An injection mold and an injection method for an injection product with an inclined handle

Abstract

The present invention provides an injection mold and an injection molding method for an injection molded product with an inclined handle. The injection mold includes a first front mold assembly, a second front mold assembly, and a rear mold assembly, which are arranged in sequence from front to back and can move relative to each other, and a mold core located between the second front mold assembly and the rear mold assembly. The mold core is composed of a rear mold core and a front mold core, and the rear mold core and the front mold core together constitute a body cavity for the injection molded product body. The front mold core is spliced together by a plurality of front mold core blocks that can be laterally slidably assembled on the rear mold assembly, and the plurality of front mold core blocks together enclose an inclined insertion cavity. The first front mold assembly is provided with an inclined guide slider, and the guide slider is provided with a slidable slider core. The second front mold assembly is provided with a guide socket corresponding to the insertion cavity. The slider core passes through the guide socket and is inserted into the insertion cavity of the mold core, and together with the front mold core, constitutes a handle cavity for the injection molded handle. The injection molded product with an inclined handle can be well realized.

Description

Technical Field

[0001] The invention relates to the field of injection molds, and in particular to an injection mold and an injection molding method for an injection molded product with an inclined handle. Background Art

[0002] Injection molds are tools used to produce plastic products, giving them a complete structure and precise dimensions. Injection molding is a process used for mass production of complex parts. The process involves injecting heated, molten plastic into the mold cavity under high pressure using an injection molding machine. After cooling and solidification, the resulting molded part is formed.

[0003] like Figure 1 The present invention relates to an injection molded product 100 with an inclined handle, specifically the lower housing of a fascia massage gun for dredging meridians. The injection molded product 100 comprises a body 101 and a hollow handle 102 formed on the body 101 and disposed at an angle. When the product is formed by injection molding, the structure achieved by the existing injection mold is relatively complex, and the demolding pass rate is relatively low. Therefore, further improvements are needed. Summary of the Invention

[0004] To this end, the present invention provides an injection mold for an injection molded product with an inclined handle and an injection molding method using the injection mold to perform injection molding, which can well improve the above-mentioned problem.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An injection mold for an injection molded product with an inclined handle, used for injection molding such as Figure 1 The injection molded product shown; includes a first front mold assembly, a second front mold assembly and a rear mold assembly which are arranged in sequence from front to back and can move relative to each other, and a mold core located between the second front mold assembly and the rear mold assembly; the mold core is composed of a rear mold core and a front mold core, and the rear mold core and the front mold core together constitute a body cavity for the injection molded product body; the front mold core is spliced by a plurality of front mold core blocks which can be laterally slidably assembled on the rear mold assembly, and the plurality of front mold core blocks together enclose an inclined insertion cavity, the first front mold assembly is provided with an inclined guide slider, the guide slider is provided with a slidable slider core, the second front mold assembly is provided with a guide socket corresponding to the insertion cavity, the slider core is inserted into the insertion cavity of the mold core through the guide socket, and together with the front mold core constitutes a handle cavity for the injection molding handle.

[0007] Furthermore, the rear mold core is recessed with a positioning groove at the position corresponding to the insertion cavity, and the rear end of the slider core is formed with a positioning convex portion adapted to the positioning groove. When the slider core is inserted into the insertion cavity, the positioning convex portion is positioned and inserted into the positioning groove to achieve positioning fit.

[0008] Furthermore, a through hole is formed in the positioning groove of the rear mold core, and a positioning pin is installed in the through hole. A positioning slot is also recessed on the positioning protrusion of the slider core. When the positioning protrusion is positioned and inserted in the positioning groove, the positioning pin is simultaneously inserted into the positioning slot of the positioning protrusion.

[0009] Furthermore, a limiting step is formed on the slider core, and the second front mold assembly includes a front mold plate and a static mold core fixedly arranged at the rear end of the front mold plate and corresponding to the mold core. The front mold plate and the static mold core are both provided with guide holes corresponding to the insertion cavity, and the aperture of the guide hole on the static mold core is smaller than the aperture of the guide hole of the front mold plate. When the slider core is inserted into the insertion cavity and in place, the limiting step of the slider core abuts against the static mold core to achieve limiting.

[0010] Furthermore, the front-to-rear straight-line distance when the slider core is separated from the insertion cavity is defined as L1, and the mold also includes a limit buckle machine, which includes a limit screw and a limit slot hole opened on the first front mold assembly. The limit screw is accommodated in the limit slot hole and passes through the first front mold assembly to be fixed on the second front mold assembly. In the mold closing state, the nut of the limit screw and the bottom of the limit slot hole have a distance of L1. When the first front mold assembly moves forward a distance of L1 relative to the second front mold assembly, the slider core is separated from the insertion cavity, and the continued forward movement of the first front mold assembly drives the second front mold assembly to move forward synchronously through the abutment between the nut of the limit screw and the limit slot hole.

[0011] Furthermore, the front-to-back straight-line distance of the slider core out of the insertion cavity is defined as L1, and the mold also includes a sequential latch machine, which includes a fixed seat, a front limit rod and a rear limit rod. The fixed seat is fixedly arranged on the second front mold assembly and is provided with two groups of front-to-back through-holes. The front end of the front limit rod is fixed on the first front mold assembly, and the rear end of the rear limit rod is fixed on the rear mold assembly. In the mold closing state, the front end of the rear limit rod is passed through one group of the through holes of the fixed seat and is fastened and fixed with the fixed seat, and the rear end of the front limit rod passes through the other group of through holes of the fixed seat and extends backward by a distance of L1. The rear end of the front limit rod is formed with a trigger part for triggering the release of the fastening of the rear limit rod and the fixed seat.

[0012] Furthermore, the product body also has an undercut structure, and the mold also includes an undercut molding component, which includes a sliding block and an inclined guide column. The outer peripheral side of the rear mold core is provided with a clearance gap that passes through the main body cavity. The sliding block is formed with an undercut molding structure for molding the undercut structure and an inclined guide slot hole for oblique guide fitting, and can be laterally slidably assembled on the rear mold assembly. The front end of the inclined guide column is fixed on the second front mold assembly, and the rear end thereof is inserted into the oblique guide slot hole of the sliding block to realize oblique guide fitting. The movement of the second front mold assembly toward or away from the rear mold assembly drives the sliding block to insert into the clearance gap through the oblique guide fitting of the inclined guide column and the oblique guide slot hole to make the undercut molding structure in place, or drives the sliding block out of the clearance gap to make the undercut molding structure dislocated.

[0013] Furthermore, the end of the hollow handle also has a bayonet structure, and the mold also includes a bayonet forming assembly, which has a first bayonet forming unit; the first bayonet forming unit is used to prepare a bayonet structure located in the inclined direction of the front end of the slider core, and the first bayonet forming unit includes a first sliding block, a connecting rod, a telescopic driving device and a limit rod, the first sliding block has an undercut molding structure for forming an undercut structure and an oblique guide groove for oblique guide cooperation, the connecting rod is arranged laterally, and an oblique guide rib is formed on its first end, and the oblique guide rib is cooperated with the oblique guide groove of the first sliding block to realize oblique guide cooperation, the telescopic driving device is embedded in the second front mold assembly, and its telescopic driving end is connected to the second end of the connecting rod to drive the first sliding block to switch between the in-position and disengaged positions of the undercut molding structure through the connecting rod, the connecting rod is provided with a limiting notch at a position offset from the front end of the slider core, the front end of the limiting rod is connected to the first front mold assembly, and the rear end thereof corresponds to the limiting notch of the connecting rod, and is inserted into the limiting notch of the connecting rod when the mold is closed to limit the movement of the connecting rod.

[0014] Furthermore, the bayonet forming assembly also has a second bayonet forming unit; the second bayonet forming unit is used to prepare a bayonet structure that is staggered with the front end of the slider core, and the second bayonet forming unit includes a second sliding block and a wedge block, the second sliding block has a bayonet forming structure for forming the bayonet structure and an oblique guide groove for oblique guide cooperation, the front end of the wedge block is fixed on the first front mold assembly, and its rear end forms an oblique guide cooperation with the second sliding block, and the movement of the first front mold assembly towards or away from the second front mold assembly drives the second sliding block to switch between the in-position and out-of-position positions of the bayonet forming structure through the wedge block.

[0015] The present invention provides an injection molding method for an injection molded product with an inclined handle, wherein the injection molded product comprises a product body and a hollow handle formed on the product body and arranged inclined, comprising the following steps:

[0016] A1. Provide the aforementioned injection mold with a front mold slider having a large stroke and sequential mold opening mechanism, and close the mold to insert the slider core into the insertion cavity to form a handle cavity. The body cavity and the handle cavity are connected to obtain the injection molding cavity of the product.

[0017] A2, injecting plastic liquid into the injection mold cavity and cooling and solidifying it to obtain a molded injection molded product;

[0018] A3, moving the first front mold assembly forward until the slider core is driven out of the insertion cavity;

[0019] A4, then move the first front mold assembly and the second front mold assembly forward synchronously to make room for the product to be demoulded;

[0020] A5, drives multiple front mold core blocks to move away from each other to make way;

[0021] A6, ejects the product through the ejector pin of the rear mold assembly to achieve product demoulding.

[0022] The technical solution provided by the present invention has the following beneficial effects:

[0023] The injection mold provided by this solution can well realize the injection molding of injection molded products with inclined handles. The mold structure is simple and the demoulding qualification rate is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Shown is a schematic structural diagram of an injection molded product with an inclined handle;

[0025] Figure 2 The figure shows a schematic diagram of the three-dimensional structure of the injection mold in the embodiment;

[0026] Figure 3 The figure shows a schematic structural diagram of the front mold portion of the injection mold in the embodiment;

[0027] Figure 4 The figure shows the structure of the rear mold part of the injection mold in the embodiment, wherein some structures are hidden;

[0028] Figure 5 The figure shows a side view of the injection mold in the embodiment in the mold closing state;

[0029] Figure 6 The figure shows a cross-sectional view of the injection mold in the embodiment in the mold closing state;

[0030] Figure 7 The figure shows a cross-sectional view of the injection mold in the embodiment when the product is being injection molded;

[0031] Figure 8The figure shows a side view of the injection mold in the embodiment during the mold opening process; the internal structure is hidden;

[0032] Figure 9 The figure shows the cross section of the injection mold during the mold opening process in the embodiment. Figure 1 ;

[0033] Figure 10 The figure shows the cross section of the injection mold during the mold opening process in the embodiment. Figure 2 ;

[0034] Figure 11 The figure shows the cross section of the injection mold during the mold opening process in the embodiment. Figure 3 ;

[0035] Figure 12 The figure shows the internal structure of the injection mold in the embodiment in the mold closing state;

[0036] Figure 13 Shown is a side view of the injection mold in the embodiment Figure 1 ;;Among them, the first fixing seat of the first sequence button is hidden;

[0037] Figure 14 Shown is a side view of the injection mold in the embodiment Figure 2 ; Among them, the second fixing seat of the second sequence trigger is hidden;

[0038] Figure 15 Shown is a side view of the slider core in the embodiment;

[0039] Figure 16 Shown is a schematic diagram of the three-dimensional structure of the slider core in the embodiment. DETAILED DESCRIPTION

[0040] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the present disclosure and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, one of ordinary skill in the art will understand other possible embodiments and the advantages of the present invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0041] At the same time, the directions such as front, back, left, and right involved in this embodiment are only used as a reference for directions and do not represent directions in actual use.

[0042] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0043] The present embodiment provides an injection mold for an injection molded product with an inclined handle, which is used for injection molding. Figure 1The injection molded product 100 shown; Figures 2 to 16 As shown, the injection mold includes a first front mold assembly 11, a second front mold assembly 12 and a rear mold assembly 13 which are arranged in sequence from front to back and can move relative to each other, and a mold core located between the second front mold assembly 12 and the rear mold assembly 13; the mold core is composed of a rear mold core 21 and a front mold core, and the rear mold core 21 and the front mold core together constitute a body cavity 201 for injecting a product body 101; specifically, the first front mold assembly 11 includes a heat insulation board 1 which is arranged in sequence from front to back. 11, panel 112 and heat circulation plate 113; rear mold assembly 13 includes a base 132, a rear mold plate 131 fixedly disposed on the base 132, and a front ejector plate 133 and a rear ejector plate 134 movable forward and backward between the base 132 and the rear mold plate 131. The front ejector plate 133 and the rear ejector plate 134 are connected to ejectors (not shown), which pass through the rear mold plate 131 and the rear mold core 21 into the body cavity 201 to eject the injection molded product 100 during demolding. Of course, in other embodiments, the specific structures of the first front mold assembly 11 and the rear mold assembly 13 are not limited to this.

[0044] The front mold core is composed of a plurality of front mold core blocks 22 that can be laterally slidably assembled on the rear mold assembly 13. In this specific embodiment, the number of the front mold core blocks 22 is two (of course, it can also be more than two). The two front mold core blocks 22 can be attached to the rear mold assembly 13. Figure 6 The two front core blocks 22 together enclose an inclined insertion cavity.

[0045] Specifically, the lateral direction in this embodiment refers to any direction within a plane perpendicular to the front-to-back direction, such as the front-to-back side or the left-to-right side. That is, in an X, Y, and Z coordinate system, if the front-to-back direction is the Z-axis direction, then the lateral direction is any direction within the plane containing the X and Y axes.

[0046] The first front mold assembly 11 is provided with a guide slider 32 arranged obliquely. Specifically, a T-shaped block 31 is fixed to the first front mold assembly 11, and the guide slider 32 is fixed to the T-shaped block 31. The guide slider 32 is provided with a slidable slider core 33. Specifically, Figure 15 As shown, the front end of the slider core 33 has a “⊥”-shaped sliding groove 333 , and the guide slider 32 can be slidably engaged in the “⊥”-shaped sliding groove 333 of the slider core 33 .

[0047] The second front mold assembly 12 is provided with a guide hole (not shown) corresponding to the insertion cavity. The slider core 33 is inserted into the insertion cavity of the mold core through the guide hole and together with the front mold core, forms a handle cavity 202 for injection molding a handle. The handle cavity 202 is the cavity portion left empty after the slider core 33 is inserted into the insertion cavity. In this way, the handle cavity 202 and the body cavity 201 are connected and together form a cavity for molding such as Figure 1 The injection molding cavity 200 of the injection molded product 100 is shown.

[0048] This embodiment also provides an injection molding method for an injection molded product with an inclined handle, using the above injection mold to prepare Figure 1 The injection molded product 100 shown comprises the following steps:

[0049] A1, provide the injection mold of the injection molded product with the inclined handle described above, and close the mold so that the slider core 33 is inserted into the insertion cavity to form the handle cavity 202. The body cavity 201 and the handle cavity 202 are connected to obtain the injection molding cavity 200 of the product; this state is as shown in FIG. Figure 6 shown.

[0050] A2, inject plastic liquid into the injection cavity 200, and cool and solidify it to obtain a molded injection molded product 100, such as Figure 7 shown.

[0051] A3, move the first front mold assembly 11 forward until the slider core 33 is driven out of the insertion cavity, as shown in FIG. Figure 8 and Figure 9 As shown;

[0052] Furthermore, the front-to-back straight-line distance for the slider core 33 to be separated from the insertion cavity is defined as L1. In this step, the first front mold assembly 11 only needs to be moved forward by a distance of L1 relative to the second front mold assembly 12.

[0053] During the forward movement of the first front mold assembly 11 , since the second front mold assembly 12 does not move, the slider core 33 can only move along its inclined axial direction, and can then be smoothly moved out of the insertion cavity, thereby achieving core pulling of the slider core 33 .

[0054] A4, then move the first front mold assembly 11 and the second front mold assembly 12 forward synchronously to make room for the product to be demoulded. Specifically, Figure 10 As shown, the first front mold assembly 11 and the second front mold assembly 12 are synchronously moved a distance L2.

[0055] A5, driving the plurality of front core blocks 22 away from each other to make way;

[0056] After completing step A4, the two front mold core blocks 22 lose the limit of the second front mold assembly 12, and the two front mold core blocks 22 are driven away from each other by the driving device 221 (the oil cylinder in this embodiment), thereby achieving the final core pulling; the mold opening action is completed, as shown in FIG. Figure 11 shown.

[0057] A6, eject the product through the ejector pin of the rear mold assembly 13 to achieve product demoulding.

[0058] The device provided in this solution and the injection molding method based on the device can well realize the injection molding of the product, the mold structure is simple, and the demoulding qualification rate is high.

[0059] Specifically, in this embodiment, the front mold core is composed of a plurality of front mold core blocks 22 that are laterally slidably assembled on the rear mold assembly 13. The front mold core is pulled out of position by sliding laterally. This provides a simple structural design, easy and quick operation for pulling out of position, and better protection for the injection molded product 100. Of course, in other embodiments, the structure of the front mold core is not limited to this, and the front mold core can also be pulled out of position by flipping.

[0060] Furthermore, in this embodiment, the rear mold core 21 has a positioning groove 211 recessed at the position corresponding to the insertion cavity, and the rear end of the slider core 33 is formed with a positioning protrusion 331 adapted to the positioning groove 211. When the slider core 33 is inserted into the insertion cavity, the positioning protrusion 331 is positioned and inserted into the positioning groove 211 to achieve positioning and matching. In this way, the insertion accuracy of the slider core 33 is high, and the dimensional accuracy of the injection molded product 100 is high.

[0061] Furthermore, the positioning groove 211 of the rear mold core 21 further includes a through-hole 212, into which a positioning pin (not shown) is mounted. The positioning protrusion 331 of the slider core 33 further includes a recessed positioning slot 332. When the positioning protrusion 331 is inserted and positioned within the positioning groove 211, the positioning pin simultaneously engages the positioning slot 332 of the positioning protrusion 331. This secondary positioning of the positioning pin and the positioning slot 332, based on the primary positioning between the positioning protrusion 331 and the positioning groove 211, results in higher positioning accuracy. Furthermore, the structure is simple and easy to implement. Of course, in other embodiments, the structure for inserting, positioning, and securing the slider core 33 is not limited to this.

[0062] Furthermore, in this embodiment, a limiting step 334 is formed on the slider core 33. The second front mold assembly 12 includes a front mold plate 121 and a static mold core 122 fixedly disposed at the rear end of the front mold plate 121 and corresponding to the mold core. The front mold plate 121 and the static mold core 122 are both provided with guide holes corresponding to the insertion cavity, and the aperture of the guide hole on the static mold core 122 is smaller than the aperture of the guide hole on the front mold plate 121. When the slider core 33 is inserted into the insertion cavity and in place, the limiting step 334 of the slider core 33 abuts against the static mold core 122 to achieve position limiting. This can effectively prevent the slider core 33 and the mold core from overfitting and causing wear, thereby providing better protection. Of course, this is not limited to other embodiments.

[0063] More specifically, the second front mold assembly 12 also includes a slider seat 123 mounted on the front end of the front mold plate 121. This slider seat 123 also defines a guide hole (not shown). The slider core 33 passes sequentially through the slider seat 123, the front mold plate 121, and the guide holes of the static mold liner 122 before being inserted into the insertion cavity. The slider seat 123 can be made of a smooth, wear-resistant material to ensure accurate guidance of the slider core 33. Of course, in other embodiments, the slider seat 123 may not be required.

[0064] Furthermore, in this embodiment, the mold also includes a limiting buckle machine, which includes a limiting screw 72 and a limiting slot 71 opened on the first front mold component 11. The limiting screw 72 is accommodated in the limiting slot 71 and passes through the first front mold component 11 to be fixed to the second front mold component 12. In the mold closing state, the nut 721 of the limiting screw 72 is at a distance L1 from the bottom of the limiting slot 71. When the first front mold component 11 moves forward a distance L1 relative to the second front mold component 12, the slider core 33 is separated from the insertion cavity, and the nut 721 of the limiting screw 72 also just abuts against the bottom of the limiting slot 71. Figure 8 As shown, the continued forward movement of the first front mold assembly 11 drives the second front mold assembly 12 to move forward synchronously through the engagement of the nut 721 of the limit screw 72 with the limit slot 71. In this way, a simple limit structure can drive the second front mold assembly 12 to move forward synchronously, achieving precise coordination and a simple structure. Of course, in other embodiments, other limit latch structures can be used, or no limit latch is provided between the first and second front mold assemblies 11, 12, with automated control being employed throughout the entire process.

[0065] More specifically, the mold further includes a sequential buckle machine, which includes a fixed seat (such as the first fixed seat 83 of the first sequential buckle machine 80 and the second fixed seat 93 of the second sequential buckle machine 90 described below), a front limit rod (such as the first front limit rod 81 of the first sequential buckle machine 80 and the second front limit rod 91 of the second sequential buckle machine 90 described below) and a rear limit rod (such as the first rear limit rod 82 of the first sequential buckle machine 80 and the second rear limit rod 92 of the second sequential buckle machine 90 described below), and the fixed seat is fixedly arranged on the second front mold. The component 12 is provided with two groups of front-to-back through-holes (not shown). The front end of the front limit rod is fixed to the first front mold component 11, and the rear end of the rear limit rod is fixed to the rear mold component 13. In the mold closing state, the front end of the rear limit rod is passed through one group of the through holes of the fixing seat and is fastened and fixed with the fixing seat, and the rear end of the front limit rod passes through the other group of the through holes of the fixing seat and extends backward by a distance of L1. The rear end of the front limit rod is formed with a trigger portion for triggering the release of the fastening of the rear limit rod and the fixing seat.

[0066] The sequential latch machine and the limit latch machine cooperate in the following manner: when the mold is started (such as step A3 mentioned above), the first front mold assembly 11 is moved forward. In step A3, the first front mold assembly 11 moves forward relative to the second front mold assembly 12. The nut 721 of the limit screw 72 of the limit latch machine still has movable space in the limit slot 71, and the front limit rod of the sequential latch machine also moves forward synchronously. The latching structure of the rear limit rod and the fixed seat enables the second front mold assembly 12 to remain stationary when the first front mold assembly 11 moves forward, thereby preventing the second front mold assembly 12 from moving before the slider core 33 is separated from the insertion cavity, resulting in abnormal demolding. When the first front mold assembly 11 moves forward a distance of L1, i.e., when step A3 is completed, the slider core 33 is released from the insertion cavity, the nut 721 of the limit screw 72 abuts the bottom of the limit slot 71, and the trigger portion of the front limit rod of the sequential locking mechanism also penetrates the clearance hole of the fixing seat and triggers the fastening structure between the rear limit rod and the fixing seat, thereby releasing the fastening between the rear limit rod and the fixing seat. At this point, step A4 is entered, and the continued forward movement of the first front mold assembly 11 will drive the second front mold assembly 12 to move forward synchronously until step A4 is completed.

[0067] By using the above-mentioned sequential latching machine and the position-limiting latching machine in combination, the mechanical structure can also well control the sequence and movement of the mold opening action of the front mold (i.e., the first front mold assembly 11 and the second front mold assembly 12), and has a simple structure, high precision, and low cost. Of course, in other embodiments, the sequential latching machine and the position-limiting latching machine can be used alone to achieve the corresponding function, such as using the sequential latching machine alone to sequentially unlock the first front mold assembly 11 and the second front mold assembly 12, or using the position-limiting latching machine alone; or neither of them can be used, but controlled by numerical control, etc.

[0068] To be more specific, in this embodiment, there are two implementation structures of the sequential latching machine, which are defined as a first sequential latching machine 80 and a second sequential latching machine 90; the mold has four side walls, the first sequential latching machine 80 is arranged on one of the opposite side walls, and the second sequential latching machine 90 is arranged on the other opposite side wall.

[0069] Specifically, refer to Figure 2 、 Figure 3 、 Figure 4 and Figure 13 As shown, the fixing seat, the front limiting rod and the rear limiting rod of the first sequence trigger 80 are respectively the first fixing seat 83, the first front limiting rod 81 and the first rear limiting rod 82. The first sequence trigger 80 also includes a first sliding block 85 and a first elastic member 84 provided in the first fixing seat 83. The first sliding block 85 can slide laterally (as shown in FIG. Figure 13 The first end ( Figure 13 The left end in the middle) and the second end ( Figure 13 The first rear limit rod 82 has a card connector 821 at its front end, and is engaged with the second end of the first sliding block 85 through the card connector 821; the first front limit rod 81 is engaged with the first front limit rod 81 by ... The triggering portion is a convex portion 811 that protrudes and extends toward the first end direction of the first sliding block 85. When the first front mold assembly 11 moves forward a distance L1, the convex portion 811 of the first front limit rod 81 enters the clearance opening of the first sliding block 85 and pushes the first sliding block 85 to overcome the elastic force of the first elastic member 84 and slide toward the first end direction, so that the second end of the first sliding block 85 is disengaged from the card joint 821 of the first rear limit rod 82, thereby realizing the unlocking of the second front mold assembly 12 and the rear mold assembly 13.

[0070] Reference Figure 2 、 Figure 3 、 Figure 4 and Figure 14 As shown, the fixing seat, front limiting rod and rear limiting rod defining the second sequence latch 90 are respectively a second fixing seat 93, a second front limiting rod 91 and a second rear limiting rod 92. The second sequence latch 90 further includes a second sliding block 95, a second elastic member 94 and a limiting protrusion 96 arranged in the second fixing seat 93. The second rear limiting rod 92 adopts a limiting rod with a certain elastic deformation. The side wall of the second rear limiting rod 92 is recessed with a fixing slot (not shown), and is clamped on the limiting protrusion 96 through the fixing slot. Figure 14As shown. The second sliding block 95 can slide laterally (as shown Figure 14 The second sliding block 95 is assembled in the second fixing seat 93, and the two ends of the lateral sliding direction of the second sliding block 95 are respectively the first end ( Figure 14 The right end of the) and the second end ( Figure 14 The second elastic member 94 is arranged between the second fixing seat 93 and the first end of the second sliding block 95, and applies an elastic force toward the second end of the second sliding block 95 to the second sliding block 95, and the second end of the second sliding block 95 corresponds to the second rear limit rod 92. A clearance opening (not shown) is provided at the middle position of the second sliding block 95, and the second front limit rod 91 is passed through the clearance opening of the second sliding block 95 to limit the sliding of the second sliding block 95; the triggering part of the second front limit rod 91 is a laterally recessed clearance step 911. When the first front mold assembly 11 moves forward a distance L1, the clearance step 911 of the second front limit rod 91 enters the clearance opening of the second sliding block 95 to make way for the sliding of the second sliding block 95. The second sliding block 95 slides toward the second end under the action of the second elastic member 94, and hits the second rear limit rod 92 to disengage the second rear limit rod 92 from the limiting protrusion 96, thereby unlocking the second front mold assembly 12 and the rear mold assembly 13.

[0071] More specifically, the first elastic member 84 and the second elastic member 94 are both springs, which have a simple structure, are easy to assemble, and are readily available. Of course, in other embodiments, the first elastic member 84 and / or the second elastic member 94 can also be replaced by other elastic members with elastic force, such as springs.

[0072] The above two sequential locking machines have simple structures and are easy to implement. Of course, in other embodiments, the sequential locking machine is not limited thereto.

[0073] Furthermore, the mold closing steps are as follows: in the mold open state, the first step: the two front mold core blocks 22 are brought together and merged to form an insert cavity and a main body cavity 201; the second step: the second front mold assembly 12 and the rear mold assembly 13 are first closed. When the second front mold assembly 12 is moved, the first front mold assembly 11 and the second front mold assembly 12 are synchronously translated (in this embodiment, the first front mold assembly 11 is driven to move synchronously by a limiting latch machine). In this way, the position of the slider core 33 can be guaranteed to remain unchanged. After the second front mold assembly 12 and the rear mold assembly 13 are completed, the slider core 33 can face the opening of the insert cavity; at the same time, the rear limit rod of the sequential latch machine can also reach the locking position (not locked at this time). Step 3: Clamp the first front mold assembly 11. During the clamping movement of the first front mold assembly 11, the slider core 33 is inserted into the insertion cavity to form the injection cavity 200. At the same time, the triggering part of the front limit rod of the sequential buckle machine is disengaged from the fixed seat, and the rear limit rod and the fixed seat are re-locked. In this way, the clamping process is completed.

[0074] Furthermore, in this embodiment, if Figure 1 As shown, the product body 101 also has an undercut structure 103 . The mold also includes an undercut molding component, which includes a sliding block 41 and an inclined guide column 42. The outer peripheral side of the rear mold core 21 is provided with a clearance gap (not marked) that passes through the main body cavity 201. The sliding block 41 is formed with an undercut molding structure for molding the undercut structure 103 (specifically, the specific layout structure of the undercut molding structure is designed by technicians in this field based on the specific undercut structure 103) and an inclined guide slot hole 411 for oblique guide matching, and can be laterally slidably assembled on the rear mold component 13. The front end of the inclined guide column 42 is fixed on the second front mold component 12, and its rear end is inserted into the oblique guide slot hole 411 of the sliding block 41 to achieve oblique guide matching. The movement of the second front mold component 12 toward or away from the rear mold component 13 drives the sliding block 41 to insert into the clearance gap through the oblique guide matching between the inclined guide column 42 and the oblique guide slot hole 411 to make the undercut molding structure in place or drive the sliding block out of the clearance gap to make the undercut molding structure dislocated. When the second front mold assembly 12 moves closer to the rear mold assembly 13 (when the mold is closed), the inclined guide column 42 is inserted into the inclined guide slot hole 411, thereby driving the slide block 41 to slide inward, that is, inserting the clearance gap to make the undercut molding structure in place for injection molding. When the second front mold assembly 12 moves away from the rear mold assembly 13 (when the mold is opened), the inclined guide column 42 disengages from the inclined guide slot hole 411, thereby driving the slide block 41 to slide outward, that is, disengaging from the clearance gap to make the undercut molding structure dislocated, thereby achieving core pulling and clearance. The structure is simple to implement, and is completed by the opening and closing action of the second front mold assembly 12, without the need for an additional drive mechanism to drive. Of course, in other embodiments, the molding structure that can implement the undercut structure 103 on the product body 101 is not limited to this.

[0075] Furthermore, in this embodiment, if Figure 1 As shown, the end of the hollow handle 102 also has a bayonet structure 104. The mold also includes a bayonet forming component, which includes a first bayonet forming unit and a second bayonet forming unit. The first bayonet forming unit is used to prepare the bayonet structure 104 located at the front end of the slider core 33 in an inclined direction, as shown in FIG. Figure 6 As shown, the front end of the slider core 33 is tilted to the left, so the first bayonet molding unit is used to prepare the bayonet structure 104 located at the left end; and the second bayonet molding unit is used to prepare the bayonet structure 104 that is staggered with the front end of the slider core 33.

[0076] Specifically, the second bayonet forming unit includes a second sliding block 61 and a wedge block 62. The second sliding block 61 has a bayonet forming structure for forming a bayonet structure 104 and an oblique guide groove (not shown) for oblique guide fitting. The front end of the wedge block 62 is fixed on the first front mold assembly 11, and the rear end thereof forms an oblique guide fitting with the second sliding block 61, that is, it is inserted into the oblique guide groove of the second sliding block 61 to realize oblique guide fitting. The movement of the first front mold assembly 11 toward or away from the second front mold assembly 12 drives the second sliding block 61 to switch between the in-position and out-of-position positions of the bayonet forming structure through the wedge block 62. That is, when the first front mold assembly 11 moves toward the second front mold assembly 12, the wedge block 62 drives the second sliding block 61 to move toward the opening of the insert cavity to reach the in-place position for injection molding; when the mold is opened, that is, when the first front mold assembly 11 moves away from the second front mold assembly 12, the wedge block 62 drives the second sliding block 61 to move away from the opening of the insert cavity to reach the disengaged position, thereby achieving core pulling and giving way. Because the second sliding block 61 of the second bayonet molding unit is staggered from the front end of the slider core 33, the wedge block 62 can directly pass through the second front mold assembly 12 and connect to the first front mold assembly 11, and the structural setting is simple.

[0077] Of course, in other embodiments, the structure in which the wedge block 62 drives the second sliding block 61 to form an oblique guide fit is not limited thereto.

[0078] The first bayonet forming unit of this embodiment includes a first sliding block 51, a connecting rod 52, a telescopic driving device 53 and a limiting rod 54. The first sliding block 51 has a bayonet forming structure for forming the bayonet structure 104 (specifically, the specific layout structure of the bayonet forming structure is designed by those skilled in the art based on the specific bayonet structure) and an inclined guide groove (not shown) for inclined guide matching. The first sliding block 51 can be slidably assembled on the second front mold assembly 12. The connecting rod 52 is arranged laterally (i.e., perpendicular to the front and rear directions), and a first end thereof is formed with an inclined guide rib (not shown), and is matched with the first front mold assembly 12 through the inclined guide rib. The oblique guide groove of the sliding block 51 realizes oblique guide cooperation. The telescopic drive device 53 (in this embodiment, a pneumatic cylinder, oil cylinder, etc.) is embedded in the second front mold assembly 12. Its telescopic drive end is connected to the second end of the connecting rod 52, so as to drive the first sliding block 51 to switch between the in-position and out-position positions of the bayonet molding structure through the connecting rod 52. The connecting rod 52 is provided with a limiting notch (not shown) at a position offset from the front end of the slider core 33. The front end of the limiting rod 54 is connected to the first front mold assembly 11, and the rear end thereof corresponds to the limiting notch of the connecting rod 52. When the mold is closed, it is inserted into the limiting notch of the connecting rod 52 to limit the movement of the connecting rod 52. With this arrangement, the first sliding block 51 is driven by the laterally arranged connecting rod 52, and then by the telescopic drive device 53 to drive the connecting rod 52 to move laterally, thereby driving the first sliding block 51 to slide and switch, cleverly avoiding obstruction directly in front of the first sliding block 51.

[0079] At the same time, the addition of the limiting rod 54 effectively limits the position of the first sliding block 51 after mold closing, making the position of the first sliding block 51 more stable. Moreover, after mold opening, the limiting rod disengages from the limiting notch of the connecting rod 52 as the first front mold assembly 11 is disengaged, thereby naturally releasing the restriction. This clever structural design eliminates the need for an additional mechanism to control the limiting rod 54. Of course, in other embodiments, the first bayonet molding unit may also not adopt the limiting rod 54 structure.

[0080] Specifically, the oblique guide matching structure of the connecting rod 52 and the first sliding block 51 is not limited thereto, and may also be implemented in other ways, such as providing an oblique guide groove on the connecting rod 52 and providing an oblique guide rib on the first sliding block 51 that matches the oblique guide groove.

[0081] Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims, and all such changes are within the scope of protection of the present invention.

Claims

1. An injection mold for an injection molded product with an inclined handle, the injection molded product comprising a product body and a hollow handle formed on the product body and arranged inclined; characterized in that: The invention comprises a first front mold assembly, a second front mold assembly and a rear mold assembly which are arranged in sequence from front to rear and can move relatively, and a mold core located between the second front mold assembly and the rear mold assembly; the mold core is composed of a rear mold core and a front mold core, and the rear mold core and the front mold core together constitute a body cavity for injection molding a product body; the front mold core is spliced by a plurality of front mold core blocks which can be laterally slidably assembled on the rear mold assembly, and the plurality of front mold core blocks together enclose an inclined insertion cavity, the first front mold assembly is provided with an inclined guide slider, the guide slider is provided with a slidable slider core, the second front mold assembly is provided with a guide socket corresponding to the insertion cavity, the slider core is inserted into the insertion cavity of the mold core through the guide socket, and together with the front mold core constitutes a handle cavity for injection molding a handle; A limiting step is formed on the slider core, and the second front mold assembly includes a front mold plate and a static mold core fixedly arranged at the rear end of the front mold plate and corresponding to the mold core. The front mold plate and the static mold core are both provided with guide holes corresponding to the insertion cavity, and the aperture of the guide hole on the static mold core is smaller than the aperture of the guide hole of the front mold plate. When the slider core is inserted into the insertion cavity and in place, the limiting step of the slider core abuts against the static mold core to achieve limiting. The end of the hollow handle also has a bayonet structure, and the mold also includes a bayonet forming assembly, wherein the bayonet forming assembly has a first bayonet forming unit and a second bayonet forming unit; the first bayonet forming unit is used to prepare a bayonet structure located in the inclined direction of the front end portion of the slider core, the first bayonet forming unit includes a first sliding block, a connecting rod, a telescopic driving device and a limiting rod, the first sliding block has an undercut molding structure for forming an undercut structure and an oblique guide groove for oblique guide cooperation, the connecting rod is arranged laterally, and an oblique guide rib is formed on its first end, and the oblique guide rib is used to cooperate with the oblique guide groove of the first sliding block to achieve oblique guide cooperation, the telescopic driving device is embedded in the second front mold assembly, and its telescopic driving end is connected to the second end of the connecting rod to drive the first sliding block to switch between the in-position and dislocated positions of the undercut molding structure through the connecting rod, the connecting rod is provided with a limiting notch at a position staggered from the front end portion of the slider core, the front end of the limiting rod is connected to the first front mold assembly, and the rear end thereof corresponds to the limiting notch of the connecting rod, and is inserted into the limiting notch of the connecting rod when the mold is closed to limit the movement of the connecting rod; The second bayonet forming unit is used to prepare a bayonet structure that is staggered with the front end of the slider core. The second bayonet forming unit includes a second sliding block and a wedge block. The second sliding block has a bayonet forming structure for forming the bayonet structure and an oblique guide groove for oblique guide cooperation. The front end of the wedge block is fixed on the first front mold assembly, and the rear end thereof forms an oblique guide cooperation with the second sliding block. The movement of the first front mold assembly toward or away from the second front mold assembly drives the second sliding block to switch between the in-position position and the out-of-position position of the bayonet forming structure through the wedge block.

2. The injection mold for the injection molded product with an inclined handle according to claim 1, characterized in that: The rear mold core is recessed with a positioning groove at a position corresponding to the insertion cavity, and the rear end of the slider core is formed with a positioning convex portion adapted to the positioning groove. When the slider core is inserted into the insertion cavity, the positioning convex portion is positioned and inserted into the positioning groove to achieve positioning fit.

3. The injection mold for the injection molded product with an inclined handle according to claim 2, characterized in that: A through hole is also formed in the positioning groove of the rear mold core, and a positioning pin is installed in the through hole. A positioning slot is also recessed on the positioning protrusion of the slider core. When the positioning protrusion is positioned and inserted in the positioning groove, the positioning pin is simultaneously inserted into the positioning slot of the positioning protrusion.

4. The injection mold for the injection molded product with an inclined handle according to claim 1, characterized in that: The front-to-rear straight-line distance when the slider core is separated from the insertion cavity is defined as L1. The mold also includes a limit button machine, which includes a limit screw and a limit slot hole opened on the first front mold assembly. The limit screw is accommodated in the limit slot hole and passes through the first front mold assembly to be fixed on the second front mold assembly. In the mold closing state, the nut of the limit screw and the bottom of the limit slot hole have a distance of L1. When the first front mold assembly moves forward a distance of L1 relative to the second front mold assembly, the slider core is separated from the insertion cavity, and the continued forward movement of the first front mold assembly drives the second front mold assembly to move forward synchronously through the abutment between the nut of the limit screw and the limit slot hole.

5. The injection mold for the injection molded product with an inclined handle according to claim 1, characterized in that: The front-to-back straight-line distance for the slider core to disengage from the insertion cavity is defined as L1. The mold also includes a sequential latch machine, which includes a fixed seat, a front limit rod and a rear limit rod. The fixed seat is fixedly arranged on the second front mold assembly and is provided with two groups of front-to-back through-holes. The front end of the front limit rod is fixed on the first front mold assembly, and the rear end of the rear limit rod is fixed on the rear mold assembly. In the mold closing state, the front end of the rear limit rod is passed through one group of the through holes of the fixed seat and is fastened and fixed with the fixed seat, and the rear end of the front limit rod passes through the other group of through holes of the fixed seat and extends backward by a distance of L1. The rear end of the front limit rod is formed with a trigger part for triggering the release of the fastening of the rear limit rod and the fixed seat.

6. The injection mold for the injection molded product with an inclined handle according to claim 1, characterized in that: The product body also has an undercut structure, and the mold also includes an undercut molding component, which includes a sliding block and an inclined guide column. The outer peripheral side of the rear mold core is provided with a clearance gap that passes through the main body cavity. The sliding block is formed with an undercut molding structure for molding the undercut structure and an inclined guide slot hole for oblique guide cooperation, and can be laterally slidably assembled on the rear mold assembly. The front end of the inclined guide column is fixed on the second front mold assembly, and the rear end thereof is inserted into the oblique guide slot hole of the sliding block to realize oblique guide cooperation. The movement of the second front mold assembly close to or away from the rear mold assembly drives the sliding block to insert into the clearance gap through the oblique guide cooperation between the inclined guide column and the oblique guide slot hole to make the undercut molding structure in place, or drives the sliding block out of the clearance gap to make the undercut molding structure dislocated.

7. A method for injection molding an injection molded product with an inclined handle, wherein the injection molded product comprises a product body and a hollow handle formed on the product body and arranged inclinedly, wherein: The steps include: A1. Provide an injection mold for an injection-molded product with a tilted handle according to any one of claims 1 to 6, and close the mold so that the slider core is inserted into the insertion cavity to form a handle cavity. The body cavity and the handle cavity are connected to obtain an injection molding cavity for the product. A2, injecting plastic liquid into the injection mold cavity and cooling and solidifying it to obtain a molded injection molded product; A3, moving the first front mold assembly forward until the slider core is driven out of the insertion cavity; A4, then move the first front mold assembly and the second front mold assembly forward synchronously to make room for the product to be demoulded; A5, drives multiple front mold core blocks to move away from each other to make way; A6, ejects the product through the ejector pin of the rear mold assembly to achieve product demoulding.

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