Rotary core-pulling mechanism and laryngoscope blade injection mold using same

Abstract

The utility model provides a rotary core-pulling mechanism and a laryngoscope blade injection mold using the same, relates to the field of structural design of injection molds, and is beneficial to improving the production quality and the production efficiency of laryngoscope blades by optimizing the structural design of the rotary core-pulling mechanism and realizing flexible and smooth core pulling. Wherein the rotary core-pulling mechanism comprises a rotary driving mechanism and a core-pulling block, and the core-pulling block is driven by the rotary driving mechanism to rotate; the rotary driving mechanism comprises a rifle rod, an internal thread sleeve, a connecting block, a base and a bearing; the rifle rod is sleeved with the inner threaded sleeve, the inner threaded sleeve and the rifle rod are in threaded fit, the connecting block is fixed to the outer portion of the inner threaded sleeve, the base is fixed to the connecting block, the core pulling block is provided with a fixing part fixedly connected with the base and an arc-shaped block part matched with an inner cavity of a to-be-formed component in shape, and the circle center of the arc-shaped block part is located on the central axis of the rifle rod. And the bearing is sleeved outside the internal thread sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a rotary core-pulling mechanism and a laryngoscope blade injection mold using the same. Background Art

[0002] As an essential instrument for the anesthesiology department, emergency department and laryngology department of a hospital, laryngoscopes have been widely used. Most of the existing laryngoscope blades are made of plastic material and are integrally molded by injection molds. The laryngoscope blades have an arc-shaped inner cavity, and a suitable core-pulling mechanism needs to be set on the injection mold for core pulling. The main problem of the injection mold currently used to produce laryngoscope blades is that the core-pulling mechanism structure is unreasonable, resulting in the core-pulling block not being flexible and smooth enough, and the stability is poor, which in turn affects the core-pulling demoulding speed and production quality. Therefore, it is necessary to optimize the existing core-pulling mechanism structure to solve the related problems existing in the prior art. Utility Model Content

[0003] To this end, the utility model provides a rotary core-pulling mechanism and a laryngoscope blade injection mold using the same, which can be adapted to the injection molding production of laryngoscope blades, and the core-pulling block moves flexibly and smoothly and operates stably.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] In a first aspect, the utility model provides a rotary core pulling mechanism, comprising a rotary drive mechanism and a core pulling block, wherein the core pulling block is driven to rotate by the rotary drive mechanism;

[0006] The rotary drive mechanism comprises a rifle rod, an internal thread sleeve, a connecting block, a base and a bearing;

[0007] The internal threaded sleeve is sleeved on the outside of the rifle rod and forms a threaded fit with the rifle rod, the connecting block is fixed on the outside of the internal threaded sleeve, and the base is fixed on the connecting block, the core pulling block has a fixing portion fixedly connected to the base and an arc-shaped block portion matching the inner cavity shape of the part to be formed, and the center of the arc-shaped block portion is on the central axis of the rifle rod;

[0008] The bearing is sleeved on the outside of the internal thread sleeve.

[0009] When the above-mentioned rotary core pulling mechanism is used for core pulling on an injection mold, the rifle rod is driven to move axially, and then under the action of the threaded cooperation between the rifle rod and the internally threaded sleeve, the internally threaded sleeve is driven to rotate a certain angle by controlling the axial movement stroke of the rifle rod, and during the rotation process, the connecting block and the base and core pulling block fixedly connected thereto are driven to rotate to achieve core pulling.

[0010] In some embodiments, a collar portion is provided on the connection block, and the collar portion is sleeved and locked with the upper end of the internally threaded sleeve.

[0011] In some embodiments, an upward stop step is provided on the outside of the upper end of the internally threaded sleeve, the ring portion is sleeved on the upper end of the internally threaded sleeve and the lower edge of the ring portion abuts against the stop step, and a baffle is fixed to the upper end of the internally threaded sleeve to limit the ring portion downward; a positioning key strip is inserted between the ring portion and the internally threaded sleeve, and is limited by the baffle.

[0012] In some embodiments, a convex ring is provided on the outer peripheral wall of the internally threaded sleeve, and the bearings are mounted on the outer side of the internally threaded sleeve in contact with the upper and lower sides of the convex ring.

[0013] In some embodiments, the base is provided with a first embedding groove, and the end of the connecting block is embedded in the first embedding groove and fixed by a first screw.

[0014] In some embodiments, a second embedding groove is provided on the base, and the fixing portion is embedded in the second embedding groove and fixed by a second screw.

[0015] In some embodiments, a matching conical socket and a conical slot are provided on the joint surface of the base and the fixing portion, and the plugging direction of the conical socket and the conical slot is the same as that of the second screw, and the cross-sectional shapes of the conical socket and the conical slot are matching polygons.

[0016] In some embodiments, the outer edge of the base is provided with a convex edge protruding outward.

[0017] In some embodiments, the base and the core pulling block are provided with interconnected cooling pipelines, and a cooling pipeline interface is provided on the base.

[0018] In the second aspect, the utility model provides a laryngoscope blade injection mold, comprising a lower mold and an upper mold cooperating with the lower mold, the lower mold being equipped with the rotating core-pulling mechanism described in any of the above embodiments, the part to be formed is a laryngoscope blade, the internally threaded sleeve is rotatably connected to the lower mold through the bearing, the lower end of the rifle rod is used to connect to an external driving mechanism, and is suitable for driving the rifle rod to move up and down relative to the lower mold through the external driving mechanism, thereby driving the internally threaded sleeve to rotate.

[0019] The utility model has the positive effects that the rotary core-pulling mechanism structure is optimized in design, the core-pulling action is flexible and smooth, the operation is stable, and the application in the laryngoscope blade injection mold can be beneficial to improving the production quality and production efficiency of the laryngoscope blade, and has good practicality and popularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the rotary core-pulling mechanism in the utility model;

[0022] Figure 2 for Figure 1 A top view of the rotary core pulling mechanism shown;

[0023] Figure 3 For along Figure 2 Sectional view cut along line AA;

[0024] Figure 4 For along Figure 2 Sectional view cut along the midline BB;

[0025] Figure 5 It is a schematic diagram of the structure of the base, the core-pulling block and the connecting block in the utility model when they are matched;

[0026] Figure 6 for Figure 5 Exploded view of the assembly shown;

[0027] Figure 7 It is a structural schematic diagram of the injection mold of the laryngoscope blade in the utility model.

[0028] The reference numerals shown in the figure are: 1-rotational drive mechanism; 11-rifle rod; 12-internal threaded sleeve; 121-stop step; 122-convex ring; 13-connecting block; 131-collar portion; 132-first screw; 14-base; 141-first embedding groove; 142-second embedding groove; 143-convex edge; 15-bearing; 16-baffle; 17-positioning key strip; 2-core pulling block; 21-fixing portion; 22-arc block portion; 23-second screw; 3-conical insert; 4-conical slot; 5-lower mold; 6-upper mold. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present utility model are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In the present utility model, unless otherwise clearly specified and limited, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0032] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] In the first aspect, an embodiment of the utility model provides a rotary core-pulling mechanism, which is suitable for producing an injection mold for a laryngoscope blade, and comprises a rotary drive mechanism 1 and a core-pulling block 2, wherein the core-pulling block 2 is driven to rotate by the rotary drive mechanism 1.

[0034] like Figures 1 to 7As shown, the rotary drive mechanism 1 includes a rifle rod 11, an internally threaded sleeve 12, a connecting block 13, a base 14 and a bearing 15; the surface of the rifle rod 11 is provided with threads, the internally threaded sleeve 12 is sleeved on the outside of the rifle rod 11 and forms a threaded fit with the rifle rod 11, the connecting block 13 is fixed on the outside of the internally threaded sleeve 12, and the base 14 is fixed on the connecting block 13, the core pulling block 2 has a fixing portion 21 fixedly connected to the base 14 and an arc block portion 22 matching the inner cavity shape of the component to be formed (such as a laryngoscope blade), and the center of the arc block portion 22 is on the central axis of the rifle rod 11; the bearing 15 is sleeved on the outside of the internally threaded sleeve 12. The structure of the rotary core-pulling mechanism is optimized in design, and the core-pulling action is flexible and smooth, and the operation is stable, which is beneficial to improving the production quality and production efficiency of laryngoscope blades; specifically, when pulling the core, the rifle rod 11 is driven to move axially, and then under the action of the thread cooperation between the rifle rod 11 and the internally threaded sleeve 12, the internally threaded sleeve 12 is driven to rotate a certain angle by controlling the axial movement stroke of the rifle rod 1, and during the rotation process, the connecting block 13 and the base 14 fixedly connected thereto and the core-pulling block 2 are driven to rotate to achieve core pulling.

[0035] In some embodiments, a collar portion 131 is provided on the connection block 13 , and the collar portion 131 is sleeved and locked with the upper end of the internally threaded sleeve 12 , so that the connection block 13 is fixedly connected to the internally threaded sleeve 12 .

[0036] See also Figure 3 As shown, in some embodiments, an upward stop step 121 is provided on the outer part of the upper end of the internally threaded sleeve 12, the collar portion 131 is sleeved on the upper end of the internally threaded sleeve 12 and the lower edge of the collar portion 131 abuts against the stop step 121, and a baffle 16 is fixed on the upper end of the internally threaded sleeve 12 to limit the collar portion 131 downward; and a positioning key strip 17 is provided between the collar portion 131 and the internally threaded sleeve 12 and is limited by the baffle 16. During assembly, the collar portion 131 is first sleeved on the outer part of the upper end of the internally threaded sleeve 12, and the positioning key strip 17 is inserted into the keyway between the collar portion 131 and the internally threaded sleeve 12 to achieve circumferential positioning, and then the collar portion 131 and the positioning key strip 17 are axially positioned by fixing the baffle 16 on the upper end of the internally threaded sleeve 12 to ensure that the connecting block 13 is firmly fixed on the internally threaded sleeve 12.

[0037] See also Figure 3As shown, in some embodiments, a convex ring 122 is provided on the outer peripheral wall of the internally threaded sleeve 12, and the bearings 15 are installed on the outer side of the internally threaded sleeve 12 in contact with the upper and lower sides of the convex ring 122. When the rotary core-pulling mechanism is installed, it is fixedly connected to the lower mold through the above-mentioned bearings, so as to achieve axial positioning of the internally threaded sleeve 12, ensuring that the internally threaded sleeve 12 can only rotate flexibly but not move axially, thereby ensuring the core pulling accuracy of the core pulling block 2.

[0038] See also Figure 5 and Figure 6 As shown, in some embodiments, the base 14 is provided with a first embedding groove 141, and the end of the connecting block 13 is embedded in the first embedding groove 141 and fixed by a first screw 132. The first embedding groove 141 matches the end of the connecting block 13 to play a positioning role, and then is locked with the first screw 13 to ensure that the base 14 and the connecting block 13 are reliably fixed.

[0039] In some embodiments, the base 14 is provided with a second embedding groove 142, and the fixing part 21 is embedded in the second embedding groove 142 and fixed by a second screw 23; the second embedding groove 142 matches the end of the fixing part 21 to play a positioning role, and then is locked with the second screw 23 to ensure that the core pulling block 2 and the base 14 are reliably fixed.

[0040] In some embodiments, a matching conical socket 3 and a conical slot 4 are provided on the joint surface of the base 14 and the fixed portion 21, and the plugging direction of the conical socket 3 and the conical slot 4 is the same direction as the second screw 23. The cross-sectional shapes of the conical socket 3 and the conical slot 4 are matching polygons. When the second screw 23 is tightened, the conical socket 3 and the conical slot 4 form a tight fit, thereby making the fixation between the base 14 and the fixed portion 21 more stable, thereby improving the positioning accuracy of the core pulling block 2.

[0041] In some embodiments, the outer edge of the base 14 is provided with a flange 143 protruding outward, and the flange 143 cooperates with the arc-shaped slide groove on the lower mold of the injection mold to limit the base 14 and further ensure the stability of the base 14 movement.

[0042] In some embodiments, the base 14 and the core pulling block 2 are provided with interconnected cooling pipelines, and a cooling pipeline interface is provided on the base 14. When installed and used, the external cooling water circuit is connected through the cooling pipeline interface. During injection molding production, the core pulling block 2 can be quickly cooled by passing cooling water into the cooling pipeline, which is beneficial to improving the injection molding quality of the product.

[0043] Second, see Figure 7As shown, an embodiment of the utility model provides a laryngoscope blade injection mold, comprising a lower mold 5 and an upper mold 6 cooperating with the lower mold 5, the lower mold 5 is equipped with any of the above-mentioned rotating core-pulling mechanisms, the part to be molded is a laryngoscope blade, the internally threaded sleeve 12 is rotatably connected to the lower mold 5 through the bearing 15, the lower end of the rifle rod 11 is used to connect to an external driving mechanism, and is suitable for driving the rifle rod 11 to move up and down relative to the lower mold 5 through the external driving mechanism, thereby driving the internally threaded sleeve 12 to rotate, and the external driving mechanism adopts a linear driving mechanism, such as an oil cylinder, an air cylinder, etc.; the injection mold has all the advantages of the rotating core-pulling mechanism in the above-mentioned embodiments and has good practicality.

[0044] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A rotary core-pulling mechanism, comprising a rotary drive mechanism (1) and a core-pulling block (2), wherein the core-pulling block (2) is driven to rotate by the rotary drive mechanism (1); characterized in that: The rotary drive mechanism (1) comprises a rifle rod (11), an internally threaded sleeve (12), a connecting block (13), a base (14) and a bearing (15); The internal threaded sleeve (12) is sleeved on the outside of the rifle rod (11) and forms a threaded fit with the rifle rod (11); the connecting block (13) is fixed on the outside of the internal threaded sleeve (12), and the base (14) is fixed on the connecting block (13); the core pulling block (2) has a fixing portion (21) fixedly connected to the base (14) and an arc-shaped block portion (22) matching the shape of the inner cavity of the part to be formed, and the center of the arc-shaped block portion (22) is located on the central axis of the rifle rod (11); The bearing (15) is sleeved on the outside of the internal thread sleeve (12).

2. The rotary core-pulling mechanism according to claim 1, characterized in that: The connection block (13) is provided with a collar portion (131), and the collar portion (131) is sleeved and locked with the upper end of the internal thread sleeve (12).

3. The rotary core-pulling mechanism according to claim 2, characterized in that: An upward stop step (121) is provided on the outer portion of the upper end of the internally threaded sleeve (12); the collar portion (131) is sleeved on the upper end of the internally threaded sleeve (12) and the lower edge of the collar portion (131) abuts against the stop step (121); a baffle (16) is fixed to the upper end of the internally threaded sleeve (12) for restraining the collar portion (131) downward; a positioning key strip (17) is inserted between the collar portion (131) and the internally threaded sleeve (12) and is restrained and limited by the baffle (16).

4. The rotary core-pulling mechanism according to claim 1, characterized in that: A convex ring (122) is provided on the outer peripheral wall of the internally threaded sleeve (12), and the bearing (15) is mounted on the outer side of the internally threaded sleeve (12) on both upper and lower sides of the convex ring (122) in contact with each other.

5. The rotary core-pulling mechanism according to claim 1, characterized in that: The base (14) is provided with a first embedding groove (141), and the end of the connecting block (13) is embedded in the first embedding groove (141) and fixed by a first screw (132).

6. The rotary core-pulling mechanism according to claim 1, characterized in that: The base (14) is provided with a second embedding groove (142), and the fixing portion (21) is embedded in the second embedding groove (142) and fixed by a second screw (23).

7. The rotary core-pulling mechanism according to claim 6, characterized in that: The joint surface between the base (14) and the fixing portion (21) is provided with a matching conical insert (3) and a conical slot (4), and the plugging direction of the conical insert (3) and the conical slot (4) is the same as that of the second screw (23), and the cross-sectional shapes of the conical insert (3) and the conical slot (4) are matching polygons.

8. The rotary core-pulling mechanism according to any one of claims 1 to 7, characterized in that: The outer edge of the base (14) is provided with a convex edge (143) protruding outwards.

9. The rotary core-pulling mechanism according to any one of claims 1 to 7, characterized in that: The base (14) and the core-pulling block (2) are provided with interconnected cooling pipelines, and a cooling pipeline interface is provided on the base (14).

10. A laryngoscope blade injection mold, comprising a lower mold (5) and an upper mold (6) cooperating with the lower mold (5), the lower mold (5) being provided with a rotating core-pulling mechanism according to any one of claims 1 to 9, the part to be molded being a laryngoscope blade, the internally threaded sleeve (12) being rotatably connected to the lower mold (5) via the bearing (15), the lower end of the rifle rod (11) being used for connecting to an external driving mechanism, and being suitable for driving the rifle rod (11) to move up and down relative to the lower mold (5) via the external driving mechanism, thereby driving the internally threaded sleeve (12) to rotate.

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