Injection molding device for plastic parts with built-in skeleton

Abstract

The utility model discloses a built -in framework plastic piece injection molding device belongs to plastic piece injection molding field, including installation box, be provided with one mobile block and no. 2 mobile block between installation box two side plates, one mobile block and no. 2 mobile block movement direction is opposite, one mobile block and no. 2 mobile block are provided with one lower cover and no. 2 lower cover respectively on, installation box inside is provided with vertical board, is provided with no. 2 sliding slot on vertical board, through the alternate motion structure of one lower cover and no. 2 lower cover, combine no. 2 sliding slot, make two lower covers can orderly alternate and move to the lower side of upper cover, when one of lower covers carries out plastic injection molding and cooling, operating personnel can complete unloading or new framework installation on another lower cover in standby work station synchronously, completely avoid injection molding cooling stage's equipment idling, greatly shorten single injection molding cycle, realize injection molding, seamless link of spare material continuous production, improve work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of plastic injection molding technology, specifically relating to an injection molding device for plastic parts with built-in skeleton. Background Technology

[0002] Built-in skeleton plastic parts are composite structural components that combine a rigid skeleton with plastic. Their core feature is the embedding of a pre-formed skeleton (such as a skeleton made of metal or glass fiber reinforced materials) inside the plastic matrix. Through injection molding, the molten plastic tightly wraps around the skeleton and cools to form the final product. This structure retains the advantages of plastic materials, such as corrosion resistance, ease of molding, and light weight, while also improving the overall strength, rigidity, and deformation resistance of the component with the help of the built-in skeleton. It can be widely used in fields that require certain structural stability and mechanical properties, such as electronic device housings, automotive parts, and mechanical connection components.

[0003] Existing injection molding equipment for plastic parts with built-in skeletons suffers from low operating efficiency in actual production. To complete one injection molding process, the equipment must go through the following steps in sequence: skeleton placement, plate assembly, plastic injection, cooling and solidification, and opening the contract and removing the part. Each step can only be started after the previous step is completed. Especially during the plastic cooling stage, the equipment is idle and cannot perform subsequent skeleton installation or unloading operations simultaneously, resulting in reduced work efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an injection molding device for plastic parts with a built-in skeleton, so as to solve the problem that each step has to wait for the previous step to finish before it can start, resulting in low work efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an injection molding device for plastic parts with built-in skeleton, including an installation box, wherein a first moving block and a second moving block are arranged between two side plates of the installation box, the first moving block and the second moving block move in opposite directions, and a first lower fitting plate and a second lower fitting plate are respectively arranged on the first moving block and the second moving block;

[0006] The installation box is equipped with a vertical plate, and a second sliding groove is provided on the vertical plate. The second sliding groove consists of two inclined grooves and a horizontal straight groove. The two inclined grooves are connected to the two sides of the straight groove, and the ends of the two inclined grooves that are far apart from each other are inclined upwards.

[0007] The first lower plate moves along a horizontal straight line, and the second lower plate moves along the trajectory of the second sliding groove;

[0008] An upper cladding plate is provided above the mounting box.

[0009] Furthermore, the first and second moving blocks are mounted on two threaded rods.

[0010] Furthermore, the two ends of the two threaded rods are rotatably mounted on the two side plates via bearings, and the two threaded rods are symmetrical about the vertical plate as an axis.

[0011] Furthermore, the two threaded rods are connected by a belt drive, and the threads on the two threaded rods are arranged in opposite directions, with one end of one of the threaded rods mounted on the motor output shaft.

[0012] Furthermore, a connecting plate is vertically connected to one side of the top of the first moving block, and the top of the connecting plate is connected to one side of the bottom of the first lower plate.

[0013] Furthermore, a support plate is connected to the bottom of the first lower plate on the side away from the connecting plate, and the support plate is slidably connected to the vertical plate through the first sliding groove.

[0014] Furthermore, a telescopic rod is connected to the top of the second moving block, the top end of the telescopic rod is connected to one side of the bottom of the second lower plate, a connecting rod is connected to the bottom of the second lower plate, the bottom end of the connecting rod is connected to a sliding rod, and the sliding rod is slidably disposed in the second sliding groove.

[0015] Furthermore, the distance between the connecting plate and the support plate is greater than the length of the second lower plate.

[0016] Furthermore, both the top of the second lower plate and the top of the first lower plate are provided with lower injection grooves, and the bottom of the upper plate is provided with an upper injection groove. The lower injection groove and the upper injection groove can form an injection chamber.

[0017] Furthermore, the upper plate is mounted on the push shaft of the electric push rod, and the upper plate is provided with a plastic input pipe that connects to the upper injection molding tank.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This built-in skeleton plastic injection molding device, through the alternating movement structure of the first and second lower plates, combined with the second slide, allows the two lower plates to move in an orderly and alternating manner to the injection station directly below the upper plate. While plastic injection and cooling are being performed on one of the lower plates, the operator can simultaneously complete unloading or installation of a new skeleton on the other lower plate which is in a waiting position. This completely avoids equipment idleness during the injection and cooling stages, significantly shortens the single injection cycle, realizes continuous production with seamless connection between injection and material preparation, and improves work efficiency. Attached Figure Description

[0020] Figure 1 A perspective view of an injection molding device for plastic parts with an internal skeleton.

[0021] Figure 2 for Figure 1The rear view after removing the upper panel;

[0022] Figure 3 for Figure 2 Schematic diagram after removing the connecting parts to the No. 2 lower panel;

[0023] Figure 4 for Figure 2 Another view after removing the connecting parts to the No. 1 lower panel;

[0024] Figure 5 for Figure 1 Diagram of the connection between the upper and middle panels.

[0025] In the diagram: 110, side plate; 120, front plate; 121, first slide groove; 130, vertical plate; 131, second slide groove; 132, inclined groove; 133, straight groove; 210, threaded rod; 220, first moving block; 221, connecting plate; 222, first lower closing plate; 223, support plate; 230, second moving block; 231, telescopic rod; 232, second lower closing plate; 233, connecting rod; 234, slide rod; 30, upper closing plate; 301, plastic input pipe; 310, electric push rod. Detailed Implementation

[0026] The present invention will be further described below with reference to the embodiments.

[0027] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0028] Please see Figure 1-5 This utility model provides an injection molding device for plastic parts with built-in skeleton, including a mounting box. A moving mechanism is provided between the left and right side plates 110 of the mounting box. A first sliding groove 121 is opened horizontally on the front plate 120 of the mounting box. A vertical plate 130 is connected to the inner cavity of the mounting box. A second sliding groove 131 is opened on the vertical plate 130. The second sliding groove 131 is composed of two inclined grooves 132 and a horizontal straight groove 133. The two inclined grooves 132 are connected to the two sides of the straight groove 133. The ends of the two inclined grooves 132 away from the straight groove 133 are set upwards away from each other.

[0029] The moving mechanism includes two threaded rods 210, a first moving block 220, and a second moving block 230. The two ends of the two threaded rods 210 are rotatably mounted on two side plates 110 via bearings. The two threaded rods 210 are symmetrical about the vertical plate 130. The first moving block 220 and the second moving block 230 are threadedly sleeved on the two threaded rods 210 respectively. One end of the two threaded rods 210 is connected to the transmission via two transmission wheels and a transmission belt. One end of one of the threaded rods 210 is mounted on the output shaft of the motor. The threads on the two threaded rods 210 are arranged in opposite directions. The two threaded rods 210 rotate in the same direction under the drive of the transmission belt and the transmission wheels. Since the threads on the two threaded rods 210 are in different directions, the first moving block 220 and the second moving block 230 move in opposite directions.

[0030] A connecting plate 221 is vertically connected to one side of the top of the first moving block 220. The top of the connecting plate 221 is connected to one side of the bottom of the first lower plate 222. An "L"-shaped support plate 223 is connected to the bottom of the first lower plate 222 away from the connecting plate 221. The support plate 223 is slidably connected to the vertical plate 130 through the first sliding groove 121. The first moving block 220 is rotated left and right by one of the threaded rods 210, so that the first lower plate 222 moves left and right with the first moving block 220.

[0031] The top of the second moving block 230 is connected to a telescopic rod 231. The top of the telescopic rod 231 is connected to one side of the bottom of the second lower plate 232. The bottom of the second lower plate 232 is connected to a connecting rod 233. The bottom end of the connecting rod 233 is connected to an "I"-shaped slide rod 234. The slide rod 234 is slidably disposed in the second slide groove 131.

[0032] The distance between the connecting plate 221 and the support plate 223 is greater than the length of the second lower plate 232. When the second lower plate 232 passes through the straight groove 133, the height of the second lower plate 232 is lower than that of the first lower plate 222, so that the second lower plate 232 moves from below the first lower plate 222 to the other side of the inclined groove 132.

[0033] When the second lower plate 232 is located at the end of the inclined groove 132 away from the straight groove 133, the second lower plate 232 is flush with the first lower plate 222, which facilitates the subsequent descent and injection molding of the upper plate 30.

[0034] The top of the second lower plate 232 and the top of the first lower plate 222 are both provided with a lower injection groove that is compatible with the upper plate 30, so that the second lower plate 232 and the first lower plate 222 can be used alternately.

[0035] The upper plate 30 is mounted on the push shaft of the electric push rod 310. The upper plate 30 is located above the top side of the mounting box. The upper plate 30 is provided with a plastic input pipe 301 that connects to the upper injection tank.

[0036] Working principle and usage process: The skeleton is manually placed into the lower injection groove at the top of the No. 1 lower composite plate 222.

[0037] When the motor is started, the motor output shaft drives one of the threaded rods 210 to rotate. Through the transmission wheel and transmission belt, the other threaded rod 210 rotates synchronously in the same direction. Since the two threaded rods 210 have different thread directions, the first moving block 220 moves along the threaded rod 210 towards the upper closing plate 30, while simultaneously driving the connecting plate 221 and the first lower closing plate 222 to move. The support plate 223 slides along the first sliding groove 121 of the front plate 120, ensuring that the first lower closing plate 222 moves smoothly to the injection molding station directly below the upper closing plate 30.

[0038] When the electric push rod 310 is activated, its pushing shaft extends downward, causing the upper plate 30 to descend vertically until the upper plate 30 and the first lower plate 222 are precisely joined together. The upper and lower injection tanks form a closed injection chamber, and the skeleton is completely inside the chamber. Molten plastic is injected into the injection chamber at a uniform speed through the plastic input pipe 301.

[0039] During the injection molding and cooling process of the first lower assembly plate 222, the operator places another set of skeletons to be injected into the lower injection tank of the second lower assembly plate 232 to complete the material preparation operation, thereby reusing time and improving work efficiency.

[0040] Once the plastic inside the lower molded plate 222 has completely cooled and solidified, the electric push rod 310 is activated to push the axial section upwards, causing the upper molded plate 30 to rise to its initial position. The motor is then restarted, and the rotation direction of the threaded rod 210 is adjusted. The first moving block 220 moves the lower molded plate 222 away from the upper molded plate 30, moving it from the injection molding station to the waiting work position.

[0041] As the first lower plate 222 moves out, the second moving block 230 moves along the threaded rod 210 toward the upper plate 30, causing the telescopic rod 231 and the second lower plate 232 to move. The slide rod 234 at the bottom of the connecting rod 233 slides along the trajectory of the second slide groove 131 of the vertical plate 130. When the slide rod 234 slides from the inclined groove 132 into the straight groove 133, the height of the second lower plate 232 decreases with the cooperation of the telescopic rod 231. At this time, the second lower plate 22 is lower than the first lower plate 222, and the second lower plate 22 passes smoothly under the first lower plate 222. Continuing to move, when the slide rod 234 slides from the straight groove 133 into the other side of the inclined groove 132, the height of the second lower plate 232 gradually increases. Finally, the slide rod 234 reaches the end of the inclined groove 132 away from the straight groove 133, and the second lower plate 232 is flush with the first lower plate 222 and precisely located at the injection molding station directly below the upper plate 30.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic injection molding device with an internal skeleton, comprising a mounting box, characterized in that: A first moving block (220) and a second moving block (230) are provided between the two side plates (110) of the mounting box. The first moving block (220) and the second moving block (230) move in opposite directions. A first lower fitting plate (222) and a second lower fitting plate (232) are respectively provided on the first moving block (220) and the second moving block (230). A vertical plate (130) is fixedly installed inside the mounting box. A second sliding groove (131) is provided on the vertical plate (130). The second sliding groove (131) is composed of two inclined grooves (132) and a horizontal straight groove (133). The two inclined grooves (132) are connected to the two sides of the straight groove (133), and the ends of the two inclined grooves (132) that are far apart from each other are inclined upwards. The first lower plate (222) moves along a horizontal straight line, and the second lower plate (232) moves along the trajectory of the second slide groove (131); An upper cladding plate (30) is provided above the mounting box.

2. The injection molding device for a plastic part with an internal skeleton according to claim 1, characterized in that: The first moving block (220) and the second moving block (230) are mounted on two threaded rods (210).

3. The injection molding device for a plastic part with an internal skeleton according to claim 2, characterized in that: The two ends of the two threaded rods (210) are rotatably mounted on the two side plates (110) via bearings, and the two threaded rods (210) are symmetrical about the vertical plate (130) as the axis.

4. The injection molding device for a plastic part with an internal skeleton according to claim 2 or 3, characterized in that: The two threaded rods (210) are connected by a belt drive, and the threads on the two threaded rods (210) are arranged in opposite directions. One end of one of the threaded rods (210) is mounted on the output shaft of the motor.

5. The injection molding device for a plastic part with an internal skeleton according to claim 1, characterized in that: A connecting plate (221) is vertically connected to one side of the top of the first moving block (220), and the top of the connecting plate (221) is connected to one side of the bottom of the first lower plate (222).

6. The injection molding device for a plastic part with an internal skeleton according to claim 5, characterized in that: The bottom of the first lower plate (222) is connected to a support plate (223) on the side away from the connecting plate (221). The support plate (223) is slidably connected to the vertical plate (130) through the first sliding groove (121).

7. The injection molding device for a plastic part with an internal skeleton according to claim 1, characterized in that: The top of the second moving block (230) is connected to a telescopic rod (231), the top of the telescopic rod (231) is connected to one side of the bottom of the second lower plate (232), the bottom of the second lower plate (232) is connected to a connecting rod (233), the bottom end of the connecting rod (233) is connected to a sliding rod (234), and the sliding rod (234) is slidably disposed in the second sliding groove (131).

8. The injection molding device for a plastic part with an internal skeleton according to claim 6, characterized in that: The distance between the connecting plate (221) and the support plate (223) is greater than the length of the second lower plate (232).

9. The injection molding device for a plastic part with an internal skeleton according to claim 1, characterized in that: The top of the second lower plate (232) and the top of the first lower plate (222) are both provided with lower injection grooves, and the bottom of the upper plate (30) is provided with an upper injection groove. The lower injection groove and the upper injection groove can form an injection cavity.

10. The injection molding device for a plastic part with an internal skeleton according to claim 9, characterized in that: The upper plate (30) is mounted on the push shaft of the electric push rod (310), and the upper plate (30) is provided with a plastic input pipe (301) that connects to the upper injection tank.

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