mold

Abstract

The application discloses a mold which comprises a mold plate, a core rod and an adjusting assembly. The mold plate is provided with a mold cavity, and the core rod is arranged in the mold cavity. The adjusting assembly comprises a movable sleeve and an adjusting sleeve which are movably arranged in the mold cavity. The movable sleeve is in abutting connection with the adjusting sleeve. The movable sleeve is provided with a first accommodating cavity, and the adjusting sleeve is provided with a second accommodating cavity. The core rod is sequentially arranged in the first accommodating cavity and the second accommodating cavity, so that the mold cavity, the core rod and the first accommodating cavity form a glue injection cavity, and a gas passage which is in communication with the glue injection cavity is formed at the abutting position of the movable sleeve and the adjusting sleeve. The adjusting sleeve drives the movable sleeve to move along the mold cavity, so as to adjust the size of the glue injection cavity. The application aims to realize the length adjustment of the glue injection cavity and avoid the problems of exhaust and glue overflow caused by glue injection.

Description

mold Technical Field

[0001] This invention relates to the field of molding die technology, and in particular to a die. Background Technology

[0002] In modern times, rubber hoses are mainly produced using extrusion or injection molding. Extruded hoses, because the vulcanization process takes place at atmospheric pressure, have relatively poorer electrical properties compared to hoses produced by injection molding. Injection molding, however, produces high-performance hoses. When producing hoses using injection molding, a fixed amount of rubber material is injected into the mold cavity via pressure injection or pre-formed semi-finished products. The mold is then closed, and the rubber material is vulcanized under pressure using an electrically heated flat vulcanizing machine. However, this production method is limited by mold structure, injection method, molding method, and rubber material characteristics. Often, the cavity size of a single mold is fixed, allowing only the production of rubber products of the same size. This cannot accommodate multiple size requirements, necessitating the fabrication, disassembly, and switching of multiple molds during production.

[0003] This method of producing hoses makes it impossible to produce hoses of multiple sizes using a single mold, which greatly affects the production efficiency and manufacturing cost of hoses. At the same time, there are also problems with air venting and overflow during the glue injection process. Summary of the Invention

[0004] The main objective of this invention is to provide a mold that allows for adjustable injection cavity length while avoiding venting and overflow issues during injection.

[0005] To achieve the above objectives, the present invention provides a mold, the mold comprising:

[0006] Template, wherein the template is provided with a mold cavity;

[0007] Mandrel, the mandrel being disposed in the mold cavity; and

[0008] An adjustment assembly includes a movable sleeve and an adjustment sleeve movably disposed within the mold cavity. The movable sleeve and the adjustment sleeve are in abutting connection. The movable sleeve has a first receiving cavity, and the adjustment sleeve has a second receiving cavity. The mandrel is sequentially inserted into the first receiving cavity and the second receiving cavity, so that the mold cavity, the mandrel, and the first receiving cavity surround and form an injection cavity. An air passage communicating with the injection cavity is formed at the abutting point of the movable sleeve and the adjustment sleeve.

[0009] The adjusting sleeve drives the movable sleeve to move along the mold cavity to adjust the size of the injection cavity.

[0010] In one embodiment, the movable sleeve includes a cylindrical portion and a connecting platform disposed at one end of the cylindrical portion. The cylindrical portion forms a first receiving cavity, and the connecting platform is provided with a communicating hole communicating with the first receiving cavity. The mandrel passes through the first receiving cavity and the communicating hole in sequence and extends into the second receiving cavity. The mandrel abuts against the wall of the communicating hole and the cavity wall of the second receiving cavity. One end of the adjusting sleeve abuts against the connecting platform and forms the air passage.

[0011] In one embodiment, the adjusting sleeve has a slot at one end near the movable sleeve, and the connecting platform has a locking platform. The slot and the locking platform engage to allow the first receiving cavity to communicate with the second receiving cavity through the communicating hole, and the contact point between the slot and the locking platform forms the air passage.

[0012] In one embodiment, the adjusting sleeve includes an adjusting part and a locking block. One end of the adjusting part is provided with a boss, and the locking block is provided with a recess. The boss is engaged in the recess so that the adjusting part and the locking block are connected and cooperate to form the second receiving cavity. The boss and the recess cooperate to form a groove.

[0013] In one embodiment, the protrusion is a first wedge-shaped structure, and the locking platform is a second wedge-shaped structure. The first wedge-shaped structure and the second wedge-shaped structure cooperate to abut and engage with the recess.

[0014] In one embodiment, the engaging block is further provided with a through hole communicating with the second receiving cavity;

[0015] And / or, the cross-section of the locking block is semi-circular, both ends of the locking block are provided with the recess, the adjustment part is provided with the protrusion corresponding to each of the recesses, and the connecting platform is provided with the locking platform corresponding to each of the recesses.

[0016] In one embodiment, the adjusting assembly further includes a fixed sleeve disposed within the mold cavity, with one end of the adjusting sleeve away from the movable sleeve passing through the fixed sleeve and screwed to it.

[0017] In one embodiment, the outer wall of the fixing sleeve is provided with a first protrusion, the first protrusion is disposed around the outer wall of the fixing sleeve, the template is provided with a first recess, and the first protrusion is limited to the first recess;

[0018] And / or, the adjusting sleeve is provided with a connected threaded section and a limiting platform, the limiting platform is arranged around the adjusting part, and the inner wall of the fixed sleeve is provided with a thread that mates with the threaded section, the threaded section passing through the fixed sleeve.

[0019] In one embodiment, the mold further includes a sleeve, which is sleeved on the end of the mandrel away from the adjusting sleeve, and the sleeve is fixed in the mold cavity and abuts against the template, so that the sleeve, the mold cavity, the mandrel and the first receiving cavity surround and form the injection cavity.

[0020] In one embodiment, the outer wall of the sleeve is provided with a third protrusion, the third protrusion is arranged around the outer wall of the sleeve, and the template is provided with a corresponding third recess, the third protrusion being limited to the third recess;

[0021] And / or, the end of the mandrel away from the adjusting sleeve is provided with a second protrusion, and the second protrusion is arranged around the mandrel, and the template is provided with a corresponding second recess, and the second protrusion is limited to the second recess;

[0022] And / or, the template includes an upper mold and a lower mold, the upper mold and the lower mold cooperating to form the mold cavity.

[0023] The mold of this invention features a mandrel and an adjusting assembly within a mold cavity. The adjusting assembly consists of a movable sleeve and an adjusting sleeve movably positioned within the mold cavity, with the movable sleeve and adjusting sleeve abutting against each other. The movable sleeve has a first receiving cavity through which the mandrel moves, and the adjusting sleeve has a second receiving cavity through which the mandrel moves. The mandrel passes sequentially through the first and second receiving cavities, forming a glue injection cavity by the mold cavity, the mandrel, and the first receiving cavity. An air passage connecting the glue injection cavity is formed at the abutment point of the movable sleeve and the adjusting sleeve. By moving the adjusting sleeve, the movable sleeve, connected to it, moves along the mold cavity, thereby adjusting the size of the glue injection cavity to produce hoses of different sizes. Simultaneously, the abutment connection between the movable sleeve and the adjusting sleeve provides an air passage, facilitating glue injection and venting while preventing glue overflow during injection. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 is an exploded structural diagram of a mold according to an embodiment of the present invention;

[0026] Figure 2 is a schematic cross-sectional view of the mold in one embodiment of the present invention;

[0027] Figure 3 is a schematic diagram of the mold structure without the upper mold in one embodiment of the present invention;

[0028] Figure 4 is an exploded view of the regulating component in one embodiment of the present invention.

[0029] Explanation of icon numbers:

[0030]

[0031]

[0032] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0037] In modern times, rubber hoses are mainly produced using injection molding. When producing rubber hoses using injection molding, a measured amount of rubber material is first injected under pressure or directly filled into the mold cavity using a pre-formed semi-finished product. Then the mold is closed, and the rubber material is pressurized and vulcanized using an electrically heated flat vulcanizing machine. However, this production method is limited by mold structure, injection method, molding method, and rubber material characteristics. Often, the cavity size of the same mold is fixed, allowing only the production of rubber products of the same size. This cannot meet the needs of multiple size settings, resulting in the need to manufacture multiple sets of molds and disassemble and switch between them during production.

[0038] This method of producing hoses makes it impossible to produce hoses of multiple sizes using a single mold, which greatly affects the production efficiency and manufacturing cost of hoses. At the same time, there are also problems with air venting and overflow during the glue injection process.

[0039] Based on the above-mentioned concepts and problems, the present invention proposes a mold 100. It is understood that the mold 100 allows for adjustment of the length of the injection cavity and also avoids the problems of venting and overflowing during injection.

[0040] Referring to Figures 1 to 4, this invention proposes a mold 100, which includes a template 1, a mandrel 2, and an adjustment assembly 3. The template 1 encloses a mold cavity 11. The adjustment assembly 3 includes a movable sleeve 4 and an adjustment sleeve 5 movably disposed within the mold cavity 11. The movable sleeve 4 and the adjustment sleeve 5 are in abutting connection. The movable sleeve 4 has a first receiving cavity 41, and the adjustment sleeve 5 has a second receiving cavity 51. The mandrel 2 is sequentially inserted into the first receiving cavity 41 and the second receiving cavity 51, so that the mold cavity 11, the mandrel 2, and the first receiving cavity 41 enclose a glue injection cavity 8. An air passage 9 communicating with the glue injection cavity 8 is formed at the abutting point of the movable sleeve 4 and the adjustment sleeve 5. The adjustment sleeve 5 drives the movable sleeve 4 to move along the mold cavity 11 to adjust the size of the glue injection cavity 8.

[0041] In this embodiment, as shown in Figures 1 to 3, the adjusting component 3 is located at one end of the mold cavity 11. In other embodiments, the adjusting component 3 may also be located at both ends of the mold cavity 11. Specifically, the adjusting component 3 is used to adjust the size of the injection cavity 8 so that a single mold 100 can produce pipe fittings of various sizes. At the same time, the movable sleeve 4 in the adjusting component 3 is abutted and connected to the adjusting sleeve 5, and an air passage 9 communicating with the injection cavity 8 is formed at the abutment point for venting during injection production to prevent gas in the injection cavity 8 from affecting the injection molding effect. The template 1 is provided with a mold groove, which encloses to form a mold cavity 11. After the mold 100 is injected with glue, the glue fills the entire injection cavity 8. The mandrel 2 located in the mold cavity 11 is covered by the glue, while the mandrel 2 located outside the mold cavity 11 remains in its original state, making it easy for the user to pick up and for demolding. The movable sleeve 4 is provided in the mold cavity 11 and has a first receiving cavity 41. The mandrel 2 passes through the first receiving cavity 41. The injection cavity 8 is left between the inner wall of the first receiving cavity 41 and the mandrel 2. The movable sleeve 4, as part of the mold 100, participates in the shaping of the end of the glue tube. The adjusting sleeve 5 has a second receiving cavity 51, and the mandrel 2 passes through the second receiving cavity 51. In this embodiment, the cavity wall of the second receiving cavity 51 near the mold cavity 11 can abut against the mandrel 2, further limiting the mandrel 2. A gap is left between most of the cavity wall of the second receiving cavity 51 and the mandrel 2, which facilitates the movement of the adjusting sleeve 5 for adjustment. The mold 100 realizes the length of the injection cavity 8 is adjustable by the cooperation of the adjusting sleeve 5 and the movable sleeve 4 in the adjusting assembly 3. One mold 100 can produce a variety of different sizes of glue tubes. At the same time, the abutting connection between the adjusting sleeve 5 and the movable sleeve 4 also avoids the venting and glue overflow problems that may occur when the mold cavity 11 is injected.

[0042] In actual implementation, the mold grooves of template 1 form a mold cavity 11 and a through-hole connecting the mold cavity 11. The through-hole can be located at one or both ends of the mold cavity 11, allowing the mandrel 2 to extend out of the mold cavity 11 from one or both ends, facilitating demolding and removal by the user. An adjusting sleeve 5 passes through the through-hole, allowing the user to grasp the adjusting sleeve 5 and extend it into or out of the through-hole, thereby driving the movable sleeve 4 connected to the adjusting sleeve 5 to move axially within the mold cavity 11, thus adjusting the length of the injection cavity 8. Adjusting components 3 can be installed at both ends of the mandrel 2, allowing the mold 100 to adjust the length of the injection cavity 8 and vent air during injection from both ends, making the mold 100 suitable for more application environments. Mold sleeves that participate in the shaping of the tube end can be installed at both ends of the mandrel 2 within the mold cavity 11, preventing the glue at the tube end from sticking to the template 1 during injection, facilitating demolding while ensuring the integrity of the glue tube.

[0043] In one embodiment, the movable sleeve 4 includes a cylindrical portion 42 and a connecting platform 43 disposed at one end of the cylindrical portion 42. The cylindrical portion 42 forms a first receiving cavity 41, and the connecting platform 43 is provided with a connecting hole 431 communicating with the first receiving cavity 41. The core rod 2 passes through the first receiving cavity 41 and the connecting hole 431 in sequence and extends into the second receiving cavity 51. The core rod 2 abuts against the wall of the connecting hole 431 and the cavity wall of the second receiving cavity 51. One end of the adjusting sleeve 5 abuts against the connecting platform 43, and the connection point forms an air passage 9.

[0044] In this embodiment, as shown in Figures 1 to 3, the movable sleeve 4 has a cylindrical portion 42 and a connecting platform 43. The cylindrical portion 42 forms a first receiving cavity 41 through which the mandrel 2 passes. The connecting platform 43 is used to abut against the connecting adjusting sleeve 5, and forms an air passage 9 at the abutment point for venting during glue injection in the glue injection cavity 8. The mandrel 2 abuts against the wall of the connecting hole 431 to prevent glue overflow during injection. The mandrel 2 also abuts against the wall of the second receiving cavity 51, which also helps to prevent glue overflow. Preventing glue overflow from the mold 100 during glue injection is beneficial to improving product production quality and efficiency, while avoiding the loss of raw materials and mold 100 caused by glue overflow, thus saving production costs.

[0045] In actual implementation, the inner diameter of the connecting hole 431 is smaller than the inner diameter of the cylindrical part 42. The connecting platform 43 needs to abut against the core rod 2, and there needs to be space between the cylindrical part 42 and the core rod 2 to form part of the injection cavity 8. The connecting platform 43 can be provided with a protruding structure, and one end of the adjusting sleeve 5 is provided with a corresponding groove. The protruding structure and the groove can be arranged laterally along the mold cavity 11 so that the connecting platform 43 and the adjusting sleeve 5 can be engaged or inserted.

[0046] In one embodiment, the adjusting sleeve 5 is provided with a groove 52 at one end near the movable sleeve 4, and the connecting platform 43 is provided with a platform 432. The groove 52 and the platform 432 are engaged to allow the first receiving cavity 41 to communicate with the second receiving cavity 51 through the connecting hole 431, and the contact point between the groove 52 and the platform 432 forms an air passage 9.

[0047] In this embodiment, as shown in Figures 1 to 4, the adjusting sleeve 5 is provided with a slot 52, and the connecting platform 43 of the movable sleeve 4 is provided with a locking platform 432. The slot 52 and the locking platform 432 can engage and cooperate, so that the adjusting sleeve 5 and the movable sleeve 4 are connected to each other, and the first receiving cavity 41 and the second receiving cavity 51 are also connected, so that the mandrel 2 can be sequentially inserted into the first receiving cavity 41 and the second receiving cavity 51. The contact point between the slot 52 and the locking platform 432 forms an air passage 9, which is used for venting during glue injection in the glue injection cavity 8.

[0048] In actual implementation, the groove 52 of the adjusting sleeve 5 and the locking platform 432 of the connecting platform 43 are engaged laterally along the mold cavity 11 so that the adjusting sleeve 5 can drive the movable sleeve 4 to move axially along the mold cavity 11. During the process of the adjusting sleeve 5 driving the movable sleeve 4 to move axially along the mold cavity 11, the adjusting sleeve 5 is always in contact with the movable sleeve 4.

[0049] In one embodiment, the adjusting sleeve 5 includes an adjusting part 53 and a locking block 54. One end of the adjusting part 53 is provided with a boss 531, and the locking block 54 is provided with a recess 541. The boss 531 is engaged in the recess 541 so that the adjusting part 53 and the locking block 54 are connected and cooperate to form a second receiving cavity 51. The boss 531 and the recess 541 cooperate to form a groove 52.

[0050] In this embodiment, as shown in Figures 1 to 4, the adjusting sleeve 5 includes an adjusting part 53 and a locking block 54. The adjusting part 53 is connected to the locking block 54 and forms a locking groove 52 that cooperates with the locking platform 432. The adjusting part 53 and the locking block 54 are respectively provided with a boss 531 and a recess 541. The adjusting part 53 and the locking block 54 are connected by the engagement of the boss 531 and the recess 541 to form a second receiving cavity 51 and a gap connecting the second receiving cavity 51. When the mold 100 is injected with glue, it can play a partial venting role.

[0051] In actual implementation, the adjusting part 53 and the locking block 54 can be connected by inserting a plug end and engaging a locking end, or by snapping a buckle. No specific limitation is made here.

[0052] In one embodiment, the boss 531 is a first wedge structure 534, and the locking platform 432 is a second wedge structure 433. The first wedge structure 534 and the second wedge structure 433 cooperate to abut and engage with the recess 541.

[0053] In this embodiment, as shown in Figures 1 to 4, a first wedge structure 534 and a second wedge structure 433 are provided at the contact point between the adjusting part 53 and the movable sleeve 4. A recess 541 is provided at the contact point between the locking block 54 and the first wedge structure 534 and the second wedge structure 433. The recess 541 can simultaneously limit the first wedge structure 534 and the second wedge structure 433, and cause the first wedge structure 534 and the second wedge structure 433 to abut and connect, thereby connecting the adjusting part 53 and the movable sleeve 4, and the locking block 54 and the first wedge structure 433... 534. The second wedge structure 433 forms part of the second receiving cavity 51. The core rod 2 of the cavity wall of the second receiving cavity 51 abuts against it to prevent overflow of glue during injection. The cavity wall of the second receiving cavity 51 has multiple interfaces to facilitate venting of the mold cavity 11 during injection. The arrangement of the first wedge structure 534, the second wedge structure 433 and the locking block 54 also makes the connection between the adjusting sleeve 5 and the movable sleeve 4 easy to install and disassemble. At the same time, the first wedge structure 534 of the adjusting sleeve 5 and the second wedge structure 433 of the movable sleeve 4 have simple structures and are easy to produce.

[0054] In actual implementation, the inclination of the first wedge structure 534 and the second wedge structure 433 is set according to the actual requirements of the tightness of the contact between the adjusting sleeve 5 and the movable sleeve 4, and no specific limitation is made here.

[0055] In one embodiment, the locking block 54 is further provided with a through hole 542 communicating with the second receiving cavity 51; and / or, the cross section of the locking block 54 is semi-circular, and both ends of the locking block 54 are provided with recesses 541, the adjusting part 53 is provided with a boss 531 corresponding to each recess 541, and the connecting platform 43 is provided with a locking platform 432 corresponding to each recess 541.

[0056] In this embodiment, as shown in Figures 1 to 4, the through hole 542 provided in the locking block 54 is used for venting the cavity, avoiding venting problems in the mold cavity 11 during the injection process of the mold 100, ensuring that the glue fills the injection cavity 8, and that the glue tube is fully formed, thus ensuring the structural integrity of the glue tube. The locking block 54 is semi-circular and connects with the movable sleeve 4 and the adjusting sleeve 5 to facilitate the casting of the mold 1. The locking block 54 abuts against the inner wall of the mold cavity 11 to prevent the locking block 54 from loosening during use and affecting the connection between the movable sleeve 4 and the adjusting sleeve 5. Both ends of the locking block 54 are provided with recesses 541 to make the abutment connection between the movable sleeve 4 and the adjusting sleeve 5 more secure.

[0057] In one embodiment, the adjusting assembly 3 further includes a fixed sleeve 6, which is disposed in the mold cavity 11. The end of the adjusting sleeve 5 away from the movable sleeve 4 passes through the fixed sleeve 6 and is screwed to the fixed sleeve 6.

[0058] In this embodiment, as shown in Figures 2 and 3, the fixed sleeve 6 is used to cooperate with the adjusting sleeve 5 to limit the adjustment range of the adjusting sleeve 5 and prevent the adjusting sleeve 5 from fully extending into or out of the mold cavity 11, thus losing its function of adjusting the length of the injection cavity 8. The fixed sleeve 6 is fixed in the mold cavity 11, allowing the adjusting sleeve 5 to move axially relative to the fixed sleeve 6. The adjusting sleeve 5 is screwed to the fixed sleeve 6. The adjusting sleeve 5 adjusts the length of the injection cavity 8 by screwing it into or out of the fixed sleeve 6. It can also determine the length of the adjusting sleeve 5 when screwed in or out, making it convenient for the user to adjust the length of the injection cavity 8 in a targeted manner. After the adjusting sleeve 5 has adjusted the length of the injection cavity 8, the fixed sleeve 6 can also limit the adjusting sleeve 5 to prevent axial movement of the adjusting sleeve 5 during the injection process of the mold 100, which would cause the actual size of the produced glue tube to be inconsistent with the expectation.

[0059] In actual implementation, the fixed sleeve 6 can be fixed in the mold cavity 11 by being snapped onto the template 1 with a detachable buckle, or a protrusion and a recess structure can be provided on the fixed sleeve 6 and the template 1 to limit the fixed sleeve 6 in the mold cavity 11. The inner wall of the fixed sleeve 6 can be provided with a friction structure corresponding to the adjusting sleeve 5, so that after the length of the injection cavity 8 of the adjusting sleeve 5 is adjusted, the adjusting sleeve 5 is limited to the fixed sleeve 6 by friction and cannot move axially. No specific limitation is made here.

[0060] In one embodiment, the outer wall of the fixed sleeve 6 is provided with a first protrusion 61, the first protrusion 61 is arranged around the outer wall of the fixed sleeve 6, the template 1 is provided with a first recess 111, and the first protrusion 61 is limited in the first recess 111; and / or, the adjusting sleeve 5 is provided with a threaded section 532 and a limiting platform 533 connected to each other, the limiting platform 533 is arranged around the adjusting part 53, and the inner wall of the fixed sleeve 6 is provided with a thread that mates with the threaded section 532, the threaded section 532 passes through the fixed sleeve 6.

[0061] In this embodiment, as shown in Figures 1 to 4, the fixed sleeve 6 is provided with a first protrusion 61 around the ring. After the template 1 is enclosed, a first recess 111 is provided at the position where it abuts against the first protrusion 61. The limiting cooperation between the first protrusion 61 and the first recess 111 enables the fixed sleeve 6 to be confined in the mold cavity 11, preventing the fixed sleeve 6 from moving during the injection process of the mold 100, which would cause the adjustment length of the injection cavity 8 to be inaccurate. The adjusting sleeve 5 and the fixed sleeve 6 are engaged by threads. When the adjusting sleeve 5 moves axially in the mold cavity 11, the movable sleeve 4 can be moved away from or closer to the opening by screwing the threaded section 532 of the adjusting sleeve 5 into or out of the fixed sleeve 6, so as to reduce or increase the length of the injection cavity 8. At the same time, after the length of the injection cavity 8 is adjusted, the threaded section 532 of the adjusting sleeve 5 stops rotating in the fixed sleeve 6. The thread of the threaded section 532 engages with the thread in the fixed sleeve 6 to limit the adjusting sleeve 5, so that the adjusting sleeve 5 cannot move in the axial direction. At the same time, the user can also judge the length of the adjusting sleeve 5 extending into or out of the mold cavity 11 by the number of threads screwed into or out of the threaded section 532, so as to accurately adjust the length of the injection cavity 8.

[0062] In actual implementation, the thread pitch of the threaded section 532 of the adjusting sleeve 5 can be set to the minimum precision required to adjust the length of the injection cavity 8. The scale of the adjusting length of the adjusting sleeve 5 can be directly printed on the threaded section 532, so that the user can directly confirm the real-time adjusting length of the injection cavity 8. A handle is provided at the end of the adjusting sleeve 5 away from the movable sleeve 4, so that the user can hold and rotate the adjusting sleeve 5. No specific limitation is made here.

[0063] In one embodiment, the mold 100 further includes a sleeve 7, which is sleeved on the end of the mandrel 2 away from the adjusting sleeve 5, and the sleeve 7 is fixed in the mold cavity 11 and abuts against the template 1, so that the sleeve 7, the mold cavity 11, the mandrel 2 and the first receiving cavity 41 surround and form the injection cavity 8.

[0064] In this embodiment, as shown in Figures 1 to 3, the sleeve 7 can limit the mandrel 2, keeping it confined within the mold cavity 11. Simultaneously, the sleeve 7 participates in the forming process of the tubing, shaping the end of the tubing. The sleeve 7 prevents the tubing end from sticking to the template 1 during injection, facilitating demolding while ensuring the integrity of the tubing. The mandrel 2, sleeve 7, movable sleeve 4, and the mold cavity 11 between sleeve 7 and movable sleeve 4 form the injection cavity 8. The adjustable part of the sleeve 5 is the length of the mold cavity 11 between sleeve 7 and movable sleeve 4, thus allowing the sleeve 5 to adjust the size of the injection cavity 8 to accommodate the production needs of tubing of different sizes.

[0065] In actual implementation, the sleeve 7 can be fixed in the mold cavity 11 by being snapped onto the template 1 with a detachable buckle, or protrusions and recesses can be provided on the sleeve 7 and the template 1 to limit the position of the sleeve 7 in the mold cavity 11. No specific limitation is made here.

[0066] In one embodiment, the outer wall of the sleeve 7 is provided with a third protrusion 71, which surrounds the outer wall of the sleeve 7. The template 1 is provided with a corresponding third recess 113, and the third protrusion 71 is limited to the third recess 113. Alternatively, the end of the mandrel 2 away from the adjusting sleeve 5 is provided with a second protrusion 21, which surrounds the mandrel 2. The template 1 is provided with a corresponding second recess 112, and the second protrusion 21 is limited to the second recess 112. Alternatively, the template 1 includes an upper mold 12 and a lower mold 13, which cooperate to form a mold cavity 11.

[0067] In this embodiment, as shown in Figures 1 and 2, the mandrel 2 is provided with a second protrusion 21, and the sleeve 7 is provided with a third protrusion 71. After the template 1 is enclosed, a second recess 112 is provided at the position that abuts against the second protrusion 21, and a third recess 113 is provided at the position that abuts against the third protrusion 71. The limiting cooperation between the second protrusion 21 and the second recess 112 allows the mandrel 2 to be confined in the mold cavity 11, and the limiting cooperation between the third protrusion 71 and the third recess 113 allows the sleeve 7 to be confined in the mold cavity 11. When the glue is injected into the mold cavity 11, the mandrel 2 and the sleeve 7 do not move, thus avoiding affecting the length of the injection cavity 8. This ensures that the length of the injection cavity 8 remains unchanged during the glue injection process, producing a glue tube that meets the size requirements.

[0068] In actual implementation, the second boss 21 and the cavity wall of the second recess 112 are in close contact, or a rubber ring is provided at the contact point between the second boss 21 and the second recess 112. The third boss 71 and the cavity wall of the third recess 113 are in close contact, or a rubber ring is provided at the contact point between the third boss 71 and the third recess 113. No specific limitation is made here. By increasing the friction between the second boss 21, the third boss 71 and the second recess 112, and the third recess 113, it is prevented that when the adjusting sleeve 5 moves axially to adjust the length of the injection cavity 8 or when the length of the injection cavity 8 is adjusted and injection is performed, the mandrel 2 or the sleeve 7 will move, affecting the adjusted length of the injection cavity 8 and the accuracy of the produced glue tube size.

[0069] In this embodiment, as shown in FIG2, the template 1 includes an upper mold 12 and a lower mold 13. The upper mold 12 and the lower mold 13 are provided with mold grooves and enclose each other to form a mold cavity 11. The upper mold 12 and the lower mold 13 are symmetrically arranged, and the mold grooves are combined to form the mold cavity 11. The openings can be provided at both ends of the mold cavity 11 so that the mandrel 2 can extend out of the mold cavity 11 from both ends, which is convenient for the user to take out and demold.

[0070] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A mold, characterized in that, The mold includes: a template having a mold cavity; a mandrel disposed in the mold cavity; and an adjusting assembly, the adjusting assembly including a movable sleeve and an adjusting sleeve movably disposed within the mold cavity, the movable sleeve and the adjusting sleeve being abutted together, the movable sleeve having a first receiving cavity, the adjusting sleeve having a second receiving cavity, the mandrel being sequentially inserted into the first receiving cavity and the second receiving cavity, so that the mold cavity, the mandrel, and the first receiving cavity enclose a glue injection cavity, and an air passage communicating with the glue injection cavity is formed at the abutment of the movable sleeve and the adjusting sleeve, the movable sleeve including a cylindrical portion and a connecting platform disposed at one end of the cylindrical portion, the cylindrical portion forming the first receiving cavity. The connecting platform has a connecting hole that connects to the first receiving cavity. The mandrel passes through the first receiving cavity and the connecting hole in sequence and extends into the second receiving cavity. The mandrel abuts against the wall of the connecting hole and the wall of the second receiving cavity. One end of the adjusting sleeve abuts against the connecting platform and forms the air passage. The end of the adjusting sleeve near the movable sleeve has a slot. The connecting platform has a locking platform. The slot and the locking platform engage to allow the first receiving cavity to communicate with the second receiving cavity through the connecting hole. The abutment of the slot and the locking platform forms the air passage. The adjusting sleeve drives the movable sleeve to move along the mold cavity to adjust the size of the injection cavity.

2. The mold as described in claim 1, characterized in that, The adjusting sleeve includes an adjusting part and a locking block. One end of the adjusting part is provided with a boss, and the locking block is provided with a recess. The boss is engaged in the recess so that the adjusting part and the locking block are connected and cooperate to form the second receiving cavity. The boss and the recess cooperate to form a slot.

3. The mold as described in claim 2, characterized in that, The protrusion is a first wedge-shaped structure, and the locking platform is a second wedge-shaped structure. The first wedge-shaped structure and the second wedge-shaped structure cooperate to abut and engage with the recess.

4. The mold as described in claim 3, characterized in that, The locking block is further provided with a through hole communicating with the second receiving cavity; and / or, the cross-section of the locking block is semi-circular, both ends of the locking block are provided with the recess, the adjustment part is provided with the boss corresponding to each of the recesses, and the connecting platform is provided with the locking platform corresponding to each of the recesses.

5. The mold as described in claim 4, characterized in that, The adjustment assembly also includes a fixed sleeve, which is disposed inside the mold cavity. One end of the adjustment sleeve away from the movable sleeve passes through the fixed sleeve and is screwed to the fixed sleeve.

6. The mold as described in claim 5, characterized in that, The outer wall of the fixed sleeve is provided with a first protrusion, which surrounds the outer wall of the fixed sleeve. The template is provided with a first recess, and the first protrusion is limited to the first recess. And / or, the adjusting sleeve is provided with a threaded section and a limiting platform connected to each other. The limiting platform surrounds the adjusting part. The inner wall of the fixed sleeve is provided with a thread that mates with the threaded section. The threaded section passes through the fixed sleeve.

7. The mold according to any one of claims 1 to 6, characterized in that, The mold further includes a sleeve, which is fitted onto the end of the mandrel away from the adjusting sleeve, and the sleeve is fixed inside the mold cavity and abuts against the template, so that the sleeve, the mold cavity, the mandrel and the first receiving cavity surround and form the injection cavity.

8. The mold as described in claim 7, characterized in that, The outer wall of the sleeve is provided with a third protrusion, the third protrusion is arranged around the outer wall of the sleeve, the template is provided with a corresponding third recess, and the third protrusion is limited to the third recess; and / or, the end of the mandrel away from the adjusting sleeve is provided with a second protrusion, and the second protrusion is arranged around the mandrel, the template is provided with a corresponding second recess, and the second protrusion is limited to the second recess; and / or, the template includes an upper mold and a lower mold, the upper mold and the lower mold cooperate to form the mold cavity.

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