Injection mold

Abstract

The injection mold comprises a sliding block, the sliding block comprises a sliding block mold core, a sliding block base connected with the sliding block mold core, a connecting rod and a driving mechanism, the sliding block base comprises a bottom plate, a wear-resisting plate, a buckling machine, a spring, a check block and a positioning pin, the buckling machine comprises a buckling machine base and a buckling machine head, and the buckling machine head is provided with a limiting column. One end of the spring is connected with the buckling machine base, the other end of the spring is connected with the check block, the buckling machine is in pin connection with the bottom plate through the positioning pin, the connecting rod is provided with a hooking structure matched with the buckling machine head, and the wear-resisting plate is provided with a limiting groove matched with the limiting column to move. The contact condition of the sliding block and a workpiece can be observed and adjusted in time, and after the sliding block is reset, the driving mechanism conducts pushing-in action to achieve automatic connection with the sliding block; when the mold is opened, the driving mechanism and the sliding block are locked, so that the sliding block can be automatically pulled out, the phenomenon that the sliding block is crashed due to the fact that the ejector pin ejects out a product when the sliding block is not pulled out in time is avoided, the product percent of pass is improved, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of mold and its accessories manufacturing, and specifically to an injection mold. Background Art

[0002] The mold slider is a special structural component in the molding molds such as injection molds and die-casting molds. It is mainly used to mold the side holes, side recesses or other complex shapes of non-axial core pulling inside the molded products. The slider is usually used in conjunction with the inclined guide pin. During the mold closing process, the inclined guide pin pushes the slider into the cavity to form the required side shape; when the product is formed, the mold begins to open, and the inclined guide pin will gradually withdraw and no longer exert pressure on the slider. The slider relies on the return spring or external power (such as hydraulic pressure) on it to return to the initial position, thereby achieving smooth demolding of the product.

[0003] The existing slider generally has a "T"-shaped groove on the slider seat, and the "T"-shaped head of the connecting structure is directly connected to the "T"-shaped groove of the slider seat, and the slider is directly pushed in and out by the driving mechanism. When injection molding PIN inserts, the PIN pin end needs to be fixed on the mold core, with one end suspended in the air. However, the suspended part is relatively far from the fixed position and will deviate from the preset position for docking with the slider. When the slider is pushed in, it is very easy to hit the PIN pin and deform it, resulting in a high production defect rate. Other products similar to PIN inserts also have the above problems.

[0004] Since the driving mechanism directly pushes the slider into the cavity, the operator cannot use his hands to assist the slider or correct the position of the product, which can easily damage the product during the mold closing process. If the driving mechanism is not used at all and the slider is pushed in and pulled out manually, the ejector may be ejected and damage the slider when the slider is not fully pulled out, and the production efficiency will be greatly reduced. Summary of the invention

[0005] In order to overcome the technical problem that the existing slider is easy to crash the workpiece when pushed in, the purpose of this application is to provide a slider that reduces the risk of crashing the workpiece during the production process, which is specifically achieved through the following technical solutions: An injection mold includes a slider, wherein the slider includes a slider core, a slider seat connected to the slider core, a connecting rod, and a driving mechanism. The slider seat includes a bottom plate, a wear-resistant plate, a locking machine, a spring, a stopper, and a positioning pin. The locking machine includes a locking machine seat and a locking machine head. The locking machine head is provided with a limit column. One end of the spring is connected to the locking machine seat, and the other end is connected to the stopper. The positioning pin connects the locking machine pin to the bottom plate. The connecting rod is provided with a hooking structure matching the buckle head. The wear-resistant plate is provided with a limiting groove for cooperating with the movement of the limiting column.

[0006] Optionally, the driving mechanism is provided with a fixed seat, and the fixed seat is fixedly connected to the wear-resistant plate.

[0007] Optionally, the limiting groove is provided on the fixing seat.

[0008] Optionally, a travel switch is provided on the fixing seat, and a trigger position of the travel switch matches a movement position of the base plate, so that when the travel switch is triggered, a signal can be provided to determine whether the ejector can perform an ejection action, thereby preventing the ejector from hitting the slider.

[0009] Optionally, the driving mechanism is a cylinder.

[0010] Optionally, the buckle head is provided with a first contact surface and a second contact surface, and a chamfer structure is provided between the first contact surface and the second contact surface.

[0011] Optionally, an angle α between the first contact surface and the movement direction of the slider is less than 30°.

[0012] Optionally, the connecting rod is provided with a third contact surface and a fourth contact surface, and a chamfer structure is provided between the third contact surface and the fourth contact surface.

[0013] Optionally, the base plate is provided with a protrusion.

[0014] Optionally, the slider is provided with a pressure strip, and the pressure strip is fixedly connected to the wear-resistant plate.

[0015] Optionally, the slider core is fixedly connected to the slider seat.

[0016] Optionally, the slider seat includes a shell, and the shell is fixedly connected to the slider core.

[0017] Optionally, the limiting groove includes a first limiting groove, a second limiting groove, and a third limiting groove.

[0018] Optionally, the spring is a compression spring, and the compression spring and the connecting rod are located on the same side of the trigger, or the spring is a tension spring, and the tension spring and the connecting rod are located on both sides of the trigger.

[0019] Optionally, the sliding block is provided with a shovel base.

[0020] Optionally, the stopper is fixedly mounted on the shell, and the stopper is a flat head bolt.

[0021] Compared with the prior art, the present application has the following beneficial effects: the drive mechanism and the slider seat can be disengaged. When the mold is closed, the slider is moved toward the workpiece by other power, such as another drive mechanism with less force or manual push, so that the contact between the slider and the workpiece can be observed and adjusted in time. After the slider is reset, the drive mechanism pushes in to achieve automatic connection with the slider, preparing for the automatic withdrawal of the slider when the mold is opened next time; when the mold is opened, the drive mechanism and the slider are locked, so that the slider can be automatically withdrawn, avoiding the phenomenon that the slider is not withdrawn in time and the ejector ejects the product and crashes the slider. The present application can improve the product qualification rate and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of a slider of the injection mold described in Example 1; Figure 2 A top view of a slider of the injection mold described in Example 1; Figure 3 This is a schematic diagram of the structure of the slider seat described in Example 1; Figure 4 This is a schematic diagram of the internal structure of the slider seat described in Example 1; Figure 5 for Figure 4 A partial enlarged view of the middle A area; Figure 6 This is a schematic diagram of the connecting rod structure described in Example 1; Figure 7 This is a schematic diagram of the buckle structure described in Example 1; Figure 8 A schematic diagram of a slider of another injection mold described in Example 2; Fig. 9 This is a schematic diagram of a slider of the injection mold described in Example 4; In the figure, the reference numerals are: 1-slider core, 2-slider seat, 201-housing, 202-bottom plate, 2021-protrusion, 203-wear-resistant plate, 204-spring, 205-stopper, 206-locating pin, 207-limiting column, 208-clip machine, 2081-clip machine head, 2082-clip machine seat, 2083-first contact surface, 2084-second contact surface, 3-limiting groove, 301-first limiting groove, 302-second limiting groove, 303-third limiting groove, 4-connecting rod, 401-third contact surface, 402-fourth contact surface, 5-driving mechanism, 501-cylinder, 6-fixed seat, 7-travel switch, 8-pressure strip, 9-shovel base. DETAILED DESCRIPTION

[0023] The specific implementation methods of the present application are described in detail below through examples. It should be noted that the words and directional nouns such as "first", "second", "third", "fourth", "upper", "lower" and so on in the present application are only used as a way to describe the structure, and are not limitations on the technical solution of the present application. Those skilled in the art should understand that "fixed" or "fixed connection" in the present application includes direct fixation and indirect fixation, and those skilled in the art can set it according to actual needs as long as it does not affect the realization of the structural function. Example

[0024] like Figure 1 to Figure 7 An injection mold shown in the figure includes a slider, which includes a slider core 1, a slider seat 2 connected to the slider core 1, a connecting rod 4, and a driving mechanism 5. The slider seat 2 includes a base plate 202, a wear-resistant plate 203, a buckle machine 208, a spring 204, a stopper 205, and a positioning pin 206. The buckle machine 208 includes a buckle machine seat 2082 and a buckle machine head 2081. The buckle machine head 2081 is provided with a limiting column 207. One end of the spring 204 is connected to the buckle machine seat 2082, and the other end is connected to the stopper 205. The positioning pin 206 pins the buckle machine 208 to the base plate 202. Under the positioning action of the positioning pin 206, the buckle machine 208 does not undergo relative displacement with the positioning pin 206, and only swings within the vertical plane of the positioning pin 206. The connecting rod 4 is provided with a hooking structure matching the buckle machine head 2081, and the wear-resistant plate 203 is provided with a limiting groove 3 for cooperating with the movement of the limiting column 207.

[0025] In this embodiment, the driving mechanism 5 is provided with a fixed seat 6, and the fixed seat 6 is fixedly connected to the wear-resistant plate 203. The fixed seat 6 is provided with a limit groove 3. According to the different strokes of the movement of the slider, the movement stroke of the limit column 207 is also different. Therefore, the limit groove 3 can also be set on the fixed seat 6 to ensure the operation of the slider. The fixed seat 6 is provided with a travel switch 7. During the mold opening process, the bottom plate 202 retreats as the driving mechanism 5 drives the connecting rod 4 to be pulled out. When the bottom plate 202 touches the travel switch 7, the injection molding machine receives the signal of the travel switch 7 and controls the ejector to be ejected. At this time, the slider has been completely withdrawn, avoiding the phenomenon that the ejector is ejected and hits the slider. The driving mechanism 5 is a cylinder.

[0026] In this embodiment, the buckle head 2081 is provided with a first contact surface 2083 and a second contact surface 2084, a chamfer structure is provided between the first contact surface 2083 and the second contact surface 2084, the angle α between the first contact surface 2083 and the movement direction of the slider is less than 30°, the connecting rod 4 is provided with a third contact surface 401 and a fourth contact surface 402, a chamfer structure is provided between the third contact surface 401 and the fourth contact surface 402, and during the mold opening process, when the buckle head 2081 and the connecting rod 4 are gradually separated, that is, the limiting column 207 is transferred from the second limiting groove 302 to the third limiting groove 303 for movement, as the movement proceeds, the contact area between the second contact surface 2084 and the third contact surface 401 gradually decreases, but the force still acts on the two contact surfaces. When the limit distance is reached, in order to prevent damage to the workpiece, a chamfer structure is provided at the limit distance of the two contact surfaces, which greatly reduces the friction loss.

[0027] In this embodiment, the bottom plate 202 is provided with a protrusion 2021, and the slider seat 2 is provided with a pressure strip 8, which is fixedly connected to the wear-resistant plate 203. The protrusion 2021 is located between the wear-resistant plate 203 and the pressure strip 8, and the pressure strip 8 and the wear-resistant plate 203 cooperate with each other to limit the movement trajectory of the slider.

[0028] In this embodiment, the slider core 1 is fixedly connected to the slider seat 2 , and the slider seat 2 includes a shell 201 , and the shell 201 is fixedly connected to the slider core 1 .

[0029] In this embodiment, the limit groove 3 includes a first limit groove 301, a second limit groove 302, and a third limit groove 303, wherein the first limit groove 301 plays a role of avoidance. After the slider is manually pushed in, the connecting rod 4 needs to continue to be pushed in under the push of the cylinder to form a hooked state with the buckle machine 208, preparing for the extraction in the next working stage. When the connecting rod 4 is pushed in and contacts the buckle machine head 2081, the buckle machine head 2081 needs to swing to allow the connecting rod 4 to continue to be pushed in, and the limit column 207 swings with the swing of the buckle machine head 2081. In order not to hinder the pushing of the connecting rod 4, the limit column 207 needs a swinging space in the first limit groove 301, wherein the lengths of the second limit groove 302 and the third limit groove 303 can be determined by technicians in this field according to actual production needs.

[0030] In this embodiment, the spring 204 is a compression spring, and the compression spring and the connecting rod 4 are located on the same side of the trigger 208. The arrangement of the spring 204 enables the trigger 208 to swing while being positioned by the positioning pin 206.

[0031] In this embodiment, the stopper 205 is fixedly mounted on the housing 201. The stopper 205 is a flat head bolt. Due to the limitation of the spatial structure of the component, the flat head bolt is used to allow the spring 204 to be squeezed over a longer distance, making it easier for the trigger 208 to swing and connect with the connecting rod 4.

[0032] Here is how the slider works in this example: The latch machine 208 is connected to the slider seat 2 via the middle positioning pin 206 and can swing to a certain extent. The headless bolt compression spring 204 generates a force on the latch machine 208, so that the latch machine 208 is hooked to the cylinder connecting rod 4 under the action of the force. A limiting groove 3 is provided on the wear-resistant plate 203 and the fixed seat 6. A limiting column 207 is provided on the latch machine head 2081, and the limiting column 207 slides in the limiting groove 3.

[0033] When the mold is opened, the slider needs to be pulled out. Since the spring 204 supports the buckle seat 2082, the buckle seat 2082 is hooked with the connecting rod 4. At this time, the buckle 208 is rigidly connected with the connecting rod 4. The slider core 1 is pulled out backward under the force of the cylinder. When the slider core 1 is pulled out a certain distance, the slider has completely separated from the product. The limiting column 207 just reaches the connection between the second limiting groove 302 and the third limiting groove 303. The driving mechanism 5 continues to apply the force of pulling out backward, and the slider core 1 continues to move backward. At this time, the limiting column 207 enters the third limiting groove 30 3. The stroke gradually deviates from the original straight line of movement. The latch 208 is gradually opened at this time, that is, the area of ​​the second contact surface 2084 and the third contact surface 401 gradually decreases, and the latch 208 gradually separates from the connecting rod 4. After continuing to run for a distance, the bottom plate 202 touches the stroke switch 7, and the slider core 1 no longer moves backward. In other words, the latch 208 is completely separated from the connecting rod 4. The connecting rod 4 continues to retreat under the action of the cylinder until it is retracted into the fixed seat 6. On the other hand, the injection molding machine receives the signal from the stroke switch 7 and performs the ejector ejection action, thereby avoiding the risk of the ejector hitting the slider.

[0034] When the mold is closed, the slider needs to be pushed in. As the work in the mold opening stage is completed, the connecting rod 4 is completely separated from the buckle machine 208. Without the effect of the cylinder force, the slider can be easily pushed in manually, and the slider core 1 and the base plate 202 return along the original extraction path. The limiting column 207 also returns from the third limiting groove 303 to the first limiting groove 301 along with the movement of the base plate 202, until the slider core 1 and the product are completely reset and fit. Specifically, in this embodiment, the angle α between the first contact surface 2083 and the movement direction of the slider is less than 30°. In other embodiments, as long as the cylinder can drive the connecting rod 4 to push forward, the connecting rod 4 gradually approaches and squeezes the buckle machine head 2081 so that the buckle machine head 2081 swings open at a certain angle to reach the final position. After the buckle machine head 2081 swings open, it is acted upon by the force of the spring 204 and quickly returns to its position to hook the connecting rod 4, that is, the second contact surface 2084 contacts the third contact surface 401.

[0035] It should be noted that the 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. The slider can adopt the concept of this solution and does not exceed the protection scope of this application. Example

[0036] like Figure 8 Another type of slider of the injection mold shown in the figure will not be repeated in detail for the parts that are the same as those in Example 1. The difference is that, in this embodiment, a shovel base 9 is provided on the top of the slider seat 2, and the contact surface between the shovel base 9 and the slider seat 2 is an inclined plane. The shovel base 9 drives the slider seat 2 to move when the mold is closed, thereby playing the role of tightening the slider. Example

[0037] The parts of this embodiment that are the same as those of Embodiment 2 will not be repeated herein, except that the spring 204 is a tension spring, and the tension spring and the connecting rod 4 are located on both sides of the latch 208, so that the latch 208 can swing simultaneously under the positioning of the positioning pin 206. Example

[0038] like Fig. 9 Another type of slider of the injection mold shown is not described in detail with respect to the parts that are the same as those in Example 1. The difference is that a cylinder 501 is provided on the fixed seat 6. After the mold is opened, the connecting rod 4 is separated from the locking seat 208. The detailed working process has been described in Example 1. At this time, the cylinder 501 pushes the slider seat 2 to move to the workpiece. Normally, the force of the cylinder 501 is much smaller than that of the driving mechanism 5. Therefore, the problem of the workpiece being damaged by the slider being directly pushed by the driving mechanism 5 can be avoided.

[0039] 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 protection scope of this application.

Claims

1. An injection mold, comprising a slider, wherein the slider comprises a slider core, a slider seat connected to the slider core, a connecting rod, and a driving mechanism, wherein: The slider seat includes a base plate, a wear-resistant plate, a latch machine, a spring, a stopper, and a positioning pin. The latch machine includes a latch machine base and a latch machine head. The latch machine head is provided with a limit column. One end of the spring is connected to the latch machine base, and the other end is connected to the stopper. The positioning pin connects the latch machine pin to the base plate. The connecting rod is provided with a hooking structure matching the latch machine head, and the wear-resistant plate is provided with a limit groove that cooperates with the movement of the limit column.

2. The injection mold according to claim 1, characterized in that: The driving mechanism is provided with a fixing seat, and the fixing seat is fixedly connected to the wear-resistant plate.

3. The injection mold according to claim 2, characterized in that: The fixing seat is provided with the limiting groove.

4. The injection mold according to claim 2, characterized in that: The fixing seat is provided with a travel switch, and the triggering position of the travel switch matches the moving position of the bottom plate, so that when the travel switch is triggered, a signal can be provided to determine whether the ejector can perform an ejection action, thereby preventing the ejector from hitting the slider.

5. The injection mold according to claim 1, characterized in that: The driving mechanism is a cylinder.

6. The injection mold according to claim 1, characterized in that: The buckle head is provided with a first contact surface and a second contact surface, and a chamfer structure is provided between the first contact surface and the second contact surface.

7. The injection mold according to claim 6, characterized in that: The included angle α between the first contact surface and the moving direction of the slider is less than 30°.

8. The injection mold according to claim 1, characterized in that: The connecting rod is provided with a third contact surface and a fourth contact surface, and a chamfer structure is provided between the third contact surface and the fourth contact surface.

9. The injection mold according to claim 1, characterized in that: The bottom plate is provided with a protrusion.

10. The injection mold according to claim 1, characterized in that: The slide block is provided with a pressure strip, and the pressure strip is fixedly connected to the wear-resistant plate.

11. The injection mold according to claim 1, characterized in that: The slider core is fixedly connected to the slider seat.

12. The injection mold according to claim 1, characterized in that: The slider seat comprises a shell, and the shell is fixedly connected to the slider core.

13. The injection mold according to claim 1, characterized in that: The limiting grooves include a first limiting groove, a second limiting groove, and a third limiting groove.

14. The injection mold according to claim 1, characterized in that: The spring is a compression spring, and the compression spring and the connecting rod are located on the same side of the trigger, or the spring is a tension spring, and the tension spring and the connecting rod are located on both sides of the trigger.

15. The injection mold according to claim 1, characterized in that: The sliding block is provided with a shovel base.

16. The injection mold according to claim 12, characterized in that: The stopper is fixedly mounted on the housing, and the stopper is a flat head bolt.

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