CN218020052U

CN218020052U - Special screw rod for PMMA/GPPS diffusion plate

Info

Publication number: CN218020052U
Application number: CN202222412013.2U
Authority: CN
Inventors: 王海龙
Original assignee: Zhoushan Yuxin Machinery Co ltd
Current assignee: Zhoushan Yuxin Machinery Co ltd
Priority date: 2022-09-13
Filing date: 2022-09-13
Publication date: 2022-12-13
Anticipated expiration: 2032-09-13

Abstract

The utility model provides a special screw rod of PMMA GPPS diffuser plate has solved the problem with raw materials and light diffusant homogeneous mixing that current screw rod can not be fine. The body of rod is equipped with in proper order along the direction of feed and adds feed segment, first compression section, first measurement section, mixing section, exhaust section, second compression section and second measurement section, the second measurement section is equipped with at least two sets of pins, and adjacent pin is staggered arrangement around. The raw materials and the light diffusant are melted and then enter the mixing section to be mixed, then are compacted and melted again through the second compression section, the mixed materials are stirred through the pins, and the raw materials and the light diffusant are mixed again, so that the tissue components of the product are more uniform, and the product quality is improved.

Description

Special screw rod for PMMA/GPPS diffusion plate

Technical Field

The utility model relates to an extrusion equipment technical field, concretely relates to special screw rod of PMMA GPPS diffuser plate.

Background

The PMMA and GPPS diffusion plates have optical characteristics of certain haze, light transmittance, refractive index and the like, can effectively convert point or line light sources into soft and uniform surface light sources, have good light source dot matrix shielding performance on the premise of achieving good light transmittance, and are relatively more economical in price, so that the PMMA and GPPS diffusion plates are widely applied to lighting products.

The production process of the diffusion plate is to add plastic raw materials and light diffusant into a charging barrel, enable the mixed materials to become molten polymers through rotation of a screw rod in the charging barrel and heating of the charging barrel, then drive the mixed materials to move forwards through rotation of the screw rod, enable the mixed materials to be ejected from a nozzle at high pressure and high speed, inject the injected mixed materials into a closed die, and solidify the mixed materials into a required molded product after pressure maintaining and cooling. However, the mixing performance of the existing screw is poor, the raw materials and the light diffusant cannot be well mixed uniformly, and the quality of the product is affected.

SUMMERY OF THE UTILITY MODEL

For overcoming the not enough of background art, the utility model provides a special screw rod of PMMA GPPS diffuser plate has solved the problem with raw materials and light diffusant homogeneous mixing that current screw rod can not be fine.

The utility model adopts the technical scheme as follows:

PMMA/GPPS diffuser plate special screw rod, including the body of rod, the body of rod is equipped with in proper order along the direction of feed and adds material section, first compression section, first measurement section, mixing section, exhaust section, second compression section and second measurement section, second measurement section is equipped with at least two sets of pins, and adjacent pin is staggered arrangement around the front and back.

The number of each group of pins is 10, and the included angles of the pins which are circumferentially arranged and are arranged between every two adjacent pins are the same and are 28-28.5 degrees.

The space between the three groups of pins is equal to the thread pitch of the spiral rib on the second metering section.

The mixing section includes mixing section and No. two mixing sections, be equipped with the interval between mixing section and No. two mixing sections, the circumference equipartition of mixing section has a recess, no. two recesses that the circumference equipartition of mixing section of No. two has.

The width of the first groove is larger than that of the second groove.

And a second distance is formed between the second mixing section and the exhaust section.

And the top surfaces of the spiral edges on the rod bodies are provided with wear-resistant layers.

The utility model has the advantages that:

the raw materials and the light diffusant are melted and then enter the mixing section to be mixed, then the raw materials and the light diffusant are compacted and melted again through the second compression section, the mixed materials are stirred through the pins, the raw materials and the light diffusant are mixed again, the tissue components of the product are more uniform, and the product quality is improved.

Drawings

Fig. 1 is a schematic diagram of the present invention.

Fig. 2 is an enlarged schematic view of a in fig. 1 according to the present invention.

Fig. 3 is an enlarged schematic view of the present invention at B in fig. 1.

Fig. 4 is a schematic cross-sectional view of fig. 3 according to the present invention.

Fig. 5 is an enlarged schematic view of the present invention at D in fig. 3.

The rod body 1, add material section 2, first compression section 3, first measurement section 4, mixing section 5, mixing section 51, no. two mixing sections 52, a distance 53, a recess 54, no. two recesses 55, exhaust section 6, second compression section 7, second measurement section 8, pin 9, no. two distances 10, wearing layer 11.

Detailed Description

The invention will be further explained with reference to the following embodiments and drawings:

in an embodiment, as shown in fig. 1, fig. 2, and fig. 3, the screw dedicated for PMMA/GPPS diffusion plate includes a rod body 1, the rod body 1 is sequentially provided with a feeding section 2, a first compression section 3, a first metering section 4, a mixing section 5, an exhaust section 6, a second compression section 7, and a second metering section 8 along a feeding direction, the second metering section 8 is provided with at least two sets of pins 9, and front and rear adjacent pins 9 are arranged in a staggered manner. The raw materials and the light diffusant are melted and then enter the mixing section 5 to be mixed, then are compacted and melted again through the second compression section 7, the mixed materials are stirred through the pins 9, the raw materials and the light diffusant are mixed again, the texture components of the product are more uniform, and the product quality is improved.

In the embodiment, as shown in fig. 1, 3 and 4, each group of pins 9 is 10, and the included angles of adjacent pins 9 arranged in the circumferential direction are the same and are 28-28.5 degrees; the space between the three groups of pins 9 is equal to the pitch of the screw thread on the second metering section 8. Three groups of pins 9 are arranged between each screw pitch, the included angle between every two adjacent pins 9 is 28.182 degrees, the included angle between every two adjacent pins 9 and the screw edge is 53.18 degrees, and the raw materials and the light diffusant are fully stirred.

In the embodiment, as shown in fig. 1 and fig. 2, the mixing section 5 includes a first mixing section 51 and a second mixing section 52, a first gap 53 is provided between the first mixing section 51 and the second mixing section 52, first grooves 54 are uniformly distributed in the circumferential direction of the first mixing section 51, and second grooves 55 are uniformly distributed in the circumferential direction of the second mixing section 52. The melt enters a first mixing section 61 for primary shunting and stirring, then enters a first interval 53 for converging, and then enters a second mixing section 62 for secondary shunting and stirring, so that the raw materials and the light diffusant are uniformly mixed.

In an embodiment, as shown in fig. 2, the width of the first groove 54 is greater than the width of the second groove 55; and a second distance 10 is formed between the second mixing section 52 and the exhaust section 6. The melt enters the second groove 55 and is subdivided, and then flows into the second space 10 for confluence, so that the raw material and the light diffusant are mixed more uniformly.

In an embodiment, as shown in fig. 5, a wear-resistant layer 11 is disposed on a top surface of a screw ridge on the rod body 1. The wear-resistant layer 10 is an alloy layer, which can be a nickel-chromium alloy layer or a tungsten carbide alloy layer, so that the wear of the screw edge is reduced, and the service life of the screw is prolonged.

It is obvious that the above embodiments of the present invention are only examples for illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. There is no need or no way to give poor examples of all embodiments. And that such obvious changes and modifications are within the scope of the present invention as defined by the appended claims.

Claims

PMMA/GPPS diffuser plate special screw rod, including body of rod (1), its characterized in that: the body of rod (1) is equipped with in proper order along the direction of feed and adds feed segment (2), first compression section (3), first measurement section (4), mixing section (5), exhaust section (6), second compression section (7) and second measurement section (8), second measurement section (8) are equipped with at least two sets of pins (9), and adjacent pin (9) are staggered arrangement around.
2. The special screw for PMMA/GPPS diffuser plate of claim 1, which is characterized in that: the number of each group of pins (9) is 10, and the included angles of the pins (9) between adjacent pins which are arranged in the circumferential direction are the same and are 28-28.5 degrees.
3. The special screw for PMMA/GPPS diffuser plate of claim 1, which is characterized in that: the distance between the three groups of pins (9) is equal to the thread pitch of the thread on the second metering section (8).
4. The special screw for PMMA/GPPS diffuser plate of claim 1, which is characterized in that: mixing section (5) including a mixing section (51) and No. two mixing sections (52), be equipped with interval (53) between a mixing section (51) and No. two mixing sections (52), the circumference equipartition of a mixing section (51) has a recess (54), no. two recesses (55) that the circumference equipartition of No. two mixing sections (52) has.
5. A special screw for PMMA/GPPS diffuser plate according to claim 4, characterized in that: the width of the first groove (54) is larger than that of the second groove (55).
6. A special screw for PMMA/GPPS diffuser plate according to claim 4, characterized in that: and a second distance (10) is arranged between the second mixing section (52) and the exhaust section (6).
7. The PMMA/GPPS diffuser plate dedicated screw according to claim 1, wherein: the top surface of the screw ridge on the rod body (1) is provided with a wear-resistant layer (11).