Injection mold
By introducing a locking and disengaging state between the slider and the drive mechanism in the injection mold, the problem of PIN pin deformation preventing insertion is solved, thereby improving the utilization rate of PIN pins, reducing production costs, and enhancing the operational flexibility and automation level of the mold.
Patent Information
- Application Number
- CN202423305247.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2034-12-31
AI Technical Summary
When handling special pin structures, existing injection molds often result in the pin tip being deformed due to being suspended in the air, making it impossible to accurately insert into the slider hole, leading to a high pin scrap rate and increased production costs.
By combining a slider mechanism with a drive mechanism, the slider seat and slider core are disengaged through the locking and disengaging states of the push rod and the stop, allowing manual or other power assistance to align the PIN with the preset hole, reducing the alignment accuracy requirements and avoiding damage to the PIN.
It increases the utilization rate of pins, reduces production costs, enhances the operational tolerance and automation level of molds, and reduces the discard rate of pins.
Smart Images
Figure CN223918504U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of plastic forming, and particularly relates to an injection mold. BACKGROUND
[0002] The injection mold with a PIN needle structure in the prior art usually uses a slider mechanism to realize core pulling of the PIN needle shell. However, for some special PIN needle structures, since the distance between the fixing point on the mold and the PIN needle tip is large, the PIN needle tip is in a'suspended' state, and due to the PIN needle structure and material, it is easy to deform under external force. Especially in the process of non-processing injection molding, it is often squeezed in the process such as packaging and transportation, which causes the PIN needle tip to be unable to accurately insert into the preset hole on the slider during injection molding, resulting in the inability to injection mold.
[0003] In the prior art, there is a scheme of using a laser detection mechanism to accurately detect whether the PIN needle tip position after installation is at the accurate position. However, the accuracy of the PIN needle tip position needs to be limited to be high. On the one hand, high accuracy leads to an increase in the number of PIN needles that cannot be used. Since the PIN needle is usually made of copper material, the surface is coated with expensive metals such as gold and silver, and the cost is extremely high. Some even as high as 50% of a single injection molded part. The PIN needle scrap rate is high, which greatly increases the production cost. In addition, if the PIN needle tip position is adjusted manually, the accuracy of the laser detection cannot be met. On the other hand, if the accuracy requirement is reduced, there will always be some PIN needles that cannot be correctly inserted into the preset hole due to a small deviation, and the oil cylinder acting on the slider will cause the PIN needle to be damaged. The gap between the oil cylinder and the slider caused by the thickness of the PIN needle affects the normal use of other structures, such as causing deformation of other PIN needles that can normally be inserted into the preset hole, which cannot be used again. SUMMARY
[0004] In order to overcome one of the aforementioned problems in the prior art, the purpose of the present application is to provide an injection mold and an operating method thereof, which can improve the use rate of PIN needles and reduce production costs. The technical scheme is as follows:
[0005] An injection mold, comprising a slider mechanism, the slider mechanism comprising a slider core and a slider seat, the slider core being fixed with the slider seat, a PIN needle being fixed on a mold core, the slider core fixing the PIN needle during injection molding, the slider core being provided with a preset hole at a corresponding position, further comprising a driving mechanism used in cooperation with the slider seat, the driving mechanism comprising a push rod and a stop block provided on the slider seat, the stop block being cooperated with the slider seat through an elastic element to make the stop block and the push rod in a locked and separated state.
[0006] Optionally, the end of the push rod is provided with a blocking surface, which can hook the block to drive the slider block and the slider core to separate from the mold cavity.
[0007] Optionally, the end of the push rod is provided with a first inclined surface, and the end of the block is provided with a second inclined surface matched with the first inclined surface, which can facilitate the block to pass over the first inclined surface and reach the blocking surface position.
[0008] Optionally, the driving mechanism further comprises a limiting member, which makes the block displace to the limiting member and separate from the push rod.
[0009] Optionally, the limiting member is provided with a third inclined surface matched with the second inclined surface at the end of the block, which can displace the block and separate from the push rod.
[0010] Optionally, it further comprises a fixed seat, and the third inclined surface is directly or indirectly fixed on the fixed seat, that is, it remains relatively stationary with the fixed seat, and the push rod works with relative motion with the fixed seat, that is, with relative motion with the third inclined surface.
[0011] Optionally, the driving mechanism comprises an oil cylinder, and the oil cylinder is fixed with the push rod to drive the push rod to move.
[0012] Optionally, the oil cylinder is arranged on the fixed seat.
[0013] Optionally, the push rod is provided with a sliding groove, and the blocking surface is located on one side of the sliding groove.
[0014] Optionally, the elastic element is a compression spring, one end of which is arranged on the block, and the other end is arranged on the slider block.
[0015] Optionally, the driving mechanism comprises a gas cylinder, and the slider block pushes the slider core into the mold cavity to a preset position through the gas cylinder, the resistance of the gas cylinder meets the PIN needle contact with the slider core, and the resistance of the slider core makes the gas cylinder stop running because it cannot be inserted into the preset hole.
[0016] Optionally, the gas cylinder is fixed on the fixed seat.
[0017] Compared with existing technologies, this application provides a novel structure in which the drive mechanism can disengage from the slider seat, solving the technical problem of collision between the hydraulic cylinder and deformed PIN pins during insertion, thus improving the utilization rate of deformed PIN pins. Specifically, the drive mechanism achieves locking and disengagement states with the slider seat via a push rod. When locked, the drive mechanism can drive the slider seat and slider core to disengage from the mold cavity. When disengaged, the drive mechanism is not subject to the push rod and can provide other power for the slider seat and slider core to insert into the mold cavity. Other power can include manual operation or a cylinder, which can stop when the PIN pin is deformed and cannot be correctly inserted into the preset hole, preventing the slider seat and slider core from continuing to move into the mold cavity and damaging the PIN pin. At this time, the deformed PIN pin (specifically the part that cannot be correctly inserted into the preset hole) can be manually aligned with the preset hole, improving the utilization rate of PIN pins and reducing production costs. Alternatively, the PIN pin can be directly replaced, but this will result in waste. Furthermore, since the tip of the PIN pin can be very close to the preset hole at this time, it is convenient to manually align the PIN pin with the preset hole without requiring extremely high precision. If there is a guide ramp design at the entrance of the preset hole, then aligning with the guide ramp can greatly increase the probability of the PIN pin entering the preset hole, without requiring precise alignment. This provides a high degree of operational tolerance. Other power options can simultaneously detect situations where the PIN pin cannot be correctly inserted into the preset hole and facilitate PIN pin replacement or assist in aligning the PIN pin with the preset hole.
[0018] This application solution can improve the utilization rate of PIN pins and reduce production costs. It is especially suitable for situations where PIN pins are deformed due to stress during processing, packaging, transportation, and storage. Attached Figure Description
[0019] Figure 1 This is a schematic diagram showing the assembly state of the slider core, slider seat, push rod, and drive mechanism in the injection mold described in Example 1.
[0020] Figure 2 This is a schematic diagram of the slider core of the injection mold described in Example 1;
[0021] Figure 3 This is a schematic diagram of the assembly state of the ejector pin, stop block, and third inclined surface of the injection mold described in Example 1;
[0022] Figure 4 This is a schematic diagram of the assembly state of the ejector pin and the third inclined surface of the injection mold described in Example 1;
[0023] Figure 5 This is a schematic diagram showing the assembly state of the slider seat, push rod, and drive mechanism in the injection mold described in Example 2.
[0024] In the figure, the reference numerals are as follows: slider core 1, preset hole 101, slider seat 2, stop block 201, second inclined surface 2011, compression spring 202, push rod 3, first inclined surface 301, blocking surface 302, slide groove 303, limiting component 4, third inclined surface 401, oil cylinder 5, fixed seat 6, and air cylinder 7. Detailed Implementation
[0025] The specific implementation of this application is described in detail below through examples. However, the specific implementation of this application is not intended to limit the technical solution of this application. Any non-substantial changes, such as replacing common technical solutions in the field, using the technical solutions described in the embodiments of this application are within the protection scope of this application. Example 1
[0026] like Figures 1-4 The injection mold shown includes a slider mechanism, which includes a slider core and a slider seat. The slider core is fixed to the slider seat, and a pin is fixed on the mold core. The slider core fixes the pin during injection molding. The slider core has a preset hole at a corresponding position. The mold also includes a drive mechanism that works with the slider seat. The drive mechanism includes a push rod and a stop block provided on the slider seat. The stop block works with the slider seat through an elastic element, so that the stop block and the push rod can be locked and separated.
[0027] The drive mechanism achieves locking and disengagement states via a push rod and a slider seat. When locked, the drive mechanism can detach the slider seat and slider core from the mold cavity. During disengagement, the drive mechanism is no longer affected by the push rod, allowing other power to be provided for the slider seat and slider core to insert into the mold cavity. This other power can include manual operation or a cylinder. The mechanism can stop if the PIN is deformed and cannot be correctly inserted into the preset hole, preventing the slider seat and slider core from continuing to move into the mold cavity and damaging the PIN. In this case, the deformed PIN (specifically the part that cannot be correctly inserted into the preset hole) can be manually aligned with the preset hole, improving PIN utilization and reducing production costs. Alternatively, the PIN can be directly replaced, but this will result in waste. Furthermore, since the PIN tip can be very close to the preset hole at this time, manual alignment is convenient and does not require extremely high precision. If the preset hole entrance has a guide ramp design, alignment with the guide ramp can greatly increase the probability of the PIN entering the preset hole, eliminating the need for precise alignment and offering high operational tolerance. Other power options can simultaneously detect situations where the PIN pin cannot be correctly inserted into the preset hole, and facilitate PIN pin replacement or assist in aligning the PIN pin with the preset hole.
[0028] Before the part is ejected from the injection mold, the drive mechanism locks the push rod and the stop block, which in turn drives the slide block and the slide core to disengage from the cavity. This prevents the ejector pins from affecting their operation when they are ejected from the part.
[0029] When the push rod and stop are separated: 1) The slider seat and slider core can be manually or otherwise powered to move closer to the pin. For pins that cannot be precisely inserted into the preset hole, the end of the pin can be manually adjusted to guide it into the preset hole. The closer the distance between the preset hole on the slider core and the end of the pin, the more accurate the operation. This avoids the situation where, as with existing systems, the hydraulic cylinder is not separated from the slider seat and directly drives the slider core to the preset position in the cavity without stopping in the middle, which could damage some pins that cannot be precisely inserted into the preset hole. 2) Alternatively, the separation of the slider seat and the drive mechanism can be used to push the slider seat and the pin through other power structures such as cylinders, improving the level of automation and production efficiency.
[0030] In this embodiment, the end of the push rod is provided with a blocking surface, which can hook the stop block and drive the slider seat and slider core to disengage from the cavity.
[0031] In this embodiment, the end of the push rod has a first inclined surface, and the end of the stop block has a second inclined surface that matches the first inclined surface, which facilitates the stop block to cross the first inclined surface and reach the blocking surface position.
[0032] In this embodiment, the driving mechanism further includes a limiting member, which causes the stop block to move to the limiting member and disengage from the push rod. In this embodiment, as... Figure 3 As shown, the limiting member is a U-shaped recessed block with an effective surface being inclined, spanning both sides of the push rod. In other embodiments, it can also be other structures, as long as it can displace the stop block away from the push rod, which falls within the protection scope of this application.
[0033] In this embodiment, the limiting member has a third inclined surface that matches the second inclined surface at the end of the stop block, which facilitates the displacement of the stop block and its disengagement from the push rod.
[0034] In this embodiment, a fixed base is also included. The third inclined surface is directly or indirectly fixed to the fixed base, that is, it remains relatively stationary with respect to the fixed base. When the push rod is working, it generates relative movement with respect to the fixed base.
[0035] In this embodiment, the driving mechanism includes a hydraulic cylinder, which is fixed to a push rod and drives the push rod to move.
[0036] In this embodiment, the hydraulic cylinder is mounted on a fixed base. Those skilled in the art will recognize that in other embodiments, the cylinder can also be mounted on other components of the injection mold, functioning identically to the fixed base, and thus not exceeding the scope of protection of this application.
[0037] In this embodiment, the push rod is provided with a groove, and the blocking surface is located on one side of the groove.
[0038] In this embodiment, the elastic element is a compression spring, with one end of the compression spring mounted on the stop block and the other end mounted on the slider seat, providing a restoring force to the stop block.
[0039] In this embodiment, the driving mechanism includes a cylinder. The slider seat pushes the slider core into a preset position within the cavity via the cylinder. The cylinder resistance ensures that the PIN pin contacts the slider core. However, if the PIN pin cannot be inserted into the preset hole, the resistance to the slider core causes the cylinder to stop. This combination of a slider seat and other structures can detect if the PIN pin cannot be correctly inserted into the preset hole. If so, the cylinder stops, and an alarm or other device can alert the operator to address the issue, such as through manual alignment or other structural assistance. This also avoids the problem of the hydraulic cylinder failing to stop midway, significantly increases the safety of manual alignment, and promotes mold automation, thereby improving production efficiency.
[0040] In this embodiment, the cylinder is fixed on a mounting base.
[0041] It should be noted that, Figure 1 Due to the compact structure, it is not convenient to demonstrate the push rod, so the third inclined plane is not shown. Other components of the injection mold in this embodiment can be used by those skilled in the art according to actual needs, and will not be described in detail here. The slider can be implemented using the concept of this solution and does not exceed the scope of protection of this application. Example 2
[0042] like Figure 5 The injection mold shown is the same as that in Embodiment 1, and will not be described again. The difference is that in this embodiment, there is no cylinder. The slider seat and slider core can be manually pushed. When the end of the PIN pin cannot be aligned with the preset hole, the PIN pin end can be manually aligned and inserted into the preset hole.
[0043] It should be noted that the components used in the above embodiments can be selected or replaced by those skilled in the art according to their needs, without exceeding the scope of protection of this application.
Claims
1. An injection mold comprising a slide mechanism, the slide mechanism comprising a slide core and a slide seat, the slide core is fixed with the slide seat, a PIN is fixed on a mold pin, the slide core fixes the PIN during injection, characterized in that, The slider core is provided with a preset hole, the end of the PIN pin matches the preset hole, and the driving mechanism matched with the slider base is further included, the driving mechanism includes a push rod and a stopper provided on the slider base, and the stopper is matched with the slider base through an elastic element, so that the stopper and the push rod can be in the locked and separated states.
2. The injection mold of claim 1, wherein The end of the push rod is provided with a blocking surface, which can hook the stopper, drive the slider base and the slider core to separate from the cavity.
3. The injection mold of claim 1, wherein, The end of the push rod is provided with a first inclined surface, and the end of the stopper is provided with a second inclined surface matched with the first inclined surface, which can facilitate the stopper to pass over the first inclined surface and reach the blocking surface position.
4. The injection mold of claim 1, wherein, The driving mechanism further includes a limiting piece, and the limiting piece makes the stopper displace to the limiting piece and separate from the push rod.
5. The injection mold of claim 4, wherein, The third inclined surface provided on the limiting piece is matched with the second inclined surface provided on the end of the stopper, so as to displace the stopper and separate from the push rod.
6. The injection mold of claim 5, wherein, The third inclined surface is directly or indirectly matched with the fixing seat, that is, the third inclined surface keeps relative static with the fixing seat, and the push rod generates relative motion with the fixing seat during operation.
7. The injection mold of claim 1, wherein, The driving mechanism includes an oil cylinder, and the oil cylinder drives the push rod to move.
8. The injection mold of claim 2, wherein, The push rod is provided with a sliding groove, and the blocking surface is located on one side of the sliding groove.
9. The injection mold of claim 1, wherein, The elastic element is a compression spring, one end of the compression spring is arranged on the stopper, and the other end of the compression spring is arranged on the slider base.
10. The injection mold of claim 1, wherein, The driving mechanism includes a gas cylinder, the slider base pushes the slider core into the preset position in the cavity through the gas cylinder, the resistance of the gas cylinder meets the PIN pin contacting the slider core, the PIN pin cannot be inserted into the preset hole, the resistance of the slider core makes the gas cylinder stop running.