Injection molding material of high-flow PBT (Polybutylece Terephthalate)

Abstract

The utility model belongs to the technical field of high-flow PBT (polybutylene terephthalate) injection molding materials, and discloses a high-flow PBT injection molding material which comprises a heating tank, the top end of the heating tank is fixedly connected with a feed port and a motor, the output end of the motor is rotatably connected with a rotating rod, the outer side of the rotating rod is sleeved with an extension rod, and the extension rod is fixedly connected with the feed port. The bottom end of the extension rod is fixedly connected with a scraping plate, the outer side of the rotating rod is rotatably connected with a bearing disc, a heating wire is attached to the top end of the bearing disc, the scraping plate is rotatably connected to the outer side of the bearing disc, and a plurality of sets of round hole grooves are formed in the outer side of the bearing disc. The PBT material is easy to hydrolyze at high temperature and is not dried before processing, so that the liquidity of the PBT material is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of injection molding materials and equipment related to high-flow PBT, specifically an injection molding material of high-flow PBT. Background Technology

[0002] Polybutylene terephthalate (PBT) is a crystalline linear saturated polyester resin that is easy to process and mold, with excellent flowability, heat resistance, and weather resistance. Its advantages include rigidity that is not affected by temperature and low deformation. It is widely used in automotive parts, electronics, machinery, and household products.

[0003] Meanwhile, the patent application number 202220107854.X discloses a high-toughness and high-rigidity reinforced PBT screening device, including a base, a screen box, an elastic seat, a screen mesh, a vibrating motor, and a stirring rod; one end of the base is fixedly connected to the ground, and the other end of the base abuts against the elastic seat. The end of the elastic seat away from the base is connected to the screen box to elastically support the screen box. The screen box is set at an inclination and has an inlet on the side facing away from the base at its higher inclination and an outlet on the side facing the base at its lower inclination. The screen mesh is installed in the screen box and isolates the space between the inlet and outlet. The screen mesh is set parallel to the inclination direction of the screen box. The vibrating motor is installed on the screen box, and a stirring rod is set on the end of the screen box facing away from the outlet.

[0004] However, during the implementation of the relevant technology, it was found that the above-mentioned high-toughness and high-rigidity reinforced PBT material device has the following drawbacks: due to the characteristics of PBT injection molding material, the heat distortion temperature is relatively low, and PBT material is prone to hydrolysis at high temperatures. Since it was not dried before processing, its size may change after absorbing moisture, reducing the flowability of PBT material. Utility Model Content

[0005] To address the problems mentioned in the background art, this utility model provides a high-flow PBT injection molding material, which improves the flowability of PBT injection molding material through heating, enabling it to quickly fill the mold during the injection molding process. It is especially suitable for molding thin-walled and complex-shaped products, which can improve production efficiency, help shorten the molding cycle, and reduce production costs.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-flow PBT injection molding material, comprising a heating tank, a feed port fixedly connected to the top of the heating tank, a motor fixedly connected to the top of the heating tank, a rotating rod rotatably connected to the output end of the motor, an extension rod sleeved on the outer side of the rotating rod, a scraper fixedly connected to the bottom end of the extension rod, a support plate rotatably connected to the outer side of the rotating rod, a heating wire attached to the top of the support plate, the scraper rotatably connected to the outer side of the support plate, and several sets of circular slots formed on the outer side of the support plate.

[0007] Preferably, a retaining rod is sleeved on the outer side of the rotating rod, a protrusion is fixedly connected to the top of the retaining rod, a spring is fixedly connected to the bottom of the bearing plate, a rotating wheel is rotatably connected inside the bottom of the spring, and the rotating wheel is slidably connected to the top of the protrusion.

[0008] Preferably, the heating tank has an internal cavity, the support plate is disposed inside the cavity of the heating tank, an air suction pipe is fixedly connected inside the cavity of the heating tank, and an air suction head is fixedly connected to the outside of the air suction pipe.

[0009] Preferably, a base is fixedly connected inside the cavity of the heating tank, a lead screw is rotatably connected inside the base, and a fixing plate is sleeved on the outside of the lead screw.

[0010] Preferably, the fixing plate has a circular slot inside, a connecting rod is fixedly connected inside the circular slot of the fixing plate, a temperature detector is fixedly connected to the bottom end of the connecting rod, PBT material is attached to the top of the bearing plate, and the temperature detector is located on the top of the PBT material.

[0011] Preferably, the fixing plate, connecting rod and temperature detector are provided in three sets and are evenly arranged on the outside of the lead screw.

[0012] Preferably, the support plate is provided in three sets and is evenly distributed inside the cavity of the heating tank.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model involves pouring PBT material into the interior of a heating tank, where heating wires at the top of the support plate heat and dry the PBT material, preventing moisture from affecting the product's precision and dimensional stability. During use, repeated tumbling heats the PBT material at the bottom, improving its flowability. This improved flowability helps shorten the molding cycle.

[0015] 2. This utility model adds an air suction device inside the heating tank to remove the moisture generated during the heating process, thus preventing changes in size that may affect the product's accuracy and dimensional stability after it becomes damp. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the lead screw structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the heating wire structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the PBT material structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the heating tank structure of this utility model.

[0021] In the diagram: 1. Heating tank; 2. Motor; 3. Feed inlet; 4. Rotating rod; 5. Support plate; 6. Pressing rod; 7. Protrusion; 8. Rotating wheel; 9. Spring; 10. Extension rod; 11. Heating wire; 12. Base; 13. Lead screw; 14. Fixing plate; 15. Connecting rod; 16. Temperature detector; 17. Suction pipe; 18. Suction head; 19. Scraper; 20. PBT material. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 5 As shown, this utility model provides a high-flow PBT injection molding material, including a heating tank 1. A feed port 3 is fixedly connected to the top of the heating tank 1, and a motor 2 is fixedly connected to the top of the heating tank 1. A rotating rod 4 is rotatably connected to the output end of the motor 2. The motor 2 drives the rotating rod 4 to rotate. The heating wire 11 attached to the top of the support plate 5 heats the PBT material 20. During the heating process, the rotating rod 4 drives the scraper 19 at the bottom of the extension rod 10 sleeved on the outside to flip the PBT material 20, so that the PBT material 20 is fully heated, and the heated PBT material 20 is discharged from the inside of the round hole groove at the top of the support plate 5.

[0024] Specifically, a clamping rod 6 is sleeved on the outer side of the rotating rod 4, and a protrusion 7 is fixedly connected to the top of the clamping rod 6. A spring 9 is fixedly connected to the bottom of the bearing plate 5, and a rotating wheel 8 is rotatably connected inside the bottom of the spring 9. The protrusion 7 at the top of the clamping rod 6 pushes the rotating wheel 8 at the bottom of the spring 9 at the bottom of the bearing plate 5 to rotate. At this time, the rotating wheel 8 and the protrusion 7 will press against each other, squeezing the spring 9 to slide towards the bearing plate 5, knocking on the bearing plate 5, and agitating the PBT material 20 at the top of the bearing plate 5.

[0025] Furthermore, the support plate 5 is set inside the cavity of the heating tank 1. During the heating process, the moisture generated during heating is adsorbed by the suction head 18 on the outside of the suction pipe 17, which reduces the possibility that the size of the high-flow PBT material 20 may change after absorbing moisture.

[0026] Furthermore, the base 12 drives the lead screw 13 to rotate, and the lead screw 13 drives the outer fixing plate 14 to slide towards the top.

[0027] It is worth noting that the fixing plate 14 inserts the temperature detector 16 at the bottom of the connecting rod 15 into the interior of the PBT material 20 to detect the temperature inside the PBT material 20. Once the appropriate temperature is reached, the heating wire 11 stops heating, and the PBT material 20 can be poured out from the interior of the heating tank 1.

[0028] It is worth noting that there are three sets of fixed plate 14, connecting rod 15 and temperature detector 16, which are evenly arranged on the outside of lead screw 13. By setting multiple sets of temperature detectors 16, the detection accuracy of multiple sets of PBT material 20 can be improved, which facilitates the improvement of the good flowability of PBT material 20.

[0029] It is worth mentioning that by setting multiple sets of bearing plates 5 and evenly distributing them inside the cavity of the heating tank 1, it is easier to heat the PBT material 20.

[0030] Among them, motor 2 is existing technology and will not be described in detail; at the same time, this utility model also includes a power supply, controller and switch, etc., which are not the main technical points of this patent and will not be described in detail; the "front, back, left and right" perspectives of this device are as follows: Figure 1 The direction shown in the diagram is the reference.

[0031] Working principle:

[0032] First, the staff adds PBT material into the feed inlet 3 at the top of the heating tank 1. The motor 2 drives the rotating rod 4 to rotate. The heating wire 11 attached to the top of the bearing plate 5 heats the PBT material 20. During the heating process, the rotating rod 4 drives the scraper 19 at the bottom of the extension rod 10 on the outside to flip the PBT material 20, so that the PBT material 20 is heated fully and water stains are avoided inside the PBT material 20. During the heating process, the moisture generated during heating is absorbed through the suction head 18 on the outside of the suction pipe 17.

[0033] After heating for a period of time, the rotating rod 4 drives the outer sleeved clamping rod 6 to rotate. The protrusion 7 at the top of the clamping rod 6 pushes up the rotating wheel 8 at the bottom of the spring 9 at the bottom of the bearing plate 5 to rotate. At this time, the rotating wheel 8 and the protrusion 7 will press together, squeezing the spring 9 to slide towards the bearing plate 5, knocking the bearing plate 5 and agitating the PBT material 20 at the top of the bearing plate 5, so as to better heat the PBT material 20 evenly. Then the motor 2 stops rotating, the base 12 drives the lead screw 13 to rotate, and the lead screw 13 drives the outer fixing plate 14 to slide towards the top. The fixing plate 14 inserts the temperature detector 16 at the bottom of the connecting rod 15 into the interior of the PBT material 20 to detect the temperature inside the PBT material 20. After the appropriate temperature is reached, the heating wire 11 stops heating, and the PBT material 20 can be poured out from the interior of the heating tank 1.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-flow PBT injection molding material, comprising a heating tank (1), characterized in that: The top of the heating tank (1) is fixedly connected to a feed inlet (3), and the top of the heating tank (1) is fixedly connected to a motor (2). The output end of the motor (2) is rotatably connected to a rotating rod (4). An extension rod (10) is sleeved on the outside of the rotating rod (4). A scraper (19) is fixedly connected to the bottom end of the extension rod (10). A bearing plate (5) is rotatably connected to the outside of the rotating rod (4). A heating wire (11) is attached to the top of the bearing plate (5). The scraper (19) is rotatably connected to the outside of the bearing plate (5). Several sets of circular holes and grooves are opened on the outside of the bearing plate (5).

2. The injection molding material of high-flow PBT according to claim 1, characterized in that: A clamping rod (6) is sleeved on the outside of the rotating rod (4). A protrusion (7) is fixedly connected to the top of the clamping rod (6). A spring (9) is fixedly connected to the bottom of the bearing plate (5). A rotating wheel (8) is rotatably connected inside the bottom of the spring (9). The rotating wheel (8) is slidably connected to the top of the protrusion (7).

3. The injection molding material of high-flow PBT according to claim 1, characterized in that: The heating tank (1) has an internal cavity, and the bearing plate (5) is set inside the cavity of the heating tank (1). A suction pipe (17) is fixedly connected inside the cavity of the heating tank (1), and a suction head (18) is fixedly connected to the outside of the suction pipe (17).

4. The injection molding material of high-flow PBT according to claim 3, characterized in that: A base (12) is fixedly connected inside the cavity of the heating tank (1), and a lead screw (13) is rotatably connected inside the base (12). A fixing plate (14) is sleeved on the outside of the lead screw (13).

5. The injection molding material of high-flow PBT according to claim 4, characterized in that: The fixing plate (14) has a circular slot inside, and a connecting rod (15) is fixedly connected inside the circular slot of the fixing plate (14). A temperature detector (16) is fixedly connected to the bottom end of the connecting rod (15). PBT material (20) is attached to the top of the bearing plate (5), and the temperature detector (16) is set on the top of the PBT material (20).

6. The injection molding material of high-flow PBT according to claim 5, characterized in that: The fixing plate (14), connecting rod (15) and temperature detector (16) are provided in three sets and are evenly arranged on the outside of the lead screw (13).

7. The injection molding material of high-flow PBT according to claim 3, characterized in that: The support plate (5) is provided in three sets and is evenly arranged inside the cavity of the heating tank (1).

Images