Double-layer double-spreader and multi-layer spreader extrusion die head structure
By designing the double-layer double-split shuttle and multi-layer shunt shuttle extrusion die structure, the problem of color change and mixing lines in the double-layer co-extrusion process of traditional single-channel shunt shuttle is solved, and color change without convergence lines is achieved Efficient and stable plastic processing improves the appearance and stability of the product.
Patent Information
- Application Number
- CN202421005810.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-10
AI Technical Summary
The existing traditional shunt shuttle is a single runner, which cannot effectively solve the color change problem and the mixing line problem of double-layer coextrusion, especially the product instability and appearance problems caused by plastic processing.
A double-layer double-splitting shuttle and multi-layer shunt shuttle extrusion die structure is designed. By installing a shunt shuttle at the bottom of the outer feeding material, and installing a material barrel on its outer side, the inner flow rubber core and the outer core sleeve are Set up a connected inner and outer flow path between the two to achieve uniform distribution and convergence of plastics and avoid the occurrence of convergence lines.
Color change without convergence lines in double-layer or multi-layer structures is achieved, color change efficiency and product stability are improved, and balanced plasticization of the die head and excellent product appearance are ensured.
Smart Images
Figure CN222309763U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of plastic processing, in particular to a double-layer double-dividing shuttle and a multi-layer diverting shuttle extrusion die head structure. Background Art
[0002] The existing traditional diversion shuttles are all single-channel and only make one layer, which does not completely solve the color change problem and mixed line problem of variable pressure or double-layer co-extrusion. Utility Model Content
[0003] The problem solved by the utility model is to provide a double-layer double-dividing shuttle and a multi-layer diverting shuttle extrusion die head structure, which solves the problem that the existing traditional diverting shuttles all have a single flow channel and only make one layer without completely solving the color change problem of variable pressure or double-layer co-extrusion and the technical problem of the mixing line.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] The double-layer double-dividing shuttle and multi-layer diverting shuttle extrusion die head structure includes an outer layer feed section, a diverting shuttle and a barrel. The diverting shuttle is installed at the bottom of the outer layer feed section, and the barrel is sleeved on the outer side of the diverting shuttle.
[0006] The diverter shuttle comprises an inner laminar flow rubber core, an outer core sleeve is sleeved on the outer side of the inner laminar flow rubber core, a sleeve is sleeved on the outer side of the outer core sleeve, and the sleeve is located between the outer material feeding section and the barrel, and a diverter cone is installed at the top of the inner laminar flow rubber core and inside the outer material feeding section;
[0007] A connected outer layer flow channel is arranged between the diverter cone and the outer layer material feeding section, inside the outer layer core sleeve, and between the outer layer core sleeve and the barrel; an inner layer flow channel is arranged between the inner layer flow rubber core and the outer layer core sleeve, and the inner layer flow channel is connected with the outer layer flow channel at the confluence section.
[0008] Preferably, an air intake rod is installed through the outer side of the outer core sleeve and the sleeve.
[0009] Preferably, an air inlet passage is provided in the middle of the inner laminar rubber core, and the air inlet passage is communicated with the air inlet rod.
[0010] Preferably, an outer layer feed inlet is provided on the outer layer feed section, and the outer layer feed inlet is communicated with the outer layer flow channel.
[0011] Preferably, an inner layer feed port is formed through the outer side of the outer layer core sleeve and the sleeve, and the inner layer feed port is communicated with the inner layer flow channel.
[0012] The utility model has the following beneficial effects: the outer layer flow shuttle structure is suitable for double-layer and multi-layer structures, and the outer layer flow shuttle structure has the advantage that there is no merging line after the two or more layers are merged, which solves the problem of the merging line on the bottle body, and the color changing time is fast and the efficiency is high;
[0013] The characteristics of the diverter shuttle are that the color changing block has no mixing line, the discharge flow channel has reduced pressure, the plasticization is better, the die head will not be eccentric, and the blank is more stable;
[0014] The multi-layer co-extrusion die head improves the fusion in the plastic products in terms of flow channel and product technology, and further ensures the appearance and stability of the products. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is the first cross-sectional view of the utility model;
[0016] Figure 2 This is the second cross-sectional view of the utility model.
[0017] Legend:
[0018] 1. Outer layer feed section; 2. Diverter shuttle; 3. Cylinder; 4. Outer layer feed port; 5. Inner layer flow rubber core; 6. Outer layer core sleeve; 7. Sleeve; 8. Diverter cone; 9. Inlet rod; 10. Inlet flow channel; 11. Inner layer feed port; 12. Outer layer flow channel; 13. Inner layer flow channel; 14. Converging section. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] Specific examples are given below.
[0021] See also Figure 1 and Figure 2 The double-layer double-shunt shuttle and multi-layer shunt shuttle extrusion die head structure includes an outer layer feed section 1, a shunt shuttle 2 and a barrel 3. The shunt shuttle 2 is installed at the bottom of the outer layer feed section 1, and the barrel 3 is set on the outer side of the shunt shuttle 2.
[0022] The flow-dividing shuttle 2 comprises an inner laminar flow rubber core 5, an outer layer core sleeve 6 is sleeved on the outer side of the inner laminar flow rubber core 5, a sleeve 7 is sleeved on the outer side of the outer layer core sleeve 6, and the sleeve 7 is located between the outer layer material feeding section 1 and the barrel 3, and a flow-dividing cone 8 is installed at the top of the inner laminar flow rubber core 5 and inside the outer layer material feeding section 1;
[0023] An outer layer flow channel 12 is provided between the flow dividing cone 8 and the outer layer feeding section 1, inside the outer layer core sleeve 6, and between the outer layer core sleeve 6 and the barrel 3. An inner layer flow channel 13 is provided between the inner layer flow rubber core 5 and the outer layer core sleeve 6. An outer layer feed port 4 is provided on the outer layer feeding section 1, and the outer layer feed port 4 is connected with the outer layer flow channel 12. The outer layer plastic enters the outer layer feeding section 1, is evenly distributed through the flow dividing cone 8, and is merged with other layers through the bottom end of the flow dividing shuttle 2. After molding, the product is not mixed in color, not strung, and there is no merging line on the bottle body;
[0024] The outer layer screw plastic flows to the outer layer feed port 4 and enters the outer layer flow channel 12. The inner layer feed port 11 is opened on the outer side of the outer layer core sleeve 6 and the sleeve 7, and the inner layer feed port 11 is connected with the inner layer flow channel 13. The inner layer screw plastic enters the inner layer flow channel 13 through the inner layer feed port 11, and the inner layer flow channel 13 is connected with the outer layer flow channel 12 at the confluence section 14. The plastics in the outer layer flow channel 12 and the inner layer flow channel 13 flow to the two-layer confluence section 14 and merge, and then flow to the mold for blow molding.
[0025] An air inlet rod 9 is installed through the outside of the outer core sleeve 6 and the sleeve 7, and an air inlet channel 10 is opened in the middle of the inner laminar rubber core 5, and the air inlet channel 10 is connected with the air inlet rod 9, so that air can be transported into the mouth mold cup core through the air inlet rod 9 and the air inlet channel 10 when the die head extrude the product.
[0026] This is used in the die head of the hollow equipment. The plastic enters the screw through the hopper and becomes molten after mixing. The outer screw plastic flows to the outer layer feed port 4 and enters the outer layer flow channel 12. The inner screw plastic passes through the inner layer feed port 11 and enters the inner layer flow channel 13 of the inner layer flow rubber core 5 in two parts. The plastics in the outer layer flow channel 12 and the inner layer flow channel 13 flow to the two-layer confluence section 14 and merge, and then flow to the mold for blow molding.
[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. Double-layer double-shunt shuttle and multi-layer shunt shuttle extrusion die head structure, characterized in that: It comprises an outer material feeding section (1), a diverting shuttle (2) and a barrel (3), wherein the diverting shuttle (2) is installed at the bottom of the outer material feeding section (1), and the barrel (3) is sleeved on the outer side of the diverting shuttle (2); The diverter shuttle (2) comprises an inner laminar flow rubber core (5), an outer core sleeve (6) is sleeved on the outer side of the inner laminar flow rubber core (5), a sleeve (7) is sleeved on the outer side of the outer core sleeve (6), and the sleeve (7) is located between the outer material inlet section (1) and the barrel (3), and a diverter cone (8) is installed at the top of the inner laminar flow rubber core (5) and inside the outer material inlet section (1); A communicating outer layer flow channel (12) is provided between the flow dividing cone (8) and the outer layer material inlet section (1), inside the outer layer core sleeve (6), and between the outer layer core sleeve (6) and the barrel (3); an inner layer flow channel (13) is provided between the inner layer flow rubber core (5) and the outer layer core sleeve (6), and the inner layer flow channel (13) is connected to the outer layer flow channel (12) at the confluence section (14).
2. The double-layer double-shunt shuttle and multi-layer shunt shuttle extrusion die structure according to claim 1 is characterized in that: An air intake rod (9) is installed through the outer side of the outer core sleeve (6) and the sleeve (7).
3. The double-layer double-shunt shuttle and multi-layer shunt shuttle extrusion die structure according to claim 2 is characterized in that: An air intake passage (10) is provided in the middle of the inner laminar rubber core (5), and the air intake passage (10) is communicated with the air intake rod (9).
4. The double-layer double-shunt shuttle and multi-layer shunt shuttle extrusion die structure according to claim 3 is characterized in that: An outer layer feed port (4) is provided on the outer layer feed section (1), and the outer layer feed port (4) is in communication with the outer layer flow channel (12).
5. The double-layer double-shunt shuttle and multi-layer shunt shuttle extrusion die structure according to claim 4, characterized in that: An inner layer feed port (11) is provided through the outer sides of the outer layer core sleeve (6) and the sleeve (7), and the inner layer feed port (11) is communicated with the inner layer flow channel (13).