A mold core-pulling structure with anti-retraction function

Abstract

The application discloses a mold core-pulling structure with a retreat-preventing function, which comprises a mold body, a side forming assembly and a limiting piece, the mold body comprises an upper mold and a lower mold, the lower mold comprises a mold base and a mold body, the mold body is floatingly installed at the top end of the mold base and is matched with the upper mold, the side forming assembly comprises a core block and an oil cylinder, the oil cylinder is installed at the side of the upper mold, the core block is slidingly installed in the upper mold and is connected with the piston end of the oil cylinder, and the limiting piece is fixedly installed at the bottom end of the mold base. The application has the beneficial effects that: by arranging the limiting piece and the floatingly installed mold body in the mold, the limiting piece can penetrate through the mold body and abut against the core block when the mold is closed, so that the core block is in a locked and limited state, retreat of the side forming assembly during mold closing can be prevented, and the quality stability of products during injection molding is ensured.

Description

Technical Field

[0001] This application relates to the field of mold technology, and in particular to a mold core-pulling structure with anti-retraction function. Background Technology

[0002] like Figure 1 The diagram shows the structure of an injection-molded product with a long core block on its side. Therefore, a hydraulic cylinder is required for demolding. However, during injection molding, the cylinder needs to continuously provide pressure. Prolonged use in a high-pressure environment can lead to aging and leakage of the cylinder seals, causing the core block to retract during injection, affecting product quality. To address this issue, a mold core-pulling structure with anti-retraction function is proposed to solve the above technical problems. Utility Model Content

[0003] One of the objectives of this application is to provide a mold core-pulling structure with anti-retraction function.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: a mold core-pulling structure with anti-retraction function, comprising a mold body, a side forming component, and a limiting component. The mold body includes an upper mold and a lower mold. The lower mold includes a mold base and a mold body. The mold body is floatingly installed on the top of the mold base and cooperates with the upper mold. The side forming component includes a core block and a hydraulic cylinder. The hydraulic cylinder is installed on the side of the upper mold. The core block is slidably installed inside the upper mold and connected to the piston end of the hydraulic cylinder. The limiting component is fixedly installed on the mold base through its bottom end. When the mold is closed, the mold body abuts against the mold base. At this time, the top end of the limiting component penetrates the mold body and cooperates with the core block, so that the core block is in a locked state. When the mold is opened, the mold body separates from the mold base. At this time, the limiting component is located inside the mold body and disengages from the core block, thereby releasing the lock on the core block.

[0005] Preferably, the bottom end of the core block has a slot, and the top end of the limiting member cooperates with the slot to lock the core block; the side of the slot that cooperates with the limiting member has an inclined structure.

[0006] Preferably, the upper mold and the lower mold are engaged by a mechanical opener / closer; during mold opening, the mold body is adapted to move upward synchronously with the upper mold under the action of the mechanical opener / closer, so that the limiting member is disengaged from the core block; subsequently, the upper mold is adapted to be separated from the mold body by the mechanical opener / closer for demolding.

[0007] Preferably, the mechanical opening and closing device includes a locking rod and an unlocking seat. The locking rod is rotatably mounted on the upper mold via its top end, and the unlocking seat is mounted on the mold base and engages with the bottom end of the locking rod. During mold closing, the bottom end of the locking rod engages with the mold body. During mold opening, the upper mold is adapted to move the mold body upward synchronously via the locking rod, so that the bottom end of the locking rod moves upward until it abuts against the unlocking seat. Subsequently, the locking rod is adapted to rotate along its top end under compression until it disengages from the mold body.

[0008] Preferably, the bottom end of the locking rod has a snap-fit ​​portion, and the mold body is provided with a snap-fit ​​groove. The snap-fit ​​portion and the snap-fit ​​groove cooperate to realize the snap-fit ​​engagement between the locking rod and the mold body.

[0009] Preferably, the bottom end of the locking rod is provided with a pressure rod portion, and the unlocking seat includes a seat body and an unlocking block; the unlocking block is adjustablely installed on the seat body, and the unlocking block is provided with a pressing surface that cooperates with the pressure rod portion; during mold opening, the pressure rod portion is adapted to abut against the pressing surface to drive the locking rod to rotate.

[0010] Preferably, the seat body has limit grooves on both sides, and the unlocking block includes a front block and a rear block. The front block and the rear block are movably disposed in the corresponding limit grooves and are engaged with each other by limit screws.

[0011] Preferably, the limiting groove is provided with locking teeth, and the unlocking block is also provided with locking teeth on the side corresponding to the limiting groove.

[0012] Compared with the prior art, the beneficial effects of this application are as follows:

[0013] This invention features a limiting component and a floating mold body within the mold. During mold closing, the limiting component penetrates the mold body and engages with the core block, thereby locking the core block in a limited position. This prevents the side molding components from retracting during mold closing, thus ensuring the quality stability of the injection-molded product. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the existing product and the side molding component structure.

[0015] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the core block of this utility model in a locked, anti-reverse state.

[0017] Figure 4 This is a schematic diagram of the state of the core block of this utility model when it is unlocked.

[0018] Figure 5 This is a three-dimensional structural diagram of the upper and lower molds of this utility model when they are engaged by a mechanical opening and closing device.

[0019] Figure 6 This is an enlarged structural diagram of point A of this utility model.

[0020] Figure 7 This is a schematic diagram of the specific structure of the unlocking seat of this utility model.

[0021] Figure 8 This is a schematic diagram of the specific structure of the locking rod of this utility model.

[0022] Figure 9 This is a schematic diagram of the mechanical opening and closing device during mold closing according to this utility model.

[0023] Figure 10 This is a schematic diagram of the first process principle of the mechanical opening and closing device during mold opening of this utility model.

[0024] Figure 11 This is a schematic diagram illustrating the principle of the second process of the mechanical opening and closing device during mold opening in this utility model.

[0025] In the diagram: 1. Product; 2. Side forming component; 201. Hydraulic cylinder; 202. Core block; 3. Mold body; 301. Upper mold; 302. Lower mold; 3021. Mold base; 3022. Mold body; 4. Mechanical opener / closer; 401. Locking rod; 4011. Pressure rod part; 4012. Snap-fit ​​part; 402. Unlocking seat; 4021. Seat body; 4022. Unlocking block; 40221. Front block; 40222. Rear block; 5. Limiting component; 6. Limiting groove; 7. Clamping tooth; 8. Limiting screw; 9. Snap-fit ​​groove. Detailed Implementation

[0026] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0028] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0029] One preferred embodiment of this application, such as Figures 1 to 11 As shown, a mold core-pulling structure with anti-retraction function includes a mold body 3, a side forming component 2, and a limiting component 5. The mold body 3 includes an upper mold 301 and a lower mold 302. The lower mold 302 includes a mold base 3021 and a mold body 3022. The mold body 3022 is floatingly installed on the top of the mold base 3021 and cooperates with the upper mold 301. The side forming component 2 includes a core block 202 and a hydraulic cylinder 201. The hydraulic cylinder 201 (horizontally) is installed on the side of the upper mold 301. The core block 202 (horizontally) is slidably installed inside the upper mold 301 and connected to the piston end of the hydraulic cylinder 201. The limiting component 5 is fixedly installed on the mold base 3021 through its bottom end.

[0030] It is understandable that, such as Figure 3 As shown, during mold closing, the upper mold 301 and lower mold 302 abut against each other under the action of the closing force, and the mold body 3022 and mold base 3021 are also in abutting fit. At this time, the limiting member 5 will penetrate the mold body 3022 and abut against the core block 202, thereby locking the core block 202 in a limited position. This prevents the side molding component 2 from retracting during mold closing, thus ensuring the quality stability of the product 1 during injection molding. Figure 4 As shown, when the mold is opened, that is, when the upper mold 301 and the lower mold 302 are separated, since the limiting member 5 is installed in the mold base 3021 in a fixed position, the limiting member 5 will disengage from the core block 202, thereby releasing the lock on the core block 202. At the same time, the floating mold body 3022 will separate from the mold base 3021, so that the limiting member 5 moves relative to the mold body 3022 and retracts into the mold body 3022.

[0031] It should be noted that the mold body 3022 is floatingly mounted on the mold base 3021, which is an installation structure known to those skilled in the art. For example, the mold body 3022 is mounted on the mold base 3021 by means of springs, guide columns and other components, so that the mold body 3022 can move relative to the mold during the opening and closing process.

[0032] As a further description of the above embodiments: such as Figure 3 and Figure 4As shown, a slot is located at the bottom of the core block 202. During mold closing, the top of the limiting member 5 is vertically inserted into the slot, thereby locking the core block 202 to prevent it from sliding backward. It should be noted that since the core block 202 is horizontally positioned and the limiting member 5 is vertically positioned, the reaction force of the core block 202 on the top of the limiting member 5 is horizontal. Since the limiting member 5 is relatively long and fixed at its bottom, the top of the limiting member 5 experiences a significant horizontal force, which can affect its service life.

[0033] To address the aforementioned technical issues, the mating surface between the slot and the limiting member 5 preferably adopts an inclined structure, meaning the mating surfaces are inclined. This allows the reaction force of the core block 202 on the limiting member 5 to be decomposed into horizontal and vertical components. The vertical component effectively reduces the horizontal stress on the limiting member 5, thereby lowering the risk of deformation due to the limiting member 5 bearing a large force in a single direction. Simultaneously, the inclined mating structure also generates a self-locking effect during mold closing, further enhancing the positioning stability of the core block 202.

[0034] Based on the above embodiments, the following problems may also exist during use: When the mold is opened, the reset of the mold body 3022 relies entirely on the floating spring. In long-term use, the floating spring may experience fatigue, resulting in a decrease in the reset force, which in turn affects the reset accuracy of the mold body 3022. As a result, a vertical force may be generated between the product 1 and the core block 202, which may cause damage or displacement to the product 1 and affect the quality of the product 1.

[0035] Therefore, in this embodiment, as Figure 3 and Figure 4 As shown, the upper mold 301 and the lower mold 302 can be engaged by the mechanical opener / closer 4. It can be understood that during mold opening, the mold body 3022 can move upward synchronously with the upper mold 301 under the action of the mechanical opener / closer 4, so that the limiting member 5 disengages from the core block 202. That is, the upward movement of the mold body 3022 relies entirely on the coordinated action of the upper mold 301 and the mechanical opener / closer 4, without relying on the restoring force of the floating spring. This allows the mold body 3022 to move upward stably and accurately to the set position. At this time, the core block 202 will move upward and disengage from the limiting member 5, allowing the hydraulic cylinder 201 to horizontally pull out the core block 202 for demolding. Then, the upper mold 301 continues to move upward to open the mold, at which point the mechanical opener / closer 4 disengages from the mold body 3022, thus separating the upper mold 301 from the mold body 3022. Finally, the product 1 is ejected by the ejector pin mechanism within the lower mold 302.

[0036] This application does not specifically limit the structure of the mechanical opening and closing device 4. The following is a specific embodiment for reference:

[0037] like Figure 6 As shown, the mechanical opening / closing device 4 includes a locking rod 401 and an unlocking seat 402. The locking rod 401 is rotatably mounted on the upper mold 301 via its top end, and the unlocking seat 402 is mounted on the mold base 3021 and engages with the bottom end of the locking rod 401. Figure 8 As shown, the bottom end of the locking rod 401 has a snap-fit ​​part 4012, and the mold body 3022 is provided with a snap-fit ​​groove 9.

[0038] It is understandable that during mold closing, such as Figure 9 As shown, the locking rod 401 is in a vertical position at this time, and the locking part 4012 engages with the locking groove 9, that is, the locking rod 401 and the mold body 3022 are engaged, so the upper mold 301 and the mold body 3022 can be regarded as a whole. Therefore, the mold opening process involves two steps. The first step: the upper mold 301 can drive the mold body 3022 to move upward synchronously through the locking rod 401, that is, the mold body 3022 moves upward to a set position, and then the side forming component 2 performs the core pulling action. The second step: as shown Figure 10 As shown, the upper mold 301 continues to move upward, and the bottom end of the locking rod 401 will then contact and engage with the unlocking seat 402; as Figure 11 As shown, under the pressure of contact, the locking rod 401 will rotate along the top and until it disengages from the mold body 3022, that is, the snap-fit ​​part 4012 separates from the snap-fit ​​groove 9, so as to realize the demolding between the upper mold 301 and the mold body 3022.

[0039] Specifically, such as Figure 6 As shown, a pressure rod portion 4011 is provided at the bottom end of the locking rod 401, and the unlocking seat 402 includes a seat body 4021 and an unlocking block 4022; wherein the unlocking block 4022 is adjustablely installed on the seat body 4021, and the unlocking block 4022 is provided with an extrusion surface (e.g., a sloped surface or an arc-shaped surface) that cooperates with the pressure rod portion 4011. It can be understood that during mold opening, the pressure rod portion 4011 will move upward and abut against the extrusion surface. As the upward height increases, the pressure rod portion 4011 will slide along the extrusion surface, and the extrusion surface will exert a force on the pressure rod portion 4011 to drive the locking rod 401 to rotate outward and disengage from the mold body 3022.

[0040] like Figure 6 and Figure 7 As shown, the installation method of the unlocking block 4022 and the base 4021 is as follows: a limit groove 6 is provided on both sides of the base 4021. The unlocking block 4022 includes a front block 40221 and a rear block 40222. The front block 40221 and the rear block 40222 are both movably set in the corresponding limit groove 6 and are engaged with each other by a limit screw 8.

[0041] Understandably, when adjusting the unlocking block 4022, loosening the limiting bolt allows for vertical adjustment of the unlocking block 4022. Once adjusted to the appropriate height, tightening the limiting bolt ensures that the front block 40221 and the rear block 40222 abut against the limiting groove 6, thus locking the unlocking block 4022. The adjustment method is simple and convenient. It should be noted that by adjusting the vertical position of the unlocking block 4022, the locking rod 401 can be unlocked at the specific height required for upward movement, offering high flexibility and adaptability to different mold structures and mold opening requirements.

[0042] Furthermore, a locking tooth 7 can be provided in the limiting groove 6, and a locking tooth 7 is also provided on the side of the unlocking block 4022 (i.e. the front block 40221 and the rear block 40222) corresponding to the limiting groove 6. In this way, the intermeshing between the locking teeth 7 can further enhance the stability of the unlocking block 4022 in the limiting groove 6 and prevent the unlocking block 4022 from shifting during the mold opening and closing process.

[0043] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A mold core-pulling structure with anti-retraction function, characterized in that, include: The mold body includes an upper mold and a lower mold. The lower mold includes a mold base and a mold body. The mold body is floatingly mounted on the top of the mold base and cooperates with the upper mold. A side-forming assembly, comprising a core block and a hydraulic cylinder, the hydraulic cylinder being mounted on the side of the upper mold, the core block being slidably mounted within the upper mold and connected to the piston end of the hydraulic cylinder; and A limiting component is fixedly installed on the mold base at its bottom end. During mold closing, the mold body abuts against the mold base, and the top end of the limiting component penetrates the mold body and engages with the core block, thereby locking the core block. During mold opening, the mold body separates from the mold base, and the limiting component is located inside the mold body and disengages from the core block, thus releasing the lock on the core block.

2. The mold core-pulling structure with anti-retraction function as described in claim 1, characterized in that: The bottom end of the core block has a slot, and the top end of the limiting member cooperates with the slot to lock the core block; the side of the slot that cooperates with the limiting member has an inclined structure.

3. The mold core-pulling structure with anti-retraction function as described in claim 1, characterized in that: The upper mold and the lower mold are engaged by a mechanical opener / closer; when the mold is opened, the mold body is adapted to move upward synchronously with the upper mold under the action of the mechanical opener / closer, so that the limiting member is disengaged from the core block; Subsequently, the upper mold is adapted to be separated from the mold body and demolded by the mechanical opener / closer.

4. The mold core-pulling structure with anti-retraction function as described in claim 3, characterized in that: The mechanical opener / closer includes a locking rod and an unlocking seat. The locking rod is rotatably mounted on the upper mold via its top end, and the unlocking seat is mounted on the mold base and engages with the bottom end of the locking rod. During mold closing, the bottom end of the locking rod engages with the mold body; during mold opening, the upper mold is adapted to move the mold body upward synchronously via the locking rod, so that the bottom end of the locking rod moves upward until it abuts against the unlocking seat, and then the locking rod is adapted to rotate along the top end under the squeezing action until it disengages from the mold body.

5. The mold core-pulling structure with anti-retraction function as described in claim 4, characterized in that: The bottom end of the locking rod has a snap-fit ​​part, and the mold body is provided with a snap-fit ​​groove. The snap-fit ​​part and the snap-fit ​​groove cooperate to realize the snap-fit ​​cooperation between the locking rod and the mold body.

6. The mold core-pulling structure with anti-retraction function as described in claim 4 or 5, characterized in that: The bottom end of the locking rod is provided with a pressure rod portion, and the unlocking seat includes a seat body and an unlocking block; the unlocking block is adjustablely installed on the seat body, and the unlocking block is provided with a pressing surface that cooperates with the pressure rod portion; when the mold is opened, the pressure rod portion is adapted to abut against the pressing surface to drive the locking rod to rotate.

7. The mold core-pulling structure with anti-retraction function as described in claim 6, characterized in that: The base is provided with limit grooves on both sides, and the unlocking block includes a front block and a rear block. The front block and the rear block are movably disposed in the corresponding limit grooves and are engaged with each other by limit screws.

8. The mold core-pulling structure with anti-retraction function as described in claim 7, characterized in that: The limiting groove is provided with locking teeth, and the unlocking block is also provided with locking teeth on the side corresponding to the limiting groove.

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