Injection mold with lateral fine positioning

Abstract

The utility model provides a kind of injection mold with lateral fine positioning, including front mould, back mould and lateral positioning mechanism, the front mould has cavity backing plate, the back mould has fixed plate and push plate, the lateral positioning mechanism includes locating block, the front positioning slot of setting in the side of cavity backing plate and the wear-resistant block of setting in the side of fixed plate, the wear-resistant block has rear positioning slot;The locating block is fixed in the side of the push plate, the locating block has the front support plate of cooperation to front positioning slot and the rear support plate of cooperation to rear positioning slot, the rear support plate and rear positioning slot are all equal-diameter structure and form guiding cooperation;The front support plate and front positioning slot are all the trapezoidal structure of front narrow and back wide and compatible, when the front mould and back mould are closed in place, the front support plate is just pasted on the two side groove walls of front positioning slot. Can effectively reduce maintenance, improve production efficiency and progress.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, and specifically to an injection mold with lateral precision positioning. Background Technology

[0002] Injection molds are tools used to produce plastic products; they are also tools that give plastic products a complete structure and precise dimensions. Injection molding is a processing method used to mass-produce certain complex-shaped parts. Specifically, it refers to injecting heated and molten plastic into the mold cavity under high pressure by an injection molding machine, and obtaining the molded product after cooling and solidification.

[0003] In injection molds with a push plate structure, the molded product is ejected by pushing the push plate. Simultaneously, lateral positioning blocks guide the push plate and position the front and rear molds during mold closing. For example... Figure 1 As shown, existing lateral positioning structures typically fix the positioning block 10 to the fixing plate 3 of the rear mold. Since the positioning block 10 needs to maintain a guiding fit with the push plate 2, the existing positioning block 10 is designed as a long strip of equal diameter, simultaneously providing a guiding fit with both the push plate 2 and the cavity pad 1 of the front mold. All these fits are friction fits. For injection-molded products with safety-compliant housings (referring to electrical housings conforming to safety regulations), the temperature outside the mold can reach 120°C-150°C. At high temperatures, the positioning block 10, push plate 2, and cavity pad 1 are prone to damage due to friction, leading to significant deformation of the components, increased frictional resistance, and consequently, difficulty in mold opening. Utility Model Content

[0004] To address the aforementioned problems, this invention provides an injection mold with lateral precision positioning.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] An injection mold with lateral precision positioning includes a front mold and a rear mold. The front mold has a cavity pad, and the rear mold has a fixed plate and a push plate. The push plate is located between the cavity pad and the fixed plate. The mold also includes a lateral positioning mechanism, which comprises a positioning block, a front positioning groove disposed on the side of the cavity pad, and a wear-resistant block disposed on the side of the fixed plate. The wear-resistant block has a rear positioning groove. The positioning block is fixed to the side of the push plate. The positioning block has a front support plate that engages with the front positioning groove and a rear support plate that engages with the rear positioning groove. The rear support plate and the rear positioning groove are of equal diameter and form a guiding fit. The front support plate and the front positioning groove are both trapezoidal structures that are narrower at the front and wider at the rear and are adapted to each other. When the front mold and the rear mold are closed, the front support plate fits precisely against the two side walls of the front positioning groove.

[0007] Furthermore, the cavity pad, push plate and fixing plate are all provided with a notch on the same side to form a cavity, and the positioning block is disposed in the cavity formed by the cavity pad, push plate and fixing plate without protruding from the side surface of the cavity pad, push plate and fixing plate.

[0008] Furthermore, the cavity pad is fixed with blocks on both sides of the recess to form the front positioning groove. When the front mold and the rear mold are closed, the front support plate fits perfectly against the blocks on both sides.

[0009] Furthermore, the wear-resistant block includes a cover plate and two opposing and parallel baffles disposed on the cover plate. The two baffles form the two groove walls of the rear positioning groove. The rear support plate is fitted between the two baffles and forms a guiding fit with the two baffles. The cover plate covers the outer side of the rear support plate.

[0010] Furthermore, the cover plate and the two baffles are an integrally connected structure.

[0011] Furthermore, the cover plate and two baffles of the wear-resistant block are made of stainless steel.

[0012] Furthermore, when the push plate retracts to fit against the fixed plate, the end of the rear support plate is abutted and restricted.

[0013] Furthermore, the rear mold also includes a rear template, the fixing plate is fixed on the rear template and the fixing plate is located between the rear template and the push plate. When the push plate retracts to fit with the fixing plate, the end of the rear support plate abuts against the rear template.

[0014] Furthermore, there are two lateral positioning mechanisms, which are respectively distributed on opposite sides of the injection mold.

[0015] Furthermore, the positioning block is secured to the push plate by bolts.

[0016] The technical solution provided by this utility model has the following beneficial effects:

[0017] 1. The lateral positioning mechanism provided in this application fixes the positioning block to the push plate, thus avoiding frictional wear between the positioning block and the push plate. The rear support plate of the positioning block and the wear-resistant block fixed on the fixed plate form a guiding fit, effectively reducing wear and ensuring smooth operation over long periods. Simultaneously, due to the change in the fixing method of the positioning block (i.e., fixing the positioning block to the push plate in this application), the positioning block is guided by the rear support plate and the fixed plate of the rear mold. Regarding the fit between the positioning block and the front mold, this application designs both the front support plate and the front positioning groove as trapezoidal structures that are narrower at the front and wider at the rear, and are compatible. When the front mold and the rear mold are in place, the front support plate fits precisely against the two side walls of the front positioning groove. In other positions, the front support plate and the two side walls of the front positioning groove do not contact each other, thus avoiding wear between the positioning block and the cavity pad. Through the above design of this application, maintenance and repair can be effectively reduced, and production efficiency and progress can be improved.

[0018] 2. When the push plate retracts to fit against the fixed plate, the end of the rear support plate is abutted and restricted. With this setting, during assembly, the positioning block can be positioned first by abutting the end of the rear support plate, and then the positioning block can be fixed on the push plate. In this way, the precise fit between the front support plate and the front positioning groove can be guaranteed. Attached Figure Description

[0019] Figure 1 The diagram shown is a schematic representation of the lateral positioning mechanism in the background art.

[0020] Figure 2 The diagram shown is a partial structural schematic of an injection mold with lateral precision positioning in the embodiment.

[0021] Figure 3 As shown Figure 2 Structural decomposition diagram of the structure shown Figure 1 ;

[0022] Figure 4 As shown Figure 2 Structural decomposition diagram of the structure shown Figure 2 . Detailed Implementation

[0023] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0024] In the description of this utility model, terms such as "upper", "lower", "left", "right", "front", and "rear" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0026] Reference Figures 2 to 4 As shown in the illustration, this embodiment provides an injection mold with lateral precision positioning, including a front mold and a rear mold. The front mold has a cavity pad 1, and the rear mold has a fixed plate 3 and a push plate 2. The push plate 2 is located between the cavity pad 1 and the fixed plate 3. For ease of subsequent explanation, the direction towards the front mold is defined as "front," and the direction towards the rear mold is defined as "rear." The push plate 2 moves back and forth relative to the fixed plate 3 to push the product out.

[0027] The system also includes a lateral positioning mechanism, which comprises a positioning block 10, a front positioning groove 101 disposed on the side of the cavity pad 1, and a wear-resistant block 20 disposed on the side of the fixing plate 3. Specifically, the wear-resistant block 20 refers to a structure that is resistant to friction and not easily worn. In this embodiment, the wear-resistant block 20 is made of stainless steel, which is both heat-resistant (referring to a temperature of 120°-150° outside the mold) and not easily worn. Of course, in other embodiments, the wear-resistant block 20 can also be made of other heat-resistant and wear-resistant metal blocks (such as lead blocks) or non-metal blocks (such as ceramic blocks). Meanwhile, the positioning block 10 is preferably also made of a wear-resistant material, which can be the same as or different from the material of the wear-resistant block.

[0028] The wear-resistant block 20 has a rear positioning groove 102; the positioning block 10 is fixed to the side of the push plate 2, and the positioning block 10 has a front support plate 11 that fits into the front positioning groove 101 and a rear support plate 12 that fits into the rear positioning groove 102. The rear support plate 12 and the rear positioning groove 102 are both of equal diameter and form a guiding fit; that is, the rear support plate 12 is a straight plate of equal diameter, the rear positioning groove 102 is a straight groove of equal diameter, and the rear support plate 12 is inserted into the rear positioning groove 102 to achieve a guiding fit, thus ensuring the movement accuracy of the push plate 2. The positioning block 10 is fixed on the push plate 2 to avoid frictional wear between the positioning block 10 and the push plate 2; the rear support plate 12 of the positioning block 10 and the wear-resistant block 20 fixed on the fixing plate 3 form a guiding fit, effectively reducing wear and ensuring smooth operation over a long period of time. Specifically, the guiding fit formed between the rear positioning groove 102 and the rear support plate 12 in this application means that the size of the rear support plate 12 is adapted to the size of the rear positioning groove 102, so that the rear support plate 12 and the rear positioning groove 102 form a transition fit, which plays a limiting and guiding role when moving relative to each other.

[0029] Meanwhile, since the fixing method of the positioning block 10 has been changed (i.e., the positioning block 10 is fixed on the push plate 2 in this application), and the guiding fit between the push plate 2 and the fixed plate 3 has been completed, the fitting method between the positioning block 10 and the front mold is not limited to a frictional guiding fit. As in this embodiment, the front support plate 11 and the front positioning groove 101 are both trapezoidal structures that are narrower at the front and wider at the back and are adapted to each other (in this embodiment, they are isosceles trapezoidal structures). When the front mold and the rear mold are closed in place, the front support plate 11 fits exactly against the two side walls of the front positioning groove 101. With this setting, when the mold opening action is performed in the mold-closed state, the positioning block 10 moves backward with the push plate 2. During this process, the front support plate 11 is pulled out and does not contact the two side walls of the front positioning groove 101, thereby avoiding wear that causes large frictional resistance and thus affecting the mold opening action. This can be understood as follows: only when the front mold and the rear mold are closed in place will the front support plate 11 fit against the two side walls of the front positioning groove 101, thus playing the role of mold closing and positioning.

[0030] In a further preferred embodiment, the cavity pad 1, push plate 2, and fixing plate 3 are all provided with recesses on the same side to form a cavity. The positioning block 10 is disposed within the cavity formed by the cavity pad 1, push plate 2, and fixing plate 3 and does not protrude from the side surface of the cavity pad 1, push plate 2, and fixing plate 3. This arrangement can effectively reduce the overall volume of the injection mold. In this embodiment, the positioning block 10 is locked in the recess of the push plate 2 by bolts 30. The cavity pad 1 is fixed with stop blocks 41 on both sides of its recess to form the front positioning groove 101. That is, the stop blocks 41 on both sides are distributed in a figure-eight shape to serve as the two side walls of the front positioning groove 101. When the front mold and the rear mold are closed, the front support plate 11 fits perfectly against the stop blocks 41 on both sides.

[0031] Meanwhile, regarding the setting of the wear-resistant block 20, the preferred solution of this embodiment is as follows: the wear-resistant block 20 includes a cover plate 21 and two opposing and parallel baffles 22 arranged on the cover plate 21. The cover plate 21 and the two baffles 22 form a U-shaped rear positioning groove 102, and the two baffles 22 form the two groove walls of the rear positioning groove 102. The rear support plate 12 is fitted between the two baffles 22 and forms a guiding fit with the two baffles 22. The cover plate 21 covers the outside of the rear support plate 12. This arrangement can effectively protect the guiding fit between the rear support plate 12 and the rear positioning groove 102, and prevent external dust particles and other impurities from entering the rear positioning groove 102 and affecting the guiding fit.

[0032] Furthermore, the wear-resistant block 20 is an integrally formed structure, that is, the cover plate 21 and the two baffles 22 are an integrally connected structure, which can be directly prepared by casting and other processes, and also fixes the positional relationship of the two baffles 22, so that they do not need to be adjusted during assembly.

[0033] Of course, in other embodiments, the cavity pad 1, push plate 2 and fixing plate 3 may not have a notch structure on the same side. That is, the two blocks 41 that form the two side groove walls of the front positioning groove 101 are directly fixed to the outer surface of the cavity pad 1, the positioning block 10 is directly fixed to the outer surface of the push plate 2, and the wear-resistant block 20 is directly fixed to the outer surface of the fixing plate 3. The wear-resistant block 20 may also include two baffles 22. The positioning block 10 may also be fixed to the push plate 2 by other means such as welding, etc.

[0034] When the push plate 2 retracts to fit against the fixed plate 3, the end of the rear support plate 12 is abutted and restricted. With this configuration, during assembly, the positioning block 10 can be positioned first by having the end of the rear support plate 12 abut against the push plate 2, and then the positioning block 10 can be fixed to the push plate 2. In this way, the precise fit between the front support plate 11 and the front positioning groove 101 can be guaranteed.

[0035] Specifically, in this embodiment, the rear mold further includes a rear template 4, and the fixing plate 3 is fixed on the rear template 4. The fixing plate 3 is located between the rear template 4 and the push plate 2. When the push plate 2 retracts to fit against the fixing plate 3, the end of the rear support plate 12 abuts against the rear template 4. Of course, in other embodiments, the end of the rear support plate 12 may also abut against the fixing plate 3 or the wear-resistant block 20.

[0036] Furthermore, in this embodiment, there are two lateral positioning mechanisms, which are respectively distributed on opposite sides of the injection mold (such as the left and right sides). This arrangement provides a better guiding effect.

[0037] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. An injection mold with lateral fine positioning, comprising a front mold having a cavity plate and a back mold having a fixed plate and a push plate, the push plate being located between the cavity plate and the fixed plate, characterized in that: It also includes a lateral positioning mechanism, which includes a positioning block, a front positioning groove disposed on the side of the cavity pad, and a wear-resistant block disposed on the side of the fixed plate. The wear-resistant block has a rear positioning groove. The positioning block is fixed to the side of the push plate. The positioning block has a front support plate that fits into the front positioning groove and a rear support plate that fits into the rear positioning groove. The rear support plate and the rear positioning groove are both of equal diameter and form a guiding fit. The front support plate and the front positioning groove are both trapezoidal structures that are narrower at the front and wider at the back and are adapted to each other. When the front mold and the rear mold are closed in place, the front support plate just fits against the two side walls of the front positioning groove.

2. Injection mold with lateral fine positioning according to claim 1, characterized in that: The cavity pad, push plate, and fixing plate are all provided with a notch on the same side to form a cavity. The positioning block is disposed in the cavity formed by the cavity pad, push plate, and fixing plate and does not protrude from the side surface of the cavity pad, push plate, and fixing plate.

3. Injection mold with lateral fine positioning according to claim 2, characterized in that: The cavity pad is fixed with blocks on both sides of the recess to form the front positioning groove. When the front mold and the rear mold are closed, the front support plate fits perfectly against the blocks on both sides.

4. Injection mold with lateral fine positioning according to claim 1 or 2, characterized in that: The wear-resistant block includes a cover plate and two opposing and parallel baffles disposed on the cover plate. The two baffles form the two groove walls of the rear positioning groove. The rear support plate is fitted between the two baffles and forms a guiding fit with the two baffles. The cover plate covers the outside of the rear support plate.

5. Injection mold with lateral fine positioning according to claim 4, characterized in that: The cover plate and the two baffles are an integrally connected structure.

6. Injection mold with lateral fine positioning according to claim 4 or 5, characterized in that: The cover plate and two baffles of the wear-resistant block are made of stainless steel.

7. Injection mold with lateral fine positioning according to claim 1, characterized in that: When the push plate retracts to fit against the fixed plate, the end of the rear support plate is resisted and restricted.

8. Injection mold with lateral fine positioning according to claim 7, characterized in that: The rear mold also includes a rear template, the fixing plate is fixed on the rear template and the fixing plate is located between the rear template and the push plate. When the push plate retracts to fit with the fixing plate, the end of the rear support plate abuts against the rear template.

9. Injection mold with lateral fine positioning according to claim 1, characterized in that: There are two lateral positioning mechanisms, which are distributed on opposite sides of the injection mold.

10. Injection mold with lateral fine positioning according to claim 1, characterized in that: The positioning block is secured to the push plate by bolts.

Images