Injection molding mold for shoes with patterns on the side of the sole

Abstract

The utility model relates to an injection molding mold for shoes with patterns on the side of the sole, comprising a last, a clamping mold assembly, an inner bottom mold and an outer bottom mold, wherein the outer bottom mold is composed of a bottom mold plate and a movable side mold, the number of movable side molds is multiple, and together with the bottom mold plate, the movable side mold can be an independent part that can be removed from the bottom mold plate, or can be movably connected to the bottom mold plate, the left clamping mold and the right clamping mold constituting the clamping mold assembly are arranged on the clamping mold opening and closing mechanism, and can be matched and separated under the drive of the clamping mold opening and closing mechanism, the bottom mold plate and the inner bottom mold are respectively rotatably connected to the outer sides of the left clamping mold and the right clamping mold, and a lever is provided at one end of the vertical shaft adjacent to the opening and closing mechanism. The utility model can be used to prepare shoes with patterns on the side of the sole, meeting the corresponding needs of consumers.

Description

Technical Field

[0001] The utility model relates to an injection molding mold for shoes, in particular to an injection molding mold for shoes with patterns on the side of the sole. Background Art

[0002] The existing shoe injection molding method is to inject thermoplastic materials such as PVC or TPR into the mold cavity (or mold cavity) of the injection molding mold of the injection molding machine. The molding mold usually includes a core and an outer mold, wherein the core can also be called a last mold or a last. The outer mold includes a clamping mold and a bottom mold. The clamping mold is used to cooperate with the last to realize the molding of the upper part, and usually includes two parts that can be opened and closed, which can be called a left clamping mold and a right clamping mold. The bottom mold is used to cooperate with the last to realize the molding of the sole, and is provided with a groove used as a sole cavity. According to the requirements of the injection molding process, the bottom mold can be one or more, which are used to sequentially mold each layer of the sole (if the sole is multi-layered). After the mold is closed, the clamping mold and the bottom mold surround the core, and the gaps between the clamping mold and the bottom mold and the core constitute the mold cavities for injection molding the upper and the sole respectively. For example, Chinese patent document CN104985755A discloses a shoe injection molding mold and a shoe injection molding method using the mold, wherein the mold includes a last mold, an outer mold, an injection nozzle and a corresponding clamping mold opening and closing mechanism, the outer mold includes a clamping mold and a first bottom mold that match each other, the bottom of the last mold is provided with an inwardly concave injection groove, the first bottom mold is provided with an injection nozzle through hole opposite to the injection groove, after the mold is closed, the injection nozzle passes through the injection nozzle hole, the inner end is located in the injection groove, and the outer end is located outside the outer mold, the method is to inject molten plastic material into the injection groove through the injection nozzle, so that the plastic material squeezes the sock from the inner side of the sock onto the inner surface of the outer mold until the plastic material fills the mold cavity. Chinese patent document CN116787834A discloses a method and device for preparing Niu Blanc rain boots, wherein the first last is moved into the mold cavity of the upper molding mold, and the rubber is injected to obtain the upper part of the Niu Blanc rain boots; the Niu Blanc sock is put on the second last; the first last is moved out of the mold cavity of the upper molding mold, and the upper part remains in the mold cavity; the second last is moved into the mold cavity of the upper molding mold, and the upper part is put on the second last; the upper part, the sole and the Niu Blanc sock are combined to obtain the finished shoe; wherein the thickness of the first last is greater than that of the second last. Chinese patent document CN114642296A discloses a safety shoe and a special manufacturing mold thereof. The shoe comprises a sole, an upper and a toe protection cap, wherein the toe protection cap is installed on the outside of the toe of the upper, a toe outer covering sheet is also provided on the outside of the toe protection cap, the toe outer covering sheet is integrally connected to the sole by injection molding, the lower end of the toe protection cap is injection molded and connected to the sole, and the toe outer covering sheet injection-moldes the outside of the toe protection cap onto the upper.Chinese patent document CN115302830A discloses a new injection process of a rubber sole injection machine, which uses rubber as the sole raw material, and uses high-temperature and high-pressure rubber fluid to form the sole by continuous upper injection. The mold includes a last, a left mold, a right mold and a bottom mold. The left mold is equipped with a left power source for mold closing, the right mold is equipped with a right power source for mold closing, and the bottom mold is equipped with a power source for lifting the bottom mold. One end of the last can be covered with the upper, and the other end is the sole pattern part, and it can be rotated and raised according to the process to be in different positions. Chinese patent document CN117341258A discloses an injection molding device, an injection molded shoe and a method for preparing an injection molded shoe using the injection molding device, wherein the injection mold includes a bottom mold, a side mold and a last, the side mold includes a left mold and a right mold located on both sides of the bottom mold, and the left mold has a left cavity and a first abutment portion, the right mold has a right cavity opposite to the left cavity and a second abutment portion opposite to the first abutment portion, when the first abutment portion abuts against the second abutment portion, the left cavity, the right cavity and the bottom mold jointly form a sole molding groove with an open upper end, the last is used to be sleeved in the shoe upper and at least partially fitted in the sole molding groove, the outer side surface of the last has an annular protrusion protruding outward, and the annular protrusion is opposite to the first abutment portion of the left mold and the second abutment portion of the right mold. These prior arts have their own characteristics and are adapted to their respective applicable occasions. However, these prior arts often use a cavity set on a bottom mold to form the sole. Based on the need for demoulding, the side walls of the cavity all use a cylindrical structure perpendicular to the bottom surface. Therefore, it is impossible to prepare a shoe with a pattern (non-cylindrical pattern, for example, horizontally extending stripes) on the side of the sole. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the utility model provides an injection molding mold for shoes with patterns on the side of the sole, so as to prepare shoes with patterns on the side of the sole to meet the corresponding needs of consumers.

[0004] The technical solution of the utility model is: an injection molding mold for shoes with patterns on the side of the sole, comprising:

[0005] The last (or last mold) is used as a mold core to define (shape) the inner surface of the shoe and has a shape that adapts to the inner cavity of the shoe;

[0006] The clamping mold assembly (also called the clamping mold) is used as an outer mold of the upper part, used to define (shape) the outer surface of the upper, and is provided with a clamping mold opening and closing mechanism for driving the opening and closing thereof;

[0007] The outsole mold is used as an external mold for the sole part, and is used to define (form) the outer surface of the sole. The outsole mold consists of a bottom mold plate and a movable side mold. The bottom mold plate is used to define (form) the bottom surface of the sole, and the movable side mold is divided into several sections (for example, usually divided into left and right sections), which are used to define (form) the side surfaces of the sole, and together with the bottom mold plate, form the cavity of the outsole mold.

[0008] Preferably, the movable side mold is an independent piece that can be removed from the bottom mold plate.

[0009] Preferably, a frame is provided around the bottom template, and the set position of the movable side mold on the bottom template (the position that together constitutes the outer bottom mold) is located within the frame on the bottom template.

[0010] Preferably, a side mold positioning structure that cooperates with each other is provided between the bottom mold plate and the movable side mold, and / or a side mold positioning structure that cooperates with each other is provided between the bottom surface of the clamping mold and the movable side mold.

[0011] Preferably, the side mold positioning structure that cooperates with each other may include two groups of permanent magnets that can attract each other. This positioning structure can be called a magnetic positioning structure. The two groups of permanent magnets are respectively arranged at the relative positions of two parts that need to be positioned (for example, the movable side mold and the bottom mold plate, or the movable side mold and the clamping mold assembly). The opposite magnetic poles of the corresponding permanent magnets on the two parts are opposite to each other so that they can be attracted to each other when the mold is closed (there may be no gap between the two, or there may be a gap).

[0012] The number of permanent magnets in each group of permanent magnets may be one or more.

[0013] Preferably, the cooperating side mold positioning structures may include a slot (concave structure) and a plug (convex structure, or protrusion) that can be plugged and fixed to each other. This positioning structure can be called a convex-concave positioning structure. The slot and the plug are respectively arranged at the relative positions of the two parts that need to be positioned (for example, the movable side mold and the bottom mold plate, or the movable side mold and the clamping mold assembly) so that they can be plugged and fixed together when the mold is closed.

[0014] Preferably, the movable side mold is movably connected to the bottom mold plate.

[0015] Preferably, the movable connection between the movable side mold and the bottom mold is an movable connection that allows the movable side mold to move linearly in a direction perpendicular to the side surface of the sole.

[0016] Furthermore, a linear guide structure (e.g., a guide structure in which a slide groove and a slider cooperate) is provided between the movable side mold and the bottom mold, and a side mold driving mechanism (e.g., a cylinder) is provided for driving the movable side mold to move linearly. Thus, the corresponding movable side mold can be driven by the side mold driving mechanism to reach a set position (so as to form an outer bottom mold with the bottom mold) or leave a set position (so as to implement demoulding).

[0017] A linear movement limiting structure (for example, a block in the slide groove for preventing the slider from continuing to move inward) can be set to limit the movable side mold from moving inward after reaching a set position.

[0018] Furthermore, an inner bottom mold is provided to realize multi-layer injection molding of the sole.

[0019] According to actual needs, an intermediate bottom mold may or may not be provided, and an intermediate bottom mold cavity is provided on the molding surface of the intermediate bottom mold for injection molding of the corresponding intermediate layer of the sole.

[0020] Furthermore, an insole mold cavity is provided on the molding surface of the insole mold (the surface mating with the clamping mold, or in other words, the surface used to form the mold cavity) for injection molding of the inner layer of the sole.

[0021] Preferably, the bottom mold plate and the inner bottom mold are rotatably connected to the outer sides of the left clamping mold and the right clamping mold respectively.

[0022] Furthermore, the maximum outward turning range of the bottom mold plate and the inner bottom mold can be limited to turning to a horizontal state through their respective limiting structures.

[0023] Typically, the clamping mold assembly may include a left clamping mold and a right clamping mold, and the left clamping mold and the right clamping mold are arranged on a clamping mold opening and closing mechanism (installed on the clamping mold opening and closing mechanism), and can be matched and separated under the drive of the clamping mold opening and closing mechanism. After the left and right clamps are matched, a complete clamping mold (the outer mold of the upper part) is formed. Depending on the actual situation, the clamping mold assembly may also adopt other forms, or include other parts.

[0024] Preferably, the mold clamping opening and closing mechanism includes a vertical shaft, and the left mold clamping and the right mold clamping are respectively provided with respective mold clamping connecting rods (or rocker arms), one end of the mold clamping connecting rod is rotationally connected to the vertical shaft (for example, through a bearing or a bushing), and the other end is fixedly connected to the left mold clamp or the right mold clamp (one connecting rod is connected to the left mold clamp, and the other connecting rod is connected to the right mold clamp), and the left and right mold clamps can be matched and separated by rotating the two mold clamping connecting rods on the vertical shaft.

[0025] The utility model can be used for injection molding of shoes with patterns. First, the shoe last, the clamping mold assembly and the inner bottom mold (and the intermediate bottom mold, if provided) are used to injection mold the upper and each layer of the sole except the outer layer of the sole to form a bottom-free intermediate body. After the bottom-free intermediate body is injection molded, the shoe last is kept in a posture with the bottom surface facing upward, the bottom-free intermediate body is wrapped on the shoe last, and the left clamping mold and the right clamping mold are matched on the outer side of the shoe last upper part (the left clamping mold and the right clamping mold are matched with each other, and the outer side of the shoe last upper part is surrounded by the bottom-free intermediate body. The outer sole mold is buckled on the bottom surface (sole side end surface) of the left and right clamping molds that match each other, wherein the movable side molds are connected end to end in sequence and clamped between the bottom surface of the bottom mold plate and the left and right clamping molds, thereby forming a sole outer layer mold cavity for injection molding the outer layer of the sole between the bottom-free intermediate body, the left and right clamping molds, the movable side mold and the bottom mold plate, injecting and filling the sole outer layer mold cavity with corresponding plastic material, demolding after curing, removing the bottom mold plate, the movable side mold and the left and right clamping molds, and taking off the molded shoe from the last.

[0026] The beneficial effects of the utility model are as follows: since the outer bottom mold adopts a multi-section movable side mold, each section of the movable side mold can be disassembled or removed laterally (parallel to the bottom surface direction) when demolding, so it is allowed to set various forms of convex and concave structures on the side mold, and form corresponding patterns on the side of the sole. These patterns can be extended vertically or horizontally, thereby increasing the beauty or diversity of the shoes; since a convex and concave positioning structure is set between the movable side mold and the bottom mold body, and the convex and concave positioning structure can be provided with mutually matching cones or inclined surfaces (non-conical inclined surfaces), when closing the mold, it can automatically realize the matching between the cones or inclined surfaces under the mold closing pressure. The movable side mold can be precisely positioned, which facilitates the operation (or simplifies the process) and ensures the positioning accuracy; since a magnetic positioning structure is provided between the movable side mold and the bottom surface of the clamping mold, not only can the movable side mold be positioned on the bottom surface of the clamping mold, but also the movable side mold can be fixed by magnetic attraction; since the magnetic positioning structure adopts a self-centering magnetic positioning structure, the accuracy of the position of the movable side mold is further guaranteed, which facilitates the operation; since a rotating opening and closing mechanism is provided, the operation is convenient and durable; since the outer bottom mold and the inner bottom mold are respectively hinged to the outer sides of the two clamping molds, the inner and outer bottom molds can be selected by flipping, which further facilitates the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the forming mold (the left and right clamps are in the state of being matched, viewed from above);

[0028] Figure 2 This is a schematic diagram of the structure of the molding die (left and right clamps separated, top view);

[0029] Figure 3 It is a schematic diagram of the structure of the forming mold (the inner bottom mold is in the mold closing state, cross section);

[0030] Figure 4 It is a schematic diagram of the structure of the molding die (outer bottom mold in mold closing state, cross section);

[0031] Figure 5 It is a schematic diagram of the positioning / centering process of the convex and concave structures used as a matching side mold positioning mechanism;

[0032] Figure 6 It is a schematic diagram of the positioning / centering process of the permanent magnet assembly used as a side mold positioning mechanism that matches each other. DETAILED DESCRIPTION

[0033] See also Figure 1-Figure 4This injection molding mold can form a pattern with a convex and concave structure on the side of the sole. Its last 10, clamping mold (or clamping mold assembly) 20 and other bottom molds (which can be called inner bottom molds or intermediate bottom molds) except the outer bottom mold can all adopt existing technologies, and all parts except the outer layer of the sole (which can be called the bottom-free intermediate 56) can be injection molded according to existing technologies. Usually, the last, clamping mold and inner bottom mold 30 can be used to integrally injection mold the upper (other parts of the shoe that are integrally injection molded with the sole) and the inner layer of the sole (which can be called the inner sole). For a sole with three layers (including) or more, a corresponding intermediate bottom mold can be further used to injection mold the corresponding sole intermediate layer (any layer between the inner layer and the outer layer in the sole can be called the midsole) on the intermediate molded in the previous sequence (previous step). The number of the sole intermediate layers depends on the specific design. For a sole with only an inner layer and an outer layer, the number of the intermediate layers can be regarded as zero. Before completing the entire injection molding process, the intermediate products (or semi-finished products) completed in each injection molding step can be called intermediates.

[0034] The last is used to define (form) the inner interface of the sole and the upper. The clamping mold corresponds to the upper part of the last and is used to define (form) the outer surface of the upper. According to the prior art, the clamping mold can be set as two parts that can be opened and closed, which can be respectively called the left clamping mold 21 and the right clamping mold 22. The left clamping mold and the right clamping mold are matched to form a complete clamping mold 20. The gap 51 between the clamping mold and the last (the side of the last) forms the upper after injection molding. According to actual needs, a sock (similar in shape to socks, used to form the lining or surface layer of the shoe, not shown) can be put on the last before injection molding, and the plastic material can be injected from the inside of the sock. After the injection molding is completed, the part of the sock corresponding to the upper is attached to the clamp (the inner surface of the clamp) to form the surface layer of the upper, so that the upper has the corresponding texture and visual effect; the plastic material is injected from the outside of the sock, and after the injection molding is completed, the part of the sock corresponding to the upper is attached to the last (the side of the last) to form the lining of the shoe; when two (two-layer) socks are provided, the plastic material is injected between the two socks, and after the injection molding is completed, the part of the outer sock corresponding to the upper is attached to the clamp to form the surface layer of the upper, and the part of the inner sock corresponding to the upper is attached to the last to form the lining of the shoe. The sock used to form the lining of the shoe can be called the inner sock, and the sock used to form the surface layer of the upper can be called the outer sock. The material of the sock can be selected according to actual needs to meet the design requirements of the upper surface and the shoe lining. The bottom of the sock (corresponding to the part of the sole) and other parts of the sock can be made of their own required materials and structures to meet the needs of each part.

[0035] The left clamp and the right clamp are respectively arranged on a clamp opening and closing mechanism (hereinafter referred to as the opening and closing mechanism), and the left clamp and the right clamp are matched and separated by the opening and closing mechanism. The opening and closing mechanism can adopt any suitable existing technology, and the left and right clamps can be opened and closed by swinging, or by linear movement. For example, two swing arms (clamp connecting rods) 24 that can swing on the same vertical shaft 25 can be provided, and the two swing arms extend horizontally, one end of which is rotatably connected to the vertical shaft (for example, connected to the vertical shaft through a bearing), and the other end is fixedly connected to the left clamp or the right clamp (see Figure 1 and Figure 2 For example, a cylinder can be set on each side of the last, and the outer end of the piston rod of the cylinder is fixedly connected to the clamping die on the corresponding side (left clamping die or right clamping die). The cylinder drives the clamping die on the corresponding side to move toward and away from each other, so as to achieve the connection and separation of the two clamping dies. The movement of the cylinder can be controlled by electronic control, which helps to achieve automation and intelligent control.

[0036] The inner bottom mold and the middle bottom mold (if any) can be based on the existing technology, and the groove 34 constituting the cavity 52 can be set on the molding surface. The molding surface is buckled on the bottom surface of the clamping mold (when the left and right clamping molds are in a matched state), and the plastic material injected into the groove can form the corresponding layer of the sole.

[0037] A locking rod 26 may be provided at one end of each of the left clamp and the right clamp, and a locking device may be provided on the locking rod to fix the two locking rods when the left and right clamps are in a matched state, such as a buckle (claw) 27 provided on one locking rod and capable of being clamped on the other locking rod.

[0038] The outer bottom mold (bottom mold for injection molding the outer layer of the sole) under the prior art can be divided into a bottom mold plate 42 and a plurality of movable side molds 41, so as to allow the movable side mold to move outward horizontally (in a direction perpendicular to the side of the sole) during demoulding, thereby allowing a convex-concave structure 45 for molding a pattern on the side of the sole to be set on the molding surface (inward side) of the movable side mold. The number and division method of the movable side molds can be based on the demoulding requirements, usually two (left side mold and right side mold respectively), and when necessary, four (left side mold, right side mold, front side mold and rear side mold respectively) or other numbers. Accordingly, the outer bottom mold for injection molding the outer layer of the sole is set to two parts, a bottom mold plate and a movable side mold. The movable side molds are connected end to end to form a complete side mold of the outer layer of the sole. The movable side molds are set at appropriate positions to enclose the cavity of the outer bottom mold together with the bottom mold plate.

[0039] The top and bottom surfaces of the movable side mold are both planes, which are respectively attached to the opposite surfaces of the bottom mold plate and the clamping mold (the left clamping mold and the right clamping mold that are opposite to each other) when the mold is closed. The surfaces (fitting areas) on the bottom mold plate and the left and right clamping molds that fit with the movable side mold are also planes, thereby achieving a sealed fit of the movable side mold on the corresponding surfaces.

[0040] The span range of each movable side mold can be set according to the shape and pattern of the side surface of the sole, or in other words, the division position between each movable side mold can be determined so that the movable side mold can be demoulded by moving horizontally outward.

[0041] The bottom mold plate is used to define (form) the bottom surface of the sole, and a convex-concave structure 44 for forming a sole pattern can be set on its forming surface. When the mold is closed, the convex-concave structure used as the sole pattern is located in the area surrounded by each movable side mold.

[0042] As a simple and convenient implementation, the movable side mold can be set as an independent piece that can be removed from the bottom mold plate, and the movable side mold can be taken and placed manually or by a robot. In this case, a frame 43 can be set around the bottom mold plate, and the set position of the movable side mold on the bottom mold plate (the position that together constitutes the outer bottom mold) is located within the frame on the bottom mold plate. Each movable side mold has a certain circumference after being connected end to end. Through the cooperation of the frame on the bottom mold plate and the movable side mold, each movable side mold can be basically limited to a desired appropriate position.

[0043] Side mold positioning structures corresponding to each movable side mold can be respectively arranged on the bottom mold plate and the bottom surface of the clamping mold, and a side mold positioning structure matching the side mold positioning structure on the bottom mold plate can be arranged on the bottom mold plate fitting surface of the movable side mold (the surface fitting with the bottom mold plate in the closed mold state). A side mold positioning structure matching the side mold positioning structure on the clamping mold (left clamping mold and right clamping mold) can be arranged on the clamping mold fitting surface of the movable side mold (the surface fitting with the bottom surface of the clamping mold in the closed mold state), so as to further improve the positioning accuracy and reliability.

[0044] The side mold positioning mechanism that matches each other can adopt a plug-in fixed convex-concave structure. For example, a slot 62 is provided on the corresponding fitting surface (the surface that fits with the movable side mold) of the bottom mold plate (or clamping mold), and a plug (protrusion) 61 that matches the slot is provided on the corresponding fitting surface of the movable side mold. The slot and the matching plug can be provided with inclined surfaces that can match each other (for example, the slot and the plug are provided with similar truncated cone shapes, the truncated cone on the slot is larger on the outside and smaller on the inside, and the truncated cone on the plug is larger on the bottom and smaller on the top, see Figure 5 For example, when the plug is inserted into the slot, if there is an error in the relative position of the slot and the plug, and they are not aligned (or not centered), they will be automatically centered under the action of the inclined surface, thereby achieving precise positioning. Reasonable size settings can ensure that the convex and concave structures are in a stable centered state in the mold closing state.

[0045] The matching side mold positioning mechanism can use mutually attracting permanent magnets. One or a group of permanent magnets are embedded in the corresponding fitting surface of the bottom mold plate (or the bottom of the clamping mold), and another or another group of permanent magnets are embedded in the corresponding fitting surface of the movable side mold. The opposite magnetic poles of the corresponding permanent magnets on the bottom mold plate (or the bottom of the clamping mold) and the movable side mold are opposite to each other, thereby realizing the magnetic attraction of the two.

[0046] As a preferred embodiment, the permanent magnet used as the side mold positioning mechanism can adopt a self-centering permanent magnet assembly, which includes a cylindrical (e.g., cylindrical) permanent magnet 65 and annular (e.g., annular) permanent magnet 66. The cylindrical permanent magnet is coaxially arranged (with axes overlapping) in the annular permanent magnet, and has a magnetic pole direction opposite to that of the annular permanent magnet (see Figure 6 For example, there is a gap between the cylindrical permanent magnet and the annular permanent magnet. The opposite poles of the cylindrical permanent magnets in the corresponding self-aligning permanent magnet assemblies located on the bottom mold (or clamping mold) and the movable side mold are opposite, and the opposite poles of the annular permanent magnets are opposite, thereby achieving magnetic attraction between the two. In addition, during the process of the bottom mold (or clamping mold bottom surface) and the movable side mold approaching each other or after contacting each other, if there is an error in the relative position between the corresponding self-aligning permanent magnet assemblies located on the bottom mold (or clamping mold) and the movable side mold, and there is no centering, they will be automatically centered under the synergistic effect of the attraction of the opposite poles and the repulsion of the same poles, thereby achieving precise positioning.

[0047] The movable side mold can be movably connected to the bottom mold plate by using a side mold connecting mechanism, and the movable side mold can be driven by the side mold connecting mechanism to perform mold closing and demoulding actions.

[0048] Based on the demoulding requirements of the side pattern of the sole, the demoulding action of the movable side mold can be horizontal or approximately horizontal. A connection mechanism that can drive the movable side mold horizontally away from the sole can be used as the side mold connection mechanism, for example, a horizontally arranged cylinder (which can be called a side mold cylinder). If necessary, a linear guide structure of the movable side mold (for example, a guide structure in which a slide groove and a slider cooperate) can also be provided to ensure the linear movement of the movable side mold.

[0049] A linear motion limiting structure (for example, a stopper in the slide groove for preventing the slider from continuing to move inward) may be provided to limit the movable side mold from continuing to move inward after reaching a set position.

[0050] The bottom template can be rotatably connected to the outside of the left clamp (or right clamp). For example, a longitudinal horizontal axis 28 can be fixedly connected to the outside of the left clamp (or right clamp) through a connecting plate, and the left side (or right side, which is the left side or right side of the bottom template in the mold-closing state) of the bottom template is rotatably connected (for example, through a bearing) to the corresponding horizontal axis through the bottom template connecting plate, one end of the bottom template connecting plate is fixedly connected to the bottom template, and the other end is rotatably connected to the corresponding horizontal axis. The maximum outward turning amplitude of the bottom template can be limited to turning to a horizontal state by means of a limiting structure or the like. When in use, the outer bottom mold can be buckled on the clamp (buckled on the movable side mold set on the bottom surface of the clamp) by flipping, and the bottom mold can also be flipped to the outside of the left clamp (or right clamp). In the mold-closing state, the left and right clamps are matched, and the outer bottom mold (bottom template and movable side mold) is buckled on the left and right clamps, thereby realizing mold closing, and after mold closing, the injection molding of the outer layer of the sole can be implemented.

[0051] A bottom template lever 46 extending longitudinally may be provided at one end of the bottom template, and the bottom template lever may be pushed (moved) by a mechanical arm or manually to make the arc motion required for flipping, thereby realizing flipping of the bottom template / outer bottom template.

[0052] In the case where the bottom mold plate is rotatably connected to the outside of the left clamping mold (or the right clamping mold), the inner bottom mold can be rotatably connected to the outside of the right clamping mold (or the left clamping mold). For example, a longitudinal horizontal axis 28 can be fixedly connected to the outside of the right clamping mold (or the left clamping mold) through a connecting plate, and the right side (or left side, which is the right side or left side of the inner bottom mold in the mold closing state) of the inner bottom mold is rotatably connected (for example, through a bearing) to the corresponding horizontal axis through the inner bottom mold connecting plate. One end of the inner bottom mold connecting plate is fixedly connected to the inner bottom mold, and the other end is rotatably connected to the corresponding horizontal axis. The maximum outward turning amplitude of the inner bottom mold can be limited to turning to a horizontal state by a limiting structure, thereby the inner bottom mold can be buckled on the clamping mold by flipping, or the inner bottom mold can be flipped to the outside of the right clamping mold (or the left clamping mold). In the mold closing state, the left and right clamping molds are matched, and the inner bottom mold is buckled on the left and right clamping molds, thereby realizing mold closing, and after mold closing, the injection molding of the upper and the inner layer of the sole can be implemented.

[0053] A longitudinally extending inner bottom mold lever 36 may be provided at one end of the inner bottom mold, and the inner bottom mold may be flipped by a mechanical arm or manually pushing (moving) the inner bottom mold lever to make an arc motion required for flipping.

[0054] The following method can be used to perform injection molding of shoes using any of the injection molding molds for shoes with patterns on the side of the sole disclosed in the utility model.

[0055] First, according to the existing technology, the upper and each layer of the sole except the outer layer of the sole are injection molded to form an intermediate body without a bottom layer. The intermediate body without a bottom layer is maintained on the last, and the left clamping mold and the right clamping mold are maintained to be matched on the outside of the upper part of the last (the left clamping mold and the right clamping mold are matched with each other and surrounded by the outside of the upper part of the last). The upper part of the intermediate body without a bottom layer is located between the last and the left and right clamping molds, so that the outer bottom mold is buckled on the bottom surface (sole side end surface) of the left and right clamping molds that are matched with each other, wherein each movable side mold is connected end to end in sequence and clamped between the bottom mold plate and the bottom surface 23 of the left and right clamping molds, thereby forming a sole outer layer mold cavity 53 for injection molding the outer layer of the sole between the intermediate body without a bottom layer, the left and right clamping molds, the movable side mold and the bottom mold plate, and the corresponding plastic material is injected into and fills the sole outer layer mold cavity, and demolded after curing, and the bottom mold plate, the movable side mold and the left and right clamping molds are removed, and the molded shoe is taken off the last.

[0056] Before injection molding, a sock can be set on the last. According to the position and function of the sock on the shoe, the sock can be divided into an inner sock (a sock used to form the inner lining of the shoe) and an outer sock (a sock used to form the surface of the upper). When the upper is injected (usually the upper and the inner layer of the sole are injected together), the inner sock is located on the inner side of the upper injection layer, and the outer sock is located on the outer side of the upper injection layer. According to the existing technology, a corresponding injection channel (and auxiliary structure, if necessary) can be set to allow the injected plastic material to flow into the outer side of the inner sock (when the sock is an inner sock) or the inner side of the outer sock (when the sock is an outer sock), or flow into the space between the inner sock and the outer sock. When the corresponding mold cavity is filled with plastic material, the inner sock will be attached to the last, and the outer sock will be attached to the inner wall of the outer mold (left and right clamping molds, inner bottom mold).

[0057] The upper and the inner layer of the sole can be integrated by injection molding with the last as the core and the inner bottom mold, the left clamping mold and the right clamping mold as the outer mold. Then, according to the actual situation (the number of injection molding layers of the sole), the injection molding of the middle layer of the sole (the layer between the inner layer and the outer layer) can be implemented or not.

[0058] Specifically, the injection molding method of the shoe may include the following steps:

[0059] S1. Put the socks on the last with the bottom of the last facing upwards. The socks can be an inner and outer sock (a sock used to form the inner lining of the shoe), or an outer sock (a sock used to form the surface of the upper), or include an inner sock and an outer sock, which is determined according to the design requirements of the shoe;

[0060] S2. From both sides of the last, buckle the left and right clamps on the outer side of the upper part of the last, leaving a gap 51 for injection molding the upper between the left and right clamps and the last, and the posture (orientation) of the left and right clamps is consistent with the posture (orientation) of the last, with the bottom surface 23 (sole side) facing upwards;

[0061] S3. Snap the inner bottom mold onto the left clamping mold and the right clamping mold to complete the first injection molding. The inner bottom mold, the left clamping mold and the right clamping mold form a closed outer mold, which surrounds the corresponding part of the last and forms a first mold cavity 52 for injection molding the upper and the inner layer of the sole between the inner bottom mold and the last;

[0062] S4. Implement injection molding of the first mold cavity, inject the corresponding molding material into and fill the first mold cavity, and form an integrally injection-molded upper injection layer and sole inner layer. When the sock is an inner sock, the upper injection layer is located on the outside of the inner sock; when the sock is an outer sock, the upper injection layer is located on the inside of the outer sock; when the sock includes an inner sock and an outer sock, the upper injection layer is located between the inner sock and the outer sock; according to actual needs, implement or not implement injection molding of the middle layer of the sole, when the middle layer of the sole is being molded, the cavity of the middle bottom mold is used to form an injection mold cavity 56;

[0063] S5. The bottom-free intermediate body injection-molded in the previous step is kept on the last, the left clamping mold and the right clamping mold are kept in a state of being mutually matched and surrounding the outer side of the upper part of the last, each movable side mold is placed at a suitable position on the bottom surface (end surface on the sole side) of the mutually matched left and right clamping molds, each movable side mold is sequentially connected end to end, the bottom mold plate is buckled on the movable side mold, so that each movable side mold is clamped between the bottom mold plate and the bottom surfaces of the left and right clamping molds; or, each movable side mold is placed at a suitable position on the bottom mold plate, together with the bottom mold plate, to form an outer bottom mold, and the outer bottom mold is buckled on the bottom surfaces of the mutually matched left and right clamping molds, thereby forming a mold cavity 53 for injection molding the outer layer of the sole between the bottom-free intermediate body, the left and right clamping molds, the movable side molds and the bottom mold plate;

[0064] S6. Inject the corresponding plastic material into the outer layer mold cavity of the sole and fill it. After solidification, the injection-molded shoe is formed. Remove the bottom mold plate, the movable side mold and the left and right clamping molds, and remove the injection-molded shoe from the last.

[0065] According to actual needs, the demoulded shoes can be sent to subsequent procedures for further processing or configuration to form finished shoes.

[0066] The mold closing and demoulding of the movable side mold and the clamping mold assembly can be implemented by corresponding manipulators or other mechanical equipment, and the mold closing and demoulding of the movable side mold and the clamping mold assembly can also be implemented by the mode of manual and mechanical cooperation or by manual mode. The injection of plastic material can be arranged according to the prior art, and different injection channels can be adopted for the injection molding of different plastic materials or different parts, and the same injection channel can also be adopted when appropriate. For example, when the inner layer of the sole and the upper of the shoe are injection molded, the injection channel can be arranged on the last and / or on the inner bottom mold, when the middle layer of the sole is injection molded, the injection channel can be arranged on the middle bottom mold and / or the last, when the outer layer of the sole is injection molded, the injection channel can be arranged on the movable side mold, and the injection channel that can dock with the injection channel 48 in the movable side mold is arranged on the bottom mold plate (for example, the frame of the bottom mold plate), so as to realize the connection of the external feed pipeline with the injection channel on the movable side mold through the injection channel on the bottom mold plate.

[0067] The inner opening of the injection channel (the opening on the mold cavity) can be set according to actual needs so that the injected plastic material flows into the corresponding mold cavity. For the same mold cavity, several inner openings can be set to facilitate the injected plastic material to fill the entire mold cavity.

[0068] According to the prior art, an exhaust port can be provided on the outer mold so that the air in the corresponding cavity can be discharged through the exhaust port.

[0069] Unless otherwise specified or one preferred or optional technical means is a further limitation of another technical means, all preferred and optional technical means disclosed in the present utility model can be arbitrarily combined to form several different technical solutions.

Claims

1. An injection molding mold for shoes with patterns on the side of the sole, comprising: The last, which is used as a mold core to define the inner surface of the shoe and has a shape that is adapted to the inner cavity of the shoe; The clamping mold assembly is used as an outer mold of the upper part of the shoe, used to define the outer surface of the upper, and is provided with a clamping mold opening and closing mechanism for driving the opening and closing thereof; The outsole mold is used as an outer mold of the sole to define the outer surface of the sole. Features: The outer sole mold is composed of a bottom mold plate and a movable side mold. The bottom mold plate is used to define the bottom surface of the sole. The movable side mold is divided into several sections and is used to define the side surfaces of the sole. Together with the bottom mold plate, it forms a cavity of the outer sole mold.

2. The injection molding mold for shoes with patterns on the side of the sole as claimed in claim 1, characterized in that The movable side mold is an independent part that can be removed from the bottom mold plate, and a mutually cooperating side mold positioning structure is provided between the bottom mold plate and the movable side mold, and / or a mutually cooperating side mold positioning structure is provided between the bottom surface of the clamping mold and the movable side mold.

3. The injection molding mold for shoes with patterns on the side of the sole as claimed in claim 2, characterized in that The side mold positioning structure that cooperates with each other includes two groups of permanent magnets that can attract each other. The two groups of permanent magnets are respectively arranged at the relative positions of two parts that need to be positioned, and the opposite magnetic poles of the corresponding permanent magnets on the two parts are opposite.

4. The injection molding mold for shoes with patterns on the side of the sole as claimed in claim 2, characterized in that The side mold positioning structures that cooperate with each other include a slot and a plug that can be plugged and fixed to each other, and the slot and the plug are respectively arranged at the relative positions of the two parts that need to be positioned.

5. The injection molding mold for shoes with patterns on the side of the sole as claimed in claim 1, characterized in that The movable side mold is movably connected to the bottom mold plate.

6. The injection molding mold for shoes with patterns on the side of the sole as claimed in claim 5, characterized in that The movable connection between the movable side mold and the bottom mold is an movable connection that allows the movable side mold to move linearly in a direction perpendicular to the side surface of the sole.

7. The injection molding mold for shoes with patterns on the side of the sole according to any one of claims 1 to 6, characterized in that An inner bottom mold is also provided, and an inner bottom mold cavity is arranged on the molding surface of the inner bottom mold for injection molding of the inner layer of the sole.

8. The injection molding mold for shoes with patterns on the side of the sole as claimed in claim 7, characterized in that The clamping mold assembly comprises a left clamping mold and a right clamping mold, and the bottom mold plate and the inner bottom mold are rotatably connected to the outer sides of the left clamping mold and the right clamping mold respectively.

9. The injection molding mold for shoes with patterns on the side of the sole as claimed in claim 8, characterized in that The clamping die opening and closing mechanism comprises a vertical shaft, and the left clamping die and the right clamping die are respectively provided with respective clamping die connecting rods, one end of the clamping die connecting rod is rotatably connected to the vertical shaft, and the other end is fixedly connected to the left clamping die or the right clamping die.

10. The injection molding mold for shoes with patterns on the side of the sole according to claim 9, characterized in that The bottom mold plate and the inner bottom mold are respectively provided with respective shifting rods at their proximal ends relative to the vertical axis, and the left clamping mold and the right clamping mold are respectively provided with respective locking rods at their distal ends relative to the vertical axis, and a locking device is provided between the two locking rods.

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