Plastic hollow-out product preparation mold

Abstract

The invention discloses a plastic hollow-out product preparation mold, and relates to the technical field of hollow-out product preparation. The plastic hollowed-out product preparation mold comprises an outer mold body and an inner mold body, the inner mold body has a spliced first form and a split second form, when the inner mold body is in the first form, a groove structure is formed in the peripheral side surface of the inner mold body, and the groove structure and a mold cavity in the outer mold body are spliced to form an injection molding cavity for preparing a hollowed-out part; when injection molding of the hollowed-out part is completed, only the inner mold body needs to be split into the second form, so that the inner mold body in the split state can be moved out from the interior of the manufactured hollowed-out part, and compared with a traditional technological process that the hollowed-out part needs to be split into a plurality of parts and injection molding preparation is carried out separately, the production efficiency is remarkably improved; by adopting the preparation mold in the scheme, the finally prepared hollow-out part is kept as a whole, and compared with a traditional machining process, the whole hollow-out part has good attractiveness.

Description

Technical Field

[0001] The present invention relates to the technical field of hollow product preparation, and in particular to a mold for preparing a plastic hollow product. Background Art

[0002] Currently, when preparing some plastic products with a hollow interior and a hollow surface on the market, the plastic product is usually split into several parts, and the split parts are injection molded separately. After the injection molding is completed, the parts are bonded together with glue or assembled with auxiliary parts to splice the scattered parts into a whole, thereby preparing a plastic product with a cavity inside and a hollow surface. The above preparation method has low production efficiency and the plastic product is not aesthetically pleasing. In particular, the method of splicing the parts into a whole by gluing is harmful to the human body and pollutes the environment, which is not conducive to environmental protection. Summary of the Invention

[0003] The main purpose of the present invention is to provide a mold for preparing plastic hollow products, aiming to improve the current problems of low production efficiency and poor overall aesthetics of hollow products.

[0004] To achieve the above objectives, the present invention provides a mold for preparing a hollow plastic product, having a first axis extending along the X direction, comprising:

[0005] An outer mold body having a mold cavity formed therein; and

[0006] The inner mold body has a first assembled form and a second disassembled form; when the inner mold body is in the first form, a connected groove structure is formed on the circumferential surface of the inner mold body; the mold cavity is used to accommodate the inner mold body in the first form, so that the mold cavity and the groove structure enclose an injection cavity for preparing a hollow part, and the axial center lines of the inner mold body and the mold cavity coincide with the first axis;

[0007] The inner mold body is in the second form, which is used to move the inner mold body outward from the interior of the hollow part.

[0008] In one embodiment, the inner mold body includes a mold core subassembly, and the mold core subassembly is provided in plurality. The plurality of mold core subassemblies are sequentially assembled around the first axis so that the inner mold body assumes the first shape.

[0009] The outer peripheral surface of the mold core component is provided with sub-grooves, and the inner mold body is in the first shape, so that two adjacent sub-grooves are connected and the sub-grooves are spliced ​​together to form the groove structure.

[0010] In one embodiment, the core disassembly includes:

[0011] a main body, the sub-grooves being provided on an outer peripheral surface of the main body; and

[0012] a mounting portion connected to both ends of the main body along its length, and the mounting portion extending in a direction away from the main body;

[0013] The inner membrane body is in the first form, and the plurality of mounting portions on the same side are assembled to form an extension piece, so that avoidance holes are formed at both ends of the prepared hollow piece, so as to allow the membrane core component in the second form to be moved out of the hollow piece through the avoidance holes;

[0014] The outer mold body has two ends along the X direction respectively with jacks connected to the mold cavity, the inner diameter of the jacks matches the outer diameter of the extension piece, and the two ends along the X direction of the inner mold body are connected to the jacks through the extension piece.

[0015] In one embodiment, the inner mold body is in the first state, a cavity is formed on a side of the main body away from the sub-groove, and a through hole is formed in the extension member, one end of the through hole is connected to the cavity, and the other end is connected to the outside;

[0016] The inner mold body also includes:

[0017] A locking ring coaxially sleeved on the outer peripheral surface of the extension piece; and

[0018] A lock post, wherein the outer periphery of the lock post and the inner walls of the two through holes have the same taper, and the lock post is arranged in the cavity and the through hole to cooperate with the lock ring to tighten the main body parts and the mounting parts.

[0019] In one embodiment, the main body has a first surface facing away from the first axis and a second surface facing the first axis, and the second surfaces are sequentially assembled around the first axis to form the cavity;

[0020] The mounting portion has a third surface facing away from the first axis and a fourth surface facing the first axis, and the fourth surfaces are sequentially assembled around the first axis to form the through hole;

[0021] The first surface width of at least one of the mold core components is smaller than the second surface width, and the third surface width is smaller than the fourth surface width, so that inclined surfaces are formed between the first surface and the second surface, and between the third surface and the fourth surface.

[0022] In one embodiment, the insertion hole includes a first hole segment and a second hole segment that are connected to each other, and the first hole segment is connected to the cavity through the second hole segment;

[0023] The inner diameter of the second hole section matches the outer diameter of the locking ring, and the inner diameter of the first hole section matches the outer diameter of the extension piece.

[0024] In one embodiment, the outer diameter of the extension piece and the inner diameter of the locking ring gradually decrease in a direction away from the cavity, and the outer circumference of the extension piece and the inner circumference of the locking ring have the same taper.

[0025] In one embodiment, the outer mold body comprises:

[0026] A first mold body having a first cavity communicating with the outside; and

[0027] The second mold body has a second cavity communicated with the outside. The first mold body and the second mold body are assembled to form the outer mold body, and the first cavity and the second cavity are assembled to form the mold cavity.

[0028] In one embodiment, the mold for preparing a hollow plastic product further includes a blocking piece, wherein a relief cavity is formed in the blocking piece, and the relief cavity is used to accommodate part of the mold core disassembly;

[0029] The blocking member replaces the first mold body or the second mold body and is used to isolate a portion of the groove structure located in the avoidance cavity from a portion of the groove structure located in the first mold body or the second mold body.

[0030] In one embodiment, the blocking member and the first mold body or the second mold body are joined to form a joint surface, and the blocking member includes a blocking block, and the inner side of the blocking block has an arc-shaped cavity;

[0031] There are multiple blocking blocks, and the multiple blocking blocks are spliced ​​around the first axis, so that the multiple arc-shaped cavities are spliced ​​together to form the avoidance cavity;

[0032] The blocking block has a protrusion extending toward the first axis at the position of the splicing surface, which is used to be inserted into the groove structure corresponding to the position of the splicing surface to isolate the part of the groove structure located in the avoidance cavity from the part of the groove structure located in the first mold body or the second mold body.

[0033] The mold for preparing a plastic hollow product of the present invention includes an outer mold body and an inner mold body, wherein the inner mold body has a first form of splicing and a second form of splitting. When the inner mold body is in the first form, a groove structure is formed on its circumferential surface, and the groove structure is spliced ​​with the mold cavity in the outer mold body to form an injection cavity for preparing the hollow part; when the injection molding of the hollow part is completed, it is only necessary to split the inner mold body in the first form and split it into the second form, thereby allowing the inner mold body in the split state to be moved outward from the inside of the prepared hollow part, which significantly improves production efficiency compared to the traditional process flow that requires the hollow part to be split into multiple parts and separately injection molded; at the same time, the preparation mold in this scheme is adopted, so that the hollow part finally prepared remains as a whole, which makes the hollow part as a whole have better aesthetics compared to the traditional processing flow (which requires the use of auxiliary parts or gluing to assemble multiple parts). BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0035] Figure 1 This is a schematic diagram of the overall structure of the mold for preparing the plastic hollow product of the present invention;

[0036] Figure 2 This is a schematic diagram of the separation of the first mold body and the second mold body of the mold for preparing the plastic hollow product of the present invention;

[0037] Figure 3 A schematic diagram of the inner mold structure of a mold for preparing a hollow plastic product of the present invention;

[0038] Figure 4 This is a schematic diagram of the separation of the locking cylinder and the locking ring of the mold for preparing the plastic hollow product of the present invention;

[0039] Figure 5 This is a schematic diagram of the exploded structure of the mold body in the mold for preparing the plastic hollow product of the present invention;

[0040] Figure 6 This is a schematic diagram of the separation of the mold cores of the mold for preparing the plastic hollow product of the present invention;

[0041] Figure 7 A schematic diagram of the disassembly structure of the mold core for preparing the plastic hollow product of the present invention;

[0042] Figure 8 Preparation of mold for the plastic hollow product of the present invention Figure 7Front view of the disassembled middle mold core;

[0043] Figure 9 Preparation of mold for the plastic hollow product of the present invention Figure 1 Schematic diagram of the cross-section of the structure;

[0044] Figure 10 Preparation of mold for the plastic hollow product of the present invention Figure 9 A schematic diagram of the structure at center A;

[0045] Figure 11 Preparation of mold for the plastic hollow product of the present invention Figure 9 Another perspective structural diagram;

[0046] Figure 12 A schematic cross-sectional view of the second mold body of a mold for preparing a hollow plastic product of the present invention;

[0047] Figure 13 Preparation of mold for the plastic hollow product of the present invention Figure 12 Center view structural diagram;

[0048] Figure 14 Schematic diagram of replacing the first / second mold body with a mold plugging piece for preparing a hollow plastic product of the present invention;

[0049] Figure 15 A schematic diagram of the installation relationship between the mold sealing block and the mounting frame for preparing the plastic hollow product of the present invention;

[0050] Figure 16 A schematic diagram of the structure of a mold sealing block for preparing a hollow plastic product of the present invention;

[0051] Figure 17 A schematic diagram of the structure of a mold mounting frame for preparing a hollow plastic product of the present invention;

[0052] Figure 18 A schematic diagram of the process of removing the core of a mold from a hollow part in preparing a plastic hollow product of the present invention;

[0053] Figure 19 This is a schematic diagram of the structure of the hollow parts of the mold for preparing the plastic hollow product of the present invention.

[0054] Description of Figure Numbers:

[0055] 1. Outer mold body; 11. First mold body; 111. First cavity; 12. Second mold body; 121. Second cavity; 14. Insertion hole; 141. First hole section; 142. Second hole section; 15. Accommodation hole;

[0056] 2. Inner mold body; 21. Groove structure; 211. Sub-groove; 22. Mold core disassembly; 221. Main body; 2211. First surface; 2212. Second surface; 222. Mounting portion; 2221. Third surface; 2222. Fourth surface; 23. Cavity; 24. Locking ring; 25. Locking post;

[0057] 3. Extension piece; 31. Through hole;

[0058] 4. Sealing member; 41. Sealing block; 411. Arc-shaped cavity; 412. Raised portion; 42. Joint surface;

[0059] 5. Mounting frame; 51. Slide chute;

[0060] 6. Hollow parts; 61. Avoidance holes.

[0061] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0062] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0063] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0064] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0065] Currently, when preparing some plastic products with a hollow interior and a hollow surface on the market, the plastic product is usually split into several parts, and the split parts are injection molded separately. After the injection molding is completed, the parts are bonded together with glue or assembled with auxiliary parts to splice the scattered parts into a whole, thereby preparing a plastic product with a cavity inside and a hollow surface. The above preparation method has low production efficiency and the plastic product is not aesthetically pleasing. In particular, the method of splicing the parts into a whole by gluing is harmful to the human body and pollutes the environment, which is not conducive to environmental protection.

[0066] Based on this, refer to Figures 1-6 As shown, the embodiment of the present application provides a mold for preparing a plastic hollow product, having a first axis extending along the X direction, including an outer mold body 1 and an inner mold body 2; wherein a mold cavity is formed in the outer mold body 1, and it can be understood that the outer mold body 1 is provided with an injection hole (not shown in the figure) connected to the outside and the mold cavity; the inner mold body 2 has a first form of splicing and a second form of splitting. When the inner mold body 2 is in the first form, a connected groove structure 21 is formed on the outer peripheral side surface of the inner mold body 2. When preparing the hollow part 6, the inner mold body 2 is adjusted to the first form and placed in the mold cavity, so that the mold cavity and the groove structure 21 enclose an injection cavity for preparing the hollow part 6, and injection molding is carried out into the above-mentioned injection cavity through the injection hole provided on the outer mold body 1, thereby completing the preparation of the hollow part 6; it can be understood that, as Figure 9 As shown, the axial center line of the inner mold body 2 and the axial center line of the mold cavity should both coincide with the first axis, so that the inner mold body 2 and the mold cavity can match and fit together, and the groove structure 21 formed on the outer peripheral side surface of the inner mold body 2 and the mold cavity can be enclosed to form an injection cavity for preparing the hollow part 6.

[0067] In this embodiment, when preparing the hollow part 6, the plastic fluid (such as some thermoplastic material) used to prepare the hollow part 6 is poured into the groove structure 21 through the injection hole provided on the outer mold body 1. Since the groove structures 21 on the surface of the inner mold body 2 are interconnected, when the plastic fluid enters the groove structure 21 through the injection hole, it will flow along the groove structure 21 to other parts of the injection cavity until the injection cavity is completely filled, thereby completing the preparation of the hollow part 6; Figure 19 As shown, it can be understood that when the plastic fluid solidifies, the plastic formed in the groove structure 21 constitutes the hollow part 6, and the area outside the groove structure 21 forms the hollow portion of the hollow part 6.

[0068] It can be understood that when the inner mold body 2 in the first form is placed in the mold cavity, the inner wall of the mold cavity and the area of ​​the outer peripheral surface of the inner mold body 2 where the groove structure 21 is not provided are in close contact, thereby forming the above-mentioned injection cavity by enclosing the mold cavity and the groove structure 21; or the inner wall of the mold cavity is provided with a groove corresponding to the groove structure 21 at a position corresponding to the groove structure 21 (such as Figure 12 、 Figure 13 As shown), when the inner mold body 2 in the first form is placed in the mold cavity, the groove structure 21 formed on the outer peripheral surface of the inner mold body 2 and the groove formed on the inner wall of the mold cavity correspond to each other and are connected (assembled to form an injection cavity), and the inner wall of the mold cavity and the outer peripheral surface of the inner mold body 2 where the groove structure 21 is not provided are also in close contact; whether a groove needs to be provided on the inner wall of the mold cavity can be adjusted accordingly according to the customer's customization requirements for the product.

[0069] In this embodiment, when the injection molding of the hollow part 6 is completed and the inner mold body 2 needs to be removed from the hollow part 6, the inner mold body 2 needs to be taken out from the mold cavity. At this time, the inner mold body 2 is inside the prepared hollow part 6. In order to remove the inner mold body 2 inside the hollow part 6 from the hollow part 6, the inner mold body 2 is adjusted from the first assembled form to the second split form, such as Figure 18 As shown, the inner mold body 2 is moved outward from the interior of the hollow part 6.

[0070] In this embodiment, by providing an inner mold body with a first form and an inner mold body with a second form, it is achieved that when preparing the hollow part 6, the inner mold body 2 is in the first form; when it is necessary to remove the inner mold body 2 from the hollow part 6, the inner mold body 2 is adjusted to the second form; and in the traditional preparation method, since the inner mold core is a complete structure, in order to be able to remove the inner mold core from the hollow part 6 after completing the preparation of the hollow part 6, the hollow part 6 needs to be split into multiple parts, separated, and injection molded separately, and then the separated and separately prepared parts are assembled, thereby realizing the preparation process of the hollow part 6; during assembly The parts need to be connected by auxiliary parts or glued together by glue. The above preparation process results in low product preparation efficiency, and the hollow part 6 finally formed is either connected by auxiliary parts or glued together, resulting in poor overall aesthetics. In the present application, by adjusting the shape of the inner mold body 2, flexible operation can be achieved during injection and removal, and the hollow part 6 finally prepared is an integral structure, avoiding the traditional need to assemble the parts, which leads to a waste of human resources and low production efficiency, and also makes the hollow part 6 have a higher aesthetics.

[0071] Reference Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 As shown, in one embodiment of the present application, the inner mold body 2 includes a core split 22, and the core split 22 is provided with at least two or three, four, etc. (the specific number of the core split 22 can be adjusted accordingly according to the prepared hollow part 6), and the multiple core splits 22 are sequentially assembled around the first axis to make the inner mold body 2 present a first shape (such as Figure 2 、 Figure 3 as shown); Figure 6 、 Figure 8 As shown, a sub-groove 211 is provided on the outer peripheral side surface of each core component 22. When the inner mold body 2 is in the first form, the sub-grooves 211 on the outer peripheral side surfaces of two adjacent core components 22 can be connected to each other, thereby making the sub-grooves 211 on the outer peripheral side surfaces of each core component 22 assembled into the above-mentioned groove structure 21. Since the two adjacent sub-grooves 211 are connected to each other, the groove structure 21 finally assembled is also in a connected state; therefore, when injection molding is performed into the injection cavity enclosed by the mold cavity and the groove structure 21, the plastic fluid can flow in the injection cavity until the injection cavity is completely filled, thereby completing the injection molding preparation process of the hollow part 6.

[0072] Reference Figure 4 、 Figure 5 、 Figure 12 、 Figure 13 As shown, in one embodiment of the present application, the core disassembly part 22 includes a main body part 221 and a mounting part 222; wherein the sub-groove 211 is provided on the outer peripheral side surface of the main body part 221, the mounting part 222 is connected to both ends of the main body part 221 along the X direction, and the mounting part 222 extends in a direction away from the main body part 221. When the inner mold body 2 is in the first form, the main bodies 221 are sequentially assembled around the first axis, and multiple mounting parts 222 located on the same side are assembled to form an extension part 3 (such as Figure 4 shown).

[0073] It can be understood that, since the sub-grooves 211 are only formed on the outer peripheral surface of the main body 221, the groove structure 21 is also only formed on the outer peripheral surface of the structure formed by the combination of multiple main body parts 221 (there is no groove structure 21 on the outer peripheral side of the extension 3), so that the hollow part 6 finally prepared is formed in the area corresponding to the outer peripheral side of the multiple main body parts 221. Since the extension 3 extends in a direction away from the main body 221, that is, the extension 3 extends outward from the two ends of the hollow part 6 along the X direction, a avoidance hole 61 is formed at the two ends of the hollow part 6 along the X direction (such as Figure 19When the preparation of the hollow part 6 is completed and the inner mold body 2 needs to be removed from the hollow part 6, the inner mold body 2 is adjusted to the second split state, so that the main body 221 and the mounting portion 222 are in a separated state, and then the mold core disassembly 22 composed of the main body 221 and the mounting portion 222 is sequentially moved outward from the avoidance holes 61 at both ends of the hollow part 6 (as shown in FIG. Figure 18 ).

[0074] In this embodiment, Figure 9 、 Figure 10 、 Figure 12 、 Figure 13 As shown, at both ends of the outer mold body 1 along the X direction, there are respectively provided with sockets 14 connected to the mold cavity, and the inner diameter of the socket 14 is matched with the inner diameter of the extension 3. When the inner mold body 2 in the first form is accommodated in the mold cavity, the extension 3 can be inserted into the corresponding socket 14, so that the inner mold body 2 can be installed in the mold cavity (the inner diameter of the socket 14 matches the outer diameter of the extension 3. When the extension 3 is inserted into the socket 14, the inner mold body 2 can be fixed in the mold cavity).

[0075] Reference Figure 9 、 Figure 11 As shown, in one embodiment of the present application, the inner mold body 2 is in the first state, and a cavity 23 is formed on the side of the main body 221 facing the ion slot 211, as shown in FIG. Figure 4 As shown, a through hole 31 is formed in the extension part 3, one end of the through hole 31 is connected to the cavity 23, and the other end is connected to the outside world; the inner mold body 2 also includes a locking ring 24 and a locking column 25; wherein, the locking ring 24 is coaxially sleeved on the outer peripheral surface of the extension part 3, and the locking column 25 coaxially penetrates the cavity 23 and the through holes 31 located at both ends along the X direction, and the outer peripheral side of the locking column 25 and the inner wall of the two through holes 31 have the same taper, so that when the locking column 25 is sequentially penetrated through the through holes 31 at both ends and the cavity 23, the cooperation of the locking column 25 and the locking ring 24 can achieve the tightening of the core parts 22, so that the joints of the core parts 22 maintain close fit and contact to avoid gaps and leakage during subsequent injection molding.

[0076] In this embodiment, Figure 9As shown, the outer periphery of the lock post 25 and the inner wall of the through hole 31 formed in the extension pieces 3 at both ends have the same taper, that is, the outer periphery of the lock post 25 is in a conical shape (the two ends of the lock post 25 are respectively formed with a large diameter end and a small diameter end), and the through hole 31 located in the extension pieces 3 at both ends is also set as a tapered hole (because the two through holes 31 as a whole present the same taper as the lock post 25, the minimum inner diameter of one through hole 31 is greater than the maximum inner diameter of the other through hole 31); in specific implementation, the small diameter end of the lock post 25 is first inserted into the through hole 31 with a relatively large inner diameter, and then the lock post 25 is driven to move forward , and passes through the cavity 23 and the through hole 31 at the other end in turn until the lock column 25 can no longer move forward. At this time, the outer peripheral side surface of the lock column 25 and the inner walls of the two through holes 31 are in abutment, so that the core components 22 arranged around the first axis tend to move away from the first axis under the action of the lock column 25. However, at this time, the outer peripheral surface of the extension part 3 at both ends is sleeved with a locking ring 24. Therefore, under the cooperation of the locking ring 24 and the lock column 25, the core components 22 can be tightened to ensure that the adjacent core components 22 can fit closely together (so that the inner mold body 2 is in the first form).

[0077] In this embodiment, Figure 9 、 Figure 11 As shown, when the lock post 25 is in the predetermined position, both ends of the lock post 25 along the X direction should extend outward from the extension member 3 to facilitate subsequent removal and disassembly; Figure 12 、 Figure 13 As shown, the outer mold body 1 is provided with a receiving hole 15 connected to the insertion hole 14 and the outside. When the inner mold body 2 in the first form is accommodated in the mold cavity, the two ends of the locking column 25 along the X direction are respectively accommodated in the receiving hole 15.

[0078] In this embodiment, when the preparation of the hollow part 6 is completed and the inner mold body 2 needs to be removed from the inside of the hollow part 6, it is necessary to first remove the locking ring 24 from the extension part 3, and then move the locking column 25 that penetrates the cavity 23 and the through hole 31 outward. Since it is no longer constrained and supported by the locking ring 24 and the locking column 25, the inner mold body 2 is adjusted from the first form to the second form, which is used to move each mold core component 22 outward from the avoidance holes 61 at both ends of the hollow part 6 (such as Figure 18 Specifically, each core component 22 is moved toward the first axis and into the cavity 23, so that one end of the core component 22 along the X direction first extends outward from the avoidance hole 61 on the hollow part 6, and then the core component 22 is gradually moved outward completely through the avoidance hole 61.

[0079] In this embodiment, the size of the avoidance holes 61 formed at both ends of the hollow part 6 in this scheme should be sufficient to allow the core subassembly 22 to move outward from the avoidance holes 61. It can be understood that the more core subassembly 22 that make up the inner mold body 2, the easier it is for each core subassembly 22 to move outward from the avoidance hole 61. In terms of the specific quantity setting, in actual operation, the core subassembly 22 of a matching number can be configured according to the size of the prepared hollow part 6.

[0080] In this embodiment, since the locking ring 24 is sleeved on the outer peripheral side of the extension member 3 and is also supported by the locking column 25, the sleeve connection between the locking ring 24 and the extension member 3 is relatively firm. With the help of external tools, such as a wrench, the locking ring 24 can be struck hard to remove the locking ring 24 from the outer peripheral side of the extension member 3, and then the locking column 25 can be moved out from the cavity 23 and the through hole 31.

[0081] It can be understood that the shape of the lock column 25 in this solution and the shape of the through hole 31 formed in the extension part 3 can be any shape, such as cylindrical, square, etc., as long as the outer peripheral side of the lock column 25 and the inner walls of the two through holes 31 have the same taper, and when the lock column 25 passes through the through hole 31 and the cavity 23, it can cooperate with the locking ring 24 to tighten the core components 22; in this solution, there is no restriction on the shape of the lock column 25 and the through hole 31, as long as the above conditions are met.

[0082] Reference Figure 7 、 Figure 8 As shown, in one embodiment of the present application, the main body 221 has a first surface 2211 away from the first axis, and a second surface 2212 facing the first axis, and the second surfaces 2212 are sequentially assembled around the first axis to form a cavity 23;

[0083] The mounting portion 222 has a third surface 2221 away from the first axis and a fourth surface 2222 facing the first axis. The fourth surfaces 2222 are sequentially assembled around the first axis to form a through hole 31. Figure 6 As shown, among the multiple core sub-pieces 22, at least one core sub-piece 22 needs to be provided, and the width of the first surface 2211 of the core sub-piece 22 is smaller than the width of the second surface 2212, and the width of the third surface 2221 is smaller than the width of the fourth surface 2222; Figure 8 As shown in ( Figure 8 The dotted line in the figure is a vertical line direction), so that an inclined surface is formed between the first surface 2211 and the second surface 2212, and between the third surface 2221 and the fourth surface 2222. That is, the overall profile of at least one of the core components 22 is as follows: Figure 8 The shape shown in FIG (the width of the mold core stripping piece 22 away from the first axis is smaller, and the width of the side close to the first axis is larger, so that the mold core stripping piece 22 is Figure 8 In this embodiment, the core subassembly 22 is defined as a core subassembly 22a, and at least one core subassembly 22a is required. Figure 6 As shown, this solution is described by taking two core subassemblies 22a as an example, and the remaining core subassemblies 22 are all in a shape with a larger width at one end away from the first axis and a smaller width at one end close to the first axis.

[0084] In this embodiment, it is configured so that when the inner mold body 2 formed by the plurality of core sub-pieces 22 being sequentially assembled around the first axis is adjusted from the first form to the second form, it is necessary to first move the core sub-piece 22a toward the direction close to the first axis. Because the width of the core sub-piece 22a away from the first axis is small and the width of the side close to the first axis is large, the core sub-piece 22a can be driven to move toward the first axis and moved outward from the avoidance holes 61 at both ends of the hollow part 6, thereby forming a gap between the two core sub-pieces 22 originally located on both sides of the core sub-piece 22a, so that The remaining core components 22 can move toward the first axis in sequence with the help of the space margin provided by the gap, and finally move outward from the avoidance holes 61 at both ends of the hollow part 6 (if all the core components 22 are set to a shape with a large width at the end away from the first axis and a small width at the end close to the first axis, it will result in that no core component 22 can be driven to move toward the first axis); it can be understood that the more the above-mentioned core components 22a are set, the easier it will be to move the remaining core components 22 outward; it should be noted that the number of core components 22a in this solution is at least one.

[0085] Reference Figure 12 、 Figure 13 As shown, in one embodiment of the present application, the insertion hole 14 includes a first hole section 141 and a second hole section 142 that are connected to each other. The first hole section 141 is connected to the cavity 23 through the second hole section 142. The inner diameter of the first hole section 141 matches the outer diameter of the extension member 3, and the inner diameter of the second hole section 142 matches the outer diameter of the locking ring 24. As a result, when the inner mold body 2 (such as Figure 3 When the locking ring 24 is placed in the mold cavity, the locking ring 24 is just placed in the second hole section 142, and the portion of the extension 3 not covered by the locking ring 24 is placed in the first hole section 141 (as shown in FIG. Figure 9 、 Figure 10 As shown); since the outer diameter of the locking ring 24 matches the inner diameter of the second hole segment 142, and the outer diameter of the extension piece 3 matches the inner diameter of the first hole segment 141, when the inner mold body 2 is installed in the mold cavity, the outer periphery of the locking ring 24 is in close contact with the inner wall of the second hole segment 142, and the outer periphery of the extension piece 3 is in close contact with the inner wall of the first hole segment 141, which can ensure the stability of its installation.

[0086] Reference Figure 10 As shown, in one embodiment of the present application, in order to make it easier to remove the locking ring 24 from the outer periphery of the extension piece 3, in this embodiment, the outer diameter of the extension piece 3 and the inner diameter of the locking ring 24 gradually decrease in the direction away from the cavity 23, and the outer peripheral side of the extension piece 3 and the inner peripheral side of the locking ring 24 have the same taper; thus, it becomes easier to sleeve the locking ring 24 on the outer peripheral side of the extension piece 3, and when the locking ring 24 needs to be removed from the outer peripheral side of the extension piece 3, it is only necessary to use an external tool to apply an initial force to the locking ring 24 in the direction away from the main body 221, and to enable relative movement between the locking ring 24 and the extension piece 3, and then the locking ring 24 can be easily taken off and removed from the outer peripheral side of the extension piece 3.

[0087] In this embodiment, Figure 13 As shown, since the outer periphery of the extension piece 3 has a certain taper, the inner wall of the first hole section 141 needs to be set to a conical surface that matches the outer periphery of the extension piece 3, so that the part of the extension piece 3 that is not sleeved by the locking ring 24 can fit tightly with the inner wall of the first hole section 141.

[0088] Reference Figure 1 、 Figure 2 、 Figure 9 、 Figure 12 、 Figure 13 As shown, in one embodiment of the present application, the outer mold body 1 includes a first mold body 11 and a second mold body 12, and the first mold body 11 and the second mold body 12 are both provided with injection holes (not shown in the figure) for communicating with the injection cavity; wherein, the first mold body 11 has a first cavity 111 communicating with the outside world, and the second mold body 12 has a second cavity 121 communicating with the outside world, and the first mold body 11 and the second mold body 12 are spliced ​​together to form the above-mentioned outer mold body 1 (the first mold body 11 and the second mold body 12 can be kept in a spliced ​​state with the help of external auxiliary equipment, for example: one of the mold bodies is set to be fixed and the other mold body is movable. When splicing, the movable mold body is driven to move toward the fixed mold body to complete the splicing; or both mold bodies are set to be movable, and the two mold bodies are driven to move toward each other to complete the splicing), and the first cavity 111 and the second cavity 121 are spliced ​​together to form the above-mentioned mold cavity.

[0089] In this embodiment, after the injection molding of the hollow part 6 is completed, one of the mold bodies is first removed to separate the first mold body 11 and the second mold body 12 in the assembled state. At this time, the inner mold body 2 and the hollow part 6 are partially exposed, and then the inner mold body 2 needs to be removed from the other cavity. At this time, the inner mold body 2 can be removed from the other cavity with the help of external tools; for example, the accommodating holes 15 provided at both ends of the mold cavity can be set through along the X direction, so that the mold cavity is connected to the outside world through the jack 14 and the accommodating hole 15. When the inner mold body 2 is accommodated in the mold cavity, the lock column 25 is extended outward through the accommodating hole 15 at both ends along the X direction (as shown in FIG. Figure 9 As shown), or both ends of the lock column 25 along the X direction do not extend outward from the accommodating hole 15; when one mold body and the other mold body are separated, with the help of an external pushing tool (such as a retractable hydraulic rod, electric rod, etc.), one end of the lock column 25 along the X direction is pushed, thereby driving the inner mold body 2 to move out of the remaining cavity; it should be noted that when pushing with the help of the pushing tool, the pushing tool should push the end with the larger outer diameter of the lock column 25 to avoid the lock column 25 from withdrawing from the through hole 31 and the cavity 23 during the pushing process.

[0090] In this embodiment, the first mold body 11 , the second mold body 12 , the mold core component 2 , the locking ring 24 , and the locking post 25 are all metal structural parts.

[0091] Reference Figure 14 As shown, in one embodiment of the present application, the first mold body 11, the second mold body 12 and the inner mold body 2 are used to cooperate to prepare a single-color hollow piece 6. When preparing a two-color spliced ​​or multi-color spliced ​​hollow piece 6, the outer mold body 1 composed of the first mold body 11 and the second mold body 12 cannot be completed; Figure 14 As shown, this embodiment provides a specific structure for preparing a two-color spliced ​​hollow part 6. The mold for preparing a plastic hollow product also includes a blocking member 4, and an avoidance cavity is formed in the blocking member 4, wherein the blocking member 4 is used to replace the first mold body 11 (or the second mold body 12), and the avoidance cavity formed in the blocking member 4 is used to accommodate part of the inner mold body 2; at this time, the avoidance cavity and the cavity in the second mold body 12 are spliced ​​to form a mold cavity. When the blocking member 4 and the second mold body 12 are in the spliced ​​state, the blocking member 4 can move the part of the groove structure 21 located in the second mold body 12 The sealing member 4 is isolated and sealed from the partial groove structure 21 located in the avoidance cavity, so that during injection molding, injection molding can be carried out into the injection cavity through the injection hole provided on the second mold body 12. Since the sealing member 4 blocks the groove structure 21 formed on the other half of the circumferential surface of the inner mold body 2, the injection fluid entering the groove structure 21 corresponding to the second mold body 12 will not flow into the groove structure 21 in the avoidance cavity, thereby forming a partial hollow member 6 with a single color in the groove structure 21 corresponding to the second mold body 12.

[0092] In this embodiment, after the injection molding in the groove structure 21 corresponding to the second mold body 12 is completed, the sealing piece 4 can be removed, and the first mold body 11 can be reassembled with the second mold body 12. At this time, a hollow piece 6 with a single color has been formed in the groove structure 21 corresponding to the second mold body 12. Subsequently, plastic fluids of other colors can be injected into the groove structure 21 corresponding to the first mold body 11 through the injection hole on the first mold body 11. Since the groove structure 21 corresponding to the second mold body 12 is already filled with the hollow piece 6, the plastic fluid entering the groove structure 21 corresponding to the first mold body 11 will no longer move into the groove structure 21 corresponding to the second mold body 12. When the injection molding is completed, a hollow piece 6 with other colors will be formed in the groove structure 21 corresponding to the first mold body 11; after the inner mold body 2 is removed from the outer mold body 1, a hollow piece 6 with two-color splicing can be obtained.

[0093] It is understandable that when first completing the preparation of the hollow part 6 partial structure with a single color, you can wait for a while (plastics of different materials have different curing times, such as: polypropylene usually takes a few seconds to a few minutes; polycarbonate usually takes 30-60 seconds) to allow the hollow part 6 to cure before preparing the other half of the hollow part 6 partial structure with other colors.

[0094] Reference Figure 14 、 Figure 15 、 Figure 16 、 Figure 17 As shown, in one embodiment of the present application, the blocking member 4 is spliced ​​with the first mold body 11 or the second mold body 12 to form a splicing surface 42, and the blocking member 4 includes a blocking block 41, and the inner side of the blocking block 41 has an arc-shaped cavity 411; a plurality of blocking blocks 41 are provided, and the plurality of blocking blocks 41 are spliced ​​around the first axis so that the plurality of arc-shaped cavities 411 are spliced ​​to form an avoidance cavity (such as Figure 15 as shown); Figure 14As shown in the partially enlarged view in the middle, each blocking block 41 has a protrusion 412 extending toward the first axis at the joint surface 42. When the blocking piece 4 composed of multiple blocking blocks 41 is assembled with the first mold body 11 or the second mold body 12, the protrusion 412 is inserted into the groove structure 21 at the joint surface 42, thereby isolating and separating the groove structure 21 located in the avoidance cavity from the groove structure 21 located in the first mold body 11 or the second mold body 12. It can be understood that the protrusion 412 The specific shape of 12 and its arrangement position can be adjusted and set accordingly according to the shape of the hollow part 6 to be prepared. In short, when the sealing part 4 composed of multiple sealing blocks 41 is spliced ​​with the first mold body 11 or the second mold body 12, the raised parts 412 on the multiple sealing blocks 41 can be inserted into the groove structure 21 at the splicing surface 42, so as to isolate the groove structure 21 located in the avoidance cavity from the groove structure 21 located in the first mold body 11 or the second mold body 12.

[0095] In this embodiment, Figure 16 As shown, when multiple blocking blocks 41 are assembled to form a blocking piece 4, a hole groove for accommodating the locking ring 24, the extension piece 3 and the locking column 25 is formed on the side of the blocking piece 4 away from the first mold body 11 or the second mold body 12. The size and structure of the above-mentioned hole groove can be consistent with the first hole section 141, the second hole section 142 and the accommodating hole 15.

[0096] In this embodiment, when it is necessary to prepare a hollow part 6 with two or more colors, the first mold body 11 or the second mold body 12 can be split into multiple sub-molds, and matching blocking blocks 41 can be prepared. Then, the corresponding blocking blocks 41 are selected to replace the corresponding sub-molds, thereby isolating and sealing the groove structure 21 corresponding to the sub-mold from other groove structures 21 that need to be injected. Subsequently, the groove structure 21 corresponding to the sub-mold is separately injected with plastic fluids of other colors, thereby realizing the preparation of a hollow part 6 with two or more colors.

[0097] In this embodiment, a structure for installing the blocking block 41 is also provided. Figure 14 、 Figure 17 As shown, it includes a mounting frame 5, and each blocking block 41 is slidably assembled on the mounting frame 5, as shown in FIG. Figure 17As shown, a slide groove 51 is provided at the corresponding position on the mounting frame 5, and a slider (not numbered in the figure) is provided at the corresponding position on the blocking block 41, which can be slidably assembled in the slide groove 51. During operation, each blocking block 41 is moved along the corresponding slide groove 51 toward the first axis, so that multiple blocking blocks 41 are spliced ​​to form a blocking member 4, and the arc-shaped cavity 411 formed on the inner side of the blocking block 41 is spliced ​​to form an avoidance cavity for splicing with the first mold body 11 or the second mold body 12; it can be understood that a locking structure should be provided on the mounting frame 5 for locking and positioning multiple blocking blocks 41 in a spliced ​​state (the locking structure can have various forms, such as the cooperation of pins, pin holes or the cooperation of blocks, slots, etc.); when the blocking member 4 needs to be disassembled, first release the lock on the blocking block 41, and then move each blocking block 41 in the direction away from the first axis.

[0098] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A mold for preparing a hollow plastic product, having a first axis extending along the X direction, characterized in that: include: An outer mold body, wherein a mold cavity is formed in the outer mold body; as well as The inner mold body has a first form of assembly and a second form of disassembly; The inner mold body is in the first shape, so that a connected groove structure is formed on the peripheral surface of the inner mold body; the mold cavity is used to accommodate the inner mold body in the first shape, so that the mold cavity and the groove structure enclose an injection cavity for preparing a hollow part, and the axial center lines of the inner mold body and the mold cavity both coincide with the first axis; The inner mold body is in the second form, which is used to move the inner mold body outward from the interior of the hollow part.

2. The mold for preparing a plastic hollow product according to claim 1, wherein: The inner mold body includes a mold core subassembly, and the mold core subassembly is provided in plurality. The plurality of mold core subassemblies are sequentially assembled around the first axis so that the inner mold body is in the first shape; The outer peripheral surface of the mold core component is provided with sub-grooves, and the inner mold body is in the first shape, so that two adjacent sub-grooves are connected and the sub-grooves are spliced ​​together to form the groove structure.

3. The mold for preparing a plastic hollow product according to claim 2, wherein: The core disassembly includes: a main body, the sub-grooves being provided on an outer peripheral surface of the main body; and a mounting portion connected to both ends of the main body along its length, and the mounting portion extending in a direction away from the main body; The inner membrane body is in the first form, and the plurality of mounting portions on the same side are assembled to form an extension piece, so that avoidance holes are formed at both ends of the prepared hollow piece, so as to allow the membrane core component in the second form to be moved out of the hollow piece through the avoidance holes; The outer mold body has two ends along the X direction respectively with jacks connected to the mold cavity, the inner diameter of the jacks matches the outer diameter of the extension piece, and the two ends along the X direction of the inner mold body are connected to the jacks through the extension piece.

4. The mold for preparing a plastic hollow product according to claim 3, wherein: The inner mold body is in the first state, a cavity is formed on the side of the main body away from the sub-groove, and a through hole is formed in the extension piece, one end of the through hole is connected to the cavity, and the other end is connected to the outside; The inner mold body also includes: A locking ring coaxially sleeved on the outer peripheral surface of the extension piece; and A lock post, wherein the outer periphery of the lock post and the inner walls of the two through holes have the same taper, and the lock post is arranged in the cavity and the through hole to cooperate with the lock ring to tighten the main body parts and the mounting parts.

5. The mold for preparing a plastic hollow product according to claim 4, wherein: The main body has a first surface facing away from the first axis and a second surface facing the first axis, and the second surfaces are sequentially assembled around the first axis to form the cavity; The mounting portion has a third surface facing away from the first axis and a fourth surface facing the first axis, and the fourth surfaces are sequentially assembled around the first axis to form the through hole; The first surface width of at least one of the mold core components is smaller than the second surface width, and the third surface width is smaller than the fourth surface width, so that inclined surfaces are formed between the first surface and the second surface, and between the third surface and the fourth surface.

6. The mold for preparing a plastic hollow product according to claim 4, wherein: The insertion hole comprises a first hole segment and a second hole segment which are connected to each other, and the first hole segment is connected to the cavity through the second hole segment; The inner diameter of the second hole section matches the outer diameter of the locking ring, and the inner diameter of the first hole section matches the outer diameter of the extension piece.

7. The mold for preparing a plastic hollow product according to claim 4, wherein: The outer diameter of the extension piece and the inner diameter of the locking ring gradually decrease in a direction away from the cavity, and the outer peripheral side of the extension piece and the inner peripheral side of the locking ring have the same taper.

8. The mold for preparing a plastic hollow product according to any one of claims 1 to 7, wherein: The outer model body comprises: A first mold body having a first cavity communicating with the outside; and The second mold body has a second cavity communicated with the outside. The first mold body and the second mold body are assembled to form the outer mold body, and the first cavity and the second cavity are assembled to form the mold cavity.

9. The mold for preparing a plastic hollow product according to claim 8, wherein: The mold for preparing the plastic hollow product further includes a blocking piece, wherein a relief cavity is formed in the blocking piece, and the relief cavity is used to accommodate part of the mold core disassembly; The blocking member replaces the first mold body or the second mold body and is used to isolate a portion of the groove structure located in the avoidance cavity from a portion of the groove structure located in the first mold body or the second mold body.

10. The mold for preparing a plastic hollow product according to claim 9, wherein: The blocking member and the first mold body or the second mold body are joined to form a joint surface, and the blocking member includes a blocking block, and the inner side of the blocking block has an arc-shaped cavity; There are multiple blocking blocks, and the multiple blocking blocks are spliced ​​around the first axis, so that the multiple arc-shaped cavities are spliced ​​together to form the avoidance cavity; The blocking block has a protrusion extending toward the first axis at the position of the splicing surface, which is used to be inserted into the groove structure corresponding to the position of the splicing surface to isolate the part of the groove structure located in the avoidance cavity from the part of the groove structure located in the first mold body or the second mold body.

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