Glue injection device

Abstract

The utility model relates to an injection molding machine, in particular to a glue injection device. Comprising an injection structure, a feeding structure and a supporting control structure, the feeding structure is located above the injection structure, and the supporting control structure is located below the injection structure; the injection structure comprises a machine barrel and a screw rod positioned in the machine barrel; the screw rod comprises a push rod, thread twisting pieces and stirring rings, the thread pitches of the thread twisting pieces are gradually reduced, and the multiple stirring rings are located among the thread twisting pieces; the feeding structure comprises a charging barrel, a spiral stirring rod and a wall hanging prevention device are arranged in the charging barrel, and the spiral stirring rod and the charging barrel are coaxially arranged. The glue injection device adopting the scheme has the advantages that toner and plastic particles are uniformly mixed, and the color of a product is stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding machine, concretely relates to a glue injection device. BACKGROUND

[0002] Injection molding machine is also called injection molding machine or injection machine, it is the main molding equipment of thermoplastic plastic or thermosetting material and is made into various shapes of plastic products by plastic molding die. Among them, injection system is one of the most important components of injection molding machine. Injection system generally has three main forms of plunger type, screw type, screw pre-plastic plunger injection type, and the most widely used is screw type. Its function is that in a cycle of injection molding machine, a certain amount of plastic is heated and plasticized in a specified time, and then the molten plastic is injected into the mold cavity through the screw under a certain pressure and speed. After injection, the molten material injected into the mold cavity is kept in shape.

[0003] The existing screw type injection system has the problem of uneven mixing of toner and plastic particles, which causes color difference in the same batch of products, and even different color blocks in the same product, which seriously affects the appearance and quality of the product. INVENTION CONTENTS

[0004] The utility model intends to provide a glue injection device, which can mix toner and plastic particles evenly and ensure stable product color.

[0005] The glue injection device in the scheme, including injection structure, feeding structure and support control structure, the feeding structure is located above the injection structure, and the support control structure is located below the injection structure. The injection structure includes a barrel and a screw located in the barrel, wherein the screw includes a push rod and a threaded sheet, and a stirring ring. The pitch of the threaded sheet gradually decreases, and the stirring ring is located between the threaded sheets. In order to avoid the stirring ring interfering with feeding, the stirring ring adopts a hollow ring structure, and the stirring ring can adopt shapes such as fan-shaped, trapezoidal, square and semicircular. The stirring ring can perform secondary stirring on particles and toner to prevent uneven heating and stirring caused by the threaded sheet. The feeding structure includes a barrel, and a screw-shaped stirring rod and a wall hanging prevention device are arranged in the barrel. The screw-shaped stirring rod is coaxially arranged with the barrel. With the rotation of the screw-shaped stirring rod, the wall hanging prevention device can continuously clean the toner adsorbed on the inner wall of the barrel to prevent color difference in the same batch of products.

[0006] The utility model has the advantages that: 1) the pitch of the threaded sheet gradually decreases, which can speed up the feeding speed. 2) the stirring ring is arranged between the threaded sheets, which can perform secondary stirring on particles and toner, mix toner and plastic particles evenly, and ensure stable product color. 3) the wall hanging prevention device cleans the toner on the inner wall of the barrel to ensure the proportion of plastic particles and toner and avoid different color blocks in the same product.

[0007] Further, the screw-shaped stirring rod is in an inverted conical structure, and the radius gradually decreases to adapt to the conical barrel.

[0008] Further, the wall-hanging prevention device comprises a support and a paintbrush, the middle part of the support is fixedly connected with the transmission shaft, and the two ends of the support are fixedly connected with the paintbrush; the paintbrush is in contact with the inner wall of the barrel.

[0009] Further, the paintbrush is shaped to adapt to the shape of the inner wall of the barrel, so that the color powder on the inner wall of the barrel is conveniently cleaned.

[0010] Further, a dust cover is further included, the dust cover can completely cover the feeding opening of the barrel to prevent color powder from flying during stirring.

[0011] Further, the stirring ring is in a fan shape, the stirring area is increased, and the mixing speed of the color powder and the plastic particles is accelerated.

[0012] Further, the arc-shaped end of the fan shape is in a wavy line structure, the mixing speed is further improved, and the particles and the color powder in a molten state are quickly and uniformly mixed. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 Fig. 1 is a structural schematic view of a glue injection device of the present application;

[0014] Figure 2 Fig. 2 is a partial sectional view of the glue injection device of the present application;

[0015] Figure 3 Fig. 3 is a schematic view of a feeding structure in the glue injection device of the present application;

[0016] Figure 4 Fig. 4 is a schematic view of another arrangement of a stirring ring in the glue injection device of the present application; Figure 2 Fig. 5 is an enlarged view of A in Fig. 4;

[0017] Figure 5 Fig. 6 is a schematic view of another arrangement of a stirring ring in the glue injection device of the present application.

[0018] In the figure, 1 is an injection structure, 1-1 is a machine cylinder, 1-2 is a screw rod, 1-21 is a push rod, 1-22 is a threaded flake, 1-23 is a stirring ring, 1-24 is an arc-shaped end, 1-3 is an injection oil pressure motor, 1-4 is an oil cylinder, 1-5 is a machine cylinder heating ring, 2 is a feeding structure, 2-1 is a barrel, 2-2 is a screw-shaped stirring rod, 2-3 is a wall-hanging prevention device, 2-31 is a support, 2-32 is a paintbrush, 2-4 is a dust cover, 2-5 is a transmission shaft, 3 is a support control structure, 3-1 is a support frame, and 3-2 is a hydraulic cylinder. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0020] according to Figure 1 and Figure 2 As shown, the injection device includes an injection structure 1, a feeding structure 2, and a support and control structure 3. The feeding structure 2 is located above the injection structure 1 and the two are connected. The support and control structure 3 is located below the injection structure 1 and is bolted to the injection structure 1.

[0021] like Figure 3 As shown, the feeding structure 2 includes a feed cylinder 2-1, inside which is a spiral stirring rod 2-2 coaxial with the feed cylinder 2-1 and an anti-wall-sticking device 2-3. The spiral stirring rod 2-2 is preferably an inverted conical structure, meaning its radius gradually decreases to fit the conical feed cylinder 2-1. The upper end of the spiral stirring rod 2-2 is engaged with the drive shaft 2-5 via a fixing seat. Preferably, there are two spiral stirring rods 2-2. The anti-wall-sticking device 2-3 includes a bracket 2-31 and a brush 2-32. The middle part of the bracket 2-31 is engaged with the drive shaft 2-5, and both ends of the bracket 2-31 are fixedly connected to the brush 2-32 with screws. The brush 2-32 contacts the inner wall of the feed cylinder 2-1. Preferably, the shape of the brush 2-32 is adapted to the inner wall of the feed cylinder 2-1 for better cleaning of the pigment powder adhering to the inner wall of the feed cylinder 2-1. The feed inlet of the barrel 2-1 is covered with a dust cover 2-4 to prevent the color powder from flying during stirring. The granules and color powder are mixed once in the barrel 2-1 by the spiral stirring rod 2-2, and the mixture of granules and color powder after the initial mixing enters the injection structure.

[0022] like Figure 2 As shown, the injection structure 1 includes a barrel 1-1, a screw 1-2 located inside the barrel 1-1, an injection hydraulic motor 1-3, and a hydraulic cylinder 1-4. A barrel heating coil 1-5 is wrapped around the outer wall of the barrel 1-1, which heats the mixture of particles and pigments entering the barrel 1-1. The injection hydraulic motor 1-3 drives the screw 1-2 to achieve feeding. Figure 4 As shown, the screw 1-2 includes a push rod 1-21, a threaded blade 1-22, and a stirring ring 1-23. Both the threaded blade 1-22 and the stirring ring 1-23 are welded and fixed to the push rod 1-21. The pitch of the threaded blade 1-22 gradually decreases, and as the push rod 1-21 rotates, the pressure of the threaded blade 1-22 on the material gradually increases, improving feeding efficiency. Multiple stirring rings 1-23 are located between the threaded blades 1-22. Preferably, the stirring ring 1-23 is fan-shaped, with the arc-shaped end 1-24 having a wavy structure to increase the stirring area. The stirring ring 1-23 can perform secondary stirring of the granules and color powder, further mixing the molten granules and color powder evenly, preventing uneven heating and uneven stirring. Figure 5As shown, the stirring ring 1-23 can also be arranged obliquely, and the oblique direction is the same as the spiral direction of the threaded flake 1-22, which is beneficial to reduce the feeding resistance.

[0023] The support control structure 3 comprises a support frame 3-1 and a hydraulic cylinder 3-2. The support frame 3-1 is controlled by the hydraulic cylinder 3-2 to move forward, backward, leftward and rightward, thereby driving the injection structure 1 to move, so that the injection structure 1 is aligned with the injection port of the mold.

[0024] The above is only an embodiment of the present application, and the well-known specific structures and properties in the scheme are not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application.

Claims

1. A glue injection device, comprising an injection structure, a feeding structure, and a support and control structure, wherein the feeding structure is located above the injection structure, and the support and control structure is located below the injection structure; the injection structure includes a barrel and a screw located within the barrel; the feeding structure includes a feed cylinder, characterized in that: The screw includes a push rod and threaded flanges with gradually decreasing pitches and a plurality of stirring rings located between the threaded flanges; the barrel is provided with a screw-shaped stirring rod and a wall-hanging prevention device, and the screw-shaped stirring rod is coaxially arranged with the barrel.

2. The apparatus of claim 1, wherein: The screw-shaped stirring rod is in an inverted conical structure.

3. The apparatus of claim 1 wherein: The wall-hanging prevention device includes a support and a paintbrush, the middle part of the support is fixedly connected with a transmission shaft, and the two ends of the support are fixedly connected with the paintbrush; the paintbrush is in contact with the inner wall of the barrel.

4. The apparatus of claim 3, wherein: The shape of the paintbrush is adapted to the inner wall of the barrel.

5. The apparatus of claim 1 wherein: A dustproof cover is further included, which can completely cover the feeding opening of the barrel.

6. The apparatus of claim 1 wherein: The stirring ring is in a fan shape.

7. The apparatus of claim 6, wherein: The arc-shaped end of the fan shape is in a wavy line structure.

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