends of the mandrel first shunt groove (20-2) are respectively communicated with two mandrel first shunt grooves (20-2), and two ends of the mandrel first shunt groove (20-2) are connected with two mandrel second shunt grooves (20-2) respectively. 3), the two ends of the mandrel second shunt groove (20-3) are respectively connected with two mandrel third shunt grooves (20-4), and the mandrel third shunt groove (20-4) The end is communicated with a mandrel vertical groove (20-5) arranged vertically, and the end of the mandrel vertical groove (20-5) is communicated with a mandrel spiral splitter groove (20-6), and the core The end of the rod spiral splitter groove (20-6) communicates with the first annular direct-current groove (20-7) of the mandrel, and the second annular direct-flow groove (20-8) of the mandrel communicates with the first annular groove of the mandrel. Shaped straight-flow groove (20-7) is parallel. 5. The large-scale plastic hollow blow molding three-layer extruder head according to claim 2, characterized in that, the two outer layers divide the fluid into the first distribution groove (7-2), the two outer layers divide the fluid Both the second fluid distribution groove (7-3) and the third fluid distribution groove (7-4) of the two outer layers are in a figure-eight shape. 6. The large-scale plastic hollow blow molding three-layer extruder head according to claim 3, characterized in that, the first splitter grooves (10-2) of the two middle-layer fluid separations, the second splitter grooves (10-2) of the two middle-layer fluid separations, Both the second splitter groove (10-3) and the third splitter groove (10-4) of the two intermediate fluid separations are in a figure-eight shape. 7. The large-scale plastic hollow blow molding three-layer extruder head according to claim 4, characterized in that, the first splitter grooves (20-2) of the two mandrels, the second splitter of the two mandrels Both the groove (20-3) and the third splitter groove (20-4) of the two mandrels are in a figure-eight shape. 8. The large-scale plastic hollow blow molding three-layer extruder head according to claim 2, characterized in that, the outer layer feed groove (7-1), the outer layer fluid distribution first distribution groove (7-2 ), the second flow distribution groove (7-3) of the outer layer, the third flow distribution groove (7-4) of the outer layer, the vertical groove (7-5) of the outer layer of fluid separation and the spiral flow distribution groove of the outer layer of fluid separation The groove depth of (7-6) decreases successively. 9. The large-scale plastic hollow blow molding three-layer extruder head according to claim 3, characterized in that, the middle layer feed trough (10-1), the middle layer split fluid first distribution groove (10-2), The second flow distribution groove (10-3) of the middle layer, the third flow distribution groove (10-4) of the middle layer, the vertical groove (10-5) of the middle layer and the spiral flow groove (10-6) of the middle layer The groove depth decreases successively. 10. The large-scale plastic hollow blow molding three-layer extruder head according to claim 4, characterized in that, the inner layer feed groove (20-1), the mandrel first distribution groove (20-2), The groove depths of mandrel second splitter groove (20-3), mandrel third splitter groove (20-4), mandrel vertical groove (20-5) and mandrel spiral splitter groove (20-6) decrease successively Small.