Mold core-pulling structure
By using a layered linkage design and protective components to protect the core-pulling structure of the mold, the problems of low space utilization and wear in the core-pulling structure of the mold are solved, realizing a compact and efficient core-pulling process and ensuring that the parts are free of residue and damage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2026-03-31
AI Technical Summary
Existing mold core-pulling structures are bulky and have low space utilization, which limits their layout in compact spaces and easily leads to wear and reduced precision.
A mold core-pulling structure was designed, which adopts a layered linkage slider combination and protective components. The core-pulling action is used to realize the layer-by-layer release of the fastening relationship of the parts, and the protective components are used to protect the oblique holes and avoid wear.
It significantly saves space, improves the utilization rate of the internal space of the mold, ensures that the parts are free of residue and damage, extends the life of the core-pulling structure, and improves the stability and accuracy of the core-pulling action.
Smart Images
Figure CN224060361U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mold technology, specifically a mold core-pulling structure. Background Technology
[0002] The core-pulling structure is a key technology in mold design, used to form internal cavities, side holes, or irregular structures of complex parts during casting or injection molding. Its principle is to create special geometric shapes that cannot be directly demolded by moving a movable mold component (core-pulling slider) laterally during molding.
[0003] In existing technologies, mold core-pulling structures generally suffer from large volume and low space utilization, increasing the space occupied by the core-pulling structure in the mold, reducing the mold's performance, and also limiting the layout of the core-pulling structure in a compact space. To address this, we propose a mold core-pulling structure. Utility Model Content
[0004] The purpose of this utility model is to provide a mold core-pulling structure to solve the technical problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a mold core-pulling structure, including a base plate and a core-pulling mechanism disposed on the base plate, wherein the core-pulling mechanism includes:
[0006] A first slider group and a second slider group are set on the base plate. A middle cylinder and two sets of inclined plates are fixedly set on one side of the first slider group. A slide plate is slidably set on one end of the inclined plate. Two sets of fixed plates are fixedly set on one side of the second slider group. A fixed strip is fixedly set on one side of the slide plate. An L-shaped lifting strip is slidably set inside the fixed plate. A connecting spring is fixedly set between the fixed plate and the fixed strip.
[0007] Preferably, the inner wall of the slide plate is fixedly provided with two sets of inverted blocks and two sets of protrusions, the first slider group includes slider one and slider two, and the second slider group includes slider three and slider four.
[0008] Preferably, the bottom of the first slider group is fixedly provided with a stop block and a limiting body, the top of the base plate is provided with an arc groove, and a spacer is slidably provided on the limiting body.
[0009] Preferably, the first slider has two sets of side holes inside, and the main screw is installed inside the side holes; the third slider has two sets of screw holes inside.
[0010] Preferably, the slider has an oblique hole inside, and a protective component is installed inside the oblique hole.
[0011] The protective component includes a protective inclined cylinder disposed inside the inclined hole.
[0012] Preferably, the bottom of the protective inclined cylinder is provided with two sets of screw holes, and the screw holes are connected to screw rods by threads.
[0013] Preferably, two sets of inner rings are embedded in the bottom of the slider one, and a threaded ring is threadedly connected to the outside of the screw.
[0014] Preferably, the first slider group and the second slider group can slide on the base plate.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] (1) This utility model integrates multiple components in the traditional core-pulling structure onto the base plate through the layered linkage structure of the first slider group and the second slider group. The structure is compact, saves space, and significantly improves the utilization rate of the internal space of the mold. It is suitable for the design requirements of miniaturized and precision molds, and can also save costs. Through two core-pulling actions, the first core-pulling separates the undercut block of the slide plate from the undercut groove in the part. The second core-pulling drives the overall structure to move, gradually releasing the fastening relationship between the part and the mold. The second core-pulling is linked to the second slider group through the main screw, and with the limiting structure of the spacer and the arc groove, the whole demolding is achieved, ensuring that the part is free of residue and damage.
[0017] (2) The present invention uses a protective component, in which the protective inclined cylinder is embedded as an independent component in the inclined hole of the slider. When the upper mold drives the inclined guide post to move up and down, the inclined guide post directly contacts the inner wall of the protective inclined cylinder, rather than directly rubbing the inclined hole of the slider body. This can effectively avoid wear caused by the long-term reciprocating motion of the inclined guide post to the inner wall of the inclined hole, prevent the inner diameter of the inclined hole from expanding due to wear, avoid the increase of the gap between the inclined guide post and the inclined hole, and ensure the accuracy and stability of the core pulling action. This not only extends the life of the core pulling structure, but also improves the stability of the core pulling action and the forming quality of the parts. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the right-side upward-looking structure of this utility model;
[0020] Figure 3 This is a cross-sectional view of the first and second slider groups of this utility model.
[0021] Figure 4 This is a cross-sectional bottom view of the first and second slider groups of this utility model;
[0022] Figure 5 For the present utility model Figure 4Enlarged structural diagram of section B;
[0023] Figure 6 This is a partial cross-sectional view of the base plate of this utility model;
[0024] Figure 7 This is a schematic diagram of the inclined plate and intermediate cylinder structure of this utility model;
[0025] Figure 8 This is a schematic diagram of the inclined plate cross-sectional structure of this utility model;
[0026] Figure 9 For the present utility model Figure 1 Schematic diagram of the AA section structure;
[0027] In the diagram: 100, base plate; 101, side hole; 102, slider one; 103, oblique hole; 104, slider two; 105, slider three; 106, slider four; 108, fixing plate; 109, intermediate cylinder; 110, sliding plate; 111, oblique plate; 112, spacer; 113, limiting body; 114, arc groove; 115, L-shaped lifting bar; 116, fixing bar; 117, connecting spring; 118, protrusion; 119, undercut block; 120, main screw; 121, stop block; 200, protective oblique cylinder; 201, inner ring; 202, threaded ring; 203, screw. Detailed Implementation
[0028] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0029] Example 1
[0030] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8 and Figure 9A mold core-pulling structure includes a base plate 100 and a core-pulling mechanism disposed on the base plate 100. The core-pulling mechanism includes a first slider group and a second slider group disposed on the base plate 100. A middle cylinder 109 and two sets of inclined plates 111 are fixedly disposed on one side of the first slider group. The gap between the right end of the middle cylinder 109 and the right side of the slider 106 is a part of the injection molding undercut groove. During the first core-pulling, the two sets of undercut blocks 119 on the inner wall of the slider 110 disengage from the undercut groove of the molded part, and the protrusion 118 disengages from the interior of the molded part. The second core-pulling completes the core-pulling structure except for the base plate 100. The movement of the core puller completes the core pulling process, which allows for the smooth demolding of complex undercut grooves in injection molded parts. A sliding plate 110 is slidably provided at one end of the inclined plate 111. Two sets of fixing plates 108 are fixedly provided on one side of the second slider group. The fixing plates 108 are fixed on the slider 106. A fixing strip 116 is fixedly provided on one side of the sliding plate 110. An L-shaped lifting strip 115 is slidably provided inside the fixing plate 108. When the fixing strip 116 moves outward or inward, it will drive the L-shaped lifting strip 115 to slide up and down inside the fixing plate 108. A connecting spring 117 is fixedly provided between the fixing plate 108 and the fixing strip 116.
[0031] The inner wall of the slide plate 110 is fixedly provided with two sets of undercut blocks 119 and two sets of protrusions 118. The first slider group includes slider one 102 and slider two 104. The undercut blocks 119 make the part have undercut grooves. The second slider group includes slider three 105 and slider four 106.
[0032] The bottom of the first slider group is fixedly provided with a stop block 121 and a limiting body 113, and the top of the base plate 100 is provided with an arc groove 114. A spacer 112 is slidably provided on the limiting body 113, and the bottom of the spacer 112 passes through the interior of the arc groove 114.
[0033] The slider 102 has two sets of side holes 101 inside. The left end of the main screw 120 is located inside the side hole 101. The main screw 120 is installed inside the side hole 101. The slider 3 105 has two sets of screw holes inside. The working end of the main screw 120 passes through the inside of the slider 2 104 and extends into the inside of the screw hole. The working end of the main screw 120 is connected to the screw hole by a thread.
[0034] This utility model, through its designed core-pulling mechanism and the layered linkage structure of the first and second slider groups, integrates multiple components of the traditional core-pulling structure onto the base plate 100. The structure is compact, saves space, and significantly improves the utilization rate of the internal space of the mold, adapting to the design requirements of miniaturized and precision molds. Through two core-pulling actions, the first core-pulling separates the undercut block 119 of the slide plate 110 from the undercut groove in the part. The second core-pulling drives the overall structure to move, gradually releasing the fastening relationship between the part and the mold. The second core-pulling is linked to the second slider group through the main screw 120, and with the limiting structure of the spacer 112 and the arc groove 114, the whole demolding is achieved, ensuring that the part is free of residue and damage.
[0035] Example 2
[0036] Please refer to Example 1. Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 9 The slider 102 has an inclined hole 103 inside. The inclined guide post is a cylindrical rod with a certain inclination angle (usually 15°-25°) to the mold opening direction. One end is fixed to the upper mold part of the mold, and the other end is inserted into the inclined hole 103 in the core pulling structure. The core pulling structure is driven to move laterally by the relative motion during mold opening to complete the core pulling. The inclined hole 103 is provided with a protective component, which includes a protective inclined cylinder 200 set inside the inclined hole 103.
[0037] The bottom of the protective inclined cylinder 200 is provided with two sets of screw holes, and the screw holes are connected to the screw rod 203 by threads;
[0038] Two sets of inner rings 201 are embedded in the bottom of slider 102. The bottom of screw 203 passes through the inside of the inner rings 201, and a threaded ring 202 is threadedly connected to the outside of screw 203.
[0039] In this embodiment, the first slider group and the second slider group can slide on the base plate 100.
[0040] This utility model, through the design of a protective component, has a protective inclined cylinder 200 embedded as an independent part within the inclined hole 103 of the slider 102. When the upper mold drives the inclined guide post to move up and down, the inclined guide post directly contacts the inner wall of the protective inclined cylinder 200, rather than directly rubbing against the inclined hole 103 of the slider body. This effectively avoids wear on the inner wall of the inclined hole 103 caused by the long-term reciprocating motion of the inclined guide post, prevents the inner diameter of the inclined hole 103 from expanding due to wear, avoids an increase in the clearance between the inclined guide post and the inclined hole 103, and ensures the accuracy and stability of the core-pulling action. This not only extends the life of the core-pulling structure but also improves the stability of the core-pulling action and the forming quality of the parts.
[0041] Working principle and usage process of this utility model:
[0042] When this utility model is in use, during the core removal of the injection-molded part, the upper mold in the mold rises under the drive of the lifting device, causing the inclined guide post to move. At this time, the inclined guide post, which is inserted into the inclined hole 103, moves upward, causing the first slider group to move to the left. The first slider group causes the stop block 121 and the limiting body 113 to move. Since there is a gap between the left end protruding part of the main screw 120 and the side hole 101, when the first slider group moves, the two sets of main screws 120 and the second slider group do not move. After the stop block 121 moves to the left a certain position, the stop block 121 is in the state of pressing down the lower spacer 112 (at this time, because the bottom of the spacer 112 is in the state of the arc groove 114, and the spacer 112 blocks the second slider group). (Immobile), while the first slider group moves, it also drives the middle cylinder 109 and the two sets of inclined plates 111 to move. As the inclined plate 111 moves to the left, the outer end of the slide plate 110 is affected by the inclined surface of the right end of the inclined plate 111. At this time, the connecting spring 117 starts to compress and reset from the original stretched state, driving the fixing bar 116 to move outward (that is, away from the middle cylinder 109). Through the fixing bar 116, the slide plate 110 moves outward. At this time, the slide plate 110 will slide outward in the slider 4 106 in the second slider group. Through the movement of the slide plate 110, the two sets of undercut blocks 119 and the two sets of protrusions 118 move. Then the undercut blocks 119 disengage from the undercut groove in the molded part (this process is the first core pulling of the molded part).
[0043] After the first slider group continues to move a certain distance, the gap between the protruding part on the left end of the main screw 120 and the side hole 101 in the first slider group disappears. As the first slider group continues to move, it drives the main screw 120 to move as well. The main screw 120 drives the second slider group to move, and the second slider group drives the slide plate 110, the inclined plate 111, etc. to move as well. When the first slider group moves, it continues to drive the stop block 121 to move. The notch at the bottom right end of the stop block 121 is located above the space between the spacer 112 and the spacer 112. At this time, there is upward movement space above the spacer 112. Then, when the second slider group moves to the left, it contacts the spacer 112 and pushes it to the left. When it is pushed, the spacer 112, whose bottom is in the arc groove 114, moves upward and to the left, so that the bottom of the spacer 112 is removed from the interior of the arc groove 114. At this time, the second slider group can move completely to the left (this process is the second core pulling of the formed part). Then the part located on the right side of the second slider group is removed from the second slider group, and the formed part can be taken out.
[0044] To avoid wear on the inner wall of the inclined hole 103 during the insertion or disengagement of the inclined guide post, the protective inclined cylinder 200 is inserted into the inclined hole 103 beforehand, and the two sets of screw holes at the bottom of the protective inclined cylinder 200 are aligned with the corresponding inner ring 201 below. Then, the top of the screw 203 passes through the inside of the inner ring 201 and is screwed into the inside of the screw hole. Finally, the threaded ring 202 is tightened onto the screw 203, so that the top of the threaded ring 202 contacts the bottom of the inner ring 201, thus allowing the protective inclined cylinder 200 to be inserted. When the upper mold moves up and down in the mold, it will drive the inclined guide post to directly contact the inner wall of the protective inclined cylinder 200, instead of directly contacting the inner wall of the inclined hole 103. This protects the inclined hole 103 and prevents wear from increasing the inner diameter of the inclined hole 103, which would increase the gap between the inner wall of the inclined hole 103 and the inclined guide post, affecting the fit between the inclined guide post and the inclined hole 103 later, and thus affecting the core pulling process.
[0045] The above embodiments are only used to illustrate the technical methods of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of this utility model without departing from the spirit and scope of the technical methods of this utility model.
Claims
1. A mold core-pulling structure comprising a base plate (100) and a core-pulling mechanism provided on the base plate (100), characterized in that: The core pulling mechanism comprises: A first slider group and a second slider group are arranged on the bottom plate (100), one side of the first slider group is fixedly provided with an intermediate cylinder (109) and two groups of inclined plates (111), one end of the inclined plate (111) is slidably provided with a sliding plate (110), one side of the second slider group is fixedly provided with two groups of fixed plates (108), one side of the sliding plate (110) is fixedly provided with a fixed strip (116), the inside of the fixed plate (108) is slidably provided with an L-shaped lifting strip (115), and the fixed plate (108) and the fixed strip (116) are fixedly provided with a connecting spring (117) therebetween.
2. A mold core structure according to claim 1, wherein: The inner wall of the sliding plate (110) is fixedly provided with two groups of reverse buckles (119) and two groups of protrusions (118), the first slider group comprises a slider one (102) and a slider two (104), and the second slider group comprises a slider three (105) and a slider four (106).
3. The mold core structure of claim 1, wherein: The bottom of the first slider group is fixedly provided with a stop block (121) and a limiting body (113), the top of the bottom plate (100) is provided with an arc-shaped groove (114), and the limiting body (113) is slidably provided with a meson (112).
4. The mold core structure of claim 2, wherein: The inside of the slider one (102) is provided with two groups of side holes (101), the inside of the side hole (101) is provided with a main screw (120), and the inside of the slider three (105) is provided with two groups of screw holes.
5. A mold core retraction structure according to claim 4, wherein: The inside of the slider one (102) is provided with an inclined hole (103), and the inside of the inclined hole (103) is provided with a protection piece: The protection piece comprises a protection inclined cylinder (200) arranged in the inclined hole (103).
6. A core-drawing structure of a mold according to claim 5, wherein: The bottom of the protection inclined cylinder (200) is provided with two groups of screw holes, and the inside of the screw hole is threadedly connected with a screw rod (203).
7. A mold core retraction structure according to claim 6 wherein: The bottom of the slider one (102) is embeddedly installed with two groups of inner rings (201), and the outside of the screw rod (203) is threadedly connected with a threaded ring (202).
8. The mold core structure of claim 1, wherein: The first slider group and the second slider group can slide on the bottom plate (100).