Machining die and forming method for automobile cold and warm cup holder part

Abstract

The invention discloses a machining mold and a forming method of an automobile cold and warm cup stand part, the machining mold comprises a bottom plate, a bottom mold, a first front mold and a second front mold, the bottom mold comprises a rear mold base, a rear mold core, a rear mold plate, an ejector plate and a rear mold base plate, and the ejector plate is movably arranged relative to the rear mold core in the mold closing and splitting direction; the second front mold and the second mold core are provided with movable connecting rods for mold closing and opening linkage; the clearance assembly drives a connecting arm to move relative to the second mold core through an electric cylinder unit to limit the second-section displacement of the second mold core in mold closing; according to the mold, two-section displacement is generated in the injection molding process, the color mixing influence on double-color injection molding is reduced, a manual cutting board is arranged to conveniently control opening and closing of a runner, participation of a power unit is reduced through an arranged core-pulling linkage structure, installation of a control and feedback switch is reduced, the overall complexity of the mold is simplified, and the production efficiency is improved. The mold is convenient to use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile parts mold, and particularly relates to a processing mold and a forming method for an automobile cold and warm cup holder part. BACKGROUND

[0002] A double-color mold is a mold that can complete the injection molding of two different materials or colors at one time during the injection molding process. Its working principle is to inject plastics of different colors or different materials into the mold cavity through the alternating mold closing process of two molds, to complete complex double-color injection molding. Double-color molds are usually used to produce plastic products that require different colors or different materials to be combined.

[0003] A double-color mold usually includes a first front mold, a second front mold, a rear mold, and a base plate. The rear mold is fixed on the base plate, and the base plate is used to drive the rear mold to rotate, so that the rear mold is sequentially combined with the first front mold and the second front mold. When the rear mold is combined with the first front mold, a first cavity is formed to perform the first injection molding, and an intermediate part is obtained. Then, the rear mold is separated from the first front mold, and the intermediate part on the rear mold is not discharged at this time. Then, the base plate drives the rear mold to rotate by 180 degrees, and then the rear mold is combined with the second front mold to form a second cavity to perform the second injection molding on the basis of the intermediate part, and finally a finished part composed of two materials is obtained.

[0004] However, based on the problems caused by its own production and processing, especially the double-color mold must be produced by a double-color injection molding machine (double-barrel, double-nozzle), which includes but is not limited to twice injection molding requirements for materials, injection molding, adaptability to injection molding machines, and shrinkage caused by double-color double-injection environmental temperature. These factors will affect the product composed of two materials or two colors by the existing double-color mold. SUMMARY

[0005] In view of the prior art, the purpose of the present application is to provide a mold for producing and processing automobile cold and warm cup holder parts and a processing and forming method using the mold.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: a processing mold for an automobile cold and warm cup holder part, comprising a bottom mold, a first front mold, and a second front mold, wherein the bottom mold is fixedly provided with a base plate at the bottom, and the bottom mold comprises a rear mold seat, a rear mold core, a rear mold plate, a ejector plate, and a rear mold base plate. The ejector plate is movably arranged along the closing and opening direction of the mold relative to the rear mold core, and a tactile switch is fixed on the ejector plate. The first front mold and the second front mold are respectively provided with a front mold seat and a first mold core and a second mold core matched with the rear mold core.

[0007] The second front mold and the second mold core are provided with a movable connecting rod combined with the mold closing and opening linkage, and the second front mold is further provided with a clearance component and a delay trigger switch, the clearance component comprises an electric cylinder unit and an inclined driving component electrically connected with the delay trigger switch, the inclined driving component comprises a connecting arm matched with a slope part provided on the second mold core, and a sector block meshed with a rack provided on the connecting arm, the sector block is fixed with an output shaft of the electric cylinder unit, and the connecting arm is driven by the electric cylinder unit to limit the two-stage displacement of the second mold core relative to the second mold core during mold closing.

[0008] Further, the second mold core has two-stage displacement along the mold closing and opening direction in the mold closing state, and the displacement interval is between 0.2mm and 0.5mm, and the displacement is controlled based on the stretching and contraction of the connecting arm driven by the sector block.

[0009] Further, the second front mold is further provided with an external opening and closing knife plate, the external opening and closing knife plate is provided relative to the second front mold to close the runner in the stretching and contraction mode, the second front mold is further provided with a mounting plate, the mounting plate is provided with a manual limit pin with a limiting spring, and the external opening and closing knife plate is provided with a groove matched with the manual limit pin.

[0010] Further, the front mold seat and the rear mold seat are further provided with a core pulling module, the core pulling module comprises a positioning base block with an inclined groove surface and a positioning hook block, the positioning hook block and the positioning base block are respectively provided on the rear mold seat and the front mold seat, the positioning base block is further provided with an elastic pin rod with a spring component relative to the inclined groove surface, the elastic pin rod is provided with an inclined driving surface on one side of the positioning hook block and a flat part on the other side, the positioning hook block is provided with a matching surface matched with the inclined driving surface and the flat part on the other side, and the positioning base block is provided relative to the rear mold seat in a sliding core pulling mode.

[0011] Further, the positioning base block is further provided with a limiting groove, the rear mold seat is provided with a limiting pin with a top spring relative to the limiting groove in the stretching and contraction mode, the limiting pin is further provided with an inclined surface on both sides of the front end, and the positioning base block is provided with an inlay block relative to the rear mold core.

[0012] The application also provides a forming method of a processing mold of an automobile cold and warm cup holder part, which comprises the following forming steps:

[0013] S1: after the preheating and debugging of the injection molding machine and the mold are completed, the first front mold and the second front mold are first closed with the bottom mold, at this time, the external opening and closing knife plate closes the runner of the second front mold, the injection molding machine is pressed, and the molten material is injected into the first cavity formed by the first front mold core and the rear mold core, thereby forming a semi-finished product;

[0014] S2: after the semi-finished product is formed, the mold is opened, the external opening and closing knife plate is removed, the bottom plate of the bottom mold is rotated, the semi-finished product is rotated by 180° to the second front mold, and the mold is closed again;

[0015] S3: After the second mold clamping, the injection molding machine gives pressure again, and the molten material is injected from the first injection head to form a semi-finished product in the first cavity again. At this time, the external opening and closing knife plate is removed, and the second cavity composed of the second front mold and the rear mold core with the semi-finished product is injected with the second color material by the second injection head;

[0016] S4: At the same time of S3 mold injection, the delay trigger switch feedback type set on the second front mold drives the electric cylinder unit to drive the sector block to rotate, and the connecting arm drives the second mold core to move outward in the time before the pressure maintaining stage after the first stage is completed. The second cavity is further expanded by the second displacement, and the molten material continues to be injected to fill the entire second cavity;

[0017] S5: After the second injection is completed, the injection molding machine triggers the pressure maintaining process, and the product is cooled and solidified in the cavity after the pressure maintaining is completed;

[0018] S6: Subsequently, the first front mold and the second front mold are separated, and after the separation is completed, the ejector plate 14 moves towards the mold clamping direction, and the injection product is ejected from the cavity by the ejector rod for demolding. The injection is completed, and the molded product is obtained.

[0019] Further, the first front mold corresponds to PC+ABS black material, the mold preheating temperature is 80-100℃, the material forming temperature is about 280-300℃, the second front mold injection material is gray transparent PC, the forming temperature is about 220-240℃, the second mold core starts the second displacement after 3S of injection in the second cavity, the displacement size is 0.2mm, and the injection machine performs pressure maintaining for 15S after the second displacement is completed.

[0020] Further, during the mold clamping process of the first front mold and the second front mold relative to the bottom mold, the positioning hook block arranged on the first front mold and the second front mold approaches the inclined groove of the positioning base block. During this process, the outward tapered matching surface of the positioning hook block cooperates with the inclined driving surface of the elastic pin rod to drive the elastic pin rod to retract into the positioning base block until the positioning hook block passes through the elastic pin rod.

[0021] Further, after the positioning hook block passes through the elastic pin rod, the flat part of the elastic pin rod matches the matching surface of the flat structure arranged opposite to the positioning hook block, so that during the mold separation, the positioning hook block and the positioning base block move away from each other vertically, so that the positioning base block moves outward along the taper of the flat part relative to the rear mold seat, thereby driving the fixed insert relative to the cavity to complete the core pulling.

[0022] Beneficial effects: the present application provides a processing mold design and forming scheme of automobile cold and warm cup holder parts, the design different from the prior art in the present application includes optimization of two-stage injection molding, by setting the mold core to produce two-stage displacement in the injection molding process, forming the secondary expansion of the mold cavity to fill the two-stage material, thereby reducing the influence of the first color on the two-color injection molding, allowing the second color surface to be more pure, reducing the color mixing effect with the first color, in addition, the manually operated knife plate is provided to facilitate the opening and closing of the flow channel, the core pulling structure is set to reduce the participation of the additional power unit, reduce the installation of the control and feedback switch, simplify the overall complexity of the mold, and facilitate the use of the mold. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the overall structure diagram of the processing mold of the present application.

[0024] Figure 2 It is the back mold diagram of the processing mold of the present application.

[0025] Figure 3 It is the external opening and closing knife plate diagram of the mold of the present application.

[0026] Figure 4 It is the internal component structure diagram of the mold of the present application.

[0027] Figure 5 It is the core pulling module diagram of the mold of the present application.

[0028] Figure 6 It is the avoidance assembly diagram of the mold of the present application.

[0029] Figure 7 It is the automobile cold and warm cup holder structure diagram of the present application.

[0030] Reference signs: 1, bottom mold; 11, back mold base; 12, back mold core; 13, back mold plate; 14, thimble plate; 15, back mold base; 16, light touch switch; 17, front mold base; 2, first front mold; 21, first mold core; 3, second mold base; 31, second mold core; 32, external opening and closing knife plate; 33, mounting plate; 34, limiting spring; 35, manual limit pin; 36, groove; 38, movable connecting rod; 4, bottom plate; 6, core pulling module; 61, inclined slot surface; 62, positioning base block; 63, positioning hook block; 64, elastic pin rod; 641, spring assembly; 65, inclined driving surface; 66, flat surface; 67, matching surface; 68, limiting groove; 69, limiting pin; 691, top spring; 692, inclined surface; 7, avoidance assembly; 72, electric cylinder unit; 73, inclined driving assembly; 74, inclined slope surface; 75, connecting arm; 76, rack; 77, sector block; 78, output shaft. DETAILED DESCRIPTION

[0031] In order to enable the above-mentioned purposes, features and advantages of the present application to be more clearly understood, the present application will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0032] As Figures 1-7 shown in a kind of processing mould of automobile cold and warm cup holder parts, including bottom die 1, first front mould 2, second front mould 3, the mould of the application its bottom die 1 bottom fixedly arranged bottom plate 4, bottom die 1 itself includes being provided with rear mould seat 11, the rear mould core 12 of being arranged in rear mould seat 11 and being linked with it, rear mould core 12 is processed with the cavity on it and the cooperation of front mould, the rear mould seat 11 of this embodiment is fixed with rear mould plate 13, rear mould plate 13 is fixed on rear mould base 15, there is movable cavity of jack in between rear mould base 15 and rear mould plate 13, top pin plate 14 is arranged in movable cavity, top pin plate 14 is moved along the direction of combining and separating mould relative to rear mould core 12, is used to eject the product of injection molding solidification in cavity, reference Figure 1 And Figure 2 As shown in the present application, the top pin plate 14 is also fixed with a tactile switch 16, which is used to trigger the drive unit control of the top pin plate 14.

[0033] Further, the first front mould 2 and the second front mould 3 of the present application are respectively provided with a front mould seat 17 and a first mould core 21 and a second mould core 31 matched with the rear mould core 12, and it is worth noting that, unlike the fixed setting of the rear mould core 12 and the rear mould seat 11, the second front mould 3 of the present application is provided with an active connecting rod 38 combined with the second mould core 31 and the front mould seat 17 of the second front mould 3, and a certain gap is left between the second mould core 31 and the front mould seat 17 of the second front mould 3 in the combined state of the second front mould 3, and the two are kept in contact in state two, and the specific implementation structure is as follows: the second front mould 3 is also provided with an emptying assembly 7 and a delay trigger switch, the emptying assembly 7 includes an electric cylinder unit 72 and an inclined drive assembly 73 electrically connected with the delay trigger switch, the delay trigger switch is triggered at the moment of combining the second front mould 3 with the bottom die 1, and after a delay, the model is fed back to the electric cylinder unit 72 control assembly of the nasal aperture assembly 7, so that after a certain time in the state of combining the second front mould 3 with the bottom die 1, the mould enters state two to realize complete injection molding of the mould.

[0034] The inclined driving assembly 73 of the invented avoiding assembly 7 as mentioned above comprises a connecting arm 75 matched with the inclined part 74 arranged on the second mold core 31, a sector block 77 arranged in mesh with the rack 76 arranged on the connecting arm 75, the sector block 77 is fixed with the output shaft 78 of the electric cylinder unit 72, the electric cylinder unit 72 drives the connecting arm 75 to move relative to the second mold core 31 to limit the second mold core 31 to move in two sections in the mold closing, after the second mold core 31 is kept in the closed state for a certain time, the electric cylinder unit 72 is started to rotate the sector block 77 after the delay trigger switch is triggered, after the sector block 77 is rotated, the connecting arm 75 with the rack 76 in mesh moves to release the gap behind the second mold core 31, the second mold core 31 moves backward to complete the two-section displacement, which is to make the second color molding more complete by two-section slow injection, especially for the cup holder with deep groove design of the invention, the two-section injection design of the embodiment can make the injection material better fill the mold cavity, and the two-section displacement expansion cavity of the embodiment is located away from the first color semi-finished product side, the secondary injection has little effect on the first color, and reduces the surface color mixing of the molded product.

[0035] As a further arrangement of the above-mentioned scheme, the second mold core 31 moves in two sections along the mold closing direction in the mold closing state, the displacement interval is between 0.2mm-0.5mm, which is controlled based on the stretching and contraction of the connecting arm 75 driven by the sector block 77.

[0036] Further, the second mold core 31 of the invention is also provided with an external opening and closing knife plate 32, which is arranged relative to the second mold core 3 to close the runner in extension and retraction, the second mold core 3 is also provided with a mounting plate 33, the mounting plate 33 is provided with a manual limit pin 35 with a limiting spring 34, the external opening and closing knife plate 32 is provided with a groove 36 matched with the manual limit pin 35, the external opening and closing knife plate 32 of the embodiment of the invention is mainly used for workers to manually control the runner to be closed, so as to realize the rapid control of injection molding, by using the simple external opening and closing knife plate 32, the injection molding machine control is simplified, and the adaptability is stronger on some old independent control debugging troublesome double injection molding machines.

[0037] As a further arrangement of the above-mentioned scheme, the front mold seat 17 and the rear mold seat 11 are further provided with a core-pulling module 6, the core-pulling module 6 comprises a positioning base block 62 with an inclined groove surface 61 and a positioning hook block 63, the positioning hook block 63 and the positioning base block 62 are respectively arranged on the rear mold seat 11 and the front mold seat 17, the positioning base block 62 is further provided with an elastic pin rod 64 with a spring assembly 641 relative to the inclined groove surface 61, the elastic pin rod 64 is provided with an inclined driving surface 65 on one side and a flat surface 66 on the other side relative to the positioning hook block 63, the positioning hook block 63 is provided with a matching surface 67 relative to the inclined driving surface 65 and the flat surface 66, the positioning base block 62 is arranged to slide and pull the core relative to the rear mold seat 11, the positioning base block 62 is further provided with a limiting groove 68, the rear mold seat 11 is provided with a limiting pin 69 with a top spring 691 relative to the limiting groove 68, the limiting pin 69 is further provided with an inclined surface 692 on both sides of the front end, and the positioning base block 62 is provided with an insert block 18 relative to the rear mold core 12.

[0038] The mold of the present application is based on the structural design requirements of the product, in order to facilitate production and demolding, some structures of the side of the product are further provided with a core-pulling module 6 to cooperate to form a mold cavity, when the mold is closed, as shown in Figure 4 and Figure 5 The positioning base block 62 with the inclined groove surface 61 connected through the insert block 18 arranged on the bottom mold 1 of the core-pulling module 6 is driven by the inclined surface of the positioning hook block 63 under pressure to move inwardly and embed in the inner wall of the mold cavity structure to form a complete injection mold cavity, it is worth noting that when the positioning hook block 63 is pressed, the inclined slope surface structure of the positioning hook block 63 is matched with the inclined driving surface 65 on the elastic pin rod 64 which protrudes inwardly from both sides of the positioning base block 62, the elastic pin rod 64 is compressed under the abutting force, and when the positioning hook block 63 passes through the elastic pin rod 64, the front end abuts against the inclined groove surface 61 of the positioning base block 62 to drive the positioning base block 62 to slide inwardly, at this time, the elastic pin rod 64 is reset and pops out from the rear end of the T-shaped structure of the front end of the positioning hook block 63 based on the spring assembly 641, and the flat surface 66 of the elastic pin rod 64 is matched with the flat surface of the positioning hook block 63, when the mold is opened, the positioning hook block 63 will not drive the elastic pin rod 64 to contract based on the flat surface matching arrangement, but the upwardly moving positioning hook block 63 is inclined relative to the elastic pin rod 64, so that the upwardly moving positioning hook block 63 pulls the positioning base block 62 to move outwardly to complete the core-pulling action, further, when the positioning base block 62 moves outwardly to the end of the stroke, the elastic pin rod 64 is out of contact with the positioning hook block 63, at this time, the first front mold 2 and the second front mold 3 continue to rise, and the core-pulling module 6 no longer acts, the core-pulling design is realized by the mold closing and opening of the mold itself, which simplifies the mold structure, and the core-pulling has high reliability and strong stability.

[0039] Further, the limiting pin 69 with a top spring 691 structure is arranged on the rear die seat 11, two limiting grooves 68 are arranged on the positioning base block 62, the distance between the limiting grooves 68 is the same as the active stroke distance of the positioning base block 62, at the two active ends of the positioning base block 62, the limiting pin 69 is clamped into the limiting groove 68, so that the positioning base block 62 has a certain holding force and cannot be activated and separated from the designed stop position due to the vibration of the mold external force, it is worth noting that when the limiting pin 69 is clamped into the limiting groove 68, it is stretched outwards by the elastic force of the top spring 691, and in the process of stretching out to the limit, the positioning base block 62 is pushed inwards by a certain distance based on the slope cooperation in the slope cooperation with the limiting groove 68 until the V-shaped complete fitting process, this distance makes the elastic pin rod 64 on the positioning base block 62 just below the positioning hook block 63 when the positioning hook block 63 moves down, and the bottom of the positioning hook block 63 is provided with a slope driving design, which further pushes the positioning base block 62 inwards to further complete the above-mentioned action of the elastic pin rod 64 after stretching out, the positioning hook block 63 abuts against the slope groove 61, etc. The core is sent to the mold.

[0040] The application also provides a forming method of a processing mold of an automobile cold and warm cup holder part, comprising the following forming steps:

[0041] S1: after the preheating debugging of the injection molding machine and the mold is completed, the first front mold 2 and the second front mold 3 are first combined with the bottom mold 1, at this time, the external opening and closing knife plate 32 closes the flow channel of the second front mold 3, after the injection molding machine is pressed, the molten material is injected into the first cavity formed by the first front mold core 21 and the rear mold core 12, and a semi-finished product is formed, the purpose of arranging the external opening and closing knife plate 32 is mainly to quickly control the mold flow channel manually, to determine whether the current sub-mold is subjected to injection molding by switching the closed flow channel, compared with strictly controlling by an electronic program, the mold of the embodiment can be quickly controlled without program setting, and the application of double-color or even multi-color injection molding can be conveniently carried out on some injection molding machines without related program functions;

[0042] S2: after the semi-finished product is formed, the mold is separated, and then the external opening and closing knife plate 32 is released, the bottom plate 4 of the bottom mold 1 is rotated, the semi-finished product is rotated by 180° to the second front mold 3, and the second time is combined;

[0043] S3: after the second time is combined, the injection molding machine is pressed again, the molten material is injected from the first injection head, the first cavity forms the semi-finished product again, and at this time, the external opening and closing knife plate 32 is released, and the second cavity formed by the second front mold 3 and the rear mold core 12 and containing the semi-finished product is injected with the material of the second color by the second injection head;

[0044] S4: while the injection molding of S3 is being performed, the delayed trigger switch feedback type provided on the second front mold 3 is set, the electric cylinder unit 72 drives the sector block 77 to rotate, the connecting arm 75 is driven to release the limiting of the second mold core 31, the second mold core 31 is moved outward in the time before the pressure maintaining stage after the first stage is completed, the second cavity is further expanded by the second displacement, and the molten material is continuously injected to fill the entire second cavity. In this way, the outer layer of the second color material is mainly in contact with the inner layer of the second color material close to the first color material during the injection molding process, and the influence of the outer layer color mixing is reduced.

[0045] S5: after the second-stage injection molding is completed, the injection molding machine triggers the pressure maintaining process, and the product is cooled and solidified in the cavity after the pressure maintaining is completed.

[0046] S6: subsequently, the first front mold 2 and the second front mold 3 are separated, after the mold separation is completed, the ejector plate 14 is moved towards the mold closing direction, the injection molded product is ejected from the cavity by the ejector rod for demolding, and the injection molding is completed to obtain the molded product.

[0047] Preferably, the first front mold 2 corresponds to the black material of PC+ABS injection raw material, the mold adopts electric heating preheating mode, the preheating temperature is 80-100℃, the material molding temperature is about 280-300℃, the second front mold 3 injection material is gray transparent PC, the molding temperature is about 220-240℃, the second mold core 31 starts the second displacement after injection molding for 3S in the second cavity, the displacement size is 0.2mm, and the injection molding machine performs pressure maintaining for 15S after the second displacement is completed.

[0048] Preferably, during the mold closing process of the first front mold 2 and the second front mold 3 relative to the bottom mold 1, the positioning hook block 63 provided on the first front mold 2 and the second front mold 3 is close to the inclined groove 61 of the positioning base block 62, the tapered matching surface 67 of the positioning hook block 63 outwardly during this process cooperates with the inclined driving surface 65 of the elastic pin rod 64, drives the elastic pin rod 64 to retract into the positioning base block 62 until the positioning hook block 63 passes through the elastic pin rod 64.

[0049] Preferably, after the positioning hook block 63 passes through the elastic pin rod 64, the planar part 66 of the elastic pin rod 64 matches the planar structure matching surface 67 of the positioning hook block 63, so that during mold separation, the positioning hook block 63 and the positioning base block 62 relatively vertically move away, so that the positioning base block 62 moves outward along the taper of the planar part 66 relative to the mold base 11, thereby driving the fixed insert block 18 to move away from the cavity to complete the core pulling.

[0050] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the present application and its equivalent technology, the present application also intends to include these modifications and variations.

Claims

1. A processing die for an automobile cup holder part, characterized by: The utility model relates to a mould structure of injection moulding, including bottom die (1), first front mould (2), second front mould (3), bottom die (1) bottom fixed setting bottom plate (4), bottom die (1) includes rear mould seat (11), rear mould core (12), rear mould plate (13), ejector rod plate (14) and rear mould base plate (15), ejector rod plate (14) is relatively rear mould core (12) along with the direction of action setting of combining and separating mould, and the light touch switch (16) is still fixed on ejector rod plate (14), and first front mould (2) and second front mould (3) are equipped with front mould seat (17) and first mould core (21) and second mould core (31) matched with rear mould core (12) respectively, Second front mould (3) and second mould core (31) set up movable connecting rod (38) and combine and separate mould linkage, and second front mould (3) is equipped with emptying assembly (7) and delay trigger switch in still, the emptying assembly (7) includes electric cylinder unit (72) and inclined drive assembly (73) of setting electric connection with delay trigger switch, the inclined drive assembly (73) includes connecting arm (75) matched with the inclined plane portion (74) of setting on second mould core (31), and the sector gear (77) of setting rack (76) is engaged with connecting arm (75), the sector gear (77) is fixed with the output shaft (78) of electric cylinder unit (72), and the second mould core (31) is restricted in the two section displacement of combining mould through the drive connecting arm (75) relative second mould core (31) by electric cylinder unit (72).

2. The machining die of a cup holder part for a car air conditioner according to claim 1, characterized in that: The two section displacement of second mould core (31) along with the direction of combining and separating mould in the state of combining mould, and the displacement interval is between 0.2mm-0.5mm, and the stretch of connecting arm (75) is driven under the sector gear (77) and is controlled.

3. The machining die of a cup holder part for a car air conditioner according to claim 1, characterized in that: Second front mould (3) is equipped with external open-close knife plate (32) still, and the external open-close knife plate (32) is relatively second front mould (3) and is set up, and the second front mould (3) is equipped with mounting plate (33) in still, and the mounting plate (33) is equipped with manual limit pin (35) with limiting spring (34), and the external open-close knife plate (32) is equipped with recess (36) matched with manual limit pin (35).

4. The machining die of a cup holder part for a vehicle air conditioner according to claim 1, characterized in that: Front mould seat (17) and rear mould seat (11) are equipped with core-pulling module (6) in still, the core-pulling module (6) includes positioning base block (62) with inclined slot face (61) and positioning hook block (63), and the positioning hook block (63) and positioning base block (62) are set up on rear mould seat (11) and front mould seat (17) respectively, and the elastic pin rod (64) with spring assembly (641) is set up on the one side of positioning base block (62) relative inclined slot face (61) still, and the inclined drive face (65) is set up on the other side of elastic pin rod (64) relative positioning hook block (63), and the plane portion (66) is set up, the matching surface (67) matched with inclined drive face (65) and plane portion (66) is set up on the positioning hook block (63), and positioning base block (62) is relatively rear mould seat (11) and is set up sliding core-pulling.

5. The machining die of claim 4, wherein: The positioning base block (62) is further provided with a limiting groove (68), the rear mold base (11) is provided with a limiting pin (69) with a top spring (691) extending and retracting relative to the limiting groove (68), and the limiting pin (69) is further provided with a slope (692) on both sides of the front end, and the positioning base block (62) is provided with an insert block (18) relative to the rear mold core (12).

6. The forming method of a processing mold of an automobile cup holder part according to claim 1, characterized in that, The forming steps include: S1: after the preheating and debugging of the injection molding machine and the mold are completed, the first front mold (2) and the second front mold (3) are first clamped with the bottom mold (1), at this time, the external opening and closing knife plate (32) closes the runner of the second front mold (3), after the injection molding machine is pressed, the molten material is injected into the first cavity formed by the first front mold core (21) and the rear mold core (12), and a semi-finished product is formed; S2: after the semi-finished product is formed, the mold is opened, and then the external opening and closing knife plate (32) is removed, and the bottom plate (4) of the bottom mold (1) is rotated, and the semi-finished product is rotated by 180° to the second front mold (3), and the mold is clamped again; S3: after the mold is clamped again, the injection molding machine is pressed again, the molten material is injected from the first injection head, the first cavity forms the semi-finished product again, and at this time, the external opening and closing knife plate (32) is removed, and the second cavity formed by the second front mold (3) and the rear mold core (12) and containing the semi-finished product is injected with the material of the second color by the second injection head; S4: while clamping and injecting in S3, the delay trigger switch provided on the second front mold (3) feeds back the model, the electric cylinder unit (72) drives the sector block (77) to rotate, drives the connecting arm (75) to remove the limiting of the second mold core (31), and the second mold core (31) moves outward in the time before the pressure maintaining stage after the first stage is completed, the second displacement makes the second cavity further expand, and the molten material continues to be injected to fill the entire second cavity; S5: after the injection molding machine completes the second-stage injection, the pressure maintaining process is triggered, and after the pressure maintaining is completed, the product is cooled and solidified in the cavity to form a product; S6: subsequently, the first front mold (2) and the second front mold (3) are opened, after the mold opening is completed, the ejector plate (14) moves towards the clamping direction, the injection product is ejected from the cavity by the ejector rod, and the injection is completed to obtain a molded product.

7. The method of claim 1, wherein the cup holder part is a cup holder part for a vehicle air conditioner. The first front mold (2) corresponds to PC+ABS black material, the mold preheating temperature is 80-100℃, the material forming temperature is about 280-300℃, the second front mold (3) injection material is gray transparent PC, the forming temperature is about 220-240℃, the second mold core (31) starts the second displacement after injecting for 3S in the second cavity, the displacement size is 0.2mm, and the injection machine maintains pressure for 15S after the second displacement is completed.

8. The method of claim 1, wherein the cup holder part is a cup holder part for a vehicle air conditioner. During the clamping process of the first front mold (2) and the second front mold (3) relative to the bottom mold (1), the positioning hook block (63) arranged on the first front mold (2) and the second front mold (3) is close to the inclined groove (61) of the positioning base block (62), and in this process, the outward tapered matching surface (67) of the positioning hook block (63) is matched with the inclined driving surface (65) of the elastic pin rod (64), the elastic pin rod (64) is driven to retract into the positioning base block (62) until the positioning hook block (63) passes through the elastic pin rod (64).

9. The method of claim 8, wherein the cup holder part is a cup holder part for a vehicle air conditioner. After the positioning hook block (63) passes through the elastic pin rod (64), the flat part (66) of the elastic pin rod (64) is matched with the flat structure matching surface (67) arranged opposite to the positioning hook block (63), so that during the mold opening, the positioning hook block (63) is vertically away from the positioning base block (62), and the positioning base block (62) is moved outward along the taper of the flat part (66) relative to the rear mold seat (11), so that the fixed insert block (18) is driven to move away from the cavity, and the core pulling is completed.

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