Sliding block grading core-pulling demolding device, demolding method and double-color injection mold

Abstract

The invention discloses a sliding block grading core-pulling demolding device, a demolding method and a double-color injection mold.The sliding block grading core-pulling demolding device comprises a main sliding block base, a main sliding block, a delay sub-sliding block, a delay push strip, a locking block, a delay guide block and a drag hook mechanism, and the main sliding block base is connected with a movable mold through the drag hook mechanism; one end of the delay push strip penetrates through the main sliding block and is connected with the delay sub-sliding block, and the other end of the delay push strip is provided with a driving end; the delay guide block is sequentially provided with a main sliding block core-pulling section, a delay sub-sliding block core-pulling section and a delay sub-sliding block maintaining section, and the main sliding block core-pulling section, the delay sub-sliding block core-pulling section and the delay sub-sliding block maintaining section are all in movable contact with the driving end. Through graded core pulling, the functions of controlling delayed core pulling and the final core pulling distance in the mold opening process are achieved, and therefore the problems that a buckle structure of a double-color injection molding soft rubber product is difficult to mold, the automation degree is low and the production cost is high are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of molds, and in particular relates to a slider graded core-pulling demoulding device, a demoulding method and a two-color injection mold. Background Art

[0002] For some plastic products composed of hard rubber parts and soft rubber parts, two-color injection molding is usually used. Due to the product structure and injection molding process requirements, the product needs to be placed in a two-color injection molding machine for molding. Based on the product structure, the periphery of the product and the inside of the frame mouth need to be molded by secondary soft rubber injection molding. Therefore, when the mold is molding the hard rubber part, it is required to wrap the rubber surface of the soft rubber part through the front mold slider structure. The hard rubber part after injection molding remains in the rear mold cavity, and through the rotation of the two-color molding injection molding machine, the front mold cavity of the soft rubber molding part and the rear mold part and the hard rubber product form the injection molding cavity of the soft rubber part.

[0003] However, when the hard plastic part of the plastic product is being molded, the buckle structure on the outer surface of the product frame cannot be molded. The main reason is that the mold cavity frame cannot avoid the buckle structure when ejecting, resulting in the inability to achieve injection molding of the plastic product without changing the product structure. It is difficult to achieve injection molding of the plastic product with existing mold technology. From the perspective of product structure in mold injection molding, there are mainly the following technical limitations and technical difficulties: 1. Due to the requirements of product structure and product injection molding process, the sliders on both sides of the product need to be designed as two different sliders on the mold to mold the hard rubber part and the soft rubber part respectively. Therefore, the sliders on both sides of the product must be designed on the fixed mold side. During injection molding, the injection molding machine rotates the movable mold part 180° and then closes the mold to achieve the injection molding of the product with the two different sliders on the fixed mold side; 2. The minimum core pulling distance of the sliders on both sides of the product is required to be 15.0mm, and the core pulling distance of the buckle structure on the outer surface of the frame mouth can be greater than 3.0mm. In addition, due to the concave feature at the bottom of the plastic product, it is impossible for the inner and outer sliders to perform side core pulling molding of the product with the same core pulling distance; 3. After the hard plastic part of the product is formed, ensure that the hard plastic part of the product can remain in the dynamic mold cavity after the mold is opened, and ensure that after the injection molding machine drives the dynamic mold part to rotate, the dynamic mold cavity part and the hard plastic product form a soft plastic injection molding cavity with the fixed mold cavity part and the fixed mold slider after the mold is closed, so as to meet the secondary injection molding requirements of the product; 4. Combined with the requirements of product structure, under the conditions of existing mold technology, the injection molding process needs to be changed to meet the injection molding production of this product, that is, two sets of independent molds are used to complete the production on two injection molding machines. First, the hardware part is injection molded on the first injection molding machine, and then the hard plastic injection molded parts are placed in the second set of molds for the molding of the soft plastic part. The disadvantages of this injection molding process are: it occupies a lot of production equipment resources, the positioning error of the secondary placement product is large, resulting in large product size deviation, the gap between the secondary placement product and the mold is large, resulting in serious flash of soft plastic injection molding, and the use of manual or robot to place the hard plastic injection molded parts leads to low automation and high production cost. Summary of the invention

[0004] The purpose of the present invention is to provide a slider graded core-pulling demoulding device, a demoulding method and a two-color injection mold, which are used to solve the above-mentioned problems existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, in the first aspect, the present invention adopts the following technical scheme: a slider graded core-pulling demolding device, comprising a main slider seat, a main slider, a delayed sub-slider, a delayed push strip, a locking block, a delayed guide block and a hook mechanism, wherein the main slider seat is connected to the movable mold through the hook mechanism, a guide hole adapted to the inclined guide column is provided on the main slider seat, a first guide inclined surface is provided on one side of the main slider seat, and the other side of the main slider seat is connected to the main slider, the main slider and the delayed sub-slider are slidably matched, and the main slider and the delayed sub-slider are both provided with a molding surface; the delayed push strip is arranged between the main slider seat and the main slider, and ... One end passes through the main slider and is connected with the delay sub-slider, and an elastic member is provided between the delay push strip and the main slider, and the other end of the delay push strip is provided with a driving end, and the driving end passes through the main slider seat and extends to the outside of the first guide slope; the locking block is connected to the fixed mold, and the locking block is provided with a second guide slope adapted to the first guide slope; the delay guide block is installed on the locking block, and the delay guide block is provided with a main slider core pulling section, a delay sub-slider core pulling section and a delay sub-slider holding section exposed to the second guide slope in sequence, and the main slider core pulling section, the delay sub-slider core pulling section and the delay sub-slider holding section are all in active contact with the driving end.

[0006] As an optional implementation of the above technical solution, the main slider core pulling section and the delay sub-slider holding section are both vertical surfaces, and the delay sub-slider core pulling section is an inclined surface.

[0007] As an optional implementation of the above technical solution, a limiting step is provided on the delay guide block, and the limiting step is arranged at an end of the main slider core pulling section away from the delay sub-slider core pulling section.

[0008] As an optional implementation of the above technical solution, an intermediate boss is provided in the middle of the delayed push strip, the main slider seat is provided with a limiting sliding groove adapted to the intermediate boss, and the elastic member is arranged between one side of the intermediate boss and the main slider.

[0009] As an optional implementation of the above technical solution, the elastic member includes a spring, and the spring is arranged between the middle boss and the main slider.

[0010] As an optional implementation of the above technical solution, it also includes a side pressure plate, which is connected to the fixed mold, and an oblique guide groove is provided on the inner side of the side pressure plate, and an oblique protrusion adapted to the oblique guide groove is provided on the side of the main sliding block seat.

[0011] As an optional implementation of the above technical solution, a limit pin is provided in the inclined guide groove, and a strip groove adapted to the limit pin is opened on the surface of the inclined protrusion.

[0012] As an optional implementation of the above technical solution, it also includes a fixed block, which is connected to the fixed mold, and the inclined guide column is arranged on the fixed block, and a driving spring is provided on the inclined guide column.

[0013] As an optional implementation of the above technical solution, the hook mechanism includes a pulling block and a wedge block, the pulling block is connected to the fixed mold, and the pulling block is provided with a first pulling inclined surface; the wedge block is connected to the main sliding block seat, and the wedge block is provided with a second pulling inclined surface adapted to the first pulling inclined surface, after the first pulling inclined surface and the second pulling inclined surface are separated, the driving spring on the inclined guide column can drive the main sliding block seat to continue the core pulling action.

[0014] In a second aspect, the present invention adopts the following technical scheme: a slider graded core-pulling demoulding method, applied to the slider graded core-pulling demoulding device mentioned above, the slider graded core-pulling demoulding method comprising: The first stage of core pulling: the mold is opened, and the main slider seat is pulled by the hook mechanism, and the main slider seat and the main slider perform core pulling movement along the second guide slope. The driving end of the delayed push strip slides along the core pulling section of the main slider. The delayed sub-slider is closely attached to the hard rubber part of the product under the action of the elastic part and remains relatively static with the hard rubber part. The fixed mold insert of the fixed mold is separated from the hard rubber part of the product, leaving space for the core pulling of the delayed sub-slider, and the core pulling action of the main slider is completed; The second stage of core pulling: the mold continues to open, the main slider seat carries the main slider along the second guide slope to continuously pull the core, the driving end of the delayed push bar slides along the core pulling section of the delayed sub-slider, and the delayed sub-slider performs the core pulling action under the action of the elastic member, so that the delayed sub-slider is gradually separated from the hard rubber part, completing the core pulling action of the delayed sub-slider; The third stage of core pulling: the mold continues to open, the main slider seat carries the main slider along the second guide slope to continue the core pulling action, the driving end of the delayed push strip slides along the delay sub-slider holding section, and the core pulling distance between the delay sub-slider and the hard rubber part remains unchanged to prevent the delay sub-slider from colliding with the buckle structure of the hard rubber part.

[0015] In the third aspect, the present invention adopts the following technical scheme: a two-color injection mold, including the above-mentioned slider graded core-pulling demolding device, and also including a fixed mold and a movable mold, the fixed mold is provided with a soft rubber molding half mold and a hard rubber molding half mold, the soft rubber molding half mold and the hard rubber molding half mold are both provided with a fixed mold insert, the movable mold is provided with a first half mold and a second half mold, the first half mold and the second half mold are both provided with a movable mold insert, the first half mold and the soft rubber molding half mold match each other, the second half mold and the hard rubber molding half mold match each other, and the movable mold is equipped with a rotating drive mechanism, the rotating drive mechanism is used to drive the movable mold to rotate so that the first half mold and the second half mold exchange positions.

[0016] The beneficial effects of the present invention are: The present invention realizes the function of controlling delayed core pulling and the final core pulling distance during the mold opening process through graded core pulling, thereby solving the problems of difficult molding of the buckle structure of the two-color injection molded soft rubber product, low degree of automation and high production cost. In addition, the injection molding process of the entire product has a high degree of automation, avoiding product molding defects caused by manual participation. The injection molding of the product is in a controllable operation process from the production process, mold movement mechanism, injection molding production process, etc., so that the injection molding production molding of the product can achieve high-efficiency, high-quality, and high-stability automated production, and the manufacturing production cost of the product is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a plastic product in one embodiment of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of a slider graded core-pulling demoulding device in one embodiment of the present invention; Figure 3 1 is a top view of a slider graded core-pulling demoulding device in one embodiment of the present invention; Figure 4 yes Figure 3 Middle AA section; Figure 5 yes Figure 3 Middle BB section; Figure 6 It is an exploded schematic diagram of a main slider seat, a main slider and a locking block in one embodiment of the present invention; Figure 7 is a schematic diagram of the structure of a main slider and a delayed sub-slider in one embodiment of the present invention; Figure 8 It is an exploded schematic diagram of a main slider seat, a locking block and a hook mechanism in one embodiment of the present invention; Fig. 9 It is an exploded schematic diagram of a main slider, a delay sub-slider, a delay push bar and a delay guide block in one embodiment of the present invention; Fig.10 is a schematic structural diagram of a delay guide block in one embodiment of the present invention; Fig.11 1 is a schematic structural diagram of a two-color injection mold in one embodiment of the present invention; Fig.12 It is a structural schematic diagram of a fixed mold in one embodiment of the present invention; Fig.13 It is a schematic structural diagram of a movable mold in one embodiment of the present invention.

[0018] In the figure: 1-main slider seat; 2-main slider; 3-delay sub-slider; 4-delay push strip; 5-locking block; 6-delay guide block; 7-oblique guide column; 8-guide hole; 9-driving end; 10-main slider core pulling section; 11-delay sub-slider core pulling section; 12-delay sub-slider holding section; 13-limiting step; 14-middle boss; 15-spring; 16-side pressure plate; 17-oblique guide groove; 18-oblique protrusion; 19-limiting pin; 20-fixed block; 21-driving spring; 22-pull block; 23-wedge block; 24-fixed mold; 25-movable mold; 26-soft rubber molding half mold; 27-hard rubber molding half mold; 28-fixed mold insert; 29-first half mold; 30-second half mold; 31-movable mold insert; 32-soft rubber part; 33-hard rubber part; 34-buckle structure. DETAILED DESCRIPTION

[0019] like Figure 1-Figure 10 As shown, this embodiment provides a slider graded core-pulling demoulding device, which realizes the function of controlling the delayed core-pulling and the final core-pulling distance during the mold opening process through graded core-pulling, thereby solving the problem that the buckle structure 34 of the two-color injection soft plastic product is difficult to form, the degree of automation is low, and the production cost is high. The slider graded core-pulling demoulding device on both sides of the plastic product involved in this solution has the same structure, so the following action description is only analyzed and explained based on the motion analysis of single-side demoulding.

[0020] like Figure 1-Figure 5As shown, the slider graded core-pulling demoulding device comprises a main slider seat 1, a main slider 2, a delayed sub-slider 3, a delayed push strip 4, a locking block 5, a delayed guide block 6 and a hook mechanism. The main slider seat 1 is connected to the movable mold 25 through the hook mechanism. The main slider seat 1 is provided with a guide hole 8 adapted to the inclined guide column 7. One side of the main slider seat 1 is provided with a first guiding inclined surface. The other side of the main slider seat 1 is connected to the main slider 2. The main slider 2 is slidably matched with the delayed sub-slider 3. Both the main slider 2 and the delayed sub-slider 3 are provided with a molding surface. The fixed mold 24 is located above the movable mold 25. The inclined guide column 7 is arranged on the fixed mold 24. The fixed mold 24 has a fixed mold insert 28, and the movable mold 25 has a movable mold 25 insert. The hook mechanism is located at the bottom of the main slider seat 1. The movable mold 25 pulls the main slider seat 1 to move obliquely downward through the hook mechanism.

[0021] like Figure 7 As shown, the delay push strip 4 is arranged between the main slider seat 1 and the main slider 2, one end of the delay push strip 4 penetrates the main slider 2 and is connected to the delay sub-slider 3, and an elastic member is arranged between the delay push strip 4 and the main slider 2, and the other end of the delay push strip 4 is provided with a driving end 9, which penetrates the main slider seat 1 and extends to the outside of the first guide slope. The delay sub-slider 3 can slide relative to the main slider 2 to realize the core pulling action.

[0022] like Figure 8 As shown, the locking block 5 is connected to the fixed mold 24, and the locking block 5 is provided with a second guiding inclined surface adapted to the first guiding inclined surface. When the movable mold 25 pulls the main slider seat 1 to move through the hook mechanism, the first guiding inclined surface cooperates with the second guiding inclined surface to make the main slider seat 1 move obliquely downward.

[0023] like Figure 8 and Fig.10 As shown, the delay guide block 6 is installed on the locking block 5, and the delay guide block 6 is provided with a main slider core-pulling segment 10, a delay sub-slider core-pulling segment 11 and a delay sub-slider retaining segment 12 exposed on the second guide slope in sequence, and the main slider core-pulling segment 10, the delay sub-slider core-pulling segment 11 and the delay sub-slider retaining segment 12 are all in active contact with the driving end 9. The driving end 9 of the delay push bar 4 abuts against the delay guide block 6, and the driving end 9 of the delay push bar 4 slides along the delay guide block 6 to realize the graded core-pulling function.

[0024] Specifically, the main slider core pulling section 10 and the delay sub-slider holding section 12 are both vertical surfaces, and the delay sub-slider core pulling section 11 is an inclined surface. A limiting step 13 is provided on the delay guide block 6, and the limiting step 13 is arranged at one end of the main slider core pulling section 10 away from the delay sub-slider core pulling section 11.

[0025] like Fig. 9As shown, a middle boss 14 is provided in the middle of the delayed push strip 4, a limiting slide groove adapted to the middle boss 14 is provided in the main slider seat 1, and an elastic member is provided between one side of the middle boss 14 and the main slider 2. The elastic member includes a spring 15, and the spring 15 is provided between the middle boss 14 and the main slider 2.

[0026] In order to improve the sliding stability of the main slider seat 1, the slider graded core-pulling demoulding device further includes a side pressure plate 16, which is connected to the fixed mold 24, and an oblique guide groove 17 is provided on the inner side of the side pressure plate 16, and an oblique protrusion 18 adapted to the oblique guide groove 17 is provided on the side of the main slider seat 1. Preferably, a limit pin 19 is provided in the oblique guide groove 17, and the limit pin 19 is installed on the side pressure plate 16 through a cover plate, and a strip groove adapted to the limit pin 19 is opened on the surface of the oblique protrusion 18.

[0027] The slider graded core-pulling demoulding device also includes a fixed block 20, which is connected to the fixed mold 24, and the inclined guide column 7 is arranged on the fixed block 20, and the inclined guide column 7 is provided with a driving spring 21. The hook mechanism includes a pulling block 22 and a wedge block 23, the pulling block 22 is connected to the fixed mold 24, and the pulling block 22 is provided with a first pulling inclined surface; the wedge block 23 is connected to the main slider seat 1, and the wedge block 23 is provided with a second pulling inclined surface adapted to the first pulling inclined surface. After the first pulling inclined surface and the second pulling inclined surface are separated, the driving spring 21 on the inclined guide column 7 can drive the main slider seat 1 to continue the core pulling action. The main slider 2 completes the core pulling movement, the wedge block 23 separates from the pulling block 22, and the main slider 2 maintains the core pulling state under the action of the spring 15 and the limit pin 19. When the mold is closed, the wedge block 23 first contacts the rear mold surface. As the mold closing action proceeds, the main slider seat 1 moves along the oblique guide groove 17 of the side pressure plate 16, and the spring 15 part is gradually compressed and reset. In this process, the wedge block 23 is also pushed into the pull block 22 and pushed down laterally on the locking block 5 to ensure that the wedge block 23 is tightly fitted with the pull block 22, thereby completing the mold closing and reset action.

[0028] The main function of the hook mechanism is to ensure that the main slider 2 and the delayed sub-slider 3 move synchronously with the movable mold 25 at the initial stage of mold opening. The delayed sub-slider 3 is wrapped by the injection molded product, and the clamping force when the delayed sub-slider 3 starts to pull the core is very large. It is impossible to ensure that the product and the delayed sub-slider 3 move closely to the surface of the movable mold 25 by only relying on the drive spring 21 on the inclined guide column 7. The movement principle of the hook mechanism is that when the mold begins to open, the pull block 22 fixed on the movable mold 25 forcibly pulls the wedge block 23 fixed on the main slider seat 1 apart, and keeps the product and the movable mold 25 in contact. When the fixed mold insert 28 moves with the product, the product's clamping force on the delayed sub-slider 3 is also greatly reduced, followed by the core pulling movement of the delayed sub-slider 3, and the thrust of the drive spring 21 on the inclined guide column 7 is sufficient to complete the complete mold opening.

[0029] Combined with the structure of the plastic product and the slider graded core-pulling demoulding device, the delayed sub-slider 3 has a maximum core-pulling distance of 3.9mm due to the outer convex edge of the product structure, while the entire core-pulling distance of the main slider 2 needs to be greater than 15.0mm. Therefore, the delayed sub-slider 3 cannot keep the core-pulling action synchronized with the main slider 2. According to the size of the buckle structure 34 of the product, the buckle feature only needs to be greater than 2.0mm to complete the core-pulling required by the demoulding. Based on the analysis of the mold structure action and the product molding demoulding requirements, the slider graded core-pulling demoulding device is finally designed, and the core-pulling distance of the delayed sub-slider 3 is designed to be 3.0mm.

[0030] Therefore, the demoulding method of the slider graded core pulling demoulding device is mainly divided into the first stage, the second stage and the third stage of core pulling, and its action process is described as follows: 1. Core pulling in the first stage: After the mold is in the mold-closing state and the injection molding is completed, the mold begins to be opened. When the mold opening distance is 0-18.0 mm, the main slider seat 1 is pulled by the hook mechanism, and the main slider seat 1 brings the main slider 2 to perform core pulling along the second guide slope. The driving end 9 of the delay push bar 4 slides along the core pulling section 10 of the main slider. The delay sub-slider 3 is closely attached to the hard rubber part 33 of the product under the action of the elastic member and remains relatively stationary with the hard rubber part 33. The fixed mold insert 28 of the fixed mold 24 is separated from the hard rubber part 33 of the product, leaving space for the core pulling of the delay sub-slider 3, and the core pulling action of the main slider 2 is completed. 2. The second stage of core pulling: the mold continues to open, the mold opening distance is 18.0-27.3mm, the main slider seat 1 brings the main slider 2 to continue to pull the core along the second guide slope, the driving end 9 of the delay push bar 4 enters the delay sub-slider core pulling section 11 from the main slider core pulling section 10 and slides along the delay sub-slider core pulling section 11, the delay sub-slider 3 performs the core pulling action under the action of the elastic member, so that the delay sub-slider 3 is gradually separated from the hard rubber part 33, and the core pulling action of the delay sub-slider 3 is completed; in this process, the main slider 2 also continues to pull the core; 3. The third stage of core pulling: the mold continues to open, and the mold opening distance is 27.3-34.5mm. Because the core pulling distance of the main slider 2 is relatively long, it is necessary to continue to complete the remaining core pulling distance as the mold opens. During this process, the main slider seat 1 leads the main slider 2 along the second guide slope to continue the core pulling action, and the driving end 9 of the delay push bar 4 enters the delay sub-slider holding section 12 from the delay sub-slider core pulling section 11 and slides along the delay sub-slider holding section 12. The core pulling distance between the delay sub-slider 3 and the hard rubber part 33 remains unchanged, ensuring that the delay sub-slider 3 maintains a core pulling distance of 3.0mm to prevent the delay sub-slider 3 from colliding with the buckle structure 34 of the hard rubber part 33.

[0031] When the core pulling is completed on the fixed mold 24 side, the delayed sub-sliders 3 on both sides of the product complete the core pulling distance of 3.0mm, and a 6.0mm channel is left between the two delayed sub-sliders 3, so that the buckle structure 34 on the product can pass through the channel smoothly. In this case, the slider parts on the fixed mold 24 side are disengaged from the movable mold 25 surface as a whole, ensuring that the product is retained in the mold cavity on the movable mold 25 side. After the mold is fully opened, the molded product is ejected from the mold cavity, and then the injection molding machine rotates and closes the mold to cooperate with the mold cavity on the fixed mold 24 side of the soft plastic molding to carry out the next cycle of molding process.

[0032] The various parts and components constituting the present invention are made of self-made processed parts and standard spring structures. The self-made processed parts can be processed by existing processing equipment and can fully meet the precision requirements of the structural components, so that the assembly interchangeability of the parts and components of the present invention is particularly high, the procurement cost of standard spring parts is low, and they are easy to maintain and replace.

[0033] In summary, the present invention has a high degree of automation in the entire product injection molding process, avoiding product molding defects caused by manual participation, and from the above process description, it can be concluded that the injection molding of the product is in a controllable operation process from the production process, mold movement mechanism, injection molding production process, etc., so that the injection molding production of the product can achieve high-efficiency, high-quality, and high-stability automated production, and the manufacturing production cost of the product is greatly reduced.

[0034] like Figure 11-13 As shown, the present embodiment further provides a two-color injection mold, including the above-mentioned slider graded core-pulling demolding device, and also including a fixed mold 24 and a movable mold 25. The fixed mold 24 is provided with a soft glue molding half mold 26 and a hard glue molding half mold 27. The soft glue molding half mold 26 and the hard glue molding half mold 27 are both provided with a fixed mold insert 28. The movable mold 25 is provided with a first half mold 29 and a second half mold 30. The first half mold 29 and the second half mold 30 are both provided with a movable mold 25 insert. The first half mold 29 matches the soft glue molding half mold 26, and the second half mold 30 matches the hard glue molding half mold 27. The movable mold 25 is equipped with a rotating drive mechanism, which is used to drive the movable mold 25 to rotate 180 degrees so that the first half mold 29 and the second half mold 30 can interchange positions.

[0035] The injection molding method of the double-color injection mold comprises the following steps: Step A: The fixed mold 24 and the movable mold 25 are closed, and the soft rubber part 32 is injection molded between the first half mold 29 and the soft rubber molding half mold 26; Step B: the fixed mold 24 and the movable mold 25 are opened, and the soft rubber part 32 remains in the first half mold 29; Step C: driving the movable mold 25 to rotate 180 degrees, the first half mold 29 and the second half mold 30 are exchanged, the fixed mold 24 and the movable mold 25 are closed, and the hard plastic part 33 is injection molded between the first half mold 29 and the hard plastic molding half mold 27, and the hard plastic part 33 is connected with the soft plastic part 32 as a whole; Step D: The fixed mold 24 and the movable mold 25 are opened, and through the first stage core pulling, the second stage core pulling and the third stage core pulling, the delayed sub-slider 3 maintains a core pulling distance of 3.0 mm, and the ejector pin of the movable mold 25 is used to eject the injected product out of the mold cavity.

[0036] After the mold completes one injection molding and ejects the completed soft rubber product, the movable mold 25 is rotated 180 degrees by the injection molding machine, the first half mold 29 and the second half mold 30 are interchanged, and then the molds are closed to complete the secondary injection molding, forming a hard rubber product on the soft rubber product, and finally ejecting the finished product, and this reciprocating cycle is repeated to realize the continuous injection molding production of the mold for the product.

[0037] Compared with the prior art, the present invention has the following advantages: 1. Solved the problem of using a single injection molding process for two-color injection molding products; 2. High degree of automation saves machine equipment resources and reduces the production site occupation, thus reducing product manufacturing costs; 3. Avoid the secondary placement of hard plastic injection molded parts, and improve the size qualification rate of products; 4. The fully automatic production process is adopted to shorten the product injection molding cycle; 5. The mechanism movement is single, and the production movement is stable and reliable; 6. The components are precisely processed and manufactured, which prolongs the service life of the mold; 7. The mold is easy to repair and maintain, and the production and maintenance cost is low.

[0038] In the description of the present invention, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, and may be fixedly connected, detachably connected, or integrated; may be mechanically connected or electrically connected; may be directly connected or indirectly connected through an intermediate medium, may be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood. In addition, the specific features, structures, etc. described in the embodiments are included in at least one embodiment. Under the condition that there is no contradiction, those skilled in the art may combine the features of different embodiments. The protection scope of the present invention is not limited to the above-mentioned specific embodiments. According to the basic technical concept of the present invention, the embodiments that can be associated with by ordinary technicians in this field without creative work all belong to the protection scope of the present invention.

Claims

1. A slider graded core-pulling demoulding device, characterized in that: The invention comprises a main slider seat (1), a main slider (2), a delay sub-slider (3), a delay push strip (4), a locking block (5), a delay guide block (6) and a hook mechanism, wherein the main slider seat (1) is connected to a movable mold (25) via the hook mechanism, a guide hole (8) adapted to an inclined guide column (7) is provided on the main slider seat (1), a first guide inclined surface is provided on one side of the main slider seat (1), and the other side of the main slider seat (1) is connected to the main slider (2), the main slider (2) and the delay sub-slider (3) are slidably matched, and both the main slider (2) and the delay sub-slider (3) are provided with a molding surface; The delay push strip (4) is arranged between the main slider seat (1) and the main slider (2), one end of the delay push strip (4) passes through the main slider (2) and is connected to the delay sub-slider (3), and an elastic member is provided between the delay push strip (4) and the main slider (2), and the other end of the delay push strip (4) is provided with a driving end (9), and the driving end (9) passes through the main slider seat (1) and extends to the outside of the first guide inclined surface; The locking block (5) is connected to the fixed mold (24), and the locking block (5) is provided with a second guide bevel adapted to the first guide bevel; the delay guide block (6) is mounted on the locking block (5), and the delay guide block (6) is provided with a main slider core-pulling segment (10), a delay sub-slider core-pulling segment (11) and a delay sub-slider retaining segment (12) exposed on the second guide bevel in sequence, and the main slider core-pulling segment (10), the delay sub-slider core-pulling segment (11) and the delay sub-slider retaining segment (12) are all in active contact with the driving end (9).

2. The slider graded core-pulling demoulding device according to claim 1 is characterized in that: The main slider core-pulling section (10) and the delayed sub-slider retaining section (12) are both vertical surfaces, and the delayed sub-slider core-pulling section (11) is an inclined surface.

3. The slider graded core-pulling demoulding device according to claim 1 is characterized in that: The delay guide block (6) is provided with a limiting step (13), and the limiting step (13) is arranged at one end of the main slider core pulling section (10) away from the delay sub-slider core pulling section (11).

4. The slider graded core-pulling demoulding device according to claim 3 is characterized in that: The middle part of the delayed push strip (4) is provided with an intermediate boss (14), the main slider seat (1) is provided with a limiting slide groove adapted to the intermediate boss (14), and the elastic member is arranged between one side of the intermediate boss (14) and the main slider (2).

5. The slider graded core-pulling demoulding device according to claim 4 is characterized in that: The elastic member comprises a spring (15), and the spring (15) is arranged between the middle boss (14) and the main slider (2).

6. The slider graded core-pulling demoulding device according to claim 1 is characterized in that: The main sliding block (1) further comprises a side pressure plate (16), wherein the side pressure plate (16) is connected to the fixed mold (24), an oblique guide groove (17) is provided on the inner side of the side pressure plate (16), and an oblique protrusion (18) adapted to the oblique guide groove (17) is provided on the side of the main sliding block seat (1); a limit pin (19) is provided in the oblique guide groove (17), and a strip groove adapted to the limit pin (19) is provided on the surface of the oblique protrusion (18).

7. The slider graded core-pulling demoulding device according to claim 1 is characterized in that: It also comprises a fixed block (20), the fixed block (20) being connected to the fixed mold (24), the inclined guide column (7) being arranged on the fixed block (20), and a driving spring (21) being arranged on the inclined guide column (7).

8. The slider graded core-pulling demoulding device according to claim 7 is characterized in that: The hook mechanism comprises a pulling block (22) and a wedge-locking block (23); the pulling block (22) is connected to the fixed die (24); the pulling block (22) is provided with a first pulling inclined surface; the wedge-locking block (23) is connected to the main slider seat (1); the wedge-locking block (23) is provided with a second pulling inclined surface adapted to the first pulling inclined surface; after the first pulling inclined surface and the second pulling inclined surface are separated, the driving spring (21) on the inclined guide column (7) can drive the main slider seat (1) to continue the core pulling action.

9. A slider graded core-pulling demoulding method, characterized in that: Applicable to the slider graded core-pulling demoulding device according to any one of claims 1 to 8, the slider graded core-pulling demoulding method comprises: The first stage of core pulling: the mold is opened, and the main slider seat (1) is pulled by the hook mechanism, and the main slider seat (1) brings the main slider (2) to perform core pulling movement along the second guide slope, and the driving end (9) of the delay push bar (4) slides along the core pulling section (10) of the main slider, and the delay sub-slider (3) is tightly attached to the hard rubber part (33) of the product under the action of the elastic member and maintains a relatively static state with the hard rubber part (33), and the fixed mold insert (28) of the fixed mold (24) is separated from the hard rubber part (33) of the product, leaving space for the core pulling of the delay sub-slider (3), completing the core pulling action of the main slider (2); The second stage of core pulling: the mold continues to open, the main slider seat (1) leads the main slider (2) to continue to pull the core along the second guide slope, the driving end (9) of the delay push bar (4) slides along the delay sub-slider core pulling section (11), and the delay sub-slider (3) performs a core pulling action under the action of the elastic member, so that the delay sub-slider (3) is gradually separated from the hard rubber part (33), completing the core pulling action of the delay sub-slider (3); The core pulling in the third stage: the mold continues to open, the main slider seat (1) leads the main slider (2) to continue the core pulling action along the second guide slope, the driving end (9) of the delay push bar (4) slides along the delay sub-slider retaining section (12), and the core pulling distance between the delay sub-slider (3) and the hard rubber part (33) remains unchanged to prevent the delay sub-slider (3) from colliding with the buckle structure (34) of the hard rubber part (33).

10. A two-color injection mold, characterized in that: The slider grading core-pulling demoulding device comprises the device according to any one of claims 1 to 8, and further comprises a fixed mold (24) and a movable mold (25), wherein the fixed mold (24) is provided with a soft rubber molding half mold (26) and a hard rubber molding half mold (27), and the soft rubber molding half mold (26) and the hard rubber molding half mold (27) are both provided with a fixed mold insert (28), and the movable mold (25) is provided with a first half mold (29) and a second half mold (30), and the first half mold (29) and the second half mold (30) are both provided with a movable mold (25) insert, the first half mold (29) and the soft rubber molding half mold (26) are matched with each other, and the second half mold (30) and the hard rubber molding half mold (27) are matched with each other, and the movable mold (25) is equipped with a rotating drive mechanism, and the rotating drive mechanism is used to drive the movable mold (25) to rotate so that the first half mold (29) and the second half mold (30) are interchanged.

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