Production mold with internal thread shell
Through the threaded connection of the die core to the base and the driving structure of the gear rack, the problem of unstable rotation of the die core is solved, and the stable production of internal thread products and high-quality mold release is achieved.
Patent Information
- Application Number
- CN202422301294.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-20
AI Technical Summary
When existing molds produce internal thread products, the rotating of the die core is unstable, resulting in unstable product size and affecting quality.
The die core is threaded to the base, and the die core is driven to rotate by driving the cylinder, rack and driving gear structure to ensure the stability of the die core during the rotation process, and automatically separate through the water outlet after opening the mold.
It improves the production stability and quality of internal thread products, ensures the dimensional consistency of the product, and simplifies the mold release process.
Smart Images
Figure CN223131251U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of molds, and particularly to a production mold with an internally threaded housing. Background Art
[0002] In the injection production process of products, products are formed by molds. For products with internal threads, in order to improve the production efficiency of products, molds corresponding to the internal threads are set. During the injection process, the internal threads required for the products are directly produced. However, at this time, when the mold is opened, the corresponding mold core needs to be spirally separated from the internal threads of the products. Therefore, the mold core needs to rotate. However, in the prior art, the mold core is basically only driven by a gear-rack structure, and the mold core may be unstable during the rotation process, resulting in unstable product dimensions and affecting the quality of the products. Summary of the Utility Model
[0003] Based on this, it is necessary to provide a production mold with an internally threaded housing for the problems in the prior art.
[0004] A production mold with an internally threaded housing, characterized in that it includes a lower mold and an upper mold. The lower mold is provided with a mold core. The top of the mold core is provided with an external thread adapted to the internal thread of the product. The lower mold is provided with a base, and the mold core is threadedly connected to the base. A driven gear is provided on the lower side of the mold core. The lower mold is also provided with a rotating driving gear. The driving gear is rotatably arranged in the lower mold through a rotating shaft. A small gear is also provided on the outer side of the rotating shaft. The lower mold is also provided with a rack meshing with the small gear. A driving cylinder is provided on the outer side of the lower mold through a bracket, and the piston rod of the driving cylinder is connected to the rack.
[0005] In one embodiment, the lower mold includes a bottom plate, the base is fixed on the upper side of the bottom plate, and an internal thread adapted to the lower end of the mold core is provided on the upper side of the base.
[0006] In one embodiment, the lower mold further includes a middle plate. The middle plate is located on the upper side of the bottom plate. The middle plate is provided with a first cavity for accommodating the driving gear, a middle vertical hole for accommodating the mold core, and a second cavity for accommodating the rack. The first cavity is communicated with the middle vertical hole, and the first cavity is communicated with the second cavity.
[0007] In one embodiment, the lower mold further includes an upper plate. The upper plate is located on the upper side of the middle plate. The upper plate is provided with an upper vertical hole for accommodating the mold core. A guide sleeve adapted to the mold core is provided in the upper vertical hole. Bearings are provided on the lower side of the upper plate and the upper side of the bottom plate. The upper and lower ends of the rotating shaft of the driving gear are rotatably connected to the upper plate and the lower plate through the bearings.
[0008] In one embodiment, the upper mold is provided with a sprue extrusion structure, which is located above the sprue. When the upper mold and the lower mold are opened, the sprue extrusion structure extrudes the sprue from the lower side of the upper mold.
[0009] In one embodiment, the sprue extrusion structure includes an extrusion rod. The upper mold is provided with an upper receiving groove for accommodating the extrusion rod. An elastic member is provided on the upper side of the extrusion rod. The upper mold moves up and down in the upper receiving cavity. When the upper mold and the lower mold are closed, the elastic member is compressed.
[0010] In one embodiment, the upper receiving groove is provided with a stepped portion, and the top of the extrusion rod is provided with a protruding portion adapted to the stepped portion. When the extrusion rod is extruded to the lower side of the lower mold under the action of the elastic member, the protruding portion of the extrusion rod abuts against the stepped portion, restricting the extrusion rod from moving out of the upper receiving groove.
[0011] In one embodiment, an arc portion is provided on the lower side of the extrusion rod, and the arc portion contacts a part of the upper side of the sprue.
[0012] In one embodiment, there are two mold cores, which are located on both sides of the gate, and the extrusion rods are located on different sides of the sprue.
[0013] For the above production mold with an internally threaded housing, at this time, the mold core is arranged at the lower mold position through threaded connection. Under the action of the driving cylinder, the mold core is driven to rotate through the rack and the driving gear, so as to generate the internal thread of the product. After the mold is opened, the mold core moves downward, and the mold core rotates and separates from the product. At this time, the mold core is supported by threaded connection through the base, which can ensure the stability of the mold core and thus ensure the production quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a schematic diagram of the overall structure of the production mold with an internally threaded housing of the present utility model;
[0015] Figure 2 is a schematic diagram of the internal structure of the production mold with an internally threaded housing of the present utility model;
[0016] Wherein, 1. Lower mold; 11. Bottom plate; 12. Middle plate; 13. Upper plate; 14. Guide sleeve; 2. Upper mold; 3. Mold core; 31. Driven gear; 4. Base; 51. Driving gear; 52. Pinion gear; 53. Rack; 54. Driving cylinder; 6. Sprue extrusion structure; 61. Extrusion rod; 62. Elastic member; 611. Arc portion. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.
[0018] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.
[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0020] Such as Figures 1 to 2 , a production mold with an internally threaded housing, characterized in that it includes a lower mold 1 and an upper mold 2. The lower mold 1 is provided with a mold core 3. The top of the mold core 3 is provided with an external thread adapted to the internal thread of the product. The lower mold 1 is provided with a base 4. The mold core 3 is threadedly connected to the base 4. A driven gear 31 is provided on the lower side of the mold core 3. The lower mold 1 is also provided with a rotating driving gear 51. The driving gear 51 is rotatably arranged in the lower mold 1 through a rotating shaft. A small gear 52 is also provided on the outer side of the rotating shaft. The lower mold 1 is also provided with a rack 53 meshing with the small gear 52. A driving cylinder 54 is provided on the outer side of the lower mold 1 through a bracket. The piston rod of the driving cylinder 54 is connected to the rack 53.
[0021] At this time, the mold core 3 is arranged at the position of the lower mold 1 through threaded connection. Under the action of the driving cylinder 54, the mold core 3 is driven to rotate through the rack 53 and the driving gear 51, so as to generate the internal thread of the product. After mold opening, the mold core 3 moves downward, and the mold core 3 rotates and separates from the product. At this time, the mold core 3 is supported by threaded connection with the base 4, which can ensure the stability of the mold core 3 and thus ensure the production quality of the product.
[0022] In this embodiment, in order to enable the core 3 to rotate within the lower mold 1, at this time, the lower mold 1 includes a bottom plate 11, the base 4 is fixed on the upper side of the bottom plate 11, and an internal thread for threadedly connecting with the lower end of the core 3 is provided on the upper side of the base 4. The base 4 is fixed on the upper side of the bottom plate 11, and the base 4 is fixed on the upper side of the bottom plate 11 by fasteners. Then, an internal thread is provided on the upper side of the base 4. At this time, the base 4 is provided with a cavity for accommodating the core 3, and the core 3 is fixed to the base 4 through threaded connection on the upper side of the base 4. During the rotation of the core 3, the lower end of the core 3 moves up and down within the cavity of the base 4, thereby ensuring the stability of the core 3 during rotation and, under the action of the driving gear 51, moving up and down during rotation. At the start of injection molding, the core 3 is moved to the highest point position. After the plunger, the flowing raw material is outside the core 3 and forms a product with the upper mold 2. An internal thread that is threadedly connected to the external thread can be formed on the inner side of the product, thereby completing the production of the internal thread of the product. After the product injection molding is completed, the core 3 rotates. Since the lower end of the core 3 is threadedly connected to the base 4, therefore, the core 3 also moves downward when rotating, and then the external thread on the upper side of the core 3 is screwed out from the inner side of the product. Before mold opening, the core 3 can be screwed out downward, thereby completing the production and demolding of the internal thread of the product.
[0023] Since the core 3 is driven to rotate by the driving gear 51, in this embodiment, the lower mold 1 further includes a middle plate 12. The middle plate 12 is located on the upper side of the bottom plate 11. The middle plate 12 is provided with a first cavity for accommodating the driving gear 51, a middle vertical hole for accommodating the core 3, and a second cavity for accommodating the rack 53. The first cavity communicates with the middle vertical hole, and the first cavity communicates with the second cavity. At this time, the driving gear 51 is located in the first cavity, the core 3 is located in the middle vertical hole, and the driven gear 31 on the outside of the core 3 is located in the middle vertical hole. The driving gear 51 is in meshing engagement with the driven gear 31. A pinion gear 52 is further provided on the lower side of the driving gear 51. The pinion gear 52 is in meshing engagement with the rack 53 in the second cavity. In this way, during the movement of the rack 53, the pinion gear 52 rotates, thereby causing the coaxial driving gear 51 to rotate, driving the engaged driven gear 31 to rotate, and finally driving the core 3 to rotate. Therefore, at this time, under the action of the driving cylinder 54, the rack 53 moves horizontally, thereby driving the pinion gear 52 to rotate, and the coaxial driving gear 51 rotates synchronously, driving the engaged driven gear to rotate, and finally causing the core 3 to rotate.
[0024] To ensure the stability of the driving gear 51 and the pinion gear 52 during rotation, the lower mold 1 further includes an upper plate 13. The upper plate 13 is located above the middle plate 12. The upper plate 13 is provided with an upper vertical hole for accommodating the mold core 3. A guide sleeve 14 adapted to the mold core 3 is provided in the upper vertical hole. Bearings are provided on the lower side of the upper plate 13 and the upper side of the bottom plate 11. The upper and lower ends of the rotating shaft of the driving gear 51 are rotationally connected to the upper plate 13 and the lower plate through bearings. By arranging the guide sleeve 14 in the upper vertical hole and connecting the mold core 3 to the upper plate 13 through the guide sleeve 14, the stability of the mold core 3 during the up and down movement can be improved. At the same time, by arranging bearings on the upper plate 13 and the bottom plate 11 for positioning the rotating shaft, the stability of the rotating shaft, the driving gear 51 and the pinion gear 52 during rotation can be ensured, thereby ensuring that the mold core 3 will not have axial offset during rotation and up and down movement.
[0025] After the injection molding is completed, during the mold opening process, the product is connected to the gate through the sprue. When the mold opens, the product and the upper mold 2 move upward together. In order to separate the product from the upper mold 2, in this embodiment, the upper mold 2 is provided with a sprue extrusion structure 6. The sprue extrusion structure 6 is located above the sprue. When the upper mold 2 and the lower mold 1 are opened, the sprue extrusion structure 6 extrudes the sprue from the lower side of the upper mold 2.
[0026] Specifically, in this embodiment, the sprue extrusion structure 6 includes an extrusion rod 61. The upper mold 2 is provided with an upper accommodating groove for accommodating the extrusion rod 61. An elastic member 62 is provided on the upper side of the extrusion rod 61. The upper mold 2 moves up and down in the upper accommodating cavity. When the upper mold 2 and the lower mold 1 are closed, the elastic member 62 is compressed. Under the action of the elastic member 62, the extrusion rod 61 moves downward. Therefore, after the mold is opened, the extrusion rod 61 extrudes the sprue located on the lower side, so that the product, the sprue and the gate are separated from the lower side of the upper mold 2, thus completing the automatic separation of the product after the mold is opened.
[0027] Since the elastic member 62 is in a compressed state, in order to prevent the extrusion rod 61 from falling out of the upper mold 2 under the action of the elastic member 62 after the mold is opened, in this embodiment, the upper accommodating groove is provided with a stepped portion, and the top of the extrusion rod 61 is provided with a convex portion adapted to the stepped portion. When the extrusion rod 61 is extruded to the lower side of the lower mold 1 under the action of the elastic member 62, the convex portion of the extrusion rod 61 abuts against the stepped portion, restricting the extrusion rod 61 from moving out of the upper accommodating groove. Under the left, right and lower sides of the stepped portion, the extrusion rod 61 abuts against the stepped portion through the convex portion, thereby preventing the extrusion rod 61 from moving out of the upper mold 2 under the action of the elastic member 62.
[0028] Further, during the process of ejecting the sprue, in order to prevent the sprue from getting stuck under the ejecting rod 61, an arc-shaped portion 611 is provided on the lower side of the ejecting rod 61, and the arc-shaped portion 611 contacts the upper side portion of the sprue. At this time, the arc-shaped portion 611 contacts the upper side portion of the sprue, which can avoid the clamping between the ejecting rod 61 and the sprue, and thus the sprue can be directly ejected.
[0029] After the lower side of the ejecting rod 61 is provided with the arc-shaped portion 611, only a part of the ejecting rod 61 contacts the sprue. In order to ensure the balance during the sprue ejection process, in this embodiment, there are two mold cores 3, and the mold cores 3 are located on both sides of the gate, and the ejecting rod 61 is located on different sides of the sprue. At this time, the ejecting rod 61 is located on both sides of the sprue, so that the different sides of the sprue on both sides of the gate receive external forces, which can make the sprue better detach from the lower side of the upper mold 2.
[0030] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.
[0031] The above-described embodiments only represent several implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.
Claims
1. A production mold with an internally threaded housing, characterized in that, It includes a lower die and an upper die. The lower die is provided with a die core. The top of the die core is provided with an external thread adapted to the internal thread of the product. The lower die is provided with a base. The die core is threadedly connected to the base. A driven gear is provided on the lower side of the die core. The lower die is also provided with a rotating driving gear. The driving gear is rotatably arranged in the lower die through a rotating shaft. A small gear is also provided on the outer side of the rotating shaft. The lower die is also provided with a rack meshing with the small gear. A driving cylinder is provided on the outer side of the lower die through a bracket. The piston rod of the driving cylinder is connected to the rack.
2. The production mold with an internally threaded housing according to claim 1, characterized in that, The lower die includes a bottom plate. The base is fixed on the upper side of the bottom plate. An internal thread for threadedly connecting the lower end of the die core is provided on the upper side of the base.
3. The production mold with an internally threaded housing according to claim 2, characterized in that, The lower die also includes a middle plate. The middle plate is located on the upper side of the bottom plate. The middle plate is provided with a first cavity for accommodating the driving gear, a middle vertical hole for accommodating the die core, and a second cavity for accommodating the rack. The first cavity communicates with the middle vertical hole. The first cavity communicates with the second cavity.
4. The production mold with an internally threaded housing according to claim 3, characterized in that, The lower die also includes an upper plate. The upper plate is located on the upper side of the middle plate. The upper plate is provided with an upper vertical hole for accommodating the die core. A guide sleeve adapted to the die core is provided in the upper vertical hole. Bearings are provided on the lower side of the upper plate and the upper side of the bottom plate. The upper and lower ends of the rotating shaft of the driving gear are rotatably connected to the upper plate and the lower plate through the bearings.
5. The production mold with an internally threaded housing according to any one of claims 1 to 4, characterized in that, The upper die is provided with a gate extrusion structure. The gate extrusion structure is located on the upper side of the gate. When the upper die and the lower die are opened, the gate extrusion structure extrudes the gate from the lower side of the upper die.
6. The production mold with an internally threaded housing according to claim 5, characterized in that, The gate extrusion structure includes an extrusion rod. The upper die is provided with an upper accommodating groove for accommodating the extrusion rod. An elastic member is provided on the upper side of the extrusion rod. The upper die moves up and down in the upper accommodating cavity. When the upper die and the lower die are closed, the elastic member is compressed.
7. The production mold with an internally threaded housing according to claim 6, characterized in that, The upper accommodating groove is provided with a stepped portion. A protruding portion adapted to the stepped portion is provided on the top of the extrusion rod. When the extrusion rod is extruded to the lower side of the lower die under the action of the elastic member, the protruding portion of the extrusion rod abuts against the stepped portion, restricting the extrusion rod from moving out of the upper accommodating groove.
8. The production mold with an internally threaded housing according to claim 7, characterized in that, An arc portion is provided on the lower side of the extrusion rod. The arc portion contacts a part of the upper side of the gate.
9. The production mold with an internally threaded housing according to claim 8, characterized in that, There are two die cores. The die cores are located on both sides of the gate. The extrusion rods are located on different sides of the gate.