Dual-shot mold

Abstract

The utility model belongs to injection molding technical field discloses a kind of double injection mould, in the double injection mould, male die has mould seat and slider, mould seat has male forming part and mating hole;Slider is slidably arranged in mould seat, to approach or away from male forming part;When slider approaches male forming part, first female die approaches male forming part and encloses first mould cavity, second female die approaches male forming part and encloses second mould cavity;PUSH-PUSH structure is arranged in slider, when first female die approaches male forming part, the input end of PUSH-PUSH structure is pushed, so that the output end of PUSH-PUSH structure is inserted in mating hole, when first female die is away from male forming part and second female die approaches male forming part, the output end of PUSH-PUSH structure remains in mating hole, when second female die is away from male forming part, the output end of PUSH-PUSH structure is removed from mating hole.The above-mentioned setting ensures the stability between slider and mould seat, improves the yield of product.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, and in particular to a double-shot mold. Background Technology

[0002] A two-color mold consists of one male mold and two female molds (for ease of description, the two female molds can be referred to as the first-shot female mold and the second-shot female mold). The male mold includes a mold base and a slider that slides on the mold base. The mold base, slider, and first-shot female mold form the first mold cavity, and the mold base, slider, and second-shot female mold form the second mold cavity. During injection molding, the male mold first mates with the first-shot female mold to complete the first injection. Then, the male mold separates from the first-shot female mold and mates with the second-shot female mold to complete the second injection. Some products have holes or protrusions, so the slider needs to be provided with protrusions or recesses. After the first injection, the protrusion is located in the hole or the protrusion is located in the recess. During the injection molding process, it is necessary to ensure the relative stability of the slider and the mold base. Related technologies usually use a structure with a spring and ball joint for locking. The slider has a mounting groove, the spring is located in the mounting groove, and the ball is connected to the spring. Part of the ball is located in the mounting groove, and part of it is located in the limiting groove of the mold base. However, due to the limited elasticity of the spring, it is easy for the locking to fail during the mold opening process of the first injection female mold, resulting in relative movement between the slider and the mold base. When the second injection female mold approaches the male mold, the second mold cavity deforms, which leads to injection failure and increases the defect rate of the product.

[0003] Therefore, it is urgent to study a double-shot mold to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a double-shot mold to solve the problem of increased product defect rate caused by the movement of the slider relative to the mold base in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Double-shot mold, including:

[0007] A male mold has a mold base and a slider. The mold base has a male forming part and a mating hole. The slider is slidably disposed on the mold base to move closer to or further away from the male forming part.

[0008] First female mold and second female mold, when the slider approaches the male forming part, the first female mold approaches the male forming part and forms a first mold cavity, and the second female mold approaches the male forming part and forms a second mold cavity;

[0009] A PUSH-PUSH structure is provided on the slider. When the first female mold approaches the male forming part, it pushes against the input end of the PUSH-PUSH structure and inserts the output end of the PUSH-PUSH structure into the mating hole. When the first female mold moves away from the male forming part and the second female mold approaches the male forming part, the output end of the PUSH-PUSH structure remains in the mating hole. When the second female mold moves away from the male forming part, the output end of the PUSH-PUSH structure moves out of the mating hole.

[0010] As an optional technical solution for a double-shot mold, the male mold includes a sliding elastic element, which is disposed between the slider and the mold base, and applies an elastic force to the slider to drive the slider away from the male forming part.

[0011] As an optional technical solution for a double-shot mold, the sliding elastic element is a spring, the slider has a sliding groove, the spring is located in the sliding groove, one end of the spring abuts against the bottom of the sliding groove, and the other end abuts against the mold base.

[0012] As an optional technical solution for a double-shot mold, the male mold includes a sliding limiting member disposed on the mold base. When the slider moves away from the male forming part, it abuts against the sliding limiting member to limit its further movement away from the male forming part.

[0013] As an optional technical solution for a double-shot mold, the sliding limiting component is a limiting screw, the mold base has a limiting screw hole, the extension direction of the limiting screw hole is perpendicular to the sliding direction of the slider, the limiting screw is screwed into the limiting screw hole, and part of it is located outside the limiting screw hole.

[0014] As an optional technical solution for a double-shot mold, the first female mold includes a first mold body and a first pusher member disposed on the first mold body. The slider has a sliding body and a pusher fitting part disposed on the sliding body and cooperating with the first pusher member. During the process of the first female mold approaching the mold base, the first pusher member first cooperates with the pusher fitting part to push the slider closer to the male forming part. The first mold body then cooperates with the input end of the PUSH-PUSH structure to drive the output end of the PUSH-PUSH structure to be inserted into the mating hole.

[0015] As an optional technical solution for a double-shot mold, the first pusher includes a pusher body connected to the first mold body and a pusher portion disposed on the pusher body. The pusher portion is located at one end of the first pusher facing the mold base and is in line contact or surface contact with the pusher mating portion.

[0016] As an optional technical solution for a double-shot mold, the pushing mating part includes a first sliding surface and a second sliding surface disposed at one end of the sliding body. The first sliding surface is inclined towards the male forming part along the direction close to the first female mold. The mold base has a sliding groove, and the slider is slidably disposed in the sliding groove. The pushing body has a pressing inclined surface parallel to the first sliding surface. The pressing inclined surface presses against the first sliding surface so that the sliding body abuts against the bottom of the sliding groove.

[0017] As an optional technical solution for a double-shot mold, the second female mold includes a second mold body and a deflector disposed on the second mold body. The deflector is inclined away from the male forming part in a direction close to the mold base. The slider has a deflection channel that cooperates with the deflector. A deflector fitting is disposed on the slider and partially located within the deflection channel. The deflector located within the deflection channel slides in cooperation with the deflector fitting, so that when the deflector moves away from the male mold, it drives the deflector fitting away from the male forming part.

[0018] As an optional technical solution for a double-shot mold, the actuating component includes an actuating pin and an actuating elastic element. The slider has an actuating hole communicating with the actuating channel. The extending direction of the actuating hole is perpendicular to the sliding direction of the slider. The actuating pin is located in the actuating hole. The actuating pin moves relative to the slider to retract into the actuating hole or partially into the actuating channel. The actuating elastic element applies an elastic force to the actuating pin to move it into the actuating channel; and / or,

[0019] The actuating member is inclined away from the male forming part in the direction close to the mold base. The end of the actuating member close to the mold base has a first actuating surface. The first actuating surface is away from the actuating pin in the direction close to the mold base. The side of the actuating member away from the male forming part forms a second actuating surface.

[0020] The embodiments of this utility model have at least the following beneficial effects:

[0021] This utility model provides a double-shot mold, which includes a male mold, a first female mold, a second female mold, and a push-pull structure. The male mold has a mold base and a slider. The mold base has a male forming part and a mating hole. The slider is slidably disposed on the mold base to move closer to or away from the male forming part. When the slider moves closer to the male forming part, the first female mold moves closer to the male forming part and forms a first mold cavity, and the second female mold moves closer to the male forming part and forms a second mold cavity. The push-pull structure is disposed on the slider. When the first female mold moves closer to the male forming part, it pushes against the input end of the push-pull structure and inserts the output end of the push-pull structure into the mating hole. When the first female mold moves away from the male forming part and the second female mold moves closer to the male forming part, the output end of the push-pull structure remains in the mating hole. When the second female mold moves away from the male forming part, the output end of the push-pull structure moves out of the mating hole. The above-described design cleverly utilizes the movement of the first female mold approaching and moving away from the male mold to drive the PUSH-PUSH structure, thereby locking the slider. Conversely, the movement of the second female mold approaching and moving away from the male mold drives the PUSH-PUSH structure, thereby unlocking the slider. This ensures that when the first female mold approaches the mold base, the slider is locked. Subsequently, during the separation of the first female mold from the mold base and the movement of the mold base to its mating position with the second female mold, the slider and mold base remain relatively fixed, thus guaranteeing the shape of the second mold cavity and preventing deformation of the product during the second injection molding, thereby improving product yield. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the double-shot mold in an embodiment of this utility model, with the mounting base omitted;

[0023] Figure 2 yes Figure 1 Cross-sectional view along the AA direction;

[0024] Figure 3 yes Figure 2 Enlarged view of point J in the middle;

[0025] Figure 4 yes Figure 1 Cross-sectional view along the BB direction;

[0026] Figure 5 yes Figure 4 Enlarged view at point K;

[0027] Figure 6 This is a schematic diagram of the structure of the public mold in an embodiment of this utility model;

[0028] Figure 7 This is a schematic diagram of the slider and PUSH-PUSH structure in an embodiment of this utility model;

[0029] Figure 8This is a schematic diagram of the structure of the second mold body and the actuating component in an embodiment of this utility model;

[0030] Figure 9 This is a schematic diagram of the structure of the two male molds and the rotating component in an embodiment of this utility model;

[0031] Figure 10 This is a schematic diagram of the structure of the double-shot mold in an embodiment of this utility model;

[0032] Figure 11 This is the explosive intent of the PUSH-PUSH structure in the embodiments of this utility model.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1000, Product 1; 2000, Product 2;

[0035] 100. Male mold; 110. Mold base; 111. Male forming part; 112. Mating hole; 113. Sliding groove; 120. Slider; 121. Sliding body; 122. Sliding part; 123. Protrusion; 124. First sliding surface; 125. Second sliding surface; 126. Sliding groove; 127. Actuating channel; 128. Actuating pin; 129. Actuating seat; 130. Mold ejection part; 140. Support seat; 150. Push plate; 160. Sliding mating part; 170. Sliding elastic part; 180. Sliding limiting part;

[0036] 200, First female mold; 210, First mold body; 220, First pusher; 221, Pusher body; 222, Pusher part; 223, Pressing slope;

[0037] 300, Second female mold; 310, Second mold body; 320, Actuating component; 321, First actuating surface; 322, Second actuating surface; 330, Second pushing component;

[0038] 400. Push-Push structure; 410. Fixing bracket; 411. Mounting hole; 412. Slide rail; 413. Ramp; 420. Pressing element; 421. Drive gear; 422. First slide groove; 430. Locking element; 431. Driven gear; 432. Second slide groove; 440. Connecting element; 450. Thrust elastic element;

[0039] 510. Rotating component; 520. Mounting base. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] A two-color mold has one male mold and two female molds (for ease of description, the two female molds can be referred to as the first-shot female mold and the second-shot female mold). The male mold includes a mold base and a slider that slides on the mold base. The mold base, slider, and first-shot female mold form the first mold cavity, and the mold base, slider, and second-shot female mold form the second mold cavity. During injection molding, the male mold first mates with the first-shot female mold to complete the first injection. Then, the male mold separates from the first-shot female mold and mates with the second-shot female mold to complete the second injection. Some products have holes or protrusions, so the slider needs to be provided with protrusions or recesses. After the first injection, the protrusion is located in the hole or the protrusion is located in the recess. During the injection molding process, it is necessary to ensure the relative stability of the slider and the mold base. Related technologies usually adopt a structure with a spring and ball joint. The slider has a mounting groove, the spring is located in the mounting groove, and the ball is connected to the spring. Part of the ball is located in the mounting groove, and part of it is located in the limiting groove of the mold base. However, due to the limited elasticity of the spring, vibrations can easily occur during the mold opening process, or the ball bearings may shift due to the weight of the slider itself. This causes relative movement between the slider and the mold base, resulting in deformation of the second mold cavity when the female mold approaches the male mold, leading to injection failure and increasing the product defect rate. Therefore, this invention provides a double-shot mold to solve the above problems.

[0044] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0045] like Figures 1 to 11 As shown, this utility model provides a double-shot mold, which includes a male mold 100, a first female mold 200, a second female mold 300, and a push-push structure 400. The male mold 100 has a mold base 110 and a slider 120. The mold base 110 has a male forming part 111 and a mating hole 112. The slider 120 is slidably disposed on the mold base 110 to approach or move away from the male forming part 111. The slider 120 has a protrusion 123 or a recess. When the slider 120 approaches the male forming part 111, the first female mold 200 approaches the male forming part 111 and forms a first mold cavity, and the second female mold 300 approaches the male forming part 111 and forms a second mold cavity. At least one protrusion 123 is present. Located in the first mold cavity, or at least one recessed portion communicating with the first mold cavity; the PUSH-PUSH structure 400 is provided on the slider 120. When the first female mold 200 is close to the male forming part 111, it pushes against the input end of the PUSH-PUSH structure 400 and inserts the output end of the PUSH-PUSH structure 400 into the mating hole 112. When the first female mold 200 moves away from the male forming part 111 and the second female mold 300 moves close to the male forming part 111, the output end of the PUSH-PUSH structure 400 remains in the mating hole 112. When the second female mold 300 moves away from the male forming part 111, the output end of the PUSH-PUSH structure 400 moves out of the mating hole 112.

[0046] The extension direction of the mating hole 112 is perpendicular to the sliding direction of the slider 120.

[0047] The above-described configuration cleverly utilizes the movement of the first female mold 200 approaching and moving away from the mold base 110 to drive the PUSH-PUSH structure 400, thereby locking the slider 120. Conversely, the movement of the second female mold 300 approaching and moving away from the mold base 110 drives the PUSH-PUSH structure 400, thereby unlocking the slider 120. This ensures that when the first female mold 200 approaches the mold base 110, the slider 120 is locked. Subsequently, during the separation of the first female mold 200 from the mold base 110 and the movement of the mold base 110 to a position where it engages with the second female mold 300, the slider 120 remains relatively fixed to the mold base 110. This guarantees the integrity of the product formed by the second injection molding process, prevents deformation, and improves product yield.

[0048] When the second female mold 300 and the male mold 100 separate, the slider 120 needs to move away from the male forming part 111. For this purpose, the male mold 100 includes a sliding elastic element 170, which is located between the slider 120 and the mold base 110, and applies an elastic force to the slider 120 to move it away from the male forming part 111. When the output end of the PUSH-PUSH structure 400 is withdrawn from the mating hole 112, the sliding elastic element 170 applies an elastic force to the slider 120 to move it away from the male forming part 111. The sliding elastic element 170 is a spring, and the slider 120 has a sliding groove 126. The spring is located within the sliding groove 126, with one end abutting the bottom of the groove 126 and the other end abutting the mold base 110. When the protrusion 123 of the slider 120 abuts against the male forming part 111, the sliding elastic member 170 retracts into the sliding groove 126 to prevent gaps from appearing between the protrusion 123 of the slider 120 and the male forming part 111.

[0049] In some embodiments, the male mold 100 includes a sliding limit member 180 disposed on the mold base 110. When the slider 120 moves away from the male forming part 111, it abuts against the sliding limit member 180 to limit its further movement away from the male forming part 111, thereby limiting the maximum distance the slider 120 can move and preventing the slider 120 from separating from the mold base 110. Regarding the movement distance of the slider 120, it is only necessary to ensure that the protrusion 123 is pulled out of the hole in the product or that the protrusion and recess of the product separate.

[0050] Specifically, the sliding limit member 180 is a limit screw, the mold base 110 has a limit screw hole, the extension direction of the limit screw hole is perpendicular to the sliding direction of the slider 120, the limit screw is screwed into the limit screw hole, and part of it is located outside the limit screw hole.

[0051] The first female mold 200 includes a first mold body 210 and a first pusher 220 disposed on the first mold body 210. The slider 120 has a sliding body 121 and a pusher engagement portion disposed on the sliding body 121 and cooperating with the first pusher 220. During the process of the first female mold 200 approaching the mold base 110, the first pusher 220 first engages with the pusher engagement portion to push the slider 120 closer to the male forming part 111. The first mold body 210 then engages with the input end of the PUSH-PUSH structure 400 to drive the output end of the PUSH-PUSH structure 400 into the mating hole 112. The above arrangement allows the first female mold 200 to complete the driving of the slider 120 and the PUSH-PUSH structure 400 in one stroke when approaching the mold base 110. The design is ingenious, reduces operation steps, and improves operation efficiency. In addition, it simplifies the operation procedure and reduces programming difficulty.

[0052] Specifically, the abutting engagement includes a first sliding surface 124 and a second sliding surface 125 located at one end of the sliding body 121. The first sliding surface 124 is inclined towards the male forming part 111 along the direction close to the first female mold 200. The second sliding surface 125 is connected to the first sliding surface 124 and is perpendicular to the sliding direction of the slider 120. When the first female mold 200 approaches the male forming part 111, the first abutting member 220 engages with the first sliding surface 124 and the second sliding surface 125 in sequence, so that the slider 120 first approaches the male forming part 111 and then remains stationary. When the slider 120 remains stationary, the output end of the PUSH-PUSH structure 400 is directly opposite the mating hole 112. Based on this, the first female mold 200 continues to approach the male forming part 111 and abuts the input end of the PUSH-PUSH structure 400, causing the output end of the PUSH-PUSH structure 400 to be inserted into the mating hole 112. The sliding engagement effectively improves the reliability of the transmission and has a simple structure, making it easy to produce and assemble.

[0053] The first pushing member 220 includes a pushing body 221 connected to the first mold body 210 and a pushing portion 222 disposed on the pushing body 221. The pushing portion 222 is located at the end of the first pushing member 220 facing the mold base 110 and is in line contact or surface contact with the pushing mating part. The end of the pushing portion 222 near the mold base 110 is an arc-shaped surface with a guiding function.

[0054] The mold base 110 has a sliding groove 113, and the slider 120 is slidably disposed in the sliding groove 113. The push body 221 has a pressing inclined surface 223 parallel to the first sliding surface 124. The first mold body 210 cooperates with the input end of the PUSH-PUSH structure 400, so that the output end of the PUSH-PUSH structure 400 is inserted into the mating hole 112, while the pressing inclined surface 223 presses against the first sliding surface 124, so that the sliding body 121 abuts against the bottom of the sliding groove 113. This structure ensures that the slider 120 can abut against the bottom of the sliding groove 113 without backing up, thereby ensuring the horizontal positional accuracy of the slider 120 and ensuring the horizontal positional accuracy of the holes in the workpiece. In this embodiment, the horizontal direction can be understood as the opening and closing direction of the first female mold 200 towards or away from the male mold 100. The horizontal direction is perpendicular to Figure 9 The up and down directions in the middle.

[0055] Similarly, the second female mold 300 has a second pusher 330 with the same structure as the first pusher 220. Of course, in other embodiments, when the second product 2000 does not involve holes, the second pusher 330 may not be provided, because the position of the slider 120 does not need to change when the male mold 100 and the second female mold 300 are engaged.

[0056] The slider 120 has a sliding body 121 and two sliding portions 122 disposed on the sliding body 121. The two sliding portions 122 are arranged at intervals on both sides of the sliding body 121 along a limiting direction perpendicular to the sliding direction of the slider 120. Two sliding mating parts 160 are disposed on the mold base 110. The sliding mating parts 160 have pressing surfaces, and the two pressing surfaces correspond one-to-one with the two sliding portions 122, pressing against the side of the sliding portion 122 away from the bottom of the sliding groove 113, so as to prevent the slider 120 from disengaging from the mold base 110. The two sliding mating parts 160 are disposed on both sides of the sliding body 121 along the limiting direction.

[0057] The second female mold 300 includes a second mold body 310 and a toggle member 320 disposed on the second mold body 310. The toggle member 320 is inclined away from the male forming part 111 in a direction close to the mold base 110. The slider 120 has a toggle channel 127 that cooperates with the toggle member 320. The toggle mating member is disposed on the slider 120 and is partially located in the toggle channel 127. The toggle member 320 located in the toggle channel 127 slides and cooperates with the toggle mating member so that when the toggle member 320 moves away from the male mold 100, it drives the toggle mating member away from the male forming part 111, thereby driving the slider 120 away from the male forming part 111, so that the protrusion 123 is pulled out from the hole, so that the finished product can be pushed out of the male mold 100 in the future.

[0058] The maximum size of the output end of the PUSH-PUSH structure 400 inserted into the mating hole 112 is the first size. When the distance between the second female mold 300 and the male mold 100 is the second size during the process of the second female mold 300 moving away from the male mold 100, the actuating member 320 abuts against the actuating mating member. The first size is less than or equal to the second size, so that after the output end of the PUSH-PUSH structure 400 is pulled out of the mating hole 112, the sliding block 120 will be driven away from the male forming part 111 through the cooperation of the actuating member 320 and the actuating mating member.

[0059] The actuating engagement includes an actuating pin 128 and an actuating elastic member. The slider 120 has an actuating hole communicating with the actuating channel 127. The extension direction of the actuating hole is perpendicular to the sliding direction of the slider 120. The actuating pin 128 is located in the actuating hole. The actuating pin 128 moves relative to the slider 120 to retract into the actuating hole or be partially located in the actuating channel 127. The actuating elastic member applies an elastic force to the actuating pin 128 to move it into the actuating channel 127. The actuating member 320 is inclined away from the male forming part 111 in the direction close to the mold base 110. The end of the actuating member 320 near the mold base 110 has a first actuating surface 321. The first actuating surface 321 is away from the actuating pin 128 in the direction close to the mold base 110. A second actuating surface 322 is formed on the side of the actuating member 320 away from the male forming part 111. The second actuating surface 322 is parallel to the extension direction of the actuating member 320, so that as the second female mold 300 approaches the male mold 100, the actuating pin 128 is squeezed into the actuating hole by the first actuating surface 321. As the second female mold 300 continues to move downward, part of the actuating member 320 passes over the actuating pin 128. Under the action of the actuating elastic member, the actuating pin 128 extends into the actuating channel 127. When the second female mold 300 moves away from the male mold 100, the second actuating surface 322, which is parallel to the axis of the actuating pin 128, abuts against the actuating pin 128 and drives the actuating pin 128 away from the male forming part 111, thereby driving the slider 120 away from the male forming part 111.

[0060] To improve the stability of the slider 120's movement, in some embodiments, two actuating components are installed on the slider 120. Two actuating pins 128 are spaced apart and brought closer together under the action of two actuating elastic elements. Each actuating component 320 has two first actuating surfaces 321, each corresponding to one of the two actuating pins 128, and their inclination directions are opposite. The actuating components also include an actuating seat 129, which is fixedly connected to the slider 120 and seals the actuating hole. The actuating elastic element is a spring, located within the actuating hole, with one end abutting against the actuating pin 128 and the other end abutting against the actuating seat 129. This arrangement helps save space and provides accommodating space for the spring, facilitating increased extension and contraction.

[0061] In some embodiments, the male mold 100 moves to two injection positions to correspond to the first female mold 200 and the second female mold 300, respectively. In other embodiments, the position of the male mold 100 remains unchanged, while the first female mold 200 and the second female mold 300 move to mate with the male mold 100, respectively.

[0062] The double-shot mold also includes a rotating component 510. A male mold 100 is disposed on the rotating component 510 and rotates synchronously with it, passing through two injection positions. The sliding direction of the slider 120 is perpendicular to the axis of the rotating component 510. The double-shot mold has two male molds 100, which are respectively disposed on both sides of the axis of the rotating component 510 and rotate synchronously with it. When one male mold 100 corresponds to the first female mold 200, the other male mold 100 corresponds to the second female mold 300, as shown below. Figure 9 and Figure 10 As shown.

[0063] To facilitate the delivery of the finished product, in some embodiments, combined with Figure 2 As shown, the male mold 100 also includes a demolding member 130. The mold base 110 has a demolding hole communicating with the first mold cavity. The demolding member 130 passes through the demolding hole and moves between the forming position and the demolding position. When moving from the forming position to the demolding position, one end of the demolding member 130 moves into the interior of the first mold cavity to eject the finished product. Specifically, the male mold 100 includes a support base 140 and a push plate 150. The mold base 110 is disposed on the support base 140, and the push plate 150 is slidably disposed on the support base 140. The other end of the demolding member 130 is connected to the push plate 150. The support base 140 has a demolding hole. The demolding rod passes through the demolding hole and pushes against the push plate 150, thereby driving one end of the demolding member 130 into the first mold cavity.

[0064] In use, one male mold 100 mates with the first female mold 200 to complete the first injection molding and form the first product 1000. Then, it moves to a position to mate with the second female mold 300 and completes the second injection molding to form the second product 2000, which combines with the first product 1000 to form the finished product. At this time, the other male mold 100 mates with the first female mold 200 to complete the first injection molding and form the first product 1000. Finally, one male mold 100 ejects the finished product through the ejection part 130 and rotates to a position corresponding to the first female mold 200. The other male mold 100 rotates to a position corresponding to the second female mold 300, and this cycle repeats to produce several finished products. The first female mold 200 and the second female mold 300 are mounted on a mounting base 520. The mounting base 520 can move closer to or further away from the rotating part 510 to drive the first female mold 200 and the second female mold 300 to move closer to or further away from the two male molds 100 simultaneously. The mounting base 520 can be driven by a pneumatic cylinder or a hydraulic cylinder.

[0065] The PUSH-PUSH structure 400 is similar to the automatic telescopic locking mechanism of an automatic ballpoint pen. The PUSH-PUSH structure 400 includes a fixing frame 410, a pressing member 420, a locking member 430, a plug-in member 440, and a thrust elastic member 450. The fixing frame 410 has mounting holes 411, and the sidewalls of the mounting holes 411 have several slide rails 412. One end of each slide rail 412 has a ramp 413. The outer periphery of the pressing member 420 has several parts that correspond one-to-one with the slide rails 412. The first sliding groove 422 is connected. The pressing member 420 has a driving tooth 421 at the end facing the locking member 430, and the locking member 430 has a driven tooth 431 at the end facing the pressing member 420. The outer periphery of the locking member 430 has several second sliding grooves 432 that correspond one-to-one with the slide rail 412. The plug-in member 440 is located at the end of the locking member 430 away from the pressing member 420. The thrust elastic member 450 applies an elastic force to the plug-in member 440 to push the plug-in member 440 closer to the locking member 430. The pressing member 420 forms the input end of the PUSH-PUSH structure 400, and the plug-in member 440 forms the output end of the PUSH-PUSH structure 400. When the first female mold 200 is close to the male molding part 111, the connector 440 is inserted into the mating hole 112. When the first female mold 200 is away from the male molding part 111 and the second female mold 300 is close to the male molding part 111, the connector 440 remains in the mating hole 112. When the second female mold 300 is away from the male molding part 111, the connector 440 is removed from the mating hole 112.

[0066] Specifically, in the initial state, the connector 440 is located outside the mating hole 112; in the plugged state, the connector 440 is located inside the mating hole 112. In use, in the initial state, pressing down on the pressing member 420 drives the locking member 430 and the connector 440 to move downwards together. After moving approximately 4.5mm, the locking member 430 separates from the slide rail 412. Continuing to press down on the pressing member 420, under the action of the thrust elastic member 450 and the ramp 413, the locking member 430 rotates counterclockwise by 10° and floats upwards by 0.23mm. At this time, the top of the pressing member 420 and the fixing bracket 410... The top of the locking member 430 is flush with the sliding rail 412, and the driven tooth 431 and part of the ramp 413 of the locking member 430 overlap. When the pressing member 420 is released, under the action of the thrust elastic member 450 and the ramp 413, the locking member 430 rotates counterclockwise by 35° and floats up by 1.12mm. The driven tooth 431 of the locking member 430 and the ramp 413 at the end of the slide rail 412 engage. The plug-in member 440 and the locking member 430 can no longer float up. At this time, the plug-in state is formed.

[0067] When the pressing member 420 is pressed again, the locking member 430 and the plug member 440 move downwards together by about 1.5mm. The driven tooth 431 of the locking member 430 and the slide rail 412 disengage. Under the action of the driving tooth 421 and the driven tooth 431 and the action of the thrust elastic member 450, the locking member 430 rotates 45° and floats up 0.15mm. At this time, the second slide groove 432 and the slide rail 412 overlap. When the pressing member 420 is released, under the action of the thrust elastic member 450, the plug member 440 and the locking member 430 float up 4.8mm and are pulled out from the mating hole 112. At this time, the initial state is formed.

[0068] In other embodiments, the PUSH-PUSH structure 400 may also adopt other known structures in the prior art, as long as it can achieve the first press and return, so that the output end of the PUSH-PUSH structure 400 can extend, and the second press and return, so that the output end of the PUSH-PUSH structure 400 can retract, and is not limited to the above description of the PUSH-PUSH structure 400.

[0069] This embodiment also provides an injection molding method, applied to any of the above-mentioned two-shot molds, the injection molding method comprising the following steps:

[0070] The male mold 100 moves to the position corresponding to the first female mold 200.

[0071] The first female mold 200 is close to the male forming part 111 of the male mold 100 and pushes the output end of the PUSH-PUSH structure 400 into the mating hole 112 of the mold base 110.

[0072] The first raw material is injected into the first mold cavity to complete the first injection molding process.

[0073] After the first female mold 200 moves away from the male forming part 111, the second female mold 300 moves closer to the male forming part 111. During this process, the output end of the PUSH-PUSH structure 400 remains in the mating hole 112.

[0074] The second raw material is injected into the second mold cavity to complete the second injection molding process.

[0075] When the second female mold 300 moves away from the male forming part 111, the output end of the PUSH-PUSH structure 400 moves out of the mating hole 112.

[0076] In some embodiments, the first raw material and the second raw material are the same material but different colors. In some embodiments, the first raw material and the second raw material are different materials but the same color. In some embodiments, the first raw material and the second raw material are different materials and different colors.

[0077] The above-described design cleverly utilizes the movement of the first female mold 200 towards and away from the male mold 100 to drive the PUSH-PUSH structure 400, thereby locking the slider 120. Conversely, the movement of the second female mold 300 towards and away from the male mold 100 drives the PUSH-PUSH structure 400, thereby unlocking the slider 120. After locking, when the first female mold 200 separates from the mold base 110, and the mold base 110 moves to a position to engage with the second female mold 300, the slider 120 will not experience relative displacement with respect to the mold base 110. This ensures the integrity of the product formed in the first injection molding process and prevents deformation. Simultaneously, when the second female mold 300 engages with the male mold 100, the position of the slider 120 remains unchanged, preventing damage to the product formed in the first injection molding process, thus ensuring product integrity and improving yield.

[0078] During the process of the first female mold 200 approaching the male mold 100, the slider 120 is first driven to approach the male forming part 111. When the output end of the PUSH-PUSH structure 400 is aligned with the mating hole 112, the PUSH-PUSH structure 400 is then driven so that the output end of the PUSH-PUSH structure 400 is inserted into the mating hole 112.

[0079] When the output end of the PUSH-PUSH structure 400 is located in the mating hole 112, and the top of the pressing member 420 and the top of the fixing bracket 410 are flush, the pressing bevel 223 presses against the first sliding surface 124, and then the first injection molding is performed.

[0080] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A two-shot mold characterized in that, include: A male mold, wherein the male mold has a mold base and a slider, and the mold base has a male forming part and a mating hole; The slider is slidably disposed on the mold base to move closer to or further away from the male forming part; First female mold and second female mold, when the slider approaches the male forming part, the first female mold approaches the male forming part and forms a first mold cavity, and the second female mold approaches the male forming part and forms a second mold cavity; A PUSH-PUSH structure is provided on the slider. When the first female mold approaches the male forming part, it pushes against the input end of the PUSH-PUSH structure and inserts the output end of the PUSH-PUSH structure into the mating hole. When the first female mold moves away from the male forming part and the second female mold approaches the male forming part, the output end of the PUSH-PUSH structure remains in the mating hole. When the second female mold moves away from the male forming part, the output end of the PUSH-PUSH structure moves out of the mating hole.

2. The bi-mold according to claim 1, wherein, The male mold includes a sliding elastic element, which is disposed between the slider and the mold base, and applies an elastic force to the slider to drive the slider away from the male forming part.

3. The bi-mold according to claim 2, wherein, The sliding elastic element is a spring, the slider has a sliding groove, the spring is located in the sliding groove, one end of the spring abuts against the bottom of the sliding groove, and the other end abuts against the mold base.

4. The bi-mold of claim 1, wherein, The male mold includes a sliding limiting member disposed on the mold base. When the slider moves away from the male forming part, it abuts against the sliding limiting member to limit its further movement away from the male forming part.

5. The bi-mold of claim 4, wherein, The sliding limiting component is a limiting screw, the mold base has a limiting screw hole, the extension direction of the limiting screw hole is perpendicular to the sliding direction of the slider, the limiting screw is screwed into the limiting screw hole, and part of it is located outside the limiting screw hole.

6. The double-shot mold according to any one of claims 1-5, characterized in that, The first female mold includes a first mold body and a first pusher member disposed on the first mold body. The slider has a sliding body and a pusher engagement part disposed on the sliding body and cooperating with the first pusher member. During the process of the first female mold approaching the mold base, the first pusher member first cooperates with the pusher engagement part to push the slider closer to the male forming part. The first mold body then cooperates with the input end of the PUSH-PUSH structure to drive the output end of the PUSH-PUSH structure to be inserted into the mating hole.

7. The bi-mold of claim 6, wherein, The first pushing member includes a pushing body connected to the first mold body and a pushing part disposed on the pushing body. The pushing part is located at one end of the first pushing member facing the mold base and is in line contact or surface contact with the pushing mating part.

8. The bi-mold of claim 7, wherein, The pushing and mating part includes a first sliding surface and a second sliding surface disposed at one end of the sliding body. The first sliding surface is inclined towards the male forming part along the direction close to the first female mold. The mold base has a sliding groove. The slider is slidably disposed in the sliding groove. The pushing body has a pressing inclined surface parallel to the first sliding surface. The pressing inclined surface presses against the first sliding surface so that the sliding body abuts against the bottom of the sliding groove.

9. The bi-mold according to any one of claims 1-5, wherein, The second female mold includes a second mold body and a toggle member disposed on the second mold body. The toggle member is inclined away from the male forming part in a direction close to the mold base. The slider has a toggle channel that cooperates with the toggle member. A toggle mating member is disposed on the slider and is partially located in the toggle channel. The toggle member located in the toggle channel slides in cooperation with the toggle mating member so that when the toggle member moves away from the male mold, it drives the toggle mating member away from the male forming part.

10. The bi-mold of claim 9, wherein, The actuating engagement component includes an actuating pin and an actuating elastic element. The slider has an actuating hole communicating with the actuating channel. The extending direction of the actuating hole is perpendicular to the sliding direction of the slider. The actuating pin is located in the actuating hole. The actuating pin moves relative to the slider to retract into the actuating hole or partially into the actuating channel. The actuating elastic element applies an elastic force to the actuating pin to move it into the actuating channel; and / or, The actuating member is inclined away from the male forming part in the direction close to the mold base. The end of the actuating member close to the mold base has a first actuating surface. The first actuating surface is away from the actuating pin in the direction close to the mold base. The side of the actuating member away from the male forming part forms a second actuating surface.

Images