Die sliding block driving mechanism and die
By cooperating with a power device and a limiter that are independent of the mold opening and closing, the problem of the mold slider retreating due to plastic pressure during the injection molding process is solved, and stable movement of the slider and a high pass rate are achieved.
Patent Information
- Application Number
- CN202422600624.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-10-28
AI Technical Summary
During the injection molding process, the mold slider is easily retreated due to plastic pressure, resulting in the product structure not meeting the requirements. The existing technology makes it difficult to achieve stable movement of the slider.
The slider is driven by a power device independent of the mold opening and closing power mechanism, and the concave-convex fit between the limiter and the connector ensures stable switching of the slider between the injection and demoulding positions.
The slider is moved to the demoulding position before the mold is opened, which improves the injection molding qualification rate. The structure is simple and the operation is reliable. The slider movement is independent of the mold opening and closing.
Smart Images
Figure CN223314383U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of molds, in particular to a mold slider driving mechanism and a mold. Background Art
[0002] The slider in the mold is designed to facilitate lateral core pulling, solving demolding issues for plastic products with grooves, protrusions, or other complex geometries. For designs where the undercut requires pre-pull, meaning the slider must be pulled before the mold is opened, a shovel cannot be used to hold the slider in place. This is because a shovel only releases the slider's position during mold opening, allowing it to be pulled and moved. Without a shovel, the plastic pressure during injection molding would cause the slider to retreat, resulting in a non-compliant plastic product. Summary of the Invention
[0003] The purpose of the utility model is to provide a mold slider driving mechanism and a mold, which can realize the stability of the slider during the initial withdrawal and injection molding.
[0004] To achieve the above objectives, the technical solution of the present utility model includes:
[0005] A mold slider drive mechanism, which is used for the mold and includes a slider, a connecting member and a power device. Along the sliding direction of the slider, the two ends of the connecting member are respectively connected to the slider and the power device. The power device is independent of the mold opening and closing power mechanism of the mold. The mold uses its mold opening and closing power mechanism to open and close the mold, so that the movement of the slider is independent of the mold opening and closing. The position of the slider during injection molding of the mold is defined as the injection position, and the position of the slider during demolding of the mold is defined as the demolding position. The power device can provide pressure to the slider with the help of the connecting member to switch it to and maintain the injection position, and can also provide pulling force to the slider to switch it to the demolding position.
[0006] In one embodiment, the power device is a cylinder, and the reciprocating motion of the cylinder drives the connecting member to reciprocate along its extension direction. The cylinder abuts against the slider with the help of the connecting member to provide pressure to the slider to switch and maintain it in the injection position, or pulls the slider with the help of the connecting member to provide pulling force to the slider to switch it to the demolding position.
[0007] In one embodiment, the direction in which the slider moves from the injection position to the demolding position is defined as the demolding direction, and a limit member is also included. The limit member is movably arranged on the slider, and a fixing member corresponding to the limit member is provided on the outer side of the slider. The fixing member is provided with a limit groove. By means of the relative movement of the limit member and the slider, a part of the limit member can selectively form a concave-convex fit with the limit groove of the fixing member. The limit member forms a movement limit of the slider by means of the concave-convex fit to prevent the slider from moving unexpectedly toward the demolding direction.
[0008] In one embodiment, the connecting member is provided with a sliding portion and a yielding portion, wherein the sliding portion enables the connecting member to form a relative sliding connection with the slider. As the connecting member slides relative to the slider along the demolding direction, the yielding portion corresponds to the limiting member and forms a yielding of the limiting member. The limiting member disengages from the limiting groove with the aid of the yielding, thereby releasing the movement limit of the slider by the limiting member.
[0009] In one embodiment, the connecting member is further provided with a retaining portion, which is used to abut against the limiting member so that the limiting member and the fixing member form a concave-convex fit, and the giving way portion is an inward concave structure relative to the holding portion. The holding portion is arranged in the demoulding direction of the giving way portion. As the connecting member slides relative to the slider along the demoulding direction, the holding portion and the giving way portion correspond to the limiting member in sequence.
[0010] In one embodiment, a first limiting inclined surface is provided between the retaining portion and the yielding portion, and the limiting member is provided with a second limiting inclined surface. The first limiting inclined surface corresponds to the second limiting inclined surface, so that when the connecting member moves against the demolding direction, the limiting member can form a concave-convex fit with the limiting groove under the push of the first limiting inclined surface.
[0011] In one embodiment, along the demoulding direction, the giving way portion is a conical structure with a gradually increasing outer diameter, and the limiting member is provided with a guiding inclined surface corresponding to the conical structure. As the connecting member slides relative to the slider along the demoulding direction, the giving way portion gradually gives way to the limiting member to form a giving way; and as the connecting member slides relative to the slider against the demoulding direction, the giving way portion of the conical structure cooperates with the guiding inclined surface to push the limiting member so that the limiting member and the limiting groove form the concave-convex fit.
[0012] In one embodiment, the fixing member is provided with a first give-way inclined surface, and the limiting member is provided with a second give-way inclined surface. As the slider moves along the demolding direction, the first give-way inclined surface and the second give-way inclined surface cooperate to make the limiting member move in the direction close to the give-way portion, thereby releasing the concave-convex cooperation.
[0013] In one embodiment, a limiting member is provided on each side of the slider, and the limiting member forms a symmetrical movement limit for the slider; and / or,
[0014] An abutting surface is provided at one end of the sliding portion opposite to the demoulding direction. As the connecting member moves along the demoulding direction, the abutting surface of the sliding portion abuts against the slider to pull the slider to move along the demoulding direction.
[0015] The technical solution of the utility model also includes:
[0016] A mold includes a slider, which is moved by a mold slider driving mechanism.
[0017] The beneficial effects of the present invention are as follows: by making the power device that drives the movement of the slider independent of the opening and closing of the mold, the movement of the slider is made independent of the opening and closing of the mold, so that the slider can be moved to the demoulding position before the mold is opened, and is suitable for molds that need to move the slider before opening the mold. Secondly, the power device can provide pressure to the slider to keep the slider in the injection molding position, and prevent the slider from retreating unexpectedly under the action of the injection molding pressure. Thirdly, the concave and convex matching limit formed by the limiter and the fixing member cooperates with the power device, which can further improve the stability of the slider and improve the qualified rate of injection molding. Finally, the limiter is linked with the connecting member, so that the slider can release the limit and move in the demoulding direction under the action of only one power device, making the structure of the slider driving mechanism simpler and the operation more reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a three-dimensional diagram of the use state of embodiment 1 of the present utility model.
[0019] Figure 2 This is an incomplete top view of Example 1 of the present utility model, in which the slider is in the injection molding position.
[0020] Figure 3 It is an incomplete top view of Example 1 of the present utility model, in which the slider is in the demoulding position.
[0021] Figure 4 It is a three-dimensional diagram of the connecting piece of Example 1 of the present utility model.
[0022] Figure 5 It is a three-dimensional diagram of the limiting member of Example 1 of the present utility model.
[0023] Figure 6 It is a three-dimensional diagram of the fixing member of the embodiment of the present utility model.
[0024] Figure 7 This is an incomplete top view of Example 2 of the present utility model, in which the slider is in the injection molding position.
[0025] Figure 8 It is an incomplete top view of Example 2 of the present utility model, in which the slider is in the demoulding position.
[0026] Among them: 1 slider, 2 connecting part, 21 sliding part, 211 abutting surface, 212 pushing surface, 22 giving way part, 23 holding part, 24 first limiting inclined surface, 3 power device, 30 cylinder, 4 limiting part, 41 second limiting inclined surface, 42 second giving way inclined surface, 43 mounting groove, 44 guide inclined surface, 5 fixing part, 51 limiting groove, 52 first giving way inclined surface, 6 bolts, 7 pressure block, 8 extraction needle.
[0027] Demolding direction X1, injection direction X2. DETAILED DESCRIPTION
[0028] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the disclosure of this invention and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will understand other possible implementations and the advantages of this invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.
[0029] Example 1
[0030] See Figures 1 to 3 As shown, the utility model discloses a mold slider driving mechanism, which is used for the mold and includes a slider 1, a connecting member 2 and a power device 3. Along the sliding direction of the slider 1, the two ends of the connecting member 2 are respectively connected to the slider 1 and the power device 3. The power device 3 is independent of the mold opening and closing power mechanism. The mold uses its mold opening and closing power mechanism to realize mold opening and closing, so that the movement of the slider 1 is independent of the mold opening and closing.
[0031] The position of the slider 1 during injection molding is defined as the injection position. The position of the slider 1 during demolding is defined as the demolding position. The direction in which the slider moves from the injection position to the demolding position is defined as the demolding direction X1, and the opposite direction is defined as the injection direction X2. The power device 3 can apply pressure to the slider via the connector 2 to switch it to and maintain it in the injection position. It can also apply tension to the slider 1 to move it from the injection position along the demolding direction X1 to the demolding position.
[0032] By separating the power unit 3 that drives the slider 1 from the mold opening and closing, the present invention allows the slider 1 to move independently of the mold opening and closing. This allows the slider 1 to be moved to the demolding position before the mold is opened. This is suitable for molds that require the slider to be moved before the mold is opened. Furthermore, the power unit 3 provides pressure to the slider 1 to maintain the injection position, preventing the slider 1 from unintentionally retreating under the action of the injection pressure, thereby maintaining the stability of the slider 1.
[0033] In this embodiment, the power device 3 is a cylinder 30. The reciprocating motion of the cylinder 30 drives the connector 2 to reciprocate along its extension direction. The cylinder 30, by means of the connector 2 abutting against the slider 1, applies pressure to the slider to cause it to switch to and maintain the injection position, or by means of the connector 2 pulling the slider 1, applies a pulling force to the slider 1 to cause it to switch to the demolding position. In other embodiments, the power device 3 may also be a powered device such as a hydraulic cylinder or a motor, and this power device can drive the connector 2 and the slider 1 to reciprocate along the slider 1's predetermined sliding direction, thereby switching the slider 1 between the injection position and the demolding position.
[0034] See Figures 1 to 6 As shown, due to the limited air pressure of the cylinder, if the injection pressure is too high, the pressure of the cylinder is not enough to maintain the stability of the slider in the injection position. Therefore, a limiter 4 is also provided to form a mechanical limit for the slider. The limiter 4 is movably arranged on the slider 1. A fixing member 5 is provided on each outer side of the slider 1, and the two fixing members 5 correspond to the limiter 4 respectively. The fixing member 5 is provided with a limiting groove 51. With the help of the relative movement of the limiter 4 and the slider 1, a part of the limiter 4 can selectively form a concave-convex fit with the limiting groove 51 of the fixing member 5. The limiter 4 forms a motion limit for the slider 1 by means of the concave-convex fit to prevent the slider 1 from moving unexpectedly in the demoulding direction X1. The motion limit of the slider 1 is formed by the concave-convex fit between the limiter 4 and the limiting groove 51, which can cooperate with the cylinder 30 to maintain the stability of the slider 1, thereby preventing the slider 1 from moving in the demoulding direction X1 due to the pressure of the plastic during the injection molding process.
[0035] The connector 2 is provided with a sliding portion 21 and a yielding portion 22. The sliding portion 21 enables the connector 2 to form a relative sliding connection with the slider 1. As the connector 2 slides relative to the slider 1 along the demolding direction X1, the yielding portion 22 corresponds to the limiter 4, causing the limiter 4 to yield. The limiter 4 disengages from the limiting groove 51 by virtue of this yielding, thereby releasing the limiter 4 from the movement restriction on the slider 1. The connector 2 is also provided with a retaining portion 23, which is used to abut against the limiter 4 to form a concave-convex fit between the limiter 4 and the fixing member 5. The yielding portion 22 is a concave structure relative to the retaining portion 23. The retaining portion 23 is arranged in the demolding direction X1 of the yielding portion 22. As the connector 2 slides relative to the slider 1 along the demolding direction X1, the retaining portion 23 and the yielding portion 22 correspond to the limiter 4 in sequence. A first limiting slope 24 is provided between the retaining portion 23 and the yielding portion 22, and a second limiting slope 41 is provided on the limiting member 4. The first limiting slope 24 corresponds to the second limiting slope 41, so that when the connecting member 2 moves against the demolding direction X1 (i.e., along the injection direction X2), the limiting member 4 can be pushed by the first limiting slope 24 to form a concave-convex fit with the limiting groove 51. The fixing member 5 has a first yielding slope 52, and the limiting member 4 has a second yielding slope 42. As the slider 1 moves along the demolding direction X1, the first yielding slope 52 and the second yielding slope 42 cooperate to cause the limiting member 4 to move in a direction closer to the yielding portion 22, thereby releasing the concave-convex fit.
[0036] An abutment surface 211 is provided at one end of the sliding portion 21, facing opposite the demolding direction X (i.e., along the injection direction X2). As the connector 2 moves along the demolding direction X1, the abutment surface 211 of the sliding portion 21 abuts against the slider 1, pulling the slider 1 along the demolding direction X1. To further maintain a secure connection between the slider 1 and the connector 2, a pressure block 7 is provided on the slider 1 to press the connector 2 against the slider 1. A pushing surface 212 is provided at the other end of the sliding portion 21. When the cylinder 30 pushes the slider 1 toward the injection direction X2 via the connector 2, the slider 1 and the limiting member 4 move synchronously until the limiting member 4 aligns with the limiting groove 51 (at which point the slider 1 reaches the injection position). The limiting member 4, under the action of the first limiting inclined surface 24 and the second limiting inclined surface 41, is inserted into the limiting groove 51, limiting the movement of the slider 1. Due to the presence of the sliding portion 21, the connector 2 continues to slide relative to the slider 1 until the end of the connector 2 or the push surface 212 of the sliding portion 21 abuts the slider 1, causing the cylinder 30 to exert a retaining force on the slider 1. This retaining force, in conjunction with the position-limiting member 4, maintains the slider 1 in the injection molding position. In this embodiment, the push surface of the sliding portion 21 and the end of the connector 2 abut against the slider 1 simultaneously.
[0037] The slider 1 is provided with a slide groove, and the limit member 4 is installed in the slide groove to form a relative sliding connection with the slider. The sliding direction of the limit member 4 is the extension direction of the slide groove. In this embodiment, the sliding direction Y of the limit member 4 is perpendicular to the injection molding direction X2. A mounting groove 43 is provided in the middle of the limit member 4. The mounting groove 43 is provided with a bolt 6 fixedly connected to the slider 1. When the limit member 4 slides in the slide groove of the slider 1, the mounting groove 43 and the bolt 6 form a relative sliding connection. In this embodiment, a limit member 4 is provided on each side of the connecting member 2, and each limit member 4 corresponds to a fixing member 5 with a limiting groove 51, thereby forming a relatively stable and symmetrical limit for the slider on both sides of the connecting member 2. In other embodiments, the limit member 4 can be provided only on one side of the connecting member 2, thereby forming a unilateral limit for the slider. However, because the slider 1 is a unitary structure, a unilateral limit can also play a limiting role for the slider 1.
[0038] The movement of the limiter 4 in this embodiment is driven by the movement of the slider 1, the connecting member 2, and the fixing member 5, more specifically, by the movement of the entire slider drive mechanism driven by the cylinder 30. When the slider 1 moves along the demolding direction X1, the limiter 4 moves along with the slider 1. The first and second stop bevels 52 and 42 cooperate to move the limiter 4 toward the stop portion 22, thereby releasing the movement limit on the slider 1. When the slider 1 moves along the injection direction X2, the first and second stop bevels 24 and 41 cooperate to move the limiter 4 toward the stop groove 51 of the fixing member 5, thereby limiting the movement of the slider 1. Therefore, the slider drive mechanism only requires one power device 3 as a power source, making the movement control of the slider 1 simpler. With the help of the linkage between the parts, the movement sequence control between the limiter 4 and the slider 1 can also be more reliable.
[0039] In other embodiments, the movement of the limiting member 4 can also be achieved by providing an elastic member to release the movement restriction on the slider 1. For example, an elastic member is provided between the inner wall of the mounting groove 43 of the limiting member 4 at one end near the fixing member 5 and the bolt 6, and the elastic force of the elastic member is used to urge the limiting member 4 to move toward the clearance portion 22. In addition, the movement of the limiting member 4 can also rely on other power mechanisms to achieve the movement restriction of the slider 1 by the limiting member 4 or release the movement restriction on the slider 1. The power mechanism driving the limiting member can be, for example, a motor or a cylinder dedicated to driving the movement of the limiting member 4.
[0040] See Figure 1 As shown, the slider 1 of this embodiment is connected to a pull-out needle 8, which drives the pull-out needle 8 to complete the core pulling of the mold, but is not limited to this. In other embodiments, a part of the slider 1 can cooperate with the mold core of the mold to form a cavity.
[0041] Example 2
[0042] See Figure 7 and Figure 8 As shown, the difference between this embodiment and embodiment 1 is that: along the demolding direction X1, the yielding portion 21 of this embodiment is a tapered structure with a gradually increasing outer diameter, and the limiting member 4 is provided with a guide bevel 44 corresponding to the tapered structure. As the connecting member 2 slides relative to the slider 1 along the demolding direction, the yielding portion 22 gradually yields to the limiting member 4 to form a yielding position. And as the connecting member 2 slides relative to the slider 1 against the demolding direction X1 (i.e., along the injection direction X), the yielding portion 22 of the tapered structure cooperates with the guide bevel 44 to push the limiting member 4 so that the limiting member 4 forms a concave-convex fit with the limiting groove 51. Therefore, the connecting member 2 of this embodiment does not need to be provided with a retaining portion, and the yielding of the limiting member 4 and the driving of the limiting member 4 toward the limiting groove 51 can be achieved by cooperating with the yielding portion 22 and the guide bevel 44 of the limiting member 4.
[0043] The other undescribed parts of this embodiment are the same as those of embodiment 1.
[0044] Example 3
[0045] This embodiment discloses a mold, which includes a slider. The slider and its driving mechanism have been disclosed in Examples 1 and 2 and will not be repeated here.
[0046] Although the present invention is specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that the remaining undescribed parts are prior art, and that various changes made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined by the appended claims fall within the scope of protection of the present invention.
Claims
1. A mold slider driving mechanism, the slider being used for a mold, characterized in that: The utility model comprises a slider, a connecting member and a power device. Along the sliding direction of the slider, the two ends of the connecting member are respectively connected to the slider and the power device. The power device is independent of the mold opening and closing power mechanism of the mold. The mold realizes mold opening and closing with the help of its mold opening and closing power mechanism, so that the movement of the slider is independent of the mold opening and closing. The position of the slider during injection molding of the mold is defined as the injection position, and the position of the slider during demolding of the mold is defined as the demolding position. The power device can provide pressure to the slider with the help of the connecting member to switch and maintain it in the injection position, and can also provide pulling force to the slider to switch it to the demolding position.
2. A mold slider driving mechanism according to claim 1, characterized in that: The power device is a cylinder, and the reciprocating motion of the cylinder drives the connecting member to reciprocate along its extension direction. The cylinder abuts against the slider with the help of the connecting member to provide pressure to the slider to switch and maintain it in the injection position, or pulls the slider with the help of the connecting member to provide pulling force to the slider to switch it to the demolding position.
3. The mold slider driving mechanism according to claim 1, characterized in that: The method defines a direction in which the slider moves from the injection position to the demoulding position as a demoulding direction, and further includes a limit member, which is movably arranged on the slider, and a fixing member corresponding to the limit member is provided on the outer side of the slider, and the fixing member is provided with a limit groove. By means of the relative movement of the limit member and the slider, a part of the limit member can selectively form a concave-convex fit with the limit groove of the fixing member, and the limit member forms a movement limit of the slider by means of the concave-convex fit to prevent the slider from moving unexpectedly toward the demoulding direction.
4. The mold slider driving mechanism according to claim 3, characterized in that: The connecting member is provided with a sliding portion and a yielding portion, wherein the sliding portion enables the connecting member to form a relative sliding connection with the slider. As the connecting member slides relative to the slider along the demoulding direction, the yielding portion corresponds to the limiting member to form a yielding of the limiting member. The limiting member disengages from the limiting groove by virtue of the yielding, thereby releasing the movement limit of the slider by the limiting member.
5. The mold slider driving mechanism according to claim 4, characterized in that: The connecting member is further provided with a retaining portion, which is used to abut against the limiting member so that the limiting member and the fixing member form a concave-convex fit. The giving portion is a concave structure relative to the retaining portion. The retaining portion is arranged in the demoulding direction of the giving portion. As the connecting member slides relative to the slider along the demoulding direction, the retaining portion and the giving portion correspond to the limiting member in sequence.
6. The mold slider driving mechanism according to claim 5, characterized in that: A first limiting inclined surface is provided between the retaining portion and the giving way portion, and a second limiting inclined surface is provided on the limiting member. The first limiting inclined surface corresponds to the second limiting inclined surface, so that when the connecting member moves against the demoulding direction, the limiting member can form a concave-convex fit with the limiting groove under the push of the first limiting inclined surface.
7. The mold slider driving mechanism according to claim 4, characterized in that: Along the demoulding direction, the giving way portion is a conical structure with a gradually increasing outer diameter, and the limiting member is provided with a guiding inclined surface corresponding to the conical structure. As the connecting member slides relative to the slider along the demoulding direction, the giving way portion gradually gives way to the limiting member to form a giving way; and as the connecting member slides relative to the slider against the demoulding direction, the giving way portion of the conical structure cooperates with the guiding inclined surface to push the limiting member so that the limiting member and the limiting groove form the concave-convex fit.
8. The mold slider driving mechanism according to claim 4, characterized in that: The fixing member is provided with a first give-way inclined surface, and the limiting member is provided with a second give-way inclined surface. As the slider moves along the demoulding direction, the first give-way inclined surface and the second give-way inclined surface cooperate to make the limiting member move in the direction close to the give-way portion, thereby releasing the concave-convex cooperation.
9. The mold slider driving mechanism according to claim 4, characterized in that: Limiting members are respectively provided on both sides of the slider, and the limiting members form symmetrical movement limits for the slider; and / or, An abutting surface is provided at one end of the sliding portion opposite to the demoulding direction. As the connecting member moves along the demoulding direction, the abutting surface of the sliding portion abuts against the slider to pull the slider to move along the demoulding direction.
10. A mold, characterized in that: The mold comprises a slider, and the slider is moved by a mold slider driving mechanism according to any one of claims 1 to 9.