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 application belongs to the field of mold and its accessory manufacturing, and particularly relates to an injection mold. BACKGROUND

[0002] The mold slider is a special structural component in a forming mold such as an injection mold or a die casting mold, and is mainly used for forming a side hole, a side recess or other complex shapes of non-axial core-pulling in a product. The slider is usually used in cooperation with an inclined guide pillar. During mold closing, the inclined guide pillar pushes the slider into a cavity to form a required side shape; when the product is formed, the mold starts to open, at this time, the inclined guide pillar gradually withdraws and no longer exerts pressure on the slider, and the slider returns to the initial position by means of a reset spring thereon or external power (such as hydraulic pressure), thereby realizing smooth demolding of the product.

[0003] The existing slider is generally provided with a T-shaped groove on a slider seat, and a T-shaped head of a connecting structure is directly hooked to the T-shaped groove of the slider seat, and the slider is directly pushed into and withdrawn from the slider seat by a driving mechanism.

[0004] When the PIN insert is injected, the PIN end needs to be fixed on the mold core, and one end is suspended, but at this time, the suspended part is relatively far away from the fixed position, which deviates from the preset position of the slider docking, and the slider is easily hit when pushed in, which deforms the PIN and has a high production failure rate. Other products similar to the PIN insert also have the above problems.

[0005] Since the slider is directly pushed into the cavity by the driving mechanism, the operator cannot assist the slider or correct the position of the product by hand, and the product is easily damaged during mold closing; if the driving mechanism is not used at all, and the slider is manually pushed in and withdrawn, the pin will hit and damage the slider when the slider is not completely withdrawn, and the production efficiency will be greatly reduced. SUMMARY

[0006] In order to overcome the technical problem that the existing slider is easily hit when pushed in, the purpose of the application is to provide a slider which reduces the risk of damaging the product during production, and the technical scheme is as follows:

[0007] An injection mold comprises a slider, the slider comprises a slider core, a slider seat connected with the slider core, a connecting rod, a driving mechanism,

[0008] The slider seat comprises a bottom plate, a wear plate, a buckle, a spring, a stop block and a positioning pin, the buckle comprises a buckle seat and a buckle head, the buckle head is provided with a limiting column, one end of the spring is connected with the buckle seat, and the other end of the spring is connected with the stop block, and the positioning pin is connected with the buckle on the bottom plate,

[0009] The connecting rod is provided with a hooking structure matched with the buckle head,

[0010] The wear plate is provided with a limiting groove matched with the movement of the limiting column.

[0011] Optionally, the driving mechanism is provided with a fixing seat, and the fixing seat is fixedly connected with the wear plate.

[0012] Optionally, the fixing seat is provided with the limiting groove.

[0013] Optionally, the fixing seat is provided with a travel switch, and a triggering position of the travel switch is matched with a movement position of the bottom plate, so that the travel switch can provide a signal when being triggered, for determining whether the ejector pin can perform an ejection action, to avoid the ejector pin from impacting the sliding block.

[0014] Optionally, the driving mechanism is an oil cylinder.

[0015] Optionally, the chuck head is provided with a first contact surface and a second contact surface, and a chamfer structure is arranged between the first contact surface and the second contact surface.

[0016] Optionally, an included angle α between the first contact surface and the movement direction of the sliding block is less than 30°.

[0017] Optionally, the connecting rod is provided with a third contact surface and a fourth contact surface, and a chamfer structure is arranged between the third contact surface and the fourth contact surface.

[0018] Optionally, the bottom plate is provided with a protruding portion.

[0019] Optionally, the sliding block is provided with a pressing strip, and the pressing strip is fixedly connected with the wear plate.

[0020] Optionally, the sliding block core is fixedly connected with the sliding block seat.

[0021] Optionally, the sliding block seat comprises a shell, and the shell is fixedly connected with the sliding block core.

[0022] Optionally, the limiting groove comprises a first limiting groove, a second limiting groove and a third limiting groove.

[0023] Optionally, the spring is a compression spring, and the compression spring is located on the same side of the chuck as the connecting rod, or the spring is a tension spring, and the tension spring is located on both sides of the chuck as the connecting rod.

[0024] Optionally, the sliding block is provided with a spade base.

[0025] Optionally, the stopper is fixedly installed on the shell, and the stopper is a flat head bolt.

[0026] Compared with the prior art, the application has the beneficial effects that the driving mechanism can be disconnected from the slider seat, when the mold is closed, the slider is moved to the product by other power, such as another driving mechanism with small force or manual pushing, the contact condition of the slider and the product can be observed and adjusted in time, after the slider is reset, the driving mechanism performs a push-in action to realize automatic connection with the slider, and prepares for automatic extraction of the slider for the next mold opening; when the mold is opened, the driving mechanism is locked with the slider, the slider can be automatically extracted, and the phenomenon that the slider is not extracted in time and the product is knocked down by the ejector pin can be avoided. The application can improve the product qualification rate and reduce the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 A slider of the injection mold described in embodiment 1;

[0028] Figure 2 A top view of the slider of the injection mold described in embodiment 1;

[0029] Figure 3 A structure schematic diagram of the slider seat described in embodiment 1;

[0030] Figure 4 A structure schematic diagram of the slider seat described in embodiment 1;

[0031] Figure 5 A structure schematic diagram of the slider seat described in embodiment 1; Figure 4 A local enlarged view of area A in the structure schematic diagram of the slider seat described in embodiment 1;

[0032] Figure 6 A structure schematic diagram of the connecting rod described in embodiment 1;

[0033] Figure 7 A structure schematic diagram of the buckle mechanism described in embodiment 1;

[0034] Figure 8 A structure schematic diagram of the slider of another injection mold described in embodiment 2;

[0035] Figure 9 A structure schematic diagram of the slider of another injection mold described in embodiment 2;

[0036] In the drawings, the reference signs are:

[0037] 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

[0038] 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", and "lower" 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 as long as it does not affect the realization of the structural function, those skilled in the art can set it according to actual needs. Example 1

[0039] like Figures 1-7 The injection mold shown 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 latch 208, a spring 204, a stopper 205, and a positioning pin 206. The latch 208 includes a latch seat 2082 and a latch head 2081. The latch head 2081 is provided with a limiting column 207. One end of the spring 204 is connected to the latch seat 2082, and the other end is connected to the stopper 205. The positioning pin 206 pins the latch 208 to the base plate 202. Under the positioning action of the positioning pin 206, the latch 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 latch 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.

[0040] In the embodiment, the driving mechanism 5 is provided with a fixed seat 6, which is fixedly connected with the wear-resistant plate 203. The fixed seat 6 is provided with a limiting groove 3. According to different strokes of the sliding block, the stroke of the limiting column 207 is also different. Thus, the limiting groove 3 can also be arranged on the fixed seat 6 to ensure the operation of the sliding block. The fixed seat 6 is provided with a stroke switch 7. In the process of mold opening, the bottom plate 202 is withdrawn and then retracted with the driving mechanism 5 driving the connecting rod 4. When the bottom plate 202 touches the stroke switch 7, the injection molding machine receives the signal of the stroke switch 7 and controls the ejector pin to be ejected. At this time, the sliding block has completely exited, avoiding the phenomenon that the ejector pin is ejected and the sliding block is damaged. The driving mechanism 5 is an oil cylinder.

[0041] In the embodiment, the buckle head 2081 is provided with a first contact surface 2083 and a second contact surface 2084. The first contact surface 2083 and the second contact surface 2084 are provided with a chamfer structure. The angle α between the first contact surface 2083 and the sliding direction is less than 30°. The connecting rod 4 is provided with a third contact surface 401 and a fourth contact surface 402. The third contact surface 401 and the fourth contact surface 402 are provided with a chamfer structure. In the process of mold opening, when the buckle head 2081 and the connecting rod 4 are gradually separated, that is, the limiting column 207 moves from the second limiting groove 302 to the third limiting groove 303, the contact area between the second contact surface 2084 and the third contact surface 401 gradually decreases with the movement. However, the force is still acting on the two contact surfaces. When reaching the limit distance, in order to prevent the damage of the workpiece, the chamfer structure is arranged at the limit distance of the two contact surfaces, which greatly reduces the friction loss.

[0042] In the embodiment, the bottom plate 202 is provided with a protruding part 2021, and the sliding block seat 2 is provided with a pressing strip 8, which is fixedly connected with the wear-resistant plate 203. The protruding part 2021 is between the wear-resistant plate 203 and the pressing strip 8. The pressing strip 8 and the wear-resistant plate 203 cooperate with each other to define the movement track of the sliding block.

[0043] In the embodiment, the sliding block core 1 is fixedly connected with the sliding block seat 2. The sliding block seat 2 includes a shell 201, which is fixedly connected with the sliding block core 1.

[0044] In the embodiment, the limiting groove 3 includes a first limiting groove 301, a second limiting groove 302, and a third limiting groove 303. The first limiting groove 301 functions as an avoiding part. After the sliding block is manually pushed in, the connecting rod 4 needs to be continuously pushed in to form a hooking state with the buckle machine 208 under the pushing of the oil cylinder, so as to prepare for the next working stage of pulling out. When the connecting rod 4 is pushed in to contact the buckle machine head 2081, the buckle machine head 2081 needs to swing to allow the connecting rod 4 to continue to push in. The limiting column 207 swings with the swing of the buckle machine head 2081. In order to not hinder the pushing in of the connecting rod 4, the limiting column 207 needs to swing in the first limiting groove 301. The lengths of the second limiting groove 302 and the third limiting groove 303 can be determined by the actual production needs of those skilled in the art.

[0045] In the embodiment, the spring 204 is a compression spring, which is located on the same side of the buckle machine 208 as the connecting rod 4. The spring 204 is arranged to enable the buckle machine 208 to swing under the positioning of the positioning pin 206.

[0046] In the embodiment, the stopper 205 is fixedly installed on the shell 201. The stopper 205 is a flat head bolt. Due to the limitation of the structure of the workpiece, the flat head bolt is suitable for the spring 204 to be pressed for a long distance, so as to facilitate the swing of the buckle machine 208 to play a connecting role with the connecting rod 4.

[0047] The working principle of the sliding block in the embodiment is as follows:

[0048] The buckle machine 208 can swing within a certain range through the intermediate positioning pin 206 and the sliding block seat 2. The headless bolt presses the spring 204 to generate an acting force on the buckle machine 208, so that the buckle machine 208 is hooked with the oil cylinder connecting rod 4 under the action of the force. The limiting groove 3 is arranged on the wear-resistant plate 203 and the fixed seat 6. The limiting column 207 is arranged on the buckle machine head 2081. The limiting column 207 slides in the limiting groove 3.

[0049] When the mold is opened, the slider needs to be pulled out. Since the spring 204 presses against the buckle machine base 2082, the buckle machine base 2082 is hooked with the connecting rod 4. At this time, the buckle machine 208 is rigidly connected to the connecting rod 4, and 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, and the limiting post 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 it out backward, and the slider core 1 continues to move backward. At this time, the limiting post 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 becomes smaller, and gradually separates from the connecting rod 4. After continuing to run for a distance, the bottom plate 202 touches the travel 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 retracts into the fixed seat 6. On the other hand, the injection molding machine will perform the ejector ejection action upon receiving the signal from the travel switch 7, thereby avoiding the risk of the ejector hitting the slider.

[0050] When closing the mold, the slider needs to be pushed in. As 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 is 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 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 affected 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.

[0051] It should be noted that, the other components of the injection mold in this embodiment can be used in combination by those skilled in the art according to actual needs, and no further details will be given. The slider can adopt the idea of ​​this solution and does not exceed the scope of protection of this application. Example 2

[0052] like Figure 8 The slider of another injection mold shown is the same as that of Example 1 and will not be repeated here. 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 tightening the slider. Example 3

[0053] The same parts as in example 2 are not described again, the difference is that the spring 204 is a tension spring, which is located on both sides of the buckle machine 208 with the connecting rod 4, so that the buckle machine 208 can swing under the positioning of the positioning pin 206. Example 4

[0054] As Figure 9 Another kind of injection mold slider is shown, the same parts as in example 1 are not described again, the difference is that a cylinder 501 is arranged on the fixed seat 6, when the mold is opened, the connecting rod 4 is separated from the buckle machine seat 208, the detailed working process has been described in example 1, at this time the cylinder 501 drives the slider seat 2 to move to the product, usually the acting force of the cylinder 501 is much smaller than the driving mechanism 5, so the problem of product crash caused by directly pushing the slider by the driving mechanism 5 can be avoided.

[0055] It should be noted that the components used in the above examples can be selected or replaced by those skilled in the art according to the needs, without exceeding the scope of the present application.

Claims

1. An injection mold comprising a slider, the slider comprising a slider core, a slider seat connected with the slider core, a connecting rod, a driving mechanism, characterized in that, the slider seat comprises a bottom plate, a wear plate, a buckle machine, a spring, a stop block, a positioning pin, the buckle machine comprises a buckle machine seat and a buckle machine head, the buckle machine head is provided with a limiting column, one end of the spring is connected with the buckle machine seat, and the other end of the spring is connected with the stop block, and the positioning pin is connected with the buckle machine on the bottom plate, the connecting rod is provided with a hook connection structure matched with the buckle machine head, the wear plate is provided with a limiting groove matched with the movement of the limiting column.

2. The injection mold of claim 1, wherein The driving mechanism is provided with a fixing seat, and the fixing seat is fixedly connected with the wear plate.

3. The injection mold of claim 2, wherein, The fixing seat is provided with the limiting groove.

4. The injection mold of claim 2, wherein The fixing seat is provided with a travel switch, and the triggering position of the travel switch is matched with the movement position of the bottom plate, so that the travel switch can provide a signal when being triggered, for determining whether the ejector pin can perform an ejecting action, and avoiding the ejector pin from impacting the slider.

5. The injection mold of claim 1, wherein, The driving mechanism is an oil cylinder.

6. The injection mold of claim 1, wherein, The buckle machine head is provided with a first contact surface and a second contact surface, and a chamfer structure is arranged between the first contact surface and the second contact surface.

7. The injection mold of claim 6, wherein The included angle α between the first contact surface and the movement direction of the slider is less than 30°.

8. The injection mold of claim 1, wherein, The connecting rod is provided with a third contact surface and a fourth contact surface, and a chamfer structure is arranged between the third contact surface and the fourth contact surface.

9. The injection mold of claim 1, wherein, The bottom plate is provided with a protruding portion.

10. The injection mold of claim 1, wherein, The slider is provided with a pressing strip, and the pressing strip is fixedly connected with the wear plate.

11. The injection mold of claim 1, wherein, The slider core is fixedly connected with the slider seat.

12. The injection mold of claim 1, wherein, The slider seat comprises a shell, and the shell is fixedly connected with the slider core.

13. The injection mold of claim 1, wherein, The limiting groove comprises a first limiting groove, a second limiting groove and a third limiting groove.

14. The injection mold of claim 1, wherein, The spring is a compression spring, and the compression spring is located on the same side of the buckle machine as the connecting rod, or the spring is a tension spring, and the tension spring is located on both sides of the buckle machine as the connecting rod.

15. The injection mold of claim 1, wherein, The slider is provided with a spade base.

16. The injection mold of claim 12, wherein, The stop block is fixedly installed on the shell, and the stop block is a flat head bolt.

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