Double-color automotive upholstery manufacturing process based on multidirectional core-pulling mechanism

Abstract

According to the double-color automobile interior trim part manufacturing process based on the multi-direction core pulling mechanism, the first-color station and the second-color station are arranged in the mold body, the two stations are provided with the lower mold cores and the core rotating mechanism between the two lower mold cores correspondingly, and therefore mold opening or mold closing can be achieved on the two stations at the same time only by operating the step 2 and the step 6; the steps are reduced, the occupied space of the mold is reduced, the step 5 is operated through the core rotating mechanism, two lower mold cores exchange stations, and the transfer time is shortened; the four-direction core pulling mechanism comprises a large core pulling sliding block, a small core pulling sliding block and a shovel base assembly, under the condition that only the large core pulling sliding block has power, necessary core pulling is achieved on the two stations at the same time by operating the step 3, necessary core pulling reset is achieved on the two stations at the same time by operating the step 7, the steps of multi-direction core pulling are reduced, and the production efficiency is improved. The overall occupied space of the mold is reduced; in addition, through the arrangement of a two-color station lower ejection mechanism and the operation of the step 4, finished products of the two-color station are taken out.

Description

Technical Field

[0001] The invention relates to the technical field of manufacturing two-color automobile interior decoration parts, and in particular to a manufacturing process of two-color automobile interior decoration parts based on a multi-directional core pulling mechanism. Background Art

[0002] Two-shot injection molding is a molding technology that achieves a composite structure by injecting two different materials (such as plastics of different colors and hardness) into the same mold in batches or simultaneously. It is widely used in electronic products, automotive parts, medical equipment and other fields to improve product functionality and aesthetics.

[0003] In the manufacture of automotive interior parts, it is common to encounter interior parts that use two materials and require multi-directional core pulling to form multi-faceted features, such as high-gloss two-color dial buttons, which require two plastic injection molding, and all four sides need to be molded into corresponding structures through core pulling. When manufacturing such products, the existing process often requires two molds to achieve the two materials and multi-directional core pulling at the same time. The two molds are respectively used for the steps of mold closing, injection molding, and mold opening. The transfer of semi-finished products between the two molds will make the mold itself have more production steps and the two molds occupy a larger space. In addition, multi-directional core pulling must be achieved in both molds, and multi-directional core pulling often requires power sources in different directions to be implemented step by step, which further increases the production steps. Due to the above factors, the production efficiency of two-color automotive interior parts is ultimately low. Summary of the invention

[0004] The problem to be solved by the present invention is to provide a two-color automobile interior decoration manufacturing process based on a multi-directional core pulling mechanism, which has fewer production steps for the mold itself, occupies less mold space, and has fewer multi-directional core pulling steps.

[0005] The technical solution adopted by the present invention to solve the above problems is: a two-color automobile interior decoration manufacturing process based on a multi-directional core pulling mechanism, comprising a mold body, wherein the mold body has a single-color station and a two-color station inside; the single-color station and the two-color station are respectively provided with a lower mold core, and the lower mold core has at least one cavity; It also includes a core rotating mechanism arranged between the two lower mold cores, two sets of four-way core pulling mechanisms respectively arranged at the one-color station and the two-color station, and an ejection mechanism arranged at the two-color station; the four-way core pulling mechanism includes two large core pulling sliders arranged at the front and rear ends of the cavity and two small core pulling sliders on the left and right sides, and a shovel base assembly arranged on the large core pulling slider; The manufacturing process includes the following steps: Step 1, initial state: in the mold closing state, a primary injection molding is completed in the mold cavity of the one-color station to form a semi-finished product, and a secondary injection molding is completed in the mold cavity of the two-color station to form a finished product; Step 2: Open the mold; Step 3, four-way core pulling: the two large core pulling sliders of the one-color station move away from the cavity respectively, and the two small core pulling sliders are stationary, so that the semi-finished product can achieve front and rear core pulling; at the same time, the two large core pulling sliders of the two-color station move away from the cavity respectively, and the two large core pulling sliders drive the two small core pulling sliders to move away from the cavity through the shovel base assembly, so that the finished product can achieve four-way core pulling; Step 4, ejection: the ejection mechanism below the two-color station ejects the finished product; Step 5, switching positions: the core rotating mechanism lifts up and rotates the two lower mold cores so that the two lower mold cores exchange positions; Step 6: mold closing; Step 7, four-way core pulling reset: the two large core pulling sliders of the one-color station move toward the direction close to the cavity respectively, and the two small core pulling sliders are driven by the shovel base assembly to move toward the direction close to the cavity, so as to realize the four-way core pulling reset of the one-color station; at the same time, the two large core pulling sliders of the two-color station move toward the direction close to the cavity respectively, and the two small core pulling sliders are stationary, so as to realize the front and rear core pulling reset of the two-color station; Step 8, injection molding: the injection molding machine simultaneously performs primary injection molding on the cavity of the one-color station and secondary injection molding on the cavity of the two-color station; Step 9: Repeat steps 1-8.

[0006] Compared with the prior art, the present invention sets a one-color station and a two-color station inside a mold body, and lower mold cores are respectively provided in the one-color station and the two-color station, and a core-turning mechanism between the two lower mold cores. Under this setting, one mold body only needs to run steps 2 and 6 to simultaneously open or close the mold for the one-color station and the two-color station. Compared with two sets of molds opening or closing the molds separately, the number of steps is reduced, and the space occupied by the mold is reduced. By running step 5 through the core-turning mechanism, the two lower mold cores can exchange the stations. Compared with transferring the semi-finished products between the two sets of molds through other equipment, the transfer time is shortened and the overall space occupied by the mold is reduced. The present invention also has two sets of four The four-way core pulling mechanism and the ejection mechanism, wherein the four-way core pulling mechanism includes a large core pulling slider, a small core pulling slider and a shovel base assembly. When only the large core pulling slider has power, the necessary core pulling is achieved for the two stations at the same time by running step 3, and the necessary core pulling and resetting are achieved for the two stations at the same time by running step 7, so that the steps of multi-directional core pulling are reduced, the power source of the mold is reduced, and the overall space occupied by the mold is further reduced; in addition, through the setting of the ejection mechanism under the two-color station and the operation of step 4, the finished product of the two-color station is taken out, and the two-color station is vacant, providing conditions for the lower mold core of the two-color station to be transferred back to the one-color station for injection molding of semi-finished products.

[0007] According to one embodiment of the present invention, it also includes upper mold cores respectively arranged at the one-color station and the two-color station and respectively cooperating with the two lower mold cores; The mold body comprises a lower mold assembly and an upper mold assembly; the lower mold core is arranged on the lower mold assembly, and the upper mold core is arranged on the upper mold assembly; In step 2, the upper mold assembly drives the upper mold core to move upward; In step 6, the upper mold assembly drives the upper mold core to move downward.

[0008] According to an embodiment of the present invention, the core rotating mechanism includes a core rotating plate fixing seat, a core rotating guide sleeve and a core rotating body arranged in sequence from top to bottom; the two lower mold cores are respectively arranged on both sides of the core rotating plate fixing seat; step 5 includes the following sub-steps: Step 51: The rotating core body drives the two lower mold cores to rise via the rotating core plate fixing seat; Step 52: The rotating core body drives the two lower mold cores to rotate 180 degrees via the rotating core plate fixing seat; Step 53: The rotating core body drives the two lower mold cores to fall through the rotating core plate fixing seat, so that the lower mold core of the one-color station and the lower mold core of the two-color station switch positions.

[0009] According to one embodiment of the present invention, the ejection mechanism includes a large ejector plate and a plurality of ejector columns and a plurality of limit columns arranged on the large ejector plate; the lower mold core further includes a small ejector plate; the small ejector plate includes a small ejector plate body and a small ejector arranged in the small ejector plate body; In step 4, the large ejector plate drives the small ejector to move upward via the ejector column so as to eject the finished product in the two-color station.

[0010] According to one embodiment of the present invention, the small ejector plate further comprises a locking block disposed on one side of the small ejector plate body; The four-way core-pulling mechanism further comprises a plurality of small ejector plate locking blocks following the core-pulling large slider; the side of the small ejector plate locking block has a locking groove; the locking groove cooperates with the locking block; In step 3, the core-pulling large slide blocks of the one-color station and the two-color station drive the small ejector plate locking block to move away from the cavity so that the locking block withdraws from the locking groove; In step 7, the core-pulling large slide blocks of the one-color station and the two-color station drive the small ejector plate locking block to move toward the direction close to the cavity so that the locking block enters the locking groove.

[0011] According to one embodiment of the present invention, the lower die core has two cavities arranged on the left and right; the lower die core includes two lower die core inserts, which are respectively arranged in the cavities; the large core-pulling slider includes two slider heads arranged on the left and right, and the two slider heads correspond to the two cavities respectively; each cavity is provided with two small core-pulling sliders.

[0012] According to one embodiment of the present invention, the lower mold core further includes a plurality of small slider guide rails; one of the small slider guide rails is provided on both sides of each cavity; In step 3 and step 7, the core-pulling small slider slides left and right in the small slider guide rail.

[0013] According to an embodiment of the present invention, the small slider guide rail includes a first guide rail and a second guide rail; the first guide rail is arranged on both sides of the lower mold core, and the second guide rail is arranged between the two cavities; the first guide rail is provided with one core-pulling small slider, and the second guide rail is provided with two core-pulling small sliders; The core-pulling small slider has an inclined groove, and the inclined groove includes a first inclined surface and a bottom surface; the core-pulling small slider includes an elastic shifting block arranged on the bottom surface; In step 3 and step 7, the shovel base assembly moves back and forth in the inclined groove along with the large core-pulling slider. When pulling the core, the elastic shift block drives the small core-pulling slider to pull the core. When resetting, the small core-pulling slider is driven to reset through the first inclined surface.

[0014] According to one embodiment of the present invention, the shovel base assembly includes a single-sided shovel base and a double-sided shovel base; the single-sided shovel base cooperates with the first guide rail, and the double-sided shovel base cooperates with the second guide rail; the single-sided shovel base includes a single-sided shovel base at a single-color station and a single-sided shovel base at a two-color station, and the double-sided shovel base includes a double-sided shovel base at a single-color station and a double-sided shovel base at a two-color station; The one-color station single-sided shovel base has one avoidance groove and one second inclined surface, and the one-color station double-sided shovel base has two avoidance grooves and two second inclined surfaces; The two-color station single-sided shovel base has a control groove and a third inclined surface, and the two-color station double-sided shovel base has two control grooves and two third inclined surfaces; In step 3, the two large core-pulling sliders of the one-color station drive the single-sided shovel base and the double-sided shovel base of the one-color station to move forward and backward, and the two small core-pulling sliders remain stationary. The two large core-pulling sliders of the two-color station drive the single-sided shovel base and the double-sided shovel base of the two-color station to move forward and backward, and the two small core-pulling sliders move left and right to complete the core pulling; In step 7, the two large core-pulling sliders of the one-color station drive the single-sided shovel base and the double-sided shovel base of the one-color station to move forward and backward, and the two small core-pulling sliders are reset under the action of the first inclined surface and the second inclined surface; the two large core-pulling sliders of the two-color station drive the single-sided shovel base and the double-sided shovel base of the two-color station to move forward and backward, and the two small core-pulling sliders are reset under the action of the first inclined surface and the third inclined surface.

[0015] According to one embodiment of the present invention, the four-way core pulling mechanism further comprises an oil cylinder and a transmission rod disposed on the oil cylinder; In step 3 and step 7, the oil cylinder drives the core-pulling large slider to move via the transmission rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A process flow chart according to a preferred embodiment of the present invention; Figure 2 It is a three-dimensional schematic diagram of a multi-directional core-pulling two-color injection mold according to a preferred embodiment of the present invention; Figure 3 It is a three-dimensional schematic diagram of a multi-directional core-pulling two-color injection mold after hiding the upper mold component according to a preferred embodiment of the present invention; Figure 4 A three-dimensional schematic diagram of the internal structure of a preferred embodiment of the present invention from a side view; Figure 5 A schematic top view of the internal structure of a preferred embodiment of the present invention; Figure 6 is a three-dimensional schematic diagram of the internal structure of a preferred embodiment of the present invention from another side perspective; Figure 7 It is a three-dimensional schematic diagram of a core rotating mechanism and two lower mold cores according to a preferred embodiment of the present invention; Figure 8 It is an exploded schematic diagram of a core-pulling small slider according to a preferred embodiment of the present invention; Fig. 9 It is a three-dimensional schematic diagram of a shovel base assembly according to a preferred embodiment of the present invention; Fig.10 A cross-sectional schematic diagram of the location of the locking block of the small ejector plate according to a preferred embodiment of the present invention; Fig.11 It is a cross-sectional schematic diagram of the location of the shovel base assembly according to a preferred embodiment of the present invention; Fig.12 A state diagram of step 1 according to a preferred embodiment of the present invention; Fig.13 A state diagram of step 3 according to a preferred embodiment of the present invention; Fig.14A state diagram of step 4 according to a preferred embodiment of the present invention; Fig.15 is a state diagram of step 51 according to a preferred embodiment of the present invention; Fig.16 is a state diagram of step 52 according to a preferred embodiment of the present invention; Fig.17 is a state diagram of step 53 according to a preferred embodiment of the present invention; Fig.18 A state diagram of step 7 according to a preferred embodiment of the present invention; Fig.19 FIG. 4 is a three-dimensional schematic diagram of a two-color plastic product according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0017] Before describing in detail any embodiment of the present invention, it should be understood that the present invention is not limited in its application to the construction and arrangement details of the components described below or illustrated in the following figures. The present invention can have other embodiments and can be practiced or carried out in various ways. In addition, it should be understood that the words and terms used here are for descriptive purposes and should not be considered restrictive. The use of "including" or "having" and its variations herein is intended to cover the items and their equivalents and additional items displayed below. Unless otherwise specified or limited, the terms "install", "connect", "support" and "couple" and their variations are widely used and cover direct installation and indirect installation, connection, support and connection. In addition, "connect" and "couple" are not limited to physical or mechanical connections or connections.

[0018] Furthermore, on the first aspect, in the disclosure of the present invention, the orientation or positional relationship indicated by terms such as "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore the above terms cannot be understood as limitations on the present invention; on the second aspect, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" cannot be understood as a limitation on the quantity.

[0019] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

[0020] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0021] See also Figure 1-19 A two-color automotive interior manufacturing process based on a multi-directional core pulling mechanism is shown, comprising a mold body 1, wherein the mold body 1 has a single-color station 11 and a two-color station 12; a lower mold core 3 is respectively disposed in the single-color station 11 and the two-color station 12, and the lower mold core 3 has at least one cavity; It also includes a core rotating mechanism 2 arranged between two lower mold cores 3, two sets of four-way core pulling mechanisms 4 respectively arranged at the one-color station 11 and the two-color station 12, and an ejection mechanism 5 arranged at the two-color station 12; the four-way core pulling mechanism 4 includes two large core pulling sliders 41 arranged at the front and rear ends of the cavity and two small core pulling sliders 42 at the left and right sides, and a shovel base assembly 43 arranged on the large core pulling slider 41; The manufacturing process includes the following steps: Step 1, initial state: Fig.12 As shown, in the mold closing state, the first injection molding is completed in the mold cavity of the one-color station 11 to form a semi-finished product, and the second injection molding is completed in the mold cavity of the two-color station 12 to form a finished product; Step 2: Open the mold; Step 3, four-way core pulling: Fig.13 As shown, the two large core-pulling sliders 41 of the one-color station 11 move in a direction away from the cavity, and the two small core-pulling sliders 42 are stationary, so that the semi-finished product can achieve front and rear core pulling; at the same time, the two large core-pulling sliders 41 of the two-color station 12 move in a direction away from the cavity, and the two large core-pulling sliders 41 drive the two small core-pulling sliders 42 to move in a direction away from the cavity through the shovel base assembly 43, so that the finished product can achieve four-way core pulling; Step 4: Ejection: Fig.14 As shown, the ejection mechanism 5 below the two-color station 12 ejects the finished product; Step 5: Switch workstations: Fig.15 , Fig.16 , Fig.17 As shown, the core rotating mechanism 2 lifts up and rotates the two lower mold cores 3 so that the two lower mold cores 3 exchange positions; Step 6: mold closing; Step 7: Four-way core pulling reset: Fig.18As shown, the two large core-pulling sliders 41 of the one-color station 11 move toward the direction close to the cavity respectively, and the two small core-pulling sliders 42 are driven by the shovel base assembly 43 to move toward the direction close to the cavity, so as to realize the four-way core-pulling reset of the one-color station 11; at the same time, the two large core-pulling sliders 41 of the two-color station 12 move toward the direction close to the cavity respectively, and the two small core-pulling sliders 42 are stationary, so as to realize the front and rear core-pulling reset of the two-color station 12; Step 8, injection molding: the injection molding machine simultaneously performs primary injection molding on the cavity of the one-color station 11 and secondary injection molding on the cavity of the two-color station 12; Step 9: Repeat steps 1-8.

[0022] Please continue reading Fig.19 , which shows a two-color plastic product 6 according to a preferred embodiment of the present invention. The two-color plastic product 6 includes two first core-pulling surfaces 61 at the front and rear and two second core-pulling surfaces 62 at the left and right. The two first core-pulling surfaces 61 are formed by two large core-pulling sliders 41 set at the front and rear, respectively, and the two second core-pulling surfaces 62 are formed by two small core-pulling sliders 42 set at the left and right, respectively.

[0023] Based on the characteristics of the core pulling in four directions of the front, back, left, and right of the aforementioned two-color plastic product 6, in actual use, the present invention sets a single-color station 11 and a two-color station 12 inside a mold body 1, and the single-color station 11 and the two-color station 12 are respectively provided with lower mold cores 3, and a core rotating mechanism 2 between the two lower mold cores 3. Under this setting, a mold body 1 only needs to run steps 2 and 6 to simultaneously open or close the mold for the single-color station 11 and the two-color station 12. Compared with two sets of molds opening or closing the molds separately, the number of steps is reduced, and the space occupied by the mold is reduced. By running step 5 through the core rotating mechanism 2, the two lower mold cores 3 can be interchanged. Compared with the semi-finished products being transported between the two sets of molds through other equipment, the transportation time is shortened and the overall space occupied by the mold is reduced. The present invention is also provided with two sets of four-way core pulling mechanisms 4 and ejection mechanisms 5, wherein the four-way core pulling mechanisms 4 include a large core pulling slider 41, a small core pulling slider 42 and a shovel base assembly 43. When only the large core pulling slider 41 has power, the necessary core pulling is achieved for the two stations at the same time by running step 3, and the necessary core pulling and resetting are achieved for the two stations at the same time by running step 7, so that the steps of multi-directional core pulling are reduced, the power source of the mold is reduced, and the overall space occupied by the mold is further reduced; in addition, through the setting of the ejection mechanism 5 under the two-color station 12 and the operation of step 4, the finished product of the two-color station 12 is taken out, and the two-color station 12 is vacant, providing conditions for the lower mold core 3 of the two-color station 12 to be transferred back to the one-color station 11 for semi-finished product injection molding.

[0024] It is worth mentioning that please refer to Fig.12, record the initial state of the state in which the one-color station 11 and the two-color station 12 have completed their respective injection molding in the mold closing state, so as to demonstrate the subsequent steps of mold opening, four-way core pulling, ejection, station switching, mold closing, four-way core pulling reset and injection molding. After the injection molding of step 8 is completed, the entire mold returns to the initial state of step 1, and then periodically produces the two-color plastic product 6.

[0025] Please continue reading Figure 2 , Figure 3 , which also includes an upper mold core 7 which is respectively arranged at the one-color station 11 and the two-color station 12 and cooperates with the two lower mold cores 3; The mold body 1 includes a lower mold assembly 13 and an upper mold assembly 14; the lower mold core 3 is arranged on the lower mold assembly 13, and the upper mold core 7 is arranged on the upper mold assembly 14; In step 2, the upper mold assembly 14 drives the upper mold core 7 to move upward; In step 6, the upper die assembly 14 drives the upper die core 7 to move downward.

[0026] It can be understood that the two upper mold cores 7 are both arranged on the upper mold assembly 14, and the upper mold assembly 14 synchronously drives the up and down movements of the one-color station 11 and the two-color station 12 through mold opening and mold closing actions, which improves the efficiency of mold opening and mold closing compared to opening and closing the two sets of molds separately.

[0027] Please continue reading Figure 6 , 7 , wherein the core rotating mechanism 2 comprises a core rotating plate fixing seat 21, a core rotating guide sleeve 22 and a core rotating body 23 arranged in sequence from top to bottom; the two lower mold cores 3 are respectively arranged on both sides of the core rotating plate fixing seat 21; further, a power mechanism is externally connected to the lower side of the core rotating body 23, and the power mechanism is used to realize the lifting, rotating and falling actions of the core rotating body 23; Step 5 contains the following sub-steps: Step 51: See Fig.15 The rotating core body 23 drives the two lower mold cores 3 to rise through the rotating core plate fixing seat 21; Step 52: See Fig.16 The rotating core body 23 drives the two lower mold cores 3 to rotate 180° through the rotating core plate fixing seat 21; Step 53: See Fig.17 The rotating core body 23 drives the two lower mold cores 3 to fall through the rotating core plate fixing seat 21, so that the lower mold core 3 of the one-color station 11 and the lower mold core 3 of the two-color station 12 switch positions.

[0028] Please continue reading Figure 6 , Fig.11, wherein the ejection mechanism 5 includes a large ejector plate 51 and a plurality of ejector columns 52 and a plurality of limit columns 53 arranged on the large ejector plate 51; the lower mold core 3 further includes a small ejector plate 33; the small ejector plate 33 includes a small ejector plate body 331 and a small ejector 332 arranged in the small ejector plate body 331; it can be understood that the two-color plastic product 6 is firstly formed by the first injection molding at the one-color station 11 to form a semi-finished product, and then the second injection molding is completed at the two-color station 12 and on the periphery of the semi-finished product to form a finished product, so the ejection mechanism 5 is only arranged below the two-color station 12, wherein a power mechanism is connected below the large ejector plate 51, under the action of the power mechanism, the large ejector plate 51 drives the plurality of ejector columns 52 to move up and down, and the function of the plurality of limit columns 53 is to cooperate with the lower end surface of the lower mold core 3 to prevent the large ejector plate 51 from excessive movement; Please continue reading Fig.14 In step 4, the large ejector plate 51 drives the small ejector 332 to move upward through the ejector column 52 to eject the finished product in the two-color station 12; continue to refer to Fig.15 It can be seen that when the rotating core body 23 lifts the two lower mold cores 3 in step 51, the semi-finished product of the one-color station 11 does not move, and the finished product of the two-color station 12 has been taken out, so that the lower mold core 3 of the two-color station 12 is vacant, so that the lower mold core 3 can be transferred back to the one-color station 11 for semi-finished product injection molding.

[0029] Please continue reading Figure 8 , Fig.10 , Fig.11 , wherein the small ejector plate 33 further includes a locking block 333 disposed on one side of the small ejector plate body 331; The four-way core-pulling mechanism 4 further comprises a plurality of small ejector plate locking blocks 44 following the core-pulling large slider 41; the side of the small ejector plate locking block 44 has a locking groove 441; the locking groove 441 cooperates with the locking block 333; It is understandable that when the injection molded product is being formed, the injection pressure of the molten plastic raw material is relatively large. Therefore, each movable part in the cavity must be provided with a locking mechanism to resist the injection pressure of the raw material to prevent the movable parts from shifting during the injection of the raw material; in this embodiment, the large core-pulling slider 41 can be locked by the lower mold assembly 13, the upper mold assembly 14 and the cylinder 45 after the mold is closed, and the small core-pulling slider 42 can be locked by inserting the shovel base assembly 43 into the inclined groove 421 after the mold is closed, and the small ejector 332 in the lower mold core insert 31 is still in a free state, and may still shift when facing the injection of raw materials. Therefore, the small ejector plate 33 includes a locking block 333, and the four-way core-pulling mechanism 4 includes a small ejector plate locking block 44, and the side of the small ejector plate locking block 44 has a locking groove 441.

[0030] In step 3, while the four-way core pulling mechanism 4 completes the four-way core pulling action, the large core pulling sliders 41 of the one-color station 11 and the two-color station 12 drive the small ejector plate locking block 44 to move away from the cavity, so that the locking block 333 withdraws from the locking groove 441. Only when the locking block 333 withdraws from the locking groove 441 and is unlocked can the ejection action of step 4 be realized; and since the unlocking step of the locking block 333 is completed synchronously with the four-way core pulling step of step 3, no additional time is taken, which is beneficial to improving production efficiency.

[0031] In step 7, while the four-way core pulling mechanism 4 completes the four-way core pulling resetting action, the large core pulling sliders 41 of the one-color station 11 and the two-color station 12 drive the small ejector plate locking block 44 to move toward the direction close to the cavity, so that the locking block 333 enters the locking groove 441. Only when the locking block 333 enters the locking groove 441 and locks, the small ejector 332 will not be displaced during the injection molding process of step 7; and because the locking step of the locking block 333 is completed synchronously with step 7, no additional time is taken, which is beneficial to improving production efficiency.

[0032] Please continue reading Figure 4-7 The lower die core 3 has two cavities arranged on the left and right; the lower die core 3 includes two lower die core inserts 31, which are respectively arranged in the cavities; the large core-pulling slider 41 includes two slider heads 411 arranged on the left and right, and the two slider heads 411 correspond to the two cavities respectively; each cavity is provided with two small core-pulling sliders 42.

[0033] Specifically, in this embodiment, two cavities are arranged on each lower mold core 3, and two slider heads 411 and two core-pulling small sliders 42 are respectively arranged on the four sides of each cavity, so that a single lower mold core 3 can be used for injection molding two two-color plastic products 6 at the same time, and the action of the lower mold core 3 is switched by the core rotating mechanism 2, so that the one-color molding of the two two-color plastic products 6 can be completed at the one-color station 11 at the same time, and then the two-color molding of the two two-color plastic products 6 can be completed at the two-color station 12 at the same time, so that the production efficiency of the entire multi-directional core-pulling two-color injection mold is higher.

[0034] It is understandable that in other embodiments, each lower mold core 3 can also be provided with three or more cavities, and each cavity is respectively provided with two slider heads 411 and two core-pulling small sliders 42 on the four sides, so that a single lower mold core 3 can simultaneously injection mold three or more two-color plastic products 6.

[0035] Please continue reading Figure 7, wherein the lower mold core 3 further comprises a plurality of small slider guide rails 32; each cavity is provided with one small slider guide rail 32 on both sides; specifically, the plurality of small slider guide rails 32 are fixed to the lower mold core 3 by fasteners, each cavity is provided with one small slider guide rail 32 on both sides, and the core-pulling small slider 42 can slide left and right in the small slider guide rail 32. Under this arrangement, the core-pulling small sliders 42 on both sides have carriers, and the stable operation of the core-pulling small sliders 42 is ensured; In step 3 and step 7, the core-pulling small slider 42 slides left and right in the small slider guide rail 32.

[0036] Please continue reading Figure 7 , Figure 8 , Fig. 9 , the small slider guide rail 32 includes a first guide rail 321 and a second guide rail 322; the first guide rail 321 is arranged on both sides of the lower mold core 3, and the second guide rail 322 is arranged between the two cavities; the first guide rail 321 is provided with a core-pulling small slider 42, and the second guide rail 322 is provided with two core-pulling small sliders 42; The core-pulling small slider 42 has an inclined groove 421, and the inclined groove 421 includes a first inclined surface 4211 and a bottom surface 4212; the core-pulling small slider 42 includes an elastic shifting block 422 arranged on the bottom surface 4212; In step 3 and step 7, the shovel base assembly 43 moves back and forth in the inclined groove 421 along with the large core-pulling slider 41. When pulling the core, the elastic shift block 422 drives the small core-pulling slider 42 to pull the core. When resetting, the small core-pulling slider 42 is driven to reset through the first inclined surface 4211.

[0037] Specifically, since in the present embodiment, each lower mold core 3 is provided with two cavities, a first guide rail 321 is respectively provided at the edge positions on both sides of the lower mold core 3, and a second guide rail 322 is provided at the middle position of the lower mold core 3, i.e., between the two cavities, and the structure of the second guide rail 322 is a combination of the structures of the two first guide rails 321, serving the left and right cavities respectively. Under this arrangement, not only is the space between the two cavities that originally requires two first guide rails 321 compressed to only require one second guide rail 322, thereby reducing the volume of the mold, but also because the second guide rail 322 is formed by combining two first guide rails 321 to reduce the complexity of the structure, the simpler structure is also smoother and less prone to failure during the implementation of steps 3 and 7.

[0038] Please continue reading Figure 5-11, wherein the shovel base assembly 43 includes a single-sided shovel base 431 and a double-sided shovel base 432; the single-sided shovel base 431 cooperates with the first guide rail 321, and the double-sided shovel base 432 cooperates with the second guide rail 322; the single-sided shovel base 431 includes a single-sided shovel base 431a for a single-color station and a single-sided shovel base 431b for a two-color station, and the double-sided shovel base 432 includes a double-sided shovel base 432a for a single-color station and a double-sided shovel base 432b for a two-color station; The one-color station single-sided shovel base 431a has one avoidance groove and one second inclined surface, and the one-color station double-sided shovel base 432a has two avoidance grooves and two second inclined surfaces; The two-color station single-sided shovel base 431b has a control groove and a third inclined surface, and the two-color station double-sided shovel base 432b has two control grooves and two third inclined surfaces; It can be understood that the two-color plastic product 6 is formed by first completing the first injection molding at the one-color station 11 to form a semi-finished product, and then completing the second injection molding at the two-color station 12 and on the periphery of the semi-finished product to form a finished product; since the slider head 411 of the core-pulling large slider 41 involves the appearance characteristics of the two-color plastic product 6, the slider head 411 of the one-color station 11 matches the characteristics of the semi-finished product formed by the first injection molding, and the slider head 411 of the two-color station 12 matches the characteristics of the finished product formed by the second injection molding, and the slider heads 411 of the two stations must be designed to be different; and the core-pulling small slider 42 includes a primary side molding block 423 and a secondary side molding block 424. When the semi-finished product is formed by the first injection molding, it can be formed by the primary side molding block 423, and when the finished product is formed by the second injection molding, it can be formed by the secondary side molding block 424, such as Figure 13-16 As shown in the enlarged view of , under this setting, after the core-pulling small slider 42 completes the first injection molding to form a semi-finished product at the first-color station 11, it is not necessary to pull the core again, but it can be directly transferred to the second-color station 12 through the core transfer mechanism 2 for the second injection molding, thereby making the manufacturing process of the first-color station 11 simpler; Furthermore, since the structure of the entire lower mold core 3 is completely the same and can be used in common at the one-color station 11 and the two-color station 12 through the core rotating mechanism 2, and the core-pulling small slider 42 does not need to pull the core at the one-color station 11, but must pull the core at the two-color station 12, in order to achieve the above-mentioned functions, the single-sided shovel base 431 is designed to include a single-sided shovel base 431a for the one-color station and a single-sided shovel base 431b for the two-color station, and the double-sided shovel base 432 is designed to include a double-sided shovel base 432a for the one-color station and a double-sided shovel base 432b for the two-color station; Please continue reading Fig.11The enlarged view in the upper right corner shows that the single-sided shovel base 431a of the one-color station has an avoidance groove and a second inclined surface, and the double-sided shovel base 432a of the one-color station has two avoidance grooves and two second inclined surfaces. The function of the avoidance groove is to avoid the elastic puller block 422 of the core-pulling small slider 42 in the one-color station 11, so that the core-pulling small slider 42 in the one-color station 11 will not be pulled out along with the core-pulling large slider 41. The function of the second inclined surface is to be pressed and matched with the first inclined surface 4211, so that the core-pulling small slider 42 that has been pulled out and turned back from the two-color station 12 is reset, and the core-pulling small slider 42 is locked during the injection molding process; Please continue reading Fig.11 The enlarged view in the upper left corner shows that the two-color station single-sided shovel base 431b of the two-color station 12 has a control groove and a third inclined surface, and the two-color station double-sided shovel base 432b has two control grooves and two third inclined surfaces. The function of the control groove is to interact with the elastic puller block 422 of the core-pulling small slider 42 in the two-color station 12, so that the core-pulling small slider 42 in the two-color station 12 is pulled out along with the core-pulling large slider 41. The function of the third inclined surface is to squeeze and cooperate with the first inclined surface 4211, so that the core-pulling small slider 42 is locked during the injection molding process; Based on the above considerations, in step 3, if Fig.13 As shown in the enlarged view in the upper left corner, the two large core-pulling sliders 41 of the one-color station 11 drive the one-color station single-sided shovel base 431a and the one-color station double-sided shovel base 432a to move forward and backward, and the two small core-pulling sliders 42 remain stationary, as shown in FIG. Fig.13 As shown in the enlarged view in the upper right corner, the two large core-pulling sliders 41 of the two-color station 12 drive the two-color station single-sided shovel base 431b and the two-color station double-sided shovel base 432b to move forward and backward, and the two small core-pulling sliders 42 move left and right to complete the core pulling; Based on the above considerations, in step 7, if Fig.18 As shown, the two large core-pulling sliders 41 of the one-color station 11 drive the single-sided shovel base 431a of the one-color station and the double-sided shovel base 432a of the one-color station to move forward and backward, and the two small core-pulling sliders 42 are reset under the action of the first inclined surface 4211 and the second inclined surface; the two large core-pulling sliders 41 of the two-color station 12 drive the single-sided shovel base 431b of the two-color station and the double-sided shovel base 432b of the two-color station to move forward and backward, and the two small core-pulling sliders 42 are locked under the action of the first inclined surface 4211 and the third inclined surface.

[0039] Please continue reading Figure 1-19 , wherein the four-way core-pulling mechanism 4 further includes a cylinder 45 and a transmission rod 46 disposed on the cylinder 45; In step 3 and step 7, the oil cylinder 45 drives the core-pulling large slider 41 to move via the transmission rod 46 .

[0040] The above description is only for the best embodiment of the present invention, but it should not be understood as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the scope of protection of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A two-color automotive interior trim manufacturing process based on a multi-directional core pulling mechanism, characterized in that: The mold body comprises a mold body, wherein the mold body has a single-color station and a two-color station; the single-color station and the two-color station are respectively provided with a lower mold core, and the lower mold core has at least one cavity; It also includes a core rotating mechanism arranged between the two lower mold cores, two sets of four-way core pulling mechanisms respectively arranged at the one-color station and the two-color station, and an ejection mechanism arranged at the two-color station; the four-way core pulling mechanism includes two large core pulling sliders arranged at the front and rear ends of the cavity and two small core pulling sliders on the left and right sides, and a shovel base assembly arranged on the large core pulling slider; The manufacturing process includes the following steps: Step 1, initial state: in the mold closing state, a primary injection molding is completed in the mold cavity of the one-color station to form a semi-finished product, and a secondary injection molding is completed in the mold cavity of the two-color station to form a finished product; Step 2: Open the mold; Step 3, four-way core pulling: the two large core pulling sliders of the one-color station move away from the cavity respectively, and the two small core pulling sliders are stationary, so that the semi-finished product can achieve front and rear core pulling; at the same time, the two large core pulling sliders of the two-color station move away from the cavity respectively, and the two large core pulling sliders drive the two small core pulling sliders to move away from the cavity through the shovel base assembly, so that the finished product can achieve four-way core pulling; Step 4, ejection: the ejection mechanism below the two-color station ejects the finished product; Step 5, switching positions: the core rotating mechanism lifts up and rotates the two lower mold cores so that the two lower mold cores exchange positions; Step 6: mold closing; Step 7, four-way core pulling reset: the two large core pulling sliders of the one-color station move toward the direction close to the cavity respectively, and the two small core pulling sliders are driven by the shovel base assembly to move toward the direction close to the cavity, so as to realize the four-way core pulling reset of the one-color station; at the same time, the two large core pulling sliders of the two-color station move toward the direction close to the cavity respectively, and the two small core pulling sliders are stationary, so as to realize the front and rear core pulling reset of the two-color station; Step 8, injection molding: the injection molding machine simultaneously performs primary injection molding on the cavity of the one-color station and secondary injection molding on the cavity of the two-color station; Step 9: Repeat steps 1-8.

2. The manufacturing process of two-color automobile interior decoration parts based on a multi-directional core-pulling mechanism according to claim 1 is characterized in that: It also includes upper mold cores which are respectively arranged at the one-color station and the two-color station and respectively cooperate with the two lower mold cores; The mold body comprises a lower mold assembly and an upper mold assembly; the lower mold core is arranged on the lower mold assembly, and the upper mold core is arranged on the upper mold assembly; In step 2, the upper mold assembly drives the upper mold core to move upward; In step 6, the upper mold assembly drives the upper mold core to move downward.

3. The manufacturing process of two-color automobile interior decoration parts based on a multi-directional core-pulling mechanism according to claim 1 is characterized in that: The core rotating mechanism includes a core rotating plate fixing seat, a core rotating guide sleeve and a core rotating body arranged in sequence from top to bottom; the two lower mold cores are respectively arranged on both sides of the core rotating plate fixing seat; step 5 includes the following sub-steps: Step 51: The rotating core body drives the two lower mold cores to rise via the rotating core plate fixing seat; Step 52: The rotating core body drives the two lower mold cores to rotate 180 degrees via the rotating core plate fixing seat; Step 53: The rotating core body drives the two lower mold cores to fall through the rotating core plate fixing seat, so that the lower mold core of the one-color station and the lower mold core of the two-color station switch positions.

4. The manufacturing process of two-color automobile interior decoration parts based on a multi-directional core-pulling mechanism according to claim 1 is characterized in that: The ejection mechanism includes a large ejector plate and a plurality of ejector columns and a plurality of limit columns arranged on the large ejector plate; the lower mold core further includes a small ejector plate; the small ejector plate includes a small ejector plate body and a small ejector arranged in the small ejector plate body; In step 4, the large ejector plate drives the small ejector to move upward via the ejector column so as to eject the finished product in the two-color station.

5. The manufacturing process of two-color automobile interior decoration parts based on a multi-directional core-pulling mechanism according to claim 4 is characterized in that: The small ejector plate further includes a locking block disposed on one side of the small ejector plate body; The four-way core-pulling mechanism further comprises a plurality of small ejector plate locking blocks following the core-pulling large slider; the side of the small ejector plate locking block has a locking groove; the locking groove cooperates with the locking block; In step 3, the core-pulling large slide blocks of the one-color station and the two-color station drive the small ejector plate locking block to move away from the cavity so that the locking block withdraws from the locking groove; In step 7, the core-pulling large slide blocks of the one-color station and the two-color station drive the small ejector plate locking block to move toward the direction close to the cavity so that the locking block enters the locking groove.

6. The manufacturing process of two-color automobile interior decoration parts based on a multi-directional core-pulling mechanism according to claim 1 is characterized in that: The lower die core has two cavities arranged on the left and right; the lower die core includes two lower die core inserts, which are respectively arranged in the cavities; the large core-pulling slider includes two slider heads arranged on the left and right, and the two slider heads correspond to the two cavities respectively; each cavity is provided with two small core-pulling sliders.

7. The manufacturing process of two-color automobile interior decoration parts based on a multi-directional core-pulling mechanism according to claim 6 is characterized in that: The lower mold core also includes a plurality of small slider guide rails; one of the small slider guide rails is provided on both sides of each cavity; In step 3 and step 7, the core-pulling small slider slides left and right in the small slider guide rail.

8. The manufacturing process of two-color automobile interior decoration parts based on a multi-directional core-pulling mechanism according to claim 7 is characterized in that: The small slider guide rail comprises a first guide rail and a second guide rail; the first guide rail is arranged on both sides of the lower mold core, and the second guide rail is arranged between the two cavities; one of the core-pulling small sliders is arranged in the first guide rail, and two of the core-pulling small sliders are arranged in the second guide rail; The core-pulling small slider has an inclined groove, and the inclined groove includes a first inclined surface and a bottom surface; the core-pulling small slider includes an elastic shifting block arranged on the bottom surface; In step 3 and step 7, the shovel base assembly moves back and forth in the inclined groove along with the large core-pulling slider. When pulling the core, the elastic shift block drives the small core-pulling slider to pull the core. When resetting, the small core-pulling slider is driven to reset through the first inclined surface.

9. The manufacturing process of two-color automobile interior decoration parts based on a multi-directional core-pulling mechanism according to claim 8 is characterized in that: The shovel base assembly includes a single-sided shovel base and a double-sided shovel base; the single-sided shovel base cooperates with the first guide rail, and the double-sided shovel base cooperates with the second guide rail; the single-sided shovel base includes a single-sided shovel base at a single-color station and a single-sided shovel base at a two-color station, and the double-sided shovel base includes a double-sided shovel base at a single-color station and a double-sided shovel base at a two-color station; The one-color station single-sided shovel base has one avoidance groove and one second inclined surface, and the one-color station double-sided shovel base has two avoidance grooves and two second inclined surfaces; The two-color station single-sided shovel base has a control groove and a third inclined surface, and the two-color station double-sided shovel base has two control grooves and two third inclined surfaces; In step 3, the two large core-pulling sliders of the one-color station drive the single-sided shovel base and the double-sided shovel base of the one-color station to move forward and backward, and the two small core-pulling sliders remain stationary. The two large core-pulling sliders of the two-color station drive the single-sided shovel base and the double-sided shovel base of the two-color station to move forward and backward, and the two small core-pulling sliders move left and right to complete the core pulling; In step 7, the two large core-pulling sliders of the one-color station drive the single-sided shovel base and the double-sided shovel base of the one-color station to move forward and backward, and the two small core-pulling sliders are reset under the action of the first inclined surface and the second inclined surface; the two large core-pulling sliders of the two-color station drive the single-sided shovel base and the double-sided shovel base of the two-color station to move forward and backward, and the two small core-pulling sliders are reset under the action of the first inclined surface and the third inclined surface.

10. The manufacturing process of two-color automobile interior decoration parts based on a multi-directional core-pulling mechanism according to any one of claims 1 to 9, characterized in that: The four-way core pulling mechanism further comprises an oil cylinder and a transmission rod arranged on the oil cylinder; In step 3 and step 7, the oil cylinder drives the core-pulling large slider to move via the transmission rod.

Images