Ceramic sleeve injection molding device

Abstract

The utility model discloses a ceramic sleeve injection molding device which comprises a fixed mold assembly, a movable mold assembly, an injection molding assembly and a feeding assembly, and the movable mold assembly comprises a main body part, a first mounting through hole, a second mounting through hole and a runner; the feeding assembly comprises a feeding part and a cutting knife, the cutting knife is located at the end, close to the first mounting through hole, of the runner, and the feeding assembly is located in the second mounting through hole; the injection molding assembly comprises a first driving structure and an inner hole core combined structure, one end of the inner hole core combined structure is located in the first mounting through hole, the other end of the inner hole core combined structure extends out of the first mounting through hole, a forming cavity is formed between the part, close to the fixed mold assembly, in the first mounting through hole and the first mounting through hole, and the forming cavity transversely communicates with the feeding part through a runner; the first driving structure is connected with the inner hole core combined structure so as to drive the blank piece in the forming cavity to move in the vertical direction relative to the cutting knife. The utility model can realize accurate molding and automatic demolding, and is beneficial to improving the precision and appearance quality of the ceramic sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of preparation of optical communication ceramic precision parts, in particular to a ceramic sleeve injection molding device. Background Art

[0002] The transmission of optical signals in fiber-optic communications is crucial. Therefore, the ceramic sleeve in the fiber-optic connector, which serves as the optical signal connection, must meet extremely high precision requirements. In particular, the precision of the ceramic sleeve's inner hole concentricity and aperture size directly affects the efficiency of optical signal transmission.

[0003] For ceramic sleeves with high precision requirements, an injection molding machine is usually used. After filling a mold of a specific size with material and pressing it into shape, the mold is peeled off after molding to obtain a blank, and the blank is sintered to prepare a finished ceramic sleeve. In the prior art, when using an injection molding machine to inject materials, it is necessary to design a local opening on the upper end of the mold to facilitate the injection of material powder, so that the blank after molding needs to be processed and cut off the excess part, resulting in material waste, and the flatness of the cross-section also affects the precision and appearance of the ceramic sleeve; in the demoulding process, the blank is often obtained by separating the movable mold and the fixed mold combined in the mold, but it still requires manual assistance after robot operation, which is inefficient and easily causes poor quality such as local chipping and inner hole deformation, resulting in reduced concentricity of the inner hole of the blank and reduced precision of the ceramic sleeve. Utility Model Content

[0004] The technical problem to be solved by the present invention is that the blank needs to be manually assisted to be dismantled after being formed, which is inefficient and easily causes poor quality such as local chipping, inner hole deformation, etc., resulting in reduced concentricity of the inner hole of the blank, resulting in reduced accuracy of the ceramic sleeve, and the waste of materials and poor cross-sectional flatness caused by the upper end opening design in traditional molds.

[0005] In order to solve the above technical problems, the utility model provides a ceramic sleeve injection molding device, comprising:

[0006] Fixed mold assembly;

[0007] A movable mold assembly includes a main body, a first mounting through hole formed by the main body and recessed in a vertical direction thereof, a second mounting through hole, and a flow channel laterally connected to the first mounting through hole, wherein the movable mold assembly is detachably connected to the fixed mold assembly;

[0008] a feed assembly comprising a feed portion and a cutting knife for separating materials and blanks, wherein the cutting knife is located at one end of the flow channel close to the first mounting through hole, and the feed assembly is located in the second mounting through hole; and

[0009] An injection molding component includes a first drive structure and an inner hole core combination structure, wherein one end of the inner hole core combination structure close to the fixed mold component is located in the first mounting through hole, and the other end extends out of the first mounting through hole, and a molding cavity is formed between the portion of the first mounting through hole close to the fixed mold component and the first mounting through hole, and the molding cavity is horizontally connected to the feed part through the runner, and the first drive structure is connected to the inner hole core combination structure to drive the blank in the molding cavity to move in the vertical direction relative to the cutting knife.

[0010] Furthermore, the main body includes a movable template, a fixed pad, a support structure and a fixed bottom plate which are sequentially connected in the vertical direction; the fixed pad, the support structure and the fixed bottom plate enclose a first movable cavity.

[0011] Furthermore, the inner hole core combination structure includes an inner hole core, a fixed block and a push tube. One end of the inner hole core is connected to the fixed base plate through the fixed block, and the other end extends out of the first mounting through hole and has a fixed or detachable connection relationship with the fixed mold assembly. The push tube is slidably sleeved on the circumferential side of the inner hole core, and the first driving structure is connected to the push tube.

[0012] Furthermore, the first driving structure includes a driving block, the driving block is located at an end of the inner core away from the forming cavity, and the driving block is connected to the push tube.

[0013] Furthermore, the driving block is made of elastic material.

[0014] Furthermore, the movable mold assembly also includes a second driving structure located in the first active cavity, the second driving structure includes an ejection block, a second active cavity is provided inside the ejection block, the inner hole core vertically penetrates the ejection block and is slidably connected to the push tube in the first mounting through hole.

[0015] Furthermore, the push tube includes a first ring portion and a first connecting portion, the first ring portion is located in the second movable cavity, the first connecting portion is close to the forming cavity, and the caliber of the first ring portion is larger than the caliber of the first connecting portion.

[0016] Furthermore, the fixing block is connected to the fixing base plate, and the fixing base plate is provided with a first through hole for fixing the bottom of the inner hole core, and is coaxially arranged with the first mounting through hole.

[0017] Furthermore, the ejection block is also provided with a second through hole for fixing the tail of the feeding assembly, and is coaxially arranged with the second mounting through hole.

[0018] Furthermore, the fixed mold assembly includes a fixed mold fixing plate and a fixed mold plate connected to the fixed mold fixing plate, and the fixed mold plate has a first accommodating groove for accommodating the top of the feed part and a second accommodating groove for accommodating the top of the core structure.

[0019] Compared with the prior art, the ceramic sleeve injection molding device according to the embodiment of the utility model has the following beneficial effects:

[0020] The embodiment of the utility model provides a cutting knife at the end of the flow channel. After the blank is formed, the first drive structure drives the inner hole core assembly structure to move. The cutting knife moves vertically relative to the side of the blank to complete the cutting of excess material, so that the blank and the material are separated. This avoids the problem of material waste in traditional methods. At the same time, it can realize the automated demolding process (mold closing-mold opening), reduce the need for robot operation, and reduce the quality risk brought by manual assisted demolding. In addition, since the cutting is carried out at the same time as the forming, the flatness of the cut surface can be ensured, which helps to improve the precision and appearance quality of the ceramic sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a mold-closing state of a ceramic sleeve injection molding device provided by an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the initial mold opening state of the ceramic sleeve injection molding device provided by an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the final mold opening state of the ceramic sleeve injection molding device provided by an embodiment of the utility model;

[0024] Figure 4 The embodiment of the present utility model provides Figure 3 A partial enlarged view of the circled part A

[0025] In the figure, 1, fixed mold assembly; 11, fixed mold fixing plate; 12, fixed mold plate; 121, first receiving groove; 122, second receiving groove; 2, movable mold assembly; 21, main body; 211, movable mold plate; 212, fixed pad; 213, supporting structure; 214, fixed bottom plate; 2141, first through hole; 215, first movable cavity; 22, first mounting through hole; 23, second mounting through hole; 24, runner; 25, molding cavity; 26, second drive Structure; 261, ejector block; 2611, second active cavity; 2612, second through hole; 3, injection molding component; 31, first driving structure; 311, driving block; 3111, second ring portion; 3112, second connecting portion; 32, inner hole core combination structure; 321, inner hole core; 322, fixing block; 323, push tube; 3231, first ring portion; 3232, first connecting portion; 4, feeding component; 41, feeding portion; 42, cutting knife. DETAILED DESCRIPTION

[0026] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] like Figures 1 to 4 As shown, the utility model provides a ceramic sleeve injection molding device, including a fixed mold assembly 1, a movable mold assembly 2, an injection molding assembly 3 and a feeding assembly 4. The movable mold assembly 2 is detachably connected to the fixed mold assembly 1 to form a complete mold. The movable mold assembly 2 has a main body 21, a first mounting through hole 22 concave along its vertical direction formed by the main body 21, a second mounting through hole 23 and a flow channel 24 horizontally connected to the first mounting through hole 22; the feeding assembly 4 includes a feeding part 41 and a cutting knife 42 for separating materials and blanks. The cutting knife 42 is located at one end of the flow channel 24 near the first mounting through hole 22. The feeding assembly 4 is located in the second mounting hole 23; the injection molding assembly 3 has a first driving structure 31 and an inner hole core combination structure 32, one end of the inner hole core combination structure 32 close to the fixed mold assembly 1 is located in the first mounting hole 22, and the other end extends out of the first mounting hole 22, and a molding cavity 25 is formed between the part close to the fixed mold assembly 1 in the first mounting hole 22 and the first mounting hole 22. The molding cavity 25 is horizontally connected to the feeding part 41 through the runner 24, and the first driving structure 31 is connected to the inner hole core combination structure 32 to drive the blank in the molding cavity 25 to move in the vertical direction relative to the cutting knife 42.

[0028] By providing a cutting blade 42 at the end of the flow channel 24, this embodiment allows the first drive structure 31 to drive the inner core assembly structure 32 to move after the blank is formed. The cutting blade 42 moves vertically relative to the side of the blank to cut away excess material, separating the blank from the material, thereby avoiding the material waste problem encountered in traditional methods. Furthermore, since cutting is performed simultaneously with forming, the flatness of the cut surface is ensured, which helps to improve the precision and appearance quality of the ceramic sleeve.

[0029] The main body 21 further comprises a movable platen 211, a fixed backing plate 212, a support structure 213, and a fixed base plate 214, which are connected in a vertical direction. The fixed backing plate 212, the support structure 213, and the fixed base plate 214 enclose a first movable cavity 215. The support structure 213 is located between the fixed backing plate 212 and the fixed base plate 214 and is used to provide structural strength for the entire main body 21.

[0030] Furthermore, the inner hole core combination structure 32 includes an inner hole core 321, a fixed block 322 and a push tube 323. One end of the inner hole core 321 is connected to the fixed base plate 214 through the fixed block 322 to ensure that the position of the inner hole core 321 is stable and will not shift during the injection molding process. The other end of the inner hole core 321 extends out of the first mounting through hole 22 and has a fixable / removable connection relationship with the fixed mold assembly 1 (that is, fixed in the closed mold state and removable in the open mold state). The push tube 323 is slidably sleeved on the circumferential side of the inner hole core 321 to form a molding cavity 25 between it and the first mounting through hole 22. The first driving structure 31 is connected to the push tube 323 to drive the push tube 323 to slide in the vertical direction.

[0031] As the material is injected into the molding cavity 25, the push tube 323 maintains its position. After injection is complete, it slides vertically, driven by the first drive mechanism 31, to separate the material from the blank. Furthermore, the inner core 321 is connected to the fixed base plate 214 via a fixed block 322, ensuring the stability of the molding cavity 25 during the injection molding process. This helps improve the molding accuracy of the ceramic sleeve and ensures the concentricity and dimensional accuracy of the inner hole.

[0032] Furthermore, the first drive structure 31 includes a drive block 311, which is located at the end of the inner core 321 facing away from the molding cavity 25 and is connected to the push tube 323. Specifically, the drive block 311 is connected to a first drive member (not shown in the figure), which is responsible for providing driving force. In this embodiment, the first drive member can be a hydraulic cylinder, a pneumatic cylinder, an electric actuator, or other power source capable of generating linear motion, which is used to drive the drive block 311 to slide in a predetermined direction (i.e., the vertical direction).

[0033] During the injection molding phase of this embodiment, the first drive structure 31 maintains the push tube 323 in a fixed position, forming the molding cavity 25 with the first mounting hole 22, ensuring that the material is evenly distributed and solidified into the desired shape. Subsequently, during the demolding phase, the first drive structure 31 drives the push tube 323 to move, thereby separating the molded blank from the excess material within the molding cavity 25. Furthermore, the first drive structure 31 ensures smooth and reliable movement of the push tube 323, reducing the uncertainty associated with manual operation, thereby helping to improve the molding quality of the ceramic sleeve, particularly with regard to cross-sectional flatness accuracy and good control of appearance.

[0034] Furthermore, the drive block 311 is made of an elastic material, which can compensate for minor displacements caused by mechanical tolerances or thermal expansion to a certain extent, helping to maintain the position of the inner core 321, thereby ensuring the concentricity and dimensional accuracy of the ceramic sleeve's inner bore. Furthermore, it can absorb some of the impact force, relieve this pressure, reduce stress concentration, and prevent deformation or damage to the inner core 321 or the push tube 323. At the same time, the elastic property can reduce the frictional resistance experienced by the blank during the demolding process, thereby reducing scratches or other damage to the blank surface.

[0035] Furthermore, the movable mold assembly 2 also includes a second drive structure 26 located within the first movable cavity 215. The second drive structure 26 includes an ejector block 261, within which a second movable cavity 2611 is disposed. The inner core 321 vertically penetrates the ejector block 261 and is slidably connected to the push tube 323 within the first mounting hole 22. The second drive structure 26 drives the push tube 323 to vertically push the blank out of the molding cavity 25. Specifically, the second drive structure 26 is connected to a second drive member (not shown in the figure). The second drive member is consistent with the first drive member and is responsible for providing driving force.

[0036] The primary function of the second drive structure 26 in this embodiment is to eject the molded blank from the molding cavity 25. After injection molding, the second drive structure 26 pushes the blank smoothly from the mold, completing the demolding process and avoiding quality issues that can arise from manual demolding, such as chipped corners or internal hole deformation. Furthermore, the second drive structure 26, in conjunction with the first drive structure 31, automates the injection and demolding processes. This increased level of automation not only reduces manual intervention but also improves production efficiency and consistency.

[0037] Furthermore, the push tube 323 includes a first ring portion 3231 and a first connecting portion 3232. The first ring portion 3231 is located in the second active cavity 2611, and the first connecting portion 3232 is close to the molding cavity 25. The diameter of the first ring portion 3231 is larger than the diameter of the first connecting portion 3232. That is, the first ring portion 3231 cannot pass through the cavity opening of the second active cavity 2611 and can only move in the second active cavity 2611.

[0038] Based on the above structure, when the second driving member drives the ejection block 261 to move in the vertical direction, the ejection block 261 drives the push tube 323 to slide in the vertical direction, and the first connecting portion 3232 of the push tube 323 pushes the formed blank out of the forming cavity 25, ensuring that the blank can be smoothly ejected from the mold, reducing the stress on the blank during the demolding process, and avoiding damage. In addition, this embodiment ensures the position stability of the push tube 323 and the driving block 311. The push tube 323 and the driving block 311 can only slide in the vertical direction in the second active cavity 2611 and will not separate from the second active cavity 2611, ensuring the position stability of the push tube 323 and the driving block 311 during the injection molding and demolding processes, and avoiding position deviation caused by excessive sliding range.

[0039] Furthermore, the fixing block 322 is connected to the fixed base plate 214. The fixed base plate 214 is provided with a first through-hole 2141 for fixing the bottom of the inner core 321 and is coaxially arranged with the first mounting through-hole 22. The ejector block 261 is provided with a second through-hole 2612 for fixing the rear end of the feed assembly 4 and is coaxially arranged with the second mounting through-hole 23. The coaxial design structure simplifies the overall design of the mold. This integrated structure not only makes the mold structure more compact, but also reduces the complexity of assembly and maintenance.

[0040] Furthermore, the fixed mold assembly 1 includes a fixed mold fixing plate 11 and a fixed mold plate 12 connected to the fixed mold fixing plate. The fixed mold fixing plate 11 provides a stable support to ensure that the position of the fixed mold plate 12 will not shift during the injection molding process. The fixed mold plate has a first receiving groove 121 for accommodating the top of the feed part 41 and a second receiving groove 122 for accommodating the top of the inner hole core combination structure 32.

[0041] In this embodiment, the top end of the feed portion 41 passes through the second mounting hole 23 and extends into the first receiving groove 121, ensuring that the feed portion 41 is positioned stably during the injection molding process and that the material can accurately enter the molding cavity 25. Similarly, the top end of the inner-hole core assembly structure 32 extends into the second receiving groove 122, ensuring that the inner-hole core 321 is positioned stably and prevents displacement during the injection molding process.

[0042] The specific working process is as follows:

[0043] S1: The material is placed in the feed portion 41, pressed into the molding cavity 25 through the flow channel 24, and pressed to obtain a ceramic sleeve blank of a specific size. At this time, the upper end of the formed blank abuts against the fixed mold plate 12, and the lower end abuts against the upper end of the push tube 323, and the side surface is still in a state of being connected to the excess material. In the mold closing state, the injection assembly 3 and the feed assembly 4 are connected / embedded with the fixed mold assembly 1 and the movable mold assembly 2;

[0044] S2: The driving block 311 contracts and drives the push tube 323 to move downward for a distance, so that the inner hole core 321 is separated from the fixed mold plate 12 and the fixed mold assembly 1 and the movable mold assembly 2 are completely separated. At the same time, the cutting knife 42 moves vertically relative to the side of the blank to complete the cutting of excess material, so that the material in the runner 24 is separated from the blank formed in the molding cavity 25. At this time, the mold is in the initial open state;

[0045] S3: On the basis of the initial mold opening state, the whole composed of the driving block 311, the push tube 323, and the ejection block 261 moves upward relative to the whole composed of the inner hole core 321 and the fixed block 322. At this time, as the ejection block 261 moves upward, the push tube 323 gradually pushes the blank out of the original position of the molding cavity 25, and moves upward relative to the movable template 211 and the fixed pad 212 in the movable mold assembly 2. Finally, under the action of the push tube 323, the lower end of the blank is driven to move completely to the upper end horizontal plane of the movable template 211, so that the blank and the push tube 323 are completely separated, and the final mold opening state is achieved.

[0046] To sum up, the embodiment of the utility model provides a ceramic sleeve injection molding device. Compared with the traditional method of performing cross-section processing on excess materials after injection molding, it is changed to side feeding and can be automatically cut off during the mold opening process to form a ceramic sleeve with good appearance and good flatness at both ends. In addition, the initial mold opening and the final mold opening state are realized through the relative movement between different combinations. There is no need for manual auxiliary mold opening, and fully automatic controllable stripping is realized with high stripping efficiency. The inner hole concentricity of the obtained ceramic sleeve is high, which is suitable for the preparation of high-quality and high-precision ceramic sleeves.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A ceramic sleeve injection molding device, characterized in that, include: Fixed mold assembly; A movable mold assembly includes a main body, a first mounting through hole formed by the main body and recessed in a vertical direction thereof, a second mounting through hole, and a flow channel laterally connected to the first mounting through hole, wherein the movable mold assembly is detachably connected to the fixed mold assembly; a feed assembly comprising a feed portion and a cutting knife for separating materials and blanks, the cutting knife being located at one end of the flow channel close to the first mounting through hole, and the feed assembly being located in the second mounting through hole; as well as An injection molding component includes a first drive structure and an inner hole core combination structure, wherein one end of the inner hole core combination structure close to the fixed mold component is located in the first mounting through hole, and the other end extends out of the first mounting through hole, and a molding cavity is formed between the portion of the first mounting through hole close to the fixed mold component and the first mounting through hole, and the molding cavity is horizontally connected to the feed part through the runner, and the first drive structure is connected to the inner hole core combination structure to drive the blank in the molding cavity to move in the vertical direction and relative to the cutting knife.

2. The ceramic sleeve injection molding device according to claim 1, characterized in that: The main body includes a movable template, a fixed pad, a support structure and a fixed bottom plate which are sequentially connected in the vertical direction; the fixed pad, the support structure and the fixed bottom plate enclose a first movable cavity.

3. The ceramic sleeve injection molding device according to claim 2, characterized in that: The inner hole core combination structure includes an inner hole core, a fixed block and a push tube. One end of the inner hole core is connected to the fixed base plate through the fixed block, and the other end extends out of the first mounting through hole and has a fixed or detachable connection relationship with the fixed mold assembly. The push tube is slidably sleeved on the circumference of a portion of the inner hole core, and the first driving structure is connected to the push tube.

4. The ceramic sleeve injection molding device according to claim 3, characterized in that: The first driving structure includes a driving block, the driving block is located at one end of the inner hole core away from the forming cavity, and the driving block is connected to the push tube.

5. The ceramic sleeve injection molding device according to claim 4, characterized in that: The driving block is made of elastic material.

6. The ceramic sleeve injection molding device according to claim 3, characterized in that: The movable mold assembly also includes a second driving structure located in the first active cavity, the second driving structure includes an ejection block, a second active cavity is provided inside the ejection block, the inner hole core vertically passes through the ejection block and is slidably connected to the push tube in the first mounting through hole.

7. The ceramic sleeve injection molding device according to claim 6, characterized in that: The push tube includes a first ring portion and a first connecting portion. The first ring portion is located in the second movable cavity. The first connecting portion is close to the forming cavity. The caliber of the first ring portion is larger than that of the first connecting portion.

8. The ceramic sleeve injection molding device according to claim 3, characterized in that: The fixing block is connected to the fixing base plate. The fixing base plate is provided with a first through hole for fixing the bottom of the inner hole core and is coaxially arranged with the first mounting through hole.

9. The ceramic sleeve injection molding device according to claim 6, characterized in that: The ejector block is further provided with a second through hole for fixing the tail of the feed assembly, and is coaxially arranged with the second mounting through hole.

10. The ceramic sleeve injection molding device according to claim 1, characterized in that: The fixed mold assembly includes a fixed mold fixing plate and a fixed mold plate connected to the fixed mold fixing plate. The fixed mold plate has a first accommodating groove for accommodating the top of the feed part and a second accommodating groove for accommodating the top of the core structure.

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