Low-pressure injection molding equipment for automotive upholstery

Abstract

The invention relates to the technical field of injection molding equipment, and discloses automobile interior trim part low-pressure injection molding equipment which comprises a machine shell, a movable mold mechanism and a fixed mold mechanism which are matched with each other to complete injection molding are arranged in the machine shell, and smoothing mechanisms are arranged in the machine shell and are arranged on the upper side and the lower side of the fixed mold mechanism; compared with the prior art, the mold has the beneficial effects that along with the reciprocating linear motion of the movable mold mechanism, the flattening mechanism flattens the covering layer, the situation that the covering layer is wrinkled in the injection molding process and consequently follow-up use is affected is avoided, the quality of injection molding finished products is improved, meanwhile, the product quality is improved, and meanwhile the product quality is improved. The movable mold mechanism can drive the fixed mold mechanism to fix the covering layer through adsorption, the covering layer is prevented from sliding in the injection molding process, and the quality of injection molding finished products is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding equipment, in particular to low-pressure injection molding equipment for automobile interior decoration parts. Background Art

[0002] Low-pressure injection molding of automotive interior parts is a process method that injects packaging materials into the mold at a very low injection pressure and quickly solidifies and forms them. It is between high-pressure injection molding and potting. It uses lower pressure to make the melt flow into the mold space to achieve the molding and manufacturing of automotive interior parts.

[0003] Existing low-pressure injection molding equipment for automotive interior parts usually includes a fixed mold and a movable mold driven by a hydraulic push rod and matched with the fixed mold. The mold closing, injection molding and mold opening and unloading operations are realized by the movement of the movable mold. For automotive interior parts, the existing low-pressure injection molding equipment can also place the covering layer on the fixed mold by a manipulator and set a compacting block to fix the covering layer. After that, the injection molding operation is realized by the movement of the movable mold. In this process, the flatness of the covering layer has an important influence on the quality of the injection molded product, and the manipulator of the existing injection molding equipment cannot smooth the covering layer. Once the covering layer has wrinkles during the transportation or shearing process and is not smoothed in time, after the injection molding is completed, it not only affects the visual experience, but also reduces the sense of value of the vehicle. In addition, since the covering layer is usually in an uneven stress state at the wrinkles, these parts are more susceptible to wear and tear during use, thereby shortening the service life of the automotive interior parts and easily affecting the assembly accuracy of the automotive interior parts. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a low-pressure injection molding device for automobile interior decoration parts.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: a low-pressure injection molding device for automotive interior parts, comprising a casing, wherein a movable mold mechanism and a fixed mold mechanism that cooperate with each other to complete the injection molding are arranged in the casing, a covering layer that penetrates the casing is arranged between the movable mold mechanism and the fixed mold mechanism, a smoothing mechanism is arranged in the casing, the smoothing mechanism is provided with two and respectively arranged on the upper and lower sides of the fixed mold mechanism, the smoothing mechanism comprises two smoothing brackets that are respectively located on the left and right sides of the covering layer, a smoothing plate is arranged between the two smoothing brackets to slide up and down, the covering layer penetrates the two groups of the smoothing plates, and a counter-covering plate is arranged on the smoothing plate for rotation The cover layer is clamped by a smoothing splint, and a smoothing spring providing a clamping force is provided between the smoothing splint and the smoothing plate. A connecting slider is provided on the smoothing plate on the lower side, and the connecting slider performs reciprocating linear motion in the up and down directions with the left and right movement of the movable mold mechanism. A steering groove wheel is rotatably provided on the smoothing bracket on the upper side, and a synchronous rope is provided on the connecting slider which is turned by the steering groove wheel and connected to the smoothing plate on the upper side. A synchronous spring is sleeved on the synchronous rope, and one end of the synchronous spring is connected to the smoothing bracket, and the other end is connected to the smoothing plate. A winding roller is rotatably provided on the outer side of the casing, which rotates unidirectionally with the movement of the movable mold mechanism and winds up the cover layer.

[0006] As an improvement, a linkage mechanism is provided on the outer side of the casing which moves with the movable mold mechanism and drives the connecting slider to perform reciprocating linear motion. The linkage mechanism includes a linkage slider slidably arranged on the casing, the linkage slider is connected to the movable mold mechanism, a linkage rack is provided on the outer side of the linkage slider, a linkage rotating column is rotatably provided on the casing, a linkage gear meshing with the linkage rack is provided on one side of the linkage rotating column, a linkage rotating arm is provided on the other side of the linkage rotating column, a linkage protrusion is provided at one end of the linkage rotating arm, a longitudinal slider connected to the connecting slider is slidably provided on the casing, a matching connecting rod is provided on the longitudinal slider, and a matching sliding groove that slidably cooperates with the linkage protrusion is provided on the matching connecting rod.

[0007] As an improvement, a one-way turntable is provided on one side of the winding roller, and a plurality of groups of one-way teeth are equidistantly provided on the inner side of the one-way turntable along the circumferential direction of the one-way turntable. A driving turntable is rotatably provided on the casing and rotates in a circle with the movement of the movable mold mechanism. A mounting groove is provided in the driving turntable, and a driving slider is slidably provided in the mounting groove and cooperates with the one-way teeth to drive the one-way turntable to rotate in one direction. A mounting spring connected to the driving slider is provided in the mounting groove.

[0008] As an improvement, the movable mold mechanism includes a movable mold mounting plate slidably arranged in the casing, a movable mold support plate is provided on the side of the movable mold mounting plate close to the fixed mold mechanism, an injection molding groove is provided on the movable mold support plate, and an injection molding tube is provided on the movable mold support plate. The fixed mold mechanism includes a fixed mold mounting plate arranged in the casing, a fixed mold mounting plate is provided on the side of the movable mold mechanism close to the fixed mold support plate, and an injection molding protrusion cooperating with the injection molding groove is provided on the fixed mold support plate. The injection molding protrusion is a hollow structure, and the injection molding protrusion reciprocates with the movable mold mounting plate to adsorb and release the covering layer.

[0009] As an improvement, a cutter bracket is slidably provided on the movable mold support plate, the cutter bracket is arranged around the injection groove, a cutter spring connected to the cutter bracket is provided on the movable mold support plate, and a cutter blade is provided on the cutter bracket.

[0010] As an improvement, a leveling bracket is symmetrically slidably provided on the movable mold support plate, a leveling pressure rod is provided on the leveling bracket to press the covering layer toward the fixed mold support plate, a pressing spring connected to the leveling bracket is provided on the movable mold support plate, a leveling rotating plate is rotatably provided on the leveling pressure rod, a leveling roller is rotatably provided on the leveling rotating plate, and a leveling spring connected to the leveling rotating plate is provided on the leveling bracket.

[0011] As an improvement, the injection molding protrusion is provided with an adsorption through hole, the fixed mold support plate is provided with an adsorption cavity connected with the adsorption through hole, a sealing piston is provided in the adsorption cavity for sealing and sliding, an adsorption block is provided at one end of the sealing piston extending out of the adsorption cavity, and a linkage support rod connected with the adsorption block is provided on the linkage slider.

[0012] As an improvement, a feed spring is provided in the casing, a feed plate is provided at the upper end of the feed spring, a vibration protrusion connected to the feed spring is provided at the lower end of the feed plate, and vibration support arms are provided on both sides of the movable mold mounting plate, and a vibration top block cooperating with the vibration protrusion is provided on the vibration support arm.

[0013] As an improvement, a longitudinal rack is provided on one side of the longitudinal slider, a longitudinal gear meshing with the longitudinal rack is rotatably provided on the casing, a longitudinal groove wheel is provided on the inner side of the longitudinal gear, a linkage groove wheel is rotatably provided on the casing, a longitudinal transmission belt is provided between the linkage groove wheel and the longitudinal groove wheel, a reversing groove wheel is provided on the outer side of the linkage groove wheel, a driving groove wheel is provided on the outer side of the driving turntable, and a linkage transmission belt is provided between the driving groove wheel and the reversing groove wheel.

[0014] Compared with the prior art, the present invention has the following beneficial effects: as the movable mold mechanism reciprocates in a straight line, the smoothing mechanism smoothes the covering layer, thereby preventing the covering layer from wrinkling during the injection molding process and affecting subsequent use, thereby improving the quality of the injection molded product; at the same time, the movable mold mechanism can drive the fixed mold mechanism to fix the covering layer by adsorption, thereby preventing the covering layer from slipping during the injection molding process, thereby improving the flatness of the automobile interior decoration parts, improving the sense of value of the vehicle, extending the service life of the automobile interior decoration parts, improving the assembly accuracy of the automobile interior decoration parts, and improving the quality of the injection molded product. Specifically: 1. The linkage mechanism converts the power of the moving mold mechanism into the power of the smoothing mechanism to smooth the covering layer and the power of the fixed mold mechanism to adsorb the covering layer, thereby reducing the setting of power components, reducing the repair and maintenance costs, and improving the integrity of the device of the present invention; 2. The linkage slider drives the adsorption block and the sealing piston to move synchronously through the linkage support rod, so that a negative pressure environment is formed in the adsorption chamber, so that the covering layer and the injection molding convex block are in close contact, and the adsorption through holes evenly distributed around the injection molding convex block keep the covering layer in close contact with the injection molding convex block, avoiding displacement of the covering layer during the injection molding process, and further improving the quality of the injection molded product; 3. The movable mold mechanism drives the blanking plate to vibrate during the reciprocating linear motion, so that the finished injection molded product moves out of the casing through the blanking plate, avoiding the accumulation of the finished injection molded product, preventing damage to the appearance of the finished injection molded product, and improving the efficiency of blanking. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a structural schematic diagram of a low-pressure injection molding device for automobile interior decoration parts.

[0016] Figure 2 The present invention is a cross-sectional view of a low-pressure injection molding device for automobile interior decoration parts.

[0017] Figure 3 The present invention is a structural schematic diagram of a low-pressure injection molding device for automobile interior decoration parts without a casing part.

[0018] Figure 4 It is an exploded view of a low-pressure injection molding device for automobile interior decoration parts of the present invention with the casing part removed.

[0019] Figure 5 It is an exploded view of a smoothing mechanism of a low-pressure injection molding device for automobile interior decoration parts of the present invention.

[0020] Figure 6 The invention is a low-pressure injection molding equipment for automobile interior decoration Figure 5 Enlarged view of part A.

[0021] Figure 7 The invention discloses an exploded diagram of a linkage mechanism of a low-pressure injection molding device for automobile interior decoration parts.

[0022] Figure 8 The invention discloses an exploded view of a movable mold mechanism of a low-pressure injection molding device for automobile interior decoration parts.

[0023] Fig. 9 The present invention is a cross-sectional view of a movable mold mechanism of a low-pressure injection molding device for automobile interior decoration parts.

[0024] Fig.10 The invention is a low-pressure injection molding equipment for automobile interior decoration Fig. 9 Enlarged view of part B.

[0025] Fig.11 The invention discloses an exploded view of a fixed mold mechanism of a low-pressure injection molding device for automobile interior decoration parts.

[0026] Fig.12The present invention is a cross-sectional view of a fixed mold mechanism of a low-pressure injection molding device for automobile interior decoration parts.

[0027] Fig.13 The present invention is a cross-sectional view of a casing portion of a low-pressure injection molding device for automobile interior decoration parts.

[0028] As shown in the figure: 1. Housing; 11. Feeding plate; 111. Vibrating convex block; 112. Feeding spring; 113. Feeding ejector; 2. Moving mold mechanism; 21. Moving mold mounting plate; 211. Vibrating support arm; 212. Vibrating ejector block; 22. Moving mold support plate; 221. Injection groove; 222. Injection tube; 223. Feeding tube; 224. Ejecting plate; 225. Ejecting spring; 226. Ejecting striker; 23. Cutter bracket; 231. Cutter spring; 232, Cutter blade; 24, Leveling bracket; 241, Pressing spring; 242, Leveling pressure rod; 243, Leveling rotating plate; 244, Leveling roller; 245, Leveling spring; 3, Fixed mold mechanism; 31, Fixed mold mounting plate; 32, Fixed mold support plate; 33, Injection molding convex block; 331, Adsorption through hole; 332, Adsorption cavity; 333, Sealing piston; 334, Adsorption block; 4, Smoothing mechanism; 41, Smoothing bracket; 41 1. Smoothing plate; 412. Connecting slider; 413. Smoothing splint; 414. Smoothing spring; 42. Synchronous rope; 421. Steering groove wheel; 422. Synchronous spring; 43. Connecting roller; 44. Winding roller; 441. One-way turntable; 5. Covering layer; 6. Linkage mechanism; 61. Linkage slider; 611. Linkage rack; 612. Linkage support rod; 613. Linkage rotating column; 614. Linkage gear; 615. Linkage rotating arm; 6 16. linkage protrusion; 62. longitudinal slider; 621. longitudinal rack; 622. matching connecting rod; 623. matching slide groove; 624. positioning rod; 63. longitudinal gear; 631. longitudinal groove wheel; 632. longitudinal transmission belt; 64. driving turntable; 641. mounting slide groove; 642. mounting spring; 643. driving slider; 644. driving groove wheel; 65. linkage groove wheel; 651. reversing groove wheel; 652. linkage transmission belt. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0030] Combined with Figure 1 , Attachment Figure 2 , Attachment Figure 3 With attached Figure 4As shown, a low-pressure injection molding equipment for automobile interior decoration parts includes a casing 1, and the casing 1 is provided with openings at the upper end and both sides. A movable mold mechanism 2 and a fixed mold mechanism 3 that cooperate with each other to complete injection molding are provided in the casing 1, and a covering layer 5 that penetrates the casing 1 is provided between the movable mold mechanism 2 and the fixed mold mechanism 3. The fixed mold mechanism 3 is fixedly arranged in the casing 1, and the movable mold mechanism 2 is slidably arranged in the casing 1. A hydraulic push rod that drives the movable mold mechanism 2 to reciprocate linearly is provided in the casing 1. A smoothing mechanism 4 is provided in the casing 1, and the smoothing mechanism 4 has two and is respectively arranged on the upper and lower sides of the fixed mold mechanism 3. The smoothing mechanism 4 is clamped on the covering layer 5 and moves up and down to level the covering layer 5. A winding roller 44 that rotates unidirectionally with the movement of the movable mold mechanism 2 and winds up the covering layer 5 is provided on the outer side of the casing 1. The covering layer 5 is transported by a raw material providing mechanism, and the raw material providing mechanism can be composed of a reel or other components wrapped with the covering layer 5.

[0031] The working principle of the present invention is as follows: when the hydraulic push rod is extended, the movable mold mechanism 2 approaches the fixed mold mechanism 3, at which time the winding roller 44 rotates to wind up the covering layer 5, and when the covering layer 5 passes through the smoothing mechanism 4, the smoothing mechanism 4 smoothes the covering layer 5, thereby preventing the covering layer 5 from wrinkling during the injection molding process and affecting subsequent use, thereby improving the quality of the injection molded product; Afterwards, the movable mold mechanism 2 contacts the covering layer 5 and performs a point-break cutting operation on the covering layer 5. At this time, the covering layer 5 of the part to be injected has less adhesion with the main part of the covering layer 5, which is convenient for subsequent disconnection from the main part of the covering layer 5 and accurate positioning of the covering layer 5 of the part to be injected. Then, the movable mold mechanism 2 continues to approach the fixed mold mechanism 3 until the mold is closed. Since the movable mold mechanism 2 and the fixed mold mechanism 3 are closely matched, the covering layer 5 of the part to be injected can be disconnected from the main part of the covering layer 5. The fixed mold mechanism 3 fixes the covering layer 5 by adsorption. At this time, the injection molding operation can be started; After the injection molding is completed and cooling is achieved, the movable mold mechanism 2 moves away from the fixed mold mechanism 3. During this process, the frame waste of the covering layer 5 cut by the movable mold mechanism 2 moves downward, and the smoothing mechanism 4 smoothes the new covering layer 5 during this process. The finished injection molding product falls off from the movable mold mechanism 2 and moves out of the casing 1.

[0032] Combined with Figure 3 , Attachment Figure 4 , Attachment Figure 5 With attached Figure 6As shown, the smoothing mechanism 4 includes two smoothing brackets 41 respectively located on the left and right sides of the covering layer 5, a smoothing plate 411 is provided between the two smoothing brackets 41 for sliding up and down, the covering layer 5 passes through the two groups of the smoothing plates 411, a smoothing splint 413 for clamping the covering layer 5 is rotatably provided on the smoothing plates 411, a smoothing spring 414 for providing clamping force is provided between the smoothing plates 411 and the smoothing splint 413, a connecting slider 412 is provided on the lower side of the smoothing plate 411, and the connecting slider 41 2 performs reciprocating linear motion in the up-down direction with the left-right movement of the movable mold mechanism 2, a steering groove wheel 421 is rotatably provided on the upper smoothing bracket 41, a synchronous rope 42 is provided on the connecting slider 412, which is steered by the steering groove wheel 421 and connected to the upper smoothing plate 411, a synchronous spring 422 is sleeved on the synchronous rope 42, one end of the synchronous spring 422 is connected to the smoothing bracket 41, and the other end is connected to the smoothing plate 411, and a connecting roller 43 cooperating with the winding roller 44 is rotatably provided in the housing 1.

[0033] Working principle of the smoothing mechanism 4: When the connecting slider 412 moves linearly upward with the movable mold mechanism 2, the connecting slider 412 drives the connected smoothing plate 411 to move upward. At this time, the synchronous spring 422 is reset and drives the upper smoothing plate 411 to move downward. During this process, the winding roller 44 rotates to wind up the covering layer 5. With the cooperation of the smoothing spring 414, the smoothing clamping plate 413 slides relative to the covering layer 5 and smoothes the covering layer 5. On the contrary, when the connecting slider 412 moves linearly downward with the movable mold mechanism 2, the connecting slider 412 drives the smoothing plate 411 connected thereto to move downward. During this process, the connecting slider 412 drives the upper smoothing plate 411 to move upward through the synchronization rope 42 to reset. The upper smoothing plate 411 squeezes the synchronization spring 422, the synchronization spring 422 contracts, and the upper smoothing splint 413 slides relative to the covering layer 5 to achieve the leveling operation of the covering layer 5.

[0034] Combined with Figure 3 , Attachment Figure 4 , Attachment Figure 5 With attached Figure 7As shown, the outer side of the housing 1 is provided with a linkage mechanism 6 which moves with the movable mold mechanism 2 and drives the connecting slider 412 to perform reciprocating linear motion. The linkage mechanism 6 includes a linkage slider 61 slidably arranged on the housing 1, the linkage slider 61 is connected to the movable mold mechanism 2, a linkage rack 611 is arranged on the outer side of the linkage slider 61, a linkage rotating column 613 is rotatably arranged on the housing 1, a linkage gear 614 meshing with the linkage rack 611 is arranged on one side of the linkage rotating column 613, the linkage rack 611 is provided with a transition sliding layer on both sides of the teeth, and the linkage gear 614 does not rotate when passing through the transition sliding layer, a linkage rotating arm 615 is arranged on the other side of the linkage rotating column 613, and a linkage protrusion 616 is arranged at one end of the linkage rotating arm 615, a longitudinal slider 62 is slidably arranged on the housing 1, a positioning rod 624 connected to the connecting slider 412 is arranged at the lower end of the longitudinal slider 62, a matching connecting rod 622 is arranged on the longitudinal slider 62, and a matching sliding groove 623 slidably matched with the linkage protrusion 616 is arranged on the matching connecting rod 622; A one-way turntable 441 is provided on one side of the winding roller 44, and a plurality of one-way teeth are provided on the inner side of the one-way turntable 441 at equal intervals along the circumferential direction of the one-way turntable 441. A driving turntable 64 that rotates in a circle following the movement of the movable mold mechanism 2 is rotatably provided on the housing 1, and a mounting slide 641 is provided in the driving turntable 64. A driving slider 643 that cooperates with the one-way teeth to drive the one-way turntable 441 to rotate in one direction is slidably provided in the mounting slide 641, and a mounting spring 642 connected to the driving slider 643 is provided in the mounting slide 641; A longitudinal rack 621 is provided on one side of the longitudinal slider 62, a longitudinal gear 63 meshing with the longitudinal rack 621 is rotatably provided on the casing 1, a longitudinal groove wheel 631 is provided on the inner side of the longitudinal gear 63, a linkage groove wheel 65 is rotatably provided on the casing 1, a longitudinal transmission belt 632 is provided between the linkage groove wheel 65 and the longitudinal groove wheel 631, a reversing groove wheel 651 is provided on the outer side of the linkage groove wheel 65, a driving groove wheel 644 is provided on the outer side of the driving turntable 64, and a linkage transmission belt 652 is provided between the driving groove wheel 644 and the reversing groove wheel 651.

[0035] Working principle of linkage mechanism 6: when movable mold mechanism 2 moves toward fixed mold mechanism 3, movable mold mechanism 2 drives linkage slider 61 to slide in the same direction, linkage rack 611 slides synchronously, during which linkage gear 614 first slides relative to linkage rack 611, then rotates and slides relative to linkage rack 611, when linkage gear 614 slides relative to linkage rack 611, the covering layer 5 remains stationary to facilitate injection molding operation; During the relative rotation between the linkage gear 614 and the linkage rack 611, the linkage gear 614 drives the linkage arm 615 and the linkage protrusion 616 to rotate counterclockwise synchronously, the linkage protrusion 616 slides relatively with the matching slide groove 623 and drives the matching connecting rod 622 and the longitudinal slider 62 to slide upward synchronously through the matching slide groove 623, the positioning rod 624 drives the connecting slider 412 to slide upward synchronously, at the same time, the longitudinal rack 621 moves upward and drives the longitudinal gear 63 meshing therewith to rotate clockwise, the longitudinal groove wheel 631 drives the driving groove wheel 644 to rotate clockwise synchronously through the longitudinal transmission belt 632, the linkage groove wheel 65, the reversing groove wheel 651 and the linkage transmission belt 652, the driving slider 643 drives the one-way turntable 441 to rotate clockwise through the one-way teeth, thereby driving the winding roller 44 to rotate and winding the covering layer 5; When the movable mold mechanism 2 moves away from the fixed mold mechanism 3, the movable mold mechanism 2 drives the linkage slider 61 to slide in the same direction, and the linkage rack 611 slides synchronously. In this process, the linkage gear 614 first slides relative to the linkage rack 611, then rotates and slides relatively. The linkage gear 614 drives the linkage rotating arm 615 and the linkage protrusion 616 to rotate clockwise synchronously. The linkage protrusion 616 slides relative to the matching slide groove 623 and drives the matching connecting rod 622 and the longitudinal slider 62 to slide downward synchronously through the matching slide groove 623. The positioning rod 624 drives the connecting slider 412 to slide downward synchronously. At the same time, the longitudinal rack 621 moves downward and drives the longitudinal gear 63 meshing therewith to rotate counterclockwise. The longitudinal groove wheel 631 drives the driving groove wheel 644 to rotate counterclockwise synchronously through the longitudinal transmission belt 632, the linkage groove wheel 65, the reversing groove wheel 651 and the linkage transmission belt 652. The one-way turntable 441 remains stationary under the action of friction.

[0036] Combined with Figure 3 , Attachment Figure 4 , Attachment Figure 8 , Attachment Fig. 9 , Attachment Fig.11 With attached Fig.13As shown, the movable mold mechanism 2 includes a movable mold mounting plate 21 slidably arranged in the casing 1, a movable mold support plate 22 is provided on the side of the movable mold mounting plate 21 close to the fixed mold mechanism 3, the movable mold mounting plate 21 is connected to the movable mold support plate 22 by bolts, an injection groove 221 is provided on the movable mold support plate 22, a ejection pin 226 arranged on the inner side of the injection groove 221 is slidably arranged on the movable mold support plate 22, the ejection pin 226 extends into the inner side of the movable mold support plate 22 and is provided with an ejection plate 224, an ejection spring 225 connected to the movable mold support plate 22 is provided on the ejection plate 224, a material discharge ejector rod 113 cooperating with the ejection plate 224 is provided in the casing 1, and the movable mold support plate An injection molding tube 222 is provided on 22, and a feed pipe 223 connected to the injection molding tube 222 is provided on the casing 1. The feed pipe 223 can be freely retracted, and one end of the feed pipe 223 is connected to an external injection molding raw material providing mechanism. This is the current prior art and will not be repeated here. The fixed mold mechanism 3 includes a fixed mold mounting plate 31 arranged in the casing 1, and a fixed mold support plate 32 is provided on the side of the fixed mold mounting plate 31 close to the movable mold mechanism 2. An injection molding protrusion 33 cooperating with the injection molding groove 221 is provided on the fixed mold support plate 32. The injection molding protrusion 33 is a hollow structure. The injection molding protrusion 33 moves back and forth with the movable mold mounting plate 21 to adsorb and relax the covering layer 5.

[0037] The working principle of the movable mold mechanism 2 and the fixed mold mechanism 3 for injection molding is as follows: the movable mold mounting plate 21 drives the movable mold support plate 22 and the injection molding groove 221 to approach the fixed mold mounting plate 31 until the injection molding groove 221 cooperates with the injection molding protrusion 33. During this process, the injection molding protrusion 33 realizes the adsorption and fixation of the covering layer 5. When the injection molding groove 221 cooperates with the injection molding protrusion 33, the covering layer 5 and the injection molding protrusion 33 are tightly fitted. The injection molding raw material is injected into the injection molding groove 221 through the cooperation of the feed pipe 223 and the injection molding pipe 222. After the plastic raw material is cooled, the injection raw material is fixedly connected with the covering layer 5. Then, the movable mold mounting plate 21 drives the movable mold support plate 22 and the injection molding groove 221 to move away from the fixed mold mounting plate 31. When the ejector plate 224 contacts the ejector rod 113, as the movable mold mounting plate 21 continues to move, the ejector rod 113 acts on the ejector plate 224. The ejector plate 224 moves and squeezes the ejector spring 225. The ejector spring 225 contracts under the force, and the ejector striker 226 moves to eject the finished injection molded product, completing the injection molding operation.

[0038] Combined with Figure 8 , Attachment Fig. 9 , Attachment Fig.10 With attached Fig.11As shown, a cutter bracket 23 is slidably provided on the movable mold support plate 22, and the cutter bracket 23 is arranged around the injection groove 221. A cutter spring 231 connected to the cutter bracket 23 is provided on the movable mold support plate 22, and a cutter blade 232 is provided on the cutter bracket 23. A leveling bracket 24 is symmetrically slidably provided on the movable mold support plate 22, and a leveling pressure rod 242 for pressing the covering layer 5 toward the fixed mold support plate 32 is provided on the leveling bracket 24. A pressing spring 241 connected to the leveling bracket 24 is provided on the movable mold support plate 22, a leveling rotating plate 243 is rotatably provided on the leveling pressure rod 242, a leveling roller 244 is rotatably provided on the leveling rotating plate 243, and a leveling spring 245 connected to the leveling rotating plate 243 is provided on the leveling bracket 24.

[0039] The working principle of the cutter blade 232 for performing point-break cutting on the covering layer 5 is as follows: during the movement of the movable mold support plate 22 toward the fixed mold support plate 32, the leveling roller 244 contacts the covering layer 5 and pushes the covering layer 5 to be close to the fixed mold support plate 32, and the leveling pressure rod 242 presses the covering layer 5 to prevent the covering layer 5 from being displaced. As the movable mold support plate 22 continues to move, the cutter blade 232 contacts the covering layer 5 to perform point-break cutting on the covering layer 5. Afterwards, the injection groove 221 presses the covering layer 5 toward the injection protrusion 33 and cuts off the covering layer 5, which is convenient for subsequent injection molding operations.

[0040] Combined with Figure 7 , Attachment Figure 8 , Attachment Fig.11 With attached Fig.12 As shown, the injection molding protrusion 33 is provided with an adsorption through hole 331, and a plurality of groups of adsorption through holes 331 are arranged, and the plurality of groups of adsorption through holes 331 are evenly distributed around the injection molding protrusion 33, and an adsorption cavity 332 connected with the adsorption through hole 331 is provided on the fixed mold support plate 32, and a sealing piston 333 is provided in the adsorption cavity 332 for sealing and sliding, and an adsorption block 334 is provided at one end of the sealing piston 333 extending out of the adsorption cavity 332, and a linkage support rod 612 connected with the adsorption block 334 is provided on the linkage slider 61.

[0041] The working principle of the injection molding protrusion 33 to achieve adsorption and fixation of the covering layer 5: when the linkage slider 61 moves toward the fixed mold support plate 32, the linkage slider 61 drives the adsorption block 334 to move synchronously through the linkage support rod 612, and the adsorption block 334 drives the sealing piston 333 to move, and a negative pressure environment is formed in the adsorption chamber 332. The adsorption through holes 331 evenly distributed around the injection molding protrusion 33 keep the covering layer 5 in close contact with the injection molding protrusion 33, thereby improving the quality of the injection molded product.

[0042] Combined with Figure 2 , Attachment Figure 8 With attached Fig.13As shown, a blanking spring 112 is provided in the casing 1, a blanking plate 11 is provided at the upper end of the blanking spring 112, the blanking plate 11 is an L-shaped structure, a vibration protrusion 111 connected to the blanking spring 112 is provided at the lower end of the blanking plate 11, vibration arms 211 are provided on both sides of the movable mold mounting plate 21, and a vibration top block 212 cooperating with the vibration protrusion 111 is provided on the vibration arm 211.

[0043] Working principle of the blanking plate 11: the movable mold mounting plate 21 drives the vibration support arm 211 and the vibration top block 212 to synchronously perform reciprocating linear motion during the reciprocating linear motion. During this process, the vibration top block 212 contacts the vibration protrusion 111. With the cooperation of the blanking spring 112, the vibration protrusion 111 drives the blanking plate 11 to vibrate, so that the injection molded product moves out of the casing 1 through the blanking plate 11 to realize the blanking operation.

[0044] In the specific implementation of the present invention, first, the feed pipe 223 is connected to the external injection molding raw material supply mechanism, and the covering layer 5 passes through the two groups of smoothing plates 411 in sequence, passes through the connecting roller 43, and is wound onto the winding roller 44 and fixed; Afterwards, the hydraulic push rod is extended, the movable mold mounting plate 21 drives the movable mold support plate 22 and the injection molding groove 221 to move toward the injection molding protrusion 33, the winding roller 44 rotates to wind up the covering layer 5, and the covering layer 5 moves through the upper side smoothing clamping plate 413 to perform a smoothing operation. Afterwards, the covering layer 5 remains stationary, the leveling roller 244 contacts the covering layer 5 and pushes the covering layer 5 to be close to the fixed mold support plate 32, the leveling pressure rod 242 realizes pressing on the covering layer 5, and the cutting blade 232 contacts the covering layer 5 to realize point-break cutting of the covering layer 5. At the same time, the sealing piston 333 moves, and a negative pressure environment is formed in the adsorption chamber 332. The covering layer 5 is in close contact with the injection molding protrusion 33, and the injection molding groove 221 presses the covering layer 5 toward the injection molding protrusion 33 and realizes cutting of the covering layer 5. Next, the injection molding material is injected into the injection molding groove 221 through the cooperation of the feed pipe 223 and the injection molding tube 222. After cooling, the injection molding material is fixedly connected to the covering layer 5. After that, the movable mold mounting plate 21 drives the movable mold support plate 22 and the injection molding groove 221 to move away from the fixed mold mounting plate 31, and the ejector pin 226 moves to eject the finished injection molding product, completing the injection molding operation.

[0045] The present invention and its embodiments are described above, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and do not deviate from the purpose of the invention, they can creatively design a structure and embodiment similar to the technical solution, which should fall within the protection scope of the present invention.

Claims

1. A low-pressure injection molding device for automotive interior parts, comprising a housing (1), wherein a movable mold mechanism (2) and a fixed mold mechanism (3) are provided in the housing (1) for cooperating with each other to complete the injection molding, and a covering layer (5) is provided between the movable mold mechanism (2) and the fixed mold mechanism (3) and is arranged to penetrate the housing (1), wherein: A smoothing mechanism (4) is provided in the housing (1), and two smoothing mechanisms (4) are provided and are respectively arranged on the upper and lower sides of the fixed mold mechanism (3). The smoothing mechanisms (4) are clamped on the covering layer (5) and move up and down to level the covering layer (5); The smoothing mechanism (4) comprises two smoothing brackets (41) respectively located on the left and right sides of the covering layer (5); a smoothing plate (411) is provided between the two smoothing brackets (41) for sliding up and down; the covering layer (5) passes through the two sets of smoothing plates (411); a smoothing clamp (413) for clamping the covering layer (5) is rotatably provided on the smoothing plates (411); a smoothing spring (414) for providing a clamping force is provided between the smoothing plates (411) and the smoothing clamp (413); a connecting slider (412) is provided on the lower smoothing plate (411); the connecting slider (412) performs reciprocating linear motion in the up and down directions as the movable mold mechanism (2) moves left and right; A steering groove wheel (421) is rotatably provided on the upper smoothing bracket (41), a synchronous rope (42) is provided on the connecting slider (412) and is steered via the steering groove wheel (421) and connected to the upper smoothing plate (411), a synchronous spring (422) is sleeved on the synchronous rope (42), one end of the synchronous spring (422) is connected to the smoothing bracket (41), and the other end is connected to the smoothing plate (411); A winding roller (44) is rotatably provided on the outer side of the housing (1) and rotates unidirectionally with the movable mold mechanism (2) to wind up the covering layer (5).

2. The low-pressure injection molding equipment for automotive interior parts according to claim 1, characterized in that: The outer side of the housing (1) is provided with a linkage mechanism (6) which moves with the movable mold mechanism (2) and drives the connecting slider (412) to perform reciprocating linear motion. The linkage mechanism (6) comprises a linkage slider (61) slidably arranged on the housing (1). The linkage slider (61) is connected to the movable mold mechanism (2). A linkage rack (611) is arranged on the outer side of the linkage slider (61). A linkage rotating column (613) is rotatably arranged on the housing (1). A linkage gear (614) meshing with the linkage rack (611) is arranged on one side of the linkage rotating column (613). A linkage rotating arm (615) is arranged on the other side of the linkage rotating column (613). A linkage protrusion (616) is arranged on one end of the linkage rotating arm (615). The housing (1) is slidably provided with a longitudinal slide block (62) connected to the connecting slide block (412), the longitudinal slide block (62) is provided with a matching connecting rod (622), and the matching connecting rod (622) is provided with a matching sliding groove (623) slidably matched with the linkage protrusion (616).

3. The low-pressure injection molding equipment for automotive interior parts according to claim 2, characterized in that: A one-way rotating disk (441) is provided on one side of the winding roller (44), and a plurality of groups of one-way teeth are provided on the inner side of the one-way rotating disk (441) at equal intervals along the circumferential direction of the one-way rotating disk (441). A driving rotating disk (64) is rotatably provided on the housing (1) and rotates in a circle with the movement of the movable mold mechanism (2). A mounting slide groove (641) is provided in the driving rotating disk (64), and a driving slider (643) is slidably provided in the mounting slide groove (641) and cooperates with the one-way teeth to drive the one-way rotating disk (441) to rotate in a one-way direction. A mounting spring (642) connected to the driving slider (643) is provided in the mounting slide groove (641).

4. The low-pressure injection molding equipment for automotive interior parts according to claim 2, characterized in that: The movable mold mechanism (2) comprises a movable mold mounting plate (21) slidably arranged in the housing (1); a movable mold support plate (22) is provided on the side of the movable mold mounting plate (21) close to the fixed mold mechanism (3); an injection molding groove (221) is provided on the movable mold support plate (22); and an injection molding tube (222) is provided on the movable mold support plate (22); the fixed mold mechanism (3) comprises a fixed mold mounting plate (31) arranged in the housing (1); a fixed mold support plate (32) is provided on the side of the fixed mold mounting plate (31) close to the movable mold mechanism (2); an injection molding protrusion (33) cooperating with the injection molding groove (221) is provided on the fixed mold support plate (32); the injection molding protrusion (33) is a hollow structure; the injection molding protrusion (33) reciprocates with the movable mold mounting plate (21) to adsorb and release the covering layer (5).

5. The low-pressure injection molding equipment for automobile interior decoration parts according to claim 4, characterized in that: A cutter support (23) is slidably provided on the movable mold support plate (22), the cutter support (23) is arranged around the injection molding groove (221), a cutter spring (231) connected to the cutter support (23) is provided on the movable mold support plate (22), and a cutter blade (232) is provided on the cutter support (23).

6. The low-pressure injection molding equipment for automobile interior decoration parts according to claim 4, characterized in that: A leveling bracket (24) is symmetrically slidably provided on the movable mold support plate (22), a leveling pressure rod (242) is provided on the leveling bracket (24) for pressing the covering layer (5) toward the fixed mold support plate (32), a material pressing spring (241) connected to the leveling bracket (24) is provided on the movable mold support plate (22), a leveling rotating plate (243) is rotatably provided on the leveling pressure rod (242), a leveling roller (244) is rotatably provided on the leveling rotating plate (243), and a leveling spring (245) connected to the leveling rotating plate (243) is provided on the leveling bracket (24).

7. The low-pressure injection molding equipment for automobile interior decoration parts according to claim 4, characterized in that: The injection molding convex block (33) is provided with an adsorption through hole (331), the fixed mold support plate (32) is provided with an adsorption cavity (332) connected to the adsorption through hole (331), a sealing piston (333) is provided in the adsorption cavity (332) for sealing and sliding, an adsorption block (334) is provided at one end of the sealing piston (333) extending out of the adsorption cavity (332), and a linkage support rod (612) connected to the adsorption block (334) is provided on the linkage slider (61).

8. The low-pressure injection molding equipment for automobile interior decoration parts according to claim 4, characterized in that: A material removal spring (112) is provided in the housing (1), a material removal plate (11) is provided at the upper end of the material removal spring (112), a vibration convex block (111) connected to the material removal spring (112) is provided at the lower end of the material removal plate (11), vibration support arms (211) are provided on both sides of the movable mold mounting plate (21), and a vibration top block (212) cooperating with the vibration convex block (111) is provided on the vibration support arms (211).

9. The low-pressure injection molding equipment for automobile interior decoration parts according to claim 3, characterized in that: A longitudinal rack (621) is provided on one side of the longitudinal slider (62); a longitudinal gear (63) meshing with the longitudinal gear (621) is rotatably provided on the housing (1); a longitudinal groove wheel (631) is provided on the inner side of the longitudinal gear (63); a linkage groove wheel (65) is rotatably provided on the housing (1); a longitudinal transmission belt (632) is provided between the linkage groove wheel (65) and the longitudinal groove wheel (631); a reversing groove wheel (651) is provided on the outer side of the linkage groove wheel (65); a driving groove wheel (644) is provided on the outer side of the driving rotary disc (64); a linkage transmission belt (652) is provided between the driving groove wheel (644) and the reversing groove wheel (651).

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