CN104552772B - Precise material mixing device for injection molding machine - Google Patents

Abstract

The invention discloses a precision mixing device for an injection molding machine, comprising a mixing bin, a feeding bin is arranged above the mixing bin, the feeding bin includes a new material feeding bin and an old material feeding bin, and the top of the feeding bin is provided with a The new material inlet and the old material inlet, the new material hopper is set above the new material inlet, the old material hopper is installed above the old material inlet, and the bin board is set between the mixing bin and the feeding bin , A through hole and B through hole are set on the compartment board, A baffle plate and A quantitative plate are set in the new material feed bin, A quantitative hole is set on the A quantitative plate, and the old material feed bin moves A second baffle plate and a second quantitative plate are provided, and a second quantitative hole is arranged on the second quantitative plate. Compared with the prior art, the invention has a simple structure and low manufacturing cost, can add a certain amount of recovered waste materials to the virgin materials, maximizes the resource utilization efficiency, and the ratio of the virgin materials and the waste materials can be adjusted.

Description

A precision mixing device for an injection molding machine

technical field

The invention belongs to the field of injection molding machine equipment, and in particular relates to a precision mixing device for an injection molding machine.

Background technique

Injection molding machine is also known as injection molding machine or injection machine. It is the main molding equipment for making thermoplastics or thermosetting plastics into various shapes of plastic products using plastic molding molds. Divided into vertical, horizontal, all-electric. The injection molding machine heats the plastic, applies high pressure to the molten plastic, and makes it shoot out to fill the mold cavity.

The working principle of the injection molding machine is similar to the syringe used for injection. It uses the thrust of the screw (or plunger) to inject the plastic that has been plasticized into the molten state (that is, the viscous flow state) into the closed cavity. The process of obtaining products after curing and setting.

Injection molding is a cyclic process, and each cycle mainly includes: quantitative feeding—melt plasticization—pressure injection—mold filling and cooling—mold opening and pick-up. After taking out the plastic parts, the mold is closed again, and the next cycle is carried out.

Injection molding machine operation items: Injection molding machine operation items include three aspects: control keyboard operation, electrical control system operation and hydraulic system operation. Carry out the injection process action, feeding action, injection pressure, injection speed, selection of ejection type, temperature monitoring of each section of the barrel, adjustment of injection pressure and back pressure, etc.

The molding process of the general screw injection molding machine is: firstly, the granular or powdery plastic is added into the barrel, and the plastic is melted through the rotation of the screw and the outer wall of the barrel is heated, and then the machine is closed and the injection seat is moved forward. Make the nozzle close to the sprue of the mold, and then feed the pressure oil into the injection cylinder to push the screw forward, so that the molten material is injected into the closed mold with a lower temperature at a high pressure and at a faster speed. Keep time and pressure (also known as holding pressure), cool it, make it solidify and form, and then open the mold and take out the product (the purpose of holding pressure is to prevent the backflow of the molten material in the mold cavity, replenish materials into the mold cavity, and ensure that the product with certain density and dimensional tolerances). The basic requirements of injection molding are plasticization, injection and molding. Plasticization is the prerequisite to realize and guarantee the quality of molded products, and in order to meet the requirements of molding, injection must ensure sufficient pressure and speed. At the same time, due to the high injection pressure, a correspondingly high pressure is generated in the mold cavity (the average pressure in the mold cavity is generally between 20~45MPa), so there must be a large enough clamping force. It can be seen that the injection device and the clamping device are the key components of the injection molding machine.

At present, domestic enterprises respond to the country's call for energy conservation and emission reduction. In order to save resources and reduce costs, they will add recycled waste and used plastics to new materials. After melting and mixing, they will be reused as raw materials. Although this can save raw materials, these waste materials and used plastics will be mixed with some impurities, which will seriously affect the quality of the product and even damage the injection molding machine. Moreover, in order to ensure the quality of the product, the mixing ratio of these waste materials and new materials has specific numerical requirements and cannot exceed the standard. If it exceeds the standard, the raw materials cannot meet the standard, which will make the quality of the product unqualified.

At present, enterprises solve the mixing ratio of waste materials and new materials, as long as they are weighed, then mixed, melted and mixed. Although this method is simple and does not require an increase in cost, it is cumbersome to operate, and it needs to be weighed every time the raw material is added into the injection molding machine, which is very troublesome and time-consuming.

Contents of the invention

Aiming at the deficiencies in the prior art, the present invention provides a precision mixing device for injection molding machines, which can add a certain amount of recovered waste materials to the new materials, maximize the efficiency of resource use, and the ratio of new materials and waste materials can be adjusted .

In order to solve the above technical problems, the present invention is solved by the following technical solutions: a precision mixing device for injection molding machines, including a mixing bin, above which a feeding bin is arranged, and the feeding bin includes new materials A feed bin and an old material feed bin, the top of the feed bin is provided with a new material inlet and an old material inlet, a new material hopper is arranged above the new material inlet, and the old material feed There is an old material hopper above the mouth, a sub-bin plate is set between the mixing bin and the feeding bin, and a through-hole and a second through-hole are set on the sub-bin board, and the new material feeds into the bin. A material baffle plate and a quantitative plate are provided, and the A quantitative plate is provided with a quantitative hole, and a second material baffle plate and a second quantitative plate are arranged movablely in the old material feeding bin, and the second quantitative plate is provided with There is a second quantitative hole, the new material inlet, the first quantitative hole and the first through hole communicate with the new material hopper and the mixing bin, the old material inlet, the second The quantitative hole and the second through hole communicate the old material hopper with the mixing bin.

In the above technical solution, preferably, the diameter values of the A through hole, the new material feed port and the A quantitative hole decrease successively, and the B through hole, the old material feed port and the The diameter values of quantitative hole B decrease successively.

In the above technical solution, preferably, a handle of the first quantitative plate is provided under the end of the first quantitative plate located outside the fresh material feeding bin.

In the above technical solution, preferably, a second quantitative plate handle is provided under the end of the second quantitative plate located outside the used material feed bin.

In the above technical solution, preferably, a material blocking handle is provided above the end of the A material blocking plate located outside the fresh material feeding bin.

In the above technical solution, preferably, the second material blocking plate is provided with a second material blocking handle above the end outside the used material feeding bin.

In the above technical solution, preferably, a stirring rod is arranged in rotation in the mixing bin, a plurality of stirring blades are arranged on the stirring rod, a mixing outlet is arranged at the bottom of the mixing bin, and a mixing outlet is arranged on the mixing outlet A door panel is provided for rotation, and two heating parts are arranged at the bottom of the mixing bin on both sides of the mixing outlet.

The invention has a simple structure and low manufacturing cost, can add a certain amount of recycled waste materials to the virgin materials, maximizes the resource utilization efficiency, and the ratio of the virgin materials to the waste materials can be adjusted.

Description of drawings

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

Fig. 2 is a structural schematic diagram of a movable baffle of the present invention.

Fig. 3 is the structure diagram of movable baffle plate B of the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments: As shown in Figures 1 to 3, a precision mixing device for an injection molding machine includes a mixing bin 1, and a feeding material is arranged above the mixing bin 1 The feed bin includes a new feed bin and an old feed bin, the top of the feed bin is provided with a new feed inlet 71 and an old feed inlet 61, and the new feed inlet 71 A new material hopper 7 is arranged on the top, an old material hopper 6 is arranged above the old material inlet 61, a sub-bin plate 15 is arranged between the mixing bin 1 and the feeding bin, and on the sub-bin board 15 A through hole 151 and a second through hole 152 are provided. A material baffle plate 3 and a quantitative plate 5 are movable in the new material feeding bin. The first quantitative plate 5 is provided with a quantitative hole 51. Second material baffle plate 2 and second quantitative plate 4 are arranged movablely in the old material feeding bin, and second quantitative hole 41 is arranged on the second quantitative plate 4, and described new material feed opening 71, described first quantitative hole 51 and The first through hole 151 communicates the new material hopper 7 with the mixing bin 1, and the old material inlet 61, the second quantitative hole 41 and the second through hole 152 connect the old material The hopper 6 communicates with the mixing bin 1 .

The diameter values of the first through hole 151, the new material feed port 71 and the first quantitative hole 51 decrease successively, and the second through hole 152, the old material feed port 61 and the second quantitative hole The diameter values of 41 decrease successively. Arranged like this, the quantity of the new material that falls in the mixing bin 1 just relies on first quantitative hole 51 to control completely;

The first quantitative plate 5 is provided with a first quantitative plate handle 52 below the end of the outside of the new material feed bin. A quantitative plate handle 52 is provided to move the first quantitative plate 5 for convenience.

The second quantitative plate 4 is provided with a second quantitative plate handle 42 below the end of the outside of the old material feed bin. The second quantitative plate handle 42 is provided to move the second quantitative plate 4 for convenience.

A material blocking handle 31 is arranged above the end of the first material blocking plate 3 located outside the new material feed bin. The first material retaining handle 31 is provided to facilitate the movement of the first material retaining plate 3 .

The second material blocking plate 2 is provided with a second material blocking handle 21 above the end of the outside of the old material feed bin. The second material retaining handle 21 is provided to facilitate the movement of the second material retaining plate 2 .

A stirring rod 11 is arranged to rotate in the mixing bin 1, a plurality of stirring blades 12 are arranged on the stirring rod 11, a mixing outlet 14 is arranged at the bottom of the mixing bin 1, and a mixing outlet 14 is rotated on the mixing outlet 14. A door panel 141 is provided, and two heating parts 13 are provided at the bottom of the mixing bin 1 on both sides of the mixing outlet 14 . With this setting, the new material and the old material can be fully mixed here, and the quality of the raw material can be improved, thus ensuring the quality of the product.

When the present invention starts to work, it is necessary to insert the first quantitative plate 5 and the second quantitative plate 4 into the new material feeding bin and the old material feeding bin respectively, so that the first quantitative hole 51 is aligned with the first through hole 151 and the second quantitative hole 41 pair quasi-B via hole 152 . Then pour a sufficient amount of new material that is in a molten state in the new material hopper 7, and pour a sufficient amount of old material that is in a molten state in the old material hopper 6. Now, pull out first material baffle plate 3 and second material baffle plate 2 simultaneously, so just opened new material hopper 7 and old material hopper 6 to mixing bin 1 passage. Set up like this, new material and old material just enter in the mixing bin 1 in a steady stream.

Because new material and old material begin to enter in the mixing bin 1 simultaneously, so the ratio of both flowing in the mixing bin 1 in the same period is exactly the ratio of the diameters of first quantitative hole 51 and second quantitative hole 41. Under the situation of not changing first quantitative plate 5 and second quantitative plate 4, this ratio is constant, so in mixing bin 1, the proportion of old material is constant. In this way, the use of old materials is maximized and resources are saved.

If the product changes, the proportional demand for old materials changes. At this time, the present invention needs to temporarily stop working, and after adjusting the ratio, start working again. The present invention shuts down, only needs to reinsert first material baffle plate 3 and second material baffle plate 2, block new material hopper 7 and old material hopper 6 to mixing bin 1 passage. Like this, just can not have raw material to enter again in the mixing bin 1. Now, need to change the second quantitative plate 4, select the second quantitative plate 4 that the required second quantitative hole 41 apertures are set, insert it in the old material feeding bin and get final product. Also can cooperate to change first quantitative plate 5, like this just can produce many kinds of changes, to meet the demand of actual production.

The ratio of the new material and the old material in the present invention can be adjusted, and the ratio of the old material in the raw material can be adjusted according to different raw materials and product requirements.

The invention has a simple structure and low manufacturing cost, can add a certain amount of recycled waste materials to the virgin materials, maximizes the resource utilization efficiency, and the ratio of the virgin materials to the waste materials can be adjusted.

Claims (6)

1. a kind of accurate mixing device of injection machine, including blending bunker (1), blending bunker (1) top is provided with feeding warehouse, and it is special Levy and be：The feeding warehouse includes virgin material feeding warehouse and old material feeding warehouse, and the feeding warehouse top is provided with virgin material charging aperture (71) and old material charging aperture (61), virgin material charging aperture (71) top is provided with virgin material hopper (7), the old material charging aperture (61) top is provided with old material hopper (6), and the blending bunker (1) is provided with a point storehouse plate (15), described point of storehouse and feeding warehouse between First through hole (151) and second through hole (152) are provided with plate (15), first striker plate (3) is movably set with the virgin material feeding warehouse With first quantifying board (5), first dosing hole (51) is provided with the first quantifying board (5), is movably set with the old material feeding warehouse Second striker plate (2) and second quantifying board (4), are provided with second dosing hole (41), the virgin material charging aperture on the second quantifying board (4) (71), with the blending bunker (1) be connected the virgin material hopper (7) with the first through hole (151) by the first dosing hole (51), The old material charging aperture (61), the second dosing hole (41) and the second through hole (152) are by the old material hopper (6) and described mixed Feed bin (1) is connected, the diameters of the first through hole (151), the virgin material charging aperture (71) and the first dosing hole (51) It is sequentially reduced, the diameters of the second through hole (152), the old material charging aperture (61) and the second dosing hole (41) subtract successively It is small.

2. the accurate mixing device of a kind of injection machine according to claim 1, it is characterised in that：First quantifying board (5) position End lower section outside the virgin material feeding warehouse is provided with first quantifying board handle (52).

3. the accurate mixing device of a kind of injection machine according to claim 2, it is characterised in that：Second quantifying board (4) position End lower section outside the old material feeding warehouse is provided with second quantifying board handle (42).

4. the accurate mixing device of a kind of injection machine according to claim 3, it is characterised in that：First striker plate (3) position End top outside the virgin material feeding warehouse is provided with first backgauge handle (31).

5. the accurate mixing device of a kind of injection machine according to claim 4, it is characterised in that：Second striker plate (2) position End top outside the old material feeding warehouse is provided with second backgauge handle (21).

6. the accurate mixing device of a kind of injection machine according to claim 5, it is characterised in that：Turn in the blending bunker (1) It is dynamic be provided with puddler (11), the puddler (11) if on be provided with dry plate paddle (12), blending bunker (1) bottom sets Batch mixing outlet (14) is equipped with, is rotated on batch mixing outlet (14) and is provided with door-plate (141), blending bunker (1) bottom is located at Described batch mixing outlet (14) both sides are provided with two heating parts (13).