Split type lower die convenient to trim in hollow blow molding die
By setting a sliding clamping structure of limit blocks and side sliders on the outer side walls of the female mold and the child mold, combined with the oil cylinder drive, the wear problem of hollow blow mold is solved, convenient maintenance and high-precision mold clamping are achieved, and side wall damage is avoided.
Patent Information
- Application Number
- CN202422058477.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-23
AI Technical Summary
The connection method of the existing hollow blow molding master mold and the sub-mold is easily worn, resulting in a decrease in mold clamping accuracy, and the replacement of guide columns and guide holes is cumbersome, which can easily damage the side walls of the master mold and the sub-mold.
The limit block and side slider are arranged on the outer side walls of the master mold and the child mold. The guide is achieved through the sliding clamping of the limit block and the side slider. The sub-mold is driven by the oil cylinder to close and release the mold. The limit block and side slider can be quickly replaced or repaired to avoid wear and affecting the mold clamping accuracy.
The installation and maintenance process of the master and child molds is simplified, and the damage to the side walls is avoided by wear, and the mold clamping accuracy and sealing are maintained, which improves the convenience and efficiency of maintenance.
Smart Images
Figure CN223058348U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of molds, in particular to a split lower mold which is convenient for trimming in a hollow blow molding mold. Background Art
[0002] When producing large plastic barrels, it is necessary to use a hollow blow molding mold to complete. At present, the hollow blow molding molds used in the market for producing large plastic barrels include: a complete upper mold and a split lower mold. In the lower mold, there are a female mold and a male mold. When blow molding, the female mold and the male mold are combined to form a complete lower mold, and then the upper mold and the lower mold are closed to form a complete molding cavity. The blowing mandrel with a molten blank tube extends into the molding cavity through the blow molding port for blow molding. After blow molding, the upper and lower molds are opened, and the molded plastic barrel is limited and clamped in the lower mold. Then, the female mold and the male mold are separated, and the molded plastic barrel can be taken out. At present, the connection method between the female mold and the male mold in the split lower mold on the market is to set a plurality of guide posts on the front side wall of the female mold, and a plurality of guide holes that can cooperate with the guide posts are provided on the rear side wall of the male mold. The female mold and the male mold are accurately guided through the guiding relationship between the guide posts and the guide holes. However, there is a defect in this way. The guide posts and the guide holes will be worn after long-term friction, which will affect the closing accuracy between the female mold and the male mold. When the guide posts and the guide holes are worn, the guide posts and the guide holes need to be replaced. And the guide posts and the guide holes are located inside the female mold and the male mold, which is not only cumbersome to replace, but also easy to cause damage to the front side wall of the female mold or the rear side wall of the male mold, affecting the fitting tightness between the side walls that cooperate with each other when the female mold and the male mold are closed. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a split lower mold which is convenient for trimming in a hollow blow molding mold, with a simple guiding structure, convenient for trimming and not causing damage to the side walls that cooperate with each other between the female mold and the male mold.
[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a split lower mold which is convenient for trimming in a hollow blow molding mold, including: a template, a female mold and a male mold. Two long strip guide blocks are arranged in parallel on the template. The female mold is clamped on the two long strip guide blocks and fixedly connected with the template. The male mold is slidably arranged on the template and slidably clamped with the two long strip guide blocks. A blow molding port and an open female cavity are arranged on the female mold. An open male cavity that can be aligned with the open female cavity is arranged on the male mold. A side sliding groove is respectively arranged on the left and right outer side walls of the female mold. A limiting groove communicated with the side sliding groove is respectively arranged on the upper and lower sides of the side sliding groove. A limiting block is arranged in the limiting groove. The two limiting blocks on the same side are parallel to each other and both extend into the side sliding groove. An installation groove is respectively arranged on the left and right outer side walls of the male mold. A side sliding strip is fixedly connected in the installation groove. The side sliding strip extends into the corresponding side sliding groove. The two limiting blocks on the same side respectively abut against the upper and lower side walls of the side sliding strip. The male mold is connected with an oil cylinder.
[0005] Furthermore, in the split lower mold of the above-mentioned hollow blow mold that is convenient for trimming, a heightening seat is arranged on the template located on the front side of the sub-mold. The oil cylinder is fixed on the heightening seat. The central axis of the piston rod in the oil cylinder coincides with the central axis of the sub-mold, and the piston rod is connected to the front side wall of the sub-mold.
[0006] Furthermore, in the split lower mold of the above-mentioned hollow blow mold that is convenient for trimming, an oil cylinder is respectively arranged at the central positions of the left and right side walls of the master mold. The central axis of the piston rod in the oil cylinder is horizontally parallel to the central axes of the sub-mold and the master mold. A pull block is respectively arranged at the central positions of the left and right side walls of the sub-mold. The piston rod in the oil cylinder is connected to the center of the pull block on the same side.
[0007] Furthermore, in the split lower mold of the above-mentioned hollow blow mold that is convenient for trimming, two first key grooves are respectively arranged on the left and right side walls of the master mold. A long key groove is arranged on the oil cylinder. A first positioning key is clamped in the two first key grooves. The first positioning key protrudes from the first key groove. The long key groove on the oil cylinder is clamped on the two first positioning keys on the same side. A clamping groove is respectively arranged on the left and right side walls of the sub-mold. The pull block is clamped and fixed in the clamping groove.
[0008] Furthermore, in the split lower mold of the above-mentioned hollow blow mold that is convenient for trimming, the specific connection structure between the side slide bar and the installation groove is as follows: the upper and lower end walls at the front end of the side slide bar respectively abut against the inner top wall and the inner bottom wall of the installation groove, the front end wall of the side slide bar abuts against the inner front wall of the installation groove. The side slide bar and the installation groove are connected by two horizontally arranged second inner hexagon bolts. Two positioning pins are arranged between the two second inner hexagon bolts. The two positioning pins are symmetrically arranged above and below the horizontal center line of the side slide bar.
[0009] Furthermore, in the split lower mold of the above-mentioned hollow blow mold that is convenient for trimming, a fillet is arranged on the rear end wall of the side slide bar.
[0010] Furthermore, in the split lower mold of the above-mentioned hollow blow mold that is convenient for trimming, second key grooves are respectively arranged at the left and right ends of the front side wall of the master mold. A second positioning key is arranged in the second key groove. The second positioning key protrudes from the second key groove. Third key grooves that can cooperate with the second positioning key are respectively arranged at the left and right ends of the rear side wall of the sub-mold.
[0011] Further, in the split lower mold of the above-mentioned hollow blow molding mold that is convenient for trimming, the specific connection structure between the limit block and the female mold is as follows: a first threaded hole is respectively arranged at both ends of the limit groove, three first spring grooves are equidistantly and spacedly arranged on the inner top wall of the limit groove, a long strip countersunk hole is respectively arranged at both ends of the limit block, a first hexagon socket head bolt is movably inserted through the long strip countersunk hole, the first hexagon socket head bolt is threadedly connected to the corresponding first threaded hole, three second spring grooves are equidistantly and spacedly arranged on the top wall of the limit block, a cylindrical spring is arranged in each second spring groove, and the cylindrical spring is snapped into the corresponding first spring groove.
[0012] Further, in the split lower mold of the above-mentioned hollow blow molding mold that is convenient for trimming, a threaded hole is arranged in the limit groove between every two adjacent first spring grooves, a guide post is threadedly connected in the threaded hole, a guide hole is arranged in the limit block between every two adjacent second spring grooves, and the guide post is movably snapped into the corresponding guide hole.
[0013] The advantages of the present utility model are as follows: the limit block and the side sliding strip are respectively arranged on the left and right outer side walls of the female mold and the male mold, which reduces the installation difficulty and optimizes the installation structure. If wear occurs between the side sliding strip and the limit block, since the limit block and the side sliding strip are respectively arranged on the outer side walls of the female mold and the male mold, only the first hexagon socket head bolt on the limit block and the second hexagon socket head bolt on the side sliding strip need to be loosened, and then the worn limit block or side sliding strip can be disassembled and replaced or repaired, which is convenient and fast, and will not damage the front side wall of the female mold and the rear side wall of the male mold, and will not affect the fitting tightness between the front side wall of the female mold and the rear side wall of the male mold when the female mold and the male mold are closed. Description of the Drawings
[0014] Figure 1 is a schematic structural diagram of the first embodiment of the split lower mold of the hollow blow molding mold described in the present utility model that is convenient for trimming.
[0015] Figure 2 is Figure 1 the schematic structural diagram of the female mold in
[0016] Figure 3 is Figure 1 the schematic structural diagram of the male mold after rotating 180° horizontally in
[0017] Figure 4 is a schematic structural diagram of the second embodiment of the split lower mold of the hollow blow molding mold described in the present utility model that is convenient for trimming.
[0018] Figure 5 is a schematic structural diagram of the third embodiment of the split lower mold of the hollow blow molding mold described in the present utility model that is convenient for trimming.
[0019] Figure 6It is a schematic structural diagram of the fourth embodiment of the split lower mold that is convenient for trimming in the hollow blow molding mold described in the present utility model.
[0020] Figure 7 It is Figure 6 a schematic cross-sectional structural diagram in the A-A direction in
[0021] Figure 8 It is Figure 6 a schematic enlarged partial structural diagram in the B direction in Specific implementation manners
[0022] The technical solution described in the present utility model will be further described below in conjunction with the accompanying drawings and preferred embodiments.
[0023] Embodiment 1
[0024] As Figures 1 to 3As shown in the figure, the split lower mold of the hollow blow molding mold of the present utility model that is convenient for trimming includes: a template 1, a female mold 2 and a male mold 3. Two long strip guide blocks 11 are arranged in parallel on the template 1. The long strip guide blocks 11 are connected by countersunk head bolts. The female mold 2 is clamped on the two long strip guide blocks 11 and fixedly connected to the template 1. The male mold 3 is slidably arranged on the template 1 and slidably clamped with the two long strip guide blocks 11. A blow molding port 21 and an open female cavity 22 are arranged on the female mold 2. Second key grooves 23 are respectively arranged at the left and right ends of the front side wall of the female mold 2. Second positioning keys 24 are arranged in the second key grooves 23. The second positioning keys 24 protrude from the second key grooves 23. An open male cavity 31 that can be aligned with the open female cavity 22 is arranged on the male mold 3. Third key grooves 32 that can cooperate with the second positioning keys 24 are respectively arranged at the left and right ends of the rear side wall of the male mold 3. A side sliding groove 25 is respectively arranged on the left and right outer side walls of the female mold 2. Limiting grooves 26 communicated with the side sliding groove 25 are respectively arranged on the upper and lower sides of the side sliding groove 25. Limiting blocks 4 are fixed in the limiting grooves 26 by first inner hexagon bolts 42. The two limiting blocks 4 on the same side are parallel to each other and both extend into the side sliding groove 25. An installation groove 33 is respectively arranged on the left and right outer side walls of the male mold 3. A side sliding strip 5 is fixedly connected in the installation groove 33. The upper and lower end walls of the front end of the side sliding strip 5 respectively abut against the inner top wall and the inner bottom wall of the installation groove 33. The front end wall of the side sliding strip 5 abuts against the inner front wall of the installation groove 33. The side sliding strip 5 and the installation groove 33 are connected by two horizontally arranged second inner hexagon bolts 51. Two positioning pins 52 are arranged between the two second inner hexagon bolts 51. The two positioning pins 52 are symmetrically arranged above and below the horizontal center line of the side sliding strip 5. In this way, the connection stability of the side sliding strip 5 in the installation groove 33 can be improved, and the side sliding strip 5 is not easy to shake in the installation groove 33. The side sliding strip 5 extends into the corresponding side sliding groove 25. The two limiting blocks 4 on the same side respectively abut against the upper and lower side walls of the side sliding strip 5. A fillet is arranged on the rear end wall of the side sliding strip 5. When the side sliding strip 5 is clamped into the two limiting blocks 4, the fillet on the side sliding strip 5 plays a role of anti-collision and guiding, facilitating the side sliding strip 5 to be smoothly clamped into the two limiting blocks 4. When blow molding is required, the male mold 3 moves along the long strip guide block 11 towards the female mold 2. The side sliding strip 5 on the male mold 3 conducts guiding movement between the two limiting blocks 4, thereby improving the matching accuracy between the male mold 3 and the female mold 2. When the male mold 3 and the female mold 2 are closed, the two third key grooves 32 on the male mold 3 are respectively engaged with the two second positioning keys 24 in the female mold 2. Then the upper mold descends and is closed with the lower mold formed by the combination of the male mold 3 and the female mold 2, and then blow molding is carried out. After the blow molding is completed, the upper mold rises and opens the mold, and the male mold 3 moves away from the female mold 2, and the finished product can be taken out from the lower mold that demolds the female mold 2 and the male mold 3.
[0025] If wear occurs between the side slider 5 and the limit block 4, since the limit block 4 and the side slider 5 are respectively arranged on the outer side walls of the female mold 2 and the male mold 3, only need to loosen the first hexagon socket head cap screw 42 on the limit block 4 and the second hexagon socket head cap screw 51 on the side slider 5, then the worn limit block 4 or side slider 5 can be disassembled and replaced or repaired. It is convenient and fast, and will not damage the front side wall of the female mold 2 and the rear side wall of the male mold 3, and will not affect the fitting tightness between the front side wall of the female mold 2 and the rear side wall of the male mold 3 when the female mold 2 and the male mold 3 are closed.
[0026] Embodiment 2
[0027] In order to enable the male mold 3 to automatically close and demold with the female mold 2, it is necessary to connect the male mold 3 with the oil cylinder 6. As Figure 4 shown, on the template 1 located in front of the male mold 3, there is a raised seat 12. The oil cylinder 6 is fixedly arranged on the raised seat. The central axis of the piston rod in the oil cylinder 6 coincides with the central axis of the male mold 3, and the piston rod is connected to the front side wall of the male mold 3. Driving the male mold 3 by the oil cylinder 6 can make the male mold 3 close or demold with the female mold 2 along the side slider 5 and the long guide block 11. Setting the central axis of the piston rod on the oil cylinder 6 to coincide with the central axis of the male mold 3 can make the thrust of the piston rod act on the central position of the front side wall of the male mold 3, so as to evenly distribute the thrust on the front side wall of the male mold 3, and can make the male mold 3 perform the closing and demolding movements more stably.
[0028] Embodiment 3
[0029] There is another connection method between the male mold 3 and the oil cylinder 6. As Figure 5 shown, there are two oil cylinders 6, which are respectively arranged at the central positions of the left and right side walls of the female mold 2. On the left and right side walls of the female mold 2, there are respectively two first keyways 27. On the oil cylinder 6, there is a long keyway 61. In the two first keyways 27, there is a first positioning key 271, and the first positioning key 271 protrudes from the first keyway 27. The long keyway 61 on the oil cylinder 6 is clamped on the two first positioning keys 271 on the same side and is fixedly connected to the female mold 2 through bolts, which improves the connection strength between the oil cylinder 6 and the female mold 2. The central axis of the piston rod in the oil cylinder 6 is horizontally parallel to the central axes of the male mold 3 and the female mold 2. On the central positions of the left and right side walls of the male mold 3, there is respectively a clamping groove 34. In the clamping groove 34, there is a pull block 35 clamped and fixed. The pull block 35 is fixedly connected to the male mold 3 through bolts, which improves the connection strength between the pull block 35 and the male mold 3. The piston rod in the oil cylinder 6 is connected to the center of the pull block 35 on the same side. When the two oil cylinders 6 act simultaneously, they can control the male mold 3 to close or demold with the female mold 2. Arranging the oil cylinders 6 on the left and right sides of the female mold 2 and connecting the oil cylinders 6 with the pull blocks 35 on the left and right sides of the male mold 3 can improve the matching accuracy between the male mold 3 and the female mold 2, and the simultaneous action of the two oil cylinders 6 can improve the running stability of the male mold 3.
[0030] Embodiment 4
[0031] After the limiting block 4 has been in friction with the side sliding bar 5 for a long time, a gap will appear between the limiting block 4 and the side sliding bar 5 due to wear. This will cause the loss of the precise guiding function between the limiting block 4 and the side sliding bar 5, and frequent trimming is required, which not only increases the workload but also increases the maintenance cost. To solve this problem, the connection structure between the limiting block 4 and the female mold 2 needs to be set as a structure with an automatic compensation function, such as Figures 6 to 8 As shown, a first threaded hole is respectively provided at both ends of the limiting groove 26. Three first spring grooves 261 are equidistantly and spacedly arranged on the inner top wall of the limiting groove 26. A long strip countersunk hole 41 is respectively provided at both ends of the limiting block 4. A first hexagon socket head bolt 42 is movably inserted through the long strip countersunk hole 41. The first hexagon socket head bolt 42 is threadedly connected to the corresponding first threaded hole. The limiting block 4 can slide up and down along the first hexagon socket head bolt 42 through the long strip countersunk hole 41. Three second spring grooves 43 are equidistantly and spacedly arranged on the top wall of the limiting block 4. A cylindrical spring 44 is arranged in each second spring groove 43. The cylindrical spring 44 is snapped into the corresponding first spring groove 261. Through the elastic force of the cylindrical spring 44, automatic compensation can be realized after the limiting block 4 or the side sliding bar 5 is worn, so that the limiting block 4 can always abut against the side sliding bar 5 and play a guiding role for the side sliding bar 5. A threaded hole is provided in the limiting groove 26 between every two adjacent first spring grooves 261. A guide post 262 is threadedly connected in the threaded hole. A guide hole 45 is provided in the limiting block 4 between every two adjacent second spring grooves 43. The guide post 262 is movably snapped into the corresponding guide hole 45. Through the limiting and guiding action of the guide hole 45 on the guide post 262, the situation that the limiting block 4 is displaced when being acted on by the horizontal friction force of the side sliding bar 5 can be prevented, so that the limiting block 4 can be stably arranged in the limiting groove 26.
[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present invention can still be modified or equivalently replaced, and any modification or equivalent replacement without departing from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.
Claims
1. Split-type lower mold for hollow blow molding mold, which is characterized in that: Including: A template, a master mold and a sub-mold. Two long guide blocks are arranged in parallel on the template. The master mold is clamped on the two long guide blocks and fixedly connected to the template. The sub-mold is slidably arranged on the template and slidably clamped with the two long guide blocks. A blow molding port and an open master cavity are arranged on the master mold. An open sub-cavity capable of being aligned with the open master cavity is arranged on the sub-mold. A side chute is respectively arranged on the left and right outer side walls of the master mold. A limiting groove communicated with the side chute is respectively arranged on the upper and lower sides of the side chute. A limiting block is arranged in the limiting groove. The two limiting blocks on the same side are parallel to each other and both extend into the side chute. An installation groove is respectively arranged on the left and right outer side walls of the sub-mold. A side slide bar is fixedly connected in the installation groove. The side slide bar extends into the side chute on the corresponding side. The two limiting blocks on the same side respectively abut against the upper and lower side walls of the side slide bar. The sub-mold is connected to an oil cylinder.
2. The split lower mold for a hollow blow molding die according to claim 1, which is convenient for trimming, is characterized in that: A heightening seat is arranged on the template located in front of the sub-mold. The oil cylinder is fixed on the heightening seat. The central axis of the piston rod in the oil cylinder coincides with the central axis of the sub-mold. The piston rod is connected to the front side wall of the sub-mold.
3. The split lower mold facilitating trimming in the hollow blow molding mold according to claim 1, characterized in that: An oil cylinder is respectively arranged at the central positions of the left and right side walls of the master mold. The central axis of the piston rod in the oil cylinder is horizontally parallel to the central axes of the sub-mold and the master mold. A pulling block is respectively arranged at the central positions of the left and right side walls of the sub-mold. The piston rod in the oil cylinder is connected to the center of the pulling block on the same side.
4. The split lower mold for hollow blow molding mold that is convenient for trimming according to claim 3, wherein: Two first key grooves are respectively arranged on the left and right side walls of the master mold. A long key groove is arranged on the oil cylinder. A first positioning key is clamped in the two first key grooves. The first positioning key protrudes from the first key groove. The long key groove on the oil cylinder is clamped on the two first positioning keys on the same side. A clamping groove is respectively arranged on the left and right side walls of the sub-mold. The pulling block is clamped and fixed in the clamping groove.
5. The split lower mold for a hollow blow molding die that is convenient for trimming according to any one of claims 1 to 4, characterized in that: The specific connection structure between the side slide bar and the installation groove is as follows: The upper and lower end walls at the front end of the side slide bar respectively abut against the inner top wall and the inner bottom wall of the installation groove. The front end wall of the side slide bar abuts against the inner front wall of the installation groove. The side slide bar and the installation groove are connected by two horizontally arranged second inner hexagon bolts. Two positioning pins are arranged between the two second inner hexagon bolts. The two positioning pins are symmetrically arranged above and below the horizontal center line of the side slide bar.
6. The split lower mold facilitating trimming in the hollow blow molding mold according to any one of claims 1 to 4, characterized in that: A fillet is arranged on the rear end wall of the side slide bar.
7. The split lower mold for a hollow blow molding die that is easy to trim according to any one of claims 1 to 4, characterized in that: Second key grooves are respectively arranged at the left and right ends of the front side wall of the master mold. A second positioning key is arranged in the second key groove. The second positioning key protrudes from the second key groove. Third key grooves capable of cooperating with the second positioning key are respectively arranged at the left and right ends of the rear side wall of the sub-mold.
8. The split lower mold facilitating trimming in the hollow blow molding mold according to any one of claims 1 to 4, characterized in that: The specific connection structure between the limiting block and the master mold is as follows: A first threaded hole is respectively arranged at both ends of the limiting groove. Three first spring grooves are equidistantly arranged at intervals on the inner top wall of the limiting groove. A long countersunk hole is respectively arranged at both ends of the limiting block. A first inner hexagon bolt is movably penetrated in the long countersunk hole. The first inner hexagon bolt is threadedly connected with the corresponding first threaded hole. Three second spring grooves are equidistantly arranged at intervals on the top wall of the limiting block. A cylindrical spring is arranged in each second spring groove. The cylindrical spring is clamped into the corresponding first spring groove.
9. The split lower mold facilitating trimming in the hollow blow molding mold according to claim 8, wherein: Threaded holes are provided in the limiting grooves between every two adjacent first spring grooves, guide posts are threadedly connected in the threaded holes, guide holes are provided in the limiting blocks between every two adjacent second spring grooves, and the guide posts are movably clamped in the corresponding guide holes.