Injection molding mechanism of injection molding machine

Abstract

The utility model discloses an injection molding mechanism of an injection molding machine. Comprising a base box body, and a material conveying and heating mechanism and an injection mechanism are arranged at one end of the upper portion of the base box body; the injection mechanism comprises a second servo electric cylinder, the second servo electric cylinder is connected with a push rod through an adapter, the injection mechanism comprises a quantitative pipe communicated with the first non-return assembly, and the other end of the quantitative pipe is provided with a second non-return assembly and an injection pipe; the first non-return assembly and the second non-return assembly are of the same structure and each comprise a valve body, a first baffle and a second baffle are arranged in each valve body, a non-return ball is arranged between each first baffle and the corresponding second baffle, a plurality of output holes are formed in each first baffle, and an input hole is formed in the middle of each second baffle. The utility model has the advantages that the plastic can be quantitatively conveyed into the mould at high pressure, and the backflow of the plastic can be prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molding machines, and in particular relates to an injection molding mechanism of an injection molding machine. Background Art

[0002] Injection molding machine is also called injection molding machine or injection machine. It is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. It is divided into vertical, horizontal and all-electric types. The injection molding machine can heat the plastic and apply high pressure to the molten plastic to make it ejected and fill the mold cavity.

[0003] In the production of plastic products, such as safety helmets, household plastic handles, toilet brush handles, livestock feeding hoppers, manure cleaning belts, etc., injection molding machines are needed for injection molding.

[0004] However, there are some problems with the prior art: when the existing injection molding machine is in use, the molten plastic is directly injected into the mold through the screw, but the conveying pressure of the screw is relatively small, which easily causes insufficient plastic content and cannot achieve quantitative determination. Therefore, we propose an injection molding mechanism for an injection molding machine. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide an injection molding mechanism of an injection molding machine, which can realize quantitative and high-pressure delivery of plastic into the mold and prevent the backflow of plastic by adding an injection mechanism and a non-return component.

[0006] The utility model is implemented as follows: an injection molding mechanism of an injection molding machine comprises a base box, one end of the upper part of the base box is provided with a feeding heating mechanism and an injection mechanism, and the other end of the base box is provided with a fixed mold, a first servo electric cylinder, a moving plate and a moving mold;

[0007] The feeding and heating mechanism includes a servo motor, a melting box and a conveying pipe, the output end of the servo motor is connected to a spiral blade shaft, the spiral blade shaft is movable in the melting box and the conveying pipe, and the end of the conveying pipe is connected to the injection mechanism through a connecting pipe and a first non-return assembly;

[0008] The injection mechanism includes a second servo electric cylinder, the second servo electric cylinder is connected to a push rod through an adapter, the injection mechanism includes a quantitative tube connected to the first non-return assembly, a push plate is provided inside the quantitative tube, one side of the push plate is fixedly connected to the push rod, the other end of the quantitative tube is provided with a second non-return assembly and an injection tube, and the injection tube is connected to the fixed mold;

[0009] The first non-return assembly and the second non-return assembly have the same structure and both include a valve body, a first baffle and a second baffle are provided inside the valve body, a non-return ball is provided between the first baffle and the second baffle, a plurality of output holes are provided on the first baffle, and an input hole is provided in the middle of the second baffle.

[0010] Specifically, a first mounting plate is fixedly mounted on one end of the base box, the injection mechanism is fixedly mounted on the first mounting plate, a second mounting plate is mounted on the first mounting plate and the base box via a support rod, and the feed heating mechanism is fixedly mounted on the second mounting plate.

[0011] Specifically, the upper part of the melting box is connected to a material storage funnel, and a plurality of heating rings are sleeved and installed on the conveying pipe.

[0012] Specifically, an active cavity is formed between the first baffle plate and the second baffle plate, and the check ball moves inside the active cavity.

[0013] Specifically, the fixed mold is fixedly arranged in the middle of the base box body, a guide pipe is fixedly arranged on one side of the fixed mold, and the injection tube is movably engaged in the interior of the guide pipe.

[0014] Specifically, a mounting frame is fixedly mounted on one end of the base box, the first servo electric cylinder is fixedly mounted on the upper portion of the mounting frame, and a first guide rail is fixedly mounted on the upper portion of one end of the base box.

[0015] Specifically, one side of the movable plate is fixedly connected to the output end of the first servo electric cylinder, the bottom of the movable plate is movably connected to the upper part of the first guide rail, and the other side of the movable plate is fixedly connected to the movable mold, and the movable mold is engaged with the fixed mold.

[0016] Specifically, the movable plate and the fixed mold are connected at four corners via guide rods, one end of the guide rod is fixedly connected to the fixed mold, and the movable plate is movably connected to the guide rod.

[0017] Specifically, a first fixed protective cover is fixedly installed on one end of the base box body, the material storage funnel is located on the outside of the first fixed protective cover, the material feeding heating mechanism and the injection mechanism are located inside the first fixed protective cover, and a second fixed protective cover is fixedly installed on the other end of the base box body, and the first servo electric cylinder, the movable plate and the movable mold are arranged inside the second fixed protective cover.

[0018] Specifically, a second guide rail is provided on the upper part of the base box on the outside of the second fixed protective cover, and a movable protective cover is movably installed on the second guide rail. The movable protective cover is located on the outside of the second fixed protective cover and is tightly connected to the first fixed protective cover, and a handle is fixedly installed on one side surface of the movable protective cover.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The utility model adds an injection mechanism between the feeding and heating mechanism and the fixed mold. The setting of the injection mechanism can realize quantitative and pressurized delivery of molten plastic to the interior of the fixed mold, which can reduce the stability of failure of injection molding or injection molding of defective products due to insufficient pressure or insufficient amount of molten plastic. The molten plastic is received by the quantitative tube, and then pushed to the interior of the fixed mold by the second servo electric cylinder.

[0021] In order to prevent the molten plastic from flowing back, a check assembly is added to the feeding heating mechanism and the injection mechanism. The check ball is restricted by the first baffle and the second baffle in the check assembly, so that the molten plastic can flow in through the input hole when it is input, and push the check ball open when it flows in, and then be discharged through the output hole. When the molten plastic flows back, it enters the active cavity through the output hole, and the molten plastic pushes the check ball, so that the check ball is engaged on the input hole, so that the molten plastic cannot flow back, thereby improving safety.

[0022] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram provided by the utility model;

[0024] Figure 2 It is a partial structural schematic diagram provided by the utility model;

[0025] Figure 3 It is a schematic diagram of the material feeding heating mechanism and the injection mechanism provided by the utility model;

[0026] Figure 4 It is a cross-sectional view of the material feeding and heating mechanism and the injection mechanism provided by the utility model;

[0027] Figure 5 It is a cross-sectional view of a first non-return assembly and a second non-return assembly provided by the utility model.

[0028] In the figure: 1, base box; 2, feeding heating mechanism; 201, servo motor; 202, melting box; 203, storage funnel; 204, conveying pipe; 205, heating ring; 206, spiral blade shaft; 207, first check assembly; 208, connecting pipe; 3, injection mechanism; 301, second servo electric cylinder; 302, adapter; 303, push rod; 304, quantitative tube; 305, push plate; 306, second check assembly; 307, injection tube; 3071, valve body; 3072, first gear Plate; 3073, second baffle; 3074, movable cavity; 3075, check ball; 3076, input hole; 3077, output hole; 4, fixed mold; 5, first servo electric cylinder; 6, movable plate; 7, movable mold; 8, guide rod; 9, guide pipe; 10, mounting frame; 11, first guide rail; 12, first mounting plate; 13, support rod; 14, second mounting plate; 15, first fixed protective cover; 16, second fixed protective cover; 17, second guide rail; 18, movable protective cover; 19, handle. DETAILED DESCRIPTION

[0029] In order to further understand the content, features and effects of the utility model, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0030] like Figures 1 to 5 As shown, an injection molding mechanism of an injection molding machine provided by an embodiment of the utility model comprises a base box body 1, a material feeding and heating mechanism 2 and an injection mechanism 3 are arranged at one end of the upper part of the base box body 1, and a fixed mold 4, a first servo electric cylinder 5, a movable plate 6 and a movable mold 7 are arranged at the other end of the base box body 1;

[0031] The feeding and heating mechanism 2 includes a servo motor 201, a melting box 202 and a conveying pipe 204. The output end of the servo motor 201 is connected to a spiral blade shaft 206. The spiral blade shaft 206 is movable in the melting box 202 and the conveying pipe 204. The end of the conveying pipe 204 is connected to the injection mechanism 3 through a connecting pipe 208 and a first non-return assembly 207.

[0032] The injection mechanism 3 includes a second servo electric cylinder 301, which is connected to a push rod 303 via an adapter 302. The injection mechanism 3 includes a metering tube 304 connected to the first non-return assembly 207. A push plate 305 is provided inside the metering tube 304. One side of the push plate 305 is fixedly connected to the push rod 303. The other end of the metering tube 304 is provided with a second non-return assembly 306 and an injection tube 307. The injection tube 307 is connected to the fixed mold 4.

[0033] The first check assembly 207 and the second check assembly 306 have the same structure and both include a valve body 3071. The interior of the valve body 3071 is provided with a first baffle 3072 and a second baffle 3073. A check ball 3075 is provided between the first baffle 3072 and the second baffle 3073. The first baffle 3072 is provided with a plurality of output holes 3077, and the middle of the second baffle 3073 is provided with an input hole 3076.

[0034] In this embodiment, preferably, a first mounting plate 12 is fixedly mounted on one end of the base housing 1, the injection mechanism 3 is fixedly mounted on the first mounting plate 12, the first mounting plate 12 and the base housing 1 are mounted with a second mounting plate 14 via a support rod 13, and the feeding heating mechanism 2 is fixedly mounted on the second mounting plate 14;

[0035] It should be noted that the first mounting plate 12 and the second mounting plate 14 are used to fix and support the injection mechanism 3 and the material feeding and heating mechanism 2 to maintain balance and stability during operation.

[0036] In this embodiment, preferably, the upper part of the melting box 202 is connected to a material storage funnel 203, and a plurality of heating rings 205 are sleeved and installed on the conveying pipe 204;

[0037] It should be noted that the setting of the storage funnel 203 is convenient for storing plastic particles and inputting them into the melting box 202 for heating into a molten state, and the setting of the heating ring 205 is convenient for heating the molten plastic during the transportation process to prevent the molten plastic from cooling down and causing cooling and solidification.

[0038] In this embodiment, preferably, a movable cavity 3074 is formed between the first baffle plate 3072 and the second baffle plate 3073, and the check ball 3075 is movable inside the movable cavity 3074;

[0039] It should be noted that the setting of the movable cavity 3074 facilitates the movable adjustment of the check ball 3075, which facilitates the flow of the molten plastic without causing blockage.

[0040] In this embodiment, preferably, the fixed mold 4 is fixedly arranged in the middle of the base box 1, a guide pipe 9 is fixedly arranged on one side of the fixed mold 4, and the injection tube 307 is movably engaged in the inside of the guide pipe 9;

[0041] It should be noted that the setting of the guide pipe 9 facilitates the connection of the injection tube 307 and can protect the injection tube 307 to prevent collision during mold closing, thereby preventing damage to the injection tube 307.

[0042] In this embodiment, preferably, a mounting frame 10 is fixedly mounted on one end of the base box 1, the first servo electric cylinder 5 is fixedly mounted on the upper part of the mounting frame 10, and a first guide rail 11 is fixedly mounted on the upper part of one end of the base box 1;

[0043] It should be noted that the setting of the mounting bracket 10 is convenient for fixing and mounting the first servo electric cylinder 5 , so as to maintain the stable operation of the first servo electric cylinder 5 .

[0044] In this embodiment, preferably, one side of the movable plate 6 is fixedly connected to the output end of the first servo electric cylinder 5, the bottom of the movable plate 6 is movably connected to the upper part of the first guide rail 11, and the other side of the movable plate 6 is fixedly connected to the movable mold 7, and the movable mold 7 is engaged with the fixed mold 4;

[0045] It should be noted that the first guide rail 11 is used to support the movement of the movable plate 6 and reduce friction, so that the first servo electric cylinder 5 can easily push the movable plate 6, and the movable mold 7 and the fixed mold 4 can be closed to form a cavity, so that the molten plastic can be injected into and cooled to form a product.

[0046] In this embodiment, preferably, the four corners of the movable plate 6 and the fixed mold 4 are connected by guide rods 8 respectively, one end of the guide rod 8 is fixedly connected to the fixed mold 4, and the movable plate 6 is movably connected to the guide rod 8;

[0047] It should be noted that, by setting the guide rod 8 , the movable plate 6 can be guided, so that when the movable plate 6 pushes the movable mold 7 , the movable mold 7 can be accurately engaged and connected with the fixed mold 4 .

[0048] In this embodiment, preferably, a first fixed protective cover 15 is fixedly installed at one end of the base housing 1, the storage funnel 203 is located outside the first fixed protective cover 15, the feeding heating mechanism 2 and the injection mechanism 3 are located inside the first fixed protective cover 15, and a second fixed protective cover 16 is fixedly installed at the other end of the base housing 1, and the first servo electric cylinder 5, the moving plate 6 and the moving mold 7 are arranged inside the second fixed protective cover 16;

[0049] It should be noted that the setting of the first fixed protective cover 15 and the second fixed protective cover 16 facilitates the safety protection of the equipment and can also achieve the safety protection of the operators.

[0050] In this embodiment, preferably, a second guide rail 17 is provided on the upper part of the base box 1 on the outer side of the second fixed protective cover 16, and a movable protective cover 18 is movably installed on the second guide rail 17. The movable protective cover 18 is located on the outer side of the second fixed protective cover 16 and is closely connected to the first fixed protective cover 15. A handle 19 is fixedly installed on one side surface of the movable protective cover 18;

[0051] It should be noted that the movable protective cover 18 can be closed during injection molding to provide safety protection for the operator. During cooling and molding, the movable protective cover 18 can be opened to facilitate the removal of the product from between the movable mold 7 and the fixed mold 4 during molding.

[0052] The specific operation process of this utility model:

[0053] When in use, the plastic particles are placed inside the storage hopper 203, and the plastic particles inside the storage hopper 203 enter the melting box 202 to be heated and melted to form a molten state, and then the spiral blade shaft 206 driven by the servo motor 201 is transported inside the melting box 202 and the conveying pipe 204, and a plurality of heating rings 205 are sleeved on the outer side of the conveying pipe 204 to heat the cooled and solidified plastic inside the conveying pipe 204 to prevent the plastic from condensing and forming and causing blockage. The molten plastic flows into the interior of the quantitative pipe 304 through the connecting pipe 208 and the first non-return assembly 207;

[0054] The quantitative tube 304 receives the quantitative amount of plastic required for product molding to achieve full utilization of resources. At this time, the first servo electric cylinder 5 pushes the movable plate 6 and the movable mold 7, so that the movable mold 7 and the fixed mold 4 can be in contact and connected by snapping to maintain sealing. Then, the second servo electric cylinder 301 and the push rod 303 push the push plate 305 inside the quantitative tube 304, so that the push plate 305 transports the melted plastic in the quantitative tube 304 to the movable mold 7 and the fixed mold 4 through the second check assembly 306 and the injection tube 307. The setting of the first check assembly 207 and the second check assembly 306 can effectively prevent the backflow of the molten plastic, and the second servo electric cylinder 301 can realize the rapid and high-pressure transportation of the molten plastic to the movable mold 7 and the fixed mold 4.

[0055] After the molten plastic inside the movable mold 7 and the fixed mold 4 is cooled and formed, the first servo electric cylinder 5 pulls the movable plate 6 and the movable mold 7 so that the products formed inside the movable mold 7 and the fixed mold 4 can be removed, which is convenient for injection molding of the next wheel.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection molding mechanism of an injection molding machine, comprising a base box (1), characterized in that: A material feeding and heating mechanism (2) and an injection mechanism (3) are provided at one end of the upper portion of the base housing (1), and a fixed mold (4), a first servo electric cylinder (5), a movable plate (6) and a movable mold (7) are provided at the other end of the base housing (1); The material feeding and heating mechanism (2) comprises a servo motor (201), a melting box (202) and a conveying pipe (204); the output end of the servo motor (201) is connected to a spiral blade shaft (206); the spiral blade shaft (206) is movable in the melting box (202) and the conveying pipe (204); the end of the conveying pipe (204) is connected to the injection mechanism (3) via a connecting pipe (208) and a first non-return assembly (207); The injection mechanism (3) includes a second servo electric cylinder (301), the second servo electric cylinder (301) is connected to a push rod (303) via an adapter (302), the injection mechanism (3) includes a metering tube (304) connected to the first non-return component (207), a push plate (305) is provided inside the metering tube (304), one side of the push plate (305) is fixedly connected to the push rod (303), the other end of the metering tube (304) is provided with a second non-return component (306) and an injection tube (307), and the injection tube (307) is connected to the fixed mold (4); The first non-return assembly (207) and the second non-return assembly (306) have the same structure and both include a valve body (3071). A first baffle (3072) and a second baffle (3073) are provided inside the valve body (3071). A non-return ball (3075) is provided between the first baffle (3072) and the second baffle (3073). A plurality of output holes (3077) are provided on the first baffle (3072), and an input hole (3076) is provided in the middle of the second baffle (3073).

2. The injection molding mechanism of an injection molding machine according to claim 1, characterized in that: A first mounting plate (12) is fixedly mounted on one end of the base housing (1), the injection mechanism (3) is fixedly mounted on the first mounting plate (12), a second mounting plate (14) is mounted on the first mounting plate (12) and the base housing (1) via a support rod (13), and the feed heating mechanism (2) is fixedly mounted on the second mounting plate (14).

3. The injection molding mechanism of an injection molding machine according to claim 1, characterized in that: The upper part of the melting box (202) is connected to a material storage funnel (203), and a plurality of heating rings (205) are sleeved and installed on the conveying pipe (204).

4. The injection molding mechanism of an injection molding machine according to claim 1, characterized in that: A movable cavity (3074) is formed between the first baffle plate (3072) and the second baffle plate (3073), and the check ball (3075) is movable inside the movable cavity (3074).

5. The injection molding mechanism of an injection molding machine according to claim 1, characterized in that: The fixed mold (4) is fixedly arranged in the middle of the base box (1), a guide pipe (9) is fixedly arranged on one side of the fixed mold (4), and the injection tube (307) is movably engaged inside the guide pipe (9).

6. The injection molding mechanism of an injection molding machine according to claim 1, characterized in that: A mounting frame (10) is fixedly mounted on one end of the base box (1), the first servo electric cylinder (5) is fixedly mounted on the upper portion of the mounting frame (10), and a first guide rail (11) is fixedly mounted on the upper portion of one end of the base box (1).

7. The injection molding mechanism of an injection molding machine according to claim 6, characterized in that: One side of the movable plate (6) is fixedly connected to the output end of the first servo electric cylinder (5), the bottom of the movable plate (6) is movably connected to the upper part of the first guide rail (11), and the other side of the movable plate (6) is fixedly connected to the movable mold (7), and the movable mold (7) is snap-fitted and connected to the fixed mold (4).

8. The injection molding mechanism of an injection molding machine according to claim 1, characterized in that: The four corners of the movable plate (6) and the fixed mold (4) are connected respectively via guide rods (8), one end of the guide rod (8) is fixedly connected to the fixed mold (4), and the movable plate (6) is movably connected to the guide rod (8).

9. The injection molding mechanism of an injection molding machine according to claim 3, characterized in that: A first fixed protective cover (15) is fixedly installed on one end of the base box body (1), the material storage funnel (203) is located on the outside of the first fixed protective cover (15), the material feeding heating mechanism (2) and the injection mechanism (3) are located inside the first fixed protective cover (15), and a second fixed protective cover (16) is fixedly installed on the other end of the base box body (1), and the first servo electric cylinder (5), the movable plate (6) and the movable mold (7) are arranged inside the second fixed protective cover (16).

10. The injection molding mechanism of an injection molding machine according to claim 9, characterized in that: A second guide rail (17) is provided on the upper part of the base housing (1) on the outer side of the second fixed protective cover (16); a movable protective cover (18) is movably mounted on the second guide rail (17); the movable protective cover (18) is located on the outer side of the second fixed protective cover (16) and is closely connected to the first fixed protective cover (15); a handle (19) is fixedly mounted on one side surface of the movable protective cover (18).

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