Centering and fixing device for injection mold

Abstract

The utility model discloses a centering fixing device for an injection mold, which relates to the technical field of injection molds and comprises a lower injection mold, an upper injection mold is arranged at the upper end of the lower injection mold, and a central pouring pipe is fixedly arranged in the upper injection mold. According to the utility model, through the elastic arrangement of positioning assemblies, the positioning assemblies are elastically connected to the two sides of an insertion positioning block, the positioning assemblies can move outwards under the elastic action before mold closing, the insertion positioning block is loosened, so that the insertion positioning block can be replaced, and the insertion positioning block is aligned with the positioning assemblies to be inserted in the mold closing process; the plug-in positioning block is extruded and fixed, a mold closing gap is reduced, the precision of the injection molding element is improved, and centering and fixing are achieved through vertical plug-in arrangement of the center pouring pipe, center alignment insertion of the plug rod and the pouring insertion rod and calibration between the auxiliary positioning assembly and the plug-in positioning block.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely is a kind of centering fixing device for injection mold. BACKGROUND

[0002] In injection molding machine, the injection nozzle of injection unit is crimped on the sprue sleeve of metal mold installed on the fixed disc, and the molten resin injected from the hole of injection nozzle is injected into the metal mold through the metal mold sprue hole on the sprue sleeve.

[0003] The utility model discloses a kind of adjustable injection mold with the publication number CN221339290U, including lower mould and upper mould, the upper mould is provided with several guide sliding hole and pouring hole, the guide sliding hole is provided with guide sliding column, the lower mould lower side is provided with fixed plate and installation fixed structure, the fixed plate is provided with several recess, the recess is provided with first telescopic plate, increase the versatility of mould, but this mould pouring hole lacks centering mechanism, so that pouring hole is easy to deviate, it is difficult to keep the stability of mould in injection molding process, and the injection efficiency of pouring hole left and right side is different, product will exist dimensional error and shape error, appear one side vacancy condition, it is difficult to improve product precision.

[0004] For the above problems, a centering fixing device for injection mold is proposed. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of centering fixing device for injection mold, solve the problem that the existing injection mold pouring hole lacks centering mechanism in background art, so that pouring hole is easy to deviate, it is difficult to keep the stability of mould in injection molding process, and the injection efficiency of pouring hole left and right side is different, product will exist dimensional error and shape error, appear one side vacancy condition, it is difficult to improve product precision.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of centering fixing device for injection mold, including injection lower mould, the upper end of the injection lower mould is provided with the injection upper mould for lower pressing mold, the inside of the injection upper mould is fixedly provided with the center pouring pipe for injection material, the injection lower mould includes clamping plate, positioning assembly fixedly arranged at the both sides of clamping plate, the side of the positioning assembly is connected with built-in lower mold closing, the injection upper mould includes two groups of plug-in positioning blocks arranged in two groups of positioning assemblies, two groups of the plug-in positioning blocks are fixed with two groups of built-in upper mold closing, the center pouring pipe includes pouring insertion rod inserted into the center of two groups of built-in upper mold closing, and the plug rod is connected between two groups of plug-in positioning blocks.

[0007] Preferably, the injection molding lower mold further comprises a heightening frame connected to the lower end of the clamping plate, both sides of the heightening frame are fixed with side frames, a base frame is fixedly arranged at the lower end of the side frame, and a spring slot is formed in the clamping plate.

[0008] Preferably, a communication slot is formed in the middle of the built-in lower mold.

[0009] Preferably, the positioning assembly comprises a reset spring arranged at one side of the built-in lower mold, one side of the reset spring is fixed with a supporting block, and a sliding block is fixed at the upper end of the supporting block.

[0010] Preferably, one side of the sliding block is formed as a lower bevel.

[0011] Preferably, the injection molding upper mold further comprises an upper plate connected to the upper end of the plug-in positioning block, one side of the upper plate is fixedly provided with a merging plate, and the built-in upper mold is connected to the inner side of the merging plate and corresponds to the built-in lower mold in an up-down mode.

[0012] Preferably, one side of the plug-in positioning block is formed with an upper bevel, and a positioning rod is fixedly arranged at the lower end of the plug-in positioning block.

[0013] Preferably, the pouring plug rod comprises an opening slot in communication with the communication slot, and a surplus discharging port is formed at the lower end of the opening slot.

[0014] Compared with the prior art, the injection molding center fixing device has the following beneficial effects:

[0015] 1. The injection molding center fixing device provided by the utility model, through the elastic arrangement of the positioning assembly, the built-in upper mold is clamped in the clamping plate, the positioning assembly is elastically connected to both sides of the plug-in positioning block, the positioning assembly moves outward under the elastic action before the mold is closed, the plug-in positioning block is loosened, the plug-in positioning block can be replaced, the built-in upper mold can be combined with the plug-in positioning block to realize mold closing, the plug-in positioning block is inserted in alignment with the positioning assembly during mold closing, the two sets of positioning assemblies can be pushed to move inward, the plug-in positioning block is extruded and fixed, the mold gap is reduced, the precision of the injection molded element is improved, the size error and shape error of the existing injection molding mold product are solved, the case of one-side vacancy is avoided, and the product precision is improved.

[0016] 2. The injection molding center fixing device provided by the utility model, through the up-down plug-in arrangement of the center pouring pipe, the center alignment of the plug rod and the pouring plug rod, the calibration between the auxiliary positioning assembly and the plug-in positioning block, the center fixing is realized, the pouring plug rod blocks the lower end of the plug rod during mold closing of the plug rod, injection leakage is prevented, injection error is reduced, the existing injection molding mold pouring hole lacks a centering mechanism, the pouring hole is easy to deviate, and the stability of the mold during the injection molding process is difficult to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the whole structure schematic view of the utility model;

[0018] Figure 2 It is the split structure schematic view of the injection molding lower mould of the utility model;

[0019] Figure 3 It is the structure schematic view of the injection molding upper mould and the center pouring pipe of the utility model;

[0020] Figure 4 It is the structure schematic view of the injection molding lower mould of the utility model;

[0021] Figure 5 It is the side view structure schematic view of the injection molding lower mould of the utility model;

[0022] Figure 6 It is the split structure schematic view of the injection molding lower mould of the utility model;

[0023] Figure 7 It is the split structure schematic view of the injection molding lower mould of the utility model.

[0024] In the drawing: 1, injection molding lower mould;11, base frame;12, side frame;13, heightening frame;14, clamping plate;141, spring slot;15, built-in lower mould;151, communication groove;16, positioning assembly;161, return spring;162, supporting block;163, sliding block;1631, lower bevel;2, injection molding upper mould;21, upper plate;22, merging plate;23, built-in upper mould;24, plug-in positioning block;241, upper bevel;242, positioning rod;3, center pouring pipe;31, plug rod;32, pouring plug rod;321, opening slot;322, excess material discharge port. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the utility model.

[0026] In order to further understand the content of the utility model, the utility model will be described in detail in conjunction with the drawings.

[0027] In conjunction with Figure 1The utility model discloses a centering fixing device for injection mold, including injection lower mould 1, the upper end of injection lower mould 1 is provided with the injection upper mould 2 for pressing down the injection mould, the inside fixed setting of injection upper mould 2 has the center pouring pipe 3 for injection material, injection lower mould 1 includes the clamping plate 14, the positioning assembly 16 fixedly arranged in the both sides of clamping plate 14, one side of positioning assembly 16 is connected with built-in lower mould 15, injection upper mould 2 includes the two groups of plug -in locating blocks 24 of inserting two groups of positioning assembly 16 settings, two groups of built-in upper mould 23 are fixed between two groups of plug -in locating blocks 24, and the pouring plug 32 of inserting the center of two groups of built-in upper mould 23 is connected in the plug rod 31 between two groups of plug -in locating blocks 24.

[0028] Specifically, the clamping plate 14 is fixed, the built-in upper mould 23 is clamped in the inside of the clamping plate 14, the positioning assembly 16 is elastically connected on the both sides of the plug-in locating block 24, the positioning assembly 16 moves outward under the elastic action before moulding, releases the plug-in locating block 24, so that the plug-in locating block 24 is replaceable, the built-in upper mould 23 can be combined with the plug-in locating block 24 to realize moulding, the plug-in locating block 24 is inserted in alignment with the positioning assembly 16 during moulding, can push two groups of positioning assembly 16 to move inward, extrude and fix the plug-in locating block 24, reduce the moulding gap, improve the precision of injection element, the plug rod 31 and the pouring plug 32 are inserted in alignment with the center, assist the calibration between the positioning assembly 16 and the plug-in locating block 24, realize centering fixing, the pouring plug 32 blocks the lower end of the plug rod 31 when moulding, prevents injection material leakage, reduces injection error.

[0029] The utility model will be further described in connection with the embodiments.

[0030] Embodiment one:

[0031] In combination Figures 2-7 The injection lower mould 1 further includes the heightening stand 13 connected at the lower end of the clamping plate 14, the side stand 12 is fixed on the both sides of the heightening stand 13, the base stand 11 is fixedly arranged at the lower end of the side stand 12, the spring groove 141 is formed on the clamping plate 14, the heightening stand 13 and the side stand 12 are fixedly arranged, support the clamping plate 14, the base stand 11 is heightened, which is convenient for exposing the plug rod 31, the positioning assembly 16 is displaced along the spring groove 141, and the clamping plate 14 limits the movement of the positioning assembly 16.

[0032] The middle part of the built-in lower mould 15 is provided with the communication groove 151, the communication groove 151 leads to the inside of the built-in lower mould 15 on both sides, fills the built-in lower mould 15, and completes the shaping.

[0033] The positioning assembly 16 comprises a reset spring 161 arranged on one side of the built-in lower mold 15, a supporting block 162 fixed on one side of the reset spring 161, and a sliding block 163 fixed on the upper end of the supporting block 162. The reset spring 161 is arranged on one side of the built-in lower mold 15, and provides a pushing force for the sliding block 163 through the supporting block 162. When the injection mold 2 is pressed down, the sliding block 163 moves inward and presses the built-in lower mold 15. When the injection mold 2 is opened, the sliding block 163 moves outward under the action of the reset spring 161, and releases the built-in lower mold 15.

[0034] The sliding block 163 is provided with a lower inclined opening 1631 on one side, and the lower inclined opening 1631 is matched with the plug-in positioning block 24 to realize close extrusion.

[0035] The injection mold 2 further comprises an upper plate 21 connected to the upper end of the plug-in positioning block 24, and a combination plate 22 is fixedly arranged on one side of the upper plate 21. The built-in upper mold 23 is connected to the inner side of the combination plate 22 and corresponds to the built-in lower mold 15 in an up-down manner. The combination plate 22 overlaps the clamping plate 14 in an up-down manner, and the upper plate 21 is connected to the uppermost end. The built-in upper mold 23 is fixedly connected to the pouring plug rod 32.

[0036] The plug-in positioning block 24 is provided with an upper inclined opening 241 on one side, and the plug-in positioning block 24 is fixedly provided with a positioning rod 242 at the lower end. The upper inclined opening 241 is arranged in close contact with the lower inclined opening 1631, and the positioning rod 242 is inserted into the positioning assembly 16 for positioning and fixing.

[0037] Embodiment two:

[0038] In combination Figure 3 And Figure 6 The pouring plug rod 32 comprises an open slot 321 in communication with the communication slot 151, and the open slot 321 is provided with a surplus material discharge port 322 at the lower end. When the injection mold 2 is pressed down, the plug rod 31 is inserted into the surplus material discharge port 322 to realize central positioning and plugging, so as to prevent the pouring plug rod 32 from deviating.

[0039] It should be noted that, in this text, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0040] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A centering fixture for injection molds, comprising an injection mold lower die (1), characterized in that: The upper end of the injection molding lower mold (1) is provided with an injection molding upper mold (2) for pressing the mold together, and the inside of the injection molding upper mold (2) is fixedly provided with a center pouring pipe (3) for injection; The injection molding lower mold (1) comprises a clamping plate (14), a positioning assembly (16) fixedly arranged on both sides of the clamping plate (14), and an inner lower mold (15) connected to one side of the positioning assembly (16); the injection molding upper mold (2) comprises two groups of plug-in positioning blocks (24) inserted into the two groups of positioning assemblies (16), and two groups of inner upper molds (23) fixed between the two groups of plug-in positioning blocks (24); the center pouring pipe (3) comprises a pouring plug rod (32) inserted into the center of the two groups of inner upper molds (23), and a plug rod (31) connected between the two groups of plug-in positioning blocks (24).

2. The centering fixture for injection molds of claim 1, wherein: The injection molding lower mold (1) further comprises a heightening frame (13) connected to the lower end of the clamping plate (14), side frames (12) fixed on both sides of the heightening frame (13), a base frame (11) fixedly arranged at the lower end of the side frame (12), and spring grooves (141) formed in the clamping plate (14).

3. The centering fixture for injection molds of claim 1, wherein: The inner lower mold (15) is provided with a communication groove (151) in the middle part.

4. The centering fixture for injection molds of claim 1, wherein: The positioning assembly (16) comprises a reset spring (161) arranged on one side of the inner lower mold (15), a supporting block (162) fixed to one side of the reset spring (161), and a sliding block (163) fixed to the upper end of the supporting block (162).

5. The centering fixture for injection molds of claim 4, wherein: One side of the sliding block (163) is formed as a downward inclined opening (1631).

6. The centering fixture for injection molds of claim 1, wherein: The injection molding upper mold (2) further comprises an upper plate (21) connected to the upper end of the plug-in positioning block (24), a merging plate (22) fixedly arranged on one side of the upper plate (21), and an inner upper mold (23) connected to the inner side of the merging plate (22) and corresponding to the inner lower mold (15) in an up-down manner.

7. The centering fixture for injection molds of claim 1, wherein: One side of the plug-in positioning block (24) is provided with an upward inclined opening (241), and the lower end of the plug-in positioning block (24) is fixedly provided with a positioning rod (242).

8. The centering fixture for injection molds of claim 3, wherein: The pouring plug rod (32) comprises an opening groove (321) in communication with the communication groove (151), and a surplus material discharge port (322) formed at the lower end of the opening groove (321).

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