Plastic tray injection molding device and injection molding method

Abstract

The invention discloses a plastic tray injection molding device and an injection molding method.The plastic tray injection molding device comprises a first mold and a second mold, a feeding through hole is formed in the bottom of the second mold, an injection molding head mechanism communicates with the feeding through hole, a feeding pipe sleeve is arranged in the feeding through hole, and an annular cavity is formed around the feeding through hole; a ring structure is arranged on the outer wall of the feeding pipe sleeve and located in the annular cavity, the ring structure divides the annular cavity into a first cavity and a second cavity, a first spring is arranged in the first cavity, the second cavity communicates with a first air inlet pipeline, and a mounting cavity communicating with the feeding through hole is formed in the position, close to the injection molding head mechanism, in the feeding through hole; a tool bit is arranged in the mounting cavity and connected with the inner wall of the mounting cavity through a second spring. The problem that according to injection molding equipment in the prior art, after injection molding, during discharging, a plastic connector in a channel for communicating an injection molding head with a mold is prone to breakage, and consequently follow-up injection molding is affected is solved.

Description

Technical Field

[0001] The invention relates to the field of plastic parts manufacturing, and in particular to a plastic pallet injection molding device and an injection molding method. Background Art

[0002] An injection molding machine is a device used in the production of plastic products. Its working principle is to use a plastic molding mold to make thermoplastic plastics or thermosetting plastics into plastic products of various shapes; specifically, the plasticized molten plastic is injected into a closed mold cavity through the thrust of a screw (or plunger), and the product is obtained after solidification and shaping. For example, a Chinese patent with patent number CN202222759114.7 provides an automatic injection molding mechanism of an injection molding machine, including a base, a first support block is fixedly installed at one end of the top surface of the base, a driving motor is arranged on the first support block, a second support block is fixedly installed on the top surface of the base, a support groove is opened on the top surface of the second support block, an injection molding tube is arranged in the support groove, an injection molding head is movably arranged at one end of the injection molding tube away from the first support block, a driving shaft of the driving motor extends to the inside of the injection molding tube and is coaxially connected to a rotating rod, and rotating blades are spirally arranged on the outer wall of the rotating rod. Through the mutual cooperation between the injection molding tube, the injection molding head, the second threaded rod and the clamping column, the second threaded rod is twisted to make the clamping column disengage from the clamping groove, and the injection molding head can be disassembled, so that the staff can dredge and clean the blocked injection molding head from the inside to avoid the injection molding efficiency being reduced due to the blockage of the injection head. For injection molding equipment such as the above-mentioned prior art, after injection molding, when unloading, the plastic joint in the channel connecting the injection head and the mold is easy to break, causing it to affect subsequent injection molding. At the same time, the molded plastic parts are easy to stick to the mold surface and are difficult to remove. Summary of the invention

[0003] The purpose of the present invention is to provide a plastic pallet injection molding device and injection molding method, which solves the problem that after injection molding, when unloading, the plastic joint in the channel connecting the injection head and the mold is easy to break, which affects the subsequent injection molding, and the molded plastic parts are easy to adhere to the mold surface and are difficult to remove.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a plastic pallet injection molding device, which includes a first mold and a second mold, a feed through hole is provided at the bottom of the second mold, an injection head mechanism is connected to the feed through hole, a feed pipe sleeve is provided in the feed through hole, an annular cavity is formed around the feed through hole, an outer wall of the feed pipe sleeve is provided with a ring structure, the ring structure is located in the annular cavity, the ring structure divides the annular cavity into a first cavity and a second cavity, a first spring is provided in the first cavity, the second cavity is connected to a first air intake pipe, a first control valve is provided on the first air intake pipe, an installation cavity connected to the feed through hole is provided near the injection head mechanism in the feed through hole, a cutter head is provided in the installation cavity, the cutter head is connected to the inner wall of the installation cavity through a second spring, a second air intake pipe is connected to the installation cavity, and a second control valve is provided on the second air intake pipe.

[0005] Preferably, the plastic pallet injection molding device comprises a base, a frame is arranged on the base, the second mold is fixed on the frame, and the first mold is movably arranged on the frame, so that the first mold can be close to or away from the second mold.

[0006] Preferably, an air pump is provided on the frame, the air pump is connected to a main pipeline, and the first air intake pipeline and the second air intake pipeline are respectively connected to the main pipeline.

[0007] Preferably, a mold frame is slidably disposed in the frame body, and the first mold is fixed at an end of the mold frame.

[0008] Preferably, a first cylinder is provided on the frame, and a piston rod of the first cylinder is connected to the mold frame.

[0009] Preferably, a discharge rack is fixed in the mold rack, a plurality of push rods are arranged in the discharge rack, a plurality of channels are arranged on the first mold, and the push rods are at least partially located in the channels.

[0010] Preferably, a second cylinder is provided on the unloading rack, and a piston rod of the second cylinder is connected to the push rod.

[0011] Preferably, a controller is disposed on the frame, and the controller is electrically connected to the first control valve and the second control valve respectively.

[0012] The present invention also provides an injection molding method, which is performed using the above-mentioned plastic pallet injection molding device, comprising:

[0013] 1) In the initial state, the first mold and the second mold are closed, and the injection material is injected through the injection head mechanism;

[0014] 2) After cooling, open the second control valve to push the cutter head to move so as to cut off the plastic body in the feed through hole;

[0015] 3) Opening the first control valve and the first cylinder at the same time, so that the first mold is opened, and using the displacement of the feed pipe sleeve to fit the injection molded part onto the surface of the first mold;

[0016] 4) Open the second cylinder and use the push rod to push down the injection molded part that is attached to the surface of the first mold.

[0017] Beneficial effect: The present invention provides a plastic pallet injection molding device, which includes a first mold and a second mold, a feed through hole is provided at the bottom of the second mold, an injection head mechanism is connected to the feed through hole, a feed pipe sleeve is provided in the feed through hole, an annular cavity is formed around the feed through hole, an outer wall of the feed pipe sleeve is provided with a ring structure, the ring structure is located in the annular cavity, the ring structure divides the annular cavity into a first cavity and a second cavity, a first spring is provided in the first cavity, the second cavity is connected to a first air intake pipe, a first control valve is provided on the first air intake pipe, an installation cavity connected to the feed through hole is provided near the injection head mechanism in the feed through hole, a cutter head is provided in the installation cavity, the cutter head is connected to the inner wall of the installation cavity through a second spring, the installation cavity is connected to a second air intake pipe, and a second control valve is provided on the second air intake pipe. During operation, in the initial state, the first mold and the second mold are closed, and the injection material is injected through the injection head mechanism; after cooling, the second control valve is opened to push the cutter head to move so as to cut off the plastic body in the feed through hole; the first control valve and the first cylinder are opened at the same time, so that the first mold is opened, and the injection molded part is attached to the surface of the first mold by using the feed pipe sleeve to move; the second cylinder is opened, and the injection molded part attached to the surface of the first mold is pushed down by the push rod. The plastic pallet injection molding device provided by the present invention can cut off the plastic head in the feed through hole in time to avoid the plastic head from breaking and remaining in the through hole during the unloading process, which affects the subsequent injection molding. At the same time, during the unloading process, the feed pipe sleeve can be used to attach the injection molded part to the surface of the first mold, which is convenient for the subsequent use of the push rod to push down the plastic part on the surface of the first mold, so as to facilitate unloading.

[0018] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1It is a structural diagram of the plastic pallet injection molding device provided by the present invention;

[0021] Figure 2 It is an enlarged view of the second mold in the plastic pallet injection molding device provided by the present invention.

[0022] Description of Reference Numerals

[0023] 1-base; 2-frame; 3-first cylinder; 4-mold frame; 5-first mold; 6-second cylinder; 7-push rod; 8-second mold; 9-unloading rack; 10-air pump; 11-injection head mechanism; 12-feeding pipe sleeve; 13-annular cavity; 14-ring structure; 15-first spring; 16-cutter head; 17-second spring; 18-second air intake pipe; 19-second control valve; 20-main pipe; 21-first control valve; 22-first air intake pipe. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0025] like Figure 1 and 2As shown: The present invention provides a plastic pallet injection molding device, the plastic pallet injection molding device comprises a first mold 5 and a second mold 8, the bottom of the second mold 8 is provided with a feed through hole, the injection head mechanism 11 is connected to the feed through hole, a feed pipe sleeve 12 is provided in the feed through hole, an annular cavity 13 is formed around the feed through hole, the outer wall of the feed pipe sleeve 12 is provided with a ring structure 14, the ring structure 14 is located in the annular cavity 13, and the ring structure 14 divides the annular cavity 13 into The first cavity and the second cavity, the first cavity is provided with a first spring 15, the second cavity is connected with a first air intake pipe 22, the first air intake pipe 22 is provided with a first control valve 21, the feed through hole is provided with a mounting cavity connected with the feed through hole near the injection head mechanism 11, the mounting cavity is provided with a cutter head 16, the cutter head 16 is connected with the inner wall of the mounting cavity through a second spring 17, the mounting cavity is connected with a second air intake pipe 18, the second air intake pipe 18 is provided with a second control valve 19. During operation, in the initial state, the first mold and the second mold are closed, and the injection material is injected through the injection head mechanism; after cooling, the second control valve is opened to push the cutter head to move to cut off the plastic body in the feed through hole; the first control valve and the first cylinder are opened at the same time, so that the first mold is opened, and the injection molded part is attached to the surface of the first mold by using the displacement of the feed pipe sleeve; the second cylinder is opened, and the injection molded part attached to the surface of the first mold is pushed down by the push rod. The plastic pallet injection molding device provided by the present invention can cut off the plastic head in the feed through hole in time to prevent the plastic head from breaking and remaining in the through hole during the unloading process, which affects the subsequent injection molding. At the same time, during the unloading process, the feed tube sleeve can be used to stick the injection-molded part to the surface of the first mold, which is convenient for the subsequent use of the push rod to push down the plastic part on the surface of the first mold to facilitate unloading.

[0026] In a preferred embodiment of the present invention, in order to facilitate limiting the displacement of the first mold, the plastic pallet injection molding device includes a base 1, a frame 2 is provided on the base 1, the second mold 8 is fixed on the frame 2, and the first mold 5 is movably provided on the frame 2, so that the first mold 5 can approach or move away from the second mold 8.

[0027] In a preferred embodiment of the present invention, in order to facilitate ventilation to control the displacement of the cutter head and the feed pipe sleeve, an air pump 10 is provided on the frame 2, and the air pump 10 is connected to a main pipeline 20, and the first air intake pipeline 22 and the second air intake pipeline 18 are respectively connected to the main pipeline 20.

[0028] In a preferred embodiment of the present invention, in order to facilitate the fixation of the first mold, a mold frame 4 is slidably provided in the frame body 2 , and the first mold 5 is fixed at an end of the mold frame 4 .

[0029] In a preferred embodiment of the present invention, in order to push the mold frame to move and thus complete the opening and closing of the first mold and the second mold, a first cylinder 3 is provided on the frame body 2, and a piston rod of the first cylinder 3 is connected to the mold frame 4.

[0030] In a preferred embodiment of the present invention, in order to facilitate pushing down the plastic parts attached to the surface of the first mold, a discharge rack 9 is fixed in the mold frame 4, and a plurality of push rods 7 are arranged in the discharge rack 9. A plurality of channels are arranged on the first mold 5, and the push rods 7 are at least partially located in the channels.

[0031] In a preferred embodiment of the present invention, in order to drive the push rod to move, a second cylinder 6 is provided on the unloading rack 9 , and a piston rod of the second cylinder 6 is connected to the push rod 7 .

[0032] In a preferred embodiment of the present invention, in order to centrally control the opening or closing of the first control valve and the second control valve, a controller is provided on the frame 2, and the controller is electrically connected to the first control valve 21 and the second control valve 19 respectively.

[0033] The present invention further provides an injection molding method, which is performed using the plastic pallet injection molding device according to claim 8, comprising:

[0034] 1. In the initial state, the first mold 5 and the second mold 8 are closed, and the injection material is injected through the injection head mechanism 11;

[0035] 2. After cooling, the second control valve 19 is opened to push the cutter head 16 to move so as to cut off the plastic body in the feed through hole;

[0036] 3. Open the first control valve 21 and the first cylinder 3 at the same time, so that the first mold 5 is opened, and the feed sleeve 12 is displaced to fit the injection molded part onto the surface of the first mold 5;

[0037] 4. Open the second air cylinder 6 and use the push rod 7 to push down the injection molded part attached to the surface of the first mold 5.

[0038] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0039] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0040] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A plastic pallet injection molding device, characterized in that: The plastic pallet injection molding device comprises a first mold (5) and a second mold (8), wherein a feed through hole is arranged at the bottom of the second mold (8), an injection head mechanism (11) is connected to the feed through hole, a feed sleeve (12) is arranged in the feed through hole, an annular cavity (13) is formed around the feed through hole, an outer wall of the feed sleeve (12) is provided with a ring structure (14), the ring structure (14) is located in the annular cavity (13), and the ring structure (14) divides the annular cavity (13) into a first cavity and a second cavity, A first spring (15) is arranged in the first cavity, the second cavity is connected to a first air intake pipe (22), a first control valve (21) is arranged on the first air intake pipe (22), a mounting cavity connected to the feed through hole is arranged in the feed through hole near the injection head mechanism (11), a cutter head (16) is arranged in the mounting cavity, the cutter head (16) is connected to the inner wall of the mounting cavity via a second spring (17), a second air intake pipe (18) is connected to the mounting cavity, and a second control valve (19) is arranged on the second air intake pipe (18).

2. The plastic pallet injection molding device according to claim 1, characterized in that: The plastic pallet injection molding device comprises a base (1), a frame (2) is arranged on the base (1), the second mold (8) is fixed on the frame (2), and the first mold (5) is movably arranged on the frame (2), so that the first mold (5) can approach or move away from the second mold (8).

3. The plastic pallet injection molding device according to claim 2, characterized in that: An air pump (10) is arranged on the frame (2), the air pump (10) is connected to a main pipeline (20), and the first air intake pipeline (22) and the second air intake pipeline (18) are respectively connected to the main pipeline (20).

4. The plastic pallet injection molding device according to claim 3, characterized in that: A mold frame (4) is slidably arranged inside the frame body (2), and the first mold (5) is fixed at the end of the mold frame (4).

5. The plastic pallet injection molding device according to claim 4, characterized in that: A first cylinder (3) is arranged on the frame body (2), and a piston rod of the first cylinder (3) is connected to the mold frame (4).

6. The plastic pallet injection molding device according to claim 5, characterized in that: A discharge rack (9) is fixed inside the mold rack (4), a plurality of push rods (7) are arranged inside the discharge rack (9), a plurality of channels are arranged on the first mold (5), and the push rods (7) are at least partially located inside the channels.

7. The plastic pallet injection molding device according to claim 6, characterized in that: The unloading rack (9) is provided with a second cylinder (6), and the piston rod of the second cylinder (6) is connected to the push rod (7).

8. The plastic pallet injection molding device according to claim 7, characterized in that: A controller is provided on the frame (2), and the controller is electrically connected to the first control valve (21) and the second control valve (19) respectively.

9. An injection molding method, characterized in that: The injection molding method is performed using the plastic pallet injection molding device according to claim 8, comprising: 1) In the initial state, the first mold (5) and the second mold (8) are closed, and the injection material is injected through the injection head mechanism (11); 2) After cooling, the second control valve (19) is opened to push the cutter head (16) to move so as to cut off the plastic body in the feed through hole; 3) Opening the first control valve (21) and the first cylinder (3) at the same time, so that the first mold (5) is opened, and the feed pipe sleeve (12) is displaced to fit the injection molded part onto the surface of the first mold (5); 4) Open the second air cylinder (6) and use the push rod (7) to push down the injection molded part attached to the surface of the first mold (5).

Images