Core-pulling structure, two-color mold and mold system

Abstract

The application discloses a core-pulling structure, a double-color mold and a mold system, wherein the core-pulling structure is applied to an injection mold, the injection mold comprises a back mold and a front mold, the direction of the front mold away from the back mold is a mold opening direction, a core-pulling direction is defined to intersect the mold opening direction, the core-pulling structure comprises a row position sliding block and a bevel shovel, the row position sliding block is arranged on the back mold, the row position sliding block reciprocates along the core-pulling direction, the row position sliding block is provided with a sliding hole, the sliding hole extends along the mold opening direction, and the side wall of the end of the sliding hole away from the mold opening direction is inclined to the core-pulling direction to form a first inclined surface; the bevel shovel is arranged on the back mold, the bevel shovel is located on the side of the row position sliding block provided with the first inclined surface, and the bevel shovel reciprocates along the mold opening direction; wherein when the bevel shovel moves along the mold opening direction, the bevel shovel is inserted into the sliding hole, abuts against the first inclined surface and pushes the row position sliding block to move along the core-pulling direction. The technical scheme of the application can solve the problem that the core-pulling structure of the double-color mold is difficult to pull the core when the core-pulling stroke is long.

Description

Technical Field

[0001] This invention relates to the field of two-color mold technology, and particularly to a core-pulling structure, a two-color mold, and a mold system. Background Technology

[0002] Two-color molding refers to the process of injecting two different plastic materials onto the same injection molding machine, forming the product in two separate processes, but the product only exits the mold once. This molding process is also generally called two-material injection molding, and it is usually completed using a single mold.

[0003] The existing two-color mold includes a front mold and a rear mold. When the first color is closed, the front mold's base pushes back into the rear mold's sliding mechanism. When the mold opens, the bottom of the sliding mechanism uses wave-shaped positioning to maintain the sliding mechanism's closed state, and both the product and the sliding mechanism remain unchanged. When the second color is closed, the front mold rotates to switch to a mold with angled guide pillars. The angled guide pillars are pressed into the angled guide pillar holes and forcefully press the rear mold's sliding pins. The sliding pins retract under force. When the sliding pins retract along the angled guide groove to the maximum outer edge of the angled guide pillar, the angled guide pillar can enter the sliding guide pillar hole. After the sliding pins are no longer driven by the angled guide pillar, they spring back to their original position. When the mold opens, the angled guide pillars abut against the sliding pins, causing the sliding mechanism to retract with the mold opening action, thereby completing the core-pulling action.

[0004] In existing core-pulling structures, during the second color mold opening, the separation of the front and rear molds causes the inclined guide pillars to rise. The tilt of the inclined guide pillars then causes the sliding mechanism to retract, thus achieving the core-pulling action. The more inclined the inclined guide pillars are, the longer the core-pulling stroke of the sliding mechanism. However, when the inclined guide pillars are tilted to a certain extent, they may have difficulty entering the inclined guide pillar holes, making it impossible to complete the second color mold closing. Therefore, the core-pulling stroke of this type of structure is not very long and cannot meet the requirements for a longer core-pulling stroke. Summary of the Invention

[0005] The main objective of this invention is to provide a core-pulling structure that addresses the problem of difficulty in core-pulling in two-color molds when the core-pulling stroke is long.

[0006] To achieve the above objectives, the present invention proposes a core-pulling structure applied to an injection mold. The injection mold includes a rear mold and a front mold. The direction of the front mold away from the rear mold is the mold opening direction. The core-pulling direction is defined to intersect with the mold opening direction. The core-pulling structure includes:

[0007] A sliding block, disposed on the rear mold, reciprocates along the core-pulling direction, and has a sliding hole extending along the mold opening direction. The sidewall of the end of the sliding hole away from the mold opening direction is inclined towards the core-pulling direction to form a first inclined surface; and

[0008] An inclined shovel is provided on the rear mold, and the inclined shovel is located on the side of the slide block where the first inclined surface is provided. The inclined shovel reciprocates along the mold opening direction.

[0009] When the slanted shovel moves along the mold opening direction, it inserts into the sliding hole, abuts against the first inclined surface, and pushes the sliding block to move along the core pulling direction.

[0010] Optionally, the sliding hole includes:

[0011] A vertical segment, which extends along the mold opening direction; and

[0012] An inclined segment, one end of which is connected to the end of the vertical segment away from the mold opening direction, and the other end of which passes through the slide block and forms the first inclined surface on the side facing the core pulling direction.

[0013] Optionally, the shovel includes:

[0014] A long straight section, the long straight section extending away from the mold opening direction; and

[0015] The inclined section has one end connected to the end of the long straight section facing the mold opening direction, and the other end of the inclined section forms a second inclined surface on the side close to the core pulling direction. The second inclined surface has the same inclination direction as the first inclined surface and is arranged opposite to the first inclined surface.

[0016] The present invention also proposes a two-color mold, comprising:

[0017] The rear mold includes a rear mold body and a core-pulling structure. The sliding block of the core-pulling structure is slidably connected to the rear mold body, and the angled spade of the core-pulling structure is movably connected to the rear mold body.

[0018] The front mold covers the rear mold body;

[0019] The core-pulling structure includes:

[0020] A sliding block, disposed on the rear mold, reciprocates along the core-pulling direction, and has a sliding hole extending along the mold opening direction. The sidewall of the end of the sliding hole away from the mold opening direction is inclined towards the core-pulling direction to form a first inclined surface; and

[0021] An inclined shovel is provided on the rear mold, and the inclined shovel is located on the side of the slide block where the first inclined surface is provided. The inclined shovel reciprocates along the mold opening direction.

[0022] When the slanted shovel moves along the mold opening direction, it inserts into the sliding hole, abuts against the first inclined surface, and pushes the sliding block to move along the core pulling direction.

[0023] Optionally, the rear mold body is provided with a slide rail, the slide rail extends along the mold opening direction, the slide rail is located at one end of the sliding hole of the sliding block opposite to the mold opening direction and passes through the sliding hole, the inclined shovel is inserted into the slide rail and can reciprocate along the slide rail.

[0024] Optionally, the rear mold further includes a guide block, which is embedded in the rear mold body and located at the end of the slide that faces away from the mold opening direction, and the slide passes through the guide block.

[0025] Optionally, the rear mold further includes a base, the base comprising:

[0026] The base body, and the rear mold body are fixedly connected to the base body;

[0027] The first plate is movably connected to the base body and can reciprocate along the mold opening direction. The end of the inclined shovel away from the mold opening direction is fixedly connected to the first plate. The first plate has a connection station for connecting to an injection molding machine to drive the first plate to reciprocate.

[0028] Optionally, the base further includes:

[0029] A second plate is located on the side of the first plate away from the mold opening direction. The second plate is spaced apart from the first plate and is movably connected to the base body. The second plate can reciprocate along the mold opening direction.

[0030] An ejector pin, one end of which is fixedly connected to the second plate, and the other end of which is inserted into the rear mold body and used to eject the mold core.

[0031] Optionally, the base further includes a connector, one end of which is fixedly connected to the first plate and the other end of which is movably connected to the second plate. The first plate drives the second plate to move along the mold opening direction.

[0032] Optionally, the second plate is provided with a countersunk hole, which includes a countersunk hole and a through hole arranged coaxially. The diameter of the countersunk hole is larger than the diameter of the through hole. The countersunk hole is located on the side of the through hole away from the mold opening direction and communicates with the through hole. The countersunk hole and the through hole penetrate the second plate along the mold opening direction.

[0033] Optionally, the base further includes a base fastening assembly, which connects the first plate and the second plate respectively. When the first plate drives the second plate to move along the mold opening direction, the base fastening assembly separates the first plate and the second plate.

[0034] Optionally, the clasp assembly includes:

[0035] A top base slider, wherein the top base slider is spring-connected to the second plate;

[0036] Top base shovel, the top base shovel being fixedly connected to the first plate; and

[0037] Top base hook, which is fixedly connected to the base body;

[0038] When the top base shovel moves along the mold opening direction with the first plate, the top base hook hooks onto the top base slider.

[0039] Optionally, the side of the top base slider away from the mold opening direction is a third inclined surface, and the third inclined surface is away from the spring;

[0040] When the top base shovel moves along the mold opening direction with the first plate, the top base shovel presses against the third inclined surface to cause the top base slider to contract.

[0041] The present invention also proposes a mold system, including an injection molding machine and a two-color mold, wherein the injection molding machine is connected to the two-color mold, and the two-color mold includes:

[0042] The rear mold includes a rear mold body and a core-pulling structure. The sliding block of the core-pulling structure is slidably connected to the rear mold body, and the angled spade of the core-pulling structure is movably connected to the rear mold body.

[0043] The front mold covers the rear mold body;

[0044] The core-pulling structure includes:

[0045] A sliding block, disposed on the rear mold, reciprocates along the core-pulling direction, and has a sliding hole extending along the mold opening direction. The sidewall of the end of the sliding hole away from the mold opening direction is inclined towards the core-pulling direction to form a first inclined surface; and

[0046] An inclined shovel is provided on the rear mold, and the inclined shovel is located on the side of the slide block where the first inclined surface is provided. The inclined shovel reciprocates along the mold opening direction.

[0047] When the slanted shovel moves along the mold opening direction, it inserts into the sliding hole, abuts against the first inclined surface, and pushes the sliding block to move along the core pulling direction.

[0048] This invention employs a slanted spade located on the rear mold side of the slide block with a first inclined surface. When the slanted spade moves along the mold opening direction, it inserts into the sliding hole and abuts against the first inclined surface, causing sliding between them. At this point, the slanted spade applies a force along the mold opening direction to the inclined surface. Since the slide block can move back and forth in the core-pulling direction, this force pushes the inclined surface, thereby pushing the slide block to move along the core-pulling direction to complete the core-pulling action. Compared to the method of using slanted guide pillars in the front mold to push the slide block, this invention eliminates the need for slanted guide pillars, thus avoiding the difficulty in inserting slanted guide pillars due to excessively long core-pulling strokes. This allows for a longer core-pulling stroke, solving the problem of difficult core-pulling in two-color molds when the core-pulling stroke is long. Furthermore, since there is no need to insert angled guide pillars, the slide spring pins that cooperate with the angled guide pillars are also unnecessary. This avoids the angled guide pillars squeezing the slide spring pins, which can cause the slide spring pins to bend. On the one hand, it avoids the risk of mold collision caused by the angled guide pillars being unable to be pulled out when the mold is opened due to the bending of the slide spring pins. On the other hand, it eliminates the need for manual repair of the easily bent slide spring pins, as well as the need to manufacture and install the slide spring pins, thus saving costs. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0050] Figure 1 This is a cross-sectional view of an embodiment of the core-pulling structure of the present invention;

[0051] Figure 2 This is a partial structural cross-sectional view of an embodiment of the two-color mold of the present invention during mold opening;

[0052] Figure 3 This is a partial structural cross-sectional view of a two-color mold according to an embodiment of the present invention during core pulling;

[0053] Figure 4 This is a partial structural diagram of a two-color mold according to an embodiment of the present invention during mold closing;

[0054] Figure 5 This is a partial structural diagram of a two-color mold according to an embodiment of the present invention during mold opening.

[0055] Explanation of icon numbers:

[0056] label name label name 1000 Two-color mold 30 base 100 rear mold 31 Base body 10 Rear mold body 32 First plate 10a slide 33 Second plate 11 Guide block 331 countersunk hole 20 Core-pulling structure 331a Countersunk hole 21 Line slider 331b Via 211 Sliding hole 34 thimble 2111 vertical segment 35 connector 2113 Inclined section 36 Snap-on base assembly 2113a First inclined surface 361 Top base slider 23 Angled shovel 363 Top base shovel 231 Long straight section 3631 Third inclined surface 233 slope section 365 Top base hook 2331 Second inclined surface 300 front mold

[0057] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0058] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0059] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0060] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0061] This invention proposes a core-pulling structure.

[0062] like Figures 1 to 4 As shown, in one embodiment of the core-pulling structure 20 of the present invention, the core-pulling structure 20 is applied to an injection mold. The injection mold includes a rear mold 100 and a front mold 300. The direction of the front mold 300 away from the rear mold 100 is the mold opening direction. The core-pulling direction is defined to intersect with the mold opening direction. The core-pulling structure 20 includes a sliding block 21 and a slanted shovel 23. The sliding block 21 is disposed in the rear mold 100. The sliding block 21 reciprocates along the core-pulling direction. The sliding block 21 is provided with a sliding hole 211. The sliding hole 211 extends along the mold opening direction. The side wall of the end of the sliding hole 211 away from the mold direction is inclined toward the core-pulling direction to form a first inclined surface 2113a. The slanted shovel 23 is disposed in the rear mold 100. The slanted shovel 23 is located on the side of the sliding block 21 where the first inclined surface 2113a is provided. The slanted shovel 23 reciprocates along the mold opening direction. When the slanted shovel 23 moves along the mold opening direction, it inserts into the sliding hole 211, abuts against the first inclined surface 2113a, and pushes the sliding block 21 to move along the core pulling direction.

[0063] In this embodiment, the mold opening direction refers to the direction in which the front mold 300 and the rear mold 100 separate during mold opening, and the core pulling direction refers to the direction of movement of the sliding block 21 during demolding. The sliding hole 211 extends along the mold opening direction, and the sidewall of the end of the sliding hole 211 furthest from the mold direction is inclined toward the core pulling direction to form a first inclined surface 2113a, so that the end of the sliding hole 211 furthest from the mold direction is gradually enlarged. The first inclined surface 2113a is set at an angle to the mold opening direction, and this angle is greater than 0°, that is, the first inclined surface 2113a is set at an angle to the direction of movement of the inclined spade 23. A slanted spade 23 is disposed on the rear mold 100, and is positioned opposite to the first inclined surface 2113a. When the slanted spade 23 moves along the mold opening direction, it abuts against the first inclined surface 2113a and slides on it. At this time, the slanted spade 23 applies a force along the mold opening direction to the inclined surface. Since the slide block 21 can move back and forth in the core-pulling direction, this force pushes the inclined surface, thereby pushing the slide block 21 to move along the core-pulling direction to complete the core-pulling action. Compared with the method of pushing the slide block through the slanted guide post of the front mold 300, this embodiment of the present invention does not require the insertion of the slanted guide post, thus avoiding the difficulty in inserting the slanted guide post due to the excessively long core-pulling stroke. This allows for a longer core-pulling stroke and solves the problem that the core-pulling structure 20 of the injection mold is difficult to pull when the core-pulling stroke is long. Furthermore, since there is no need to insert angled guide pillars, the slide spring pins that cooperate with the angled guide pillars are also unnecessary. This avoids the angled guide pillars squeezing the slide spring pins, which can cause the slide spring pins to bend. On the one hand, it avoids the risk of mold collision caused by the angled guide pillars being unable to be pulled out when the mold is opened due to the bending of the slide spring pins. On the other hand, it eliminates the need for manual repair of the easily bent slide spring pins, as well as the need to manufacture and install the slide spring pins, thus saving costs.

[0064] Furthermore, it should be noted that the slide block 21 can move back and forth in the core-pulling direction by providing a guide groove extending along the core-pulling direction in the rear mold 100, allowing the slide block 21 to slide in the guide groove; or by providing a guide rod extending along the core-pulling direction, through which the slide block 21 passes, allowing the slide block 21 to move back and forth in the core-pulling direction; or by other effective methods for allowing the slide block 21 to move back and forth in the core-pulling direction.

[0065] The slanted shovel 23 can reciprocate along the mold opening direction by providing a guide hole extending along the mold opening direction in the rear mold 100, with the slanted shovel 23 in the guide hole, allowing the slanted shovel 23 to move back and forth in the mold opening direction; alternatively, it can be achieved by providing a guide rail extending along the mold opening direction, with the slanted shovel 23 sliding along the guide rail, allowing the slanted shovel 23 to move back and forth in the mold opening direction; other effective methods can also be used to achieve the reciprocating motion of the slanted shovel 23 along the mold opening direction.

[0066] like Figure 1 and Figure 2As shown, in one embodiment of the core-pulling structure 20 of the present invention, the sliding hole 211 includes a vertical section 2111 and an inclined section 2113, the vertical section 2111 extending along the mold opening direction. One end of the inclined section 2113 is connected to the end of the vertical section 2111 away from the mold direction, and the other end of the inclined section 2113 passes through the sliding block 21 and forms a first inclined surface 2113a on the side facing the core-pulling direction.

[0067] In this embodiment, the vertical segment 2111 extends along the mold opening direction within the sliding block 21. The vertical segment 2111 may or may not penetrate the sliding block 21, depending on the required stroke of the inclined shovel 23. One end of the inclined segment 2113 is connected to the end of the vertical segment 2111 facing away from the mold opening direction, and the inclined segment 2113 is connected to the vertical segment 2111. The other end of the inclined segment 2113 penetrates a surface of the sliding block 21 facing away from the mold opening direction. The inclined segment 2113 forms a first inclined surface 2113a by cutting the wall surface near the core-pulling direction, such that the first inclined surface 2113a is set at an angle to the core-pulling direction. This arrangement allows the inclined shovel 23 to first enter the inclined segment 2113 when inserted into the sliding hole 211, thus pushing the first inclined surface 2113a first, causing the sliding block 21 to move along the core-pulling direction.

[0068] like Figures 1 to 4 As shown, in one embodiment of the core-pulling structure 20 of the present invention, the inclined shovel 23 includes a long straight section 231 and an inclined section 233. The long straight section 231 extends along the direction away from the mold opening direction. One end of the inclined section 233 is connected to the end of the long straight section 231 facing the mold opening direction. The other end of the inclined section 233 forms a second inclined surface 2331 on the side close to the core-pulling direction. The second inclined surface 2331 has the same inclination direction as the first inclined surface 2113a. The second inclined surface 2331 is disposed opposite to the first inclined surface 2113a.

[0069] In this embodiment, the long straight segment 231, also known as the straight line segment, extends linearly along the direction away from the mold opening direction. One end of the long straight segment 231 facing the mold opening direction connects to one end of the inclined segment 233. The opposite end of the inclined segment 233 forms a second inclined surface 2331; that is, the end of the inclined segment 233 facing the mold opening direction has a second inclined surface 2331. This second inclined surface 2331 is formed by cutting the side of the inclined segment 233 near the core-pulling direction; that is, the second inclined surface 2331 is formed by cutting between the side of the inclined segment 233 facing the core-pulling direction and the end face of the inclined segment 233 facing the mold opening direction. The second inclined surface 2331 is in the same direction as the first inclined surface 2113a, so that the second inclined surface 2331 fits against the first inclined surface 2113a. When the shovel 23 is inserted into the sliding hole 211, the second inclined surface 2331 slides along the first inclined surface 2113a, so that the shovel 23 can more easily push the sliding block 21 to move along the core-pulling direction.

[0070] This invention also proposes a two-color mold 1000, which includes a rear mold 100 and a front mold 300. The rear mold 100 includes a rear mold body 10 and a core-pulling structure 20. The sliding block 21 of the core-pulling structure 20 is slidably connected to the rear mold body 10, and the inclined spade 23 of the core-pulling structure 20 is movably connected to the rear mold body 10. The front mold 300 covers the rear mold body 10. The specific structure of the core-pulling structure 20 is as described in the above embodiments. Since this two-color mold 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0071] like Figures 1 to 3 As shown, in one embodiment of the two-color mold 1000 of the present invention, the two-color mold 1000 includes a front mold 300 and a rear mold 100. When the first color is closed, the spade base of the front mold 300 presses back the slide block 21 of the rear mold 100. When the mold is opened, the bottom of the slide block 21 is positioned by a wave-shaped mechanism to maintain the closed state of the slide block 21, and the product and the slide block 21 remain unchanged. When the second color is closed, the front mold 300 covers the rear mold 100, that is, the front mold 300 covers the rear mold body 10. When the mold is opened, the front mold 300 separates from the rear mold 100, and the core-pulling structure 20 in the rear mold 100 completes the core-pulling action. Specifically, the inclined spade 23 moves along the mold opening direction, pushing the slide block 21 to move along the core-pulling direction, thereby completing the core-pulling action.

[0072] like Figure 2 and Figure 3 As shown, in one embodiment of the two-color mold 1000 of the present invention, the rear mold body 10 is provided with a slide 10a. The slide 10a extends along the mold opening direction. The slide 10a is located at the end of the slide hole 211 of the sliding block 21 that is away from the mold direction and passes through the slide hole 211. The inclined shovel 23 is inserted into the slide 10a and can reciprocate along the slide 10a.

[0073] In this embodiment, the slide 10a extends along the mold opening direction. The end of the slide 10a facing the mold opening direction is opposite to the end of the sliding hole 211 facing away from the mold opening direction, and the slide 10a and the sliding hole 211 are interconnected. The inclined spade 23 moves along the slide 10a, thereby moving along the mold opening direction, and inserts into the sliding hole 211 through the slide 10a, thereby pushing the sliding block 21 to move along the core-pulling direction to complete the core-pulling action. The slide 10a ensures that the inclined spade 23 moves along the core-pulling direction and accurately inserts into the sliding hole 211, thus serving a guiding function.

[0074] like Figure 2 and Figure 3As shown, in one embodiment of the two-color mold 1000 of the present invention, the rear mold 100 further includes a guide block 11, which is embedded in the rear mold body 10 and located at one end of the slide 10a away from the mold direction, and the slide 10a passes through the guide block 11.

[0075] In this embodiment, the slide 10a penetrates the rear mold body 10 along the mold opening direction. The rear mold 100 is also provided with a guide block 11. The guide block 11 is located at the end of the slide 10a away from the mold opening direction and is penetrated by the slide 10a. Thus, the shovel 23 needs to pass through the guide block 11 before entering the slide 10a. The guide block 11 limits the shovel 23 on a plane perpendicular to the mold opening direction. That is, the shovel 23 is limited by the guide block 11 in the circumferential direction perpendicular to the mold opening direction, thereby correcting the movement trajectory of the shovel 23 and enabling the shovel 23 to be accurately inserted into the slide hole 211, thereby pushing the sliding block 21 to move along the core pulling direction.

[0076] like Figure 2 and Figure 3 As shown, in one embodiment of the two-color mold 1000 of the present invention, the rear mold 100 further includes a base 30, which includes a base body 31 and a first plate 32. The rear mold body 10 is fixedly connected to the base body 31. The first plate 32 is movably connected to the base body 31 and can reciprocate along the mold opening direction. The end of the inclined shovel 23 away from the mold direction is fixedly connected to the first plate 32. The first plate 32 has a connecting station for connecting to an injection molding machine to drive the first plate 32 to reciprocate.

[0077] In this embodiment, the rear mold body 10 is fixedly connected to the base body 31. The inclined shovel 23 is inserted into the slide rail 10a of the rear mold body 10. One end of the inclined shovel 23 away from the mold opening direction is fixedly connected to the first plate 32. The first plate 32 is movably connected to the base body 31 and can reciprocate along the mold opening direction. The first plate 32 has a connecting station for connecting to the injection molding machine. Specifically, the injection molding machine drives the first plate 32 to move along the mold opening direction, and the first plate 32 drives the inclined shovel 23 to move along the mold opening direction, thereby causing the inclined shovel 23 to push the slide block 21 to move along the core pulling direction to complete the core pulling action.

[0078] Furthermore, it should be noted that the reciprocating motion of the first plate 32 along the mold opening direction can be achieved by providing a guide groove extending along the mold opening direction in the base body 31, allowing the first plate 32 to slide in the guide groove, thereby enabling the first plate 32 to move back and forth in the core pulling direction; alternatively, it can be achieved by providing a guide rod extending along the core pulling direction, through which the first plate 32 passes, thereby enabling the first plate 32 to move back and forth in the core pulling direction; or other effective methods can be used to enable the first plate 32 to reciprocate along the mold opening direction.

[0079] like Figure 2 and Figure 3 As shown, in one embodiment of the two-color mold 1000 of the present invention, the base 30 further includes a second plate 33 and an ejector pin 34. The second plate 33 is located on the side of the first plate 32 away from the mold direction. The second plate 33 is spaced apart from the first plate 32. The second plate 33 is movably connected to the base body 31 and can reciprocate along the mold opening direction. One end of the ejector pin 34 is fixedly connected to the second plate 33, and the other end of the ejector pin 34 is inserted into the rear mold body 10 and used to eject the mold core.

[0080] In this embodiment, the second plate 33 is located away from the mold opening direction of the first plate 32 and is spaced apart from the first plate 32. The second plate 33 is movably connected to the base body 31 and can reciprocate along the mold opening direction. The ejector pin 34 is used to eject the molded core, that is, to eject the injection-molded finished product. Specifically, one end of the ejector pin 34 is fixedly connected to the second plate 33. The second plate 33 moves along the mold opening direction and drives the ejector pin 34, causing the other end of the ejector pin 34 to eject the mold core along the mold opening direction.

[0081] Furthermore, it should be noted that the reciprocating motion of the second plate 33 along the mold opening direction can be achieved by providing a guide groove extending along the mold opening direction in the base body 31, allowing the second plate 33 to slide in the guide groove, thereby enabling the second plate 33 to move back and forth in the core pulling direction; alternatively, it can be achieved by providing a guide rod extending along the core pulling direction, through which the second plate 33 passes, thereby enabling the second plate 33 to move back and forth in the core pulling direction; or other effective methods can be used to enable the second plate 33 to reciprocate along the mold opening direction.

[0082] like Figures 2 to 4 As shown, in one embodiment of the two-color mold 1000 of the present invention, the base 30 further includes a connector 35. One end of the connector 35 is fixedly connected to the first plate 32, and the other end of the connector 35 is movably connected to the second plate 33. The first plate 32 drives the second plate 33 to move along the mold opening direction.

[0083] In this embodiment, the first plate 32 and the second plate 33 are spaced apart. One end of the connecting member 35 is fixedly connected to the first plate 32, and the other end of the connecting member 35 is movably connected to the second plate 33. After the first plate 32 moves a certain distance along the mold opening direction, the connecting member 35 drives the second plate 33 to move along the mold opening direction. This allows the first plate 32 to drive the inclined shovel 23 to push the slide block 21 to complete the core-pulling action, and then drive the second plate 33 to drive the ejector pin 34 to move along the mold opening direction to eject the mold core. This arrangement ensures the correct mold opening sequence and avoids mold damage caused by ejecting the mold core before the core-pulling action is completed.

[0084] In addition, it should be noted that the connection of one end of the connector 35 to the first plate 32 can be a threaded connection, a welded connection, or other effective connection methods.

[0085] The first plate 32 can drive the second plate 33 to move along the mold opening direction by setting a hook, one end of which is fixedly connected to the first plate 32 and the other end is movably connected to the second plate 33. The second plate 33 has a hanging hole. When the first plate 32 moves a certain distance along the mold opening direction, the hook hooks onto the hanging hole, thereby causing the first plate 32 to drive the second plate 33 to move along the mold opening direction. Alternatively, a bolt can be set, one end of which is fixedly connected to the first plate 32 and the other end is movably connected to the second plate 33. The second plate 33 has a through hole, and the bolt passes through the through hole. When the first plate 32 moves a certain distance along the mold opening direction, the head of the bolt abuts against the through hole, thereby causing the first plate 32 to drive the second plate 33 to move along the mold opening direction. Other effective methods may also be used.

[0086] As shown in Figure 4 and Figure 5 As shown, in one embodiment of the two-color mold 1000 of the present invention, the second plate 33 is provided with a countersunk hole 331. The countersunk hole 331 includes a countersunk hole 331a and a through hole 331b arranged coaxially. The diameter of the countersunk hole 331a is larger than the diameter of the through hole 331b. The countersunk hole 331a is located on the side of the through hole 331b away from the mold opening direction and is connected to the through hole 331b. The countersunk hole 331a and the through hole 331b penetrate the second plate 33 along the mold opening direction.

[0087] In this embodiment, the end of the countersunk hole 331a facing the mold opening direction is connected to the end of the through hole 331b facing away from the mold opening direction, thereby enabling the countersunk hole 331a and the through hole 331b to communicate with each other. The countersunk hole 331a penetrates the second plate 33 in the direction away from the mold opening direction, and the through hole 331b penetrates the second plate 33 in the direction facing the mold opening direction. The connecting member 35 is a bolt, the head of the bolt abuts against the end face of the through hole 331b facing the countersunk hole 331a, the head of the bolt can move in the direction away from the through hole 331b, the threaded part of the bolt passes through the through hole 331b and is threadedly connected to the first plate 32. The bolt is inserted into the countersunk hole 331, specifically, the head of the bolt is inserted into the countersunk hole 331a of the countersunk hole 331, the bolt shank is inserted into the through hole 331b of the countersunk hole 331, and the threaded part of the bolt is threadedly connected to the first plate 32. The diameter of the countersunk hole 331a is larger than the diameter of the through hole 331b, and the bolt head is larger than the diameter of the through hole 331b. Therefore, the bolt head can abut against the end face of the through hole 331b facing the countersunk hole 331a, that is, the bolt head abuts against the end face of the through hole 331b away from the mold opening direction. When the first plate 32 moves in the mold opening direction, it drives the bolt to move. The bolt slides in the countersunk hole 331. When the bolt head abuts against the end face of the through hole 331b, the first plate 32 drives the second plate 33 to move in the mold opening direction through the connector 35, thereby creating a stroke difference between the first plate 32 and the second plate 33, thus ensuring the correct mold opening sequence.

[0088] like Figure 4 and Figure 5 As shown, in one embodiment of the two-color mold 1000 of the present invention, the base 30 further includes a base fastening assembly 36, which connects the first plate 32 and the second plate 33 respectively. When the first plate 32 drives the second plate 33 to move along the mold opening direction, the base fastening assembly 36 separates the first plate 32 and the second plate 33.

[0089] In this embodiment, the base assembly 36 can separate the first plate 32 and the second plate 33 by setting an elastic slider on the second plate 33, setting an abutment block on the first plate 32, and setting a hook on the base 30 to hook the elastic slider. When the abutment block moves with the first plate 32 along the mold opening direction, the hook hooks the elastic slider, making the second plate 33 stationary, thereby separating the first plate 32 and the second plate 33. As the abutment block continues to move with the first plate 32 along the mold opening direction, the abutment block compresses the elastic slider, causing the hook to disengage, thereby the first plate 32 drives the second plate 33 to move along the mold opening direction, while maintaining the gap between the first plate 32 and the second plate 33. Alternatively, the base assembly 36 can be fixedly connected to the first plate 32 and the second plate 33 respectively to maintain the gap between the first plate 32 and the second plate 33. Other effective methods may also be used. By using the base assembly 36 to separate the first plate 32 and the second plate 33, the correct mold opening sequence can be ensured, and mold damage can be avoided by ejecting the mold core before the core pulling action is completed.

[0090] like Figure 4 and Figure 5 As shown, in one embodiment of the two-color mold 1000 of the present invention, the base assembly 36 includes a top base slider 361, a top base spade 363, and a top base hook 365. The top base slider 361 is spring-connected to the second plate 33. The top base spade 363 is fixedly connected to the first plate 32. The top base hook 365 is fixedly connected to the base body 31. When the top base spade 363 moves along the mold opening direction with the first plate 32, the top base hook 365 hooks onto the top base slider 361.

[0091] In this embodiment, a base 30 is fixedly connected to a top base hook 365. A second plate 33 is movably connected to the base 30, and a top base slider 361 is connected to the second plate 33. The top base slider 361 is spring-loaded to the second plate 33 in the direction perpendicular to the mold opening direction. A first plate 32 is also movably connected to the base 30, located on the side of the second plate 33 facing the mold opening direction. A top base spade 363 is fixedly connected to the first plate 32. The top base slider 361 is sandwiched between the top base spade 363 and the top base hook 365. When the top base shovel 363 moves along the mold opening direction with the first plate 32, the top base hook 365 hooks the top base slider 361, causing the top base slider 361 to stop, thereby stopping the second plate 33. As the top base shovel 363 continues to move along the mold opening direction with the first plate 32, it compresses the top base slider 361, causing the top base hook 365 to disengage, thus allowing the first plate 32 to drive the second plate 33 to move along the mold opening direction. The top base hook 365 is hook-shaped; specifically, one surface of the top base hook 365 has a groove, into which the top base slider 361 can be inserted, thereby hooking the top base slider 361. A protrusion is provided on the side of the top base shovel 363 facing the top base slider 361, which abuts against the top base slider 361, causing the top base slider 361 to retract. In this design, as the top base shovel 363 moves along the mold opening direction with the first plate 32, the top base hook 365 hooks the top base slider 361, causing the top base slider 361 to stop, thereby stopping the second plate 33. As the top base shovel 363 continues to move along the mold opening direction with the first plate 32, it compresses the top base slider 361, causing the top base hook 365 to disengage, thus allowing the first plate 32 to drive the second plate 33 to move along the mold opening direction. This design ensures the correct mold opening sequence, avoids mold damage caused by ejecting the mold core before the core-pulling action is completed, and features a simple, stable, and reliable structure.

[0092] Furthermore, it should be noted that the compression of the top base slider 361 by the top base shovel 363 can be achieved by setting an inclined surface on the top base slider 361 and pressing the inclined surface with the top base shovel 363 to cause the top base slider 361 to contract; or by setting a hemispherical surface on the top base slider 361 and pressing the hemispherical surface with the top base shovel 363 to cause the top base slider 361 to contract; or by other effective methods.

[0093] like Figure 4 and Figure 5 As shown, in one embodiment of the two-color mold 1000 of the present invention, the side of the top base slider 361 away from the mold direction is the third inclined surface 3631, and the third inclined surface 3631 is away from the spring. When the top base spatula 363 moves along the mold opening direction with the first plate 32, the top base spatula 363 presses against the third inclined surface 3631, causing the top base slider 361 to contract.

[0094] In this embodiment, the top base slider 361 has two opposing sides, one of which faces the mold opening direction and the other faces away from the mold opening direction. The side facing away from the mold opening direction is cut to form a third inclined surface 3631, which is located on the side of the top base slider 361 away from the spring. The side facing the mold opening direction is abutted by the top base hook 365, thereby keeping the second plate 33 stationary. When the top base shovel 363 moves along the mold opening direction with the first plate 32, the top base shovel 363 slides along the third inclined surface 3631, causing the top base slider 361 to compress the spring, thereby causing the top base slider 361 to retract. At this time, the top base hook 365 no longer abuts the top base slider 361, so that the second plate 33 can be driven by the first plate 32 to move along the mold opening direction, thus ensuring the correct mold opening sequence.

[0095] The present invention also proposes a mold system, which includes an injection molding machine and a two-color mold 1000. The specific structure of the two-color mold 1000 is as described in the above embodiments. Since the mold system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0096] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A two-color mold, comprising a front mold and a rear mold, wherein the direction of the front mold away from the rear mold is the mold opening direction, and a core-pulling direction is defined to intersect the mold opening direction, characterized in that, The rear mold includes a rear mold body, a sliding block, a slanted spade, and a base. The sliding block is slidably connected to the rear mold body. The sliding block reciprocates along the core-pulling direction. The sliding block is provided with a sliding hole. The sliding hole extends along the mold opening direction. The side wall of the end of the sliding hole away from the mold opening direction is inclined toward the core-pulling direction to form a first inclined surface. The sliding block abuts against the side of the molded product. The slanted shovel is movably connected to the rear mold body. The slanted shovel is located on the side of the slide block where the first inclined surface is provided. The slanted shovel reciprocates along the mold opening direction. The base includes a base body, a first plate, a second plate, and an ejector pin. The rear mold body is fixedly connected to the base body. The first plate is movably connected to the base body and can reciprocate along the mold opening direction. The end of the inclined shovel away from the mold opening direction is fixedly connected to the first plate. The first plate has a connecting station for connecting to an injection molding machine to drive the first plate to reciprocate. The second plate is located on the side of the first plate away from the mold opening direction and is spaced apart from the first plate. The second plate is movably connected to the base body and can reciprocate along the mold opening direction. One end of the ejector pin is fixedly connected to the second plate, and the other end of the ejector pin passes through the rear mold body and extends to the side of the molded product for ejecting the molded product. The front mold covers the rear mold body; When the slanted shovel moves along the mold opening direction, it inserts into the sliding hole, abuts against the first inclined surface, and pushes the sliding block to move along the core pulling direction.

2. The two-color mold according to claim 1, wherein The sliding hole includes: A vertical segment, which extends along the mold opening direction; and An inclined segment, one end of which is connected to the end of the vertical segment away from the mold opening direction, and the other end of which passes through the slide block and forms the first inclined surface on the side facing the core pulling direction.

3. The two-color mold according to claim 2, wherein The shovel includes: A long straight section, the long straight section extending away from the mold opening direction; and The inclined section has one end connected to the end of the long straight section facing the mold opening direction, and the other end of the inclined section forms a second inclined surface on the side close to the core pulling direction. The second inclined surface has the same inclination direction as the first inclined surface and is arranged opposite to the first inclined surface.

4. The two-color mold of claim 1, wherein, The rear mold body is provided with a slide rail, which extends along the mold opening direction. The slide rail is located at one end of the sliding hole of the sliding block that is opposite to the mold opening direction and passes through the sliding hole. The inclined shovel is inserted into the slide rail and can reciprocate along the slide rail.

5. The two-color mold according to claim 4, wherein The rear mold also includes a guide block, which is embedded in the rear mold body and located at the end of the slide away from the mold opening direction, and the slide passes through the guide block.

6. The two-color mold of claim 1, wherein, The base also includes a connector, one end of which is fixedly connected to the first plate and the other end of which is movably connected to the second plate. The first plate drives the second plate to move along the mold opening direction.

7. The two-color mold according to claim 6, wherein The second plate is provided with a countersunk hole, which includes a countersunk hole and a through hole arranged coaxially. The diameter of the countersunk hole is larger than the diameter of the through hole. The countersunk hole is located on the side of the through hole away from the mold opening direction and is connected to the through hole. The countersunk hole and the through hole penetrate the second plate along the mold opening direction.

8. The two-color mold of claim 1, wherein, The base also includes a base fastening assembly, which connects the first plate and the second plate respectively. When the first plate drives the second plate to move along the mold opening direction, the base fastening assembly separates the first plate and the second plate.

9. The two-color mold according to claim 8, wherein The clasp assembly includes: A top base slider, wherein the top base slider is spring-connected to the second plate; Top base shovel, the top base shovel being fixedly connected to the first plate; and Top base hook, which is fixedly connected to the base body; When the top base shovel moves along the mold opening direction with the first plate, the top base hook hooks onto the top base slider.

10. The two-color mold according to claim 9, wherein The side of the top base slider away from the mold opening direction is a third inclined surface, and the third inclined surface is away from the spring; When the top base shovel moves along the mold opening direction with the first plate, the top base shovel presses against the third inclined surface to cause the top base slider to contract.

11. A mold system characterized by, It includes an injection molding machine and a two-color mold as described in any one of claims 1 to 10, wherein the injection molding machine is connected to the two-color mold.

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