Multi-layer composite injection molding device

Abstract

The utility model relates to the technical field of injection molding equipment, and discloses a multi-layer composite injection molding device. Comprising a multi-layer composite injection molding equipment body, one side of the outer wall of the multi-layer composite injection molding equipment body is fixedly connected with a hopper, the top of the hopper is fixedly connected with a screening box, the screening box communicates with the interior of the hopper, and an auxiliary screening mechanism is arranged in the screening box; the auxiliary screening mechanism comprises four guide rods which are distributed in a rectangular mode, evenly and fixedly connected to the inner wall of the bottom of the screening box, a supporting disc is arranged in the bottom end of the screening box, the peripheral frame of the supporting disc is slidably connected with the four guide rods, and the top of the buffering piece is fixedly connected with the bottom of the supporting disc. The bottom of the buffering piece is fixedly connected with the inner wall of the bottom of the screening box, and a filtering cap is fixedly connected to the middle of the top of the supporting disc. Light plastic particles can be thrown up through vibration, the adhesion probability of the plastic particles can be reduced, and then the feeding speed and quality of the plastic particles are improved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding equipment technology, and more specifically, to a multi-layer composite injection molding device. Background Technology

[0002] Multilayer composite injection molding equipment can manufacture products with superior functionality and appearance by injecting plastics of different materials or colors in layers. It has wide applications in packaging, automobiles, home appliances and daily necessities. By optimizing equipment selection, parameter control and mold design, problems such as poor interlayer adhesion and uneven layering can be effectively solved.

[0003] When using multi-layer composite injection molding equipment, plastic granules need to be added to the hopper first. The uneven size and shape of the plastic granules can easily cause blockages in the feed and discharge. In severe cases, the feeding will be discontinuous, leading to production interruption. At the same time, large granules require a longer melting time, while small granules will overheat, which will result in defects such as bubbles and black spots in the injection molded products, thus reducing the quality of the injection molded products. Utility Model Content

[0004] The purpose of this invention is to provide a multi-layer composite injection molding device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides a multi-layer composite injection molding device, including a multi-layer composite injection molding equipment body. A hopper is fixedly connected to one side of the outer wall of the multi-layer composite injection molding equipment body. A screening box is fixedly connected to the top of the hopper. The screening box communicates with the interior of the hopper. An auxiliary screening mechanism is provided inside the screening box. The auxiliary screening mechanism includes four guide rods that are evenly and rectangularly distributed and fixedly connected to the inner wall of the bottom of the screening box. A support plate is provided inside the bottom of the screening box. The four sides of the support plate are slidably connected to the four guide rods. A buffer is sleeved on the outer wall of each of the four guide rods. The top of the buffer is fixedly connected to the bottom of the support plate, and the bottom of the buffer is fixedly connected to the inner wall of the bottom of the screening box. A filter cap is fixedly connected to the middle of the top of the support plate. A baffle is fixedly connected to the top of the support plate and outside the filter cap. Rectangular plates are symmetrically fixedly connected to the outer walls on both sides of the support plate.

[0006] As a further improvement to this technical solution, the outer contour of the filter cap is frustum-shaped, the filter cap as a whole is narrower at the top and wider at the bottom, and the opening of the enclosure is wider at the top and narrower at the bottom.

[0007] As a further improvement to this technical solution, square grooves are provided on the bottom sidewalls of both sides of the screening box, and the ends of the rectangular plates away from the support plate are slidably connected to the inside of the square grooves. Control rods are symmetrically fixedly connected to the top of the two rectangular plates and located on the outside of the screening box.

[0008] As a further improvement to this technical solution, a bellows is fixedly connected to the outer wall of the bottom of the screening box, and a piston rod is slidably connected through the bellows. The top of the piston rod is fixedly connected to the bottom of the control rod. The bellows is connected to the inside of the enclosure through a pipe. Several through holes are evenly distributed in a ring on the inner wall of the enclosure.

[0009] As a further improvement to this technical solution, an electric push rod is fixedly connected to the outer wall of the top end of the screening box away from the air box and above the control rod, and a pressure block is fixedly connected to the extended end of the electric push rod.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] In this multi-layer composite injection molding device, an auxiliary screening mechanism is set up to screen the plastic particles by using a filter cap with a narrow top and wide bottom. This ensures that the size of the screened plastic particles remains uniform, preventing larger plastic particles from affecting the injection molding quality. At the same time, the support plate and filter cap vibrate, which prevents the mesh from clogging during the filtration of plastic particles. The vibration also throws lighter plastic particles up, which helps reduce the probability of plastic particles sticking together, thereby improving the feeding speed and quality of plastic particles. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a three-dimensional structural diagram of the relevant components of the hopper of the utility model;

[0014] Figure 3 This is a three-dimensional side view of the relevant components of the screening box of the utility model;

[0015] Figure 4 This is a three-dimensional sectional view of the relevant components of the screening box of the utility model.

[0016] The meanings of the labels in the diagram are as follows:

[0017] 1. Multi-layer composite injection molding equipment body; 2. Hopper; 3. Screening box; 31. Square trough; 32. Air box; 4. Auxiliary screening mechanism; 41. Guide rod; 42. Support plate; 43. Buffer component; 44. Filter cap; 45. Enclosure; 46. Rectangular plate; 51. Control rod; 52. Piston rod; 53. Through hole; 61. Electric push rod; 62. Pressure block. Detailed Implementation

[0018] 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.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Example 1

[0021] Please see Figures 1-4As shown, this embodiment provides a multi-layer composite injection molding device, including a multi-layer composite injection molding equipment body 1. A hopper 2 is fixedly connected to one side of the outer wall of the multi-layer composite injection molding equipment body 1. A sieve box 3 is fixedly connected to the top of the hopper 2. The sieve box 3 communicates with the inside of the hopper 2. By adding plastic particles inside the sieve box 3, the plastic particles are filtered and enter the inside of the hopper 2, facilitating subsequent injection molding of the multi-layer composite injection molding equipment body 1. An auxiliary sieve mechanism 4 is provided inside the sieve box 3. The auxiliary sieve mechanism 4 includes four guide rods 41 that are evenly fixedly connected to the bottom inner wall of the sieve box 3 in a rectangular distribution. A support plate 42 is provided inside the bottom of the sieve box 3. The four sides of the support plate 42 are slidably connected to the four guide rods 41. A buffer member 43 is sleeved on the outer wall of each of the four guide rods 41. The top of the buffer member 43 is fixedly connected to the bottom of the support plate 42, and the bottom of the buffer member 43 is fixedly connected to the bottom inner wall of the sieve box 3. The filter cap 44 is fixedly connected to the top center of the support plate 42. A baffle 45 is fixedly connected to the top of the support plate 42 and outside the filter cap 44. Rectangular plates 46 are symmetrically fixedly connected to the outer walls of both sides of the support plate 42. The outer contour of the filter cap 44 is frustum-shaped. The filter cap 44 is narrower at the top and wider at the bottom. The opening of the baffle 45 is wider at the top and narrower at the bottom. The plastic particles entering the screening box 3 will first fall onto the surface of the filter cap 44 and roll from the narrow end to the wide end. The long inclined surface of the filter cap 44 can prolong the sliding time of the plastic particles, so that the plastic particles that meet the mesh diameter of the filter cap 44 will fall directly into the hopper 2, while the plastic particles with larger diameters that do not meet the size will fall to the bottom area of ​​the filter cap 44. This completes the screening of the plastic particles by size, so that the size of the screened plastic particles remains uniform and avoids the impact of larger plastic particles on the injection molding quality.

[0022] In addition, the enclosure 45 serves to shield and gather plastic particles as they roll off the outer wall of the filter cap 44, preventing them from falling outside the bottom of the filter cap 44. The enclosure 45 is also detachable, allowing for periodic removal and cleaning of large-diameter plastic particles from the screening box 3. When the control rod 51 is pressed down by the electric push rod 61 and the pressure block 62, it simultaneously presses down on the rectangular plate 46, causing the support plate 42 to slide downwards on the outer wall of the four guide rods 41, while simultaneously squeezing the buffer 43. Since the buffer 43 is composed of springs and limiting components, after the pressure block 62 separates from the control rod 51, the control rod 51 resets under the rebound of the buffer 43. This process repeats, causing the support plate 42 and filter cap 44 to vibrate, thus preventing mesh blockage during plastic particle filtration. The vibration also throws lighter plastic particles up, reducing the probability of particle adhesion and improving the feeding speed and quality of the plastic particles.

[0023] Square grooves 31 are provided on the bottom sidewalls of both sides of the screening box 3. The ends of the rectangular plates 46 away from the support plate 42 are slidably connected to the inside of the square grooves 31. The square grooves 31 allow the rectangular plates 46 to slide up and down inside them, which serves to limit the position of the rectangular plates 46. Control rods 51 are symmetrically and fixedly connected to the top of the two rectangular plates 46 and located on the outside of the screening box 3. A bellows 32 is fixedly connected to the bottom outer wall of the screening box 3. A piston rod 52 is slidably connected through the bellows 32. The top of the piston rod 52 is fixedly connected to the bottom of the control rod 51. The bellows 32 is connected to the inside of the enclosure 45 through a pipe. Several through holes 53 are evenly distributed in a ring on the inner wall of the enclosure 45. The top outer wall of the end of the screening box 3 away from the bellows 32 and located on the control rod 51 is connected to the control rod 51. An electric push rod 61 is fixedly connected to the top of the control rod 51. A pressure block 62 is fixedly connected to the extended end of the electric push rod 61. The electric push rod 61 is activated by a button, causing the extended end of the electric push rod 61 to move towards the top of the control rod 51 along with the pressure block 62. When the bottom of the pressure block 62 contacts the top of the control rod 51, continuous downward pressure causes the control rod 51 to slide downward inside the air box 32 along with the piston rod 52. This causes the internal space of the air box 32 to gradually decrease under the compression of the piston rod 52, while air is generated and discharged into the interior of the enclosure 45 through the pipe. Subsequently, the air is discharged through the through hole 53, which blows the plastic particles deposited at the bottom of the filter cap 44, causing the lighter plastic particles to be turned over, preventing blockage and improving filtration efficiency.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-layer composite injection molding device, comprising a multi-layer composite injection molding device body (1), one side of the outer wall of the multi-layer composite injection molding device body (1) is fixedly connected with a hopper (2), characterized in that: The hopper (2) top fixedly connected with sieve box (3), the sieve box (3) with hopper (2) internal communication, the sieve box (3) inside is provided with auxiliary sieve mechanism (4), the auxiliary sieve mechanism (4) includes four guide rods (41) that are evenly fixedly connected to the bottom inner wall of the sieve box (3) according to rectangular distribution, the sieve box (3) bottom end inside is provided with support disc (42), the support disc (42) periphery frame is slidably connected with four guide rods (41), four the outer wall of guide rod (41) is sleeved with buffer (43), the buffer (43) top and support disc (42) bottom fixedly connected, the buffer (43) bottom and sieve box (3) bottom inner wall fixedly connected, the support disc (42) top middle part is fixedly connected with filter cap (44), the support disc (42) top and located filter cap (44) outside fixedly connected with fence (45), the support disc (42) both sides outer wall is fixedly connected with rectangular plate (46) symmetrically.

2. The multi-layer composite injection molding apparatus of claim 1, wherein: The filter cap (44) is in the shape of a circular truncated cone, the filter cap (44) is narrow at the top and wide at the bottom, and the fence (45) is wide at the top and narrow at the bottom.

3. The multi-layer composite injection molding apparatus of claim 1, wherein: The side wall of the bottom end of the sieve box (3) is provided with a square groove (31), one end of the rectangular plate (46) away from the support disc (42) is slidably connected in the square groove (31), and the top of the two rectangular plates (46) and located outside the sieve box (3) is fixedly connected with a control rod (51) symmetrically.

4. The multi-layer composite injection molding apparatus of claim 1, wherein: The bottom end outer wall of the sieve box (3) is fixedly connected with a wind box (32), the piston rod (52) is slidably connected in the wind box (32), the top of the piston rod (52) is fixedly connected with the bottom of the control rod (51), the wind box (32) is communicated with the inside of the fence (45) through a pipeline, and a plurality of through holes (53) are uniformly formed in the inner wall of the fence (45) in the form of a ring.

5. The multi-layer composite injection molding apparatus of claim 4, wherein: The top outer wall of the end of the sieve box (3) away from the wind box (32) and located above the control rod (51) is fixedly connected with an electric push rod (61), and the elongated end of the electric push rod (61) is fixedly connected with a pressing block (62).

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