A high-precision machining quick-change structure

Abstract

The present invention relates to the field of mold core pulling equipment, and specifically to a high-precision processing quick-change structure, including a slide seat, the slide seat is connected to a slider, a core pulling device is arranged in the slider, an oblique pulling hole is opened in the slider, a core pulling sleeve is arranged in the oblique pulling hole, an anti-retraction screw for preventing the core pulling sleeve from retreating is threadedly connected in the oblique pulling hole, a core pulling drive assembly is arranged on the slide seat, the core pulling device is detachably connected to the core pulling drive assembly, and the anti-retraction screw and the core pulling sleeve are sleeved on the core pulling device. The present invention can effectively prevent product breakage, realize quick change of core pulling, and facilitate mold processing.

Description

Technical Field

[0001] The invention relates to the field of mold core pulling equipment, and in particular to a high-precision processing quick-change structure. Background Art

[0002] The core puller is a key component in mold design, used to mold complex internal or lateral geometric features of the product. It is mainly used to solve structures that cannot be completed by simple mold opening and closing actions, such as side holes, side recesses, undercuts, etc. The working principle of the core puller is that when the mold is closed, the core puller is pushed into the mold cavity through the drive mechanism to participate in the molding process of the product; and before the mold is opened, the core puller must be pulled out of the product first to ensure that the product can be demolded smoothly.

[0003] Some existing core pulling structures, such as a slider core pulling structure with a back-pulling function (patent publication number CN109332640A; application date: August 27, 2018), have a core pulling structure fixed on a core pulling fixing plate through a hanging table. However, in actual applications, this structure has certain defects: during the molding process, the core pulling sleeve is prone to backsliding, which not only causes a break on the product surface, but may also affect the dimensional accuracy and appearance quality of the final product. Specifically, when the mold is closed for die casting, if the core pulling sleeve cannot be firmly maintained in the predetermined position, but produces a slight displacement under the action of the injection pressure, it will cause the molding surface to be inconsistent with expectations, thereby causing product quality problems. Summary of the invention

[0004] The present invention aims to provide a high-precision machining quick-change structure to solve the problem in the prior art that the core pulling sleeve is easy to retreat, thus affecting the product molding quality.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme:

[0006] A high-precision machining quick-change structure comprises a slide seat, the slide seat is connected to a slider, a core pulling device is arranged in the slider, an oblique pulling hole is opened in the slider, a core pulling sleeve is arranged in the oblique pulling hole, an anti-retraction screw for preventing the core pulling sleeve from retreating is threadedly connected in the oblique pulling hole, a core pulling drive assembly is arranged on the slide seat, the core pulling device is detachably connected to the core pulling drive assembly, and the anti-retraction screw and the core pulling sleeve are arranged on the core pulling device.

[0007] Preferably, as an improvement, a sleeve is detachably provided in the oblique withdrawal hole, and the anti-retraction screw is threadedly connected in the sleeve.

[0008] Preferably, as an improvement, a sleeve hanging platform is provided at the top of the sleeve, and the end of the inclined hole is connected to a sleeve hanging platform hole for limiting the sleeve hanging platform. The sleeve can be detachably installed in the sliding block through the sleeve hanging platform and the sleeve hanging platform hole, and the end of the sleeve hanging platform is against the sliding seat when the sleeve is installed in the sliding block.

[0009] Preferably, as an improvement, a rotation-stopping surface is provided on the inner wall of the hole of the insert sleeve hanging platform, and a rotation-stopping mating surface mating with the rotation-stopping surface is provided on the side wall of the insert sleeve hanging platform.

[0010] Preferably, as an improvement, a core pulling sleeve hanging platform is provided at the top of the core pulling sleeve, and a core pulling sleeve limiting step for limiting the core pulling sleeve hanging platform is provided at the bottom end of the inclined pulling hole.

[0011] Preferably, as an improvement, the core pulling drive assembly includes a cylinder, the output shaft of the cylinder is connected to a mounting block, a plurality of connecting rods are fixed on the mounting block, and the connecting rods are detachably connected to the core pulling.

[0012] Preferably, as an improvement, the interior of the connecting rod is hollow, a core pulling hanging platform is provided at the top of the core pulling, a core pulling limiting step for limiting the core pulling hanging platform is provided at the bottom of the connecting rod, a core pulling blocking rod for tightening the core pulling is provided inside the connecting rod, and the core pulling is slidably inserted into the anti-retraction screw and the core pulling sleeve.

[0013] Preferably, as an improvement, the oblique extraction hole is connected to a drainage channel, and the drainage channel extends to the outside of the cavity.

[0014] Preferably, as an improvement, the sliding seat and the sliding block are detachably connected.

[0015] The principles and advantages of this solution are:

[0016] 1. When closing the mold, the external power drives the slide and the slider to move toward the cavity as a whole. The core pulling sleeve moves into place with the slider, and the core pulling drive assembly drives the core pulling to slide further toward the cavity in the core pulling sleeve to participate in product molding. When opening the mold, the core pulling drive assembly first pulls out the core, and the external power then withdraws the slide and the slider as a whole. This solution fixes the anti-retraction screw at the rear end of the core pulling sleeve, and the core pulling is inserted into the anti-retraction screw and the core pulling sleeve. The anti-retraction screw is used to limit the core pulling sleeve during the molding process, which can effectively prevent the core pulling sleeve from retreating and ensure product quality. After practical comparison, the product after adopting this solution no longer has a break due to the retreat of the core pulling sleeve, which is convenient for subsequent secondary processing, reduces the difficulty of secondary processing, improves the efficiency of secondary processing, and ensures product quality.

[0017] During the research and development process, the inventors have conducted numerous experiments and tried several other methods to solve the problem of product breakage, such as adding an anti-retreat structure to the slider. In practice, it is found that this method can prevent product breakage to a certain extent in the initial stage, but as the use time increases, the anti-retreat effect of the slider decreases, and some products still have breakage problems. After analysis and summary, the slider is anti-retreat, but due to its large weight and volume, the anti-retreat structure has poor durability and increases the equipment cost. However, with this solution, only a small anti-retreat screw is added to the rear end of the core pulling sleeve. After sample testing, it can not only prevent the core pulling sleeve from retreating, but also does not affect the installation of the core pulling, and does not increase the volume of the slider. It has good durability and low maintenance cost.

[0018] However, during the actual production process of the mold, the inventor encountered a new problem. Since the anti-retraction screw is directly threaded in the oblique withdrawal hole, and the oblique withdrawal hole needs to enter the oblique withdrawal hole from the side of the slider away from the cavity to process the internal thread that matches the anti-retraction screw, but the position of the internal thread is deep, and it is difficult for existing tools to enter the deep hole position to process the internal thread. Even if a tool is entered to complete the processing, when the mold is put into use, it is found that the internal thread of the anti-retraction screw and the oblique withdrawal hole is not accurate enough, resulting in poor anti-retraction locking effect of the core pulling sleeve, and the product will still have a small amount of breakage problem. However, by adopting this solution, by adding a sleeve in the oblique withdrawal hole to fix the anti-retraction screw, the thread processing surface is transferred to the sleeve, and the internal thread can be processed from the other end of the sleeve. The deep hole thread processing of the oblique withdrawal hole is cleverly transformed into the shallow hole thread processing of the sleeve, which solves the problem of difficulty in thread processing. On the basis of smooth installation of the anti-retraction screw, the installation accuracy of the anti-retraction screw is also guaranteed, thereby ensuring the processing quality of the product.

[0019] 2. This solution can also realize quick replacement of core pulling. Specifically, the core pulling sleeve is hung in the insert sleeve through the core pulling sleeve hanging platform, and then tightened by the anti-retraction screw; at the same time, the core pulling is hung in the connecting rod through the core pulling hanging platform and passes through the anti-retraction screw and the core pulling sleeve, and then tightened by the core pulling blocking rod; the insert sleeve is hung in the insert sleeve hanging platform hole at the end of the inclined hole through the insert sleeve hanging platform, and then fixed by the end against the slide seat. With this design, when replacing the core pulling, the oil cylinder only needs to pull out the connecting rod through the mounting block to directly pull out the core pulling, and the core pulling can be quickly replaced without removing the mold.

[0020] This solution can also realize quick replacement of the core pulling sleeve, anti-retraction screw and insert sleeve. Specifically, after separating the slide block, the insert sleeve, anti-retraction screw and core pulling sleeve can be directly taken out to realize quick replacement of the core pulling sleeve, anti-retraction screw and insert sleeve. In addition, this solution can also realize quick replacement of the core pulling sleeve alone. After pulling out the core, unscrew the anti-retraction screw, and the core pulling sleeve can be taken out to complete the quick replacement of the core pulling sleeve. In summary, compared with the prior art, this solution can not only realize quick replacement of the core pulling, but also quick replacement of the insert sleeve, core pulling sleeve and anti-retraction screw, which is convenient for maintenance and reduces maintenance costs.

[0021] 3. The anti-rotation surface and the anti-rotation mating surface are respectively arranged on the sleeve hanging table hole and the sleeve hanging table, which can effectively prevent the sleeve from rotating during the molding process, thereby further ensuring the stability of the core pulling sleeve, further avoiding the loosening of the core pulling sleeve, and ensuring the product quality.

[0022] 4. This solution sets up a mounting block to install multiple core pulling structures, which can complete the core pulling of multiple parts at the same time and improve the processing efficiency.

[0023] 5. This solution connects the drainage channel to the oblique pumping hole, which can smoothly discharge the water vapor in the oblique pumping hole, avoid the accumulation of water vapor in the oblique pumping hole and suck it onto the product during vacuuming, affecting the surface quality of the product, and further improving the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention.

[0025] Figure 2 It is a top view of embodiment 1 of the present invention.

[0026] Figure 3 for Figure 2 AA section view.

[0027] Figure 4 for Figure 3 Schematic diagram of part of the structure.

[0028] Figure 5 Schematic diagram of the structure of the slider in Example 1 of the present invention.

[0029] Figure 6 It is a side view of the slider in embodiment 2 of the present invention.

[0030] Figure 7 for Figure 6 BB cross-sectional view. DETAILED DESCRIPTION

[0031] The following is further described in detail through specific implementation methods:

[0032] The figure marks in the drawings of the specification include: slide seat 1, slider 2, cylinder 3, output shaft 4, mounting block 5, connecting rod 6, core pulling blocking rod 7, sleeve inserting platform 8, core pulling hanging platform 9, anti-retraction screw 10, sleeve inserting 11, core pulling sleeve hanging platform 12, core pulling sleeve 13, core pulling sleeve limiting step 14, cavity surface 15, anti-rotation fitting surface 16, anti-rotation surface 17, sleeve inserting platform hole 18, top surface 19, inclined extraction hole 20, drainage channel 21, core pulling 22.

[0033] Embodiment 1:

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, a high-precision machining quick-change structure includes a slide 1, which is connected to a slider 2 by bolts, and an oblique withdrawal hole 20 is opened in the slider 2, and the lower end of the oblique withdrawal hole 20 extends to the cavity surface 15. A sleeve 11 is detachably installed in the oblique withdrawal hole 20. Specifically, a sleeve hanging platform 8 is integrally formed at the top of the sleeve 11, and a sleeve hanging platform hole 18 for limiting the position of the sleeve hanging platform 8 is connected to the top of the oblique withdrawal hole 20. An inclined top surface 19 is formed at the top of the sleeve hanging platform 8. The sleeve 11 is hung in the sleeve hanging platform hole 18 through the sleeve hanging platform 8, and then abuts against the slide 1 through the top surface 19, so that it can be detachably installed in the oblique withdrawal hole 20. A stop surface 17 is processed on the inner wall of the sleeve hanging platform hole 18, and a stop mating surface 16 mating with the stop surface 17 is formed on the side wall of the sleeve hanging platform 8. The cooperation between the anti-rotation surface 17 and the anti-rotation mating surface 16 can effectively prevent the insert sleeve 11 from rotating during the molding process, thereby further improving the stability of the insert sleeve 11.

[0035] A core pulling sleeve 13 is detachably installed in the oblique extraction hole 20, and the core pulling sleeve 13 is detachably connected to the insert sleeve 11. Specifically, a core pulling sleeve hanging platform 12 is integrally formed at the top of the core pulling sleeve 13, and a core pulling sleeve limiting step 14 for limiting the core pulling sleeve hanging platform 12 is integrally formed at the bottom of the oblique extraction hole 20. An anti-retraction screw 10 for preventing the core pulling sleeve 13 from retreating is connected to the inner thread of the insert sleeve 11, and the anti-retraction screw 10 is pressed against the top of the core pulling sleeve 13. The core pulling sleeve 13 is hung on the core pulling sleeve limiting step 14 through the core pulling sleeve hanging platform 12, and then pressed against by the anti-retraction screw, thereby being detachably installed in the oblique extraction hole 20 and detachably connected to the insert sleeve 11.

[0036] A core pulling device 22 is detachably mounted in the oblique pulling hole 20 , a core pulling drive assembly is mounted on the slide 1 , and the core pulling device 22 is detachably connected to the core pulling drive assembly. Specifically, the core pulling drive assembly includes a cylinder 3, which is bolted to the slide 1, and the output shaft 4 of the cylinder 3 is connected to a mounting block 5, on which are fixed a plurality of connecting rods 6 (the mounting block 5 is formed by two mounting plates connected by bolts, and a connecting block is integrally formed at the end of the connecting rod 6, and the connecting block is clamped between the two mounting plates). The interior of the connecting rod 6 is hollow, and a core pulling hanger 9 is integrally formed at the top of the core pulling 22, and a core pulling limiting step for limiting the core pulling hanger 9 is integrally formed at the bottom of the connecting rod 6. A core pulling blocking rod 7 for pressing against the core pulling 22 is inserted in the connecting rod 6, and the core pulling 22 is slidably inserted into the anti-retraction screw 10 and the core pulling sleeve 13, and is hung on the core pulling limiting step through the core pulling hanger 9, and then is pressed against the connecting rod 6 through the core pulling blocking rod 7, thereby being detachably connected to the connecting rod 6.

[0037] In actual use, when closing the mold, the external power drives the slider 2 and the slide 1 to move toward the cavity as a whole until the bottom end of the core pull sleeve 13 is in place. Then the oil cylinder 3 is started to drive the mounting block 5 to drive all the core pulls 22 to move further toward the cavity along the core pull sleeve 13 in the core pull sleeve 13 to participate in the product molding. When opening the mold, the oil cylinder 3 first pulls out the core pull 22, and the external power then withdraws the slide 1 and the slider 2 as a whole, thereby completing the molding of the product.

[0038] In this embodiment, since the anti-retraction screw 10 is threadedly connected in the insert sleeve 11, and the top of the insert sleeve 11 is pressed against the slide seat 1, the core pulling sleeve 13 can be effectively prevented from retreating, thereby ensuring the molding quality of the product, avoiding product breakage, and facilitating subsequent secondary processing of the product. In addition, the core pulling structure of this embodiment can also realize the quick replacement of the core pulling 22. Specifically, when replacing the core pulling 22, it is only necessary to start the oil cylinder 3 to pull out the mounting block 5 and the connecting rod 6, and then the core pulling 22 can be pulled out. The connection between the core pulling 22 and the connecting rod 6 can be released to remove the old core pulling 22, and the new core pulling 22 can be inserted into the oblique insertion hole again to complete the quick replacement of the core pulling 22. In addition, the present embodiment can also realize the quick replacement of the insert sleeve 11, the anti-retraction screw 10 and the core-pulling sleeve 13. After releasing the connection between the slide seat 1 and the slider 2, the insert sleeve 11, the anti-retraction screw 10 and the core-pulling sleeve 13 can be taken out as a whole. The anti-retraction screw 10 can be screwed out to take out the core-pulling sleeve 13, and a new insert sleeve 11 is replaced, a new core-pulling sleeve 13 is put in, and a new anti-retraction screw 10 is screwed in to complete the quick replacement of the insert sleeve 11, the anti-retraction screw 10 and the core-pulling sleeve 13. It is worth mentioning that in actual use, the required components can be replaced according to needs and actual conditions, and it is not limited that the insert sleeve 11, the anti-retraction screw 10 and the core-pulling sleeve 13 must be replaced together.

[0039] Embodiment 2:

[0040] Combination Figure 6 and Figure 7 As shown, the difference between this embodiment and embodiment 1 is that the oblique extraction hole 20 is connected to a drainage channel 21, and the drainage channel 21 extends to the outside of the cavity. If there is water vapor in the oblique extraction hole 20, it can be discharged to the outside of the cavity through the drainage channel 21, avoiding water stains on the product, further ensuring product quality.

[0041] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A high-precision machining quick-change structure, comprising a slide seat, the slide seat is connected to a slider, a core pulling device is arranged in the slider, an oblique pulling hole is opened in the slider, a core pulling sleeve is arranged in the oblique pulling hole, and the characteristics are: The inner thread of the oblique withdrawal hole is connected with an anti-retraction screw for preventing the core pulling sleeve from retreating. A core pulling drive assembly is arranged on the slide seat. The core pulling and the core pulling drive assembly are detachably connected. The anti-retraction screw and the core pulling sleeve are arranged on the core pulling.

2. A high-precision machining quick-change structure according to claim 1, characterized in that: A sleeve is detachably arranged in the oblique withdrawal hole, and an anti-retraction screw is threadedly connected in the sleeve.

3. A high-precision machining quick-change structure according to claim 2, characterized in that: A sleeve hanging platform is arranged at the top of the sleeve, and the end of the inclined hole is connected with a sleeve hanging platform hole for limiting the sleeve hanging platform. The sleeve can be detachably installed in the slider through the sleeve hanging platform and the sleeve hanging platform hole. When the sleeve is installed in the slider, the end of the sleeve hanging platform abuts against the sliding seat.

4. A high-precision machining quick-change structure according to claim 3, characterized in that: A rotation-stopping surface is arranged on the inner wall of the hole of the insert sleeve hanging platform, and a rotation-stopping matching surface matching with the rotation-stopping surface is arranged on the side wall of the insert sleeve hanging platform.

5. The high-precision machining quick-change structure according to claim 1, characterized in that: A core pulling sleeve hanging platform is arranged at the top of the core pulling sleeve, and a core pulling sleeve limiting step for limiting the core pulling sleeve hanging platform is arranged at the bottom of the inclined pulling hole.

6. The high-precision machining quick-change structure according to claim 1, characterized in that: The core pulling drive assembly comprises an oil cylinder, the output shaft of which is connected with a mounting block, a plurality of connecting rods are fixed on the mounting block, and the connecting rods are detachably connected with the core pulling.

7. A high-precision machining quick-change structure according to claim 6, characterized in that: The connecting rod is hollow inside, a core pulling hanging platform is arranged at the top of the core pulling, a core pulling limiting step for limiting the core pulling hanging platform is arranged at the bottom of the connecting rod, a core pulling blocking rod for tightening the core pulling is arranged inside the connecting rod, and the core pulling slides through the anti-retraction screw and the core pulling sleeve.

8. The high-precision machining quick-change structure according to claim 1, characterized in that: The oblique extraction hole is connected with a drainage channel, and the drainage channel extends outside the cavity.

9. The high-precision machining quick-change structure according to claim 1, characterized in that: The sliding seat and the sliding block are detachably connected.

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